Method for optimizing governor parameters of large hydropower unit
A technology for hydroelectric units and governors, which is applied in the direction of circuit devices, AC network circuits, single-network parallel feeding arrangements, etc., can solve the problems of hydroelectric units with large proportions, and achieve the effect of improving the performance of primary frequency modulation
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[0053] Example 1:
[0054] The main parameters of the unit: the rated power of the unit is 475MW, the rated voltage is 18KV, the rated current is 16929A, the power plant is integrated into the grid voltage level is 500KV, the rated water head is 130m, the water flow inertia time constant is 2.82 seconds, and the generator moment of inertia GD2 is 150000t. m2, shutdown time is 14.3 seconds, boot time is 28.11 seconds, etc.
[0055] Set K in the PID parameter of the speed control system parameter of a hydropower plant I =0, K D =0, gradually increase K P Value, apply a load disturbance to the single-unit load system, observe the damping of the unit’s frequency oscillations until a constant-amplitude oscillation occurs, such as image 3 , Get the corresponding critical oscillation amplitude K Pmax , K Pmax = 7.5.
[0056] Pass the critical oscillation amplitude K Pmax Get K in PID parameter P = 4.6.
[0057] According to K P , Set K in the PID parameters of the speed control system P =4....
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