WO2024124669A1 - Lc compatible voltage sensor - Google Patents

Abstract

An LC compatible voltage sensor, which relates to the field of voltage sensors. Parallel openings (25) are provided on both sides of a high-voltage circuit board (6); an output end (23) of the high-voltage circuit board (6) is connected to a high-voltage outlet terminal (1); high-voltage capacitors (5) are fixed on the circuit board by means of the parallel openings (25); one end of a low-voltage capacitor is connected to a low-voltage output end of the high-voltage circuit board (6), one end of a transient-voltage-suppression diode and a voltage follower, and the other end of the low-voltage capacitor is connected to the other end of the transient-voltage-suppression diode, the voltage follower and a primary side of a transformer (14), the other end of the low-voltage capacitor being grounded; the high-voltage circuit board (6), the high-voltage capacitors (5), the low-voltage capacitor, the transient-voltage-suppression diode, the voltage follower and the transformer (14) are all arranged inside a housing; the high-voltage outlet terminal (1) passes through the housing; an air valve (12) is provided on the housing; and an insulating gas is introduced into the interior of the housing by means of the air valve (12). The reliability of the voltage sensor can be improved, and maintenance and repair are facilitated.

Description

一种LC兼容型电压传感器An LC compatible voltage sensor

相关申请的交叉引用CROSS-REFERENCE TO RELATED APPLICATIONS

本申请要求于2022年12月12日提交于中国国家知识产权局的申请号为202211591119.1、名称为“一种LC兼容型电压传感器”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims priority to a Chinese patent application with application number 202211591119.1 filed with the State Intellectual Property Office of China on December 12, 2022, entitled “A LC-compatible voltage sensor”, the entire contents of which are incorporated by reference into this application.

技术领域Technical Field

本公开涉及电压传感器领域，特别是涉及一种LC兼容型电压传感器。The present disclosure relates to the field of voltage sensors, and in particular to an LC compatible voltage sensor.

背景技术Background technique

目前电压传感器中高压电容采用多只低压电容芯组外串焊接而成，可靠性很难控制。外串焊接后的芯组放在普通塑壳中，填充环氧树脂，这种半密封方式对外绝缘性能较低；线路板虽然带有缝隙，但缝隙中没有绝缘插板，完全靠空气间隙隔离，因此表面绝缘水平较低，必须采用环氧树脂填充；低压信号输出电路中，有的仅经低压电容直接输出，没有负载隔离，无法排除负载的影响；有的经低压电容分压后，直接并联微型变压器，因而存在***LC谐振风险；由于高压电容和线路板结构上缺陷，电容在线路板上组装后，都必须要采用环氧树脂浇注成型。这种实心包封方式，既要消耗大量环氧树脂，又无法返修生产过程中或运行中可能出现的问题；当产品运行年限期满回收处理时：如果直接焚烧将产生大量有害气体，破坏生态环境；如果支解，由于固体环氧树脂很硬，则需要先粉碎，再重新筛选分类，这就势必造成费时又费力。At present, the high-voltage capacitors in voltage sensors are made of multiple low-voltage capacitor core groups welded in series, and the reliability is difficult to control. The core group after external series welding is placed in an ordinary plastic shell and filled with epoxy resin. This semi-sealed method has low external insulation performance; although the circuit board has gaps, there is no insulating plug in the gap, and it is completely isolated by air gaps, so the surface insulation level is low and epoxy resin must be used for filling; in the low-voltage signal output circuit, some are directly output only through low-voltage capacitors, without load isolation, and the influence of the load cannot be eliminated; some are directly connected to micro-transformers in parallel after voltage division by low-voltage capacitors, so there is a risk of system LC resonance; due to structural defects in high-voltage capacitors and circuit boards, capacitors must be cast with epoxy resin after being assembled on the circuit board. This solid encapsulation method consumes a lot of epoxy resin and cannot repair problems that may occur during production or operation; when the product expires and is recycled: if it is directly incinerated, a large amount of harmful gases will be generated, which will damage the ecological environment; if it is dismembered, because the solid epoxy resin is very hard, it needs to be crushed first and then re-screened and classified, which is bound to be time-consuming and laborious.

发明内容Summary of the invention

为了解决相关技术中的缺陷，本公开的目的是提供一种LC兼容型电压传感器，能够提高电压传感器的可靠性，便于维护和返修。In order to solve the defects in the related art, the purpose of the present disclosure is to provide an LC compatible voltage sensor, which can improve the reliability of the voltage sensor and facilitate maintenance and repair.

为实现上述目的，本公开提供了如下方案：To achieve the above objectives, the present disclosure provides the following solutions:

一种LC兼容型电压传感器，可以包括：高压线路板、高压电容、高压出线端子、低压电容、瞬态二极管、电压跟随器、变压器、外壳和气阀；An LC compatible voltage sensor may include: a high voltage circuit board, a high voltage capacitor, a high voltage outlet terminal, a low voltage capacitor, a transient diode, a voltage follower, a transformer, a housing and a gas valve;

所述高压线路板的两侧均设置有相互平行的开口；所述高压线路板的输出端与所述高压出线端子连接；所述高压电容通过所述相互平行的开口固定在所述线路板上；Both sides of the high-voltage circuit board are provided with openings parallel to each other; the output end of the high-voltage circuit board is connected to the high-voltage output terminal; the high-voltage capacitor is fixed on the circuit board through the openings parallel to each other;

所述低压电容的一端分别与所述高压线路板的低压输出端、所述瞬态二极管的一端和所述电压跟随器连接；所述低压电容的另一端分别与所述瞬态二极管的另一端、所述电压跟随器和所述变压器的一次侧连接，且所述低压电容的另一端端接地；One end of the low-voltage capacitor is respectively connected to the low-voltage output end of the high-voltage circuit board, one end of the transient diode and the voltage follower; the other end of the low-voltage capacitor is respectively connected to the other end of the transient diode, the voltage follower and the primary side of the transformer, and the other end of the low-voltage capacitor is grounded;

所述高压线路板、高压电容、低压电容、瞬态二极管、电压跟随器和变压器均设置在所述外壳的内部；所述高压出线端子贯穿所述外壳；The high-voltage circuit board, high-voltage capacitor, low-voltage capacitor, transient diode, voltage follower and transformer are all arranged inside the housing; the high-voltage outlet terminal runs through the housing;

所述气阀设置在所述外壳上；绝缘气体通过所述气阀充入所述外壳的内部。The gas valve is arranged on the shell; the insulating gas is filled into the interior of the shell through the gas valve.

可选地，所述外壳包括硅橡胶套、底盖和内壳； Optionally, the outer shell includes a silicone rubber sleeve, a bottom cover and an inner shell;

所述硅橡胶套套设在所述内壳的外壁上；The silicone rubber sleeve is sleeved on the outer wall of the inner shell;

所述底盖固定在所述内壳的开口处；所述底盖与所述内壳可以构成封闭的空间；The bottom cover is fixed at the opening of the inner shell; the bottom cover and the inner shell can form a closed space;

所述高压线路板、高压电容、低压电容、瞬态二极管、电压跟随器和变压器可以均设置在所述封闭的空间中；所述气阀设置在所述底盖上并连通所述封闭的空间和所述外壳的外部。The high-voltage circuit board, high-voltage capacitor, low-voltage capacitor, transient diode, voltage follower and transformer can all be arranged in the closed space; the gas valve is arranged on the bottom cover and connects the closed space and the outside of the shell.

可选地，所述气阀可以为微型气阀，所述微型气阀上端设计有通气小孔，供抽真空和充入氮气之用，所述小孔下端设计有带螺纹的大孔，且小所述小孔和所述大孔相通。Optionally, the air valve can be a micro air valve, the upper end of the micro air valve is designed with a ventilation hole for vacuuming and filling with nitrogen, the lower end of the small hole is designed with a large hole with threads, and the small hole is connected to the large hole.

可选地，所述底盖上可以设置有定位凹槽；所述高压线路板的一端通过所述凹槽固定；所述高压线路板的另一端与所述高压出线端子固定连接。Optionally, a positioning groove may be provided on the bottom cover; one end of the high-voltage circuit board is fixed by the groove; and the other end of the high-voltage circuit board is fixedly connected to the high-voltage outlet terminal.

可选地，所述电压传感器还可以包括高压端子硅橡胶连接线，所述高压端子硅橡胶连接线与所述高压出线端子连接，并且所述高压端子硅橡胶连接线将所述高压出线端子密封。Optionally, the voltage sensor may further include a high-voltage terminal silicon rubber connecting wire, which is connected to the high-voltage output terminal and seals the high-voltage output terminal.

可选地，所述电压传感器还可以包括接线端子；所述低压端子包括所述电压跟随器的工作电源进线端子、接地端子和所述变压器的二次侧端子；所述接线端子设置在所述底盖上。Optionally, the voltage sensor may further include wiring terminals; the low-voltage terminals include a working power supply input terminal of the voltage follower, a ground terminal and a secondary terminal of the transformer; and the wiring terminals are arranged on the bottom cover.

可选地，所述变压器可以为微型变压器。Optionally, the transformer may be a micro transformer.

可选地，所述变压器的二次侧端子可以上下设计有螺纹孔，供内部接线和外部出线之用，所述变压器的二次侧端子中间设计有凹槽，以增强所述变压器的二次侧端子和所述底盖结合力。Optionally, the secondary terminal of the transformer may be designed with threaded holes at the top and bottom for internal wiring and external wiring, and a groove is designed in the middle of the secondary terminal of the transformer to enhance the bonding strength between the secondary terminal of the transformer and the bottom cover.

可选地，所述高压电容可以为薄膜电容。Optionally, the high-voltage capacitor may be a thin-film capacitor.

可选地，所述高压电容可以采用内六串薄膜结构。Optionally, the high-voltage capacitor may adopt an inner six-series thin-film structure.

可选地，所述电压传感器还可以包括高压电容外壳；Optionally, the voltage sensor may further include a high-voltage capacitor housing;

所述高压电容设置在所述高压电容外壳内；The high-voltage capacitor is arranged in the high-voltage capacitor housing;

所述外壳的两侧设置有绝缘插板；所述绝缘插板***对应的所述相互平行的开口；Insulating plugs are provided on both sides of the shell; the insulating plugs are inserted into the corresponding parallel openings;

可选地，所述相互平行的开口之间的间距可以一致。Optionally, the intervals between the mutually parallel openings may be consistent.

可选地，所述电压传感器还可以包括低压线路板；Optionally, the voltage sensor may further include a low voltage circuit board;

所述低压电容、瞬态二极管和电压跟随器可以固定连接在所述低压线路板上。The low-voltage capacitor, transient diode and voltage follower can be fixedly connected to the low-voltage circuit board.

可选地，所述电压传感器还可以包括低压线路盒，所述低压线路板设置在所述低压线路盒内。Optionally, the voltage sensor may further include a low-voltage circuit box, and the low-voltage circuit board is arranged in the low-voltage circuit box.

可选地，所述低压线路板四角可以具有低压线路板安装孔，便于使所述低压线路板安装在所述低压线路板盒中。Optionally, the four corners of the low-voltage circuit board may have low-voltage circuit board mounting holes to facilitate the installation of the low-voltage circuit board in the low-voltage circuit board box.

