CN204595144U - A kind of distribution line failure on-line monitoring system - Google Patents
A kind of distribution line failure on-line monitoring system Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
本实用新型属于配电线路技术领域，尤其涉及一种配电线路故障在线监测系统，包括主控单元、故障监测单元、放大单元、无线射频单元，所述故障检测单元连接放大单元，所述放大单元连接主控单元，所述主控单元连接无线射频单元。本实用新型的电流互感器可以快速准确的在线检测接地故障、短路故障、线路负荷、谐波等情况，并将所采集到的特征信号通过天线发射给系统主站进行处理，实现远距离传输，整个过程无需人工检测，就可以实时监测配电线路故障的情况，对于野外、距离远、环境复杂的地方也可以实现实时监测，快速定位故障点，便于线路检修人员有针对的维修，大大提高工作人员的工作效率，减少人员劳动强度，减少人力成本。
The utility model belongs to the technical field of power distribution lines, in particular to an online fault monitoring system for power distribution lines, which includes a main control unit, a fault monitoring unit, an amplification unit, and a wireless radio frequency unit. The fault detection unit is connected to the amplification unit, and the amplification unit The unit is connected to the main control unit, and the main control unit is connected to the wireless radio frequency unit. The current transformer of the utility model can quickly and accurately detect grounding faults, short circuit faults, line loads, harmonics, etc. online, and transmit the collected characteristic signals to the main station of the system for processing through the antenna to realize long-distance transmission. The whole process does not require manual detection, and real-time monitoring of distribution line faults can be realized. Real-time monitoring can also be realized in places with long distances and complex environments, and the fault point can be quickly located, which is convenient for line maintenance personnel to perform targeted maintenance and greatly improves work. Improve the work efficiency of personnel, reduce the labor intensity of personnel, and reduce labor costs.
Description
技术领域technical field
本实用新型属于配电线路技术领域，尤其涉及一种配电线路故障在线监测系统。The utility model belongs to the technical field of power distribution lines, in particular to an online fault monitoring system for power distribution lines.
背景技术Background technique
电力系统是国民经济的基础产业，随着经济的发展，电力系统的规模不断扩大，人们对供电服务、电能质量的要求越来越高。为此我国提出了建设智能电网的总体目标，智能电网由智能输电网和智能配电网组成，十二五规划对智能配电网提出了安全可靠、优质高效、灵活互动的三大目标，其核心内容之一是使配电网具有更高的供电可靠性，具有自愈(重构)功能，最大限度减少供电故障对用户的影响。国家电网和南方电网招标花在配电网上的产品超百亿元。这其中架空线路配电网智能化产品占有相当大的比例。然而，目前的故障监测方式是检修人员人工监测，由于一些架空线路在野外，距离远，环境复杂，产生故障(短路和接地)难于迅速定位故障点，给线路检修人员带来较大困难，导致工作人员的工作效率低、人员劳动强度大。The power system is the basic industry of the national economy. With the development of the economy, the scale of the power system continues to expand, and people's requirements for power supply services and power quality are getting higher and higher. For this reason, my country has put forward the overall goal of building a smart grid. The smart grid is composed of a smart transmission network and a smart distribution network. One of the core contents is to make the distribution network have higher power supply reliability, have a self-healing (reconfiguration) function, and minimize the impact of power supply failures on users. State Grid and China Southern Power Grid have spent more than 10 billion yuan on products on the distribution network through bidding. Among them, the intelligent products of overhead line distribution network occupy a considerable proportion. However, the current fault monitoring method is manual monitoring by maintenance personnel. Since some overhead lines are in the field, the distance is long, and the environment is complex, it is difficult to quickly locate the fault point when a fault occurs (short circuit and grounding), which brings great difficulties to line maintenance personnel. The working efficiency of the staff is low, and the labor intensity of the staff is high.
