CN106595900A - Extra-high-voltage cable fault monitoring system - Google Patents
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Abstract
本发明涉及一种超高压电缆故障监测系统，属于供电安全技术领域，在三相高压电缆两端分别设置电流互感器和电压互感器，电流互感器和电压互感器分别通过信号处理电路及多路同步采样ADC连接微处理器及附属电路，微处理器及附属电路通过无线传输单元和无线接收单元连接主控单元，微处理器及附属电路上设置GPS接收模块；三相高压电缆侧面设置凹槽，凹槽内设置光纤测温电缆，光纤测温电缆通过数据选择器连接测温主机，测温主机连接主控单元，三相高压电缆的中间接头上设置温度传感器，温度传感器通过信号处理电路连接主控单元；本发明结构简单，能够实现温度和绝缘状况的实时检测，保证高压电缆安全运行。
The invention relates to an ultra-high voltage cable fault monitoring system, which belongs to the technical field of power supply safety. A current transformer and a voltage transformer are respectively arranged at two ends of a three-phase high-voltage cable. The current transformer and the voltage transformer are respectively passed through a signal processing circuit and a multi-channel The synchronous sampling ADC is connected to the microprocessor and the auxiliary circuit, the microprocessor and the auxiliary circuit are connected to the main control unit through the wireless transmission unit and the wireless receiving unit, the GPS receiving module is set on the microprocessor and the auxiliary circuit; the groove is set on the side of the three-phase high-voltage cable , the optical fiber temperature measurement cable is installed in the groove, the optical fiber temperature measurement cable is connected to the temperature measurement host through the data selector, the temperature measurement host is connected to the main control unit, the temperature sensor is installed on the middle joint of the three-phase high-voltage cable, and the temperature sensor is connected through the signal processing circuit Main control unit: The invention has a simple structure, can realize real-time detection of temperature and insulation conditions, and ensures safe operation of high-voltage cables.
Description
技术领域technical field
本发明涉及一种超高压电缆故障监测系统，属于供电安全技术领域。The invention relates to an ultra-high voltage cable fault monitoring system, which belongs to the technical field of power supply safety.
背景技术Background technique
随着电网安全运行要求的不断提高，电力电缆得到了越来越广泛的应用，但是电力电缆普遍应用的日益增大，使得常规的巡视运维手段受到的较大的限制，由于电缆故障会引起高危、高风险或需要高供电可靠性等行业的运营风险，因此，提升高压电缆的监测水平，保证电网的安全运行是势在必行的。With the continuous improvement of the safe operation requirements of the power grid, power cables have been more and more widely used, but the increasing use of power cables has greatly restricted the conventional inspection and maintenance methods, because cable failures will cause Therefore, it is imperative to improve the monitoring level of high-voltage cables to ensure the safe operation of the power grid.
目前，在进行高压电缆监测时，由于高压电缆承受高电压、大电流，长期连续运行，电缆的温度容易升高，无论是电缆的过负荷运行，还是运行环境发生变化，或者是本身发生故障，都会引起温度的变化，若长时间持续升温得不到及时处理，最终都会导致电缆故障发生。目前，在进行温度监测时，通常是在电缆安装管道内或电缆接头处设置温度传感器，但是检测效果不好，而且对于电缆在安装和长时间使用过程中，会出现绝缘受损的情况，不但会使得电缆的安全运行得不到保障，还会带来较大的经济损失。At present, when monitoring high-voltage cables, because the high-voltage cables are subjected to high voltage and high current and run continuously for a long time, the temperature of the cables is easy to rise. Both will cause temperature changes. If the temperature continues to rise for a long time and cannot be dealt with in time, it will eventually lead to cable failure. At present, when temperature monitoring is carried out, temperature sensors are usually installed in the cable installation pipe or at the cable joint, but the detection effect is not good, and the insulation damage will occur during the installation and long-term use of the cable, not only The safe operation of the cable will not be guaranteed, and it will also cause greater economic losses.
发明内容Contents of the invention
根据以上现有技术中的不足，本发明要解决的问题是：提供一种结构简单，能够实现温度和绝缘状况的实时检测，保证高压电缆安全运行的超高压电缆故障监测系统。According to the deficiencies in the prior art above, the problem to be solved by the present invention is to provide an ultra-high voltage cable fault monitoring system with a simple structure, which can realize real-time detection of temperature and insulation conditions, and ensure the safe operation of high-voltage cables.
