【正文】 學(xué)校代號(hào) 10532 學(xué) 號(hào) S08094039 分 類 號(hào) TM714 密 級(jí) 公開 碩士學(xué)位論文高滲透率下光伏電源并網(wǎng)電能質(zhì)量問題及其交互影響研究學(xué)位申請(qǐng)人姓名 康 珍培 養(yǎng) 單 位 電氣與信息工程學(xué)院導(dǎo)師姓名及職稱 羅安 教授學(xué) 科 專 業(yè) 控制科學(xué)與工程研 究 方 向 分布式發(fā)電技術(shù)及應(yīng)用論文提交日期 2011年 4月29日學(xué)校代號(hào)：10532學(xué)號(hào)：S08094039密級(jí)：公開湖南大學(xué)碩士學(xué)位論文高滲透率下光伏電源并網(wǎng)電能質(zhì)量問題及其交互影響研究學(xué)位申請(qǐng)人姓名： 康 珍 導(dǎo)師姓名及職稱： 羅 安 教授 培養(yǎng)單位： 電氣與信息工程學(xué)院 專業(yè)名稱： 控制科學(xué)與工程 論文提交日期： 2011年 4 月29日 論文答辯日期： 2011年 5 月 16 日 答辯委員會(huì)主席： 李欣然 教授 Research on power quality and interaction in high permeability photovoltaic gridconnected system byKANG Zhen. (Hunan University) 2008A thesis submitted in partial satisfaction of the Requirements for the degree ofMaster of EngineeringinControl Sicence and Engineeringin the Graduate Schoolof Hunan UniversitySupervisorProfessor LUO AnMay, 2011學(xué)位論文原創(chuàng)性聲明和學(xué)位論文版權(quán)使用授權(quán)書湖 南 大 學(xué)學(xué)位論文原創(chuàng)性聲明本人鄭重聲明：所呈交的論文是本人在導(dǎo)師的指導(dǎo)下獨(dú)立進(jìn)行研究所取得的研究成果。作者簽名： 日期： 年 月 日學(xué)位論文版權(quán)使用授權(quán)書本學(xué)位論文作者完全了解學(xué)校有關(guān)保留、使用學(xué)位論文的規(guī)定，同意學(xué)校保留并向國家有關(guān)部門或機(jī)構(gòu)送交論文的復(fù)印件和電子版，允許論文被查閱和借閱。（請(qǐng)?jiān)谝陨舷鄳?yīng)方框內(nèi)打“√”）作者簽名： 日期： 年 月 日導(dǎo)師簽名： 日期： 年 月 日 摘 要能源是人類賴以生存和發(fā)展的基礎(chǔ)。目前，光伏發(fā)電能量的傳遞和轉(zhuǎn)換都是建立在電力電子技術(shù)的基礎(chǔ)上，大規(guī)模的光伏電源并網(wǎng)使得大量的電力電子轉(zhuǎn)換器引入到電力系統(tǒng)中，從而大量的非線性負(fù)載也加入到了供電系統(tǒng)中，會(huì)對(duì)電力系統(tǒng)造成嚴(yán)重的污染，產(chǎn)生更為嚴(yán)重的電能質(zhì)量問題。以確保對(duì)高滲透率下光伏發(fā)電系統(tǒng)電壓水平、功率水平、諧波畸變率、三相不平衡度等電能質(zhì)量指標(biāo)進(jìn)行綜合控制。在不同光伏微源之間或光伏微源與電網(wǎng)之間實(shí)現(xiàn)并聯(lián)運(yùn)行控制和負(fù)載均分控制。關(guān)鍵詞：高滲透率；光伏發(fā)電；電能質(zhì)量；孤島效應(yīng)；微網(wǎng)環(huán)流；并網(wǎng)逆變器AbstractEnergy is the basis of human survival and development. Traditional nonrenewable energy such as coal and oil is diminishing and it will be depleted someday. Moreover, serious environmental pollution will be caused by using traditional energy. Therefore,looking for renewable clean energy is important for human sustainable development. Solar energy has the advantages of abundant resources, without geographical restrictions and nonpollution, attracts more and more attention recently. Presently, photovoltaic energy transfer and conversion are based on power electronics technology. So, abundant power electronics converters will be introduced into power system by extensive PV microsources connecting to the grid, which will bring pollution to power system and cause serious power quality problem. In addition, island effect and microgrid circulation, which caused by photovoltaic connecting grid cosmically, also seriously endanger the safety and stability of the power system. Consequently, research of power quality problem and study on control strategy of PV gridconnected system with high permeability is of great significance for safety operation of the electric power system.The effect of the power quality in distributed network caused by PV connecting to the grid with high permeability is firstly researched in this paper. An indicator system and a prehensive assessment method base on radar chart are