Failure protection method for high-order energy gaining power supply

Abstract

The invention relates to a failure protection method for a high-order energy gaining power supply, which comprises the following steps of: acquiring energy from a DC side capacitor by using the energy gaining power supply, and providing power for an upper insulated gate bipolar transistor (IGBT) driving and central control unit and a lower insulated gate bipolar transistor (IGBT) driving and central control unit; monitoring a failure; processing a power-off failure; and processing an electrified failure, wherein the failure monitoring comprises the monitoring of input voltage amplitude and a voltage up-conversion rate du / dt and the monitoring of amplitude of three paths of transmission voltages; the power-off failure processing refers to associated protection performed under the conditions of no output of the power supply and power-off of a power module controller when a power module is failed to start; and the electrified failure processing refers to the associated protection performed at the occurrence of a power failure during the electrified working of the power module when the power supply has an output voltage. In the scheme provided by the invention, the protection associated with the other parts of the power module is added on the basis of normal power control protection, and high voltage IGBT converter valve protection is effectively realized at the output power-off failure and the output electrified failure of the energy gaining power supply.

Description

A fault protection method for high-level energy harvesting power supply technical field The invention relates to a protection method for a power supply, in particular to a fault protection method for a high-position energy-taking power supply using a high-voltage / ultra-high-voltage high-power tube IGBT converter valve. Background technique For high-voltage / ultra-high-voltage converters in power systems, IGBT converter valves are used more and more. Since the potentials of each power module in the converter valve are different and at a higher potential, it is necessary to solve the high potential of the power module controller. Reliable power supply issues. At present, there are two common types of low-voltage energy delivery and high-voltage energy harvesting. Low-voltage energy transmission means that the ground potential power supply is isolated by high voltage and then supplies power to the power module controller. There are problems such as external insulation and st...

AI Technical Summary

Problems solved by technology

Low-voltage energy transmission means that the ground potential power supply is isolated from the ground potential and then supplied to the power module controller. There are problems such as external insulation and structural installation. The volume and cost of the equipment are large, and it is generally used in relatively low-voltage applications.

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