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Method for determining loss of modular multilevel converter valve and simplified method

A modular multi-level, method-determined technology, applied in the direction of power transmission AC network, AC power input conversion to DC power output, electrical components, etc., can solve the problem of not being able to quickly and accurately calculate device losses, and achieve high accuracy, Calculate the direct effect

Active Publication Date: 2018-03-30
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for determining the loss of a modular multilevel converter valve and a simplified method, which solves the problem that the loss of the device cannot be calculated quickly and accurately

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  • Method for determining loss of modular multilevel converter valve and simplified method
  • Method for determining loss of modular multilevel converter valve and simplified method
  • Method for determining loss of modular multilevel converter valve and simplified method

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Embodiment Construction

[0041]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] figure 1 It is a flowchart of a method for determining the loss of a modular multilevel converter valve according to an embodiment of the present invention. see figure 1 , a modular multilevel converter va...

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Abstract

The invention discloses a method for determining the loss of a modular multilevel converter valve and a simplified method. The method for determining the loss of a modular multilevel converter valve includes the following steps: constructing a temperature rise function according to the junction temperature value and power loss of a power device; constructing a true temperature rise function f<2>(T<j_*>)= T<j_*>-TR; calculating out the intersection point of the temperature rise function and the true temperature rise function, wherein the junction temperature value corresponding to the intersection point is the true junction temperature of the power device after the power device stably works for a long time; obtaining the true loss of the power device according to the true junction temperature; obtaining the total loss of a multilevel converter valve sub module according to the true loss of all power devices in the multilevel converter valve sub module; and calculating the final loss ofthe modular multilevel converter valve according to a formula P<MMC>=P<1>N. By using the method or the simplified method, the loss of a device can be determined quickly and accurately.

Description

technical field [0001] The invention relates to the field of loss calculation of a modular multilevel converter, in particular to a method for determining the loss of a modular multilevel converter valve and a simplified method. Background technique [0002] As a new generation of DC transmission technology, flexible DC transmission technology uses a voltage source converter composed of fully controlled power electronic devices to replace the current source converter based on half-controlled thyristor devices in traditional DC transmission. Compared with traditional DC power transmission, flexible DC power transmission does not require commutation current provided by the AC system, so it can be used to supply power to the passive grid; it can completely independently control active power and reactive power within its operating range, achieving fast and flexible It can control the active power and dynamically compensate the reactive power of the AC bus, etc.; it can reverse t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36H02M7/00
CPCH02J3/36H02J2203/20H02M7/00Y02E60/60
Inventor 高剑剑齐磊仝翠芝王鑫易荣岳伟
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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