考慮暫態(tài)安全穩(wěn)定約束的受端電網(wǎng)緊急控制研究
發(fā)布時間：2018-11-27 12:50
【摘要】：我國負荷中心與能源資源中心的逆向分布,使得特高壓電網(wǎng)建設(shè)成為必然,東部地區(qū)受端電網(wǎng)特征日益明顯。特高壓交直流線路或大機組故障等導致大電源失去后,可能威脅受端電網(wǎng)的頻率安全性、電壓安全性,引發(fā)設(shè)備過載,造成一系列嚴重后果。為此需要對考慮暫態(tài)安全穩(wěn)定約束的受端電網(wǎng)緊急控制進行優(yōu)化,在確保系統(tǒng)安全的前提下,減少負荷損失量。本文主要研究內(nèi)容包括以下三點:(1)對事件驅(qū)動型切負荷(event-driven load shedding,EDLS)進行優(yōu)化。建立切負荷問題的數(shù)學模型,在一個統(tǒng)一框架內(nèi)考慮暫態(tài)頻率安全、暫態(tài)電壓安全和過載問題,提出迭代優(yōu)化算法:分別利用線性化方法和逐步累加法求解確保暫態(tài)頻率偏移安全(transient frequency deviation security,TFDS)/暫態(tài)電壓偏移安全(transient voltage deviation security,TVDS)和消除過載所需切負荷,通過整合迭代對總體切負荷量進行優(yōu)化。給出算法最優(yōu)解特點,并指出事件驅(qū)動原則更有利于保證系統(tǒng)安全。以IEEE39節(jié)點系統(tǒng)驗證了算法的有效性。證明在一個框架內(nèi)對考慮暫態(tài)安全和過載進行優(yōu)化,可減少負荷損失量。(2)協(xié)調(diào)優(yōu)化 EDLS 與矯正性線路投切(corrective line switching,CLS)。考慮CLS可在不造成負荷損失的情況下,減輕線路過載,因而協(xié)調(diào)其與EDLS,以優(yōu)化受端電網(wǎng)的緊急控制。首先建立了問題的數(shù)學模型,綜合考慮暫態(tài)安全問題與過載問題,協(xié)調(diào)EDLS與CLS。針對這一非線性、多階段、混合整數(shù)規(guī)劃(Mixed integer programming,MIP)問題,提出雙層迭代算法:內(nèi)層對EDLS進行優(yōu)化,外層利用鄰域搜索法協(xié)調(diào)兩種控制手段。指出該算法在線應(yīng)用前景。以改進后的IEEE39節(jié)點算例,驗證了算法有效性。證明了 EDLS與CLS協(xié)調(diào)優(yōu)化,豐富了受端電網(wǎng)緊急控制的手段,可減少負荷損失量。(3)設(shè)計開發(fā)受端電網(wǎng)緊急控制優(yōu)化程序。根據(jù)模塊化思想,設(shè)計該程序主要包含三個功能:暫態(tài)安全穩(wěn)定定量評估(含暫態(tài)頻率安全量化評估、暫態(tài)電壓安全量化評估和暫態(tài)功角穩(wěn)定性評估的實現(xiàn))、EDLS優(yōu)化、EDLS與CLS協(xié)調(diào)優(yōu)化。EDLS優(yōu)化模塊采用第二章迭代算法,給出其程序流程圖;在此基礎(chǔ)上,采用第三章雙層迭代算法,開發(fā)EDLS與CLS協(xié)調(diào)優(yōu)化模塊。分別以IEEE39節(jié)點算例、某省級電網(wǎng)算例和改進后的省級電網(wǎng)算例驗證各模塊的有效性,證明所開發(fā)程序可指導優(yōu)化考慮暫態(tài)安全穩(wěn)定約束的受端電網(wǎng)緊急控制決策。
[Abstract]:The reverse distribution of load center and energy resource center makes the construction of UHV power grid inevitable. The failure of UHV AC / DC line or large unit may threaten the safety of frequency and voltage of the receiving network and cause the overload of the equipment, which may result in a series of serious consequences. Therefore, it is necessary to optimize the emergency control of the receiving power network considering the transient security and stability constraints, and to reduce the load loss under the premise of ensuring the safety of the system. The main contents of this paper are as follows: (1) optimizing event-driven load cutting (event-driven load shedding,EDLS). The mathematical model of load shedding problem is established, and the transient frequency security, transient voltage security and overload problem are considered in a unified framework. An iterative optimization algorithm is proposed: the linearization method and the stepwise accumulation method are used to solve the problem of ensuring the safety of transient frequency migration (transient frequency deviation security,TFDS) / transient voltage migration (transient voltage deviation security,TVDS) and eliminating the load shedding required by overload, respectively. The overall load shedding is optimized by integrated iteration. The characteristics of the optimal solution of the algorithm are given, and the event-driven principle is pointed out to ensure the security of the system. The effectiveness of the algorithm is verified by IEEE39 node system. It is proved that the load loss can be reduced by optimizing the transient safety and overload in a frame. (2) the optimal EDLS is coordinated with the rectifying line switching (corrective line switching,CLS). Considering that CLS can reduce line overload without causing