Fault diagnosis method for sequentially switched parallel regulator

Abstract

The invention provides a fault diagnosis method for a sequentially switched parallel regulator. The method comprises the following steps that the work state of the sequentially switched parallel regulator in a faultless condition is analyzed; a fault mode of the sequentially switched parallel regulator is obtained by analysis; a detection point is selected for the solar cell sub-array voltage corresponding to each shunting adjustment circuit, and a sampling frequency is selected; the time length of sampling data is selected, and covers the complete switching period of the solar cell sub-arrayvoltage; the solar cell sub-array voltage corresponding to each shunting adjustment circuit is sampled, and an adjusted level is searched for; according to the found adjustment level, fault diagnosisis carried out; and sampling and diagnosis in the next round is turned to. According to technical schemes of the invention, it is only required to add the detection quantity of the solar cell sub-array voltage to each shunting adjustment circuit to carry out detection and positioning accurately, the method is simple, the fault detecting rate is high, the fault can be located rapidly and diagnosedrapidly, and fewer detection quantities are added.

Description

technical field [0001] The invention relates to the field of fault diagnosis of spacecraft power supply controllers, in particular to a fault diagnosis method for sequential switching shunt regulators. Background technique [0002] Shunt regulators are widely used in spacecraft power controllers to regulate the output power of solar arrays and bus voltage. From the perspective of energy transmission, the topology of the spacecraft power system can be divided into direct energy transfer (DET) and peak power tracking. Shunt regulators are commonly used in applications such as figure 1 The DET topology shown. [0003] The block diagram of the prior art sequence switch shunt adjustment principle is as follows: figure 2 As shown, the shunt regulator divides the solar array into n identical sub-arrays, the positive end of each sub-array is grounded through the switch tube T, and connected to the bus V through the diode D bus . According to the different states of the switchi...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above technical problems, the present invention discloses a fault diagnosis method for a sequential switch shunt regulator, which solves the problem that the current fault diagnosis method cannot accurately detect and locate the fault of the shunt regulator, shortens the time for fault detection and location, and improves the accuracy of fault detection. and positioning accuracy

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