Siemens has won a $17.5m contract to supply systems to the largest solar plant in Vietnam.
The 258 MW plant in the southern province of Ninh Tuan is operated by Vietnam’s Trung Nam Group and marks the first solar project for Siemens in southeast Asia.
Siemens will deliver inverters, power and distribution transformers, gas-insulated medium-voltage switchgear, circuit-breakers, and a monitoring and control system.
The deal also includes all the electrical engineering components needed to equip a photovoltaic plant.
Stephan May, chief executive of Siemens’ Medium Voltage and Systems Business Unit, said: “We are proud to be able to offer the best solution that will play a vital role in supporting the energy transformation in Vietnam.”
The solar panels will generate a combined DC voltage of 1500 volts. Inverters will convert the DC to 660 V AC, and transformers will first step this up to 33 kV and then to 220 kV. This will then be fed into the high-voltage grid and the power distributed around the country.
Siemens said the components needed up to the 33 kV level are designed as a ‘plug-and-play MV station’, and can therefore be installed as a standalone unit without major construction cost.
Trung Nam Group is an investment company for the energy, infrastructure and real estate sectors. Its general director, Nguyen Tam Tien, said: “Vietnam’s need for energy is rapidly growing. To cover this demand, we must increase the share of renewables, among other things. The government is aiming at developing 18 gigawatts of generating capacity by 2030. Siemens is supporting us with our solar project so we can reach the government targets for developing renewable energy in Vietnam.”
The four power transformers used in the Trung Nam project are to be delivered as ‘Sensformers’. Siemens explained: “As transformers are placed at critical nodes of the power grid, they are perfect sensors for grid conditions containing full information on energy flow. This new transformer class merges physics and information and equips transformers with a digital interface. This allows the operator to view its data in real-time – turning transformers into information hubs.”