实用新型内容Utility model content
本实用新型提供一种配电线路故障在线监测系统，以解决上述背景技术中目前的故障监测方式是检修人员人工监测，工作效率低、人员劳动强度大的问题。The utility model provides an on-line fault monitoring system for power distribution lines to solve the problems in the above-mentioned background technology that the current fault monitoring method is manual monitoring by maintenance personnel, low work efficiency and high labor intensity.
本实用新型所解决的技术问题采用以下技术方案来实现：本实用新型提供一种配电线路故障在线监测系统，其特征在于：包括主控单元、故障监测单元、放大单元、无线射频单元，所述故障检测单元连接放大单元，所述放大单元连接主控单元，所述主控单元连接无线射频单元。The technical problems solved by the utility model are realized by the following technical solutions: the utility model provides an online fault monitoring system for power distribution lines, which is characterized in that it includes a main control unit, a fault monitoring unit, an amplification unit, and a wireless radio frequency unit. The fault detection unit is connected to the amplifying unit, the amplifying unit is connected to the main control unit, and the main control unit is connected to the wireless radio frequency unit.
所述主控单元包括芯片U1、接收器J2，所述芯片U1的引脚4接接收器J2的引脚3，其引脚5接接收器J2的引脚2，其引脚6接接收器J2的引脚1，其引脚19接地。The main control unit includes a chip U1 and a receiver J2, the pin 4 of the chip U1 is connected to the pin 3 of the receiver J2, its pin 5 is connected to the pin 2 of the receiver J2, and its pin 6 is connected to the receiver Pin 1 of J2, its pin 19 is grounded.
所述芯片U1选用AT89C52型号的单片机。The chip U1 is an AT89C52 microcontroller.
所述故障监测单元包括串行电流互感器J1、光电耦合器U2、三极管Q1，所述串行电流互感器J1的引脚1接地，其引脚2接三极管Q1的基极，其引脚3接光电耦合器U2的引脚2，其引脚4接电压+12V，所述光电耦合器U2的引脚1接三极管Q1的集电极且都接电压+12V，其引脚3接三极管Q1的发射极。The fault monitoring unit includes a serial current transformer J1, a photocoupler U2, and a triode Q1. The pin 1 of the serial current transformer J1 is grounded, and its pin 2 is connected to the base of the triode Q1, and its pin 3 is grounded. Connect to pin 2 of photocoupler U2, and its pin 4 is connected to voltage +12V. emitter.
所述放大单元包括放大器U3、电阻R1、电阻R2、电阻R3、电阻R4、电容C1、电容C2，所述放大器U3的引脚1接电阻R3的一端、电容C1的一端且都接芯片U1的引脚11，其引脚2接电阻R1的一端、电阻R2的一端，其引脚3接电阻R4的一端、电容C2的一端，所述电阻R2的另一端接电阻R3的另一端、电容C1的另一端，所述电阻R4的另一端接电容C2的另一端且都接地，所述电阻R1的另一端接光电耦合器U2的引脚4。The amplifying unit includes an amplifier U3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, and a capacitor C2. The pin 1 of the amplifier U3 is connected to one end of the resistor R3 and one end of the capacitor C1 and is connected to the chip U1. Pin 11, its pin 2 is connected to one end of resistor R1, one end of resistor R2, its pin 3 is connected to one end of resistor R4, one end of capacitor C2, the other end of the resistor R2 is connected to the other end of resistor R3, capacitor C1 The other end of the resistor R4 is connected to the other end of the capacitor C2 and both are grounded, and the other end of the resistor R1 is connected to the pin 4 of the optocoupler U2.
所述放大器U3选用运算放大器。The amplifier U3 is an operational amplifier.
