A partial discharge online detection system

Abstract

The invention discloses a partial discharge online detection system, which relates to the field of discharge detection technology. The partial discharge online detection comprises a discharge detection unit, a voltage mutual inductance unit, a transmission unit, a signal pickup unit, a peak value display unit, an oscilloscope display unit, a current conversion unit, a current broken line unit, an abnormal current early warning unit and a review display unit. The advantages of the invention are as follows: the detected pulse equivalent can be converted into a current size by the current conversion unit, and the converted current sizes at different times can be graphed, and the converted current sizes can be graphed into a broken line graph by the current broken line unit, and the real-time change of the current size can be observed conveniently by using the broken line graph, so that the discharge status can be displayed in different forms by using the real-time change of the current, and it can be more intuitive to judge whether the current will cause damage to the detection target during discharge.

Description

Technical Field

[0001] The invention relates to the technical field of discharge detection, in particular to an online partial discharge detection system. Background Art

[0002] Discharge occurs only in local areas of the insulator, but does not penetrate between the conductors to which voltage is applied. It can occur near the conductor or in other places. This phenomenon is called partial discharge. The partial discharge phenomenon mainly refers to high-voltage electrical equipment. According to power grid statistics, partial discharge is an important reason for the final insulation breakdown of high-voltage electrical equipment and an important sign of insulation degradation. It is the discharge that occurs in a local area of ​​the insulation of power equipment under the action of a sufficiently strong electric field. This discharge is limited to only causing a local short (bridge) connection between the insulation of the conductors without forming a conductive channel. Each partial discharge will have some impact on the insulation material. Slight partial discharge has little effect on the insulation of power equipment, and the insulation strength decreases slowly. However, strong partial discharge will cause the insulation strength to decrease quickly, which is an important factor in the insulation damage of high-voltage power equipment. Therefore, when designing the insulation of high-voltage power equipment, it is necessary to consider that under the action of long-term working voltage, strong partial discharge is not allowed to occur in the insulation structure. The equipment in operation should be monitored more closely. When the local discharge exceeds a certain level, the equipment should be withdrawn from operation for inspection or replacement.

[0003] The general partial discharge detection on the market is not convenient to convert the detected pulses into current for display, and when the viewer is a non-professional, it is not convenient to judge whether the magnitude of the current will cause damage to the detection target. For this reason, we propose a partial discharge online detection system. Summary of the invention

[0004] The object of the present invention is to provide a partial discharge online detection system.

[0005] In order to solve the problems raised in the above background technology, the present invention provides the following technical solutions: a partial discharge online detection system, the partial discharge online detection comprises a discharge detection unit, a voltage mutual inductance unit, a transmission unit, a signal pickup unit, a peak display unit, an oscilloscope display unit, a current conversion unit, a current folding line unit, an abnormal current early warning unit and a review display unit, wherein

[0006] A discharge detection unit, used for partial discharge detection;

[0007] A voltage mutual induction unit is used to discharge the pulse signal through the coupling capacitor, and the discharge detection unit is communicatively connected with the voltage mutual induction unit;

[0008] A transmission unit, used for acquiring a pulse signal, the transmission unit being communicatively connected with the voltage mutual inductance unit;

[0009] A signal pickup unit, used for amplifying the pulse signal, the signal pickup unit is communicatively connected with the transmission unit;

[0010] A peak value display unit is used to display the pulse peak value of each week and record the time of the peak value. The peak value display unit is communicatively connected with the signal pickup unit.

[0011] An oscilloscope display unit is used to generate a test voltage zero-crossing signal and display a zero standard pulse on an oscilloscope screen, and a peak value display unit is communicatively connected with the oscilloscope display unit;

[0012] A current conversion unit, used for converting pulses into current data, the current conversion unit being communicatively connected with the signal pickup unit;

[0013] A current broken line unit, used for forming a broken line graph from the current data converted from the current, the current broken line unit being communicatively connected with the current conversion unit;

[0014] The abnormal current warning unit is used to divide the current interval, and when the current is greater than the normal current, the outer side is warned. The abnormal current warning unit is connected to the current line graph in communication;

[0015] The review display unit is used to display to the outside world. When the review of the detection target is completed, the "Reviewed" option can be clicked in the review display unit. At the same time, the warning line chart for distinguishing the abnormal current warning unit will be displayed. The review display unit is connected in communication with the abnormal current warning unit.

