本文選題：小水電機(jī)群 + 動(dòng)態(tài)等值��； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：水是清潔能源,而我國(guó)小水電資源的開(kāi)發(fā)潛力躍居世界第一位,若能充分利用小水電就地發(fā)電、供電,以及就地成網(wǎng)的優(yōu)越性,將會(huì)對(duì)我國(guó)經(jīng)濟(jì)和社會(huì)的可持續(xù)發(fā)展起到重要作用。眾多的小水電站接入電網(wǎng)之后,需要分析其對(duì)主網(wǎng)的影響�？紤]到小水電機(jī)群中機(jī)組數(shù)量較多,網(wǎng)絡(luò)結(jié)構(gòu)較復(fù)雜,在仿真用電網(wǎng)模型中若詳盡的考慮每一臺(tái)小水電機(jī)組的具體參數(shù),計(jì)算時(shí)可能會(huì)出現(xiàn)“維數(shù)災(zāi)”問(wèn)題,極大的降低仿真運(yùn)算分析的效率。而且大量的小水電機(jī)組中可能會(huì)出現(xiàn)參數(shù)未知或不準(zhǔn)確的情況,同時(shí)考慮到小水電機(jī)組出力受季節(jié)性影響較大,很難以用固定參數(shù)的模型去等值代替。所以,對(duì)區(qū)域小水電機(jī)群進(jìn)行動(dòng)態(tài)等值分析有著非常重要的現(xiàn)實(shí)意義,即把小水電機(jī)群當(dāng)作外部系統(tǒng),視為一個(gè)整體分析其對(duì)研究系統(tǒng)的影響。本文中針對(duì)區(qū)域小水電機(jī)群集中上網(wǎng)的問(wèn)題提出了一種動(dòng)態(tài)等值建模方法,該方法是基于發(fā)電機(jī)同調(diào)等值和系統(tǒng)辨識(shí)的思想建立起小水電機(jī)群的等值模型,然后利用聯(lián)絡(luò)線上的動(dòng)態(tài)潮流信息辨識(shí)出等值模型的參數(shù),主要內(nèi)容有以下幾點(diǎn):(1)通過(guò)比較現(xiàn)有的動(dòng)態(tài)等值方法和等值模型,針對(duì)區(qū)域小水電機(jī)群集中并網(wǎng)的問(wèn)題,提出了一種動(dòng)態(tài)等值建模方法,并詳細(xì)闡述了該方法的原理及思路。(2)通過(guò)歸納總結(jié)小水電機(jī)組的特點(diǎn),提出了基于電氣距離的發(fā)電機(jī)群劃分方法,并建立了區(qū)域小水電機(jī)群的等值模型——虛擬同步發(fā)電機(jī)(VSG)模型,同時(shí)給出了模型的實(shí)用方程。(3)通過(guò)等值模型的數(shù)學(xué)方程,對(duì)模型參數(shù)的可辨識(shí)性進(jìn)行了分析;提出了基于聯(lián)絡(luò)線動(dòng)態(tài)潮流數(shù)據(jù)的參數(shù)辨識(shí)方法,詳細(xì)介紹了如何基于同步相量測(cè)量單元(PMU)的實(shí)測(cè)數(shù)據(jù),轉(zhuǎn)換得到辨識(shí)所需的動(dòng)態(tài)響應(yīng)數(shù)據(jù)。(4)通過(guò)分析比較基本粒子群算法(PSO)中各參數(shù)的意義和作用,提出了一種采用更多粒子位置信息進(jìn)行變異操作的改進(jìn)粒子群優(yōu)化算法,利用改進(jìn)的PSO辨識(shí)出VSG模型的參數(shù);并通過(guò)編程得以實(shí)現(xiàn),最后在單機(jī)系統(tǒng)中驗(yàn)證了該算法的有效性。本文提出的動(dòng)態(tài)等值建模方法已在IEEE10機(jī)39節(jié)點(diǎn)系統(tǒng)中進(jìn)行了驗(yàn)證,同時(shí)也對(duì)實(shí)際的四川電網(wǎng)區(qū)域小水電機(jī)群進(jìn)行了仿真分析,結(jié)果表明了該建模方法的可行性,為區(qū)域發(fā)電機(jī)群的在線動(dòng)態(tài)等值建模奠定了基礎(chǔ)。
[Abstract]:Water is a clean energy source, and the potential of small hydropower resources in China has leapt to the first place in the world. If we can make full use of small hydropower to generate electricity, supply electricity, and network locally, It will play an important role in the sustainable development of our economy and society. After many small hydropower stations are connected to the power grid, it is necessary to analyze its influence on the main network. Considering the large number of units in the small hydropower cluster and the complexity of the network structure, if the detailed parameters of each small hydropower unit are considered in detail in the simulation power network model, the problem of "dimension disaster" may occur in the calculation. The efficiency of simulation analysis is greatly reduced. Moreover, there may be unknown or inaccurate parameters in a large number of small hydropower units. Considering that the output force of small hydropower units is greatly affected by seasonality, it is difficult to replace it with the model with fixed parameters. Therefore, it is of great practical significance to analyze the dynamic equivalence of regional small hydropower cluster, that is, to treat the small hydropower cluster as an external system and as a whole to analyze its influence on the research system. In this paper, a dynamic equivalent modeling method is proposed to solve the problem of centralized access to the network of regional small hydropower cluster. This method is based on the idea of generator homology equivalence and system identification to establish the equivalent model of small hydropower cluster. Then the parameters of the equivalent model are identified by using the dynamic power flow information on the tie-line. The main contents are as follows: (1) by comparing the existing dynamic equivalence methods and equivalent models, we aim at the problem of centralized grid connection of regional small hydropower clusters. In this paper, a dynamic equivalent modeling method is proposed, and the principle and train of thought of this method are described in detail. By summing up the characteristics of small hydropower units, a method of generator group partition based on electrical distance is put forward. An equivalent model of regional small hydropower cluster, virtual synchronous generator (VSGG) model, is established. At the same time, the practical equation of the model is given, and the identifiability of the model parameters is analyzed through the mathematical equation of the equivalent model. A parameter identification method based on tie-line dynamic power flow data is proposed, and how to measure the measured data based on synchronous phasor measurement unit (PMU) is introduced in detail. By analyzing and comparing the significance and function of the parameters in PSO, an improved particle swarm optimization (PSO) algorithm using more information of particle position for mutation operation is proposed. The parameters of VSG model are identified by improved PSO, and realized by programming. Finally, the validity of the algorithm is verified in a single computer system. The dynamic equivalent modeling method proposed in this paper has been verified in the IEEE 10 machine 39 bus system. At the same time, the simulation analysis of the small hydropower cluster in Sichuan power network area has also been carried out. The results show that the method is feasible. It lays a foundation for online dynamic equivalent modeling of regional generator group.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TV742;TV734

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 胡家聲,郭創(chuàng)新,曹一家;基于擴(kuò)展粒子群優(yōu)化算法的同步發(fā)電機(jī)參數(shù)辨識(shí)[J];電力系統(tǒng)自動(dòng)化;2004年06期

2 滕林,劉萬(wàn)順,李貴存,鄭濤;一種基于搖擺曲線的電力系統(tǒng)同調(diào)機(jī)群識(shí)別新方法[J];電力自動(dòng)化設(shè)備;2002年04期

，

本文編號(hào)：2041942