New Perspective of Distribution Network Monitoring and Control in Lisbon. Andrew Donnelly Nuno Dias Ricardo Guimarães António Bento Franco

Transcription

1 New Perspective of Distribution Network Monitoring and Control in Lisbon Andrew Donnelly Nuno Dias Ricardo Guimarães António Bento Franco

2 Project Context Monitoring and Modelling EPAL s distribution network serves the following purposes: Network Condition Water Loss reduction and improved Efficiency Network Network Condition and performance assessment Condition Water Quality and Customer Satisfaction Monitoring Modelling Monitoring Modelling Quality Customer Satisfaction Water Loss Quality Efficiency Customer Satisfection Water Loss Efficiency

3 DMA District Meter Area Implementation Improved network knowledge leading to Non-Revenue Water Reduction 1) DMA planning and set up: create monitoring points; meters at DMA entry/exits; boundary valve identification and lock-in; real-time pressure monitoring at critical points; DMA validation through Pressure Zero Test. 2) continuous DMA monitoring: telemetry at DMA entry/exits and large consumers: - pressure and flow every 15 minutes; - passive system with active alarms. ) D i i d l i ) Data integration and analysis: IT development; performance indicators and DMA ranking; water balance: real and apparent losses.

4 DMA Implementation Evolution 2009 Project Kick-off (2006) DMAs clients 264 km k mains i DMA Implementatio Evolution 2nd year (2007) DMAs clients 89 km mains rd year (2008) 9 DMAs clients 19 km mains 4th year (2009) 5 DMAs clients l 197 km mains 5th year (June 2010) Final 5 DMAs completed! % 96% 97% 77% 80% 71 51% 54% 1 17% 22% DMA 2008 Y Year 2009 % Clients % Mains 2010 Total 150 DMAs Implemented (2010): clients li 1209 km mains 1407 valves verified 816 closed l d DMA boundary b d valves l 100%

5 Data Management Systems Telemetry Automatic meter reading GIS (G/Interaqua) Client billing system (Aquamatrix) SCADA Integration, Monitoring and Control - Essential tool for Active Leakage Control and operation; - Net daily total volume and minimum night flow; - Dynamic system for network performance analysis; - Real-time pressure and flow alarms; - Easily accessible, transversal data interface. - Statistical tendency analysis with graphic presentation.

6 Non-Revenue Water Calculation Top-Down Approach Minimum Night Flow Used Volume Minimum Night Flow = Authorised Night Flow + Real Losses - Potential Problems Identification Billed Volume Authorised Flow = Total Losses Large Clients Telemetry = Apparent Losses + Real Losses Retrievable Real Losses = Real Losses Unavoidable Real Authorised Flow Losses - Min Night Flow Authorised Night Flow = F domestic + F non-domestic Total Real Losses = unrecoverable + unavoidable Bottom-Up Approach Objective: Use both approaches to identify and reduce Recoverable Real Losses

7 DMA Planning and Network Operations Support The combination of Monitoring and Modelling have the potential to enhance network management: DMA planning and optimisation; Pressure management and reduction potential; Network development; 80 sizing and impact analysis of network expansion; 260 Operational analysis of emergency situations 670and energy optimisation. 60 Pressão no Ponto Critico da ZMC da Zona Superior DMA Critical Point Pressure DMA Actual Impactos Pressure Reais Predicted Impactos Ponto Critical sobre Impact as Pressões Simulados Pressure 54 Impact sobre as Crítico ZMC Point (m(m) c.a.) Pressões (m) (m c.a.) essure ssão (m (m) c.a.) Pres :00 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 0:00 Hora 650 Hour Cenário Base Scenario Base Cenário Supply Scenario com abastecimento to the Lower à Zona Zone Alta Cenário Supply Scenario com abastecimento to the Lower à Zona Zone Alta with e a VS opened 9648 aberta valve 550

8 Network Diagnosis DMA00 Estefânia 14 Monitoring and Modelling allow analysis and diagnosis of network problems: 12 PMZ Network pressure mapping using dataloggers; 122 Pressure headloss between consecutive dataloggers; 120 Logger Model recalibration using EPANET based on actual pressure readings; Log 05 Log 02 From 200mm to 15mm Network Diagnosis Reports contributing to investment planning decisions. Cota Head Piezométrica (m) (m) Ago Ago Ago Ago Ago-09 0-Ago-09 Hour Tempo From 200mm to 140mm Logger 02 PMZ 650 Logger Cota Head Piezométrica (m) (m) From 00mm to 200mm Ago Ago Ago Ago Ago-09 0-Ago-09 Hour Tempo Logger 04 Log 0 Log 04

