多能互補新能源電站協(xié)調控制策略研究
胡津源1，王書征2
（1 江蘇徐塘發(fā)電有限責任公司，江蘇 徐州 221300；2 南京工程學院 電力工程學院，江蘇 南京 211167）
摘 要：基于對系統(tǒng)功率出力平滑控制的控制研究，結合光能、化學能和電能的優(yōu)點提出了一種多能互補新能源電站的協(xié)調控制策略，采用MPPT 控制光伏發(fā)電系統(tǒng)，通過控制雙向DC-DC逆變器實現(xiàn)蓄電池、超級電容器和氫燃料電池充放電，保證了直流母線電壓的穩(wěn)定。利用蓄電池和超級電容器能量互補特點，通過對電容兩端電壓的前饋閉環(huán)來削弱由負載電流變化引起系統(tǒng)閉環(huán)極點改變的影響，實現(xiàn)對儲能系統(tǒng)的優(yōu)化管理。建立多能互補協(xié)調控制系統(tǒng)的仿真模型，仿真結果表明，該系統(tǒng)可以解決因光伏功率和負載變化而導致電網(wǎng)電壓波動的問題，減少光伏電站因減少功率波動造成的主動削減不可恢復的功率，避免了一定的能量損失，增加了可再生能源運行柔性和經(jīng)濟上的效益最大化。
關鍵詞：多能互補；光伏發(fā)電；出力平滑
中圖分類號：TM714 文獻標識碼：A 文章編號：1007-3175(2020)09-0028-05
Research on Coordination Control Strategy of Multi-Energy Complementary New Energy Power Station
HU Jin-yuan1, WANG Shu-zheng2
（1 Jiangsu Xutang Power Generation Co., Ltd, Xuzhou 221300, China;
2 School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 2111 67, China）
Abstract: This paper proposes a coordinated control strategy for multi-energy complementary new energy power plants by studying the control of system power output smoothing control and combining the advantages of light energy, chemical energy and electric energy. This paper firstly uses MPPT to control the photovoltaic power generation system. By controlling the bidirectional DC-DC inverter, the battery, supercapacitor and hydrogen fuel cell are charged and discharged, and the DC bus voltage is stabilized. Then use the complementary characteristics of the energy of the battery and the supercapacitor, wherein the battery is used to store and output the low frequency power, the supercapacitor provides the high frequency deviation power through the current hysteresis control, and the load is weakened by the feedforward closed loop of the voltage across the capacitor. The current change causes the influence of the closed-loop pole change of the system to realize the optimal management of the energy storage system. Finally, the simulation model of multi-energy complementary coordinated control system is established. The simulation results show that the system can solve the problem of grid voltage fluctuation caused by photovoltaic power and load change, and reduce the active reduction of photovoltaic power station due to the reduction of power fluctuation. Power, avoiding certain energy losses, increases the flexibility of renewable energy operation and maximizes economic benefits.
Key words: multi-energy complementary; photovoltaic power generation; output smoothing
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