CN201532416U - Intelligent cable monitor - Google Patents

Intelligent cable monitor Download PDF

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Publication number
CN201532416U
CN201532416U CN2009201984905U CN200920198490U CN201532416U CN 201532416 U CN201532416 U CN 201532416U CN 2009201984905 U CN2009201984905 U CN 2009201984905U CN 200920198490 U CN200920198490 U CN 200920198490U CN 201532416 U CN201532416 U CN 201532416U
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China
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circuit
microprocessor
current
cable
sensor
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CN2009201984905U
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Chinese (zh)
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周力忠
孙志飞
张群
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杭州鸿特电器有限公司
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Priority to CN2009201984905U priority Critical patent/CN201532416U/en
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Publication of CN201532416U publication Critical patent/CN201532416U/en

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Abstract

The utility model relates to power equipment and discloses an intelligent cable monitor which comprises two microprocessors, and an electronic circuit connected with the microprocessors to conduct data exchange, wherein the two microprocessors are respectively defined as a first microprocessor and a second microprocessor; the electronic circuit comprises a serial communication interface circuit, a multicircuit relay circuit, a signal shaping circuit, a high-speed comparator circuit, a voltage and frequency converting circuit, a serial liquid crystal display driving circuit, an LED indicator lamp circuit, a keying circuit, current sensors, temperature sensors and a fiber-optical communication module, wherein four current sensors are arranged, and four channels are arranged; six temperature sensors are arranged, and six channels are arranged. The intelligent cable monitor integrates cable current monitoring with switch cabinet temperature monitoring, realizes simultaneous monitoring on two physical quantities, and is specially used for conducting real-time monitoring on the cable current information and the switch cabinet contact temperature information of high-voltage cables of the level of 10kV to 35kV.

Description

电缆智能监测仪 Cable Smart Monitor

技术领域 FIELD

[0001] 本实用新型涉及电力设备,尤其涉及一种电缆监测仪器。 [0001] The present invention relates to a power apparatus, particularly to a cable monitoring apparatus.

背景技术 Background technique

[0002] 随着我国社会与经济的发展,人民生活水平不断提高,防灾减灾越来越为社会所关注,火灾的预防和及时报警已成为城市乡村防灾减灾的一项重要的任务。 [0002] With the social and economic development of China, people's living standards improve, more and more disaster prevention and mitigation of social concern, and timely alarm fire prevention has become an urban village disaster prevention and mitigation of important tasks. 事实上,频频发生的各类火灾事故中,高达70%以上都是不安全用电造成的。 In fact, all kinds of fire accidents frequently occur in up to 70% are caused by unsafe electricity. 随着中国电网大规模改造,城市的电网结构发生了巨大的变化,电力电缆在城市地下管网中呈现多级多回路的特性,以及配网中断路器、负荷开关和环网的结构,在提高用电可靠性的同时也给电网监测带来了新的挑战。 With the large-scale transformation of China's power grid, the grid structure of the city has undergone tremendous changes, power cable presents a multi-stage multi-loop characteristics, structure and distribution network circuit breakers, load switch and ring network in the urban underground pipe network, in improve the reliability of electricity also brought new challenges to grid monitoring.

[0003] 国家在城市电网建设中,要求高压直接进入市区,深入负荷中心,电能通过地下电缆传输,配电设备与周围环境协调一致。 [0003] national power grid construction in the city, requires high pressure directly into the city, in-depth load center, power transmission through underground cables, power distribution equipment coordinated with the surrounding environment. 但与此同时,因输配电设备电压等级提高、自动化及环网的要求、地下电缆的大量使用,导致输配电设备构造越来越复杂,对环境条件的要求也越来越高;一旦输配电设备或电缆发生接地或短路故障,往往会引起区域停电事故,抢修人员往往只能通过排除法,对故障点网络分级分回路一一合闸试投,费时费力,这样既影响供电可靠率,影响电力用户的正常工作和生活,在试投过程中又有可能对电力用户的设备产生冲击或损坏。 At the same time, because of voltage level increase transmission and distribution equipment, a large number of requirements, and underground cables automated ring network, resulting in transmission and distribution equipment structure more complex, demand for increasingly high environmental conditions; once transmission and distribution equipment or cables occurrence of a ground fault or short circuit, the region tends to cause blackouts, repair personnel often only by a process of elimination, the network point of failure fractionation test loop closing eleven administered, time-consuming, so that a reliable power supply affect both rate, affecting the normal work and life power users, there may be an impact on the user's device in power try to vote during or damage.

[0004] 针对电力电缆呈现多级多回路的特性,以及配网中断路器、负荷开关和环网的结 [0004] The characteristics of the power cable for presenting a multi-stage multi-loop of the circuit breaker and distribution network, the load switch and the ring node

构,一旦因故发生故障引发断路器开关跳闸,抢修人员迫切需要通过先进的检测技术手段 Configuration, the tripping initiation circuit breaker switch, repair personnel urgent need advanced detection techniques Once a fault occurs for some reason

快速判断故障区间和故障类型,隔离故障点并尽快恢复未损线路的供电。 To quickly determine the range and type of fault, fault isolation, and to restore the power supply line intact.

[0005] 同时发电厂、变电站的高压开关柜是重要的电器设备。 [0005] Meanwhile power plants, substations High Voltage Switchgear is important electrical equipment. 在设备长期运行过程中,开 In the long-running process equipment, open

关柜中的触点和母线排连接处等部位因老化或接触电阻过大而发热,而这些发热部位的温 And a contact portion connected to the other busbar in the switchgear due to aging or excessive contact resistance generates heat, and the heat-generating parts of the temperature

度无法监测,由此最终导致火灾事故。 Degree can not be monitored, thus resulting in a fire accident.

[0006] 近年来,在电厂和变电站已发生多起开关柜过热事故,造成火灾和大面积的停电事故,解决开关柜过热问题是杜绝此类事故发生的关键。 [0006] In recent years, more than switchgear overheating incidents have occurred in power plants and substations, causing power outages and fires a large area, switchgear overheating problem solving is the key to prevent such accidents. 通过监测电缆电流和开关柜内触点温度的运行情况,可有效防止开关柜的火灾发生并及时提供电缆故障信息,但由于高压开关柜内空间狭小,周围环境均有高压环境,无法进行人工巡查测温,因此实现电流和温度在线监测是保证电力电缆和高压开关柜安全运行的重要手段。 Monitoring current running through the cable and the contact temperature switch cabinet, the switchgear can effectively prevent fire cable faults and provide timely information, but because of limited space within the high voltage switchgear, a high pressure environment are ambient, manual inspection can not be performed temperature, thus achieving current and temperature monitoring is an important means of power cables and high voltage switchgear to ensure safe operation.

