Multi-machine infinite power system dynamic area division sliding mode controller with SVC

A technology of electromechanical power system and power system, applied in the field of dynamic area integral sliding mode controller of multi-machine infinite power system, which can solve problems such as differential explosion, high sensitivity to parameter changes, and complex control

Active Publication Date: 2020-11-20
NORTHEAST DIANLI UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

The feedback linearization control method is highly sensitive to parameter changes; the inversion control method has a "differential explosion" problem, which makes the control more complicated

Method used

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  • Multi-machine infinite power system dynamic area division sliding mode controller with SVC
  • Multi-machine infinite power system dynamic area division sliding mode controller with SVC
  • Multi-machine infinite power system dynamic area division sliding mode controller with SVC

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Embodiment Construction

[0157] The present invention will be further described below in conjunction with accompanying drawing:

[0158] The implementation steps of the dynamic area integral sliding mode controller for multi-machine infinite power system with SVC are as follows:

[0159] Step 1) Model the multi-machine infinite power system with SVC.

[0160] The present invention takes the third-order practical model of the synchronous generator as the research object, and the nonlinear differential equation of the i generator is as shown in formula (1):

[0161]

[0162] The electrical equation of the system is:

[0163]

[0164] The model of SVC is shown in formula (3):

[0165]

[0166] where E qi is the orthogonal axis electromotive force of the i-th generator, p.u.; E qj is the orthogonal axis electromotive force of the jth generator, p.u.; δ i is the power angle of the i-th generator, rad; ω i is the relative speed of generator i, rad / s; ω j is the relative speed of generator j,...

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Abstract

The invention discloses a multi-machine infinite power system dynamic area division sliding mode controller with SVC. The implementation of the controller comprises the following steps: 1) modeling for a multi-machine infinite power system with SVC; 2) under a condition that an actuator fails, establishing a multi-machine system model containing a failure fault; 3) adopting an RBF neural network to approach an unknown function in the system model; and 4) combining a dynamic surface controller design method with an integral sliding mode, and designing the self-adaptive controller of the multi-machine power system with the SVC. In the invention, on the basis of parameter uncertainty and external disturbance of a multi-machine power system, a failure fault condition of the actuator is considered; and an adaptive fault-tolerant control method is adopted to finally form a dynamic area division sliding mode coordination controller of SVC and generator excitation, convergence of a state tracking error to zero in finite time is realized, an anti-interference capability, a convergence speed and tracking precision of the system are improved, and all signals of the whole control system are ensured to be semi-globally consistent and finally bounded.

Description

technical field [0001] The invention relates to the field of power system control, in particular to a multi-machine infinite power system dynamic area integral sliding mode controller with SVC. Background technique [0002] Modern power systems have the characteristics of large power grids, large units, long-distance power transmission, and highly automatic control, which pose great challenges to the stable operation of power systems. Generator excitation control plays an important role in improving the stable operation of power systems. In the actual power grid operation, the system is more complicated and cannot be simply equated with a single-machine system, and the interaction between multiple generators needs to be considered. A generator failure may affect the operation status of other generators, thus affecting the stable operation of the entire power system. Therefore, the design of multi-machine excitation controller becomes the focus of research. Static var comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/18H02J3/46H02P9/14H02P103/20
CPCH02J3/00H02J3/1821H02J3/466H02P9/14H02J2203/20H02J2203/10H02P2103/20Y02E40/10
Inventor 祝国强吉爽张秀宇彭雅轩孙灵芳李静李志伟
Owner NORTHEAST DIANLI UNIVERSITY
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