CN102944816B - On-line fault diagnosis and positioning device for mine cable line - Google Patents
On-line fault diagnosis and positioning device for mine cable line Download PDFInfo
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Abstract
本发明公开了一种矿用电缆线路在线故障诊断及定位装，包括电源侧、负荷侧切换开关模块、电源侧电缆定位模块、电源侧、负荷侧智能保护模块；电源侧或负荷侧切换开关模块分别与电源侧电缆连接或负荷侧电缆连接；电源侧或负荷侧智能保护模块分别与电源侧或负荷侧切换开关模块连接；电源侧智能保护模块与负荷侧智能保护模块通讯连接。本发明采用在电源侧和负荷侧设置智能保护模块、测控系统模块和电缆故障定位模块来实现矿用电缆线路上在线故障检测及定位，通过将电缆两端的在线故障定位设备安装于隔爆开关中，自动确定故障相别、故障接地电阻的大小、确定电缆故障位置，结合网络通讯技术，最后将诊断结果上传到地面监控中心。
The invention discloses an on-line fault diagnosis and positioning device for mine cable lines, which includes a switch module on the power supply side and a load side, a cable positioning module on the power supply side, an intelligent protection module on the power supply side and the load side; a switch module on the power supply side or the load side The power supply side or load side intelligent protection module is respectively connected with the power supply side or load side switch module; the power supply side intelligent protection module is connected with the load side intelligent protection module by communication. In the present invention, an intelligent protection module, a measurement and control system module and a cable fault location module are arranged on the power supply side and the load side to realize the online fault detection and location on the mine cable line, and the online fault location devices at both ends of the cable are installed in the explosion-proof switch , automatically determine the fault phase, the size of the fault grounding resistance, determine the location of the cable fault, combined with network communication technology, and finally upload the diagnosis results to the ground monitoring center.
Description
技术领域 technical field
本发明涉及一种电缆故障诊断装置，特别涉及一种适用于煤矿矿井下使用的电缆故障诊断及其定位装置。 The invention relates to a cable fault diagnosis device, in particular to a cable fault diagnosis and positioning device suitable for underground use in coal mines.
背景技术 Background technique
随着我国经济建设的高速发展，电缆在工矿企业、港口、铁路、机场、国防工程及城市供电等部门的应用越来越广泛。而电缆发生故障是不可避免的，因此有效、快速而准确地诊断及预测电力电缆故障，是确保电缆系统可靠安全运行的保证。 With the rapid development of my country's economic construction, cables are more and more widely used in industrial and mining enterprises, ports, railways, airports, national defense projects and urban power supply departments. And cable failure is inevitable, so effective, fast and accurate diagnosis and prediction of power cable failure is the guarantee to ensure the reliable and safe operation of the cable system.
造成电力电缆故障的原因各种各样，煤矿井下采用电缆网络供电，由于煤矿井下的特殊环境，电缆线路是故障率最高的电气设备。长期以来国内外科技工作者做了大量的理论探索和实践尝试，提出了不少有用的方法和技术，其中基于传输线理论的时域脉冲方法由于其诸多优点迄今在世界各国普遍应用。目前尚无适用于煤矿井下的电缆故障定位仪，一般都采用将故障电缆拖到地面进行测试，费时、费力，无法快速定位电缆故障给煤矿生产带来很大影响。 There are various reasons for the failure of power cables. Underground coal mines use cable network power supply. Due to the special environment of underground coal mines, cable lines are the electrical equipment with the highest failure rate. For a long time, scientific and technological workers at home and abroad have done a lot of theoretical exploration and practical attempts, and proposed many useful methods and technologies. Among them, the time-domain pulse method based on transmission line theory has been widely used in countries all over the world due to its many advantages. At present, there is no cable fault locator suitable for underground coal mines. Generally, the faulty cable is dragged to the ground for testing, which is time-consuming and laborious. The inability to quickly locate cable faults has a great impact on coal mine production.
煤矿井下采用电缆网络供电，由于煤矿井下的特殊环境，电缆线路是故障率最高的电气设备。目前尚无适用于煤矿井下的电缆故障定位仪，一般都采用将故障电缆拖到地面进行测试，费时、费力，无法快速定位电缆故障给煤矿生产带来很大影响。 Coal mines use cable network power supply. Due to the special environment of coal mines, cable lines are the electrical equipment with the highest failure rate. At present, there is no cable fault locator suitable for underground coal mines. Generally, the faulty cable is dragged to the ground for testing, which is time-consuming and laborious. The inability to quickly locate cable faults has a great impact on coal mine production.
