CN114552771A - 一种配电网故障自动定位隔离开关控制系统和控制方法 - Google Patents

一种配电网故障自动定位隔离开关控制系统和控制方法 Download PDF

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CN114552771A
CN114552771A CN202111654440.5A CN202111654440A CN114552771A CN 114552771 A CN114552771 A CN 114552771A CN 202111654440 A CN202111654440 A CN 202111654440A CN 114552771 A CN114552771 A CN 114552771A
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intelligent switch
distribution network
data processor
voltage
power distribution
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刘丰文
沈海天
余茜
斯楚婷
卫彬
谢晓峰
王宇超
包永珂
盛子建
楼泽兵
张亚羽
张余锋
俞诗航
杨喆
张正平
张海波
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Zhejiang Huayun Electric Power Engineering Design Consulting Co
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Zhejiang Huayun Electric Power Engineering Design Consulting Co
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit 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
    • H02J13/00001—Circuit 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]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency 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
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
    • H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency 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
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
    • H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit 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
    • H02J13/00006—Circuit 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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00022—Circuit 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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit 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
    • H02J13/00006—Circuit 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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00028—Circuit 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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit 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
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
    • H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS 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
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52—Outage or fault management, e.g. fault detection or location

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

本发明公开了一种配电网故障自动定位隔离开关控制系统，包括智能开关本体，与智能开关电连接的电压电流互感器、智能开关控制器、数据处理器和电源模块，智能开关本体和电压电流互感器安装在配电网各个节点，智能开关控制器设置在各个配电网区段的两侧；所述电源模块：给隔离开关控制系统供电，所述数据处理器：接收存储并上传智能开关控制器、电压电流互感器和数据处理器传送的数据，所述智能开关控制器：接受处理电压电流互感器采集的电路数据，根据预设逻辑定位故障，将处理后的电路数据传输给数据处理器，并控制故障对应的智能开关的开启或关闭。系统线路发生故障时，线路上紧临故障区段的开关能够做出准确响应，可大幅提高配电网供电可靠性。

