Distributed Management System and SCADA

Switching Distributed Management System and SCADA


► Paperwork

► Manual processes

► Software systems are not fully integrated

► Most Unplanned outages are reported by customers


► Near real time data

► Automated process

► Integration with many systems

► Faster outage restoration times

► Improved outage


Integrated OMS/DMS – Key Benefits Today

►Reduce outage time through integration with Smart Meter technologies, SCADA, and customer calls with GIS based model

►Reduce outages time by improving the utilization of response personnel

►By taking advantage of mobile terminals in the field and automated generation and testing of switching plans

►Improve real time reporting of current outages for patrons and management personnel

►Improves the management of resources during the major events to more quickly restore the services to customers and better predict and communicate restoration times

 OMS/DMS: Project Scope

► Unplanned Outages

• Implement Oracle Network Mgmt System (NMS)

• Integrate AMI & SCADA & Customer involves outage detection and prediction of interrupting device

• Utilize GIS ESRI model into NMS model

• Use NMS for restoration of steps in including SCADA operations

• Use PING function to confirm outage status

► Distribution Management

• Use the system Real Time As-Switched Model of Distribution System

► Major Events-Storm Module

• Aggregate Assessment of the and the Repair Status for All Outages

• Estimate Overall Restoration of  Time and What-If Scenarios

OMS/DMS: Project Scope – continued

► Planned Switching

• Simplify Field Requests for scheduled work switching

• Facilitate communication with customers for planned outages

► Outage Communications

• Implement Obvient’s focalPoint

• Provide real time stats on current outages – customers impacted and ETR status

• Provide primary & secondary outage whiteboards

• Provide status of repair jobs during storms

• Provide outage maps

• … and many more

OMS/DMS Smart Grid Inputs

• Smart Meter/AMI

– Historical Transformer of the Load Profiles to support power flow calculations

– Power Off Alarms – to detect outages

– Power On Alarms – to verify restoration

– Status Pings – to verify outage predictions and restoration


– Dynamic ratings for substation transformers

– Substation Alarms and Analog (e.g. oil temperature) Information


– Device Status (Open/Close)

– Alarms and Analog (e.g. load and voltage) Information

– Fault Indication and Fault current

• Wireless Fault Indicators

Positive Effects of AMI

• Fuse Outages are predicted earlier

– (10 minutes 1st call, 25 minutes same prediction)

• Service Connection problems have been identified and resolved

Real Time as-switched view of distribution system. Integrated with AMI to more quickly detect outages. Average of 10 minutes before first customer call and 25 minutes before customer calls would be predict same outage location for non SCADA outages. Integrated with mobile dispatch of smart system to dispatch work and track crew status. Overall Summary of outages in progress and historical trend of outage and restoration activity customer Road and Aerial Views of outage area. Location of outage devices and as distribution transformers Indication of where calls are received Integrated with SCADA for real time analog and standing information. Distribution feeder as power flow forecast calculated using real time SCADA reads and transformer profiles built from historical AMI data

there has a Real Time view of Substation with breaker status, reclosing status and SCADA measured currents. 

Current Information for Circuit:

• Load Details for all SCADA devices

• Tie Point load and capacity

• Capacitor settings

OMS/DMS Smart Grid Applications Future Capabilities

► Use as power flows calculations and real time modeling for unplanned and planned outages

► Self Healing grid – automatically detected as outage, determine fault locations and switched to isolate the fault and restore customers – FLISR

► Load Balancing – determine the overloaded circuits, provide switch plans customer to balance the load and execute switching to balance load

► Volt/VAr Control – determines out of tolerance Volt/VAr conditions, provide the recommended settings for LTC/Voltage Regulators and


► Fault locating at analysis using the circuit model and fault currents

► Automations of reliability the reporting to accurately calculate the scope and duration of outages

Drivers – Advanced DMS

The limitations of DMS Powerflow (PF) – Basis for DMS applications. If PF is incorrect, the following

DMS applications are incorrect:

• NMS Version 1.10: Power flow for model doesn’t utilize Distributed Energy

Resources (DER’s) characteristics

• the NMS Version 1.12: Power flow model will utilize DER’s characteristics

OMS/DMS Keys to Our Success

• Across the Organization – Vision Agreement on Desired Capabilities of different.

• Knowledgeable and Committed Business Team, Electric Operations Members, and Information Technology Members

• Strong Teamwork – Key Members Located Together

• Extensive training across organization

• Rigorous Testing on Functionality and Integrations

• Extensive Pilot with Key Systems Integrations

• Good Vendor Products and Cooperation

• It’s Ready When It’s Ready!


  •  It is a technique used in transmitting and receiving the data information or data over a medium.
  •  The information can have measurements, such as voltage, current, breaker status, transformer tap position etc..
  •  These data has been transmitted from one location to another location through a medium such as cable, telephone line or radio wave.
  •  Information may come from multiple locations. A way of addressing those different sites is incorporated in the system. 

