A Method for Calculating the Security Boundary of Photovoltaic-connected Distribution Networks

This paper describes a method for calculating the security boundary of photovoltaic-connected distribution networks based on the idea of steady-state security region. First, we build a medium- and a low-voltage distribution network and present them in this paper. Then, a linear power flow model is presented. A related distribution network security region calculation method is designed according to it. The last section shows the algorithm error and verifies the accuracy of the security region. The method is a guidance for not only the planning and construction but also the dispatching and operation of the distribution network.