A filter switching control simulation device

Abstract

The invention provides a filter switching control simulation device, belongs to the field of electrical measuring, and particularly relates to a testing device for simulation research of direct current control protective systems of direct current high-voltage transmission equipment. A filter switching amount signal is connected to a first joint gate through a first comparator and a second comparator, the output end of the first joint gate is connected to a first timer, the output end of the first timer is connected to a first conjunction gate through a first phase inverter and connected to a second conjunction gate through a third phase inverter, an unlocking signal end is connected to the first conjunction gate and the second conjunction gate through a first edge detecting element and a second phase inverter, the output end of the first conjunction gate and the output end of the second conjunction gate are connected to a plus count input end of a bidirectional counter and a subtraction count input end of the bidirectional counter respectively, and a signal output end of the simulation device is formed by the output end of the bidirectional counter. The filter switching control simulation device can truly simulate and reflect the operating states of direct current control protective devices, and provides corresponding simulation results for the research or the design of the direct current control protective devices.

Description

technical field [0001] The invention belongs to the field of electrical measurement, and in particular relates to a tap position 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 DCs to f...

AI Technical Summary

Problems solved by technology

However, the simulation model does not involve the simulation of the tap position, so it cannot truly simulate the tap position operation status of the HVDC DC control and protection system

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