本文選題：站域保護(hù) + 站域電流差動(dòng)��； 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：隨著計(jì)算機(jī)、通信等技術(shù)的不斷進(jìn)步,電網(wǎng)發(fā)展對(duì)繼電保護(hù)提出更高的要求,基于多源信息的站域保護(hù)能夠克服傳統(tǒng)保護(hù)僅獲取本地信息的先天性不足,已成為當(dāng)前研究的熱點(diǎn)。木文在研究站域保護(hù)的功能和構(gòu)成模式的基礎(chǔ)上,根據(jù)所需信息類型,提出了兩種站域保護(hù)方案：一種是利用站域范圍內(nèi)電氣量信息、基于電流差動(dòng)原理的站域保護(hù)方案,一種是利用站域范圍內(nèi)保護(hù)動(dòng)作冗余信息、基于保護(hù)信息融合的站域保護(hù)方案,最后以貴州都勻?qū)嶋H工程為依托實(shí)現(xiàn)并測(cè)試了站域保護(hù)功能。 利用各電流采樣值信息,提出了一種基于電流差動(dòng)原理的站域保護(hù)方案,首先定義了四類差動(dòng)區(qū),并對(duì)各差動(dòng)區(qū)內(nèi)故障進(jìn)行分析,然后設(shè)定了各差動(dòng)區(qū)的動(dòng)作方案,站域范圍內(nèi)各類元件故障時(shí)的動(dòng)作結(jié)果表明,通過(guò)四類差動(dòng)區(qū)之間協(xié)調(diào)配合,該方案可以有選擇性的快速切除站域范圍內(nèi)的故障,有效地改善并提升保護(hù)的整體性能。 利用就地保護(hù)的動(dòng)作信息,提出了一種基于保護(hù)信息融合的站域保護(hù)方案。首先根據(jù)保護(hù)對(duì)各元件的有效保護(hù)范圍計(jì)算出保護(hù)對(duì)元件故障識(shí)別的支撐度,然后將其作為保護(hù)動(dòng)作的權(quán)重,構(gòu)建站域電流保護(hù)融信度函數(shù)以及融信度期望函數(shù),最后根據(jù)二者比值即融信因子識(shí)別故障元件。結(jié)果表明該方案能正確快速識(shí)別故障元件,且能夠應(yīng)對(duì)信息缺失及錯(cuò)誤的情況,具有良好的適應(yīng)性以及一定的容錯(cuò)能力。 基于貴州都勻地區(qū)實(shí)際電網(wǎng)模型,選取其中最具代表性的變電站新寨變作為站域保護(hù)的測(cè)試對(duì)象,首先在RTDS仿真平臺(tái)中搭建了系統(tǒng)模型并配置相應(yīng)的站域保護(hù)模塊,然后對(duì)站域保護(hù)功能進(jìn)行了測(cè)試,測(cè)試結(jié)果驗(yàn)證了所提站域保護(hù)方案的正確性及可行性。
[Abstract]:With the development of computer, communication and other technologies, the development of power grid has put forward higher requirements for relay protection. The station area protection based on multi-source information can overcome the congenital deficiency of traditional protection which only obtains local information. It has become the hot spot of current research. On the basis of the function and structure mode of station domain protection, according to the type of information needed, this paper puts forward two kinds of station domain protection schemes: one is to use the electric quantity information in the station domain, and the other is to protect the station area based on the principle of current differential operation. One is to utilize the redundant information of protection action within the station area, and the protection scheme based on the protection information fusion. Finally, based on the actual project of Guizhou Duyun, the protection function of the station domain is realized and tested. Based on the information of each current sampling value, a protection scheme based on the principle of current differential is proposed. Firstly, four kinds of differential regions are defined, and the faults in each differential region are analyzed, then the action schemes of each differential region are set up. The operation results of various components in the station range show that the scheme can selectively and quickly remove the faults in the station area by coordinating the four kinds of differential regions and effectively improve and enhance the overall performance of the protection. Based on the action information of local protection, a protection scheme based on protection information fusion is proposed. Firstly, according to the effective protection range of each component, the support degree of the protection to the component fault identification is calculated, and then as the weight of the protection action, the reliability function and the expected function of the fusion reliability of the current protection in the station domain are constructed. Finally, the fault elements are identified according to the ratio of the two, that is, the fusion factor. The results show that the proposed scheme can identify fault components correctly and quickly, and can deal with the situation of missing and wrong information. The scheme has good adaptability and fault tolerance. Based on the actual power network model of Duyun area in Guizhou province, the most representative substation Xinzhai transformer is selected as the test object of the station area protection. Firstly, the system model is built in the RTDS simulation platform and the corresponding station protection module is configured. Then the station domain protection function is tested and the test results verify the correctness and feasibility of the proposed protection scheme.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM77

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本文編號(hào)：1938681