| 引用本文: | 卓毅鑫,李凌,赵成斌,等.一种基于振荡发散速率的次同步振荡风电场精准切机策略[J].电力系统保护与控制,2020,48(5):164-172.[点击复制] |
| ZHUO Yixin,LI Ling,ZHAO Chengbin,et al.A precision wind farm tripping strategy under sub-synchronous oscillation situation based on oscillation divergence rate (1. Guangxi Power Grid Dispatch and Control Center, Nanning 530023, China; 2. State Key Laboratory of Advanced[J].Power System Protection and Control,2020,48(5):164-172[点击复制] |
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| 一种基于振荡发散速率的次同步振荡风电场精准切机策略 |
| 卓毅鑫,李凌,赵成斌,黄飞鹏,戎子睿,卢纯颢,李一铭,金能,林湘宁 |
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| (广西电网电力调度控制中心，广西 南宁 530023;华中科技大学强电磁工程与新技术国家重点实验室，湖北 武汉 430074) |
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| 摘要: |
| 大规模风电接入弱交流系统、经高压直流输电线路或带串联补偿的交流输电线路外送时可能诱发电力系统的次同步振荡，造成大量风机脱网及相关设备的损坏。针对该问题，通过监测联络线有功功率振荡波形，并引入一种简单有效的方法来辨识次同步振荡。采用指数函数对次同步振荡的振幅进行拟合，确定次同步振荡的振荡模式及发散速率，并设计了振荡发散速率与风电机组切除台数的对应关系。最终，提出了次同步振荡下风电场三轮切机策略。理论分析和基于PSCAD的仿真结果表明所提风电场切机策略能有效抑制次同步振荡，保障电网的安全稳定运行，并可在次同步振荡下最大程度保存风电机组，提升风电消纳能力。 |
| 关键词: 风电场 次同步振荡 指数函数 发散速率 切机策略 |
| DOI：10.19783/j.cnki.pspc.190494 |
| 投稿时间：2019-05-05修订日期：2019-08-25 |
| 基金项目:国家自然科学基金重点项目资助(51537003);南网广西电网公司科技项目资助(GXKJXM20170244) |
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| A precision wind farm tripping strategy under sub-synchronous oscillation situation based on oscillation divergence rate (1. Guangxi Power Grid Dispatch and Control Center, Nanning 530023, China; 2. State Key Laboratory of Advanced |
| ZHUO Yixin,LI Ling,ZHAO Chengbin,HUANG Feipeng,RONG Zirui,LU Chunhao,LI Yiming,JIN Neng,LIN Xiangning |
| (Guangxi Power Grid Dispatch and Control Center, Nanning 530023, China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology, Wuhan 430074, China) |
| Abstract: |
| That large-scale wind power is connected to weak AC system or transmitted through HVDC transmission lines or series compensated AC transmission lines may induce Sub-Synchronous Oscillation (SSO) of power system, resulting in the disconnection of a large number of wind turbines and the damage of related equipment. To solve this problem, a simple and effective method is introduced to identify SSO by monitoring the oscillation waveform of the active power of the tie-line. The exponential function is used to fit the amplitude of the SSO, and the oscillation mode and the divergence rate of the SSO are determined. The corresponding relationship between the divergence rate of the oscillations and the number of wind turbines tripped is designed. Finally, a three-round wind farm tripping strategy under SSO situation is proposed. Theoretical analysis and simulation results based on PSCAD show that the proposed wind farm tripping strategy can effectively suppress SSO and ensure the safe and stable operation of the power grid. In addition, the wind turbines are preserved to the maximum extent under SSO situation and the wind power utilization capacity is enhanced. This work is supported by National Natural Science Foundation of China (No. 51537003) and Science and Technology Project of Southern China Power Grid Guangxi Power Grid Company (No. GXKJXM20170244). |
| Key words: wind farm SSO exponential function divergence rate wind farm tripping strategy |
