CN102445582A - Primary current sensor structure suitable for high-voltage direct current measurement - Google Patents
Primary current sensor structure suitable for high-voltage direct current measurementDownload PDFInfo
- Publication number
- CN102445582A CN102445582ACN2011103679097ACN201110367909ACN102445582ACN 102445582 ACN102445582 ACN 102445582ACN 2011103679097 ACN2011103679097 ACN 2011103679097ACN 201110367909 ACN201110367909 ACN 201110367909ACN 102445582 ACN102445582 ACN 102445582A
- Authority
- CN
- China
- Prior art keywords
- shunt
- primary current
- current sensor
- copper
- tube type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及一种一次电流传感器，尤其涉及一种适用于高压直流测量的一次电流传感器结构，属于高压直流电流测量技术领域。The invention relates to a primary current sensor, in particular to a primary current sensor structure suitable for high-voltage direct current measurement, and belongs to the technical field of high-voltage direct current measurement.
背景技术Background technique
随着直流输电的发展，高压直流电流量的测量技术成为新的研究方向。传统的高压直流电流传感器是利用电磁感应原理，需外加辅助电源，其暂态特性差、易受外界电磁场干扰、抗饱和能力差，且随电压等级的升高，其绝缘实现的难度和造价成几何倍数增加，因此研究新型的高压直流传感器成为电力发展的需要。With the development of DC transmission, the measurement technology of high-voltage DC current has become a new research direction. The traditional high-voltage DC current sensor uses the principle of electromagnetic induction and requires an external auxiliary power supply. Its transient characteristics are poor, it is easily disturbed by external electromagnetic fields, and its anti-saturation ability is poor. The geometrical multiple increases, so the research on new high-voltage DC sensors becomes the need for electric power development.
结合现代光纤传导技术的电子式直流电流互感器采用“分流器+罗氏线圈+光纤传输”技术，相对传统电磁感应原理的互感器，存在以下优点：①分流器不受外界电磁场干扰，测量精度和稳定度高；②罗氏线圈不受直流分量影响，能有效测量直流系统中的谐波电流；③光纤传导的技术的应用一方面解决了信号高低压侧隔离的难题，另一方面可以使测量信号无损传输，提高了测量精度。以上优点使得这种互感器非常适用于高压直流输电系统，其主要由4个部分组成：一次电流传感器、一次转换器、信号传输系统以及合并单元。The electronic DC current transformer combined with modern optical fiber transmission technology adopts the technology of "shunt + Rogowski coil + optical fiber transmission". High stability; ②The Rogowski coil is not affected by the DC component, and can effectively measure the harmonic current in the DC system; ③The application of optical fiber transmission technology solves the problem of signal high and low voltage side isolation on the one hand, and on the other hand can make the measurement signal Lossless transmission improves measurement accuracy. The above advantages make this transformer very suitable for high-voltage direct current transmission system, which is mainly composed of four parts: primary current sensor, primary converter, signal transmission system and merging unit.
这种测量系统的核心是一次电流传感器，其输出为极其微弱的mV级电压信号，其结构部分对其输出精度影响较大，是直流系统测量实现的难题。The core of this measurement system is the primary current sensor, whose output is an extremely weak mV-level voltage signal, and its structural part has a great influence on its output accuracy, which is a difficult problem in the realization of DC system measurement.
发明内容Contents of the invention
本发明的目的是提供一种适用于高压直流系统测量用的一次电流传感器结构，其克服了传统传感器的缺陷，输出精度高、干扰能力强、结构简单、体积小、重量轻、制造成本低。The purpose of the present invention is to provide a primary current sensor structure suitable for high-voltage direct current system measurement, which overcomes the defects of traditional sensors, and has high output accuracy, strong interference capability, simple structure, small size, light weight and low manufacturing cost.
