Abrégé

A source-network-load-storage coordination dispatching method in a background of a coupling of renewable energy sources, including: taking an expectation of a minimum grid operating cost in a dispatching cycle as an objective function; generating an approximate value function of an output of a set for generating electricity from renewable energy sources and a user load, and constructing a source-network-load-storage coordination dispatching model with combination of the objective function; obtaining forecast data of the output of a set for generating electricity from renewable energy sources and the user load, and inputting the forecast data into the dispatching model for solving; performing iterative updating on the approximate value function, importing the approximate value function after the iterative updating into the dispatching model for iterative solving, and terminating an iterative process until a solving result satisfies a preset convergence condition; and using a solving result of a last iteration as a dispatching strategy.

Classes IPC  ?

• H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
• H02J 3/46 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs contrôlant la répartition de puissance entre les générateurs, convertisseurs ou transformateurs

Abrégé

Disclosed are a photovoltaic energy storage offline coordination system and method based on demand management. The system includes a photovoltaic generator set, an inverter, a dispatch and control device for charge-discharge, a load monitor, a first and second energy storage device, and a remote console. The photovoltaic generator set is electrically connected to the dispatch and control device for charge-discharge via the inverter; the first energy storage device is connected to a load-side power supply bus via a first dispatch and control unit; the second energy storage device is connected to the load-side power supply bus via a third dispatch and control unit; a second dispatch and control unit is connected to the load-side power supply bus; the load monitor is provided at the load-side power supply bus, and configured to monitor a load of the load-side.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
• 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 are a net load forecasting method and apparatus for a new energy electric power market. The method includes: obtaining and performing data preprocessing on new energy output data and external environmental data, and extracting strongly correlated features from the new energy output data and the external environmental data after the data preprocessing; performing feature expansion on the strongly correlated features, and inputting the strongly correlated features after the feature expansion into a preconstructed regression forecasting model, to obtain a first forecast value; obtaining and performing data preprocessing on user load data and load influencing factor data, and inputting the user load data and the load influencing factor data after the data preprocessing into a FNN-LSTM hybrid model, to obtain a second forecast value; and calculating a difference between the second forecast value and the first forecast value, to obtain a net load forecasting result.

Classes IPC  ?

• H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
• G06Q 10/04 - Prévision ou optimisation spécialement adaptées à des fins administratives ou de gestion, p. ex. programmation linéaire ou "problème d’optimisation des stocks"
• G06Q 50/06 - Fourniture d’énergie ou d’eau

Abrégé

Disclosed is a multi-dimensional analysis method for a tripping risk of a whole transmission line due to a lightning shielding failure. A quantity of thunderstorm days, a tower size, a terrain proportion, an altitude, and insulation configuration data are collected for a transmission line for which a tripping risk due to a lightning shielding failure needs to be analyzed, and a striking distance, an exposure distance, a lightning resisting level of the line after altitude factor correction, and a lightning shielding failure risk of a single-base tower are calculated in turn. Characteristics of a lightning shielding failure under different nominal heights, quantities of thunderstorm days, and terrains are studied. Representative combination conditions are selected to calculate a tripping risk of a typical tower due to the lightning shielding failure. A weight coefficient is extracted, to calculate a tripping risk of the whole line due to the lightning shielding failure.

Classes IPC  ?

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

The present invention provides a method for source-grid-load-storage coordinated scheduling in a new energy coupling background, comprising: setting an expected minimum grid operation cost in a scheduling period as an objective function; generating an approximate value function of a new energy unit output and a user load, and constructing a coordinated source-grid-load-storage scheduling model in combination with the objective function; acquiring prediction data for the output of the new energy unit and the user load, inputting the prediction data into the scheduling model for a solution; iteratively updating the approximation function, entering the iteratively updated approximation function into the scheduling model for iterative solution, and stopping iteration when the solution result meets a preset convergence condition; and using the solution result of the last iteration as a scheduling strategy for the output of the new energy unit and the user load. By means of using approximate dynamic programming techniques, performing time-segmented approximate dynamic programming of scheduling on the basis of a value function eliminates the calculation of an expected value in existing scheduling models, effectively decreasing the impact of an uncertainty factor on the stability of a grid system.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

