Inverter maximum fire angle control simulation device

Abstract

The invention belongs to the field of electrical measuring, and particularly relates to an inverter maximum fire angle control simulation device used for simulation research of direct current control protecting systems of direct current high-voltage transmission equipment. The inverter maximum fire angle control simulation device comprises a sixth inertia element, a first trigonometric function element, a speed limiting device, a third trigonometric function element, a first arithmetic operation element, a second arithmetic operation element and a third arithmetic operation element. The input end of the sixth inertia element is connected to a signal input end through the first arithmetic operation element, and the output end of the sixth inertia element and the output end of the first trigonometric function element are combined through the second arithmetic operation element and then connected to the input end of the speed limiting device. The output end of the speed limiting device is connected to an inverter maximum fire angle signal end through the third trigonometric function element and the third arithmetic operation element in sequence. The inverter maximum fire angle control simulation device can truly simulate and reflect the operating states of direct current control protecting devices, and provides corresponding simulation results for the research or the design of the direct current control protecting devices.

Description

technical field [0001] The invention belongs to the field of electrical measurement, and in particular relates to an inverter maximum firing angle 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 inclu...

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Problems solved by technology

However, the simulation model does not involve the simulation of the maximum firing angle control of the inverter, and cannot truly simulate the operating state of the maximum firing angle control of the inverter in the HVDC DC control protection system

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