Load flow study and conceptual system design of SEPTA´s regional rail division traction power system

The purpose of this study was to develop a configuration of the modernized traction power supply system formerly owned by the Reading Railroad and recommend the most appropriate method for implementation of the proposed system. Load flow studies were performed to evaluate the system performance taking into account projected traffic density. Based on these studies, conceptual system design was performed which included development of procurement specifications for modern switchgear to be used in Wayne Junction and all autotransformer substations. In order to help realize the system modernization, an implementation plan spanning 12 years has been prepared. The plan identified issues to be resolved so that system modernization may proceed and included criteria for executing the system upgrade. Based on those criteria it was concluded that the system modernization should be performed with the following priorities: (1) the Wayne Junction substation modernization should be completed as soon as possible; (2) all existing autotransformer substations should be replaced; and (3) design and installation of additional static frequency converters will be required as the traffic approaches the projected density and the planned electrification extensions are realized. In order to help SEPTA with planning of the modernization program, budgetary construction costs for the new facilities were estimated. Combining the cost estimates and the 12-year implementation schedule, cash flow analyses were developed for present dollars and for dollars escalated to mid-point of construction of each facility