Services for High-Voltage Direct Current (HVDC)

We provide availability of up to 99 % for high-voltage DC transmission

Contact us

Ensuring reliable high-voltage DC transmission for decades

Siemens Energy high-voltage direct current (HVDC) transmission has proven its high performance and reliability for many years. Nevertheless, during the long lifecycle of HVDC, various services are required to support its optimalfunctionality and the economically safe operation throughout the years.

Comprehensive services for all kinds of HVDC

Bringing energy from remote renewable energy generators to consumers and providing compensation for regional fluctuations in the production or consumption of electricity thanks to trans-national grid connections: HVDC transmission operators have to make sure their system provides the highest availability, performance, and efficiency at all times. One pillar to fulfill this challenge is our best-in-class HVDC hardware and software, but that alone is not enough to guarantee efficiency, security, and reliability for decades. Your system also needs regular maintenance, modernization, security checks and updates.

Siemens Energy can provide you with comprehensive services to increase the transparency of your HVDC system as a prerequisite for optimization and to ensure continuous availability as well as the highest possible performance.

Are you looking for preventive and corrective maintenance, sophisticated spare parts management, and modernization or retrofitting of older systems? If so, we will be at your side with our specific HVDC know-how and a wide-ranging service portfolio to ensure a highly available, secure, and cost-efficient HVDC operation as well as compliance with environmental and safety regulations.

Highlight services for HVDC at a glance

Siemens Energy offers you a wide range of individualized services for your HVDC system, including our cyber security services for reliable and secure HVDC systems of the future

Comprehensive services for your HVDC system

From reactive to proactive services, from repair and spare parts to service programs – our service portfolio for all kinds of high-voltage DC systems covers everything you need to keep your system up and running efficiently and up to date. See comprehensive details for our HVDC services below.

Maintenance contracts

  • Preventive/scheduled maintenance work according to OEM recommendations
  • Qualified local expert personnel
  • Increase asset reliability and lifetime expectancy


Computerized maintenance management system

  • Software/hardware package for maintenance planning and controlling
  • Specific work orders with detailed work procedures
  • Detailed resource planning and expert selection


Field service and repair

  • Fast response by qualified local service experts
  • Access to our global network of experts for additional support
  • Minimized outage time


Spares Consulting

  • Individual consulting solutions for new strategic & operational spares as well as for already existing customer spares


Spare parts management

  • Provision of high-quality spares across all applied technologies and asset generations
  • Reliable global supply of single parts, parts kits and complete spare modules for planned and unplanned maintenance measures
  • Managed spares service models


Obsolescence management

  • Provision of detailed information (internal/external) on obsolete parts and products in our globally installed base
  • Recommendations for remedial action, including retrofits, modernizations, last calls for replacement spares or disposal


Modernization and retrofit

  • Software/hardware to prolong your HVDC assets lifetime, support and spare parts availability
  • Minimized downtime and greater availability
  • Handling new technology requirements



  • Overhaul of HVDC equipment to prolong its lifetime and increase its availability
  • High-quality work according to OEM standards
  • Dedicated functional testing according to industrial standards before re-installation


Upgrade and update

  • Update your HVDC system with state-of-the-art solutions to improve asset efficiency and performance
  • Implementation of new features and functionality
  • Complete functional testing of new systems



  • Extension of your existing HVDC assets according to growing demand and needs
  • Proven adapter solutions if required
  • Bypass solutions etc. to reduce outage time during installation of extension


Condition monitoring and diagnostics

  • Monitoring of your most critical HVDC assets
  • Analysis of dynamic asset conditions allows operation of your HVDC assets up to real-time rating (asset performance management)


Remote services

  • Our dedicated Customer Support Center automatically identifies critical situations
  • Experts conduct remote analysis and give recommendations
  • Reliable and secure data connection


Cyber security

  • Security concepts and patch management
  • Compliance with NERC CIP and BDEW white paper standards


Qualification and training

  • Customized trainings and continuous qualification of your service personnel in terms of HVDC
  • Classroom, test field, and onsite trainings
  • Experienced engineers as trainers


Technical support/hotline

  • Immediate 2nd and 3rd level technical senior expert support via telephone (24/7h or 8/5h)
  • Utilization of internal engineering department
  • Coordination with key sub-suppliers


Technical support via remote access

  • Online failure analysis via Common Remote Service Platform (cRSP)
  • Access to experts regardless of location
  • Secured remote access to your HVDC systems


On-site condition assessment (“Health Check”)

  • On-site HVDC asset evaluation and testing 
  • Detailed condition report and early warning indication 
  • Recommendation plan for availability improvement and lifetime extension


Asset management and advisory services

  • Vendor-independent consulting and forecasting of HVDC asset health and risk
  • Software and consulting services enabling you to optimize asset management (OPEX, CAPEX)



  • Carefree, complete HVDC system operations by qualified Siemens Energy employees
  • Utilization of operational best practices gained through many of our systems around the globe
  • High performance and availability through on-site experts


Warranty and availability guarantee extensions

  • Extended asset warranty
  • Individually-fixed availability ratings
  • Customized agreement on bonus/malus system
  • Reduced risk for return on investment


Service programs

  • Operation and maintenance services and Individualized “care-free packages” 
  • Guaranteed performance by defined KPI’s
  • Special service projects, customer support, operation, maintenance, and management services


Transmission Service Portfolio
PDF (224 KB)

HVDC services on all continents

We successfully deliver fast, competent, and reliable product support for high-voltage DC transmission to all corners of the earth.