[0007] 以前的电缆监测设备功能单一、数据采集独立化、离散化、无网络通信功能、不能有效的远程访问和远程数据智能分析、传输多采用电缆、抗干扰能力差、设备不能大面积系统化管理、智能化程度较低等。 [0007] The previous features a single cable monitoring equipment, data collection of independent, discrete, remote access and remote data intelligent non-network communication functions, can not effectively analysis, using multiple transmission cables, anti-interference ability, the device can not be large-area system management, low intelligence and so on. 这种现状就限制了整个机组的统一化控制管理,给电网管理部门的日常巡检带来较重的负担。 This situation limits the unified control and management of the entire unit, to the daily inspection grid management to bring a heavier burden. 因此,研制、开发、生产一种新型的集高性能智能化短路传感技术、火灾预防报警技术、故障自动识别记录技术于一体的智能化监测设备,对于预防电气短路火灾、保护生命财产都具有十分重大的社会意义和经济意义,也是维护社会稳定保障安全生产的紧迫需求。 Accordingly, research and development, production of a new short-circuit current high-performance intelligent sensing technology, the prevention of fire alarm technology, automatic fault recognition technique recorded in one of the intelligent monitoring device for preventing an electrical short circuit, fire lives and property, have protection of great social and economic significance, but also the urgent need to maintain social stability and ensure safety in production.

[0008] 在已有公开的专利文献中,比如,申请号为200810018813.8,,申请日为2008年1月25日、公开日为2008年8月13日、申请人为东南大学的中国发明专利申请公开了一种多功能电缆故障测试仪,其特征在于该测试仪由现场可编程门阵列芯片、现场可编程门阵列配置存储芯片、串行通信接口电路、发射驱动电路、多路继电器电路、信号调理整形电路、 高速比较器电路、模数转换电路、数控精密电位器、液晶显示器显示电路、发光二极管指示灯电路和按键电路组成。 [0008] In the prior published patent literature, for example, the application number 200810018813.8,, filed January 25, 2008, publication date August 13, 2008, the applicant is of Southeast University Chinese invention patent application publication a multifunctional cable fault tester, wherein the test instrument by a field programmable gate array chip, a field programmable gate array configuration memory chip, a serial communication interface circuit, transmitting the driving circuit, the relay circuit multiplexing, signal conditioning shaping circuit, a high-speed comparator circuit, analog to digital converters, digital precision potentiometers, LCD display circuit, LED indicator circuit and the key circuit. 该发明的测试仪可以测试双绞线的长度、双绞线是否超长、双绞线的连通性(包括开路、短路、反接、错对、超长等故障)、故障类型(包括短路、开路)、故障点位置定位和回波损耗等多项参数,能快速准确获得双绞线的技术参数和实现故障位置检测和定位,具有测试精度高、性能可靠、便携的特点,但是不能有效防止开关柜的火灾发生并及时提供电缆故障信息,因此具有进一步改进和优化的必要。 The invention tester may test length twisted pair, twisted whether long, (, short circuit, reverse, right and wrong, including long open fault), the twisted pair connectivity fault type (including short-circuit, open), the position of the fault point location and return loss and many other parameters, can be obtained quickly and accurately achieve UTP technical parameters and fault detection and location position, with high precision, reliable, portable features, but can not effectively prevent switch cabinet fire cable faults and provide timely information, thus having a need for further improvement and optimization.

发明内容 SUMMARY

[0009] 本实用新型针对现有技术存在的电缆监测设备功能单一、数据采集独立化、离 [0009] The present invention for a single function of monitoring devices of the prior art cable, independent of data acquisition, from

散化、无网络通信功能、不能有效的远程访问和远程数据智能分析、传输多采用电缆、抗 BCH, no network communication function, remote access is not effective and intelligent remote data analysis, multi-use cable transmission, anti

干扰能力差、设备不能大面积系统化管理、智能化程度较低等缺点,提供了一种专门用于 Interference ability, the device can not be a large area of ​​systematic management, low intelligence and other shortcomings, provides a dedicated

10KV-35KV级别的高压电缆进行实时的监测电缆电流信息和开关柜触头温度信息的电缆智 10KV-35KV levels of high-voltage cable for real-time monitoring of cable current contact information and the temperature information switchgear cable wisdom

能监测仪,它将电缆电流监测和开关柜温度监测集于一体,实现两种物理量的同时监测,且 Can simultaneously monitor will monitor the current cable and switchgear temperature monitoring in one set, monitoring implement two physical quantities, and

各自互不影响,但同时能相辅相成的反映电网实际运行情况,提供可靠的数据。 Each independently of each other, but can complement each other to reflect the actual operation of the power grid to provide reliable data.

[0010] 为了解决上述技术问题,本实用新型通过下述技术方案得以解决: [0010] To solve the above problems, the present invention is solved by the following technical scheme:

[0011] 电缆智能监测仪,包括微处理器、与微处理器相连并进行数据交换的电子电路,所 [0011] Cable intelligent monitoring instrument, including a microprocessor, and an electronic circuit connected to the microprocessor and data exchange, the

述微处理器为两个,分别定义为第一微处理器和第二微处理器;所述电子电路包括串行通 It said two microprocessors, are defined as a first microprocessor and a second microprocessor; the electronic circuit comprises serial communication

信接口电路、多路继电器电路、信号整形电路、高速比较器电路、电压与频率转换电路、串行 A communication interface circuit, the multiplexer relay circuit, a signal shaping circuit, the high-speed comparator circuit, a frequency voltage conversion circuit, a serial

液晶显示器驱动电路、发光二极管指示灯电路、按键电路、电流传感器、温度传感器以及光 The liquid crystal display driving circuit, a light emitting diode indicator circuit, key circuit, a current sensor, a temperature sensor and a light

纤通信模块;其中,电流传感器为四个,且设有四个通道,温度传感器为六个,且设有六个通道。 Fiber communication module; wherein the current sensor is four, and is provided with four channels, six of the temperature sensor, and is provided with six channels.

[0012] 高速双嵌入式微处理是整个监测仪的核心器件,控制着整个监测仪的工作和测试数据的处理运算;串行通信接口电路是监测仪与上位计算机之间通信的接口,用于接收上位机的控制命令和实现测试数据的上传;多路继电器电路用于控制远程接点报警;信号整形电路将来自多路传感器的光信号转化为放大了的电压脉冲编码信号;高速比较器电路用于捕捉、采集电缆突发短路的大电流信息,并进行与设定参考电压进行比对,输出控制信号给传感器内的微处理器,进行短路故障的紧急报警;电压与频率转换电路用于将采集到的电压信号转化为相应的频率信号,完成微处理器的前期信号变换;串行液晶显示器驱动电路、显示电路、发光二极管指示灯电路和按键电路组成本系统的人机交互接口,用于显示测试数据、实现功能的选择和参数的设置,电流传 [0012] bis-speed microprocessor is embedded throughout the core of the monitor device, controlling the entire processing operation and monitor the work of test data; interface circuit is a serial communication interface for communication between the monitor and the host computer for receiving control command and test data uploaded to achieve the host computer; multiplexing relay circuit for controlling the remote alarm contacts; signal shaping circuit from the signal into multiple optical sensors for the amplified voltage pulse coded signal; comparator circuit for high-speed capture, collect information sudden short-circuit high-current cable, and with a set reference voltage for comparison, outputs a control signal to the microprocessor in the sensor, a short-circuit fault of the emergency alarm; a voltage converting circuit for frequency acquisition voltage signal into a frequency corresponding to the signal, the microprocessor early completion signal conversion; serial liquid crystal display driving circuit, a display circuit, LED indicator circuit and the key circuit of this system human-computer interaction interface for displaying set the test data to achieve selection and parameter functions, power spread 感器、温度传感器和光纤通信模块完成传感器与微处理之间的数据通信。 Sensors, temperature sensors and fiber optic telecommunications module for data communication between the sensor and the microprocessor.