Provided in the present invention are a net load prediction method and apparatus for a new energy electric power market. The method comprises: acquiring new energy output data and a plurality of pieces of external environment data, performing data preprocessing on the new energy output data and the plurality of pieces of external environment data, and extracting strong correlation features from the new energy output data and the plurality of pieces of external environment data which have been subjected to data preprocessing; performing feature augmentation on the strong correlation features, and inputting, into a pre-constructed regression prediction model, the strong correlation features which have been subjected to feature augmentation, so as to obtain a first predicted value; acquiring user load data and a plurality of pieces of load influence factor data, performing data preprocessing on the user load data and the plurality of pieces of load influence factor data, and inputting, into an FNN-LSTM hybrid model, the user load data and the plurality of pieces of load influence factor data which have been subjected to data preprocessing, so as to obtain a second predicted value; and obtaining the difference between the second predicted value and the first predicted value, so as to obtain a net load prediction result. The present invention is applicable to net load prediction of a new energy electric power market. For different features of net load influence factors, different artificial intelligence algorithms are used for prediction, thereby breaking the information barrier between data and improving the net load prediction precision.

Classes IPC  ?

• G06Q 10/04 - Prévision ou optimisation spécialement adaptées à des fins administratives ou de gestion, p. ex. programmation linéaire ou "problème d’optimisation des stocks"

Abrégé

Disclosed in the present invention are a demand management-based optical storage offline coordination system and method. The system comprises a photovoltaic generator set, an inverter, a charging/discharging regulator, a load monitor, a first energy storage device, a second energy storage device and a remote console. The photovoltaic generator set is electrically connected to the charging/discharging regulator by means of the inverter. The first energy storage device is electrically connected to a power supply busbar on a load side by means of a first regulating unit in the charging/discharging regulator. The second energy storage device is connected to the power supply busbar on the load side by means of a second regulating unit in the charging/discharging regulator. A third regulating unit in the charging/discharging regulator is connected to the power supply busbar on the load side. The load monitor is disposed on the power supply busbar on the load side for monitoring the load of the load. The remote console, the load monitor, and the charging/discharging regulator are communicationally connected in pairs. In the solution, different regulating policies are selected for different load demand periods, and the transmission security of regulating instructions is ensured by opening a dedicated transmission channel for sending and receiving information.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
• H02J 3/32 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie utilisant des batteries avec moyens de conversion
• 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

A multi-dimensional analysis method for a whole-line lightning shielding failure tripping risk of a power transmission line, comprising: first collecting data of a thunderstorm day, tower size, terrain proportion, altitude and insulation configuration of a power transmission line that requires lightning shielding failure tripping risk analysis; and calculating in sequence strike distance and exposure distance, and correcting the line lightning resistance level of an altitude factor and a lightning shielding failure risk of a single-base tower. Lightning shielding failure characteristics when nominal height, lightning day, terrain and the like are different are researched on the basis of a calculation model, and a weak link in the whole line may be identified; and a representative combination condition is selected to calculate a typical tower lightning shielding failure tripping risk, and on the basis of a same-region whole-line terrain proportion and a tower use condition, a weight coefficient is extracted to calculate a whole-line lightning shielding failure tripping risk, and the whole-line lightning shielding failure tripping risk may be quickly analyzed by means of a weighted average of a typical combination, providing effective suggestions for the lightning protection of lines, and achieving relatively good accuracy and objectivity.

Classes IPC  ?

• G06Q 10/06 - Ressources, gestion de tâches, des ressources humaines ou de projetsPlanification d’entreprise ou d’organisationModélisation d’entreprise ou d’organisation

Abrégé

Disclosed are apparatus, electronic device, and method for stitching dual-camera images. The method includes collecting two images having overlapping photographic content. The method includes extracting and matching feature points of the two images. The method includes roughly aligning the two images by using a homography matrix. The method includes accurately aligning the two images by using a least squares method to complete stitching the two images.

Classes IPC  ?

