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Multi-quadrant photovoltaic energy storage and inversion integrated device

A photovoltaic energy storage and quadrant technology, applied in photovoltaic power generation, circuit devices, battery circuit devices, etc., can solve problems such as the maximum operating point work efficiency of photovoltaic modules, and achieve flexible scheduling of power generation time and capacity, simple topology structure, The effect of maximizing work efficiency

Inactive Publication Date: 2012-06-20
CHINA EPRI SCIENCE & TECHNOLOGY CO LTD +2
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Problems solved by technology

[0011] The DC side connection method improves the flexibility of the energy storage system because the photovoltaic modules are connected through the controller and the battery, but affects the working efficiency of the maximum operating point of the photovoltaic modules

Method used

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  • Multi-quadrant photovoltaic energy storage and inversion integrated device
  • Multi-quadrant photovoltaic energy storage and inversion integrated device
  • Multi-quadrant photovoltaic energy storage and inversion integrated device

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Embodiment Construction

[0041] The working principle and process of the photovoltaic energy storage and inverter integrated system of the device according to the present invention will be described in detail below in conjunction with the embodiments:

[0042] Mode 1: Only photovoltaic energy is connected to the grid

[0043] When the output energy of the photovoltaic array meets the grid-connected energy for scheduling, the boost circuit composed of inductor L1, Q1, and Q2 completes the MPPT function, and boosts the full-time energy generated by PV photovoltaics to the bus voltage, and the bus supports energy through the AC H bridge to Grid powered. Realize the control of active power and reactive power by adjusting the phase angle between the grid-connected current of the AC H-bridge and the grid voltage and the parameters of the control link, and adjust the active and reactive power in real time according to the dispatching instructions. energy flow as Figure 5 shown by the red line.

[0044] M...

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Abstract

The invention belongs to a multi-quadrant photovoltaic energy storage and inversion integrated device. The integrated device comprises a photovoltaic cell power conversion device, an energy storage cell bidirectional energy conversion device, a DC bus energy bidirectional conversion device and the like. Owing to the integrated energy dispatching software based on bus voltage variation, the multi-quadrant photovoltaic, energy storage and inversion integrated multi-power flowing function is realized.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic grid-connected control, and relates to a multi-quadrant photovoltaic energy storage and inverter integrated device. Background technique [0002] The inherent randomness and intermittent nature of solar energy and other resources determine that the large-scale development of new energy will inevitably have a significant impact on the safe and stable operation of the power grid, and must be supported by advanced energy storage and inverter integration technologies. The integrated energy storage and inverter technology solves the randomness and volatility problems of new energy power generation to a large extent, can realize the smooth output of new energy power generation, and can effectively adjust the changes in grid voltage, frequency and phase caused by new energy power generation , so that solar power can be easily and reliably integrated into the conventional power grid. [0003] Most o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/32H02J7/02
CPCY02E70/30Y02E10/566Y02E10/563Y02E10/56
Inventor 盛飞
Owner CHINA EPRI SCIENCE & TECHNOLOGY CO LTD
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