[0013] 作为优选,所述电流传感器形成的电路包括依次相连的感应信号输入电路、电流与电压的阻抗变换电路、电压与频率转换电路、微处理器对频率进行数字编码电路、微处理器驱动光调制器以及光信号进行光纤传输线路。 [0013] Advantageously, the circuit includes an inductive current sensor formed successively coupled to a signal input circuit, the impedance conversion circuit of current and voltage, and the voltage frequency conversion circuit, the microprocessor of the digital frequency encoding circuit, microprocessor driven optical modulator and an optical signal for fiber transmission line.

[0014] 作为优选,所述温度传感器形成的电路包括依次相连的测量电路、逻辑控制电路、 820nm调制光纤接口和供电电源。 [0014] Advantageously, the temperature sensor circuit comprises a measuring circuit formed by connected in sequence, the logic control circuit, a modulation 820nm optical interface and power supplies. [0015] 作为优选,所述第一微处理器和第二微处理器上连接有应急传感器电路。 [0015] Advantageously, a sensor circuit is connected to the emergency of the first microprocessor and the second microprocessor. 应急传感器电路用于对应急事故进行及时检测报警。 Emergency HazMat sensor circuit for timely detection alarm.

[0016] 本实用新型由于采用了以上技术方案,具有显著的技术效果: [0016] Since the present invention uses the above technical solutions, a significant technical effects:

[0017] 1.在数据采集方面,通过合理运用法拉第电磁感应原理,通过采集电缆周围的电磁涡流实现"磁_电"的转换,可以在电缆发生短路时候进行硬件旁路报警,确保报警信号的可靠性,同时在电缆运行正常的情况下,可以依靠传感器中的锂电池供电进行感应信号的模拟采集。 [0017] 1. In the data collection, through the rational use of the Faraday principle of electromagnetic induction, and "_ magnetic power" converted by the eddy current collecting around the cable, the hardware may be bypassed when the short-circuit cable alarm occurs, the alarm signal to ensure reliability, while the cable runs under normal circumstances, can be induced signal analog acquisition sensors rely lithium battery.

[0018] 2.在数据传输方面,通过运用光纤传输技术、光纤放大技术、传感器技术、串行通信技术、智能远程故障诊断技术。 [0018] 2. In data transmission, through the use of optical fiber transmission technology, optical amplification technology, sensor technology, serial communications technology, intelligent remote fault diagnosis.

[0019] 3.在电源管理方面,采用双MPU设计,温度故障信号采集和报警于接地及短路故障采集完全分开,在电网及外部所有供电电源断电情况下,监测仪可以依靠自身所配置的锂电池进行接地及短路故障信号的正常报警,电池的理论适用寿命为8年,智能节电技术在该产品中得到了合理实施。 [0019] 3. In power management, dual MPU design, temperature fault alarm signal acquisition and a ground fault and short-circuit completely separate collection, and in all external power grid power outage, the monitor can be configured on their own lithium normal ground and short-circuit fault alarm signal, the theoretical cell pot life of 8 years, intelligent power-saving technology has been implemented in the product is reasonable.

[0020] 4.在指示报警方面,采用LED指示灯和LCD液晶屏幕同时显示,通过调节LED驱动的占空比实现报警频率的设定,合理运用LCD显示技术,实现点阵液晶屏幕的驱动,在外部电源失去的情况下,能利用内部锂电池供电,实现LED指示灯可靠报警指示。 [0020] 4. the alarm indication, the use of the LED and the LCD display screen at the same time, to achieve an alarm is set by adjusting the frequency of the LED driving duty ratio, the rational use of LCD display technology, dot-matrix driven LCD screen, in the case where the external power lost, can use the internal battery, the LED achieve a reliable alarm indication.

附图说明 BRIEF DESCRIPTION

[0021] 图1是本实用新型实施例的结构流程框图。 [0021] FIG. 1 is a block flow diagram of an embodiment of the present invention.

[0022] 图2是本实施例中电流传感器电路的结构流程框图。 [0022] FIG. 2 is a block flow block diagram of the current sensor circuit of the present embodiment.

[0023] 图3是本实施例中温度传感器电路的结构流程框图。 [0023] FIG. 3 is a block flow diagram of the temperature sensor circuit in the embodiment of the present embodiment.

[0024] 图4是本实施例中电源管理电路的线路图。 [0024] FIG. 4 is a circuit diagram of the power management circuit in the present embodiment.

[0025] 图5是本实施例中电流传感器电路的线路图。 [0025] FIG. 5 is a circuit diagram of the current sensor circuit of the present embodiment.

[0026] 图6是本实施例中温度传感器电路的线路图。 [0026] FIG. 6 is a circuit diagram of the temperature sensor circuit of the present embodiment.

[0027] 图7是本实施例中串行液晶显示电路的线路图。 [0027] FIG. 7 is a circuit diagram of the serial circuit of the liquid crystal display of the present embodiment.

[0028] 图8是本实施例中串行通信电路的线路图。 [0028] FIG. 8 is a circuit diagram of the serial communication circuit of the present embodiment.

[0029] 图9是本实施例中电源指示电路的线路图。 [0029] FIG. 9 is a circuit diagram of a power indicator circuit in the present embodiment.

[0030] 图10是本实施例中应急传感器电路的线路图。 [0030] FIG. 10 is a circuit diagram of the sensor circuit of the present embodiment of the emergency.

具体实施方式 Detailed ways

[0031] 下面结合附图1至图10与实施例对本实用新型作进一步详细描述: 1 to FIG. 10 and described in the accompanying drawings embodiments of the present invention in further detail for the [0031] below with:

[0032] 实施例电缆智能监测仪,如图1至图10所示,包括第一微处理器4和第二微处理 [0032] Example intelligent monitor cable, as shown in FIGS. 1 to 10, comprising a first microprocessor and the second microprocessor 4

器5、与两个微处理器相连并进行数据交换的电子电路,电子电路包括串行通信接口电路、 5 is connected to the two microprocessors to exchange data and an electronic circuit, the electronic circuit includes a serial communication interface circuit,

多路继电器电路、信号整形电路、高速比较器电路、电压与频率转换电路2、串行液晶显示器 Multiple relay circuit, a signal shaping circuit, the high-speed comparator circuit, voltage and frequency converting circuit 2, a liquid crystal display serial

驱动电路、发光二极管指示灯电路6、按键电路7、电流传感器3、温度传感器1以及光纤通信 A driving circuit, a light emitting diode indicator circuit 6, a key circuit 7, the current sensor 3, a temperature sensor and an optical fiber communication

模块;电流传感器3为四个,且设有四个通道,温度传感器1为六个,且设有六个通道。 Module; four current sensor 3, and is provided with four channels, six of the temperature sensor 1, and is provided with six channels.