为达到本发明的目的，所采用的技术方案是： For reaching the purpose of the present invention, the technical scheme adopted is:
一种适用于高压直流测量的一次电流传感器结构，其特征是，包含A primary current sensor structure suitable for high-voltage direct current measurement, characterized by comprising
向两端延伸的第一段管型母线和第二段管型母线，The first section of tubular busbar and the second section of tubular busbar extending to both ends,
由卡箍固定于所述第二段管型母线上的穿心式的罗氏线圈，a through-heart Rogowski coil fixed on the second section of tubular busbar by a clamp,
通过信号线与所述罗氏线圈连接的分流器， A shunt connected with the Rogowski coil through a signal line,
所述分流器的一端与所述第一段管型母线刚性连接，另一端通过多根软铜连接片与所述第二段管型母线连接，所述第一段管型母线与所述第二段管型母线通过多根连接条刚性连接。One end of the splitter is rigidly connected to the first section of tubular busbar, and the other end is connected to the second section of tubular busbar through a plurality of annealed copper connecting pieces, and the first section of tubular busbar is connected to the first section of tubular busbar. The two-section tubular busbars are rigidly connected through multiple connecting bars.
所述分流器为鼠笼式结构，两端分别为铜盘，两个铜盘之间由多根实心锰铜棒连接，一次电流从两端的所述铜盘的电流接入端接入，输出信号线从所述铜盘圆心处引出。The shunt is of a squirrel-cage structure, with copper plates at both ends, and a plurality of solid manganin rods connecting the two copper plates. The signal line is led out from the center of the copper disc.
所述第一段管型母线与所述分流器一端的铜盘通过一法兰盘刚性连接，所述第二段管型母线与另一法兰盘刚性连接后再与所述软铜连接片一端柔性连接，所述软铜连接片另一端与所述分流器另一端的铜盘柔性连接。The first section of tubular busbar is rigidly connected to the copper plate at one end of the diverter through a flange, and the second section of tubular busbar is rigidly connected to another flange and then connected to the soft copper connecting piece One end is flexibly connected, and the other end of the soft copper connecting piece is flexibly connected to the copper plate at the other end of the shunt.
所述一法兰盘与所述另一法兰盘通过多根连接条刚性连接。The one flange is rigidly connected to the other flange through a plurality of connecting bars.
所述罗氏线圈为采用外积分式，铝壳封装，通过铝制卡箍固定在所述第二段管型母线上。The Rogowski coil adopts an external integral type, is packaged in an aluminum shell, and is fixed on the second tubular busbar through an aluminum clamp.
所述分流器水平方向设置，位于下方的所述连接条上设有用来支撑所述分流器的柔性连接端的凸台。The diverter is arranged in a horizontal direction, and the connecting bar below is provided with a boss for supporting the flexible connection end of the diverter.
还包含一固定于所述一法兰盘与所述另一法兰盘上的对传感器起防护的不锈钢外罩。It also includes a stainless steel cover fixed on the one flange and the other flange to protect the sensor.
还包含两个铝制均压环，所述均压环固定于所述不锈钢外罩上。It also includes two aluminum pressure equalizing rings, the said pressure equalizing rings are fixed on the stainless steel outer cover.
所述信号线通过不锈钢螺纹管向外引出。The signal line is led out through a stainless steel threaded pipe.
所述连接条为不锈钢连接条。The connecting bar is a stainless steel connecting bar.
所述管型母线为铝制管型母线，所述法兰盘为铝质法兰盘，所述分流器两端为铜盘，所述分流器、所述软铜连接片与所述法兰盘连接时，在其结合面设置一铜铝过渡材料构成的过渡层。The tubular busbar is an aluminum tubular busbar, the flange is an aluminum flange, both ends of the diverter are copper discs, the diverter, the soft copper connecting piece and the flange When the pads are connected, a transition layer made of copper-aluminum transition material is provided on the joint surface.
本发明的方案要点是：①通过分析分流器特性设计了适用于高压直流测量用的鼠笼型分流器结构；②通过分析了罗氏线圈的测量原理以及制造关键工艺设计了外积分式罗氏线圈结构；③将设计好的分流器、罗氏线圈与导电连接部分组合成一次电流传感器， 通过分析温升影响、外磁场干扰、应力影响、户外防护等因素对其结构进行优化设计。The key points of the scheme of the present invention are as follows: 1) Design a squirrel-cage shunt structure suitable for high-voltage direct current measurement by analyzing the characteristics of the shunt; 2) Design the outer integral Rogowski coil structure by analyzing the measurement principle of the Rogowski coil and the key manufacturing process ;③ Combine the designed shunt, Rogowski coil and conductive connection part into a primary current sensor, and optimize its structure by analyzing the influence of temperature rise, external magnetic field interference, stress influence, outdoor protection and other factors.
