KR100728761B1 - Method for monitoring partial discharge and inter layer short of high voltage circulator - Google Patents

Abstract

A method for monitoring partial discharge and interlayer short circuit of a high voltage circulator is provided to prevent previously defects by monitoring a partial discharge signal of a stator and an interlayer short circuit signal of a rotator. A partial discharge sensor detects a partial discharge signal of a stator and an interlayer short circuit sensor detects an interlayer short circuit signal of a rotator(S410). A first data collection unit converts the detected partial discharge signal into a data necessary for monitoring(S420). A second data collection unit converts the detected interlayer short circuit signal into a data necessary for monitoring(S430). A server collects the partial discharge signal and the interlayer short circuit signal in order to analyze and control the partial discharge signal and the interlayer short circuit signal and thus display the results(S440).

Description

METHODS FOR MONITORING PARTIAL DISCHARGE AND INTER LAYER SHORT OF HIGH VOLTAGE CIRCULATOR}

1 is a view showing the configuration of a partial discharge and interlayer short circuit monitoring system of a high-pressure rotary device applied to the present invention.

2 is a diagram showing an example of installation of contact and non-contact sensors to be applied to the present invention.

Figure 3 is a block diagram showing in detail the first DAQ applied to the present invention.

Figure 4 is a block diagram specifically showing a second DAQ applied to the present invention.

5 is a block diagram showing a specific configuration of a server applied to the present invention.

Figure 6 is a flow chart showing a partial discharge and interlayer short circuit monitoring method of the high-pressure rotary apparatus according to the present invention.

7 is a flowchart illustrating a subroutine of step S420 of FIG. 6.

8 is a flowchart illustrating a subroutine of step S430 of FIG. 6.

9 is a view showing an example of a comprehensive monitoring screen displayed on the server and the user computer according to the present invention.

10 is a view showing an example of the partial discharge analysis screen displayed on the server and the user computer according to the present invention.

11 is a view showing an example of an interlayer short analysis screen displayed on a server and a user computer according to the present invention.

* Explanation of symbols for main parts of drawings *

110: rotor 120: stator

121: Floor short detection sensor 122: Partial discharge detection sensor

150: coaxial cable 200: data acquisition device

250: communication line 300: server

301: input unit 303: storage unit

305: control unit 307: output unit

309: transmission unit 310: user computer

The present invention relates to a partial discharge and an interlayer short circuit monitoring method of a high-pressure rotating device, and more particularly, whether or not the partial discharge of the stator used in the high-voltage rotating device including a generator and an electric motor, and whether the rotor is between the short-circuit and short circuit. The present invention relates to a partial discharge and an interlayer short circuit monitoring method of a high-voltage rotating device that can be monitored in real time while the rotating device is in operation.

In general, a high-pressure rotating device including a motor that generates mechanical energy (mechanical movement) using electrical energy and a generator that generates electrical energy using mechanical energy is rotatable in the stator core. It is equipped with a rotor.

In recent years, as the demand for electric power increases, the high-voltage rotating apparatus becomes larger in size and ultra-high pressure, and when the high-capacity high-voltage rotating apparatus is operated for a long time, the partial discharge of the stator and the interlayer short circuit of the rotor become deep, In addition to the high cost of repair and long maintenance periods, there is an increasing need to prevent partial discharges caused by the stator of the high-voltage rotating apparatus and the short-circuit accident caused by the rotor.

That is, the sudden stop caused by deterioration due to long time operation of the high-pressure rotating device causes enormous problems, thus preventing the high-speed rotating device in real time in order to prevent such a sudden stop. Diagnosis is needed.

Meanwhile, the insulation resistance test, the polarity index test, the alternating current test, and the partial discharge test are used for the diagnosis of the conventional high voltage rotating device. Thus, the partial discharge of the stator of the high voltage rotating device and the interlayer short circuit of the rotor are diagnosed. In order to do this, there is a problem in that the high-pressure rotary device must be stopped.

