At present, with the continuous growth of enterprise business, the daily energy consumption of the data center also shows a synchronous growth trend. Once the mains power fails, a single diesel generator cannot meet the backup power capacity demand of the data center. Therefore, multiple units are often required to run simultaneously. Ruikeda generator plant to introduce the diesel generator automatic control system working principle.
In order to guarantee the stability of the diesel generator set runs weaver often USES the droop control, namely, respectively by P/f control and Q/V prolapse control to obtain a stable frequency and voltage, the control method of each unit and output of active power and reactive power control, respectively, without communication and coordination among each unit, the equivalence between each unit control, ensure the balance between supply and demand of diesel generating sets weaver system and frequency stability.
Droop control adopts voltage and current double loop control, the current inner loop has a fast dynamic response to improve the power quality of the generator set, while the voltage outer loop controller has a slow dynamic response, which can control the output voltage of the system and generate the reference signal of the inner loop. Firstly, the voltage and current of the load point are collected by the measurement module to calculate the instantaneous active and reactive power output of the generator set, and then the corresponding average power is obtained through the low-pass filter LPF. Assuming the rated frequency is run, generator output active power P, F, U is the frequency of the power system respectively, and the rated voltage amplitude, output frequency and voltage amplitude is obtained by sagging link's instructions, again through the voltage reference voltage synthesis link, then, will serve as a reference voltage input voltage current double link controller.