本发明解决其技术问题所采用的技术方案是：The technical solution adopted by the present invention to solve its technical problems is:
所述的超高压电缆故障监测系统，包括三相高压电缆，三相高压电缆两端分别设置电流互感器Ⅰ、电压互感器Ⅰ、电流互感器Ⅱ和电压互感器Ⅱ，电流互感器Ⅰ和电压互感器Ⅰ通过第一信号处理电路及多路同步采样ADC连接微处理器及附属电路，电流互感器Ⅱ和电压互感器Ⅱ通过第二信号处理电路及多路同步采样ADC连接微处理器及附属电路，微处理器及附属电路通过无线传输单元和无线接收单元连接主控单元，微处理器及附属电路上设置GPS接收模块；The ultra-high-voltage cable fault monitoring system includes a three-phase high-voltage cable, and the two ends of the three-phase high-voltage cable are respectively equipped with a current transformer I, a voltage transformer I, a current transformer II and a voltage transformer II, and the current transformer I and the voltage transformer Transformer I is connected to the microprocessor and auxiliary circuits through the first signal processing circuit and multi-channel synchronous sampling ADC, and current transformer II and voltage transformer II are connected to the microprocessor and auxiliary circuits through the second signal processing circuit and multi-channel synchronous sampling ADC. The circuit, the microprocessor and the auxiliary circuit are connected to the main control unit through the wireless transmission unit and the wireless receiving unit, and the GPS receiving module is set on the microprocessor and the auxiliary circuit;
所述的三相高压电缆侧面设置凹槽，凹槽内设置光纤测温电缆，光纤测温电缆通过数据选择器连接测温主机，测温主机连接主控单元，三相高压电缆的中间接头上设置温度传感器，温度传感器通过信号处理电路连接主控单元；The side of the three-phase high-voltage cable is provided with a groove, and an optical fiber temperature measurement cable is arranged in the groove. The optical fiber temperature measurement cable is connected to the temperature measurement host through the data selector, and the temperature measurement host is connected to the main control unit. A temperature sensor is set, and the temperature sensor is connected to the main control unit through a signal processing circuit;
所述的光纤测温电缆的设置方法包括以下步骤：The setting method of the optical fiber temperature measuring cable comprises the following steps:
A、在三相高压电缆的护套的外层开设凹槽；A. Open a groove on the outer layer of the sheath of the three-phase high-voltage cable;
B、将光纤测温电缆放置到凹槽内，然后通过聚氨酯泡沫填缝剂将光纤测温电缆包覆到凹槽内；光纤测温电缆放置过程中若存在中间接头，则光纤测温电缆顺时针旋转绕在中间接头上；B. Place the fiber optic temperature measuring cable in the groove, and then cover the fiber optic temperature measuring cable in the groove with polyurethane foam caulking agent; if there is an intermediate joint during the placement of the fiber optic temperature measuring cable, the fiber optic temperature measuring cable will The hour hand rotates around the middle joint;
C、在三相高压电缆的中间接头处包覆四氟乙烯包覆膜，聚四氟乙烯包覆膜两端固定在中间接头两侧的三相高压电缆上；C. Coat the intermediate joint of the three-phase high-voltage cable with a tetrafluoroethylene coating film, and fix the two ends of the polytetrafluoroethylene coating film on the three-phase high-voltage cable on both sides of the intermediate joint;
D、在三相高压电缆的两端包覆四氟乙烯包覆膜。D. Coat both ends of the three-phase high-voltage cable with tetrafluoroethylene coating film.
