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Damping injection control method for improving power angle oscillation of water turbine generator set

A technology of generating sets and control methods, applied in hydroelectric power generation, engine components, machines/engines, etc., which can solve the problems of not fully utilizing the internal parameter association mechanism

Inactive Publication Date: 2010-12-15
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

However, the internal parameter association mechanism provided by the Hamiltonian model has not been fully utilized in the study
The main reason is that the control design to improve system performance by controlling injection damping is in its infancy in theory and method, and some current applications can only deal with simple systems below the third order

Method used

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  • Damping injection control method for improving power angle oscillation of water turbine generator set
  • Damping injection control method for improving power angle oscillation of water turbine generator set
  • Damping injection control method for improving power angle oscillation of water turbine generator set

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the examples.

[0036] Step 1: Modify the power angle correlation factor of the damping matrix of the Hamiltonian model of the generator set, and design the equivalent control law β 1 (x) and β 2 (x), and according to its applicability, it constitutes a variable structure control strategy with traditional speed regulation and excitation PID control.

[0037] In the present invention, in order to increase the damping of the power angle of the unit, the self-correlation factor of the power angle is added to the damping matrix of the Hamiltonian model of the hydroelectric generator set, and then the change of the structure is equivalent by designing a control law. In order to determine the applicable conditions of the control method of the present invention, analysis has been carried out in the following three aspects:

[0038] 1. Modify the correlation factor R of the damping matrix δ

[0039] T...

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Abstract

The invention relates to a damping injection control method for improving power angle oscillation of a water turbine generator set. An autocorrelation factor of the unit power angle is increased based on the structural analysis of a Hamilton model damping matrix of the water turbine generator set, namely the power angle damping is injected based on a dynamical mechanism associated inside the system, and the structural change is equivalent by designing a corresponding control law. Due to the applicability analysis of the equivalent control law, a variable structure control strategy by combining the algorithm and a traditional PID control algorithm is provided so as to control the machine set, and corresponding solutions are provided for the control of output phase step and other problems. The simulation proves that: the provided control algorithm can effectively improve the oscillating characteristics of the power angle of the machine set, even can keep the stability of the machine set under lower damping.

Description

technical field [0001] The invention relates to the technical field of hydroelectric generating set control, in particular to a damping injection control method for improving power angle oscillation of a hydroelectric generating set. Background technique [0002] The weak damping problem existing in the long-distance networking of large hydroelectric generating units is an important factor affecting the stability of the power grid. Although the research and application of PSS and grid-side FACTS equipment provide an effective way to solve this problem. However, due to the complexity of the grid side, there are some difficulties in both theoretical analysis and practical application. Therefore, taking effective measures on the unit side to improve the stability of the weakly damped power system has always been a hot research topic. [0003] From the perspective of unit parameter oscillation characteristics, the power angle of the generator can reflect its mechanical and ele...

Claims

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Application Information

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IPC IPC(8): F03B15/00H02J3/38
CPCY02E10/226Y02A30/60Y02E10/20
Inventor 曾云张立翔姚激徐天茂武亮王文全闫妍李泽
Owner KUNMING UNIV OF SCI & TECH
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