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System and method for generating an inertial response to a change in the voltage of an electricial grid

A technology of inertial response and grid voltage, applied in control systems, wind power generation, electrical components, etc., can solve problems such as power system stability and reliability reduction

Active Publication Date: 2014-04-09
VESTAS WIND SYST AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, as wind power becomes more prevalent, faster and greater grid frequency changes can be expected, leading to an associated decrease in overall power system stability and reliability

Method used

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  • System and method for generating an inertial response to a change in the voltage of an electricial grid
  • System and method for generating an inertial response to a change in the voltage of an electricial grid
  • System and method for generating an inertial response to a change in the voltage of an electricial grid

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Embodiment Construction

[0027] Embodiments of the present invention generally relate to wind turbine power generation systems and other power sources that rely on voltage conversion to transmit power to the grid. In order to improve the influence of the wind turbine power system on the stability of the grid, the integrated inertial response is determined and provided to the voltage conversion controller. Under steady-state conditions, the value of the inertial response can be zero, so that the voltage conversion controller works in a conventional manner, thereby transmitting the maximum wind power to the grid. The integrated inertial response value changes to a non-zero value in response to the grid voltage fluctuation, which will cause the output of the inertial response controller to generate the inertial response reference signal. The inertial response reference signal enables the power output controller to adjust the output power of the wind turbine system against fluctuations in the grid voltage....

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Abstract

Systems, methods, and computer program products for providing an inertial response by a wind power system to power fluctuations in an electrical grid. The system includes a synthetic inertial response generator configured to generate a power offset in response to fluctuations in grid voltage. The power offset signal is generated by determining a quadrature component the grid voltage using an internal reference voltage having an angular frequency and phase angle that is synchronized to the electrical grid by a control loop. The quadrature component is used to determine a synchronous power level. A control loop error signal is produced by the difference between the synchronous power level and the wind turbine system power output. Changes in the grid frequency produce an error signal that is added to the power set point of wind turbine system output controllers to provide a power system inertial power output response.

Description

Technical field [0001] The present application generally relates to power generation systems, and more specifically, to systems, methods, and computer program products for providing inertial responses from wind power systems to changes in grid voltage. Background technique [0002] An alternating current (AC) power grid generally includes a network composed of synchronous machines, which are coupled through a transmission line network, and the transmission line transmits the power generated by the synchronous machines to multiple customers. Synchronous machines of the type commonly used to generate electricity in a power grid include movable magnetic elements or rotors and several fixed conductive coils including stators. To generate electricity, the rotor is coupled to a rotating power source called a prime mover, and the stator is coupled to the load. When the prime mover applies torque to the rotor, it will cause the rotor to rotate relative to the stator, thereby providing p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/386Y02E10/763H02J3/24Y02E10/723H02P9/105F03D7/0272F03D7/0284H02J2300/28H02J3/381Y02E10/76Y02E10/72H02J3/241H02J3/44
Inventor G·C·塔尔诺夫斯基
Owner VESTAS WIND SYST AS
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