Abrégé

A V2G charging/discharging system and a control method and device therefor, and a computer readable storage medium. The control method comprises: if a power grid is at peak electricity consumption, determining a first-type electric vehicle capable of feeding energy back to the power grid within a preset distance range of a V2G charging/discharging system, and a first energy feedback income from the first-type electric vehicle feeding energy back to the power grid; sending the first energy feedback income to the first-type electric vehicle; and upon detection that a second-type electric vehicle that sends information indicative of feeding energy back to the power grid in the first-type electric vehicle is connected to a V2G charging/discharging device, controlling the V2G charging/discharging device to feed energy back to the power grid. In this way, an electric vehicle capable of feeding energy back to a power grid can be automatically determined, and a corresponding energy feedback income is generated, so as to conveniently and quickly guide a vehicle owner to make a decision, thereby increasing the probability of the vehicle owner authorizing the electric vehicle to feed energy back to the power grid, achieving high vehicle owner participation, improving the utilization of the V2G charging/discharging system, and then effectively adjusting power grid load fluctuation.

Classes IPC  ?

• B60L 55/00 - Dispositions relatives à la fourniture d'énergie emmagasinée dans un véhicule à un réseau électrique, c.-à-d. du véhicule au réseau [V2G]
• B60L 53/60 - Surveillance et commande des stations de charge
• B60L 53/64 - Optimisation des coûts énergétiques, p. ex. en répondant aux tarifs d'électricité
• B60L 53/66 - Transfert de données entre les stations de charge et le véhicule

Abrégé

A high-temperature resistant fireproof material, a preparation method therefor and use thereof. The high-temperature resistant fireproof material comprises a gel material and a framework material. The mass fraction of aluminium oxide in the gel material is 33-50%. The framework material is a material having a hollow structure. By controlling the mass fraction of aluminium oxide in the gel material to 33-50%, it is possible to ensure that the gel material fully undergoes a hydration reaction and provides early strength for the fireproof material, thereby improving the breakdown resistance of the fireproof material.

Classes IPC  ?

• C04B 35/66 - Réfractaires monolithiques ou mortiers réfractaires, y compris ceux contenant de l'argile
• C04B 111/28 - Résistance au feu
• C04B 14/18 - Perlite

Abrégé

A detection method and system for insulation aging degree of superconducting cable. The detection method comprises: applying excitation voltages of different frequencies on a sample, and calculating a dielectric loss angle tangent corresponding to the sample at different frequencies by measuring the voltage and current of the sample (S1); and acquiring a detection result of the insulation aging degree of the sample according to the dielectric loss angle tangent corresponding to the sample at different frequencies (S2).

Classes IPC  ?

• G01R 31/12 - Test de la rigidité diélectrique ou de la tension disruptive
• G01R 27/26 - Mesure de l'inductance ou de la capacitanceMesure du facteur de qualité, p. ex. en utilisant la méthode par résonanceMesure de facteur de pertesMesure des constantes diélectriques
• G01R 27/08 - Mesure de la résistance par mesure à la fois de la tension et de l'intensité

Abrégé

Disclosed are a mass data sharing method, an open sharing platform and an electronic device. The mass data sharing method comprises: receiving a target shared directory access request sent by a user terminal, wherein a target shared directory is constructed based on storage metadata of data requested to be accessed by the user terminal, and the target shared directory is associated with configuration metadata of a storage platform storing the data requested to be accessed by the user terminal; creating a container assembly according to the configuration metadata, wherein the container assembly pulls a mirror image file of the data requested to be accessed by the user terminal to form a shared gateway; connecting the user terminal and the shared gateway; and sending to the user terminal the data requested to be accessed by the user terminal.

Classes IPC  ?

• H04L 29/06 - Commande de la communication; Traitement de la communication caractérisés par un protocole

Abrégé

A transformer monitoring system and method. The system comprises a transformer bushing (1), an overvoltage and partial discharge integrated sensor module (2), a first coaxial cable transmission module (31), a second coaxial cable transmission module (32), an amplitude attenuation and low-pass filtering module (4), a band-pass filtering and signal amplification module (5), a first data acquisition device (61), a second data acquisition device (62), a data analysis, display, storage and transmission module (7), and a data monitoring and fault diagnosis module (8).

Classes IPC  ?

