Transmission & Distribution Protection

Transmission & Distribution Protection

Comprehensive Protection & Coordination Analysis Software

T&D System Protection Insight, System-Wide Coordination
StarZ™ transmission and distribution system protection & coordination software offers insight into line protection, protective relay performance & evaluation, troubleshooting false trips, and system-wide protective device operation.
Transmission system one-line Diagram showing Distance relay protection
  • Evaluate & Verify Protection & Coordination
  • Reduce Human Error in Relay Settings & Logic
  • Simulate Model-Specific Protection Settings & Functions
  • Protective Relay Performance & Evaluation: Distance, Overcurrent, Directional, Differential, Load Encroachment functions and more.
  • Advanced Power Flow & Fault Analyses for Unbalanced Network
  • Use Real-Time Operational Data for System Evaluation
  • Virtually Animate Sequence-of-Operation of Protective Devices

Distance Relay Protection & Coordination Software

  • Accurate & realistic distance relay modeling
  • In-depth performance evaluation of impedance / distance relays
  • Plot R-X characteristics & seen impedances
  • Graphical tool for setting verification & protection coordination
  • Intelligent alert viewer to identify & resolve setting & logic errors
  • User-editable scheme logic
  • Intuitive relay setting editor
  • Comprehensive relay library
Distance relay characteristic plot

T&D Protection & Coordination Software

  • Simulate the actual analog and digital I/Os
  • Detail graphical modeling of Protection & Control system (P&C)
  • Support Group Settings & relay scheme logic
  • Data communication between relays
  • Local & remote backup protection
  • Breaker failure & relay communication
  • Protective Device Sequence-of-Operation
  • Fault insertion between CT, VTs and CBs
  • Primary & secondary relay settings based on actual model
  • State Plots to validate protective device settings & scheme logic
  • Supports single-phase system & train applications
Distance Relay RX characteristic plot

Single / Sliding Fault & Line Loadability Analyses

  • Single fault analysis for unbalanced networks
  • Sliding fault analysis
  • Unbalanced load flow & transmission line loadability analysis
  • Multiple fault locations & resistances analysis in one-click
  • Series compensated line evaluation with MOV action
Distance Relay Sliding Fault On One-line Diagram

State Plots & Device Setting Reports

  • Time state plots
  • Time Distance Characteristic plots (TDC)
  • Time Distance-Resistance Characteristic plots (TDRC)
  • Plot status of I/Os vs. a range of fault locations & resistances
  • Detailed device setting reports
  • Export relay settings to xml & Excel formats
Interactive Result Viewer

Transmission & distribution system protection software provides an intuitive and logical approach to R-X element characteristic analysis with features and capabilities such as an easy-to-use graphical user interface, accurate protective device modeling, relay and device settings report creation, and integrated power system analysis modules.

Transmission system one-line diagram showing a double-bus configuration
The distance relay program provides the protection engineer the tools to examine the performance of protective relay functions including: overcurrent, differential, distance, directional, load encroachments, scheme logic, analog / digital interfaces to instrument transformers, circuit breakers, isolator switches and other protective devices.

The innovative design of the impedance relay / distance relay protection module and library allows the user to access the relay settings and simulate the actual analog / digital interfaces, setting groups, relay logic and more.
StarZ™ - T&D Protection & Coordination

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