[0033] 所述电流传感器3形成的电路包括依次相连的感应信号输入电路31、电流与电压 [0033] The current sensor 3 comprises a circuit formed by sequentially input circuit coupled to the sensing signal 31, current and voltage

的阻抗变换电路32、电压与频率转换电路2、微处理器对频率进行数字编码电路33、微处理 The impedance conversion circuit 32, the voltage frequency conversion circuit 2, the microprocessor of the digital frequency encoding circuit 33, the microprocessor

器驱动光调制器34、以及光信号进行光纤传输线路35。 Optical modulator driver 34, and an optical fiber transmission line 35 signals. [0034] 所述温度传感器1形成的电路包括依次相连的测量电路11、逻辑控制电路12、 820nm调制光纤接口13和供电电源14。 [0034] The circuit includes a temperature sensor measuring circuit 1 is formed of 11 connected in sequence, the logic control circuit 12, 820nm modulating fiber optic interface 13 and power supply 14.

[0035] 所述第一微处理器4和第二微处理器5上连接有应急传感器电路8。 [0035] The first microprocessor circuit 8 is connected to the emergency sensor 54 and the second microprocessor. 应急传感器电路8用于对应急事故进行及时检测报警。 Emergency sensor circuit 8 for HazMat timely detection alarm.

[0036] 本实施例中,包括一个监测仪主机和十个传感器,监测仪主机主要由第一微处理器4、第二微处理器5、以及连接在第一微处理器4和第二微处理器5上的外围电子电路设备组成,十个传感器分别为四个电流传感器3和六个温度传感器1。 [0036] In this embodiment, the monitor comprises a host and ten sensors, host monitor 4 mainly by the first microprocessor, a second microprocessor 5, and a first and a second microprocessor 4 is connected to the micro peripheral processor on the electronic circuit device 5 composed of four ten sensors are current sensors 3 and six temperature sensors 1.

[0037] 其中,四个电流传感器3分别为三个相位传感器和一个接地传感器,均采用光纤作为传输介质。 [0037] wherein the current sensor 3 are four three phase sensor and a sensor ground, are used as the optical transmission medium. 传感器环扣在电缆表面,通过采集电缆周围电磁场的变化实现数据监测。 Buckle sensor surface of the cable, data collected by monitoring changes in the electromagnetic field around the cable. 传感器的采集与电缆的运行互不影响,不会给电网带来任何干扰。 Acquisition and operation of the sensor cable independently of each other, will not cause any disturbance to the grid. 在传输方面传统的传输方式一般为电缆线传输,由于长距离的传输特性会使电缆中的电压信号严重衰减,并且在走线过程中容易出现电缆电磁互扰现象,并且难以解决,所以本实施例采用数字编码光纤传输,光纤中传输的为专用的数字编码信号,区别于传统产品中电缆故障监测的传输方式,并且光信号在光纤中衰减非常小,稳定性很高,不受周围任何磁场的干扰,这样就实现长距离(最大距离80米)无干扰传输。 Conventional transmission transmission transmission cables typically aspect, since the long-distance transmission characteristics of the signal voltage cable will severely attenuated, and the alignment process is prone to electromagnetic mutual interference phenomenon of the cable, and it is difficult to solve, the present embodiment Example encoding digital optical transmission, optical transmission of a dedicated digital signal encoding, transmission mode different from the traditional products of the cable fault detection, and optical signal attenuation in an optical fiber is very small, high stability, without any magnetic field around interference, thus achieving a long distance (the maximum distance of 80 m) without interfering transmissions.

[0038] 电流传感器3的内部电路如图2所示,其工作原理如下: Internal circuit [0038] Current sensor 3 shown in Figure 2, which works as follows:

[0039] 1.传感器主要依靠内置可充电锂电池供电,在电缆中电流运行正常的状态下,传感器首先通过环绕在电缆表面的矽土套环进行电磁感应,将感应到的变化的磁通量涡流转 The [0039] 1. Sensor rely mainly on built-in rechargeable battery, the current running in the cable a normal state, the electromagnetic induction sensor is first surrounded by the surface of the cable Silica collar, the sensed changing magnetic flux vortices turn

换为传感器内部变化的电流,感应到的电流的频率和相位与电缆中实际的频率和相位同 Changed to change the internal current sensor senses the current frequency and phase cable with the actual frequency and phase

止少。 Only small.

[0040] 2.感应电流经过内部电路进行电流_电压的阻抗变化后,进入电压_频率的转换模块,该模块主要完成将一定变化范围的电压信号,转化为0-30KHZ的与之相对应的线性变化的频率信号,以便微处理芯片进行采集和运算,实现了模拟到数字信号的转变。 After conversion module [0040] The induction current impedance voltage change of the current through the internal circuit _, _ frequency voltage into the module to complete a certain variation range of the voltage signal corresponding thereto is converted to a 0-30KHZ linearly varying the frequency of the signal to the microprocessor chip acquisition and calculation, to achieve the transformation of analog to digital signals. [0041] 3.内部微控制处理器通过芯片自身的定时器实现平均每6秒钟(每分钟采集10 个点)进行对(电压-频率模块)采集一次,经过精确的分析计算、模糊冗错、换算为相应的编码,作为光纤中传输的最原始数据。 [0041] 3. The internal micro control processor per 6 seconds (10 minutes per collection points) realization of (voltage - frequency block) by collecting a timer chip itself, through accurate analysis calculations, fault tolerance Fuzzy , converted to a corresponding coding, as most of the original data transmitted in the optical fiber.

[0042] 4.通过光调制器驱动光发射器件进行光纤信号的输入。 [0042] 4. driving the light emitting device through the optical fiber modulator input signal.

[0043] 5.短路预警模块是一个独立于锂电池供电之外的模块,主要有比较器、低通滤波器和基准电压源组成,该电路的电源取自感应电流,当短路故障发生时,传感器中的感应电流将会瞬间增大,感应电压信号幅值也会随之陡升,此时低通滤波、比较器、电压基准将开始工作,实现硬件中断式的报警机制,直接将信号传给微控制芯片的固定10 口,微控制信号接收到该信号后,将会调用专用的短路报警编码,发送给光调制器,用以短路信号的传输。 [0043] The short circuit warning module is independent from the lithium battery module, the main comparator, a low pass filter and a reference voltage source consisting of, from the power supply circuit of the induction current when a short circuit fault occurs, the sensor will sense current increases instantaneously, the induced voltage signal amplitude will also renewed at this time low-pass filter, a comparator, voltage reference will start working, the hardware interrupt mechanism of formula alarm, transmit signals directly fixed to the microcontroller chip 10, the micro control signal after receiving the signal, will be called dedicated short alarm encoded, transmitted to the optical modulator, for transmitting the short-circuit signal. 由于微控制的采样周期为6秒钟一次,短路故障发生时,往往时间级别在毫秒级别,所以,短路预警模块的设计加入彻底解决了众多传统产品误报警和漏报警的缺陷,短路预警模块在该产品中的集成具有重要意义。 Since the sampling period is 6 seconds micro-control time, when the short-circuit failure, often in the millisecond level temporal level, therefore, the short circuit early warning module design added solve the many deficiencies of traditional products leak alarms and false alarms, the short circuit early warning module the product integration is important.

