风电场集中并网对电网短路电流的影响研究  

Research on the Influence of Wind Farm Centralized Grid-Connection on Short-Circuit Current of Power Grid

作　　者：贺好艳 HE Hao-yan(Yulin Power Supply Company,State Grid Shaanxi Electric Power Company,Yulin 719100,China)

机构地区：[1]国网陕西省电力有限公司榆林供电公司,陕西榆林719100

出　　处：《电工电气》2022年第12期19-24,31,共7页Electrotechnics Electric

摘　　要：以榆林电网330 kV供电分区为研究对象,考察了常规火电机组和双馈风电机组接入电网对系统短路电流的影响及不同风电场装机容量对系统母线短路电流的贡献幅值,并研究了系统变电站、汇集站、串联方式和T接方式4种并网方式对系统母线三相短路电流的贡献幅值。研究结果表明:与常规火电机组相比,风电场提供给系统的短路电流较小,但随着风电场装机容量每增加50 MW,并网母线三相短路电流增幅0.34 kA左右,且风电场提供给系统母线的短路电流随着装机容量逐渐增加,增幅却逐渐降低;在4种风电场并网方式中,汇集站并网方式引起系统短路电流增幅最小,系统变电站直接并网引起系统短路电流增幅最大。The paper,taking 330 kV power supply division of Yulin power grid as the research object,investigates the influence of conventional fossil-fuel steam power units and doubly-fed wind turbines on system short-circuit current and contribution amplitude of various wind farm installed capacity to system bus short-circuit current,and also analyzes the contribution amplitudes of system station,collection station,series system,T-connection mode to system bus three-phase short-circuit current.According to the research,compared with the conventional fossil-fuel steam power unit,the doubly-fed wind turbine provides lower short-circuit current for the system.However,as the wind farm installed capacity increases by 50 MW,the three-phase short-circuit current of grid-connected bus increases by about 0.34 kA.Moreover,although the system bus short-circuit current increases with the rise of the wind farm installed capacity,the amplification decreases.Among four wind farm grid-connection modes,the collection station contributes to the lowest amplification for system short-circuit current,while the system station does the highest.

关 键 词：大规模风电 双馈风机 短路电流 并网方式 限制措施 

分 类 号：TM614[电气工程—电力系统及自动化] TM711