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Operational control method for two-stage matrix converter

A matrix converter, operation control technology, applied in the direction of AC power input conversion to AC power output, AC power input conversion to DC power output, high-efficiency power electronic conversion, etc., can solve the problem that the power side cannot be realized through PD feedback and PI adjustment Issues such as active damping and unity power factor operation

Inactive Publication Date: 2014-12-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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AI Technical Summary

Problems solved by technology

[0009] Aiming at the shortcomings of passive damping and the problem that existing modulation strategies cannot realize active damping and unit power factor operation on the power supply side through PD feedback and PI adjustment, the present invention proposes a new system closed-loop control structure

Method used

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  • Operational control method for two-stage matrix converter
  • Operational control method for two-stage matrix converter
  • Operational control method for two-stage matrix converter

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with accompanying drawing.

[0043] to solve image 3 The existing modulation strategy shown cannot realize the active damping and unit power factor operation of the power supply side through the method of closed-loop control, and the present invention proposes Figure 4 The closed-loop control structure of the system is shown. The closed-loop control of the whole system is divided into two parts: the closed-loop control of the inverter stage and the closed-loop control of the rectification stage. and image 3 The conventional dual space vector modulation strategy shown is different in that, Figure 4 Inverter modulation ratio m v Fixed to 1, while the rectification stage modulation signal is generated by the closed-loop control of the supply current. When setting m v When it is 1, the inverter stage does not have the voltage regulation function, and the DC bus voltage satisfies:

[0044] ...

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Abstract

The invention discloses an operational control method for a two-stage matrix converter and belongs to the field of two-stage matrix converter control. The method is applied to situations of active damping and unity power factor operation of a power supply side of the two-stage matrix converter. The method is based on a dual-space vector modulation strategy, the voltage modulation ratio of an inversion stage is fixed at 1, the current modulation ratio and the phase angle of a rectification stage and the phase angle of the inversion stage are changed to enable the input current of the rectification stage is controllable, a current loop of the power supply side is embedded into closed-loop control of an output side, and active damping control and the unity power factor operation of the power supply side are achieved with the method of proportional differential (PD) feedback and proportional integral (PI) adjustment. The method is clear in control mode, parameters are easy to adjust, and the method has relatively high theoretical research significance and practical value.

Description

technical field [0001] The invention relates to a dual-stage matrix converter, in particular to a control method for active damping and unit power factor operation at the power supply side of the dual-stage matrix converter, and belongs to the field of dual-stage matrix converter control. Background technique [0002] The two-stage matrix converter is a new type of matrix converter, which inherits the advantages of the traditional matrix converter, such as sinusoidal input and output currents, bidirectional energy flow, and no need for DC energy storage elements, and overcomes the latter's clamping circuit. It is an AC-AC converter with great development potential due to its disadvantages such as complex commutation control and the realization of zero-current commutation at the rectification level. [0003] A typical two-stage matrix converter application structure is as follows figure 1 As shown, it mainly includes power supply, input side LC filter, converter main circuit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/458H02M7/219H02M7/5387H02M1/42
CPCY02B70/126H02M1/126H02M5/297H02M1/0025
Inventor 雷家兴周波秦显慧刘晓宇黄海涛刘兵梁莹
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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