CN108376884A - A kind of conductor temperature measuring type T-type cable connector device - Google Patents

Abstract

Translated fromChinese

本发明公开了一种导体测温型T型电缆接头装置，属于电力设备监测领域，该装置包括：紧贴T型电缆接头导体端子或与之相连接尾塞金属体表面的传感器和外部温度显示装置。安装于接头内部的传感器不使用电池，不需要维护。传感器整体位于导体等位体内部，不会对T型电缆接头电场设计产生负面影响，传感器与T型电缆接头在整个使用寿命期间可以长期工作。本发明通过监测该点的温度，可以及时发现T型电缆接头端子与设备连接不良，可以设定对应的报警温度，避免进一步引发故障。另一方面可以收集整个运行期间的数据，监测整个回路的负荷情况，可以为负荷的调整提供依据。

The invention discloses a conductor temperature measuring type T-shaped cable joint device, which belongs to the field of electric equipment monitoring. The device comprises: a sensor close to the conductor terminal of the T-shaped cable joint or connected to the surface of the metal body of the tail plug and an external temperature display device . The sensor mounted inside the connector is battery-free and requires no maintenance. The sensor is located inside the conductor equivalent body as a whole, which will not have a negative impact on the electric field design of the T-shaped cable joint. The sensor and the T-shaped cable joint can work for a long time during the entire service life. By monitoring the temperature at this point, the present invention can detect in time that the T-shaped cable joint terminal is poorly connected to the equipment, and can set a corresponding alarm temperature to avoid further failures. On the other hand, it can collect data during the entire operation period, monitor the load condition of the entire circuit, and provide a basis for load adjustment.

Description

Translated fromChinese

一种导体测温型T型电缆接头装置A conductor temperature measuring type T-shaped cable joint device

技术领域technical field

本发明属于电力设备中电缆接头测温领域，具体涉及对电缆导体温度进行实时的监测的电缆接头装置。The invention belongs to the field of temperature measurement of cable joints in electric equipment, and in particular relates to a cable joint device for real-time monitoring of the temperature of cable conductors.

背景技术Background technique

随着经济的快速发展，电力的需求也在不断增加。现代社会的生产生活每时每刻都离不开对电的需求，与此同时每一次电网运行故障都会扰乱正常社会的生产和生活，所以电网的安全运行具有相当高的重要性。而设备运行温度是考察一次设备安全运行的一个重要参数，因此电力设备的直接温度监测就具有非常重要的价值。With the rapid development of the economy, the demand for electricity is also increasing. The production and life of modern society are inseparable from the demand for electricity at all times. At the same time, every failure of the power grid will disrupt the production and life of the normal society, so the safe operation of the power grid is of great importance. The operating temperature of the equipment is an important parameter to investigate the safe operation of the primary equipment, so the direct temperature monitoring of the power equipment has very important value.

在电力系统中，电流主要通过导体进行传输，是发热的源头，其它外部的发热多数源于载流的导体，但无论是低压还是高压导体，均与外部有绝缘隔离。电压越高，绝缘层越厚，电压超过3kV时，绝缘内外均会设计半导电层进行电场均化，随着电压的升高，供电的范围会扩大，线路的重要性也渐渐提高。因此如何对导体的运行温度进行直接测量对运检部门来说显得十分关键和重要，但也存在诸多难点，比如如何让信号穿透绝缘及屏蔽层，这是目前技术手段来讲还是比较困难，同时因为传感器要求完全包覆在绝缘层内部，对于稳定性和免维护的要求非常高。In the power system, the current is mainly transmitted through the conductor, which is the source of heat generation. Most of the other external heat generation comes from the current-carrying conductor, but both low-voltage and high-voltage conductors are insulated from the outside. The higher the voltage, the thicker the insulation layer. When the voltage exceeds 3kV, a semi-conductive layer is designed inside and outside the insulation to equalize the electric field. As the voltage increases, the range of power supply will expand, and the importance of the line will gradually increase. Therefore, how to directly measure the operating temperature of the conductor is very critical and important for the transportation inspection department, but there are still many difficulties, such as how to let the signal penetrate the insulation and shielding layer, which is still relatively difficult in terms of current technical means. At the same time, because the sensor is required to be completely covered in the insulating layer, the requirements for stability and maintenance-free are very high.

