本文選題：MMC + UPFC��； 參考：《華北電力大學(北京)》2017年碩士論文

【摘要】：基于模塊化多電平換流器(modular multilevel converter,MMC)的統(tǒng)一潮流控制器(unified power flow controller,UPFC)是適應高電壓大容量輸電的高度可控型靈活交流輸電系統(tǒng)裝置,其構成復雜,故障影響不容忽視,對接地設計及保護策略要求高。本文以基于MMC的UPFC接地方式及本體保護策略為核心,圍繞MMC-UPFC本體保護配置及配合、接地方式對故障特性及本體保護的影響、UPFC接入對系統(tǒng)保護的影響這三個部分開展研究。首先,本文介紹基于MMC的UPFC本體結構、工作原理及詳細保護區(qū)域劃分;結合上海MMC-UPFC示范工程進行仿真實驗,考慮閥控制保護影響,重點分析了幾種典型故障下的故障特性,指出傳統(tǒng)保護可能存在的問題。并針對上述問題,改進了并聯(lián)閥側短引線差動保護,T接線差動保護及串聯(lián)變壓器差動保護。其次,針對接地方式對故障特性與本體保護的影響,提出三種可行的交流側接地方式,分別為僅并聯(lián)變閥側中性點經(jīng)大電阻接地,僅串聯(lián)變閥側中性點經(jīng)大電阻接地及僅并聯(lián)變閥側中性點經(jīng)小電阻接地。進一步,結合示范工程系統(tǒng)參數(shù)與RTDS實時數(shù)字仿真實驗,詳細分析不同接地方式對故障特性與保護配置的影響,重點討論接地點位置對串聯(lián)變網(wǎng)側單相接地故障及對應保護配置影響,接地電阻阻值對閥側短引線單相接地故障、換流器橋臂單相接地故障及相應保護配置影響,最終得出MMC-UPFC較優(yōu)的接地方案。最后,針對UPFC接入對系統(tǒng)保護的影響,本文給出UPFC本體保護與系統(tǒng)保護的配合,根據(jù)示范工程實際需要,明確本體保護與系統(tǒng)保護的動作范圍。進一步,將UPFC模型簡化等效并仿真分析UPFC接入對故障特性的影響,搭建距離保護計算模型,比較UPFC不同接入地點、不同故障位置,距離保護不同原理情況下,線路首端保護安裝處測量電阻、測量電抗及距離保護動作情況,分析UPFC接入對線路距離保護的影響。
[Abstract]:The unified power flow controller based on modular multilevel converter (Modular multilevel convertor) is a highly controllable flexible AC transmission system for high voltage and large capacity transmission. Its structure is complex and the fault influence can not be ignored.High requirements for grounding design and protection strategy.This paper focuses on the UPFC grounding mode and the protection strategy based on MMC. It focuses on the configuration and cooperation of the MMC-UPFC ontology protection, the influence of the grounding mode on the fault characteristics and the impact of the MMC-UPFC access on the system protection.First of all, this paper introduces the structure, working principle and detailed protection area division of UPFC based on MMC, and analyzes the fault characteristics of several typical faults based on the simulation experiment of Shanghai MMC-UPFC demonstration project, considering the influence of valve control protection.The possible problems of traditional protection are pointed out.Aiming at the above problems, this paper improves the parallel valve side short lead differential protection and the series transformer differential protection.Secondly, in view of the influence of grounding mode on fault characteristics and body protection, three feasible AC side grounding methods are put forward, namely, only the neutral point of the side of the parallel variable valve is grounded by large resistance.Only the neutral point on the side of the series variable valve is grounded by large resistance and only the neutral point of the side of the parallel variable valve is grounded with small resistance.Furthermore, the effects of different grounding modes on fault characteristics and protection configuration are analyzed in detail by combining the system parameters of the demonstration project and the real-time digital simulation experiment of RTDS.This paper mainly discusses the influence of grounding point position on single-phase grounding fault and corresponding protection configuration of series transformer grid, the influence of grounding resistance value on valve side short lead single-phase grounding fault, commutator bridge arm single-phase grounding fault and corresponding protection configuration.Finally, the optimal grounding scheme of MMC-UPFC is obtained.Finally, aiming at the influence of UPFC access on system protection, this paper presents the cooperation of UPFC ontology protection and system protection. According to the actual needs of demonstration project, the scope of action between ontology protection and system protection is defined.Furthermore, the UPFC model is simplified and equivalent, and the influence of UPFC access on fault characteristics is simulated and analyzed. A distance protection calculation model is built to compare the different access locations, different fault locations and different principles of distance protection in UPFC.The resistance, reactance and distance protection action are measured at the first end of the line protection installation, and the influence of UPFC access on the line distance protection is analyzed.
【學位授予單位】：華北電力大學(北京)
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM761;TM77

【參考文獻】

相關期刊論文 前10條

1 陳剛;李鵬;袁宇波;;MMC-UPFC在南京西環(huán)網(wǎng)的應用及其諧波特性分析[J];電力系統(tǒng)自動化;2016年07期

2 祁萬春;楊林;宋鵬程;徐政;;南京西環(huán)網(wǎng)UPFC示范工程系統(tǒng)級控制策略研究[J];電網(wǎng)技術;2016年01期

3 本刊訊;;國內(nèi)首個自主知識產(chǎn)權UPFC工程在南京投運[J];電力與能源;2015年06期

4 凌峰;秦健;戴陽;何宏杰;黃如海;潘磊;;南京UPFC工程運行方式[J];江蘇電機工程;2015年06期

5 魯江;秦健;潘磊;董云龍;邱德鋒;黃如海;;南京UPFC工程控制保護系統(tǒng)架構與配置研究[J];江蘇電機工程;2015年06期

6 崔福博;郭劍波;荊平;宋潔瑩;周飛;潘冰;于弘洋;;MMC-UPFC接地設計及其站內(nèi)故障特性分析[J];中國電機工程學報;2015年07期

7 王寶安;譚風雷;商姣;;模塊化多電平換流器模塊冗余優(yōu)化配置方法[J];電力自動化設備;2015年01期

8 崔福博;宋潔瑩;周飛;蔣曉春;劉建坤;陳靜;;基于MMC的統(tǒng)一潮流控制器建模方法及其內(nèi)部動態(tài)特性仿真分析[J];智能電網(wǎng);2014年12期

9 宋潔瑩;馮獻強;崔福博;陸振綱;周飛;蔣曉春;;MMC-UPFC動態(tài)建模及內(nèi)部特性仿真研究[J];中國電機工程學報;2014年S1期

10 張建坡;趙成勇;黃曉明;陸翌;裘鵬;;基于模塊化多電平高壓直流輸電系統(tǒng)接地故障特性仿真分析[J];電網(wǎng)技術;2014年10期

相關碩士學位論文 前1條

1 季舒平;上海南匯柔性直流輸電示范工程關鍵技術研究[D];上海交通大學;2013年

，

本文編號：1768978