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Flexible direct-current transmission synthetic loss calculation method

A technology of flexible DC power transmission and calculation methods, which is applied in calculation, electrical digital data processing, design optimization/simulation, etc., and can solve problems such as the inability to take into account the dynamic characteristics of switching devices in detail

Inactive Publication Date: 2018-06-01
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +3
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The existing loss calculation uses the average method, which cannot take into account the dynamic characteristics of the switching device in detail

Method used

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  • Flexible direct-current transmission synthetic loss calculation method
  • Flexible direct-current transmission synthetic loss calculation method
  • Flexible direct-current transmission synthetic loss calculation method

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Embodiment Construction

[0092] The detailed content of the present invention and its specific implementation will be further described below in conjunction with the accompanying drawings.

[0093] see Figure 1 to Figure 3 As shown, the comprehensive loss calculation method of the flexible DC power transmission of the present invention can roughly divide the losses into converter valve losses, converter transformer losses, reactor losses, and filter losses. figure 2 It is the topological structure diagram of MMC. Each converter station contains multiple valves, and each valve is composed of multiple voltage source converter valve stages. Therefore, the loss of each valve stage is calculated first, and then added together to obtain the total loss of all valves. The converter valve loss is the loss of IGBT and diode, including on-state loss, turn-on loss and turn-off loss. The power loss of the converter is mainly caused by its switching device (IGBT) and its anti-parallel diode, including: IGBT on-...

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Abstract

The invention relates to a flexible direct-current transmission synthetic loss calculation method and belongs to the field of flexible direct-current transmission. Synthetic loss comprises converter valve loss, converter transformer loss, reactor loss and filter loss, wherein the power loss of a converter is mainly caused by a switching device (IGBT) and antiparallel diodes of the converter and mainly comprises IGBT conduction loss, IGBT switching loss, diode conduction loss and diode reverse recovery loss. The method fills up the blank of flexible direct-current transmission synthetic loss calculation and is a relatively complete loss calculation method. The calculation result of the method meets the engineering practical requirement and has guidance significance for practical engineeringapplication.

Description

technical field [0001] The invention relates to the field of flexible direct current transmission, in particular to a calculation method for comprehensive loss of flexible direct current transmission. Background technique [0002] my country's power grid has entered the era of ultra-high voltage and large-scale interconnected power grids. The national power grid interconnection requires the power industry to adopt more flexible, economical and environmentally friendly power transmission and distribution methods to meet technical, economic and environmental challenges. The demand for electronic devices is also becoming increasingly urgent. The technical advantages of voltage source converter type direct current transmission using fully controlled power electronic devices make it play an active role in the fields of renewable energy grid connection, passive network power supply, urban power grid power supply, asynchronous AC grid interconnection, etc. Great development has bee...

Claims

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Application Information

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IPC IPC(8): G06F17/50H02J3/36
CPCG06F30/20H02J3/36Y02E60/60
Inventor 阳岳希许韦华涂莉江伟张慧瑜杜镇宇黄道姗张迪辛业春
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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