因此需要一种能快速检测电缆故障并定位电缆故障的装置。 Therefore, there is a need for a device that can quickly detect and locate cable faults.
发明内容 Contents of the invention
有鉴于此，本发明所要解决的技术问题是提供一种能快速检测电缆故障并定位电缆故障的装置。 In view of this, the technical problem to be solved by the present invention is to provide a device that can quickly detect and locate cable faults.
本发明是通过以下技术方案来实现的： The present invention is achieved through the following technical solutions:
本发明提供的矿用电缆线路在线故障诊断及定位装置，包括电源侧模块、负荷侧模块和上位机；所述电源侧模块包括电源侧切换开关模块、电源侧电缆定位模块、电源侧智能保护模块；所述负荷侧模块包括负荷侧切换开关模块、负荷侧智能保护模块；所述电源侧切换开关模块与电源侧电缆连接，所述负荷侧切换开关模块与负荷侧电缆连接；所述电源侧智能保护模块与电源侧切换开关模块连接，所述负荷侧智能保护模块与负荷侧切换开关模块连接；所述电源侧电缆定位模块与电源侧智能保护模块连接；所述电源侧智能保护模块与负荷侧智能保护模块通讯连接，所述上位机用于接收电源侧模块和负荷侧模块检测电缆故障信息，并根据电缆历史数据通过内嵌的专家系统形成电缆故障位置信号，同时显示电缆故障位置信号。 The online fault diagnosis and positioning device for mine cable lines provided by the present invention includes a power supply side module, a load side module and a host computer; the power supply side module includes a power supply side switch module, a power supply side cable positioning module, and a power supply side intelligent protection module The load-side module includes a load-side switching module and a load-side intelligent protection module; the power-side switching module is connected to the power-side cable, and the load-side switching module is connected to the load-side cable; the power-side intelligent The protection module is connected to the switch module on the power supply side, the intelligent protection module on the load side is connected to the switch module on the load side; the cable positioning module on the power supply side is connected to the intelligent protection module on the power supply side; the intelligent protection module on the power supply side is connected to the intelligent protection module on the load side The intelligent protection module is connected by communication, and the upper computer is used to receive the cable fault information detected by the power supply side module and the load side module, and form a cable fault location signal through the embedded expert system according to the cable historical data, and display the cable fault location signal at the same time.
进一步，还包括电源侧后备电池和负荷侧后备电池；所述电源侧后备电池分别与电源侧切换开关模块、电源侧电缆定位模块、电源侧智能保护模块连接；所述负荷侧后备电池分别与负荷侧切换开关模块、负荷侧智能保护模块连接架。 Further, it also includes a backup battery on the power supply side and a backup battery on the load side; the backup battery on the power supply side is connected to the switch module on the power supply side, the cable positioning module on the power supply side, and the intelligent protection module on the power supply side; the backup battery on the load side is connected to the load side respectively. Side transfer switch module, load side intelligent protection module connection frame.
进一步，所述电源侧后备电池和负荷侧后备电池分别为带有数字电位器可调输出电压的直流电源。 Further, the backup battery on the power supply side and the backup battery on the load side are respectively DC power supplies with adjustable output voltages of digital potentiometers.
进一步，所述电源侧智能保护模块包括内嵌专家系统的处理器，所述处理器获得电缆故障位置信息，并通过通讯网络将所有诊断信息送到上位机系统。 Further, the intelligent protection module on the power supply side includes a processor embedded with an expert system, and the processor obtains cable fault location information and sends all diagnostic information to the upper computer system through the communication network.
本发明的有益效果在于：本发明采用在电源侧和负荷侧设置智能保护模块、测控系统模块和电缆故障定位模块来实现矿用电缆线路上在线故障检测及定位，通过将电缆两端的在线故障定位设备安装于隔爆开关中，电缆发生故障时，自动确定故障相别、故障接地电阻的大小、确定电缆故障位置，结合网络通讯技术，最后将诊断结果上传到地面监控中心。 The beneficial effect of the present invention is that: the present invention adopts the intelligent protection module, the measurement and control system module and the cable fault location module on the power supply side and the load side to realize the online fault detection and location on the mine cable line, by locating the online fault at both ends of the cable The equipment is installed in the explosion-proof switch. When the cable fails, it will automatically determine the fault phase, the size of the fault grounding resistance, and the location of the cable fault. Combined with network communication technology, the diagnosis result will be uploaded to the ground monitoring center.
