WO2012149835A1 - 一种大电流整流器设备的熔断器状态的检测方法 - Google Patents

一种大电流整流器设备的熔断器状态的检测方法 Download PDF

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WO2012149835A1
WO2012149835A1 PCT/CN2012/071574 CN2012071574W WO2012149835A1 WO 2012149835 A1 WO2012149835 A1 WO 2012149835A1 CN 2012071574 W CN2012071574 W CN 2012071574W WO 2012149835 A1 WO2012149835 A1 WO 2012149835A1
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fuse
arm
normally closed
node
normally open
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PCT/CN2012/071574
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English (en)
French (fr)
Inventor
张普红
周奇
林继如
吴瑶
黎军
侯凌峰
霍健
王立春
王兴
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北京荣科恒阳整流技术有限公司
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Publication of WO2012149835A1 publication Critical patent/WO2012149835A1/zh

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    • 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
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/74—Testing of fuses

Definitions

  • the invention relates to a method for detecting a fuse state of a high current rectifier device, which is applied to a rectification metallurgy industry. Background technique
  • the fast-blow fuse is one of the main protection measures when the rectifier has some important faults. Therefore, it is very important to make a reasonable and reliable judgment on the signal and generate corresponding actions.
  • the fast-blowing signal generally uses a normally closed node, and a resistor is connected to the normally closed node, and the method of detecting the analog level is used to judge the single and multiple fast-blows; the advantage of this method is that the circuit is simple and sensitive. High, and when the device itself (micro switch) fails, it can be operated, let the operator know in time; The disadvantage is that in the environment with large magnetic field and vibration, it is prone to malfunction; At the same time, the number of wires is large, and the common opening point is detected. The method is the same, wiring is difficult, and there are many I/O interfaces required.
  • the fast-blown signal + branch current signal comprehensive processing scheme can realize the circuit design, but there are two problems.
  • the branch current detection loop should be installed, which increases the equipment cost by several tens of thousands, and the compact design of the rectifier. It is very inconvenient to install the branch current detection loop;
  • the fast-fuse + branch current is comprehensively judged, and the fault judgment logic is complicated. It is necessary to design a special circuit, and there is an analog quantity in the logic judgment process here. Sampling and comparison, which must be designed for anti-interference, complex circuits are not recommended in complex magnetic field environments;
  • the method of detecting the normally open node and the normally closed node is doubled because the number of wires is doubled, wiring is more difficult, and more I/O detection modules are needed at the same time, which increases the investment. This method has not been reported.
  • An object of the present invention is to provide a method for detecting a fuse state of a high current rectifier device, which detects the state of each fuse by simultaneously detecting a normally open node and a normally closed node of the fuse by scanning.
  • the method improves the accuracy of the fuse state detection under the high magnetic field and high vibration of the high current rectifier valve cabinet, reduces the wiring amount in the rectifier cabinet body, greatly saves the production cost, reduces the complexity of the equipment, and improves the equipment.
  • the anti-interference ability makes the equipment run more reliable.
  • a method for detecting a fuse state of a high current rectifier device which simultaneously detects a normally open node and a normally closed node of a fuse to achieve a purpose of detecting a fuse state, wherein the scan line is in units of a commutating arm, and the arm is scanned and blown
  • the common end of the auxiliary node of the auxiliary arm; the normally open node of each fuse of the rectifying arm is respectively connected with the return line of the normally open node, and the normally closed node of each fuse is respectively connected with the return line of the normally closed node;
  • the position of the fuse normally open node, the normally closed node respectively share a return line;
  • the scan line, the fuse normally open node return line and the other end of the fuse normally closed node return line are respectively connected with the FPGA central processor;
  • the scanning line Yi-Yu is scanned by arm of each commutator arm, and the effective scanning signal is 0, low level;
  • the normally open node return line -R m is connected to the fuse open node of each rectifier arm of the same physical position. When the fuse is normal, it is
  • the normally closed node return line dC m is connected to the fuse normally closed node of each rectifier arm of the same physical position. When the fuse is normal, it is 0, low level; when the fault is 1, it is high level.
  • the beneficial effects of the present invention are - 1) application under the severe vibration generated in the high current and high magnetic field rectifier valve cabinet, which greatly improves the accuracy of the fuse state detection.
  • FIG. 1 is a structural view of a state scan detecting unit of a thyristor branch fuse
  • FIG. 1 shows the topology of the high current rectifier.
  • a fuse state detection method for a large current rectifier uses a method of simultaneously scanning a normally open node and a normally closed node of a fuse to realize a function of detecting a state of a fuse in a rectifier.
  • the matrix is constructed according to the physical position and electrical principle of the fuse, and the scanning matrix is built.
  • the auxiliary node of the fuse has three outputs connected to the normally open node, the normally closed node and the common terminal.
  • the scanning line Yl-Yn scans the common end of the fuse auxiliary node in units of the rectifying arm; the normally open node of each fuse of the rectifying arm is respectively connected with the return line R, and the normally closed node is respectively connected with the return line C connection.
  • Each of the normally open nodes and the normally closed nodes of the fuses of the same physical position of each of the commutating arms share a return line.
  • the scan line, the fuse normally open node return line and the other end of the fuse normally closed node return line are respectively connected to the FPGA central processor.
  • Scanning line Yi-Yu scans each arm in units of arms.
  • the effective scan signal is 0, low.
  • the return line RR m is the return line of the normally open node of the fuse. When the fuse is in the normal state, it is 1, high level; when the fuse is faulty, it is 0, low level.
  • the return line CC m is the return line of the normally closed node of the fuse. When the fuse is in the normal state, it is 0, low level; when the fuse is faulty, it is 1, high level.
  • n is the number of rectifier bridge arms, generally 6, when the number of parallel thyristors is greater than 8, it is often divided into two arm installations, then n can be taken as 12 according to the physical position of the fuse installation.
  • m is the number of thyristors connected to each arm of the rectifier, generally not more than 8.
  • the scanning method has the characteristics that the state judgment classification is clear and accurate, the hardware implementation is simple and reliable, and the investment is relatively reduced.
  • the application advantages in the field of high current rectifiers are significant.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fuses (AREA)

