本文關(guān)鍵詞：微電網(wǎng)建模仿真研究及平臺(tái)開發(fā)，由筆耕文化傳播整理發(fā)布。

微電網(wǎng)建模仿真探討及平臺(tái)開發(fā)

微電網(wǎng)建模仿真探討及平臺(tái)開發(fā)

微電網(wǎng)是為整合分布式發(fā)電的優(yōu)勢(shì),削弱分布式發(fā)電對(duì)電網(wǎng)的沖擊和負(fù)面影響而提出的一種新的分布式能源組織方式和結(jié)構(gòu)。它通過(guò)整合分布式發(fā)電單碩博在線論文網(wǎng)與配電網(wǎng),在一個(gè)局部區(qū)域內(nèi)直接將分布式發(fā)電單碩博在線論文網(wǎng)、電力網(wǎng)絡(luò)和終端用戶聯(lián)系在一起,可以方便地進(jìn)行結(jié)構(gòu)和配置的優(yōu)化。結(jié)合冷熱電聯(lián)供方案,能夠提高能源利用效率,減輕能源動(dòng)力系統(tǒng)對(duì)環(huán)境的影響,推動(dòng)分布式電源上網(wǎng),推動(dòng)社會(huì)向綠色、環(huán)保、節(jié)能方向發(fā)展。無(wú)疑,微電網(wǎng)運(yùn)行將成為未來(lái)大型電網(wǎng)的有力補(bǔ)充和有效支撐,是未來(lái)電力系統(tǒng)的發(fā)展趨勢(shì)之一。本文以微電網(wǎng)建模仿真研究及平臺(tái)開發(fā)為主要內(nèi)容,重點(diǎn)工作主要集中在微電源建模及運(yùn)行特性淺析淺析、微電網(wǎng)仿真平臺(tái)開發(fā)及運(yùn)行特性淺析淺析、微電網(wǎng)運(yùn)行對(duì)電網(wǎng)綜合負(fù)荷模型的影響三個(gè)方面。文章首先詳細(xì)淺析淺析了各微電源的數(shù)學(xué)模型及其工作特性,利用了Simulink軟件構(gòu)建了簡(jiǎn)化固體氧化物燃料電池、光伏電池、風(fēng)力發(fā)電機(jī)、柴油發(fā)電機(jī)等微電源的仿真模型。根據(jù)各個(gè)微電源的不同特性,從不同的側(cè)重點(diǎn)對(duì)各微電源進(jìn)行了仿真淺析淺析。仿真結(jié)果表明本文所建立的各個(gè)微電源能夠反應(yīng)實(shí)際微電源的運(yùn)行情況,能夠適應(yīng)復(fù)雜微電網(wǎng)系統(tǒng)的建模需要。其次,淺析淺析比較了各種微電網(wǎng)制約對(duì)策的優(yōu)劣勢(shì),在此基礎(chǔ)上根據(jù)仿真平臺(tái)的需要,考慮了微電網(wǎng)在受到擾動(dòng)后的電壓頻率支撐不足,選取了V／f制約作為微電網(wǎng)的制約方式,利用Simulink軟件建立了基于電壓源型逆變器的V／f制約對(duì)策的詳細(xì)制約器模型,然后與已經(jīng)構(gòu)建的各微電源模型一起搭建了微電網(wǎng)的仿真平臺(tái)。考慮了微電網(wǎng)孤網(wǎng)運(yùn)行時(shí)系統(tǒng)功率不平衡不足,設(shè)計(jì)了一個(gè)二級(jí)負(fù)載來(lái)吸收系統(tǒng)中的不平衡功率,以確保系統(tǒng)在孤網(wǎng)運(yùn)行時(shí)能夠快速實(shí)現(xiàn)功率平衡；利用了三個(gè)典型的仿真算例,模擬了微電網(wǎng)的各種運(yùn)行狀態(tài),仿真結(jié)果表明：本文所構(gòu)建的微電網(wǎng)仿真平臺(tái)能夠承受較強(qiáng)的負(fù)荷投切沖擊,能夠抵御較為嚴(yán)重的三相接地短路故障,能夠?qū)崿F(xiàn)由孤網(wǎng)向并網(wǎng),由并網(wǎng)向孤網(wǎng)的不同運(yùn)行模式的平滑切換,并且具有較好的電能質(zhì)量。最后,文章選取了感應(yīng)電動(dòng)機(jī)+恒阻抗的綜合負(fù)荷模型對(duì)微電網(wǎng)不同運(yùn)行情況下得到的故障數(shù)據(jù)進(jìn)行了辨識(shí)淺析淺析。辨識(shí)結(jié)果表明微電網(wǎng)接入電網(wǎng)后,隨著其內(nèi)部的微電源出力的變化其對(duì)電網(wǎng)綜合負(fù)荷模型的影響有所不同,當(dāng)微電源出力較大時(shí),傳統(tǒng)的綜合負(fù)荷模型已不能表示其內(nèi)部的負(fù)荷特性,此時(shí)需要新的負(fù)荷模型來(lái)表示其負(fù)荷特性。本文能夠?yàn)槲㈦娋W(wǎng)研究提供良好的仿真手段。