[0016] As a further solution of the present invention: the discharge detection unit can detect the local discharge condition of the detection target in real time. When discharge is detected, the voltage mutual inductance unit is started to discharge the pulse signal detected by the discharge detection unit through the coupling capacitor of the voltage mutual inductance unit.

[0017] As a further solution of the present invention: the transmission unit can acquire local pulses of the detection target and then transmit the acquired pulses to the signal pickup unit.

[0018] As a further solution of the present invention: the signal pickup unit can be amplified by a low noise amplifier to amplify the pulse signal, and then the amplified pulse signal is transmitted to the peak display unit.

[0019] As a further solution of the present invention: the peak value display unit can display the pulse peak value of each week and synchronously display the time of the pulse peak value.

[0020] As a further solution of the present invention: when the signal pickup unit receives a pulse, the current conversion unit will synchronously transmit the pulse value to the current conversion unit. At this time, the current conversion unit converts the received pulse value into a current value, and then transmits the converted current value to the current curve unit.

[0021] As a further solution of the present invention: the current broken line unit can construct a graph of the current data transmitted by the current conversion unit so that the current values ​​at different times synchronously form a broken line graph, and then transmit the constructed broken line graph to the abnormal current warning unit.

[0022] As a further solution of the present invention: the abnormal current warning unit is capable of partitioning the current size, that is, dividing the partitions into low current warning, normal operation and high current warning, and inserting the partition boundaries into the line graph transmitted by the current line graph unit, and at the same time, issuing a warning for the current data that is not in the normal working partition, and then transmitting the current data that is not in the normal working partition screened out by the abnormal current warning unit to the review display unit.

[0023] As a further solution of the present invention: the review display unit can display to the outside world the current data that is not in the normal working partition and is screened out by the abnormal current warning unit. At this time, the staff can review the load condition, short circuit condition and fault condition of the detection tool and the detection target, and at the same time, when clicking the reviewed option, the review display unit will store the review time and the review reason.

[0024] By adopting the above technical solution, compared with the prior art, the beneficial effects of the present invention are:

[0025] The present invention can convert the detected pulse equivalent into current magnitude through the current conversion unit, and graph the converted current magnitudes at different times, and can graph the converted current magnitudes into a line graph through the current broken line unit, and the line graph is used to conveniently observe the real-time change of the current magnitude, so that the real-time change of the current can be used to display the discharge status in different forms, and it can be more intuitive to judge whether the current will cause damage to the detection target during discharge;

[0026] The present invention can receive the broken line graph transmitted by the current broken line unit through the abnormal current warning unit, and give an alert according to the interval set in the abnormal current warning unit, such as distinguishing between low current warning, normal working and high current warning, and setting the value of the low current warning interval to E, that is, E is a current lower than 0.5V, the value of the normal working interval is set to T, that is, T is 0.5V-15V, the value of the high current warning interval is set to L, that is, L is 15V-20V, and the value of the abnormal alarm interval is set to M, that is, M is greater than 20V, so that when the current of the detection target is about to exceed the normal range during discharge, an early warning will be given, and a prompt can be given in time;

[0027] The present invention can display the items that need to be detected to the outside through the review display unit, and warn the internal staff that the discharge detection target needs to be reviewed to prevent abnormal current warning caused by equipment reasons of the detection target. After completing a certain inspection, the staff can click on "Reviewed" to complete the inspection. After the inspection is completed, the review display unit will re-test the discharge detection unit to review the detection target. This can remind the staff to check the discharge reasons of the detection target one by one, and can re-test to reduce the probability of detection errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Example 1, please refer to the attached Figure 1 The present invention provides a technical solution: a partial discharge online detection system, the partial discharge online detection comprises a discharge detection unit, a voltage mutual inductance unit, a transmission unit, a signal pickup unit, a peak display unit, an oscilloscope display unit, a current conversion unit, a current broken line unit, an abnormal current early warning unit and a review display unit, wherein

