獨立光伏混儲系統(tǒng)穩(wěn)定運行控制研究
李凡
（中國能源建設(shè)集團湖南省電力設(shè)計院有限公司，湖南 長沙 410007）
摘 要：受環(huán)境影響的光伏電源輸出的最大功率總是波動的，無法實現(xiàn)穩(wěn)定運行、可靠供電。針對該問題，建立了獨立光伏混儲系統(tǒng)的結(jié)構(gòu)，介紹了光伏最大功率輸出控制，提出了混儲系統(tǒng)的波動功率分配控制策略，以超級電容器的荷電狀態(tài)區(qū)域為基礎(chǔ)，對混儲系統(tǒng)充放電運行狀態(tài)進行可靠切換控制，充分發(fā)揮蓄電池和超級電容器的各自特性的優(yōu)點。仿真結(jié)果表明，獨立光伏混儲系統(tǒng)在設(shè)計的策略控制下可以穩(wěn)定運行，平衡供電功率，滿足負荷對電能質(zhì)量的需求。
關(guān)鍵詞：獨立光伏；混合儲能；穩(wěn)定運行；狀態(tài)切換
中圖分類號：TM615 文獻標識碼：A 文章編號：1007-3175(2020)03-0020-03
Stable Operation Control of Independent Photovoltaic System Based on Hybrid Energy Storage
LI Fan
（China Energy Engineering Group Hunan Electric Power Design Institute Co., Ltd, Changsha 410007, China）
Abstract: The maximum power of photovoltaic power output affected by the environment is always fluctuating, so that it can’t realize the stable operation and reliable power supply.To solve this problem, this paper established a structure of independent photovoltaic system based on hybrid energy storage, introduced the maximum photovoltaic power output control and proposed the fluctuating power distribution control strategy of hybrid energy storage.Based on the state of charge of supercapacitor, the charge and discharge operation states of hybrid energy storage were reliably switching controlled, to give full play to the advantages of respective characteristics of batteries and super capacitors. Simulation results show that under the designed control of independent photovoltaic system based on hybrid energy storage can stably operate, balance supply power and meet the loads demand for power quality.
Key words: independent photovoltaic; hybrid energy storage; stable operation; state switching
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