计及电压幅值检测延时及相位跳变的IIDG故障电流解析计算  

IIDG Fault Current Analysis and Calculation Considering Voltage Amplitude Detection Delay and Phase Jump

作　　者：罗美玲 马英 黄伟兵 孟令昆 于晓军 郑涛 LUO Meiling;MA Ying;HUANG Weibing;MENG Lingkun;YU Xiaojun;ZHENG Tao(State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan 750001,China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China)

机构地区：[1]国网宁夏电力有限公司,宁夏银川750001 [2]新能源电力系统国家重点实验室(华北电力大学),北京102206

出　　处：《中国电力》2024年第2期72-81,共10页Electric Power

基　　金：国家自然科学基金联合基金资助项目(U2166205);国网宁夏电力有限公司科技项目(SGNX0000DKJS2200158)。

摘　　要：逆变型分布式电源(inverter interfaced distributed generation,IIDG)的波动性、弱馈性及强受控性,使其在故障下具有与同步发电机不同的短路电流特性,对其进行准确解析是继电保护适应性分析与保护新原理研究的基础,具有重要意义。针对现有研究忽略电压幅值检测延时导致IIDG故障特性难以准确解析的问题,以新能源送出线路发生三相短路为例,综合考虑电压幅值检测延时以及相位跳变所引起锁相环动态响应特性的影响,对IIDG故障暂态过程进行精细化划分,分别针对故障暂态过程的2个阶段,建立了电压电流双环控制和电流环控制下的故障电流解析表达式,明确了电压检测延时与锁相环动态响应对IIDG故障电流暂态特性的影响机理。最后,基于Matlab/Simulink仿真平台,验证了所提故障电流解析计算模型的正确性。The volatility,weak feedback,and strong control of inverter interfaced distributed generation(IIDG)make it have different short-circuit current characteristics from synchronous generators under faults,and accurate analysis of them is the basis for the analysis of relay protection adaptability and the research of new protection principles,which is of great significance.Since the existing literature ignores the voltage amplitude detection delay and makes it difficult to accurately analyze the fault characteristics of IIDG,this paper takes the three-phase short circuit of the new energy transmission line as an example,comprehensively considers the influence of the voltage amplitude detection delay and the dynamic response characteristics of the phase-locked loop caused by phase jump,and finely divides the transient process of IIDG fault.It also establishes the fault current analysis expression under voltage and current loop control and current loop control for the two stages of the transient process of the fault.The influence mechanism of voltage detection delay and dynamic response of phase-locked loop on the transient characteristics of IIDG fault current is clarified.Finally,based on the Matlab/Simulink simulation platform,the correctness of the fault current analysis and calculation model proposed in this paper is verified.

关 键 词：逆变型分布式电源 电流解析计算 幅值检测延时 相位跳变 对称故障 

分 类 号：TM464[电气工程—电器]