本文選題：負(fù)荷辨識(shí) + 低電壓�。� 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：在季節(jié)性大負(fù)荷、日用電尖峰時(shí)段,城鄉(xiāng)結(jié)合部地區(qū)、農(nóng)村低壓400V臺(tái)區(qū)長(zhǎng)線(xiàn)路會(huì)因線(xiàn)路有功壓降過(guò)大在用戶(hù)側(cè)產(chǎn)生低電壓?jiǎn)栴}。低電壓?jiǎn)栴}的頻繁出現(xiàn)嚴(yán)重影響了居民的正常生活用電,阻礙著地區(qū)經(jīng)濟(jì)的發(fā)展。為了合理解決低電壓?jiǎn)栴},傳統(tǒng)的手段有400V臺(tái)區(qū)改造、加裝JP柜無(wú)功補(bǔ)償類(lèi)設(shè)備和串聯(lián)調(diào)壓器,或是對(duì)上級(jí)電網(wǎng)進(jìn)行線(xiàn)路串補(bǔ)技術(shù)和10kV線(xiàn)路加裝串聯(lián)調(diào)壓器等。但是傳統(tǒng)的400V臺(tái)區(qū)改造涉及經(jīng)濟(jì)性與需求性的要求,特定線(xiàn)路對(duì)于無(wú)功補(bǔ)償?shù)男枨蟛町愋暂^大。出于對(duì)配電網(wǎng)安全穩(wěn)定運(yùn)行的考慮,10-35kV串補(bǔ)技術(shù)和串聯(lián)調(diào)壓器的應(yīng)用目前相對(duì)較少,使得臺(tái)區(qū)總體的低電壓治理效果不是很理想。本文在對(duì)臺(tái)區(qū)低電壓?jiǎn)栴}的成因進(jìn)行分析后,將臺(tái)區(qū)低電壓?jiǎn)栴}的治理研究主要集中于對(duì)400V線(xiàn)路有功壓降過(guò)大而導(dǎo)致的低電壓?jiǎn)栴}進(jìn)行分析研究,具體研究治理低電壓?jiǎn)栴}的400V線(xiàn)路串聯(lián)調(diào)壓器方案。但是計(jì)及串聯(lián)調(diào)壓器對(duì)不同類(lèi)型負(fù)荷調(diào)壓效果不同,升壓時(shí)存在拉低首端電壓的情況,其低電壓治理效果難以保證�；谏鲜鰡�(wèn)題本文首先考慮400V臺(tái)區(qū)線(xiàn)路的實(shí)際接線(xiàn)形式,研究臺(tái)區(qū)配電線(xiàn)路的合理分段等效方法并建立臺(tái)區(qū)仿真模型,分析串聯(lián)調(diào)壓器接入對(duì)400V臺(tái)區(qū)電壓分布的影響;然后針對(duì)不同負(fù)荷模型對(duì)串聯(lián)調(diào)壓器調(diào)壓效果存在較大影響問(wèn)題,研究了以“四合一”計(jì)量數(shù)據(jù)為基礎(chǔ)的尖峰負(fù)荷類(lèi)型比重辨識(shí)方法,依據(jù)對(duì)負(fù)荷類(lèi)型比重的辨識(shí)建立臺(tái)區(qū)尖峰負(fù)荷模型�；诳柭鼮V波短期負(fù)荷預(yù)測(cè)原理,對(duì)臺(tái)區(qū)負(fù)荷類(lèi)型比重進(jìn)行了為期五天的預(yù)測(cè)分析,建立實(shí)例仿真模型并分析串聯(lián)調(diào)壓器不同位置接入對(duì)線(xiàn)路電壓變化影響。最后針對(duì)尖峰負(fù)荷下的串聯(lián)調(diào)壓器動(dòng)作特性,研究串聯(lián)調(diào)壓器接入點(diǎn)的合理選擇方法。最終,根據(jù)理論研究與仿真結(jié)論選取云南一實(shí)際存在低電壓?jiǎn)栴}的400V臺(tái)區(qū)接入了串聯(lián)調(diào)壓器。結(jié)合實(shí)際工程結(jié)果驗(yàn)證了本文研究方法的可行性。
[Abstract]:In the seasonal heavy load, the peak period of daily power consumption, the low voltage problem of the long line in the rural low voltage 400V area will be caused by the excessive active power drop of the line in the area of the combination of urban and rural areas. The frequent occurrence of low-voltage problem seriously affects the normal life of residents and hinders the development of regional economy. In order to solve the problem of low voltage reasonably, the traditional methods include the reconstruction of 400V unit, the installation of reactive power compensation equipment of JP cabinet and the series voltage regulator, or the line series compensation technology of superior power network and the installation of series voltage regulator on 10kV line, etc. But the traditional reconstruction of 400V station area involves the requirements of economy and demand, and the demand for reactive power compensation for specific lines is quite different. Due to the consideration of safe and stable operation of distribution network, the application of 10-35 kV series compensation technology and series voltage regulator is relatively few, which makes the overall low voltage control effect of the station area not very ideal. After analyzing the causes of the low voltage problem in the station area, the research on the treatment of the low voltage problem in the station area is mainly focused on the analysis and study of the low voltage problem caused by the excessive active power voltage drop on the 400V transmission line. This paper studies the scheme of 400 V line series voltage regulator to deal with low voltage problem. But considering that the voltage regulation effect of series voltage regulator is different to different types of load, the low voltage control effect is difficult to guarantee because of the situation that the voltage at the end of the voltage is lowered when the voltage is raised. Based on the above problems, this paper firstly considers the actual connection form of 400V transmission line, studies the reasonable section equivalent method of the distribution line in the station area and establishes the simulation model of the station area, and analyzes the influence of the connection of the series voltage regulator on the voltage distribution of the 400V station. Then, aiming at the problem that different load models have great influence on the voltage regulation effect of series voltage regulator, a method of identifying the proportion of peak load type based on "four-in-one" measurement data is studied. Based on the identification of the specific gravity of the load type, the peak load model of the station is established. Based on the Kalman filter short-term load forecasting principle, the paper makes a five-day forecasting analysis on the specific gravity of the load type in the station area, establishes a simulation model and analyzes the influence of the different position access of the series voltage regulator on the line voltage change. Finally, according to the operation characteristics of series voltage regulator under peak load, the reasonable selection method of the access point of series voltage regulator is studied. Finally, according to the theoretical research and simulation results, a 400V station with actual low voltage problem is selected to connect the series voltage regulator. The feasibility of the method is verified by practical engineering results.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM743;TM714.3

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