load loss, it can coordinate with EDLS, to optimize emergency control of terminal power network. Firstly, the mathematical model of the problem is established, and the transient security problem and overload problem are considered synthetically, and the EDLS and CLS. are coordinated. For this nonlinear, multi-stage, mixed integer programming (Mixed integer programming,MIP) problem, a two-layer iterative algorithm is proposed: the inner layer optimizes the EDLS and the outer layer coordinates the two control methods using the neighborhood search method. The prospect of online application of this algorithm is pointed out. The effectiveness of the proposed algorithm is verified by an improved IEEE39 node example. It is proved that the coordinated optimization of EDLS and CLS enriches the means of emergency control and reduces the load loss. (3) the optimization program of emergency control is designed and developed. According to the modularization idea, the program consists of three main functions: quantitative evaluation of transient security stability (including quantitative evaluation of transient frequency security, quantitative evaluation of transient voltage security, and realization of), EDLS optimization of transient power angle stability evaluation). EDLS and CLS coordinate optimization. Chapter 2 iterative algorithm is used in EDLS optimization module, and its program flow chart is given. On this basis, the optimization module of coordination between EDLS and CLS is developed by using the double level iterative algorithm in Chapter 3. The validity of each module is verified by IEEE39 node example, a provincial power network example and an improved provincial power network example, respectively. It is proved that the developed program can be used to guide the emergency control decision of the terminal power network with optimal consideration of transient security and stability constraints.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM712.12
本文編號：2360843
[Abstract]:The reverse distribution of load center and energy resource center makes the construction of UHV power grid inevitable. The failure of UHV AC / DC line or large unit may threaten the safety of frequency and voltage of the receiving network and cause the overload of the equipment, which may result in a series of serious consequences. Therefore, it is necessary to optimize the emergency control of the receiving power network considering the transient security and stability constraints, and to reduce the load loss under the premise of ensuring the safety of the system. The main contents of this paper are as follows: (1) optimizing event-driven load cutting (event-driven load shedding,EDLS). The mathematical model of load shedding problem is established, and the transient frequency security, transient voltage security and overload problem are considered in a unified framework. An iterative optimization algorithm is proposed: the linearization method and the stepwise accumulation method are used to solve the problem of ensuring the safety of transient frequency migration (transient frequency deviation security,TFDS) / transient voltage migration (transient voltage deviation security,TVDS) and eliminating the load shedding required by overload, respectively. The overall load shedding is optimized by integrated iteration. The characteristics of the optimal solution of the algorithm are given, and