Active distribution network demand response control method based on hierarchical energy storage

Abstract

The invention relates to an active distribution network demand response control method based on hierarchical energy storage. The method comprises a same layer source-storage coordinated response strategy, a cross layer storage-storage coordinated response strategy, a same layer source-storage-charge coordinated response strategy and a cross layer source-storage-charge coordinated response strategy. The same layer source-storage coordinated response strategy is used for onsite smoothing distributed energy network access real-time power fluctuation. The cross layer storage-storage coordinated response strategy solves the problem fed back by the present layer by authorizing to the energy storage system in the previous layer of power grid and aims at enhancing the consumption capacity of the distributed power supplies. The same layer source-storage-charge coordinated response strategy and the cross layer source-storage-charge coordinated response strategy perform optimization control according to the priority of maximizing consumption distributed power generation, load power supply and energy storage economic operation. The energy storage system is hierarchically accessed to the distribution network so that the characteristics of energy storage can be fully exerted and the economic performance of its application can be enhanced, and scale application of energy storage in the electric power system can be facilitated.

Description

technical field [0001] The invention relates to a demand response control method of an active distribution network based on hierarchical energy storage. Background technique [0002] Demand response (DR) is to make power users respond through price signals or incentive mechanisms, and the resulting changes in load characteristics meet the operating requirements of the power system. The implementation of demand response is conducive to strengthening the rationality and reliability of power supply and promoting the optimal allocation of power resources. To carry out demand response, electrical equipment can be used to automatically track changes in the power system, which not only helps to ensure the security of the power grid, but also facilitates the consumption of large-scale clean energy. The driving force for popularization and application in the environment is not enough. In addition, the implementation of demand response requires the establishment of a support system t...

AI Technical Summary

Problems solved by technology

To carry out demand response, electrical equipment can be used to automatically track changes in the power system, which not only helps to ensure the security of the power grid, but also facilitates the consumption of large-scale clean energy. The driving force for popularization and application in the environment is not enough. In addition, the implementation of demand response requires the establishment of a support system to improve the flexibility and efficiency of demand response. The key to the demand response system is responsiveness, which means that responding participants change their own electricity consumption behavior and adjust electricity consumption. The capacity of load and related equipment, including response strength and response time, involves high construction costs and problems of response time lag, under-response and over-response

[0003] Energy storage access has changed the characteristics of the power system's "use immediately" and made the power system more flexible, which can effectively improve the safety, economy, and flexibility of power grid operation; the flexible and controllable output of energy storage can participate in demand response. It is beneficial to improve the response speed and increase the flexibility of the response, which is conducive to the safe operation of the power grid and the consumption of distributed power sources. However, the economics of the current energy storage technology cannot fully meet the needs of the power system. It is necessary to choose a reasonable connection according to the functional positioning. It is necessary to propose an efficient and economical operation control strategy, which can not only give full play to the characteristics of energy storage, but also improve the economy of application, and promote the large-scale application of energy storage in power systems.

[0004] At present, power grid companies, power generation companies, and users are all aware of the application prospects of energy storage technology in the power system, but there are still certain difficulties in popularization and application. First, the cost of large-capacity energy storage is still too high. Second, supporting policies are not clear enough. Third, the management mechanism needs to be improved; therefore, optimizing the application of energy storage in the power system to improve economic efficiency is conducive to promoting the development of the energy storage industry

[0005] Moreover, the existing power system and demand response control strategies cannot effectively realize demand response control, which may easily cause power fluctuations in the power grid and affect the reliable operation of the power grid.

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