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Power electronic converter control method based on transient electromagnetic energy balance

A converter control, electromagnetic energy technology, applied in the output power conversion device, the conversion of AC power input to DC power output, electrical components and other directions, can solve the problem that the voltage or current closed-loop control strategy is difficult to achieve overall planning and other issues

Active Publication Date: 2013-02-13
TSINGHUA UNIV
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Problems solved by technology

[0011] When there are multiple sets of energy storage elements in the power electronic converter or control objectives with different properties (both control voltage and current), the traditional closed-loop control strategy of voltage or current is often difficult to achieve overall consideration

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  • Power electronic converter control method based on transient electromagnetic energy balance
  • Power electronic converter control method based on transient electromagnetic energy balance
  • Power electronic converter control method based on transient electromagnetic energy balance

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Embodiment Construction

[0077] According to the law of energy conservation, power electronic converters should maintain energy balance in any period of time, that is, the energy balance between input, output, loss and energy storage. Take a control cycle T of the power electronic converter s As an example, its energy distribution and flow as Figure 4 shown. The flow direction of input energy in a control cycle can be divided into four parts: the first part is converted into the loss on each resistance (including equivalent resistance) in the converter, the second part is converted into the magnetic field energy stored in the inductive element, and the third part Converted to the electric field energy stored in the capacitive element, the fourth part is output to the load of the converter. Here, the input energy, the output energy and the energy flowing to the energy storage element can all flow bidirectionally.

[0078] Assuming that there are m groups of inductive elements, n groups of capacitiv...

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Abstract

The invention relates to a power electronic converter control method based on transient electromagnetic energy balance, belonging to the technical field of power electronics. The power electronic converter control method based on transient electromagnetic energy balance is characterized in that the control objects of a power electronic converter are converted into the transient electromagnetic energy, the control objects of different dimensions are unified through the electromagnetic energy, the transient electromagnetic energy is adjusted in the dynamic-state process to track the target steady energy quickly, and the electromagnetic energy is kept in the allowed change range of the dynamic-output target energy value in the steady-state process. The power electronic converter control method based on transient electromagnetic energy balance can be applied to various power electronic converters. The experimental result proves that compared with the conventional control method, the power electronic converter control method based on transient electromagnetic energy balance helps to increases the dynamic response speed, eliminate the control overshoot and improve system reliability while guaranteeing the steady-state control precision.

Description

technical field [0001] The invention relates to a control method of a power electronic conversion system, belonging to the technical field of power electronics. Background technique [0002] The purpose of the converter is to realize the effective transformation of electromagnetic energy characteristics (power waveform, characteristic parameters, etc.). In order to obtain the desired conversion characteristics, most of the current power electronic converters use the PWM method to obtain the required power characteristics. The electromagnetic energy output by PWM is in the form of pulses and pulse sequences. The effective pulse energy And its sequence is the basic form in power electronic converter. This pulsed energy is a form of transient transformation of electromagnetic energy, with time constants typically in the range of microseconds or nanoseconds. This short-time-scale electromagnetic energy transient process plays a decisive role in the reliable operation of power ...

Claims

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Application Information

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IPC IPC(8): H02M1/00H02M7/483
Inventor 赵争鸣鲁挺贺凡波尹璐袁立强孙晓瑛
Owner TSINGHUA UNIV
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