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Dynamic Area Integral Sliding Mode Controller for Multimachine Infinite Power System with SVC

A technology of electromechanical power system and power system, which is applied in the field of dynamic area fractional sliding mode controller of multi-machine infinite power system, can solve problems such as differential explosion, high sensitivity to parameter change, complex control, etc. Simple, improve the effect of anti-interference ability

Active Publication Date: 2022-03-15
NORTHEAST DIANLI UNIVERSITY
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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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  • Dynamic Area Integral Sliding Mode Controller for Multimachine Infinite Power System with SVC
  • Dynamic Area Integral Sliding Mode Controller for Multimachine Infinite Power System with SVC
  • Dynamic Area Integral Sliding Mode Controller for Multimachine Infinite Power System with SVC

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Embodiment Construction

[0155] The present invention will be further described below in conjunction with accompanying drawing:

[0156] The implementation steps of the dynamic area integral sliding mode controller for multi-machine infinite power system with SVC are as follows:

[0157] Step 1) Modeling a multi-machine infinite power system with SVC;

[0158] 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):

[0159]

[0160] The electrical equation of the system is:

[0161]

[0162] The model of SVC is shown in formula (3):

[0163]

[0164] 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 fractional sliding mode controller with SVC. The realization of the controller includes the following steps: 1) modeling the multi-machine infinite power system with SVC; 2) in the In the case of actuator failure, a multi-machine system model with failure faults is established; 3) RBF neural network is used to approximate the unknown function in the system model; 4) The dynamic surface controller design method is combined with the integral sliding mode to design a system with SVC. Adaptive controllers for multi-machine power systems. Based on the uncertainty of the parameters of the multi-machine power system and external disturbances, the present invention adopts the self-adaptive fault-tolerant control method considering the failure of the actuator, and finally forms the dynamic area-division sliding mode coordinated controller of the excitation of the SVC and the generator, and realizes the state The tracking error converges to zero within a limited time, which improves the system's anti-interference ability, convergence speed and tracking accuracy, and ensures that all signals in the entire control system are semi-globally consistent and ultimately 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 Patents(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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