Визначення закономірностей зміни ємності конденсаторного збуджувача зі змінною топологією для асинхронного генератора

The object of the study is an autonomous induction generator equipped with a capacitor exciter with a variable topology. Neglecting the influence of the generator rotor rotational frequency and load level on the required exciter capacitance, as well as the difficulties with its regulation over a wide range, leads to fluctuations in the output voltage. This is the reason for the decrease in the quality of power supply to consumers. This problem is solved by identifying the relationship between the required exciter capacitance, on the one hand, and the rotation frequency and load power, on the other. Also, by using a capacitor circuit, the topology of which can be changed, implementing different ways of connecting capacitors. The direct dependence of the required exciter capacitance value on the load power and the inverse dependence on the rotational frequency have been confirmed. The insignificant influence of the linear interaction of such factors on the required capacity has been established. The width of the fuzzy interval of coefficient at the relative power value is 0.01, for the coefficient at the rotational frequency – 0.36. This causes a significant increase in the uncertainty of estimating the required capacity as the rotational frequency increases. The possibility of maintaining the generator output voltage within the limits permitted by EN 50160 using a capacitor exciter with a variable topology has been confirmed. The exciter circuit allows to adjust the capacitance within the adjustment range according to a monotonic rising characteristic. The proposed method of controlling the capacitive excitation current allows generating an order of magnitude more current levels compared to analogues due to the use of parallel, series, and mixed connections of capacitors. The obtained results can be applied in the construction of control system for capacitor exciter with a variable topology for an autonomous induction generator.