CN112398125A - 一种低压故障自愈装置及其控制方法 - Google Patents

一种低压故障自愈装置及其控制方法 Download PDF

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CN112398125A
CN112398125A CN202011311361.XA CN202011311361A CN112398125A CN 112398125 A CN112398125 A CN 112398125A CN 202011311361 A CN202011311361 A CN 202011311361A CN 112398125 A CN112398125 A CN 112398125A
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switch
incoming line
transformer
line switch
inlet wire
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向根华
许守宏
罗泳
钟万华
袁仁靖
雷钊洪
郑少杰
黎瀚龙
梁小燕
万宇明
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Qingyuan Xinneng Power Engineering Co ltd
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GUANGDONG BEIJIANG SWITCH FACTORY CO Ltd
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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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
    • 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
    • H02J13/00002—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 monitoring
    • 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
    • H02J13/00016—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 a wired telecommunication network or a data transmission bus
    • 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
    • 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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • 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
    • Y04S10/18—Systems supporting electrical power generation, transmission or distribution using switches, relays or circuit breakers, e.g. intelligent electronic devices [IED]
    • 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
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses

Abstract

一种低压故障自愈装置，包括至少两个电房进线机构，所述电房进线机构包括两台变压器，每台变压器均连接一根进线，进线上设有进线开关，两根进线通过连接线路连接，连接线路上设有母联开关，进线上装接有出线，出线与用电末端连接，出线上设有出线开关，至少两个电房中的相邻的两个电房之间通过转供电线路连接，该转供电线路上设有转供电开关，转供电开关、出线开关、进线开关、母联开关均与电监控终端通讯连接。本发明完善了低压网架结构，实现自动分断进出线开关及跨电房负荷转供电功能。

