Wind power plant active power control method based on model prediction control

A model predictive control, active power technology, applied in wind power generation, single grid parallel feeding arrangement, etc., can solve problems such as poor power tracking effect, neglect of unit response time, improper power distribution, etc.

Inactive Publication Date: 2017-05-31
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, if the differences between units are not considered, resulting in improper power distribution, it will inevitably lead to poor tracking effect of total active power
And the current research ignor

Method used

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  • Wind power plant active power control method based on model prediction control
  • Wind power plant active power control method based on model prediction control
  • Wind power plant active power control method based on model prediction control

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[0082] figure 1 It is a system block diagram of a wind farm active power control method based on model predictive control.

[0083] In this example, if figure 1 As shown, the system architecture of the wind farm active power control method based on model predictive control in the present invention mainly includes: 1. Distribution of active power reference values ​​at the wind farm level; 2. Reference value revision based on model predictive control; Correction value assignment. The three parts are described in detail below.

[0084] 1. Distribution of wind farm-level active power reference values

[0085] The distribution of active power reference value at wind farm level is based on the premise of unit classification. Because even in a very small wind farm, due to geographical location and other factors, the wind speeds suffered by each wind turbine cannot be exactly the same. Wind turbines are classified into several subcategories, but in general can be divided into thr...

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Abstract

The invention discloses a wind power plant active power control method based on model prediction control. Wind turbine generators are classified according to the wind speeds of the wind turbine generators, a local linearization state-space model of each type of generators is established by adopting an equivalent modeling method, dynamic response characteristics of different types of generators are taken into account based on a designed model prediction controller, power grid dispatching values are distributed to each type of generators according to certain priority, then active reference values obtained by each type of generators are revised by the model prediction controller, and revision values are distributed to all the generators in proportion. For the goal of wind power plant active power control, the operational difference among the generators is taken into account, and the power grid dispatching value can be quickly tracked based on the model prediction control.

Description

technical field [0001] The invention belongs to the technical field of wind farm active power control, and more specifically relates to a wind farm active power control method based on model predictive control. Background technique [0002] As the most important form of renewable energy utilization, wind power has developed rapidly. The traditional wind farm control method is an autonomous active power control method, which allows each fan in the wind farm to generate electricity as much as possible according to the change of wind energy. With the gradual increase of wind power penetration, the fluctuation of active power of wind farms caused by the uncertainty of wind energy has brought great challenges to the safe operation of power grids. The controllable operation of wind farms will gradually become the development trend of grid-connected operation of large wind farms. The key technology for the controllable operation of wind farms is the active power control of wind fa...

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Application Information

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IPC IPC(8): H02J3/48
CPCH02J3/48Y02E10/76
Inventor 邹见效彭超刘淼徐红兵何健
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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