Experience

Amongst others, we have gained extensive experience in electrical engineering complex problems solving.

Subira Consulting Engineers & Projects has been a wealth of experience in the Energy Sector, with a team that has over 88 years of combined engineering experience with focus on the Eskom, Municipalities Grid Connection Works and Renewable Projects Solar PV, Wind and BESS Balance of Plant Engineering Scopes and specialising in the following:

Engineering Designs - Full Electrical, Civil & Mechanical designs for Substations, Overhead Power Lines, Reticulation networks for Wind Farms and Solar PVs, Wind Farm Designs, Solar PV Designs, Access roads, Drainages.

Design reviews as Owners Engineers - Electrical & Civil engineering designs for Electrical Substations, Overhead Power Lines, Reticulation networks for Wind Farms and Solar PVs, Wind Farm Designs, Solar PV Designs, Access roads, Drainages.

Electrical Power Plant Engineering (Primary Plant) - High Voltage (HV), Medium Voltage (MV), Low Voltage (LV) (full electromechanical scope)

Electrical Secondary Plant Engineering (PTM&C) - Power System Protection, Telecommunications, Metering, & Control and SCADA System Design for Substations and Power Plant (Solar, Wind and BESS)

Civil Infrastructure and Structural Engineering (Substations & Renewable Plants) - Design, approval and management of civil works e.g. foundations, roads, buildings, structural works including inspections and construction support.

Site supporting during Manufacturing and Construction - Putting together Manufacturing quality control plans, Inspection Test Plans, Witnessing and conducting Factory Acceptance Testing (FAT) and Site Acceptance Testing (SAT).

Delivered solutions

Transmission and Distribution electrical engineering complex problems solving
Distribution Substation design
Power Distribution Systems
Planning of Electric Power Distribution
Quality of Supply/ Power Quality
Performance Monitoring, management of Quality of Supply
Quality of Supply Apportionment or emissions allocation
Trend and analysis of root causes of Power Quality events

Network improvement and reliability, reporting annually to NERSA on Power Quality performance for Transmission and Distribution Divisions, monthly reporting to Eskom Transmission and Distribution divisions on Quality of Supply performance
Quality of Supply investigations and Consulting in Transmission and Distribution
Project Management, Technical Leadership, Mentoring
Renewable Power Plants Grid Code Power Quality compliance reports evaluations for Transmission and Distribution
Renewable Energy projects (Solar PV, Hydro and Wind Energy)
Grid Code Compliance

Power Quality/ Quality of Supply management and improvement
Commissioning of new plant technologies
Transmission Overhead Power Lines - Maintenance and Line Inspections.
Power Transformers and Reactors Technical Investigations of plant trips and failures and Specifications of new transformers & reactors.
Power Transformers - Health Condition Assessment and Analysis, Design verification using calculations, and Factory Acceptance Testing results verifications.

Subira Consulting Engineers was contracted to provide Grid Code Compliance services to the following PV Plants in order to satisfy all the South African Grid connection requirements for renewables plants, according to Grid Connection Code for Renewable Power Plants (RPPs) Connected to the Electricity Transmission System (TS) Or the Distribution System (DS) In South Africa – Version 2.9, July 2016. This was successfully achieve in collaboration with Mattla Engineering Solutions. Site Measurements with the plants in full operation were taken and used for assessment of some of the Grid Code requirements. Simulation studies were also conducted on the as built simulation models to also assess some other Grid Code requirements that can’t be measured.

SCATEC SOLAR (PTY) LTD - LINDE SOLAR PV PLANT
The Scatec Linde Solar PV Plant is situated in the Northern Cape Province of South Africa. Linde PV Plant has a Maximum Export Capacity (MEC) of 36.8MW. The Point of Connection (POC) of the plant is at the 132kV Mangoose Switching station, which is also the Point of Common Coupling.

The plant consists of forty-three (43) SC 850 CP SMA Sunny Central solar inverters. The SC850 inverter is rated at 850kVA Nominal (and 935 kVA at 110%) continuously at ambient temperatures below 40°C. The forty-three (43) inverters are connected in pairs to the medium voltage system through three-winding 1800kVA-0.405kV/22kV transformers, with one inverter connected through two-winding 900kVA-0.405kV/22kV transformer. The 22kV collector network is stepped up through 2x20MVA transformers to 132kV at the POC.



