CAJ | 학술논문

为了研究特高压交流输变电工程的建设对华东电网安全稳定性的影响,结合多个与华东落点相关的特高压输变电工程,采用电力系统仿真软件BPA对特高压交流电网发生单一或复杂故障的情况进行计算,分析了特高压交流电网建成后华东电网的安全稳定水平.计算结果表明,当徐州-南京北双回线路发生异名相跨线故障时,电压逐渐滑落同时伴随功角逐步摆大,系统暂态失稳;对所提出的3种安全稳定控制方案进行比较后确定了推荐方案.进一步分析徐州-南京北双回线路N-2故障时失稳情况特殊性的内在机理,是随着华东电网分层分区的进行,在大量受入有功功率或缺乏无功电源支撑的地区可能因线路故障从而引发电压稳定问题.
위료연구특고압교류수변전공정적건설대화동전망안전은정성적영향,결합다개여화동낙점상관적특고압수변전공정,채용전력계통방진연건BPA대특고압교류전망발생단일혹복잡고장적정황진행계산,분석료특고압교류전망건성후화동전망적안전은정수평.계산결과표명,당서주-남경북쌍회선로발생이명상과선고장시,전압축점활락동시반수공각축보파대,계통잠태실은;대소제출적3충안전은정공제방안진행비교후학정료추천방안.진일보분석서주-남경북쌍회선로N-2고장시실은정황특수성적내재궤리,시수착화동전망분층분구적진행,재대량수입유공공솔혹결핍무공전원지탱적지구가능인선로고장종이인발전압은정문제.
To study whether UHV AC transmission lines impact on the security and stability of East China Power Grid,combined with actual UHV power transmission projects related to the UHV substations located in East China,the situations with single and multi-faults were calculated with power system simulation software BPA,and the security and stability of East China Power Grid after constructing the UHV AC transmission system were analyzed.The results of analysis show that the system will lose its transient stability when overhead fault happens on Xuzhou -North Nanjing 1000kV double-circuit transmission line,the voltage of substation buses sliding with divergent rotor angle.Among the three corresponding control schemes,one is chosen as the commendatory scheme.The mechanism of the aforementioned N-2 fault particularity is further analyzed,in which voltage stability problem is possibly caused by heavy active power or deficient reactive power under the district-classified and level-classified operation mode of East China Power Grid.