根据本公开提供的具体实施例，本公开公开了以下技术效果：According to the specific embodiments provided by the present disclosure, the present disclosure discloses the following technical effects:

本公开提供的一种LC兼容型电压传感器，包括：高压线路板、高压电容、高压出线端子、低压电容、瞬态二极管、电压跟随器、变压器、外壳和气阀；高压线路板的两侧均设置有相互平行的开口；高压线路板的输出端与高压出线端子连接；高压电容通过相互平行的开口固定在线路板上；低压电容的一端分别与高压线路板的低压输出端、瞬态二极管的一端和电压跟随器连接；低压电容的另一端分别与瞬态二极管的另一端、电压跟随器和变压器的一次侧连接，且低压电容的另一端接地；高压线路板、高压 电容、低压电容、瞬态二极管、电压跟随器和变压器均设置在外壳的内部；高压出线端子贯穿外壳；气阀设置在外壳上；绝缘气体通过气阀充入外壳的内部。本公开通过提高单只高压电容的可靠性，加强相邻电容之间绝缘性能；优化设计高压线路板表面爬电的防范，为提高相邻电容之间的绝缘水平提供条件；高压线路板上电容的合理布局，确保整机的综合性能；低压信号输出电路的过电压保护，负载影响的隔离，LC谐振现象的避免和对后级控制单元的保护；采用绝缘气体进行绝缘，便于维护和返修，避免浪废现象发生，同时便于再回收利用，节约资源，符合环境保护要求，避免环境污染。The present invention provides an LC compatible voltage sensor, comprising: a high-voltage circuit board, a high-voltage capacitor, a high-voltage outlet terminal, a low-voltage capacitor, a transient diode, a voltage follower, a transformer, a housing and a gas valve; both sides of the high-voltage circuit board are provided with openings parallel to each other; the output end of the high-voltage circuit board is connected to the high-voltage outlet terminal; the high-voltage capacitor is fixed on the circuit board through the openings parallel to each other; one end of the low-voltage capacitor is respectively connected to the low-voltage output end of the high-voltage circuit board, one end of the transient diode and the voltage follower; the other end of the low-voltage capacitor is respectively connected to the other end of the transient diode, the voltage follower and the primary side of the transformer, and the other end of the low-voltage capacitor is grounded; the high-voltage circuit board, the high-voltage The capacitor, low-voltage capacitor, transient diode, voltage follower and transformer are all arranged inside the shell; the high-voltage outlet terminal passes through the shell; the gas valve is arranged on the shell; and the insulating gas is filled into the shell through the gas valve. The present invention improves the reliability of a single high-voltage capacitor and strengthens the insulation performance between adjacent capacitors; optimizes the design of the prevention of surface creepage on the high-voltage circuit board to provide conditions for improving the insulation level between adjacent capacitors; the reasonable layout of capacitors on the high-voltage circuit board ensures the comprehensive performance of the whole machine; the overvoltage protection of the low-voltage signal output circuit, the isolation of load influence, the avoidance of LC resonance phenomenon and the protection of the subsequent control unit; the use of insulating gas for insulation is convenient for maintenance and repair, and waste is avoided. At the same time, it is convenient for recycling, saving resources, meeting environmental protection requirements, and avoiding environmental pollution.

附图说明BRIEF DESCRIPTION OF THE DRAWINGS

为了更清楚地说明本公开实施例或相关技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

图1为本公开单相电气原理图；FIG1 is a single-phase electrical schematic diagram of the present disclosure;

图2为三相电气原理图；Figure 2 is a three-phase electrical schematic diagram;

图3为单相成品外形及内部结构图；Figure 3 is a diagram of the appearance and internal structure of a single-phase finished product;

图4为高压电容芯组内部结构图；FIG4 is a diagram showing the internal structure of a high voltage capacitor core group;

图5为高压电容芯组箔膜内六串结构图；Figure 5 is a diagram of the six-string structure of the foil film of the high-voltage capacitor core group;

图6为高压电容外壳结构图；Figure 6 is a structural diagram of a high voltage capacitor housing;

图7为高压电容插壳结构图；Figure 7 is a structural diagram of a high voltage capacitor plug shell;

图8为低压电容芯组金属化膜结构图；FIG8 is a diagram showing the structure of a metallized film of a low voltage capacitor core group;

图9为低压电容外壳结构图；Figure 9 is a structural diagram of a low voltage capacitor housing;

图10为高压线路板设计图；Figure 10 is a design diagram of a high voltage circuit board;

图11为高压电容串联连接设计图；FIG11 is a design diagram of high voltage capacitors connected in series;

图12为高压出线端子设计图；Figure 12 is a design diagram of the high voltage outlet terminal;

图13为高压端子硅橡胶连接线设计图；FIG13 is a design diagram of a high voltage terminal silicone rubber connecting wire;

图14为低压线路板设计图；FIG14 is a design diagram of a low voltage circuit board;

图15为低压线路盒设计图；Figure 15 is a design diagram of a low voltage circuit box;

图16为低压微型变压器铁芯设计图；FIG16 is a design diagram of a low voltage micro transformer core;

图17为低压微型变压器盒设计图；Figure 17 is a design diagram of a low voltage micro transformer box;

图18为低压端子设计图；Figure 18 is a low voltage terminal design diagram;

图19为微型气阀设计图；FIG19 is a design diagram of a micro air valve;

图20为产品外壳设计图；Figure 20 is a product housing design diagram;

图21为外壳硅橡胶套设计图；Figure 21 is a design drawing of the outer shell silicone rubber sleeve;

图22为产品密封件的圆环形密封件设计图； FIG22 is a design diagram of a circular ring seal of a product seal;

图23为产品密封件的底座盒长方形密封件设计图；FIG23 is a rectangular seal design diagram of the base box of the product seal;

图24为产品底盖设计图；Figure 24 is a design drawing of the product bottom cover;

图25为底盖密封件结构图。Figure 25 is a structural diagram of the bottom cover seal.

符号说明：
高压出线端子—1，密封件—2，硅橡胶套—3，内壳—4，高压电容—5，高压线路板—6，定位凹槽
—7，底盖—8，低压端子—9，接地端子—10，电压跟随器的工作电源进线端子—11，气阀—12，安装螺丝—13，变压器—14，低压线路盒—15，MPP膜—16，PP膜—17，铝箔—18，金属蒸镀层—19，绝缘插板—20，安装孔—21，高压电容外壳—22，高压线路板的输出端—23，高压线路板的安装孔—24，相互平行的开口—25，高压电容引线焊接孔—26，环氧树脂板—27，铜箔—28，导线穿孔—29，电容一的一个极板—30，电容一的另一个极板—31，电容一与电容二的连接点—32，电容二的一个极板—33，电容二的另一个极板—34，电容二与电容三的连接点—35，电容三的一个极板—36，电容三的另一个极板—37，电容三与电容四的连接点—38，电容四的一个极板—39，电容四的另一个极板—40，电容四与电容五的连接点—41，电容五的一个极板—42，电容五的另一个极板—43，电容五与电容六的连接点—44，电容六的一个极板—45，电容六的另一个极板—46，高压电容插壳—47，带盖—48，引线出口—49，金属镀层—50，介质—51，留边—52，密封件放置处—53，高压出线端子密封件—54，紫铜线—55，接线端子—56，硅橡胶—57，可封闭高压出线端子拉动方向—58，低压线路板安装孔—59，低压线路板—60，低压线路盒安装孔—61，带螺纹孔的低压线路板固定支架—62，低压线路盒的上盖—63，第一出线孔—64，第二出线孔—65，定位圆柱—66，进线孔—67，第三出线孔—68，气孔—69，圆环形密封件—70，金属圆盘形垫圈—71，螺杆—72。Symbol Description:
High voltage outlet terminal - 1, seal - 2, silicone rubber sleeve - 3, inner shell - 4, high voltage capacitor - 5, high voltage circuit board - 6, positioning groove - 7, bottom cover - 8, low voltage terminal - 9, grounding terminal - 10, working power supply inlet terminal of voltage follower - 11, air valve - 12, mounting screw - 13, transformer - 14, low voltage circuit box - 15, MPP film - 16, PP film - 17, aluminum foil - 18, metal vapor deposition layer - 19, insulating plug - 20, mounting hole - 21, high voltage capacitor shell - 22, high voltage circuit board Output terminal—23, mounting hole of high-voltage circuit board—24, parallel openings—25, welding hole of high-voltage capacitor lead—26, epoxy resin board—27, copper foil—28, wire penetration hole—29, one plate of capacitor one—30, another plate of capacitor one—31, connection point between capacitor one and capacitor two—32, one plate of capacitor two—33, another plate of capacitor two—34, connection point between capacitor two and capacitor three—35, one plate of capacitor three—36, another plate of capacitor three—37, connection point between capacitor three and capacitor four connection point—38, one plate of capacitor 4—39, another plate of capacitor 4—40, connection point between capacitor 4 and capacitor 5—41, one plate of capacitor 5—42, another plate of capacitor 5—43, connection point between capacitor 5 and capacitor 6—44, one plate of capacitor 6—45, another plate of capacitor 6—46, high-voltage capacitor plug-in shell—47, with cover—48, lead outlet—49, metal plating—50, dielectric—51, margin—52, seal placement—53, high-voltage outlet terminal seal—5 4. Copper wire—55. Terminal block—56. Silicone rubber—57. Closable pulling direction of high-voltage outlet terminal—58. Low-voltage circuit board mounting hole—59. Low-voltage circuit board—60. Low-voltage circuit box mounting hole—61. Low-voltage circuit board fixing bracket with threaded holes—62. Upper cover of low-voltage circuit box—63. First outlet hole—64. Second outlet hole—65. Positioning cylinder—66. Inlet hole—67. Third outlet hole—68. Air hole—69. Annular seal—70. Metal disc-shaped gasket—71. Screw—72.

具体实施方式Detailed ways

下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

本公开的目的是提供一种LC兼容型电压传感器，能够提高电压传感器的可靠性，便于维护和返修。The purpose of the present disclosure is to provide an LC compatible voltage sensor, which can improve the reliability of the voltage sensor and facilitate maintenance and repair.

本公开特别适用于10kV和20kV智能配网一二次融合中作为相电压传感器和零序电压传感器，以满足相电压测量和零序电压保护智能化要求。The present disclosure is particularly suitable for use as a phase voltage sensor and a zero-sequence voltage sensor in the primary and secondary integration of 10kV and 20kV intelligent distribution networks to meet the requirements of intelligent phase voltage measurement and zero-sequence voltage protection.

为使本公开的上述目的、特征和优点能够更加明显易懂，下面结合附图和具体实施方式对本公开作进一步详细的说明。In order to make the above-mentioned objects, features and advantages of the present disclosure more obvious and easy to understand, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

本公开提供了一种LC兼容型电压传感器，如图3所示，所述电压传感器可以包括：高压线路板6、高压电容5、高压出线端子1、低压电容、瞬态二极管、电压跟随器、变压器14、外壳和气阀12。The present disclosure provides an LC compatible voltage sensor, as shown in FIG3 , the voltage sensor may include: a high voltage circuit board 6 , a high voltage capacitor 5 , a high voltage outlet terminal 1 , a low voltage capacitor, a transient diode, a voltage follower, a transformer 14 , a housing and a gas valve 12 .

