中国电机工程学报
中國電機工程學報
중국전궤공정학보
ZHONGGUO DIANJI GONGCHENG XUEBAO
2014年
7期
1079-1087
,共9页
郑超%汤涌%马世英%盛灿辉%罗立波%林俊杰%张恺%薛劲莹%陈得治%张志强
鄭超%湯湧%馬世英%盛燦輝%囉立波%林俊傑%張愷%薛勁瑩%陳得治%張誌彊
정초%탕용%마세영%성찬휘%라립파%림준걸%장개%설경형%진득치%장지강
弱联络线%振荡中心%受扰轨迹%安全稳定%紧急控制%启动判据%退出判据%多直流系统
弱聯絡線%振盪中心%受擾軌跡%安全穩定%緊急控製%啟動判據%退齣判據%多直流繫統
약련락선%진탕중심%수우궤적%안전은정%긴급공제%계동판거%퇴출판거%다직류계통
tie-line%oscillation center%disturbed trajectory%security and stability%emergency control%start criterion%revocation criterion%multi-HVDC system
交流跨区长距离弱联络线是电网同步稳定运行的薄弱环节。以华北-华中特高压交流互联电网为对象，研究大扰动冲击后系统振荡中心落于长治-南阳特高压交流联络线时，主要电气量受扰轨迹特征；揭示互联电网稳定裕度较小时，联络线有功功率轨迹出现“双峰”波动机理；识别峰值时刻对应的跨区互联电网同步稳定裕度及各电气量综合特征；在此基础上，定义紧急功率控制启动判据以及退出判据；提出利用多直流紧急功率控制改善互联电网稳定性的策略。特高压互联大电网的仿真结果，验证了控制判据及策略对降低互联电网解列风险的有效性。
交流跨區長距離弱聯絡線是電網同步穩定運行的薄弱環節。以華北-華中特高壓交流互聯電網為對象，研究大擾動遲擊後繫統振盪中心落于長治-南暘特高壓交流聯絡線時，主要電氣量受擾軌跡特徵；揭示互聯電網穩定裕度較小時，聯絡線有功功率軌跡齣現“雙峰”波動機理；識彆峰值時刻對應的跨區互聯電網同步穩定裕度及各電氣量綜閤特徵；在此基礎上，定義緊急功率控製啟動判據以及退齣判據；提齣利用多直流緊急功率控製改善互聯電網穩定性的策略。特高壓互聯大電網的倣真結果，驗證瞭控製判據及策略對降低互聯電網解列風險的有效性。
교류과구장거리약련락선시전망동보은정운행적박약배절。이화북-화중특고압교류호련전망위대상，연구대우동충격후계통진탕중심락우장치-남양특고압교류련락선시，주요전기량수우궤적특정；게시호련전망은정유도교소시，련락선유공공솔궤적출현“쌍봉”파동궤리；식별봉치시각대응적과구호련전망동보은정유도급각전기량종합특정；재차기출상，정의긴급공솔공제계동판거이급퇴출판거；제출이용다직류긴급공솔공제개선호련전망은정성적책략。특고압호련대전망적방진결과，험증료공제판거급책략대강저호련전망해렬풍험적유효성。
Trans-regional long-distance tie-line is the weak link that threatens the transient rotor angle stability of power system. The UHVAC tie-line connecting North China Power Grid (NCPG) with Central China Power Grid (CCPG) was taken as a case, the transient trajectories characteristic for tieline under short-circuit fault conditions were studied. It was revealed that active power disturbed trajectory has the mechanism of two peaks when stability margin of interconnected gird is small. Based on the relationship between disturbed trajectory characteristic and stability margin, the active power emergency control start criterion and revocation criterion were defined. The active power emergency control strategy for Central China Power Grid multi-HVDC system was presented. Simulation results verified that the stability of UHVAC interconnected system can be significantly improved by using the proposed emergency control criterion and strategies.
