Experience

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 is currently 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.