The present invention has been made to solve the above problems, the purpose of the high-voltage rotary device is to operate the partial discharge signal of the stator and the interlayer short circuit signal of the rotor used in the high-pressure rotating device including a generator and an electric motor and the like It is to provide partial discharge and interlayer short circuit monitoring method of high pressure rotating equipment that can monitor in real time in real time and monitor the possibility of failure of high voltage rotating equipment.

Partial discharge and interlayer short monitoring method of the high-pressure rotating device according to the present invention for achieving the above object, (A) the partial discharge detection sensor 122 detects the partial discharge signal of the stator 120, interlayer short circuit Detecting, by the sensor 121, an interlayer short signal of the rotor 110 (S410); (B) acquiring, by the first data collecting device 210, the partial discharge generation signal detected by the partial discharge detection sensor 122, converting the data into data necessary for monitoring (S420); (C) Simultaneously with the step (B), the second data collecting device 220 acquires the interlayer short signal detected through the interlayer short detection sensor 121 and converts the interlayer short signal into data necessary for monitoring (S430). ; And (D) the server 300 collects the partial discharge signal and the interlayer short signal inputted to the input unit 301 through the steps (B) and (C), and analyzes and controls them through the control unit 305. And displaying the result related to the partial discharge and the interlayer short circuit through the unit 307 (S440), wherein the step (C) includes (C1) the signal controller 221 from the interlayer short circuit detection sensor 121. Converting the shape and characteristics of the output signal to accurately analyze the weak output signal without distortion (S431); (C2) a preamplifier 222 amplifying the magnitude of the interlayer short signal converted from the signal controller 221 to correct a magnitude reduction of the signal (S432); (C3) converting, by the A / D converter 223, the interlayer short signal corrected from the preamplifier 212 into digital data (S433); And (C4) the second CPU 224 transmitting the interlayer short signal analyzed through the steps (C1) to (C3) to the outside (S434).

Hereinafter, with reference to the accompanying drawings will be described in detail the partial discharge and the inter-layer short-circuit monitoring method of the high-pressure rotary machine according to the present invention.

1 is a view showing the configuration of a partial discharge and interlayer short monitoring system of a high-pressure rotary device to be applied to the present invention, Figure 2 is a view showing an installation example of the contact and contactless sensor applied to the present invention.

3 is a block diagram specifically illustrating a first DAQ applied to the present invention, and FIG. 4 is a block diagram specifically illustrating a second DAQ applied to the present invention.

5 is a block diagram showing a specific configuration of a server applied to the present invention.

As shown in Figure 1 and 2, the partial discharge and interlayer short circuit monitoring system of the high-pressure rotating device applied to the present invention, the rotor 110, the stator 120, the interlayer short circuit detection sensor 121, the partial discharge detection sensor Reference numeral 122, a coaxial cable 150, a data collection device 200, a communication line 250, a server 300, and a user computer 310.

Specifically, the interlayer short circuit detecting sensor 121 is installed on the stator 120 of the generator to detect a signal that can detect whether the interlayer short circuit of the rotor 110 winding.

The partial discharge detection sensor 122 is installed at the stator 120 of the generator or the output terminal side of the generator and the high-voltage motor to detect a signal capable of detecting whether the stator 120 has a partial discharge.

That is, the partial discharge sensor 122 is an EMC (Epoxy Mica Coupler) sensor, one or two of each phase (three-phase power) of the high-voltage AC power input terminal of the high-voltage rotating device including a generator and an electric motor directly. Connected, and extracts only the partial discharge signal of the high-voltage rotating device flowing from the high-voltage power supply line.

At this time, the partial discharge detection sensor 122 is connected to the output terminal side of the generator and the high-voltage motor, as shown in Figure 2 to easily detect the partial discharge signal no matter where the partial discharge occurs in the generator and the high-voltage motor stator. Can be contacted (EMC), and directly connected to the stator 120 uses a non-contact (SSC) discharge sensor safe for use.

The data acquisition device 200 (Data Aquisition; DAQ) is composed of the first DAQ (210) and the second DAQ (220), the partial discharge detection sensor 122 and the interlayer short circuit detection sensor 121 through the coaxial cable 150 The detected signal is acquired and converted into data necessary for monitoring and analysis.