【Abstract】 Microgrid is a proposed new organization and structure of the distributed energy to integrate the advantages of distributed generation,reduce the impact of distributed generation on the grid and negative impacts.It is through the integration of distributed generation units and the relationgship between the distributed network,directly to make the distributed power generation units,power networks and end users together in a local area.It can optimized the structure,and configuration easily. Combined with CCPH program,it can improve energy efficiency,reduce the impact of energy power systems on the enviroment, promote distributed power line, improve relability and to promote social to develepment to the green,environmental protection,energy saving.Undoubtedly, the microgrid will be the next large grid’s complements and effective support,and the future trend of power system.The main content of this paper is the modeling and simulation of Microgrid and platform development,it focus mainly on three parts:modeling of Micro-power and performance analysis,developing of Microgrid simulation platform and performance analysis,the impact of Microgird operation on the integrated load model.At first, various of micropower mathematical models and its features were analied, a simplified solid oxide fuel cell,photovoltaic cell, wind generation and diesel power generators models were build using Simulink software.According to the different characteristics of each micro-power, do simulation analysis to each micro-power from diferent emphases point, the simulation results show that the Micro-power models can simulate the actual operation very well,they ara able to adaptto complex modeling of Microgrid. Secondly, various control strategies of microgrid were detailed introducted and compared,on the basis of the demand of simulation platform, take into account the requirement of laboratory research projects and the voltage disturbance and frequency support, a voltage/frequence control strategy was choosed, a voltage source inverter with V/f control strategy was built by simulink software.Then a Microgrid simulation platform was built with micropower models and v/f controller model that bulit before.The problem of power imbalances when Microgrid isolated operation was considered,a secondary load to absorb the power imblance in the system was designed cleverly,it can balance the power quikly when the microgrid is isolated opertion. Three typical simulation examples were used to simulite all kinds of operation states of microgrid. It shows that the simulation platform can bear a strong impact on the load switching.It also can bear serious short-circuit fault conditions,and simulate the operation of microgrid from the grid to the island and from the island to the grid smoothly with good power quality.Finally,different kinds of fault data obtained from different Microgrid opertion were identified by induction motor with constant impedance load model.The results show that the Microgrid have different effects on the integrated load model when the output of micro-power changed. When the miro-power output is too large,the traditional integrated load model unable to response its internal load characteristics,and it need new model to reflect its load characteristics.The research in the paper provided a good simulation tool to the research of Microgrid.

【關(guān)鍵詞】 微電網(wǎng)； 微電源； V/f制約對(duì)策； 并網(wǎng)運(yùn)行； 孤網(wǎng)運(yùn)行； 仿真平臺(tái)；
【Key words】 Microgrid； Micro-power； Voltage/frequency control strategy； Grid-C onnected； Isolated operation； Simulation platform；

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  本文關(guān)鍵詞：微電網(wǎng)建模仿真研究及平臺(tái)開發(fā)，，由筆耕文化傳播整理發(fā)布。

本文編號(hào)：222150