Active stability control method of water-turbine generator set

A technology of generator set, control method, applied in the direction of hydroelectric power generation, engine components, machines/engines, etc.

Inactive Publication Date: 2010-06-02
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Despite this divergence in the use of governors to improve power sy

Method used

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  • Active stability control method of water-turbine generator set
  • Active stability control method of water-turbine generator set
  • Active stability control method of water-turbine generator set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0092] This embodiment is a simulation example of the stabilization control of a hydroelectric generator set in a hydropower station.

[0093] Power station unit characteristic parameters: A t =1.127; T w =2.242s; T y =0.5s; T j =8.999s; T d0 '=5.4s; X d =1.07;X d '=0.34; X q =0.66;X f =1.29;X ad =0.97; set these parameters into the controller as the basic calculation parameters of the controller.

[0094] Choose a typical unit control structure for simulation comparison, the governor part adopts typical parallel PID control, K p =5.0;K I = 3.5; K D =1.5; Excitation system adopts PI, K pe = 1.0; K Ie = 1.5. The speed governor works in power regulation mode, and the excitation regulator works in constant reactive power mode. Use the simulation method to determine the controller parameters: T tout =0.4s; T Efout = 0.2s; k c =0.1,k t = 0.1.

[0095] (1) Example of active power regulation

[0096] The unit adjusts the active power, the active power increases f...

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Abstract

The invention relates to an active stability control method of a water-turbine generator set, which comprises the following steps: calculating the stability control value of the water-turbine generator set under the given output by using a Hamiltonian model of the water-turbine generator set, determining the limiting conditions of the stability control value, improving a stability control algorithm, and then, determining the constitution scheme of an actual controller. The method of the invention improves the stability of an electric power system by the active stability of the set, avoids the influence of the complexity of the electric power system on the design of a set controller, and simplifies the design process; in the stability control method a given output target value is used as a control basis to reduce the coupling action between the set and the electric power system, and the output deviation is used as feedback compensation to solve the problem of output deviation caused by the model error of the stability controller; and the stability controller can keep the operation stability of the set in case of lower damping.

Description

technical field [0001] The invention relates to an active stability control method for a hydraulic turbine generator set, in particular to a method for controlling a hydraulic turbine governor and a generator excitation controller, and belongs to the technical field of hydraulic turbine generator set control. 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. As a power point, the stability of the unit plays an important role in the oscillation of the power system. After the unit is disturbed, the oscillation should be calmed down as soon as possible to ensure that the unit ...

Claims

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Application Information

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IPC IPC(8): F03B15/00
CPCY02E10/226Y02E10/20
Inventor 曾云张立翔武亮王文全闫妍李泽姚激
Owner KUNMING UNIV OF SCI & TECH
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