Wind power plant primary frequency modulation control method and control system
A technology of wind farm and system frequency, applied in the field of primary frequency modulation control method and control system of wind farm, can solve the problems of grid dynamic imbalance, increase system cost, increase grid frequency deviation, etc. Additional active power, the effect of improving frequency adaptability
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Embodiment 1
[0047] like figure 1 As shown, the first embodiment of the present invention provides a method for primary frequency modulation control of a wind farm, the method comprising: receiving a scheduling instruction;
[0048] Obtain the grid-connected point measurement value;
[0049] The measured value of the grid-connected point includes the voltage and current of the grid-connected point;
[0050] The voltage and current of the grid-connected point are output to a high-precision frequency measuring device, and the system frequency and frequency change rate of the grid-connected point are calculated;
[0051] refer to figure 2 , based on the difference between the rated frequency of the power grid and the system frequency of the grid-connected point, determine whether the difference exceeds the first dead zone of primary frequency regulation: according to the grid-connected requirements of the wind farm, the first dead zone of primary frequency regulation is set to ±0.05Hz;
[0...
Embodiment 2
[0092] like Figure 4 As shown, based on the same inventive concept, the second embodiment of the present invention provides a wind farm primary frequency modulation control system, the control system includes:
[0093] A FM host 11 is configured as,
[0094] Based on the difference between the rated frequency of the power grid and the system frequency and the frequency change rate, it is judged whether to enable the primary frequency regulation function of the system;
[0095] If it is started, the total active power adjustment required by the wind farm is obtained based on the joint control strategy of frequency droop and virtual moment of inertia, and then the total active power adjustment is superimposed on the initial AGC system command value and output to the energy management platform to adjust the wind turbine output. Wind farm primary frequency modulation function. details as follows:
[0096] Based on the difference between the rated frequency of the power grid an...
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