• G01R 31/12 - Test de la rigidité diélectrique ou de la tension disruptive

Abrégé

Disclosed are an online correction device and method for power cable cross connection. Said device is connected to a cross-connection box, said device comprises an inner core connection mechanism, an outer core connection mechanism, an inner core series resistor, an outer core series resistor, a phase sequence switching mechanism, a grounding switching mechanism, an operation control mechanism and a grounding electrode; the inner core connection mechanism is configured to connect an inner core electrode of the cross-connection box; the outer core connection mechanism is configured to connect an outer core electrode of the cross-connection box; the inner core connection mechanism is respectively connected, inside the device, to the inner core series resistor and the grounding switching mechanism, the outer core connection mechanism is respectively connected to the outer core series resistor and the grounding switching mechanism, and the operation control mechanism is respectively connected to and controls the phase sequence switching mechanism and the grounding switching mechanism.

Classes IPC  ?

• H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif

Abrégé

Disclosed is a method for evaluating the security of a closed-loop operation of a medium-voltage distribution network. The method includes: on the basis of acquired topological structures and device parameters of a closed-loop network, and acquired real-time running data before loop closing of the closed-loop network, estimating a state of a high-voltage distribution network to obtain voltage amplitude values and phase angles of 10kV buses at head ends of closed-loop feeders; selecting a ratio of an active load of each load point on each of the closed-loop feeders to the active power at the head end of the feeder and a ratio of a reactive load of each load point on the closed-loop feeder to the reactive power at the head end of the feeder as input variables, and calculating, on the basis of historical load data of each load point, a multi-order semi-invariant of each of the input variables; calculating a certainty power flow and closed-loop currents; calculating multi-order semi-invariants of the closed-loop currents; obtaining the cumulative probability distribution of the closed-loop currents; and calculating the limit violation probability of each of the closed-loop currents, and determining that a closed-loop operation has security insofar as the multiple limit violation probabilities are all less than a pre-set threshold value.

Classes IPC  ?

• H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif

Abrégé

Disclosed is a combinatorial optimization scheduling method for predicting task execution time, comprising: combinatorially optimizing a predictive execution task scheduling model on the basis of combination re-execution scheduling technology (CREST); on the basis of the predictive execution task scheduling model, collecting fine-grained resource information of inter-node bandwidth and node processing capacity; obtaining an expected completion time of a rescheduling task according to the fine-grained resource information of inter-node bandwidth and node processing capacity; designing a scheme for re-executing a slow task combination, and obtaining an expected completion time of slow task combination re-execution; designing a slow task optimal combination re-execution scheme, and obtaining a target equation for combination re-execution optimization according to the expected completion time of the re-scheduling task and the expected completion time of the slow task combination re-execution; and setting weights, and obtaining an effectively shortened predictive execution task running time using the target equation for combination re-execution optimization.

Classes IPC  ?

• H04L 29/08 - Procédure de commande de la transmission, p.ex. procédure de commande du niveau de la liaison
• H04L 12/24 - Dispositions pour la maintenance ou la gestion

Abrégé

Disclosed is a method for performing rapid probabilistic modeling of large-scale renewable-energy data, containing the following processes: on the basis of Spark and a Hadoop distributed file system (HDFS), building a distributed parallel framework for rapid modeling of new energy, causing said framework to be compatible with existing renewable-energy storage systems; using the fault tolerance feature of a resilient distributed dataset (RDD) and features based on memory computation, constructing a Wakeby probability distribution model to estimate an RDD-based Wakeby probability distribution model.

Classes IPC  ?

• G06F 17/30 - Recherche documentaire; Structures de bases de données à cet effet

Abrégé

A capacitive voltage mutual inductor (2) for a transient over-voltage monitoring system comprises a first capacitor (C1), a second capacitor (C2), a third capacitor (C3), an intermediate transformer (T), a transient over-voltage monitoring unit (M), a grounding switch (K), a compensation reactor (L) and a first lightning arrester (BL1). One end of the first capacitor (C1) is connected to a power grid (1), and the other end is respectively connected to one end of the second capacitor (C2) and one end of a primary winding in the intermediate transformer (T). The other end of the second capacitor (C2) is respectively connected to one end of the transient over-voltage monitoring unit (M) and one end of the compensation reactor (L). The other end of the primary winding of the intermediate transformer (T) is respectively connected to the other end of the compensation reactor (L) and one end of the first lightning arrester (BL1). The other end of the transient over-voltage monitoring unit (M) and the other end of the first lightning arrester (BL1) are both grounded. The grounding switch (K) is connected in parallel at the two ends of the transient over-voltage monitoring unit (M). One end of the third capacitor (C3) is connected to the other end of the second capacitor (C2), and the other end of the third capacitor (C3) is grounded. A voltage bearable by the first capacitor (C1) is greater than a voltage bearable by the second capacitor (C2), and the voltage bearable by the second capacitor (C2) is greater than a voltage bearable by the third capacitor (C3).

