The invention discloses a WAMS-based ultra-low-frequency oscillation monitoring and emergency control method therefor. A WAMS-based ultra-low-frequency oscillation online monitoring method and a modelfor judging whether ultra-low-frequency oscillation occurs or not are given; by performing online judgment on whether a hydroelectric generating set provides negative damping or not, a speed regulator is further controlled in a targeted manner; and by combination with switching of speed regulator networking/isolated network mode, ultra-low-frequency oscillation can be quite down while certain primary frequency modulation capacity is maintained, so that a practical emergency control measure is provided for ultra-low-frequency oscillation control by a power grid dispatching operation staff, andtherefore, the control method is of significant practical meaning to power grid dispatching operation.

WAMS-based ultra-low-frequency oscillation monitoring and emergency control method therefor

The invention provides an optimization control method for a speed regulator in a hydroelectric generating set, and related equipment. The method comprises the steps: building an optimization target function of a target hydroelectric generating set according to a pre-obtained transfer function of the speed regulator in the target hydroelectric generating set and a transfer function of a water turbine; determining a constraint condition of the optimization target function according to a preset threshold value of a damping torque coefficient of the target hydroelectric generating set and a preset value range of a control parameter of the speed regulator; solving an optimization model which is formed by the optimization target function and the constraint condition, obtaining an optimal solution, and determining the control parameter, corresponding to the optimal solution, of the speed regulator as a speed regulator optimization control parameter of the target hydroelectric generating set; and carrying out the optimization control of the speed regulator in the target hydroelectric generating set according to the speed regulator optimization control parameter of the target hydroelectric generating set. The method can achieve the reliable and effective inhibition of the super-low frequency oscillation in the operation of the hydroelectric generating set, and meets the requirements of the operation safety and operation performances of the hydroelectric generating set.

Optimization control method for speed regulator in hydroelectric generating set, and related equipment

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.

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

The invention discloses a PID parameter robust optimization method for a speed regulator with consideration to ultralow frequency oscillation, and the method comprises the steps: formulating a targetfunction according to the transient information reflecting the ultra-low frequency oscillation of a system through combining with the ITAE criterion; fully utilizing various operating conditions considering the existence of the ultra-low frequency oscillation to construct a min-max robust optimization model; finally performing the robust optimization based on a two-stage relaxation algorithm, thereby obtaining the PID parameters which can effectively suppress the ultra-low frequency oscillation of the system under various operating conditions.

PID parameter robust optimization method for speed regulator with consideration to ultralow frequency oscillation

The present invention discloses a hydroelectric generating set speed regulation system PID parameter setting method and device. The method comprises the steps of: employing a preset simulation model to perform simulation of a hydroelectric generating set to determine proportional component magnification times when the hydroelectric generating set reaches a critical stable state and a correspondingvibration period; according to the proportional component magnification times when the hydroelectric generating set reaches the critical stable state and the corresponding vibration period, calculating the proportional component magnification times in the PID parameters and differentiation component magnification times; according to the proportional component magnification times in the PID parameters and the differentiation component magnification times, employing the preset simulation model to perform simulation, and determining integration component magnification times when the hydroelectric generating set reaches the critical stable state as the integration component magnification times in the PID parameter; and according to the proportional component magnification times, the differentiation component magnification times and the integration component magnification times in the PID parameters, employing the preset simulation model to perform simulation and verification so as to complete setting of the PID parameters.

Hydroelectric generating set speed regulation system PID parameter setting method and device

The invention discloses a speed controller parameter optimization method for suppressing the ultralow-frequency oscillation of a hydropower generating set based on a critical parameter. The method discovers, based on a characteristic equation expression equation of the hydroelectric generating set, that the reason of the ultralow frequency oscillation is that the speed controller has an over-low ratio of the proportion parameter to the integral parameter. According to a mechanism analysis conclusion, the method comprises three following steps of: (1) setting the integral parameter and the differential parameter of the speed controller; (2) searching the critical proportion parameter of the speed controller; (3) optimizing the proportion parameter of the speed controller. The method can obviously suppress the ultralow-frequency oscillation by optimizing the parameter of the speed controller in the system, and is easy to operate and suitable for software offline simulation.

Speed controller parameter optimization method for suppressing ultralow-frequency oscillation of hydropower generating set based on critical parameter

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Speed controller parameter optimization method for suppressing ultralow-frequency oscillation of hydropower generating set based on critical parameter