Specifically, as shown in FIG. 3, the first DAQ 210 is a data acquisition device for acquiring a signal detected from the partial discharge sensor 122, and includes a multiplexer & signal conditioner 211, a preamplifier 212, A filter 213, a pulse shape analyzer 214, a comparator 215, a 60 Hz synchronizer 216, a first CPU 217, a D / A converter 218, and an output device 219.

That is, in the multiplexer & signal controller 211, the multiplexer outputs the output signal of each of the partial discharge detection sensors 122 installed in each phase (three-phase power supply) of the power input terminal of the high-voltage rotating device to the first DAQ 210. ) Function as a channel selector to select and analyze phase by phase, and the signal controller can accurately analyze the weak output signal from the partial discharge detection sensor 122 without distortion of the signal inside the first DAQ 210. To convert the shape and characteristics of the output signal.

The preamplifier 212 amplifies the magnitude of the partial discharge signal converted from the multiplexer & signal conditioner 211 to correct a magnitude reduction of the signal.

The filter 213 extracts only a signal having a frequency characteristic necessary for analysis in a frequency preset by the filter, that is, in a range of 1 MHz to 500 MHz, from the signal amplified by the preamplifier 212.

The pulse shape analyzer 214 classifies the partial discharge signal and the noise signal extracted through the filter 213 to extract only the partial discharge signal.

At this time, the comparison unit 215 compares the reference information in the first DAQ 210 and the partial discharge signal and outputs only the partial discharge signal.

Meanwhile, the 60 Hz synchronization unit 216 receives an AC power of 60 Hz to generate a 60 Hz signal using a trigger element, and synchronizes and outputs the partial discharge signal from the partial discharge detection sensor 122.

The first CPU 217 controls not only the signals from the comparator 215 and the 60 Hz synchronizer 216, but also the internal functions of the first DAQ 210 as a whole.

At this time, the D / A converter 218 converts the digital signal from the first CPU 217 into an analog signal in order to compare the partial discharge signal from the pulse shape analyzer 214 with reference information in the first DAQ 210. Let's do it.

The output device 219 transmits the partial discharge generation signal analyzed through the devices 211 to 218 to the outside, and includes an LCD display unit 219a, an LED display unit 219b, a relay contact point 219c, and a communication unit ( 219d).

Specifically, the LCD display unit 219a and the LED display unit 219b are devices for displaying whether the first DAQ 210 is partially discharged by using the LCD monitor and the LEDs, and the relay contact 219c provides a relay. It is a device for indicating whether or not using the partial discharge, the communication unit 219d transmits the partial discharge signal of the first DAQ 210 to the outside through the TCP / IP, RS-232 and RS-422 communication method.

Meanwhile, as shown in FIG. 4, the second DAQ 220 is a data acquisition device for acquiring a signal detected from the interlayer short detection sensor 121, and includes a signal controller 221, a preamplifier 222, and A /. The D converter 223, the second CPU 224, and the communication unit 225 are included.

The signal controller 221 converts the shape and characteristics of the output signal so that the weak output signal from the interlayer short detection sensor 121 can be accurately analyzed without distortion of the signal inside the second DAQ 220.

The preamplifier 212 corrects the magnitude of the signal by amplifying the magnitude of the interlayer short signal converted from the signal controller 221.

The A / D converter 223 converts the interlayer short signal corrected from the preamplifier 212 into digital data.

The second CPU 224 controls the internal functions of the second DAQ 210 as a whole.

The communication unit 225 is an apparatus for transmitting the interlayer short signal analyzed through the devices 221 to 224 to the outside, and interlayer of the second DAQ 220 through TCP / IP, RS-232, and RS-422 communication methods. Transmit short signal to outside.

Therefore, the communication line 250 is a concept including a communication unit 219d of the first DAQ 210 and a communication unit 225 of the second DAQ 220.

The server 300 collects and monitors partial discharge and interlayer short circuit occurrence signals from the data acquisition device 200 including the first DAQ 210 and the second DAQ 220 through the communication line 250, An apparatus for transmitting the partial discharge and the interlayer short circuit generation signal to the user computer 310 of each office, comprising: an input unit 301, a storage unit 303, a control unit 305, an output unit 307, and a transmission unit 309. It includes.