Classes IPC  ?

• G01R 15/06 - Diviseurs de tension avec des composantes réactives, p. ex. transformateurs à capacité
• G01R 19/165 - Indication de ce qu'un courant ou une tension est, soit supérieur ou inférieur à une valeur prédéterminée, soit à l'intérieur ou à l'extérieur d'une plage de valeurs prédéterminée

Abrégé

A device for generating power by means of collecting and storing idle kinetic energy comprises: an oil tank (1); at least one group of speed reduction plate energy collection devices (2), at least two energy storage loops (5-1, 5-2), and a power generation device. The speed reduction plate energy collection devices (2) are connected to the oil tank (1) by means of pipelines, and hydraulic oil in the oil tank (1) is sucked into the speed reduction plate energy collection devices (2). The energy storage loops (5-1, 5-2) are in pipeline connection with the speed reduction plate energy collection devices (2), and sequentially collect high-pressure oil provided by the speed reduction plate energy collection devices (2), and until the maximum energy storage is reached, the energy storage loops (5-1, 5-2) starts to supply oil to the power generation device. The power generation device is in pipeline connection with the energy storage loops (5-1, 5-2), and continuously generates power by sequentially using high-pressure oil collected by the energy storage loops. In the device, idle kinetic energy of a vehicle can be stored in an energy storage device in order by means of a hydraulic system, so that continuous output of electric energy can be implemented, the power generation scale is great, and the power generation efficiency is high.

Classes IPC  ?

• F03G 7/00 - Mécanismes produisant une puissance mécanique, non prévus ailleurs ou utilisant une source d'énergie non prévue ailleurs

Abrégé

A distribution network failure isolation and recovery method realizing penetration distributed generation, which belongs to the field of distribution network operation management. It is characterized in that a failure isolation and recovery process of a distribution network containing distributed generation is realized based on an intelligent distributed feeder automation mode, the degree of intelligentization is high in the failure clearance and recovery process thereof, the judgement is rapid and accurate, the logical conditions can be modified or supplemented according to the actual topological structure of a power grid, the whole control mode is based on the existing device but not limited by the existing device, and along with the continual upgrading of a smart power grid device, various action logical conditions can be modified and supplemented according to the actual topological structure of the power grid, being convenient for computer simulation and failure power flow analysis, and providing a guarantee for dispatching and operation management of a distribution network containing penetration distributed generation. This can be widely applied to the fields of dispatching, operation management and failure emergency treatment of smart power grids.

Classes IPC  ?

• H02H 7/26 - Protection sectionnelle de systèmes de câbles ou de lignes, p. ex. pour déconnecter une section dans laquelle un court-circuit, un défaut à la terre, ou une décharge d'arc se sont produits
• H02H 3/06 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion Détails avec reconnexion automatique

Abrégé

A dynamic equivalence method for AC/DC hybrid large power grid based on engineering application belongs to the field of electric transformation and distribution. The power grid to be analyzed is divided into an external subarea power grid and an internal subarea power grid. The 500kV internal subarea power grid is fully simulated. The equivalent simplifications of the external subarea power grid and the low voltage internal subarea power grid are performed. The simplified external subarea power grid is obtained with equivalence generators by the dynamic equivalence method based on experience. The equivalent simplification of the low voltage internal subarea power grid is performed by the dynamic equivalence method based on physical equivalence, so as to obtain the final simplified internal subarea power grid. The effect of equivalence is checked after the equivalence of the external subarea power grid and the internal subarea power grid. By comparing the dynamic response characteristics in the same fault of the simplified system and that of the actual system, the validity of the whole dynamic equivalence principle and method is checked. The state parameters of the equivalence system and the number of the differential equations are reduced, and the efficiency of the analysis and calculation of the system is improved. The method can be widely applied for the fields of the analysis and calculation of the hybrid large power grid and the dispatching management of power grid.

