Method for automatically adjusting the active power output of wind turbines in wind farms

A technology of active power output and automatic adjustment, applied in wind power generation, parallel feeding arrangement of a single network, etc., can solve the problems such as the lack of detailed demonstration of the additional control of the wide-area communication network, the analysis conditions are not clearly given, and the failure

Active Publication Date: 2015-08-12
贵州中孚科技有限公司
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Problems solved by technology

However, there are still two key issues that have not been well resolved: 1) The analytical conditions for the positive impact of wind farms on power system damping have not been clearly given; Demonstrate the problem that the time delay caused by the wide area communication network may cause the failure of additional controls

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  • Method for automatically adjusting the active power output of wind turbines in wind farms
  • Method for automatically adjusting the active power output of wind turbines in wind farms
  • Method for automatically adjusting the active power output of wind turbines in wind farms

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Embodiment Construction

[0140] Embodiments of the present invention: a method for automatically adjusting the active power output of wind turbines in a wind farm, detecting the frequency of the bus at the converging point in the wind farm, and feeding back the detected data to the input end of the active power comparison link of the control system of each wind turbine, so that the feedback The bus frequency of the converging point is used as an active additional signal, and the original active power setting value is corrected to obtain a new active power setting value. According to the new active power setting value, the active power of each fan is adjusted in real time through the double closed-loop control system. output, so as to realize the automatic synchronous adjustment of the whole wind farm.

[0141] The feedback delay of the bus frequency at the collection point fed back to each wind turbine is required to be less than the calculated value obtained according to formula (C-5),

[0142] ...

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Abstract

The invention discloses a method for automatically regulating active output of draught fans in a wind power plant. The method comprises the steps of detecting bus frequency of convergence points in the wind power plant, feeding detected data back to the input end of an active comparing element of a control system of each draught fan to enable the feedback convergence point bus frequency to serve as an active additional signal, correcting an original active set value to obtain a new active set value, achieving the purpose of regulating the active output of each draught fan in real time through each double closed loop control system according to the new active set value and automatically and synchronously regulating the whole wind power plant. The bus frequency of the convergence points in the wind power plant serves as a basic parameter for correcting the active output of each draught fan, the damping effect on an electrical power system from the wind power plant is effectively improved, the active output of all draught fans can be synchronously adjusted in real time, the method of disconnecting the draught fans is not needed when the active output of the draught fans in the wind power plant fluctuates, and the wind power efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a method for automatically adjusting the active power output of a fan in a wind farm. Background technique [0002] As the scale of wind power continues to increase, the impact of wind power on the synchronous grid is becoming more and more significant. When large-scale wind power bases are centrally connected to the transmission system, the dynamic behavior and stability mechanism of the entire power system can undergo significant changes. One of the important problems is that the damping characteristics of the system may be significantly weakened. In recent years, scholars at home and abroad have carried out research on the damping effect of wind farms on the system and the control of additional damping. [0003] In terms of damping effects, some people have analyzed the impact of wind farms composed of different types of wind turbines with different capacities on system d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCY02E10/76
Inventor 陈卓郝正航
Owner 贵州中孚科技有限公司
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