公开(公告)号：US09083261B2

公开(公告)日：2015-07-14

申请号：US13682996

申请日：2012-11-21

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Wenqiang Yang ,  Ling Luo ,  Yunfeng Liu ,  Anthony Michael Klodowski ,  Robert Gregory Wagoner ,  Robert Allen Seymour

IPC: H02M7/487 ,  H02M5/458

CPC classification number: H02M5/458 ,  H02M7/487

Abstract: A control system includes a fundamental control unit, first and second compensation control units, a switch control unit, and a switch implementation unit. The fundamental control unit generates fundamental commands to implement fundamental power conversion operation for a converter. The first compensation control unit generates a first compensation signal for injection into the fundamental command to balance neutral point voltage when the converter is in operation in a first state. The second compensation control unit generates a second compensation signal for injection into the fundamental command to balance neutral point voltage when the converter is in operation in a second state. The switch control unit detects first and second states of the converter and provides first and second switch signals respectively. The switch implementation unit switches the fundamental control unit to communicate with the first and second compensation control units according to the first and second switch signals respectively.

Abstract translation: 控制系统包括基本控制单元，第一和第二补偿控制单元，开关控制单元和开关实施单元。 基本控制单元产生用于实现转换器的基本功率转换操作的基本命令。 第一补偿控制单元在转换器在第一状态下运行时产生用于注入基本命令的第一补偿信号以平衡中性点电压。 第二补偿控制单元在转换器在第二状态下运行时产生用于注入基本命令的第二补偿信号以平衡中性点电压。 开关控制单元检测转换器的第一和第二状态，分别提供第一和第二开关信号。 开关实施单元切换基本控制单元，以分别根据第一和第二开关信号与第一和第二补偿控制单元通信。

公开(公告)号：US09071084B2

公开(公告)日：2015-06-30

申请号：US13682938

申请日：2012-11-21

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Wenqiang Yang ,  Anthony Michael Klodowski ,  Robert Allen Seymour

IPC: H02M5/458 ,  H02J3/36 ,  H02M7/487

CPC classification number: H02J3/36 ,  H02M7/487

Abstract: A control system includes first and second fundamental control units for generating first and second fundamental commands, and a compensation control unit. The compensation control unit includes first and second calculation elements and a comparator for comparing first and second modulation indexes. When the first modulation index is less than the second modulation index, the first calculation element generates a first source-side compensation command. When the first source-side compensation command is not sufficient to balance the neutral point voltage, the first calculation element further generates a first line-side compensating command. When the first modulation index is greater than the second modulation index, the second calculation element generates a second line-side compensation command. When the second line-side compensation command is not sufficient to balance the neutral point voltage, the second calculation element further generates a second source-side compensating command.

Abstract translation: 控制系统包括用于产生第一和第二基本命令的第一和第二基本控制单元和补偿控制单元。 补偿控制单元包括第一和第二计算元件和用于比较第一和第二调制指数的比较器。 当第一调制指数小于第二调制指数时，第一计算元件产生第一源侧补偿命令。 当第一源极补偿指令不足以平衡中性点电压时，第一计算元件进一步产生第一线路侧补偿命令。 当第一调制指数大于第二调制指数时，第二计算元件产生第二行侧补偿命令。 当第二线路侧补偿命令不足以平衡中性点电压时，第二计算元件进一步产生第二源侧补偿命令。

公开(公告)号：US20130128632A1

公开(公告)日：2013-05-23

申请号：US13682996

申请日：2012-11-21

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Wenqiang Yang ,  Ling Luo ,  Yunfeng Liu ,  Anthony Michael Klodowski ,  Robert Gregory Wagoner ,  Robert Allen Seymour

IPC: H02M5/458

CPC classification number: H02M5/458 ,  H02M7/487

Abstract: A control system includes a fundamental control unit, first and second compensation control units, a switch control unit, and a switch implementation unit. The fundamental control unit generates fundamental commands to implement fundamental power conversion operation for a converter. The first compensation control unit generates a first compensation signal for injection into the fundamental command to balance neutral point voltage when the converter is in operation in a first state. The second compensation control unit generates a second compensation signal for injection into the fundamental command to balance neutral point voltage when the converter is in operation in a second state. The switch control unit detects first and second states of the converter and provides first and second switch signals respectively. The switch implementation unit switches the fundamental control unit to communicate with the first and second compensation control units according to the first and second switch signals respectively.

Abstract translation: 控制系统包括基本控制单元，第一和第二补偿控制单元，开关控制单元和开关实施单元。 基本控制单元产生用于实现转换器的基本功率转换操作的基本命令。 第一补偿控制单元在转换器在第一状态下运行时产生用于注入基本命令的第一补偿信号以平衡中性点电压。 第二补偿控制单元在转换器在第二状态下运行时产生用于注入基本命令的第二补偿信号以平衡中性点电压。 开关控制单元检测转换器的第一和第二状态，分别提供第一和第二开关信号。 开关实施单元切换基本控制单元，以分别根据第一和第二开关信号与第一和第二补偿控制单元通信。