Download presentation
Presentation is loading. Please wait.
Published bySemaj Gath Modified over 9 years ago
1
Mod 0273: 1 st Development Group Workshop 4 th February 2010
2
NG NTS Initial Views (December 2009) Are comparisons to the electricity model appropriate? The 3 month Connection and Use of System Code (CUSC) Modification Application process employed in electricity does not include a feasibility study Feasibility Study fees are not published in electricity The gas process needs to be fully understood In comparison to electricity, the number of new connections and Network Exit Agreement (NExA) changes are relatively few Receiving a number of enquiries in a relatively short period can cause workload planning difficulties The timescales in gas vary considerably depending on the complexity of the customer requirements/installation Feasibility Studies are important as they are undertaken to meet legislative obligations
3
Electricity Connections / Modifications Connection & Use of System Code (CUSC) Process
4
Electricity New Connections & Modifications - CUSC Process The CUSC process offers a 3 stage connection process; Feasibility Study (If required) Connection Offer and Acceptance Physical Connection / Modification Feasibility Study Formal application & Payment cleared Clock Start Sanction Offer Made Connection OfferAcceptance (Optional) 3 Months 6 Months+ Works
5
Electricity New Connections & Modifications - CUSC Process (Cont.) – Feasibility Study Typically undertaken to help determine the best location for a new connection (e.g. Power Station) Rarely used (1-2 p.a.) as information quickly becomes out of date and timescales are longer than for formal application process Unregulated service - all costs are recovered, no delivery SLA National Grid Daily rates are published but costs of studies may also include contractor costs. The number of hours involved is also not known until the scope is agreed.
6
Electricity New Connections & Modifications - CUSC Process (Cont.) – Design Stage (1) Formal 3 month process covering New Connections or Modifications to existing contracts National Grid offers to hold one pre-application meeting Associated documentation is extensive ‘Clock starts’ only when all documentation is received/approved & funds have been paid Modelling analysis work is predominantly conducted “in house” by 40+ engineers NGET receive a considerable number of applications p.a. New connections: 40% Modifications: 60%
7
Electricity New Connections & Modifications - CUSC Process (Cont.) – Design Stage (2) Fees (fixed & indicative) published for New Connections & Modifications – average £100k, capped at £400K Offer includes commencement date (fixed) and list of works (can be amended at a later date) Offer for new connections & modifications made within 3 months NG can request an extension to the 3 month timescale but this is rarely used Acceptance; User has 3 months to accept and only minor changes to contract are allowed Major changes = new application
8
Gas Connections / Modifications NTS Exit Points with Network Exit Arrangements (NExAs)
9
New Connections & NExA Modification Process (1) Offering Customers a connection to the NTS or a modification to their existing NExA is a license obligation (LC4B) New connection & modification processes are undertaken in line with the Statement & Methodology for Connection Charging. Available via link: http://www.nationalgrid.com/NR/rdonlyres/07959E2F-621E- 4E55-8051-F19514F23EC4/35303/SC4BApril2009v30.pdf http://www.nationalgrid.com/NR/rdonlyres/07959E2F-621E- 4E55-8051-F19514F23EC4/35303/SC4BApril2009v30.pdf Statement also includes worked examples of connections with indicative costs: Conceptual design study for new connection - approx. £30k to £50k Feasibility study to assess impact of adding a new connection…- up to approx. £150k Feasibility study for System Extension pipeline (Exit only) - approx. £100k to £400k, depending on pipeline length and route Users/developers must commit to payment of the cost estimate prior to commencement of the study
10
Acceptance Feasibility Study New Connections & NExA Modification Process (2) A 3 phase approach is also offered for new exit connections; Customer Engagement & Feasibility Study (If required) Design studies Conceptual Detailed Siteworks Indicative Conceptual design study timescales are provided (on the web) – 20-26 weeks but it is also explained that it “would be longer for complex projects” Work is often staged to enable a customer to understand project feasibility, costs and timescales without committing to full costs at the outset Offer Made Conceptual Design (Optional) 6 months 3 Months3-6 months Siteworks 6 - 24 Months Detailed Design 6 months
11
New Connections & NExA Modification Process (3) Modifications include physically moving the exit connection and amending ramp rates/operating pressures A Feasibility Study maybe required prior to conceptual design and/or construction For Modifications the scope of a Feasibility Study is ‘flexible’ and tailored to suit the customers requirements but also varies depending on: the complexity of the project the size of the installation Once scope is agreed, the timescales and costs of the (bespoke) Feasibility Study are agreed with the customer upfront (contract) A Feasibility Study may include; An Impact Analysis of onsite components & wider network issues An evaluation of options and any additional analysis as specified / agreed with customer Indicative timescales & costs for Design & Sitework phases Further detail to follow
12
Why is it important we conduct analysis within a feasibility study? Rapid load changes during start up and shutdown could affect the efficient and effective operation of the pipeline system Trigger safety devices and cut off supply at the installation Cause damage to National Grid equipment at installations such as pressure regulators, filters and orifice plate meters Adversely affect other Users of the system (entry and exit points) in the vicinity Legislation Health and Safety at Work Act etc. 1974 Pressure Systems Safety Regulations (PSSR) 2000 Pipeline Safety Regulations (PSR) 1996 Further detail to follow
13
Typical timescales and costs Important to remember that there is no such thing as a ‘typical’ project! Further detail and case studies to follow CharacteristicTimescaleCost Simple changes/minimum connections3-6 months£10k to £50K Semi complex changes/medium size connections6-9 months£50K+ Complex changes/large connections9-12 months£100K+
14
What is involved in conducting a study? Further detail to follow
15
Further detail National Grid NTS propose that an Network Design expert should cover certain aspects of the process in detail at March session
16
Problems with current arrangements – NTS perspective Timing Indicative timescales are provided, however Complexity of exit connections/modifications and associated differences in scope make it difficult to define exact timescales upfront Costs Indicative costs are provided, however again Complexity of exit connections/modifications and associated differences in scope make it difficult to define exact costs upfront
17
Problems with current arrangements – NTS perspective Communication No visibility of upcoming work (types, number, nature and frequency) - r eceiving a number of enquiries in a relatively short period can cause workload planning difficulties Process Some enquiries are speculative in nature Scope creep is sometimes a problem Customers don’t always know what they want! Customers often experience difficulties in providing the information requested, especially if it needs to be provided by their equipment suppliers Difficulties in agreeing Contractual terms (between Customer and NG)
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.