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METHOD OF CONTROLLING THE SWITCHING OF A MULTILEVEL CONVERTER, A CONTROLLER FOR A MULTILEVEL CONVERTER, AND A COMPUTER PROGRAM FOR CONTROLLING A CONVERTER

机译：控制多级转换器的切换的方法，用于多级转换器的控制器以及用于控制转换器的计算机程序

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摘要

A method of controlling a multilevel converter, a computer program and a controller for a converter is provided. The method includes determining a transition voltage (vstep) from a control period (k) to a following control period (k+1), analyzing (104) the switching cells (SC1, SC2, SC3, SCn) of each phase leg, selecting (111) capacitors to provide the transition voltage and synthesize the output voltage for the following control period (k+1), and connecting (113) the selected capacitors during the following control period (k+1). Especially, the analyzing (104) of each switching cell (SC1; SC2; SC3; SCn) comprises analyzing (104) a first switching leg (SL1) and a second switching leg (SL1) of the switching cell (SC1; SC2; SC3; SCn), and the method includes determining (105) whether a change of state of the first switching leg (SL1) would contribute to the direction of the transition voltage, and determining (105) whether a change of state of the second switching leg (SL2) would contribute to the direction of the transition voltage, and determining (107) the internal conditions of each of the first (SL1) and the second switching leg (SL2) that are determined as contributing to the transition. Thus, the two legs of the H-bridge are analyzed separately. The selecting (111) of capacitors is performed by selecting (111) the capacitors of the switching legs (SL1; SL2) of the phase leg (PA, PB, PC) for the transition voltage on the basis of the determined internal conditions of the switching legs (SL1, SL2), including comparing the internal conditions of all the switching legs (SL1; SL2) of the phase leg (PA, PB, PC). A controller (40) is configured to control the multilevel converter by performing the method.

机译：提供了一种控制多级转换器的方法，计算机程序和用于转换器的控制器。该方法包括确定从控制周期（k）到随后的控制周期（k + 1）的转变电压（vstep），分析（104）每个相脚的开关单元（SC1，SC2，SC3，SCn），选择（111）个电容器提供过渡电压并合成随后控制周期（k + 1）的输出电压，并在随后的控制周期（k + 1）中连接（113）所选电容器。特别地，每个交换单元（SC1，SC2，SC3，SCn）的分析（104）包括分析（104）交换单元（SC1，SC2，SC3的第一交换支路（SL1）和第二交换支路（SL1）。 ; SCn），并且该方法包括确定（105）第一开关臂的状态变化（SL1）是否有助于转变电压的方向，以及确定（105）第二开关臂的状态变化是否（SL2）将有助于转变电压的方向，并且确定（107）被确定为有助于转变的第一开关腿（SL1）和第二开关腿（SL2）中的每一个的内部条件。因此，将分别分析H桥的两条腿。电容器的选择（111）是根据所确定的内部条件，通过选择（111）相支路（PA，PB，PC）的开关支路（PA，PB，PC）的开关支路（SL1，SL2）的电容器来进行的。开关脚（SL1，SL2），包括比较相脚（PA，PB，PC）的所有开关脚（SL1，SL2）的内部条件。控制器（40）被配置为通过执行该方法来控制多级转换器。

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公开/公告号CA2957833C

专利类型
公开/公告日2018-04-03

原文格式PDF
申请/专利权人 ABB SCHWEIZ AG;
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申请/专利号CA20142957833
发明设计人 TOWNSEND CHRISTOPHER;ZELAYA DE LA PARRA HECTOR;
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申请日2014-08-11
分类号H02M7/483;
国家 CA
入库时间 2022-08-21 12:47:57

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