Implementing Logic Using the OrionLX · 2021. 1. 23. · Ladder Logic • Use Print Statements to...

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1 NovaTech NC/SC Users’ Group Meeting September 13, 2018 John L. Powell, PE Engineer II Substations and Controls Greenville Utilities Commission Implementing Logic Using the OrionLX Use Cases for Logic at the RTU vs. Master or IED

Transcript of Implementing Logic Using the OrionLX · 2021. 1. 23. · Ladder Logic • Use Print Statements to...

Page 1: Implementing Logic Using the OrionLX · 2021. 1. 23. · Ladder Logic • Use Print Statements to track the code • Timing is everything • IEC6113 –Ladder Logic - May be better

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NovaTech NC/SC Users’ Group MeetingSeptember 13, 2018

John L. Powell, PEEngineer II

Substations and ControlsGreenville Utilities Commission

Implementing Logic Using the OrionLXUse Cases for Logic at the RTU vs. Master or IED

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Introduction

• John L. Powell, P.E.• Substation & Controls, Engineer II• Greenville Utilities Commission

• 252-551-3388• [email protected]

• Responsible for SCADA Integrations with other systems and special projects

• 18 Years of Electric Utility Experience• Prior Experience with Industrial Controls at Procter and Gamble

mailto:[email protected]
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Greenville Utilities CommissionElectric Department

• Serves City of Greenville and about 75% of Pitt County

• Pitt County is about 650 square miles

• Second Largest Municipal Electric Utility in NC

• 66,252 Customer Connections

• 77 miles of 115kV and 34.5kV lines

• 1195 miles of overhead 12kV lines

• 1629 miles of underground 12kV lines

• 22 substations

• 85 miles of fiber optic cable

• Purchase power as a member of NCEMPA

(North Carolina Eastern Municipal Power Agency)

• Founded in 1905

• www.guc.com

17 Miles

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Substation and Controls Group

• Divided into two groups…Engineering and Operations

– 16 Operations and 5 Engineering Personnel

• 22 Substations

– 3 230/115Kv Point of Delivery Transmission Stations (6000MVA of capacity)

– 2 115/34Kv Sub-Transmission Substations (50MVA of capacity co-located with distribution stations)

– 17 115/12Kv Distribution Substations (535MVA of capacity)

– 2 34/12Kv Distribution Substations (25MVA of capacity)

• Survalent SCADA system

• IED’s• SEL• ABB• Cooper• Beckwith• Qualitrol

• IED’s• C&D• SBS• FCI• Puleo• Kelman/GE

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History with NovaTech

• Introduced to the product at NC Association of Municipal Electric Systems conference in 2006

– Impressed with the ease of use of NCD software

– Impressed with the integration with SEL products

• First install was a successful pilot in 2007

– Hardwired, but populated with communications cards for future station upgrade

• Over the years, we have used the following

– Orion5R

– Orion5

– OrionLX

– OrionLXm

– Orion DDIO

– Orion DCIO

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Use Case #1 - LTC and Regulator Control

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Use Case #1 - LTC and Regulator Control

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Using Orion “Math and Logic” or “Advanced Math and Logic”

These are “text-based” logic editors

Terms and Concepts

• Inputs

• Outputs

• Logic Inputs

• Logic Outputs

• Events

Commonly Used Instructions

• “Dim”

• GetPoint

• If, Then, Else, Or

• SetPoint

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Use Case #1 - LTC and Regulator Control

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Use Case #1 - LTC and Regulator Control

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Use Case #1 - LTC and Regulator Control

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Use Case #1 - LTC and Regulator Control

• CONS

– Techs can’t troubleshoot with a meter, must use a laptop

– Techs don’t have a good feel for the logic

– Can’t use a “jumper” to enable voltage reduction

• PROS

– Better reliability

– Desktop troubleshooting

– Wiring was simplified

– Repeatable

– Cleaner install / less rack space used

– Safeguards – no mismatched voltages

• Rational• RTU was a Central Component, already communicating with all of the IED’s that needed control and the

SCADA Master• Allowed us to put in some safeguards

• Regulators don’t get a control signal unless all 3 are communicating• Prevents Regulators putting only 1 or 2 into Voltage Reduction

