本文選題：分布式電源 + 諧波補償　； 參考：《華南理工大學》2014年碩士論文

【摘要】：非線性負載和分布式電源的突破式地發(fā)展帶來了一系列的電能質(zhì)量問題。在實際應用中，即使并網(wǎng)逆變器不向電網(wǎng)注入諧波，電網(wǎng)中的大量非線性負載仍然會導致電網(wǎng)電壓畸變。為了解決該問題，本文嘗試控制并網(wǎng)逆變器進行諧波補償，研究表明，在對并網(wǎng)逆變器合理控制和規(guī)劃的情況下，分布式電源就可以提高分布式電源的效率和電能質(zhì)量。 電壓源型逆變器的控制策略主要分為兩大類：電壓控制和電流控制。通常來說，有源電力濾波廣泛應用電流控制來抑制諧波干擾。然而，對于并網(wǎng)應用，尤其是考慮到孤島運行時，經(jīng)常用到例如V-f控制等電壓控制的方法，因為這種方法可以直接提供電壓和頻率補償。如此看來，傳統(tǒng)的有源濾波中所用的電流控制諧波補償策略難以直接用于并網(wǎng)逆變器控制。為了克服這個缺陷，本課題研究了一種基于電壓控制的諧波控制方法，即基于電壓控制的三相逆變器并網(wǎng)諧波控制策略，該方法可以跟電壓控制(如V-f控制、下垂控制等)分布式發(fā)電系統(tǒng)連接，這對微網(wǎng)中的電壓和頻率支持非常重要。 本文對傳統(tǒng)的基于電流控制的諧波抑制策略進行簡單的回顧。在此基礎上提出基于電壓控制的諧波抑制策略。與基于電流控制的諧波抑制策略相比，，這種方法在保證相同補償效果的前提下，更加靈活可靠，并且實現(xiàn)了與并網(wǎng)逆變器基于電壓控制的控制策略的融合。為了進一步驗證本文提出的方案，搭建了以TMS320F2812DSP為核心控制單元的硬件平臺，編寫了系統(tǒng)軟件程序，最后在實驗平臺上對方案進行了實驗研究。
[Abstract]:The breakthrough development of nonlinear load and distributed power has brought about a series of power quality problems.In practical applications, even if the grid-connected inverter does not inject harmonics into the grid, a large number of nonlinear loads in the power network will still lead to the voltage distortion of the grid.In order to solve this problem, this paper attempts to control the grid-connected inverter for harmonic compensation. The research shows that the efficiency and power quality of the distributed power supply can be improved by the reasonable control and planning of the grid-connected inverter.Voltage source inverter control strategy is divided into two main categories: voltage control and current control.In general, active power filter widely uses current control to suppress harmonic interference.However, voltage control methods such as V-f control are often used for grid-connected applications, especially considering the operation of isolated islands, because this method can directly provide voltage and frequency compensation.Therefore, the current control harmonic compensation strategy used in traditional active filter is difficult to be directly used in grid-connected inverter control.In order to overcome this shortcoming, this paper studies a harmonic control method based on voltage control, that is, the grid-connected harmonic control strategy of three-phase inverter based on voltage control, which can be matched with voltage control (such as V-f control).Sagging control, etc.) distributed generation system is connected, which is very important for voltage and frequency support in microgrid.In this paper, the traditional harmonic suppression strategy based on current control is reviewed briefly.On this basis, the harmonic suppression strategy based on voltage control is proposed.Compared with the harmonic suppression strategy based on current control, this method is more flexible and reliable on the premise of the same compensation effect, and realizes the fusion with the voltage control strategy of grid-connected inverter.In order to further verify the proposed scheme, the hardware platform with TMS320F2812DSP as the core control unit is built, and the system software program is written. Finally, the scheme is experimentally studied on the experimental platform.
【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM464

【參考文獻】

相關期刊論文 前2條

1 王小華;何怡剛;;基于神經(jīng)網(wǎng)絡的電力系統(tǒng)高精度頻率諧波分析[J];中國電機工程學報;2007年34期

2 郭小強;鄔偉揚;趙清林;王立喬;;三相并網(wǎng)逆變器比例復數(shù)積分電流控制技術[J];中國電機工程學報;2009年15期

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