CN209690443U - A kind of high-voltage cable insulating state on-line detecting system - Google Patents

A kind of high-voltage cable insulating state on-line detecting system Download PDF

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Publication number
CN209690443U
CN209690443U CN201821891019.XU CN201821891019U CN209690443U CN 209690443 U CN209690443 U CN 209690443U CN 201821891019 U CN201821891019 U CN 201821891019U CN 209690443 U CN209690443 U CN 209690443U
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China
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unit
signal
voltage
cable
line detecting
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CN201821891019.XU
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周红军
陈文�
胥峥
王鑫
吴楠
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State Grid Corp of China SGCC
Yancheng Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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State Grid Corp of China SGCC
Yancheng Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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Abstract

The utility model has supplied a kind of high-voltage cable insulating state on-line detecting system, and the state of insulation on-line detecting system includes signal acquisition unit, signal conditioning unit, A/D converting unit, takes energy power supply unit, central control processing unit, communication unit, push-button unit, storage unit, display unit, alarm unit and monitoring center;The state of insulation on-line detecting system takes energy power supply unit to obtain electric energy from the tested cable by described, by carrying out analytical calculation to the signal of acquisition, judges the tested cable work state.The utility model provides a kind of high-voltage cable insulating state on-line detecting system that takes and can power based on self-induction, and electric energy needed for detection system scene is obtained in such a way that live self-induction takes energy improves detection system security reliability.