本发明的特点在于：通过“鼠笼型分流器+外积分式罗氏线圈”技术测量电流量，分流器测直流，罗氏线圈测谐波，软铜连接吸收应力影响，铜铝过渡材料的使用，软铜连接吸收应力。The characteristics of the present invention are: the current is measured by the technology of "squirrel-cage shunt + external integral Rogowski coil", the shunt measures DC, the Rogowski coil measures harmonics, the soft copper connection absorbs the influence of stress, and the use of copper-aluminum transition materials, Soft copper connections absorb stress.
本发明所产生的有益效果：The beneficial effects produced by the present invention:
本发明的适用于高压直流系统测量用的一次电流传感器结构，具有输出精度高、干扰能力强、结构简单、体积小、重量轻、制造成本低等显著优势。The primary current sensor structure of the present invention suitable for measuring high-voltage direct current systems has significant advantages such as high output precision, strong interference capability, simple structure, small volume, light weight, and low manufacturing cost.
一次电流传感器基本结构为两端采用铝制管母，分流器连接左侧管母和软铜，软铜的另一端连接右侧管母，穿心式罗氏线圈套在远离分流器一端的铝制管母上。基于“鼠笼型分流器+外积分式罗氏线圈”的测量技术，提高了直流测量的抗外磁场干扰能力、抗饱和能力，提升了谐波的测量精度。分流器采用鼠笼型结构的锰铜电阻制造，结构简单，自然冷却条件下散热性能良好，对故障时的谐波集肤效应有较好的抑制作用；罗氏线圈采用外积分式，有效避免了故障电流情况下的磁饱和现象，具有良好的频响特性；中心引出接线的方式有效避免了高压侧磁场对弱电信号的干扰；软铜连接的方式很好的吸收了分流器温升膨胀应力带来的测量误差，提高直流测量精度；铜铝过渡材料的使用有效避免了铜铝结合面的电化学腐蚀。优化后的一次电流传感器结构设计，具有稳定的高精度的输出和良好的稳定性，通过试验其直流输出精度达0.2级，谐波电流输出精度达1级，满足高压直流系统电流量的测量要求。The basic structure of the primary current sensor is that both ends are made of aluminum pipe mother, the shunt is connected to the left pipe mother and soft copper, the other end of the soft copper is connected to the right pipe mother, and the through-hole Rogowski coil is sleeved on the aluminum pipe at the end far away from the shunt. Enter Guanmu. Based on the measurement technology of "squirrel cage shunt + external integrating Rogowski coil", the anti-interference ability and anti-saturation ability of DC measurement are improved, and the measurement accuracy of harmonics is improved. The shunt is made of manganese-copper resistor with squirrel-cage structure, which has a simple structure, good heat dissipation performance under natural cooling conditions, and has a good inhibitory effect on harmonic skin effect during faults; the Rogowski coil adopts an external integral type, which effectively avoids The magnetic saturation phenomenon in the case of fault current has good frequency response characteristics; the way of the central lead-out wiring effectively avoids the interference of the high-voltage side magnetic field on the weak current signal; the way of soft copper connection well absorbs the temperature rise and expansion stress band of the shunt To reduce the measurement error and improve the accuracy of DC measurement; the use of copper-aluminum transition material effectively avoids the electrochemical corrosion of the copper-aluminum joint surface. The optimized primary current sensor structure design has stable high-precision output and good stability. Through the test, its DC output accuracy reaches 0.2 grades, and its harmonic current output accuracy reaches 1 grade, which meets the current measurement requirements of high-voltage DC systems. .
附图说明Description of drawings
图1为鼠笼型分流器结构图；Figure 1 is a structural diagram of a squirrel-cage shunt;
图2 分流器信号线的中心引出接线方式示意图；Figure 2 Schematic diagram of the center lead-out wiring method of the shunt signal line;
图3为罗氏线圈结构示意；Figure 3 is a schematic diagram of the Rogowski coil structure;
图4为一次电流传感器剖面图。Figure 4 is a cross-sectional view of a current sensor.