针对于以上情况，我们在目前现有测温技术的基础上进行了更一步的研究，目标是对包覆在绝缘层内部的导体进行直接测温。结合先进无线无源传感器的研发和应用，我们采用新型智能无线温度直接监测系统，实现实时有效的直接监测电力设备连接部位温度变化情况。感温元件紧贴在被测物体的表面，真实地反映设备表面的实时温度，并且要求对运行设备没有任何影响。结合后台温度监控系统，当设备的运行温度超过预设告警温度值时，系统自动告警，运行部门及时采取适当的措施，避免由于温度升高而引起设备故障，保证电网安全可靠运行。In view of the above situation, we have carried out further research on the basis of the existing temperature measurement technology, and the goal is to directly measure the temperature of the conductor wrapped inside the insulating layer. Combined with the development and application of advanced wireless passive sensors, we adopt a new type of intelligent wireless temperature direct monitoring system to realize real-time and effective direct monitoring of temperature changes in the connection parts of power equipment. The temperature sensing element is closely attached to the surface of the measured object, which truly reflects the real-time temperature of the surface of the equipment, and requires no influence on the running equipment. Combined with the background temperature monitoring system, when the operating temperature of the equipment exceeds the preset alarm temperature value, the system will automatically alarm, and the operation department will take appropriate measures in time to avoid equipment failure caused by temperature rise and ensure the safe and reliable operation of the power grid.

发明内容Contents of the invention

本发明由内置传感器和外部的接收装置共同组成。内置的传感器由电容和电感串联组成，外形尺寸与尾塞配合，放置在T型接头尾塞内部的金属嵌件内壁或紧贴在金属嵌件正后方浇注在环氧塞中。外部接收装置与传感器不需要直接接触，需要呈同心圆方式放置。电容作为感温元件，与温度呈线性关系。外部接收装置通过谐振来检测传感器中电容与和电感组合体的变化量，再转化成对应的温度值。内置传感器不需要使用电源，外部接收天线需要持续的工作电源，不间断的检测内部传感器参数的变化，从而实现反映出对应的温度关系。The invention is composed of a built-in sensor and an external receiving device. The built-in sensor is composed of capacitance and inductance in series, and its external dimensions match the tail plug. It is placed on the inner wall of the metal insert inside the T-joint tail plug or is cast into the epoxy plug immediately behind the metal insert. The external receiving device and the sensor do not need to be in direct contact, and need to be placed in concentric circles. As a temperature-sensing element, the capacitor has a linear relationship with temperature. The external receiving device detects the variation of the capacitance and inductance combination in the sensor through resonance, and then converts it into a corresponding temperature value. The built-in sensor does not need to use a power supply, and the external receiving antenna needs a continuous working power supply to continuously detect the changes of the internal sensor parameters, so as to reflect the corresponding temperature relationship.

本发明区别于现有的导体在线温度监测装置，所有测温组件均不在接头电场强度分布的范围内，不会影响原有的产品电气性能。测温点与目标点一致，且可以实时传输，能有效反应导体的温度。提高了监测可靠性和耐久性，The present invention is different from the existing on-line temperature monitoring device for conductors, all the temperature measuring components are not within the distribution range of the joint electric field intensity, and will not affect the original electrical performance of the product. The temperature measurement point is consistent with the target point, and can be transmitted in real time, which can effectively reflect the temperature of the conductor. Improved monitoring reliability and durability,

外部的接收装置一方面接收内部的温度信号，同时将该信息传到后台，需要外部供电。On the one hand, the external receiving device receives the internal temperature signal, and at the same time transmits the information to the background, which requires external power supply.

有益效果Beneficial effect

根据需要，可以将传感器内置于T型电缆接头的尾塞内部，也可以在产品安装时，放置在导体上，该装置根据不同的生产厂家，通过调整外形尺寸，可以适用。对于已经安装的产品，可以更换带有传感器的尾塞，即可实现将原有的产品升级成测温型产品。According to the needs, the sensor can be built into the tail plug of the T-shaped cable joint, or placed on the conductor when the product is installed. The device can be applied by adjusting the external dimensions according to different manufacturers. For the products that have already been installed, the tail plug with the sensor can be replaced, and the original product can be upgraded to a temperature-measuring product.

