| 引用本文: | 吴雪莲,李兆伟,刘福锁,等.大功率扰动下计及系统频率分布特性的紧急控制策略研究[J].电力系统保护与控制,2021,49(3):104-114.[点击复制] |
| WU Xuelian,LI Zhaowei,LIU Fusuo,et al.Analysis of the emergency control strategy of system frequency considering system frequency distribution characteristics under large power disturbance[J].Power System Protection and Control,2021,49(3):104-114[点击复制] |
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| 摘要: |
| 电网发生大功率扰动时，系统频率在大幅度偏移情况下，还可能存在明显的时空分布现象。通过对单机系统频率响应特性和两机系统的频率差异的分析，提出了大频差下考虑非线性因素的系统频率解析模型，以此来估算故障扰动下系统频率的最大偏移量。提出通过在不同时间选择在不同地点采取紧急控制的协调配合方法，在减小频率最大偏移量的同时，改善频率时空分布现象，从而提高电网的频率安全稳定性。 |
| 关键词: 频率 时空分布特性 紧急控制 解析模型 |
| DOI：DOI: 10.19783/j.cnki.pspc.200490 |
| 投稿时间：2020-05-03修订日期：2020-08-24 |
| 基金项目:国家电网公司科技项目资助(4000-201940418A- 0-0-00) |
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| Analysis of the emergency control strategy of system frequency considering system frequency distribution characteristics under large power disturbance |
| WU Xuelian,LI Zhaowei,LIU Fusuo,ZHU Ling,DUAN Fangwei,FAN Wei |
| (1. NARI Group Corporation/State Grid Electric Power Research Institute, Nanjing 211106, China;
2. NARI Technology Co., Ltd., Nanjing 211106, China; 3. Electric Power Research Institute of
State Grid Liaoning Electric Power Co., Ltd., Shenyang 110000, China) |
| Abstract: |
| When large-power disturbances occur in power grids, the system frequency will shift greatly, and there may be obvious spatial-temporal distribution characteristics. By analyzing the single-machine frequency response characteristics of the system and the frequency difference between the two systems, a system frequency analysis model considering nonlinear factors under large frequency difference is proposed to estimate the maximum offset of the system frequency. It is proposed to reduce the maximum frequency offset and improve the frequency spatiotemporal distribution characteristics by selecting the coordination method of emergency control at different locations at different times, thus enhancing the safety and stability of the power grid.
This work is supported by the Science and Technology Project of State Grid Corporation of China (No. 4000-201940418A-0-0-00). |
| Key words: frequency spatiotemporal distribution characteristics emergency control analytical model |
