电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
Power System Protection and Control
2015年
17期
119-124
,共6页
李楠%张亚琼%郭虎锋%陈香香%吴彦维
李楠%張亞瓊%郭虎鋒%陳香香%吳彥維
리남%장아경%곽호봉%진향향%오언유
换向失败%预测型熄弧角%FPGA, HCM3000%点火脉冲
換嚮失敗%預測型熄弧角%FPGA, HCM3000%點火脈遲
환향실패%예측형식호각%FPGA, HCM3000%점화맥충
commutation failure%predictive extinction angle%FPGA%HCM3000%firing pulse
HCM3000是特高压直流输电控制保护平台。平台采用实测性熄弧角策略来防止换向失败，该策略原理是检测到换相失败后增大点火角防止后续换向失败，因此它只能避免连续换向失败，但不能减少换向失败，所以在HCM3000中需引入预测型熄弧角控制算法。该算法通过实时采样计算来预测换向失败，在失败之前提前触发点火角避免换向失败。HCM3000中实现该算法主要有两个制约因素，一是采样及计算的快速性和实时性，二是预测型算法和HCM3000点火系统的适配。为了满足实时性和快速性，整个算法在FPGA内实现，为了适配HCM3000的点火系统，将点火时间转化为点火角度。HCM3000引入该算法后，通过 RTDS 仿真平台，模拟了单相及三相交流故障、丢脉冲等典型的会产生换相失败的故障。试验表明引入该算法后，HCM3000显著地降低了换向失败的概率。
HCM3000是特高壓直流輸電控製保護平檯。平檯採用實測性熄弧角策略來防止換嚮失敗，該策略原理是檢測到換相失敗後增大點火角防止後續換嚮失敗，因此它隻能避免連續換嚮失敗，但不能減少換嚮失敗，所以在HCM3000中需引入預測型熄弧角控製算法。該算法通過實時採樣計算來預測換嚮失敗，在失敗之前提前觸髮點火角避免換嚮失敗。HCM3000中實現該算法主要有兩箇製約因素，一是採樣及計算的快速性和實時性，二是預測型算法和HCM3000點火繫統的適配。為瞭滿足實時性和快速性，整箇算法在FPGA內實現，為瞭適配HCM3000的點火繫統，將點火時間轉化為點火角度。HCM3000引入該算法後，通過 RTDS 倣真平檯，模擬瞭單相及三相交流故障、丟脈遲等典型的會產生換相失敗的故障。試驗錶明引入該算法後，HCM3000顯著地降低瞭換嚮失敗的概率。
HCM3000시특고압직류수전공제보호평태。평태채용실측성식호각책략래방지환향실패，해책략원리시검측도환상실패후증대점화각방지후속환향실패，인차타지능피면련속환향실패，단불능감소환향실패，소이재HCM3000중수인입예측형식호각공제산법。해산법통과실시채양계산래예측환향실패，재실패지전제전촉발점화각피면환향실패。HCM3000중실현해산법주요유량개제약인소，일시채양급계산적쾌속성화실시성，이시예측형산법화HCM3000점화계통적괄배。위료만족실시성화쾌속성，정개산법재FPGA내실현，위료괄배HCM3000적점화계통，장점화시간전화위점화각도。HCM3000인입해산법후，통과 RTDS 방진평태，모의료단상급삼상교류고장、주맥충등전형적회산생환상실패적고장。시험표명인입해산법후，HCM3000현저지강저료환향실패적개솔。
HCM3000 is a control protection platform for UHVDC transmission. It uses a measured extinction angle algorithm for avoiding commutation failure. The theory is that adding ignition angle when detects the commutation failure for avoiding the following commutation failure, so it just can avoid continuous commutation failure, but cannot decrease the probability of commutation failure. Therefore, the HCM3000 adopts the predictive extinction angle control algorithm which can trigger ignition angle before commutation failure for avoiding commutation failure. In the HCM3000, there are two main constraints during the implementation, one is the rapidity and real-time performance of sampling and the computation, the other is the adaptation between predictive algorithm and HCM3000 ignition system. To meet the above two constraints, the whole algorithm is realized in FPGA and the ignition time is converted to ignition angle, respectively. After introducing the algorithm into HCM3000, this paper simulates typical faults which can lead to commutation failure, such as single-phase and three-phase AC fault, pulse loss through RTDS simulation platform. Test results show that HCM3000 significantly reduce the probability of commutation failure after adopting the algorithm.
