• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

ELECTRIC POWER CONSTRUCTION ›› 2022, Vol. 43 ›› Issue (11): 42-52.doi: 10.12204/j.issn.1000-7229.2022.11.005

• Research and Application of Key Technologies for Distribution Network Planning and Operation Optimization under New Energy Power Systems •Hosted by Professor WANG Shouxiang and Dr. ZHAO Qianyu• • Previous Articles     Next Articles

Divisional and Hierarchical Voltage Regulation Strategy Based on HEM Sensitivity for Distribution Network

CHEN Wenjin1(), GAN Wen2(), ZHANG Jun1(), YANG Meng3(), SUN Longxiang2(), LIU Haoming3()   

  1. 1. State Grid Zhejiang Electric Power Company, Hangzhou 310007, China
    2. State Grid Huzhou Electric Power Supply Company, Huzhou 313001, Zhejiang Province, China
    3. College of Energy and Electrical Engineering,Hohai University, Nanjing 211100, China
  • Received:2022-04-18 Online:2022-11-01 Published:2022-11-03
  • Contact: GAN Wen E-mail:605714917@qq.com;94236589@qq.com;zhang-jun@zj.sgcc.com.cn;15850696216@163.com;1542854907@qq.com;liuhaom@hhu.edu.cn
  • Supported by:
    State Grid Zhejiang Electric Power Co., Ltd. Research Program(5211UZ2000K4)

Abstract:

With the increasing integration of PV, the peak and valley of the source and the load are inconsistent in the distribution networks, and the PV generation is intermittent and fluctuating. These characteristics have brought about the problem of overvoltage. This paper proposes a divisional and hierarchical voltage regulation model based on the sensitivity analysis of holomorphic embedding method (HEM). First, the reactive-power output model for energy storage and PV are established, and the voltage sensitivity matrix of distribution network based on HEM is derived. A network partition method is further studied using sensitivity matrix. Then, a two-layer voltage optimization strategy is proposed. The upper-level model dispatches the grid-connected energy storage, PV and volt-var regulating equipment to regulate the voltage in the entire network. The lower-level voltage regulation model further explores the reactive power potential of small grid-connected distributed PV and energy storage to adjust the voltage in each region according to the voltage sensitivity. Finally, the proposed strategy is simulated on a 35kV distribution network. The simulation verified that the proposed sensitivity calculation method is applicable and the voltage regulation strategy is efficient in solving the voltage problem.

Key words: holomorphic embedding method (HEM), voltage sensitivity, distribution network partition, voltage regulation

CLC Number: