The power generation station in Haziz, Yemen consists of six power units for
electricity production. Each unit has a nominal capacity of 5 megawatts, resulting
in a total capacity of 30 megawatts for the station.
Each unit has a step-up transformer that converts the voltage from 11 kilovolts
(generator voltage) to 33 kilovolts (busbar voltage). This helps in more efficient
transmission of electricity in the power grid.
Power Unit 1 operates using Light Fuel Oil (LFO), which is a type of diesel fuel.
Power Unit 2 also operates on Light Fuel Oil (LFO), while Power Unit 3 operates on
Heavy Fuel Oil (HFO), which is essentially diesel.
1. Light Fuel Oil (LFO) System:
- Power Unit 1 and Power Unit 2 operate using Light Fuel Oil (LFO), which is
similar to diesel fuel.
- The station is supplied with high-quality light fuel that resembles diesel.
- LFO fuel is stored in dedicated tanks at the station and is then drawn and
delivered to the diesel engines in the production units.
- The fuel is burned in the diesel engines to generate heat, which in turn
converts water into steam to drive steam turbines.
- The steam turbines convert heat into mechanical energy, which drives the
electricity generators to produce electricity.
2. Heavy Fuel Oil (HFO) System:
- Power Unit 2 also operates on Heavy Fuel Oil (HFO), which is a type of diesel
fuel.
- The station is supplied with high-viscosity heavy fuel known as HFO or Mazut.
- Unlike light fuel, heavy fuel requires preheating before being introduced into
the diesel engines.
- HFO fuel is stored in dedicated tanks and heated using an appropriate heating
system.
- After heating, the heavy fuel is drawn and delivered to the diesel engines in
the production units.
- The fuel is burned in the diesel engines to generate heat, and the steam
turbines are operated in the same way as in the light fuel system.
It should be noted that the Heavy Fuel Oil (HFO) system requires additional heating
and engine startup procedures due to its high viscosity. This means that a suitable
fuel heating and preparation system must be in place before using it in the
engines.
1. Haziz Power Station 1:
- Haziz Power Station 1 has an independent SCADA system that controls its
internal operations.
- Programmable Logic Controllers (PLCs) and Human-Machine Interfaces (HMIs) are
used in this system.
- PLCs are used to monitor and control internal processes in the station, such
as monitoring temperatures, pressures, and operating the engines and generators.
- HMIs are used to display process-related data and present it to operators for
decision-making.
2. Haziz Power Station 2:
- Haziz Power Station 2 also has an independent SCADA system that controls its
internal operations.
- PLCs and HMIs are used for control and monitoring of processes in the station,
similar to Haziz Power Station 1.
- The system is used to monitor and analyze performance data in the station,
monitor electricity generation-related processes, and monitor devices and
equipment.
3. Haziz Power Station 3:
- Haziz Power Station 3 has an independent SCADA system that controls its
internal operations.
- PLCs and HMIs are used for control and monitoring of processes in the station,
similar to the previous stations.
- The system is used for monitoring and control of generation, conversion, and
distribution systems in the station, as well as efficient equipment performance
monitoring and operation.
