| 引用本文: | 杨尉薇,朱玲,李威,等.风火打捆直流送出系统次同步振荡及传播特性研究[J].电力系统保护与控制,2019,47(20):58-64.[点击复制] |
| YANG Weiwei,ZHU Ling,LI Wei,et al.Study on subsynchronous oscillation and propagation characteristics of wind-fire bundled sending system[J].Power System Protection and Control,2019,47(20):58-64[点击复制] |
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| 摘要: |
| 风火打捆直流送出系统由于电力电子设备与交流电网的交互影响，可能引发系统次同步电气振荡，甚至火电机组轴系扭振。为深入研究这一现象，首先分析了风火打捆直流送出系统次同步振荡的原理。然后基于某实际区域电网参数，在PSCAD软件中建立了含火电、风电、直流的500 kV、220 kV电网模型，激发出特定条件下因风电场次同步电流谐波引发的火电机组轴系扭振现象。分析了风电场次同步谐波引发火电机组扭振的必要条件，同时仿真分析了线路谐波阻抗、电流振荡频率和方式检修等对次同步谐波传播路径的影响。 |
| 关键词: 次同步振荡 轴系扭振 传播路径 风火打捆 谐波阻抗 |
| DOI：10.19783/j.cnki.pspc.181455 |
| 投稿时间：2018-11-21 |
| 基金项目:国家电网公司科技项目资助(SGJS0000DKJS 1800254)，“分区电网安全稳定控制系统功能及可靠性闭环验证关键技术研究”;国网山西省电力公司项目资助“山西电网次同步振荡的仿真分析及控制措施” |
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| Study on subsynchronous oscillation and propagation characteristics of wind-fire bundled sending system |
| YANG Weiwei,ZHU Ling,LI Wei,ZHENG Huiping,LIU Fusuo,LIU Xinyuan |
| (State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China;Nari Group Corporation/State Grid Electric Power Research Institute, Nanjing 211106, China) |
| Abstract: |
| Due to the interaction between power electronic equipment and AC network, the wind-thermal-bundled sending system may cause subsynchronous electrical oscillation, even lead to torsional vibration of the shaft of thermal power units. In order to study this phenomenon in depth, the principle of subsynchronous oscillation of wind-thermal-bundled sending system is firstly analyzed. Then, based on the parameters of a practical regional power grid, 500 kV and 220 kV power grid model including thermal power, wind power and HVDC power transmission is built in PSCAD. The shaft torsional vibration of thermal power unit is excited under specific conditions, which may be caused by subsynchronous harmonic current in wind farm. Finally, the necessary condition of shaft torsional vibration of thermal power unit is analyzed, and the influence of line harmonic impedance, oscillation frequency, line overhaul mode on harmonic current propagation path is simulated and analyzed. This work is supported by Science and Technology Project of State Grid Corporation of China (No. SGJS0000DKJS 1800254) “Research on Key Technologies for Closed Loop Verification of Power Grid Stability Control Function” and Fund of State Grid Shanxi Electric Power Company “Simulation Analysis and Control Measures of Sub-Synchronous Oscillation in Shanxi Power Grid”. |
| Key words: subsynchronous oscillation torsional vibration of shaft system propagation path wind-fire bundled harmonic impedance |
