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A Parallel Control System of Voltage Source Inverters

A voltage source inverter and control system technology, applied in the electric power field, can solve the problems of poor stability, inverter reliability and stability, etc., and achieve the effects of improved reliability, good dynamic response, and reduced volume and weight

Active Publication Date: 2017-04-19
STATE GRID CORP OF CHINA +4
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the reliability and stability of the current inverter are not high, especially when switching

Method used

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  • A Parallel Control System of Voltage Source Inverters
  • A Parallel Control System of Voltage Source Inverters
  • A Parallel Control System of Voltage Source Inverters

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Embodiment Construction

[0039] 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 creative efforts fall within the protection scope of the present invention.

[0040] figure 1 It is a system block diagram of an embodiment of the voltage source inverter parallel control system provided by the present invention, including several parallel voltage source inverter modules 101, and each of the voltage source inverter modules 101 includes sequentially connected voltage sources u in, a three-phase inverter main circuit and an LC filter circuit, the voltage source inverter module 101 is also connected to a load with a switch S, ...

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Abstract

The invention discloses a voltage source inverter parallel control system. The voltage source inverter parallel control system comprises a plurality of voltage source inverter modules connected in parallel; each voltage source inverter module comprises a voltage source, a three-phase inverter main circuit and an LC filter circuit which are connected sequentially; the voltage source inverter modules are further connected to a load with a switch; the system further comprises a current acquiring module, a first voltage acquiring module, a second voltage acquiring module, a reference signal computing module, a phase synchronizing module and a voltage reference signal generating module, as well as a control module used for controlling the switch of the three-phase inverter according to the voltage reference signal, filter inductive current, and a pulse control signal generated according to voltage and carrier voltage output by the voltage source inverter modules. The voltage source inverter parallel control system has higher stability and reliability.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a voltage source inverter parallel control system. Background technique [0002] With the rapid development of the national economy, people's demand for electricity is increasing, and the scale of the power grid and the capacity of long-distance transmission of electricity are constantly increasing. At this time, the defects of high cost, difficult operation, and low reliability of the centralized large power grid will become increasingly prominent with the expansion of the scale of the power grid, and it will be increasingly unable to meet people's requirements for the quality of power supply and the safety and reliability of power consumption. . In recent years, large-scale power outages caused by single-point faults in the power grid have occurred frequently, fully exposing the vulnerability of the large power grid system, and the reliability of power supply has attra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
Inventor 王伟韦徽王彤宋飞茹心芹
Owner STATE GRID CORP OF CHINA
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