本文選題：分布式電源 + 微網(wǎng)�。� 參考：《湖南大學(xué)》2014年碩士論文

【摘要】：隨著國(guó)民經(jīng)濟(jì)的迅猛發(fā)展，人類對(duì)電力的需求日益增大，然而能源危機(jī)和環(huán)境污染也日益加重，促進(jìn)了人類對(duì)可再生能源發(fā)電技術(shù)的研究。由于可再生能源的分散性、多樣性和隨機(jī)性，分布式發(fā)電技術(shù)成為其必然的網(wǎng)絡(luò)結(jié)構(gòu)。近年來(lái)，分布式發(fā)電技術(shù)以其能源利用率高、污染小、可靠性高等特點(diǎn)受到了廣泛關(guān)注，為了減少分布式電源接入對(duì)主網(wǎng)的不利影響，最大限度的發(fā)揮其優(yōu)勢(shì)，專家們提出了微網(wǎng)的概念。 微網(wǎng)主要由多個(gè)分布式微源、電力電子變換裝置、儲(chǔ)能裝置、保護(hù)及負(fù)荷控制等設(shè)備構(gòu)成。大多數(shù)分布式微源以逆變器作為接口接入微網(wǎng)，，因此多逆變器型微網(wǎng)的運(yùn)行控制及其電能質(zhì)量分析與控制是微網(wǎng)研究的關(guān)鍵技術(shù)，本文是在自然科學(xué)基金重點(diǎn)項(xiàng)目《微網(wǎng)多逆變器并聯(lián)及電能質(zhì)量控制方法研究》的資助下完成的，研究?jī)?nèi)容主要涉及到：逆變器接口微源的控制策略，微網(wǎng)多逆變器并聯(lián)電壓不平衡控制方法，以及兩臺(tái)三相逆變器并聯(lián)系統(tǒng)實(shí)驗(yàn)平臺(tái)研制。 （1）從微網(wǎng)多逆變器并聯(lián)運(yùn)行入手，對(duì)基于功率下垂控制的多逆變器并聯(lián)控制策略進(jìn)行分析。以含兩個(gè)分布式發(fā)電單元的微網(wǎng)逆變器并聯(lián)系統(tǒng)為例，推導(dǎo)了并聯(lián)逆變器等效輸出阻抗呈感性和阻性情況下的下垂特性表達(dá)式，以及基于電感電流前饋的電壓電流雙環(huán)控制的逆變器輸出阻抗表達(dá)式；分析了引入虛擬阻抗的改進(jìn)型功率下垂控制方法。 （2）針對(duì)負(fù)載接入不對(duì)稱，從而導(dǎo)致微電網(wǎng)電壓出現(xiàn)不平衡，影響微電網(wǎng)穩(wěn)定性及用電設(shè)備正常工作的情況，提出了一種αβ坐標(biāo)系下的微電網(wǎng)多逆變器并聯(lián)電壓不平衡補(bǔ)償方法。該方法包括不平衡補(bǔ)償環(huán)、下垂控制環(huán)、虛擬阻抗環(huán)及電壓電流環(huán)四個(gè)部分。在引入虛擬阻抗的改進(jìn)型功率下垂控制基礎(chǔ)上，通過(guò)檢測(cè)三相基波正負(fù)序電壓和電流，并引入一個(gè)負(fù)序無(wú)功電導(dǎo)Q--G不平衡下垂控制環(huán)，合成并修正指令電流參考值，以實(shí)現(xiàn)微電網(wǎng)電壓的不平衡補(bǔ)償。電壓電流控制環(huán)采用比例諧振PR控制以實(shí)現(xiàn)電壓電流的無(wú)靜差控制。通過(guò)Matlab/Simulink仿真驗(yàn)證了所提的控制方法的正確性和有效性。 （3）介紹了兩臺(tái)三相逆變器并聯(lián)系統(tǒng)實(shí)驗(yàn)平臺(tái)軟硬件的設(shè)計(jì)與實(shí)現(xiàn)，通過(guò)對(duì)所開(kāi)發(fā)的樣機(jī)進(jìn)行測(cè)試，從實(shí)驗(yàn)結(jié)果可以看出，所提出的控制方法不會(huì)對(duì)功率均分效果造成影響，并且可以平衡分布式電源的輸出電壓，能有效的進(jìn)行功率控制和電壓不平衡補(bǔ)償，動(dòng)態(tài)性能良好，驗(yàn)證了該方法的正確性和有效性。
[Abstract]:With the rapid development of the national economy, the human demand for electricity is increasing. However, the energy crisis and environmental pollution are becoming more and more serious, which promotes the research of renewable energy generation technology. Because of the dispersion, diversity and randomness of renewable energy, distributed power generation technology becomes the inevitable network structure. In recent years, distributed power generation technology has attracted wide attention because of its high energy efficiency, low pollution, high reliability and so on. In order to reduce the adverse impact of distributed power access on the main network, it can maximize its advantages. Experts put forward the concept of microgrid. The microgrid consists of a number of distributed microsources, power electronic conversion devices, energy storage devices, protection and load control equipment. Most distributed microsources use the inverter as the interface to access the microgrid, so the operation control and power quality analysis and control of the multi-inverter microgrid are the key technologies of the microgrid research. This paper is completed with the support of Natural Science Foundation's key project, "study on parallel connection of microgrid multi-inverter and study of power quality control method". The research content mainly involves: control strategy of inverter interface micro-source, The parallel voltage imbalance control method of microgrid multi-inverter and the experimental platform of two three-phase inverter parallel systems are developed. 1) starting from the parallel operation of microgrid multi-inverter, the parallel control strategy of multi-inverter based on power droop control is analyzed. Taking the parallel system of microgrid inverter with two distributed generation units as an example, the droop characteristic expression of parallel inverter with equivalent output impedance with inductance and resistance is derived. The output impedance expression of voltage and current double loop control based on inductance current feedforward is presented, and the improved power droop control method with virtual impedance is analyzed. In view of the asymmetry of load access, which leads to the imbalance of microgrid voltage, which affects the stability of microgrid and the normal operation of power equipment, this paper proposes a method for compensating the voltage imbalance of microgrid multi-inverter in 偽 尾 coordinate system. The method includes four parts: unbalanced compensation loop, droop control loop, virtual impedance loop and voltage current loop. Based on the improved power droop control with virtual impedance, the reference value of instruction current is synthesized and corrected by detecting the positive and negative sequence voltage and current of three-phase fundamental wave, and introducing a negative sequence reactive conductance Q G unbalanced droop control loop. In order to realize the unbalanced compensation of microgrid voltage. The voltage and current control loop adopts proportional resonance PR control to realize the voltage and current control without static difference. The correctness and effectiveness of the proposed control method are verified by Matlab/Simulink simulation. This paper introduces the design and implementation of the hardware and software of the experiment platform of two three-phase inverters parallel system. Through the test of the developed prototype, it can be seen from the experimental results that the proposed control method will not affect the effect of power equalization. It can balance the output voltage of the distributed power supply, and can effectively control the power and compensate the voltage imbalance. The dynamic performance is good, and the correctness and effectiveness of the method are verified.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM464

