CN103576057A - On-line insulation monitoring system and on-line insulation monitoring method - Google Patents
On-line insulation monitoring system and on-line insulation monitoring method Download PDFInfo
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Abstract
The invention provides an on-line insulation monitoring system and an on-line insulation monitoring method. The system comprises a remote monitoring platform, an upper computer, a CAN-Ethernet adapter and at least one field insulation monitoring unit, wherein the field insulation monitoring units are used for monitoring the insulation state of electrical equipment installed in a traction substation, the field insulation monitoring units are connected with one end of the CAN-Ethernet adapter through a CAN bus, the other end of the CAN-Ethernet adapter is connected with one end of the upper computer, and the other end of the upper computer is connected with the remote monitoring platform. The on-line insulation monitoring system and the on-line insulation monitoring method have high reliability and monitoring accuracy so as to realize long-term effective monitoring on the insulation state of the electrical equipment; and a plurality of insulation parameters of a plurality of pieces of electrical equipment can be simultaneously monitored, thereby lowering the monitoring cost and alleviating the working intensity of monitoring staff.
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 using in transportation by railroad is had higher requirement, concrete: the electrical equipment using in traction substation need to meet the requirement that line duration is long, power failure detects and servicing time is short; And 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 for adopting the state of insulation of portable instrument monitoring electrical equipment, that is: in the time need to monitoring the state of insulation of some electrical equipments, on this electrical equipment surface, a detecting instrument is installed, thereby is detected the state of insulation of electrical equipment.The major defect of this kind of method existence is: (one) real-time is poor, cannot carry out permanently effective monitoring to the state of insulation of electrical equipment; (2) monitoring efficiency is low, in the time need to monitoring the multiple insulation parameter of a certain electrical equipment, need to use all kinds of detecting instruments, thereby both improve monitoring cost, has increased again monitoring personnel's working strength.
Summary of the invention
The defect existing for prior art, the invention provides a kind of insulated on-line monitoring system and method, has high reliability and monitoring accuracy, thereby realizes the permanently effective monitoring to insulation of electrical installation state; And, can also to a plurality of insulation parameters of many electrical equipments, monitor simultaneously simultaneously, thereby reduce monitoring cost, alleviated monitoring personnel's working strength.
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 that is 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 bus, described CAN turns the other end of Ethernet Adaptation Unit and one end of described host computer is connected, 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 successively by driving circuit with after relay, be connected with described well heater; 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 16 analog-to-digital conversion modules of AD7656; Described low current sensor is zero magnetic 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 of applying above-mentioned insulated on-line monitoring system, comprise the following steps:
S1, described on-the-spot insulating monitoring unit collection the insulation parameter information of storing monitored electrical equipment, wherein, the data layout of described insulation parameter information is the data layout that meets CAN bus network host-host protocol; When receiving the data calling request that described host computer sends, described on-the-spot insulating monitoring unit is crossed CAN bus network by described insulation parameter information exchange and is uploaded to described CAN and turns Ethernet Adaptation Unit;
S2, it is the data layout that meets Ethernet host-host protocol by the Data Format Transform of described insulation parameter information that described CAN turns Ethernet Adaptation Unit, obtain meeting the insulation parameter information of Ethernet host-host protocol, then the described insulation parameter information exchange that meets Ethernet host-host protocol is crossed to Ethernet and be transferred to described host computer;
S3, described host computer is analyzed judgement to the described insulation parameter information receiving, and obtains the state of insulation appraisal report of described monitored electrical equipment, and described state of insulation appraisal report is stored in described database;
S4, the described state of insulation appraisal report that described remote monitoring platform reads from described database and demonstration is corresponding with described monitored electrical equipment.
Preferably, described insulation parameter information comprises the value informations such as leakage current information and dielectric loss angle; In S1, described on-the-spot insulating monitoring unit collection the insulation parameter information of storing monitored electrical equipment are specially:
S11, described in each, low current sensor gathers the crude sampling information of the analog signal format of described monitored electrical equipment;
S12, described low current sensor sends to described analog-to-digital conversion module by described crude sampling information, 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 is analyzed judgement to the sample information of described digital signals format, and the leakage current values and the dielectric loss angle that obtain described monitored electrical equipment are equivalent;
S14, described master controller stores described leakage current values and dielectric loss angle equivalence in described memory module into.
