Dynamics of a Grid Connected Hybrid Wind-Solar and Battery System: Case Study in Naivasha-Kenya

Abstract This study was developed to understand the nature of dynamic characteristics of a hybrid wind-solar generation unit. Using excel tools, the results obtained were used to quantify the impact of such dynamic phenomena on the operation, stability and power quality of the overall system. Finally, remedial measures were developed to establish the Load-Power profile. This research was done on a hybrid wind-solar and battery system installed in a school in Naivasha-Kenya. The system consists of two wind turbines (0.9kW*2) and a PV system (1kW*3) connected to a 24V (57.6 kWh) battery system through charge controllers. The system relies on the grid connection whenever the renewable energy supply is low. The grid connection passes through an inverter charger which charges the batteries at the same time supply the Institution’s load. Whenever the batteries are full all the grid power is directed to the institutions load. The institution has a capacity of 246 students with loads in 6 classrooms, 2 laboratories, 4 dormitories, 1 computer lab with 10 computers and a library. In order to determine the performance of the hybrid wind-solar and battery system, wind and solar resources potential were measured in addition to the power generated and consumed. The above mentioned results were analyzed to understand the dynamics of a grid-integrated wind-solar system and corresponding local loads.