具体地，所述高压电容5可以为薄膜电容且所述高压电容5的数量为15个。单只的高压电容5可以采用内六串薄膜结构，无需外串焊接，如图4所示，高压电容5的结构包括MPP膜16(Metallied  polypropylene film，金属化聚丙烯薄膜)、PP膜17(polypropylene film，聚丙烯薄膜)、铝箔18和金属蒸镀层19；铝箔18和所述金属蒸镀层19分别为高压电容5的两个电极板；具体的，高压电容5为六个容值相同的电容串联构成；内六串薄膜结构为铝箔18中短的一处为电容一的一个极板，与电容一正对的金属蒸镀层19为电容一的另一个极板，串联电容二的一个极板，与电容二的一个极板正对的铝箔18为电容二的另一个极板，串联电容三的一个极板，与电容三的一个极板正对的金属蒸镀层19为电容三的另一个极板，串联电容四的一个极板，与电容四的一个极板正对的铝箔18为电容四的另一个极板，串联电容五的一个极板，与电容五的一个极板正对的金属蒸镀层19为电容五的另一个极板，串联电容六的一个极板，与电容六的一个极板正对的铝箔18为电容六的另一个极板，从而实现了高压电容5内部由六个容值相同的电容串联的结构，提高产品质量的可控性和一致性。如图5所示，电容一的一个极板30与电容一的另一个极板31组成电容一，电容二的一个极板33与电容二的另一个极板34组成电容二，电容一与电容二通过电容一与电容二的连接点32串联，电容三的一个极板36与电容三的另一个极板37组成电容三，电容二与电容三通过电容二与电容三的连接点35串联，电容四的一个极板39与电容四的另一个极板40组成电容四，电容三与电容四通过电容三与电容四的连接点38串联，电容五的一个极板42与电容五的另一个极板43组成电容五，电容四与电容五通过电容四与电容五的连接点41串联，电容六的一个极板45与电容六的另一个极板46组成电容六，电容五与电容六通过电容五与电容六的连接点44串联，电容一与电容二的连接点32、电容三与电容四的连接点—38和电容五与电容六的连接点44为金属蒸镀层19内部直接串联，即“内串”结构，电容二与电容三的连接点35和电容四与电容五的连接点41为铝箔18内部直接串联，即“内串”结构，从而得到内六串结构。MPP膜16的厚度为：8μm-12μm；PP膜17的厚度为：8μm-12μm；铝箔18的厚度为：6μm-7μm。单只高压电容5芯组封装可以采用全密封结构，外壳采用局部边缘外加耳形插片，如图6所示，高压线路板的安装孔24与高压电容外壳22的安装孔21对应固定连接，使得所述高压电容外壳22固定在高压线路板6上；外壳中部加装U形插套，有效隔离相邻电容之间的电位差，提高单只电容的绝缘性能；具体地，本高压电容主体外壳为无盖、可固定、相对两边缘带“耳”形插片式外壳。绝缘插板20为带“耳”形插片，可以一一对应***线路板缝隙即相互平行的开口25中，其中间部分错位重叠8mm～10mm，高出外壳上口部分为10mm～12mm，这样可将线路板表面以“墙体”方式隔离，每只高压电容提供隔离两次，15只电容共以“墙体”方式隔离30次，这样，便加长了线路板表面爬电距离。“耳”形插片两端还超出壳体8mm～10mm，用以隔离相邻高压电容之间有电位差的引线焊接点，防止焊接点之间爬电。安装孔21为高压电容外壳22的安装孔，安装时用绝缘材料做成的螺丝钉通过此孔，可将高压电容5固定在线路板上。高压电容外壳22表示电容外壳为有底，以区别上面为开口无盖。Specifically, the high-voltage capacitor 5 can be a thin-film capacitor and the number of the high-voltage capacitor 5 is 15. A single high-voltage capacitor 5 can adopt an inner six-series thin-film structure without external series welding. As shown in FIG. 4 , the structure of the high-voltage capacitor 5 includes an MPP film 16 (Metallied polypropylene film, metallized polypropylene film), PP film 17 (polypropylene film), aluminum foil 18 and metal vapor-deposited layer 19; the aluminum foil 18 and the metal vapor-deposited layer 19 are two electrode plates of the high-voltage capacitor 5 respectively; specifically, the high-voltage capacitor 5 is composed of six capacitors with the same capacitance connected in series; the inner six-string film structure is that the short part of the aluminum foil 18 is a plate of capacitor one, the metal vapor-deposited layer 19 facing the capacitor one is another plate of capacitor one, a plate of capacitor two in series, the aluminum foil 18 facing a plate of capacitor two is another plate of capacitor two, a plate of capacitor three in series, and the metal vapor-deposited layer 19 facing the capacitor three is another plate of capacitor two. The metal vapor-deposited layer 19 facing one plate is another plate of capacitor three, one plate of capacitor four in series, the aluminum foil 18 facing one plate of capacitor four is another plate of capacitor four, one plate of capacitor five in series, the metal vapor-deposited layer 19 facing one plate of capacitor five is another plate of capacitor five, one plate of capacitor six in series, the aluminum foil 18 facing one plate of capacitor six is another plate of capacitor six, thereby realizing a structure in which six capacitors with the same capacitance are connected in series inside the high-voltage capacitor 5, thereby improving the controllability and consistency of product quality. As shown in FIG5 , a plate 30 of capacitor 1 and another plate 31 of capacitor 1 form capacitor 1, a plate 33 of capacitor 2 and another plate 34 of capacitor 2 form capacitor 2, capacitor 1 and capacitor 2 are connected in series through a connection point 32 between capacitor 1 and capacitor 2, a plate 36 of capacitor 3 and another plate 37 of capacitor 3 form capacitor 3, capacitor 2 and capacitor 3 are connected in series through a connection point 35 between capacitor 2 and capacitor 3, a plate 39 of capacitor 4 and another plate 40 of capacitor 4 form capacitor 4, capacitor 3 and capacitor 4 are connected in series through a connection point 38 between capacitor 3 and capacitor 4, a plate 42 of capacitor 5 and another plate 43 of capacitor 5 are connected in series with each other, The plates 43 form capacitor 5, capacitor 4 and capacitor 5 are connected in series through the connection point 41 between capacitor 4 and capacitor 5, one plate 45 of capacitor 6 and another plate 46 of capacitor 6 form capacitor 6, capacitor 5 and capacitor 6 are connected in series through the connection point 44 between capacitor 5 and capacitor 6, the connection point 32 between capacitor 1 and capacitor 2, the connection point 38 between capacitor 3 and capacitor 4 and the connection point 44 between capacitor 5 and capacitor 6 are directly connected in series inside the metal evaporation layer 19, that is, the "inner series" structure, the connection point 35 between capacitor 2 and capacitor 3 and the connection point 41 between capacitor 4 and capacitor 5 are directly connected in series inside the aluminum foil 18, that is, the "inner series" structure, thereby obtaining an inner six series structure. The thickness of MPP film 16 is: 8μm-12μm; the thickness of PP film 17 is: 8μm-12μm; the thickness of aluminum foil 18 is: 6μm-7μm. The packaging of a single high-voltage capacitor 5-core group can adopt a fully sealed structure, and the shell adopts an ear-shaped plug-in with a local edge. As shown in Figure 6, the mounting hole 24 of the high-voltage circuit board corresponds to the mounting hole 21 of the high-voltage capacitor shell 22, so that the high-voltage capacitor shell 22 is fixed on the high-voltage circuit board 6; a U-shaped plug sleeve is installed in the middle of the shell to effectively isolate the potential difference between adjacent capacitors and improve the insulation performance of a single capacitor; specifically, the main shell of the high-voltage capacitor is a coverless, fixable, and "ear"-shaped plug-in shell with two opposite edges. The insulating plug-in 20 is a plug-in with an "ear" shape, which can be inserted into the gap of the circuit board, that is, the opening 25 parallel to each other, one by one, and the middle part thereof is staggered and overlapped by 8mm to 10mm, and is 10mm to 12mm higher than the upper part of the shell, so that the surface of the circuit board can be isolated in a "wall" manner, and each high-voltage capacitor is isolated twice, and 15 capacitors are isolated 30 times in a "wall" manner, so that the creepage distance of the circuit board surface is lengthened. The two ends of the "ear"-shaped plug also extend beyond the housing by 8mm to 10mm to isolate the lead welding points with potential difference between adjacent high-voltage capacitors to prevent creepage between welding points. The mounting hole 21 is the mounting hole of the high-voltage capacitor housing 22. During installation, a screw made of insulating material passes through this hole to fix the high-voltage capacitor 5 on the circuit board. The high-voltage capacitor housing 22 indicates that the capacitor housing has a bottom to distinguish it from an open top without a cover.

图7为高压电容插壳结构图，如图7所示，高压电容插壳47中，与带盖48的一面正对的一面是打开的。带盖48上有两个引线出口49，高压电容引线从引线出口49穿出，高压电容插壳47的外形尺寸比高压电容外壳22内腔略小，以便配合***高压电容外壳22中，即高压电容插壳47倒扣入高压电容 外壳22中，形成密封状态。FIG7 is a structural diagram of a high-voltage capacitor plug housing. As shown in FIG7 , the side of the high-voltage capacitor plug housing 47 that is opposite to the side with the cover 48 is open. The cover 48 has two lead wire outlets 49, and the high-voltage capacitor leads pass through the lead wire outlets 49. The external dimensions of the high-voltage capacitor plug housing 47 are slightly smaller than the inner cavity of the high-voltage capacitor housing 22, so that it can be inserted into the high-voltage capacitor housing 22, that is, the high-voltage capacitor plug housing 47 is buckled into the high-voltage capacitor. In the housing 22, a sealed state is formed.

进一步地，所述电压传感器还可以包括高压电容外壳22；所述高压电容5设置在所述高压电容外壳22内；所述外壳的两侧设置有绝缘插板20；所述绝缘插板20***对应的所述相互平行的开口25。所述高压电容外壳22固定在所述高压线路板6上后的效果如图11所示。具体地，所述高压电容外壳22的安装孔21所在的一面是打开的。Furthermore, the voltage sensor may further include a high-voltage capacitor housing 22; the high-voltage capacitor 5 is disposed in the high-voltage capacitor housing 22; insulating plugs 20 are disposed on both sides of the housing; the insulating plugs 20 are inserted into the corresponding parallel openings 25. The effect of the high-voltage capacitor housing 22 being fixed on the high-voltage circuit board 6 is shown in FIG11. Specifically, the side of the high-voltage capacitor housing 22 where the mounting hole 21 is located is open.

