浙江电力2025，Vol.44Issue(2)：75-83,9.DOI:10.19585/j.zjdl.202502007
考虑高比例新能源接入的变电站备自投方案改进
Improvement of an ATS scheme for substations considering high new energy penetration
摘要
Abstract
As the share of new energy in power systems continues to grow,the formation of islanded new energy mi-crogrids has become more common.However,the low voltage ride-through(LVRT)characteristics of new energy of-ten result in residual voltage on the busbars,making it challenging to meet the no-voltage condition required for au-tomatic transfer switch(ATS)schemes.Additionally,the lack of stable frequency and voltage support in islanded microgrids poses a risk of instability.Current solutions typically involve disconnecting new energy sources before ini-tiating ATS operations.To enable ATS operation without disconnecting new energy,this paper analyzes the voltage and frequency dynamics of islanded microgrids after breaker tripping and their influencing factors.A fast frequency tracking algorithm based on extended Kalman filter(EKF)is introduced,leading to a rapid quasi-synchronous grid-connection scheme.When frequency deviations are significant,approximate source-load power matching within the islanded system is performed to effectively suppress inrush currents during reclosing.Finally,PSCAD simulations validate the effectiveness and feasibility of the proposed improved ATS scheme.关键词
新能源/备自投/并网策略/扩展卡尔曼滤波/功率匹配Key words
new energy/ATS/grid-connection strategy/EKF/power matching引用本文复制引用
叶远波,王吉文,王贺,周昊..考虑高比例新能源接入的变电站备自投方案改进[J].浙江电力,2025,44(2):75-83,9.基金项目
国家电网有限公司科技项目(521200223001N) （521200223001N）
