RU112528U1 - AUTOMATED INFORMATION-MEASURING SYSTEM FOR RESOURCE RESOURCES INSULATION FOR POWER TRANSFORMER - Google Patents

Abstract

An automated information and measuring system for monitoring the insulation resource of a power transformer, containing a module for monitoring the insulation resource of a power transformer, which includes a series-connected control unit for the cooling system of a power transformer and a power transformer, m information outputs of which are connected to the corresponding m inputs of the measuring unit, a block of collection and transmission devices data and control, a collecting computer, a server and a dispatching unit, characterized in that the system contains workstations, a corporate network and n structurally identical local information and measurement modules for monitoring the insulation resource of a power transformer, each of which additionally has a meteorological station connected by an output through a unidirectional public access communication channel with unique identification addresses with the (m + 1) -th input of the measuring unit, and the block of data collection and transmission and control devices is connected by means of a unidirectional o public communication channel with unique identification addresses with the output of the measuring unit and through bidirectional public communication channels with unique identification addresses connected to the control unit of the power transformer cooling system, to the collector computer, to the dispatching unit and to the data collection and transmission units control of all other local information and measurement modules for monitoring the insulation resource of the power transformer, while the server is connected via bidirectional public access communication channels with unique identification

Description

The utility model relates to electrical engineering and can be used to control the technical condition of power transformers under operating conditions.

It is known "Device for predicting the consumption of transformer insulation resource" (USSR Author's Certificate No. 1000937, G01R 31/00, G01R 31/06, 1983), which contains a single-phase electric energy meter, the potential winding of which is connected in series to a power source and temperature controller environment, and connected to the current winding of the meter are a series-connected set block of the proposed transformer load schedule, a switch, an exponential converter, and a current amplifier. The device simulates the thermal process in a transformer using an electrical circuit consisting of RC circuits.

The disadvantage of this device is the lack of measurement of the real parameters of the power transformer, and, consequently, the lack of the ability to control the insulation resource of the transformer.

Closest to the claimed is a "Device for monitoring power transformers" (RF Patent No. 22428301, Н02Н 7/04. Н02Н 6/00, 2004), adopted as a prototype. The device’s action is based on real-time monitoring of the set of operating parameters of the power transformer and calculation of the integral characteristics of the power transformer with subsequent data transfer to automated dispatch control systems (ACSE) and electricity metering (ASUE). The device contains a module for monitoring the insulation resource of the power transformer, which includes a serially connected control unit for the cooling system of the power transformer and a power transformer, “m” of information outputs of which are connected to the corresponding “m” inputs of the measuring unit, a block of data acquisition and control devices, a computer collector, server and dispatch block. The device provides control over the values of instantaneous, average and effective values of currents and voltages and temperature in the windings of high, medium and low voltage, ambient temperature, transformer oil at the inlet and outlet of coolers, temperature, level, oil pressure, its humidity and concentration of dissolved gases in oil in the tanks of the transformer and on-load tap-changer, oil pressure in high-voltage bushings, leakage currents in insulation.

The disadvantage of this device is the limited functionality due to monitoring of only one power transformer, and the incomplete use of diagnostic parameters and influencing factors that describe the physical processes in the equipment when exposed to operational factors, which does not allow to reliably determine the insulation resource of the power transformer, as well as insufficient reliability due to the lack of redundancy of data transmission channels.

The technical result of the claimed utility model is to expand the functionality and increase reliability.

The specified result is achieved by the fact that the automated information-measuring system for monitoring the insulation resource of the power transformer, comprising a module for monitoring the insulation resource of the power transformer, which includes a serially connected control unit for the cooling system of the power transformer and a power transformer, the “m” information outputs of which are connected to the corresponding “m "The inputs of the measuring unit, the unit of data acquisition and control and control devices, the collection computer, the server and the display unit techerization, additionally contains workstations, a corporate network and “n” structurally identical local information-measuring modules for monitoring the insulation resource of the power transformer, in each of which an additional weather station is introduced, connected via a unidirectional shared communication channel with unique identification addresses with (m +1) -th input of the measuring unit, and the unit of data collection, transmission and control devices is connected via a unidirectional communication channel with a unique connected to the control unit of the power transformer cooling system, to the collector computer, to the scheduling unit and to the units of the data collection and transmission devices and to control all other local information and communication identifiers with the output of the measuring unit and through bi-directional shared communication channels with unique identification addresses measuring modules for monitoring the insulation resource of the power transformer, while the server is connected via bi-directional communication channels of a common access with unique identification addresses on a corporate network with workstations, with a dispatching unit and with collector computers of local information-measuring modules for monitoring the insulation resource of a power transformer.

The drawing shows a block diagram of the proposed utility model.

An automated information-measuring system for monitoring the insulation resource of a power transformer contains workstations 1, a corporate network 2, “n” structurally identical local information-measuring modules for monitoring the insulation resource 3 _{i of a} power transformer, each of which includes a 4 _i cooling system control unit connected in series a power transformer and a power transformer 5 _i, «m» of information outputs of which are connected to the corresponding «m» inputs of the measuring unit 6 _i, yc block roystv data acquisition and transmission control 7 _i, computer-collector 8 _i, and the server 9, the scheduling unit 10 and the weather station 11, the output connected through a shared bearer connection with a unique identification address (m + 1) th measurement input unit 6 _i , where m is the number of diagnostic parameters of the power transformer 5 _i . The data acquisition and control unit 7 _i is connected via a unidirectional shared communication channel with unique identification addresses to the output of the measuring unit 6 _i and through bi-directional shared communication channels with unique identification addresses is connected to the control unit of the cooling system 4 _{i of the} power transformer, with computer-collector 8 _i, a scheduling unit 10, and devices with blocks of data acquisition and transmission control 7 _{i (i} = l ÷ n) all other local information was measured -negative control resource modules 3 _i insulation of the power transformer. Server 9 is connected via bi-directional shared communication channels with unique identification addresses on the corporate network 2 to workstations 1, to the scheduling unit 10, and to collector computers 8 _{i of the} local information-measuring modules for monitoring the insulation resource 3 _{i of the} power transformer.

