Strategy of "Source-Storage-Load" Multi-Operating Domain Coordinated Control to Enhance Clean Energy Consumption Capacity

Abstract

Clean energy power generation has randomness and volatility. In order to ensure the safe and stable operation of power grid, it is necessary to improve the flexible regulation ability of power grid, so as to improve the consumption ability of clean energy. This paper studies the relationship between power grid peak shaving margin, multi-source regulation limit and abandoning wind, nuclear and solar. In order to reduce the abandoned wind electricity and photovoltaic electricity, a coordinated dispatching strategy for power grids with multiple-source and multi-domain is proposed. This strategy incorporates battery energy storage and electric thermal storage control into the AGC control system. The power grid adopts different control strategies in different operation periods, so as to maximize the flexible regulation capacity. Based on the actual data of 3 typical operating days, this paper gives specific measures for power grid peak shaving in different control domains. The numerical results verify the role of electric thermal storage and battery energy storage in improving clean energy consumption. In addition, the actual operation results of this strategy in the power grid for 5 consecutive years show that the abandoned wind power rate of the Liaoning power grid has been continuously reduced. The abandoned wind power rate has dropped from 13% in 2016 to less than 1% for recent 3 consecutive years. The proposed control strategy has a significant effect on improving the power grid's ability to absorb clean energy.