具体实施方式Detailed ways
下面结合附图对本发明作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
如图1所示，本发明的直流测量元为锰铜电阻制成的分流器，其具有良好温度特性，通过电阻分压原理测直流。本发明的分流器1A设计为4端电阻，其电位端输出电压与一次电流成正比，结构为鼠笼型：两端为紫铜盘1，中间为多根实心锰铜电阻棒2。一次电流从两端铜盘1上的铜盘电流输入端3接入，二次输出电压从两端铜盘1外侧靠近圆心处的电位引出端4引出，其中正极性端的信号线由中心孔5引出。As shown in Figure 1, the DC measuring element of the present invention is a shunt made of manganese copper resistance, which has good temperature characteristics and measures DC through the principle of resistance voltage division. The
鼠笼型分流器具有以下优点：①散热面积大，散热效果好；②有效消除故障情况下谐波电流的集肤效应；③适合水平方向安装，既减小了散热不均引起的热电势误差，又便于串联到一次导体回路中；④电感小，阶跃响应良好。The squirrel-cage shunt has the following advantages: ① large heat dissipation area and good heat dissipation effect; ② effectively eliminate the skin effect of harmonic current under fault conditions; ③ suitable for horizontal installation, which not only reduces the thermoelectric potential error caused by uneven heat dissipation , and it is convenient to be connected in series to the primary conductor loop; ④ small inductance and good step response.
由于互感器应用场合是户外高电压大电流环境中，现场的电磁干扰较为严重，为了减小交变磁场对测量精度的影响。采取了以下措施：分流器信号线采用屏蔽双绞线，屏蔽层与一次导体等电位；对易受外磁场干扰的电位引出端4两端的裸露信号线部分做特殊处理，采用中心引出的接线方式。Since the transformer is applied in an outdoor high-voltage and high-current environment, the electromagnetic interference on site is relatively serious, in order to reduce the influence of the alternating magnetic field on the measurement accuracy. The following measures have been taken: the signal line of the shunt adopts a shielded twisted pair, and the shielding layer is at the same potential as the primary conductor; the exposed signal line at both ends of the potential lead-out terminal 4 that is susceptible to external magnetic field interference is specially treated, and the wiring method of the center lead is adopted .
中心引出的接线方式如图2所示：在分流器中心轴增加一段单端绝缘的走线铜管15，为防止分流器短路，其靠近分流器正极性端P1的端口通过聚四氟乙烯绝缘套管13与分流器铜盘1绝缘，屏蔽双绞线19的红色芯线11穿过走线铜管15连接到分流器正极性端P1，屏蔽双绞线19的黑色芯线17及屏蔽层18连接到分流器的负极性端P2；为防止信号线老化失去绝缘，走线铜管15中的信号线部分用黄蜡套管14包裹，其两端的出线孔位置用环氧树脂12、16覆盖。这种中心引出信号线的接线方式可消除交变磁场对信号线的影响，大大提高分流器的抗干扰性。The wiring method drawn from the center is shown in Figure 2: add a section of single-ended insulated
如图3所示，本发明的谐波测量元为罗氏线圈2A，由漆包线均匀绕制在环形骨架上制成，骨架采用非铁磁性材料，其相对磁导率与空气中的相对磁导率相同，这是空心线圈有别于传统铁心式线圈的一个显著特征。As shown in Figure 3, the harmonic measuring element of the present invention is a
由法拉第电磁感应定律可知，当穿过一定面积的线圈的磁通量发生变化时，该线圈上会感应到一定大小的电压，该电压的方向与磁通量的变化的方向有关，该感应电压电压的大小为dΦ/dt。以图2所示的结构罗氏线圈为例，其骨架截面为矩形，单匝线圈上的磁通量的和可以用数学表达式表示为：According to Faraday's law of electromagnetic induction, when the magnetic flux passing through a coil with a certain area changes, a certain voltage will be induced on the coil, and the direction of the voltage is related to the direction of the change of the magnetic flux. The magnitude of the induced voltage is dΦ/dt. Taking the structure Rogowski coil shown in Figure 2 as an example, its skeleton cross-section is rectangular, and the sum of the magnetic flux on the single-turn coil can be expressed as follows:
上式中a和b为骨架的内半径与外半径；ω为罗氏线圈的厚度；Bx为距离中心轴为x的任意一点的磁感应强度；μ0为真空中的磁导率。In the above formula, a and b are the inner radius and outer radius of the skeleton; ω is the thickness of the Rogowski coil; Bx is the magnetic induction at any point x from the central axis; μ0 is the magnetic permeability in vacuum.
