CN116435971A - 一种电缆线防止过载着火的方法 - Google Patents

一种电缆线防止过载着火的方法 Download PDF

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CN116435971A
CN116435971A CN202310471272.9A CN202310471272A CN116435971A CN 116435971 A CN116435971 A CN 116435971A CN 202310471272 A CN202310471272 A CN 202310471272A CN 116435971 A CN116435971 A CN 116435971A
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cable
residual current
current
preventing overload
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宋安东
董丹阳
王健
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Hefei Weixin Cnc Technology Co ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00Details of emergency protective circuit arrangements
    • H02H1/0092Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02Details
    • H02H3/05Details with means for increasing reliability, e.g. redundancy arrangements
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/28Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/22Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
    • H02H7/226Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/22Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
    • H02H7/228Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for covered wires or cables
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52Outage or fault management, e.g. fault detection or location

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  • Engineering & Computer Science (AREA)
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  • Evolutionary Computation (AREA)
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  • Emergency Protection Circuit Devices (AREA)

Abstract

本发明公开了一种电缆线防止过载着火的方法,属于电力安全技术领域具体包括:设置剩余电流保护装置,当电缆线传输的电流超过额定值时,由剩余电流保护器自动切断电缆线的电源供给;剩余电流保护装置采用多档次调节,针对不同负载情况下的电流设置有相应的敏感度;本发明通过基于逆时域相量积分算法实现远距离差动保护,能够快速准确地检测与定位故障点,避免故障扩大和影响电网稳定性;可通过软件升级、模型训练等方式不断优化和完善,进一步改进为在复杂条件下的广域环网保护策略,具备对故障的多维度控制和智能判断能力。

Description

一种电缆线防止过载着火的方法
技术领域
本发明涉及电力安全技术领域,具体涉及一种电缆线防止过载着火的方法。
背景技术
在现代社会中,电力供应对人们的生活和工作至关重要。在电力传输和分配过程中,电气设备不可避免地面临一些风险,其中最大的风险之一就是电缆线因过载而引起火灾事故。这些火灾可能导致重大人员伤亡和严重财产损失,因此防止过载成为了一个迫切需要解决的问题。
目前市场上已经有各种形式的防止电缆线过载着火的方法,包括热释放剂、高功率断路器、保险丝等。然而,这些方法都存在着一些缺点。例如,在使用热释放剂时,当超过一个界限温度时,它会自己燃烧并释放出大量能量,促进着火发生。高功率断路器则通常不能够快速响应过载状态,而保险丝的触发时间长,需要等待很长时间甚至无法及时控制电流,使得防止着火效果变差。
因此,需要一种新的技术来防止电缆线因过载而引起火灾事故,从而保障人员生命财产安全。
发明内容
本发明的目的在于提供一种电缆线防止过载着火的方法,解决以下技术问题:
(1)高功率断路器则通常不能够快速响应过载状态,而保险丝的触发时间长,需要等待很长时间甚至无法及时控制电流,使得防止着火效果变差。
本发明的目的可以通过以下技术方案实现:
一种电缆线防止过载着火的方法,包括以下步骤:
设置剩余电流保护装置,当电缆线传输的电流超过额定值时,由剩余电流保护器自动切断电缆线的电源供给;
剩余电流保护装置采用多档次调节,针对不同负载情况下的电流设置有相应的敏感度。
作为本发明进一步的方案:所述剩余电流保护装置采用具有记忆功能的智能电子器件,可实现故障检测及故障信息存储和传输。
作为本发明进一步的方案:剩余电流保护器通过网络连接到监控***,实时反馈电缆线的运行状态、故障信息和预警提示。
作为本发明进一步的方案:网络监控***提供多种故障检测和诊断功能,包括遥测、遥控、自动保护及电力监控报警等。
作为本发明进一步的方案:网络监控***可远程设定电缆线负载容量,并能够实时监测负载工况,从而调整电源输入和输出供应。
作为本发明进一步的方案:剩余电流保护器具有自动复位或手动复位的功能,过载或短路后自动恢复正常供电状态。
作为本发明进一步的方案:电缆线的输入和输出端口采用安全措施,包括保护罩、接地线、绝缘材料。
作为本发明进一步的方案:该剩余电流保护器还包括以下步骤:
步骤一:采集电缆线上游和下游的电流值,并进行数字化处理;
步骤二:将处理后的电流数据通过通讯模块传输到保护装置内部;
步骤三:采用基于逆时域相量积分算法对电流数据进行实时处理;
步骤四:根据处理结果,判断电缆线是否存在故障;
步骤五:当故障发生时,及时触发保护器的动作机构,切断电缆线供电。
作为本发明进一步的方案:其中所述逆时域相量积分算法包括以下步骤:
步骤一:将经过滤波的电流数据变换到dq0坐标系中;
步骤二:在dq0坐标系中计算出负序电流的分量,并进行积分;
步骤三:通过比较正、负序电流的积分值和额定值,判断线路是否存在故障;
步骤四:采用遥控功能实现远程差动保护功能。
作为本发明进一步的方案:所述保护装置内部还集成有集成死区补偿和相位校正。
本发明的有益效果:
1、防火效果良好:采用计算机智能算法判断负载状态,并打开可程控开关主动管控电流,完全避免了热释放剂燃烧、高功率断路器响应慢等问题;
2、响应速度快:该方法对于过载的响应速度仅为毫秒级别,要比现有技术响应速度更快,能够及时地对电力***中出现的危险状况进行干预;
3、技术实现简单:本发明并不需要增加其他特别设备或进行大量的工程改造,而是通过新增的智能算法和装置件以及程序的改进,使得综合成本较低;
4、适用范围广:该方法通过调整可程控开关模块来实现非平衡负载下的电流主动管控,适用于所有电力传输和分配设备中的高压、中压、低压电缆线等不同类型设备。
附图说明
下面结合附图对本发明作进一步的说明。
图1是本发明一种电缆线防止过载着火的方法的流程示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例,都属于本发明保护的范围。
请参阅图1所示,本发明为一种电缆线防止过载着火的方法,包括以下步骤:
设置剩余电流保护装置,当电缆线传输的电流超过额定值时,由剩余电流保护器自动切断电缆线的电源供给;
剩余电流保护装置采用多档次调节,针对不同负载情况下的电流设置有相应的敏感度。
在本发明的一种优选的实施例中,所述剩余电流保护装置采用具有记忆功能的智能电子器件,可实现故障检测及故障信息存储和传输。
在本发明的一种优选的实施例中,剩余电流保护器通过网络连接到监控***,实时反馈电缆线的运行状态、故障信息和预警提示。
在本发明的一种优选的实施例中,网络监控***提供多种故障检测和诊断功能,包括遥测、遥控、自动保护及电力监控报警等。
在本发明的一种优选的实施例中,网络监控***可远程设定电缆线负载容量,并能够实时监测负载工况,从而调整电源输入和输出供应。
在本发明的一种优选的实施例中,剩余电流保护器具有自动复位或手动复位的功能,过载或短路后自动恢复正常供电状态。
在本发明的一种优选的实施例中,电缆线的输入和输出端口采用安全措施,包括保护罩、接地线、绝缘材料。
在本发明的一种优选的实施例中,该剩余电流保护器还包括以下步骤:
步骤一:采集电缆线上游和下游的电流值,并进行数字化处理;
步骤二:将处理后的电流数据通过通讯模块传输到保护装置内部;
步骤三:采用基于逆时域相量积分算法对电流数据进行实时处理;
步骤四:根据处理结果,判断电缆线是否存在故障;
步骤五:当故障发生时,及时触发保护器的动作机构,切断电缆线供电。
在本发明的一种优选的实施例中,其中所述逆时域向量积分算法包括以下步骤:
步骤一:将经过滤波的电流数据变换到dq0坐标系中;
步骤二:在dq0坐标系中计算出负序电流的分量,并进行积分;
步骤三:通过比较正、负序电流的积分值和额定值,判断线路是否存在故障;
步骤四:采用遥控功能实现远程差动保护功能。
在本发明的一种优选的实施例中,所述保护装置内部还集成有集成死区补偿和相位校正。
以上对本发明的一个实施例进行了详细说明,但所述内容仅为本发明的较佳实施例,不能被认为用于限定本发明的实施范围。凡依本发明申请范围所作的均等变化与改进等,均应仍归属于本发明的专利涵盖范围之内。

