本文選題：微電網(wǎng)　切入點：改進的電壓電流雙環(huán)控制　出處：《南京理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：微電網(wǎng)不僅能夠展現(xiàn)和發(fā)揮分布式發(fā)電的優(yōu)點,而且可以減小分布式發(fā)電對電網(wǎng)的沖擊和不利影響,它將地理分散、一次能源多種多樣的分布式電源整合在一個區(qū)域網(wǎng)絡(luò)里,并對網(wǎng)絡(luò)內(nèi)的電壓與能量進行統(tǒng)一地管理和調(diào)度,成為一種新穎的電力系統(tǒng)組織方式和結(jié)構(gòu)。 論文首先分析了三相全橋逆變器的電路拓撲結(jié)構(gòu),然后在此基礎(chǔ)上建立離散的平均狀態(tài)空間模型。在傳統(tǒng)電壓電流雙環(huán)控制方法的基礎(chǔ)上加入無差拍控制并將負載電流作為附加指令,提出了一種改進的電壓電流雙環(huán)控制策略。通過仿真驗證,改進的電壓電流雙環(huán)控制能夠及時追蹤參考指令,動態(tài)響應(yīng)能力快速,并具有良好的穩(wěn)定性。 然后研究了Vf控制器和PQ控制器的設(shè)計方法,搭建仿真模型并對參考電壓變化、參考功率變化以及改變負荷三種情況進行仿真,驗證了兩種控制器的有效性。除此之外,還對微電網(wǎng)主從控制策略進行建模仿真,得出所設(shè)計的Vf控制器能夠及時追蹤參考電壓,保證了離網(wǎng)運行時微電網(wǎng)電壓幅值和頻率穩(wěn)定；在并網(wǎng)運行時,分布式電源切換為PQ控制,能夠維持各自輸出功率按設(shè)定值穩(wěn)定運行。 接著分析了微電網(wǎng)下垂控制和倒下垂控制原理,并分別建立仿真模型,對投切負荷情況進行仿真,驗證了這兩種控制方法的有效性。然后采用對等控制對微電網(wǎng)并／離網(wǎng)兩種運行工況以及兩種工況切換進行仿真分析,仿真結(jié)果表明所設(shè)計的控制策略能夠使微電網(wǎng)穩(wěn)定運行。 最后針對傳統(tǒng)下垂控制方法的不足,設(shè)計了一種基于單神經(jīng)元自適應(yīng)PID控制的改進下垂控制器。在此基礎(chǔ)上建立模型并對投切負荷情況進行仿真,與采用傳統(tǒng)的下垂控制相比,得出了無論穩(wěn)態(tài)運行還是系統(tǒng)發(fā)生擾動,該下垂控制器均能體現(xiàn)出良好的魯棒性、跟蹤性能和動態(tài)響應(yīng)能力。
[Abstract]:Microgrid not only can show and play the advantages of distributed generation, but also can reduce the impact and adverse effects of distributed generation on the grid. And the voltage and energy in the network are managed and dispatching uniformly, which becomes a novel power system organization and structure. Firstly, the circuit topology of three-phase full-bridge inverter is analyzed. Then the discrete average state space model is established. The deadbeat control is added on the basis of the traditional voltage and current double loop control method and the load current is taken as the additional instruction. An improved double loop control strategy for voltage and current is proposed. The simulation results show that the improved double loop control can track the reference instructions in time, and the dynamic response is fast and has good stability. Then, the design method of VF controller and PQ controller is studied, and the simulation model is built, and the reference voltage change, reference power change and load change are simulated to verify the effectiveness of the two controllers. By modeling and simulating the master and slave control strategy of microgrid, it is concluded that the designed VF controller can track the reference voltage in time and ensure the stability of voltage amplitude and frequency in off-grid operation. The distributed power supply is switched to PQ control, which can keep the output power running stably according to the set value. Then, the principle of droop control and inverted droop control of microgrid are analyzed, and the simulation models are established to simulate the load shedding. The effectiveness of these two control methods is verified, and then the simulation analysis of two operating conditions and switching of two operating conditions is carried out by using peer-to-peer control. The simulation results show that the proposed control strategy can make the microgrid run stably. Finally, an improved sagging controller based on single neuron adaptive PID control is designed to overcome the shortcomings of traditional droop control methods. Compared with the traditional droop control, it is concluded that the sagging controller can show good robustness, tracking performance and dynamic response ability, regardless of the steady state operation or the disturbance of the system.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM727

【參考文獻】

相關(guān)期刊論文 前10條

1 紀(jì)明偉;陳杰;欒慶磊;;基于電流分解的微網(wǎng)功率控制策略研究[J];安徽建筑工業(yè)學(xué)院學(xué)報(自然科學(xué)版);2009年05期

2 謝開;劉明志;于建成;;中新天津生態(tài)城智能電網(wǎng)綜合示范工程[J];電力科學(xué)與技術(shù)學(xué)報;2011年01期

3 李立理;張義斌;葛旭波;;美國智能電網(wǎng)發(fā)展模式的系統(tǒng)分析[J];能源技術(shù)經(jīng)濟;2011年02期

4 丁道齊;;現(xiàn)代電網(wǎng)運行中的十個問題[J];電力系統(tǒng)自動化;1990年03期

5 王守相;李曉靜;肖朝霞;王成山;;含分布式電源的配電網(wǎng)供電恢復(fù)的多代理方法[J];電力系統(tǒng)自動化;2007年10期

6 魯宗相;王彩霞;閔勇;周雙喜;呂金祥;王云波;;微電網(wǎng)研究綜述[J];電力系統(tǒng)自動化;2007年19期

7 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)自動化;2008年07期

8 王成山;楊占剛;王守相;車延博;;微網(wǎng)實驗系統(tǒng)結(jié)構(gòu)特征及控制模式分析[J];電力系統(tǒng)自動化;2010年01期

9 高明杰;惠東;高宗和;雷為民;李建林;王銀明;;國家風(fēng)光儲輸示范工程介紹及其典型運行模式分析[J];電力系統(tǒng)自動化;2013年01期

10 楊志淳;劉開培;樂健;萬梓琳;王東旭;蘇毅;;孤島運行微電網(wǎng)中模糊PID下垂控制器設(shè)計[J];電力系統(tǒng)自動化;2013年12期

，

本文編號：1588547