基于關(guān)聯(lián)域的距離保護防連鎖跳閘策略研究
發(fā)布時間：2018-08-24 19:38
【摘要】：基于關(guān)聯(lián)域的距離保護防連鎖跳閘策略,可以有效的識別電網(wǎng)中潮流轉(zhuǎn)移的發(fā)生與傳遞,從后備保護與負荷控制的角度雙向應對潮流轉(zhuǎn)移帶來的影響,可靠防止連鎖事件的發(fā)生,其研究對防御大停電事故具有重要現(xiàn)實意義。本文在分析現(xiàn)有防連鎖跳閘策略的特點及存在問題的基礎上,首次嘗試將距離后備保護整定值調(diào)整與線路過負荷控制聯(lián)系在一起,利用廣域信息提升傳統(tǒng)距離保護的性能,實現(xiàn)電網(wǎng)安全防御系統(tǒng)三道防線的綜合應用,探索集保護與控制一體化的統(tǒng)一協(xié)調(diào)式防連鎖跳閘策略。論文的主要研究成果如下： (1)提出了利用保護安裝處電氣量的距離保護Ⅲ段過負荷閉鎖方案。分別給出針對故障狀態(tài)和過負荷狀態(tài)的識別判據(jù),通過判據(jù)校驗來區(qū)分故障和過負荷,使距離保護Ⅲ段具有選擇性閉鎖的能力； (2)提出了可識別電網(wǎng)結(jié)構(gòu)改變的視在阻抗修正算法。利用與電網(wǎng)運行實時同步的PMU數(shù)據(jù),實現(xiàn)在潮流轉(zhuǎn)移情況下輸電線路視在阻抗變化過程的動態(tài)計算,將線路視在阻抗的變化過程與線路有功功率的輸送情況建立聯(lián)系,從距離保護的角度進行潮流轉(zhuǎn)移識別； (3)提出了距離后備保護整定值自適應調(diào)整方案。計算距離保護Ⅲ段在不同整定值條件下所能承受的過負荷界限,以過負荷界限為標準,分別給出過負荷界限內(nèi)、過負荷界限外的距離保護Ⅲ段整定值調(diào)整方法； (4)提出了一種關(guān)聯(lián)區(qū)域的構(gòu)建方法。根據(jù)潮流轉(zhuǎn)移在發(fā)生初始對電網(wǎng)影響的有限性,構(gòu)建與潮流轉(zhuǎn)移、后備保護調(diào)整、過負荷控制三者密切相關(guān)的關(guān)聯(lián)區(qū)域,將全網(wǎng)計算簡化為區(qū)域計算： (5)提出了一種基于關(guān)聯(lián)域的防連鎖跳閘策略。該策略以調(diào)度中心為決策中樞,以后備保護整定值調(diào)整和線路過負荷控制為措施,將保護與控制集成為統(tǒng)一協(xié)調(diào)的整體,實現(xiàn)電網(wǎng)安全防御系統(tǒng)三道防線的綜合應用。
[Abstract]:The distance protection chain tripping strategy based on the correlation domain can effectively identify the occurrence and transmission of the power flow transfer in the power network, and deal with the impact of the power flow transfer from the angle of backup protection and load control. It is of great practical significance to prevent chain events from happening reliably and to prevent blackouts. On the basis of analyzing the characteristics and problems of the existing interlocking tripping strategy, this paper first tries to link the adjustment of setting value of the distance backup protection with the line overload control, and uses wide area information to improve the performance of the traditional distance protection. The integrated application of three lines of defense in power grid security defense system is realized, and a unified coordinated interlocking tripping strategy with integrated protection and control is explored. The main research results are as follows: (1) A distance protection section 鈪，
本文編號：2201825
[Abstract]:The distance protection chain tripping strategy based on the correlation domain can effectively identify the occurrence and transmission of the power flow transfer in the power network, and deal with the impact of the power flow transfer from the angle of backup protection and load control. It is of great practical significance to prevent chain events from happening reliably and to prevent blackouts. On the basis of analyzing the characteristics and problems of the existing interlocking tripping strategy, this paper first tries to link the adjustment of setting value of the distance backup protection with the line overload control, and uses wide area information to improve the performance of the traditional distance protection. The integrated application of three lines of defense in power grid security defense system is realized, and a unified coordinated interlocking tripping strategy with integrated protection and control is explored. The main research results are as follows: (1) A distance protection section 鈪，
本文編號：2201825
本文鏈接：http://sikaile.net/kejilunwen/dianlilw/2201825.html
教材專著