Claims (10)

1.一种电缆线防止过载着火的方法,其特征在于,包括以下步骤:
设置剩余电流保护装置,当电缆线传输的电流超过额定值时,由剩余电流保护器自动切断电缆线的电源供给;
剩余电流保护装置采用多档次调节,针对不同负载情况下的电流设置有相应的敏感度。
2.根据权利要求1所述的一种电缆线防止过载着火的方法,其特征在于,所述剩余电流保护装置采用具有记忆功能的智能电子器件,可实现故障检测及故障信息存储和传输。
3.根据权利要求2所述的一种电缆线防止过载着火的方法,其特征在于,剩余电流保护器通过网络连接到监控***,实时反馈电缆线的运行状态、故障信息和预警提示。
4.根据权利要求3所述的一种电缆线防止过载着火的方法,其特征在于,网络监控***提供多种故障检测和诊断功能,包括遥测、遥控、自动保护及电力监控报警等。
5.根据权利要求4所述的一种电缆线防止过载着火的方法,其特征在于,网络监控***可远程设定电缆线负载容量,并能够实时监测负载工况,从而调整电源输入和输出供应。
6.根据权利要求1所述的一种电缆线防止过载着火的方法,其特征在于,剩余电流保护器具有自动复位或手动复位的功能,过载或短路后自动恢复正常供电状态。
7.根据权利要求1所述的一种电缆线防止过载着火的方法,其特征在于,电缆线的输入和输出端口采用安全措施,包括保护罩、接地线、绝缘材料。
8.根据权利要求1所述的一种电缆线防止过载着火的方法,其特征在于,该剩余电流保护器还包括以下步骤:
步骤一:采集电缆线上游和下游的电流值,并进行数字化处理;
步骤二:将处理后的电流数据通过通讯模块传输到保护装置内部;
步骤三:采用基于逆时域相量积分算法对电流数据进行实时处理;
步骤四:根据处理结果,判断电缆线是否存在故障;
步骤五:当故障发生时,及时触发保护器的动作机构,切断电缆线供电。
9.根据权利要求8所述的一种电缆线防止过载着火的方法,其特征在于,其中所述逆时域相量积分算法包括以下步骤:
步骤一:将经过滤波的电流数据变换到dq0坐标系中;
步骤二:在dq0坐标系中计算出负序电流的分量,并进行积分;
步骤三:通过比较正、负序电流的积分值和额定值,判断线路是否存在故障;
步骤四:采用遥控功能实现远程差动保护功能。
10.根据权利要求1所述的一种电缆线防止过载着火的方法,其特征在于,所述保护装置内部还集成有集成死区补偿和相位校正。
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