• customer
    Siemens AG, Germany
  • end customer
    Transpower, New Zealand


After 45 years the 'Pole One' equipment of the Benmore substation in the South Island and the Haywards substation in the North Island of New Zealand is replaced by latest thyristor valve units. This will expand the power transmission capacity from 900 MW to up to 1,200 MW.
Within the new converter system, known as 'Pole Three', our ipConv gateways are used as RCI (remote control interface) between the superordinate control station and the substations.
The implementation of the protocol stacks DNP V3.00, Slave, DNP V3.00, Master, TASE.2, Server, TASE.2, Client, Modbus, Master, Simatic TDC, Master and Simatic TDCR, Slave enables the intercommunication between all connected devices.
Our industrial pc IPC191V3 19" 1U is used as hardware platform.
The Ethernet adapter of the embedded controller SEC2 connects the serial interfaces of the protection devices to the local net.
The gateways operate redundantly in "hot standby" mode. This means only one of the two devices is active at any time. The passive device monitors the active one and if the active one fails, the passive one automatically steps in and resumes communication.

Inter Island Connector Pole 3

Siemens Energy has received an order from Wellington-based Transpower New Zealand Limited, the national grid operator, to modernize and increase the capacity of the existing high-voltage direct-current (HVDC) link between the country’s North and South Island. For the "Inter Island Connector Pole 3" HVDC project Siemens will supply two turnkey converter stations and replace the aging converters with advanced light-triggered thyristor valves. The aim is to raise the capacity of the existing HVDC system in increments over the next few years from 700 megawatts (MW) to 1400 MW. This is intended to ensure reliable power supply with minimal losses and to further stabilize New Zealand’s grid.
(Extract from the Siemens trade press information, Erlangen, November 10, 2009)

Further information: HVDC Pole 3 Inter-island Link Project factsheet: November 2010

Used Products

  • ipConv

    Universal protocol converter for highest degree of flexibility

  • ipConvLite

    inexpensive protocol converter for standardized application

Used Protocol Stacks

DNP V3.00, Slave

DNP V3.00, Master

TASE.2, Server

TASE.2, Client

Modbus, Master

Simatic TDC, Master