Description

A kind of high-voltage cable insulating state on-line detecting system
Technical field
The utility model belongs to technical field of electric power detection, in particular to a kind of high-voltage cable insulating state on-line checking system System.
Background technique
With the continuous development of China's economy, demand of the people to electric energy is increasing, and society's entirety electricity consumption is continuous Rising.The rising of social entirety electricity consumption will lead to the increase of the pressure of national transmission line of electricity.In city, since soil provides Source is more and more in short supply, overhead transmission line can constitute potential threat and mixed and disorderly overhead transmission line to the appearance of the city to the Electrical Safety of citizen City's looks will cause influence, so more and more overhead transmission lines are substituted by buried cable.Cable installation is in underground, difference In overhead transmission line, it is easy to by the corrosion of destruction and environment from external force, and then lead to cable failure, insulation performance drop It is low.The quality of cable insulation is to influence the key factor of cable safe and reliable operation, needs to pay much attention to.
Power cable insulation state changes the variation that will lead to grounding circulation, is obtained by the situation of change of monitoring grounding circulation It, being capable of real-time detection failure to the state of insulation of cable, it is ensured that the safe and stable operation of power cable reduces inspection workload, And it can take timely measure and reduce grounding circulation harm caused by cable.Since cable laying route is longer, scene letter The equipment power supplies such as number acquisition, processing are unstable, thus it is existing using live self-induction take can by the way of obtain detection system and show Place needs electric energy, can be improved detection system security reliability.
Utility model content
The utility model provides a kind of high-voltage cable insulating state on-line detecting system that takes and can power based on self-induction, adopts With live self-induction take can mode obtain detection system scene needed for electric energy, improve detection system security reliability.
The utility model is specially a kind of high-voltage cable insulating state on-line detecting system, the state of insulation on-line checking System include signal acquisition unit, signal conditioning unit, A/D converting unit, take can power supply unit, central control processing unit, Communication unit, push-button unit, storage unit, display unit, alarm unit and monitoring center, the signal acquisition unit with it is described Signal conditioning unit, the A/D converting unit, the central control processing unit, the communication unit, the monitoring center are suitable Sequence connection, it is described that energy power supply unit is taken to convert list with the signal acquisition unit and the signal conditioning unit, the A/D respectively First, the described central control processing unit, the communication unit, the push-button unit, the storage unit, the display unit, The alarm unit is connected, the central control processing unit also respectively with the push-button unit, storage unit, described Display unit, the alarm unit are connected;The state of insulation on-line detecting system takes energy power supply unit from institute by described It states tested cable and obtains electric energy, by carrying out analytical calculation to the signal of acquisition, judge the tested cable work state.
The signal acquisition unit is socketed on tested cable using Rogowski coil current sensor to cable loop current Signal is acquired, the low voltage signal of output and the directly proportional relationship of the loop current;Using the first temperature sensing Device acquires the temperature of the tested cable, using second temperature sensor collection site environment temperature.
The signal conditioning unit includes integrating circuit, amplifying circuit and the first filter circuit, and the integrating circuit uses Active analog integration method, including operational amplifier, first resistor device, second resistor and capacitor, when the signal of input passes through When the first resistor device is transmitted to again on the capacitor, it is equal to the capacitor and charges, the voltage on the capacitor The output voltage of the as described integrating circuit, the output voltage and the directly proportional relationship of the loop current;Described first Filter circuit can control the frequency of voltage signal within 50Hz working frequency, and filtration frequencies are greater than the signal of 50Hz, subtract Noise jamming caused by small high-frequency signal.
It is described take can power supply unit include taking energy coil, protection location, rectification circuit, the second filter circuit, battery, lead to It crosses the taking energy coil and obtains alternating voltage from the tested cable, by the protection location, the rectification circuit, described the The DC voltage of two filter circuit pressure stabilizing output smoothings carries out power storage or output using the battery;
The taking energy coil uses Open Type Electric Current Mutual Inductor;The protection location uses transient supression diode, prevents It is described that energy power supply unit is taken to induce very high surge voltage when the circuit-under-test breaks down, cause danger;The storage Battery used lithium battery.
The key-press input unit carries out parameter setting, the parameter packet in conjunction with the storage unit, the display unit Include electric current early warning value, electric current overload alarm value, current changing rate alarming value, cable temperature alarming value, environment temperature alarming value and Temperature rise alarming value, the electric current early warning value are less than the electric current overload alarm value;The key-press input unit is in conjunction with the storage Unit, the display unit can also help patrolman's progress field data to check.
The central control processing unit analyzes and determines the signal of input, by the electric current of real-time measurement and the electricity Stream early warning value and the electric current overload alarm value compare: if the result of the real-time measurement is less than the electric current early warning value, institute It is good to state tested cable insulation status;If the result of the real-time measurement is greater than the electric current early warning value, it is super to be less than the electric current Limiting alarming value, then the tested cable insulation status is deteriorated, state of insulation variation alarm signal is issued by the alarm unit, And failure report is issued to the monitoring center by the communication unit;If the result of the real-time measurement is greater than the electric current Overload alarm value, then insulation fault occurs for the tested cable, issues insulation fault alarm signal by the alarm unit, and Failure report is issued to the monitoring center by the communication unit;
The central control processing unit calculates the curent change trend, and compared with the current changing rate alarming value Compared with passing through the alarm unit and issue cable insulation status anomalous variation alarm signal if more than the current changing rate alarming value Number;
The cable temperature of measurement is compared judgement with the cable temperature alarming value by the central control processing unit, If the cable temperature of measurement is greater than the cable temperature alarming value, cable temperature abnormal alarm is issued by the alarm unit; The environment temperature of measurement is compared judgement with the environment temperature alarming value, if the environment temperature of measurement is greater than the environment Temperature alarming value issues environment temperature abnormal alarm by the alarm unit;According to the cable temperature and environment temperature of measurement Temperature rise is calculated, and is compared judgement with the temperature rise alarming value, it is single by the alarm if more than the temperature rise alarming value Member issues temperaturing lifting abnormality alarm;
The central control processing unit in conjunction with the storage unit carry out integral point data record, and formed data sheet, History curve, failure report carry out live access by the key-press input unit and the display unit, pass through the communication Unit is uploaded to the monitoring center.
