Continuous Monitoring on the SSE Networks Transmission System The Need for Standards, Specifications & Innovation

Dr. Gerry Cleary, Scottish & Southern Electricity Networks

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10th Universities High Voltage Network Colloquium

18th - 19th January 2017, GCU, Glasgow, Scotland

Dr. Gerry Cleary, January 2017

Continuous Monitoring on the SSE Networks Transmission System

The Need for Standards, Specifications & Innovation

Career History

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Dates Experience Description

2000-2003 R&D – University of Strathclyde

Partial Discharge Detection in Power Transformers using UHF Monitoring

2003-2004 ScottishPower Secondment - Plant Monitoring on the ScottishPower Transmission Network

2004 -2015 Power Systems Project & Consultancy Services (PCS), Hyder & Arcadis

Fast Transient Analysis & Insulation Co-ordination Studies, Harmonic Studies and Earthing Measurement & Design

2015-Present SSE Networks Technical Standards Engineer - Standards, Specifications & Innovations

Agenda

Safety- Priority - if it is not safe we don’t do it

Role of Standards, Specifications and Innovations Team

Why Innovate?

Advanced Technologies on the SSE Transmission Network

Overview of Caithness – Moray HVDC Scheme

Continuous Monitoring on the SSE Networks - Transmission System

Case Study: Keith Substation Partial Discharge Monitoring Project

Next Steps

Q&A

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Need for Standards, Specifications & Innovations

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Source: IE&T, November 2016

Standards

Specifications

Innovations

Stakeholder Engagement

Clear Definition

Level of Detail

Why Innovate?• Responsibility to Deliver Power and Manage Transmission System

• Provide Value for the customer

• Regulated Industry Encourages Innovation

(RIIO: Revenue = Incentives + Innovation + Outputs)

Safety

Site Practicalities – Specification & Discussion are Key

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Port Glasgow – Greenock Dry Dock: Pipe Laying Ship

Optioneering

Network Reinforcement: System Planning

Site Selection: Substn. A & B

Route Selection: Subsea Surveys & Third Parties

Safety, Environment & Legal

Specification (Cable)

Installation & Mechanical Protection

Commissioning, On-Line Monitoring & Repair

Some Examples of Advanced Technologies on the SSE Network

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Gas Insulated Switchgear

Composite Poles for Overhead Lines

SVC (Static VArCompensator)

MSCDN (Mechanically Switched Capacitor Damping Network)

HVDC: Caithness - Moray

Gas Insulated Busbar

Subsea Cable Circuits

Subsea Cable Transmission Circuits• System Design – System Planning

• Accurate Specification is Critical – Safety, Logistics, Cost, Performance

• Stakeholders: Electrical, Civil, Environmental, Operational, Consultants, Contractors & Other

• Suite of Specifications: from Subsea Cable Surveys, Cable System Design, Installation, Testing & Maintenance

• Operation & Repair of Emerging Technologies

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References[1] SSE Press Release, Keeping the Lights On.[2] Nexans, O Angoulevant, Offshore Cables

Overview of HVDC (Caithness-Moray )

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References[1] Electrical Engineering Portal, Costs of HVDC Transmission[2] ABB, HVDC Technical Brochure

Indicative distances -to be confirmed on a per project basis

Potential Advantages Some Challenges

[1] Reduced Visual Impact [1] Rapidly Changing Technology

[2] Control (Frequency, Power Flow & Stability) [2] Difficult to Standardise

[3] Reduced Short Circuit Currents on AC System [3] Cost of Converter Stations

[4] Connection of Asynchronous Grids [4] Operation & Maintenance

Overview of Blackhillock Substation

• ~£1.1B Investment, ~100 miles of cable

• 400kV (GIS), 132kV (GIS), 275kV (AIS), BOWL (Offshore Wind)

• HVDC Converter Station

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References[1] Blackhillock Substation – Early Construction Stage

Partial Discharge (PD) Testing & Continuous Monitoring

PD Testing at Commissioning

PD Testing: Initial Site Investigation

PD Monitoring: Milton of Craigie, Keith & Tealing Substations

Potential for Further PD Monitoring?

Gas Monitoring

Distributed Temperature Sensing (DTS): Kintyre – Hunterston Subsea Cable

Fault Recorders

Harmonic Recorders

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Case Study: Keith Substation Partial Discharge Monitoring Project

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Site Selection

Substation Wide Monitoring

HFDE, Elimpus & HVPD

Acquisition of PD Signals

Asset Management

Next Steps:

Gather Lessons Learned

Specification Refinement

Interaction of AC & DC Systems

Impact of Long Subsea Cable Circuits

Operation & Repair of Emerging Technologies

Condition Monitoring – Telecommunications Infrastructure

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Any Additional Questions & Answers?

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