HV Interface Presentation (1)

HV Substation Interface Activities: Safety/Operational Requirements

Produced By: C Doyle

Contents

• Activity 1: Installation• Activity 2A: Cable termination HV & LV• Activity 2B: Unlicensed Commissioning• Activity 3: Back Energisation• Activity 4: Commissioning• Activity 5: Post COD

HV INTERFACE ACTIVITY 1: INSTALLATION

HV Substation Interface Activities

HV Interface: Activity 1

Installation• Civil works (cable ducts)• Cable Support Install• Scaffolding• HV Cable Pull• LV Cable Pull• Earthing (assume PS Earth is Tested/Complete)• Install APDF Remote I/O Panel• NG Unlicensed Relays Installation in M1/M2

HV Interface Activity 1: Installation Safety/Procedural Boundaries

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Cable bushing

Sub FenceSUBSTATION POWERSTATION

SAFETY:• NG Safety Rules Apply• NG Performs CPS• SAP (P.Monaghan, Brian

Sleigh)• Implementation Safety

Coordinator (P. Monaghan? TBC)

• Following Review of RAMS, LWC may be issued

• Point of isolation issued for work on LV systems/ System Connection Rules

SAFETY:• APDF work is undertaken

under APDF Local Safety Instructions/Safety Rules

• Rules submitted to NG For Review

• RAMS submitted to NG 3 weeks prior to work taking place for review by NG

Operational:• APDF work under a point

of isolation for any LV work utilising their own Safety Instructions

APDF Working Party Requires:NG Persons NG Competent Persons (key Holder also)Approved scaffolders for NG Safety Rules

Operational:• NG Local Instructions • NG Performs CPO

Notes:• Area will be delineated with the EPC Contractor as PC

under the CDM Regs. APDF can access through own gate but will require a key holder under NG rules. This should be agreed at CDM meeting and also discussed through TP153 meeting to finalise.

• Programme of work to be managed through TP106 and specific working groups. APDF must submit detailed activity programme.

• Note: If earths are not terminated insulated working must be carried out under NSI 5,6 &24, RAMS should be based on this (preferably not done until earths are connected for safety)

Circuit equipment on Power station side

Surge Arrestors

Cable Protected Both Ends

Module M1/M2

Cable Pulled Not Terminated

CCT 1 & CCT 2 C&P Module

Esbi Civil Contractor RequiredNG Persons NG Competent Persons (key Holder also)

NG Working Party Requires:• To work under APDF Permit• Trained as person and work under APDF competent

person

Actions• APDF to confirm what qualifications/inductions NG Working Party Requires to

install Protection Relays in M1/M2 and process for submitting RAMS• APDF to confirm list of personnel undergoing Person/Competent Person

training from AP and DF and that a key holder will also be provided• APDF to confirm the qualifications of their contractors who will access the

substation for cable pulling HV/LV/I&C, cable support install and terminations• APDF RAMs to be submitted to NG a minimum of 3 weeks prior to proposed

work, this is to be coordinated through the TP106/153 meetings on site. ESBI remind APDF of site RAMS review period by OE prior to submission to NG.

• A safety inaugural meeting will be required to take place 6 weeks prior to any works commencing, APDF to advise when this should be scheduled

• APDF to review programme submitted under APDF/CPL/1187 and advise on current programme as changes should be coordinated through the TP meetings with NG

HV INTERFACE ACTIVITY 2A: CABLE TERMINATION HV & LV


HV Interface: Activity 2A

Cable Termination: HV & LV• Install GIS Sealing End (ABB Interface)• HV Cable Testing• Install HV Cable Termination• Earth Terminations (cable)• Scaffolding• LV Cable Testing and Terminations

HV Interface Activity 2A: HV & LV Cable Terminations

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• Point of isolation issued for work on LV systems/ System Connection Rules




• Trafo Compound locked and under NG Safety Rules

Operational:• APDF work under a point

of isolation for any LV work utilising their own Safety Instructions

APDF Working Party Requires:NG Persons NG Competent Persons (key Holder also)Approved scaffolders for NG Safety Rules

Operational:• NG Local Instructions

Apply for Isolations• HVSCC Required to bring

cable and sealing ends in remote compound (Trafo) under NG CPO

• NG Performs CPO




• Note: If earths are not terminated insulated working must be carried out under NSI rules, RAMS should be based on this (preferably not done until earths are connected for safety)


Module M1/M2CCT 1 & CCT 2 C&P Module

No System Connection 3.5m Safety Distance

HV INTERFACE ACTIVITY 2B: UNLICENSED COMMISSIONING PHASE 1


HV Interface: Activity 2B

Unlicensed Commissioning: (LV Cable terminations Complete, Prior to HV Cable)• Commissioning of signals between PP & SS

(Phase 1)

HV Interface Activity 2B: Unlicensed Relay Commissioning Phase 1

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SAFETY:• NG work in M1/M2

under APDF rules• Further coordination

required in working group meetings

Operational:• Discuss with APDF. How

will this interface be managed (Phase 1)

NG Working Party Requires:• To work under APDF Permit• Trained as person and work under APDF competent

person


Apply for Isolations• NG Performs CPO• SRS requires discussion

at TP153 (LV equipment)

Notes:• SRS requires discussion at TP153 (LV equipment)• Programme of work to be managed through TP106 and

specific working groups. APDF must submit detailed activity programme.

