Wind power and photovoltaic microgrid water pumping and energy storing power generation system

Abstract

The invention discloses a wind power and photovoltaic microgrid water pumping and energy storing power generation system. The system comprises a microgrid direct-current bus, an alternating-current bus, a system controller, a photovoltaic power generation subsystem, a DC-DC controller, a capacitor switch set, a super-capacitor set, an energy-storing battery set, a two-way DC-DC controller, a wind power generation subsystem, an AC-DC controller, a DC-AC controller, a water pump switch set, a water pump unit, a selector switch set, a reversible water turbine set, a thrown-in switch set, a power generator set, a water turbine set, a booster station and a large power grid. The wind power generation subsystem and the photovoltaic power generation subsystem can be subjected to running control at maximum power, maximum energy acquisition is guaranteed, system power balance and electric energy quality are not considered, the thrown-in set number of the super-capacitor set is controlled, smoothing is performed on the voltage of the microgrid direct-current bus, and the bus voltage is kept stable. The electric energy quality problem caused by wind power and photovoltaics can be neglected, the power generation utilizing rate of renewable energy is increased, and reliable, controllable and stable electric energy is provided for the large power grid.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of new energy wind power generation and photovoltaic power generation microgrid, relates to the efficient and stable application of wind power and photovoltaic power generation, and specifically relates to a wind power photovoltaic microgrid pumped storage power generation system. Background technique [0002] With the continuous expansion of the capacity of wind turbines, the intermittent nature of wind power has caused most wind turbines to fail to be connected to the grid. The utilization efficiency of wind turbines is not high, and the photovoltaic power generation capacity is also increasing. Due to the characteristics of wind and wind power generation, its electric energy cannot be well connected to the large power grid. Many domestic units and individuals are studying how to efficiently and stably utilize wind and solar new energy. Teachers from Anhui Engineering Universi...

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Problems solved by technology

[0004] In view of the intermittent characteristics of wind power and the low efficiency of photovoltaic power generation caused by natural factors, the purpose of the present invention is to provide a wind power photovoltaic micro-grid pumped storage power generation system, which can ignore the power brought by wind power and photovoltaic power generation. Quality issues, maximize the efficiency of the use of renewable energy, improve power generation utilization and controllable output power and provide reliable, controllable and stable power to the large power grid

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