Description

一种低压故障自愈装置及其控制方法
技术领域
本发明涉及低压0.4kV配电系统行业,特别涉及一种低压故障自愈装置及其控制方法。
背景技术
用信息化技术改造传统电网是智能电网的核心内容，在电能生产、高压传输、中压变电站等环节的遥测、远动等智能化技术已经普及，但电网末端的终端低压配电站却鲜有实施智能化监控系统，而这些节点大量地分布在城市、工厂、交通、农业生产等领域，其运行状态是否正常直接关系到终端用户的用电安全，也会影响整个电网的稳定供电，因此，对末端变配电站、配电房进行有效地电力和环境监控，是解决智能电网建设最后一公里的关键所在。
发明内容
本发明要解决的技术问题是提供一种低压故障自愈装置及其控制方法。
为了解决上述技术问题，本发明采取以下技术方案：
一种低压故障自愈装置，包括至少两个电房进线机构，所述电房进线机构包括两台变压器，每台变压器均连接一根进线，进线上设有进线开关，两根进线通过连接线路连接，连接线路上设有母联开关，进线上装接有出线，出线与用电末端连接，出线上设有出线开关，至少两个电房中的相邻的两个电房之间通过转供电线路连接，该转供电线路上设有转供电开关，转供电开关、出线开关、进线开关、母联开关均与电监控终端通讯连接。
所述转供电线路与进线连接。
所述每根进线上都连接有若干根出线，每根出线上都设有出线开关。
所述转供电开关、出线开关、进线开关、母联开关分别通过485总线与电监控终端通讯连接。
所述进线的电压为0.4KV。
一种低压故障自愈装置的控制方法，包括以下步骤：
设定有两个电房进线机构，包括：第一变压器、第二变压器、第三变压器、第四变压器，第一变压器连接进线开关QF1，第二变压器连接进线开关QF2，进线开关QF1和进线开关QF2间连接有母联开关QF3，进线开关QF1和进线开关QF2分别连接有若干个分支出线，第三变压器连接进线开关QF4，第四变压器连接进线开关QF5，进线开关QF4和进线开关QF5间连接有母联开关QF6，进线开关QF4和进线开关QF5分别连接有若干个分支出线，进线开关QF2和进线开关QF4通过负荷转换开关QF7连接，第一变压器、第二变压器、第三变压器、第四变压器输出的进线电压为低压0.4KV；
当QF1、QF2均失压时，对线路进行检查，在进线和出线回路均无故障报警时，QF1和QF2先进行失压跳闸，待QF1和QF2分闸后，计算历史同期负载电流，若QF1、QF2、QF4历史同期负载电流之和小于QF4额定电流，则合闸QF7和QF3，由第三变压器进行转换供电；若QF1、QF2、QF4历史同期负载电流之和大于QF4额定电流，则按照历史同期负载率，切除出线上连接的3级或者2级负荷，再合闸QF7和QF3。
所述QF7合闸之后，存在变压器失压时，当分支出线和进线开关无故障时，再计算同期历史负荷QF1、QF2、QF4、QF5的负载电流之和，若小于需要转供的进线开关额定值，则合闸QF3、QF6，若大于，将分支出线上的相应的2级负荷和3级负荷后，再合闸QF3、QF6。
本发明完善了低压网架结构，实现自动分断进出线开关及跨电房负荷转供电功能。
附图说明
附图1为本发明实施例结构示意图。
具体实施方式
为能进一步了解本发明的特征、技术手段以及所达到的具体目的、功能，下面结合附图与具体实施方式对本发明作进一步详细描述。
如附图1所示，本发明揭示了一种低压故障自愈装置，包括至少两个电房进线机构，所述电房进线机构包括两台变压器，每台变压器均连接一根进线，进线上设有进线开关，两根进线通过连接线路连接，连接线路上设有母联开关，进线上装接有出线，出线与用电末端连接，出线上设有出线开关，至少两个电房中的相邻的两个电房之间通过转供电线路连接，该转供电线路上设有转供电开关，转供电开关、出线开关、进线开关、母联开关均与电监控终端通讯连接。
所述转供电开关、出线开关、进线开关、母联开关分别通过485总线与电监控终端通讯连接，实现远程监控和控制，及时获取相关的运行状态信息。
变压器的进电通常可为10KV，出电为0.4KV的低压。
在本实施例中，设定有两个配电房，包括：第一变压器、第二变压器、第三变压器、第四变压器，第一变压器连接进线开关QF1，第二变压器连接进线开关QF2，进线开关QF1和进线开关QF2间连接有母联开关QF3，进线开关QF1和进线开关QF2分别连接有若干个分支出线，第三变压器连接进线开关QF4，第四变压器连接进线开关QF5，进线开关QF4和进线开关QF5间连接有母联开关QF6，进线开关QF4和进线开关QF5分别连接有若干个分支出线，进线开关QF2和进线开关QF4通过负荷转换开关QF7连接，进线开关QF1、进线开关QF2、进线开关QF3和进线开关QF4所在的线路均为总进线，进线电压为低压0.4KV。
分支出线中根据需要设置多个，比如进线开关QF1对应连接的分支出线上设有出线开关QF11、出线开关QF12，进线开关QF2对应连接的分支出线上设有出线开关QF21、出线开关QF22，进线开关QF4对应连接的分支出线上设有出线开关QF41、出线开关QF42，进线开关QF5对应连接的分支出线上设有出线开关QF51、出线开关QF52,分别连接用电末端。
一种低压故障自愈装置的控制方法，包括以下步骤：
当QF1、QF2均失压时，对线路进行检查，在进线和出线回路均无故障报警时，QF1和QF2先进行失压跳闸，待QF1和QF2分闸后，计算历史同期负载电流，若QF1、QF2、QF4历史同期负载电流之和小于QF4额定电流，则合闸QF7和QF3，由第三变压器进行转换供电；若QF1、QF2、QF4历史同期负载电流之和大于QF4额定电流，则按照历史同期负载率，切除出线上连接的3级或者2级负荷，再合闸QF7和QF3。
所述QF7合闸之后，存在变压器失压时，当分支出线和进线开关无故障时，再计算同期历史负荷QF1、QF2、QF4、QF5的负载电流之和，若小于需要转供的进线开关额定值，则合闸QF3、QF6，若大于，将分支出线上的相应的2级负荷和3级负荷后，再合闸QF3、QF6。
本发明中，当分支出线回路出现故障时，通过相应的开关断开，精定位分支回路故障类型，并隔离该故障回路，从而对故障起到隔离的作用，避免造成其他支路的影响。
当进线开关跳闸时，可利用其他电房进行转供电处理，确保正常运行供电。
通过转供电开关，实现转供电操作。而传统的一个电房的变压器的10KV线路发生故障没有办法正常给变压器进电时，同一个电房的两台变压器之间无法进行转供电操作。而利用多个电房之间的连接，当低压总进线开关跳闸时，系统先闭锁故障自愈功能，当检测到发生故障的低压分支回路，并精确隔离后，解锁故障自愈功能。通过其他电房的转供电操作，保证线路的正常运行。
需要说明的是，以上仅为本发明的优选实施例而已，并不用于限制本发明，尽管参照实施例对本发明进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换，但是凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (7)

