新能源经柔直送出系统的次同步振荡分析与抑制
Analysis and Mitigation of the Subsynchronous Oscillation in Renewable Energy System Connected to the MMC-HVDC
李浩志 1谢小荣 1刘芮彤 2姜齐荣1
作者信息
- 1. 新型电力系统运行与控制全国重点实验室(清华大学电机系),北京市 海淀区 100084
- 2. 国网辽宁省电力有限公司电力科学研究院,辽宁省 沈阳市 110006
- 折叠
摘要
2020 年 9-10 月份,我国华北地区某新能源经柔直送出系统出现了 2～6 Hz的持续振荡,导致风电机组频繁脱网和设备损坏.该文利用现场录波数据建立系统等效阻抗网络模型,解释次同步振荡的发生原因.为解决该问题,提出在风电机组变流器控制中嵌入次同步陷波环节的振荡抑制方法,依据实测数据进行参数设计,并进行现场实施与测试.多种工况下的实测结果表明,次同步陷波环节可有效抑制振荡且不影响风电机组的正常运行.该方法易于设计和实现,为解决类似问题提供一种高效实用的方案.
Abstract
During September and October 2022,2～6 Hz sustained oscillation occurred in a renewable energy system connected to the modular multilevel converter-based high voltage DC(MMC-HVDC)in Northern China,which caused frequent tripping of the doubly-fed induction generators(DFIGs)and equipment damages.The equivalent impedance network models are established using the field recorded data to explain the cause of the oscillation.To mitigate the oscillation,inserting the subsynchronous suppression filter in the DFIG converter control is proposed.The parameter is designed using the measured data,and then field implementation and tests are conducted.Field test results under different operating conditions validate that the proposed method can effectively mitigate the oscillation without any adverse effect on normal operation.It is confirmed the proposed scheme is easy to design and implement,providing an efficient and practical solution for similar issues.
关键词
新能源发电/柔性直流输电/次同步振荡Key words
renewable generation/multilevel converter-based high voltage DC/subsynchronous oscillation引用本文复制引用
基金项目
国家电网科技项目(5100-202199515A-0-5-ZN)
出版年
2024
国家科技期刊平台
NSTL
万方数据