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Control unit for zero counter current network integrating control device

A technology of control unit and control device, applied in the direction of single-grid parallel feeding arrangement, climate change adaptation, etc., can solve problems such as preventing reverse power

Inactive Publication Date: 2012-04-18
西东控制集团(沈阳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can also be seen from this that when the grid-connected inverter implements reverse power protection, the reverse current of 0.5s-2s has actually occurred, which does not completely prevent the occurrence of reverse power

Method used

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  • Control unit for zero counter current network integrating control device
  • Control unit for zero counter current network integrating control device
  • Control unit for zero counter current network integrating control device

Examples

Experimental program
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Embodiment Construction

[0023] A control unit of a zero-backflow common-network control device, which is used in a zero-backflow control device applied to a municipal power grid. The core part of the control unit is a data acquisition and calculation that can perform more than 100 calculations per second Microcontroller chip, preferably (8051F020), can be connected to n-channel renewable energy DC power, and converted into 220V single-phase or 380V three-phase AC power with slightly higher voltage than the mains voltage, frequency and phase consistency with the mains through grid-connected inverter The power grid supplies power to the user grid. The control unit uses a preset optimization algorithm to perform comparison calculations, calculate the change trend (slope) of the difference between power generation and power consumption, obtain the predicted time when reverse power will occur, and issue a corresponding Control instruction;

[0024] When the predicted time obtained is less than the samplin...

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Abstract

The invention provides a control unit for a zero counter current network integrating control device, which is used in a zero counter current control device connected to the municipal power grid to realize the zero counter current of the device and prevent the back power from happening. The control unit is a control unit for the zero counter current control device, which can integrate renewable energy power, generated by solar photovoltaic power generation, wind electric power generation and the like, and the municipal power supply in a power grid. The control unit has the advantages of integrating the renewable energy power and the municipal power in a power grid, realizing the use of municipal power as backup power, making the renewable energy power used immediately as the renewable energy power is generated, making the device have the function of zero counter current control protection, realizing the equipment-level intrinsic safety and preventing the happening of the back power.

Description

technical field [0001] The invention relates to the technical field of renewable energy power generation applications, in particular to a control unit of a zero-backflow control system applied to a municipal power grid. Background technique [0002] At present, renewable new energy including solar power generation and wind power generation is developing very rapidly. The current application methods are mainly divided into two types: off-grid type and grid-connected type. Among them, grid-connected type applications are divided into two types: reversible flow and non-reverse flow. [0003] The power generated by the reversible current grid-connected system can be directly transmitted to the grid, and enter the grid for unified deployment. [0004] The irreversible current grid-connected system is connected in parallel with the grid, so that the power of the renewable new energy system and the grid can be kept in sync, so as to jointly supply power to user loads. When the pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCY02A30/60
Inventor 刘叶冰贾宁王欣邢岩
Owner 西东控制集团(沈阳)有限公司