Conventional Approach:

• Additional transducers requirement

• Not substantial data for detail analysis

• Complicated hard wiring problems due to additional requirement of spare contacts

IED approach :

• Operation data for SCADA system Centre for network monitoring and control

• Equipment condition monitoring data for maintenance planning

• Remote distance relay maintenance and FDR downloading for Protection

• Having capability of metering , control and protection

• Scalability 

SCADA as Foundation Technology……

Objective :

Unmanned operations of SCADA monitoring and operations of all grid stations of TPDDL

• Benefits:

• Chances of manual error has been minimized

• Data is available for analysis

• Restoration of supply takes less time.

• Better monitoring of load shedding feeders

• Application of Tagging

• Energy Audit available for Analysis of losses

• Operation Monitoring reports

• Limit Violation alarms for DC system 

Load Shedding

Objective :

To avoid system overloadingKey Features:

• Manual Load Shedding

• Under frequency

• Transformer Overload

• Tie Line Overload


• Maintenance of Grid Stability

• Revenue optimization in theft prone areas

• Optimized system overloading

• Reduction in MU losses

Availability Based Tariff (ABT)

Objective :

To optimize power purchase cost

Key Features:

• FTP scheduled drawl from NDPL machine

• Importing Scheduled drawl data into ABT application

• DUI – Daily Unscheduled Interchange Report

• WUI – Weekly Unscheduled Interchange Report

• MUI – Monthly Unscheduled Interchange Report

• YUI – Yearly Unscheduled Interchange Report


• Reduction in Power Purchase Costs

• Improving upon margins

• Optimum utilization of sanctioned power

Objective :

To optimize power purchase cost

Key Features:

• FTP scheduled drawl from NDPL machine

• Importing Scheduled drawl data into ABT application

• DUI – Daily Unscheduled Interchange Report

• WUI – Weekly Unscheduled Interchange Report

• MUI – Monthly Unscheduled Interchange Report

• YUI – Yearly Unscheduled Interchange Report


• Reduction in Power Purchase Costs

• Improving upon margins

• Optimum utilization of sanctioned power

Short Term Load Forecasting (STLF)

Objective :

To optimize load prediction for power procurment

Key Features:

• Short Term Load Forecast

• Very Short Term (Tracking) Load Forecast

• Manual Load Forecast

• Forecasts involve weather data as well


• Reduction in Power Purchase Costs

• Allows working within narrow margins

• Optimization of demand schedule

• Inputs for network planning

Distribution Management System

Objective :

 centralized monitoring operations and control for entire as 11KV networks as to assist faster decision making and actions

Key features:

• Increase reliability of power through Central monitoring

• Reduction of the amount of Un served Energy like

• Quick Isolation of major Fault and restoration of supply

• Minimization of technical loss

• improvement in Reactive power management

Benefits of SCADA/DMS

• Quick deciding on interruption as entire information is available at one location

• Reduction in Technical losses

• Precise voltage control/ Capacitor switching/Tap changing

• Monitoring of equipment overloading

• Automatic Load shedding schemes supported real time data

• Historical database for network planning and analysis

• Better assistance to field staff in localizing the major faulty section by using FPIs at DMS stations

• Reduction in the time for fault identification and restoration of systems

• Improvement on reliability & customer satisfaction.

• Increased safety standards

eased safety standards Revenue realization


Commercial loss reduction through optimize Monitoring

Key feature

• To be check Accurate Energy Audits of data availability for L1,L2 and L3 Level.

• Prioritization of Load profile based on customer profile.

• Load shedding at 11KV voltages Level to serve essential services.

Technical Loss Reduction

Objective :

To maintain operational effectiveness

Key Features:

• optimize loading through load balancing Scheme.

• Voltage Regulation/ Capacitor switching/Tap changing

• Monitoring & controlling the Active & reactive power served

Distribution Applications

– Switching Procedure Management (SPM) : Generating Switching Records for Planned /unplanned Work

– Fault Isolation and repair Restoration (FISR) : Generating SPM for crew to execute the plan accordingly for faulty section isolation & service restoration . Restoration of services is done based on losses minimization , customers affected ,

loading/voltage violation index

– Distribution power flow (DPF) : It is a tool on line Estimated load flow & technical loss

– Volt/Var Control (VVC): voltage estimation on each node of voltages Additional Applications : Jumpers, Grounds and Temporary Connections (JGC)

Optimal feeder reconfiguration (OFR)

Communication Topology:

• Six Rings covering all Grid Substations

• Core ring -2Gbps, Sub ring -566 Mbps

• Serves the both of the Operational (SCADA) and Enterprise and (SAP, Billing, GIS, Internet etc.) Networks

• Consists of

• TTSL Laid Fiber: 70 kms

• Buried Patch : 21 kms

• OPGW: 80 kms

• Advantage of using TTSL Network

• Available in the densely populated area

• Covers 40% of total requirement

• Covers 14 out of 42 grids

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