本文選題：安全評(píng)估 + 事故預(yù)警�。� 參考：《華北電力大學(xué)》2015年碩士論文

【摘要】：加強(qiáng)電網(wǎng)監(jiān)控的智能化水平,可以有效預(yù)防大面積停電事故的發(fā)生,這是當(dāng)前“堅(jiān)強(qiáng)的智能電網(wǎng)”建設(shè)的重要任務(wù)之一。本文以河北南部電網(wǎng)為對(duì)象,研究系統(tǒng)的在線安全評(píng)估方法,并對(duì)可能發(fā)生的線路熱穩(wěn)定問題給出有針對(duì)性的預(yù)防控制措施,開發(fā)電力系統(tǒng)運(yùn)行風(fēng)險(xiǎn)的評(píng)估和早期預(yù)警系統(tǒng),系統(tǒng)的應(yīng)用將有助于加強(qiáng)電網(wǎng)運(yùn)行的監(jiān)控,進(jìn)而預(yù)防和避免大停電事故的發(fā)生。針對(duì)大型互聯(lián)電網(wǎng)的在線檢修評(píng)估問題,在對(duì)電力系統(tǒng)各個(gè)元件實(shí)時(shí)運(yùn)行狀態(tài)的統(tǒng)計(jì)分析基礎(chǔ)之上,研究了在線檢修方式下系統(tǒng)運(yùn)行風(fēng)險(xiǎn)的評(píng)估方法�；诠β瘦斔完P(guān)系分析,綜合考慮系統(tǒng)拓?fù)浣Y(jié)構(gòu)和運(yùn)行狀態(tài),提出了功率介數(shù)指標(biāo)用于辨識(shí)系統(tǒng)的關(guān)鍵線路和關(guān)鍵節(jié)點(diǎn)。通過對(duì)河北南網(wǎng)實(shí)時(shí)運(yùn)行數(shù)據(jù)的統(tǒng)計(jì)分析,確定了河北南網(wǎng)安全監(jiān)控的關(guān)鍵線路、節(jié)點(diǎn),并給出了在線檢修方式下的統(tǒng)計(jì)分析結(jié)果。針對(duì)系統(tǒng)運(yùn)行中的線路熱穩(wěn)定問題,提出一種基于靈敏度分析的預(yù)防控制優(yōu)化方法。該方法兼顧了電網(wǎng)的局部熱穩(wěn)定問題和全局的運(yùn)行水平,根據(jù)靈敏度分析、潮流熵和節(jié)點(diǎn)自身功率水平等提出節(jié)點(diǎn)功率調(diào)整綜合指標(biāo),進(jìn)而確定功率調(diào)整節(jié)點(diǎn)集和功率平衡節(jié)點(diǎn)集,通過對(duì)節(jié)點(diǎn)功率進(jìn)行多輪次調(diào)整,有效消除了線路熱穩(wěn)定問題。該方法通過河北南網(wǎng)中的實(shí)際應(yīng)用結(jié)果驗(yàn)證了其的有效性。研究開發(fā)了河北南網(wǎng)運(yùn)行風(fēng)險(xiǎn)評(píng)估與事故預(yù)警系統(tǒng)。分析了系統(tǒng)的總體需求并設(shè)計(jì)了系統(tǒng)架構(gòu),介紹了系統(tǒng)實(shí)現(xiàn)的過程、數(shù)據(jù)流程以及各模塊的功能,并詳細(xì)闡述了整個(gè)系統(tǒng)的開發(fā)和部署。所開發(fā)的電網(wǎng)運(yùn)行風(fēng)險(xiǎn)評(píng)估與事故預(yù)警系統(tǒng)可從D5000系統(tǒng)獲取數(shù)據(jù),并利用在線潮流計(jì)算結(jié)果,統(tǒng)計(jì)分析系統(tǒng)各種運(yùn)行指標(biāo),從電網(wǎng)穩(wěn)態(tài)運(yùn)行的角度,實(shí)現(xiàn)了河北南網(wǎng)在線的運(yùn)行風(fēng)險(xiǎn)評(píng)估與事故預(yù)警。
[Abstract]:Strengthening the intelligent level of power grid monitoring can effectively prevent the occurrence of large-scale power outages, which is an important Ren Wuzhi in the construction of "strong smart grid" at present.In this paper, taking the southern Hebei power grid as the object, the online security assessment method of the system is studied, and the preventive and control measures for the possible thermal stability of the transmission line are given, and the operational risk assessment and early warning system of the power system are developed.The application of the system will help to strengthen the monitoring of power grid operation, and then prevent and avoid the occurrence of power outages.Based on the statistical analysis of the real-time operation state of each component in power system, the evaluation method of system operation risk in on-line maintenance mode is studied, aiming at the problem of on-line maintenance evaluation of large-scale interconnected power network.Based on the analysis of power transmission relationship and considering the topology and operation state of the system, the power medium index is proposed to identify the key circuits and nodes of the system.Based on the statistical analysis of the real-time operation data of Hebei South Network, the key lines and nodes of Hebei South Network Security Monitoring are determined, and the results of statistical analysis under the online maintenance mode are given.Aiming at the thermal stability of the system, an optimization method of preventive control based on sensitivity analysis is proposed.This method takes into account the problem of local thermal stability and the overall operation level of the power network. According to the sensitivity analysis, the power flow entropy and the power level of the nodes themselves, a comprehensive index of node power adjustment is proposed.Furthermore, the power adjustment node set and the power balance node set are determined, and the thermal stability problem of the transmission line is effectively eliminated by adjusting the node power in multiple rounds.The effectiveness of this method is verified by the practical application results in Hebei South Network.The operational risk assessment and accident warning system of Hebei Southern Network are studied and developed.The overall requirement of the system is analyzed and the architecture of the system is designed. The process of the system implementation, the data flow and the functions of each module are introduced, and the development and deployment of the whole system are described in detail.The system can obtain data from D5000 system, and make use of on-line power flow calculation results, statistics and analysis of various operating indicators of the system, from the point of view of the steady operation of the power network, the system can obtain data from D5000 system.The operation risk assessment and accident warning of Hebei South Network are realized.
【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】：2015
【分類號(hào)】：TM732

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