[0031] A discharge detection unit, used for partial discharge detection;

[0032] A voltage mutual induction unit is used to discharge the pulse signal through the coupling capacitor, and the discharge detection unit is communicatively connected with the voltage mutual induction unit;

[0033] A transmission unit, used for acquiring a pulse signal, the transmission unit being communicatively connected with the voltage mutual inductance unit;

[0034] A signal pickup unit, used for amplifying the pulse signal, the signal pickup unit is communicatively connected with the transmission unit;

[0035] A peak value display unit is used to display the pulse peak value of each week and record the time of the peak value. The peak value display unit is communicatively connected with the signal pickup unit.

[0036] An oscilloscope display unit is used to generate a test voltage zero-crossing signal and display a zero standard pulse on an oscilloscope screen, and a peak value display unit is communicatively connected with the oscilloscope display unit;

[0037] A current conversion unit, used for converting pulses into current data, the current conversion unit being communicatively connected with the signal pickup unit;

[0038] A current broken line unit, used for forming a broken line graph from the current data converted from the current, the current broken line unit being communicatively connected with the current conversion unit;

[0039] The abnormal current warning unit is used to divide the current interval, and when the current is greater than the normal current, the outer side is warned. The abnormal current warning unit is connected to the current line graph in communication;

[0040] The review display unit is used to display to the outside world. When the review of the detection target is completed, the "Reviewed" option can be clicked in the review display unit. At the same time, the warning line chart for distinguishing the abnormal current warning unit will be displayed. The review display unit is connected in communication with the abnormal current warning unit.

[0041] Please see attached Figure 1 , the discharge detection unit can detect the local discharge condition of the detection target in real time. When the discharge is detected, the voltage mutual inductance unit is started to discharge the pulse signal detected by the discharge detection unit through the coupling capacitor of the voltage mutual inductance unit. The transmission unit can obtain the local pulse of the detection target, and then transmit the obtained pulse to the signal pickup unit. When the signal pickup unit receives the pulse, the current conversion unit will synchronously transmit the pulse value to the current conversion unit. At this time, the current conversion unit converts the received pulse value into a current value, and then transmits the converted current value to the current broken line unit. The current broken line unit can compose the current data transmitted by the current conversion unit, so that the current values ​​at different times synchronously constitute a broken line graph, and then transmit the constituted broken line graph to the abnormal current warning unit;

[0042] In this embodiment, when the discharge detection unit detects that a discharge condition currently occurs, the discharge detection unit can detect it in time, and start the voltage mutual inductance unit in time to discharge the detected pulse through the coupling capacitor of the voltage mutual inductance unit, and then use the transmission unit to obtain the specific value of the pulse, that is, the pulse equivalent is , the voltage is , the current is , time is ,time Can ,Right now The units can be divided into minutes, hours, and days. When the unit is minutes, The day is converted into 24 hours, and then synchronized into 60 minutes.

[0043] .

[0044] When in use, the detected pulse equivalent can be converted into current size through the current conversion unit, and the converted current sizes at different times can be graphed. The converted current sizes can be graphed into a line graph through the current broken line unit. The line graph can be used to facilitate observation of real-time changes in current size, and the real-time changes in current can be used to display the discharge status in different forms.

