异步互联电网柔性直流输电紧急功率支援与动态区域控制偏差协调控制策略

doi:10.19595/j.cnki.1000-6753.tces.180737

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摘要在多条柔性直流并行的异步联网系统中,无论是柔性直流输电系统还是两侧交流电网发生严重故障,都会导致交流电网出现大幅功率缺额或盈余,对电网安全稳定运行造成严重危害。本文提出一种动态区域控制偏差（ACE）与柔性直流紧急功率支援协调控制策略。首先,对目标电力系统进行安全稳定分析,确定故障区域功率需求量以及动态ACE控制模块和柔性直流紧急功率支援模块两者的可支援容量;然后,根据所提出的协调控制数学模型和实施原则,选取最佳的紧急控制措施,同时确定各模块功率支援量。最后,根据关键断面潮流约束条件对协调控制指令进行修正并执行。以实际电网数据进行仿真,制定并实施该协调控制策略,结果表明异步互联电网的稳定性得到了有效提升,证明了所提控制策略的可行性。

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关键词 ：柔性直流输电, 异步互联, 紧急功率支援, 动态ACE

Abstract：In an asynchronous interconnected power grid with multiple VSC-HVDC lines, it may lead to significant power surplus or power shortage once a fault occurs in the VSC-HVDC system or in the AC power grid, which will cause power grid instability. In this paper, a coordinated control strategy of regional dynamic ACE and VSC-HVDC emergency power support is proposed. Firstly, the security and stability of the studied power system is analyzed to determine the power demand in the fault area as well as the supportable capacity of both dynamic ACE control module and VSC-HVDC emergency power support module. Then, the optimum emergency control strategy is selected to determine the amount of power support for each module according to the mathematical model and implementation principle of coordinated control strategy. Finally, the power instruction of coordinated control is modified and implemented based on the transfer capacity constraints of critical transmission lines. The proposed coordinated control strategy has been formulated and implemented using the actual data of power grids. The simulation results demonstrate the stability and feasibility of the proposed control strategy for asynchronous interconnected power grids.

Key words： Voltage source converter high voltage direct current (VSC-HVDC) asynchronous interconnection emergency power support coordinated control

收稿日期: 2018-04-29 出版日期: 2019-07-29

PACS:

TM721.1

基金资助:国家自然科学基金青年项目（51507056）,国家自然科学基金优秀青年项目（51722701）,湖南省自然科学基金（2017JJ3019）资助

通讯作者: 周斌男,1984年生,副教授,博士生导师,研究方向为智能电网分析与控制、电力规划与调度、电力系统综合节能。E-mail:binzhou@hnu.edu.cn

作者简介: 陈鹏远男,1990年生,硕士研究生,研究方向为电力系统稳定与控制。E-mail:cpy@hnu.edu.cn

引用本文:

陈鹏远, 黎灿兵, 周斌, 傅一苇, 余锐. 异步互联电网柔性直流输电紧急功率支援与动态区域控制偏差协调控制策略[J]. 电工技术学报, 2019, 34(14): 3025-3034. Chen Pengyuan, Li Canbing, Zhou Bin, Fu Yiwei, Yu Rui. VSC-HVDC Emergency Power Support and Dynamic Area Control Error Coordinated Control Strategy for Improving the Stability of Asynchronous Interconnected Power Grids. Transactions of China Electrotechnical Society, 2019, 34(14): 3025-3034.

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