How We Deliver Power to You!
JPS serves customers through a network that involves our power generating plants, transmission and distribution system and our customer service offices
is the conversion of wind energy into a useful form, such as electricity, using wind turbines.
Hydropower, hydraulic power or water power is power that is derived from the force or energy of moving water.
is a power plant that burns fossil fuels such as coal, natural gas or petroleum (oil) to produce electricity.
The electricity from the plants flows through metal conduction to a switchyard, which controls the flow of the electricity into the voltage transmission lines.
Transmission lines efficiently carry high-voltage electricity over long distance to substations.
An electrical substation is a subsidiary station of an electricity generation, transmission and distribution system where voltage is transformed from high to low or the reverse using transformers.
Electricity distribution is the final stage in the delivery (before retail) of electricity to end users. A distribution system’s network carries electricity from the transmission system and delivers it to consumers.
The pole-mounted transformer reduces the voltage to a level that can be used in homes and businesses.
The myHome JPS custmomer usually a family dwelling consuming the lowest voltage of electricity.
The business JPS custmomer usually a small to large myBusiness entity consuming a slightly higher voltage than a residence.
JPS produces electricity using steam (oil-fired), combustion gas turbines, combined cycle, diesel, hydroelectric, and wind. We have four main power plants: Rockfort and Hunts Bay in Kingston, Old Harbour Bay in St. Catherine and Bogue in St. James.
We currently have access to approximately 820 megawatts (MW) of total installed generation capacity. This includes close to 197 MW from the following Independent Power Producers (IPPs):
- Jamaica Energy Partners (JEP)
- Jamaica Private Power Company (JPPC)
- Wigton Wind Farm
Power Generation Technologies
The steam generating units are the foundation units of our generating system, and are often referred to as the “base load” units. The process of electricity generation via the steam generating units is as follows:Heavy-duty oil is taken from a bulk storage tank (typically 25,000 barrel capacity) and is supplied to a fuel pumping and heating set. At the pumping and heating set this fuel oil is heated to approximately 220°F in order to reduce its viscosity, and to enable it to burn easily. The heated fuel oil is pumped under pressure (approximately 250 psig) to the furnace of a steam generator (boiler) where it mixes with a large volume of air and is burnt. After combustion takes place a large volume of high temperature gas (approximately 2400°F) is released. The heat, which is now available, is transferred to very high purity de-mineralized water contained in hundreds of tubes, which form part of the construction of the boiler. The water is converted into high temperature and high-pressure steam through different stages of boiling and super heating within the confines of the boiler tubes. This high pressure, high temperature steam then passes through a main steam pipe to the turbine. (The turbine is a device used to convert the heat energy contained in the high pressure temperature steam into mechanical energy.) The turbine shaft is connected to the rotor of an electric generator and causes this rotor to rotate at high speeds. Coils of wire (field windings) are embedded into the rotor of the generator through which direct electrical current is allowed to flow. As this current flows, a strong magnetic field is formed. This rotating magnetic field is allowed to interact with another set of wires (stator coil), which are in this case stationary. It is this interaction of the magnetic field with the stationary wires that produces electricity.