Relay Protection & Control

Emerging technological advances coupled with stringent regulatory compliance requirements create an increasingly complex Grid engineering landscape. PGE has a distinguished history in providing Relay Protection & Control engineering services to the Power Systems industry. PGE prides itself on its proven performance quality and earned customer trust in providing Protection and Control engineering services.

The PGE quality control and assurance processes ensure PGE personnel are armed and proficient with the most up-to-date training, tools, resources and knowledge of customer and industry relay protection and control engineering procedures and standards. PGE prides itself on active listening to the customer, while providing and delivering the best engineering services possible with an expectation of exceeding our customers’ Relay Protection & Control needs. As a matter of corporate policy, all PGE Relay Protection & Control designs adhere to our customers’ most stringent requirements, while utilizing IEEE standards and manufacturers’ equipment recommendations as foundations.


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Relay Protection And Control Services

Relay Design

  • Functional Single Line Diagram
  • Relay Control Panel Layout
  • Point-to-Point Wiring Diagram

Meter Configuration & Commissioning

  • Meter Settings
  • Host & RTU

Equipment Specification

  • Remote /Network Terminal Unit
  • Substation Communications Networking
  • IED Hardware
  • Transformer/Breaker Monitoring

Equipment & Technology Evaluation & Analysis

  • HMI
  • Substation Automation
  • Remote Input/Output
  • Data Concentrators

Relay Settings & Engineering

  • Fault Studies
  • Coordination Studies
  • Control Logic
  • Relay Communications Networks
  • Transformer/Transmission/Bus/Generation & Feeder Protection Engineering Designs

Portfolio Highlights

 230 kV Bus Protection Master Template


Designed a customer standard TEMPLATE for applying protection to a 230 kV bus connected to a 500/230 kV transformer. Design included panels and a standard drawing package to apply protection schemes to both new and existing facilities.

Substation Upgrade


The addition of a new control house with new protection and controls for a 138 kV, four-position ring-bus. The new control house required a RTU, three-line protection panels, telecom panel, a new DFR, four breaker panels, and one 230/138 kV autotransformer protection panel. The design package included the functional single-line diagram, bills of materials, schematics, and wiring and connection diagrams.


Relay High Speed Communications


Eliminated legacy RTUs and upgraded protection and control at four Distribution substations. Designs included new SEL-351 relays and an SEL-3530 RTAC. PGE also performed multiple substations print designs, relay settings and communications configuration and commissioning.


Substation Design


New control house, two 230 kV lines, 230/115 kV autotransformer, upgraded 115 kV protection and controls for four lines, and upgraded protection for two 115/13 kV Distribution transformers and 10 Feeders.


Transformer Paralleling


Added transformer paralleling scheme for two 230/69 kV autotransformers using Beckwith transformer paralleling controls.


Protection Schemes Upgrade


Upgraded protection and controls for 138/69 kV substation including two 138 kV lines, one 138/69 kV autotransformer and two 69 kV lines.


Line Relay Upgrades


Upgraded 230 kV protective primary and secondary line relays for a Central Florida Transmission Line and upgraded control relays for two 230 kV breakers.


Substation Modifications


Designed a modification to split the bus differential into two zones – with a requirement that a single transformer or bus fault did not trip the entire substation. The design package added a new panel with differential relays, modified trip and lockout circuits.


APSTF Step 2 Analysis


Performed Step 2 Analysis for 230 kV switchyard based on FRCC’s Step 2 analysis, protection and stability task force procedure.