Wind power and solar energy systems are among the green energy options that have been developed to a fairly large extent in many countries. Along with this development comes the concept of microgrids – localized grids that can disconnect
from traditional grids to operate autonomously and distributed generation (DG) – an approach where renewable energy generators are located near consumption areas. In this paper, an electric utility in Negros Oriental is selected and wind power is considered. An optimization study conducted
separately has identified that wind power generation is an optimal resource given the load profile and the location of the site. It is important to check the present system before determining the possible operational behavior of the system with an additional generator. The challenges in the planning, operation, maintenance, and control of a power system are partly solved and determined using computer-based power system analysis. Electrical Transient Analyzer Program (ETAP) is used in this study. Generation matches load. The existing distribution system for this electric utility has shown bus marginal undervoltages during the load flow. Some cables appear overloaded. Certain overcurrent protective devices in the substations will be in critical states whenever faults occur in the incoming buses. The behavior of the system with and without wind power generation is observed and evaluated.
The wind turbines tend to increase the bus voltages, especially at the nearest bus. Transient stability simulations for the existing system exhibit stability while in the new system some parameters are not able to recover.