• G06T 7/33 - Détermination des paramètres de transformation pour l'alignement des images, c.-à-d. recalage des images utilisant des procédés basés sur les caractéristiques
• G06T 3/60 - Rotation d’images entières ou de parties d'image
• H04N 23/698 - Commande des caméras ou des modules de caméras pour obtenir un champ de vision élargi, p. ex. pour la capture d'images panoramiques
• H04N 23/80 - Chaînes de traitement de la caméraLeurs composants

Abrégé

Provided are a ground fault protection method and apparatus for a photovoltaic station output transmission line. A circuit breaker on a photovoltaic side is controlled by a control element. Whether measured zero sequence impedance on the photovoltaic side of a segment line has a large variation before and after an action of power grid side distance protection is determined, the variation of the measured zero sequence impedance is inputted into the control element, in condition that the variation of the measured zero sequence impedance is less than a setting value, a tripping signal is outputted to the circuit breaker on the photovoltaic side to isolate the fault; and in condition that the variation of the measured zero sequence impedance is greater than the setting value, photovoltaic side distance protection is not started.

Classes IPC  ?

• H02H 7/00 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail
• H02H 7/22 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour appareillage de distribution, p. ex. système de barre omnibusCircuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour dispositifs de commutation
• H02H 3/16 - 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 courant de défaut à la terre ou à la masse
• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

A hierarchical control method for an island power grid energy storage system for increasing new energy generation fluctuation is disclosed. The method includes implementing a rolling dispatch method based on an idea of model predictive control; comprehensively considering a response capability of the energy storage system to grid-wide economic dispatch instructions and life loss of energy storage lithium batteries, and constructing an objective function of an intraday control model of the energy storage system with economic optimization; and constructing, on a basis of satisfying the objective function of the intraday control model, a real-time control model of the energy storage system and solving the model, and determining charge and discharge plans of a lithium battery energy storage system and a supercapacitor energy storage system.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
• G05B 13/04 - Systèmes de commande adaptatifs, c.-à-d. systèmes se réglant eux-mêmes automatiquement pour obtenir un rendement optimal suivant un critère prédéterminé électriques impliquant l'usage de modèles ou de simulateurs
• H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
• H02J 3/24 - Dispositions pour empêcher ou réduire les oscillations de puissance dans les réseaux
• H02J 3/32 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie utilisant des batteries avec moyens de conversion
• H02J 7/34 - Fonctionnement en parallèle, dans des réseaux, de batteries avec d'autres sources à courant continu, p. ex. batterie tampon

Abrégé

An island power grid energy storage system hierarchical control method for ameliorating new energy power generation fluctuation. The method comprises: implementing a rolling scheduling method on the basis of a model predictive control thought (11); comprehensively considering the response capability of an energy storage system to whole-network economic scheduling instructions and lifetime loss of an energy storage lithium battery, so as to construct an energy storage system intra-day control model target function with the optimal economy (12); and constructing an energy storage system real-time control model on the basis that the intra-day control model target function is satisfied and solving the model, and determining charging and discharging plans for a lithium battery energy storage system and a super-capacitor energy storage system (13). A hierarchical dynamic control method, based on model predictive control, for an energy storage system is provided. The method comprises an energy storage system intra-day scheduling method in response to whole-network economic scheduling and an energy storage system real-time control method for stabilizing new energy fluctuation, so as to obtain an accurate energy storage control scheme.

Classes IPC  ?

• H02J 3/28 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie

Abrégé

A power flow intelligent adjustment method based on a Q-Learning algorithm, comprising: step 1. converting a variable, an action, and a target in a power grid into a state, an action, and a reward in an algorithm, respectively; step 2. selecting an action from an action space, giving an immediate return according to a power flow calculation result, and correcting the next state; step 3. observing the next exploration action according to a strategy in the Q-Learning; step 4. updating a Q value of a corresponding position in a Q value table according to the obtained reward; step 5. if a final state is not reached, returning to step 2, and if the final state is reached, incrementing the number of iterations by one; step 6. if the number of iterations does not reach a set value K, i.e., Episode

Classes IPC  ?

