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Jamie Talbot May 2014 Milton Keynes Electric Bus Demonstration Project
Jamie Talbot
May 2014
Milton Keynes Electric Bus Demonstration Project
Project overview
Milton Keynes demonstration programme • Fully electric service • Regular IPT charging periods without any disruption to the
existing timetabled service • Principal urban route through city centre • High capacity service, operating between 06:00 and 23:00 • 5 year demonstration period
1 - Wireless Opportunity Charging using Induction Power Transfer (IPT) • Requires no cable connection
• Can deliver very high power ratings (typically 120 kW)
• High efficiency of transfer (90%+)
• Proven system in public operation
maspMBK ARUP SUSTAINABLE PROJECTS LTD
2 - The Collaborators
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3 - the ‘Enabling Company’
• Significantly increases vehicle range • Enables a lower capacity battery (lower cost, lower mass)
Opportunity charging - IPT
Source: Conductix-Wampfler GmbH
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Source: Conductix-Wampfler GmbH
The technology has a proven track record The ‘Linea Star’ route in Turin • City-centre route • Has operated successfully for more than 10 years • Carries c. 225,000 passengers p.a
Source: Conductix-Wampfler GmbH
Milton Keynes – A City of 230,000 people
Central Station
Wolverton
Bletchley
Milton Keynes - Route 7 15 miles, 750,000 passenger journeys/year
The Buses – Wrightbus Streetlite
The Chargers – 120 kW Primary Charging Unit
In-ground module
Charge module
Monitoring Unit Cooling system
Opportunity Charging with IPT®
Primary Side Components
Source: Conductix-Wampfler GmbH
The Chargers – 120 kW Primary Charging Unit
Opportunity Charging with IPT®
Primary Side Components The Chargers – Wolverton installation works
Opportunity Charging with IPT®
Primary Side Components The Chargers – Wolverton
Opportunity Charging with IPT®
Primary Side Components The Chargers – Bletchley installation works
Opportunity Charging with IPT®
Primary Side Components The Chargers – Bletchley
The Overnight Chargers
• 5 x twin 23kW cable connected Chargemaster units
Route 7 – Data Collection
• Ambient conditions • Date, time of day, temperature, etc.
• Driving conditions • Speed, acceleration, braking,
passenger load, etc.
• Secondary charger conditions • IPT on/off, power transferred, transfer
efficiency, etc.
• Battery conditions • Cell voltages, temperatures, states-of-
charge
• Primary charger conditions • IPT on/off, power transferred, network
impact (capacity limits, power factor, harmonics, etc.)
Route 7 – Data Collection
• Operator Issues • Reliability, operational flexibility,
cost of operation, driver satisfaction, maintenance crew satisfaction, etc.
• Passenger Issues • Ridership changes, passenger
satisfaction surveys, etc.
• Local Authority Issues • Service quality, environmental
impact (air quality, noise, dirt etc.)
• A principal urban bus route passing through the city centre, operating from 6:00am – 11:00pm
• High annual bus mileage (approx. 56,000 miles per vehicle, with a total annual route mileage of 450,000 miles)
• Long-distance, urban/suburban duty cycle (approx. 15 miles)
• High speed service (average speed 16.3mph), with a service frequency of 15 minutes
• High route ridership (775,000 passengers p.a.)
• Reduction of 269 tonnes of CO2 emissions, moving to 686 tonnes as the UK grid gets progressively greener, plus over 5 tonnes of particulates and other noxious products from the streets of Milton Keynes.
The MK Project - World First?
To our knowledge, this will be the first time in the world where an electric bus fleet has been deployed to provide a timetabled public service of this intensity, where the long-term economics of operation are competitive with the diesel bus fleet which it replaces.
The MK Project - World First?
