RU196100U1 - DEVICE FOR CONTINUOUS MONITORING AND CONTROL OF OPERATION EQUIPMENT OF POWER ELECTRICAL SUBSTATION UNDER CONDITIONS OF OPERATION - Google Patents

Abstract

The technical solution relates to the field of measurement and control of equipment operating modes, therefore, it can be used to measure partial discharge signals and dielectric losses in the electrical insulation of live parts of three-phase high-voltage devices under operating voltage for the purpose of comprehensive diagnostics of defects and prediction of residual life with the possibility of regulating operating modes electrical equipment. A device for continuous monitoring and control of operating modes of electrical equipment power electrical substation in operating conditions, consisting of an active part in the form of a system of conductive, electrically connected elements that are under high voltage and surrounded by insulation layers, containing processing and recording partial discharge signal, and at least one partial signal pickup sensor discharges, switch, and probes connected to controlled devices and to the inputs of the switch, probes connecting the switch directly to measuring transformers bypassing capacitive castors, an analyzer of dielectric losses and capacities, an analog-to-digital converter, a microprocessor control unit, a thyristor frequency converter with a tunable topology, the output of the analyzer of dielectric losses and capacitance connected to the input of an analog-to-digital converter, the output of which is connected to the input of the microprocessor control unit, the outputs of which are connected to the input of the switch and the input of the thyristor frequency converter with a tunable topology. that when implementing the claimed solution acts more effective monitoring and management modes of electrical equipment. 1 ill.

Description

The technical solution relates to the field of measurement and control of equipment operating modes, therefore, it can be used to measure partial discharge signals and dielectric losses in the electrical insulation of live parts of three-phase high-voltage devices under operating voltage for the purpose of comprehensive diagnostics of defects and prediction of residual life with the possibility of regulating operating modes electrical equipment.

The device, RF patent No. 2393494, IPC ⁸ G01R 31/02, publ. Bull. No. 18 dated 06/27/2010. A device for the continuous monitoring of partial discharges in the insulation of three-phase high-voltage devices under operating conditions, consisting of at least an active part in the form of a system of electrically connected elements connected under high voltage and surrounded by insulation layers containing the processing and registration of the partial discharge signal and at least one sensor-receiver of the partial discharge signal, an active h is used as the sensor-receiver of the partial discharge signals part of a three-phase high-voltage apparatus, and the measurement of partial discharge signals is performed simultaneously on all three phases of a high-voltage discharge at the common point of the active part of this apparatus using low-voltage voltage transformers connected according to an open-triangle diagram.

The disadvantage of the claimed analogue is the lack of the ability to quickly switch from monitoring the system of elements of the substation to the control of single high-voltage devices included in this system. As well as an analysis of only one indicator of wear of electrical equipment and the impossibility of promptly changing the configuration of the partial discharge registration scheme: for working with high-voltage devices without capacitive dividers and for working with devices in which capacitive dividers are provided for by design. The consequence of these shortcomings is the rather low diagnostic rate of electrical devices of a power substation.

The closest technical solution for the inventive device for continuous monitoring and control of the operating modes of the electrical equipment of a power substation under operating conditions can be considered a device, RF patent No. 178348, IPC ⁸ G01R 31/02, publ. Bull. No. 10 dated March 30, 2018. A device for continuously monitoring the signal of partial discharges and detecting their source at a power substation under operating conditions consists of at least the active part in the form of a system of electrically connected elements connected under high voltage and surrounded by isolation layers containing the processing and registration of the partial discharge signal and at least one sensor-receiver of the partial discharge signal, the switch and probes connected to the controlled devices and switch inputs, and probes connecting the switch directly to instrument transformers, bypassing the capacitive dividers.

The disadvantage of the claimed prototype is the lack of effective control of the technical condition of electrical equipment and the lack of control of its operating modes.

The objective is to increase the efficiency of monitoring and control of the operating modes of electrical equipment.

