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Multilin™ D20/D200 Substation Controllers Simple to Advanced Substation Automation Control The Multilin D20/D200 Substation Controllers offer an industry leading design embedded with high value substation automation applications that provide cost savings, increased reliability, and improved operational efficiencies in electric power substations. The ability to support a wide range of communication protocols and applications, allows the D20 to be interoperable with a broad range of intelligent electronic slave and master devices. The D20 can execute simple to complex local logic, compile and process data [collect and convert] and reports upstream to master stations. The D20’s distributed, expandable I/O architecture and mission-critical automation control applications reinforce why the D20 controller is being used in over 40,000 installations around the world. Key Benefits In a mission-critical substation-hardened package, the D20/D200 provides: • Substation client and server functionalities by maintaining a distributed architecture for gathering and controlling data on substation equipment while sending data to master stations via serial RS-232, RS-485, fibre optic or Ethernet interfaces for point to point, multi-drop and remote connections. • Support for a broad range of SCADA host protocols, IED protocols, Communication options, Input/output (I/O) peripheral modules, and operation and maintenance utilities substation automation applications. Refer to the hardware manual and see the appendix section of this document for more details. Applications Functionalities such as data concentrator, protocol converter or a local automation platform to implement popular distribution automation applications such as capacitor bank control, outage prevention programs, feeder resource optimization and control interlocking inhibition and subgrouping. Functionalities such as data concentrator, protocol converter or a local automation platform to implement popular distribution automation applications such as capacitor bank control, outage prevention programs, feeder resource optimization and control interlocking inhibition and subgrouping. • Data Concentrator Automatically consolidates collected information from intelligent electrical devices (IEDs), such as relays and meters, and communicates to SCADA, EMS, DMS and Data Historian systems • Protocol Converter Translates different data message formats between devices to support interoperability • Local Automation Platform Implements popular distribution automation applications such as capacitor bank control, outage prevention programs, feeder resource optimization and control interlocking, inhibition and subgrouping(https://www.weikunfadacai1.com/)

 

Substation Controller Connectivity The D20/D200 can support a wide range of substation automation communication protocols and enhanced SCADA applications. See Appendix B for a list of supported protocols for both client and server devices. The following summarizes some of the different data translation applications that are equipped in the D20/D200. Multilin D20/D200 Data Translation Applications User Programmable Logic: • LogicLinx™ module: IEC61131-3 compliant PLC-type logic with full support for 5 programming languages • Calculator module: Soft logic utility to perform mathematical and logical operations Generation, Transmission, and Feeder Bay Automation Applications: • Automatic Voltage Control module: Maintains steady voltage base on user-defined targets and settings • Local / Remote Data Translation module: A master local/remote switch to control the local/remote state of distributed devices • Secondary Master Trip/Close module: Enables the use of individual relays (with external terminations) as master trip/close relays • Set-point Adjustment module: Adjust set points based on control request durations or analog input values • Tap Position Indication module: Translates status points into scaled analog input values to reflect transformer tap positions Distribution Automation Applications: • Auto Reclose: Automatically reclose tripped circuit breakers following momentary faults • Automatic Restoration: Patented load transfer scheme isolates faults and restores power to non-faulted sections if possible • Distribution Capacitor Control Algorithm: Improves reactive support during peak periods through more effective use of existing capacitor banks • Fault Localization: Locates and isolate faults to reduce customer outage times •(https://www.weikunfadacai1.com/)

Load and Dead Bus Transfer: Monitors a network of substations and move load off overloaded transformers to other stations as required • Load Shedding/Curtailment: Sheds load intelligently during overload conditions Data Logging / Storage Applications: • SOE Local Logger: Logs digital and analog SOEs to an external printer, PC or to a CSV file • Accumulator Freeze: Coordinates freezing of accumulator groups • Event Storage: Stores history of current values, status, and time-tags of analogs and accumulators for up to 7 days • Historical Analog: Stores averaged historical values for up to 8 analog inputs Communication Services Applications: • Communication Watchdog: Monitors and report the health of communications • Substation Maintenance: Suppresses SCADA point reporting during substation maintenance • Virtual Terminal: Directs remote access to connected devices • Line Switch: Monitors main and secondary communication channels and retransmits on a third channel • LAN Services: TFTP, SPT Server/Client, Time Server/Client • COM Statistics: Records a detailed communication pass/fail statistics • IRIG B Source: Time sync connected devices using IRIG-B • SNTP Client: Time sync over an Ethernet LAN Data Reduction and Summarizing Applications: • Analog Reference: Monitors analog input hardware for good or bad reference values • Data Change Detect: Toggles a status point every time any data in a configured group changes • Alarm Prioritization: An alarm filter designed to manage the 3 level alarms reported by GE’s DART pole-top/pad-mount distribution RTU • Analog Averaging: Averages analogs at regular intervals • General Alarm: Groups alarms together to create summary alarms • Top of Hour (TOH) Analog Averaging: Averages analogs at regular intervals relative to the top of the hour • Redundant I/O: Provides data from a backup source if the primary source is off-line Data Conversion Applications: • Digital-Analog Value Conversion: Converts digital input groups to analog data using binary, BCD, or gray code encoding • Digital Input to Counter: Counts the number of SOE or COS transitions on status points • BCD Setpoint: Translates analog output requests into a group of BCD encoded control points • Accumulator Delta to Analog: Converts accumulators to analog values for protocols that do not support counters • Time Stamp: Interprets each bit in an analog input as a status point, and create SOEs appropriately • Analog to Digital Conversion: Converts analog inputs into groups of binary coded control outputs • Mailbox: Converts analog outputs into analog inputs so they can be read by all masters

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