1. Pipe Patrol – Leak detection and localisation system for Water Networks

2. PipePatrol - Leak Detection & Localistaion Principle of Extended Real-Time Transient Model - ERRTM Implementation Practical Example

3. Potable Water Market | WATERFLUX 3070 (V3) for internal use | 2016-6|
Potable Water Market
Increasing water scarcity is posing an enormous challenges on water authorities to
preserve water resources
provide access to drinking water
develop & upgrade water distribution networks
reduce non-revenue water (NRW)
As part of their strategy water companies are implementing >>

4. Potable Water Water Producer / Owner Resource management
Water distribution networks:
Monitoring & controlling (part of control loop)
Reduce Non Revenue Water (NRW) - Align with pressure management systems Leakage management
District Metering: Zoning for water balance
Revenue collection:
Billing based on actual water consumption

5. PipePatrol Leak Detection System
Features
For liquids, gases
Single & Multi-products
Uni and bi-directional metering
Single & Pipeline Networks
For pipelines longer then 3 km / 2 miles
Compliant to API 1130
Technology
Continuous monitoring
Zero false alarms by leak pattern recognition
Easy retrofitting using existing field instrumentation
Interfaces to existing SCADA systems
Highest sensitivity even under transient pipeline conditions
through E-RTTM (Extended Real Time Transient Modelling)
Overview of what PipePatrol is and what it can do. USPs of PipePatrol are:
The only system that allows accurate leak detection under transient pipeline condition
Minimal false alarms (max 2 per year)
Not necessary to install instrumentation
Zero false alarms aim
Can install on existing systems
Model pipline behavior

6. The Technology of PipePatrol
Reliable Pipeline Monitoring with E- RTTM-Technology
E-RTTM = Extended Real-Time Transient Model
Use a mathematical model to simulate Virtual Pipeline, incl. instrumentation wherever its needed
Calculate hydraulic profiles in real time
Creates decision values by comparing calculated values to measured values
Extended = Add Signature Analysis to find leaks and avoid false alarms
P, T
P, T
„Virtual Pipeline“
(RTTM) F F
Calculated, leak free flow rates
Transient free decision values
Decision: Leak yes or no
If leak, then calculate leak rate and position
Signature Analysis
PipePatrol E-RTTM
Signature Database 6

7. Traditional leak detection system
22/11/2018
Traditional leak detection system
Outlet flow,
measured by flowmeter
Difference between inlet and outlet
flow, not zero due to transient
pipeline behaviour
This is not PipePatrol but a simple system balancing inlet and outlet flow.
Due to transients (that occur during start-up, operational changes, etc) inlet minus outlet flow is not zero, meaning only catastrophic leaks can be identified. Since spontaneuos leaks occur under transient conditions (as under these conditions the pressure changes) this traditional system is not a good system.
Must model pipeline
Inlet flow,
measured by flowmeter

8. PipePatrol Operator Station (screendump)
22/11/2018
PipePatrol Operator Station (screendump)
Screen dump of PipePatrol. Note that we calculate the flow anywhere in the pipeline. This means we can compare the calculated flow with a measured flow anywhere in the pipeline. Typically flowmeters are only installed at inlet and outlet, so thypically this is the only place where you compare flow.

9. PipePatrol E-RTTM Outlet flow, Measured by flowmeter (red)
22/11/2018
PipePatrol E-RTTM
Outlet flow,
Measured by flowmeter (red)
Calculated by RTTM (orange)
Outlet flow residual,
Difference between calculated
and measured flow
Same curves as previous slide, however now we show measured and calculated flow (previous slide was only measured flow). Calculalted flow is based on P and T at inlet and outlet only.
The rights graps shows the difference between measured and calucluated flow at inlet and outlet.
Inlet flow,
Measured by flowmeter (blue)
Calculated by RTTM (green)
Inlet flow residual,
Difference between calculated
and measured flow

10. Zero false alarms by leak pattern recognition
22/11/2018
Zero false alarms by leak pattern recognition
This is a typical leak signature,
Resulting in a leak alarm
When residuals cross a predefined ,
threshold, leak pattern recognition
Is used to distinguish between a
true leak and a sensor drift
When the residuals (calculated minus measured flow) cross a predefined threshold, we analyse if this is caused by a sensor drift or a real leak. A real (spontaneous) leak will always show a dynamic effect as seen in the bleu curve. A sensor drift will be shows as a sensor warning (see also next slide).
Combining this leak pattern recognition with RTTM, results in E-RTTM (Extended Real Time Transient Modelling).
This is not a leak signature
but a typical sensors drift,
resulting in a sensor warning

11. PipePatrol Operator Station (screendump)
22/11/2018
PipePatrol Operator Station (screendump)
Up-and-running
No Leak Alarm
No sensor warning
Batch tracking
100 km long pipeline
Hydraulic profiling
Event logging
Screen dump of PipePatrol. Labels on the right show what you see.
User management

12. PipePatrol hardware lay-out
22/11/2018
PipePatrol hardware lay-out
Pipeline
Instrumentation F P T T T P F
Data communication
PLC slave
PLC slave
PLC master
PipePatrol
Monitoring
Station (PC)
Operating
Station (PC)
Hardware lay-out.
Note that we only need flow, pressure, temperature and ground temperature at inlet and outlet.
Existing equipment can be used for this, if required KOG can also supply all equipment and take project responsibility.
Can be retrofitted
PipePatrol will work with existing field instrumentation and interface to any SCADA system

13. What is a good Leak Detection System?
Detect small leaks fast
Typical smallest detectable leak rate app. 1% (nom. Flow)
Very fast detection time, typically < 3min
Sensitivity
Produce no false alarms
Extraordinary small false alarm rate (<2 per year)
Reliable detection of smallest leaks
Reliability
Don‘t shut down the Leak Detection if a component fails
Robust Hardware with redundancy options
Fall back strategy if sensors fail
Robustness
Calculate accurate leak rate and position
Leak localisation accuracy typically between 1% und 2% of the segment length
Accuracy
PipePatrol E-RTTM 13

14. PipePatrol Principle Leak Localisationx L
xLeak pL p0
Simultaneous calculation of leak position with three different methods
Gradient Intersection
Time-of-Flight
Extended Time-of-Flight
Main advantages
Combines strengths, avoids weaknesses
Provides excellent overall accuracy t t x L
xLeak
tLeak p0 pL t0 t1 t2 tL t x L
xLeak
tLeak p1 x1 p2 x2 p0 pL
Leak Localization

15. Leak Detection & Localisation Example
Fluid Water
Pipeline 27km Diameter 1.0m
Flowrate 8500 m3/hr
Pressure 750kPag & Temperature 20degree
Flow, Pressure & Inlet & Outlet of pipeline
Communication Link via 3G Link

16. System Performance
Leak Detection & Localisation 100% Availability during pumping and packing conditions & Steady State
Leak Rate Detection < 1% = < 85m3/hr
Leak Location Accuracy <0.1% = 18m
Time to leak Alarm < 2min
Number of False Alarms ZERO

17. PipePatrol – Main Distribution
The two most rigorous regulations, PipePatrol complies to both.
Application Note Liquid 17 17

18. Conclusion – PipePatrol
E-RTTM System
Gas & Liquid Pipelines / bi directional / multi pipeline networks
Fully functional in transient and steady state pipeline conditions
Expandable
Leak Detection & Localisation