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Event trigger load frequency control-based method of multi-zone interconnected power system

A technology of load frequency control and power system, applied in the field of power system

Inactive Publication Date: 2017-02-01
CHONGQING UNIV
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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to propose a method for triggering load frequency control based on events in multi-area interconnected power systems for the field of power interconnection systems that has not yet effectively solved the problems of sliding mode controller design and power system load frequency control

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  • Event trigger load frequency control-based method of multi-zone interconnected power system
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  • Event trigger load frequency control-based method of multi-zone interconnected power system

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Embodiment Construction

[0049] The present invention will be further described below with reference to the drawings and embodiments.

[0050] The method for triggering load frequency control based on events in a multi-area interconnected power system of this embodiment includes the following steps:

[0051] Step 1: Establish a mathematical model for load frequency control of multi-energy power systems;

[0052] The dynamic model of the multi-region power system is:

[0053] x · i ( t ) = A i x i ( t ) + B i u i ( t ) + F i ω i ( t ) y i ( t ) = C i x i ( t ) , ,

[0054] among them:

[0055] ω i T ( t ) = [ υ 1 i υ 2 i ] = ΔP d i X i = 1 , j ≠ i N T i j Δf i ,

[0056] y i (t)=ACE i =ΔP tie-i +β i Δf i ,

[0057] F i = - 1 M i ...

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Abstract

The invention discloses an event trigger load frequency control-based method of a multi-zone interconnected power system. The method comprises the steps of (1) building a mathematical model for load frequency control of a multi-energy power system; (2) researching an even trigger condition design of the load frequency control of the multi-zone interconnected power system on the basis of an event trigger mechanism; and (3) designing an event trigger-based controller. The system directly enters a sliding mode state from the beginning and a sliding mode exists in the overall control system; and for a sliding mode control system, after the system enters the sliding mode state, the dynamic property of the system is completely determined by the sliding mode state. The control method has the desired dynamic characteristic and has complete robustness on change of system parameters and external disturbance; and buffeting is eliminated. Due to use of the event trigger mechanism, the multi-energy power system can effectively inhibit dynamic frequency deviation and dynamic deviation of tie-line power and effectively reduce the network bandwidth occupancy.

Description

Technical field [0001] The present invention relates to the technical field of power systems, and in particular to a method for controlling multi-zone load frequency. Background technique [0002] Power system load frequency control (LFC) is an important control method to ensure the quality of power supply and the safe, reliable and economic operation of the power system. One of the main needs of the interconnected power system LFC is to ensure satisfactory regional frequency and tie-line switching power. The deviation of regional frequency and tie-line switching power is caused by unforeseen load changes and imbalances between load demands. Although LFC methods based on various classical linear control theories and advanced control theories have been proposed, due to the inherent characteristics of varying loads, as well as the uncertain model parameters and continuous changes in the operating environment in the actual power system, a fixed controller is designed to Solving the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/24
CPCH02J3/00H02J3/24H02J2203/20
Inventor 苏晓杰刘鑫鑫宋永端王磊
Owner CHONGQING UNIV
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