罗氏线圈的绕线匝数为N，则罗氏线圈的感应电压e可用下式表示，式中M被称作罗氏线圈的互感系数。The number of turns of the Rogowski coil is N, and the induced voltage e of the Rogowski coil can be expressed by the following formula, where M is called the mutual inductance coefficient of the Rogowski coil.
通过对罗氏线圈输出电压的积分就可以还原被测电流信号i(t)。The measured current signal i(t) can be restored by integrating the output voltage of the Rogowski coil.
从上式可知，感应电压e只跟被测直流电流的谐波分量有关，而与直流分量无关（直流分量的dI/dt为0），即被测电流中占比例较小的谐波分量，可以通过设计罗氏线圈传感器的结构参数，获得较大的感应系数，而不受直流分量的影响。这个突出的优点，解决了传统互感器工作点与直流分量大小有关，从而无法测量直流大电流中少量谐波的难题。It can be seen from the above formula that the induced voltage e is only related to the harmonic component of the measured DC current, but has nothing to do with the DC component (dI/dt of the DC component is 0), that is, the harmonic component that accounts for a small proportion of the measured current, By designing the structural parameters of the Rogowski coil sensor, a larger inductance can be obtained without being affected by the DC component. This outstanding advantage solves the problem that the operating point of the traditional transformer is related to the size of the DC component, so it is impossible to measure a small amount of harmonics in the large DC current.
罗氏线圈体积小，结构简单，适合电力系统测量长期可靠的要求；同时在罗氏线圈中无任何铁磁物质，动态特性好；电子式互感器通过高压侧转换电路将其二次输出转换为光信号，对于罗氏线圈来说就不存在复杂的高压绝缘设计问题；以上优点，使罗氏线圈非常适合作为高压直流谐波电流传感元件。The Rogowski coil is small in size and simple in structure, which is suitable for the long-term and reliable requirements of power system measurement; at the same time, there is no ferromagnetic substance in the Rogowski coil, and the dynamic characteristics are good; the electronic transformer converts its secondary output into an optical signal through the high-voltage side conversion circuit , there is no complicated high-voltage insulation design problem for Rogowski coils; the above advantages make Rogowski coils very suitable as high-voltage DC harmonic current sensing elements.
如图4所示，本发明的一次电流传感器结构包括：一个分流器1A、一个罗氏线圈2A、一套用来固定线圈的卡箍33、两个铝制管型母线34、六根不锈钢连接条35、十二根软铜连接片36、一个不锈钢外罩37、两个铝制管型母线连接用的法兰盘38、两个铝制均压环39、连接分流器1A和罗氏线圈2A的两根信号线310、不锈钢波纹管311、外罩固定螺钉312以及其他固定用螺钉、垫片等零件。As shown in Figure 4, the structure of the primary current sensor of the present invention includes: a
导电连接部分的基本结构为：两端采用铝制管型母线34，左侧管型母线34与左侧法兰盘38焊接而成，左侧法兰盘38通过螺栓与软铜连接片36左侧柔性连接，软铜连接片36的右侧通过螺栓与分流器1A的左侧铜盘1柔性连接，分流器1A右侧铜盘1通过螺栓与右侧法兰盘管38刚性连接，右侧法兰盘38与右侧管型母线34通过焊接固定，两端的法兰盘38通过不锈钢连接条35刚性连接。The basic structure of the conductive connection part is as follows: both ends are made of
