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Parameter tuning method of PID controller for speed regulating system to improve the dynamic response characteristics of primary frequency modulation

A technology of speed regulation system and parameter tuning, which is applied in the direction of reducing/preventing power oscillation, AC network circuit, single-network parallel feeding arrangement, etc., can solve the problems of complex state space equation solution of the whole system, and it is difficult to consider the interaction of power plants, etc. Achieve the effect of ensuring the dynamic response characteristics of primary frequency modulation and ensuring stability

Inactive Publication Date: 2018-12-28
JIANGSU ELECTRIC POWER CO +2
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Problems solved by technology

[0005] However, the solution of the state-space equation of the whole system is complicated, and it usually needs to face the problem of dimensionality disaster in large systems. The application of traditional methods such as the critical parameter method is limited to the single-unit system model, and it is difficult to consider the interaction between various power plants

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  • Parameter tuning method of PID controller for speed regulating system to improve the dynamic response characteristics of primary frequency modulation
  • Parameter tuning method of PID controller for speed regulating system to improve the dynamic response characteristics of primary frequency modulation
  • Parameter tuning method of PID controller for speed regulating system to improve the dynamic response characteristics of primary frequency modulation

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[0041] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] The hydraulic governor system consists of prime mover, servo system and controller, figure 1 The commonly used model of the speed control system of the water turbine unit is given in , in figure 1 Medium, K P is the proportional gain, K I is the integral gain, K D is the differential gain, b P is the permanent velocity droop, s is the Laplace operator, T G is a constant of the servo system, T w is the water hammer time constant. A steam turbine governor model such as figure 2 As shown, the model is based on the IEEEG1 model, in figure 2 where K is the reciprocal of the permanent velocity droop coefficient, T a , T b , T c , T CH , T RH and T CO is the time constant, F HP , F IP and F LP Respectively represent the mechanical propo...

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Abstract

The invention discloses a parameter tuning method of a PID controller for a speed regulating system to improve the dynamic response characteristics of primary frequency modulation. A mathematical model of primary frequency modulation of a multi-machine system is established according to that frequency response characteristic of the system in the primary frequency modulation process; based on the classical control theory, a sufficient condition for judging the stability of primary frequency modulation process is given by using the relationship between the eigenequation of primary frequency modulation closed loop of single machine system and that of multi machine system, and a method for tuning the parameters of PID controller by using the sufficient condition is proposed. The method of theinvention comprehensively considers the coupling relationship between each unit in the primary frequency modulation process, has strong adaptability to various operation modes of the system, is easy to be operated in engineering practice, can effectively avoid the ultra-low frequency oscillation problem in the area with a high proportion of hydroelectric units, and improves the dynamic response characteristics of the primary frequency modulation.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a parameter setting method of a PID (proportional-integral-differential) controller of a speed regulation system for improving the dynamic response characteristics of primary frequency regulation. Background technique [0002] With the increase in the proportion of clean energy and the decline in the proportion of thermal power, the stability of the power system is declining. This is because wind turbines and photovoltaic power plants cannot provide inertial support for the power system; the stability of the speed control system of hydropower stations is poor. Regions with a high proportion of hydropower, such as Sichuan and Sichuan, have experienced ultra-low-frequency oscillations; after large-scale clean energy is connected to the grid, the dynamic response characteristics of primary frequency modulation are difficult to meet the requirements. This is...

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Application Information

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IPC IPC(8): H02J3/38H02J3/24
CPCH02J3/24H02J3/38H02J2203/20
Inventor 程亮汪惟源徐政王国腾王荃荃张群周挺孙文涛
Owner JIANGSU ELECTRIC POWER CO
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