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Voltage-based control method and device, computer equipment and storage medium

A control method and voltage technology, which are applied in the output power conversion device, electrical components, and the conversion of AC power input to DC power output, etc., can solve problems such as damage to single-phase modular multi-level converters

Pending Publication Date: 2022-03-04
SHENZHEN POWER SUPPLY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, the power supply mode of single-phase power frequency will cause the circulating current component in the bridge arm to flow into the DC side, which may damage the single-phase modular multilevel converter

Method used

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  • Voltage-based control method and device, computer equipment and storage medium
  • Voltage-based control method and device, computer equipment and storage medium
  • Voltage-based control method and device, computer equipment and storage medium

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Embodiment Construction

[0058] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0059] The voltage-based control method provided by this application can be applied to power grid systems, such as figure 1shown in the application environment. The application environment may include a converter 1 and a server 2, and the server 2 may be used to obtain the current value of the single-phase modular multi-level converter according to the current value of the upper and lower bridge arms of the single-phase modular multi-level converter The actual value of the circulating current of the bridge arm, and then obtain the voltage error reference value according t...

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Abstract

The invention relates to a voltage-based control method and device, computer equipment and a storage medium. The method comprises the following steps: according to current values of an upper bridge arm and a lower bridge arm of the single-phase modular multi-level converter, obtaining a ring current actual value of the bridge arms, according to the ring current actual value and a frequency doubling component current value, obtaining a voltage error reference value, according to the voltage error reference value and a voltage reference instruction value, obtaining a voltage reference value, and according to the voltage reference value, obtaining a current value of the bridge arms. And controlling the circulating current of the single-phase modular multilevel converter according to the voltage reference value. By adopting the method, the circulating current component in the bridge arm can be prevented from flowing into the direct current side, and the normal operation of the single-phase modular multilevel converter is ensured.

Description

technical field [0001] The present application relates to the technical field of power electronics, in particular to a voltage-based control method, device, computer equipment and storage medium. Background technique [0002] With the development of power electronics technology, the DC system based on the modular multi-level converter (Multi-level ModularConverter) can provide reactive power support to the passive network and realize multiple It has gradually been applied in the transformation and construction of electrified railways due to its advantages such as point power supply. [0003] Modular multilevel converters are divided into three-phase and single-phase. In the existing technology, in order not to reduce the motor output power of the locomotive, and considering the construction cost of catenary and power supply equipment, my country's electrified railway adopts single-phase Power frequency power supply mode. [0004] In the prior art, the power supply mode of s...

Claims

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Application Information

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IPC IPC(8): H02M7/00H02M7/483H02M7/5387H02M1/14
CPCH02M7/00H02M7/483H02M7/53871H02M1/14
Inventor 刘国伟郭佩乾袁志昌赵宇明王静
Owner SHENZHEN POWER SUPPLY BUREAU