具体连接方式如下：The specific connection method is as follows:
1）传感器的管型母线34。为便于传感器的现场安装，传感器对外连接的这部分导体采用直流系统中常用的铝合金管型母线；为保证其通流能力和增强热交换能力，本实施例中管型母线内径设计为180mm，外径设计为200mm；为保证足够的机械强度，管型母线现场安装时须使用卡箍、管内焊接衬管的方式与直流系统母线连接。1) The
2）管型母线34与法兰盘38。为保证传感器各导电部分的可靠连接，每段管型母线34的接头处焊接一个法兰盘38，用于连接、固定分流器1A、软铜连接片36以及不锈钢连接条35等；为保证焊接处导电特性优于管型母线34本身，防止连接处接触电阻过大导致传感器温升加剧，管型母线34与法兰盘38的结合面采用了多层氩弧焊接的工艺。2)
3）法兰盘38与分流器1A的连接。分流器1A为铜材质，法兰盘38为铝材质，这两种材料直接导电连接会产生电化学腐蚀效应，对导电连接的可靠性及寿命产生较大影响。为此，须在两者结合面增加铜铝过渡材料；另外为防止铝氧化及减少接触电阻带来的发热现象，在安装过渡材料时，铝表面也须采用抛光并涂导电膏的措施。3) The connection between the
4）法兰盘38与软铜连接片36的连接。法兰盘38与软铜连接片36之间也需增加铜铝过渡材料避免电化学腐蚀；另外为保证此部分连接通流能力，两者的结合面须大于2倍管型母线的截面积。4) The connection between the
5）软铜连接片36与分流器1A。两者均为铜材质，可直接连接，总接触面积和法兰盘38连接时相同。5) Soft
下面列出了提高一次电流传感器测量精度的几处关键的结构设计：Several key structural designs to improve the measurement accuracy of the primary current sensor are listed below:
1）为了有效防止锰铜电阻棒2应温升产生内应力，造成阻值变化，影响测量精度，分流器1A采用一端固定，另一端用软铜连接片36连接的方式。具体结构形式如图4：两侧的法兰盘38通过六根不锈钢连接条35构成一个刚性框架；分流器1A右侧通过螺栓固定于右侧法兰盘38，其左侧悬空；在左侧法兰盘38和分流器1A的左端面之间安装十二根软铜连接片36；这样当分流器1A由于温升产生水平方向的膨胀应力时，软铜连接片36可通过在刚性框架内的自由伸缩来吸收此应力。1) In order to effectively prevent the internal stress of the
2）为减少垂直向下的重力对锰铜电阻棒2的影响，在最下方的连接条35上设计凸台来支撑分流器1A的向下悬空端，消除重力影响。2) In order to reduce the influence of vertical downward gravity on the manganese
3）为提高谐波测量精度，使一次电流的中心穿过罗氏线圈2A，专门设计了卡箍33将铝壳封装的罗氏线圈2A固定在远离分流器1A一端的管型母线34上。3) In order to improve the harmonic measurement accuracy and make the center of the primary current pass through the
4）为防止信号线受损，由屏蔽双绞线制成的分流器1A和罗氏线圈2A的信号线310通过不锈钢螺纹管311向外引出。4) In order to prevent the signal wires from being damaged, the
5）为防止长期户外运行遭受外应力的破坏，传感器还设计了不锈钢外罩37，并通过螺栓312与法兰盘38固定。5) In order to prevent long-term outdoor operation from being damaged by external stress, the sensor is also designed with a
6）为防止处于高压侧局部场强过大造成传感器击穿，传感器两端设计了铝制均压环39，并通过螺丝固定于不锈钢外罩7上。6) In order to prevent sensor breakdown caused by excessive local field strength on the high-voltage side, aluminum pressure equalizing rings 39 are designed at both ends of the sensor, and are fixed on the stainless steel cover 7 by screws.
按照以上技术方案设计的高压直流输电系统一次电流传感器直流测量精度可达0.2级，谐波测量精度可达1级。The DC measurement accuracy of the primary current sensor of the HVDC transmission system designed according to the above technical scheme can reach 0.2 level, and the harmonic measurement accuracy can reach 1 level.