Abstract

本发明涉及一种大电流整流器设备的熔断器状态检测方法，该方法通过扫描方式同时检测熔断器常开节点与常闭节点来达到检测熔断器状态的目的，扫描线以整流臂为单位，逐臂扫描熔断器辅助节点的公共端；整流臂每只熔断器的常开节点分别与常开节点回复线相连接，每只熔断器的常闭节点分别与常闭节点回复线相连接；各整流臂同一物理位置的熔断器常开节点、常闭节点分别共用一根回复线。本发明的有益效果是：提高了在大电流整流器阀柜强磁场高振动下的熔断器状态检测的准确性，减少了整流柜体内的配线量，大大节约了生产成本；降低了设备的复杂性，提高了设备的抗干扰性，使设备运行更加可靠。

Description

一种大电流整流器设备的熔断器状态的检测方法 技术领域
本发明涉及一种大电流整流器设备的熔断器状态的检测方法， 应用于整流冶金行业。 背景技术
快速熔断器作为整流器中的重要保护器件，是整流器出现某些重要故障时主要保护措施 之一， 因此对其信号进行合理、 可靠的判断并产生相应的动作十分重要；
现有技术中快速熔断器的检测方法有以下几种：
1 ) 检测熔断器常开节点
国内的厂家大多采用检测常开节点作为快熔断保护的方式，此方式动作明晰，误动作少， 但如果快熔微动开关本身损坏不能及时发现， 当出现真故障时不能动作； 解决此问题一般采 用定期检修制度， 但一些生产工艺长年不停车， 无法进行检修； 同时接线数量众多， 一般要 连接几十根甚至上百根电线， 配线较困难， 需求的 I/O接口众多。
2) 检测熔断器常闭节点
快熔断的信号一般是采用常闭节点， 并在常闭节点上并接电阻， 用检测模拟量电平的方 法来进行单只和多只快熔断的判断；此方法的优点是电路简单、灵敏度高，且当器件本身（微 动开关） 出现故障时能动作， 让运行人员及时知道； 缺点是在大磁场且有振动的环境中， 容 易出现误动作； 同时接线数量众多， 与检测常开点方法相同， 配线困难， 需求的 I/O接口众 多。
3 ) 检测熔断器常开节点 +晶闸管电流
快熔断信号 +支路电流信号综合处理方案， 电路设计可以实现， 但存在两方面的问题， 其一， 要安装支路电流检测环， 相应增加了几万元设备成本， 而整流器的紧凑设计方式很不 方便安装支路电流检测环； 其二， 在如此大磁场中进行快熔断 +支路电流综合判断， 故障判 断逻辑复杂， 要设计专门电路， 在此处的逻辑判断过程中有模拟量的采样和比对， 其中必定 要进行抗干扰设计， 复杂磁场环境下不建议采用复杂电路；
目前同时检测常开节点与常闭节点的方法因为接线数量会增加一倍， 配线更加困难， 同 时需要配备更多的 I/O检测模块， 增加了投资， 此种方法未见报道。
在目前情况下，寻求一种简单可靠的检测方法成为该领域的研究目标。采用扫描方法同 时检测整流器装置中熔断器的常开节点和常闭节点的方法未见报道。 发明内容
本发明的目的是提供一种大电流整流器设备的熔断器状态检测方法，该方法通过扫描方 式同时检测熔断器常开节点与常闭节点， 来实现检测各熔断器状态的目的。该方法提高了在 大电流整流器阀柜强磁场高振动下的熔断器状态检测的准确性， 减少了整流柜体内的配线 量， 大大节约了生产成本； 降低了设备的复杂性， 提高了设备的抗干扰性， 使设备运行更加 可靠。
为实现上述目的， 本发明通过以下技术方案实现：
一种大电流整流器设备的熔断器状态检测方法，该方法通过扫描方式同时检测熔断器常 开节点与常闭节点来达到检测熔断器状态的目的， 扫描线以整流臂为单位， 逐臂扫描熔断器 辅助节点的公共端； 整流臂每只熔断器的常开节点分别与常开节点回复线相连接， 每只熔断 器的常闭节点分别与常闭节点回复线相连接； 各整流臂同一物理位置的熔断器常开节点、 常 闭节点分别共用一根回复线； 扫描线、熔断器常开节点回复线与熔断器常闭节点回复线另一 端分别与 FPGA中央处理器相连接；
扫描线 Yi-Yu以各整流臂为单位， 逐臂扫描， 有效扫描信号为 0， 低电平；
常开节点回复线 -Rm接同一物理位置的各整流臂的熔断器常开节点，熔断器正常时为
1， 高电平； 故障时为 0， 低电平；
