Abstract
This research paper focuses on modelling and simulation of 330 KV, 600 MW Shiroro Substation in the DIgSILENT Environment for the integration of Hybrid Solar PV – Hydro System to improve power supply in the Federal Capital Territory (FCT) of Abuja, Nigeria. A hybrid energy system is a system that combines multiple types of energy generations to satisfy the demand of the users effectively and efficiently. The Solar Photovoltaic (PV)/Hydro hybrid system consists of electrical energy generated from solar PV and hydro energy. Effect of environmental issues, reduction of fossil fuels in addition to its high cost have actively encouraged interest in great integration of renewable energy sources in power systems. This work capitalized on the possibilities of harnessing commercial solar energy and feeding it to the National grid through a nearby 330 KV substation at Shiroro Dam. The simulation is carried out in DIgSILENT (Power factory) environment. The Shiroro 16 kV, 330 kV, 600 MW Transmission Lines are modelled, and results of simulations of the five bus bars (Jebba, Shiroro, Gwagwalada, Katampe and Kaduna) voltages directly connected to Shiroro Network are: 331.8kV, 331.7 kV, 329.3 kV, 325.6 kV and 332.2 kV, respectively. All the values are within the Operational and Statutory Limits of the National Grid Code.
Highlights
Constant power supply to the Federal Capital Territory (FCT) as Shiroro Substation is connected to the existing Katampe and Gwagwalada 330 kV substations which are among the major sources of power supply to the FCT
The results show that involving the PV inverter in voltage control activities promise better future for penetration of renewable energy into distribution network for tropical country like Malaysia, which receives solar radiation throughout the year [17]
The transmission lines data including the transformer loadings are collected from System Planning and Development Department (SP & D) of Transmission Company of Nigeria (TCN) whereas the generator and load data are collected from National Control Centre (NCC), Oshogbo
Summary
Constant power supply to the Federal Capital Territory (FCT) as Shiroro Substation is connected to the existing Katampe and Gwagwalada 330 kV substations which are among the major sources of power supply to the FCT. The authors [12] concluded that; it is technically feasible to connect the 50 MW Mokwa power plant to the grid as all the voltages are within acceptable limits and no additional reinforcement are required to evacuate the 50 MW Mokwa power plant and no upgrade of breaker is needed as all the short circuit fault currents did not exceed the existing breaker ratings. The HPWS proposed system will supply additional generated power of 40 MW at 16 kV to the aforementioned section of the grid network and the major focus was on the steady state stability of the electric grid network which was modelled with specified loads [16]. The design was simulated using PV*SOL software to evaluate the system’s production performance and to know the amount of electric power generation for every day of the year and the system energy yield is much more than satisfactory [18]
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