中壓配網(wǎng)電壓偏差與波動綜合評估方法及其應(yīng)用
嚴(yán)利萍1,馬少華2,郜幔幔2,陳卓鋒3
(1 廣東電網(wǎng)公司惠州供電局,廣東 惠州 516001;
2 華南理工大學(xué) 電力學(xué)院,廣東 廣州 510640;3 廣州市奔流電力科技有限公司,廣東 廣州 510640)
摘 要:提出一種中壓配網(wǎng)電壓偏差與波動的綜合評估方法,以電壓分布特性和標(biāo)準(zhǔn)差反映電壓的偏差和波動情況。即獲取評估時間段內(nèi)各監(jiān)測點的實時電壓監(jiān)測值,求取其標(biāo)準(zhǔn)差以評估電壓波動大??;設(shè)計電壓偏差區(qū)間函數(shù),根據(jù)實際應(yīng)用需求和工程經(jīng)驗合理劃分電壓偏差區(qū)間并設(shè)置各區(qū)間權(quán)重得分;統(tǒng)計電壓監(jiān)測值位于各電壓偏差區(qū)間的概率,用各電壓偏差區(qū)間的概率與其權(quán)重得分的加權(quán)求和表征電壓偏差的分布情況;并采用序關(guān)系分析法和熵值法相結(jié)合的主客觀賦權(quán)法計算電壓偏差和電壓波動的綜合權(quán)重,對中壓配網(wǎng)各監(jiān)測點的電壓偏差和波動進(jìn)行綜合評估;實際例證驗證了該方法良好的工程應(yīng)用價值。
關(guān)鍵詞:中壓配網(wǎng);電壓偏差;電壓波動;綜合評估
中圖分類號:TM744 文獻(xiàn)標(biāo)識碼:A 文章編號:1007-3175(2016)09-0038-05
Comprehensive Voltage Deviation and Fluctuation Assessment Method andIts Application in Medium
Voltage Distribution Network
YAN Li-ping1, MA Shao-hua2, GAO Man-man2, CHEN Zhuo-feng3
(1 Huizhou Power Supply Bureau, Guangdong Power Grid, Huizhou 516001, China;
2 School of Electric Power, South China University of Technology, Guangzhou 510640, China;
3 Guangzhou Benliu Power Electric Technology Co., Ltd, Guangzhou 510640, China)
Abstract: This paper proposed a comprehensive assessment method of a kind of voltage deviation and fluctuation for medium voltage distribution network, based on the voltage distribution characteristic and the standard deviation to reflect voltage deviation and fluctuation. It meant that the measured value of voltages at each monitoring point could be collected in the evaluation period in real time and the standard deviation was calculated to evaluate the voltage fluctuation. The voltage deviation interval function was designed, in which voltage deviation interval will be divided reasonably and the weight score will be set according to the actual application requirement and engineering experience. This paper carried out statistics for the probability of voltage monitoring value at each voltage deviation interval. Distribution of voltage deviation was characterized as weighted sum of probability of voltage monitoring value at each voltage deviation interval. The synthesized weights of voltage deviation and fluctuation were determined via the sequence-relation analysis and entropy method, which were applied to comprehensive assessments of voltage deviation and fluctuation for medium voltage distribution network. The practical example illustration verifies the good engineering application value of this method.
Key words: medium voltage distribution network; voltage deviation; voltage fluctuation; comprehensive evaluation
參考文獻(xiàn)
[1] 王金麗,盛萬興,宋祺鵬,等. 配電網(wǎng)電能質(zhì)量智能監(jiān)控與治理仿真[J]. 電網(wǎng)技術(shù),2014,38(2):515-519.
[2] 劉俊華,羅隆福,張志文,許加柱. 基于模糊集對分析法的電能質(zhì)量綜合評估[J]. 電網(wǎng)技術(shù),2012,36(7):81-85.
[3] 周林,栗秋華,劉華勇,等. 用模糊神經(jīng)網(wǎng)絡(luò)模型評估電能質(zhì)量[J]. 高電壓技術(shù),2007,33(9):66-69.
[4] 李正明,施詩,潘天紅,陳武暉. 基于灰色關(guān)聯(lián)度和理想解法的電能質(zhì)量綜合評估方法[J]. 電力系統(tǒng)保護(hù)與控制,2014,42(6):14-19.
[5] 沈陽武,彭曉濤,施通勤,等. 基于最優(yōu)組合權(quán)重的電能質(zhì)量灰色綜合評價方法[J]. 電力系統(tǒng)自動化,2012,36(10):67-73.
[6] 歐陽森,石怡理. 改進(jìn)熵權(quán)法及其在電能質(zhì)量評估中的應(yīng)用[J]. 電力系統(tǒng)自動化,2013,37(21):156-159.
[7] 劉穎英, 徐永海, 肖湘寧. 地區(qū)電網(wǎng)電能質(zhì)量綜合評估新方法[J]. 中國電機(jī)工程學(xué)報,2008,28(22):130-136.
[8] 周林,栗秋華,張鳳. 遺傳投影尋蹤插值模型在電能質(zhì)量綜合評估中的應(yīng)用[J]. 電網(wǎng)技術(shù),2007,31(7):32-35.
[9] 李國棟,李庚銀,楊曉東,周明. 基于雷達(dá)圖法的電能質(zhì)量綜合評估模型[J]. 電力系統(tǒng)自動化,2010,34(14):70-74.
[10] 賈秀芳,趙霞. 電力市場環(huán)境下電壓質(zhì)量的綜合評價指標(biāo)[J]. 電網(wǎng)技術(shù),2007,31(11):59-62.
[11] 鄭建輝,陳鈺,孟昭勇. 電網(wǎng)電壓質(zhì)量評估的概率統(tǒng)計分析方法應(yīng)用研究[J]. 電力系統(tǒng)保護(hù)與控制,2009,37(8):58-62.
[12] 劉文濤,陳亦平,張昆. 基于概率統(tǒng)計的南方電網(wǎng)主網(wǎng)電壓質(zhì)量分析[J]. 南方電網(wǎng)技術(shù),2011,5(4):32-36.
[13] 陳陌,郭亞軍,于振明. 改進(jìn)型序關(guān)系分析法及其應(yīng)用[J]. 系統(tǒng)管理學(xué)報,2011,20(3):352-355.
[14] 孫利娟,邢小軍,周德群. 熵值賦權(quán)法的改進(jìn)[J].統(tǒng)計與決策,2010(21):153-154.