CN103576057B - Insulated on-line monitoring system and method - Google Patents
Insulated on-line monitoring system and method Download PDFInfo
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- CN103576057B CN103576057B CN201210250690.7A CN201210250690A CN103576057B CN 103576057 B CN103576057 B CN 103576057B CN 201210250690 A CN201210250690 A CN 201210250690A CN 103576057 B CN103576057 B CN 103576057B
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Abstract
The invention provides a kind of insulated on-line monitoring system and method, this system comprises: remote monitoring platform, host computer, CAN turn Ethernet Adaptation Unit and at least one on-the-spot insulating monitoring unit; Described on-the-spot insulating monitoring unit is for monitoring the state of insulation of the electrical equipment being arranged on traction substation; Described in each, on-the-spot insulating monitoring unit is connected with one end that described CAN turns Ethernet Adaptation Unit by CAN, the other end that described CAN turns Ethernet Adaptation Unit is connected with one end of described host computer, and the other end of described host computer is connected with described remote monitoring platform by database.There is high reliability and monitoring accuracy, thus realize the permanently effective monitoring to insulation of electrical installation state; Further, can also monitor multiple insulation parameters of multiple stage electrical equipment simultaneously simultaneously, thus reduce monitoring cost, alleviate the working strength of monitoring personnel.
Description
Technical field
The invention belongs to electrical equipment monitoring technical field, be specifically related to a kind of insulated on-line monitoring system and method.
Background technology
Along with developing rapidly of current rail cause, the traction substation used in transportation by railroad is had higher requirement, concrete: the requirement that an electrical equipment demand fulfillment line duration is long, the power failure examination and repair time is short used in traction substation; Further, the fault that the electrical equipment of also needing to give warning in advance may cause due to Insulation Problems, reduces the loss that No. a time electrical equipment may cause due to Insulation Problems.Therefore, the insulated on-line monitoring system of development electrical equipment, the state of insulation of monitoring electrical equipment, thus ensure that the electrical safety performance of electrical equipment under actual working state has important practical significance.
At present, the type insulation monitoring system of electrical equipment is the state of insulation adopting portable instrument monitoring electrical equipment, that is: when needing the state of insulation of monitoring some electrical equipments, on this electrical equipment surface, a detecting instrument being installed, thus detecting the state of insulation of electrical equipment.The major defect of this kind of method existence is: (one) poor real, cannot carry out permanently effective monitoring to the state of insulation of electrical equipment; (2) monitor efficiency low, when needing the multiple insulation parameter of monitoring a certain electrical equipment, needing to use all kinds of detecting instrument, thus both improve monitoring cost, turn increasing the working strength of monitoring personnel.
Summary of the invention
For the defect that prior art exists, the invention provides a kind of insulated on-line monitoring system and method, there is high reliability and monitoring accuracy, thus realize the permanently effective monitoring to insulation of electrical installation state; Further, can also monitor multiple insulation parameters of multiple stage electrical equipment simultaneously simultaneously, thus reduce monitoring cost, alleviate the working strength of monitoring personnel.
The technical solution used in the present invention is as follows:
The invention provides a kind of insulated on-line monitoring system, comprising: remote monitoring platform, host computer, CAN turn Ethernet Adaptation Unit and at least one on-the-spot insulating monitoring unit; Described on-the-spot insulating monitoring unit is for monitoring the state of insulation of the electrical equipment being arranged on traction substation; Described in each, on-the-spot insulating monitoring unit is connected with one end that described CAN turns Ethernet Adaptation Unit by CAN, the other end that described CAN turns Ethernet Adaptation Unit is connected with one end of described host computer, and the other end of described host computer is connected with described remote monitoring platform by database.
Preferably, described electrical equipment comprises primary side bushing shell for transformer, current transformer, voltage transformer (VT) and lightning arrester.
Preferably, described in each, on-the-spot insulating monitoring unit comprises: master controller, power module, memory module, analog-to-digital conversion module, at least one low current sensor, at least one voltage sensor, at least one temperature sensor, at least one humidity sensor and at least one well heater; Described master controller is connected with described power module, described memory module, described temperature sensor, described humidity sensor and described well heater respectively; Described master controller is also connected with described low current sensor by described analog-to-digital conversion module, and described master controller is also connected with described voltage sensor by described analog-to-digital conversion module.