所述高压线路板6的两侧均设置有相互平行的开口25，用于防止表面爬电；所述相互平行的开口25之间的间距可以一致。所述高压线路板的输出端23与所述高压出线端子1连接；所述高压电容5通过所述相互平行的开口25固定在所述线路板上；具体地，高压线路板6设计制作成带有分层交叉缝隙，便于***绝缘插板20，有效防止表面爬电，克服了必须釆用环氧树脂填充的弊端，便于实现气体绝缘，如图10所示，高压线路板6上还包括高压电容引线焊接孔26，环氧树脂板27，铜箔28和导线穿孔29；所述高压电容引线焊接孔26用于连接高压电容5的引出线；所述环氧树脂板27是PCB板上的一层绝缘层；所述铜箔28是PCB板上的连接线；电压跟随器输出端导线经导线穿孔29穿过连接到微型变压器的输入端。高压电容5在线路板正反面按“弓”字形串联排列连接，按照绝缘实际需要让相邻电容之间留有相等、适合间隙，使得产品内部电场分布均匀，确保整机固体、气体复合绝缘水平，如图11所示。进一步的，高压出线端子1的设计图如图12所示，高压出线端子1的下面部分没有螺纹，供焊接在线路板上之用。中间部分带有“圆盘”，供密封圈从上端***放置在上面，作为密封件放置处53；高压出线端子1的上面部分带有螺纹，作为高压端接线，螺纹部分的顶部设置有凹槽，供防止端子在安装时“跟转打滑”之用。Both sides of the high-voltage circuit board 6 are provided with mutually parallel openings 25 for preventing surface creepage; the spacing between the mutually parallel openings 25 can be consistent. The output end 23 of the high-voltage circuit board is connected to the high-voltage outlet terminal 1; the high-voltage capacitor 5 is fixed on the circuit board through the mutually parallel openings 25; specifically, the high-voltage circuit board 6 is designed and manufactured with layered cross gaps, which is convenient for inserting the insulating plug board 20, effectively preventing surface creepage, overcoming the disadvantage of having to use epoxy resin filling, and facilitating gas insulation. As shown in Figure 10, the high-voltage circuit board 6 also includes a high-voltage capacitor lead welding hole 26, an epoxy resin board 27, a copper foil 28 and a wire through hole 29; the high-voltage capacitor lead welding hole 26 is used to connect the lead wire of the high-voltage capacitor 5; the epoxy resin board 27 is an insulating layer on the PCB board; the copper foil 28 is a connecting wire on the PCB board; the voltage follower output end wire passes through the wire through hole 29 and is connected to the input end of the micro transformer. The high-voltage capacitors 5 are connected in series in a "bow" shape on the front and back sides of the circuit board. According to the actual insulation requirements, equal and appropriate gaps are left between adjacent capacitors to make the internal electric field of the product evenly distributed, ensuring the solid and gas composite insulation level of the whole machine, as shown in Figure 11. Furthermore, the design diagram of the high-voltage outlet terminal 1 is shown in Figure 12. The lower part of the high-voltage outlet terminal 1 has no threads for welding on the circuit board. The middle part has a "disc" for the sealing ring to be inserted from the upper end and placed on it, as a sealing part placement place 53; the upper part of the high-voltage outlet terminal 1 has threads, as a high-voltage terminal connection, and a groove is set on the top of the threaded part to prevent the terminal from "slipping" during installation.

本公开还可以包括高压端子硅橡胶连接线，与所述高压出线端子1连接，并将所述高压出线端子1密封，如图13所示，中间紫铜线55为导体部分。外层硅橡胶57为保护层部分。高压出线端子密封件54为可移动部分，当接线端子56连接到电压传感器高压端后，按照可封闭高压出线端子拉动方向58将其拉下可密封电压传感器主体高压出线端子1。The present disclosure may also include a high-voltage terminal silicone rubber connecting wire, which is connected to the high-voltage outlet terminal 1 and seals the high-voltage outlet terminal 1, as shown in FIG13, and the middle copper wire 55 is the conductor part. The outer silicone rubber 57 is the protective layer part. The high-voltage outlet terminal seal 54 is a movable part. When the terminal 56 is connected to the high-voltage end of the voltage sensor, it is pulled down according to the pull direction 58 of the high-voltage outlet terminal to seal the high-voltage outlet terminal 1 of the voltage sensor body.

如图1和图2所示，所述低压电容的一端分别与所述高压线路板的低压输入端、所述瞬态二极管的一端和所述电压跟随器连接；所述低压电容的另一端分别与所述瞬态二极管的另一端、所述电压跟随器和所述变压器14的一次侧连接，且所述低压电容的另一端端接地。本公开采用的变压器14可以为微型变压器；其中，低压电容的结构如图8所示，上下两层金属镀层50形成电容器极板，无填充部分为介质51，薄膜两边留有空白，即“留边52”，防止上下两极板之间爬电。As shown in Figures 1 and 2, one end of the low-voltage capacitor is respectively connected to the low-voltage input end of the high-voltage circuit board, one end of the transient diode and the voltage follower; the other end of the low-voltage capacitor is respectively connected to the other end of the transient diode, the voltage follower and the primary side of the transformer 14, and the other end of the low-voltage capacitor is grounded. The transformer 14 used in the present disclosure can be a micro transformer; wherein the structure of the low-voltage capacitor is shown in Figure 8, wherein the upper and lower metal plating layers 50 form the capacitor plates, the unfilled part is the dielectric 51, and blanks are left on both sides of the film, namely "margins 52", to prevent creepage between the upper and lower plates.

低压电容外壳结构如图9所示，低压线路盒15为低压电容外壳，低压线路盒15是开口的但是带底，供低压电容的芯组放入里面后，绝缘胶再注入其中密封。The low-voltage capacitor housing structure is shown in FIG9 . The low-voltage line box 15 is the low-voltage capacitor housing. The low-voltage line box 15 is open but has a bottom. After the core group of the low-voltage capacitor is placed inside, insulating glue is injected into it to seal it.

具体地，本公开采用并联TVS瞬态二极管实现过电压保护，有效避免操作冲击电压和雷电冲击电压的影响，从而保证后级电路安全。采用TVS二极管过电压保护的效果具体包括：(1)TVS二极管反应速度为皮秒级，而压敏电阻型和气体放电管型反应速度为纳秒级，因此TVS二极管反应速度快，有效 保护了后级电压跟随器、微型变压器和控制单元等二次电路。(2)由于后级釆用了电压跟随器，它隔离了后级电感性对前级电容性的作用，故在一次高压电路出现雷电冲击电压和操作冲击电压时，后级电感性不会在前级与高压电容5和低压电容产生快速高压振荡延时效应，即可以采用反应速度快的TVS二极管作为过电压保护。Specifically, the present disclosure adopts parallel TVS transient diodes to achieve overvoltage protection, effectively avoiding the influence of operating impulse voltage and lightning impulse voltage, thereby ensuring the safety of the subsequent circuit. The effects of using TVS diodes for overvoltage protection specifically include: (1) The reaction speed of TVS diodes is in the picosecond level, while the reaction speed of varistor type and gas discharge tube type is in the nanosecond level, so the TVS diode has a fast reaction speed and is effective. The secondary circuits such as the voltage follower, micro transformer and control unit are protected. (2) Since the voltage follower is used in the rear stage, it isolates the effect of the inductance of the rear stage on the capacitance of the front stage. Therefore, when the lightning impulse voltage and the switching impulse voltage appear in the primary high-voltage circuit, the inductance of the rear stage will not produce a fast high-voltage oscillation delay effect in the front stage with the high-voltage capacitor 5 and the low-voltage capacitor, that is, the TVS diode with a fast reaction speed can be used as overvoltage protection.

本公开采用并联电压跟随器作为负载隔离消除负载引起的影响，同时隔离前级电容性和后级电感性之间的作用，有效避免了电路谐振，实现了LC兼容。采用并联电压跟随器的效果具体包括：(1)消除后级负载电路等效阻抗、等效电抗等直接并联到低压电容上，从而造成对输出参数精度的影响。(2)隔离了后级电感性直接连接到前级电容上，即按戴维南等效定理，避免了与前级电容(高压电容5和低压电容并联后)的串联，从而避免了LC谐振。The present disclosure adopts a parallel voltage follower as a load isolation to eliminate the influence caused by the load, and at the same time isolates the effect between the front-stage capacitance and the rear-stage inductance, effectively avoiding circuit resonance and achieving LC compatibility. The effects of using a parallel voltage follower specifically include: (1) eliminating the equivalent impedance, equivalent reactance, etc. of the rear-stage load circuit directly connected in parallel to the low-voltage capacitor, thereby affecting the accuracy of the output parameters. (2) isolating the rear-stage inductance from being directly connected to the front-stage capacitor, that is, according to the Thevenin equivalent theorem, avoiding series connection with the front-stage capacitor (after the high-voltage capacitor 5 and the low-voltage capacitor are connected in parallel), thereby avoiding LC resonance.

如图16所示，微型变压器铁芯采用玻莫合金，所以设计为空心圆柱形，便于卷制。如图17所示，制造好的微型变压器置入微型变压器壳中，定位圆柱66从微型变压器铁芯线圈中间穿过，从而实现定位；左边进线孔67为第三供电压跟随器输出信号的输出线进入，从而作为微型变压器的输入端；下部出线孔为第三出线孔68，供二次相电压和零序电压信号出线之用；上盖固定螺丝孔和底盖螺丝孔都供安装固定之用。本公开采用并联微型变压器实现负载与前级一次单元的电气隔离，进一步保护后级智能控制器单元的安全；且便于实现零序电压。采用并联微型变压器的效果具体包括：(1)实现与后级用户控制单元的电气隔离。(2)便于实现相电压和零序电压的独立电路功能，如果不采用微型变压器，则零序电压无法串联叠加形成，因此，避免了相电压测量和零序电压实现之间的干扰。As shown in FIG16 , the iron core of the micro-transformer is made of glass-molded alloy, so it is designed as a hollow cylinder for easy rolling. As shown in FIG17 , the manufactured micro-transformer is placed in the shell of the micro-transformer, and the positioning cylinder 66 passes through the middle of the iron core coil of the micro-transformer to achieve positioning; the left inlet hole 67 is for the output line of the third voltage follower output signal to enter, thereby serving as the input end of the micro-transformer; the lower outlet hole is the third outlet hole 68, which is used for the outlet of the secondary phase voltage and zero-sequence voltage signals; the upper cover fixing screw hole and the bottom cover screw hole are both used for installation and fixing. The present disclosure adopts parallel micro-transformers to achieve electrical isolation between the load and the front-stage primary unit, further protecting the safety of the rear-stage intelligent controller unit; and it is convenient to achieve zero-sequence voltage. The effects of using parallel micro-transformers specifically include: (1) achieving electrical isolation from the rear-stage user control unit. (2) It is convenient to achieve the independent circuit functions of phase voltage and zero-sequence voltage. If a micro-transformer is not used, the zero-sequence voltage cannot be formed by series superposition, thereby avoiding interference between phase voltage measurement and zero-sequence voltage realization.

在电压传感器二次输出电路中，从低压电容C₁₂输出端，按顺序(不能颠倒)依次并联连接TVS二极管、电压跟随器、微型变压器、用户控制单元，形成了低压二次电路参数有效实现的良性循环。In the secondary output circuit of the voltage sensor, the TVS diode, voltage follower, micro transformer and user control unit are connected in parallel in sequence (not reversed) from the output end of the low-voltage capacitor _C12 , forming a virtuous cycle for the effective realization of the low-voltage secondary circuit parameters.