• Allowed us to save rack space by removing hardwired relays• Allowed us to keep all of the SCADA Master programming the same (retrofit)

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Use Case #2 -- Transfer Trip to Solar Farm

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Use Case #2 -- Transfer Trip to Solar Farm

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Use Case #2 -- Transfer Trip to Solar Farm

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Use Case #2 -- Transfer Trip to Solar Farm

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Use Case #2 -- Transfer Trip to Solar Farm

• Option 1 – Logic at the Master

– Master polls RTU for Feeder Breaker and Bus Breaker Status and Scheme Permissives

– Master polls Recloser at Solar Farm and sends Trip signals when necessary

– Pros

• Repeatable

• Fast rollout for new Solar Farms

– Cons

• Dependent on timing of Master to Substation and Master to Recloser poll times

• Dependent on two radio links

• Adds additional points of failure

• Option 2 – Logic in SEL relay

– SEL Relay communicates with upstream Bus Breaker and Downstream Solar Farm Recloser via Mirrored Bits

– Pros

• Speed of signaling

– Cons

• Only works with SEL not ABB DPU’s

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Use Case #2 -- Transfer Trip to Solar Farm

• Option 3 – Logic in NovaTech RTU

– NovaTech communicates with all devices: SCADA Master, Bus Breaker, Feeder Breaker, and Solar Farm Recloser

– Pros

• Repeatable

• Works at all locations

• Only dependent on one radio link

– Cons

• Techs not familiar with scripting language for logic

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Use Case #2 -- Transfer Trip to Solar Farm

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Use Case #2 -- Transfer Trip to Solar Farm

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Use Case #2 -- Transfer Trip to Solar Farm

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Use Case #2 -- Transfer Trip to Solar Farm

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Use Case #2 -- Transfer Trip to Solar Farm

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Use Case #3 – Process Control and Reverse Power Trip for Generators

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Use Case #3 – Process Control and Reverse Power Trip for Generators

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Use Case #3 – Process Control and Reverse Power Trip for Generators

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Use Case #3 – Process Control and Reverse Power Trip for Generators

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Use Case #3 – Process Control and Reverse Power Trip for Generators

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Use Case #3 – Process Control and Reverse Power Trip for Generators

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Final Notes, Gotchas and Future Plans

• Pay attention to the variable types in Ladder Logic

• Use Print Statements to track the code

• Timing is everything

• IEC6113 – Ladder Logic - May be better suited for technicians to troubleshoot in the field

• SIMULATE, SIMULATE, SIMULATE!

• Use Logic Simulator Tool

• Set up I/O if necessary

• Put comments in your logic

• Don’t buy hardware when the RTU can solve the issue

• We will be converting our scripts to IEC61131 where feasible

• Currently use LogicPak for a Trip/Close cutout scheme at the substations

• Currently use LogicPak for a General Alarm Indicator Light

• Using Alarm/Archive/Retentive for a display of substation alarms on a webpage

• General Alarm light triggers Techs to check the webpage

• Also have a routine for masking false alarms on a perimeter alarm system (Math and Logic)

• Also have a routine to match voltages with large customer when their Generators are running and Cap banks are closed.

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Final Notes, Gotchas and Future Plans

• Future plans are for another 6MW Peakshaving /standby generator site with possible transfer scheme between two utility feeds

• Water/Wastewater personnel are looking into moving from Modbus to DNP3 – May use LXm as a protocol convertor

• Upgrading all existing OrionLX standard RTU’s to MMB models

• Adding IEC61131 and Tile Annunciator to all RTU’s

• Using NovaTech IO for hardwired applications particularly integrates well with 24VDC security system components

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Contact Information

John L. Powell, PE

Engineer II, Substations and Controls

Greenville Utilities Commission

801 Mumford Road, Greenville, NC, 27834

252-551-3388

[email protected]

guc.com

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LTC logic for stepping down based on KVar

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Security System Logic for aggregating discrete alarms into zones

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Security System Logic for aggregating discrete alarms into zones

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Security System Logic for aggregating discrete alarms into zones

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Security System Logic for aggregating discrete alarms into zones

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LTC logic for stepping down based on KVar


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