【摘要】：變電站備用電源中廣泛使用的閥控式密封鉛酸蓄電池(Valve Regulated Lead Acid Battery以下簡稱蓄電池或VRLA)在性能方面被廣泛認可,其作用是在交流電源失電時為站內(nèi)斷路器等重要設(shè)備提供分合閘操作的動力。蓄電池的可靠性關(guān)系到電網(wǎng)安全穩(wěn)定,但運行維護時有多種不利條件使其性能降低,壽命縮短。所以優(yōu)化當前的運維手段,準確把握蓄電池性能狀態(tài)是提高備用電源可靠性的關(guān)鍵。論文的背景為東莞電網(wǎng)站用蓄電池,使用分析原理、描述性研究的方法進行蓄電池內(nèi)阻、剩余電量和老化系數(shù)在線監(jiān)測技術(shù)的研究,并設(shè)計適用于東莞電網(wǎng)的監(jiān)測系統(tǒng)。論文首先介紹蓄電池剩余電量Soc、老化系數(shù)Soh的定義,在目前核對性放電法測容量的基礎(chǔ)上使用安時定律,Peukert方程進行精確修正的方法。闡述了內(nèi)阻與剩余電量、老化系數(shù)的相關(guān)性及內(nèi)阻監(jiān)測優(yōu)點和局限性。重點研究兩種適用于變電站蓄電池的內(nèi)阻測試技術(shù):直流放電法、交流放電法。接下來論文研究蓄電池加速老化的內(nèi)部機理與外部因素,找到東莞電網(wǎng)在運維中影響蓄電池壽命的兩個關(guān)鍵點:運行環(huán)境溫度、浮充電壓,并確定在線監(jiān)測系統(tǒng)應監(jiān)測的5個關(guān)鍵特征量。第四章描述了在線監(jiān)測系統(tǒng)對于5個特征量的測試模塊設(shè)計、基于網(wǎng)絡(luò)化TCP/IP協(xié)議的系統(tǒng)方案。最后介紹東莞電網(wǎng)服役運行的幾套在線監(jiān)測裝置的應用情況,著重介紹系統(tǒng)的實時監(jiān)控、歷史數(shù)據(jù)查詢、狀態(tài)評價、充放電監(jiān)測等幾個功能模塊的使用,實現(xiàn)蓄電池組的遠程集中監(jiān)控管理。論文根據(jù)現(xiàn)有運維手段落后的現(xiàn)狀,有針對性的將蓄電池參數(shù)測試系統(tǒng)與網(wǎng)絡(luò)化計算機監(jiān)控系統(tǒng)相結(jié)合,蓄電池在線監(jiān)測系統(tǒng)的研發(fā)大大降低了蓄電池的維護成本,提高蓄電池組性能和可靠性,效果顯著。
[Abstract]:The valve-controlled sealed lead-acid battery (Valve Regulated Lead Acid Battery or VRLA), which is widely used in the standby power supply of substation, has been widely recognized in terms of performance. Its function is to provide the power of opening and closing operation for the important equipment such as circuit breaker in the station when the AC power supply is off. The reliability of the battery relates to the safety and stability of the power network, but there are many disadvantages in operation and maintenance, which make its performance lower and its life shorter. So it is the key to improve the reliability of the backup power supply to optimize the current operation and maintenance means and accurately grasp the performance state of the battery. The background of this paper is the battery used in Dongguan electricity website. The analysis principle and descriptive research method are used to study the on-line monitoring technology of battery internal resistance, residual electricity quantity and aging coefficient, and the monitoring system suitable for Dongguan power network is designed. This paper first introduces the definition of battery residual power Socand aging coefficient Soh. On the basis of the current checking discharge method the method of accurate correction by using the amperage law and Peukert equation is used. The correlation between internal resistance and residual electricity quantity, aging coefficient, advantages and limitations of internal resistance monitoring are expounded. This paper focuses on two kinds of internal resistance test techniques for substation batteries: DC discharge method and AC discharge method. Then the paper studies the internal mechanism and external factors of accelerated aging of battery, and finds two key points that affect battery life in Dongguan power grid: operating environment temperature, floating charge voltage, and so on. Five key characteristic quantities should be monitored in the online monitoring system. The fourth chapter describes the design of the online monitoring system for the test module of five features, and the system scheme based on the network TCP/IP protocol. Finally, this paper introduces the application of several on-line monitoring devices used in Dongguan power grid, with emphasis on the use of several functional modules, such as real-time monitoring, historical data query, status evaluation, charge and discharge monitoring, etc. The remote centralized monitoring and management of battery group is realized. According to the present situation of backward operation and maintenance methods, the paper combines the battery parameter testing system with the networked computer monitoring system. The research and development of the battery online monitoring system greatly reduces the battery maintenance cost. The performance and reliability of battery group are improved and the effect is remarkable.
【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM912;TM63

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相關(guān)期刊論文 前1條

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本文編號：2144006