Preferably, before S1, further comprising the steps of: described host computer sends the notification message that starts sampling to described on-the-spot insulating monitoring unit; 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 network service is broken down or during the described insulation parameter information dropout of described on-the-spot insulating monitoring unit storage, described host computer sends the notification message that starts watchdog reset function to described on-the-spot insulating monitoring unit.
Preferably, in S3, described host computer is analyzed judgement to the described insulation parameter information receiving, and the state of insulation appraisal report that obtains described monitored electrical equipment is specially:
Described host computer is set up insulation dynamic model, by the dynamic model that insulate described in the described insulation parameter input information receiving, then by moving described insulation dynamic model, obtains the state of insulation appraisal report of described monitored electrical equipment; Wherein, the parameter of using in described insulation dynamic model comprises the voltage of electrical equipment, the temperature of electrical equipment environment of living in, the humidity of electrical equipment environment of living in, the dielectric loss angle of the leakage current of electrical equipment and electrical equipment.
Preferably, after S3, also comprise:
S5, the state of insulation that draws described monitored electrical equipment when described host computer during 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 are adapted to the serious place of the interference of electromagnetic field such as traction substation very much, have high reliability and monitoring accuracy, thereby realize the permanently effective monitoring to insulation of electrical installation state; And, can also to a plurality of insulation parameters of many electrical equipments, monitor simultaneously simultaneously, thereby reduce monitoring cost, alleviated monitoring personnel's working strength.
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 provided by the invention unit.
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 that is 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 bus, described CAN turns the other end of Ethernet Adaptation Unit and one end of described host computer is connected, 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.By CAN, turn Ethernet Adaptation Unit, realized the function of intercommunication mutually of CAN bus 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 successively by driving circuit with after relay, be connected with described well heater; 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 and by 7809 and 7805 liang of chip blocks, change into the simulation 5V voltage needing; Use a Sai Side power supply that turns 5V partly to provide 5V voltage for digital circuit, and provide 3.3V voltage by LM2576.Described memory module is eeprom memory; Described analog-to-digital conversion module is 16 analog-to-digital conversion modules of AD7656, concrete, can adopt 16 analog-digital chips of AD7656 high precision, by hardware phase lock high precision loop technique, controls the sample frequency of AD chip, and the high sampling rate of this chip is 250Kps.Control chip LPC1768 is used external interrupt mode to start SSP0, communicates by letter with analog-to-digital conversion module.Described low current sensor is zero magnetic flux punching low current sensor, due to traction substation electromagnetic environment very severe, for leakage current and low-angle dielectric loss angle that can Measurement accuracy microampere order, therefore, select non-contact measurement, by magnetic flux punching low current sensor, not changing under an original wiring prerequisite of electrical equipment, there is the amplitude of the small leakage current of good tracking 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 signals, by CAN bus, CAN turn Ethernet Adaptation Unit, Ethernet is communicated by letter with host computer, uploads the insulation parameter of electrical equipment.Host computer is used for managing each on-the-spot insulating monitoring unit, realizes fault diagnosis, fault alarm, history data store, trend analysis and report printing function.And on-the-spot insulating monitoring unit needs with other parts independent in mounting structure and circuit function, guarantees not affect the stable operation of electrical equipment to be monitored.
Low current sensor and the voltage sensor quantity of on-the-spot insulating monitoring cellular installation are adjusted according to actual needs, when being connected with 3 low current sensors and 3 voltage sensors, can gather and calculate the voltage and current of 3 electrical equipments, difference called after Isulatorl, Isulator2 and Isulator3, by the serial of SSP0 interface, read the data of 6 road AD, wherein Timer2 catches measuring-signal frequency, Timer1 automatically exports square wave and controls sampling rate, and as measuring period, sampling during dropout returns the function in 50HZ cycle to Timer0.By this mounting means, can improve the parallel processing capability of on-the-spot insulating monitoring unit.