[0044] 6.传感器内置锂电池在实际使用中平均6秒钟采样一次,启动一次电压_频率转换电路,转换时间在毫秒级别,电池的功耗非常小,理论使用年限为8年。 [0044] 6. The sensor built-in lithium in practical use a sampling average of 6 seconds, starting _ primary voltage frequency conversion circuit, the conversion time in the millisecond level, battery power consumption is very small, the theoretical useful life of eight years. 同时传感器电路设计中自带有充电电路,当电池电压低于2. 8V时,比较器翻转可驱动三极管将感应到的电缆中的基础电流进行小电流充电,当电池电压大于等于3. 6V时,比较器再次翻转,充电电路停止工作,实现一次充电过程。 While the sensor circuit design comes with a charging circuit, when the battery voltage is lower than 2. 8V, the comparator can be inverted drive transistor to the base current sensing cable is trickle charge, when the battery voltage is greater than equal to 3. 6V The comparator trips again, the charging circuit stops working, to achieve a charging process. 由于传感器中拥有单独的稳定可靠的电源供电,可使电路的抗干扰能力更强,使恶劣环境下的信号采集工作成为可能。 Since the sensor has a single stable and reliable power supply, make stronger anti-interference circuit, a signal collection work in harsh environment possible.

[0045] 本实施例中,六个温度传感器1分别被安装在开关柜的三个进线和三个出线的触头上,用以实时监测触头温度,判据电缆温度异常,通过传感器采集到的温度数据汇总表, 可预警开关柜中的触点和母线排连接处等部位因老化或接触电阻过大造成的火灾事故。 [0045] In this embodiment, six temperature sensors 1 are mounted on three incoming switchgear and three line contacts, for real-time monitoring the temperature of contact, the cable temperature anomaly criterion, collected by the sensor temperature data summary table, and the contact portion can fire busbar connections and other warning switch cabinet due to aging or excessive contact resistance caused. 可将事故隐患扼杀在萌芽状态,为电力电网的安全运行提供有力的保障。 Accidents can be nipped in the bud, to provide effective protection for the safe operation of power grid.

[0046] 温度传感器1内部含有专用的数字测温元件,可以直接将模拟的温度信息转化为相应的数字信号,通过内置的微控制处理器,将数字信号重新编码,并驱动光调制器进行光纤传输。 An internal [0046] temperature sensor comprising a dedicated digital temperature measuring element, directly analog temperature information into a corresponding digital signal by the built-in micro-processor controlled, re-encode the digital signal, and drives the optical modulator for the optical fiber transmission.

[0047] 温度传感器1的电路结构如图3所示,其工作原理如下: Circuit configuration [0047] The temperature sensor 1 shown in Figure 3, works as follows:

[0048] 1.光纤传输式温度传感器用于测量带电物体表面的温度,如高压开关柜内的裸露触点和母线连接处的运行温度。 [0048] 1. The optical fiber transmission temperature sensor for measuring the temperature of the charged surface of the object, such as operating temperature and exposed contacts at the busbar connections in high voltage switchgear. 传感器是由温度传感器、测量电路、逻辑控制电路、820nm光纤调制接口和供电电路组成,传感器将温度信号调制成光信号,并将光信号通过光纤传导到智能监测仪。 The sensor is a temperature sensor, a measurement circuit, a logic control circuit, and power supply interfaces 820nm optical modulation circuit, the sensor temperature signal to a modulated optical signal, the optical signal transmitted to the monitor via the intelligent fiber.

[0049] 2.光纤温度传感器是一体化结构,采用热縮外套封装,在光纤温度传感器的一个侧面用于检测温度,该传感器适合测温范围低于125t:的环境。 [0049] 2. The optical fiber temperature sensor is integrated structure using heat-shrinkable outer package, a side surface of the optical fiber temperature sensor for detecting a temperature, below the temperature range for the sensor 125t: environment.

[0050] 3.光纤温度传感器内置可充电锂电池,理论工作年限为8年,由于温度传感器为高精度的数字温度传感器所以在整体功耗和采集精度上都达到了同行业的先进水平。 [0050] 3. The optical fiber temperature sensor built-in rechargeable lithium batteries, the theoretical working life of eight years, since the temperature sensor is a digital temperature sensor with high accuracy so the overall power consumption and acquisition accuracy have reached the advanced level of the industry. 常规的温度监测方法主要采用热电偶、热电阻、半导体温度传感器等温度传感元件实现的,这些温度传感器都需要金属导线传输信号,由于无法保证具有稳定的绝缘性能,从而无法在高压开关柜内的触点上使用。 Conventional temperature monitoring methods using thermocouples, thermal resistors, semiconductor temperature sensor, the temperature sensing element to achieve these temperatures are required metal wire sensors transmit signals, insulating properties can not be guaranteed due to the stable, so that not the high voltage switchgears contact use. 采用光纤作为传输介质的温度传感器是用光导纤维传输数字信号,光导纤维具有优异的绝缘性能,能够隔离开关柜内的高压电磁干扰,因此光纤传感器能够直接安装到开关柜内的高压触点上和电缆表面,准确测量高压触点的运行温度以及电缆电流信息,实现开关柜触点运行温度和电缆电流的在线监测。 A temperature sensor using optical fiber as the transmission medium is an optical fiber to transmit digital signals, an optical fiber having an excellent insulating properties, the ability to isolate high-voltage switch cabinet electromagnetic interference, and thus the optical fiber sensor can be mounted directly on the high-voltage contact switch cabinet and cable surface, accurate measurement of high voltage cable and the contact current operating temperature information line monitoring switchgear contacts the cable operating temperature and current.

[0051 ] 本实施例中,监测仪主机采用先进的AI (人工智能)技术和模糊控制技术,通过内建专家数据库,使测量和应用的性能得到了空前的提高。 [0051] In this embodiment, the host monitor advanced AI (artificial intelligence) and fuzzy control, built by expert database, and the measurement performance of the applications has been an unprecedented increase.

[0052] 监测仪主机可靠的性能主要源于该主机采用双处理器的设计,既保证了逻辑运算的速度,同时由于其自身的低功耗特性,使该处理器能在一节锂电池供电的情况下工作,保证了该监测仪在外部电源由于电力系统的故障而失去的情况下也能正常可靠的工作,该监测仪所使用的微处理器由业界著名的德州仪器公司(TI)所开发的MSP430系列的16位微处理器(第一微处理器4)和意法半导体公司(ST)生产的ARM内核的32位微处理器(第二微处理器5)组成。 [0052] The host monitor reliable performance mainly due to the host using the dual processor design, both to ensure the speed of the logic operation, and because of its low power consumption, so that the processor is in a lithium battery power supply work under the circumstances, to ensure that the monitor can be normal and reliable work in the case of an external power supply due to a failure of the power system and lost, the monitor used by the microprocessor industry's leading Texas instruments (TI) of the MSP430 series development of microprocessor 16 (microprocessor 4 first) and STMicroelectronics (ST) produce a 32-bit ARM microprocessor core (second microprocessor 5) components.

