Abstract
AbstractWith the increasing penetration of inverter-interfaced distributed generators (IIDGs), the power flow in the distribution network changes accordingly. Feeder automation (FA) based on unidirectional power flow design may not be able to cope with the scenario after the IIDG connection. It is urgent to study the impact of the IIDG on local FA. First, the fault equivalent model of IIDG is analyzed in combination with the low voltage ride-through strategy. On this basis, taking two local feeder automation modes, voltage-time and voltage-current modes which are widely used at present, as examples, their operating principles are discussed, respectively. Combined with the faults at different positions upstream and downstream of the point of common coupling (PCC) in the distribution network, the impact of IIDG integration on the action of each switch of local feeder automation is analyzed in detail. Finally, the local FA simulation model is established by using PSCAD/EMTDC, which verifies the rationality of the theoretical analysis.KeywordsInverter-interfaced distributed generatorVoltage time typeVoltage current typeFeeder automationDistribution network
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