Trigger pulse closed-loop circuit controlling simulation device

Abstract

The invention discloses a trigger pulse closed-loop circuit controlling simulation device, belongs to the field of electrical measuring, and relates to the trigger pulse closed-loop circuit controlling simulation device used for simulation researching of a direct current controlling protecting system of high-voltage direct-current transmission equipment. A trigger angle command signal end passes through a delay element, a first speed limiting device and a trigonometric function element sequentially, and is connected to a first extreme value selector. The first extreme value selector passes through a third arithmetic operation element, a second speed limiting device and a fourth arithmetic operation element sequentially, and is connected to a fifth arithmetic operation element. The first extreme value selector then passes through a third speed limiting device, a sixth arithmetic operation element and a fourth speed limiting device sequentially, and is connected to the trigger angle command signal end, and closed-loop current control connection is formed. An upper limit and lower limit selection module is connected to an upper limit and lower limit selection end of the fourth speed limiting device. The trigger pulse closed-loop circuit 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 electrical measurement, and in particular relates to a trigger pulse closed-loop current control simulation test device 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 includi...

AI Technical Summary

Problems solved by technology

However, this simulation model does not involve the simulation of trigger pulse closed-loop current control, and cannot truly simulate the operation state of trigger pulse closed-loop current control of the HVDC DC control and protection system

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