Contactless galvano-magnetics transducers of monitoring and control systems in agricultural energy

Abstract

The paper provides information on the state of the use of direct current energy in the electric power industry of agriculture and water resource, hydraulic engineering, industry and metallurgy, irrigation, and land reclamation. Identified the need for contactless non-destructive testing of large constant currents in high-power electrical installations in irrigation, land reclamation, and hydraulic engineering. The basic requirements for contactless transducers and meters of large direct currents in circuits without breaking them are shown. Identified priority areas in the development of these transducers. The general principles of constructing contactless ferromagnetic transducers of large direct currents also the basic requirements for them and the results of the development of one of the options for the development of effective innovative galvano-magnetic contactless transducers of large direct currents with an expanded range of monitoring and control systems for powerful pumping stations in water supply and land reclamation are presented. To increase the sensitivity of galvanomagnetic contactless transducers of large direct currents, Hall transducers have supplied with short-term rectangular current pulses from a special generator. When measuring the amplitude values of the rectified current, in this case of galvanomagnetic contactless transducers, the supply of pulses of the control current of the Hall transducers with the converted current in the bus synchronization is provided. This is achieved by supplying galvano-magnetic contactless transducers of large direct currents with a magnetically controlled contact located near the bus with the converted current and included in the circuit of the current electrodes of the Hall transducers. A static characteristic of the developed galvano-magnetic contactless transducer of high currents obtained and its main technical characteristics and parameters are given. It is shown that the developed transducer, unlike the known ones, has increased accuracy and sensitivity, a technological design, and low weight and dimensions at low material consumption and cost. It can be widely used in electrical systems in land reclamation and irrigation, in water supply, industry, rail transport, science, technology, and for checking electric meters at the installation site.

Diagnostics of power transformers operating for many years in the power supply system through gases in the composition of transformer oil

“…It is possible to use new innovative solutions for the current transformer installed in the shortcircuit circuit. Under the leadership of Plakhtiev A.M. work is underway to create a new generation of current measuring devices and articles [8][9] show the results of the development of various options proposed by researchers, universal multidisciplinary non-contact magnetomodulation converters of large direct and alternating currents with an extended range for monitoring and control systems in the electric power industry of solar power plants, solar power plants, with direct conversion of solar energy into electrical energy using photo-and thermoelectric conversions, renewable energy sources, laser installations, as well as in industry, agriculture and water management. They differ from the well-known extended controllable range with small dimensions and weight.…”