基于BPA的大电网紧急直流功率支援策略研究

朱玲<sup>1</sup>; 王晓茹<sup>1</sup>; 卢岑岑<sup>1</sup>; 郑伟杰<sup>2</sup>

引用本文:	朱玲,王晓茹,卢岑岑,等.基于BPA的大电网紧急直流功率支援策略研究[J].电力系统保护与控制,2013,41(23):139-144.
	ZHU Ling,WANG Xiao-ru,LU Cen-cen,et al.Research of emergency DC power support strategies for large-scale power grid based on PSD-BPA[J].Power System Protection and Control,2013,41(23):139-144

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基于BPA的大电网紧急直流功率支援策略研究
朱玲¹, 王晓茹¹, 卢岑岑¹, 郑伟杰²
1.西南交通大学电气工程学院，四川成都 610031;2.中国电力科学研究院，北京100192

摘要:

针对特高压交直流混联大电网的结构特点，研究了紧急直流功率支援策略对实际电网安全稳定运行的影响。基于PSD-BPA仿真平台，分析了直流功率提升策略对系统稳定性的作用，得到合适的功率支援开始时刻、支援量和持续时间，通过在系统回摆过程中采取功率回降策略改善紧急功率支援的效果。针对直流有功功率大方式调制，提出了直流调制附加控制器输入信号的选取原则，并与功率提升/回降方式比较，对比分析了两种方式下紧急功率支援的有效性。仿真结果表明，相比于功率提升/回降方式，有功功率调制改善了后续摆的稳定裕度及阻尼，紧急功率支援效果较为理想，为实际电网附加稳定控制策略的制定提供参考。

关键词: 交直流混联电网紧急直流功率支援功率提升/回降有功功率调制暂态稳定

DOI：10.7667/j.issn.1674-3415.2013.23.023

分类号:

基金项目:国家自然科学基金(51107124)；国家高技术研究发展计划（863项目）（2011AA05A105)

Research of emergency DC power support strategies for large-scale power grid based on PSD-BPA

ZHU Ling,WANG Xiao-ru,LU Cen-cen,et al

Abstract:

In allusion to the structural characteristics of UHAC/UHDC hybrid, the influence of emergency DC power support (EDCPS) on secure and stable operation of actual grid is studied. The effects of power upgrade strategy on system stability are analyzed based on PSD-BPA to obtain the proper starting-time, the proper amount and the proper duration of power support. The power backdown strategy is adopted during swing-back process to improve the results of emergency power support. Contraposing the active power modulation strategy, the selection principle of input signals for DC auxiliary controller is put forward. The effectiveness of active power modulation and power upgrade (or backdown) as emergency power support strategies is analyzed by comparison. Simulation results indicate that active power modulation improves the stability margin and damping of following-swing and has better results of emergency power support. Study results are available for reference in the drafting of additional stability function for actual AC/DC hybrid power grid.

Key words: AC/DC hybrid power grid emergency DC power support power upgrade (or backdown) active power modulation transient stability

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