proposed to insure integrated control of the high permeability system power quality such as voltage level, power level, harmonic distortion rate, three phase imbalance degree and so on. Then, the interaction between power quality control devices and photovoltaic generation equipment is researched. The study on control method and simulation analysis is done to the PV generation system configuring typical power quality devices SVC and DSTATCOM separately. Simulation result shows that power quality can be improved by the collaboration system consist of photovoltaic and power quality devices. The harmonics brought by the load and TCR can be suppressed by SVC and gird connected inverter with filter function, high quality power supply can be realized. Also,photovoltaic microsource can produce large capacity reactive power while provide power supply in the collaboration system with DSTATCOM, the cost of the power quality devices is reduced and the stability of the system is improved.The control method of suppressing microgrid circulation and the control strategy of multiinverters operation in parallel connection are also studied in the thesis. A solution to solve power coupling problem is proposed. Dummy V/f control strategy considering resistance and reactance based on rotating frame is adopted, and decoupling of active and reactive power is realized. Parallel operation control and loadsharing control among different microsources or between photovoltaic and the grid also can be realized.According to the condition and function demand of PV connecting to the grid, a 2kW single phase photovoltaic girdconnected inverter is developed by the project team independently. The detail software and hardware design of the controller, manmachine interface, development of inverter system are introduced in this paper. System modulation and experiment result indicate that the inverter can run steady and the control method can fulfill the demand of PV connecting to the gird.Key Words: High permeability。 Microgrid circulation。目前，世界范圍內(nèi)的能源利用主要以傳統(tǒng)的煤炭、石油等不可再生能源為主?；茉吹娜紵沟糜泻ξ镔|(zhì)排入大氣中，甚至使得局部地區(qū)形成酸雨，嚴(yán)重污染水土資源。太陽能是取之不盡，用之不竭的清潔能源，每40秒太陽傳送給地球的能量相當(dāng)于210億桶石油的能量，1018kWh，相當(dāng)于當(dāng)前全球能源消耗的數(shù)萬倍。目前以大機(jī)組，大電網(wǎng)，高電壓為特征的單一式供能系統(tǒng)占全世界供能系統(tǒng)的90%以上。分布式光伏發(fā)電可以充分開發(fā)利用各地的太陽能，將分布式光伏發(fā)電并入配電網(wǎng)是太陽能發(fā)電進(jìn)入電力市場的必由之路[1]。近年來，分布式光伏發(fā)電得到了全世界廣泛的關(guān)注[2]。我國土地廣闊，太陽能資源及其豐富，具有很好的開發(fā)潛力。不僅有助于提高供電品質(zhì)，還有助于提高電力系統(tǒng)的可靠性，防止大面積停電，增強(qiáng)電力系統(tǒng)抵御自然災(zāi)害的能力，對(duì)國家有重要的安全和經(jīng)濟(jì)意義[3]。高滲透率下光伏并網(wǎng)將產(chǎn)生特殊電能質(zhì)量問題。針對(duì)傳統(tǒng)電力系統(tǒng)電能質(zhì)量問題的檢測與評(píng)估，國內(nèi)外一直都十分關(guān)注，許多電力系統(tǒng)專家和學(xué)者已經(jīng)進(jìn)行了廣泛深入的研究，在降低電壓波動(dòng)和閃變、解決三相不平衡、抑制諧波方面，目前技術(shù)已相當(dāng)成熟[6]。這樣使得光伏發(fā)電系統(tǒng)復(fù)用自身的電力電子轉(zhuǎn)換器成為可能，利用自身的電力電子設(shè)備吸收或釋放有功、無功，不僅實(shí)現(xiàn)了電能轉(zhuǎn)換，還可以擔(dān)當(dāng)一定的電能質(zhì)量調(diào)節(jié)任務(wù)，通過相關(guān)的控制策略，可以盡快地投入使用，使得系統(tǒng)故障減少，減低了電能質(zhì)量治理裝置容量，減少了電力系統(tǒng)的額外投資[8]。光伏發(fā)電作為開發(fā)利用太陽能的主要途徑最受矚目。20世紀(jì)80年代初，美國就已經(jīng)開始了并網(wǎng)太陽能光伏發(fā)電的努力，制定了PVUSA，即太陽能光伏發(fā)電規(guī)模應(yīng)用計(jì)劃，主要是建立100kW以上的大型