Classes IPC  ?

• H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif

Abrégé

A measuring system for measuring ion current field distribution characteristics under direct current transmission. The system comprises a direct current electric filed strength sensor, an ion current collection sensor, a meteorological parameter sensor and a multi-channel real-time synchronous control device, wherein the direct current electric field strength sensor, the ion current collection sensor and the meteorological parameter sensor are evenly distributed in a measuring field; the multi-channel real-time synchronous control device is respectively connected with the direct current electric field strength sensor, the ion current collection sensor and the meteorological parameter sensor and is used for receiving data acquired by the direct current electric field strength sensor, the ion current collection sensor and the meteorological parameter sensor in real time, and carrying out characteristic analysis and storage on the data. The measuring system has the advantages that the multi-parameter multi-channel real-time measurement is realized, the measurement precision is high, and the like.

Classes IPC  ?

• G01R 31/00 - Dispositions pour tester les propriétés électriquesDispositions pour la localisation des pannes électriquesDispositions pour tests électriques caractérisées par ce qui est testé, non prévues ailleurs

Abrégé

Provided is a transition method for a monitoring system modification process during intelligent modification of a conventional substation. The method comprises: modifying a 61850 protocol measurement and control device of a bus first, replacing an original bus measurement and control device, and accessing a 61850 protocol intelligent station control level network so as to achieve a spacer-layer logic locking function measured and controlled by the bus and responsible for a remote control operation of an earthing knife switch of the bus; not dismantling the original bus measurement and control device, forbidding a remote control operation function thereof, and guaranteeing the improvement of the spacer-layer logic locking function of an original 103 protocol network side switch; suspending the spacer-layer interlocking function related to the bus measurement and control device in the 61850 protocol intelligent station control level network, and guaranteeing the integrity of a bus disconnecting switch locking function by means of a logic locking function of the station control level; and modifying the original 103 protocol measurement and control devices successively according to strings based on a power outage plan, recovering the bus spacer-layer interlocking function of the 61850 protocol intelligent station control level network after all the modification is finished, achieving the integrity of full-station spacer-layer interlocking, and dismantling the original 103 protocol bus measurement and control devices. The method can be widely used in the field of intelligent modification of conventional substations.

Classes IPC  ?

• H02J 13/00 - Circuits pour pourvoir à l'indication à distance des conditions d'un réseau, p. ex. un enregistrement instantané des conditions d'ouverture ou de fermeture de chaque sectionneur du réseauCircuits pour pourvoir à la commande à distance des moyens de commutation dans un réseau de distribution d'énergie, p. ex. mise en ou hors circuit de consommateurs de courant par l'utilisation de signaux d'impulsion codés transmis par le réseau

Abrégé

Disclosed is an automatic detection device for a harmful gas, comprising a moving device (1), a guider provided at the bottom of the moving device (1), a connector (3) provided at the bottom of the moving device (1), a dual gas probe box (5) and a remote controller (4); wherein the moving device (1) comprises a control module (11) and a wheel module, the control module (11) is connected to the guider, the connector (3) and the remote controller (4), respectively, the guider is connected to the wheel module, and the connector (3) is connected to the dual gas probe box (5).

Classes IPC  ?

• G01N 33/00 - Recherche ou analyse des matériaux par des méthodes spécifiques non couvertes par les groupes
• G08C 17/02 - Dispositions pour transmettre des signaux caractérisées par l'utilisation d'une voie électrique sans fil utilisant une voie radio

Abrégé

A small-sized high voltage cable state monitoring device comprises a sensor group (1) for front end measurement and a data acquisition terminal (2), wherein the sensor group (1) for front end measurement is connected with the data acquisition terminal (2); all the acquired data are transmitted to the data acquisition terminal (2) by the sensor group (1) for front end measurement; and after analog-digital (AD) conversion treatment is carried out on the data by the data acquisition terminal, the data are sent into an upper computer. Compared with the prior art, the small-sized high voltage cable state monitoring device has the advantages of being small in volume, convenient to install, reliable in work and the like.

Classes IPC  ?