Preferably, described master controller is connected with described well heater by after driving circuit and relay successively; Described master controller is LPC1768 controller; Described power module is digital power module or analog power module; Described memory module is eeprom memory; Described analog-to-digital conversion module is AD765616 position analog-to-digital conversion module; Described low current sensor is Zero flux punching low current sensor; Described master controller is also provided with CAN interface, RS485 interface, Ethernet interface RS485 network interface, RS232 debugging interface, I2C interface, SSP0 interface.
The invention provides a kind of method applying above-mentioned insulated on-line monitoring system, comprise the following steps:
S1, the collection of described on-the-spot insulating monitoring unit also stores the insulation parameter information of monitored electrical equipment, and wherein, the data layout of described insulation parameter information is the data layout meeting the CAN network transmission protocol; When receiving the data calling request that described host computer sends, described insulation parameter information is uploaded to described CAN by CAN network and turns Ethernet Adaptation Unit by described on-the-spot insulating monitoring unit;
S2, it is the data layout meeting Ethernet host-host protocol that described CAN turns Ethernet Adaptation Unit by the Data Format Transform of described insulation parameter information, obtain the insulation parameter information meeting Ethernet host-host protocol, then the described insulation parameter information meeting Ethernet host-host protocol is transferred to described host computer by Ethernet;
S3, described host computer carries out analysis to the described insulation parameter information received and judges, obtains the state of insulation appraisal report of described monitored electrical equipment, and is stored in described database by described state of insulation appraisal report;
S4, described remote monitoring platform reads and shows the described state of insulation appraisal report corresponding with described monitored electrical equipment from described database.
Preferably, described insulation parameter information comprises the value informations such as leakage current information and dielectric loss angle; In S1, the collection of described on-the-spot insulating monitoring unit the insulation parameter information storing monitored electrical equipment are specially:
S11, low current sensor described in each gathers the crude sampling information of the analog signal format of described monitored electrical equipment;
S12, described crude sampling information is sent to described analog-to-digital conversion module by described low current sensor, by described analog-to-digital conversion module, described crude sampling information is converted to the sample information of digital signals format, and then serial input is in described master controller;
S13, described master controller carries out analysis to the sample information of described digital signals format and judges, the leakage current values and the dielectric loss angle that obtain described monitored electrical equipment are equivalent;
S14, described leakage current values and dielectric loss angle equivalence are stored in described memory module by described master controller.
Preferably, before S1, further comprising the steps of: described host computer sends to described on-the-spot insulating monitoring unit the notification message starting sampling; And/or
In S2, described data calling request comprises the calling request of calling all insulation parameter information, and, call the calling request of specific insulation parameter information; And/or
After S1, also comprise: when the described insulation parameter information dropout that network service is broken down or described on-the-spot insulating monitoring unit stores, described host computer sends to described on-the-spot insulating monitoring unit the notification message starting watchdog reset function.
Preferably, in S3, described host computer carries out analysis to the described insulation parameter information received and judges, the state of insulation appraisal report obtaining described monitored electrical equipment is specially:
Described host computer sets up insulation dynamic model, and the described insulation parameter information received is inputted described insulation dynamic model, then obtains the state of insulation appraisal report of described monitored electrical equipment by running described insulation dynamic model; Wherein, the parameter used in described insulation dynamic model comprises the dielectric loss angle of the humidity of environment, the leakage current of electrical equipment and electrical equipment residing for the temperature of environment residing for the voltage of electrical equipment, electrical equipment, electrical equipment.
Preferably, after S3, also comprise:
S5, when described host computer draws the state of insulation of described monitored electrical equipment lower than default extreme value, sends alerting signal.
Beneficial effect of the present invention is as follows:
Insulated on-line monitoring system provided by the invention and method, be adapted to the serious place of the interference of electromagnetic field such as traction substation very much, has high reliability and monitoring accuracy, thus realize the permanently effective monitoring to insulation of electrical installation state; Further, can also monitor multiple insulation parameters of multiple stage electrical equipment simultaneously simultaneously, thus reduce monitoring cost, alleviate the working strength of monitoring personnel.
