Title: Layered energy balance control method for renewable energy grid based on island mode

Authors: Yao Li; Hui Liu; Wei Xia; Yanwu Ruan; Xiaochuan Guo

Addresses: Hubei Power Grid Intelligent Control and Equipment Engineering Technology Research Center, Hubei University of Technology, Wuhan, Hubei 430068, China; DC Company of State Grid Hubei Electric Power Co., Ltd., Yichang, Hubei 443000, China ' Hubei Power Grid Intelligent Control and Equipment Engineering Technology Research Center, Hubei University of Technology, Wuhan, Hubei 430068, China ' State Grid Hubei Electric Power Co., Ltd., Xiaogan Power Supply Company, Hubei, Xiaogan 432100, China ' DC Company of State Grid Hubei Electric Power Co., Ltd., Yichang, Hubei 443000, China ' DC Company of State Grid Hubei Electric Power Co., Ltd., Yichang, Hubei 443000, China

Abstract: In order to improve load balance and energy efficiency of renewable energy grid, this study designed a layered energy balance control method based on island mode. Firstly, the operation characteristics of renewable energy grid in island mode are analysed, and then the energy balance control of renewable energy grid is divided into three layers, namely, renewable energy output control, grid reactive power control and grid voltage control. The experimental results show that the load waveform of bus voltage tends to be stable after a short abnormal change in the early stage, and the voltage stabilises around 220 kV after 6 s. The maximum renewable energy utilisation rate can reach 95%, indicating that the proposed method achieves the design expectation.

Keywords: island mode; renewable energy grid; energy control; layered control; voltage load; energy efficiency.

DOI: 10.1504/IJGEI.2023.132021

International Journal of Global Energy Issues, 2023 Vol.45 No.4/5, pp.461 - 473

Received: 22 Apr 2022
Accepted: 27 Jul 2022
Published online: 06 Jul 2023 *

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