SCATEC SOLAR (PTY) LTD - KULKBULT SOLAR PV PLANT

The Scatec Kalkbult Solar PV Plant is situated in the Northern Cape Province of South Africa. The Kalkbult PV plant has a declared installed generation capacity of 72.5MWe. PV Plant has a Maximum Export Capacity (MEC) of 75MW. The Point of Connection (POC) of the plant is at the 132kV Antelope Switching station, which is also the Point of Common Coupling.
The plant consists of eighty-four (84) SC 800 CP SMA Sunny Central solar inverters. The SC800 inverter is rated at 800kVA Nominal (and 880 kVA at 110%) continuously at ambient temperatures below 40°C. The eighty-four (84) inverters are connected in pairs to the medium voltage system through three-winding 1600kVA-0.36kV/22kV transformers. The 22kV collector network is stepped up through 2x40MVA transformers to 132kV at the POC.

SCATEC SOLAR (PTY) LTD - DREUNBERG SOLAR PV PLANT
The Scatec Dreunberg Solar PV Plant is situated in the Eastern Cape Province of South Africa. The Dreunberg PV plant has a declared installed generation capacity of 69.6MWe. PV Plant has a Maximum Export Capacity (MEC) of 75MW. The Point of Connection (POC) of the plant is at the 132kV Sable Substation, which is also the Point of Common Coupling. The plant consists of eighty-one (81) SC 850 CP and one SC 760 CPSMA Sunny Central solar inverters. The SC850 inverter is rated at 850kVA Nominal (and 935 kVA at 110%) continuously at ambient temperatures below 40°C. The SC 760 inverter is rated at 760kVA. Eighty (80) inverters are connected in pairs, with one (1) stand-alone inverter, to the medium voltage system through three-winding 1800kVA-0.405kV/22kV transformers, while one (1) is connected through two-winding 800kVA-0.36kV/22kV transformer. The 22kV collector network is stepped up through 2x40MVA transformers to 132kV at the POC.
Subira Consulting Engineers was contracted to provide Grid Code Compliance services to the following Wind Farms Plants in order to satisfy all the South African Grid connection requirements for renewables plants, according to Grid Connection Code for Renewable Power Plants (RPPs) Connected to the Electricity Transmission System (TS) Or the Distribution System (DS) In South Africa – Version 2.9, July 2016. This is in collaboration with Mattla Engineering Solutions. Site Measurements with the plants in full operation are currently being taken and will be used for assessment of some of the Grid Code requirements. Simulation studies are also being conducted in parallel on the as built simulation models to assess some other Grid Code requirements that can’t be measured.

LONGYUAN MULILO DE AAR WIND POWER (RF) (PTY) LTD - LONGYUAN MULILO DE AAR MAANHAARBERG WIND ENERGY FACILITY
The Longyuan Mulilo De Aar Maanhaarberg Wind Energy Facility is situated in the Northern Cape Province of South Africa. The Longyuan Mulilo De Aar Maanhaarberg Wind Energy Facility has a declared installed generation capacity of 96.48 MWe. The Wind Plant has a Maximum Export Capacity (MEC) of 100 MW. The Point of Connection (POC) of the plant is at the 132kV Phiri Switching Station, which is also the Point of Common Coupling. The Wind Energy Farm (WEF) consists of sixty-seven (67) UPC UP86 Wind Turbine Generators (WTG) rated at 1.5MW continuously at ambient temperatures below 40°C. The sixty-seven (67) WTGs are connected to the medium voltage system (collector circuits) through dedicated two-winding 1800kVA-0.39kV/33kV transformers. The 33kV collector network is stepped up through 2x60MVA transformers to 132kV at the POC.

LONGYUAN MULILO DE AAR WIND POWER (RF) (PTY) LTD - LONGYUAN MULILO DE AAR 2 NORTH WIND ENERGY FACILITY
The Longyuan Mulilo De Aar 2 North Wind Energy Facility is situated in the Northern Cape Province of South Africa. The Longyuan Mulilo De Aar 2 North Wind Energy Facility has a declared installed generation capacity of 138.96MWe. The Wind Plant has a Maximum Export Capacity (MEC) of 100 MW. The Point of Connection (POC) of the plant is at the 132kV Phiri Switching Station, which is also the Point of Common Coupling. The Wind Energy Farm (WEF) consists of ninety-six (96) UPC UP86 Wind Turbine Generators (WTG) rated at 1.5MW continuously at ambient temperatures below 40°C. The ninety-six (96) WTGs are connected to the medium voltage system (collector circuits) through dedicated two-winding 1800kVA-0.39kV/33kV transformers. The 33kV collector network is stepped up through 2x80MVA transformers to 132kV at the POC.
We deliver quality service in partnership with various stakeholders in the industry.