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Control method of reverse system

A control method and inverter system technology, applied in the field of power electronics, can solve the problems of complex process, low efficiency, and failure of the increased system.

Inactive Publication Date: 2007-11-28
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, in the three-phase four-wire inverter power supply system, the commonly used scheme of adding a transformer is bulky, complex in process, and low in efficiency, and due to the existence of transformer leakage inductance, the symmetry of the output voltage cannot be guaranteed; and three A half-bridge structure, when the load is seriously unbalanced, the capacitor connected to the center point bears a large current, which increases the possibility of system failure

Method used

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  • Control method of reverse system
  • Control method of reverse system
  • Control method of reverse system

Examples

Experimental program
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Embodiment

[0083] Example: Inverter system of micro gas turbine generator set

[0084] The electric energy generated by the micro gas turbine can be processed to form direct current, and the direct current needs to be inverted to form three-phase four-wire alternating current for users.

[0085] The invention is an inverter control system and method, which can fulfill this function well in response to this requirement. The system consists of a power conversion circuit and a control system. Fig. 1 shows the schematic diagram of the system system of the present invention. The power conversion circuit is composed of a power inverter circuit and a power filter circuit; the control system includes a central control module, a multi-channel data detection and acquisition module, a hierarchical communication module, a multi-channel power drive module and a hierarchical alarm module.

[0086] Each module in the control system is embedded with control software, among which:

[0087] The multi-c...

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Abstract

The invention discloses a controlling method of contravariant system, which comprises the following parts: central control mode, multi-path data detecting and gathering mode, grading communicating mode, multi-path power driving mode and grading alarming mode, wherein the control software is inserted in each mode of the control system; the measuring disposing subprogram is inserted in the multi-path data detecting and gathering mode; the central control mode is inserted with detecting and judging subprogram before operating, operating and stopping control subprogram, inverter one-phase control subprogram, inverter fourth bridge arm control subprogram; the narrow pulse limit subprogram is inserted in the multi-path power driving mode; the danger alarming breaking disposing subprogram, one and two-grade alarming subprograms, current, voltage and DC bus voltage alarming subprogram, one-grade alarming software breaking subprogram are inserted in the multi-stage alarming managing mode; the communicating program is inserted in the grading communicating managing mode. The invention has real-time property, stability, versatility to simplify the complexity of control system, which affirms the property of system.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a control method of an inverter system. Background technique [0002] In recent years, with the construction of the second-generation energy system, the cogeneration system of heat, electricity and cooling composed of micro gas turbine generator sets has been actively promoted and applied internationally. The inverter system (converting direct current to alternating current) has received widespread attention as a guarantee of the final output power quality of the micro-turbine power generation system and the inverter system for power supply. [0003] At present, in the three-phase four-wire inverter power supply system, the commonly used scheme of adding a transformer is bulky, complex in process, and low in efficiency, and due to the existence of transformer leakage inductance, the symmetry of the output voltage cannot be guaranteed; and three A half-bridg...

Claims

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Application Information

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IPC IPC(8): H02M7/48
Inventor 张化光闫士杰刘秀翀陈宏志边春元王川
Owner NORTHEASTERN UNIV
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