[0045] Example 2, please refer to the attached Figure 1 The present invention provides a technical solution: a partial discharge online detection system, the partial discharge online detection comprises a discharge detection unit, a voltage mutual inductance unit, a transmission unit, a signal pickup unit, a peak display unit, an oscilloscope display unit, a current conversion unit, a current broken line unit, an abnormal current early warning unit and a review display unit, wherein

[0046] A discharge detection unit, used for partial discharge detection;

[0047] A voltage mutual induction unit is used to discharge the pulse signal through the coupling capacitor, and the discharge detection unit is communicatively connected with the voltage mutual induction unit;

[0048] A transmission unit, used for acquiring a pulse signal, the transmission unit being communicatively connected with the voltage mutual inductance unit;

[0049] A signal pickup unit, used for amplifying the pulse signal, the signal pickup unit is communicatively connected with the transmission unit;

[0050] A peak value display unit is used to display the pulse peak value of each week and record the time of the peak value. The peak value display unit is communicatively connected with the signal pickup unit.

[0051] An oscilloscope display unit is used to generate a test voltage zero-crossing signal and display a zero standard pulse on an oscilloscope screen, and a peak value display unit is communicatively connected with the oscilloscope display unit;

[0052] A current conversion unit, used for converting pulses into current data, the current conversion unit being communicatively connected with the signal pickup unit;

[0053] A current broken line unit, used for forming a broken line graph from the current data converted from the current, the current broken line unit being communicatively connected with the current conversion unit;

[0054] The abnormal current warning unit is used to divide the current interval, and when the current is greater than the normal current, the outer side is warned. The abnormal current warning unit is connected to the current line graph in communication;

[0055] The review display unit is used to display to the outside world. When the review of the detection target is completed, the "Reviewed" option can be clicked in the review display unit. At the same time, the warning line chart for distinguishing the abnormal current warning unit will be displayed. The review display unit is connected in communication with the abnormal current warning unit.

[0056] Please see attached Figure 1 , the signal pickup unit can be amplified by a low noise amplifier to amplify the pulse signal, and then transmit the amplified pulse signal to the peak display unit, the abnormal current warning unit can partition the current size, that is, divide the partition into low current warning, normal operation and high current warning, and insert the partition boundary into the broken line graph transmitted by the current broken line unit, and at the same time, warn the current data that is not in the normal working partition, and then transmit the current data that is not in the normal working partition screened by the abnormal current warning unit to the review display unit;

[0057] In this embodiment, the detected pulse can be amplified by a low noise amplifier through the signal pickup unit, so that the pulse signal is amplified. The pulse amplifier can amplify the input signal source to the required output power level.

[0058] When in use, the abnormal current warning unit can receive the line graph transmitted by the current line graph unit, and warn according to the interval set in the abnormal current warning unit, such as distinguishing between low current warning, normal operation, high current warning and abnormal alarm, and setting the value of the low current warning interval ,Right now For currents below 0.5V, the value of the normal operating range is set to ,Right now The high current warning interval is set to 0.5V-15V. ,Right now 15V-20V, and set the value of the abnormal alarm interval to ,Right now is greater than 20V;

[0059] Right now: When level, and level for early warning;

[0060] When level, and level for early warning;

[0061] When level, and level for early warning;

[0062] when When level, and Level alarm.

[0063] Example 3, please refer to the attached Figure 1 The present invention provides a technical solution: a partial discharge online detection system, comprising a partial discharge online detection including a discharge detection unit, a voltage mutual inductance unit, a transmission unit, a signal pickup unit, a peak display unit, an oscilloscope display unit, a current conversion unit, a current fold line unit, an abnormal current warning unit and a review display unit, wherein

[0064] A discharge detection unit, used for partial discharge detection;

[0065] A voltage mutual induction unit is used to discharge the pulse signal through the coupling capacitor, and the discharge detection unit is communicatively connected with the voltage mutual induction unit;

[0066] A transmission unit, used for acquiring a pulse signal, the transmission unit being communicatively connected with the voltage mutual inductance unit;

[0067] A signal pickup unit, used for amplifying the pulse signal, the signal pickup unit is communicatively connected with the transmission unit;

[0068] A peak value display unit is used to display the pulse peak value of each week and record the time of the peak value. The peak value display unit is communicatively connected with the signal pickup unit.

