HEEE322 PRACTICAL
TOPIC :DESIGNING OF A HYBRID POWER SYSTEM FOR HIGH RELIABILITY
AND
SUSTAINABILITY
NAME : BRIAN MAZHARA
REG/N : R2112046C
PROG : ELECTRICAL AND ELECTRONIC ENGINEERING
WEEK2 TASK:
Detailed system design and component selection for a reliable and sustainable power supply
system for Midlands State University's Zvishavane Campus:
SYSTEM DESIGN:
The proposed system will consist of the major components:
1. Solar Power Generation
• A solar photovoltaic (PV) array will be installed to generate electricity from solar energy.
2. Energy Storage
• A battery bank will be used to store excess energy generated by the solar PV array for use
during periods of low sunlight or at night.
3. Backup Power
• A diesel generator will be used as a backup power source during extended periods of low
sunlight or when the battery bank is depleted.
4. Power Distribution
•
A power distribution system will be designed to supply power to the university's
buildings and facilities.
COMPONENT SELECTION
1. Solar PV Array
•
Panel Type – Aiko Solar Neostar monocrystalline silicon solar panels with high
efficiency ratings (≥18%)
•
Panel Capacity- panel capacity of 500 kW will be used to cater for the load.
•
Mounting Structure -Fixed tilt system will be chosen based on its lower upfront cost and
less maintenance due to fewer mechanical parts.
2. Energy Storage
•
Battery Type – Battle Born LiFePO4 Deep cycle lithium-ion batteries with high
discharge rates and long lifespan (≥10 years). The Deep Cycle Lithium-ion batteries can
be discharged to a low state of charge without damaging the battery, also possesses long
life cycle.
•
Battery Capacity - 250 kWh (expandable to 500 kWh).
•
3. Backup Power:
Generator Type – Cummins CK300VM-T4 Final diesel generator with high efficiency
and an EGR system that reduces nitric oxide emissions.
•
Generator Capacity - 250 kW (expandable to 500 kW).
4. Power Distribution:
•
Distribution Type - AC distribution system with multiple feeders and circuit breakers
•
Transformer – Siemens GEAFOL Cast Resin transformers will be used for efficient
power transmission and distribution
Other Components:
1. Inverters: SolarEdge HD wave will be used for their High-efficiency in converting DC
power from the solar PV array and battery bank to AC power.
2. Charge Controllers: High-efficiency charge controllers for regulating battery charging
and discharging. (Morningstar Tristar MPPT)
3. Monitoring System: A monitoring system for tracking system performance, energy
production, and battery state of charge.
System Sizing:
The system will be sized based on the university's energy requirements, taking into account
factors such as:
•
Energy Demand - Average daily energy demand of the university
•
Peak Demand - Maximum power demand during peak hours
•
Load Profile - Load profile of the university, including daytime and nighttime energy
usage
Taking the above into account, the proposed system will have:
•
Generation – a medium voltage generation of 20KV
•
Transmission- provision for efficient transmission will be made
•
Distribution- a secondary distribution system would step down the voltage to 11KV for
distribution across campus.
•
Substations – via this, power transformation to usable voltage levels of 450V or 230V for
buildings and facilities.
System Control:
The system will be controlled using a sophisticated control system that optimizes energy
production, storage, and distribution. The control system will:
•
Monitor Energy Production - Monitor energy production from the solar PV array and
adjust energy storage and distribution accordingly
•
Optimize Energy Storage - Optimize battery charging and discharging based on energy
demand and availability
•
Control Backup Power - Control the diesel generator's operation based on energy demand
and battery state of charge
This design and component selection will provide a reliable and sustainable power supply
system for Midlands State University's Zvishavane Campus.
Benefits:
The proposed system will provide a number of benefits, including:
1. Renewable Energy - Utilize solar energy to reduce reliance on fossil fuels and lower
greenhouse gas emissions.
2. Energy Independence - Enhance energy independence and reduce reliance on the national
grid.
3. Reliability - Ensure a reliable power supply to critical systems and facilities.
4. Cost Savings - Reduce energy costs through efficient energy production and storage.
Implementation:
The system will be implemented in phases, with:
1.Design and Planning - Detailed design and planning of the system.
2.Installation - Installation of the solar PV array, battery bank, diesel generator, and power
distribution system.
3. Testing and Commissioning - Testing and commissioning of the system to ensure optimal
performance.
SYSTEM BLOCK DIAGRAM
GENERATOR
PV PANELS
INTEGRATION
GRID