本文選題：正序阻抗　切入點(diǎn)：差動(dòng)保護(hù)　出處：《電力系統(tǒng)自動(dòng)化》2017年12期 　論文類型：期刊論文

【摘要】：逆變型分布式電源區(qū)別于傳統(tǒng)電源的故障特性導(dǎo)致傳統(tǒng)電流保護(hù)難以快速可靠切除故障,也影響了現(xiàn)有輸電網(wǎng)保護(hù)原理直接應(yīng)用于配電網(wǎng)的動(dòng)作性能。借鑒電流差動(dòng)保護(hù)原理思想,定義了正序差動(dòng)阻抗,理論分析了其在區(qū)內(nèi)外故障時(shí)的幅值差異,提出了一種適用于有源配電網(wǎng)的正序阻抗差動(dòng)保護(hù)原理。為進(jìn)一步改善保護(hù)性能,有效應(yīng)對(duì)分支負(fù)荷的影響,構(gòu)造了帶制動(dòng)特性的動(dòng)作判據(jù)。針對(duì)區(qū)內(nèi)三相金屬性短路故障時(shí)保護(hù)存在的死區(qū)問題,利用故障時(shí)正序阻抗與正序電流幅值特征構(gòu)造了輔助判據(jù)。與傳統(tǒng)電流差動(dòng)保護(hù)相比,所述方法無需兩端數(shù)據(jù)同步采樣,對(duì)通信要求較低。仿真結(jié)果驗(yàn)證了保護(hù)原理的有效性。
[Abstract]:The fault characteristic of the inverter distributed power supply is different from the traditional power supply, which makes it difficult for the traditional current protection to remove the fault quickly and reliably. It also affects the operational performance of the current transmission network protection principle which is directly applied to the distribution network. With reference to the principle of current differential protection, the positive sequence differential impedance is defined, and the amplitude difference in the fault within and outside the region is analyzed theoretically. The principle of positive sequence impedance differential protection for active distribution network is proposed. In order to further improve the protection performance and effectively deal with the influence of branch load, In this paper, an action criterion with braking characteristics is constructed. Aiming at the dead zone problem in the fault of three-phase gold attribute short-circuit fault, an auxiliary criterion is constructed by using the amplitude characteristics of positive sequence impedance and positive sequence current in fault time. Compared with the traditional current differential protection, The method does not require synchronous data sampling at both ends and requires less communication. The simulation results verify the effectiveness of the protection principle.
【作者單位】： 電網(wǎng)智能化調(diào)度與控制教育部重點(diǎn)實(shí)驗(yàn)室(山東大學(xué));國網(wǎng)山東省電力公司濟(jì)南供電公司;
【基金】：國家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)資助項(xiàng)目(2012AA050213) 山東省重點(diǎn)研發(fā)計(jì)劃資助項(xiàng)目(2015GGX101011)~~
【分類號(hào)】：TM773

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本文編號(hào)：1647838