Supercapacitor and storage battery mixed energy-storing energy management circuit in photovoltaic grid-connected power generation

A supercapacitor, grid-connected power generation technology, applied in photovoltaic power generation, electric energy storage systems, electrical components, etc., can solve the problems of short life, high system maintenance cost, fast aging speed of batteries, etc., and achieve long life and large storage capacity. , the effect of reducing the number of charge and discharge

Active Publication Date: 2013-01-16
EAST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, because battery energy storage is achieved through chemical reactions, its aging speed is directly related to charge and discharge sensitivity, and its service life is directly related to the number of charge and discharge times. In photovoltaic grid-connected power generation systems, the output power of photovoltaic arrays will vary with the intensity of Due to frequent changes in natural conditions such as ambient temperature, the battery will be charged and discharged frequently, resulting in the disadvantages of fast aging, short life and high system maintenance costs in the battery in the photovoltaic grid-connected power generation system.

Method used

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  • Supercapacitor and storage battery mixed energy-storing energy management circuit in photovoltaic grid-connected power generation
  • Supercapacitor and storage battery mixed energy-storing energy management circuit in photovoltaic grid-connected power generation
  • Supercapacitor and storage battery mixed energy-storing energy management circuit in photovoltaic grid-connected power generation

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Embodiment Construction

[0021] A hybrid energy storage energy management circuit of a photovoltaic grid-connected supercapacitor and battery in this embodiment is as follows: figure 1 As shown, it includes a photovoltaic array, a battery and a grid-connected inverter. The photovoltaic array is connected to the grid-connected inverter through a DC bus. The battery is connected between the positive and negative poles of the DC bus. A first A detection control circuit; a supercapacitor is connected between the positive and negative poles of the DC bus through the second detection control circuit;

[0022] The first detection control circuit is used when the DC bus voltage is detected relative to expectations The fluctuation is greater than the preset value When , enable the battery to charge and discharge to maintain the voltage of the DC bus at the desired value ; The first detection control circuit is used when the DC bus voltage is detected relative to expectations The fluctuation is less ...

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Abstract

The invention discloses a supercapacitor and storage battery mixed energy-storing energy management circuit in photovoltaic grid-connected power generation and relates to the technical field of control and application of new energy. The supercapacitor and storage battery mixed energy-storing energy management circuit is characterized in that a first detection and control circuit is connected between a storage battery and a direct-current bus, and a supercapacitor is connected between an anode and a cathode of the direct-current bus through a second detection and control circuit. Effective energy management for the storage battery and the supercapacitor is achieved by simultaneously using the storage battery and the supercapacitor as energy storing devices of a photovoltaic grid-connected power generation system and taking advantages of high storing capacity and low cost of the storage battery and high power density and long service life of the supercapacitor, and accordingly charge-discharge times of the storage battery are greatly decreased, and the service life of the storage battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of new energy control and application, in particular to a supercapacitor and battery hybrid energy storage energy management circuit for photovoltaic grid-connected power generation. Background technique [0002] In the photovoltaic grid-connected power generation system, the photovoltaic array cannot continuously and stably output electric energy due to changes in natural conditions such as sunlight intensity and ambient temperature, resulting in stability problems in the photovoltaic power generation system, making it difficult to track load changes well. Therefore, it is of great significance to configure an energy storage device with a certain capacity in the system for photovoltaic grid-connected power generation systems. The energy storage device can stabilize the output power of the photovoltaic power generation system, so that when the power generation or load power fluctuates greatly It can still ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J15/00
CPCY02E70/30Y02E10/566Y02E10/56
Inventor 徐海波徐顺刚
Owner EAST GRP CO LTD
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