HVDC facility to be built at Transmission Distribution Centre

14th October 2016
Source: Mitsubishi
Posted By : Anna Flockett
HVDC facility to be built at Transmission Distribution Centre

It has been announced that Mitsubishi Electric Corporation will enter the global market for voltage-sourced converters (VSC) based high-voltage direct current (HVDC) systems with a new HVDC verification facility to be built at its Transmission and Distribution Center in Amagasaki, Japan by 2018.

The company is targeting more than $500m in global orders for HVDC -Diamond systems by 2020.HVDC systems are expected to reduce CO2 through the efficient integration and expansion of renewable energies, such as photovoltaic and offshore wind power. HVDC-Diamond systems will utilise the company’s own High-Voltage Insulated Gate Bipolar Transistors (HVIGBT).

HVIGBT devices are insulated for high voltage and designed for large current ratings to reduce the number of sub-modules, resulting in space and cost savings. The parallel connectivity of the HVIGBT devices in each sub-module allows for a flexible design to meet wide-ranging needs for power transmission capacities in the global market for VSC-based HVDC systems.

HVDC-Diamond will offer high reliability through the use of high speed control and protection systems. Optimised control functions with appropriate hardware configuration will comply with system requirements for stable and continuous operation, even during faults on the AC network such as lightning strikes. Protection systems with high speed response will ensure all equipment can be effectively protected from high currents generated at the time of DC faults within the HVDC system.

There are two types of HVDC systems; the Line-Commutated Converter (LCC) type requires an external power source for commutation, while the VSC type does not. VSC-based HVDC systems are expected to be in greater demand with a more compact footprint as a result of having the innate ability of separately controlling active and reactive power. This advantage allows for applying VSC-based HVDC in weak systems and removes the need for additional reactive compensation from harmonic filters and other reactive voltage support.

Mitsubishi Electric is launching the business of VSC-based HVDC globally in response to the various needs of modern power systems and will implement its verification facility aiming to be operational in the first part of 2018 for the verification of HVDC-Diamond. The global market for HVDC systems, estimated to have been worth about $5bn in 2015, is expected to grow by about seven percent annually.

 


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