慣性機能付きインバータの過電流抑制機能による事故時短絡電流低下に伴う影響の検討

抄録

If an inverter-connected power supply is introduced into the power system with the expansion of the introduction of renewable energy, there is a concern that the inertia of the system will decrease, so research on inverters with inertial functions is underway. At the same time, there is concern about the influence of a decrease in short-circuit current. The authors focused on the influence on protection relays for transmission lines, clarified the influence of the fault current that occurs when the inverter power supply with inertia function continues to operate while suppressing the overcurrent in the event of a fault, comparing it with the synchronous generator, and examined the necessity of countermeasures. This paper reports the results.