58 results about "Power system restoration" patented technology

The invention relates to an operation and safety monitoring simulation system for a power system, which comprises a power system full digital real-time simulation subsystem used for simulating the operation of a large-scale power system in real time and providing simulation data to other subsystems, a power market simulation subsystem used for simulating and training power market transaction, a PMU / WAMS subsystem used for carrying out real-time dynamic monitoring and analysis on a simulated power system, an SCADA / EMS subsystem used for monitoring and analyzing the simulated power system, a fault information management subsystem used for managing and comprehensively utilizing fault information, a power system dynamic safety assessment and early warning subsystem used for carrying out safety assessment and early warning on the current power system and carrying out safety verification on the operation mode of a future plan, a safety and stability control system performance test subsystem used for testing the performance of a protective relay device, a power system stabilizer (PSS) and other automated equipment as well as a safety and stability control system and equipment, a power system fault diagnosis subsystem used for carrying out on-line diagnosis and intelligent safety alarming on the fault of the simulated power system and providing a dispatching control decision under the fault condition, and a power system recovery control subsystem used for recognizing the state of the fault of the simulated power system, searching and inferring the power supply path of an outage region and providing a power grid recovery control strategy. The system can simulate the operation of a large-scale power grid in real time, and can be used for searching and comprehensively testing the technology and software of various power systems in dispatching, operation, control and other aspects.

Techniques for power outage management and power support restoration for devices in a wireless network are disclosed herein. Such a wireless network may include a number of bi-directional nodes in bi-directional wireless communication with one or more central nodes. Each bi-directional node may have a wireless communication path to one of the central nodes that is either a direct path or an indirect path through one or more intermediate bi-directional nodes serving as relays. Each bi-directional node may be configured to detect when it has become stranded such that it can no longer communicate with its assigned central node via its assigned communication path, to determine a reason for its stranding, and to transmit a stranding notification and the reason therefore.

A method of forecasting loads on a distribution network is disclosed. The method employs load profiles in combination with short-term load estimations to forecast expected loads on a distribution network. The predicted loads may then be used by power restoration controllers when performing back-feed capacity checks.

The invention discloses a multi-space-time navigating power system restoration decision support system and a restoration decision method. The system comprises a man-machine conversation layer being responsible for related display of a restorationdecision and the man-machine interactive operation, an interface adapting layer being responsible for interfacing withEMS and receiving power grid data, a data access layer used for providing underlying data support for a field service layer, and a modeling maintenance layer used for customizing and drawing various charts, wherein the interface adapting layer and the field service layer are connected with the man-machine conversation layer through network communication buses, the field service layer is connected with the data access layer, and the data access layer is connected with the modeling maintenance layer. The system and the method have the advantages that the efficiency and the success rate of power system restoration are improved, the whole-process covering on the restoration decision and the continuous online monitoring on the restoration process are realized, a dispatcher training simulation function is integrated, and the system and the method are applicable to the related power system restoration operation training.

A power outage restoration system manages a power network including a plurality of switching devices. The power outage restoration system includes an outage management system having a network model of said power network. A plurality of local restoration controllers are in communication with the outage management system and each said local restoration controller includes a trimmed network model correlating to a respective area of responsibility.

A robust power restoration method is described. The method involves establishing a set of virtual paths within a mesh network having at least two sources of electrical power. Each of the virtual paths is used to determine a suitable location for a non-conducting electrical bridge. When a fault is detected within the network, the state of the electrical bridges is modified to restore power.

A method for determining / dimensioning measures for restoring an electrical power system, which experiences or is heading for a voltage instability, to a steady-state condition, wherein there is no immediate risk of instability. An actual voltage / phase angle in the electrical power system is determined. The power unbalance within at least one sub-area in the electrical power system is determined. Suitable power-balancing measures are determined. The extent of the respective measures is determined. The power-balancing measures are carried out. Also, a device for carrying out the method.

Techniques for power outage management and power support restoration for devices in a wireless network are disclosed herein. Such a wireless network may include a number of bi-directional nodes in bi-directional wireless communication with one or more central nodes. Each bi-directional node may have a wireless communication path to one of the central nodes that is either a direct path or an indirect path through one or more intermediate bi-directional nodes serving as relays. Each bi-directional node may be configured to detect when it has become stranded such that it can no longer communicate with its assigned central node via its assigned communication path, to determine a reason for its stranding, and to transmit a stranding notification and the reason therefore.

The invention relates to an active repairing method based on data processing of a smart meter, and belongs to the technical field of performing power outage judgment and actively repairing after a power outage event of a distribution network device occurs. Through interference filtering of power outage data of the smart meter, analysis and processing of short-term power outage running time, call study and judgment, etc., the study and judgment information on power outage is obtained to provide decision support for power supply service work, and power restoration as well as customer inform areactively arranged in advance if the customer does not report repairs to realize active repairs. The method provided by the invention ensures the availability of the function of power outage study andjudgment and active repair. With the help of the statistical analysis of the number of stations and lines in the power outage study and judgment and active repairing system, the weakened links of thepower outage-prone stations and lines are treated in a targeted manner, which effectively improves the reliability of equipment and the quality of power supply services.