the event-driven principle is pointed out to ensure the security of the system. The effectiveness of the algorithm is verified by IEEE39 node system. It is proved that the load loss can be reduced by optimizing the transient safety and overload in a frame. (2) the optimal EDLS is coordinated with the rectifying line switching (corrective line switching,CLS). Considering that CLS can reduce line overload without causing load loss, it can coordinate with EDLS, to optimize emergency control of terminal power network. Firstly, the mathematical model of the problem is established, and the transient security problem and overload problem are considered synthetically, and the EDLS and CLS. are coordinated. For this nonlinear, multi-stage, mixed integer programming (Mixed integer programming,MIP) problem, a two-layer iterative algorithm is proposed: the inner layer optimizes the EDLS and the outer layer coordinates the two control methods using the neighborhood search method. The prospect of online application of this algorithm is pointed out. The effectiveness of the proposed algorithm is verified by an improved IEEE39 node example. It is proved that the coordinated optimization of EDLS and CLS enriches the means of emergency control and reduces the load loss. (3) the optimization program of emergency control is designed and developed. According to the modularization idea, the program consists of three main functions: quantitative evaluation of transient security stability (including quantitative evaluation of transient frequency security, quantitative evaluation of transient voltage security, and realization of), EDLS optimization of transient power angle stability evaluation). EDLS and CLS coordinate optimization. Chapter 2 iterative algorithm is used in EDLS optimization module, and its program flow chart is given. On this basis, the optimization module of coordination between EDLS and CLS is developed by using the double level iterative algorithm in Chapter 3. The validity of each module is verified by IEEE39 node example, a provincial power network example and an improved provincial power network example, respectively. It is proved that the developed program can be used to guide the emergency control decision of the terminal power network with optimal consideration of transient security and stability constraints.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM712.12
【參考文獻】
相關(guān)期刊論文 前10條
1 徐巖;郅靜;樊世通;;基于功率靈敏度和經(jīng)濟補償最小化的線路過負荷緊急控制方法[J];電力自動化設(shè)備;2017年01期
2 李兆偉;劉福鎖;崔曉丹;李威;王燕君;王珂;;計及電力安全事故風險的電網(wǎng)動態(tài)分區(qū)與切負荷協(xié)調(diào)控制研究[J];電力系統(tǒng)保護與控制;2017年01期
3 李順;廖清芬;劉滌塵;李昂;岑炳成;王佳麗;;基于WAMS的自適應(yīng)低頻減載動態(tài)優(yōu)化策略[J];電力系統(tǒng)保護與控制;2016年13期
4 徐巖;郅靜;;基于功率靈敏度的線路過載劃區(qū)域緊急控制策略[J];電工技術(shù)學報;2015年15期
5 鄒建林;安軍;穆鋼;邵廣惠;徐興偉;候凱元;岳涵;;基于軌跡靈敏度的電力系統(tǒng)暫態(tài)穩(wěn)定性定量評估[J];電網(wǎng)技術(shù);2014年03期
6 賈萌萌;丁劍;張建成;吳麗華;姜純;張啟雁;;弱受端小電網(wǎng)安控切負荷措施與低頻減載措施的配合方案[J];電力系統(tǒng)自動化;2014年01期
7 吳為;湯涌;孫華東;何劍;;利用實測響應(yīng)信息的暫態(tài)功角失穩(wěn)實時判別方法[J];中國電機工程學報;2013年34期
8 周曉寧;徐偉;胥傳普;王偉;徐泰山;毛俊;;計及負荷轉(zhuǎn)供措施的電網(wǎng)設(shè)備過載輔助決策[J];電力系統(tǒng)保護與控制;2013年23期
9 林濟鏗;潘光;李云鵬;熊衛(wèi)東;袁龍;劉濤;覃嶺;王旭東;;基于基本樹的網(wǎng)絡(luò)拓撲放射性快速判斷方法及配網(wǎng)重構(gòu)[J];中國電機工程學報;2013年25期
10 易楊;常寶立;李力;畢兆東;辛拓;譚偉;;PSD-BPA潮流計算數(shù)據(jù)卡的自動批量生成和修改[J];電力系統(tǒng)自動化;2013年10期
相關(guān)碩士學位論文 前1條
1 續(xù)昕;緊急切負荷與負荷轉(zhuǎn)供協(xié)調(diào)優(yōu)化控制研究[D];山東大學;2016年
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