Battery energy storage system for alleviating problem of photovoltaic power generation abandoning and limiting and control method therefor

A battery energy storage system and photovoltaic power station technology, applied in photovoltaic power generation, flexible AC transmission system, greenhouse gas reduction, etc., can solve the problems affecting the economics of photovoltaic power generation and high cost of substations, so as to facilitate operation and maintenance and equipment update, Reduction of construction costs and uniformity of life

Active Publication Date: 2017-02-01
湖南德沃普电气股份有限公司
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AI Technical Summary

Problems solved by technology

The cost of the step-up substation in the solar-storage power station is relatively high, which seriously affects the economics of photovoltaic power generation. It is necessary to design a new solar-storage grid-connected mode

Method used

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  • Battery energy storage system for alleviating problem of photovoltaic power generation abandoning and limiting and control method therefor
  • Battery energy storage system for alleviating problem of photovoltaic power generation abandoning and limiting and control method therefor
  • Battery energy storage system for alleviating problem of photovoltaic power generation abandoning and limiting and control method therefor

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Embodiment

[0029] combine Figure 1-4 , illustrate the implementation process of the present invention.

[0030] A battery energy storage system for reducing curtailment of photovoltaic power plants, including: N solar storage grid-connected units connected to the grid, a solar curtailment control module, and a charging and discharging power distribution module of the battery energy storage system. The box-type step-up transformer corresponding to the grid unit, the on-site communication management machine, and the remote terminal control module; each photovoltaic storage grid-connected unit includes: a photovoltaic power generation unit and a battery energy storage unit, and each photovoltaic power generation unit passes through the DC / The AC inverter and DC / DC converter are connected to the PCC grid-connected point on the low-voltage side of the three-phase grid, and the corresponding battery energy storage unit is connected to the PCC grid-connected point on the low-voltage side of t...

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Abstract

The invention relates to a battery energy storage system for alleviating a problem of photovoltaic power generation abandoning and limiting and a control method therefor. The battery energy storage system comprises N photovoltaic power storage grid connected units connected with a power grid, a photovoltaic power generation abandoning control module, a charge and discharge power distribution module for the battery energy storage system, box type voltage step-up transformers corresponding to all the photovoltaic power storage grid connected units; each photovoltaic power storage grid connected unit comprises a photovoltaic power generation unit and a battery energy storage unit; each photovoltaic power generation unit is connected to a PCC grid connected point on a low voltage side of a three phase power grid, and a corresponding battery energy storage unit is connected to the PCC grid connected point on the low voltage side of the three phase power grid. Compared with technologies of the prior art, the battery energy storage system and the control method therefor are advantageous in that construction cost of a voltage step-up transformer substation in a photovoltaic power storage station is lowered, and economical efficiency of photovoltaic power generation is improved.

Description

Technical field: [0001] The present invention relates to a power supply system of a photovoltaic power station, in particular to a battery energy storage system and a control method for reducing the curtailment of light and electricity in a photovoltaic power station. Background technique: [0002] At present, photovoltaic power generation has been widely recognized as a renewable energy source. At the same time, the rapid development of photovoltaic power generation has brought challenges to the operation of the grid. At present, the construction of supporting facilities, the strengthening of the grid structure, the construction of peak-shaving power stations, and the bundling of hydropower have been strengthened. The ability of the grid to accept photovoltaic power generation. The above means are subject to various constraints to a certain extent, and the power grid needs flexible and efficient means to realize the transmission and consumption of photovoltaic power generat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/32H02J3/383Y02E10/56Y02E40/10Y02E70/30
Inventor 魏达刘平平刘杰
Owner 湖南德沃普电气股份有限公司
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