基于延时补偿的新能源惯性时间常数评估方法  

Evaluation Method for Inertial Time Constant of Renewable Energy Based on Delay Compensation

作　　者：朱介北 朱学科 陈彬彬 俞露杰 聂川杰 黄伟煌 郭铸 ZHU Jiebei;ZHU Xueke;CHEN Binbin;YU Lujie;NIE Chuanjie;HUANG Weihuang;GUO Zhu(School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China;Guangxi Power Grid Co.,Ltd.,Nanning 530023,China;Electric Power Research Institute of China Southern Power Grid Company Limited,Guangzhou 510663,China)

机构地区：[1]天津大学电气自动化与信息工程学院,天津市300072 [2]广西电网有限责任公司,广西壮族自治区南宁市530023 [3]南方电网科学研究院有限责任公司,广东省广州市510663

出　　处：《电力系统自动化》2024年第8期101-110,共10页Automation of Electric Power Systems

基　　金：广西电网公司科技项目(040000KC23040022);国家自然科学基金资助项目(U23B20123)。

摘　　要：新能源惯量响应正逐步成为并网规程的新要求及辅助服务市场的新产品,其惯量响应性能的测试与惯性时间常数的评估,有助于满足相应并网规程要求和清算辅助服务产品经济效益,但惯量响应性能测试标准中未涉及惯性时间常数的评估方法。为此,文中提出了一种基于延时补偿的新能源惯性时间常数评估方法。首先,基于电网模拟器生成系统可能存在的频率变化率和频率偏移量,依据惯量关键评价指标合理选取全动态过程分析的时间节点,以提高分析精度;然后,对惯量响应过程中的有功功率-频率延迟环节进行计算和补偿,以消除延迟造成的评估误差;最后,设计了一种依据差分化同步机摇摆方程的惯量连续评估算法,实现对新能源惯量的准确评估。在RT-LAB半实物平台搭建了新能源惯量评估实验环境,验证了所提算法在不同延时场景下评估结果的准确性。The renewable energy inertia response is gradually becoming a new requirement of grid connection regulations and a new product in the auxiliary service market.The testing of inertia response performance and the evaluation of inertia time constant can help meet the corresponding requirements of grid connection regulations and clear the economic benefits of auxiliary service products.However,the evaluation method for the inertia time constant is not involved in the test standard of inertia response performance.Therefore,this paper proposes an evaluation method for the inertia time constant of renewable energy based on delay compensation.Firstly,the rate of change of frequency and the frequency offset that may exist in the system are generated based on the power grid simulator,and the time nodes for full dynamic process analysis are reasonably selected according to the key evaluation indicators of inertia to improve the analysis accuracy.Secondly,the active power-frequency delay link in the inertia response process is calculated and compensated to eliminate the evaluation error caused by the delay.Finally,a continuous inertia evaluation algorithm based on the differential synchronous machine swing equation is designed to accurately evaluate the inertia of renewable energy.A renewable energy inertia evaluation experimental environment is built on the RT-LAB semi-physical platform to verify the accuracy of the evaluation results with the proposed algorithm in different delay scenarios.

关 键 词：新能源 惯量响应 评估方法 延时补偿 

分 类 号：TM73[电气工程—电力系统及自动化]