CN112865030B - 一种硅链开路保护装置 - Google Patents

一种硅链开路保护装置 Download PDF

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CN112865030B
CN112865030B CN202110025455.9A CN202110025455A CN112865030B CN 112865030 B CN112865030 B CN 112865030B CN 202110025455 A CN202110025455 A CN 202110025455A CN 112865030 B CN112865030 B CN 112865030B
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central processing
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circuit
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CN112865030A (zh
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吴笑天
徐新
王昱
陈玮
常莎
蔡乙立
温荣超
魏圣泰
张蕾
陆波
卞亚芳
殷楷
刘卉
印吉景
卜鑫链
钱志斌
陈亮
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State Grid Jiangsu Electric Power Co Ltd
Taizhou Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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Taizhou Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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    • 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
    • H02H7/268—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 for dc systems
    • 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]
    • 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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Protection Of Static Devices (AREA)

Abstract

本发明属于电路保护领域，具体涉及一种硅链开路保护装置。本发明提供的一种硅链开路保护装置，能够在降压硅链发生开路故障时产生相关保护动作，避免直流系统控制母线失电的稳压保护装置。本发明提供的一种硅链开路保护装置，硅链电路串接在合闸母线与控制母线之间，包括备用硅链、供电单元、中央处理单元、检测单元和执行单元。本发明利用控制母线电压与硅链电流同时作为硅链是否断链的主要判据，准确可靠。本发明结构简易、指示明确、对原有回路不产生附加影响，在故障时能发出告警信号。本发明兼具经济性、实用性。整个装置经济性好，安装无需停电，更换方便，可在变电站直流系统运行时安装，能有效解决硅链开路故障问题。

