ON THE POSSIBILITY OF SUPERCAPACITOR USING IN AUTONOMOUS WIND-DIESEL COMPLEXES

The paper deals with the features of wind-diesel units operation at a high frequency of wind speed variations. Various options of the wind farm complex layout are considered on the basis of the following input data: 1) consumer load schedule (Ust-Voyampolka village in the Kamchatka Territory); 2) the characteristics of domestic diesel-generator sets and supercapacitors; 3) characteristics of wind power generators of Chinese production. We have made the estimates using a balance model and two calculation algorithms which differ in the details of the initial data on the wind regime (the periodicity of the data is 3 hours and 2 seconds respectively). It is proposed to optimize the energy complex composition by partitioning the diesel generator set and by using a supercapacitor battery to compensate for the variable output of wind generators. It is shown that under the typical wind conditions and daily load graphs of the consumer, the optimum capacity of the supercapacitor battery in the wind farm is 324 Wh. Moreover, increasing the capacity of supercapacitor does not reduce fuel consumption. Comparison of technical and economic characteristics of the supercapacitors and batteries with a similar energy capacity suggests that the supercapacitor module can have an advantage over the battery due to cost and resource parameters, as well as higher permissible charge-discharge currents. It is shown that the introduction of a wind-electric generator into the system can lead not only to a decrease in the consumption of diesel fuel, but also to a deterioration of the technical and economic indicators of the diesel generator set due to its operation at low power.

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