9 Case Study DMA1060 Vale de Alcântara DMA Performance after the Intervenction Before After TotalDMA Analysis Project Methodology: Daily Flow m /d Average Minimum Night Flow for this period Ab l t Mi Absolute Minimum i Ni Night ht Fl Flow Value Minimum / Average Flow 76% Performance and DMA net volume41% analysis; % Authorised and Unavoidable Night Flow Demand and leakage characterisation for large Retrievable Night Flow Recovered Night g Flow Analysis Period; (Absolute minimum Begining: for this26-set-2008 period) End: 6-Out-2008 N.º Days: 11 DMA Performance Recovered Losses FlowDMA boundary valve validation; Average Minimum Night for this period 21. X 59.9 = m /d (NDF x Recovered Absolute Minimum Night Flow Night Flow) Office work: DMA consumers. In situ work Lift n Shift + Find n Fix: Leakage Detection equipment deployment; / = 81 % 2.77 Detection interventions E t 8.60 Est: 8 60 Meas: Mroundabout are T tregistered Tot: and analysed; Critical Area old Alcântara Water Loss equivalent to 500 Step-Tests and temporary DMA000 Alterations; 11.8 mm /h /year Daily Flow and Pressure Profile Accoustic Correlation and Ground microphones; Daily Flow and Pressure Profile p Performance and Validation. Repair DMA after the Intervenction Value Minimum / Average Flow Unavoidable Losses (UARL) Authorised Night Flow Retrievable Night Flow Target Night Flow Flow (m/h)) Flow (m m/h) m /d % X 59.9 = m /d P Pressure (m) After % Pressu ure (m) Total Daily Flow Average Minimum Night Flow for this period Absolute Minimum Night Flow Value Minimum / Average92 Flow m/h Authorised and Unavoidable Night Flow Retrievable Night Flow 44 m/h Recovered Night Flow Repair (Absolute minimum for this period) Recovered Losses (NDF x Recovered Night Flow) Before %

10 Case Study DMA1060 Vale de Alcântara Possible Leak Locations: Leak Caudal Flow de Fuga at no Node Nó _ _12 (com K After initial repair and fuga (K=0.15) = telemetry installation at Water Treatment Plant, still 12.0 high unaccountable nightline 10.0 Step Testing Alcântara revealed Plant a potential 10m /h leak on a main k=48mm not located during a (P and F) k=6mm 8.0 previous repair excavation Caudal Flow (m /h) ão re (m (m) c.a.) Pressã Pressu k=24mm Pressure mapping to identify anomalies and decay; Compare pressure data with model results; Model optimisation to locale the suspected leak. What other methodologies supported our Hour Hora conviction to mark the X on the ground??? 0:00 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 0:00 Pressure Pressão at Node no Nó Lg. (Lg. Ponte Ponte Nova 4 Nova 4) Lg. Ponte Nova 4 (P) :00 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 0:00 Hour Hora Pressões Simulation Simuladas Pressões Telemetry Reais Av. Ceuta (P) Based on this evidence, further efforts made to locate the missing main Optimisation routine: Once located, acoustic correlation was undertaken and the leak found! 6 days with different operation scenarios; 15 sizes for leak hole ; 45 nodes for leak location; roughness coefficients.

11 Case Study DMA1060 Vale de Alcântara Consum mption (m/h) DMA 1060 Large-User 50 0 Before 1 Dec After 22 Mar Jan Not only leak reduction in DMA1060, case study highlights importance of integrating large user telemetry data into analysis Initial Nightline 160 m /h; Leakage reduction 110 m /h; Client Use Reduction 0m /h Around 1,000,000 m /year recovered in a single DMA with 11km of network!

12 Current Situation Non-Revenue Water: Current Status and Objective Lisbon Distribution Network st Quarter NRW Total Annual Volume Objective (million m) Cumulative effect with network rehabilitation project and other initiatives for reducing apparent losses Declining gains in non-revenue water reduction explained through the improvements in network management and efficiency gains An independent study showed that EPAL achieved the Economic Level of Leakage in 2007 and Future challenge to maintain this high level performance.

13 Impact Investigations and network diagnosis Diagnosis Pressure management and leak detection Pressure transient analysis Support investment planning Client service optimisation i Network knowledge Monitoring i Service optimisation Modelling Pro-active and preventive system management Client feedback analysis Quality Service Consultancy Events investigation Optimisation of reagent usage Losses Efficiency Non-revenue water reduction Real losses Apparent losses Client losses Support investment planning Non revenue water reduction Reducing Water Footprint

14 Obrigado Thank you! Contacts: Av. da Berlim, n.º Lisboa Tel Fax

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