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1.电网安全与节能国家重点实验室(中国电力科学研究院有限公司),北京市 100192
2.国家电力调度控制中心,北京市 100031
3.国家电网有限公司华北分部,北京市 100053
屠竞哲(1984—),男,通信作者,博士,高级工程师,主要研究方向:电力系统稳定分析与控制。E-mail: tujingzhe@epri.sgcc.com.cn
张健(1978—),男,博士,教授级高级工程师,主要研究方向:电力系统规划与运行。
刘明松(1980—),男,博士,教授级高级工程师,主要研究方向:电力系统运行与控制。
收稿日期:2019-06-09,
修回日期:2020-01-31,
网络出版日期:2020-04-01,
纸质出版日期:2020-06-10
移动端阅览
屠竞哲,张健,刘明松等.考虑风机动态特性的大扰动暂态过电压机理分析[J].电力系统自动化,2020,44(11):197-205.
TU Jingzhe,ZHANG Jian,LIU Mingsong,et al.Mechanism Analysis of Transient Overvoltage with Large Disturbance Considering Dynamic Characteristics of Wind Generator[J].Automation of Electric Power Systems,2020,44(11):197-205.
屠竞哲,张健,刘明松等.考虑风机动态特性的大扰动暂态过电压机理分析[J].电力系统自动化,2020,44(11):197-205. DOI: 10.7500/AEPS20190609005.
TU Jingzhe,ZHANG Jian,LIU Mingsong,et al.Mechanism Analysis of Transient Overvoltage with Large Disturbance Considering Dynamic Characteristics of Wind Generator[J].Automation of Electric Power Systems,2020,44(11):197-205. DOI: 10.7500/AEPS20190609005.
在大容量直流和高占比新能源集中接入的电网背景下,暂态过电压问题极大地制约了直流输电能力和风电并网容量,亟须进一步深入研究考虑风机动态特性的大扰动暂态过电压机理及影响因素。文中从理论推导和仿真分析2个方面开展研究,首先推导了交直流故障后换流站和风机侧暂态电压幅值的理论计算公式;然后分析了交直流故障引发暂态过电压的机理及主要影响因素;最后结合仿真分析了风机低电压穿越期间不同有功、无功特性对暂态过电压的影响,通过实际系统算例进行了仿真验证。研究结果表明,风机低电压穿越特性将使得风电场成为换流站之外另一个导致暂态过电压的“无功源”,低电压穿越期间风机有功出力越小及无功出力越大将导致暂态过电压越严重。
Under the background of centralized access of large-capacity high voltage direct current (HVDC) and high-ratio renewable energy resources
the problem of transient overvoltage has severely constrained the transmission capacity of HVDC and interconnection capacity of wind power
so it is quite necessary to conduct further studies on mechanism and influencing factors of transient overvoltage under large disturbance considering dynamic characteristics of wind generators. The study is conducted through both theoretical derivation and simulation analysis. Firstly
the theoretical equations for calculating transient voltage magnitude of converter station and wind generator side after AC/DC contingency are derived. Then
the mechanism and main influencing factors of transient overvoltage caused by AC/DC contingency are analyzed. Finally
the impact of different active/reactive power characteristics of wind generator during low voltage ride-through (LVRT) on transient overvoltage is analyzed combined with simulations. All the conclusions are verified through the simulation of practical case systems. The study results show that the LVRT characteristic of wind generator makes the wind farm be another “reactive power source” resulting in transient overvoltage besides the converter station
and the severer of the transient overvoltage will be caused by the smaller active power output and the larger reactive power output for the wind generator.
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