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Emulation of control to voltage source converter using synchronous machine

A technology of voltage source converter and synchronous machine, which is applied in the direction of motor generator control, generator control components, electronic commutation motor control, etc., and can solve problems such as not helping grid voltage control

Inactive Publication Date: 2011-07-20
ABB TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inverter does not contribute to the voltage control of the grid

Method used

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  • Emulation of control to voltage source converter using synchronous machine
  • Emulation of control to voltage source converter using synchronous machine
  • Emulation of control to voltage source converter using synchronous machine

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Embodiment Construction

[0033] In the following, a detailed description will be given of preferred embodiments of the method and apparatus according to the present invention.

[0034] The invention may be provided in systems to be connected to an electric power or utility grid via a voltage source converter (VSC). Such systems include systems for direct or alternating current power generation and delivery, ie, high voltage or extra high voltage power delivery and generation systems.

[0035] When a voltage source converter is connected to a utility grid or grid, it may be desirable to have the converter contribute to the control of the grid. The present invention is directed to enabling a voltage source converter to make such a contribution.

[0036] exist figure 1 , a single line diagram of an exemplary power transmission system is schematically shown in the form of a high voltage direct current (HVDC) system, ie a high voltage (above 50 kV) or extra high voltage (above 400 kV) power transmission ...

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PUM

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Abstract

The invention concerns a method, device and computer program product for controlling a voltage source converter (16; 20) connected to a power grid (12; 24). The device (25; 26) includes a first input for receiving at least one detected electrical property (E, i) of an interface between the grid and the voltage source converter, and a control entity (27; 28) arranged to control the voltage source converter (16; 20) through using a control signal (vREF, TR) obtained through using a mapping of an electrical model of a non-salient synchronous machine onto an electrical model of the voltage source converter and through applying the detected electrical property of the interface between the grid and the voltage source converter in said mapped model, wherein the electrical model of the non-salient synchronous machine reflects the electrical dynamics of this synchronous machine.

Description

technical field [0001] The present invention generally relates to voltage source converters. The invention is particularly directed to a method, a device and a computer program product for controlling a voltage source converter connected to a grid. Background technique [0002] The number of voltage source converters (VSCs) connected to the average utility grid is steadily increasing. Applications include high-voltage direct current (HVDC) transmission, static synchronous compensators (STATCOMs), back-to-back motor drives, distributed power generation, and wind turbine generators. [0003] In some situations, especially when the rated power capacity is high, ie in the MVA range, it may be desirable for a voltage source converter to contribute to the voltage control of the grid. A voltage source converter should therefore control the magnitude of the grid voltage at the bus to which it is connected. This is especially true for the basic purpose of STATCOM and the VSC-HVDC ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/02H02P9/10H02P21/00G01R31/3183
CPCH02J3/34Y02E40/34H02J3/36Y02E60/60H02M7/797H02P9/02H02J3/38H02J3/16H02M7/48
Inventor 伦纳特·哈内福什
Owner ABB TECH AG
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