高电压技术
高電壓技術
고전압기술
HIGH VOLTAGE ENGINEERING
2011年
8期
1832-1842
,共11页
周沛洪%阿慧雯%戴敏%娄颖
週沛洪%阿慧雯%戴敏%婁穎
주패홍%아혜문%대민%루영
特高压(UHV)%紧凑型输电线路%可控高抗%故障响应时间%过电压%无功调节
特高壓(UHV)%緊湊型輸電線路%可控高抗%故障響應時間%過電壓%無功調節
특고압(UHV)%긴주형수전선로%가공고항%고장향응시간%과전압%무공조절
ultra high voltage（UHV）%compact transmission line%controllable reactors%response time to line fault%over-voltage%reactive power adjustment
特高压紧凑型输电线路若同示范工程一样采用高补偿度的固定式高抗，将严重限制特高压紧凑型输电线路提高输送能力的优势，增加线路和变压器的损耗。为了克服固定式高抗的缺点，依托长度为500km特高压紧凑型系统联络线工程，采用EMTP程序模拟计算方法，研究了特高压紧凑型输电线路采用直流助磁式和电抗分级式两种类型的可控电抗器的必要性和可行性。提出了两种类型可控高抗的参数和对故障的响应时间。研究表明：响应时间定为200ms，可满足无功调节、限制工频过电压、单相重合闸操作过电压和采用0．7～1s单相重合闸无电流时间间隔的要求。推荐特高压紧凑型输电线路可优先选用单独采用高速真空开关的电抗分级式可控高抗，而无需断路器并联双向控硅阀，500kV可控高抗现场试验结果也证明了该建议是可行的。
特高壓緊湊型輸電線路若同示範工程一樣採用高補償度的固定式高抗，將嚴重限製特高壓緊湊型輸電線路提高輸送能力的優勢，增加線路和變壓器的損耗。為瞭剋服固定式高抗的缺點，依託長度為500km特高壓緊湊型繫統聯絡線工程，採用EMTP程序模擬計算方法，研究瞭特高壓緊湊型輸電線路採用直流助磁式和電抗分級式兩種類型的可控電抗器的必要性和可行性。提齣瞭兩種類型可控高抗的參數和對故障的響應時間。研究錶明：響應時間定為200ms，可滿足無功調節、限製工頻過電壓、單相重閤閘操作過電壓和採用0．7～1s單相重閤閘無電流時間間隔的要求。推薦特高壓緊湊型輸電線路可優先選用單獨採用高速真空開關的電抗分級式可控高抗，而無需斷路器併聯雙嚮控硅閥，500kV可控高抗現場試驗結果也證明瞭該建議是可行的。
특고압긴주형수전선로약동시범공정일양채용고보상도적고정식고항，장엄중한제특고압긴주형수전선로제고수송능력적우세，증가선로화변압기적손모。위료극복고정식고항적결점，의탁장도위500km특고압긴주형계통련락선공정，채용EMTP정서모의계산방법，연구료특고압긴주형수전선로채용직류조자식화전항분급식량충류형적가공전항기적필요성화가행성。제출료량충류형가공고항적삼수화대고장적향응시간。연구표명：향응시간정위200ms，가만족무공조절、한제공빈과전압、단상중합갑조작과전압화채용0．7～1s단상중합갑무전류시간간격적요구。추천특고압긴주형수전선로가우선선용단독채용고속진공개관적전항분급식가공고항，이무수단로기병련쌍향공규벌，500kV가공고항현장시험결과야증명료해건의시가행적。
In order to overcome disadvantages of general UHV AC reactor, the necessity and feasibility of application of magnetically controlled type and reactance stepping controlled type of UHV AC reactor are studied by EMTP simulation, on the basis of a project of 500 km UHV AC compact transmission line connected in between two 500 KV power network. The parameters and response time to llne fault of the two types of controllable reactor are pres- ented. The results reveal that 200 ms response time should be specified, which is able to meet the requirements of reactive power adjustment, limitation of power frequency overvoltage, and 0.7 s time interval without second arc current for single reclose of line circuit breakers. The reactance stepping controlled type reactor only controlled by high speed vacuum switch is recommended to be selected in preference. The bidirectional thyristor valve collected parallel with vacuum switch is not necessary, and the field test result of 500 kV controllable reactor can prove this feasibility of suggestion.