所述无线射频单元包括稳压管D1、电阻R5、三极管Q2、电容C3、天线E1，所述稳压管D1的阴极接三极管Q2的基极、电阻R5的一端且都接芯片U1的引脚25,所述三极管Q2的集电极接电容C3的一端，其发射极接稳压管D1的阳极且都接地，所述电容C3的另一端接电阻R5的另一端且接天线E1。The wireless radio frequency unit includes a voltage regulator tube D1, a resistor R5, a transistor Q2, a capacitor C3, and an antenna E1. The cathode of the voltage regulator tube D1 is connected to the base of the transistor Q2, and one end of the resistor R5 is connected to the pin of the chip U1. 25. The collector of the triode Q2 is connected to one end of the capacitor C3, the emitter thereof is connected to the anode of the regulator tube D1 and both are grounded, and the other end of the capacitor C3 is connected to the other end of the resistor R5 and to the antenna E1.
所述三极管Q2选用NPN型晶体三极管。The transistor Q2 is an NPN crystal transistor.
本实用新型的有益效果为：The beneficial effects of the utility model are:
1本实用新型的电流互感器J1检测配电线路的检测点两侧的电压、电流信号，经过光电耦合器U2隔离以后，在经过放大单元放大，转换成电压信号传送至单片机，再由单片机将采集到的信号由天线将信号无线传输出去，实现远距离传输，整个过程无需人工检测，就可以实时监测配电线路故障的情况，对于野外、距离远、环境复杂的地方也可以实现实时监测，快速定位故障点，便于线路检修人员有针对的维修，大大提高工作人员的工作效率，减少人员劳动强度，减少人力成本。1 The current transformer J1 of the utility model detects the voltage and current signals on both sides of the detection point of the power distribution line. After being isolated by the photocoupler U2, it is amplified by the amplification unit, converted into a voltage signal and sent to the single-chip microcomputer, and then the single-chip microcomputer The collected signal is transmitted wirelessly by the antenna to achieve long-distance transmission. The whole process does not require manual detection, and the fault situation of the power distribution line can be monitored in real time. Real-time monitoring can also be realized in the field, in places with long distances and complex environments. Quickly locate the fault point, which is convenient for line maintenance personnel to perform targeted maintenance, greatly improves the work efficiency of the staff, reduces the labor intensity of the personnel, and reduces the labor cost.
2本实用新型通过光电耦合器来将电流互感器检测到的调制信号耦合至电力电缆屏蔽层，避免信号受外界干扰，导致检测信号不准确的情况发生。2. The utility model couples the modulated signal detected by the current transformer to the shielding layer of the power cable through a photoelectric coupler, so as to prevent the signal from being interfered by the outside world, resulting in inaccurate detection signals.
3本实用新型的电流互感器可以快速准确的在线检测接地故障、短路故障、线路负荷、谐波等情况，并将所采集到的特征信号通过天线发射给系统主站进行处理，能够有效提高配电线路故障检测的自动化和现代水平。3 The current transformer of the utility model can quickly and accurately detect grounding faults, short circuit faults, line loads, harmonics, etc. online, and transmit the collected characteristic signals to the system master station for processing through the antenna, which can effectively improve the distribution efficiency. Automated and modern level of fault detection on electrical lines.
4本实用新型的接收器，可以接收来自系统主站的对时命令实现远程受控信号采集、处理、传输功能。4. The receiver of the utility model can receive the timing command from the main station of the system to realize the functions of remote controlled signal collection, processing and transmission.
5本实用新型结构简单，各元器件相对比较便宜，制造成本低，易集成化，可以大范围推广使用。5. The utility model has simple structure, relatively cheap components, low manufacturing cost, easy integration, and can be popularized and used in a wide range.
附图说明Description of drawings
图1是本实用新型的结构图；Fig. 1 is a structural diagram of the utility model;
图2是本实用新型的主控单元的电路原理图；Fig. 2 is the circuit schematic diagram of the master control unit of the present utility model;
图3是本实用新型的故障监测单元的电路原理图；Fig. 3 is the circuit schematic diagram of the fault monitoring unit of the present utility model;
图4是本实用新型的放大单元的电路原理图；Fig. 4 is the circuit schematic diagram of the amplifying unit of the present utility model;
图5是本实用新型的无线射频单元的电路原理图。Fig. 5 is a schematic circuit diagram of the wireless radio frequency unit of the present invention.
