發(fā)布時間：2018-08-02 10:11

【摘要】：隨著電力系統(tǒng)的不斷發(fā)展,電網(wǎng)結構的日益復雜,分布范圍變廣,維護的工作量和成本越來越大。長期以來,我國電力系統(tǒng)的設備檢修一直是遵循著“到期必修、修必修好”的周期性檢修原則而進行的,隨著二次設備數(shù)量的增多,繼電保護在系統(tǒng)中的作用日益重要,繼續(xù)采用以往周期性檢修的負面效應也體現(xiàn)出來。隨著微機保護的全面使用,裝置的自檢水平不斷提高,因此,采用常規(guī)的定期檢驗制度對設備進行維護是不合時宜的,必須根據(jù)保護設備的實際運行狀態(tài)實行狀態(tài)檢修。本文的主要工作在于： 首先,本文對目前繼電保護設備的檢修現(xiàn)狀進行介紹,提出目前存在的問題,分析了影響二次設備正常運行的原因。 其次,對在線監(jiān)測及故障診斷技術在繼電保護狀態(tài)檢修的運用進行了深入的探討。首先是從電力設備的可靠性技術的研究出發(fā),處于事故多發(fā)期的設備應增加在線監(jiān)測,接著總結了在線監(jiān)測應用存在的問題,研究出電氣二次設備在線監(jiān)測的實現(xiàn)方法。然后討論了狀態(tài)檢修中最關鍵的環(huán)節(jié)故障診斷專家系統(tǒng),給出了設備健康診斷的過程。 再次,基于繼電保護運行機理和實際情況,對繼電保護狀態(tài)評價參量和指標進行分析和選擇,從而建立繼電保護狀態(tài)評價指標體系和分級評價模型,并介紹了利用層次分析法對繼電保護狀態(tài)評價模型中各狀態(tài)參量的權重進行計算,合理反映繼電保護各狀態(tài)參量對繼電保護狀態(tài)的影響程度。 然后,著重闡述了PMS系統(tǒng)在日常工作中的運用情況,提出了利用生產管理信息系統(tǒng)中的實時而準確的基礎數(shù)據(jù),進行繼電保護狀態(tài)評價。 最后,為了給繼電保護狀態(tài)檢修有一個全面的指導,筆者結合目前浙江省電力公司的要求,介紹了狀態(tài)檢修下檢修策略的制定、狀態(tài)檢修試驗的項目和要求以及繼電保護首檢式驗收。
[Abstract]:With the development of power system, the structure of power network is becoming more and more complex, the scope of distribution is becoming wider, and the workload and cost of maintenance are increasing. For a long time, the equipment maintenance of electric power system in our country has been carried out in accordance with the periodic maintenance principle of "due and compulsory repair". With the increase of the number of secondary equipment, relay protection plays an increasingly important role in the system. The negative effects of continuing to use the previous periodic overhaul are also reflected. With the full use of microcomputer protection, the level of self-inspection of the device has been improved continuously. Therefore, it is inappropriate to use the routine periodic inspection system to maintain the equipment, and it is necessary to carry out the condition maintenance according to the actual operating state of the protection equipment. The main work of this paper is as follows: firstly, this paper introduces the current situation of the maintenance of relay protection equipment, puts forward the existing problems and analyzes the reasons that affect the normal operation of the secondary equipment. Secondly, the application of on-line monitoring and fault diagnosis technology in condition maintenance of relay protection is discussed. Starting from the research of reliability technology of electric power equipment, the equipment in the period of frequent accidents should be monitored on line. Then, the problems existing in the application of on-line monitoring are summarized, and the realization method of on-line monitoring of electrical secondary equipment is studied. Then the fault diagnosis expert system, which is the most important link in condition maintenance, is discussed, and the process of equipment health diagnosis is given. Thirdly, based on the operation mechanism and actual situation of relay protection, the evaluation parameters and indexes of relay protection state are analyzed and selected, and the evaluation index system and grading evaluation model of relay protection state are established. The weight of each state parameter in the state evaluation model of relay protection is calculated by analytic hierarchy process (AHP), and the influence degree of each state parameter of relay protection on the state of relay protection is reasonably reflected. Then, the application of PMS system in daily work is expounded, and the application of real-time and accurate basic data in production management information system is put forward to evaluate the state of relay protection. Finally, in order to give a comprehensive guidance to the condition maintenance of relay protection, the author introduces the formulation of maintenance strategy under the condition maintenance combined with the requirements of Zhejiang Electric Power Company at present. Condition maintenance test items and requirements as well as relay protection first check acceptance.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM774

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本文編號：2159101