Dynamic parameter adjusting method for active power of generator set, and storage medium

Abstract

The invention discloses a dynamic parameter adjusting method for active power of a generator set, and a storage medium. The method comprises the following steps: (1) performing a dynamic parameter PIDadjusting method; (2) performing dynamic parameter adjustment: setting three groups of different proportionality coefficients Kp1, Kp2 and Kp3 which are respectively suitable for large-amplitude quick adjustment, middle-amplitude slow adjustment and small-amplitude fine adjustment; (3) performing a dynamic parameter adjustment method: when judging that e(k) is large, calling Kp1, when it is judged that e (k) is medium, calling Kp2, and when it is judged that the e (k) is small, calling Kp3. According to the method, when the set is in different active power regulation working conditions or indifferent stages of one active power regulation, the method can automatically call a proper proportionality coefficient to participate in PID calculation in each regulation period, a most proper calculation result can be obtained and issued to a speed regulator system to act on a guide vane, and finally, the active power output of the unit is adjusted to enable the set to obtain an optimal activepower adjustment dynamic effect.

Description

technical field [0001] The invention relates to a dynamic parameter adjustment method and a storage medium for the active power of a generating set, and belongs to the technical field of hydroelectric power generation. Background technique [0002] At present, the active power regulation of domestic large and medium-sized hydro-generating units generally adopts the PID control strategy, but generally only adopts the proportional link, does not use the integral and differential links, and the parameters are fixed. [0003] In this mode, the performance of the active power regulation of the unit depends on the setting of the proportional coefficient Kp, which is too single and not flexible enough. Once the control parameters are set improperly, or the operating conditions of the unit change, the active power regulation performance will deteriorate, and even accidents and equipment damage will be caused. [0004] For the bulb tubular hydroelectric generator set in a weak grid ...

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Problems solved by technology

[0003] In this mode, the performance of the unit’s active power regulation depends on the setting of the proportional coefficient Kp, which is too single and not flexible enough

Once the control parameters are set improperly, or the operating conditions of the unit change, the active power regulation performance will deteriorate, and even accidents and equipment damage will be caused.

[0004] For the bulb tubular hydroelectric generator set in a weak grid with small grid capacity, no large-capacity fixed load users, frequent active power adjustment, and unstable operation, on the one hand, due to the dual adjustment mode of blade-guide vane, and has Due to the characteristics of small moment of inertia and fast speed change, the traditional active PID control strategy often has unqualified adjustment situations such as adjustment overtime, large overshoot range, and many fluctuations, which seriously reduces the power quality and threatens the safe and stable operation of the unit and the power grid.

On the other hand, in the case of large machines and small grids, the unit frequently participates in active power regulation, and an improper active power regulation strategy will cause the unit to operate frequently and for a long time under the condition of guide vane-blade non-association, causing unit vibration, The increased swing can easily cause the bolts of the turbine components to loosen and the local stress to increase. The risk of damage to the main engine components of the unit will rise sharply, threatening the safe and stable operation of the unit for a long period of time.

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