高电压技术
高電壓技術
고전압기술
HIGH VOLTAGE ENGINEERING
2011年
7期
1811-1817
,共7页
串联谐振型故障限流器(SRFCL)%自触发保护%击穿二极管触发晶闸管%动作时序%避雷器能耗%阈值设计
串聯諧振型故障限流器(SRFCL)%自觸髮保護%擊穿二極管觸髮晶閘管%動作時序%避雷器能耗%閾值設計
천련해진형고장한류기(SRFCL)%자촉발보호%격천이겁관촉발정갑관%동작시서%피뢰기능모%역치설계
series resonant fault current limiter （ SRFCL ）%self-trigger protection%break over diode （BOD）%operation sequence%arrest energy%threshold design
为提高串联谐振型故障限流器（series resonant fault current limiter，SRFCL）旁路电路的可靠性，减小谐振电容的氧化锌避雷器（MOV）能量消耗，研究了晶闸管阀自触发保护动作电压阈值设计方法。限流器控制器失灵是最恶劣的故障态，只能依赖晶闸管阀自触发保护即击穿二极管触发晶闸管（break over diode，BOD）。设计了BOD动作时序，从动作时间和避雷器能耗角度分析阈值影响因素。BOD动作电压阈值决定了晶闸管阀过电压保护水平和触发时间。电压阈值设置低，BOD保护会和保护判据竞争；电压阈值设置高，避雷器能耗水平会提高。以华东电网限流器示范工程为背景，建立限流器仿真模型，通过大量仿真计算，总结了电压阈值变化对避雷器能耗水平影响规律，提出了电压阈值设计指标。研究结果对工程设计具有指导意义。
為提高串聯諧振型故障限流器（series resonant fault current limiter，SRFCL）徬路電路的可靠性，減小諧振電容的氧化鋅避雷器（MOV）能量消耗，研究瞭晶閘管閥自觸髮保護動作電壓閾值設計方法。限流器控製器失靈是最噁劣的故障態，隻能依賴晶閘管閥自觸髮保護即擊穿二極管觸髮晶閘管（break over diode，BOD）。設計瞭BOD動作時序，從動作時間和避雷器能耗角度分析閾值影響因素。BOD動作電壓閾值決定瞭晶閘管閥過電壓保護水平和觸髮時間。電壓閾值設置低，BOD保護會和保護判據競爭；電壓閾值設置高，避雷器能耗水平會提高。以華東電網限流器示範工程為揹景，建立限流器倣真模型，通過大量倣真計算，總結瞭電壓閾值變化對避雷器能耗水平影響規律，提齣瞭電壓閾值設計指標。研究結果對工程設計具有指導意義。
위제고천련해진형고장한류기（series resonant fault current limiter，SRFCL）방로전로적가고성，감소해진전용적양화자피뢰기（MOV）능량소모，연구료정갑관벌자촉발보호동작전압역치설계방법。한류기공제기실령시최악렬적고장태，지능의뢰정갑관벌자촉발보호즉격천이겁관촉발정갑관（break over diode，BOD）。설계료BOD동작시서，종동작시간화피뢰기능모각도분석역치영향인소。BOD동작전압역치결정료정갑관벌과전압보호수평화촉발시간。전압역치설치저，BOD보호회화보호판거경쟁；전압역치설치고，피뢰기능모수평회제고。이화동전망한류기시범공정위배경，건립한류기방진모형，통과대량방진계산，총결료전압역치변화대피뢰기능모수평영향규률，제출료전압역치설계지표。연구결과대공정설계구유지도의의。
Failure of limiter controller is the worst fault state and can only rely on thyristor trigger protection which is called break over diode （BOD）. Consequently, to improve the reliability of series resonant fault current limiter （SRFCL） bypass circuit and to reduce MOV of resonant capacitor energy consumption, we introduce a method of designing the threshold of self-trigger thyristor action voltage, in which BOD operation sequences are designed, and threshold factors are analyzed from the point of view of action time and surge arresters energy consumption. BOD action voltage threshold determines thyristor valve voltage protection level and trigger time. If voltage threshold is set low, BOD will complete with protection criterion. If voltage threshold is set high, the arrest energy consumption level will increase. In the background of East China Power Grid FCL demonstration project, current limiter simulation model is established. Moreover, the rule of voltage threshold effecting on arrester energy is summarized by simulation. Voltage threshold design specification is proposed and will benefit to engineering design.
