發(fā)布時(shí)間：2019-03-22 15:37

【摘要】：當(dāng)系統(tǒng)由于線路故障、電源或者負(fù)荷投入切除而出現(xiàn)大幅擾動(dòng)時(shí),往往會(huì)引發(fā)復(fù)雜明顯的電磁干擾信號(hào),這將使存在電磁兼容性缺陷的電子式互感器采樣輸出數(shù)據(jù)異常,導(dǎo)致保護(hù)控制系統(tǒng)的誤動(dòng)和拒動(dòng)。站域保護(hù)的出現(xiàn)為上述問(wèn)題的解決提供了可能性,該文首先證明了輸電線路故障動(dòng)態(tài)特性相似性區(qū)域的存在,提出了電力系統(tǒng)拓?fù)潆x散性假設(shè)和狀態(tài)離散性假設(shè),得出輸電線路同型故障的概念;然后根據(jù)系統(tǒng)動(dòng)態(tài)實(shí)例與歷史案例之間的相似性,結(jié)合站域保護(hù)中各點(diǎn)信息可共享性,提出了電子式互感器伴隨故障甄別的原理、判據(jù)及具體實(shí)現(xiàn)方案,并給出描述故障電子式互感器的故障程度的評(píng)估指標(biāo);最后通過(guò)PSCAD搭建典型電力系統(tǒng)仿真模型,構(gòu)建不同情況下的電磁干擾算例,證明了所提甄別原理和方法的可行性及應(yīng)用價(jià)值。
[Abstract]:When the system is greatly disturbed due to line failure, power supply or load shedding, complex and obvious electromagnetic interference signals are often induced, which will make the sampling and output data of the electronic transformer with electromagnetic compatibility defect abnormal, resulting in the malfunction and rejection of the protection control system. The occurrence of station-domain protection provides the possibility for the above-mentioned problems. In this paper, the existence of the fault dynamic characteristic similarity region of the power transmission line is first proved, the topological discreteness assumption and the state discreteness assumption of the power system are put forward, and the concept of the type fault of the power transmission line is obtained. then according to the similarity between the dynamic case of the system and the historical case, and combining the information of each point in the station domain protection, the principle, the criterion and the specific implementation scheme of the electronic mutual inductor with fault discrimination are put forward, The evaluation index of the fault degree of the fault electronic transformer is given, and a typical power system simulation model is set up by the PSCAD, and an example of the electromagnetic interference in different cases is constructed, and the feasibility and the application value of the proposed screening principle and method are proved.
【作者單位】： 強(qiáng)電磁工程與新技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室(華中科技大學(xué)電氣與電子工程學(xué)院);許繼集團(tuán)有限公司;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51577077,51677108) 國(guó)家電網(wǎng)科技項(xiàng)目(SGTYHT/15-JS-191)資助
【分類(lèi)號(hào)】：TM45
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本文編號(hào)：2445710