本文選題：智能變電站 + 一體化電源�。� 參考：《電子科技大學(xué)》2016年碩士論文

【摘要】：智能變電站一體化電源是智能變電站中的重要組成部分之一,為電力系統(tǒng)中的繼電保護(hù)裝置、信號(hào)傳送裝置等重要負(fù)載的穩(wěn)定運(yùn)行供應(yīng)安全可靠的工作電源。一體化電源能否穩(wěn)定可靠工作關(guān)乎整個(gè)電網(wǎng)的安全生產(chǎn)。由于一體化電源在變電站中是長期處于工作狀態(tài),隨著外部環(huán)境逐漸發(fā)生變化,電纜絕緣材料會(huì)出現(xiàn)損傷和老化,而設(shè)備本身在運(yùn)行過程中難免會(huì)出現(xiàn)一些大大小小的質(zhì)量問題,某些絕緣性能不佳的元件絕緣下降,進(jìn)一步造成直流系統(tǒng)出現(xiàn)直接接地等嚴(yán)重故障。智能變電站一體化電源絕緣檢測裝置是用于對(duì)直流電源系統(tǒng)支路母線正極或負(fù)極接地、交流電源竄入直流系統(tǒng)等故障造成的電壓異常進(jìn)行監(jiān)測和預(yù)警的專用裝置,其重要性顯而易見。由于我國的智能變電站一體化電源絕緣監(jiān)測裝置技術(shù)規(guī)范多年來并不完善,當(dāng)下智能變電站中在運(yùn)的絕緣檢測裝置在性能上尚不能完全達(dá)到與新頒標(biāo)準(zhǔn)的要求。因此,本文研究了一臺(tái)全新的智能變電站一體化電源的絕緣檢測裝置。該裝置基于直流漏電流法和平衡電橋法結(jié)合的原理和差分電壓法,采用FPGA+ARM的系統(tǒng)架構(gòu)。本文先后完成了采樣電路、通訊單元、數(shù)據(jù)存儲(chǔ)單元、人機(jī)交互單元、電源系統(tǒng)等功能模塊的硬件設(shè)計(jì)以及ARM系統(tǒng)軟件的設(shè)計(jì),實(shí)現(xiàn)了電壓采集,漏電流測量,交流竄入直流檢測、絕緣電阻自動(dòng)測量和結(jié)果顯示等功能。最后,在實(shí)驗(yàn)室模擬實(shí)際變電站一體化電源可能發(fā)生的多種故障場景測試了絕緣檢測裝置的性能。實(shí)驗(yàn)結(jié)果表明智能變電站一體化電源絕緣檢測裝置具備對(duì)智能變電站一體化電源各種絕緣狀況進(jìn)行有效檢測的能力。
[Abstract]:Intelligent substation integrated power supply is one of the important components of intelligent substation. It provides safe and reliable working power for the stable operation of important load such as relay protection device and signal transmission device in power system. Whether the integrated power supply can work stably and reliably is related to the safety production of the whole power grid. Because the integrated power supply is in the working state for a long time in the substation, with the change of the external environment gradually, the cable insulation material will appear damage and aging. However, some large and small quality problems will inevitably occur in the operation of the equipment itself, and the insulation of some components with poor insulation performance will drop, which will further cause serious faults such as direct grounding in the DC system. Intelligent substation integrated power source insulation detection device is a special device for monitoring and warning voltage anomalies caused by DC power system branch bus positive or negative pole grounding, AC power supply into DC system and other faults. Its importance is obvious. Because the technical specification of integrated power source insulation monitoring device of intelligent substation in our country has not been perfect for many years, the insulation detection device in operation in intelligent substation at present can not fully meet the requirements of new standard in performance. Therefore, a new insulation detection device for integrated power supply of intelligent substation is studied in this paper. Based on the principle of combining DC leakage current method with balanced bridge method and differential voltage method, the system architecture of FPGA ARM is adopted. This paper has completed the hardware design of sampling circuit, communication unit, data storage unit, man-machine interaction unit, power supply system and ARM system software, realized voltage acquisition, leakage current measurement, etc. Ac docking DC detection, insulation resistance automatic measurement and results display and other functions. Finally, the performance of insulation detection device is tested in laboratory simulation of various fault scenarios that may occur in actual substation integrated power supply. The experimental results show that the intelligent substation integrated power source insulation detection device has the ability to effectively detect all kinds of insulation conditions of intelligent substation integrated power supply.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TM76;TM63

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