所述高压线路板6、高压电容5、低压电容、瞬态二极管、电压跟随器和变压器14均设置在所述外壳的内部；所述高压出线端子1贯穿所述外壳；图19为微型气阀设计图，本公开的气阀12可以采用微型气阀；如图19所示，微型气阀上端设计有通气小孔，即气孔69，供抽真空和充入氮气之用，小孔下端设计有带螺纹的大孔，且小孔和大孔相通，便于置入圆环形密封件70和对应金属圆盘形垫圈71，以及通过螺杆72的拧入达到密封状态。所述气阀12设置在所述外壳上；绝缘气体通过所述气阀12充入所述外壳的内部。The high-voltage circuit board 6, high-voltage capacitor 5, low-voltage capacitor, transient diode, voltage follower and transformer 14 are all arranged inside the shell; the high-voltage outlet terminal 1 runs through the shell; FIG19 is a design diagram of a micro valve, and the gas valve 12 disclosed in the present invention can adopt a micro valve; as shown in FIG19, the upper end of the micro valve is designed with a ventilation hole, i.e., a gas hole 69, for vacuuming and filling with nitrogen, and the lower end of the small hole is designed with a large hole with a thread, and the small hole and the large hole are connected, so as to facilitate the placement of a circular seal 70 and a corresponding metal disc-shaped gasket 71, and to achieve a sealing state by screwing in a screw 72. The gas valve 12 is arranged on the shell; the insulating gas is filled into the interior of the shell through the gas valve 12.

具体地，成套产品釆用单只高压电容5串联焊接在线路板上后，再连同线路板固定在外壳中，不需要实心封装环氧树脂，便于返修与维护，提高了产品合格率和原材料利用率。成品组装后，通过气阀12抽真空，然后充入氮气，密封底盖8，不仅有效隔离空气湿度影响，防止产品内部氧化，而且避免了大量使用环氧树脂填充，实现了无环境污染后患。Specifically, the complete set of products adopts a single high-voltage capacitor 5 that is welded in series on the circuit board, and then fixed in the housing together with the circuit board, without the need for solid encapsulation epoxy resin, which is convenient for repair and maintenance, and improves the product qualification rate and raw material utilization rate. After the finished product is assembled, it is evacuated through the air valve 12, and then filled with nitrogen, and the bottom cover 8 is sealed, which not only effectively isolates the influence of air humidity and prevents internal oxidation of the product, but also avoids the use of a large amount of epoxy resin filling, and achieves no environmental pollution.

作为一个具体的实施方式，如图20和图21所示，外壳可以包括硅橡胶套3、底盖8和内壳4；所述硅橡胶套3套设在所述内壳4的外壁上；所述底盖8固定在所述内壳4的开口处；所述底盖8与所述内壳4构成封闭的空间；具体地，所述底盖8通过密封件2和安装螺丝13与所述内壳4构成封闭的空 间；所述高压线路板6、高压电容5、低压电容、瞬态二极管、电压跟随器和变压器14均设置在所述封闭的空间中；所述气阀12设置在所述底盖8上并连通所述封闭的空间和所述外壳的外部。所述底盖8上可以设置有定位凹槽7；所述高压线路板6的一端通过所述凹槽固定；所述高压线路板6的另一端与所述高压出线端子1固定连接。As a specific embodiment, as shown in FIG. 20 and FIG. 21 , the outer shell may include a silicone rubber sleeve 3, a bottom cover 8 and an inner shell 4; the silicone rubber sleeve 3 is sleeved on the outer wall of the inner shell 4; the bottom cover 8 is fixed at the opening of the inner shell 4; the bottom cover 8 and the inner shell 4 form a closed space; specifically, the bottom cover 8 forms a closed space with the inner shell 4 through a seal 2 and a mounting screw 13. The high-voltage circuit board 6, the high-voltage capacitor 5, the low-voltage capacitor, the transient diode, the voltage follower and the transformer 14 are all arranged in the closed space; the gas valve 12 is arranged on the bottom cover 8 and connects the closed space with the outside of the housing. The bottom cover 8 may be provided with a positioning groove 7; one end of the high-voltage circuit board 6 is fixed by the groove; the other end of the high-voltage circuit board 6 is fixedly connected to the high-voltage outlet terminal 1.

本公开提供的LC兼容型电压传感器，所述电压传感器还可以包括接线端子；所述接线端子包括所述电压跟随器的工作电源进线端子11、接地端子10和所述变压器的二次侧端子；所述接线端子设置在所述底盖8上。本公开中，变压器的二次侧端子为低压端子9，如图18所示，低压端子9上下设计有螺纹孔，供内部接线和外部出线之用，中间设计有凹槽，以增强和外壳底盖结合力，低压端子9为圆柱形嵌件，嵌入在外壳底盖8中。所述电压传感器还可以包括低压线路板和低压线路盒15，如图14和图15所示，所述低压电容、瞬态二极管和电压跟随器固定连接在所述低压线路板上，并将所述低压线路板设置在所述低压线路盒15内；在图14中，低压线路板60的焊接点及间距，按低压电容脚距和电压跟随器的封装进行制作。四角有低压线路板安装孔59，便于安装在低压线路板盒中。在图15中，内部四个角处设计有低压线路板和壳体相连的带螺纹孔的低压线路板固定支架62，便于线路板放置到里面后，上下有一定的间隙，为低压电容和电压跟随器留有适当占据空间；底部留有第一出线孔64为接地出线孔；右边出线孔为第二出线孔65，从第二出线孔65出来的供电压跟随器输出端线连接到微型变压器的输入端；上盖63设有可以固定封盖的低压线路盒安装孔61，壳子底部设有可以固定在电压传感器外壳底盖的低压线路盒安装孔61。如图15所示，本公开还包括密封件2；所述密封件2包括高压出线端子密封件54、微型气阀密封件和产品底盖密封件，密封件2的形状都是圆环形，其内直径比孔径大2～3mm，外直径比密封圈内直径大5～8mm。如图22所示，高压出线端子密封件54和微型阀门密封件设计为圆环形密封圈，其截面为圆环形。The LC compatible voltage sensor provided by the present disclosure may further include a wiring terminal; the wiring terminal includes a working power supply input terminal 11 of the voltage follower, a ground terminal 10 and a secondary terminal of the transformer; the wiring terminal is arranged on the bottom cover 8. In the present disclosure, the secondary terminal of the transformer is a low-voltage terminal 9, as shown in FIG18, the low-voltage terminal 9 is designed with threaded holes on the top and bottom for internal wiring and external wiring, and a groove is designed in the middle to enhance the bonding force with the bottom cover of the shell, and the low-voltage terminal 9 is a cylindrical insert embedded in the bottom cover 8 of the shell. The voltage sensor may also include a low-voltage circuit board and a low-voltage circuit box 15, as shown in FIG14 and FIG15, the low-voltage capacitor, transient diode and voltage follower are fixedly connected to the low-voltage circuit board, and the low-voltage circuit board is arranged in the low-voltage circuit box 15; in FIG14, the welding points and spacing of the low-voltage circuit board 60 are made according to the low-voltage capacitor pitch and the packaging of the voltage follower. There are low-voltage circuit board mounting holes 59 at the four corners for easy installation in the low-voltage circuit board box. In FIG15 , a low-voltage circuit board fixing bracket 62 with threaded holes connected to the low-voltage circuit board and the housing is designed at the four corners of the interior, so that after the circuit board is placed inside, there is a certain gap between the upper and lower parts, leaving appropriate space for the low-voltage capacitor and the voltage follower; the first outlet hole 64 is reserved at the bottom for grounding outlet hole; the outlet hole on the right is the second outlet hole 65, and the voltage follower output terminal line coming out of the second outlet hole 65 is connected to the input end of the micro transformer; the upper cover 63 is provided with a low-voltage circuit box mounting hole 61 that can fix the cover, and the bottom of the shell is provided with a low-voltage circuit box mounting hole 61 that can be fixed to the bottom cover of the voltage sensor housing. As shown in FIG15 , the present disclosure also includes a seal 2; the seal 2 includes a high-voltage outlet terminal seal 54, a micro valve seal and a product bottom cover seal, and the shape of the seal 2 is a circular ring, the inner diameter of which is 2 to 3 mm larger than the aperture, and the outer diameter is 5 to 8 mm larger than the inner diameter of the sealing ring. As shown in FIG. 22 , the high-voltage outlet terminal seal 54 and the micro valve seal are designed as annular sealing rings, and their cross sections are annular.

产品底盖密封件为长方形，厚度2.5～3.5mm。具体如图23所示，产品底盖密封件按安装底盒实际长方形设计为带小圆角长方形，四周留有安装孔，密封件厚度2.5mm～3.5mm；产品底盖的设计图如图24和图25所示，产品底座安装盒，即产品的底盖8，产品的底盖8的形状为长方体，下面为开口，便于单相分别安装，上面三个方形安装孔，便于二次电压出线和电压跟随器工作电源进线；方形安装孔四周留有单相产品安装螺丝固定孔，上面装有空心圆柱体，构成应用安装孔，它和安装盒焊接在一起形成整体，供三相成套产品固定安装在电线杆横担上之用。下面出线安装盒和出线孔供二次电压出线和电压跟随器工作电源进线。底盖密封件放置底盖上部，并配合涂上的密封胶。经底盖固定安装螺丝拧紧后形成密封状态，从而有效防止外部灰尘和湿度的侵入。The bottom cover seal of the product is rectangular and has a thickness of 2.5 to 3.5 mm. As shown in Figure 23, the bottom cover seal of the product is designed as a rectangle with small rounded corners according to the actual rectangular shape of the installation bottom box, with installation holes left around it, and the thickness of the seal is 2.5 mm to 3.5 mm; the design drawings of the bottom cover of the product are shown in Figures 24 and 25. The product base installation box, that is, the bottom cover 8 of the product, is in the shape of a rectangular parallelepiped, with an opening at the bottom for easy installation of single-phase, and three square installation holes on the top for easy secondary voltage outlet and voltage follower working power supply line; single-phase product installation screw fixing holes are left around the square installation holes, and a hollow cylinder is installed on the top to form an application installation hole, which is welded together with the installation box to form a whole for the three-phase complete set of products to be fixedly installed on the cross arm of the electric pole. The outlet installation box and the outlet hole below are for the secondary voltage outlet and the voltage follower working power supply line. The bottom cover seal is placed on the upper part of the bottom cover and matched with the sealant applied. After the bottom cover fixing screws are tightened, a sealed state is formed, thereby effectively preventing the intrusion of external dust and humidity.

以10kV-ZW32户外型为例，本公开提供的LC兼容型电压传感器，具有电气参数：Taking the 10kV-ZW32 outdoor type as an example, the LC compatible voltage sensor provided by the present disclosure has electrical parameters:

1.额定绝缘水平：10kV/42kV/75kV；2.二次额定工作电压：相序零序6.5/3V；3.精度：相序0.5级，零序3P级；4.负载：≥2MΩ；5.爬距设计：内爬距≥200mm，外爬距≥350mm；6.高压臂电容量：600PF；7.低压电容输出电压：3.753V(即2倍)。由此可知低压电容量为0.92μF；8. 低压微型变压器相电压变比：2︰1。1. Rated insulation level: 10kV/42kV/75kV; 2. Secondary rated working voltage: Phase sequence Zero sequence 6.5/3V; 3. Accuracy: phase sequence 0.5 level, zero sequence 3P level; 4. Load: ≥2MΩ; 5. Creepage distance design: inner creepage distance ≥200mm, outer creepage distance ≥350mm; 6. High voltage arm capacitance: 600PF; 7. Low voltage capacitor output voltage: 3.753V (i.e. 2 times ). From this we can know that the low voltage capacitance is 0.92μF; 8. Low voltage micro transformer phase voltage ratio: 2:1.