Relevant information is transmitted to the monitoring center using the GPRS communication technology by the communication unit, helps monitoring personnel Long-range monitoring effective in real time is carried out to the tested cable, it can be timely when the tested cable insulation status is abnormal It takes appropriate measures;The monitoring center uses the gsm wireless communication technology by the data sheet, the history curve, institute It states failure report and is sent to associated mobile device, the associated mobile device is held by relevant staff.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of high-voltage cable insulating state on-line detecting system of the utility model.
Fig. 2 is a kind of integrating circuit structural schematic diagram of high-voltage cable insulating state on-line detecting system.
Fig. 3 is that a kind of taking for high-voltage cable insulating state on-line detecting system can power supply unit structural schematic diagram.
Specific embodiment
With reference to the accompanying drawing to a kind of specific embodiment party of high-voltage cable insulating state on-line detecting system of the utility model Formula elaborates.
As shown in Figure 1, state of insulation on-line detecting system includes signal acquisition unit, signal conditioning unit, A/D conversion list Member takes energy power supply unit, central control processing unit, communication unit, push-button unit, storage unit, display unit, alarm unit And monitoring center, the signal acquisition unit and the signal conditioning unit, the A/D converting unit, at the central control Manage unit, the communication unit, the monitoring center be linked in sequence, it is described take can power supply unit respectively with the signal acquisition list It is first with the signal conditioning unit, the A/D converting unit, the central control processing unit, the communication unit, described press Key unit, the storage unit, the display unit, the alarm unit are connected, and the central control processing unit also divides It is not connected with the push-button unit, the storage unit, the display unit, the alarm unit;The state of insulation exists Line detection system takes energy power supply unit to obtain electric energy from the tested cable by described, by analyzing the signal of acquisition It calculates, judges the tested cable work state.
The signal acquisition unit is socketed on tested cable using Rogowski coil current sensor to cable loop current Signal is acquired, the low voltage signal of output and the directly proportional relationship of the loop current;Using the first temperature sensing Device acquires the temperature of the tested cable, using second temperature sensor collection site environment temperature.
The signal conditioning unit includes integrating circuit, amplifying circuit and the first filter circuit;As shown in Fig. 2, the product Parallel circuit uses active analog integration method, including operational amplifier 1, first resistor device 2, second resistor 3 and capacitor 4, when When the signal of input is transmitted on the capacitor 4 again by the first resistor device 2, it is equal to the capacitor 4 and charges, institute State the output voltage that the voltage on capacitor 4 is the integrating circuit, the output voltage and the loop current directly at Proportionate relationship;The frequency of voltage signal can be controlled the filtration frequencies within 50Hz working frequency by first filter circuit Signal greater than 50Hz reduces noise jamming caused by high-frequency signal.
As shown in figure 3, it is described take can power supply unit include taking energy coil, protection location, rectification circuit, the second filtered electrical Road, battery obtain alternating voltage from the tested cable by the taking energy coil, by the protection location, described whole The DC voltage of current circuit, the second filter circuit pressure stabilizing output smoothing, using the battery carry out power storage or Output;
The taking energy coil uses Open Type Electric Current Mutual Inductor;The protection location uses transient supression diode, prevents It is described that energy power supply unit is taken to induce very high surge voltage when the circuit-under-test breaks down, cause danger;The storage Battery used lithium battery.
The key-press input unit carries out parameter setting, the parameter packet in conjunction with the storage unit, the display unit Include electric current early warning value, electric current overload alarm value, current changing rate alarming value, cable temperature alarming value, environment temperature alarming value and Temperature rise alarming value, the electric current early warning value are less than the electric current overload alarm value;The key-press input unit is in conjunction with the storage Unit, the display unit can also help patrolman's progress field data to check.
The central control processing unit analyzes and determines the signal of input, by the electric current of real-time measurement and the electricity Stream early warning value and the electric current overload alarm value compare: if the result of the real-time measurement is less than the electric current early warning value, institute It is good to state tested cable insulation status;If the result of the real-time measurement is greater than the electric current early warning value, it is super to be less than the electric current Limiting alarming value, then the tested cable insulation status is deteriorated, state of insulation variation alarm signal is issued by the alarm unit, And failure report is issued to the monitoring center by the communication unit;If the result of the real-time measurement is greater than the electric current Overload alarm value, then insulation fault occurs for the tested cable, issues insulation fault alarm signal by the alarm unit, and Failure report is issued to the monitoring center by the communication unit;
The central control processing unit calculates the curent change trend, and compared with the current changing rate alarming value Compared with passing through the alarm unit and issue cable insulation status anomalous variation alarm signal if more than the current changing rate alarming value Number;
The cable temperature of measurement is compared judgement with the cable temperature alarming value by the central control processing unit, If the cable temperature of measurement is greater than the cable temperature alarming value, cable temperature abnormal alarm is issued by the alarm unit; The environment temperature of measurement is compared judgement with the environment temperature alarming value, if the environment temperature of measurement is greater than the environment Temperature alarming value issues environment temperature abnormal alarm by the alarm unit;According to the cable temperature and environment temperature of measurement Temperature rise is calculated, and is compared judgement with the temperature rise alarming value, it is single by the alarm if more than the temperature rise alarming value Member issues temperaturing lifting abnormality alarm;
The central control processing unit in conjunction with the storage unit carry out integral point data record, and formed data sheet, History curve, failure report carry out live access by the key-press input unit and the display unit, pass through the communication Unit is uploaded to the monitoring center.
Relevant information is transmitted to the monitoring center using the GPRS communication technology by the communication unit, helps monitoring personnel Long-range monitoring effective in real time is carried out to the tested cable, it can be timely when the tested cable insulation status is abnormal It takes appropriate measures;The monitoring center uses the gsm wireless communication technology by the data sheet, the history curve, institute It states failure report and is sent to associated mobile device, the associated mobile device is held by relevant staff.
Finally it should be noted that only illustrating the technical solution of the utility model in conjunction with above-described embodiment rather than limiting it System.Those of ordinary skills in the art should understand that arriving, those skilled in the art can be to the specific implementation of the utility model Mode is modified or replaced equivalently, but these modifications or change are being applied among pending claims.