The invention relates to the technical field of power system restoration, and provides a power system restoration force calculation method and a system based on a black start and a load restoration process. The method comprises the following steps: identifying the state of the power system, obtaining the basic data for calculating the power system, and establishing a network connection matrix M corresponding to the system; Screening out the power plants of the available black-start units in the system, calculating the sum of the weighted capacities of all the available black-start units in each power plant and the corresponding standard values; generating a minimum spanning tree T1 containing all recoverable plant nodes, and calculating an average shortest distance D1 and an average shortest distance D2; calculating an average value D of D1 and D2; the ratio of standard value 1 to D of the weighted sum of the black-start unit capacity is calculated, which provides a quantitative methodfor evaluating and analyzing the restoring force of the power system after a large blackout accident on the basis of fully considering the black-start and load restoring process.

The embodiment of the invention provides a calculation method for generator set output in electric system recovery. The calculation method for the generator set output in the electric system recovery mainly comprises the steps that aiming at the charging subsystem formed by recovered parts in power grids, a new generator set needing to be recovered closest to the charging subsystem is searched out based on a search algorithm, and the new generator set and the charging subsystem form the whole charging system; the whole charging system is started, the minimum regulating variable of the generator active output in the whole charging system is taken as the target, and optimal active output of each generator set in the whole charging system is calculated. The calculation method for the generator set output in the electric system recovery can effectively calculate the optimal active output of each generator set in the whole charging system, the regulating time can be shortened, and the total process of the electric system recovery is accelerated. The embodiment of the calculation method for the generator set output in the electric system recovery is simple in algorithm, and compared with a traditional method, the system recovery efficiency can be improved remarkably.

The present invention relates to a method for calculating the grid reconfiguration efficiency in a power system restoration process. The technical features of the grid system include: reading the data of the power system after a large power outage; calculating the accumulated generation capacity of the generator set so that the capacity is used to evaluate a unit recovery efficiency; calculating the cumulative economic loss on the load side to evaluate the load recovery efficiency; normalizing and processing the cumulative generation capacity on the generating unit side and cumulative economic loss on the load side; using the linear summation method to process the normalized cumulative generation capacity and cumulative economy loss as the grid reconstruction efficiency; and according to the efficiency of different power system grid reconstruction schemes, selecting the appropriate grid reconstruction scheme. The method of the invention is reasonably designed and can make comprehensive and reasonable evaluations on different grid reconstruction schemes to provide a decision basis for power system recovery so as to be able to better guide the power system recovery process.

The invention relates to a network reconfiguration system (Failure Detection, Isolation, and Recovery FDIR) based on CC-2000, belonging to the field of automatic control on electrical power systems. The network reconfiguration system comprises an electrical power system fault diagnosis module, an electric power system recovery control module, a data input and output module, a human-computer interface display module and a network reconfiguration database. The network reconfiguration system is characterized in that the electrical power system fault diagnosis module is used for analyzing a collected telecommanded and telemetered signal and diagnosing a fault; the electric power system recovery control module is used for taking a control strategy for the diagnosed fault; and the data input and output module is used for issuing a control instruction to the electrical power system so that the electrical power system rapidly recovers to supply power. By adopting a shortest path searching method of combining breadth-first and depth-first, rapid recovery for electric power shutdown load is realized through protection action.

The invention discloses a sequential recovery method and device for a power system based on deep reinforcement learning. The method comprises the following steps: constructing a power system recovery model which comprises a deep reinforcement learning Q value estimation network and a Target Q network, and training the power system recovery model. According to the invention, based on the power network after a cascade failure and through a bus recovery sequence obtained after deep reinforcement learning, the recovery capability of the power network system to the cascade failure in a system recovery process is evaluated, reinforcement learning is combined with the power network, and the recovery problem of the power network is considered from the perspective of defenders; and through combination with a neural network, the implementation range of the power network is expanded; that is, an optimal recovery strategy of a large power grid can be found.

The invention discloses a new energy power system restoration path search method based on improved network weights: calculate the weight factors of lines, generator nodes and substation nodes, and use them as the basis for selecting lines and nodes in the path search process; based on the nodes to be restored Type, determine the value of the corresponding coefficients of various node weight factors, and calculate the combined weight of nodes to be restored; analyze the requirements of new energy and load access systems, and study the constraints of new energy node restoration and power balance; propose a consideration The improved node combination weights affected by adjacent unrecovered generator nodes increase the chance of generator nodes being searched and speed up the recovery of generator nodes; finally, combined with the proposed improved node combination weights, a breadth-first path search model is established. In the case of the ability to accept new energy in the process of system recovery, the orderly recovery of the new energy power system can be realized.

The invention provides a partitioning scheme optimizing method and device for power system restoration after blackout, and relates to the technical field of power systems. The method comprises the following steps: establishing a first optimizing model on the basis of the target strategy of fewest connecting lines between subsystems in a power grid and pre-established electrical characteristic constraint conditions of the power grid; solving the first optimizing model based on a preset solver to obtain a first partitioning scheme; processing the first optimizing model based on cutting constraint conditions to obtain a second optimizing model; solving the second optimizing model based on the solver to obtain a second partitioning scheme; evaluating the first partitioning scheme and the second partitioning scheme respectively according to established evaluation indexes to obtain evaluation results of the first partitioning scheme and the second partitioning scheme so as to determine a main partitioning scheme and a standby partitioning scheme from the partitioning schemes on the basis of the evaluation results. Therefore, restoration time after power grid faults can be shortened effectively, and high reliability of power grid restoration after the faults is guaranteed.