An overvoltage control simulation device

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

Inactive Publication Date: 2015-11-18
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 overvoltage control, and cannot truly simulate the overvoltage control operating state of the HVDC DC control and protection system

Method used

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  • An overvoltage control simulation device
  • An overvoltage 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 overvoltage 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 direct current transmission equipment. The overvoltage 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 overvoltage control simulation device of the present invention includ...

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Abstract

The invention provides an overvoltage control simulation device, belongs to the field of electrical measurement and particularly relates to an overvoltage control simulation test device used for high-voltage direct current transmission equipment in direct current control protection system simulation researches. A direct current voltage signal is connected with an extreme value selector through a first absolute value arithmetic unit, a second arithmetic operation element and a second absolute value arithmetic unit. The output end of the extreme value selector is connected with a control signal generation module, a first mode selective switch and a second mode selective switch, and the first mode selective switch is connected with an upper limit signal end of an integrator. The extreme value selector is connected with an inertial element and the integrator through a third arithmetic operation element, is connected with a speed limiting device through a fourth arithmetic operation element, and is connected with an overvoltage limit signal output end through the second mode selective switch. 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 overvoltage 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 high-voltage ...

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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