所述的超高压电缆故障监测系统通过电流互感器Ⅰ、电压互感器Ⅰ、电流互感器Ⅱ、电压互感器Ⅱ以及GPS接收模块的配合能够同时采集高压电缆两侧的电流信号和电压信号，通过对电流信号和电压信号进行处理后得到相应的电流值和电压值，进而获取电缆主绝缘的泄露电流和电缆电压的相角差的余角，即介质损耗角，进而获取介质损耗因数，能够实时监测出高压电缆的绝缘性；同时，在高压电缆外套的内表面设置光纤测温电缆，能够实现高压电缆的整体温度的监测，将光纤测温电缆设置到凹槽内，避免在长距离安装时光纤测温电缆的损坏，同时在光纤测温电缆外侧设置聚氨酯泡沫填缝剂，一方面能够保证高压电缆的绝缘性，避免了开设凹槽对高压电缆的影响，另一方面能够保证光纤测温电缆的长时间正常使用，延长光纤测温电缆的使用寿命。所述的超高压电缆故障监测系统能够实现绝缘和温度的同时监测，大大提高了高压电缆的安全运行，结构简单，设计合理。The ultra-high-voltage cable fault monitoring system can simultaneously collect current signals and voltage signals on both sides of the high-voltage cable through the cooperation of current transformer Ⅰ, voltage transformer Ⅰ, current transformer Ⅱ, voltage transformer Ⅱ and GPS receiving module. After processing the current signal and voltage signal, the corresponding current value and voltage value are obtained, and then the residual angle of the phase angle difference between the leakage current of the cable main insulation and the cable voltage, that is, the dielectric loss angle, is obtained, and then the dielectric loss factor is obtained, which can be real-time The insulation of the high-voltage cable is monitored; at the same time, an optical fiber temperature measurement cable is installed on the inner surface of the high-voltage cable jacket to monitor the overall temperature of the high-voltage cable. In case of damage to the fiber optic temperature measuring cable, at the same time, a polyurethane foam caulking agent is placed outside the fiber optic temperature measuring cable. On the one hand, it can ensure the insulation of the high voltage cable and avoid the influence of the opening of the groove on the high voltage cable. The normal use of the cable for a long time prolongs the service life of the fiber optic temperature measurement cable. The ultra-high-voltage cable fault monitoring system can realize simultaneous monitoring of insulation and temperature, greatly improves the safe operation of high-voltage cables, and has a simple structure and a reasonable design.
进一步的优选，光纤测温电缆放置过程中若存在中间接头，则光纤测温电缆采用折返敷设方式，沿中间接头的纵向在中间接头两侧往返敷设两次，然后使用尼龙扎带将光纤测温电缆捆绑在中间接头上，再在外层包覆四氟乙烯包覆膜。中间接头是故障出现的高发点，敷设两次保证中间接头温度监测的准确性，在敷设时要保证光纤测温光缆有较大的弯曲半径，且光纤测温光缆之间的表面距离不能小于100mm。Further preferably, if there is an intermediate joint during the placement process of the optical fiber temperature measuring cable, the optical fiber temperature measuring cable is laid back and forth along the longitudinal direction of the intermediate joint on both sides of the intermediate joint twice, and then the optical fiber temperature is measured using nylon cable ties. The cables are bundled on the intermediate connector, and then the outer layer is covered with tetrafluoroethylene coating film. The intermediate joint is a high-incidence point of failure. Lay it twice to ensure the accuracy of the temperature monitoring of the intermediate joint. When laying, it is necessary to ensure that the optical fiber temperature measurement cable has a large bending radius, and the surface distance between the optical fiber temperature measurement optical cables should not be less than 100mm. .
进一步的优选，聚氨酯泡沫填缝剂将光纤测温电缆包覆到凹槽内后高度与三相高压电缆护套的外层持平。持平压紧，美观，降低损坏率。Further preferably, the height of the polyurethane foam sealant covering the optical fiber temperature measuring cable into the groove is equal to the outer layer of the three-phase high voltage cable sheath. Flat and compact, beautiful and reduce damage rate.
进一步的优选，光纤测温电缆通过聚氨酯泡沫填缝剂固定在三相高压电缆内后，在三相高压电缆上间隔包覆聚四氟乙烯包覆膜。设置四氟乙烯包覆膜，能够进一步保证光纤测温电缆的使用寿命，提高绝缘性。Further preferably, after the optical fiber temperature measuring cable is fixed in the three-phase high-voltage cable by a polyurethane foam caulking agent, the three-phase high-voltage cable is coated with a polytetrafluoroethylene coating film at intervals. Setting the tetrafluoroethylene coating film can further ensure the service life of the optical fiber temperature measuring cable and improve the insulation.