• G01D 21/02 - Mesure de plusieurs variables par des moyens non couverts par une seule autre sous-classe
• G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
• G08C 17/02 - Dispositions pour transmettre des signaux caractérisées par l'utilisation d'une voie électrique sans fil utilisant une voie radio

Abrégé

An amplifying device used for a capacitor partial discharge on-line monitoring system. The capacitor partial discharge on-line monitoring system comprises a current sensor (IV) and a signal collecting device (VIII). The amplifying device comprises a voltage follower unit (I), an amplifying unit (II), and a cable driving unit (III). An input end of the voltage follower unit (I) is connected to the current sensor (IV), an input end of the amplifying unit (II) is connected to the voltage follower unit (I), an output end is connected to the cable driving unit (III), and the cable driving unit (III) is connected to the signal collecting device (VIII). Compared with the prior art, the amplifying device has advantages of eliminating influence of amplifier impedance on sensor impedance, and influence of refraction and reflection on signal transmission.

Classes IPC  ?

• G01R 31/12 - Test de la rigidité diélectrique ou de la tension disruptive

Abrégé

A hydraulic electromagnetic generation device for collecting idle kinetic energy of vehicles comprises a protective cover (2), an energy collector (4), one-way valves (5, 12), a hydraulic motor (9), an electromagnetic generator (6), an energy storage device (7) and pipelines (11). For controlling flow rate of fluid in the pipelines, the device also comprises a buffer device (10). The energy storage device (7) is an accumulator. The device can be used at places for decelerating or braking vehicles such as freeway toll stations, retarding areas, turning sites, and has the advantages of simply structure, low cost and high energy conversion efficiency.

Classes IPC  ?

• F03G 7/08 - Mécanismes produisant une puissance mécanique, non prévus ailleurs ou utilisant une source d'énergie non prévue ailleurs récupérant l'énergie produite par le balancement, le roulement, le tangage ou des mouvements semblabes, p. ex. par les vibrations d'une machine

Abrégé

The present invention relates to the technical field of control of electric systems. Disclosed is an equipment overload successive approximation adaptive control method based on centralized real-time decisions. The method estimates in real time permissible current for long-term running of equipment and continuous running time according to current and temperature actual measurement information of the equipment. Control modes are decided according to the continuous running time of the equipment instead of current. On the basis of mixed integer nonlinear programming algorithm, a target function which aims to control the total cost and minimize comprehensive indexes of proportions of load control quantities of different regions is adopted, discreteness and cost of a control measure are taken into consideration, flow restraint of an electric system is measured, an centralized optimization decision and successive approximation control strategy are adopted, coordination to real-time scheduling operation control and emergency control for overload of equipment of the electric system is realized, and problems that scheduling operation control and application time is insufficient, control quantity is insufficient, control cost is over high, load control measures are over centralized and the like are solved.

Classes IPC  ?

• H02H 3/08 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à une surcharge
• H02H 3/20 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un excès de tension

Abrégé

A fault display (2) for use in an electric power transmission line (6) ground fault automatic-locating device. The locating device comprises a signal source device (1) connected to a busbar side of a main transformer (5), several fault displays (2) respectively mounted to each phase bus at each node of each electric power transmission line (6), several overhead substations (3) respectively arranged at each node of each electric power transmission line (6), and a central information processing system (4). The signal source device (1) feeds back to the busbar side of the main transformer (5) a pulsating current signal. The fault display (2) comprises an electromagnetic induction device (21) for use in receiving the pulsated current signal, a detection control module (22) connected to the electromagnetic induction device (21), and an antenna communication device (23) connected to the detection control module (22) and for use in communicating with the overhead substations (3). The fault display (2) reduces the number and types of transmission line devices, thus obviating re-development works for the detection device in the fault automatic-locating device, and conserving costs.

Classes IPC  ?

• G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux

Abrégé

An electric power transmission line (6) ground fault automatic-locating device. The electric power transmission line (6) is connected to an outlet side of a substation main transformer (5). Each electric power transmission line (6) is constituted by three phase buses, and each electric power transmission line (6) has arranged thereon several nodes. The locating device comprises: a signal source device (1) connected to a busbar side of the main transformer (5), several fault displays (2) respectively mounted on each phase bus at each node of each electric power transmission line (6), several overhead substations (3) respectively arranged at each node of each electric power transmission line (6), and a central information processing system (4).

Classes IPC  ?

