本文選題：微電網(wǎng) + 動(dòng)態(tài)無(wú)功補(bǔ)償�。� 參考：《遼寧工業(yè)大學(xué)》2014年碩士論文

【摘要】：伴隨節(jié)能減排政策實(shí)施，新能源的大力開(kāi)發(fā)與綜合利用，微電網(wǎng)建設(shè)勢(shì)在必行。目前，微電網(wǎng)中無(wú)功電壓?jiǎn)栴}以及新能源低電壓穿越問(wèn)題凸顯，并已成為電力界在微電網(wǎng)中研究的熱點(diǎn)問(wèn)題。如何采用電力電子技術(shù)與控制技術(shù)解決上述問(wèn)題，具有理論意義與實(shí)用價(jià)值。本文針對(duì)微電網(wǎng)中考慮低電壓穿越問(wèn)題的無(wú)功補(bǔ)償器展開(kāi)研究。 為了有效的解決微電網(wǎng)中的無(wú)功不足、諧波干擾與微電源低電壓穿越問(wèn)題，深入研究動(dòng)態(tài)無(wú)功補(bǔ)償器的拓?fù)浣Y(jié)構(gòu)與工作原理，建立了考慮解決低電壓穿越問(wèn)題的動(dòng)態(tài)無(wú)功補(bǔ)償裝置模型。以瞬時(shí)功率理論為基礎(chǔ)，將瞬時(shí)無(wú)功電流檢測(cè)法與諧波電流檢測(cè)法相結(jié)合，本文提出了一種改進(jìn)的電流檢測(cè)方法。該方法通過(guò)對(duì)線(xiàn)路電流的采集，能夠?qū)⒕�(xiàn)路中的無(wú)功電流與諧波電流分量同時(shí)分離，在硬件電路結(jié)構(gòu)不變與運(yùn)算量相同的情況下，實(shí)現(xiàn)微電網(wǎng)綜合電流補(bǔ)償。針對(duì)微電網(wǎng)出現(xiàn)故障，導(dǎo)致低電壓穿越問(wèn)題的出現(xiàn)，利用綜合補(bǔ)償檢測(cè)方法對(duì)微電網(wǎng)故障進(jìn)行判斷，使無(wú)功補(bǔ)償裝置工作在電壓可調(diào)的逆變狀態(tài)，實(shí)現(xiàn)對(duì)微電源并網(wǎng)節(jié)點(diǎn)電壓的支撐，從而解決微電源低電壓穿越問(wèn)題。 采用遼寧工業(yè)大學(xué)微電網(wǎng)系統(tǒng)的實(shí)際數(shù)據(jù)，利用MATLAB/simulink仿真平臺(tái)，搭建了本文設(shè)計(jì)的無(wú)功補(bǔ)償裝置的仿真模型，仿真結(jié)果證明了，本文所用檢測(cè)方法的準(zhǔn)確性與無(wú)功補(bǔ)償裝置的有效性，，同時(shí)證明了無(wú)功補(bǔ)償裝置提高微電源低電壓穿越能力的可行性。
[Abstract]:With the implementation of energy saving and emission reduction policy and the development and comprehensive utilization of new energy, the construction of micro grid is imperative. At present, the problem of reactive voltage and low voltage traversing of new energy sources in microgrid is prominent, and has become a hot issue in the field of power research in microgrid. How to use power electronics technology and control technology to solve the above problems has theoretical significance and practical value. In this paper, the reactive power compensator considering low voltage traversing in microgrid is studied. In order to effectively solve the problem of reactive power shortage, harmonic interference and low voltage traversing of micro power supply, the topology and working principle of dynamic reactive power compensator are deeply studied. The model of dynamic reactive power compensator considering the problem of low voltage traversing is established. Based on the instantaneous power theory, an improved current detection method is proposed by combining the instantaneous reactive current detection method with the harmonic current detection method. By collecting the line current, the reactive current and harmonic current components in the line can be separated at the same time, and the integrated current compensation of microgrid can be realized under the condition that the hardware circuit structure is the same and the calculation is the same. Aiming at the problem of low voltage traversing caused by the fault of microgrid, the fault of microgrid is judged by comprehensive compensation detection method, and the reactive power compensator works in the state of voltage adjustable inverter. The low voltage traversing problem of micro power supply can be solved by supporting the node voltage of micro power supply. Based on the actual data of Liaoning University of Technology microgrid system and MATLAB/simulink simulation platform, the simulation model of reactive power compensation device designed in this paper is set up, and the simulation results prove that, The accuracy of the detection method used in this paper and the effectiveness of the reactive power compensation device are also proved. At the same time, the feasibility of the reactive power compensation device to improve the low voltage traversing ability of the micro power supply is proved.
【學(xué)位授予單位】：遼寧工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM761.12

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