本发明的产品，安装后可以实时监测导体点的，及时反映温度的变化情况，可以帮助为实现以下用途：The product of the present invention can monitor the conductor point in real time after installation, and reflect the change of temperature in time, which can help to achieve the following purposes:

1)减少意外停电：通过三相间进行对比，及时发现温度的异常变化，判定故障隐患1) Reduce unexpected power outages: Through comparison between three phases, abnormal temperature changes can be found in time to determine hidden troubles

2)电缆回路运行的经济性及增容提供依据：实时监测温度，收集一年的用电量情况，可以判定电缆的截面能否增容提供数据支撑。2) The economy of the cable loop operation and the basis for capacity expansion: monitor the temperature in real time, collect the electricity consumption for a year, and determine whether the section of the cable can be increased to provide data support.

附图说明Description of drawings

图1为测温型T型接头传感器和接收装置位置图。Figure 1 is a position diagram of the temperature measuring type T-joint sensor and the receiving device.

图2为测温传感器放置在金属嵌件内壁。Figure 2 shows that the temperature sensor is placed on the inner wall of the metal insert.

图3为测温传感器放置在金属嵌件正后方，浇注在环氧件中：Figure 3 shows that the temperature sensor is placed directly behind the metal insert and cast in epoxy:

图中：1-外置接收天线；2-内置传感器；3-双头螺栓；4-金属嵌件；5-尾塞；6-导体端子。In the figure: 1-external receiving antenna; 2-built-in sensor; 3-stud bolt; 4-metal insert; 5-tail plug; 6-conductor terminal.

具体实施方式Detailed ways

图1为测温型T型接头传感器和接收装置位置图。外部接收装置1放置在T型接头本体外部，与内置传感器2呈同心圆放置。内置传感器2的放置位置与T型接头的内部设计相关，当导体端子6与金属嵌件4围成的腔体有缝隙时可以将内置传感器2放置在金属嵌件4的内壁，该放置方式见图2所述。当导体端子6与金属嵌件4围成的腔体没有缝隙时，只能放置在金属嵌件4尾部5，该放置方式见图3。Figure 1 is a position diagram of the temperature measuring type T-joint sensor and the receiving device. The external receiving device 1 is placed outside the body of the T-shaped joint, and placed in a concentric circle with the built-in sensor 2 . The placement position of the built-in sensor 2 is related to the internal design of the T-joint. When there is a gap in the cavity surrounded by the conductor terminal 6 and the metal insert 4, the built-in sensor 2 can be placed on the inner wall of the metal insert 4. For the placement method, see Figure 2 described. When the cavity surrounded by the conductor terminal 6 and the metal insert 4 has no gap, it can only be placed at the tail 5 of the metal insert 4 , as shown in FIG. 3 .

图2为内置传感器2放置在金属嵌件4内壁。当时产品安装完成后，与导体端子6将与金属嵌件4的紧密结合，只有两者间存在缝隙时，不形成完全封闭的金属腔时才能将信号传到外部。此种结构可用于改造现有的普通T型接头，放入内置传感器2即可实现测温。FIG. 2 shows that the built-in sensor 2 is placed on the inner wall of the metal insert 4 . After the product is installed, the conductor terminal 6 will be closely combined with the metal insert 4. Only when there is a gap between the two, the signal can be transmitted to the outside when a completely closed metal cavity is not formed. This structure can be used to transform the existing common T-shaped joint, and the built-in sensor 2 can be put in to realize temperature measurement.

图3为内置传感2器放置在金属嵌件4尾部，浇铸在环氧绝缘内部。此种情况金属嵌件4需要制作出放内置传感器2的凹槽，保证其处于等位体中，不影响局部放电水平。Figure 3 shows that the built-in sensor 2 is placed at the tail of the metal insert 4 and cast inside the epoxy insulation. In this case, the metal insert 4 needs to make a groove for placing the built-in sensor 2 to ensure that it is in the equipotential body and does not affect the partial discharge level.

Claims (1)

1. a kind of conductor temperature measuring type T-type cable connector device, which is characterized in that by external reception device (1) and built-in sensors(2) it collectively constitutes；

The external reception device (1) is placed on T connector body exterior, is placed in concentric circles with built-in sensors (2)；

The built-in sensors (2) are composed in series by capacitance and inductance, and appearance and size coordinates with tail plug (5), is placed on T connectorMetal insert (4) inner wall inside tail plug, or be tightly attached to metal insert (4) dead astern and be cast in epoxy plug；

The placement location of built-in sensors (2) is related to the interior design of T connector, when conductor terminals (6) and metal insert (4)When the cavity surrounded has the gap, built-in sensors (2) are placed on to the inner wall of metal insert (4)；When conductor terminals (6) and metalWhen the cavity that inserts (4) surrounds does not have gap, metal insert (4) tail portion can only be placed on.