Abstract
The issue of electric energy saving in public transport is currently becoming a key area of interest, a fact connected with both an increase in society’s environmental awareness and a rise in the prices of fuel and electricity. Electricity can be saved by reducing transmission losses in the supply system. The article presents a method of measurement and analysis of transmission losses in the supply system of electrified public transport on the example of trolleybus transport in Gdynia and Lublin in Poland.
Highlights
The development of zero-emission public transport is one of the elements of the EU’s horizontal policy
The method presented allows measurement of transmission losses in traction supply system, which requires the registration of the vehicle current, vehicle supply voltage, substation voltage and the GPS localisation of the vehicle
The method can be used for diagnostic purposes of supply systems and energy efficiency assessment as part of the energetic audit of the public transport system
Summary
The development of zero-emission public transport is one of the elements of the EU’s horizontal policy. Municipal transport is currently responsible for 40% of CO2 emissions of the entire road transport in Europe. The transport sector is responsible for 30% of total energy consumption and 27% of greenhouse gas emissions. Using more alternative energy sources in public transport becomes necessary. Electricity is an alternative to liquid fuels. The development of electric means of transport is actively supported by the European authorities, as evidenced e.g. by funding initiatives popularising ecological municipal transport systems from the Community budget. Examples of such projects are Trolley, Actuate, Dyn@mo and Osiris [Połom and Palmowski 2009; Połom and Bartłomiejczyk 2011] which focused on the development of energy-saving technologies applied in them
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