[0069] An oscilloscope display unit is used to generate a test voltage zero-crossing signal and display a zero standard pulse on an oscilloscope screen, and a peak value display unit is communicatively connected with the oscilloscope display unit;

[0070] A current conversion unit, used for converting pulses into current data, the current conversion unit being communicatively connected with the signal pickup unit;

[0071] A current broken line unit, used for forming a broken line graph from the current data converted from the current, the current broken line unit being communicatively connected with the current conversion unit;

[0072] The abnormal current warning unit is used to divide the current interval, and when the current is greater than the normal current, the outer side is warned. The abnormal current warning unit is connected to the current line graph in communication;

[0073] The review display unit is used to display to the outside world. When the review of the detection target is completed, the "Reviewed" option can be clicked in the review display unit. At the same time, the warning line chart for distinguishing the abnormal current warning unit will be displayed. The review display unit is connected in communication with the abnormal current warning unit.

[0074] Please see attached Figure 1 , the peak value display unit can display the weekly pulse peak value and the time of the pulse peak value synchronously, and the review display unit can display the current data that is not in the normal working partition screened by the abnormal current warning unit to the outside world, at this time, the staff can review the load condition, short circuit condition and fault condition of the detection tool and the detection target, and at the same time, when clicking the "reviewed" option, the review display unit will store the review time and the review reason;

[0075] In this embodiment, the peak value of each week can be displayed and recorded through the peak value display unit. At the same time, the time of the pulse peak value will be recorded and stored to facilitate subsequent search and record.

[0076] When in use, the items that need to be tested can be displayed to the outside through the review display unit, alerting internal staff that the discharge detection target needs to be reviewed to prevent abnormal current warnings caused by equipment problems of the detection target. After completing a certain inspection, click "Reviewed" to complete the inspection. When the inspection is completed, the review display unit will re-test the discharge detection unit to review the detection target.

[0077] Working principle:

[0078] The first step is to first use the discharge detection unit to detect the discharge condition of the target to be detected. When the target is detected to be discharged, the information will be transmitted to the voltage mutual inductance unit. The voltage mutual inductance unit is used to discharge the detected pulse signal through the coupling capacitor, and then transmitted to the inside of the transmission unit. The transmission unit is used to obtain the pulse, and then the obtained pulse is transmitted to the inside of the signal pickup unit. The signal pickup unit is used to amplify the pulse, and then the amplified pulse is transmitted to the peak display unit. The peak display unit is used to display the daily peak value and record the time when the peak value occurs. At the same time, the oscilloscope display unit is used to compare the voltage zero-crossing signal and the zero standard pulse, and the comparison information is displayed;

[0079] The second step is that after the signal pickup unit receives the pulse from the transmission unit, it will amplify the pulse. When the amplified pulse is transmitted to the peak display unit, the amplified signal will be transmitted to the current conversion unit at the same time. , which can be converted into The received pulse is converted so that the pulse is converted into current. At this time, the size of the real-time current is transmitted to the current broken line unit, and the current is displayed in a broken line graph using the current broken line unit. The completed broken line graph is then transmitted to the abnormal current warning unit. The abnormal current warning unit will issue a low current warning for currents below 0.5V. When the current is between 0.5V and 15V, the abnormal current warning unit will stop running. When the current is between 15V and 20V, a high current warning will appear. When the current is above 20V, the abnormal current warning unit will issue an abnormal alarm. When a low current warning, a high current warning or an abnormal alarm appears, the information will be transmitted to the review display unit. At this time, the review display unit will display review items to remind the staff to review the review items of the detection target. After completing a review item, you can click "Reviewed" to facilitate memory. After the overall review is completed, the review display unit will control the discharge detection unit to re-detect the detection target.