• H02J 3/06 - Commande du transfert de puissance entre réseaux connectésCommande du partage de charge entre réseaux connectés

Abrégé

A 10 kV static load model parameter identification method based on similar daily load curves. The method comprises: on the basis of a large number of daily load response characteristic curves, according to a static load model structure and a constraint condition, and according to two basic assumptions about a load theory, proposing a static load model parameter full-period optimization identification model; by means of optimization solving, giving 10 kV load full-period static voltage model parameters, obtaining change rules of load active and reactive power at each time point with changes in voltage, and obtaining change rules of load components. The method has good applicability, is suitable for static model analysis of large-scale 10 kV loads, and meets actual requirements.

Classes IPC  ?

• G06Q 10/06 - Ressources, gestion de tâches, des ressources humaines ou de projetsPlanification d’entreprise ou d’organisationModélisation d’entreprise ou d’organisation

Abrégé

A dual camera image-based splicing method, comprising: acquiring two images having photographed contents that are overlapping (S101); performing feature point extraction and feature point matching on the two images (S102); roughly aligning the two images using a homography matrix (S103); and precisely aligning the two images using a least squares method, so as to complete the splicing of the two images (S104). Also disclosed is an apparatus corresponding to the method.

Classes IPC  ?

• G06T 7/33 - Détermination des paramètres de transformation pour l'alignement des images, c.-à-d. recalage des images utilisant des procédés basés sur les caractéristiques

Abrégé

Provided is an anti-islanding protection system. The system is applied to a low-voltage distributed generation resource (DGR) and includes a box, a reverse power protector, a protection module and an output controller. The reverse power protector has an end connected to a first current transformer and has another end connected to the output controller. The reverse power protector is configured to provide reverse power protection for the low-voltage DGR. The output controller has an end connected to the protection module and the reverse power protector and has another end connected to a grid-connection switch of the low-voltage DGR. The output controller is configured to control the grid-connection switch to turn off when reserve power is detected. The protection module has an end connected to a second current transformer and has another end connected to the output controller. The protection module is configured to provide low-frequency protection, over-frequency protection, over-voltage protection and low-voltage protection for the low-voltage DGR.

Classes IPC  ?

• H02J 7/22 - Régulation du courant ou de la tension de charge par variation de champ due à la variation du rapport d'interruption et de rétablissement des contacts travaillant par intermittence, p. ex. utilisant un régulateur Tirrill
• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
• H02B 1/28 - EnveloppesLeurs parties constitutives ou accessoires à cet effet étanches à la poussière, aux projections, aux éclaboussures, à l'eau ou aux flammes
• H02B 1/46 - BoîtiersParties constitutives ou accessoires
• H02H 7/22 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour appareillage de distribution, p. ex. système de barre omnibusCircuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour dispositifs de commutation

Abrégé

Disclosed is a protection method for a ground fault of an outgoing line of a photovoltaic power station, belonging to the technical field of power system relay protection. A breaker on a photovoltaic side is controlled by a control element; zero sequence measurement impedances on the photovoltaic side before and after a power grid side distance protection action of a section of a line are compared to determine whether there is a relatively great variation, and this zero sequence measurement impedance variation is input to the control element; where the zero sequence measurement impedance variation is less than a setting valve, a tripping signal is output to the breaker on the photovoltaic side, so that fault isolation is completed; and where the zero sequence measurement impedance variation is greater than the setting valve, photovoltaic side distance protection is not enabled. The other stages of lines still employ traditional distance protection, and carry out fault isolation quickly when a fault occurs.

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

Abrégé

The present application relates to an anti-islanding protection system, which is applied to a low-voltage distributed power source, and comprises a box body, a reverse power protector, a protection module and an output controller. One end of the reverse power protector is connected to a first current transformer, and the other end is connected to the output controller, and the reverse power protector is configured to provide reverse power protection to the low-voltage distributed power source. One end of the output controller is connected to the protection module and the reverse power protector, and the other end is connected to a grid-connected switch of the low-voltage distributed power source, and the output controller is configured to control said grid-connected switch to disconnect a connection when power reversal is detected. One end of the protection module is connected to a second current transformer, and the other end is connected to the output controller, and the protection module is configured to provide under frequency, over frequency, over voltage and under voltage protection to the low-voltage distributed power source.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
• H02B 1/46 - BoîtiersParties constitutives ou accessoires