具体实施方式Detailed ways
以下结合附图对本实用新型做进一步描述：Below in conjunction with accompanying drawing, the utility model is further described:
实施例：Example:
本实施例包括：主控单元、故障监测单元、放大单元、无线射频单元。This embodiment includes: a main control unit, a fault monitoring unit, an amplification unit, and a wireless radio frequency unit.
图1中，故障检测单元连接放大单元，放大单元连接主控单元，主控单元连接无线射频单元。In Fig. 1, the fault detection unit is connected to the amplifying unit, the amplifying unit is connected to the main control unit, and the main control unit is connected to the wireless radio frequency unit.
图2中，主控单元包括芯片U1、接收器J2，芯片U1的引脚4接接收器J2的引脚3，其引脚5接接收器J2的引脚2，其引脚6接接收器J2的引脚1，其引脚19接地。In Figure 2, the main control unit includes a chip U1 and a receiver J2, the pin 4 of the chip U1 is connected to the pin 3 of the receiver J2, the pin 5 is connected to the pin 2 of the receiver J2, and the pin 6 is connected to the receiver Pin 1 of J2, its pin 19 is grounded.
图3中，故障监测单元包括串行电流互感器J1、光电耦合器U2、三极管Q1，串行电流互感器J1的引脚1接地，其引脚2接三极管Q1的基极，其引脚3接光电耦合器U2的引脚2，其引脚4接电压+12V，光电耦合器U2的引脚1接三极管Q1的集电极且都接电压+12V，其引脚3接三极管Q1的发射极。In Figure 3, the fault monitoring unit includes a serial current transformer J1, a photocoupler U2, and a triode Q1. The pin 1 of the serial current transformer J1 is grounded, its pin 2 is connected to the base of the triode Q1, and its pin 3 Connect to pin 2 of optocoupler U2, its pin 4 to voltage +12V, pin 1 of optocoupler U2 to the collector of transistor Q1 and both connected to voltage +12V, its pin 3 to the emitter of transistor Q1 .
图4中，放大单元包括放大器U3、电阻R1、电阻R2、电阻R3、电阻R4、电容C1、电容C2，放大器U3的引脚1接电阻R3的一端、电容C1的一端且都接芯片U1的引脚11，其引脚2接电阻R1的一端、电阻R2的一端，其引脚3接电阻R4的一端、电容C2的一端，电阻R2的另一端接电阻R3的另一端、电容C1的另一端，电阻R4的另一端接电容C2的另一端且都接地，电阻R1的另一端接光电耦合器U2的引脚4。In Figure 4, the amplifying unit includes amplifier U3, resistor R1, resistor R2, resistor R3, resistor R4, capacitor C1, and capacitor C2. Pin 1 of amplifier U3 is connected to one end of resistor R3, one end of capacitor C1 and both are connected to chip U1. Pin 11, its pin 2 is connected to one end of resistor R1, one end of resistor R2, its pin 3 is connected to one end of resistor R4, one end of capacitor C2, the other end of resistor R2 is connected to the other end of resistor R3, and the other end of capacitor C1 One end, the other end of the resistor R4 is connected to the other end of the capacitor C2 and both are grounded, and the other end of the resistor R1 is connected to the pin 4 of the optocoupler U2.
图5中，无线射频单元包括稳压管D1、电阻R5、三极管Q2、电容C3、天线E1，稳压管D1的阴极接三极管Q2的基极、电阻R5的一端且都接芯片U1的引脚25,三极管Q2的集电极接电容C3的一端，其发射极接稳压管D1的阳极且都接地，电容C3的另一端接电阻R5的另一端且接天线E1。In Figure 5, the wireless radio frequency unit includes a voltage regulator D1, a resistor R5, a transistor Q2, a capacitor C3, and an antenna E1. The cathode of the voltage regulator D1 is connected to the base of the transistor Q2, and one end of the resistor R5 is connected to the pin of the chip U1. 25. The collector of the triode Q2 is connected to one end of the capacitor C3, the emitter is connected to the anode of the regulator D1 and both are grounded, and the other end of the capacitor C3 is connected to the other end of the resistor R5 and connected to the antenna E1.