Specifically, the input unit 301 receives not only the partial discharge and the interlayer short signal from the data collection device 200, but also inputs various information necessary for monitoring the high speed rotating device.

That is, the input unit 301 is a means for receiving the partial discharge and the interlayer short signal through the communication line 250 from the data collection device 200, although not specifically shown in the drawing, input means such as a keyboard, a mouse, and a scanner The concept includes.

The storage unit 303 is a MMI (Man Machine Interface) program that can display the partial discharge and the interlayer short signal input through the input unit 301 in the form of various graphs, charts, reports, and the server 300 Store various application programs for operation.

The controller 305 not only controls the overall functions of the server 300, but also controls and executes input signals from the input unit 301 and various programs stored in the storage unit 303.

The output unit 307 displays various information such as various graphs and charts related to the partial discharge and the interlayer short circuit executed through the control unit 305.

The transmitter 309 transmits a result related to the partial discharge and the interlayer short circuit executed through the controller 305 to an external user computer 310.

In this case, the transmission unit 309 preferably transmits the results related to the partial discharge and the interlayer short circuit to an external computer 310 through a wired and WAP protocol such as TCP / IP protocol.

On the other hand, the server 300 and the external computer 310 as a computer device that can communicate with the Internet browser that can display web content, and includes a personal computer such as a desktop computer, a laptop computer, etc., at least It is recommended to include a Windows98 or higher operating system, a pentium or higher CPU, or 64Mb or more memory.

In addition, in the present specification, the external user computer 310 is described as the above-described computer device. However, as long as it is possible to monitor various information related to the partial discharge and the interlayer short provided by the server 300, PDA, wireless Of course, it can be a mobile phone or an IMT-2000 capable of internet communication.

Hereinafter, with reference to the above-described system and Figures 6 to 11, the partial discharge and interlayer short-circuit monitoring method of the high-pressure rotary machine according to the present invention will be described in detail.

6 is a flowchart illustrating a method of monitoring a partial discharge and an interlayer short circuit of a high-pressure rotating device according to the present invention, FIG. 7 is a flowchart illustrating a subroutine of step S420 of FIG. 6, and FIG. 8 is a subroutine of step S430 of FIG. 6. It is a flow chart showing.

9 is a view showing an example of a comprehensive monitoring screen displayed on the server and the user computer according to the present invention, Figure 10 is a view showing an example of the partial discharge analysis screen displayed on the server and the user computer according to the present invention. 11 is a diagram illustrating an example of an interlayer short analysis screen displayed on a service and a user computer according to the present invention.

First, the partial discharge detection sensor 122 detects the partial discharge signal of the stator 120 and at the same time, the interlayer short detection sensor 121 detects the interlayer short signal of the rotor 110 (S410).

Thereafter, the data acquisition device 200 acquires the partial discharge generation signal detected from the partial discharge detection sensor 122 through the first DAQ 210, converts the data into data necessary for monitoring and analysis, and outputs the data (S420). After acquiring the interlayer short signal detected from the interlayer short detection sensor 121 through the second DAQ 220, the data is converted into data necessary for monitoring and analysis, and then output (S430).

In this case, after the first DAQ 210 acquires the partial discharge generation signal detected from the partial discharge detection sensor 122, converting the data into data necessary for monitoring and analysis (S420) includes the following procedure. .

1. The multiplexer & signal controller 211 selects and analyzes an output signal of each of the partial discharge detection sensors 122 installed on each phase, and simultaneously converts the shape and characteristics of the output signal (S421). ).

2. The preamplifier 212 amplifies the magnitude of the partial discharge signal converted from the multiplexer & signal conditioner 211 to correct a magnitude reduction of the signal (S422).

3. From the signal amplified by the preamplifier 212, the filter 213 extracts only a signal having a frequency characteristic necessary for monitoring and analysis (S423).

4. The pulse shape analyzer 214 separates the partial discharge signal and the noise signal extracted through the filter 213 and extracts only the partial discharge signal (S424).

