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IGCT-MMC loss analysis method based on average value equivalence

A technology of loss analysis and average value, which is applied to output power conversion devices, electrical components, and the conversion of AC power input to DC power output. Small, high accuracy, low loss effect

Active Publication Date: 2021-03-23
CHINA THREE GORGES CORPORATION +1
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Problems solved by technology

In fact, since there are usually hundreds of modules in a high-voltage and large-capacity MMC, and the number of sub-modules is huge, the method of simulating the switching process of each sub-module by simulation calculation, and then calculating its loss through the actual current waveform of the device requires a large amount of calculation. , especially when it is necessary to frequently optimize circuit parameters and estimate sub-module losses, the calculation time required is long, and it is cumbersome to analyze losses through simulation

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  • IGCT-MMC loss analysis method based on average value equivalence
  • IGCT-MMC loss analysis method based on average value equivalence
  • IGCT-MMC loss analysis method based on average value equivalence

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[0038]In order to make the objects, technical solutions, and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be described in contemplation in the embodiment of the embodiment of the present invention. It is a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, there are all other embodiments obtained without making creative labor without making creative labor premises.

[0039] The integrated door transverse thyristor (IGCT) has the advantage of low pond-state loss, strong flow capacity, and still has the potential to develop, suitable for the application of modular multi-level converters (MMC). The present invention describes a method of equivalent an average value is applied to the loss assessment principle and calculation method of MMC based on IGCT devices. In particular, some of the loss of the IGCT device, the buffer circuit, a...

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Abstract

The invention provides an IGCT-MMC loss analysis method based on average value equivalence. The IGCT-MMC loss analysis method comprises the following steps of: step a, determining a modular multilevelconverter (MMC) sub-module topological structure based on an integrated gate commutated thyristor (IGCT) device; b, establishing an average value equivalent model; c, evaluating the loss of sub-module IGCT devices, buffer circuits and energy taking power supplies in the IGCT-MMC operation process based on the average value equivalent model; and d, obtaining an IGCT-MMC complete machine loss analysis result based on the evaluation of the sub-modules in the step c. According to the method, based on the average value equivalent model, the losses of the sub-module IGCT devices, buffer circuits, energy taking power supplies and the like in the IGCT-MMC operation process are evaluated, and the losses are compared with the losses of the IGBT-MMC scheme of the same grade.

Description

Technical field [0001] The present invention belongs to the field of modular multi-level converter loss assessment, and in particular, the present invention relates to an IGCT-MMC loss analysis method based on an average value equivalent. Background technique [0002] Renewable energy utilization is the general trend in the development of future energy fields. It is predicted that by 2050, China's renewable energy will account for more than 50% of the energy consumption. High Voltage DirectCurrent Voltage Source Con-Vertcurrent Voltage Source Con-Vertcurrent Voltage Source Con-Vertcurrent Voltage Source Con-Vertcurrent Voltage Source Con-VERTER, HVDC-VSCs are widely used in renewable energy grids with high adjustment, low harmonics, and high efficiency. Modular Multiplevel Converter (MMC) is one of the common topologies of HVDC-VSC technology. At present, the insulated gate bipolartransistor, IGBT is widely used in MMC in MMC with its high pressure, high-pass, high switching freq...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/483H02M7/521
CPCH02M7/483H02M7/521
Inventor 曾嵘孙长平赵彪郭明珠白睿航唐博进余占清周兴达宋强翟冬玲屈鲁
Owner CHINA THREE GORGES CORPORATION
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