Over the past decades, remote terminal units (RTUs) have been the primary equipment for data acquisition, monitoring and control in power substations. RTUs play a key role in providing information for power system operation.

Specifically, the D20 RTU manufactured by GE (formerly Westronic in Canada) has been the substation RTU chosen by many power utilities since the late 1980s. To date, many of these D20 RTUs are still operating in stable and reliable conditions. However, D20 users need to address numerous new challenges to meet their utility business objectives.

Challenges and needs
• Future plans for D20 RTU
• Ability to integrate new applications
• Open platforms for additional applications
• IP-based protocols and networking capability
• DNP3 over IP communication
• IP-based remote access for maintenance and diagnostic
• Visualization of substation information
• Cyber security enhancement
• Practical migration path to Smart Substation for enabling Smart Grid

Solution
DAPmini™ server is designed and developed to address these challenges and needs. DAPmini™ server is a non-disruptive, plug-and-play migration solution that upgrades existing D20 RTUs in operation.

Benefits
• Industry standard based technologies
• Minimal or no hardware and software changes to D20 RTUs
• Minimal engineering, testing and re-commissioning of D20 RTUs
• Minimal outage time
• Practical, low risk and cost effective

For more information on D20 Upgrade please contact us.