Description

一种配电网故障自动定位隔离开关控制系统和控制方法
技术领域
本发明涉及紧急电路保护领域，尤其涉及一种配电网故障自动定位隔离开关控制系统和控制方法。
背景技术
随着国民生产的发展与人民对生活质量需求的变化，对电力系统可靠运行的要求也随之增长，电力系统供电的稳定将直接影响社会安全。故障的出现不可完全避免，那么如何在故障发生后快速排除故障就成为了一个研究的重点问题。目前，电力系统依据中性点接地方式
不同可分小电流接地系统（不直接接地）和大电流接地系统（直接接地）两种。我国的现状是当配电网在 110KV 以上时，主要考虑的是绝缘问题，故广泛使用大电流接地系统。66KV及以下配电网为了保证给用户持续供电而大多使用小电流接地系统。小电流接地系统又分为三类，分别为中性点不接地系统（NUGS）、中性点经电阻接地系统（NRS）、中性点经消弧线圈接地系统（NES）。
经统计结果显示，配电设备出现故障后致使停电的概率达到 95%以上，其中单相接地故障占比 80%以上。小电流接地系统发生单相接地故障后，因为没有有效连接构成短路回路，三相线电压仍对称，所以电流信号非常小，不会影响负载运行。因此可以允许在故障后带电
运行 1～2 个小时，不需要断电，可利用这段时间迅速排查故障保证用户端不断电，提高供电持续性和可靠性。但由于故障相电压变零，非故障相电压升高，长期处于过电压的状态运行可能会导致设备绝缘薄弱环节被击穿或升级为多相故障损坏设备，甚至可能引起电力线缆爆炸。因此，在单相接地故障发生后的快速选线是非常必要的，对提高配电网稳定性有重大意义。
发明内容
本发明是为了克服现有技术的配电网故障发生时难以快速选线的问题，提供一种较为可靠的配电网故障自动定位隔离开关控制系统和控制方法，使得配电网区段在发生故障时，线路上紧临故障区段的开关能够做出准确响应，可大幅提高配电网供电可靠性。
为实现上述目的，本发明采用以下技术方案：
一种配电网故障自动定位隔离开关控制系统，包括智能开关本体，还包括与智能开关电连接的电压电流互感器、智能开关控制器、数据处理器和电源模块，所述智能开关本体和电压电流互感器安装在配电网各个节点，所述智能开关控制器设置在各个配电网区段的两侧；
所述电源模块：给隔离开关控制系统供电，
所述数据处理器：与智能开关控制器、电压电流互感器和数据处理器通信连接，接收存储并上传智能开关控制器、电压电流互感器和数据处理器传送的数据，
所述智能开关控制器：接受处理电压电流互感器采集的电路数据，根据预设逻辑定位故障，将处理后的电路数据传输给数据处理器，并控制故障对应的智能开关的开启或关闭。
隔离开关控制系统各个部分电路与地之间的绝缘电阻不小于100MΩ，所述智能开关控制器采集三相电流、三相电压及开关实时状态，同时采集或合成零序电流、零序电压；根据控制芯片的预设逻辑定位故障，将处理后的电路数据传输给数据处理器，定位故障区段，控制线路上紧临故障区段的开关能够做出准确响应，可大幅提高配电网供电可靠性。
作为优选，所述数据处理器包括数据处理单元、显示输出单元和通信单元，所述显示输出单元、通信单元和数据数据处理单元连接，所述显示输出单元为LCD显示屏。LCD显示屏显示配电网各个区段的电路采集数据，通信单元通信方式采用 GPRS、CDMA ，支持省公司专网 SIM 卡，可支持 4G 功能，可使用 4GSIM卡。支持 IEC61850，IEC103，MODBUS 协议上传数据。
作为优选，所述电源模块还包括太阳能板，所述太阳能板表面依次设有防水层和防尘层。防止太阳能板长期处于雨水或者高湿环境时，由于雨水渗透进太阳能板而造成短路，提高太阳能板的使用寿命。
作为优选，所述太阳能板一侧设有刮尘装置，所述刮尘装置包括刮尘条，所述刮尘条一端与太阳能板一端角通过旋转驱动结构连接，所述太阳能板一端角的两边设有止动条，所述旋转驱动结构与智能开关控制器电连接。控制器控制旋转驱动结构动作，带动刮尘条沿太阳能板表面刮擦，配合太阳能板表面的防尘层减少太阳能板表面附着的灰尘及杂物，从而提高光电转换效率，提高太阳能板的使用寿命。
作为优选，所述电压电流互感器包括采用阻容分压式的电压互感器和采用LPCT低功耗线圈的电流互感器。阻容分压式的电压互感器无铁芯、精度高、成本较传统 TV 低、受环境影响小、低功耗、体积小、重量轻、绝缘性能好；LPCT低功耗线圈的电流互感器带铁芯、精度高、频带范围宽、低功耗、受环境影响小。
一种配电网故障自动定位隔离开关控制方法，采用本发明所述的一种配电网故障自动定位隔离开关控制系统。
作为优选，包括每半周波计算一次电流基波有效值，若电流基波有效值大于预设第一保护定值，则启动故障确认延时，延时到达后触发继电器进行分合闸动作；若延时过程中基波有效值符合预设保护定值，则继电器动作保持。