本实用新型的电流互感器J1检测配电线路的检测点两侧的电压、电流信号，经过光电耦合器U2隔离以后，在经过放大单元放大，转换成电压信号传送至单片机，再由单片机将采集到的信号由天线将信号无线传输出去，实现远距离传输，整个过程无需人工检测，就可以实时监测配电线路故障的情况，对于野外、距离远、环境复杂的地方也可以实现实时监测，快速定位故障点，便于线路检修人员有针对的维修，大大提高工作人员的工作效率，减少人员劳动强度，减少人力成本。The current transformer J1 of the utility model detects the voltage and current signals on both sides of the detection point of the power distribution line. After being isolated by the photoelectric coupler U2, it is amplified by the amplification unit, converted into a voltage signal and sent to the single-chip microcomputer, and then the single-chip microcomputer collects The received signal is transmitted wirelessly by the antenna to achieve long-distance transmission. The whole process does not require manual detection, and the fault situation of the power distribution line can be monitored in real time. Real-time monitoring can also be realized for places with long distances and complex environments in the field, and fast Locating the fault point facilitates the targeted maintenance of the line maintenance personnel, greatly improves the work efficiency of the staff, reduces the labor intensity of the staff, and reduces the labor cost.
本实用新型的电流互感器可以快速准确的在线检测接地故障、短路故障、线路负荷、谐波等情况，并将所采集到的特征信号通过天线发射给系统主站进行处理，引导工作人员迅速准确的找到故障点，提高工作效率，减轻工作人员的劳动强度，有效提高配电线路故障检测的自动化和现代水平。The current transformer of the utility model can quickly and accurately detect grounding faults, short circuit faults, line loads, harmonics and other conditions online, and transmit the collected characteristic signals to the system master station for processing through the antenna, and guide the staff to quickly and accurately Find the point of failure, improve work efficiency, reduce the labor intensity of the staff, and effectively improve the automation and modern level of distribution line fault detection.
本实用新型当架空线路发生故障时，电流互感器检测到线路故障以后，通过天线无线射频方式，将故障信号上传到数据通讯终端；准实时在线的数据通讯终端通过无线网络将故障信号发送给监控中心，监控中心的工作人员将该故障的相关信息传达给指定的管理人员，确保在线路运行正常的情况下，配电线路故障在线监测系统定时采集电网运行的数据，通过无线射频方式实时上传至监控中心。In the utility model, when the overhead line fails, after the current transformer detects the line fault, the fault signal is uploaded to the data communication terminal through the wireless radio frequency of the antenna; the quasi-real-time online data communication terminal sends the fault signal to the monitor through the wireless network Center, the staff of the monitoring center convey the relevant information of the fault to the designated management personnel, to ensure that the distribution line fault online monitoring system regularly collects the data of the power grid operation under the condition of normal operation of the line, and uploads it to the monitoring Center.
利用本实用新型所述的技术方案，或本领域的技术人员在本实用新型技术方案的启发下，设计出类似的技术方案，而达到上述技术效果的，均是落入本实用新型的保护范围。Utilize the technical solution described in the utility model, or those skilled in the art design similar technical solutions under the inspiration of the technical solution of the utility model, and achieve the above-mentioned technical effect, all fall into the protection scope of the utility model .
Claims (8)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104678256A (en) * | 2015-01-29 | 2015-06-03 | 杭州申昊科技股份有限公司 | On-line monitoring system for power distribution line fault |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104678256A (en) * | 2015-01-29 | 2015-06-03 | 杭州申昊科技股份有限公司 | On-line monitoring system for power distribution line fault |
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