Grid flicker safety protection method and device of ion electric propulsion system and storage medium

Abstract

The embodiment of the invention provides a grid flicker safety protection method of an ion electric propulsion system. The method comprises the following steps that (1), the current grid current Ib of the ion electric propulsion system is monitored; and (2), if the current grid current Ib is greater than a first set threshold value, it is judged that the current grid current Ib is an overcurrent signal, when the duration of the overcurrent signal is less than or equal to the time t0, the step (1) is executed, when the duration of the overcurrent signal is greater than the time t1, the operation of adjusting the grid voltage and the grid current to be 0 in the step (3) is executed, and when the duration of the overcurrent signal is greater than the time t0 and less than or equal to the time t1, the judgment and the operation in the step (4) are executed. By utilizing the technical scheme provided by the embodiment, safety protection can be provided for the ion electric propulsion system on the premise of avoiding frequent and repeated starting, and on-orbit safe operation of a satellite is guaranteed.

Description

technical field [0001] The invention relates to a grid flicker safety protection method, device, storage medium and computer program product of an ion electric propulsion system, belonging to the technical field of ion electric propulsion system safety protection. Background technique [0002] Due to the high power, for example, the 5kW multi-mode ion electric propulsion system has the characteristics of high specific impulse and long life. Many large advanced satellites are equipped with this ion electric propulsion system. The maximum working voltage of the electrode reaches 1450V. Due to dust, sputtering deposits, grid burrs and other reasons, when the ion thruster is ignited, an instantaneous grid short circuit phenomenon is inevitably generated, which is called grid flicker. [0003] Grid flicker is an inherent working characteristic of the ion thruster, because it involves an instantaneous short circuit of the high-voltage power supply. If there are no protective measu...

AI Technical Summary

Problems solved by technology

[0003]Grid flickering is an inherent working characteristic of ion thrusters, because it involves instantaneous short-circuit of high-voltage power supply, if there are no protective measures, it may affect the safety and security of the power supply and distribution of the entire star Electromagnetic compatibility poses a hazard, which may lead to satellite failure in severe cases

In the early on-orbit verification process of the foreign ion electric propulsion system, the mission failed due to the fault of the grid flicker of the ion electric propulsion system

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