• G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
• G08C 17/02 - Dispositions pour transmettre des signaux caractérisées par l'utilisation d'une voie électrique sans fil utilisant une voie radio

Abrégé

A single power feed 10 kV power distribution apparatus. The apparatus comprises an line-in insulation cabinet (1), a power metering cabinet (2), a voltage-transforming lightning arrester cabinet (3), an line-out cabinet (4), a first high voltage busbar (5) arranged between the line-in insulation cabinet and the power metering cabinet, a second high voltage busbar (6) arranged between the voltage-transforming lightning arrester cabinet and the line-out cabinet, an line-in circuit arranged within the line-in insulation cabinet and connected to the first high voltage busbar, a metering circuit arranged within the power metering cabinet and connected to the first high voltage busbar, a voltage-transforming lightning arrester circuit arranged within the voltage-transforming lightning arrester cabinet and connected to the second high voltage busbar, and an line-out circuit arranged within the line-out cabinet and connected to the second high voltage busbar. The single power feed 10 kV power distribution apparatus is structurally simple, convenient to operate and to maintain, highly efficient, safe and reliable, environmentally friendly, and resource conserving.

Classes IPC  ?

• H02B 7/06 - Postes de transformation pour la distribution, p. ex. pour réseau urbain
• H02B 1/20 - Schémas de barres omnibus ou d'autres fileries, p. ex. dans des armoires, dans les stations de commutation
• H02B 1/24 - Circuits pour tableaux ou stations de commutation

Abrégé

A single power feed 10 kV power distribution apparatus. The apparatus comprises an line-in insulation cabinet (1), a power metering cabinet (2), a voltage-transforming lightning arrester cabinet (3), an line-out cabinet (4), a first high voltage busbar (5) arranged between the line-in insulation cabinet and the power metering cabinet, a second high voltage busbar (6) arranged between the voltage-transforming lightning arrester cabinet and the line-out cabinet, an line-in circuit arranged within the line-in insulation cabinet and connected to the first high voltage busbar, a metering circuit arranged within the power metering cabinet and connected to the first high voltage busbar, a voltage-transforming lightning arrester circuit arranged within the voltage-transforming lightning arrester cabinet and connected to the second high voltage busbar, and an line-out circuit arranged within the line-out cabinet and connected to the second high voltage busbar. The single power feed 10 kV power distribution apparatus is structurally simple, convenient to operate and to maintain, highly efficient, safe and reliable, environmentally friendly, and resource conserving.

Classes IPC  ?

• H02B 7/06 - Postes de transformation pour la distribution, p. ex. pour réseau urbain
• H02B 1/20 - Schémas de barres omnibus ou d'autres fileries, p. ex. dans des armoires, dans les stations de commutation
• H02B 1/24 - Circuits pour tableaux ou stations de commutation

Abrégé

Provided is a nickel-metal hydride battery energy storage monitoring system. The system comprises a battery energy storage monitoring system (1),a nickel-metal hydride battery energy storage monitoring unit (2), a battery management system (4), and a power conversion system (3). The nickel-metal hydride battery energy storage monitoring unit (2) is in network connection with the battery energy storage monitoring system (1), the battery management system (4) is connected to the nickel-metal hydride battery energy storage monitoring unit (2) through a field bus, and the power conversion system (3) is connected to the nickel-metal hydride battery energy storage monitoring unit (2) through a serial port. Through the nickel-metal hydride battery energy storage monitoring system (1) of the present invention, the power management department can master various battery energy storage data and information such as the battery energy storage quantity, the battery charging and discharging capability, and the power grid load in time, so as to process and analyze the information, form a control strategy, issue various charging and discharging control commands in time, transfer electric energy to the power grid during the power grid load peak, and implement peak load shifting, thereby obtaining economic benefits. Moreover, the nickel-metal hydride battery energy storage monitoring system may provide a basis for performing medium-term and long-term macroscopic management, planning, and dispatching for the decision maker.

Classes IPC  ?

• H01M 10/42 - Procédés ou dispositions pour assurer le fonctionnement ou l'entretien des éléments secondaires ou des demi-éléments secondaires
• H02J 3/32 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie utilisant des batteries avec moyens de conversion

Abrégé

An electric energy counting and measuring system and a detecting method thereof are provided. The electric energy counting and measuring system includes a counting management system (101), some counting management units (102), and some counting terminals (103). The counting management system (101) is connected with counting management units (102) via network interface for transmitting bidirectional data. The counting management units (102) are connected with counting terminals (103) via bus for transmitting bidirectional data. The electric energy counting and measuring system and detecting method thereof can accurately measure the electric energy in real time.

Classes IPC  ?