Accompanying drawing explanation
Fig. 1 is the structural representation of insulated on-line monitoring system provided by the invention;
Fig. 2 is the structural representation of on-the-spot insulating monitoring unit provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, insulated on-line monitoring system provided by the invention and method are described in detail:
As shown in Figure 1, the invention provides a kind of insulated on-line monitoring system, comprising: remote monitoring platform, host computer, CAN turn Ethernet Adaptation Unit and at least one on-the-spot insulating monitoring unit; Described on-the-spot insulating monitoring unit is for monitoring the state of insulation of the electrical equipment being arranged on traction substation; Described in each, on-the-spot insulating monitoring unit is connected with one end that described CAN turns Ethernet Adaptation Unit by CAN, the other end that described CAN turns Ethernet Adaptation Unit is connected with one end of described host computer, and the other end of described host computer is connected with described remote monitoring platform by database.Wherein, in the present invention, electrical equipment includes but not limited to primary side bushing shell for transformer, current transformer, voltage transformer (VT) and lightning arrester.Turn Ethernet Adaptation Unit by CAN, achieve the function intercomed mutually of CAN network and Ethernet.
As shown in Figure 2, described in each, on-the-spot insulating monitoring unit comprises: master controller, power module, memory module, analog-to-digital conversion module, at least one low current sensor, at least one voltage sensor, at least one temperature sensor, at least one humidity sensor and at least one well heater; Described master controller is connected with described power module, described memory module, described temperature sensor, described humidity sensor and described well heater respectively; Described master controller is also connected with described low current sensor by described analog-to-digital conversion module, and described master controller is also connected with described voltage sensor by described analog-to-digital conversion module.Wherein, shown in Figure 2, master controller is connected with described well heater by after driving circuit and relay successively; Described master controller is LPC1768 controller; Described power module is digital power module or analog power module, more specifically, can adopt AC220V Power supply, uses Sai Side Switching Power Supply to convert suitable voltage to.Wherein use two positive and negative 12V power supplys of 12V electric power generating composition to power for low current sensor, wherein get positive 12V power supply changes into needs simulation 5V voltage by 7809 and 7805 liang of chip blocks; The Sai Side power supply using one to turn 5V provides 5V voltage for digital circuits section, and provides 3.3V voltage by LM2576.Described memory module is eeprom memory; Described analog-to-digital conversion module is AD765616 position analog-to-digital conversion module, concrete, can adopt AD7656 high precision 16 analog-digital chips, by hardware phase lock high precision loop technique, controls the sample frequency of A/D chip, and the most high sampling rate of this chip is 250Kps.Control chip LPC1768 uses external interrupt mode to start SSP0, communicates with analog-to-digital conversion module.Described low current sensor is Zero flux punching low current sensor, due to traction substation electromagnetic environment very severe, for can the leakage current of Measurement accuracy microampere order and low-angle dielectric loss angle, therefore, select non-contact measurement, namely by magnetic flux punching low current sensor, do not changing under an original wiring prerequisite of electrical equipment, having and well follow the tracks of the small amplitude of leakage current and the function of phase place; Described master controller is also provided with CAN interface, RS485 interface, Ethernet interface RS485 network interface, RS232 debugging interface, I2C interface, SSP0 interface.On-the-spot insulating monitoring cellular installation is on-the-spot at electrical substation monitoring, completes collection and the computational analysis of various line monitor signal, turns Ethernet Adaptation Unit, Ethernet communicates with host computer by CAN, CAN, upload the insulation parameter of electrical equipment.Host computer, for managing each on-the-spot insulating monitoring unit, realizes fault diagnosis, fault alarm, history data store, trend analysis and report printing function.Further, on-the-spot insulating monitoring unit needs with other parts independent on mounting structure and circuit function, ensures the stable operation not affecting electrical equipment to be monitored.
