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Energy-saving coordination of traffic of some trams driven by induction motors

Rawicki S., Nowak M.

Poznan University of Technology Academic Journals. Electrical Engineering

2016

No. 85

447--457

The paper deals with new software ensuring the ride of some interdependent tram vehicles in accordance with the criterion of the minimum energy consumption. All trams have been driven by vectorially controlled and field oriented three-phase induction motors supplied from the modern inverters. First of all, the influence of light signalling on the coordinated energy-saving traffic of trams has been taken into consideration. In one example there was shown the possible case for three trams ride free from the possibility of collisions. Here the energy savings were the biggest. Every time it is very difficult to ensure the green light for every tram vehicle at the same crossing. There were analysed two variants of disturbances caused by the light signalling: additional short and long tram stop. In the instance of large time lags of the traffic, the ride delay must be liquidated during the run between some succeeding stops.

Algorytmy energooszczędnej likwidacji dużych opóźnień w ruchu pojazdów tramwajowych z silnikami indukcyjnymi

Rawicki S., Brodnicki D., Chyła K., Nowak M., Pluciński A.

Maszyny Elektryczne : zeszyty problemowe

2012

Nr 1(94)

49-53

The paper deals with the original methodics of the computation of the energy-saving traffic of tram vehicles with the modern field-oriented control of traction three-phase induction squirrel-cage motors. Possibility of occurrence of various traffic perturbations is here taken into account. After ending disturbances of the city traffic, algorithms of tram rides take into account the procedure of traffic-delay liquidation in accordance with the criterion of the minimum energy use. During the vehicle running with the constant speed, the load of traction induction motors is relatively small; in this case the proper choice of the lower supply voltage enables to increase the motor efficiency. At large time lags in traffic of tram vehicles, ride delays must be liquidated during the run between some succeeding stops within the framework of the optimization procedure.