It is a kind of to prevent the control method of Hydropower Unit power regulation oscillation

It is a kind of to prevent the control method of Hydropower Unit power regulation oscillation

  • CN 103,490,436 B
  • Filed: 10/11/2013
  • Issued: 07/28/2017
  • Est. Priority Date: 10/11/2013
  • Status: Active Grant
First Claim
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1. a kind of prevent the control method of Hydropower Unit power regulation oscillation, it is characterised in that comprises the following steps:

  • (1) by increasing unit head in Hydropower Unit power control circuit with guide vane opening to power of the assembling unit generation non-threadProperty influence parameter adaptive control link, reach unit run principal parameter change greatly when do not influence the regulation of Power ControlQuality;

    By calculating the adaptive factor of unit power adjusting, carry out the automatic dynamic regulation parameter for correcting power of the assembling unit PID, it is adaptiveThe factor is answered to be:

    R=1×

    f1(h)×

    f2(V) (

    1)

    H-head, V-guide vane opening;

    The function that f1 (h)-unit head is formed to power, f1 (h) represents the power of correspondence unit head;

    The function that f2 (V)-unit guide vane opening is formed to power, f2 (V) represents the power of correspondence unit guide vane opening;

    Power of the assembling unit control uses single loop PID regulative modes, and the power of the assembling unit adaptive factor of calculating is used for P, I, D variable elementRegulation, or become PID input deviation gain modes, realize the Self Adaptive Control of the power of the assembling unit:

    Kp=k1/R (

    3)

    TI=k2·

    R (

    4)

    TD=k3/R (

    5)

    Wherein, KP

    TI

    TD- it is respectively the proportionality coefficient of parallel connection type PID regulator, the time of integration, derivative time;

    The control parameter for k1~k3-adjust;

    The adaptive factor of R-power of the assembling unit PID regulations;

    For the control system without PID variable elements, using the deviation input outside PID be multiplied by R0/R realize unit operating mode fromCorrection is adapted to, R0 is the adaptive factor that calculates under unit declared working condition;



    Two)

    By increasing filtering link in the power of the assembling unit signal measurement link that power of the assembling unit PID is adjusted, increase unit is closedThe damping of ring regulating loop, avoids the resonant belt with electric network active and FREQUENCY CONTROL, makes power of the assembling unit control more stable;

    The measurement links controlled in the power of the assembling unit add filtering:

    LPV=Filter(L) (

    6)

    L-the power of the assembling unit;

    Filter-filtration module;

    LPV- filtered the power of the assembling unit.

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