考慮儲(chǔ)能荷電狀態(tài)的附加功率調(diào)節(jié)的混合微電網(wǎng)協(xié)調(diào)控制
張潮，劉海濤，許倫，李昕儒
（南京工程學(xué)院 電力工程學(xué)院，江蘇 南京 211167）
摘 要：提出一種附加功率調(diào)節(jié)的混合微電網(wǎng)協(xié)調(diào)控制策略，對(duì)光伏和儲(chǔ)能組成的交直流混合微電網(wǎng)的功率分配問(wèn)題進(jìn)行研究?？紤]直流負(fù)荷大小和荷電狀態(tài)（SOC）變換，給出一種加入兩個(gè)比較器的電壓外環(huán)電流內(nèi)環(huán)雙環(huán)控制，實(shí)現(xiàn)儲(chǔ)能在不同負(fù)荷情況下充放電，防止儲(chǔ)能過(guò)度充放電。針對(duì)儲(chǔ)能處于停機(jī)模式時(shí)系統(tǒng)功率不平衡問(wèn)題，基于上層控制設(shè)計(jì)分布式電源的多模式切換算法，求得附加功率實(shí)時(shí)調(diào)整交直流微電網(wǎng)連接的雙向DC/AC變換器的輸出功率。搭建光伏- 儲(chǔ)能交直流混合微電網(wǎng)仿真模型，各分布式電源能夠根據(jù)不同的運(yùn)行模式快速分配功率，協(xié)調(diào)維持系統(tǒng)的穩(wěn)定運(yùn)行，驗(yàn)證了所提控制策略的有效性。
關(guān)鍵詞：交直流混合微電網(wǎng)；荷電狀態(tài)；上層控制；附加功率調(diào)節(jié)
中圖分類號(hào)：TM734 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1007-3175(2019)12-0010-06
Coordinated Control of Hybrid Micro-Grid Considering Additional Power Regulation of Energy Storage SOC
ZHANG Chao, LIU Hai-tao, XU Lun, LI Xin-ru
（School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 21116 7, China）
Abstract: This paper proposed an additional power regulation hybrid micro-grid coordinated control strategy to research on the AC/DC hybrid micro-grid power distribution problems composed by PV-energy storage. Considering the DC load and SOC transformation, this paper gave a kind of double-loop control of voltage outer loop and current inner loop with two comparators to realize the charge and discharge control of energy storage under different loads, so as to prevent the energy storage from excessive charge and discharge. In allusion to the unbalanced power system problem when the energy storage was in shutdown mode, the multi-mode switching algorithm of distributed generation was designed based on the upper control, and the additional power was obtained to adjust the output power of the bidirectional DC/AC converter connected with the AC/DC micro-grid in real time. The simulation model of PV-energy storage AC/DC hybrid micro-grid was built and the distributed generation can rapidly distribute power according to different operation modes, coordinate and maintain the stable operation of the system, which verifies the effectiveness of the proposed control strategy.
Key words: AC/DC hybrid micro-grid; state of charge; upper control; additional power regulation
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