Low current sensor and the voltage sensor quantity of on-the-spot insulating monitoring cellular installation adjust according to actual needs, when being connected with 3 low current sensors and 3 voltage sensors, then can gather and calculate the voltage and current of 3 electrical equipments, called after Isulatorl, Isulator2 and Isulator3 respectively, the data of 6 road AD are read by SSP0 interface serial, wherein Timer2 catches measuring-signal frequency, Timer1 automatically exports square wave and controls sampling rate, and Timer0 returns the function in 50HZ cycle as sampling during dropout measuring period.By this mounting means, the parallel processing capability of on-the-spot insulating monitoring unit can be improved.
Insulated on-line monitoring system provided by the invention is divided into three-decker: ground floor is remote monitoring platform, checks field monitoring data by IE browser interface; The second layer is host computer, turns Ethernet Adaptation Unit and on-the-spot insulating monitoring unit communication by CAN, controls its sampling, data calling and parameter modification; Third layer is on-the-spot insulating monitoring unit, is mainly used in the insulation parameter information gathering monitored electrical equipment.
The method of the above-mentioned insulated on-line monitoring system of application provided by the invention, comprises the following steps:
S1, the collection of described on-the-spot insulating monitoring unit also stores the insulation parameter information of monitored electrical equipment, and wherein, the data layout of described insulation parameter information is the data layout meeting the CAN network transmission protocol; When receiving the data calling request that described host computer sends, described insulation parameter information is uploaded to described CAN by CAN network and turns Ethernet Adaptation Unit by described on-the-spot insulating monitoring unit;
Wherein, insulation parameter information comprises the value informations such as leakage current information and dielectric loss angle; In this step, the collection of described on-the-spot insulating monitoring unit the insulation parameter information storing monitored electrical equipment are specially:
S11, low current sensor described in each gathers the crude sampling information of the analog signal format of described monitored electrical equipment;
S12, described crude sampling information is sent to described analog-to-digital conversion module by described low current sensor, by described analog-to-digital conversion module, described crude sampling information is converted to the sample information of digital signals format, and then serial input is in described master controller;
S13, described master controller carries out analysis to the sample information of described digital signals format and judges, the leakage current values and the dielectric loss angle that obtain described monitored electrical equipment are equivalent;
S14, described leakage current values and dielectric loss angle equivalence are stored in described memory module by described master controller.
S2, it is the data layout meeting Ethernet host-host protocol that described CAN turns Ethernet Adaptation Unit by the Data Format Transform of described insulation parameter information, obtain the insulation parameter information meeting Ethernet host-host protocol, then the described insulation parameter information meeting Ethernet host-host protocol is transferred to described host computer by Ethernet;
S3, described host computer carries out analysis to the described insulation parameter information received and judges, obtains the state of insulation appraisal report of described monitored electrical equipment, and is stored in described database by described state of insulation appraisal report;
Wherein, in S3, described host computer carries out analysis to the described insulation parameter information received and judges, the state of insulation appraisal report obtaining described monitored electrical equipment is specially:
Described host computer sets up insulation dynamic model, and the described insulation parameter information received is inputted described insulation dynamic model, then obtains the state of insulation appraisal report of described monitored electrical equipment by running described insulation dynamic model; Wherein, the parameter used in described insulation dynamic model comprises the dielectric loss angle of the humidity of environment, the leakage current of electrical equipment and electrical equipment residing for the temperature of environment residing for the voltage of electrical equipment, electrical equipment, electrical equipment.
Because the change of the insulating property of insulation of electrical installation material is by many factors, very complicated, the present invention follows the mathematical relation of the factors vary such as primary equipment voltage, environment temperature, ambient humidity and self history accumulation temperature rise by the exhausted first performance of research, establish insulation dynamic model, thus strong support is provided from periodic maintenance to State Maintenance to traction substation primary equipment.
S4, described remote monitoring platform reads and shows the described state of insulation appraisal report corresponding with described monitored electrical equipment from described database.
S5, when described host computer draws the state of insulation of described monitored electrical equipment lower than default extreme value, sends alerting signal.After this step can be positioned at S3 or S4.
