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Light storage and charging control system and method

A technology of control system and control method, which is applied in the field of power electronics, can solve the problems of complicated and cumbersome grid connection, waste of manpower and material resources, etc., and achieve the effect of avoiding short circuit of power supply and waste of manpower and material resources

Pending Publication Date: 2022-08-09
绿能慧充数字技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a solar storage charging control system and method to solve the technical problems of complex and cumbersome grid-connected control of existing solar storage systems, resulting in waste of manpower and material resources

Method used

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  • Light storage and charging control system and method
  • Light storage and charging control system and method

Examples

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Effect test

Embodiment 1

[0044] like Figure 1-2 As shown, an optical storage and charging control system includes a grid connection point E and a main control module, and the grid connection point E is connected to the node D through the first air circuit breaker QF1;

[0045] The node D is connected to the charging module 3, and the node D is connected to the node B through the third AC contactor KM3;

[0046] Node B is connected to the energy storage converter 2;

[0047] The energy storage converter 2 is connected to node A;

[0048] Node A is connected to the DC-DC module 6 through the first DC contactor KZ1, and the DC-DC module 6 is connected to the photovoltaic string 7;

[0049] Node A is connected to the energy storage battery 5 through the second DC contactor KZ2;

[0050] The grid connection point E is connected to the node C through the second air circuit breaker QF2 and the first AC contactor KM1 connected in series in sequence;

[0051] Node C is connected to Node B through the seco...

Embodiment 2

[0072] A method for controlling light storage and charging, comprising the following steps:

[0073] The forward active power data obtained from the grid is detected by the two-wire meter and sent to the main control module;

[0074] When there is electricity in the grid, the energy storage battery 5 and the photovoltaic string 7 are connected to the grid or absorbed by the energy storage converter 2, and the main control module controls the inverter output power of the energy storage converter 2 according to the forward active power data. ;

[0075] When the power grid is powered off, the energy storage battery 5 and the photovoltaic string 7 supply power to the load 4 through the off-grid inverter 2 through the energy storage converter 2;

[0076] When the power grid is switched from power on to power off, the first AC contactor KM1 and the third AC contactor KM3 are disconnected first, and the second AC contactor KM2 is pulled in after 2S, and the energy storage converter ...

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Abstract

The invention belongs to the technical field of power electronics, and particularly relates to an optical storage and charging control system and method. Comprising a grid-connected point E and a main control module, and the grid-connected point E is connected with a node D through a first air circuit breaker QF1; the node D is connected with the node B through a third alternating current contactor KM3; the node B is connected with the energy storage converter; the energy storage converter is connected with the photovoltaic energy storage module; the grid-connected point E is connected with the node C through a second air circuit breaker QF2 and a first alternating current contactor KM1 which are sequentially connected in series; the node C is connected with the node B through a second alternating current contactor KM2; the node C is connected with a load through a third air circuit breaker QF3; the first alternating current contactor KM1 and the second alternating current contactor KM2 are interlocked, and the second alternating current contactor KM2 and the third alternating current contactor KM3 are interlocked; and the main control module is used for acquiring the forward active power data of the grid-connected point E and controlling the output power of the energy storage converter according to the forward active power data. Through the interlocking relation between the alternating current contactors, power supply short circuit caused by sudden power supply of a power grid is avoided.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to an optical storage and charging control system and method. Background technique [0002] In recent years, photovoltaic + energy storage products have developed rapidly. The current tiered electricity price and power rationing policy, as well as the policy of installing a certain proportion of energy storage for photovoltaic installations, have promoted the installation of photovoltaics and energy storage in some large and medium-sized industrial parks. It can bring diversified benefits to the owners, such as the green benefits of photovoltaic power generation for self-use, energy storage utilization of peak and valley voltage arbitrage. At the same time, the solar energy storage system can also be used as a backup power supply. In the event of a power outage, the photovoltaic power generation and energy storage are used to supply power to the electrical equ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/48H02J3/32
CPCH02J3/381H02J3/48H02J3/322H02J2300/24Y02T90/12
Inventor 李恩虎崔鑫张云亮
Owner 绿能慧充数字技术有限公司
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