[0080] Those skilled in the art should understand that the modules or steps of the present invention described above can be implemented by a general-purpose computer device, or alternatively, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. The present invention is not limited to any specific combination of hardware and software.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0082] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A partial discharge online detection system, characterized in that: The partial discharge online detection includes a discharge detection unit, a voltage mutual inductance unit, a transmission unit, a signal pickup unit, a peak display unit, an oscilloscope display unit, a current conversion unit, a current broken line unit, an abnormal current early warning unit and a review display unit, wherein: A discharge detection unit, used for partial discharge detection; A voltage mutual induction unit is used to discharge the pulse signal through the coupling capacitor, and the discharge detection unit is communicatively connected with the voltage mutual induction unit; A transmission unit, used for acquiring a pulse signal, the transmission unit being communicatively connected with the voltage mutual inductance unit; A signal pickup unit, used for amplifying the pulse signal, the signal pickup unit is communicatively connected with the transmission unit; A peak value display unit is used to display the pulse peak value of each week and record the time of the peak value. The peak value display unit is communicatively connected with the signal pickup unit. An oscilloscope display unit is used to generate a test voltage zero-crossing signal and display a zero standard pulse on an oscilloscope screen, and a peak value display unit is communicatively connected with the oscilloscope display unit; A current conversion unit, used for converting pulses into current data, the current conversion unit being communicatively connected with the signal pickup unit; A current broken line unit, used for forming a broken line graph from the current data converted from the current, the current broken line unit being communicatively connected with the current conversion unit; The abnormal current warning unit is used to divide the current interval, and when the current is greater than the normal current, the outer side is warned. The abnormal current warning unit is connected to the current line graph in communication; The review display unit is used to display to the outside world. When the review of the detection target is completed, the "Reviewed" option can be clicked in the review display unit, and the distinguishing warning line chart in the abnormal current warning unit will be displayed at the same time. The review display unit is connected to the abnormal current warning unit in communication; The discharge detection unit can detect the local discharge condition of the detection target in real time. When the discharge is detected, the voltage mutual inductance unit is started to discharge the pulse signal detected by the discharge detection unit through the coupling capacitor of the voltage mutual inductance unit. When the discharge detection unit detects the current discharge condition, the discharge detection unit can detect it in time and start the voltage mutual inductance unit in time to discharge the detected pulse through the coupling capacitor of the voltage mutual inductance unit, and then use the transmission unit to obtain the specific value of the pulse, that is, the pulse equivalent is P, the voltage is U, the current is I, and the time is T. The time T can be T= , that is, the unit of D can be divided into minutes, hours and days. When the unit of D is minutes, the day of T can be converted into 24 hours, and then synchronized into 60 minutes. At this time; P=UI ; The transmission unit can acquire local pulses of the detection target and then transmit the acquired pulses to the signal pickup unit; The signal pickup unit can be amplified by a low noise amplifier to amplify the pulse signal, and then transmit the amplified pulse signal to the peak display unit; The peak value display unit can display the pulse peak value of each week and synchronously display the time of the pulse peak value; When the signal pickup unit receives a pulse, the current conversion unit will synchronously transmit the pulse value to the current conversion unit. At this time, the current conversion unit converts the received pulse value into a current value, and then transmits the converted current value to the current fold line unit; The current broken line unit can construct a graph of the current data transmitted by the current conversion unit, so that the current values ​​at different times synchronously form a broken line graph, and then transmit the constructed broken line graph to the abnormal current early warning unit; The abnormal current warning unit can partition the current size, that is, divide the partitions into low current warning, normal operation and high current warning, and insert the partition boundaries into the broken line graph transmitted by the current broken line unit, and at the same time, warn the current data that is not in the normal working partition, and then transmit the current data that is not in the normal working partition screened by the abnormal current warning unit to the review display unit; The abnormal current warning unit can receive the line graph transmitted by the current line graph unit, and warn according to the interval set in the abnormal current warning unit, and distinguish between low current warning, normal operation, high current warning and abnormal alarm; The review display unit can display to the outside world the current data that is not in the normal working partition and is screened out by the abnormal current warning unit. At this time, the staff can review the load condition, short circuit condition and fault condition of the detection tool and the detection target, and click on the reviewed option. At the same time, the review display unit will store the review time and the reason for the review.

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