进一步的优选，聚四氟乙烯包覆膜的间隔距离为800mm-1000mm。Further preferably, the distance between the polytetrafluoroethylene coating films is 800mm-1000mm.
所述的超高压电缆故障监测系统的检测方法，包括以下步骤：The detection method of the ultra-high voltage cable fault monitoring system comprises the following steps:
A、通过电流互感器Ⅰ和电流互感器Ⅱ同时测量三相高压电缆两端的电流信号，电流信号分别通过第一信号处理电路及多路同步采样ADC和第二信号处理电路及多路同步采样ADC将电流信号处理后传送至微处理器及附属电路，微处理器及附属电路将电流信号通过无线传输单元传送到主控单元，获取电流值的差值；A. Simultaneously measure the current signals at both ends of the three-phase high-voltage cable through the current transformer Ⅰ and the current transformer Ⅱ, and the current signals pass through the first signal processing circuit and the multi-channel synchronous sampling ADC and the second signal processing circuit and the multi-channel synchronous sampling ADC respectively. After the current signal is processed, it is sent to the microprocessor and the auxiliary circuit, and the microprocessor and the auxiliary circuit transmit the current signal to the main control unit through the wireless transmission unit to obtain the difference of the current value;
B、通过电压互感器Ⅰ和电压互感器Ⅱ同时测量三相高压电缆两端的电压信号，电压信号分别通过第一信号处理电路及多路同步采样ADC和第二信号处理电路及多路同步采样ADC将电压信号处理后传送至微处理器及附属电路，微处理器及附属电路将电压信号通过无线传输单元传送到主控单元，获取得到电缆电压值；B. Simultaneously measure voltage signals at both ends of the three-phase high-voltage cable through voltage transformer Ⅰ and voltage transformer Ⅱ, and the voltage signals pass through the first signal processing circuit and multi-channel synchronous sampling ADC and the second signal processing circuit and multi-channel synchronous sampling ADC respectively After the voltage signal is processed, it is sent to the microprocessor and the auxiliary circuit, and the microprocessor and the auxiliary circuit transmit the voltage signal to the main control unit through the wireless transmission unit to obtain the cable voltage value;
C、主控单元通过获取得到的电流值的差值和电缆电压值得到介质损耗角，进而得到介质损耗因数，通过介质损耗因数监测三相高压电缆的绝缘水平；C. The main control unit obtains the dielectric loss angle by obtaining the difference between the obtained current value and the cable voltage value, and then obtains the dielectric loss factor, and monitors the insulation level of the three-phase high-voltage cable through the dielectric loss factor;
D、通过光纤测温电缆和测温主机实时获取三相高压电缆的温度，将温度信号传送至主控单元。D. Obtain the temperature of the three-phase high-voltage cable in real time through the optical fiber temperature measurement cable and the temperature measurement host, and transmit the temperature signal to the main control unit.
E、通过温度传感器监测中间接头的温度，温度传感器将温度信号通过信号处理单元传送至主控单元。E. Monitor the temperature of the intermediate joint through a temperature sensor, and the temperature sensor transmits the temperature signal to the main control unit through the signal processing unit.
F、主控单元通过介质损耗因数、电缆温度以及中间接头温度的变化实时监测高压供电电缆。F. The main control unit monitors the high-voltage power supply cable in real time through the change of dielectric loss factor, cable temperature and intermediate joint temperature.
进一步的优选，主控单元连接报警装置，在监测到异常时，通过报警装置进行报警。在温度过高或出现绝缘性问题时，及时提醒工作人员，方便工作人员的及时检修，保证电网的安全运行。Further preferably, the main control unit is connected to an alarm device, and when an abnormality is detected, an alarm is issued through the alarm device. When the temperature is too high or there is an insulation problem, the staff will be reminded in time to facilitate the timely maintenance of the staff and ensure the safe operation of the power grid.
本发明所具有的有益效果是：The beneficial effects that the present invention has are:
1、本发明所述的超高压电缆故障监测系统不但能够实时监测高压电缆的温度，还能够实时检测高压电缆的绝缘性，大大提高了供电网高压电缆的运行安全，结构简单，设计合理，具有较强的实用性。1. The ultra-high-voltage cable fault monitoring system described in the present invention can not only monitor the temperature of the high-voltage cable in real time, but also detect the insulation of the high-voltage cable in real time, which greatly improves the operation safety of the high-voltage cable in the power supply network. It has a simple structure and a reasonable design. Strong practicality.
