中国电力 ›› 2015, Vol. 48 ›› Issue (11): 54-59.DOI: 10.11930.2015.11.54

• 电网 • 上一篇    下一篇

交直流控制措施改善频率安全的差异及评价指标

李威1,陈涛2,冯丽2,吕亚洲1,刘福锁1,任先成1,摆世彬3,丁茂生3,项丽3   

  1. 1. 国电南瑞科技股份有限公司,江苏 南京 211000;
    2. 国网重庆市电力公司,重庆 400014;
    3. 国网宁夏电力公司,宁夏 银川 750001)
  • 收稿日期:2015-09-16 出版日期:2015-11-18 发布日期:2015-11-18
  • 作者简介:李威(1976—),男,江苏睢宁人,博士,高级工程师(研究员级),从事大电网安全稳定分析与控制研究。E-mail: liwei10@sgepri.sgcc.com.cn
  • 基金资助:
    国家电网公司科技项目(适应智能化发展需求的电网安全和充裕控制技术研究与应用);国家电网公司大电网重大专项(SGCC-MPLG003-2012);宁夏电力公司科技项目(新能源送出控制保护关键技术研究与示范)。已申请国家发明专利(申请号:201410667145.7,201410667494.9)

Research on the Difference Mechanism and Evaluation Indices of ACDC Control Measures for Improving Frequency Safety

LI Wei1, CHEN Tao2, FENG Li2, LV Yazhou1, LIU Fusuo1, REN Xiancheng1, BAI Shibin3,DING Maosheng3, XIANG Li3   

  1. 1. NARI Technology Development Co.Ltd, Nanjing 211000, China;
    2. State Grid Chongqing Electric Power Company,Chongqing 400014, China;
    3. State Grid Ningxia Electric Power Company, Yinchuan 750001, China
  • Received:2015-09-16 Online:2015-11-18 Published:2015-11-18
  • Supported by:
    This work is supported by Science and Technology Program of SGCC, Large Power Grid Program with important and specified Program of SGCC (SGCC-MPLG003-2012), Science and Technology Program of Ningxia Electric Power Company.

摘要: 利用传统的控制灵敏度指标,可较好地指导下一步策略的优化,实现优化控制,避免控制措施负效应,但要获得每个控制措施的灵敏度,都要经过摄动计算,不满足在线快速决策的要求。从控制措施正反面作用角度,解释了不同控制措施对改善频率安全性灵敏度不同的机理,给出了频率安全控制措施实效量概念及其计算方法。提出了切机、切负荷及直流调制等措施对频率安全控制效果的快速评价指标,通过一次仿真获得所有候选控制措施的控制性能。基于实际电网仿真表明,该指标能取得与数值摄动法近似的灵敏度,大大减少了计算量,可以有效提高搜索效率并能够找到工程意义上的优化控制策略。

关键词: 频率安全, 量化分析, 灵敏度, 评价指标, 负效应, 控制措施实效量

Abstract: The traditional control sensitivity index could be a good measure to optimize the next direction of searching control strategy and avoid the negative effect. But the perturbation calculation is needed to obtain the sensitivity of each control measure, which would not be suitable for rapid online decision-making requirements. In this paper, from the standpoint of positive and negative effect of control measures, the mechanism of improving frequency safety sensitivity of various control measures is expounded. The conception and calculation method of the actual effect of frequency safety control is proposed. The fast evaluation indices of generator tripping and load shedding and HVDC modulation is also proposed, which could obtain the performance parameters of all control measures from one simulation. Actual power system simulation indicates that these evaluation indices have similar control sensitivity of the perturbation calculation and can significantly reduce the calculation quantity of simulation and improve the strategy searching efficiency for seeking out the practical optimal control strategy.

Key words: frequency safety, quantitative analysis, sensitivity, evaluation indices, negative effects, actual effect of control measures

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