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A low-voltage current-limiting control simulation device

A simulation device, low-voltage current-limiting technology, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as the inability to truly simulate the low-voltage current-limiting control operating state

Active Publication Date: 2016-01-27
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 low-voltage current-limiting control, and cannot truly simulate the operating state of low-voltage current-limiting control of the HVDC DC control and protection system

Method used

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  • A low-voltage current-limiting control simulation device
  • A low-voltage current-limiting control simulation device
  • A low-voltage current-limiting control simulation device

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Embodiment Construction

[0018] 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.

[0019] figure 2 An embodiment of the low-voltage current-limiting control simulation device of the present invention is shown, which is connected to the converter firing angle control device of the DC control and protection system and used for the simulation of the DC control and protection system of the high-voltage DC transmission equipment. The low-voltage current limiting control simulation device of the present invention is one of the basic functional units of the converter firing angle control device 220 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.

[0020] Such as figure 2 As shown, the low-voltage current-limiting control simulation...

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Abstract

The invention discloses a low-voltage current-limiting controlling simulation device, belongs to the field of electrical measurement, and relates to a low-voltage current-limiting controlling simulation device used for simulation researching of a direct current controlling protecting system of high-voltage direct current transmission equipment. The low-voltage current-limiting controlling simulation device comprises a comparator, a first inertial element, a second inertial element, a third inertial element, a first mode selection switch, a second mode selection switch and a multi-way selection module; an output end of the first inertial element is connected to the first mode selection switch. Output ends of the second inertial element and the third inertial element are connected to the second mode selection switch; an output end of the second mode selection switch is connected to an input end of the multi-way selection module; an input end of the multi-way selection module is connected to an inverter largest trigger angle controlling device of a converter trigger angle controlling device. The low-voltage current-limiting controlling simulation device can simulate and reflect an operation state of a direct current controlling protecting device truly, and provides a corresponding simulation result for researching or design of the direct current controlling protecting device.

Description

technical field [0001] The invention belongs to the field of electric measurement, and in particular relates to a low-voltage current-limiting control 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...

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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