Monitoring and control

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What is electrical distribution management system

 

Electrical distribution management system is a modern software solution that monitors, controls, and optimizes electrical distribution networks. Integrated with a comprehensive electrical control and monitoring system, it helps improve grid reliability, enhance efficiency, and reduce downtime.

What it does:
 

  • 100% DSS & 43% consumer substations controlled through the DMS.  

  • Monitoring and control of the electrical network through SCADA. 

  • Load management advanced reporting functions to gain detailed insights.

  • The system ensures redundancy at key servers and uses separate servers dedicated to program development, training, Intelligent Electronic Device (IED) management, and quality assurance (QA) testing.

  • System interconnection with GIS, PI, and transmission SCADA. 

  • System handles 45,000 data points. 

Tata Power DMS: Distribution management system architecture.

 

Features of electrical distribution management system 

 

  • Fault Location, Isolation, and Service Restoration (FLISR)
    FLISR automatically determines, within seconds of detecting a fault, the location of the fault using both fault data available from modern relays and fault detectors. It then proposes switching steps to isolate the fault and restore the distribution feeder upstream and downstream of the isolated fault, thereby rapidly reducing the number of outage customers and dropping the total outage minutes. For fault identification system takes input from field devices such as FPI and LORA.
  • Integrated Volt-VAR Control
    Volt-VAR recommends an optimized set of networks switching to achieve greater efficiency in the distribution network. An important feature of the electrical control and monitoring system, it calculates the predicted values of voltage, active and reactive power, and power factor for a given network. It thereupon suggests a set of networks switching for bringing these values within desired limits. In this manner, it assists in meeting various important objectives like minimizing real power losses, maintaining the voltage profile of the network etc.
  • Optimal feeder reconfiguration
    The optimal feeder reconfiguration application analyses the distribution network and proposes switching actions that will result in better utilization of the distribution assets. Its two modes of operation look to reduce system losses and improve voltage profiles or to reduce overloads.
  • Switching advisor
    Switching advisor determines and proposes switching operations to safely isolate a piece of equipment or portion of the distribution network as part of a work order. 

 

AROGYANCHI DS5-307 monitoring and controlling water distribution network

 

Features of Smart DSS

 

Safety:  This minimizes bundle of wiring in control panel thereby reducing the risk of fire.

Simplified engineering:  1 relay can provide protection for incomer and all outgoing feeders. 

Enhanced flexibility:  The centralized protection and control device has an inbuilt feature of AVR and power quality measurement which avoids additional RTCC panel and cost of PQM.

Switchgear temperature monitoring: Installation of Temperature &humidity sensors in switchgear panels for real time monitoring. 

Improved reliability: Redundant systems and robust cyber security measures for ensuring the stability and reliability of Central Protection and Control systems. 

Remote monitoring and automation: Facilitates remote monitoring and automation, as part of the broader electrical control and monitoring system, enabling better operation and maintenance of the substation.

Merging units: These devices digitize analog signals from current and voltage instrument transformers and transmit them to the Centralized Protection and Control system. 

 

SCADA schematic for substation control and monitoring
MATV system schematic for signal distribution

 

Geographical Information System (GIS) 

 

Constituents of GIS at Tata Power:

EHV network: Routes details of 220KV/110KV network from transmission grid. 

Grid internal: Single line diagram of electrical connectivity.

HT network: Routes details of 33 KV/22 KV/11 KV cable and location of substation and connectivity details. 

LT network: Route details of LV cable and location of feeder pillars, and connectivity details.

Consumer mapping: Details of consumers up to LV level, and location of asset and their connectivity.