Load-frequency control method for interconnection nonlinear power system

A load frequency control and power system technology, applied in the direction of power transmission AC network, circuit device, AC network circuit, etc., can solve the problems of long response time and overshoot, and achieve the effect of reducing overshoot and response time

Inactive Publication Date: 2018-10-23
GUANGDONG UNIV OF TECH
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Problems solved by technology

However, although these traditional sliding mode control methods can achieve the purpose of controlling each controlled variable, their response time and overshoot are relatively long.

Method used

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  • Load-frequency control method for interconnection nonlinear power system
  • Load-frequency control method for interconnection nonlinear power system
  • Load-frequency control method for interconnection nonlinear power system

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Embodiment Construction

[0029] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0031] see figure 1 with figure 2 As shown, this embodiment provides a load frequency control method for an interconnected nonlinear power system.

[0032]...

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Abstract

The invention discloses a load-frequency control method for an interconnection nonlinear power system, and the invention is based on the improvement of a conventional super-twisting algorithm, and proposes a variable-gain super-twisting algorithm and a quasi-super-twisting algorithm. The method comprises the steps: designing sliding mode planes according to a sliding mode formula, wherein each sliding mode plane contains the first-order, second-order and third-order frequency differences; substituting the frequency differences into the sliding mode planes to obtain the sliding mode planes comprising the frequency differences or frequency difference derivatives; carrying out the derivation of the sliding mode planes, supposing that the first-order derivatives of the first mode planes is equal to a value of one of the expressions shown in the descriptions, and carrying out the comparison with a super-twisting algorithm. Therefore, the response time is remarkably reduced, and the overshoot quantity is reduced, thereby highlighting the superiority of the two new methods.

Description

technical field [0001] The invention relates to the technical field of interconnected nonlinear power systems, in particular to a load frequency control method for interconnected nonlinear power systems. Background technique [0002] With the increase of electricity consumption year by year, people put forward higher and higher requirements for the stability and quality of electricity consumption. The amount of electricity used and generated in a power system must match, and if they don't match, the frequency will change. Frequency disturbance will damage the equipment and affect the service life of the equipment. In severe cases, it may cause large-scale power outages. Therefore, the load frequency control of power system becomes very necessary and important. [0003] The previous models of power system load frequency control are all based on linear models, even including nonlinear models, there is only one. However, in practical systems, the power system is an interconn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/34
CPCH02J3/34H02J2203/20
Inventor 鲁仁全郭建平李鸿一周琪吴元清
Owner GUANGDONG UNIV OF TECH
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