Effective energy management in city transport vehicles · Effective energy management in city transport vehicles . ... - Power source: 160kW diesel generator, traction battery Li-Ion,

ŠKODA ELECTRIC a.s.

Petr Kasenčák 10.04.2013

Effective energy management

in city transport vehicles

ŠKODA TRANSPORTATION Group

Group of companies engaged in the field of transport engineering, with tradition dated since 1859.

Focused on the transport engineering industry,

its key products include:

•low-floor trams

•electric locomotives

•subway trains, suburban train units

•hybrid vehicles and trolleybuses

•traction motors and complete propulsion equipment for transport systems.

ACTUAL TRENDS

Long term increase

of fuel and energy costs

Environmental aspects

= necessity of effective energy management

= relatively high fuel consumption

= frequent braking and acceleration

= impacts on environment, emissions produced directly in city agglomerations

CHARACTERISTICS

OF CITY TRANSPORT VEHICLES

City transport

= range with high importance

of effective energy management

TRANSPORTATION GROUP

TROLLEYBUSES

• modular design and of electrical equipment

- IGBT based traction equipment software controled

- water or electrical heating

- selection of traction motors and converters etc.

- automatic or manual collectors etc.

• high-tech solutions for device for autonomous drive:

- diesel generator – electrical power 50kW – 175kW fulfilment of EURO norms

- traction batteries – for 12m – 24m trolleybus -designed for different line profiles

- supercapacitor - fitted for the vehicle

TRANSPORTATION GROUP

SERIAL HYBRID BUSES

- Full low floor 12m length bus

- Bus operation in city with frequent stops – electric powered city bus

- Possibility of pure electric operation in the city center up to 10km autonomy

- Measured fuel saving 20-35%

SORT1 35% SORT2 29% SORT3 24%

- Modular solution of the components

- Asynchronous traction motor 120 kW, Voltage 300V

- AC propulsion traction drive with IGBT technology, small converters

- Power source: 160kW diesel generator, traction battery Li-Ion, supercapacitors

Basic configuration of traction drive for serial hybrid

Options

Diesel-generator Traction motor Traction inverter

and auxilliary drives

+ +

Traction baterry Supercapacitors

+

TRANSPORTATION GROUP

TROLLEYBUS & SERIAL HYBRID BUS

Traction drives with new IGBT technology

Higher efficiency compared to previous solutions (GTO thyristor…) = energy consumption about 5 – 10 % lower

= implicit regenerative braking

= weight savings

= longer lifetime

= lower maintenance costs

TROLLEYBUS & SERIAL HYBRID BUS

Regenerative braking

Usage of the energy for auxiliaries (heating, air compressor etc.) Energy savings:

about 10 - 15% in “average conditions”

up to 30 % in optimal conditions (example = experiences from San Francisco)

TRANSPORTATION GROUP

TROLLEYBUS & SERIAL HYBRID BUS

Supercapacitors

Other possibility for effective energy management

= Accumulation of large energy volume in short time

= Quick discharge

= Recover of the beaking energy

Proven results from the projects:

Trolleybus for Roma - around 25% of energy saved

TriHyBus - improvement of dynamics paramaters of the bus

TRANSPORTATION GROUP

TROLLEYBUS & SERIAL HYBRID BUS

Traction batteries

Effective energy storage

= 100% emission free vehicle

= Flexible charging possibilities

= Reducement of the maintenance costs

Proven results from the projects:

Trolleybuses 12m – 18m, Hydrogen bus, Serial Hybrid bus

TRANSPORTATION GROUP

HYDROGEN BUS

- Full low floor 12m length bus

- Bus operation in city with frequent stops – electric powered city bus

- Unique solution of drive : Three sources of energy

1) Fuel cell – supplies continuously small power

2) Supercapacitors – supplies power peaks

3) Traction battery – supplies energy when is long time demand on power

- uphill drive, long distance drive and starts of FC system

Supercaps and traction batteries store energy in case of regenerative braking

Fuel cell is environmental friendly – no smoke in exhaust

– no dust

TRANSPORTATION GROUP

ADVANCED POWER MANAGEMENT

Learning bus

APM

Modification of energy flow according to route profile

= energy savings

= optimization of operational parameters

Thank you

for your attention

ŠKODA ELECTRIC a.s.

Tylova 1/57, 301 28 Plzeň

Tel.: + 420 359 409 816

Fax: + 420 359 409 820

petr.kasencak@skoda.cz