• NG will work under APDF rules in Module M1/M2Circuit equipment on Power station side



Actions

• NG Unlicensed to confirm power requirements for relays and APDF to ensure these are available for programmed dates

• NG unlicensed to provide commissioning plan for Phase 1 & Phase 2 commissioning

HV INTERFACE ACTIVITY 3A: BACK ENERGISATION CABLE SOAK



Back Energisation: Cable Soak

• Switch in cable for 24hr soak test• HVSCC issued and Revert Back to busbar

disconnects for further back energisation under NG CPS and APDF CPO

HV Interface Activity 3: Back Energisation Cable Soak

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• Following Review of RAMS a RISSP may be issued




• Trafo Compound locked and under NG Safety Rules

Operational:• National Grid are CPO

APDF Working Party Requires:NG Persons NG Competent Persons (key Holder also)


Apply for Isolations• HVSCC Required to bring

cable and sealing ends in remote compound (Trafo) under NG CPO

• NG Performs CPO




• Immediately after cable soak the control boundary moves to HV disconnects under a HVSCC, NG relinquish CPO role and O&M undertake this role under their local instructions which have been approved by NG

• NG retain the CPS role under contract to Asset Management

• Partial Discharge monitoring/testing to be discussed at TP106




HV INTERFACE ACTIVITY 3: BACK ENERGISATION



Back Energisation: GSUT Energisation, LV GCB, 6.6kV (as per back energisation procedure)

• Energise GSUT, IPB’s, HV Side of GCB, UT up to 6.6kV Incoming Breakers

HV Interface Activity 3B: Back Energisation: GSUT Energisation, LV GCB, 6.6kV (as per back energisation procedure)

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Cable bushing

Sub FenceSUBSTATION (O&M Operational CPO)

POWERSTATION




• Following Review of RAMS a RISSP may be issued (type of safety document to be discussed)



• RISSP Issued and taken by O&M CPO, RISSP integrated into APDF safety rules

Operational:• O&M are now CPO

under their operational procedures/local instructions

APDF Working Party in Substation Requires:NG Persons NG Competent Persons (key Holder also)APDF liaise with O&M CPO/Requesting Safety officer

Operational:• HVSCC agreed with SRS

defined as O&M CPO• Contact persons agreed

in SRS and through compliance process between O&M CPO and NG Control Centre





• O&M are CPO



O&M Personnel:NG Persons (to access substation)Competent PersonsAuthorised PersonsRequesting Safety Officer (can be the CPO) but must be trained to level to receive a RISSP

Control/Safety/Maintenance Ownership Boundaries

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CCGT Equipment

Sub Fence

NG Safety Rules /Maintenance

NG Ownership

NG Operational

APDF Safety rules

O&M Ownership

O&M Operational

HV Safety/Operational Interface Protocol

Warwick

Substation

Power Station

NG

O&M

APDF

HV Control Person/ CPO

CPOCPS

Implementing Safety

Coordinator/ SAP

APDF HV Interface manager

TP106/TP153/Working Group meetings

Planned Operational Switching/ Outages

Client Review

Planned Outages

Planned Operational Switching

Emergency Switching

Planned Switching Communications

Switching Request/ RISSP Issue

Emergency Switching

Planned Switching

Actions

• O&M Safety Rules/HV Switching/RISSP Process (including third party involvement) to be finalised and submitted to NG for review ASAP

• O&M to confirm timelines for training of Authorised Personnel for HV Control Persons

• Switching should be remote i.e. DCS• APDF to include a HV Switching Interface protocol in

safety rules to include RISSP process• CPL/O&M to confirm that HV Busbar Disconnects are to

be switched by NG and not at DCS.

HV INTERFACE ACTIVITY 4: COMMISSIONING


HV Interface: Activity 4Commissioning

• Commissioning as Per APDF Programme• Phase 2 Commissioning of Unlicensed Protection Relays (load)• Full Control & Protection Commissioning• Plant functional tests• Grid Compliance Tests• Performance Test• Reliability Run• Handover

HV Interface Activity 4: Commissioning

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Cable bushing

Sub FenceSUBSTATION (O&M Operational CPO)

POWERSTATION




• Following Review of RAMS a RISSP may be issued (type of safety document to be discussed)



• RISSP Issued and taken by O&M CPO, RISSP integrated into APDF safety rules

Operational:• O&M are now CPO

under their operational procedures/local instructions

APDF Working Party in Substation Requires:NG Persons NG Competent Persons (key Holder also)APDF liaise with O&M CPO/Requesting Safety officer

Operational:• HVSCC agreed with SRS

defined as O&M CPO• Contact persons agreed

in SRS and through compliance process between O&M CPO and NG Control Centre





• O&M are CPO• O&M are working in APDF working parties for power

station commissioning and are trained under APDF Safety Rules



O&M Personnel:NG Persons (to access substation)Competent PersonsAuthorised PersonsRequesting Safety Officer (can be the CPO) but must be trained to level to receive a RISSP


Post COD• Normal Operation

Control/Safety/Maintenance Ownership Boundaries

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CCGT Equipment

Sub Fence

NG Safety Rules /Maintenance

NG Ownership

NG Operational

O&M Ownership

O&M Operational

O&M Safety Rules /Maintenance

HV Safety/Operational Interface Protocol

Warwick

Substation

Power Station

NG

O&M

HV Control Person/ CPO

CPOCPS

Implementing Safety

Coordinator/ SAP

Planned Outages

Planned Operational Switching

Emergency Switching

Planned Switching Communications/TOGA

Switching Request/ RISSP Issue

HV Interface Presentation (1)

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