Insulated on-line monitoring system provided by the invention is divided into three-decker: ground floor is remote monitoring platform, by IE browser interface, checks field monitoring data; The second layer is host computer, by CAN, turns Ethernet Adaptation Unit and on-the-spot insulating monitoring unit communication, controls its sampling, data calling and parameter modification; The 3rd layer is on-the-spot insulating monitoring unit, is mainly used in gathering the insulation parameter information of 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, described on-the-spot insulating monitoring unit collection the insulation parameter information of storing monitored electrical equipment, wherein, the data layout of described insulation parameter information is the data layout that meets CAN bus network host-host protocol; When receiving the data calling request that described host computer sends, described on-the-spot insulating monitoring unit is crossed CAN bus network by described insulation parameter information exchange and is uploaded to described CAN and turns Ethernet Adaptation Unit;
Wherein, insulation parameter information comprises the value informations such as leakage current information and dielectric loss angle; In this step, described on-the-spot insulating monitoring unit collection the insulation parameter information of storing monitored electrical equipment are specially:
S11, described in each, low current sensor gathers the crude sampling information of the analog signal format of described monitored electrical equipment;
S12, described low current sensor sends to described analog-to-digital conversion module by described crude sampling information, 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 is analyzed judgement to the sample information of described digital signals format, and the leakage current values and the dielectric loss angle that obtain described monitored electrical equipment are equivalent;
S14, described master controller stores described leakage current values and dielectric loss angle equivalence in described memory module into.
S2, it is the data layout that meets Ethernet host-host protocol by the Data Format Transform of described insulation parameter information that described CAN turns Ethernet Adaptation Unit, obtain meeting the insulation parameter information of Ethernet host-host protocol, then the described insulation parameter information exchange that meets Ethernet host-host protocol is crossed to Ethernet and be transferred to described host computer;
S3, described host computer is analyzed judgement to the described insulation parameter information receiving, and obtains the state of insulation appraisal report of described monitored electrical equipment, and described state of insulation appraisal report is stored in described database;
Wherein, in S3, described host computer is analyzed judgement to the described insulation parameter information receiving, and the state of insulation appraisal report that obtains described monitored electrical equipment is specially:
Described host computer is set up insulation dynamic model, by the dynamic model that insulate described in the described insulation parameter input information receiving, then by moving described insulation dynamic model, obtains the state of insulation appraisal report of described monitored electrical equipment; Wherein, the parameter of using in described insulation dynamic model comprises the voltage of electrical equipment, the temperature of electrical equipment environment of living in, the humidity of electrical equipment environment of living in, the dielectric loss angle of the leakage current of electrical equipment and electrical equipment.
Because the variation of the insulating property of insulation of electrical installation material is subject to 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 historical accumulation temperature rise by studying exhausted first performance, set up insulation dynamic model, thereby from periodic maintenance to State Maintenance, provide strong support to traction substation primary equipment.
S4, the described state of insulation appraisal report that described remote monitoring platform reads from described database and demonstration is corresponding with described monitored electrical equipment.
S5, the state of insulation that draws described monitored electrical equipment when described host computer during 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 the notification message that starts sampling to described on-the-spot insulating monitoring unit; 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 network service is broken down or during the described insulation parameter information dropout of described on-the-spot insulating monitoring unit storage, described host computer sends the notification message that starts watchdog reset function to described on-the-spot insulating monitoring unit.
Because traction substation is the place of an electromagnetic environment very severe, especially be arranged on the electromagnetic field that near process layer devices primary equipment suffers even more serious, but because process layer devices is a distributed system, the source data collection of the whole intelligent network system of while Ye Shi electric substation and the most direct equipment of action executing, therefore, the synchronous requirement between the essential assurance network equipment and enough real-times.By CAN bussing technique, be applicable to substation field device distribution extensively 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 are adapted to the serious place of the interference of electromagnetic field such as traction substation very much, have high reliability and monitoring accuracy, thereby realize the permanently effective monitoring to insulation of electrical installation state; And, can also to a plurality of insulation parameters of many electrical equipments, monitor simultaneously simultaneously, thereby reduce monitoring cost, alleviated monitoring personnel's working strength.
