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Power supply for monitoring and metering devices of DC traction network based on serial chain of voltage converters

When designing devices for monitoring and accounting of electric energy for railway traction networks of direct current, one of the main tasks is to create a source for their power supply. The paper considers the problems that arise when using power sources from the network of own needs of a traction substation, reviews the main technical solutions of sources powered from the traction network, and also offers an original solution that has a high efficiency compared to its prototype