5. The comparison unit 215 compares the reference information in the first data collecting device 210 with the partial discharge signal from the pulse shape analyzer 214 and outputs only the partial discharge signal (S425).

6. The 60Hz synchronization unit 216 synchronizes and outputs the partial discharge signal from the partial discharge detection sensor 122 to a 60Hz signal (S426).

7. After the first CPU 217 controls the signals from the comparator 215 and the 60Hz synchronization unit 216, the partial discharge signal from the pulse shape analyzer 214 is stored in the first DAQ 210. Only the partial discharge signal is extracted in comparison with the reference information (S427).

In this case, in order to compare the partial discharge signal from the pulse shape analyzer 214 with reference information in the first DAQ 210, the D / A converter 218 converts the digital signal from the first CPU 217 into an analog signal. To.

8. The output device 219 transmits the partial discharge generation signal analyzed through steps S421 to S427 to the outside (S428).

On the other hand, after the second DAQ 220 acquires the interlayer short signal detected from the interlayer short detection sensor 121, converting the data into data necessary for monitoring and analysis (S430) includes the following procedure.

I. The signal controller 221 converts the shape and characteristics of the output signal to accurately analyze the weak output signal from the interlayer short detection sensor 121 without distortion (S431).

II. The preamplifier 222 amplifies the magnitude of the interlayer short signal converted from the signal conditioner 221 to correct attenuation of the signal (S432).

III. The A / D converter 223 converts the interlayer short signal corrected from the preamplifier 212 into digital data (S433).

Ⅳ. The second CPU 224 transmits the interlayer short signal analyzed through steps S431 to S433 to the outside through the communication unit 225 (S434).

On the other hand, after the step S420 and S430, the server 300 collects the partial discharge signal and the interlayer short signal input to the input unit 301 through the communication line 250, and analyzed and controlled through the control unit 305, The output unit 307 is displayed in the form of various graphs and charts (S440).

At the same time, the server 300 transmits a result related to the partial discharge signal and the interlayer short circuit to the external user computer 310 through the transmitter 309 (S450).

Specifically, as shown in FIG. 9, the server 300 receives a partial discharge and an interlayer short circuit generation signal from the data collection device 200 to generate a generation size Qm and a generation amount NQN of the partial discharge generated. Partial discharge monitoring and inter-layer short-circuit monitoring of high-voltage rotating equipment, such as occurrence trends, status of short-circuit shorts, interlayer short-wave acquisition waveforms and short-circuit rates, can be monitored in real time.

In addition, as shown in FIG. 10, the server 300 may analyze the partial discharge of the stator of the high-voltage rotating apparatus through two-dimensional and three-dimensional analysis through the sine wave transition inspection through the real-time detailed monitoring function, as shown in FIG. 11. As described above, the interlayer short circuit of the rotor of the high-pressure rotating apparatus can be analyzed by comparing the waveforms of the N pole and the S pole.

Accordingly, the user computer 310 receives the partial discharge and interlayer short signals detected by the interlayer short detection sensor 121 and the partial discharge detection sensor 122 from the data collection device 200 and the server 300, and rotates the high pressure. The rotor and stator of the device can be monitored in real time for partial discharge and interlayer short circuit.

Although the present invention has been described above according to an embodiment of the present invention, a person skilled in the art to which the present invention belongs has changed and modified within the scope without departing from the technical spirit of the present invention. Of course.

As described above, according to the method of monitoring the partial discharge and the interlayer short circuit of the high-voltage rotating apparatus according to the present invention, the partial discharge signal of the stator and the interlayer short-circuit signal of the rotor, which are used in the high-voltage rotating apparatus including a generator and an electric motor, and the like By monitoring in real time while the rotary machine is operating, it is possible to proactively monitor the possibility of failure of the high-voltage rotary machine.

In addition, according to the present invention, it is possible not only to detect whether or not the insulation of the high-voltage rotary device at the beginning of the generation, but also to monitor in real time during the operation of the high-voltage rotary device to prevent accidental failure and stop of the high-voltage rotary device and At the same time, maintenance costs can be reduced.