[0053] 第一微处理器4的任务机制如下: [0053] The first task of microprocessor mechanism 4 as follows:

[0054] 第一微处理器4依靠其自身的超低功耗的特性主要完成短路和接地故障突发事件的监测,当传感器通过光纤将编码传输到主机的光纤接口之后,首先通过光调制器将光信号转化为数字电平信号,经过阻抗变换光纤信号放大之后提供给第一微处理器4的专用10 口,经过智能校对、模糊冗错、调用专家数据库中的相关数学建模,最终确定故障信息,将故障信息以LED发光闪烁的方式在主机的前面板进行报警指示。 [0054] The first microprocessor 4 by its own main characteristics of ultra-low power short circuit and ground fault monitoring completion of emergencies, when the sensor transmitting the encoded optical interface to the host through the fiber, through the first optical modulator the optical signal is converted into a digital level signal, through the impedance conversion optical signal after amplification is supplied to a first dedicated microprocessor 10 4, through intelligent proofreading, fuzzy fault tolerance, call related mathematical modeling expert database, the final determination fault information, the fault information to the flashing of the LED light alarm indication in the front panel of the host.

[0055] 同时该微处理器会定时监测内置锂电池的电量,在锂电池的电压低于设定值时将驱动充电电路对锂电池充电,在锂电池电量充足的状态下,微处理器会驱动主机面板上的有电指示灯进行有电指示。 [0055] Meanwhile, the microprocessor will periodically monitor the built-in lithium battery in the driving circuit when the charging voltage is lower than the set value for lithium battery, lithium battery, lithium battery at a sufficient state, the microprocessor there were electric lights electric drive host the instructions on the panel.

[0056] 第一微处理器4随时等待第二微处理器5的数据传递,其中包括电流短路故障的报警阀值、接地故障报警阀值、复位控制、自动复位时间设定、自检控制等功能。 [0056] The first microprocessor 4 waits for data transfer at any time of the second microprocessor 5, which includes a current short-circuit fault alarm threshold, a ground fault alarm threshold, reset control, auto-reset time, the self-test control Features. [0057] 第二微处理器5的任务机制如下: [0057] The second microprocessor task mechanism 5 as follows:

[0058] 第二微处理器5采用ST公司的ARM核心的32位控制器,在速度和抗干扰方面表现突出,同时大容量的内存是智能数据库链接调用得到保证,该处理器在产品中主要完成对10个通道的光纤实时信号(电流信号和温度信号)进行采集和处理,电流光信号和温度光信号经过光调制器转变为数字编码的电压信号,并通过阻抗变换实现光纤信号放大,输入ARM处理器的专用10 口进行解码,并调用和记忆智能数据库中的数据链接,自动记录相关接口特征数据,以进行智能类比处理或提交日志,在程序设计时我们赋予了该系统一定的自学习能力,能根据用电高峰期的数据变化自动选择阀值误差,可以有效避免电流浪涌的干扰,能对电网的电流习惯性的瞬间跳变进行智能记忆和学习,特别是季节用电高峰期的各种状况进行有效备份、生成工作日志,并提供串口远程传 [0058] The second microprocessor 5 uses ST's 32-bit ARM core controller performance in terms of speed and interference prominent, while the large-capacity memory is intelligent database link call to be assured that the main processor in the product complete fiber real-time signal (current signal and the temperature signal) 10-channel acquisition and processing, the current optical signal and the temperature of the optical signal through the optical modulator into a digitally encoded voltage signals, and optical signal amplification achieved by the impedance conversion, the input 10 dedicated ARM processor decodes, and call and data link memory intelligent database interface features relevant data automatically recorded to be intelligent processing or commit log analogy, when we design the program gives the system a certain degree of self-learning ability, data changes peak power is automatically selected according to the error threshold, can effectively avoid interference current surge can instantly jump to the current habitual grid becomes intelligent memory and learning, especially in peak season period various conditions for effective backup, generate work logs, and provide serial remote transmission 、打印等。 And printing. 人工智能技术的加入使产品有效的解决了同类监测产品误动作、误报警等缺陷,为电力系统管理部门提供一套完整的现场数据,是高压开关柜安全运行的重要参考。 Adding artificial intelligence technology to make our products effectively solve similar monitoring products malfunction, false alarms and other defects, provides a complete set of field data management system for the power sector, it is an important reference for the safe operation of high voltage switchgear.

[0059] 第二微处理器5在整机的运行过程中负责众多硬件的输入和输出工作,如按键的复位、自检、电流和温度的阀值设定、通道单个自检、数据清零、串行通信数据测试、远程通信、LCD液晶显示以及与第一微处理器4之间的数据交换。 [0059] The second microprocessor 5 is responsible for many hardware input and output operation of the machine during operation, as a reset button, self-test, the threshold current and temperature setting, a single self-test channel, the data is cleared serial communication test data, telecommunications, LCD liquid crystal display, and the exchange of data between the first microprocessor 4.

[0060] 在阀值设定过程中,通过调节面板上面的按键可以控制第二微处理5保存阀值预警数据,设置完成后第二微处理5会自动把数据同步给第一微处理器4进行保存,这样便可以软件修改短路和接地的报警阀值而不像传统电流监测那样要对传感器中的硬件电路进行修改,大大减少了维修和维护人员的劳动工作强度,并确保了工作人员的人身安全。 [0060] In the threshold setting process, the microprocessor may control the second threshold warning data storage 5 by adjusting the above button panel, after setting the second microprocessor 5 will automatically synchronize the data to the first microprocessor 4 save, modify the software so that we can short-circuit and grounding of the alarm threshold rather than the traditional current monitoring of sensors as to hardware modifications, greatly reducing the labor intensity of maintenance work and maintenance personnel, and to ensure that the staff Personal safety. [0061] 在远程数据传输方面,第二微处理器5自带有UART串行通信接口可以实现远程485通信,将实时的温度数据和电流数据上传给上位监控计算机,根据该监测主机的固有地址不同,可实现组网功能,同一网络下可同时实现255台监测主机的集体运作,在增加驱动器的情况下,可以实现更多IP的同时采集,全面提升了网络信息功能,实现了自动化智能监控,解决了传统的管理方式和数据手工记录模式已不能满足现代行业的发展要求。 [0061] In the remote data transmission, second microprocessor 5 comes with a UART serial communication interface 485 may be implemented remote upload real-time temperature data and current data to the monitor computer, the unique address based on the monitored host different, enabling networking capabilities that enable network at the same time under the same collective operation monitoring host 255, in the case of increasing the drive can be achieved at the same time more IP acquisition, enhancing the overall network messaging, automated intelligent monitoring to solve the traditional manual records management and data model can not meet the development requirements of modern industry. [0062] 电力电网电流和温度信息的实时采集、数据统计和查询的网络化已成为现代电力系统提高工作效率,降低电网损失的有效手段。 [0062] real-time collection grid current and temperature information of the power, network statistics and data queries has become an effective means of modern power systems to improve efficiency and reduce grid losses. 要实现现场数据和设备信息的实时采集和数据分析,指令的远程下达以及对设备的控制等功能,迫切要求分布广泛的监测设备实现网络化。 To achieve on-site data and device information in real-time data collection and analysis, remote issued instructions and control functions such as equipment urgently requires widespread monitoring equipment to achieve network.

[0063] 本实用新型具有极高的可靠性和安全性,相对低廉的价格,使得该仪表可以安装到每台高压开关柜上,使开关柜具有智能性,通过上位计算机,可记录开关柜运行的电流和温度数据,为开关柜的维修提供依据,实现了开关柜故障的预知维修。 [0063] The present invention has high reliability and safety, relatively low price, so that the instrument can be mounted on each of high voltage switchgear, the switch cabinet has intelligence, through the host computer, the recording operation of the switch cabinet current and temperature data, provide the basis for the maintenance of the switchgear, the switchgear failure to achieve predictive maintenance.