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 成志秀;王曉麗;;太陽(yáng)能光伏電池綜述[J];信息記錄材料;2007年02期

2 葉昌林;燃料電池發(fā)電技術(shù)綜述[J];東方電氣評(píng)論;2000年02期

3 古斌;譚建成;;基于瞬時(shí)功率理論的新型功率方向元件[J];電工技術(shù)學(xué)報(bào);2010年02期

4 侯明;衣寶廉;;燃料電池技術(shù)發(fā)展現(xiàn)狀與展望[J];電化學(xué);2012年01期

5 陳晶晶;陳敏;姚瑋;錢(qián)照明;;無(wú)線并聯(lián)逆變器的輸出阻抗設(shè)計(jì)[J];電力電子技術(shù);2007年12期

6 呂志鵬;羅安;榮飛;郭镥;;電網(wǎng)電壓不平衡條件下微網(wǎng)PQ控制策略研究[J];電力電子技術(shù);2010年06期

7 袁清芳,李興源;具有串聯(lián)補(bǔ)償作用故障限流器的模糊穩(wěn)定控制器[J];電力系統(tǒng)自動(dòng)化;2004年03期

8 王建;李興源;邱曉燕;;含有分布式發(fā)電裝置的電力系統(tǒng)研究綜述[J];電力系統(tǒng)自動(dòng)化;2005年24期

9 王成山;肖朝霞;王守相;;微網(wǎng)綜合控制與分析[J];電力系統(tǒng)自動(dòng)化;2008年07期

10 王成山;王守相;;分布式發(fā)電供能系統(tǒng)若干問(wèn)題研究[J];電力系統(tǒng)自動(dòng)化;2008年20期

本文編號(hào)：1965314