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High-Speed Falling Conductor Protection

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GridNode High-Speed Falling Conductor Protection

GE’s GridNode High-Speed Falling Conductor Protection provides a reliable solution to detect and isolate broken overhead line conductors using secure wide-area measurements.

When an overhead power line breaks, the energized conductor falls to the ground or surrounding objects causing a high-impedance fault and/or arcing. For over 20 years, the industry has relied on negative-sequence current (I2/I1) principles to detect a broken conductor. However, with the increasing penetration of Distributed Energy Resources(DERs) and depending on the number of loads and/or presence of single-phase loads connected to a line, this solution is no longer an efficient method of protection.

GE’s GridNode High-Speed Falling Conductor Protection offers an evolution to falling conductor monitoring and protection by delivering enhanced reliability, speed, and performance needed for today’s distribution networks.

Key Benefits

  • Reliably identify broken overhead lines and trip corresponding breakers or block a recloser under 500ms prior to the conductor touching the ground
  • Easy deployment with no coordination required with existing protection settings
  • Minimize customer impact with coordinated operation to isolate the broken line
  • Increased flexibility through the ability to accommodate high DER penetration
  • Prolong asset life by preventing potential damage caused by unnecessary reclosing
  • Increased reliability with the capability to detect broken conductors in low load branches as well as feeder end
  • Enhanced reliability through real-time adaptive settings
  • Low implementation costs by leveraging existing digital protective relays
Overview
Architecture
Services
Components

GE’s GridNode High-Speed Falling Conductor Protection provides a reliable solution to detect and isolate broken overhead line conductors prior to the conductor touching the ground for both transmission and distribution networks. This is a substation centric based solution that is based on the rate of change of impedance.

Typical Broken Falling Conductors take 1.3 seconds to touch the ground on a distribution system.

Network Benefits

  • Increased Safety through quick detection and isolation of broken overhead lines
  • Risk Reduction in fire ignition caused by a down conductor
  • Reduced damage caused by unnecessary network reclosing
  • Increased customer reliability by minimizing the number of customers interrupted through coordinated protection
  • Ability to accommodate a high and growing number of distributed energy resources on your network without impacting broken falling conductor protection
Normal State

Normal State

Traditional Protection

Broken Falling Conductor

Broken Falling Conductor

GridNode High-Speed Falling Conductor Protection

Benefits

  • Operates in under 500ms prior to the conductor touching the ground
  • Up to 8 times better sensitivity at detecting broken conductors than conventional I2/I1 methods for distribution networks
  • Works in areas with high penetration of DERs
  • No coordination required with existing protection devices
  • Scalable to multiple feeders and beyond the substation and has the ability to isolate and coordinate the trip to the faulted line section
Broken Down Conductor

Broken Down Conductor

Down Conductor Technology

Benefits

  • Ability to detect down conductors under certain circumstances

Drawbacks

  • Safety and fire concerns as conductor has already touched the ground
  • Applicability depends on ground surface type

Architecture

GE’s GridNode High-Speed Falling Conductor Protection Solution is scalable system that provides reliable and fast detection of broken falling conductors in the distribution or transmission system. The solution can connect to devices inside the substation as well as along the feeder.

architecture diagram

Substation Based Solution

  • Increased detection capabilities on low load branches
  • Ability to coordinate and sectionalize the line closest to the fault
  • Requires V&I measurements from IEDs
  • Supports up to 10 Feeders
  • Vendor agnostic
  • Utilizes standard communication protocols

Substation + Line Devices Solution

  • Increased detection capabilities on low load branches
  • Ability to coordinate and sectionalize the line closest to the fault
  • Requires PMU data for connected IEDs
  • Supports industrial standard communications (fiber optic, radio (licensed or unlicensed) or cellular

Services

GE’s Advanced Application Services team provides the following engineering and consulting services as part of the High-Speed Falling Conductor Protection solution.

CONSULTING
PMU placement assessment and support
Deployment strategy
COMMUNICATIONS
Network and communications system design
Hardware specification
ENGINEERING
System configuration; Settings development
Cybersecurity
FACTORY TESTING
Factory acceptance testing including Hardware-in-the-Loop (HIL) testing and validation
INSTALLATION & SITE INTEGRATION
Field services; Site integration services
Communications, network, and I/O testing
TESTING & COMMISSIONING
Site acceptance testing and performance validation
TRAINING & SUPPORT
Master service agreement to help maintain the accuracy of the operation following network topology changes

Components

GE’s GridNode High-Speed Falling Conductor Protection Solution includes the following:

GPG Controller

GridNode High-Speed Falling Conductor Protection Solution - Hardware specifications

  • Certification: IEC 61850-3, IEEE 1613, CE, FCC Class A, UL, CCC
  • Mounting: 2U/19” Rack mount
  • System Design: Fanless, with no internal cabling
  • OS Support: Windows and Embedded RTOS VxWorks for critical real time
  • Power Consumption: 19W/220VAC or VDC (Typical)
  • Power Supply: Redundant 100 ~ 240 VAC (47 ~ 63 Hz) DC: 100 ~ 240 VDC DC: 48VDC with isolation protection
  • PRP & HSR Ethernet redundancy
  • Two expansion slots to increase serial and Ethernet port types and quantity
GPG

GridNode HFCP HMI

GridNode HFCP HMI

GridNode HFCP Configurator

GridNode HFCP Configurator

Solution Components

UR

Protective Relays

S20

Communication Switches

RT430

Time synchronization clock