Claims (4)

As a method of partial discharge of stator and interlayer short circuit of rotor, (A) the partial discharge detection sensor 122 detects the partial discharge signal of the stator 120, and the interlayer short detection sensor 121 detects the interlayer short signal of the rotor 110 (S410); (B) acquiring, by the first data collecting device 210, the partial discharge generation signal detected by the partial discharge detection sensor 122, converting the data into data necessary for monitoring (S420); (C) Simultaneously with the step (B), the second data collecting device 220 acquires the interlayer short signal detected through the interlayer short detection sensor 121 and converts the interlayer short signal into data necessary for monitoring (S430). ; And (D) the server 300 collects the partial discharge signal and the interlayer short signal inputted to the input unit 301 through the steps (B) and (C), and analyzes and controls the control unit 305 through the output unit. And displaying the result related to the partial discharge and the interlayer short circuit through the step 307 (S440). Step (C) is (C1) converting the shape and characteristics of the output signal so that the signal controller 221 can accurately analyze the weak output signal from the interlayer short detection sensor 121 without distortion (S431); (C2) a preamplifier 222 amplifying the magnitude of the interlayer short signal converted from the signal controller 221 to correct a magnitude reduction of the signal (S432); (C3) converting, by the A / D converter 223, the interlayer short signal corrected from the preamplifier 212 into digital data (S433); And (C4) a partial discharge of the high-voltage rotating device, comprising the step (S434) of transmitting the interlayer short signal analyzed by the second CPU 224 through the steps (C1) to (C3). Interlayer short circuit monitoring method. The method of claim 1, (E) the high-pressure rotation, the server 300 further comprises the step (S450) of transmitting a result related to the partial discharge and the interlayer short circuit to the external user computer 310 through the transmission unit 309. How to monitor partial discharge and short circuit of equipment. As a method of partial discharge of stator and interlayer short circuit of rotor, (A) the partial discharge detection sensor 122 detects the partial discharge signal of the stator 120, and the interlayer short detection sensor 121 detects the interlayer short signal of the rotor 110 (S410); (B) acquiring, by the first data collecting device 210, the partial discharge generation signal detected by the partial discharge detection sensor 122, converting the data into data necessary for monitoring (S420); (C) Simultaneously with the step (B), the second data collecting device 220 acquires the interlayer short signal detected through the interlayer short detection sensor 121 and converts the interlayer short signal into data necessary for monitoring (S430). ; And (D) the server 300 collects the partial discharge signal and the interlayer short signal inputted to the input unit 301 through the steps (B) and (C), and analyzes and controls the control unit 305 through the output unit. And displaying the result related to the partial discharge and the interlayer short circuit through the step 307 (S440). Step (B) is, (B1) allowing the multiplexer & signal controller 211 to select and analyze the output signals of the partial discharge detection sensors 122 installed in each phase one by one, and at the same time convert the shape and characteristics of the output signal ( S421); (B2) a step in which the preamplifier 212 amplifies the magnitude of the partial discharge signal converted from the multiplexer & signal conditioner 211 to correct a magnitude reduction of the signal (S422); (B3) a step in which the filter 213 extracts only a signal having a frequency characteristic necessary for monitoring and analysis from the signal amplified by the preamplifier 212 (S423); (B4) pulse type analyzer 214 separating the partial discharge signal and the noise signal extracted through the filter 213 and extracting only the partial discharge signal (S424); (B5) comparing unit 215 comparing the reference information in the first data collecting device 210 with the partial discharge signal from the pulse shape analyzer 214 and outputting only the partial discharge signal (S425); (B6) a step of synchronizing the partial discharge signal from the partial discharge detection sensor 122 to the 60 Hz signal by the 60 Hz synchronization unit 216 (S426); (B7) After the first CPU 217 controls the signals from the comparator 215 and the 60 Hz synchronization unit 216, the partial discharge signal from the pulse shape analyzer 214 is transmitted to the first data collection device ( Extracting only the partial discharge signal by comparing with reference information in 210 (S427); And (B8) partial discharge of the high-voltage rotating device, characterized in that the output device 219 includes the step (S428) of transmitting the partial discharge generation signal analyzed through the steps (B1) to (B7) to the outside; Interlayer short circuit monitoring method. delete

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