Recent Developments in Impedance Measurement Techniques for Active Distribution Networks

The dynamic change characteristics of the impedance characteristics of active distribution networks put forward new requirements for impedance measurement methods. This paper summarises the current research status of the two impedance measurement methods, i.e. injective and non-injective, respectively. The advantages and disadvantages of the two methods are analysed respectively: the injective method is costly and effective; the non-injective method is low-cost and low effective; therefore, both methods are not the best impedance measurement scheme when used alone, and finally the research idea of integrating the two methods is proposed.