Claims (6)

1. a kind of high-voltage cable insulating state on-line detecting system, which is characterized in that the state of insulation on-line detecting system packet It includes signal acquisition unit, signal conditioning unit, A/D converting unit, take energy power supply unit, central control processing unit, communication unit Member, push-button unit, storage unit, display unit, alarm unit and monitoring center, the signal acquisition unit and the signal tune Reason unit, the A/D converting unit, the central control processing unit, the communication unit, monitoring center sequence connect Connect, it is described take can power supply unit respectively with the signal acquisition unit and the signal conditioning unit, the A/D converting unit, It is the central control processing unit, the communication unit, the push-button unit, the storage unit, the display unit, described Alarm unit is connected, the central control processing unit also respectively with the push-button unit, the storage unit, the display Unit, the alarm unit are connected;The state of insulation on-line detecting system takes energy power supply unit from tested electricity by described Cable obtains electric energy, by carrying out analytical calculation to the signal of acquisition, judges the tested cable work state.
2. a kind of high-voltage cable insulating state on-line detecting system according to claim 1, which is characterized in that the signal Acquisition unit is socketed on tested cable using Rogowski coil current sensor and is acquired to cable loop current signal, is exported With the low voltage signal of the directly proportional relationship of the loop current;The tested cable is acquired using the first temperature sensor Temperature, using second temperature sensor collection site environment temperature.
3. a kind of high-voltage cable insulating state on-line detecting system according to claim 2, which is characterized in that the signal Conditioning unit includes integrating circuit, amplifying circuit and the first filter circuit, and the integrating circuit uses active analog integration method, packet Operational amplifier, first resistor device, second resistor and capacitor are included, when the signal of input is passed again by the first resistor device When being delivered on the capacitor, it is equal to the capacitor and charges, the voltage on the capacitor is the integrating circuit Output voltage, the output voltage and the directly proportional relationship of the loop current;First filter circuit can be by voltage The frequency of signal controls within 50Hz working frequency, and filtration frequencies are greater than the signal of 50Hz, reduces and makes an uproar caused by high-frequency signal Acoustic jamming.
4. a kind of high-voltage cable insulating state on-line detecting system according to claim 3, which is characterized in that described to take energy Power supply unit includes taking energy coil, protection location, rectification circuit, the second filter circuit, battery, by the taking energy coil from The tested cable obtains alternating voltage, defeated by the protection location, the rectification circuit, the second filter circuit pressure stabilizing Smooth DC voltage out carries out power storage or output using the battery;
The taking energy coil uses Open Type Electric Current Mutual Inductor;The protection location uses transient supression diode, prevents from working as institute When stating circuit-under-test and breaking down, it is described take can power supply unit induce very high surge voltage, cause danger;The battery Using lithium battery.
5. a kind of high-voltage cable insulating state on-line detecting system according to claim 4, which is characterized in that the key Unit carries out parameter setting in conjunction with the storage unit, the display unit, and the parameter includes that electric current early warning value, electric current transfinite Alarming value, current changing rate alarming value, cable temperature alarming value, environment temperature alarming value and temperature rise alarming value, the electric current are pre- Alert value is less than the electric current overload alarm value;The push-button unit can also be helped in conjunction with the storage unit, the display unit It helps patrolman to carry out field data to check.
6. a kind of high-voltage cable insulating state on-line detecting system according to claim 5, which is characterized in that the communication Relevant information is transmitted to the monitoring center using the GPRS communication technology by unit, helps monitoring personnel real to the tested cable Row long-range monitoring effective in real time, can take appropriate measures in time when the tested cable insulation status is abnormal; The central control processing unit in conjunction with the storage unit carry out integral point data record, and formed data sheet, history curve, Failure report carries out live access by the push-button unit and the display unit, is uploaded to institute by the communication unit State monitoring center;The monitoring center uses the gsm wireless communication technology by the data sheet, the history curve, the event Barrier report is sent to associated mobile device, and the associated mobile device is held by relevant staff.
CN201821891019.XU 2018-11-16 2018-11-16 A kind of high-voltage cable insulating state on-line detecting system Active CN209690443U (en)

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Application Number Priority Date Filing Date Title
CN201821891019.XU CN209690443U (en) 2018-11-16 2018-11-16 A kind of high-voltage cable insulating state on-line detecting system

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112083254A (en) * 2020-09-18 2020-12-15 西南交通大学 Electrical injury damage evaluation method considering differentiation of human body pressure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112083254A (en) * 2020-09-18 2020-12-15 西南交通大学 Electrical injury damage evaluation method considering differentiation of human body pressure
CN112083254B (en) * 2020-09-18 2021-06-29 西南交通大学 Electrical injury damage evaluation method considering differentiation of human body pressure

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