Planning of Microgrid considering power quality constraints

Power quality problems, such as voltage fluctuation and harmonic, limit high integration of Microgrid. This paper introduces a planning method for Microgrid in distribution network considering power quality constraints preliminarily before integration. By studying the behavior of distribution generation and load, the probabilistic power fluctuation model of Microgrid is derived, and the static-state evaluation of power quality of Microgrid is given as follows. In addition to consider objectives of reduction of network loss and improvement of other economic benefits, this paper has optimized power quality indexes into related objectives, and a chance-constrained model for Microgrid integration is built. As this problem is a mixed integer one consisting of both linear and non-linear element, the LDIW-PSO algorithmic is introduced. To test the validity of the proposed approach, the study is simulated under IEEE 33-bus system by utilizing a practical industrial “Chuang Yi Microgrid” data. Findings and results show the efficiency and suitability of the proposed strategy in solving power quality problems, and hence increase penetration of Microgrid in distribution network.