Simulator for minimum trigger angle limiter of rectifier

Abstract

The invention belongs to the field of electrical measurement, and relates to a simulator for a minimum trigger angle limiter of a rectifier. The simulator for the minimum trigger angle limiter of the rectifier is used for simulation researches on a direct-current control protection system of high-voltage direct-current power transmission equipment. A first inertial element and a first arithmetic operation element are connected to a Schmitt trigger, an output end of the Schmitt trigger is connected to a first trigger signal forming module, a second inertial element and a second arithmetic operation element are connected to a comparator, an output end of the comparator is connected to a second trigger signal forming module and connected to an AND gate through a second OR gate, the trigger signal forming module comprise a first inverter, a first timer, a second timer, a third timer, a first OR gate and an SR (synchronous rectifier) trigger, and the first inverter is connected to the SR trigger through the second timer. The simulator is capable of truly simulating and reflecting running statues of a direct-current control protection device, and corresponding simulation results are provided for researches and 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 rectifier minimum firing angle limiter 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 inclu...

AI Technical Summary

Problems solved by technology

However, this simulation model does not involve the simulation of the minimum firing angle limiter of the rectifier, and cannot truly simulate the operating state of the minimum firing angle limiter of the rectifier in the DC control and protection system of HVDC transmission

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