CAJ | 학술논문

大电网互联容易造成电力系统低频振荡,随着我国电力系统规模的不断扩大,区域间低频振荡限制了互联系统间的输电能力,并危及到电力系统安全运行.因此针对互联系统的弱阻尼问题,首先比较了目前抑制低频振荡的常规措施,而特高压交流线路上出现的约0.13 Hz的超低频振荡现象利用有限的电力系统稳定器(PSS)难以抑制,故采用并联储能型柔性交流输电系统(FACTS)装置进行抑制.通过分析并联储能型FACTS装置抑制低频振荡的机理,根据相角补偿原理设计了并联储能型FACTS装置的附加阻尼控制器,并在电力系统分析综合程序(PSASP)环境下进行仿真计算.仿真结果表明,含附加阻尼控制器的并联储能型FACTS装置能有效抑制特高压交流线路的功率振荡,可以增强互联系统阻尼比,能够提高华中电网和华北电网联网的稳定水平.
대전망호련용역조성전력계통저빈진탕,수착아국전력계통규모적불단확대,구역간저빈진탕한제료호련계통간적수전능력,병위급도전력계통안전운행.인차침대호련계통적약조니문제,수선비교료목전억제저빈진탕적상규조시,이특고압교류선로상출현적약0.13 Hz적초저빈진탕현상이용유한적전력계통은정기(PSS)난이억제,고채용병련저능형유성교류수전계통(FACTS)장치진행억제.통과분석병련저능형FACTS장치억제저빈진탕적궤리,근거상각보상원리설계료병련저능형FACTS장치적부가조니공제기,병재전력계통분석종합정서(PSASP)배경하진행방진계산.방진결과표명,함부가조니공제기적병련저능형FACTS장치능유효억제특고압교류선로적공솔진탕,가이증강호련계통조니비,능구제고화중전망화화북전망련망적은정수평.
To reduce weak damping in interconnected power systems,we compared effects of control methods of restraining the inter-area oscillation,analyzed the of mechanism of the damping control of the parallel FACTS with energy storage system(ESS),designed the additional damping controller based on the angle compensation principal,and simulated by power system analysis software package(PSASP).The parallel FACTS with ESS can quickly absorpt or release the active power and reactive power,and improve the controllability of the FACTS for the power system,especially for the ultra-high voltage AC transmission line whose inherent frequency is 0.13 Hz.The results show that the parallel FACTS with ESS with additional damping controller can effectively damp the inter-area oscillation and improve the stability of power system with the interconnection of Central China grid and North China grid through UHV AC transmission line.