本发明的其他优点、目标和特征在某种程度上将在随后的说明书中进行阐述，并且在某种程度上，基于对下文的考察研究对本领域技术人员而言将是显而易见的，或者可以从本发明的实践中得到教导。本发明的目标和其他优点可以通过下面的说明书和权利要求书来实现和获得。 Other advantages, objects and features of the present invention will be set forth in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the investigation and research below, or can be obtained from It is taught in the practice of the present invention. The objects and other advantages of the invention will be realized and attained by the following description and claims.
附图说明 Description of drawings
为了使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明作进一步的详细描述，其中： In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings, wherein:
图1为本发明实施例提供的矿用电缆线路在线故障诊断及定位装置原理框图。 Fig. 1 is a schematic block diagram of an online fault diagnosis and location device for a mine cable line provided by an embodiment of the present invention.
具体实施方式 detailed description
以下将参照附图，对本发明的优选实施例进行详细的描述。应当理解，优选实施例仅为了说明本发明，而不是为了限制本发明的保护范围。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.
图1为本发明实施例提供的矿用电缆线路在线故障诊断及定位装置原理框图，如图所示：本发明提供的矿用电缆线路在线故障诊断及定位装置，包括电源侧模块、负荷侧模块和上位机；所述电源侧模块包括电源侧切换开关模块、电源侧电缆定位模块、电源侧智能保护模块和电源侧后备电池；所述负荷侧模块包括负荷侧切换开关模块、负荷侧智能保护模块和负荷侧后备电池； Figure 1 is a schematic block diagram of the online fault diagnosis and positioning device for mine cable lines provided by the embodiment of the present invention, as shown in the figure: the online fault diagnosis and positioning device for mine cable lines provided by the present invention includes a power supply side module and a load side module and upper computer; the power side module includes a power side switch module, a power side cable positioning module, a power side intelligent protection module and a power side backup battery; the load side module includes a load side switch module, a load side intelligent protection module and load-side backup battery;
所述电源侧切换开关模块与电源侧电缆连接，所述负荷侧切换开关模块与负荷侧电缆连接；所述电源侧智能保护模块与电源侧切换开关模块连接，所述负荷侧智能保护模块与负荷侧切换开关模块连接；所述电源侧电缆定位模块与电源侧智能保护模块连接；所述电源侧智能保护模块与负荷侧智能保护模块通讯连接。 The power supply side switch module is connected to the power supply side cable, the load side switch module is connected to the load side cable; the power supply side intelligent protection module is connected to the power supply side switch module, and the load side intelligent protection module is connected to the load side The side switch module is connected; the power supply side cable positioning module is connected to the power supply side intelligent protection module; the power supply side intelligent protection module is connected to the load side intelligent protection module by communication.
所述电源侧电缆定位模块，用于确认故障类型和故障电阻大小。 The cable positioning module on the power supply side is used to confirm the type of fault and the magnitude of the fault resistance.
所述智能保护模块，用于提供的故障性质诊断信息。 The intelligent protection module is used to provide diagnosis information of the nature of the fault.
所述智能保护模块，用于对电路线路提供常规保护、测控功能，及电缆两端智能设备的通讯联系。以及根据电缆故障定位的需要，通过智能保护模块发出命令进行相应的继电器开关操作。 The intelligent protection module is used to provide conventional protection, measurement and control functions for the circuit, and communication between intelligent devices at both ends of the cable. And according to the needs of cable fault location, the intelligent protection module issues commands to perform corresponding relay switch operations.
所述电缆故障定位模块，用于在智能保护模块切除故障后，通过电缆故障定位模块施加相应的信号及对信号强度进行调整，通过脉冲法和电桥法联合确定故障位置。 The cable fault location module is used to apply a corresponding signal and adjust the signal strength through the cable fault location module after the fault is removed by the intelligent protection module, and determine the fault location by combining the pulse method and the bridge method.
