本文關(guān)鍵詞： 光伏電池 MPPT QPR控制 LCL濾波器 有源阻尼控制　出處：《大連海事大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：由船舶運(yùn)輸而造成的環(huán)境污染越來越嚴(yán)重,在船舶電力系統(tǒng)中引入新能源是最有效地解決船舶污染的方法之一,所以本文對(duì)光伏發(fā)電并網(wǎng)系統(tǒng)在船舶電力系統(tǒng)中的應(yīng)用做了探索性的研究。重點(diǎn)研究了如何提高光伏并網(wǎng)逆變器的抗干擾能力,在船舶電網(wǎng)電壓幅值與頻率突變時(shí)仍能夠穩(wěn)定并網(wǎng)。為了能夠更準(zhǔn)確地模擬光伏發(fā)電并網(wǎng)系統(tǒng)在船舶電力系統(tǒng)中的運(yùn)行工況,首先建立了一個(gè)參數(shù)可調(diào)的光伏電池模型,并使用MPPT(Maximum Power Point Tracking)技術(shù)完成對(duì)光伏電池最大功率點(diǎn)的跟蹤。設(shè)計(jì)了一個(gè)功率為2kW的單相光伏并網(wǎng)系統(tǒng),利用電壓前饋補(bǔ)償?shù)姆椒▉淼窒娋W(wǎng)電壓對(duì)系統(tǒng)的擾動(dòng),使用QPR(Quasi Proportional Resonant)控制策略代替?zhèn)鹘y(tǒng)的PI控制方法,解決了PI控制無法精確地跟蹤正弦信號(hào)的缺點(diǎn)。為了擴(kuò)大光伏并網(wǎng)系統(tǒng)在船舶電力系統(tǒng)中的應(yīng)用范圍,設(shè)計(jì)了一個(gè)12kW的三相光伏并網(wǎng)系統(tǒng),利用QPR控制策略直接控制正弦電流信號(hào),解決了傳統(tǒng)PI控制需要經(jīng)行dq坐標(biāo)變換和解耦才能無誤差地控制并網(wǎng)電流的缺點(diǎn)。使用LCL濾波器代替單電感濾波器,解決了單L濾波器只能通過增加電感值來減小電流諧波的缺點(diǎn)。研究了LCL濾波器的參數(shù)設(shè)計(jì)并利用有源阻尼的方法解決了LCL濾波器的諧振問題。利用坐標(biāo)變換對(duì)光伏系統(tǒng)有用功率與無功功率進(jìn)行解耦,實(shí)現(xiàn)對(duì)光伏并網(wǎng)系統(tǒng)有功功率和無功功率的獨(dú)立控制。在Matlab仿真環(huán)境下搭建了一個(gè)基于本文研究策略的船舶光伏發(fā)電并網(wǎng)系統(tǒng)的完整仿真模型,并進(jìn)行了仿真實(shí)驗(yàn)。仿真結(jié)果證明了本文控制策略的有效性。
[Abstract]:The environmental pollution caused by ship transportation is becoming more and more serious. It is one of the most effective methods to solve the pollution of ships by introducing new energy into the ship power system. So this paper makes an exploratory research on the application of photovoltaic grid-connected system in marine power system, and focuses on how to improve the anti-interference ability of photovoltaic grid-connected inverter. In order to more accurately simulate the operation conditions of photovoltaic grid-connected system in ship power system, a photovoltaic cell model with adjustable parameters is established. A single-phase photovoltaic grid-connected system with a power of 2kW is designed, and the voltage feedforward compensation method is used to counteract the disturbance caused by the grid voltage, and the maximum power point of the photovoltaic cell is tracked by MPPT(Maximum Power Point tracking technology, and a single-phase photovoltaic grid-connected system with 2kW power is designed. The traditional Pi control method is replaced by QPR(Quasi Proportional Resonant control strategy, which solves the shortcoming that Pi control can not track sinusoidal signal accurately. In order to expand the application range of photovoltaic grid-connected system in ship power system, A 12 kW three-phase photovoltaic grid-connected system is designed. The sinusoidal current signal is directly controlled by QPR control strategy. The shortcoming of traditional Pi control is solved, which requires the transformation and decoupling of DQ coordinates in order to control the grid-connected current without error. The single inductor filter is replaced by LCL filter. The drawback that single L filter can only reduce current harmonic by increasing inductance is solved. The parameter design of LCL filter is studied and the resonance problem of LCL filter is solved by the method of active damping. The coordinate transform pair is used to solve the resonance problem of LCL filter. The useful power and reactive power of photovoltaic system are decoupled. To realize the independent control of active power and reactive power of photovoltaic grid-connected system, a complete simulation model of ship photovoltaic grid-connected system based on the strategy of this paper is built in Matlab simulation environment. The simulation results show the effectiveness of the proposed control strategy.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U665.1;TM615

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