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Multi-time scale flexible load rolling scheduling method and system based on model predictive control

A model predictive control, multi-time scale technology, applied in the direction of AC network circuits, electrical components, single-network parallel feeding arrangements, etc., can solve problems such as inability to adapt to power grid dispatching requirements, increase in solution errors, etc., and achieve optimal closed-loop control performance , Reduce the deviation caused by prediction error and system interference, reduce the complexity and the effect of calculation

Active Publication Date: 2019-08-16
HOHAI UNIV
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Problems solved by technology

With the continuous increase of renewable energy in the grid, the solution error of the existing open-loop method is increasing, which cannot meet the needs of grid dispatching

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  • Multi-time scale flexible load rolling scheduling method and system based on model predictive control
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  • Multi-time scale flexible load rolling scheduling method and system based on model predictive control

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0045] (1) Establish a flexible load response model, and model each flexible load adjustable resource at time k. The type i flexible load aggregation model can be described by the following flexible load model:

[0046] x(k+1)=Ax(k)+Bu(k) (1),

[0047] Among them, x(k) is the flexible load state variable at the current moment, x(k+1) is the flexible load state variable at the next moment, u(k) is the system control variable, and A and B are coefficient matrices.

[0048] (2) Considering the differences in the response characteristics of different types of flexible loads interacting with the power grid, the present invention proposes a multi-time scale flexible load rolling dispatching model, w...

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Abstract

The invention discloses a multi-time scale flexible load rolling scheduling method and system based on model predictive control. The method is characterized by comprehensively considering the difference of scheduling parameters and a system real-time running state of the system from the scheduling time scale; establishing a day-ahead / intra-day rolling scheduling model in consideration of a flexible load multi-time scale response characteristic; and based on a model predictive control method, providing a method of solving the day-ahead rolling scheduling model based on decomposition-coordination hierarchical model predictive control, and a method of solving the intra-day rolling scheduling model based on dynamic rolling optimized model predictive control to obtain the optimal output of theflexible load at each moment. The method comprehensively considers the peak shaving of the power system, the consumption of renewable energy and the balance of renewable energy output fluctuation, establishes the multi-time scale, multi-objective and multi-objective coordination flexible load rolling scheduling model, and realizes multi-objective optimal scheduling and coordinated control of the flexible load.

Description

technical field [0001] The invention belongs to the field of power system operation and control, and in particular relates to a multi-time scale flexible load rolling scheduling method and system based on model predictive control. Background technique [0002] Flexible loads are diverse, time-varying, and uncertain. In the object dimension, different flexible loads have different adjustable potentials in the power system dispatching operation, and there are differences in dispatching costs among various flexible loads; in the time dimension, different On the time scale of power system dispatching, the dispatching priority and response characteristics of flexible loads are also different, which brings difficulties to the optimal dispatching and solution of flexible loads. [0003] Existing power system scheduling mostly adopts the refined time scale method, and the open-loop optimal control is performed based on a time section or a time scale to achieve optimal control at a c...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/48
CPCH02J3/00H02J3/48H02J2203/20
Inventor 林克曼吴峰史林军
Owner HOHAI UNIV
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