作为优选，包括每半周波计算一次电流基波有效值，如果电流基波大于第二保护定值时，检查二次谐波分量的值；如果二次谐波分量与基波分量值之比大于设定比例，则智能开启定时闭锁保护；定时时间到后，则智能开关复位；如果在闭锁时间内，二次谐波分量回归到第二保护定值内，则智能开关复位。
作为优选，还包括当配电网中的某个节点电流超过第三保护定值或者该节点的零序电压或者零序电流超过设定阈值时，记录一段时间内的波形数据与开关位置并上传到数据处理器。录波点数为不少于200 点每周波。
因此，本发明具有如下有益效果：本发明提供一种较为可靠配电网故障自动定位隔离开关控制方法和与之相结合的配电网隔离开关控制系统，使得系统线路发生故障时，线路上紧临故障区段的开关能够做出准确响应，可大幅提高配电网供电可靠性。
附图说明
图1是本发明一实施例配电网故障自动定位隔离开关控制系统框图。
图2是本发明一实施例配电网故障自动定位隔离开关控制系统的太阳能板结构示意图。
图中：1、太阳能板 2、刮尘条 3、止动条 4、旋转驱动结构。
具体实施方式
下面结合附图与具体实施方式对本发明做进一步的描述。
实施例：
如图1所示的一种配电网故障自动定位隔离开关控制系统，
与智能开关电连接的电压电流互感器、智能开关控制器、数据处理器和电源模块，所述智能开关本体和电压电流互感器安装在配电网各个节点，所述智能开关控制器设置在各个配电网区段的两侧；电压电流互感器包括采用阻容分压式的电压互感器和采用LPCT低功耗线圈的电流互感器。阻容分压式的电压互感器无铁芯、精度高、成本较传统 TV 低、受环境影响小、低功耗、体积小、重量轻、绝缘性能好；LPCT低功耗线圈的电流互感器带铁芯、精度高、频带范围宽、低功耗、受环境影响小。
所述电源模块：给隔离开关控制系统供电，电源模块还包括太阳能板1，所述太阳能板1表面依次设有防水层和防尘层。防止太阳能板1长期处于雨水或者高湿环境时，由于雨水渗透进太阳能板1而造成短路，提高太阳能板1的使用寿命。太阳能板1一侧设有刮尘装置，所述刮尘装置包括刮尘条2，所述刮尘条2一端与太阳能板1一端角通过旋转驱动结构4连接，所述太阳能板1一端角的两边设有止动条3，所述旋转驱动结构4与智能开关控制器电连接。控制器控制旋转驱动结构4动作，带动刮尘条2沿太阳能板1表面刮擦，配合太阳能板1表面的防尘层减少太阳能板1表面附着的灰尘及杂物，从而提高光电转换效率。
所述数据处理器：与智能开关控制器、电压电流互感器和数据处理器通信连接，接收存储并上传智能开关控制器、电压电流互感器和数据处理器传送的数据，数据处理器包括数据处理单元、显示输出单元和通信单元，所述显示输出单元、通信单元和数据数据处理单元连接，所述显示输出单元为LCD显示屏。LCD显示屏显示配电网各个区段的电路采集数据，通信单元通信方式采用 GPRS、CDMA ，支持省公司专网 SIM 卡，可支持 4G 功能，可使用 4GSIM卡。支持 IEC61850，IEC103，MODBUS 协议上传数据。
所述智能开关控制器：接受处理电压电流互感器采集的电路数据，根据预设逻辑定位故障，将处理后的电路数据传输给数据处理器，并控制故障对应的智能开关的开启或关闭。
隔离开关控制系统各个部分电路与地之间的绝缘电阻不小于100MΩ，所述智能开关控制器采集三相电流、三相电压及开关实时状态，同时采集或合成零序电流、零序电压；根据控制芯片的预设逻辑定位故障，将处理后的电路数据传输给数据处理器，定位故障区段，控制线路上紧临故障区段的开关能够做出准确响应，可大幅提高配电网供电可靠性。
本发明还公开了一种配电网故障自动定位隔离开关控制方法，包括每半周波计算一次电流基波有效值，若电流基波有效值大于预设第一保护定值，则启动故障确认延时，延时到达后触发继电器进行分合闸动作；若延时过程中基波有效值符合预设保护定值，则继电器动作保持。
包括每半周波计算一次电流基波有效值，如果电流基波大于第二保护定值时，检查二次谐波分量的值；如果二次谐波分量与基波分量值之比大于设定比例，则智能开启定时闭锁保护；定时时间到后，则智能开关复位；如果在闭锁时间内，二次谐波分量回归到第二保护定值内，则智能开关复位。
当配电网中的某个节点电流超过第三保护定值或者该节点的零序电压或者零序电流超过设定阈值时，记录一段时间内的波形数据与开关位置并上传到数据处理器。录波点数为不少于200 点每周波。将每次故障录波数据上传至主站并保存，便于工作人员进行数据远程调阅。
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。
尽管本文较多地使用了电压电流互感器、智能开关本体、谐波、周波、电流基波等术语，但并不排除使用其它术语的可能性。使用这些术语仅仅是为了更方便地描述和解释本发明的本质；把它们解释成任何一种附加的限制都是与本发明精神相违背的。