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 be looked protection scope of the present invention.
Claims (9)
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 that is 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 bus, described CAN turns the other end of Ethernet Adaptation Unit and one end of described host computer is connected, and the other end of described host computer is connected with described remote monitoring platform by database.
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. insulated on-line monitoring system according to claim 1, it is characterized in that, 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.
4. insulated on-line monitoring system according to claim 3, is characterized in that, described master controller successively by driving circuit with after relay, be connected with described well heater; 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 16 analog-to-digital conversion modules of AD7656; Described low current sensor is zero magnetic 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.
5. a method for insulated on-line monitoring system described in application rights requirement 1-4 any one, is characterized in that, comprises the following steps:
S1, described on-the-spot insulating monitoring unit collection the insulation parameter information of storing monitored electrical equipment, wherein, the data layout of described insulation parameter information is the data layout that meets CAN bus network host-host protocol; When receiving the data calling request that described host computer sends, described on-the-spot insulating monitoring unit is crossed CAN bus network by described insulation parameter information exchange and is uploaded to described CAN and turns Ethernet Adaptation Unit;
S2, it is the data layout that meets Ethernet host-host protocol by the Data Format Transform of described insulation parameter information that described CAN turns Ethernet Adaptation Unit, obtain meeting the insulation parameter information of Ethernet host-host protocol, then the described insulation parameter information exchange that meets Ethernet host-host protocol is crossed to Ethernet and be transferred to described host computer;
S3, described host computer is analyzed judgement to the described insulation parameter information receiving, and obtains the state of insulation appraisal report of described monitored electrical equipment, and described state of insulation appraisal report is stored in described database;
S4, the described state of insulation appraisal report that described remote monitoring platform reads from described database and demonstration is corresponding with described monitored electrical equipment.
6. method according to claim 5, is characterized in that, described insulation parameter information comprises the value informations such as leakage current information and dielectric loss angle; In S1, described on-the-spot insulating monitoring unit collection the insulation parameter information of storing monitored electrical equipment are specially:
S11, described in each, low current sensor gathers the crude sampling information of the analog signal format of described monitored electrical equipment;
S12, described low current sensor sends to described analog-to-digital conversion module by described crude sampling information, 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 is analyzed judgement to the sample information of described digital signals format, and the leakage current values and the dielectric loss angle that obtain described monitored electrical equipment are equivalent;
S14, described master controller stores described leakage current values and dielectric loss angle equivalence in described memory module into.
7. method according to claim 5, is characterized in that,
Before S1, further comprising the steps of: described host computer sends the notification message that starts sampling to described on-the-spot insulating monitoring unit; 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 network service is broken down or during the described insulation parameter information dropout of described on-the-spot insulating monitoring unit storage, described host computer sends the notification message that starts watchdog reset function to described on-the-spot insulating monitoring unit.
8. method according to claim 5, is characterized in that, in S3, described host computer is analyzed judgement to the described insulation parameter information receiving, and the state of insulation appraisal report that obtains described monitored electrical equipment is specially:
Described host computer is set up insulation dynamic model, by the dynamic model that insulate described in the described insulation parameter input information receiving, then by moving described insulation dynamic model, obtains the state of insulation appraisal report of described monitored electrical equipment; Wherein, the parameter of using in described insulation dynamic model comprises the voltage of electrical equipment, the temperature of electrical equipment environment of living in, the humidity of electrical equipment environment of living in, the dielectric loss angle of the leakage current of electrical equipment and electrical equipment.
9. method according to claim 5, is characterized in that, after S3, also comprises:
S5, the state of insulation that draws described monitored electrical equipment when described host computer during lower than default extreme value, sends alerting signal.
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| 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 |
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| 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 |
| CN112327209A (en) * | 2020-11-03 | 2021-02-05 | 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 |
| CN117741372A (en) * | 2024-02-20 | 2024-03-22 | 深圳市华科科技有限公司 | On-line monitoring method and system for electrical equipment aiming at insulativity |
| 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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