Airplane power grid voltage difference connection operation circuit

Abstract

Disclosed is an airplane power grid voltage difference connection operation circuit. An operational circuit is added between a generator and a hub voltage, the operational circuit comprises a first operational amplifier, a second operational amplifier, a first triode and a second triode, the hub voltage is compared with the voltage of the output end of the generator, and when the differential pressure connection condition is met, the operational circuit controls the generator main contactor to be connected, and the generator is connected into a power grid; when the voltage value output by thegenerator cannot meet the power supply requirement, the generator main contactor is disconnected, the operational circuit controls the generator contactor to be disconnected, and the generator exits the power grid. According to the airplane power grid voltage difference switching-on operation circuit, grid connection and grid disconnection are selected according to the actual working condition ofthe generator, automatic switching between grid connection and grid disconnection of the generator is achieved, a pilot does not need to judge and select, flight is prevented from being influenced bymanual misoperation or other reasons, and the stability of an airplane is improved.

Description

technical field [0001] The invention relates to the technical field of aircraft electrical systems, in particular to an aircraft power grid voltage difference connection operation circuit. Background technique [0002] According to its power source, the aircraft power supply system is generally designed with main power supply, secondary power supply, auxiliary power supply, backup power supply and emergency power supply. The main power system is the generator system driven by the engine, which provides all the power when the aircraft is in normal flight. As the core equipment in the main power system - the generator, the time when it is connected to the grid and withdrawn from the grid during normal operation is very important. Too early or too late will directly affect the stability of the main power system. The old-fashioned aircraft is designed with a low generator voltage alarm. When the output voltage of the generator cannot meet the demand, the pilot can judge the sta...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem of unsatisfactory results caused by the human operation of the existing aircraft sending into the network and withdrawing from the network, and to provide an aircraft power grid voltage difference connection operation circuit, when the output voltage of the generator meets the requirements, the generator is parallel Connected to the grid; when the output voltage of the generator is too low, let the generator withdraw from the grid, and choose the grid connection and withdrawal according to the actual working conditions of the generator, so as to realize the automatic switching of the generator grid connection and withdrawal from the grid, without the need for the pilot to judge the choice , to avoid the impact of flight due to human error or other reasons, and improve the stability of the aircraft

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