System and method for controlling online type photovoltaic power generation microgrid without storage device
A technology of photovoltaic power generation system and energy storage device, which is applied to AC networks of the same frequency with different sources, etc., can solve the problems of limited battery life, inseparable from energy storage devices, and high cost, improve conversion efficiency, and benefit a wide range of The effect of promotion and cost reduction
Inactive Publication Date: 2012-11-14
SHANGHAI JIAO TONG UNIV
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The invention discloses a system and a method for controlling an online type photovoltaic power generation microgrid without a storage device. The system comprises a photovoltaic component, a power controller, a grid-connected inverter system, a current detection device and a reverse-power protector, the photovoltaic component is connected with the grid-connected inverter system through the power controller, output of the grid-connected inverter system and grid current are connected to simultaneously supply power to load, the power controller enables a photovoltaic power generation system to be in a variable power output state and dynamically adjusts output power of the photovoltaic power generation system according to changes of the load, the current detection device detects magnitude and phase position of the grid current as current feedback control signals of the grid-connected inverter system, and the reverse-power protector is positioned between the microgrid and an outer grid to stop the microgrid from transmitting current to the outer grid. The system is free of a storage battery energy storage system, the outer grid is only a supplement when the microgrid is in power shortage, and power transmission to the outer grid is effectively avoided, so that effects of electricity saving can be realized without upgrading power transmission networks and power distribution networks, and popularization is facilitated.
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