An intra-day rolling dynamic dispatch for isolated microgrid with MPC method

Common microgrid dispatches are mainly based on static model and ignore the dynamic characteristic of the micro-turbine system when dispatching on a short time scale. In this paper, based on an isolated microgrid, an intra-day rolling dynamic dispatch problem considering the dynamic characteristic of micro-turbine on a short dispatch time scale is formulated under the framework of model predictive control (MPC), and then solved by the mixed integer linear programming (MILP) algorithm. In addition, the actual output of the micro-turbine is obtained and compared with its setpoint given by the dispatch results. The simulation results show that the dynamic dispatch strategy has less output power deviation and can make full use of the micro-turbine to formulate a more reasonable dispatch plan compared with the static one.

I. Introduction

Nowadays, people pay more and more attention to environmental pollution and resource shortage problem. Microgrid technology and renewable energy generation have been extensively studied and developed in order to achieve sustainable development and meet the increasing power demand. Microgrids can manage and coordinate distributed generation, storage and load in a more decentralized manner [1], which can improve energy efficiency and reduce greenhouse gas emissions.