2、本发明所述的超高压电缆故障监测系统通过在整体高压电缆线上设置光纤测温电缆，能够长距离监控高压电缆温度，检测效果好，且将光纤测温电缆设置到高压电缆的外套内，并通过聚氨酯泡沫填缝剂进行包覆，能够延长光纤测温电缆的使用周期，降低系统监测的维护成本，同时在中间接头或高压电缆外侧设置四氟乙烯包覆膜，能够进一步保证光纤测温电缆的使用寿命，提高绝缘性。2. The ultra-high voltage cable fault monitoring system of the present invention can monitor the temperature of the high-voltage cable over a long distance by installing an optical fiber temperature measuring cable on the overall high-voltage cable line, and the detection effect is good, and the optical fiber temperature measuring cable is installed on the jacket of the high-voltage cable It is covered with polyurethane foam sealant, which can prolong the service life of the optical fiber temperature measurement cable and reduce the maintenance cost of system monitoring. Extend the service life of the temperature measuring cable and improve the insulation.
附图说明Description of drawings
图1为本发明的结构示意图；Fig. 1 is a structural representation of the present invention;
其中，1、电压互感器Ⅰ；2、电流互感器Ⅰ；3、三相高压电缆；4、凹槽；5、光纤测温电缆；6、中间接头；7、温度传感器；8、电流互感器Ⅱ；9、电压互感器Ⅱ；10、数据选择器；11、测温主机；12、信号处理电路；13、第一信号处理电路及多路同步采样ADC；14、主控单元；15、无线接收单元；16、第二信号处理电路及多路同步采样ADC；17、微处理器及附属电路；18、无线传输单元；19、GPS接收模块。Among them, 1. Voltage transformer Ⅰ; 2. Current transformer Ⅰ; 3. Three-phase high-voltage cable; 4. Groove; 5. Optical fiber temperature measuring cable; 6. Intermediate joint; 7. Temperature sensor; 8. Current transformer Ⅱ; 9. Voltage transformer Ⅱ; 10. Data selector; 11. Temperature measuring host; 12. Signal processing circuit; 13. First signal processing circuit and multi-channel synchronous sampling ADC; 14. Main control unit; 15. Wireless Receiving unit; 16. Second signal processing circuit and multi-channel synchronous sampling ADC; 17. Microprocessor and auxiliary circuit; 18. Wireless transmission unit; 19. GPS receiving module.
具体实施方式detailed description
下面结合附图对本发明的实施例做进一步描述：Embodiments of the present invention are further described below in conjunction with accompanying drawings:
如图1所示，本发明所述的超高压电缆故障监测系统，包括带有中间接头6的三相高压电缆3，三相高压电缆3两端分别设置电流互感器Ⅰ2、电压互感器Ⅰ1、电流互感器Ⅱ8和电压互感器Ⅱ9，电流互感器Ⅰ2和电压互感器Ⅰ1通过第一信号处理电路及多路同步采样ADC13连接微处理器及附属电路17，电流互感器Ⅱ8和电压互感器Ⅱ9通过第二信号处理电路及多路同步采样ADC16连接微处理器及附属电路17，微处理器及附属电路17通过无线传输单元18和无线接收单元15连接主控单元14，微处理器及附属电路17上设置GPS接收模块19。As shown in Figure 1, the ultra-high voltage cable fault monitoring system of the present invention includes a three-phase high-voltage cable 3 with an intermediate joint 6, and the two ends of the three-phase high-voltage cable 3 are respectively provided with a current transformer I2, a voltage transformer I1, The current transformer II8 and the voltage transformer II9, the current transformer I2 and the voltage transformer I1 are connected to the microprocessor and the auxiliary circuit 17 through the first signal processing circuit and the multi-channel synchronous sampling ADC13, and the current transformer II8 and the voltage transformer II9 are passed through The second signal processing circuit and multi-channel synchronous sampling ADC16 are connected to the microprocessor and the auxiliary circuit 17, and the microprocessor and the auxiliary circuit 17 are connected to the main control unit 14 through the wireless transmission unit 18 and the wireless receiving unit 15, and the microprocessor and the auxiliary circuit 17 The GPS receiver module 19 is set on it.
