Load Flow
Load Shedding
Power Factor Control
Switch Order 		  DAS Map
Automatic Voltage Control
Disturbance Analysis
Load Management 		  Distribution Automation
 - Real-time applications
- Engineering applications
XpertSim training simulator
 
Distribution Automation: Real-time Applications
- Topology Processor
- Distribution Power Flow
- DAS Map
 - Capacitor Bank Control
- Fault Detection, Isolation and Restoration
- PRISM Visualization

Topology Processor

Topology Processor (TP) identifies a network configuration based on the network connectivity model and dynamic switch status. It produces visual and modeled indications of the energized and de-energized areas of the distribution system for display and analysis purposes. In addition, it provides visual tools to distinguish devices that are supplied by different feeders.

Tracing starts from a given node and a branch. The tracing continues by taking the next node of the branch as the new node, and one of the branches connected to the new node (except the current branch) as the new branch. This process is performed recursively until it either reaches an open switch (a break point) or all devices have been reached.

Distribution Power Flow

Distribution Power Flow (DPF) computes phase voltage magnitudes for each feeder or network node, as well as phase and neutral currents for each branch (line, switch and transformer). The active and reactive losses on each branch, as well as accumulated total and per phase losses for each substation and feeder, can also be computed. The DPF model uses the Ybus Gauss solution method: sparse Ybus matrix and equivalent current injections are used to solve distribution network equations. This method has a rapid convergence rate, and uses less memory when modeling distribution networks. The DPF model applies a three-phase sequence model that converts unbalanced three phases into positive, negative and zero sequence phases. (The same model is also used in short circuit current computation.)

Capacitor Bank Control

Capacitor Bank Control (CBC) automatically monitors and controls individual capacitor banks in order to minimize overhead feeder losses. It reduces reactive power flows while maintaining voltages and power factors within specified limits. CBC is a real-time application that executes at a user-specified interval (typically every 30 minutes), sending an alarm when a switch fails to operate. It does not allow unbalanced switching to occur if an individual switch fails; a failed switch causes the capacitor bank to be unavailable to the CBC application. CBC also tracks capacitor bank switch operations and alarms when the number of counts exceeds a predetermined quantity over a specified time interval.

You can enable and disable CBC monitoring and control on individual capacitor banks, or deactivate CBC completely. Voltage limit assignments switch operation count rates (maximum counts and time intervals), and accumulated switch operation counts are adjustable for each capacitor bank.

Fault Detection, Isolation and Restoration
  • Automated detection and isolation of phase-to-phase and phase-to-ground feeder faults

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  • Restores primary and secondary feeder sections

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  • Re-routes de-energized feeder sections to alternate power sources

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  • Dispatcher-activated return to pre-fault configuration
Fault detection, isolation and restoration (FDIR) software detects, isolates and restores service in radial or open-loop distribution systems with 1-, 2- or 3-phase feeder sections. The application runs on the distribution automation system (DAS) from Advanced Control Systems and provides several fundamental control functions. The total time requirement for FDIR to complete all the necessary actions from the moment the fault is detected to the display of feeder re-energization data at the dispatcher console is less than 20 seconds.

Product overview in pdf format
Contents © 2008 Advanced Control Systems, Inc. All trademarks are the property of their respective owners.
This site last updated: 30 September 2008.