An optimization method for operational efficiency of ADN with four-port SSOP

Abstract

The soft open point (SOP) replaces the traditional feeder switch based on controllable electronic converter, it provides real-time and accurate active and reactive power flow control. To address the optimization effects of SOP on the operating efficiency of active distribution network(ADN), this paper firstly establishes the access topology and mathematical model of four-port SOP with energy storage (SSOP) considering the operating constraints of four-port SSOP converter and DC-side energy storage device; secondly, an optimization model of the operating efficiency of ADN based on four-port SSOP is established, where power loss reduction, feeder load balancing and voltage profile improvement were taken as objectives. Semi-definite programming is used to simplify the model and convert nonlinear constrains into linear quantities. Case studies of a four-port SSOP in a ADN are conducted to verify the effectiveness and efficiency of the proposed method.

Keywords

• Four-port SSOP
• Soft open point
• Active distribution network
• Operational efficiency