所述的三相高压电缆3侧面设置凹槽4，凹槽4内设置光纤测温电缆5，光纤测温电缆5通过数据选择器10连接测温主机11，测温主机11连接主控单元14，三相高压电缆3的中间接头6上设置温度传感器7，温度传感器7通过信号处理电路12连接主控单元14。其中，光纤测温电缆5的设置方法包括以下步骤：A groove 4 is arranged on the side of the three-phase high-voltage cable 3, and an optical fiber temperature measurement cable 5 is arranged in the groove 4. The optical fiber temperature measurement cable 5 is connected to the temperature measurement host 11 through the data selector 10, and the temperature measurement host 11 is connected to the main control unit 14. A temperature sensor 7 is arranged on the intermediate joint 6 of the three-phase high-voltage cable 3 , and the temperature sensor 7 is connected to the main control unit 14 through the signal processing circuit 12 . Wherein, the setting method of optical fiber temperature measuring cable 5 comprises the following steps:
A、在三相高压电缆3的护套的外层开设凹槽4；A. Open a groove 4 on the outer layer of the sheath of the three-phase high-voltage cable 3;
B、将光纤测温电缆5放置到凹槽4内，然后通过聚氨酯泡沫填缝剂将光纤测温电缆5包覆到凹槽4内；光纤测温电缆5放置过程中若存在中间接头6，则光纤测温电缆5顺时针旋转绕在中间接头6上；聚氨酯泡沫填缝剂将光纤测温电缆5包覆到凹槽4内后高度与三相高压电缆3护套的外层持平。B. Place the optical fiber temperature measuring cable 5 in the groove 4, and then cover the optical fiber temperature measuring cable 5 in the groove 4 with polyurethane foam caulking agent; if there is an intermediate joint 6 during the placement of the optical fiber temperature measuring cable 5, Then the optical fiber temperature measuring cable 5 rotates clockwise around the intermediate joint 6; the polyurethane foam caulking agent wraps the optical fiber temperature measuring cable 5 into the groove 4 and the height is equal to the outer layer of the sheath of the three-phase high voltage cable 3 .
C、在三相高压电缆3的中间接头6处包覆四氟乙烯包覆膜，聚四氟乙烯包覆膜两端固定在中间接头6两侧的三相高压电缆3上；C. Coat the intermediate joint 6 of the three-phase high-voltage cable 3 with a tetrafluoroethylene coating film, and fix the two ends of the polytetrafluoroethylene coating film on the three-phase high-voltage cable 3 on both sides of the intermediate joint 6;
D、在三相高压电缆3的两端包覆四氟乙烯包覆膜。D. Cover both ends of the three-phase high-voltage cable 3 with tetrafluoroethylene coating film.
所述的光纤测温电缆5的设置方法中步骤B中，若光纤测温电缆5放置过程中若存在中间接头6，则光纤测温电缆5采用折返敷设方式，沿中间接头6的纵向在中间接头6两侧往返敷设两次，然后使用尼龙扎带将光纤测温电缆5捆绑在中间接头6上，再在外层包覆四氟乙烯包覆膜。In step B of the setting method of the optical fiber temperature measuring cable 5, if there is an intermediate joint 6 during the placement process of the optical fiber temperature measuring cable 5, the optical fiber temperature measuring cable 5 adopts a fold-back laying method, and is placed in the middle along the longitudinal direction of the intermediate joint 6. The two sides of the joint 6 are laid back and forth twice, and then the optical fiber temperature measuring cable 5 is bound to the middle joint 6 with nylon cable ties, and then the outer layer is covered with a tetrafluoroethylene coating film.
所述的光纤测温电缆5通过聚氨酯泡沫填缝剂固定在三相高压电缆3内后，在三相高压电缆3上间隔包覆聚四氟乙烯包覆膜，聚四氟乙烯包覆膜的间隔距离为800mm-1000mm。After the optical fiber temperature measuring cable 5 is fixed in the three-phase high-voltage cable 3 by a polyurethane foam caulking agent, the three-phase high-voltage cable 3 is covered with a polytetrafluoroethylene coating film at intervals, and the polytetrafluoroethylene coating film The interval distance is 800mm-1000mm.