Description

一种硅链开路保护装置
技术领域
本发明属于电路保护领域，具体涉及一种硅链开路保护装置。
背景技术
变电站直流系统的作用是对站内二次设备供电以及对一次设备进行操作、控制，直流系统母线分为合闸母线和控制母线，合闸母线电压通常在直流242-254V之间，控制母线为站内二次设备提供电源，额定电压一般为220V DC(220V系统)或110V DC(110V系统)。通常在合闸母线与控制母线之间串接降压硅链，满足控制母线的电压要求。降压硅链是由多片二极管串联构成，为能可靠调节母线电压，一般分为5档，每档可调节7V。
控制母线所带二次设备等负载在变电站安全稳定运行中起着重要作用，根据国家电网公司在《预防直流电源系统事故措施》的要求：在合闸母线与控制母线设有降压装置的系统，必须采取有效措施，防止降压装置开路造成控制母线失压。而降压硅链一旦故障，将造成控制母线失电。
发明内容
本发明提供的一种硅链开路保护装置，能够在降压硅链发生开路故障时产生相关保护动作，避免直流系统控制母线失电的稳压保护装置。
本发明提供的一种硅链开路保护装置，硅链电路串接在合闸母线与控制母线之间，其特征在于，包括备用硅链、供电单元、中央处理单元、检测单元和执行单元；
备用硅链并接在硅链电路的两侧；
供电单元输入端连接合闸母线，供电单元输出端连接中央处理单元；
检测单元的输入端检测硅链电路，检测单元的输出端连接中央处理单元；
执行单元的电源端连接合闸母线，执行单元的信号端连接中央处理单元，执行单元的执行端连接硅链电路；执行端包括直流接触器，直流接触器的控制线圈接于合闸母线并串接中央处理单元的一幅无源节点，直流接触器的输出单刀双掷触点同时与硅链电路和备用硅链串接，其中两个控制触点分别连接硅链电路和备用硅链。
作为本发明的进一步优化，检测单元包括电压检测模块和电流检测模块；
电压检测模块的输入端连接控制母线，电压检测模块的输出端连接中央处理单元；
电流检测模块的输入端采用开口霍尔电流传感器，开口霍尔电流传感器的开口端安装于硅链电路，电流检测模块的输出端连接中央处理单元。
作为本发明的进一步优化，执行端还包括复位按钮，复位按钮串接于直流接触器电源回路中。
作为本发明的进一步优化，还包括显示单元，显示单元与中央处理单元连接。
作为本发明的进一步优化，显示单元与中央处理单元通过RS485进行通信。
作为本发明的进一步优化，中央处理单元内设有告警信号电路。
本发明具有以下有益效果：
1、本发明利用控制母线电压与硅链电流同时作为硅链是否断链的主要判据，准确可靠。
2、本发明结构简易、指示明确、对原有回路不产生附加影响，在故障时能发出告警信号。
3、本发明兼具经济性、实用性。整个装置经济性好，安装无需停电，更换方便，可在变电站直流系统运行时安装，能有效解决硅链开路故障问题。
4、本发明备用硅链发挥与硅链电路同样的作用，检修更换时硅链的降压效果不会有任何影响。
5、本发明硅链电路与备用硅链轮流切换，彼此互不影响，检修前后无须对电路进行任何操作。
附图说明
图1是电路接线图；
其中，供电单元1、中央处理单元2、告警信号电路21、检测单元3、电压检测模块31，电流检测模块32、开口霍尔电流传感器32a、执行单元4、直流接触器41、单刀双掷触点42、复位按钮43、显示单元5、硅链电路6、备用链路7。
具体实施方式
如图1所示，本实施例中的硅链电路6串接在合闸母线与控制母线之间，本实施例包括供电单元1、中央处理单元2、检测单元3、执行单元4和备用链路7。
供电单元1用于给中央处理单元2供电，供电单元1的输入端连接合闸母线，将电压转换为24V DC后输出给中央处理单元2。
检测单元3用于检测硅链电路6是否正常。本实施例中的检测单元3采用电压检测模块31和电流检测模块32同时对电压和电流进行检测。电压检测模块31的输入端连接控制母线，输出端连接中央处理单元2，用于检测电路中的电压是否正常。电流检测模块32的输入端采用开口霍尔电流传感器32a，开口霍尔电流传感器32a的开口端安装于硅链电路6，电流检测模块32的输出端连接中央处理单元2，用于检测电路中的电流是否正常。
执行单元4的电源端连接合闸母线，执行单元4的信号端连接中央处理单元2，执行单元4的执行端连接硅链电路6。本实施例中的执行单元4包括直流接触器41，直流接触器41的控制线圈接于合闸母线并串接中央处理单元2的一幅无源节点DK，直流接触器41的输出为单刀双掷触点42，单刀双掷触点42包括两个控制触点和一个公共触点，其中两个控制触点分别连接硅链电路6和备用硅链7，公共触点同时与硅链电路6和备用硅链7串联，当公共触点与连接硅链电路6的触点接通时，备用硅链7处于开路状态，当公共触点与连接备用硅链7的触点接通时，硅链电路6处于开路状态。
本实施例工作原理如下：
如图1所示，正常工作情况下，供电单元1输入端经空开K1接合闸母线电压UH，输出24V DC为中央处理单元2提供电源。检测单元3中的电压检测模块31经空开K2采得控制母线电压UL，UL正常为220V；检测单元3中的电流检测模块32通过安装在硅链电路6前端的开口霍尔电流传感器32a采得控制母线负载电流IL，IL正常约为20A，采样频率为10Hz。中央处理单元2收到电压检测模块31和电流检测模块32的正常数据，输出无源节点DK不动作，此时执行单元4的直流接触器41线圈不得电，此时单刀双掷触点42连接硅链电路6的控制触点和公共触点连通，硅链电路6可正常运行，不影响调压功能。
如果硅链电路6出现开路故障，检测单元3中的电压检测模块31采得的控制母线电压UL下降为0，电流检测模块32采得的控制母线负载电流IL下降为0。中央处理单元2内设有压定值Ud和有流定值Id，当UL<Ud且IL<Id时，判硅链电路6故障，此时输出无源节点DK闭合，执行单元4的直流接触器41线圈得电并自保持，单刀双掷触点42连接硅链电路6的控制触点与公共触点断开，单刀双掷触点42连接备用硅链7的控制触点与公共触点连同，使得硅链电路6断电，备用硅链7通电，从而保持控制母线的压降与供电。
此时硅链电路6的两端处于断电状态，在检修人员抵达现场后，可在直流系统不停电条件下对硅链电路6的硅链进行维修或者更换。在故障处理完毕后，检修人员什么都不需要做，等到下次备用硅链7出现故障时，线路能自动切换到硅链电路6。这种设计不但使检修人员在检修过程中无须停电，而且检修完成后也无须再做复位的操作，大幅度提高了检修的便利性和检修人员的安全性，而且检修人员可以随时过来检修，提高了检修时间的灵活性。
当然，如有必要，也可以设置复位功能，即在执行单元4的中设置一个复位按钮43，复位按钮43串接于直流接触器41的电源回路中。再检修完成之后，可通过复位按钮43切回至硅链电路6通电的状态。
本实施例中的中央处理单元2内设有告警信号电路21。当硅链电路6与备用硅链7相互切换时，中央处理单元2将启动告警信号电路21，届时将开出一副故障时闭合的无源节点，该节点可接入变电站测控装置将告警信号传至站端后台和调度端，提醒运检人员前来维修。
本实施例还设有显示单元5，显示单元5与中央处理单元2连接并通过RS485通信。当硅链电路6被断电后，中央处理单元2将给显示单元5发送信号，显示单元5将现实显示ERR-1，同时点亮显示单元5内设的告警灯。
本实施例能对自身的两种不正常工作状态发出告警，一种是电源消失，即供电单元1输入端失去电压时，中央处理单元2将开出一副故障时闭合的无源节点，向运检人员发出告警；二是采集异常，即检测单元3采集的电压或电流为0时，中央处理单元2将开出一副故障时闭合的无源节点，同时在显示单元5上显示ERR-2，表示采集异常。
最后应当说明的是，以上实施例仅用以说明本发明的技术方案，而非对本发明保护范围的限制，尽管参照较佳实施例对本发明作了详细地说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的实质和范围。