所述电源侧后备电池分别与电源侧切换开关模块、电源侧电缆定位模块、电源侧智能保护模块连接；所述负荷侧后备电池分别与负荷侧切换开关模块、负荷侧智能保护模块连接架。 The backup battery on the power supply side is connected to the switch module on the power supply side, the cable positioning module on the power supply side, and the intelligent protection module on the power supply side; the backup battery on the load side is connected to the switch module on the load side and the intelligent protection module on the load side.
所述电源侧后备电池和负荷侧后备电池分别为带有数字电位器可调输出电压的直流电源。直流电源的最高输出电压300V、电流10uA、数字电位器可调输出电压。适应负载电阻范围很宽。 The backup battery on the power supply side and the backup battery on the load side are respectively DC power supplies with adjustable output voltages of digital potentiometers. The maximum output voltage of the DC power supply is 300V, the current is 10uA, and the digital potentiometer can adjust the output voltage. Adapt to a wide range of load resistance.
所述电源侧智能保护模块包括内嵌专家系统的处理器，所述处理器获得电缆故障位置信息，并通过通讯网络将所有诊断信息送到上位机系统。所述上位机用于接收电源侧模块和负荷侧模块检测电缆故障信息，并根据电缆历史数据通过内嵌的专家系统形成电缆故障位置信号，同时显示电缆故障位置信号。 The intelligent protection module on the power supply side includes a processor embedded with an expert system, and the processor obtains cable fault location information and sends all diagnostic information to the upper computer system through the communication network. The upper computer is used to receive the cable fault information detected by the power supply side module and the load side module, and form a cable fault location signal through the embedded expert system according to the cable history data, and display the cable fault location signal at the same time.
本实施例提供的矿用电缆线路在线故障诊断及定位装置，工作过程如下： The working process of the online fault diagnosis and positioning device for mine cable lines provided in this embodiment is as follows:
当电缆线路发生(短路、漏电)故障后，电缆电源侧智能保护装置检测到故障，跳开电缆电源侧开关，同时给电缆负荷侧开关的智能保护装置发连跳命令，跳开电缆负荷侧的开关。 When a fault (short circuit, leakage) occurs in the cable line, the intelligent protection device on the power supply side of the cable detects the fault and trips the switch on the power supply side of the cable. switch.
电缆定位模块根据保护模块提供的故障性质诊断信息，通过相应的节点切换，施加直流信号，确认故障类型(短路、漏电、故障相别)和故障(或接地)电阻大小。 According to the diagnostic information of the fault nature provided by the protection module, the cable location module applies a DC signal through the corresponding node switching to confirm the fault type (short circuit, leakage, fault phase difference) and the fault (or grounding) resistance.
根据电缆的大概长度(输入参数)，选用相适应的脉冲电压和健全相别，用脉冲法测出电缆的准确长度。 According to the approximate length of the cable (input parameters), select the appropriate pulse voltage and sound phase, and use the pulse method to measure the exact length of the cable.
根据电缆故障电阻的大小，通过数字电位器调整与故障电阻相适应的脉冲输出电压，采用200MHz的采用频率，通过对采样数据进行分析，得故障点位置。 According to the size of the fault resistance of the cable, adjust the pulse output voltage suitable for the fault resistance through the digital potentiometer, adopt the frequency of 200MHz, and analyze the sampling data to obtain the position of the fault point.
根据电缆故障电阻的大小和故障相别，调节电位器改变直流电压模块的最高输出电压，通过保护模块的高速通讯，控制电缆对端进行相应的故障回线短接操作，通过改进的高精度数字电桥，得到电缆故障位置参数。 According to the size of the cable fault resistance and the fault phase, adjust the potentiometer to change the maximum output voltage of the DC voltage module. Through the high-speed communication of the protection module, the opposite end of the control cable is connected to the corresponding fault loop short circuit operation. Through the improved high-precision digital Bridge to get the cable fault location parameters.
根据电缆的性质、接点电阻的大小、历史数据等，由装置内嵌的专家系统综合给出故障位置参数，并通过通讯网络将所有诊断信息(故障性质、相别、接地电阻，脉冲法及电桥法的电源参数及诊断结果、综合诊断结果)送到上位机系统，同时在就地通过智能保护器的人机交互液晶进行显示，并在就地可以查询全部诊断信息。 According to the nature of the cable, the size of the contact resistance, historical data, etc., the expert system embedded in the device comprehensively gives the fault location parameters, and all the diagnostic information (fault nature, phase difference, grounding resistance, pulse method and electrical The power supply parameters and diagnosis results of the bridge method, and the comprehensive diagnosis results) are sent to the host computer system, and at the same time, it is displayed on the spot through the human-computer interaction LCD of the intelligent protector, and all the diagnostic information can be queried on the spot.
