The scheme realization for the indirect metering of energy losses in a contact line

The volume of energy losses in electric grids is showed problems which need emergency solutions in development, reconstruction and technical modernization of power networks, improved methods and tools for their operation and management in improving the accuracy of electricity metering, fundraising efficiency for electricity consumed etc. The relative energy losses in electric networks can be considered satisfactory, if they do not exceed 4-5 %. Energy losses of 10 % can be considered the maximum acceptable in terms of process of transmission of electric power by networks. Determination of energy losses in the contact line of electrified railways has a number of features that are primarily caused by variable size and location of the load which does not take into account a number of factors that affect the magnitude of losses. The indirect method of energy losses metering is based on the register values of per square ampere-hours on the feeders of traction substations. The meter of energy losses shows value of energy losses depending on the measured in the unit of time next factors. They are square ampere-hours, calculated energy losses coefficient, measurement period of energy losses and the square of the actual conversion coefficient. The matching device for analog microcircuits AD637 and AD633 was used as the realization of the circuit of the device as part of the measuring complex with the analyzer power Satec EDL-175. These analog microcircuits are done determination of the RMS value and multiplication of signals with the agreement of the input and output signals by the precision operational amplifiers OP-07. Using the developed device allowed to determine energy losses in the contact line in the real distance with an error not exceeding 5.4%.