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
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 nonthreadProperty 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）
Hhead, Vguide 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：
K_{p}=k1/R （
3）
T_{I}=k2·
R （
4）
T_{D}=k3/R （
5）
Wherein, K_{P}、
T_{I}、
T_{D} it is respectively the proportionality coefficient of parallel connection type PID regulator, the time of integration, derivative time；
The control parameter for k1~k3adjust；
The adaptive factor of Rpower 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：
L_{PV}=Filter(L) （
6）
Lthe power of the assembling unit；
Filterfiltration module；
L_{PV} filtered the power of the assembling unit.
Chinese PRB Reexamination
Abstract
A kind of to prevent the control method of Hydropower Unit power regulation oscillation, step of the present invention is：1）Larger parameter adaptive control link is influenceed on the power of the assembling unit by the unit head etc. that increases in Hydropower Unit power control circuit of proposition, reaches that unit does not influence the regulation quality of Power Control when operation principal parameter is changed greatly；2）By the controlled parameter measurement link increase filtering link in water turbine set power adjusting of proposition, increase the damping of unit closed loop regulating loop, avoid the resonant belt with power network, make power of the assembling unit control more stable；3）By increasing the Linearized correction that guide vanes of water turbine aperture is controlled, hydraulic turbine aperture linearisation level is improved, promotes the power adjusting of unit more steady.The present invention has the lowfrequency oscillation of electric power system that can be significantly reduced the initiation of Hydropower Unit oscillation of power, improves the remarkable advantage of the security and stability level of unit and power network.
1 Claim

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 nonthreadProperty 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）Hhead, Vguide 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： K_{p}=k1/R （
3）T_{I}=k2·
R （
4）T_{D}=k3/R （
5）Wherein, K_{P}、
T_{I}、
T_{D} it is respectively the proportionality coefficient of parallel connection type PID regulator, the time of integration, derivative time；The control parameter for k1~k3adjust； The adaptive factor of Rpower 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： L_{PV}=Filter(L) （
6）Lthe power of the assembling unit； Filterfiltration module； L_{PV} filtered the power of the assembling unit.

Specification(s)