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A Commutation Failure Protection Simulation Device

A commutation failure, protection simulation technology, applied in instruments, simulators, control/regulation systems, etc., can solve problems such as the inability to truly simulate the commutation failure protection operating state

Active Publication Date: 2015-12-16
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the simulation model does not involve the simulation of commutation failure protection, and cannot truly simulate the operation state of commutation failure protection of HVDC DC control and protection systems

Method used

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  • A Commutation Failure Protection Simulation Device
  • A Commutation Failure Protection Simulation Device
  • A Commutation Failure Protection Simulation Device

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Embodiment Construction

[0018] In order to better understand the above-mentioned technical solutions of the present invention, the following further describes in detail with reference to the accompanying drawings and embodiments.

[0019] figure 2 An embodiment of the commutation failure protection simulation device of the present invention is shown, which is connected to the DC system protection unit 300 of the DC control and protection system, and is used for the simulation of the DC control and protection system of HVDC equipment. The commutation failure 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 protection system. The simulation device for the DC control and protection system of HVDC equipment such as figure 1 Shown.

[0020] Such as figure 2 As shown, the commutation failure protection simulation device of the present invention includes a first commutation discrimination component 3010, a second c...

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Abstract

The invention provides a commutation failure protection simulation device, belongs to the field of electrical measurement and particularly relates to a commutation failure protection simulation test device used for high-voltage direct current transmission equipment in a direct current control protection system simulation research. A D bridge current signal end is connected with the input end of a first commutation discrimination assembly, a Y bridge current signal end is connected with the input end of a second commutation discrimination assembly, the output end of the first commutation discrimination assembly and the output end of the second commutation discrimination assembly are connected with a third arithmetic operation element, the output end of the third arithmetic operation element is respectively connected with a second comparator and a third comparator, the second comparator is connected with a first commutation failure protection signal end through a second timer, and the third comparator is connected with a second commutation failure protection signal end through a third timer and a fourth 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 a commutation failure protection simulation test device used for simulation research of a DC control protection system of high-voltage DC transmission equipment. Background technique [0002] The increasing demand for electricity has led to the development of long-distance, large-capacity and high-stability power transmission systems. With the continuous increase of UHV AC transmission projects and HVDC transmission projects in various grid areas, the power grids in areas with concentrated power consumption show obvious characteristics of UHV AC / DC hybrid receiving end grids with multiple DC feeds. The grid structure is tight, and the electrical distance between multiple AC and DC lines is closer. After UHV and EHV AC system failures, it is easy to cause simultaneous commutation failures of multiple DCs including HVDC, and commutation failures of multiple DCs The rec...

Claims

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Application Information

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