A low harmonic inhibitory control method applied to high -power power system

Abstract

The invention discloses a low-order harmonic suppression hybrid control method applied to a high-power power supply system. The steps include: 1. setting a DC voltage required for plasma operation as a reference voltage; 2. using a phase shift control method to obtain any two Determine whether the reference voltage is within the variation range of the DC output voltage. If it is, it means that the phase shift control method can be used to control the real-time output voltage of each converter unit, so that any two The firing angle of the converter unit keeps a certain phase difference, otherwise, the real-time output voltage of each converter unit is controlled by the series sequence control method, so that the high-power power system uses the hybrid control method to control the voltage of each converter unit under the full-scale voltage change. Real-time output voltage so that it responds to the reference voltage. The invention can effectively suppress low-order harmonics and improve the voltage response performance, thereby improving the operation reliability of the power supply system.

Description

technical field [0001] The invention belongs to the technical field of high-power power supply management, in particular to a low-order harmonic suppression hybrid control method applied to a high-power power supply system. Background technique [0002] Energy shortage is a common problem faced by human society. As a kind of new energy, nuclear fusion energy is regarded as the most ideal energy for human beings due to its own cleanliness and comprehensiveness of raw materials. Magnetic confinement nuclear fusion devices represented by tokamak are considered as At present, it is the most likely means to realize the steady-state operation of controllable nuclear fusion. [0003] In the magnetic confinement nuclear fusion device, the high-power power converter system provides controllable electrical energy for the magnets, and the reasonable series connection of each converter unit in the high-power power system adopts the series sequence control method to meet the operation r...

AI Technical Summary

Problems solved by technology

Therefore, during the operation of the system, the firing angle of the converter will change randomly, generating a large number of non-characteristic sub-harmonics with complex spectrum, especially low-order harmonics, which will be amplified by the SVC on the grid side, which is a threat to the safety of the power system Reliable operation presents certain challenges

[0004] At present, the control measures for low-order harmonics include improving low-frequency band damping and introducing filtering devices, etc., but they have not achieved good results. Its feasibility, reliability and economy still need to be improved and perfected.

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