The essence of the proposed technical solution lies in the fact that in the device for continuous monitoring and control of the operating modes of the electrical equipment of the power substation in operating conditions, consisting of the active part in the form of a system of conductive electrically interconnected elements that are under high voltage and surrounded by insulation layers, containing circuits processing and registration of a partial discharge signal, and at least one sensor-receiver of a partial discharge signal, a switch, and probes, we connect connected to the controlled devices and to the inputs of the switch, probes connecting the switch directly to the measuring transformers, bypassing the capacitive dividers, an additional dielectric loss and capacitance analyzer, an analog-to-digital converter, a microprocessor control unit, a thyristor frequency converter with a tunable topology are introduced, and the analyzer output dielectric loss and capacitance is connected to the input of the analog-to-digital converter, the output of which is connected to the input of the microprocessor control unit Niya, the outputs of which are connected to the input of the switch and the input of the thyristor frequency converter with reconfigurable topology.

The figure shows a diagram of a device for continuous monitoring and control of operating modes of electrical equipment of a power electrical substation in operating conditions.

The device for continuous monitoring and control of the operating modes of the electrical equipment of the power substation in operating conditions contains 1.2 active parts of the high-voltage device, 3 probes connected to the active part of the high-voltage device and to the input of the switch 4. The probes 5 are connected to high-voltage devices without built-in capacitive dividers and to the input of the switch 4. The probes 6 are connected to high-voltage devices with a built-in capacitive divider and to the input of the switch 4. The outputs of the switch 4 are connected to the measurement inputs x transformers 8 directly, bypassing the capacitive dividers 7. The outputs of the partial discharge recorder 9 and the dielectric loss analyzer and capacitance 10 are connected to the input of the analog-to-digital converter 11. The output of the analog-to-digital converter 11 is connected to the input of the microprocessor control unit 12, the outputs of which are in the queue is connected to the input of the switch 4 and to the input of the thyristor frequency converter with a tunable topology 13.

The system of the device for continuous monitoring and control of the operating modes of the electrical equipment of the power substation in operating conditions is as follows. In the local part of the partial discharge center in the insulation region surrounding the active part of high-voltage devices, current pulses of partial discharges occur under the action of high voltage. These pulses induce pulsed partial discharge currents in the active part of high-voltage devices 1 and, therefore, in buses 2, through the probes 3, the signal is fed to the input of the switch 4, then through the switch 4 it goes to the capacitive dividers 7, and from them to the measuring transformers 8, the windings which are connected according to the "open triangle". Included in the gap of the "triangle" the partial discharge recorder 9 measures the signal level of these partial discharges against the background of noise and interference. Then, the signal from the partial discharge recorder 9, as well as from the analyzer of dielectric losses and capacitance 10, is fed through an analog-to-digital converter 11 to the input of the microprocessor control unit 12, which, on the basis of the analysis of the obtained data, predicts the residual resource of the electrical equipment, and then gives a control action to the input a thyristor frequency converter with a tunable topology 13, which, on the basis of forecasting data, either leaves the initial power supply mode for electrical equipment or switches the power mode of electrical equipment to reduce the consumption of residual life, and to the input of switch 4, which either leaves the circuit in its original form, or when the level of partial signals or dielectric losses differs from the norm for a given substation, disconnects from the circuit the common control point of the substation and begins the alternate control of devices included in the structure of the substation. When switching between monitored devices, their design features are taken into account: for devices without built-in capacitive dividers in the structure, the appropriate circuit is used - probes 5 are used for control and signals are fed to the corresponding input of the switch 4, and for devices with built-in capacitive dividers, a circuit in which they are used probes 6 and signals are fed to the input of the partial discharge recorder 9 bypassing the capacitive dividers 7 of this device.

The result of using this technical solution will be the ability to predict the residual life of electrical equipment based on integrated diagnostics, which provides more efficient control of operating modes and timely replacement of electrical equipment that needs it.

Claims (1)

A device for continuous monitoring and control of operating modes of electrical equipment of a power substation in operating conditions, consisting of an active part in the form of a system of conductive, electrically connected elements that are under high voltage and surrounded by insulation layers, containing circuits for processing and recording a partial discharge signal and at least one sensor-receiver of the partial discharge signal, the switch and probes connected to the monitored devices and to the inputs of the switch, probes connecting e switch directly with measuring transformers bypassing the capacitive dividers, characterized in that an additional analyzer of dielectric loss and capacitance, an analog-to-digital converter, microprocessor control unit, thyristor frequency converter with a tunable topology are introduced, and the output of the analyzer of dielectric loss and capacitance is connected to the analog input -digital converter, the output of which is connected to the input of the microprocessor control unit, the outputs of which are connected to the input of the switch and the input of a thyristor frequency converter with a tunable topology.

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