Claims (4)

1.一种硅链开路保护装置，硅链电路串接在合闸母线与控制母线之间，其特征在于，包括备用硅链、供电单元、中央处理单元、检测单元和执行单元；
备用硅链并接在硅链电路的两侧；
供电单元输入端连接合闸母线，供电单元输出端连接中央处理单元；
检测单元的输入端连接合闸母线和控制母线，检测单元的输出端连接中央处理单元；
执行单元的电源端连接合闸母线，执行单元的信号端连接中央处理单元，执行单元的执行端连接硅链电路；执行端包括直流接触器，直流接触器的控制线圈接于合闸母线并串接中央处理单元的一幅无源节点，直流接触器的输出为单刀双掷触点，包括两个控制触点和一个公共触点，两个控制触点分别与硅链电路和备用硅链的输出端连接，一个公共触点与控制母线连接；
检测单元包括电压检测模块和电流检测模块；
电压检测模块的输入端连接控制母线，电压检测模块的输出端连接中央处理单元；
电流检测模块的输入端采用开口霍尔电流传感器，开口霍尔电流传感器的开口端安装于合闸母线与硅链电路和备用硅链的输入端之间，电流检测模块的输出端连接中央处理单元；执行端还包括复位按钮，复位按钮串接于直流接触器电源回路中。
2.根据权利要求1所述的一种硅链开路保护装置，其特征在于，还包括显示单元，显示单元与中央处理单元连接。
3.根据权利要求2所述的一种硅链开路保护装置，其特征在于，显示单元与中央处理单元通过RS485进行通信。
4.根据权利要求1所述的一种硅链开路保护装置，其特征在于，中央处理单元内设有告警信号电路。
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CN101841186A (zh) * 2010-04-28 2010-09-22 四川省电力公司广安电业局 直流系统备用硅链自动投入装置
CN110880807A (zh) * 2019-11-25 2020-03-13 广东电网有限责任公司 一种两段直流电源母线带降压硅链开路保护系统

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CN101841186A (zh) * 2010-04-28 2010-09-22 四川省电力公司广安电业局 直流系统备用硅链自动投入装置
CN110880807A (zh) * 2019-11-25 2020-03-13 广东电网有限责任公司 一种两段直流电源母线带降压硅链开路保护系统

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