本文關(guān)鍵詞：基于故障分量功率特征的電壓暫降源定位方法研究　出處：《西安科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 電壓暫降源定位 電能質(zhì)量監(jiān)測(cè)裝置 故障分量網(wǎng)絡(luò) 故障分量功率 故障分量序功率

【摘要】：電壓暫降影響供電的電能質(zhì)量,造成嚴(yán)重的經(jīng)濟(jì)損失;而且會(huì)引起供電方和用電方的經(jīng)濟(jì)糾紛。準(zhǔn)確的電壓暫降源定位,對(duì)判斷電壓暫降源在系統(tǒng)中的相對(duì)位置,及電力系統(tǒng)的安全、經(jīng)濟(jì)運(yùn)行具有重要的意義。本文針對(duì)短路故障引起的電壓暫降進(jìn)行定位研究。提出了基于故障分量功率的電壓暫降源定位方法。應(yīng)用線性電路疊加定理,將故障網(wǎng)絡(luò)分,解為穩(wěn)態(tài)網(wǎng)絡(luò)和故障分量網(wǎng)絡(luò);分析了故障分量瞬時(shí)功率的特征規(guī)律。提出了基于故障分量瞬時(shí)功率的電壓暫降源定位方法,若監(jiān)測(cè)到的故障分量瞬時(shí)功率為正,則電壓暫降源位于監(jiān)測(cè)裝置的上游;反之,若監(jiān)測(cè)到的故障分量瞬時(shí)功率為負(fù),則電壓暫降源位于下游。此方法主要用于對(duì)稱故障引起的電壓暫降。為解決故障分量功率定位法無(wú)法定位不對(duì)稱暫降的問(wèn)題,本文利用改進(jìn)的瞬時(shí)對(duì)稱分量法,將故障分量網(wǎng)絡(luò)分解為故障分量正序、負(fù)序和零序網(wǎng)絡(luò);定義故障分量序功率,分析了故障分量序功率的特征規(guī)律。提出了基于故障分量序功率的電壓暫降源定位方法,若監(jiān)測(cè)到的故障分量瞬時(shí)正序(負(fù)序)功率為正,則電壓暫降源位于監(jiān)測(cè)裝置的上游;反之,若監(jiān)測(cè)到的故障分量瞬時(shí)正序(負(fù)序)功率為負(fù),則電壓暫降源位于下游。此方法對(duì)不對(duì)稱故障和對(duì)稱故障引起的電壓暫降均能有效定位。研究了電壓暫降源的定位方案,融合兩種定位方法,選用運(yùn)算量更小的故障分量功率法定位對(duì)稱暫降,選用對(duì)任何暫降都能準(zhǔn)確定位的故障分量序功率法定位不對(duì)稱暫降。定位方案可準(zhǔn)確、快速的實(shí)現(xiàn)電壓暫降源定位。利用MATLAB/Simulink搭建雙電源供電系統(tǒng)模型,對(duì)不同故障點(diǎn)和各種不同短路類型進(jìn)行仿真分析。仿真結(jié)果表明文中所給出的定位方案對(duì)稱故障和不對(duì)稱故障引起的電壓暫降均能有效定位,定位準(zhǔn)確率高。
[Abstract]:The voltage sags affect the power quality of power supply, causing serious economic losses; and will cause the power supply side and the electricity side of the economic disputes. The accurate location of voltage sag source, to determine the relative position of the voltage sag source in the system, and the safety of the power system, the economic operation has important significance. According to the short circuit fault caused by voltage sag is proposed. The localization of voltage sags based on fault component of power source localization method. Application of superposition theorem, the solutions for the steady-state fault network, and network fault component network; analyzes the characteristics of instantaneous power fault component is proposed. The voltage instantaneous power failure component based on sag source location method, if the fault component instantaneous power monitoring is positive, upstream of the voltage sag source in the monitoring device; on the contrary, if the fault component instantaneous power monitoring is negative, then The voltage sag source located downstream. This method is mainly used for voltage sag caused by symmetrical fault. In order to solve the fault location method cannot locate the asymmetric component power sag problem, this paper uses the improved instantaneous symmetrical component method, the fault component network is decomposed into fault component positive sequence, negative sequence and zero sequence fault component sequence power network; definition analysis of the characteristics of fault component, sequence power was put forward. Based on sequence power fault voltage sag source location method, if the positive sequence fault component instantaneous monitoring to the (negative) power is upstream of the voltage sag source in the monitoring device; on the contrary, if the positive sequence fault component instantaneous monitoring to the (negative sequence power) is negative, then the voltage sag source located downstream. This method of asymmetric fault voltage and symmetrical fault caused by sags are effective positioning. Positioning square of voltage sag source case, fusion two Positioning method, positioning method using power fault component symmetrical smaller computational sag, the fault component sequence power asymmetry on any method can accurately locate the sag sag. Positioning scheme can accurately and quickly realize the voltage sag source location. The use of MATLAB/Simulink to build a double power supply system model for different fault and a variety of different fault types are simulated. The simulation results show that the voltage caused by symmetrical fault and asymmetric fault location scheme is given in the paper of the sag are effective positioning accuracy.

【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM714.2

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