具体地，内壳材料采用玻璃纤维环氧树脂。采用圆柱形，如图20所示。外部高度220mm，内腔高度210mm，内径80mm，外径100mm，壁厚10mm。Specifically, the inner shell material is glass fiber epoxy resin, and is cylindrical, as shown in FIG20 , with an outer height of 220 mm, an inner cavity height of 210 mm, an inner diameter of 80 mm, an outer diameter of 100 mm, and a wall thickness of 10 mm.

高压电容单只额定工作电压3KV，共用15只；单只高压电容容量9000PF，串联后电容量为600PF。高压电容采用内六串结构，如图4所示，介质PP膜，厚度10μm；高压电容电极采用蒸镀锌铝复合层和6μm铝箔。金属化PP薄膜蒸镀结构按图4所示。方阻：1～6，并涂防氧化油。卷绕：芯组容量9000PF，按图4所示结构挂膜调机，再计算圈数、设定卷绕圈数进行卷绕。热压：压力6MP～11MP；温度100℃～115℃；时间15～30分钟；每板200～300只。热聚合:100℃～115℃，20h。喷金：先芯组包裹，用比芯组宽3mm的牛皮纸包裹后，上机喷金，喷金厚度为0.5mm左右。赋能：剥去牛皮纸后，上机电压老练(即赋能)，直流电压5kV～6kV，周期15s。焊接引线：引线为镀锡紫铜线，直径0.5mm～0.8mm。封装：先将芯组***壳中，配好搅拌均匀环氧树脂，抽真空脱泡，再将环氧树脂注入壳内，而后***密封上盖。灌装好后，放进烘箱80℃烘烤6h。The rated working voltage of a high-voltage capacitor is 3KV, and 15 of them are shared; the capacity of a single high-voltage capacitor is 9000PF, and the capacitance after series connection is 600PF. The high-voltage capacitor adopts an inner six-string structure, as shown in Figure 4, with a dielectric PP film with a thickness of 10μm; the high-voltage capacitor electrode adopts a vapor-deposited zinc-aluminum composite layer and a 6μm aluminum foil. The metallized PP film vapor deposition structure is shown in Figure 4. Square resistance: 1~6, and anti-oxidation oil is applied. Winding: The core group capacity is 9000PF, and the film is hung according to the structure shown in Figure 4. Adjust the machine, calculate the number of turns, set the number of winding turns, and wind. Hot pressing: pressure 6MP~11MP; temperature 100℃~115℃; time 15~30 minutes; 200~300 per board. Thermal polymerization: 100℃~115℃, 20h. Gold spraying: First wrap the core group, wrap it with kraft paper 3mm wider than the core group, and then spray gold on the machine. The thickness of the gold spraying is about 0.5mm. Empowerment: After peeling off the kraft paper, apply voltage aging (i.e. empowerment) on the machine, DC voltage 5kV~6kV, cycle 15s. Welding lead: The lead is tinned copper wire, diameter 0.5mm~0.8mm. Packaging: First insert the core group into the shell, mix and evenly mix the epoxy resin, vacuum degassing, then inject the epoxy resin into the shell, and then insert the sealing cover. After filling, put it in the oven and bake it at 80℃ for 6h.

高压电容测试：耐电压：交流3kV，3s。绝缘电阻：500V，大于20000MΩ。介质损耗：1kHz，小于0.001。容量偏差按±5％设定。High voltage capacitor test: Withstand voltage: AC 3kV, 3s. Insulation resistance: 500V, greater than 20000MΩ. Dielectric loss: 1kHz, less than 0.001. Capacitance deviation is set at ±5%.

低压电容采用一串结构，如图8所示。介质PP膜，厚度5μm；额定工作电压250V；共用2只，根据低压电容输出电压计算可以得到，额定单只电容量为0.46μF。实际中电容量应卷小一点，便于终端调试。调试电容额定工作电压都是250V以上，电容量分别为0.0033μF、0.01μF、0.022μF和0.033μF等，根据实际需要可以卷绕其它容量。介质采用PP膜，厚度：5μm。电极采用蒸镀锌铝复合层。金属化PP膜蒸镀结构按图8。方阻：边缘加厚区1～2，普通区3～6，并涂防氧化油。卷绕、热压、热聚合和喷金同高压电容一致。赋能：去牛皮纸后上机电压老练(即赋能)，直流电压按PP膜实际厚度，100V/μm，周期15s。焊接引线同高压电容操作方法一致。封装：先将芯组***壳中，配好搅拌均匀树脂，抽真空脱泡，再将环氧树脂注入壳内，灌装好后放进烘箱80℃烘烤6h。低压电容测试结果：The low-voltage capacitor adopts a string structure, as shown in Figure 8. The dielectric is PP film, with a thickness of 5μm; the rated working voltage is 250V; there are 2 in common. According to the output voltage of the low-voltage capacitor, it can be calculated that the rated single capacitance is 0.46μF. In practice, the capacitance should be rolled smaller to facilitate terminal debugging. The rated working voltage of the debugging capacitor is above 250V, and the capacitance is 0.0033μF, 0.01μF, 0.022μF and 0.033μF, etc. Other capacities can be wound according to actual needs. The dielectric is PP film, with a thickness of 5μm. The electrode is a vapor-deposited zinc-aluminum composite layer. The metallized PP film vapor deposition structure is as shown in Figure 8. Square resistance: edge thickening area 1~2, ordinary area 3~6, and anti-oxidation oil is applied. Winding, hot pressing, thermal polymerization and gold spraying are consistent with high-voltage capacitors. Energizing: After removing the kraft paper, the machine voltage is aged (i.e., empowered), and the DC voltage is based on the actual thickness of the PP film, 100V/μm, and the cycle is 15s. The welding lead is the same as the high-voltage capacitor operation method. Packaging: first insert the core group into the shell, mix the resin evenly, vacuum degassing, and then inject the epoxy resin into the shell. After filling, put it into the oven at 80℃ for 6 hours. Low-voltage capacitor test results:

耐电压：交流100V，3s。绝缘电阻：100V，大于15000MΩ。介质损耗：1kHz，小于0.001。容量偏差按±5％设定。Withstand voltage: AC 100V, 3s. Insulation resistance: 100V, greater than 15000MΩ. Dielectric loss: 1kHz, less than 0.001. Capacitance deviation is set at ±5%.

过电压保护TVS管采用10V/1000W，电压跟随器为OPA354高电压运算放大器，由于微型变压器工作电压很低，负载很小，工作电流很小，为了保证灵敏度和线性度，铁芯磁体采用磁化密度高、起始磁化点低的玻莫合金。铁芯采用圆环形，外径25mm，内径15mm，高8mm。绕组采用直径0.5mm的紫铜漆包线。一次绕组200圈，二次绕组100圈。绝缘胶带包裹固定好线圈后，放入方盒内固定。结构设计如图16和17。高压线路板6的树脂板厚度3～5mm，紫铜层厚度0.1mm以上，表面涂有防氧化漆；低压线路板的外形设计如图14和图15。树脂板厚度1～2mm，紫铜层厚度0.1mm以上，表面涂有防氧化漆，高压出线端子的材质为黄铜。高压硅橡胶连接线设计如图13：采用硅橡胶护套绝缘线，内部紫铜导线直径2.5mm以上，两头带有带圆孔接线铜片。低压二次电缆线采用十一分支芯电缆线。 The overvoltage protection TVS tube uses 10V/1000W, and the voltage follower is the OPA354 high voltage operational amplifier. Since the working voltage of the micro transformer is very low, the load is very small, and the working current is very small, in order to ensure sensitivity and linearity, the core magnet uses a Permolite alloy with high magnetization density and low starting magnetization point. The core adopts a circular ring shape with an outer diameter of 25mm, an inner diameter of 15mm, and a height of 8mm. The winding uses a copper enameled wire with a diameter of 0.5mm. The primary winding has 200 turns and the secondary winding has 100 turns. After the coil is wrapped and fixed with insulating tape, it is placed in a square box and fixed. The structural design is shown in Figures 16 and 17. The thickness of the resin board of the high-voltage circuit board 6 is 3-5mm, the thickness of the copper layer is more than 0.1mm, and the surface is coated with anti-oxidation paint; the appearance design of the low-voltage circuit board is shown in Figures 14 and 15. The thickness of the resin board is 1-2mm, the thickness of the copper layer is more than 0.1mm, and the surface is coated with anti-oxidation paint. The material of the high-voltage outlet terminal is brass. The design of high-voltage silicone rubber connecting wire is shown in Figure 13: It uses silicone rubber sheathed insulated wire, the internal copper wire diameter is more than 2.5mm, and there are copper sheets with round holes at both ends. The low-voltage secondary cable uses eleven-branch core cable.

本公开提供的LC兼容型电压传感器的组装过程如下所述：The assembly process of the LC compatible voltage sensor provided by the present disclosure is as follows:

第一步：焊接；该步骤的焊接包括高压出线端子焊接，高压电容器串联排列安装固定和焊接和低压出线焊接。具体包括：The first step: welding; the welding in this step includes the welding of high-voltage outlet terminals, the installation and welding of high-voltage capacitors in series, and the welding of low-voltage outlets. Specifically include:

1.先焊接好高压出线端子。1. Weld the high voltage output terminals first.

按设计图11，先在线路板插缝中涂上一层密封胶，然后将高压电容自上而下，依次逐一***线路板，焊接好电容引线，拧上固定外壳的尼龙绝缘螺丝，并逐一将密封胶涂好，使高压电容外壳上的绝缘插板和线路板粘合形成一体。最后再焊接好低压出线和接地出线。According to the design drawing 11, first apply a layer of sealant in the slot of the circuit board, then insert the high-voltage capacitors into the circuit board one by one from top to bottom, weld the capacitor leads, screw on the nylon insulating screws that fix the shell, and apply sealant one by one to make the insulating plug on the high-voltage capacitor shell and the circuit board bonded together. Finally, weld the low-voltage outlet and ground outlet.

第二步：低压线路板的焊接和微型输出变压器的安装。Step 2: Soldering of low voltage circuit board and installation of micro output transformer.

1.按照高压电容串联后的电容量和需要的二次输出相电压的两倍，匹配低压电容量，但比实际需要的电容量略小一点，为下面调试留有余量。1. Match the low-voltage capacitor according to the capacitance of the high-voltage capacitor in series and twice the required secondary output phase voltage, but it should be slightly smaller than the actual required capacitance to leave margin for the following debugging.

2.按电气原理图将低压电容、压敏电阻、电压跟随器焊接在低压线路板上，并固定在低压线路盒中。2. According to the electrical schematic diagram, solder the low-voltage capacitor, varistor, and voltage follower to the low-voltage circuit board and fix them in the low-voltage circuit box.

3.将电压跟随器输出端连接到微型变压器的输入端。3. Connect the voltage follower output to the input of the micro transformer.

4.将两种线路盒分别固定在外壳底盖上。将微型变压器的相电压和零序电压出线连接到外壳底盖相对应的出线端子上。4. Fix the two circuit boxes on the bottom cover of the housing respectively. Connect the phase voltage and zero-sequence voltage output lines of the micro-transformer to the corresponding output terminals on the bottom cover of the housing.

