Method and system for stabilizing distributed energy source power fluctuation based on temperature and power control

Abstract

The invention belongs to the hybrid energy storage technology field and relates to a method and system for stabilizing distributed energy source power fluctuation based on temperature and power control. According to the method, a variable filtering time coefficient is adjusted through fuzzy control and based on a real-time operation state of a heat pump and real-time charge states of a super capacitor and a storage cell; generation fluctuation power is distributed among the heat pump, the super capacitor and the storage cell through temperature and power control, and low frequency and medium high frequency components in power fluctuation can be respectively stabilized. The method is advantaged in that hybrid energy storage investment cost is reduced, service life of the storage cell is prolonged, system reliability and economic benefits are improved, and heat pump output components can be corrected through temperature control to satisfy comfort level requirements of users.

Description

technical field [0001] The present invention relates to a technology in the field of hybrid energy storage, in particular to a method and system for stabilizing distributed energy power fluctuations based on temperature and power control. Background technique [0002] In the current power system, the concept of distributed power supply is gradually emerging, and its application is becoming more and more extensive. Renewable energy such as wind energy and solar energy in distributed power generation has the characteristics of randomness, intermittency and volatility, which will cause instantaneous power fluctuations in the relevant power grid lines. If the power fluctuations are not smoothed, it will cause power generation systems to appear Low reliability, poor stability and other issues. [0003] In order to stabilize the power fluctuations of distributed power sources, hybrid energy storage systems based on supercapacitors and batteries are usually used for energy storage...

AI Technical Summary

Problems solved by technology

Renewable energy such as wind energy and solar energy in distributed power generation has the characteristics of randomness, intermittency and volatility, which will cause instantaneous power fluctuations in the relevant grid lines. If the power fluctuations are not smoothed, it will cause power generation systems to appear Low reliability, poor stability and other issues

[0003] In order to stabilize the power fluctuations of distributed power sources, hybrid energy storage systems based on supercapacitors and batteries are usually used for energy storage. However, the current hybrid energy storage systems have high investment costs and cannot bring economic benefits; while heat pump-based The demand side load seldom considers the specific load operating characteristics, which greatly affects the suppression effect of power fluctuations

[0004] In addition, the current energy supply systems such as heating power grids and power grids generally have the characteristics of independent design, planning, and respective operation. There is a lack of interaction and coordination between energy grids, and it is difficult to give full play to the advantages of energy coupling complementarity and cascaded utilization at the multi-energy supply level.

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