In addition, in the present invention, before S1, further comprising the steps of: described host computer sends to described on-the-spot insulating monitoring unit the notification message starting sampling; And/or
In S2, described data calling request comprises the calling request of calling all insulation parameter information, and, call the calling request of specific insulation parameter information; And/or
After S1, also comprise: when the described insulation parameter information dropout that network service is broken down or described on-the-spot insulating monitoring unit stores, described host computer sends to described on-the-spot insulating monitoring unit the notification message starting watchdog reset function.
Due to the place that traction substation is an electromagnetic environment very severe, especially the electromagnetic field that the process layer devices near primary equipment suffers is arranged on even more serious, but because process layer devices is a distributed system, the source data collection of the whole intelligent network system of Ye Shi electric substation and the most direct equipment of action executing simultaneously, therefore, the synchronous requirement between the network equipment and enough real-times must be ensured.By CAN technology, be applicable to electrical substation field devices widely distributed and be subject to the serious environment of the interference of electromagnetic field.
In sum, insulated on-line monitoring system provided by the invention and method, be adapted to the serious place of the interference of electromagnetic field such as traction substation very much, has high reliability and monitoring accuracy, thus realize the permanently effective monitoring to insulation of electrical installation state; Further, can also monitor multiple insulation parameters of multiple stage electrical equipment simultaneously simultaneously, thus reduce monitoring cost, alleviate the working strength of monitoring personnel.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should look protection scope of the present invention.
Claims (7)
1. an insulated on-line monitoring system, is characterized in that, comprising: remote monitoring platform, host computer, CAN turn Ethernet Adaptation Unit and at least one on-the-spot insulating monitoring unit; Described on-the-spot insulating monitoring unit is for monitoring the state of insulation of the electrical equipment being arranged on traction substation; Described in each, on-the-spot insulating monitoring unit is connected with one end that described CAN turns Ethernet Adaptation Unit by CAN, the other end that described CAN turns Ethernet Adaptation Unit is connected with one end of described host computer, and the other end of described host computer is connected with described remote monitoring platform by database;
Wherein, described in each, on-the-spot insulating monitoring unit comprises: master controller, power module, memory module, analog-to-digital conversion module, at least one low current sensor, at least one voltage sensor, at least one temperature sensor, at least one humidity sensor and at least one well heater; Described master controller is connected with described power module, described memory module, described temperature sensor, described humidity sensor and described well heater respectively; Described master controller is also connected with described low current sensor by described analog-to-digital conversion module, and described master controller is also connected with described voltage sensor by described analog-to-digital conversion module;
Described master controller is connected with described well heater by after driving circuit and relay successively; Described master controller is LPC1768 controller; Described power module is digital power module or analog power module; Described memory module is eeprom memory; Described analog-to-digital conversion module is AD765616 position analog-to-digital conversion module; Described low current sensor is Zero flux punching low current sensor; Described master controller is also provided with CAN interface, RS485 interface, Ethernet interface RS485 network interface, RS232 debugging interface, I2C interface, SSP0 interface.
2. insulated on-line monitoring system according to claim 1, is characterized in that, described electrical equipment comprises primary side bushing shell for transformer, current transformer, voltage transformer (VT) and lightning arrester.
3. application rights requires a method for insulated on-line monitoring system described in any one of 1-2, it is characterized in that, comprises the following steps:
S1, the collection of described on-the-spot insulating monitoring unit also stores the insulation parameter information of monitored electrical equipment, and wherein, the data layout of described insulation parameter information is the data layout meeting the CAN network transmission protocol; When receiving the data calling request that described host computer sends, described insulation parameter information is uploaded to described CAN by CAN network and turns Ethernet Adaptation Unit by described on-the-spot insulating monitoring unit;
S2, it is the data layout meeting Ethernet host-host protocol that described CAN turns Ethernet Adaptation Unit by the Data Format Transform of described insulation parameter information, obtain the insulation parameter information meeting Ethernet host-host protocol, then the described insulation parameter information meeting Ethernet host-host protocol is transferred to described host computer by Ethernet;
S3, described host computer carries out analysis to the described insulation parameter information received and judges, obtains the state of insulation appraisal report of described monitored electrical equipment, and is stored in described database by described state of insulation appraisal report;
S4, described remote monitoring platform reads and shows the described state of insulation appraisal report corresponding with described monitored electrical equipment from described database.