以上实施例仅为说明本发明的技术思想，不能以此限定本发明的保护范围，凡事按照本发明提出的技术思想，在技术方案基础上所做的任何改动，均落入本发明保护范围之内。 The above embodiments are only to illustrate the technical ideas of the present invention, and cannot limit the protection scope of the present invention with this. Everything according to the technical ideas proposed in the present invention, and any changes made on the basis of the technical solutions, all fall within the protection scope of the present invention. Inside. the
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110367909.7ACN102445582B (en) | 2011-11-18 | 2011-11-18 | Primary current sensor structure suitable for high-voltage direct current measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110367909.7ACN102445582B (en) | 2011-11-18 | 2011-11-18 | Primary current sensor structure suitable for high-voltage direct current measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102445582Atrue CN102445582A (en) | 2012-05-09 |
| CN102445582B CN102445582B (en) | 2014-07-16 |
Family
ID=46008280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110367909.7AActiveCN102445582B (en) | 2011-11-18 | 2011-11-18 | Primary current sensor structure suitable for high-voltage direct current measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102445582B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104854460A (en)* | 2012-11-16 | 2015-08-19 | 阿尔斯通技术有限公司 | Very high voltage dc line voltage sensor |
| CN103257260B (en)* | 2012-10-24 | 2017-02-08 | 惠州市惠之声实业有限公司 | Method for resisting alternating magnetic field interference and sample resistor |
| CN106526272A (en)* | 2016-09-24 | 2017-03-22 | 北京东方计量测试研究所 | Novel precision shunt |
| CN107121574A (en)* | 2017-05-11 | 2017-09-01 | 南京南瑞继保电气有限公司 | A kind of DC current current divider |
| CN109782062A (en)* | 2017-11-10 | 2019-05-21 | 许继集团有限公司 | A method for optimizing the harmonic measurement characteristics of a Rogowski coil type electronic current transformer |
| CN109900946A (en)* | 2019-03-26 | 2019-06-18 | 山东联合电力技术有限公司 | A kind of shell mechanism of the electronic current mutual inductor based on electric resistance partial pressure |
| CN110568364A (en)* | 2018-06-06 | 2019-12-13 | 矢崎总业株式会社 | Sensor protector |
| CN110895289A (en)* | 2018-09-12 | 2020-03-20 | 西安西电高压开关有限责任公司 | Current measuring device |
| CN112748274A (en)* | 2019-10-31 | 2021-05-04 | 西安西电高压开关有限责任公司 | Current measuring device |
| CN114556114A (en)* | 2019-10-11 | 2022-05-27 | Koa株式会社 | Shunt Resistor Module |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6854143B2 (en)* | 2017-02-15 | 2021-04-07 | Koa株式会社 | Current detector using shunt resistor and shunt resistor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201282028Y (en)* | 2008-09-12 | 2009-07-29 | 中国西电电气股份有限公司 | Electronic type high voltage DC current transformer |
| CN101770858A (en)* | 2008-12-30 | 2010-07-07 | 贾丹平 | Optical fiber current transformer |
| CN102165323A (en)* | 2008-07-23 | 2011-08-24 | 马克西姆综合产品公司 | Isolated current sensor |
| CN202041573U (en)* | 2011-03-18 | 2011-11-16 | 武汉大学 | A pulse current sensor |
- 2011
- 2011-11-18CNCN201110367909.7Apatent/CN102445582B/enactiveActive
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102165323A (en)* | 2008-07-23 | 2011-08-24 | 马克西姆综合产品公司 | Isolated current sensor |
| CN201282028Y (en)* | 2008-09-12 | 2009-07-29 | 中国西电电气股份有限公司 | Electronic type high voltage DC current transformer |
| CN101770858A (en)* | 2008-12-30 | 2010-07-07 | 贾丹平 | Optical fiber current transformer |
| CN202041573U (en)* | 2011-03-18 | 2011-11-16 | 武汉大学 | A pulse current sensor |
Non-Patent Citations (1)
| Title |
|---|
| 徐雁: "光电直流电流及谐波电流互感器的研究", 《中国优秀博硕士学位论文全文数据库（博士） 工程科技II辑》* |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257260B (en)* | 2012-10-24 | 2017-02-08 | 惠州市惠之声实业有限公司 | Method for resisting alternating magnetic field interference and sample resistor |
| CN104854460A (en)* | 2012-11-16 | 2015-08-19 | 阿尔斯通技术有限公司 | Very high voltage dc line voltage sensor |
| CN104854460B (en)* | 2012-11-16 | 2018-03-30 | 通用电气技术有限公司 | Super-pressure DC line voltage sensors |
