Joint optimization of active/reactive power for hybrid island power grids with weak AC system and VSC-MTDC

被引：0

作者：

Wang X. ^{[1
]}

Li S. ^{[1
]}

Zhong Y. ^{[2
]}

Li C. ^{[2
]}

Lu D. ^{[2
]}

Jia K. ^{[3
]}

Liu D. ^{[4
]}

Shi F. ^{[1
]}

机构：

[1] Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University, Jinan

[2] Zhoushan Power Supply Company of State Grid Zhejiang Electric Power Co., Ltd., Zhoushan

[3] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing

[4] State Grid Economic and Technological Research Institute Co., Ltd., Beijing

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2020年 / 40卷 / 04期

关键词：

AC/DC hybrid power grid; Active/reactive power joint optimization; Genetic algorithm; Island power grid; Multi-objective optimization; VSC-MTDC;

D O I：

10.16081/j.epae.202004005

中图分类号：

学科分类号：

摘要：

The traditional island AC grids are usually weak and faced with some inherent challenges such as the large reactive power imposed by AC submarine cables, the small stability margin, the short device service-life due to frequent switching, and so on. As VSC-MTDC(Voltage Source Converter based Multi-Terminal Direct Current) system fulfills the supply demands of islands in a better way, the AC/VSC-MTDC hybrid power grid tends to be the popular choice in island. Since the transmission characteristics of active and reactive power in the weak AC island power grids correlating with each other, the voltage amplitude difference is not only relevant to reactive power, while the phase angle difference is not only related to real power. An active/reactive power joint optimization strategy is proposed. It controls the VSC outputs to coordinate the controlled outputs from VSC-MTDC with the measures of AC networks in parallel. A multi-objective optimization model solvable by GA(Genetic Algorithm) is established, which considers the system loss, the switching costs of devices and the stability margin. In line with the concerned issues in island power grids, the proposed optimization strategy is validated by the simulation case of ±200 kV five-terminal flexible DC demonstration project in Zhoushan, Zhejiang. The results confirm the advantages of the joint optimization over the sole strategy based on either active or reactive power. © 2020, Electric Power Automation Equipment Press. All right reserved.

引用

页码：132 / 137and184

共 19 条

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