Overcurrent protection simulation device

A technology for overcurrent protection and simulation devices, which is applied in the direction of protection, instruments, simulators, etc. that respond to overcurrent, and can solve problems such as the inability to truly simulate the operating state of overcurrent protection

Inactive Publication Date: 2013-08-21
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this simulation model does not involve the simulation of over-current protection, and cannot truly simulate the operating state of over-current protection of HVDC DC control and protection systems

Method used

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  • Overcurrent protection simulation device
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Embodiment Construction

[0017] In order to better understand the above-mentioned technical solution of the present invention, a further detailed description will be given below in conjunction with the accompanying drawings and embodiments.

[0018] figure 2 An embodiment of the overcurrent protection simulation device of the present invention is shown, which is connected in the DC system protection unit 300 of the DC control and protection system and used for the simulation of the DC control and protection system of the high-voltage DC power transmission equipment. The overcurrent protection simulation device of the present invention is one of the basic functional units of the DC system protection unit 300 of the DC control and protection system. The simulation device of the DC control and protection system of HVDC transmission equipment is as follows: figure 1 shown.

[0019] Such as figure 2 As shown, the overcurrent protection simulation device of the present invention includes a first extrem...

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Abstract

The invention provides an overcurrent protection simulation device, belongs to the field of electrical measurement and particularly relates to an overcurrent protection simulation test device used for high-voltage direct current transmission equipment in direct current control protection device simulation researches. A D current signal end of a current converter and a Y current signal end of the current converter are connected with a second extreme value selector through a first extreme value selector. A neutral current signal end is connected with the second extreme value selector. The output end of the second extreme value selector is connected with a maximum current signal end. The maximum current signal end is connected with an input end of a second joint gate sequentially through a fourth timer and a sixth timer. The maximum current signal end is connected with the other input end of the second joint gate through a fifth timer. The output end of the second joint gate is connected with a first overcurrent protection signal end through a seventh timer. The device can truly simulate and reflect operation states of a direct current control protection device and provides corresponding simulation results for researches or design of the direct current control protection device.

Description

technical field [0001] The invention belongs to the field of electrical measurement, and in particular relates to an overcurrent protection simulation test device used for simulation research of a DC control and protection system of high-voltage direct current transmission equipment. Background technique [0002] The ever-increasing demand for electricity has led to the development of power transmission systems in the direction of long distance, large capacity and high stability. As the construction projects of UHV AC transmission projects and HVDC transmission projects in various power grid regions continue to increase, the power grids in areas where power consumption is concentrated show obvious characteristics of UHV AC-DC hybrid receiving-end power grids with multi-DC feeds. The power grid structure is tight, and the electrical distance between multiple AC and DC lines is closer. After the UHV and EHV AC systems fail, it is easy to cause multiple DCs including high-volta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B17/02H02H3/08
Inventor 崔勇郭强
Owner STATE GRID CORP OF CHINA
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