【摘要】：西北750kV聯(lián)網(wǎng)工程是一項超高壓輸變電工程,它具有規(guī)模大、線路長、電壓高、機組大、聯(lián)網(wǎng)程度緊密等特點,是西北地區(qū)輸送各種形式電能關(guān)鍵部分。750kV變電站作為其核心紐帶作用,智能化程度越來越高,監(jiān)控裝置越來越多,其采用雙網(wǎng)雙保護配置,在拓撲結(jié)構(gòu)和保護配置相對于一般的變電站和輸電網(wǎng)都復(fù)雜和繁瑣。一旦發(fā)生故障,會涌入大量的報警信息,其信息的種類繁多、冗余信息干擾以及各種不確定性信息會對運行人員的分析判斷造成巨大的困難。因此研究變電站的故障診斷模型及系統(tǒng),為運行人員快速診斷出故障,并對故障恢復(fù)提供依據(jù),對于保證整個聯(lián)網(wǎng)工程的安全有效運行具有著重要的意義。論文主要研究內(nèi)容如下:(1)本文針對已有Petri網(wǎng)在750kV變電站故障診斷研究中模型建立龐大、建立邏輯復(fù)雜、通用性不強等問題,并結(jié)合750k V變電站雙網(wǎng)雙保護的配置,提出了基于有色Petri網(wǎng)的750kV變電站故障診斷方法,該方法將同類型庫所橫向折疊和同結(jié)構(gòu)變遷縱向壓縮,同時將保護和斷路器用單色及復(fù)合色進行顏色表示,從而使元件保護斷路器信息分類處理,條理清晰。在模型和推理中采用了分層和分網(wǎng)的思想,將其劃分為信息轉(zhuǎn)化層、信息比較層、信息診斷層和信息整合層四層,使得模型建立和推理簡單清晰,同時將其應(yīng)用在主網(wǎng)和冗余網(wǎng)中,最后將二者耦合得到耦合網(wǎng)。通過仿真驗證表明:該方法對750kV變電站單重和多重故障均能得到正確的結(jié)果,且推理速度快,模型簡便,且其結(jié)構(gòu)不受保護配置和電壓等級的改變而改變,通用性較強。(2)針對有色Petri網(wǎng)在750kV變電站故障診斷中得不到完備信號時易出現(xiàn)診斷錯誤以及保護拒動誤動時診斷的可信度下降無法體現(xiàn)出來,提出了一種基于改進有色Petri網(wǎng)的故障診斷方法,側(cè)重于通過保護信息的分類并與斷路器內(nèi)在邏輯關(guān)系的轉(zhuǎn)化得到真正表示斷路器狀態(tài)的信息,再與能夠直接表征故障的保護信息綜合診斷;同時在有色Petri網(wǎng)中引入模糊因子λ,相應(yīng)地顏色屬性中包含著置信度屬性w,解決診斷可信度下降及征兆信息不確定性問題。通過變遷標(biāo)識狀態(tài)的演變進行分類將整個改進有色Petri網(wǎng)分層表示,逐層精確,求解主網(wǎng)和冗余網(wǎng)的診斷結(jié)果,并通過耦合得到最終診斷結(jié)果。通過對單重和多重故障的仿真,該方法故障征兆信息表述明確,模型結(jié)構(gòu)簡單、規(guī)模小、適用性強,并能較好的解決信息缺失、存在拒動誤動等不確定性問題的處理。
[Abstract]:The Northwest 750kV interconnection project is an ultra-high voltage transmission and transformation project. It has the characteristics of large scale, long transmission line, high voltage, large units and close interconnection. It is the key part of transmitting various forms of electric energy in Northwest China. 750kV substation acts as its core link. The degree of intelligence is becoming higher and higher, and more monitoring devices are used. The topology and protection configuration are complex and cumbersome compared with the general substation and transmission network. Once failure occurs, there will be a large number of alarm information, and there are many kinds of information, redundant information interference and various uncertain information will cause great difficulties for operators to analyze and judge. Therefore, it is of great significance to study the fault diagnosis model and system of substation in order to quickly diagnose the fault and provide the basis for fault recovery, which is of great significance to ensure the safe and effective operation of the whole network project. The main contents of this paper are as follows: (1) aiming at the problems of establishing large model, complicated logic and weak generality in the fault diagnosis research of 750kV substation based on Petri net, combined with the configuration of double network and double protection in 750kV substation. A fault diagnosis method for 750kV substation based on colored Petri net is proposed. The method compresses the same type of library horizontally and vertically with the same structure transition, and represents the protection and circuit breaker with monochromatic and composite colors at the same time. Thus, the information of component protection circuit breaker can be classified and processed clearly. The idea of layer and network is adopted in the model and reasoning, which is divided into four layers: information transformation layer, information comparison layer, information diagnosis layer and information integration layer, which makes the model establishment and reasoning simple and clear. At the same time, it is applied to the main network and redundant network. Finally, the coupling network is obtained by coupling the two networks. The simulation results show that the method can get correct results for both single and multiple faults of 750 kV substation, and the reasoning speed is fast, the model is simple, and its structure is not changed by protection configuration and voltage grade. (2) in view of the fault diagnosis of 750kV substation, the colored Petri net is easy to appear the diagnosis error when the fault diagnosis is not complete, and the reliability of the diagnosis when the protection is not in the wrong operation can not be reflected. In this paper, a fault diagnosis method based on improved colored Petri nets is proposed, which focuses on the classification of protection information and the transformation of the inherent logic relationship with the circuit breaker to obtain the true information representing the state of the circuit breaker. At the same time, fuzzy factor 位 is introduced into colored Petri net, which contains confidence attribute w, which solves the problem of reliability decline and uncertainty of symptom information. By the evolution of transition identification states, the whole improved colored Petri net is represented by layers, and the diagnosis results of the main network and redundant net are solved, and the final diagnosis results are obtained by coupling. Through the simulation of single and multiple faults, the fault symptom information is expressed clearly, the model structure is simple, the scale is small, the applicability is strong, and it can solve the uncertain problems such as missing information and maloperation.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM63

