EN风电低电压穿越过程频率变化量的解析表达式
Analytical Expression of Frequency Variation in Wind Power Low Voltage Ride Through Process
- 现代电力 2025年第6期 页码：1202-1209
- 作者机构：
1. 河北省分布式储能与微网重点实验室(华北电力大学),河北省,保定市,071003
2. 南瑞集团有限公司(国网电力科学研究院有限公司),江苏省,南京市,211100
- 作者简介：
[ "赵书强(1964)，男，博士，教授，主要研究方向为电力系统稳定性分析与控制，E-mail：zsqdl@163.com" ]
[ "李亚明(1998)，男，硕士，主要研究方向为电力系统稳定性分析，E-mail：1441506867@qq.com" ]
[ "朱玲(1986)，女，高级工程师，主要研究方向为新能源电力系统分析，E-mail：18251856079@qq.com" ]
[ "黄锡芳(1993)，女，高级工程师，主要研究方向为新能源电力系统分析，E-mail：18251821215@qq.com" ]
- 基金信息：国家电网有限公司总部科技项目资助（5100-202140478A-0-5-ZN）。
DOI：10.19725/j.cnki.1007-2322.2023.0288
中图分类号：-
纸质出版：2025
- 稿件说明：
移动端阅览
赵书强, 李亚明, 朱玲, 等. 风电低电压穿越过程频率变化量的解析表达式[J]. 现代电力, 2025,(6):1202-1209.
ZHAO Shuqiang, LI Yaming, ZHU Ling, et al. Analytical Expression of Frequency Variation in Wind Power Low Voltage Ride Through Process[J]. 2025, (6): 1202-1209.
赵书强, 李亚明, 朱玲, 等. 风电低电压穿越过程频率变化量的解析表达式[J]. 现代电力, 2025,(6):1202-1209. DOI： 10.19725/j.cnki.1007-2322.2023.0288.
ZHAO Shuqiang, LI Yaming, ZHU Ling, et al. Analytical Expression of Frequency Variation in Wind Power Low Voltage Ride Through Process[J]. 2025, (6): 1202-1209. DOI： 10.19725/j.cnki.1007-2322.2023.0288.
摘要
风电进入低电压穿越状态后会造成有功扰动，目前运行的风电机组具有良好的低电压穿越能力，能够在故障后不脱网运行，因此有功扰动形式不再完全等效为阶跃，而是在阶跃后存在斜坡恢复。目前，针对有功斜坡恢复情况下的系统频率量化特性研究较少。为此，在电力系统简化频率闭环模型的基础上，引入参数风电占比，再将闭环频率模型进行开环简化，进而通过开环模型推导出频率的解析表达式，并在表达式的基础上计算得到系统的最大风电占比。最后，在Matlab/Simulink和PSCAD/EMTDC电磁暂态仿真软件环境下分别验证开环方法和所推表达式在含风电电力系统低电压穿越下的有效性。
Abstract
When the wind power enters the low voltage ride through state
it will cause active power disturbance. Nowadays
wind turbines possess excellent low voltage ride through ability and can run without off-grid operation after a fault occurs. The active power disturbance form is no longer strictly equivalent to a step; instead
it exhibits a slope recovery after the step. The current research on the system frequency quantization characteristics in the case of active slope recovery is limited. Therefore
the introduction of wind power into the closed-loop frequency model is performed on the basis of simplifying the frequency closed-loop model of the power system
and the model is simplified to an open-loop one by fitting function method. The analytical expression of the maximum frequency variation is then derived through the open-loop model
and the maximum wind power ratio of the system and the minimum droop coefficient of wind power participating in frequency regulation are calculated based on this expression. Finally
the effectiveness of the open-loop method and the proposed formula under the low voltage ride through of the power system with wind power is verified through simulations using Matlab/Simulink and PSCAD/EMTDC electromagnetic transient simulation software.
关键词
Keywords
references
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