發(fā)布時(shí)間：2018-02-17 06:06

  本文關(guān)鍵詞： 配電網(wǎng) 廣域保護(hù) 故障定位算法 保護(hù)裝置設(shè)計(jì)　出處：《華北電力大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著電力技術(shù)的發(fā)展和進(jìn)步,配電網(wǎng)結(jié)構(gòu)也隨之復(fù)雜化,對(duì)繼電保護(hù)裝置自身性能要求也逐步增強(qiáng)。傳統(tǒng)的繼電保護(hù)裝置雖然在不斷進(jìn)步,從最初的電磁型保護(hù)逐步到微機(jī)型保護(hù),但是局限性依然存在,不能滿足新型電網(wǎng)對(duì)其正確、快速、可靠三項(xiàng)基本指標(biāo)的要求,此外傳統(tǒng)保護(hù)一般只覆蓋局部配電網(wǎng),并不能考慮保護(hù)動(dòng)作對(duì)整個(gè)配電網(wǎng)產(chǎn)生的影響。而廣域保護(hù)理念的提出將繼電保護(hù)引入一個(gè)全新的領(lǐng)域,借助日趨成熟的通信技術(shù),使得廣域范圍內(nèi)所有相關(guān)電氣量與信息得以共享。當(dāng)電網(wǎng)發(fā)生故障后,廣域保護(hù)決策系統(tǒng)可以對(duì)保護(hù)區(qū)域進(jìn)行決策控制,通過高速的光纖通信,實(shí)現(xiàn)主站故障定位與廣域保護(hù)功能同時(shí)實(shí)現(xiàn),確保電網(wǎng)的安全性。 本文將廣域保護(hù)思想與配電網(wǎng)網(wǎng)絡(luò)特性相結(jié)合,提出了基于方向比較原理的配電網(wǎng)廣域保護(hù)及故障定位算法,應(yīng)用配電網(wǎng)廣域保護(hù)算法對(duì)幾種常見的配電網(wǎng)接線方式進(jìn)行了詳細(xì)的分析,實(shí)現(xiàn)配電網(wǎng)各個(gè)節(jié)點(diǎn)信息間的有效結(jié)合,快速定位故障區(qū)域。隨后利用PSCAD仿真平臺(tái)建模仿真,依據(jù)詳細(xì)的仿真曲線分析了配電網(wǎng)發(fā)生相間短路故障及單相接地故障時(shí)的廣域保護(hù)及故障定位動(dòng)作過程。 本文分析了廣域保護(hù)終端的構(gòu)造及其功能,如實(shí)現(xiàn)關(guān)鍵技術(shù)、涉及硬件芯片和檢測(cè)終端的硬件設(shè)計(jì)等,并對(duì)終端設(shè)備進(jìn)行了相應(yīng)的改進(jìn)；研究了廣域保護(hù)終端軟件實(shí)現(xiàn)方法,分析了其數(shù)據(jù)采樣流程,并編制了相應(yīng)功能算法的實(shí)現(xiàn)函數(shù)。對(duì)于廣域保護(hù)主站,首先,給出了配電網(wǎng)廣域保護(hù)主站軟件的流程框圖；然后,設(shè)計(jì)了廣域保護(hù)故障定位算法以及相應(yīng)的子函數(shù)；最后簡(jiǎn)要說明了廣域保護(hù)的動(dòng)作過程。 利用RTDS實(shí)時(shí)仿真平臺(tái)上的實(shí)際線路仿真分析,很好的驗(yàn)證了本文所提出的廣域保護(hù)及故障定位算法的有效性。
[Abstract]:With the development and progress of power technology, the structure of distribution network becomes more complicated, and the performance requirements of relay protection devices are gradually enhanced. From the initial electromagnetic protection to the microcomputer protection, but the limitations still exist, which can not meet the requirements of the new power grid for its correct, fast and reliable three basic indicators, in addition, the traditional protection generally only covers the local distribution network. It is not possible to consider the impact of protection action on the whole distribution network. However, the concept of wide area protection has introduced relay protection into a new field, with the aid of increasingly mature communication technology. When the power network fails, the wide area protection decision-making system can control the protection area, through high-speed optical fiber communication, The main station fault location and wide area protection function are realized simultaneously to ensure the security of power grid. In this paper, the wide area protection and fault location algorithm based on the principle of direction comparison are proposed, which combines the idea of wide area protection with the characteristics of distribution network. Based on the wide area protection algorithm of distribution network, several common distribution network connection methods are analyzed in detail to realize the effective combination of the information of each node in the distribution network, and to quickly locate the fault area. Then, the PSCAD simulation platform is used to model and simulate the distribution network. Based on the detailed simulation curves, the wide area protection and fault location process of distribution network with interphase short circuit fault and single phase grounding fault are analyzed. In this paper, the structure and function of wide area protection terminal are analyzed, such as the key technology, the hardware design of hardware chip and detection terminal, and the corresponding improvement of terminal equipment, the realization method of wide area protection terminal software is studied. The data sampling flow is analyzed, and the realization function of the corresponding function algorithm is worked out. For wide area protection master station, firstly, the flow chart of distribution network wide area protection master station software is given, and then the flow chart of the distribution network wide area protection master station software is given. A wide area protection fault location algorithm and its corresponding subfunctions are designed. Finally, the operation process of wide area protection is briefly explained. The effectiveness of the proposed wide-area protection and fault location algorithm is well verified by using the actual circuit simulation analysis on the RTDS real-time simulation platform.
【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)】：TM774

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本文編號(hào)：1517399