Abstract
In the present study, a new strategy of analysis was used to determine the optimal interval of a single-phase resistive load to operate a fixed-speed wind turbine. The essence of this optimal range is to enable the generator to have stable voltages and current balances, large power, and an acceptable frequency range, and also mitigate generator overheating. The generator windings and excitation capacitances were prepared according to the C-2C connection scheme with suitable values of excitation capacitances. The admittance matrix of the system was based on positive and negative sequence generator voltages and was calculated by symmetrical components theory. The generator performance was found through optimization of the determinant admittance matrix magnitude. Moreover, balanced position of the generator can be achieved near the maximum load power. Consequently, the best interval of resistive load of the generator (1.5 kW) was found around 2% voltage unbalance factor. The appropriate optimal load was approximately ±6% of the perfect balance resistive load value.
Highlights
Power supply in remote rural regions such as islands, military apparatus, ships, and villages is essential for the sustainable growth of a country
Since most of the resistive loads fed by isolated power systems are based on a single-phase system, a single-phase generator is a better choice
The squirrel cage machine was simulated when a fixed speed wind turbine was connected as a prime mover
Summary
Power supply in remote rural regions such as islands, military apparatus, ships, and villages is essential for the sustainable growth of a country. The C-2C connection was used in this application due to its simplicity, costs, and perfect balance point These optimal values and load range result in the reduction of initial operation cost, reduction in the unbalance effects of the SEIG, and supplying high-quality energy to consumers. The strategy of system analysis Usually, electric systems in remote rural areas are not complex and must have low initial costs For these reasons, a fixed-speed wind turbine, SEIG, and single-phase network are usually preferable. The deviation in frequency should not exceed ±5% if the voltage is at the rated value, while the variation in voltage should not exceed ±10% if the frequency is at the rated value [22] Through these limitations and association with perfect balance point, maximum power point, and breakdown point, the best loading interval of the SEIG can be found. Updating the values of excitation capacitors or selecting IM within appropriate service factor
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