PID prediction function-based excitation control method

A technology of excitation control and prediction function, which is applied in the direction of controlling generators through magnetic field changes, and can solve the problems of undiscovered excitation system of synchronous generators, poor real-time performance, and unsuitable excitation control of power systems.

Inactive Publication Date: 2011-03-30
淮安市富脉科技有限公司
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Problems solved by technology

The power system is also difficult to establish an accurate mathematical model, but at the same time it is a fast system. The traditional predictive control has a large amount of online calculation and poor real-time performance, so it is n

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  • PID prediction function-based excitation control method
  • PID prediction function-based excitation control method
  • PID prediction function-based excitation control method

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Embodiment Construction

[0137] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0138] Structured according to the method of the present invention as attached figure 2 The shown predictive function controller includes an ARM microprocessor chip and an analog / digital converter connected with the microprocessor signal, and the ARM microprocessor is solidified with control software compiled according to the method of the present invention. After the microprocessor obtains the current machine terminal voltage of the synchronous generator, it sends the machine terminal voltage to the controller, and the control quantity at the next moment is obtained after the controller calculates, and the microprocessor outputs the control quantity to the amplifying device to drive the automatic voltage regulation The equipment (or power electronic devices such as the drive control circuit of the thyristor) changes the excitation current of the synch...

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Abstract

The invention discloses a proportional-integral-differential (PID) prediction function-based excitation control method, which is used for an excitation control system for a synchronous generator. By combining characteristics of PID and prediction function control, a PID form-based prediction function controlled target function is provided, and the optimized controlled quantity is obtained by optimized calculation, and is taken as a control end input signal of a silicon controlled (or a full-control device) in the excitation control system so as to control the excitation current of the synchronous generator and further influence the terminal voltage thereof. An excitation controller acquired by the method has structural characteristics of proportion, integral and differential in a broad sense, has respective advantages of the PID and the prediction function control, and is convenient to implement. The method overcomes the defects that the conventional prediction control method has high on-line calculated amount and the PID control method has a limited regulating range, and is a novel and effective control strategy for stabilizing a power system.

Description

technical field [0001] The invention relates to an excitation control method, in particular to an excitation control method based on a PID predictive function, which is used in a synchronous generator excitation control system. Background technique [0002] Excitation control of large synchronous generators is one of the most effective and economical means to improve the dynamic quality and transient stability of power systems. In the 1960s, the use of excitation control to improve the stability of the power system made a breakthrough in North America. my country also introduced this technology in 1976. At this stage, the main control methods used are PID (proportional integral differential control), PSS (power system Stabilizer), LOEC (Linear Optimal Excitation Control) and NOEC (Nonlinear Optimal Excitation Control) etc. These methods have achieved certain results in power system stability control to varying degrees, especially the control strategy combining PID and PSS. ...

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Application Information

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IPC IPC(8): H02P9/14
Inventor 郭伟倪加健吴东张颖超钱承山
Owner 淮安市富脉科技有限公司
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