5.将接地端连接到外壳底盖接地端子上。5. Connect the ground terminal to the ground terminal on the bottom cover of the housing.

第三步：校验误差和调试。Step 3: Error verification and debugging.

1.按电气原理图接线，校验误差。1. Connect the wires according to the electrical schematic diagram and check the error.

2.先调试测量级。当增减微型变压器二次绕组圈数精度不能满足时，则采取增加或减少二次电容容量调试。2. Debug the measurement stage first. When the precision of increasing or decreasing the number of turns of the secondary winding of the micro transformer cannot be met, increase or decrease the capacity of the secondary capacitor for debugging.

3.调试零序保护级，以增减二次绕组圈数方式进行。3. Debug the zero-sequence protection level by increasing or decreasing the number of secondary winding turns.

4.调试结束后，分别盖上低压线路板和微型变压器的盒盖，并拧上绝缘螺丝。4. After debugging, cover the box covers of the low-voltage circuit board and micro-transformer respectively, and tighten the insulating screws.

第四步：单相组装。Step 4: Single-phase assembly.

1.按成品(单相)外形及内部结构图3，将高压出线端子套上密封圈，然后将线路板***壳内，让螺杆穿过上端圆孔，再把高压出线带有圆孔的铜片套在螺杆上，拧紧螺帽，最后涂上密封胶，把绝缘密封帽拉上盖住螺杆并压紧。1. According to the finished product (single-phase) appearance and internal structure Figure 3, put the sealing ring on the high-voltage outlet terminal, then insert the circuit board into the shell, let the screw pass through the upper round hole, and then put the copper sheet with round holes on the high-voltage outlet on the screw, tighten the nut, and finally apply sealant, pull the insulating sealing cap up to cover the screw and press it tightly.

2.放好低盖密封圈，盖上底盖，拧紧固定螺丝。并放入烘箱90℃脱湿2h。2. Put the lower cover seal ring in place, cover the bottom cover, tighten the fixing screws, and put it in an oven at 90℃ for 2 hours to dehumidify.

3.将高压端向上直立，抽真空后充入氮气，微正压即可。因为氮气密度比空略小，所以将辅助充气阀门取下，而后立即依次放入密封圈、垫片，并将密封螺丝***拧紧。3. Stand the high-pressure end upright, evacuate the air and fill it with nitrogen to create a slight positive pressure. Because the density of nitrogen is slightly smaller than that of air, remove the auxiliary inflation valve, and then immediately insert the sealing ring and gasket in turn, and insert and tighten the sealing screw.

4.最后将产品倒立涂上密封胶，并观察是否有气泡冒出，以检查密封效果。4. Finally, turn the product upside down and apply sealant, and observe whether there are bubbles to check the sealing effect.

第五步：成套产品组装。Step 5: Assemble the complete set of products.

1.将二次输出电缆线按需要长度剪好。1. Cut the secondary output cable to the required length.

2.将三只单相分别安装在底板盒上，如图24，拧紧固定螺丝钉。 2. Install the three single-phases on the bottom box separately, as shown in Figure 24, and tighten the fixing screws.

3.按三相电气原理图，如图2所示，将相序分别接到电缆an，bn，cn分支线上。3. According to the three-phase electrical schematic, as shown in Figure 2, connect the phase sequence to the cable an, bn, and cn branch lines respectively.

4.按三相电气原理图，如图2所示，串联三相零序电压，而后将零序输出端连接到电缆dn分支线上。4. According to the three-phase electrical schematic, as shown in Figure 2, connect the three-phase zero-sequence voltage in series, and then connect the zero-sequence output end to the cable dn branch line.

5.将接地线分别连接到电缆线中的接地线分支和底板盒上。5. Connect the ground wire to the ground wire branch in the cable and the base box respectively.

6.将相序接线端子和零序接线端子及接地线端子用密封胶密封好。6. Seal the phase sequence terminals, zero sequence terminals and grounding terminals with sealant.

7.将电缆线固定在底板盒上。垫好密封条，盖上底盖，拧上固定螺丝。7. Fix the cables on the bottom box, put in the sealing strip, put on the bottom cover, and tighten the fixing screws.

第六步：按照标准要求检验技术参数。Step 6: Check technical parameters according to standard requirements.

1.工频耐电压和局部放电检验：1. Power frequency withstand voltage and partial discharge test:

(1)先将电压传感器低压二次端子和接地端子连接在一起，然后一同接到高压试验台接地线上，再将高压试验台高压端的连接线接到电压传感器的高压出线端子上。(1) First connect the low-voltage secondary terminal and the ground terminal of the voltage sensor together, and then connect them to the ground wire of the high-voltage test bench. Then connect the connecting wire of the high-voltage end of the high-voltage test bench to the high-voltage output terminal of the voltage sensor.

(2)匀速升压到42kV，保持1分钟后，在此期间，产品应无击穿、无闪络现象发生。(2) The voltage is increased uniformly to 42 kV and maintained for 1 minute. During this period, the product should not experience breakdown or flashover.

(3)匀速降电压到14.4kV，保持1分钟，观察局部放电，在此期间，局部放电量应小于10pc。(3) Reduce the voltage uniformly to 14.4 kV, maintain it for 1 minute, and observe the partial discharge. During this period, the partial discharge should be less than 10 pc.

(4)测试完成，将电压降到0后，取下产品。(4) After the test is completed, reduce the voltage to 0 and remove the product.

2.雷电冲击检验：2. Lightning impulse test:

(1)标准雷电冲击电压是：波前时间T1为1.2μs，半波峰值时间T2为50μs的双指数波；标准雷电冲击截波是标准雷电冲击波经过2μs～5μs被外部间隙截断产生的电压波。实际试验波形与标准波形的偏差应符合GB/T16927.1-2011要求。(1) The standard lightning impulse voltage is a double exponential wave with a wave front time T1 of 1.2μs and a half-wave peak time T2 of 50μs; the standard lightning impulse chopped wave is a voltage wave generated by the standard lightning impulse wave being truncated by an external gap after 2μs to 5μs. The deviation between the actual test waveform and the standard waveform shall comply with the requirements of GB/T16927.1-2011.

(2)先将电压传感器低压二次端子和接地端子连接在一起，然后一同接到雷电冲击试验台接地线上，再将雷电冲击试验台高压端的连接线接到电压传感器的高压出线端子上。(2) First connect the low-voltage secondary terminal and the grounding terminal of the voltage sensor together, and then connect them to the grounding wire of the lightning impulse test bench. Then connect the connecting wire of the high-voltage end of the lightning impulse test bench to the high-voltage output terminal of the voltage sensor.

(3)施加雷电冲击：(3) Applying lightning impulse:

(4)对产品施加5次正极性，峰值为75kV。(4) Apply positive polarity to the product 5 times with a peak value of 75kV.

(5)完成正极性雷电冲击试验电压后，再以负极性施加1次雷电冲击电压，随后施加2次雷电截波电压，峰值为85kV。。(5) After completing the positive polarity lightning impulse test voltage, apply a lightning impulse voltage with negative polarity, followed by two lightning chopping voltages with a peak value of 85 kV.

(6)然后再施加4次雷电冲击电压，峰值为75kV。(6) Then apply lightning impulse voltage four times with a peak value of 75kV.

(7)试验中如果没有发击穿或闪络，当回到初始工作状态时，再测试产品误差，其误差变化量不超出误差限值的1/2，则试验合格。(7) If no breakdown or flashover occurs during the test, the product error shall be tested again when the product returns to the initial working state. If the error change does not exceed 1/2 of the error limit, the test is considered qualified.

3.高温和低温变差检验：3. High temperature and low temperature variation test:

(1)将成套电压传感器放在高低温箱中，将高压出线端子和低压端子按实际运行方式接线到测试设备相应端子上。(1) Place the complete set of voltage sensors in a high and low temperature box, and connect the high voltage output terminals and low voltage terminals to the corresponding terminals of the test equipment according to the actual operating mode.

(2)高温变差试验：(2) High temperature variation test:

以20℃为起点温度，将温度上升到70℃，保持6h后，在额定一次电压下进行一次误差试验。然后等恢复到20℃，并保持放置6h小时后，再在额定一次电压下进行一次误差试验。两次测得的误差值应不超过误差限值；两次测得误差值的偏差应不超过误差限值的1/2。 With 20℃ as the starting point temperature, raise the temperature to 70℃, keep it for 6 hours, and then conduct an error test at the rated primary voltage. Then wait until it returns to 20℃ and keeps it for 6 hours, and then conduct an error test at the rated primary voltage. The error values measured twice should not exceed the error limit; the deviation of the error values measured twice should not exceed 1/2 of the error limit.

(3)低温变差试验：(3) Low temperature variation test:

以20℃为起点温度，将温度下降到-40℃，保持6h后，在额定一次电压下进行一次误差试验。然后等恢复到20℃，并保持放置6h小时后，再在额定一次电压下进行一次误差试验。两次测得的误差值应不超过误差限值；两次测得误差值的偏差应不超过误差限值的1/2。Take 20℃ as the starting point temperature, drop the temperature to -40℃, keep it for 6 hours, and then conduct an error test at the rated primary voltage. Then wait until it returns to 20℃ and keeps it for 6 hours, and then conduct an error test at the rated primary voltage. The error values measured twice should not exceed the error limit; the deviation of the error values measured twice should not exceed 1/2 of the error limit.

本公开提供的LC兼容型电压传感器，相较于相关技术，具有以下有益效果：Compared with the related art, the LC compatible voltage sensor provided by the present disclosure has the following beneficial effects:

1.内部绝缘为氮气和固体复合方式，绝缘可靠性高，防氧化性好。1. The internal insulation is a nitrogen and solid composite method with high insulation reliability and good anti-oxidation performance.

2.有助于运行精度的提高。因为内部是以气体填充，所以整个无件都在同类环境下，内部工作环境温度场很容易保持相同，减少了环境温度运行变差。2. It helps improve the running accuracy. Because the interior is filled with gas, the entire unit is in the same environment, and the internal working environment temperature field is easy to keep the same, reducing the running deterioration of the ambient temperature.

3.负载隔离、LC兼容杜绝***谐振、电气隔离三者同时满足电性能要求，极大的提高了产品运行的可靠性和安全性。3. Load isolation, LC compatibility to eliminate system resonance, and electrical isolation meet the electrical performance requirements at the same time, greatly improving the reliability and safety of product operation.

4.便于维护和返修，避免“一损俱损”浪废现象发生，提高了产品的合格率，提高了原材料的综合利用率。4. It is convenient for maintenance and repair, avoiding the waste phenomenon of "one damage to all", improving the qualified rate of products and the comprehensive utilization rate of raw materials.

5.内腔填充氮气，绿色环保。不仅避免大量使用环氧树脂，节约资源；而且产品运行期满后，便于拆缷支解，不需要经过高温焚烧，减少对环境污染。5. The inner cavity is filled with nitrogen, which is green and environmentally friendly. It not only avoids the use of large amounts of epoxy resin and saves resources, but also makes it easy to dismantle and disassemble after the product expires, without the need for high-temperature incineration, thus reducing environmental pollution.