[0064] 本实用新型主要运用了人工智能技术、模糊控制技术、光纤传输技术等。 [0064] The present invention mainly uses artificial intelligence, fuzzy control technology, optical transmission technology. 它由自含式软件程序构成,利用储存在嵌入式知识库里的信息执行任务,具有一定的智能性和自主学习性;能根据系统定义的规则,主动地识别来自监测终端的数据,并能根据监测接口标准库及规约库生成事件信息,通过软总线发送给信息处理机进行进一步的处理。 It consists of a self-contained software program, using the information stored in the embedded knowledge to perform tasks in, with a certain intelligence and self-learning properties; can take the initiative to the identification data from the monitoring terminal in accordance with system-defined rules, and can It generates event information according to the monitoring interface standard statute database and database information to the processor for further processing by transmitting the software bus. [0065] 采用嵌入式微功耗高速MCU,确保产品低功率消耗的同时实现高速采集能力和响应能力,在软件滤波、光(电)逻辑运算、编码智能校对方面表现突出。 [0065] The embedded micro-power high-speed MCU, while products ensure low power consumption and high-speed responsiveness acquisition capabilities, outstanding software filter, light (electric) logical operations, encoding smart proofreading.

[0066] 在传感器的设计过程中所用到法拉第电磁感应技术、光纤放大技术、传感器技术, 信号传输模块采用光纤传输技术实现光电转换及编码解码,提升产品的抗干扰能力和故障检测能力。 [0066] In the design of the sensor used in the process of Faraday technology, optical amplification technology, sensor technology, signal transmission technology using optical fiber transmission module photoelectric conversion and encoding and decoding, and to enhance the anti-interference ability of the product of fault detection. 无源传感器以及传感器线圈与磁环非接触设计,实现了电网运作与信号的前端采集互不影响,加入内部超载保护电路、精密电压基准、低通滤波电路、峰值保持器、迟滞比较器电路,有效滤除电网噪声,提高了采集精度。 Passive sensors and a sensor coil and magnetic non-contact design, implementation and operation of the front end of the signal acquisition grid independently of each other of an internal overload protection circuits, precision voltage reference, a low pass filter circuit, a peak holder, the hysteresis comparator circuit, effectively filter out noise power grid, improve the accuracy of acquisition.

[0067] 监测主机在设计中分别采用LED显示技术、LCD显示技术、智能节电技术、串行通 [0067] Monitoring host were used in the design of LED display technology, LCD display technology, the intelligent power-saving technology, serial communications

信技术、智能远程故障诊断技术。 Communication technologies, intelligent remote fault diagnosis technology.

[0068] 本实用新型主要解决的关键问题是: [0068] The present invention is mainly to solve the key issues are:

[0069] 在当前的电力系统向着500kV以上超高压、大容量发展中,高压供电设备的运行情况的实时监测尤为重要。 [0069] toward 500kV EHV above the current power system, the development of high-capacity, real-time monitoring of the operation of the high voltage power supply equipment is particularly important. 分析表明,接触电阻,过负荷等因素引起的接头温度过高,是造成电缆接头处绝缘老化引发故障的主要原因,变电站的高压开关柜在长期运行过程中,开关柜触点和母线排连接处等部位因老化或接触电阻过大而发热,而这些发热部位的温度无法监测,由此最终导致火灾事故。 Analysis showed that the temperature of the contact resistance of the joint, due to factors such as overload too high, the risk of failure is the main cause of the aging of the insulating cable joints, high voltage switchgear substation in the long run, switchgear and busbar connection contacts and other parts due to aging or excessive contact resistance generates heat, and the temperature of the heat-generating parts can not be detected, thereby resulting in a fire accident. 因此,如果能够有效的自动监测各节点的温度,一旦出现温度异常情况,立刻上传报警,通知维护人员及时排除隐患,把故障消除在萌芽状态,从而达到安全供电的目的。 Therefore, if the temperature can effectively monitor each node automatically once the temperature abnormality occurs, immediately upload alarm to notify maintenance personnel remove hidden dangers, the failure to nip in the bud, so as to achieve the purpose of security of supply.

[0070] 但是,在电力系统特别是在高压输电系统监测中绝缘和抗电磁干扰是经常碰到的极其关键而又难以解决的问题。 [0070] However, in extremely critical power systems, especially in high-voltage transmission system monitoring insulation and resistance to electromagnetic interference is encountered but often difficult to solve the problem. 长期以来,在电缆温度和电流监测的产品中,一直存在着诸多难以解决的问题,特别是电磁干扰问题,由于开关柜内的高压结构,无法进行人工巡查测温,更不可能使用仪器进行近距离现场电流监测,所以传感器的设计和廉价的传输方案已经成为电力监测系统中最期待解决的问题。 For a long time, the cable temperature and current monitoring products, there has been many difficult problems, especially the problem of electromagnetic interference, due to the structure of the high pressure switch cabinet, manual inspection can not be temperature, more nearly impossible to use the instrument from the current monitoring site, the sensor design and low-cost transmission scheme has become a power monitoring system is the most looking forward to solve the problem.

[0071] 因此,在传感器设计中采用高抗干扰性能的元器件、锂电池独立电源供电、人工智能技术和模糊控制技术的使用、电路板大面积覆铜以增加抗干扰性能、以及采用专用屏蔽壳体的设计方法,有效解决了电磁干扰带来的传感器采集温漂等缺陷。 [0071] Thus, high performance interference components in the sensor design, lithium independent power supply, the use of artificial intelligence and fuzzy control technology, large copper board to increase the resistance to interference, and the use of special shielding design of the housing, effective solution to electromagnetic interference caused by acquisition sensor drift and other defects.

[0072] 本实用新型采用光纤作为传输介质是因为光纤具有抗电磁干扰、电气绝缘、防水、 [0072] The present invention uses the optical fiber as the transmission medium is an optical fiber having anti-electromagnetic interference because, electrical insulation, waterproof,

耐腐蚀和本质安全等特点,光纤是由石英材料制成,具有很高的化学稳定性,应用光纤构成 Corrosion resistance and the nature of security features, the optical fiber is made of quartz material having a high chemical stability, an optical fiber constituting the application

的传感器传输方式,不受电磁干扰的影响,提供完全的电气绝缘特性。 Effect sensors transmission, immune to electromagnetic interference, provide complete electrical insulation properties. 这样就解决了由于高 This would solve due to high

压开关柜内空间狭小,无法进行人工巡查测温,测流以及远距离信号传输等技术难题。 Pressure switch cabinet narrow space, manual inspection can not be temperature, flow measurement and the long-distance signal transmission and other technical problems.

[0073] 通过监测电缆电流和开关柜内触点温度的运行情况,可有效防止开关柜的火灾发 [0073] By monitoring the operation of the switch cabinet and a cable current contact temperature, can effectively prevent hair switch cabinet fire

生并能够及时提供电缆故障信息,避免造成火灾和大面积的停电事故,因此实现温度和电 Health and timely information to provide a cable fault, and to avoid blackouts fire a large area, thereby achieving electrical and temperature

流的在线监测是保证高压开关柜安全运行的重要手段。 Online monitoring of streams is an important means to ensure the safe operation of high voltage switchgear.