Automated information-measuring system for monitoring the insulation resource of a power transformer works as follows.

In each local information-measuring module for monitoring the insulation resource 3 _{i of the} power transformer using the measuring unit 6 _i , the diagnostic parameters of the power transformer 5 _i are measured, namely:

1. load currents of the power transformer 5 _i ;

2. oil temperature at the top of the tank;

3. oil level in the tank;

4. oil pressure in the tank;

5. gas content of oil in the tank;

6. moisture content of the oil in the tank;

7. winding temperature;

8. oil temperature at the inlet and outlet of the cooling system;

9. duration of overheating of the windings (excess of current in the winding over the normalized value);

10. temperature, humidity, outdoor air pressure, wind direction and speed;

11. The intensity of partial discharges (PD);

12. short circuit currents;

13. voltage on the windings of the power transformer 5 _i ;

14. The value of the dielectric loss tangent of the insulation of high voltage bushings;

15. oil pressure in high voltage bushings;

16. insulation capacity of high voltage bushings;

17. The number of switching the voltage regulator under load (on-load tap-changer);

18. oil temperature in on-load tap-changer;

19. oil pressure in on-load tap-changer;

20. oil level in on-load tap-changer;

21. currents of engines of oil pumps of the cooling system;

22. currents of engines of fans of the cooling system;

23. number of starts of engines for oil pumps of the cooling system;

24. number of starts of engines of fans of the cooling system;

25. correspondence of the number of on-load tap-changer contacts to their position during on-load tap-changer switching;

26. vibration level of the windings of the power transformer 5 _i .

Weather station 11 _i controls atmospheric conditions

The measurement results on a unidirectional communication channel with a unique identification addresses (for example, GSM / GPRS, SMS, radio channel, etc.) are transmitted to the block of data acquisition and control devices 7 _i , where they are systematized and, upon request, sent to the computer- collector 8 _i .

The 7 _i control unit for data transmission and control, acting on bi-directional shared communication channels with unique identification addresses (for example, GSM / GPRS, SMS, radio channel, etc.) on the control unit of the 4 _i cooling system of the power transformer, provides stabilization temperature regime of the power transformer 5 _i , for example, by regulating the speed of the engines of oil pumps and fans of the cooling system of the power transformer, and also provides remote control of the system We are cooling power transformer.

The collecting computer 8 _i performs the initial analysis and presentation in the necessary tabular and graphical form of the received information, and then forwards it via a bi-directional shared communication channel with unique identification addresses and corporate network 2 to server 9, where the data is archived and made available to workstations 1 , as well as the dispatch unit 10.

The scheduling unit 10 provides operational control and remote control "n" of the local information-measuring modules for monitoring the insulation resource 3 _{i of the} power transformer.

Workstations 1 directly simulate the processes occurring in the power transformer 5 _i , calculate the resource of its isolation, and also develop measures to increase the service life of the power transformer 5 _i .

In the event of a pre-emergency or emergency situation on the power transformer 5 _i, the data collection and control unit 7 _i quickly transmits information about this via a bi-directional public access channel with unique identification addresses directly to the dispatching unit 10, which increases the efficiency of taking the necessary measures to prevent or eliminating an emergency.

In addition, the ability to exchange data between units of data acquisition and control devices 7 _i various local information and measurement modules for monitoring the isolation resource 3 _{i of a} power transformer via bidirectional communication channels with unique identification addresses significantly increases the reliability and efficiency of information delivery to server 9 in case of failure of any communication channels or collector computers 8 _i .

Thus, an automated information-measuring system for monitoring the insulation resource of a power transformer provides the claimed technical result - expanding functionality and increasing reliability.

Claims (1)

An automated information-measuring system for monitoring the insulation resource of a power transformer, comprising a module for monitoring the insulation resource of a power transformer, which includes a series-connected control unit for the cooling system of the power transformer and a power transformer, m information outputs of which are connected to the corresponding m inputs of the measuring unit, a block of collection and transmission devices data and control, a collection computer, a server and a scheduling unit, characterized in that the system It employs workstations, a corporate network, and n structurally identical local information-measuring modules for monitoring the insulation resource of a power transformer, each of which additionally has a weather station connected via an unidirectional shared communication channel with unique identification addresses with (m + 1) -m the input of the measuring block, and the block of devices for collecting, transmitting data and control is connected via a unidirectional communication channel of general access with unique identification addresses with the output of the measuring unit and through bi-directional communication channels of general access with unique identification addresses, it is connected to the control unit of the cooling system of the power transformer, to the collecting computer, to the scheduling unit, and to the units for collecting and transmitting data and controlling all other local information-measuring modules monitoring the isolation resource of the power transformer, while the server is connected through bi-directional communication channels with a unique access ionic addresses in the corporate network workstations with block scheduling and computer-assemblers local information resource control measurement modules isolation power transformer.