通过人员查找，得到实际故障位置后，在上位系统通过通讯或在就地可以就实际的故障位置参数输入到定位系统的历史数据库中。历史信息可以保存100次的全部故障定位及诊断参数。诊断过程如下： After obtaining the actual fault location through personnel search, the upper system can input the actual fault location parameters into the historical database of the positioning system through communication or on the spot. Historical information can save all fault location and diagnosis parameters for 100 times. The diagnosis process is as follows:
A、当本电缆线路故障时，智能保护器动作跳开电缆两端的开关； A. When the cable line fails, the intelligent protector will jump off the switches at both ends of the cable;
B、调节电桥直流电源，用电桥确定电缆故障性质（短路类型、接地相别等）及短路(或接地)电阻的大概范围； B. Adjust the DC power supply of the bridge, and use the bridge to determine the nature of the cable fault (short circuit type, grounding phase difference, etc.) and the approximate range of short circuit (or grounding) resistance;
C、对于低阻故障，根据电缆的长度和接地电阻的大体范围，调节脉冲源直流电压的大小，用脉冲法测距；对于高阻故障，第一次使用和电缆长度信息缺少时，通过对电缆健全相用脉冲法确定电缆的长度。 C. For low-resistance faults, adjust the DC voltage of the pulse source according to the length of the cable and the general range of grounding resistance, and use the pulse method to measure the distance; for high-resistance faults, when the first use and the cable length information is missing, use the The sound phase of the cable uses the pulse method to determine the length of the cable.
D、对于高阻故障，根据初不诊断的故障电阻大小，确定合适的电桥电源电压大小，用电桥法确定故障位置。 D. For high-resistance faults, determine the appropriate bridge power supply voltage according to the fault resistance that is not initially diagnosed, and use the bridge method to determine the fault location.
E、为了可靠，需要多次测试，对结果数据进行加权作为最终的诊断结果。 E. In order to be reliable, multiple tests are required, and the result data is weighted as the final diagnosis result.
最后说明的是，以上实施例仅用以说明本发明的技术方案而非限制，尽管通过参照本发明的优选实施例已经对本发明进行了描述，但本领域的普通技术人员应当理解，可以在形式上和细节上对其作出各种各样的改变，而不偏离所附权利要求书所限定的本发明的精神和范围。 Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described with reference to the preferred embodiments of the present invention, those skilled in the art should understand that it can be described in the form Various changes may be made in matter and details thereof without departing from the spirit and scope of the invention as defined in the appended claims.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2630859Y (en) * | 2002-11-30 | 2004-08-04 | 张跃武 | Cable measuring intelligent multi-terminal device |
| US6995551B1 (en) * | 2002-06-07 | 2006-02-07 | Marvell International Ltd. | Cable tester with insertion loss estimator |
| CN1827444A (en) * | 2006-03-29 | 2006-09-06 | 西南交通大学 | Railway self-closing/penetrating line fault location device |
| CN101232176A (en) * | 2008-01-09 | 2008-07-30 | 潍坊学院 | Fault location method for non-effectively grounded distribution system based on transient traveling waves |
| CN101452034A (en) * | 2007-11-30 | 2009-06-10 | 上海市电力公司超高压输变电公司 | Portable intelligent DC earthing searching instrument |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6995551B1 (en) * | 2002-06-07 | 2006-02-07 | Marvell International Ltd. | Cable tester with insertion loss estimator |
| US7002354B1 (en) * | 2002-06-07 | 2006-02-21 | Marvell International Ltd. | Cable tester |
| CN2630859Y (en) * | 2002-11-30 | 2004-08-04 | 张跃武 | Cable measuring intelligent multi-terminal device |
| CN1827444A (en) * | 2006-03-29 | 2006-09-06 | 西南交通大学 | Railway self-closing/penetrating line fault location device |
| CN101452034A (en) * | 2007-11-30 | 2009-06-10 | 上海市电力公司超高压输变电公司 | Portable intelligent DC earthing searching instrument |
| CN101232176A (en) * | 2008-01-09 | 2008-07-30 | 潍坊学院 | Fault location method for non-effectively grounded distribution system based on transient traveling waves |
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