Study of Canceling Onboard Braking Resistance in Urban Rail

The utilization of regenerative braking energy (RBE) has attracted lots of studies. The onboard braking resistance (OBR) can consume RBE, but RBE will be wasted. With the development of RBE utilization devices like energy feedback system (EFS), the canceling of OBR is the general trend in the future design of urban rail. To accurately simulate the system, the AC/DC power flow calculation algorithm is improved, and it can be applied in the system with and without OBR. A sample case is studied. First, the accuracy of the algorithm is verified through the field test. Then, the single-pair departure and high-density departure scenarios are studied. The results show that when EFSs are installed at each traction substation, the rail voltage is in the safe range when OBR is canceled.