| CN106526272A (en)* | 2016-09-24 | 2017-03-22 | 北京东方计量测试研究所 | Novel precision shunt |
| CN106526272B (en)* | 2016-09-24 | 2020-02-21 | 北京东方计量测试研究所 | Precise shunt |
| CN107121574A (en)* | 2017-05-11 | 2017-09-01 | 南京南瑞继保电气有限公司 | A kind of DC current current divider |
| CN109782062A (en)* | 2017-11-10 | 2019-05-21 | 许继集团有限公司 | A method for optimizing the harmonic measurement characteristics of a Rogowski coil type electronic current transformer |
| CN110568364B (en)* | 2018-06-06 | 2021-11-26 | 矢崎总业株式会社 | Sensor protector |
| CN110568364A (en)* | 2018-06-06 | 2019-12-13 | 矢崎总业株式会社 | Sensor protector |
| CN110895289A (en)* | 2018-09-12 | 2020-03-20 | 西安西电高压开关有限责任公司 | Current measuring device |
| CN109900946A (en)* | 2019-03-26 | 2019-06-18 | 山东联合电力技术有限公司 | A kind of shell mechanism of the electronic current mutual inductor based on electric resistance partial pressure |
| CN114556114A (en)* | 2019-10-11 | 2022-05-27 | Koa株式会社 | Shunt Resistor Module |
| CN112748274A (en)* | 2019-10-31 | 2021-05-04 | 西安西电高压开关有限责任公司 | Current measuring device |
| CN112748274B (en)* | 2019-10-31 | 2023-05-16 | 西安西电高压开关有限责任公司 | Current measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102445582B (en) | 2014-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102445582A (en) | Primary current sensor structure suitable for high-voltage direct current measurement | |
| CN201514851U (en) | Outdoor self-excited source three-phase combined electronic transducer metering device | |
| CN102436897A (en) | Flexible Rogowski coil used for detecting direct-current system short-circuit current and method for designing same | |
| CN104078220A (en) | Inductor and resistor compound superconducting reactor | |
| CN201340797Y (en) | Large current transformer used for generator outlet | |
| CN106324539A (en) | High-precision current comparator | |
| CN111856112A (en) | High-precision zero-sequence current sensor based on current synthesis and precise magneto-potential conversion | |
| CN1570655A (en) | Double detection type current sensor | |
| CN115754585A (en) | High-frequency current sensing acquisition unit adopting demagnetization technology | |
| CN105374507B (en) | Arc-shaped iron core coil current transformer and preparation method thereof | |
| CN110836987B (en) | Manganese-copper shunt of three-phase intelligent electric energy meter and application thereof | |
| Zhao et al. | An online monitoring method for DC busbar electrolytic capacitor bank based on optimized Rogowski coil current sampling | |
| CN205159031U (en) | Arc core coil current transformer | |
| CN101707127A (en) | Oil-immersed inverted current transformer with function of insulation online monitoring | |
| CN209707576U (en) | A kind of residual voltage sensor based on capacitance partial pressure | |
| CN209513902U (en) | A kind of digital zero sequence current mutual inductor of on-pole switch | |
| CN109884371B (en) | Anti-skin-effect large-current measuring device | |
| CN201036148Y (en) | Helix tube type aircore coil current sensor | |
| CN209841950U (en) | Depth fusion current sensor | |
| CN201282028Y (en) | Electronic type high voltage DC current transformer | |
| CN112071578A (en) | Zero sequence current mutual inductance device | |
| CN2670951Y (en) | Current sensor | |
| CN100485396C (en) | Method for measuring high voltage by current method and its device | |
| CN207798899U (en) | A kind of current sensor and monitoring system | |
| CN216387192U (en) | Low-voltage alternating current acquisition module for data center |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder | Address after:High road high tech Development Zone Nanjing city Jiangsu province 210061 No. 20 Co-patentee after:NARI Group Corp. Patentee after:NARI TECHNOLOGY Co.,Ltd. Address before:High road high tech Development Zone Nanjing city Jiangsu province 210061 No. 20 Co-patentee before:NARI Group CORPORATION STATE GRID ELECTRIC POWER INSTITUTE Patentee before:NARI TECHNOLOGY Co.,Ltd. |