| 引用本文: | 夏成军,华夏,李清.基于功率灵敏度的等值机出力定向调整策略[J].电力自动化设备,2019,39(2): |
| XIA Chengjun,HUA Xia,LI Qing.Directional adjustment strategy for equivalent generator output based on power sensitivity[J].Electric Power Automation Equipment,2019,39(2): |
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| 摘要: |
| 在校验动态等值前后一致性时发现等值前后由于平衡机出力变化会导致发生初始功角偏移的现象，针对该现象，分析了平衡机出力变化的原因和功角偏移的机理，提出一种基于功率灵敏度的等值机出力定向调整策略。在线路潮流控制量约束和机组出力调控量约束的基础上，确定节点的功率调整量，根据灵敏度的大小和线路潮流偏差的大小提出控制节点的选取原则。从控制节点和相应调整量的确定上保证等值前后线路潮流偏差在要求的范围内，并通过等值机出力的定向调整实现消除平衡机功角差的目的，同时给出了相应的调整步骤和实现的策略流程。以南方电网某年度方式数据为例，验证了所提调整策略的正确性和有效性。 |
| 关键词: 动态等值 初始功角偏移 功率灵敏度 调整策略 电力系统 |
| DOI：10.16081/j.issn.1006-6047.2019.02.018 |
| 分类号:TM711 |
| 基金项目:国家自然科学基金资助项目(51577071) |
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| Directional adjustment strategy for equivalent generator output based on power sensitivity |
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XIA Chengjun1, HUA Xia1, LI Qing2
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1.School of Electric Power, South China University of Technology, Guangzhou 510640, China;2.Maintenance & Test Center, CSG EHV Power Transmission Company, Guangzhou 510663, China
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| Abstract: |
| The initial power angle is not consistent before and after equivalence due to the variation of balancing machine output. To address this problem, the reason for the variation of balancing machine output and the mechanism of power angle deviation are analyzed. A directional adjustment strategy of equivalent generator output based on power sensitivity is presented. Based on the power flow control constraints for transmission lines and the ramping constraints for generators, the power adjustment of the control node is determined. According to the magnitude of the sensitivity and the line power flow deviation, the selection approach for control nodes is proposed. The line power flow deviation before and after the equivalent is controlled within the required range considering the determination of control nodes and the adjustment quantity. The power angle deviation of the balancing machine can be eliminated using directional adjustment of equivalent generator output. The corresponding adjustment steps and strategy process are also discussed. The effectiveness of the adjustment strategy is verified by the case of the annual data of China Southern Power Grid. |
| Key words: dynamic equivalence initial power angle deviation power sensitivity adjustment strategy electric power systems |
