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Accumulator control method for photovoltaic parallel in system

A battery and battery voltage technology, which is applied in photovoltaic power generation, battery circuit devices, current collectors, etc., can solve the problems of low response speed, low adjustment accuracy, slow adjustment speed, and subsequent load interference, and achieve high adjustment accuracy and utilization. Adjust the effect quickly

Inactive Publication Date: 2007-06-27
南京冠亚电源设备有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

"One point method" has fast response speed and low adjustment accuracy; "stage method" has higher adjustment accuracy, but the adjustment speed is slower; PWM method will cause serious interference to the subsequent load

Method used

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  • Accumulator control method for photovoltaic parallel in system
  • Accumulator control method for photovoltaic parallel in system
  • Accumulator control method for photovoltaic parallel in system

Examples

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Embodiment Construction

[0020] As shown in Figure 1, the photovoltaic grid-connected system adopting the battery GY control method of this embodiment includes the first solar energy 1, the second solar energy 2, and so on to the nth solar energy n, wherein the first solar energy 1 The output of the first photovoltaic array X1 is connected to the first charging circuit Y1, the output of the first charging circuit Y1 is connected to the first storage battery Z1, and the output of the first storage battery is connected to the load; the structure of the second solar energy to the nth solar energy is analogized in turn; It also includes the sampling circuit C2 connected to the load, the output of the sampling circuit connected to the CPU processing unit C1, and the CPU processing unit controls the first charging circuit Y1 to the nth charging circuit Yn. The control flow chart of the CPU processing unit C1 controlling the storage battery GY according to the sampling result of the sampling circuit C2 is sho...

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PUM

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Abstract

This invention relates to a control method for storage cells used in photovoltaic merging system including solar systems from the first path to n path, in which, each path system includes a photovoltaic array, the output of which is connected with a charge circuit, the output of which is connected with a storage cell, a sample circuit is set to be connected to a load, the CPU process unit controls the charge circuits from 1 to n, a voltage current double closed loop is applied to carry out parallel control with PRI, when the voltage or current of the cell reaches to the threshold, solar energy input of certain paths is cut off / closed one by one, and when the voltage or current of the cell reaches to the maxium or minimum threshold, all of them are cut off / closed.

Description

1. Technical field [0001] The invention relates to a storage battery control method, in particular to a storage battery control method used in a photovoltaic grid-connected system and a corresponding hardware circuit for realizing the method. Especially the battery GY control method in the photovoltaic grid-connected system. 2. Background technology [0002] In the photovoltaic grid-connected system, the output of the photovoltaic array charges the battery to obtain a constant DC voltage, and then a stable AC output voltage is obtained through the power converter to be connected to the grid. The battery voltage and current must be controlled to store energy, obtain the constant DC voltage input required by the power converter, and prevent overvoltage and overcurrent phenomena to maintain the safety of photovoltaic grid-connected systems and user load equipment. The environment and natural conditions of the photovoltaic grid-connected system have great uncertainty and variab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/35H02J3/38
CPCY02E10/566Y02E10/563Y02E10/56
Inventor 张海波崔海瑞孙邦伍
Owner 南京冠亚电源设备有限公司
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