Control method for preventing power regulation oscillation of hydroelectric generating set

Control method for preventing power regulation oscillation of hydroelectric generating set

  • CN 103,490,436 A
  • Filed: 10/11/2013
  • Published: 01/01/2014
  • Est. Priority Date: 10/11/2013
  • Status: Active Application
First Claim
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1. a control method that prevents the vibration of Hydropower Unit power adjustments, is characterized in that, comprises the following steps:

  • (1) power of the assembling unit is produced to the parameter adaptive controlling unit of non-linear effects by increase unit head and guide vane opening in the Hydropower Unit power control circuit, reach unit and do not affect the regulation quality that power is controlled when the operation principal parameter changes greatly;

    By calculating the adaptive factor of unit power adjustments, carry out the dynamic adjustments parameter of automatic calibration power of the assembling unit PID, adaptive factor is;

    R=1×

    f1(h)×

    f2(V)??(

    1)

    H-head;

    The function that f1 (h)-unit head forms power;

    The function that f2 (V)-unit guide vane opening forms power;

    The power of the assembling unit control to adopt single loop PID regulative mode, and the power of the assembling unit adaptive factor of calculating is for P, I, D variable parameter control, or becomes the mode such as PID input deviation gain, realizes the adaptive control of the power of the assembling unit;

    K p=k1/R??(

    3)

    T I=k2·

    R??(

    4)

    T D=k3/R??(

    5)

    Wherein, K p, T i, T d-be respectively proportionality coefficient, the time of integration, the derivative time of parallel connection type PID adjuster;

    The control parameter of k1~

    k3-adjust;

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

    For the control system without the PID variable element, adopt the deviation input outside PID to be multiplied by the adaptively correcting that R0/R realizes the unit operating mode, R0 is the adaptive factor calculated under the unit rated condition;

    (2) by increasing the filtering link in the power of the assembling unit signal measurement link power of the assembling unit PID regulates, increase the damping in unit closed-loop adjustment loop, avoid the resonant belt with electric network active and FREQUENCY CONTROL, make power of the assembling unit control more stable;

    The measurement links of controlling in the power of the assembling unit adds filtering;

    L PV=Filter(L)??(

    6)

    L-power of the assembling unit;

    Filter-filtration module;

    L pV-filtered the power of the assembling unit.

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