4. method according to claim 3, is characterized in that, described insulation parameter information comprises the value informations such as leakage current information and dielectric loss angle; In S1, the collection of described on-the-spot insulating monitoring unit the insulation parameter information storing monitored electrical equipment are specially:
S11, low current sensor described in each gathers the crude sampling information of the analog signal format of described monitored electrical equipment;
S12, described crude sampling information is sent to described analog-to-digital conversion module by described low current sensor, by described analog-to-digital conversion module, described crude sampling information is converted to the sample information of digital signals format, and then serial input is in described master controller;
S13, described master controller carries out analysis to the sample information of described digital signals format and judges, the leakage current values and the dielectric loss angle that obtain described monitored electrical equipment are equivalent;
S14, described leakage current values and dielectric loss angle equivalence are stored in described memory module by described master controller.
5. method according to claim 3, is characterized in that,
Before S1, further comprising the steps of: described host computer sends to described on-the-spot insulating monitoring unit the notification message starting sampling; And/or
In S2, described data calling request comprises the calling request of calling all insulation parameter information, and, call the calling request of specific insulation parameter information; And/or
After S1, also comprise: when the described insulation parameter information dropout that network service is broken down or described on-the-spot insulating monitoring unit stores, described host computer sends to described on-the-spot insulating monitoring unit the notification message starting watchdog reset function.
6. method according to claim 3, is characterized in that, in S3, described host computer carries out analysis to the described insulation parameter information received and judges, the state of insulation appraisal report obtaining described monitored electrical equipment is specially:
Described host computer sets up insulation dynamic model, and the described insulation parameter information received is inputted described insulation dynamic model, then obtains the state of insulation appraisal report of described monitored electrical equipment by running described insulation dynamic model; Wherein, the parameter used in described insulation dynamic model comprises the dielectric loss angle of the humidity of environment, the leakage current of electrical equipment and electrical equipment residing for the temperature of environment residing for the voltage of electrical equipment, electrical equipment, electrical equipment.
7. method according to claim 3, is characterized in that, after S3, also comprises:
S5, when described host computer draws the state of insulation of described monitored electrical equipment lower than default extreme value, sends alerting signal.
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| CN105021232A (en) * | 2015-08-06 | 2015-11-04 | 南阳高新区天成电气设备有限公司 | Method and device of humiture on-line monitoring of metal-oxide surge arrester |
| CN107561364A (en) * | 2016-07-01 | 2018-01-09 | 深圳市沃特玛电池有限公司 | Cross one another insulation detecting method and system |
| US10352967B2 (en) * | 2016-11-11 | 2019-07-16 | Fluke Corporation | Non-contact electrical parameter measurement systems |
| CN106841944A (en) * | 2017-01-24 | 2017-06-13 | 安徽锐能科技有限公司 | Battery management system insulating monitoring module detecting device |
| CN108226722A (en) * | 2017-12-19 | 2018-06-29 | 神华集团有限责任公司 | Insulated monitoring method, apparatus and system |
| CN109655704A (en) * | 2019-01-08 | 2019-04-19 | 中国恩菲工程技术有限公司 | Low-voltage insulation monitors system |
| CN109884467B (en) * | 2019-03-04 | 2020-06-02 | 国网湖北省电力有限公司电力科学研究院 | Device and method for insulating fault positioning of insulating tubular bus |
| CN112327209B (en) * | 2020-11-03 | 2022-09-13 | 中车青岛四方机车车辆股份有限公司 | Rail vehicle traction system leakage current detection method and device and rail vehicle |
| CN113466561A (en) * | 2021-07-23 | 2021-10-01 | 广西电网有限责任公司电力科学研究院 | Insulation monitoring system |
| CN117741372B (en) * | 2024-02-20 | 2024-05-10 | 深圳市华科科技有限公司 | On-line monitoring method and system for electrical equipment aiming at insulativity |
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