發(fā)布時(shí)間：2019-06-07 08:42

【摘要】：同步相量估計(jì)算法對(duì)同步相量測(cè)量單元(phasor measurement unit,PMU)的性能有重要影響,如何獲得準(zhǔn)確、實(shí)時(shí)性好、具有良好動(dòng)態(tài)性能的相量估計(jì)算法值得研究。為此,提出四分之三基波周期最小二乘(three-quarter fundamental period least squares,TQLS)相量估計(jì)算法。TQLS法的估計(jì)周期為四分之三基波周期,即對(duì)該時(shí)間窗內(nèi)的信號(hào)進(jìn)行采樣,根據(jù)公式推導(dǎo)的結(jié)論,可以得到采樣結(jié)果與基波相量之間的關(guān)系。利用最小二乘法,可以由采樣結(jié)果估計(jì)出相量。在整個(gè)估計(jì)過(guò)程中沒(méi)有泰勒級(jí)數(shù)展開(kāi)。理論分析表明,所提TQLS算法可以準(zhǔn)確估計(jì)基波相量,同時(shí),該算法在基頻附近頻率響應(yīng)的幅值平坦,可以準(zhǔn)確估計(jì)動(dòng)態(tài)相量。仿真結(jié)果分別從頻域和時(shí)域角度驗(yàn)證了TQLS算法的有效性,并且仿真結(jié)果顯示TQLS算法的計(jì)算量與傅里葉變換法相當(dāng)。
[Abstract]:Synchronous phasor estimation algorithm has an important influence on the performance of synchronous phasor measurement unit (phasor measurement unit,PMU). How to obtain accurate, real-time and good dynamic performance phasor estimation algorithm is worth studying. For this reason, a 3/4 fundamental period least square (three-quarter fundamental period least squares,TQLS) phasor estimation algorithm is proposed. The estimation period of the TQLS method is 3/4 fundamental period, that is, the signal in the time window is sampled, and according to the conclusion derived from the formula, The relationship between the sampling results and the fundamental phasor can be obtained. By using the least square method, the phasor can be estimated from the sampling results. There is no Taylor series expansion in the whole estimation process. Theoretical analysis shows that the proposed TQLS algorithm can accurately estimate the fundamental phasor. At the same time, the amplitude of the frequency response of the proposed algorithm is flat near the fundamental frequency, and the dynamic phasor can be accurately estimated. The simulation results verify the effectiveness of TQLS algorithm from the point of view of frequency domain and time domain, and the simulation results show that the computational complexity of TQLS algorithm is similar to that of Fourier transform method.
【作者單位】： 中國(guó)電力科學(xué)研究院;
【基金】：中國(guó)電力科學(xué)研究院科技創(chuàng)新項(xiàng)目(JL83-15-001)的資助
【分類(lèi)號(hào)】：TM933.313

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 顧麗鴻;周孝信;嚴(yán)劍峰;李芳;;特高壓聯(lián)網(wǎng)區(qū)域?qū)崟r(shí)小干擾穩(wěn)定分析策略[J];中國(guó)電機(jī)工程學(xué)報(bào);2010年13期

2 劉灝;畢天姝;楊奇遜;;數(shù)字濾波器對(duì)PMU動(dòng)態(tài)行為的影響[J];中國(guó)電機(jī)工程學(xué)報(bào);2012年19期

【共引文獻(xiàn)】

相關(guān)期刊論文 前10條

1 儲(chǔ)忠,章義剛,李秀娟,張林,閆復(fù)利;GPS在RTU中的應(yīng)用[J];合肥學(xué)院學(xué)報(bào)(自然科學(xué)版);2004年04期

2 姜曼;陳開(kāi)師;齊索妮;;同步發(fā)電機(jī)勵(lì)磁系統(tǒng)模型及參數(shù)自動(dòng)校核[J];華中電力;2011年06期

3 張建;江道灼;陳曉剛;;一種基于GPS的廣域電網(wǎng)運(yùn)行狀態(tài)監(jiān)測(cè)裝置[J];機(jī)電工程;2007年07期

4 路平,梁軍,，

本文編號(hào)：2494662