Abstract:
This thesis presents an analysis of the static state of system stability of energy
storage system for load variations and renewable energy sources. This study was
divided into two cases: Case 1, simulation of the IEEE 69 standardized test system.
Case 2, simulate the 115 kV electrical system in the service area of Nakhon Ratchasima
Power Station 2. The OpenDSS program has been used to analyze the installation and
control of energy accumulation systems in conjunction with renewable energy sources
under the requirements of the Provincial Electricity Authority. It considers the change
in load in the day cycle and calculates the economics. The simulations showed that
the surplus of electricity generated by the renewable energy sources was loaded into
the energy storage system to be used during periods of peak load shaving. While
considering the optimal position and size of the energy storage system in the
conjunction with the renewable energy sources, the minimum system loss of electricity
in Cases 1 and 2 was -5.90 % and -0.50 %. The effect of the minimum load voltage
deviation is -20.93 % and 0.225 %, respectively. Therefore, this study can be used as
a way to develop and improve the electrical system to support the future expansion
of loads in electrical systems.