1.一种低压故障自愈装置，其特征在于，包括至少两个电房进线机构，所述电房进线机构包括两台变压器，每台变压器均连接一根进线，进线上设有进线开关，两根进线通过连接线路连接，连接线路上设有母联开关，进线上装接有出线，出线与用电末端连接，出线上设有出线开关，至少两个电房中的相邻的两个电房之间通过转供电线路连接，该转供电线路上设有转供电开关，转供电开关、出线开关、进线开关、母联开关均与电监控终端通讯连接。
2.根据权利要求1所述的低压故障自愈装置，其特征在于，所述转供电线路与进线连接。
3.根据权利要求2述的低压故障自愈装置，其特征在于，所述每根进线上都连接有若干根出线，每根出线上都设有出线开关。
4.根据权利要求3述的低压故障自愈装置，其特征在于，所述转供电开关、出线开关、进线开关、母联开关分别通过485总线与电监控终端通讯连接。
5.根据权利要求4的低压故障自愈装置，其特征在于，所述进线的电压为0.4KV。
6.一种低压故障自愈装置的控制方法，其特征在于，包括以下步骤：
设定有两个电房进线机构，包括：第一变压器、第二变压器、第三变压器、第四变压器，第一变压器连接进线开关QF1，第二变压器连接进线开关QF2，进线开关QF1和进线开关QF2间连接有母联开关QF3，进线开关QF1和进线开关QF2分别连接有若干个分支出线，第三变压器连接进线开关QF4，第四变压器连接进线开关QF5，进线开关QF4和进线开关QF5间连接有母联开关QF6，进线开关QF4和进线开关QF5分别连接有若干个分支出线，进线开关QF2和进线开关QF4通过负荷转换开关QF7连接，第一变压器、第二变压器、第三变压器、第四变压器输出的进线电压为低压0.4KV；
当QF1、QF2均失压时，对线路进行检查，在进线和出线回路均无故障报警时，QF1和QF2先进行失压跳闸，待QF1和QF2分闸后，计算历史同期负载电流，若QF1、QF2、QF4历史同期负载电流之和小于QF4额定电流，则合闸QF7和QF3，由第三变压器进行转换供电；若QF1、QF2、QF4历史同期负载电流之和大于QF4额定电流，则按照历史同期负载率，切除出线上连接的3级或者2级负荷，再合闸QF7和QF3。
7.根据权利要求6所述的低压故障自愈装置的控制方法，其特征在于，所述QF7合闸之后，存在变压器失压时，当分支出线和进线开关无故障时，再计算同期历史负荷QF1、QF2、QF4、QF5的负载电流之和，若小于需要转供的进线开关额定值，则合闸QF3、QF6，若大于，将分支出线上的相应的2级负荷和3级负荷后，再合闸QF3、QF6。
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CN114389369A (zh) * 2022-03-23 2022-04-22 广东承能电力安装有限公司 一种电房负荷智能监控系统及方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114389369A (zh) * 2022-03-23 2022-04-22 广东承能电力安装有限公司 一种电房负荷智能监控系统及方法
CN114389369B (zh) * 2022-03-23 2022-07-05 广东承能电力安装有限公司 一种电房负荷智能监控系统及方法

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