Claims (9)

1.一种配电网故障自动定位隔离开关控制系统，包括智能开关本体，其特征是，还包括与智能开关电连接的电压电流互感器、智能开关控制器、数据处理器和电源模块，所述智能开关本体和电压电流互感器安装在配电网各个节点，所述智能开关控制器设置在各个配电网区段的两侧；
所述电源模块：给隔离开关控制系统供电，
所述数据处理器：与智能开关控制器、电压电流互感器和数据处理器通信连接，接收存储并上传智能开关控制器、电压电流互感器和数据处理器传送的数据，
所述智能开关控制器：接受处理电压电流互感器采集的电路数据，根据预设逻辑定位故障，将处理后的电路数据传输给数据处理器，并控制故障对应的智能开关的开启或关闭。
2.根据权利要求1所述的一种配电网故障自动定位隔离开关控制系统，其特征是，所述数据处理器包括数据处理单元、显示输出单元和通信单元，所述显示输出单元、通信单元和数据数据处理单元连接，所述显示输出单元为LCD显示屏。
3.根据权利要求2所述的一种配电网故障自动定位隔离开关控制系统，其特征是，所述电源模块还包括太阳能板，所述太阳能板表面依次设有防水层和防尘层。
4.根据权利要求3所述的一种配电网故障自动定位隔离开关控制系统，所述太阳能板一侧设有刮尘装置，所述刮尘装置包括刮尘条，所述刮尘条一端与太阳能板一端角通过旋转驱动结构连接，所述太阳能板一端角的两边设有止动条，所述旋转驱动结构与智能开关控制器电连接。
5.根据权利要求4所述的一种配电网故障自动定位隔离开关控制系统，其特征是，所述电压电流互感器包括采用阻容分压式的电压互感器和采用LPCT低功耗线圈的电流互感器。
6.一种配电网故障自动定位隔离开关控制方法，其特征是，采用权力要求1-3任一项所述系统。
7.根据权利要求6所述的一种配电网故障自动定位隔离开关控制方法，其特征是，包括每半周波计算一次电流基波有效值，若电流基波有效值大于预设第一保护定值，则启动故障确认延时，延时到达后触发继电器进行分合闸动作；若延时过程中基波有效值符合预设保护定值，则继电器动作保持。
8.根据权力要求6所述的一种配电网故障自动定位隔离开关控制方法，其特征是，包括每半周波计算一次电流基波有效值，如果电流基波大于第二保护定值时，检查二次谐波分量的值；如果二次谐波分量与基波分量值之比大于设定比例，则智能开启定时闭锁保护；定时时间到后，则智能开关复位；如果在闭锁时间内，二次谐波分量回归到第二保护定值内，则智能开关复位。
9.根据权利要求7或8所述的一种配电网故障自动定位隔离开关控制方法，其特征是，还包括当配电网中的某个节点电流超过第三保护定值或者该节点的零序电压或者零序电流超过设定阈值时，记录一段时间内的波形数据与开关位置并上传到数据处理器。
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Publication number Priority date Publication date Assignee Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116760190A (zh) * 2023-08-11 2023-09-15 深圳市银河通信科技有限公司 一种多线路互保的智能控制系统
CN116760190B (zh) * 2023-08-11 2023-12-29 深圳市银河通信科技有限公司 一种多线路互保的智能控制系统

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