Research of Grid-Connected Peak Shaving Control for Micro Photovoltaic Energy Storage System

doi:10.11985/2017.03.006

Abstract

Abstract:

Aiming at the new energy power generation of distributed photovoltaic (PV) grid system, this paper mainly studied the core of the inverter part in grid connected power generation system. Design a new kind of two-stage grid connected inverter with energy storage device. In addition, aiming at the problem of electricity peak valley when the distribution network load demand change, studies a peak shaving control strategy for the distributed grid-connected PV system with energy storage devices. Present a peak load shaving control strategy based on Point of common coupling voltage compensation. Finally, the parameter design of the whole system is finished, and through software simulation and hardware experiment, the rationality of the two-stage grid connected inverter design is verified. Improve the operation efficiency of PV system, effectively solve the problem of peak load shaving and system stability. Provides technical reference for the design of the distributed photovoltaic grid power system.

Key words: Distributed photovoltaic, flyback inverter, soft switch, battery energy storage system, peak load shaving

CLC Number:

TM464

Zhengguo Piao,Ming Zhang. Research of Grid-Connected Peak Shaving Control for Micro Photovoltaic Energy Storage System[J]. Journal of Electrical Engineering, 2017, 12(3): 41-47.

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	参数类别	取值范围	额定值
Boost电路	光伏电池板电压V_PV/V	20~50	36
	最大功率点电压V_MPP/V	25~45	36
	Boost电压V_Boost/V	46~60	48
反激逆变电路	逆变输出电压V_out/V	210~242	220
	并网输出频率f_out/Hz	49.3~50.7	50
	额定输出功率P_out/W	–	200
	谐波含量THD(%)	4.5<	–
	逆变效率η(%)	–	93
蓄电池	蓄电池电压V_bat/V	–	48
蓄电池	蓄电池容量C/A·h	–	20