[0074] 常规的电流监测方法都是采用互感器法需要外部单独供电,并且信号传输常采用电缆传输,由于长距离的传输特性会使电缆中的电压信号严重衰减,并且在传输走线过程中容易出现电缆电磁互扰现象,在一定程度上给信号的采集带来了额外的误差,且稳定性随着工作时间和电缆表面温度的变化也会给采集造成很大的影响,并且难以解决。 [0074] Conventional methods are using a current transformer monitoring methods require a separate external power supply, signal transmission and cable transmission is often used, since the long-distance transmission characteristics of the signal voltage cable would severely attenuated, and the transmission line during walking cable prone to electromagnetic mutual interference phenomenon, to a certain extent brings additional error to signal acquisition, and stability can make a big impact with changes in working hours and the surface temperature of the cable to the collection, and difficult to solve. 所以本实用新型采用数字编码光纤传输,光纤中传输的为专用的数字编码信号,区别于传统产品中电缆故障监测的传输方式,并且光信号在光纤中衰减非常小,稳定性很高,不受周围任何磁场的干扰,这样就实现长距离(最大距离80米)无干扰传输。 Therefore, the present invention uses a digitally encoded optical transmission, optical transmission of a dedicated digital signal encoding, transmission mode different from the traditional products of the cable fault detection, and optical signal attenuation in an optical fiber is very small, very high stability, not any interference of the surrounding magnetic field, so that long-distance (maximum distance of 80 m) without interfering transmissions. [0075] 常规的温度监测方法主要采用热电偶、热电阻、半导体温度传感器等温度传感元件实现的,这些温度传感器都需要金属导线传输信号,由于无法保证具有稳定的绝缘性能, 从而无法在高压开关柜内的触点上使用。 [0075] Conventional methods using temperature monitoring thermocouple, RTD, semiconductor temperature sensor, the temperature sensing element to achieve these temperatures are required metal wire sensors transmit signals, insulating properties can not be guaranteed due to the stable, so that a high pressure can not use inside the switchgear contacts.

[0076] 由于本实用新型工作在强电磁干扰的特殊环境中,所以在产品设计之初就提出采用光纤作为信号传输的介质材料,在产品运行中将极大程度的实现电气隔离,有效的屏蔽掉电磁干扰,同时绝缘性能非常好,可以使工作人员远离高压危险区域,给维修和维护工作带来极大的方便,因此光纤传传感器能够准确测量高压触点的运行温度以及电缆电流信息,实现开关柜触点运行温度和电缆电流的在线监测。 [0076] Since the present invention works in the special environment of strong electromagnetic interference, so in the beginning proposed design uses the optical fiber as a signal transmission medium material, in a great degree of isolation in the product is run electrically, effective shielding out electromagnetic interference, and very good insulation properties, so that the staff can be away from the high risk areas, repair and maintenance to bring great convenience, so fiber-optic sensor capable of accurately measuring the temperature of the high-voltage contact and the cable current operating information to achieve online monitoring switchgear contacts the cable operating temperature and current.

[0077] 总之,以上所述仅为本实用新型的较佳实施例,凡依本实用新型申请专利范围所作的均等变化与修饰,皆应属本实用新型专利的涵盖范围。 [0077] In summary, the above description is only preferred embodiments of the present invention embodiments, modifications and alterations all under this patent disclosure range made, also belong to scope of the present invention patent.

Claims (4)

  1. 电缆智能监测仪,包括微处理器、与微处理器相连并进行数据交换的电子电路,其特征在于:所述微处理器为两个,分别定义为第一微处理器(4)和第二微处理器(5);所述电子电路包括串行通信接口电路、多路继电器电路、信号整形电路、高速比较器电路、电压与频率转换电路(2)、串行液晶显示器驱动电路、发光二极管指示灯电路(6)、按键电路(7)、电流传感器(3)、温度传感器(1)以及光纤通信模块;其中,电流传感器(3)为四个,且设有四个通道,温度传感器(1)为六个,且设有六个通道。 Cable intelligent monitoring instrument comprising a microprocessor, connected to the microprocessor and an electronic circuit for data exchange, wherein: said microprocessor is two, are defined as a first microprocessor (4) and a second a microprocessor (5); said electronic circuit comprises a serial communication interface circuit, the multiplexer relay circuit, a signal shaping circuit, the high-speed comparator circuit, voltage and frequency converting circuit (2), a serial liquid crystal display driving circuit, a light emitting diode indicator circuit (6), key circuit (7), a current sensor (3), a temperature sensor (1) and an optical fiber communication module; wherein the current sensor (3) is four, and is provided with four channels, a temperature sensor ( 1) is six, and is provided with six channels.
  2. 2. 根据权利要求1所述的电缆智能监测仪,其特征在于:所述电流传感器(3)形成的电路包括依次相连的感应信号输入电路(31)、电流与电压的阻抗变换电路(32)、电压与频率转换电路(2)、微处理器对频率进行数字编码电路(33)、微处理器驱动光调制器(34)以及光信号进行光纤传输线路(35)。 Cable according to claim 1 of the intelligent monitoring instrument, wherein: said current sensor circuit (3) forming a signal input circuit comprises inductive (31) are sequentially connected, the impedance of the current and voltage conversion circuit (32) , voltage and frequency converting circuit (2), the microprocessor of the digital frequency encoding circuit (33), a microprocessor for driving the optical modulator (34) and the optical signal transmission fiber line (35).
  3. 3. 根据权利要求1所述的电缆智能监测仪,其特征在于:所述温度传感器(1)形成的电路包括依次相连的测量电路(11)、逻辑控制电路(12)、820nm调制光纤接口(13)和供电电源(14)。 Cable according to claim 1 of the intelligent monitoring instrument, wherein: said temperature sensor circuit (1) comprises a measuring circuit is formed (11), a logic control circuit (12) connected in sequence, modulating fiber optic interfaces 820nm ( 13) and power supply (14).
  4. 4. 根据权利要求1所述的电缆智能监测仪,其特征在于:所述第一微处理器(4)和第二微处理器(5)上连接有应急传感器电路(8)。 Cable according to claim 1 of the intelligent monitoring instrument, wherein: the sensor is connected to the emergency circuit (8) of the first microprocessor (4) and a second microprocessor (5).
CN2009201984905U 2009-10-15 2009-10-15 Intelligent cable monitor CN201532416U (en)

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CN102411119A (en) * 2011-11-21 2012-04-11 合肥工业大学 Intelligent monitoring device for temperature and insulation state of 330KV high-voltage cable in hydropower station
CN102411119B (en) * 2011-11-21 2013-09-18 合肥工业大学 Intelligent monitoring device for temperature and insulation state of 330KV high-voltage cable in hydropower station
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CN103698593A (en) * 2013-12-27 2014-04-02 黑龙江大学 Multi-sensor sensing effect display method and display system
CN103995209A (en) * 2014-04-04 2014-08-20 国家电网公司 Detection method for adhesion state of 220kV bundled conductor
CN104237621A (en) * 2014-08-25 2014-12-24 国家电网公司 Integrated monitoring system and monitoring method for high-voltage cable
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