The increasing efficiency of solar cells makes it popular for residentials to install photovoltaic (PV) systems. The incoming of PV systems helps grid to alleviate the stress under peak load condition, while in light load PV systems inject power into grid, changing the traditional radical power flow in the distribtution grid.This makes the Distribution Network Operator (DNO) hard to operate On-Load Tap Changer (OLTC) only based on local voltage. A loosely-coupled monitoring system thus is needed to collect basic information of all users for DNO. Furthermore, a tightly-coupled control system is needed to react to the changes of PV systems. Currently, PV systems use maximum power point tracking (MPPT) algorithm to generate power, which results in voltage rise and reverse power flow problem. Because of these two problems, users at different position in the grid have unequal opportunity to generate power into grid and thus unfairness occurs. The tightly-coupled system utilizes wireless mesh network to coordinate the power tracking of PV systems. Using this method, grid resource can be maximally and equally utilized by all users. 

 

People: Yibo Pi

 

Papers: 

X. Wang, Y. Pi, W. Mao, and H. Qian, “Network Coordinated Power Point Tracking for Grid-Connected Photovoltaic Systems,” IEEE Journal on Selected Areas in Communications, vol.32, no.7, pp.1425,1440, July. 2014.

 

X. Wang, Y. Pi, and A. Tang, “Scheduling of Electric Vehicle Charging via Multi-Server Fair Queueing,” IEEE Transactions on Parallel and Distributed Systems, Volume 28, no. 11, Pages 3298-3312. Nov. 2017.