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PSO Based PI Controller Design for a Solar Charger System

機(jī)譯:基于PSO的太陽(yáng)能充電器系統(tǒng)PI控制器設(shè)計(jì)

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摘要

Due to global energy crisis and severe environmental pollution, the photovoltaic (PV) system has become one of the most important renewable energy sources. Many previous studies on solar charger integrated system only focus on load charge control or switching Maximum Power Point Tracking (MPPT) and charge control modes. This study used two-stage system, which allows the overall portable solar energy charging system to implement MPPT and optimal charge control of Li-ion battery simultaneously. First, this study designs a DC/DC boost converter of solar power generation, which uses variable step size incremental conductance method (VSINC) to enable the solar cell to track the maximum power point at any time. The voltage was exported from the DC/DC boost converter to the DC/DC buck converter, so that the voltage dropped to proper voltage for charging the battery. The charging system uses constant current/constant voltage (CC/CV) method to charge the lithium battery. In order to obtain the optimum PI charge controller parameters, this study used intelligent algorithm to determine the optimum parameters. According to the simulation and experimental results, the control parameters resulted from PSO have better performance than genetic algorithms (GAs).
機(jī)譯:由于全球能源危機(jī)和嚴(yán)重的環(huán)境污染,光伏(PV)系統(tǒng)已成為最重要的可再生能源之一。以前有關(guān)太陽(yáng)能充電器集成系統(tǒng)的許多研究都只關(guān)注負(fù)載充電控制或切換最大功率點(diǎn)跟蹤(MPPT)和充電控制模式。本研究使用兩階段系統(tǒng),該系統(tǒng)允許整個(gè)便攜式太陽(yáng)能充電系統(tǒng)同時(shí)實(shí)現(xiàn)MPPT和鋰離子電池的最佳充電控制。首先,本研究設(shè)計(jì)了一種太陽(yáng)能發(fā)電的DC / DC升壓轉(zhuǎn)換器,該轉(zhuǎn)換器使用可變步長(zhǎng)增量電導(dǎo)方法(VSINC)使太陽(yáng)能電池能夠隨時(shí)跟蹤最大功率點(diǎn)。電壓從DC / DC升壓轉(zhuǎn)換器輸出到DC / DC降壓轉(zhuǎn)換器,因此電壓下降到適當(dāng)?shù)碾妷阂越o電池充電。充電系統(tǒng)使用恒流/恒壓(CC / CV)方法為鋰電池充電。為了獲得最佳的PI電荷控制器參數(shù),本研究采用智能算法確定最佳參數(shù)。根據(jù)仿真和實(shí)驗(yàn)結(jié)果,由粒子群優(yōu)化算法得到的控制參數(shù)比遺傳算法具有更好的性能。

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