Back-to-back converter controller

A technology of back-to-back converters and controllers, applied in the direction of converting AC power input to AC power output, output power conversion devices, electrical components, etc. Unsatisfactory effect and other problems, to achieve good practical value, ensure accuracy, and easy to use

Active Publication Date: 2019-11-22
SHANGHAI DIANJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are disturbances such as harmonic interference, phase mutation, and voltage imbalance in the power grid. The disturbance is random and affects the output performance of the converter at any time. Therefore, the controller is required to have the ability of real-time regulation, but most traditional DSP controllers do not have Performance control function, and the traditional method is more difficult to design, and the realization effect is not ideal

Method used

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Examples

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Embodiment

[0049] This embodiment provides a back-to-back converter controller, including a current sampling unit, a grid side voltage sampling unit, a DC side voltage sampling unit, a PWM control unit, a current inner loop control unit, a voltage outer loop control unit and a phase locked loop, The current sampling unit is connected to the current inner loop control unit, the grid-side voltage sampling unit is connected to the current inner loop control unit through a phase-locked loop, and the current inner loop control unit is connected to the PWM control unit through the voltage outer loop control unit. The side voltage sampling unit is connected to the voltage outer loop control unit, the controller is equipped with a back-to-back converter control model, and the controller is an FPGA controller.

[0050] The process of obtaining the back-to-back converter control model is as follows:

[0051] I, this embodiment is first to figure 2 The topology diagram of the three-phase voltage ...

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PUM

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Abstract

The invention relates to a back-to-back converter controller. The system comprises a current sampling unit, a network side voltage sampling unit, a direct current side voltage sampling unit, a PWM control unit, a current inner loop control unit, a voltage outer loop control unit and a phase-locked loop. The current sampling unit is connected with the current inner loop control unit; the network side voltage sampling unit is connected with the current inner loop control unit through a phase-locked loop. The current inner loop control unit is connected with the PWM control unit through the voltage outer loop control unit, the direct current side voltage sampling unit is connected with the voltage outer loop control unit, the controller carries a back-to-back converter control model, and thecontroller is an FPGA controller. Compared with the prior art, based on the FPGA, the accuracy, the real-time performance and the robustness of the controller are ensured.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a back-to-back converter controller. Background technique [0002] In recent years, due to energy shortage and diversification of industrial loads, back-to-back voltage source converters characterized by full-control devices and PWM technology have attracted extensive attention in the fields of energy saving and new energy. At present, most converters use DSP as the controller. The control strategy is divided into indirect current control and direct current control according to whether the current feedback is introduced. The research on the control strategy of back-to-back converters mostly focuses on PWM (pulse width modulation) technology. There are two methods of positive selection pulse width modulation (SPWM) and space vector pulse width modulation (SVPWM). [0003] There are disturbances such as harmonic interference, phase mutation, and voltage imbalance in the power grid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/458
CPCH02M5/4585
Inventor 翟宏宇陈国初幸宗国
Owner SHANGHAI DIANJI UNIV
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