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PID parameter switching method and device for a water turbine set speed regulator

A governor and parameter technology, applied in safety devices, optimizing machine performance, machine/engine, etc., can solve problems such as inability to find PID parameters, and achieve the effect of suppressing ultra-low frequency oscillations

Active Publication Date: 2019-10-25
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, from an optimization point of view, a feasible solution to an optimization problem that satisfies multiple objectives does not necessarily exist, that is, it may not be possible to find a PID parameter that satisfies both the primary frequency modulation performance and the stability index in the actual optimization process

Method used

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  • PID parameter switching method and device for a water turbine set speed regulator
  • PID parameter switching method and device for a water turbine set speed regulator
  • PID parameter switching method and device for a water turbine set speed regulator

Examples

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Effect test

Embodiment 1

[0047] see figure 1 , is a schematic flowchart of a PID parameter switching method for a water turbine unit governor provided in Embodiment 1 of the present invention, including:

[0048] S101. Using the preset PID parameter tuning algorithm to optimize and tune the PID parameters of all water turbine governors to obtain the first PID parameter and the second PID parameter; wherein, the PID parameter that satisfies the primary frequency regulation performance index is used as the second PID parameter A PID parameter, the PID parameter satisfying the performance index of suppressing ultra-low frequency oscillation is used as the second PID parameter.

[0049] It should be noted that the PID parameters include the proportional link magnification Kp, the integral link magnification Ki and the differential link magnification Kd.

[0050] S102. Group the governors of the hydroturbine units according to the corresponding active power amplitude when the governors of the hydroturbine...

Embodiment 2

[0098] see Figure 4 , is a schematic structural diagram of a PID parameter switching device for a water turbine unit governor provided in Embodiment 2 of the present invention, including:

[0099] The PID parameter setting module 201 is used to use the preset PID parameter setting algorithm to optimize and set the PID parameters of all water turbine speed governors to obtain the first PID parameter and the second PID parameter; wherein, to meet the primary frequency regulation performance index The PID parameter is used as the first PID parameter, and the PID parameter that satisfies the performance index of suppressing ultra-low frequency oscillation is used as the second PID parameter;

[0100] The water turbine unit speed governor grouping module 202 is used to group the water turbine unit speed governors according to the corresponding active power amplitude when the water turbine unit speed governor oscillates, and determine the water turbine unit speed governors in each ...

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Abstract

The invention discloses a PID parameter switching method and device for a water turbine set speed regulator. The PID parameter switching method comprises the following steps that the optimal-tuning ofPID parameters of all the water turbine set speed regulators are conducted by adopting a preset PID parameter setting algorithm, and a first PID parameter and a second PID parameter are obtained; thewater turbine set speed regulators are grouped according to the active power amplitude corresponding to the occurrence of oscillation of the water turbine set speed regulators, and a PID parameter operation mode of each set of water turbine set speed regulators is determined; a PID parameter fuzzy switching model of the water turbine set speed regulators is correspondingly constructed according to the PID parameter operation mode of each water turbine set speed regulator; real-time frequency deviation values obtained in real time are input into the PID parameter fuzzy switching models, and the PID parameter operation modes of the water turbine set speed regulators are switched according to the output results of the PID parameter fuzzy switching models, so that the water turbine set speedregulators can simultaneously consider the one-time frequency modulation performance and the damping level, and then ultralow-frequency oscillation of a power plant side inhibition system can be realized.

Description

technical field [0001] The invention relates to the technical field of electric power system and water turbine adjustment, in particular to a method and device for switching PID parameters of a speed governor of a water turbine unit. Background technique [0002] Frequency is an important index to measure power quality. As a primary frequency regulation mechanism, the turbine speed governor will not only affect the frequency characteristics of the system, but also affect the dynamic stability of the system. With the increasing frequency requirements of the power system, a large number of new energy sources with randomness and increasingly severe load fluctuations, the governor is required to ensure that the unit has sufficient primary frequency regulation in parameter settings. For this reason, some power plants set the parameters of the unit governor extremely sensitively, so that when the grid frequency deviates, the unit can quickly and fully perform a frequency adjustme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B15/08G06F17/50
CPCF03B15/08F05B2260/84F05B2270/20F05B2270/706F05B2270/70G06F30/20Y02E10/20
Inventor 江出阳蔡东阳陈刚刘蔚
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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