光伏MPPT自適應(yīng)策略研究及評(píng)估
盧曉光1,李鳳格2,劉偉鵬3,盧利軍1
(1 河南許繼儀表有限公司,河南 許昌 461000;
2 許昌智能繼電器股份有限公司,河南 許昌 461000;
3 河南許繼電力電子有限公司,河南 許昌 461000)
摘 要:光伏電池最大功率點(diǎn)追蹤(MPPT)算法種類繁多,但現(xiàn)有產(chǎn)品追蹤能力弱,控制過程追蹤速度和穩(wěn)態(tài)精度不能兼顧。搭建了光伏電池模型并進(jìn)行仿真,尋找光伏電池對(duì)環(huán)境變化的響應(yīng)特性,并通過響應(yīng)特性尋找光伏電池達(dá)到 MPPT 狀態(tài)的電壓給定條件及給定趨勢,進(jìn)而掌握 MPPT 控制機(jī)理。選擇擾動(dòng)法 MPPT 技術(shù)搭建整體光伏系統(tǒng)仿真模型,總結(jié)了擾動(dòng)法對(duì)響應(yīng)速度及穩(wěn)態(tài)波動(dòng)上的控制矛盾。設(shè)計(jì)了自適應(yīng)擾動(dòng)法 MPPT 控制策略并完成仿真模型搭建及仿真評(píng)估,結(jié)果表明,自適應(yīng)擾動(dòng)法 MPPT 控制能提高響應(yīng)速度50%,穩(wěn)態(tài)波動(dòng)減少77.5%,且實(shí)現(xiàn)簡單不需要附加測量設(shè)備及提高控制器性能。
關(guān)鍵詞: 光伏發(fā)電;光伏電池;自適應(yīng)擾動(dòng)法;最大功率點(diǎn)追蹤;響應(yīng)特性;穩(wěn)態(tài)波動(dòng)
中圖分類號(hào):TM615 ;TM914.4 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2024)12-0048-06
Research and Evaluation of Adaptive Strategies for Photovoltaic MPPT
LU Xiao-guang1, LI Feng-ge2, LIU Wei-peng3, LU Li-jun1
(1 Henan XJ Metering Co., Ltd, Xuchang 461000, China;
2 Xu Chang Intelligent Relay Co., Ltd, Xuchang 461000, China;
3 Henan XJ Power Electronics Co., Ltd, Xuchang 461000, China)
Abstract: There are numerous maximum power point tracking(MPPT) algorithms for photovoltaic (PV) cells, but existing products exhibit weak tracking capabilities, failing to balance tracking speed and steady-state accuracy during the control process.Based on this, a PV cell model is built and simulated to find the response characteristics of PV cells to environmental changes, and through the response characteristics to find the voltage given conditions and trends of PV cells to reach the MPPT state, so as to grasp the MPPT control mechanism. Selecting the perturbation method MPPT technology to build the overall PV system simulation model, and summarize the perturbation method on the response speed and steady state fluctuations on the control contradictions. The adaptive perturbation method MPPT control strategy is designed and the simulation model construction and simulation evaluation are completed, and the results show that the adaptive perturbation method MPPT control can improve the response speed by 50%, the steady state fluctuation is reduced by 77.5%, and the realization is simple without the need for additional measurement equipment and improve the performance of the controller.
Key words: photovoltaic power generation; photovoltaic cell; adaptive perturbation method; maximum power point tracking; response characteristic; steady state fluctuation
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