计及新能源低穿影响的系统频率响应模型
A System Frequency Response Model Considering Impacts of New Energy's LVRT
叶希 1徐韵扬 2朱童 1王彦沣 1赵丽莉 3刘福锁 3陈刚4
作者信息
- 1. 国网四川省电力公司,四川 成都 610041
- 2. 国网四川省电力公司电力科学研究院,四川 成都 610047
- 3. 国电南瑞南京控制系统有限公司,江苏 南京 211106
- 4. 国网四川省电力公司电力科学研究院,四川 成都 610047;电力物联网四川省重点实验室,四川 成都 610047
- 折叠
摘要
建立电力系统频率响应模型,是当前实现频率预判的快速有效手段,有利于防止频率崩溃.对于水电为主的含高比例新能源的新型电力系统,现有的系统频率响应模型适应性不足,且未考虑新能源低穿控制的影响.对此,分析新能源低穿控制策略对系统频率的影响,提出了一种系统频率响应扩展模型.该模型基于系统频率响应通用模型结构,扩展了新能源有功变化量与系统频差间的关系.通过验证,表明该扩展模型进一步提升了现有模型的精度,具有较强的适应性.
Abstract
Establishing a system frequency response(SFR)model for the power system is currently a fast and effective means of predicting the frequency,which is conducive to preventing system frequency collapses.However,the existing SFR models are not suitable for the new power system mainly composed of hydropower units and with high proportion new energy.In addition,these models do not consider the impact of the low voltage ride through(LVRT)of new energy on the system frequency.Therefore,first of all,the impact of the LVRT control strategies of new energy on the system frequency is analyzed.Second,an extended model of SFR(ESFR model)is proposed.The ESFR model extends the relationship between the change in active power of new energy and the change in system frequency based on the general model structure of SFR.The verification by Sichuan Power Grid shows that the ESFR model further improves the accuracy of existing models and has strong adaptability.
关键词
频率响应模型/新能源/低电压穿越/扩展模型/新型电力系统Key words
SFR model/new energy/LVRT/extended model/new power system引用本文复制引用
出版年
2024
NETL
NSTL
万方数据