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D90Plus Line Distance Protection System |
Reduce investments in lifetime costs, engineering, installation and commissioning with the D90Plus' integrated protection, control, automation and monitoring features in one easy to use package. The D90Plus is designed to cover a wide range of applications, from simple three-pole distance protection to high speed sub-cycle distance protection with single pole tripping and pilot communication schemes.
What's New in the D90Plus
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Sub-cycle Distance Protection
- Sub-cycle Quadrilateral characteristic for applications where this characteristic is preferred over the Mho characteristic
- True digital CCVT filter to remove voltage transients introduced and provide accurate voltage information for distance protection - requires only three relay settings
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Cyber-Security
- Enabling NERC/CIP compliance
- Dual Permission access requiring live permission from both the user and from SCADA operators before settings can be changed or commands can be given to the relay
- Remote and Local Setting and Control passwords
- Configurable lockout responses to unsuccessful password access attempts
- Successful password access logged in Events Record
- Logging of user commands in the Security Audit Trail Report - creates a record and sequence of events log for troubleshooting and security auditing
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High-Density I/O Options
- New high density I/O option modules featuring either 23 optically isolated inputs or 12 Form-A outputs<
- Ideal for applications like bay control and monitoring, where a large number of additional I/O are required
Ambient Temperature Monitoring
- Provides alarms when the ambient temperature exceeds hot extreme
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Software Ease-of-Use
- EnerVista Viewpoint Engineer now available for graphical configuration of Protection and Automation FlexLogic™
Applications
Primary protection of HV and EHV circuits that require sub-cycle tripping times and single/three pole reclosing in order to maintain system stability and NERC loadability limits
Primary protection of MV and HV circuits with three pole tripping and reclosing with or without pilot communications
Backup protection for generators, incorporating the recording and monitoring functions needed to comply with upcoming NERC requirements at generating facilities
Features and Benefits:
Protection & Control
Protection designed to allow reduced critical clearing times and increased line loading for constrained transmission systems -
Distance protection algorithm providing secure sub-cycle tripping for a wide variety of faults and system conditions
Five zones of Phase and Ground Distance of mho and quad with independent compensation settings for in-zone power transformers -
True digital filter to remove CCVT transients and prevent distance element overreach without introducing intentional delays or reducing fault coverage
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Breaker failure reset times of 5/8 of a power system cycle
Out-of-step tripping and power swing blocking Wattmetric zero-sequence directional power Single/three-pole Four-shot dual breaker auto-recloser User-programmable Protection FlexLogic™ for custom protection schemes executed every 1 ms
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| 12 pre-configured bay single line diagrams and corresponding controls for bay equipment |
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Phasor display of sequence components showing the standing unbalance in the line |
Automation
Advanced Automation FlexLogic™ user-programmable logic engine, completely independent from Protection FlexLogic™
Control functions for advanced load shedding, load restoration and dynamic volt/var control schemes
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High density I/O options ideally suited for applications, such as Gas Insulated Stations, that require a large number of status inputs and outputs
Monitoring & Metering
Metering functions ranging from basic system metering to Data Logging and Synchrophasors as per IEEE C37.118
High resolution, fast scan (128 samples/cycle) transient recorder, featuring 30 second storage capacity and 10 microsecond time stamp accuracy
Disturbance/Swing recorder with 5 minutes of recording capacity to record long-duration events like power swings, voltage sag and swell and trending
Sequence of Events recorder - 8000 time tagged events, with 0.5 ms scan of digital inputs
Communications
Supports the following industry standard protocols for easy, direct integration into DCS and SCADA systems: IEC 61850, DNP 3.0, IEC60870-5-104, Modbus
3 independently configurable IP addresses, supporting independent engineering access and Single/Dual IP redundancy for various communications architectures
User Interface
Digital Annunciator - configurable color LCD annunciator for custom alarms
HMI for display and control functions
Comprehensive data visualization
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User programmable diagrams for bay monitoring and control
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Pre-programmed single line diagrams for common bus configurations, including ring-bus, double breaker and breaker-and-half configuration
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Pre-programmed comprehensive displays for Metering, Bay Control, Fault Reports, Sequence of Event Reports, and Real Time Phasor Displays
Security
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Remote and Local Setting and Control passwords
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Dual Permission Access Control
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Configurable lockout responses to unsuccessful password access attempts
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Successful password access logged in Events Record
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Security Audit Trail Report keeps track of relay configuration changes and commands executed
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