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A double-layer active power distribution control method for wind farms

A control method and wind farm technology, applied to wind power generation, electrical components, circuit devices, etc., to achieve the effect of enhanced robustness

Active Publication Date: 2019-10-18
NANJING UNIV OF SCI & TECH +1
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  • A double-layer active power distribution control method for wind farms
  • A double-layer active power distribution control method for wind farms
  • A double-layer active power distribution control method for wind farms

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Embodiment

[0039] A wind farm consisting of five 2MW wind turbines with the same configuration information is used as the research object, and the specific parameters are shown in Table 1.

[0040] Table 1. Aerodynamic parameters and mechanical parameters of 2MW direct drive permanent magnet synchronous wind turbine

[0041]

[0042]

[0043] The initial start-stop status of each wind turbine in the wind farm, the predicted wind speed information, and the target power value issued by the grid to the wind farm are shown in Table 2 and Table 3, respectively.

[0044] Table 2. Initial start-stop status and predicted wind speed information of each unit in the wind farm

[0045]

[0046] Table 3. Wind farm target power command

[0047]

[0048] First, build a wind farm active power control system model in MATLAB / Simulink, and set the scheduling cycle to 10 minutes, that is, the simulation time T sim = 60 min. The lower limit of the power of the wind turbines is set at 15% of it...

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Abstract

The invention discloses a wind farm double-layer active distribution control method of considering wind speed fluctuation and prediction errors. The method is characterized in that on basis of an upper layer wind farm global optimization distribution strategy and real-time deviation data between the actual output of the wind farm on a PCC connecting point and a power grid scheduling instruction, active output instructions of various generator units are adjusted and corrected in a real-time manner, and then a wind farm double-layer active distribution control frame is provided. The wind farm double-layer active distribution control method is advantageous in that the wind farm active distribution strategy is completed, and good adaptability is provided under a wind condition of dramatic wind speed changing, and then the wind farm can follow a power generation plan issued by a power grid scheduling center accurately, and therefore the stability of the power generation of the wind farm is improved, and the robustness of the wind farm active control system is enhanced.

Description

technical field [0001] The invention belongs to the field of active power distribution of wind farms, in particular to a double-layer active power distribution control method for wind farms considering wind speed fluctuations and prediction errors. Background technique [0002] The global optimal active power distribution strategy of a single-layer wind farm is based on the wind speed forecast information in the dispatch cycle and the wind farm power generation plan issued by the grid dispatching center, comprehensively considering factors such as unit forecast information, operating status, and control characteristics, through an optimization algorithm Calculate the active output command of each fan in the field within the dispatch period. However, when the wind speed prediction system of the wind farm predicts the wind speed, it usually uses the average wind speed value to predict the wind speed within a period of time, so as to estimate the wind energy. The random variabi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/48H02J3/38
CPCH02J3/386H02J3/48Y02A30/00Y02E10/76
Inventor 殷明慧范颖沈春李志翔李冬运李群刘建坤周前陈兵汪成根卜京谢云云邹云陈哲张宁宇卫鹏
Owner NANJING UNIV OF SCI & TECH
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