Power unit loss calculation method
A technology of a power unit and a calculation method, which is applied to the output power conversion device, the conversion of AC power input to AC power output, electrical components, etc., can solve problems such as difficulties in industrial application, and achieve the effect of easy centralized control and easy operation
Active Publication Date: 2019-01-11
SHANGHAI JIAOTONG UNIV
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In this regard, the paper "Loss Calculation of Modular Multilevel Converter, Power System Automation [J], 2015, 39(2): 112-118" published by Wang Haitian, Tang Guangfu, He Zhiyuan, etc. gives a A calculation method of switching loss, but only a brief description of the principle of loss calculation, and only for half-bridge structure power units, not involving full-bridge power units, and also does not involve the realization method and device design of loss calculation, the actual industry Difficulty applying
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[0047] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0048] The invention aims at the half-bridge structure and full-bridge structure power units commonly used in the existing high-power power electronic equipment. Under the full working condition of the power unit, the current data of the switching device is collected, combined with the device manual to automatically calculate the power unit loss, and record the corresponding data. Since the power of a single power unit is much smaller than the power of the overall equipment, and the switching frequency ...
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The invention provides a power unit loss calculation method and device, including: a DC power supply, a pre-charging module, a power unit module, a detection device, a control calculation module, and a man-machine interface module, wherein: the positive pole of the output terminal of the DC side and the pre-charging module The output terminal of the pre-charging module is connected to the positive pole of the DC side of the power unit module, the negative pole of the output terminal of the DC side of the DC power supply is connected to the negative pole of the DC side of the power unit module, and the AC output side of the power unit module is connected in parallel with the load resistor ; The detection device is used to measure the voltage and current data of the power unit module, and send the detected data to the control calculation module; the control calculation module is used to send the switch signal to the power unit module to control the power unit module Output the rated power and send the loss calculation result to the man-machine interface. The device in the invention can realize the output voltage control and protection functions of the power unit module, and the calculation process is simple.
Description
technical field [0001] The present invention relates to the field of loss analysis of high-voltage and high-power power electronic devices, in particular to a power unit loss calculation method and device, in particular to the loss calculation method and methods for power modules connected in series in modular multilevel converters device. Background technique [0002] With the development of modular multi-level technology, the application range of high-power power electronic devices (such as IGBT) is continuously expanding. In the application of high-power occasions, high-power power electronic devices are usually composed of power units, and then The cascaded connection of levels constitutes a modular multilevel converter, and its power unit is usually a half-bridge structure or a full-bridge structure, of which the half-bridge structure is mainly used in the field of DC transmission, and the full-bridge structure is mainly used in reactive power compensation or high-power...
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IPC IPC(8): H02M5/458
CPCH02M5/4585H02M1/0054Y02B70/10
Inventor 吴杰王志新
Owner SHANGHAI JIAOTONG UNIV