本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

本文中应用了具体个例对本公开的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本公开的方法及其核心思想；同时，对于本领域的一般技术人员，依据本公开的思想，在具体实施方式及应用范围上均会有改变之处。综上所述，本说明书内容不应理解为对本公开的限制。This article uses specific examples to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method and core ideas of the present disclosure. At the same time, for those skilled in the art, according to the ideas of the present disclosure, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present disclosure.

工业实用性Industrial Applicability

本申请提供了一种LC兼容型电压传感器，涉及电压传感器领域，包括：高压线路板的两侧均设置有相互平行的开口；高压线路板的输出端与高压出线端子连接；高压电容通过相互平行的开口固定在线路板上；低压电容的一端分别与高压线路板的低压输出端、瞬态二极管的一端和电压跟随器连接；低压电容的另一端分别与瞬态二极管的另一端、电压跟随器和变压器的一次侧连接，且低压电容的另一端接地；高压线路板、高压电容、低压电容、瞬态二极管、电压跟随器和变压器均设置在外壳的内部；高压出线端子贯穿外壳；气阀设置在外壳上；绝缘气体通过气阀充入外壳的内部。本公开能够提高电压传感器的可靠性，便于维护和返修。The present application provides an LC compatible voltage sensor, which relates to the field of voltage sensors, including: both sides of a high-voltage circuit board are provided with openings parallel to each other; the output end of the high-voltage circuit board is connected to the high-voltage outlet terminal; the high-voltage capacitor is fixed on the circuit board through the openings parallel to each other; one end of the low-voltage capacitor is respectively connected to the low-voltage output end of the high-voltage circuit board, one end of the transient diode and the voltage follower; the other end of the low-voltage capacitor is respectively connected to the other end of the transient diode, the voltage follower and the primary side of the transformer, and the other end of the low-voltage capacitor is grounded; the high-voltage circuit board, the high-voltage capacitor, the low-voltage capacitor, the transient diode, the voltage follower and the transformer are all arranged inside the shell; the high-voltage outlet terminal runs through the shell; the gas valve is arranged on the shell; the insulating gas is filled into the inside of the shell through the gas valve. The present disclosure can improve the reliability of the voltage sensor and facilitate maintenance and repair.

此外，可以理解的是，本申请的LC兼容型电压传感器是可以重现的，并且可以用在多种工业应用中。例如，本申请的LC兼容型电压传感器可以用于需要提高电压传感器的可靠性的电子部件。 Furthermore, it is understood that the LC-compatible voltage sensor of the present application is reproducible and can be used in a variety of industrial applications. For example, the LC-compatible voltage sensor of the present application can be used in electronic components that require improved reliability of the voltage sensor.

Claims (15)

1. 一种LC兼容型电压传感器，其特征在于，所述电压传感器包括：高压线路板、高压电容、高压出线端子、低压电容、瞬态二极管、电压跟随器、变压器、外壳和气阀；An LC compatible voltage sensor, characterized in that the voltage sensor comprises: a high voltage circuit board, a high voltage capacitor, a high voltage outlet terminal, a low voltage capacitor, a transient diode, a voltage follower, a transformer, a housing and a gas valve;

   所述高压线路板的两侧均设置有相互平行的开口；所述高压线路板的输出端与所述高压出线端子连接；所述高压电容通过所述相互平行的开口固定在所述线路板上；Both sides of the high-voltage circuit board are provided with openings parallel to each other; the output end of the high-voltage circuit board is connected to the high-voltage output terminal; the high-voltage capacitor is fixed on the circuit board through the openings parallel to each other;

   所述低压电容的一端分别与所述高压线路板的低压输入端、所述瞬态二极管的一端和所述电压跟随器连接；所述低压电容的另一端分别与所述瞬态二极管的另一端、所述电压跟随器和所述变压器的一次侧连接，且所述低压电容的另一端接地；One end of the low-voltage capacitor is respectively connected to the low-voltage input end of the high-voltage circuit board, one end of the transient diode and the voltage follower; the other end of the low-voltage capacitor is respectively connected to the other end of the transient diode, the voltage follower and the primary side of the transformer, and the other end of the low-voltage capacitor is grounded;

   所述高压线路板、高压电容、低压电容、瞬态二极管、电压跟随器和变压器均设置在所述外壳的内部；所述高压出线端子贯穿所述外壳；The high-voltage circuit board, high-voltage capacitor, low-voltage capacitor, transient diode, voltage follower and transformer are all arranged inside the housing; the high-voltage outlet terminal runs through the housing;

   所述气阀设置在所述外壳上；绝缘气体通过所述气阀充入所述外壳的内部。The gas valve is arranged on the shell; the insulating gas is filled into the interior of the shell through the gas valve.
2. 根据权利要求1所述的LC兼容型电压传感器，其特征在于，所述外壳包括硅橡胶套、底盖和内壳；The LC compatible voltage sensor according to claim 1, characterized in that the housing comprises a silicone rubber sleeve, a bottom cover and an inner housing;

   所述硅橡胶套套设在所述内壳的外壁上；The silicone rubber sleeve is sleeved on the outer wall of the inner shell;

   所述底盖固定在所述内壳的开口处；所述底盖与所述内壳构成封闭的空间；The bottom cover is fixed at the opening of the inner shell; the bottom cover and the inner shell form a closed space;

   所述高压线路板、高压电容、低压电容、瞬态二极管、电压跟随器和变压器均设置在所述封闭的空间中；所述气阀设置在所述底盖上并连通所述封闭的空间和所述外壳的外部。The high-voltage circuit board, high-voltage capacitor, low-voltage capacitor, transient diode, voltage follower and transformer are all arranged in the closed space; the gas valve is arranged on the bottom cover and connects the closed space and the outside of the shell.
3. 根据权利要求1或2所述的LC兼容型电压传感器，其特征在于，所述气阀为微型气阀，所述微型气阀上端设计有通气小孔，供抽真空和充入氮气之用，所述小孔下端设计有带螺纹的大孔，且所述小孔和所述大孔相通。The LC-compatible voltage sensor according to claim 1 or 2 is characterized in that the air valve is a micro air valve, and a ventilation hole is designed at the upper end of the micro air valve for vacuuming and filling with nitrogen, and a large hole with threads is designed at the lower end of the small hole, and the small hole is connected to the large hole.
4. 根据权利要求2或3所述的LC兼容型电压传感器，其特征在于，所述底盖上设置有定位凹槽；所述高压线路板的一端通过所述凹槽固定；所述高压线路板的另一端与所述高压出线端子固定连接。The LC-compatible voltage sensor according to claim 2 or 3 is characterized in that a positioning groove is provided on the bottom cover; one end of the high-voltage circuit board is fixed by the groove; and the other end of the high-voltage circuit board is fixedly connected to the high-voltage output terminal.
5. 根据权利要求1至4中任一项所述的LC兼容型电压传感器，其特征在于，所述电压传感器还包括高压端子硅橡胶连接线，所述高压端子硅橡胶连接线与所述高压出线端子连接，并且所述高压端子硅橡胶连接线将所述高压出线端子密封。The LC-compatible voltage sensor according to any one of claims 1 to 4 is characterized in that the voltage sensor also includes a high-voltage terminal silicone rubber connecting wire, the high-voltage terminal silicone rubber connecting wire is connected to the high-voltage output terminal, and the high-voltage terminal silicone rubber connecting wire seals the high-voltage output terminal.
6. 根据权利要求1至5中任一项所述的LC兼容型电压传感器，其特征在于，所述电压传感器还包括接线端子；所述低压端子包括所述电压跟随器的工作电源进线端子、接地端子和所述变压器的二次侧端子；所述接线端子设置在所述底盖上。The LC-compatible voltage sensor according to any one of claims 1 to 5 is characterized in that the voltage sensor also includes wiring terminals; the low-voltage terminals include working power supply input terminals of the voltage follower, ground terminals and secondary side terminals of the transformer; and the wiring terminals are arranged on the bottom cover.
7. 根据权利要求1至6中任一项所述的LC兼容型电压传感器，其特征在于，所述变压器为微型变压器。The LC compatible voltage sensor according to any one of claims 1 to 6, characterized in that the transformer is a micro transformer.
8. 根据权利要求6所述的LC兼容型电压传感器，其特征在于，所述变压器的二次侧端子上下设计 有螺纹孔，供内部接线和外部出线之用，所述变压器的二次侧端子中间设计有凹槽，以增强所述变压器的二次侧端子和所述底盖结合力。The LC compatible voltage sensor according to claim 6 is characterized in that the secondary side terminals of the transformer are designed There are threaded holes for internal wiring and external wiring. A groove is designed in the middle of the secondary terminal of the transformer to enhance the bonding force between the secondary terminal of the transformer and the bottom cover.
9. 根据权利要求1至8中任一项所述的LC兼容型电压传感器，其特征在于，所述高压电容为薄膜电容。The LC-compatible voltage sensor according to any one of claims 1 to 8, characterized in that the high-voltage capacitor is a thin-film capacitor.
10. 根据权利要求1至9中任一项所述的LC兼容型电压传感器，其特征在于，所述高压电容采用内六串薄膜结构。The LC compatible voltage sensor according to any one of claims 1 to 9, characterized in that the high voltage capacitor adopts an inner six-series thin film structure.
11. 根据权利要求9至10中任一项所述的LC兼容型电压传感器，其特征在于，所述电压传感器还包括高压电容外壳；The LC compatible voltage sensor according to any one of claims 9 to 10, characterized in that the voltage sensor further comprises a high voltage capacitor housing;

    所述高压电容设置在所述高压电容外壳内；The high-voltage capacitor is arranged in the high-voltage capacitor housing;

    所述外壳的两侧设置有绝缘插板；所述绝缘插板***对应的所述相互平行的开口。Insulating plug plates are arranged on both sides of the shell; the insulating plug plates are inserted into the corresponding parallel openings.
12. 根据权利要求1至11中任一项所述的LC兼容型电压传感器，其特征在于，所述相互平行的开口之间的间距一致。The LC compatible voltage sensor according to any one of claims 1 to 11, characterized in that the spacings between the parallel openings are consistent.
13. 根据权利要求1至12中任一项所述的LC兼容型电压传感器，其特征在于，所述电压传感器还包括低压线路板；The LC-compatible voltage sensor according to any one of claims 1 to 12, characterized in that the voltage sensor further comprises a low voltage circuit board;

    所述低压电容、瞬态二极管和电压跟随器固定连接在所述低压线路板上。The low-voltage capacitor, transient diode and voltage follower are fixedly connected to the low-voltage circuit board.
14. 根据权利要求13所述的LC兼容型电压传感器，其特征在于，所述电压传感器还包括低压线路盒，所述低压线路板设置在所述低压线路盒内。The LC-compatible voltage sensor according to claim 13 is characterized in that the voltage sensor further comprises a low-voltage circuit box, and the low-voltage circuit board is arranged in the low-voltage circuit box.
15. 根据权利要求14所述的LC兼容型电压传感器，其特征在于，所述低压线路板四角具有低压线路板安装孔，便于使所述低压线路板安装在所述低压线路板盒中。 The LC-compatible voltage sensor according to claim 14 is characterized in that the four corners of the low-voltage circuit board have low-voltage circuit board mounting holes to facilitate the installation of the low-voltage circuit board in the low-voltage circuit board box.