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Multi-purpose two-way power electric test power supply system and control method thereof

A technology of power test power supply and control method, applied in control/regulation system, output power conversion device, conversion of DC power input to DC power output, etc., can solve the problem that the output DC voltage cannot be adjusted in a wide range, inappropriate circuit schemes, etc problem, to achieve the effect of low harmonic content, low total harmonic distortion rate and high efficiency

Active Publication Date: 2016-10-12
STATE GRID FUJIAN ELECTRIC POWER CO LTD +2
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Problems solved by technology

Therefore, its output DC voltage cannot be adjusted in a wide range, so it is not suitable as a circuit solution for power test power supply

Method used

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  • Multi-purpose two-way power electric test power supply system and control method thereof
  • Multi-purpose two-way power electric test power supply system and control method thereof
  • Multi-purpose two-way power electric test power supply system and control method thereof

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Embodiment Construction

[0036] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0037] The present invention provides a full digital control bidirectional power test power supply system, such as figure 1 As shown, the whole system adopts a control core, by sampling the voltage and current values ​​of each key point, after AD conversion, the control of the front and rear two-stage switch tubes of the bidirectional power test power supply is realized through the corresponding digital control strategy.

[0038] Further, in this embodiment, as figure 2 As shown, it is the control block diagram of the full digital system of the two-way power test power supply. The front and rear stages share a controller (controller), through sampling AC voltage, AC current, DC bus voltage, transformer primary current, output DC voltage and current, etc. Variables are sent to the controller after A / D conversion, and then calculated acco...

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Abstract

The invention relates to a multi-purpose two-way power electric test power supply system and a control method thereof. The system comprises a PWM reversible rectifier and an active clamp two-way DC / DC converter. The method comprises the steps as follows: a single-polarity SPWM control is adopted at a first stage; a first stage circuit has a power factor correcting function when power flows forwardly, and a PF value is very high; when the power reversely flows, the total harmonic distortion is low; a phase shift control or a PWM control is adopted at a second stage; when the power flows forwardly, the adjustment range of output DC voltage is wide; and after an active clamp circuit is adopted, soft switching of a switch tube of a second stage circuit is achieved, so that the multi-purpose two-way power electric test power supply system has relatively high efficiency under different load conditions. An all-digital control is adopted by a power supply; compared with a traditional electric test power supply, the multi-purpose two-way power electric test power supply system has the characteristics of being small in size, light in weight, diverse in function and the like, and is suitable for the occasions of electric operation, an inspection experiment, storage battery charging and discharging and the like.

Description

technical field [0001] The invention relates to a multi-purpose bidirectional power test power supply system and a control method thereof. Background technique [0002] In order to meet the needs of safe production, the power system needs to be equipped with a variety of commonly used DC power supplies, such as DC panels, power test power supplies, battery charging and discharging instruments, wall-mounted power supplies, etc. [0003] The electric power test power supply is suitable for power plants, substations and large and medium-sized industrial enterprises. It can be used as a standard relay protection test power supply; it can also be used as a portable DC power supply to provide guarantee for reliable power supply of secondary equipment. my country's electric power industry is developing towards a safe, stable, economical and clean modern energy industry system, and the demand for power test power supplies in power operation and maintenance tests is increasing. [0...

Claims

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Application Information

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IPC IPC(8): H02M7/797H02M3/335
CPCH02M3/3353H02M3/33561H02M7/797
Inventor 范彦琨陈光焰熊旭陈颖霞许泓吕小伟
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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