所述的超高压电缆故障监测系统的检测方法，包括以下步骤：The detection method of the ultra-high voltage cable fault monitoring system comprises the following steps:
A、通过电流互感器Ⅰ2和电流互感器Ⅱ8同时测量三相高压电缆3两端的电流信号，电流信号分别通过第一信号处理电路及多路同步采样ADC13和第二信号处理电路及多路同步采样ADC16将电流信号处理后传送至微处理器及附属电路17，微处理器及附属电路17将电流信号处理通过无线传输单元传送到主控单元15，获取电流值的差值；A. Simultaneously measure the current signals at both ends of the three-phase high-voltage cable 3 through the current transformer I2 and the current transformer II8, and the current signals respectively pass through the first signal processing circuit and multi-channel synchronous sampling ADC13 and the second signal processing circuit and multi-channel synchronous sampling The ADC16 processes the current signal and sends it to the microprocessor and the auxiliary circuit 17, and the microprocessor and the auxiliary circuit 17 process the current signal and transmit it to the main control unit 15 through the wireless transmission unit to obtain the difference of the current value;
B、通过电压互感器Ⅰ1和电压互感器Ⅱ9同时测量三相高压电缆3两端的电压信号，电压信号分别通过第一信号处理电路及多路同步采样ADC13和第二信号处理电路及多路同步采样ADC16将电压信号处理后传送至微处理器及附属电路17，微处理器及附属电路17将电压信号通过无线传输单元传送到主控单元14，获取得到电缆电压值；B. Simultaneously measure the voltage signals at both ends of the three-phase high-voltage cable 3 through the voltage transformer I1 and the voltage transformer II9, and the voltage signals respectively pass through the first signal processing circuit and multi-channel synchronous sampling ADC13 and the second signal processing circuit and multi-channel synchronous sampling The ADC16 processes the voltage signal and sends it to the microprocessor and the auxiliary circuit 17, and the microprocessor and the auxiliary circuit 17 transmit the voltage signal to the main control unit 14 through the wireless transmission unit to obtain the cable voltage value;
C、通过获取得到的电流值的差值和电缆电压值得到介质损耗角，进而得到介质损耗因数，通过介质损耗因数监测三相高压电缆3的绝缘水平；C. Obtain the dielectric loss angle by obtaining the difference between the obtained current value and the cable voltage value, and then obtain the dielectric loss factor, and monitor the insulation level of the three-phase high-voltage cable 3 through the dielectric loss factor;
D、通过光纤测温电缆5和测温主机11实时获取三相高压电缆3的温度，将温度信号传送至主控单元14。D. Obtain the temperature of the three-phase high-voltage cable 3 in real time through the optical fiber temperature measuring cable 5 and the temperature measuring host 11 , and transmit the temperature signal to the main control unit 14 .
E、通过温度传感器7监测中间接头6的温度，温度传感器7将温度信号通过信号处理单元12传送至主控单元14。E. Monitor the temperature of the intermediate joint 6 through the temperature sensor 7 , and the temperature sensor 7 transmits the temperature signal to the main control unit 14 through the signal processing unit 12 .
F、主控单元14通过介质损耗因数、电缆温度以及中间接头温度的变化实时监测高压供电电缆，主控单元14连接报警装置，在监测到异常时，通过报警装置进行报警。F. The main control unit 14 monitors the high-voltage power supply cable in real time through changes in dielectric loss factor, cable temperature, and intermediate joint temperature. The main control unit 14 is connected to an alarm device, and when an abnormality is detected, an alarm is issued through the alarm device.
本发明结构简单，设计合理，能够实现温度和绝缘状况的实时检测，保证高压电缆安全运行，具有较强的实用性。The invention has simple structure and reasonable design, can realize real-time detection of temperature and insulation status, ensures safe operation of high-voltage cables, and has strong practicability.
本发明并不仅限于上述具体实施方式，本领域普通技术人员在本发明的实质范围内做出的变化、改型、添加或替换，也应属于本发明的保护范围。The present invention is not limited to the above-mentioned specific implementation methods, and changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention should also fall within the protection scope of the present invention.
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