【正文】 評(píng)閱教師簽字： 年 月 日 中國(guó)礦業(yè)大學(xué)畢業(yè)設(shè)計(jì)答辯及綜合成績(jī) 答 辯 情 況 提 出 問(wèn) 題 回 答 問(wèn) 題 正 確 基本 正確 有一般性錯(cuò)誤 有原則性錯(cuò)誤 沒(méi)有 回答 答辯委員會(huì)評(píng)語(yǔ)及建議成績(jī)： 答辯委員會(huì)主任簽字： 年 月 日 學(xué)院領(lǐng)導(dǎo)小組綜合評(píng)定成績(jī)： 學(xué)院領(lǐng)導(dǎo)小組 負(fù)責(zé)人： 年 月 日 摘 要 隨著工業(yè)水平的不斷提高，用戶對(duì)電能質(zhì)量的要求也越來(lái)越高。因此，實(shí)時(shí)快速的進(jìn)行 無(wú)功功率補(bǔ)償對(duì)優(yōu)化電網(wǎng)潮流分布和提高電能質(zhì)量具有十分重要的意義。 然后 ，重點(diǎn)闡述了靜止 同步補(bǔ)償器（ STATCOM）的電路結(jié)構(gòu)、工作原理以及在改善電能質(zhì)量中的具體應(yīng)用?？刂撇呗苑矫?，利用 直接電流控制技術(shù) ， 即采用跟蹤型 PWM控制技術(shù)對(duì)電流進(jìn)行直接控制。 關(guān)鍵詞： 無(wú)功優(yōu)化；靜止同步補(bǔ)償器； 直接電流控制 ABSTRACT With the improvement of industrial level,customers bee stricter with the power reactive load,especially the impulsive reactive load,not only increases power loss,but also deteriorates the power quality of customers seriously,so immediate reactive power pensation is a powerful means of optimizing power flow on transmission works as well as enhancing power quality. First， the paper introduces the importance of Reactive power optimization in district power systems and establishes the mathematical shows the flow of solution to reactive power optimization with applied by geic , The STATCOM circuit diagram and work principle as well as its applications are introduced in detail in this paper. The control strategies of STATCOM are also discussed in the paper. The dissertation determines the detection means —— dq transformation theory of vector control based on instantaneous reactive power. PWM control by tracking the current technology to achieve direct control,namely directcurrent , Simulation system is constructed for STATCOM with MATLAB simulation results are able to prove the presented STATCOM’s ability to pensate for reactive power,and to improve the power quality. Keywords ： reactive power optimization； static synchronous pensator ； directcurrent control 目 錄 1 緒論 ............................................................................................................................... 1 本課題的研究背景 ............................................................................................. 1 無(wú)功優(yōu)化補(bǔ)償?shù)囊饬x ......................................................................................... 1 配電網(wǎng)無(wú)功優(yōu)化的方法 ..................................................................................... 2 經(jīng)典的無(wú)功優(yōu)化算法 ................................................................................ 2 人工智能的無(wú)功優(yōu)化算法 ........................................................................ 3 主要無(wú)功補(bǔ)償裝置及其工作原理 ..................................................................... 4 并聯(lián)電容器 ................................................................................................ 4 同步調(diào)相機(jī) (Synchronous CondenserSC) ................................................ 5 靜止型無(wú)功補(bǔ)償裝置 (Static Var Compensator－ SVC) ........................... 6 靜止同步補(bǔ)償器（ Static Synchronous Compensator－ STATCOM） .... 8 STATCOM 國(guó)內(nèi)外研究 現(xiàn)狀 ................................................................................. 9 課題的目的，意義和任務(wù) ............................................................................... 10 2 配電網(wǎng)的無(wú)功優(yōu)化 ..................................................................................................... 11 無(wú)功優(yōu)化的數(shù)學(xué)模型 ....................................................................................... 11 約束方程 .................................................................................................. 11 目標(biāo)函數(shù) .................................................................................................. 12 遺傳算法 ........................................................................................................... 13 遺傳算法相關(guān)術(shù)語(yǔ) .................................................................................. 14 遺傳算法的應(yīng)用步驟 .............................................................................. 15 遺傳算法在無(wú)功優(yōu)化中的應(yīng)用 ....................................................................... 16 本章小結(jié) ........................................................................................................... 20 3 STATCOM 的工作原理及其應(yīng)用 ............................................................................ 21 STATCOM 電路的基本結(jié)構(gòu) ............................................................................... 21 STATCOM 基本工作原理 ................................................................................... 22 STATCOM 數(shù)學(xué)模型的建立 ............................................................................... 24 STATCOM 穩(wěn)定性分析 ....................................................................................... 27 STATCOM 在改善電能質(zhì)量中的應(yīng)用 ............................................................... 28 提高系統(tǒng)功率因數(shù) .................................................................................. 28 調(diào)節(jié)系統(tǒng)電壓 .......................................................................................... 28 本章小結(jié) ........................................................................................................... 29 4 STATCOM 控制策略的研究 ...................................................................................... 30 無(wú)功功率的檢測(cè)方法 ....................................................................................... 30 概述 ......................................................................................................... 30 基于瞬時(shí)無(wú)功功率理論的電流檢測(cè)技術(shù) ............................................. 30 STATCOM 的控制方法 ....................................................................................... 33 間接電流控制 .......................................................................................... 33 直接電流控制 .......................................................................................