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摘要:電力系統(tǒng)輸電線路中的短路故障大多數(shù)是瞬時(shí)性故障，因此，自動(dòng)重合閘技術(shù)已經(jīng)廣泛應(yīng)用于電力系統(tǒng)中，大大提高了供電的可靠性。但傳統(tǒng)的自動(dòng)重合閘技術(shù)采用定時(shí)重合，不對(duì)故障進(jìn)行判斷，即不論瞬時(shí)性故障還是永久性故障，自動(dòng)重合閘都會(huì)動(dòng)作。因此，在故障尚存時(shí)可能重合，對(duì)系統(tǒng)造成二次沖擊，不利于系統(tǒng)的穩(wěn)定，而且可能會(huì)對(duì)電力系統(tǒng)和系統(tǒng)中的設(shè)備造成很大的危害。為了避免輸電線路采用自動(dòng)重合閘時(shí)，重合于永久性故障所造成系統(tǒng)穩(wěn)定破壞等重大系統(tǒng)災(zāi)難，在微機(jī)保護(hù)的基礎(chǔ)上，自適應(yīng)重合閘的概念應(yīng)運(yùn)而生，雖然目前自適應(yīng)重合閘尚處于理論探索階段，但它將充分解決雙側(cè)有電源110kV線路重合閘成功率低的問(wèn)題。 本文以佛山電網(wǎng)某雙側(cè)有電源110KV線路為例，給出了一種新的自適應(yīng)單相重合閘方案，該方案與傳統(tǒng)的單相、三相、綜合重合閘方式相比，能夠在合閘前確定故障類(lèi)型，使重合閘裝置能夠根據(jù)具體的線路不同的故障情況決定動(dòng)作與否，永久性故障時(shí)閉鎖，瞬時(shí)性故障時(shí)啟動(dòng)，再確定合理的合閘時(shí)間，就能夠使系統(tǒng)避免再次受到短路的沖擊，提高系統(tǒng)運(yùn)行的安全性和穩(wěn)定性。文章以一回線A相接地故障（IAG）為例就雙側(cè)有電源同桿雙回線發(fā)生單相接地故障時(shí)的特征，利用PSCAD/EMTDC建模仿真，提出了識(shí)別輸電線路單相瞬時(shí)性故障的判據(jù)，并經(jīng)動(dòng)態(tài)仿真驗(yàn)證了其正確性。 關(guān)鍵詞：自動(dòng)重合閘；雙側(cè)電源；單相自適應(yīng)重合閘
Abstract:The faults of transmission lines are most temporary ones in power system.So,the auto-reclosure technique has been widely applied in real power systems now.It is an effective method to improve the stability and synchronism power systems.However，the present auto-reclosure technique normally employs a prescribed reclosure time, that is,the breaker is re-closed after a fixed period following a tripping operation without estimating fault nature.Main problem with the conventional reclosure scheme is a risk of a second shock to the system in the case of a permanent fault,when may lead to system oscillation.In order to avoid the power system disaster caused by reclosing on the permanent fault of transmission line，adaptive autoreclosure based on microproeessor-based protection arises at the historic moment,though is still in the stage of theory study.but It adequately solves the problem of low success rate on reclosure that has 110kv power Line with two sides. In this paper, a network of bilateral Foshan 110KV power lines are an example, a new adaptive single-phase reclosing program, which the traditional single-phase, three-phase, integrated reclosing, compared to the combined pre-determine the type of brake failure, so that reclosing the line can be different according to the specific decision of action or fault conditions, a permanent fault latch, when the start transient fault, and then determine a reasonable closing time, we can make the system to avoid re- the impact by the short circuit, and improve the system security and stability. An one-loop phase to ground fault (IAG) as an example on both sides with power transmission lines with ground fault occurs when the characteristics, using PSCAD/EMTDC modeling and simulation, identification of transmission lines made permanent and transient faults failure criterion, and by the dynamic simulation to verify its correctness. Keyword: Automatic recloser;Bilateral power; Single-pole adaptive recloser
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