Research on control strategy for DCcoupled energy storage converters based on threeport virtual MPPT

Abstract

Abstract:

DCcoupled energy storage converters based on threeport virtual Maximum Power Point Tracking (MPPT) are the energy matching and adjusting devices between PV module arrays and PV inverters. By analyzing the topology and stability of the frontend and backend converters ,decoupling of the frontend and backend control was realized. Leadlag compensation for the instability of backend BOOST ensured proper phase margin and amplitude margin. The virtual MPPT output control strategy of the DCcoupled energy storage converter is considered to be a perfect match for the PV inverter in stock market since it can smooth the PV power output,shave peak load, and greatly increase the selfusage ratio.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">DC font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">coupled energy storage converter, virtual MPPT, leadfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">lag compensation, PV inverter, decoupling

ZHAN Guomin，XIAO Yao，ZHANG Hong，ZHAO Xingguo.

Research on control strategy for DCcoupled energy storage converters based on threeport virtual MPPT [J]. Huadian Technology, 2019, 41(10): 24-29.

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Research on control strategy for DCcoupled energy storage converters based on threeport virtual MPPT

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