常闭节点回复线 d-Cm接同一物理位置的各整流臂的熔断器常闭节点，熔断器正常时为 0， 低电平； 故障时为 1， 高电平。
与现有技术相比， 本发明的有益效果是- 1 ) 在大电流高磁场整流器阀柜中产生的剧烈振动下应用，大大提高了熔断器状态检测 的准确性。
2) 减少了整流柜内的配线量， 提高了生产效率。
3) 减少了 I/O配置数量， 节约了成本。
4) 降低了设备的复杂性， 提高了设备的抗干扰性， 使设备运行更加可靠。
当整流器电流越大， 并联的晶闸管数量越多时， 熔断器矩阵行列数量就会越多， 其 1)-4) 条优越性会更加突出。 附图说明
图 1是晶闸管支路熔断器的状态扫描检测单元的结构图;
图 2为大电流整流器拓扑图。 具体实施方式
见图 1、 图 2， 一种大电流整流器的熔断器状态扫描检测方法， 该方法采用同时扫描熔 断器常开节点和常闭节点的方法， 实现对整流器内熔断器状态的检测功能。
按熔断器的物理位置及电气原理构成矩阵， 搭建扫描矩阵。熔断器的辅助节点有三个输 出端分别接至常开节点、 常闭节点和公共端。 扫描线 Yl-Yn 以整流臂为单位， 逐臂扫描熔 断器辅助节点的公共端； 整流臂的每只熔断器的常开节点分别与回复线 R相连接，常闭节点 分别与回复线 C相连接。各整流臂同一物理位置的熔断器的常开节点、常闭节点分别共用一 根回复线。扫描线、熔断器常开节点回复线与熔断器常闭节点回复线另一端分别与 FPGA中 央处理器相连接。
扫描线 Yi-Yu以各整流臂为单位， 逐臂扫描。 有效扫描信号为 0， 低电平。
回复线 R Rm为熔断器常开节点回复线， 熔断器正常状态时为 1， 高电平； 熔断器故障 时为 0， 低电平。
回复线 C Cm为熔断器常闭节点回复线， 熔断器正常状态时为 0， 低电平； 熔断器故障 时为 1， 高电平。
表 1： 熔断器状态判断逻辑
Figure imgf000005_0001
其中 i=l,2,3 n; j= 1,2,3 m
n为整流器桥臂数量， 一般为 6， 当并联的晶闸管数量大于 8时， 常分为两臂安装， 此 时 n可按熔断器安装的物理位置取为 12。
m为整流器每臂并联晶闸管的数量， 一般不大于 8。
实验证明： 该扫描方式与传统的熔断器检测方式相比具有状态判断分类明晰准确， 硬件 实现简单可靠， 投资相对减少的特点。 在大电流整流器领域应用优势显著。

Claims

^ ^
1、 一种大电流整流器设备的熔断器状态检测方法， 其特征在于， 该方法通过扫描方式 同时检测熔断器常开节点与常闭节点来达到检测熔断器状态的目的， 扫描线以整流臂为单 位， 逐臂扫描熔断器辅助节点的公共端； 整流臂每只熔断器的常开节点分别与常开节点回复 线相连接， 每只熔断器的常闭节点分别与常闭节点回复线相连接； 各整流臂同一物理位置的 熔断器常开节点、 常闭节点分别共用一根回复线； 扫描线、 熔断器常开节点回复线与熔断器 常闭节点回复线另一端分别与 FPGA中央处理器相连接；
扫描线 Yi-Yu以各整流臂为单位， 逐臂扫描， 有效扫描信号为 0， 低电平；
常开节点回复线 -Rm接同一物理位置的各整流臂的熔断器常开节点，熔断器正常时为
1， 高电平； 故障时为 0， 低电平；
常闭节点回复线^-0„接同一物理位置的各整流臂的熔断器常闭节点，熔断器正常时为 0， 低电平； 故障时为 1， 高电平。
PCT/CN2012/071574 2011-05-04 2012-02-24 一种大电流整流器设备的熔断器状态的检测方法 WO2012149835A1 (zh)

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CN104198880B (zh) * 2014-08-13 2016-10-26 常州常利来电子有限公司 保险丝管测试机
CN104793130B (zh) * 2015-03-25 2016-04-13 国家电网公司 一种熔断器在线监测系统
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