【參考文獻】

相關(guān)期刊論文 前10條

1 董海鷹;李曉楠;姚軍;;基于粗糙集和灰關(guān)聯(lián)分析的750kV變電站故障診斷[J];高電壓技術(shù);2015年10期

2 董海鷹;李曉楠;;具有冗余保護的變電站模糊Petri網(wǎng)故障診斷[J];電力系統(tǒng)自動化;2014年04期

3 高明華;王冬;王學(xué)峰;張勇;;智能變電站設(shè)備在線監(jiān)測系統(tǒng)[J];山東電力技術(shù);2011年01期

4 ;An Image-Based Diagnostic Expert System for Corn Diseases[J];Agricultural Sciences in China;2010年08期

5 曾慶鋒;何正友;楊健維;;基于有色Petri網(wǎng)的電力系統(tǒng)故障診斷模型研究[J];電力系統(tǒng)保護與控制;2010年14期

6 栗然;高聰穎;張烈勇;;基于粗糙集-貝葉斯方法的分布式電網(wǎng)故障診斷[J];華北電力大學(xué)學(xué)報(自然科學(xué)版);2010年02期

7 劉昱;許玉香;于崢;尚勇;;750kV智能化變電站在線監(jiān)測系統(tǒng)配置[J];電網(wǎng)與清潔能源;2010年02期

8 范貴生;虞慧群;陳麗瓊;劉冬梅;;基于Petri網(wǎng)的服務(wù)組合故障診斷與處理[J];軟件學(xué)報;2010年02期

9 葉陽東;程少芬;王旭;賈利民;;基于一種混合Petri網(wǎng)的列車運行系統(tǒng)的建模與分析[J];鐵道學(xué)報;2009年05期

10 竇曉波;胡敏強;吳在軍;杜炎森;閔濤;;數(shù)字化變電站通信網(wǎng)絡(luò)的組建與冗余方案[J];電力自動化設(shè)備;2008年01期

相關(guān)博士學(xué)位論文 前1條

1 廖瑞金;變壓器絕緣故障診斷黑板型專家系統(tǒng)和基于遺傳算法的故障預(yù)測研究[D];重慶大學(xué);2003年

相關(guān)碩士學(xué)位論文 前4條

1 李曉楠;冗余保護配置的變電站故障診斷方法研究[D];蘭州交通大學(xué);2014年

2 張丹;基于模糊有色Petri網(wǎng)的故障診斷方法[D];鄭州大學(xué);2013年

3 熊國江;基于徑向基函數(shù)神經(jīng)網(wǎng)絡(luò)的電網(wǎng)故障診斷[D];華中科技大學(xué);2012年

4 鐘華兵;基于ANN和ES相結(jié)合的變電站報警信息處理系統(tǒng)[D];華北電力大學(xué);2001年

，

本文編號：2119233