• G01R 22/00 - Dispositions pour la mesure de l'intégrale dans le temps d'une puissance électrique ou d'un courant, p. ex. compteurs d'électricité
• G08C 19/00 - Systèmes de transmission de signaux électriques

Abrégé

A test signal input terminal for searching extra-high voltage cable fault point of universal type GIS equipment, comprises a cable terminal hand hole (5) of the GIS equipment and an external cable conductor (3) inside a GIS equipment shell (1), wherein the cable terminal hand hole (5) is provided with a hand hole sealing plate (7), an insulated sealing plate base (8), an insulated sealing plate (9) and an input terminal conductor (10). A first through hole (17) is disposed on the hand hole sealing plate (7), and a second through hole (18) is disposed on the insulated sealing plate base (8). A section of elastic connecting electric conductor (11) is arranged between the external cable conductor(3) one end of the cable terminal hand hole(5) passing through the second and first through hole (18, 17) to extend into the cable terminal hand hole (5). And a first sealing structure and a second sealing structure (13, 14) are arranged between the cable terminal hand hole (5) and the hand hole sealing plate (7), and between the insulated sealing plate base (8) and an input terminal insulated sealing plate (9). The input terminal solves the problems of the signal input terminal in respect of insulated seal and high voltage insulation, and can be applied to the test/maintenance field of various GIS equipment extra-high voltage cables.

Classes IPC  ?

• G01R 31/02 - Essai des appareils, des lignes ou des composants électriques pour y déceler la présence de courts-circuits, de discontinuités, de fuites ou de connexions incorrectes de lignes

Abrégé

A method for detecting a transformer winding state utilizing vibration waveform. The transformer winding is regarded as one mechanical system, mechanical properties of which would change when the winding is loosening and deforming. The loosening and deforming of the transformer winding can be detected with higher sensitivity by detecting mechanical corresponding properties of the transformer winding under impact current.

Classes IPC  ?

• G01R 31/06 - Essai de bobinage électrique, p.ex. pour déterminer la polarité
• G01R 31/00 - Dispositions pour tester les propriétés électriquesDispositions pour la localisation des pannes électriquesDispositions pour tests électriques caractérisées par ce qui est testé, non prévues ailleurs

Abrégé

A system and method for detecting the state of the transformer winding are provided by utilizing excitation of the constant current sweep frequency power source. The method includes the following steps: the measuring and controlling and analyzing module controls the sweep frequency power source to apply outputted constant current and sweep frequency exciting signal on high voltage side of the measuring transformer from an excitation transformer; the vibration transducer measures the vibration response signal of the measuring transformer under different exciting frequency; the vibration signal sampler samples and pre-processes the measured signal from the vibration transducer; the measuring and controlling and analyzing module perform frequency spectral analysis on the received vibration signal which is after-treatment; the resonance frequency curve of the transformer winding in frequency domain is displayed and recorded, and compared with the resonance frequency curve measured and recorded previously and the vibration frequency curve of three phase coils of the transformer to judge the state of the transformer winding.

Classes IPC  ?

• G01R 31/06 - Essai de bobinage électrique, p.ex. pour déterminer la polarité
• G01R 31/00 - Dispositions pour tester les propriétés électriquesDispositions pour la localisation des pannes électriquesDispositions pour tests électriques caractérisées par ce qui est testé, non prévues ailleurs
• G01R 29/20 - Mesure du nombre de spiresMesure du rapport de transformation ou du facteur de couplage de bobinages

Abrégé

A cooling system of an oil-immersed transformer comprises several heat exchangers (2) and several condensing devices (3). The heat exchangers comprise oil-loop portions and evaporation cooling medium portions. The respective liquid medium in the oil-loop portions and the evaporation cooling medium portions doesn't contact and mix each other. The condensing devices are connected to the evaporation cooling medium portions of the heat exchangers. A cooling method of an oil-immersed transformer involves transmitting heat to a liquid evaporation cooling medium with lower temperature by oil of an oil-immersed transformer, where the cooling medium is a single evaporation cooling medium, or mixed medium of two or more than two kinds of evaporation cooling mediums. A gaseous evaporation cooling medium is condensed into the liquid evaporation cooling medium through a condensing tune and a condensing device. The liquid evaporation cooling medium is inversely passed to the heat exchanger.

Classes IPC  ?

• H01F 27/10 - Refroidissement par liquide