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No-load direct current voltage control simulation device

A technology of DC voltage and simulation devices, which is applied in general control systems, control/regulation systems, instruments, etc., and can solve problems such as the inability to truly simulate operating states

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

AI Technical Summary

Problems solved by technology

However, this simulation model does not involve the simulation of no-load DC voltage control, and cannot truly simulate the no-load DC voltage control operating state of the HVDC DC control protection system

Method used

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  • No-load direct current voltage control 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 no-load DC voltage control simulation device of the present invention is shown, which is connected to the converter tap control device 240 of the DC control and protection system for the simulation of the DC control and protection system of the HVDC transmission equipment. The no-load DC voltage control simulation device of the present invention is one of the basic functional units of the converter tap control device 240 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. The converter transformer tap control device 240 is a link in the direct current transmission control system for automatically adjusting the po...

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Abstract

The invention discloses a no-load direct current voltage control simulation device, belongs to the field of electrical measurement, and particularly relates to a testing device for direct current control and protection system simulation study of high-voltage direct current power transmission equipment. According to the no-load direct current voltage control simulation device, direct current voltage reference signals are connected to a mode selective switch through a first arithmetic operation element and a second arithmetic operation element; the direct current voltage reference signals are connected to a second joint gate through a third arithmetic operation element and a first Schmitt trigger; the direct current voltage reference signals are connected to a speed limiting device through a second proportional element and a fourth arithmetic operation element; a fifth arithmetic operation element is connected to the fourth arithmetic operation element; an output end of the speed limiting device is connected to the third arithmetic operation element and the fourth arithmetic operation element through a sixth arithmetic operation element and is connected to a first AND gate through a second Schmitt trigger; and an output end of the first AND gate forms a no-load direct current voltage rise signal end. The no-load direct current voltage control simulation device can truly simulate and reflect the operation state of a direct current control and protection device, and provides a corresponding simulation result for research or design of the direct current control and protection device.

Description

technical field [0001] The invention belongs to the field of electrical measurement, and in particular relates to a no-load direct current voltage control simulation test device used for simulation research on direct current control and protection systems 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 multipl...

Claims

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Application Information

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