[go: up one dir, main page]

CN106057566B - A kind of combination switch and its working method for high-voltage capacitance switching - Google Patents

A kind of combination switch and its working method for high-voltage capacitance switching Download PDF

Info

Publication number
CN106057566B
CN106057566B CN201610467314.1A CN201610467314A CN106057566B CN 106057566 B CN106057566 B CN 106057566B CN 201610467314 A CN201610467314 A CN 201610467314A CN 106057566 B CN106057566 B CN 106057566B
Authority
CN
China
Prior art keywords
switch
phase
control system
voltage
mechanical
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.)
Active
Application number
CN201610467314.1A
Other languages
Chinese (zh)
Other versions
CN106057566A (en
Inventor
徐东晟
邱志人
雷志鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Fuzhou Tianyu Electric Co Ltd
Original Assignee
State Grid Corp of China SGCC
Fuzhou Tianyu Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Fuzhou Tianyu Electric Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201610467314.1A priority Critical patent/CN106057566B/en
Publication of CN106057566A publication Critical patent/CN106057566A/en
Application granted granted Critical
Publication of CN106057566B publication Critical patent/CN106057566B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30Reactive power compensation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Keying Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

It include combination switch control system, diode string and mechanical switch the present invention relates to a kind of NEW TYPE OF COMPOSITE switch and its working method, the combination switch for high-voltage capacitance switching;A, there are two mechanical switch for C two-phase tool: main switch and auxiliary switch, and main switch therein is parallel with a diode string, and B phase then only has an auxiliary mechanical switch and plays buffer action;The combination switch control system, including voltage, current detection circuit, mechanical switch driving circuit, operating mechanism storage capacitor charging control circuit, combination switch status display circuit and numerical control system.The point of zero voltage that combination switch may be implemented in the present invention is opened to be turned off with current zero, eliminates the inrush phenomenon and gate-dividing super-voltage during switching, can also realize operating without arc for mechanical switch;Thyristor string is replaced using diode string simultaneously, compared with traditional combination switch, it does not need complicated trigger circuit, and also there is no damage due to the overvoltage such as lightning stroke mislead.

Description

一种用于高压电容投切的复合开关及其工作方法A composite switch for high-voltage capacitor switching and its working method

技术领域technical field

本发明涉及一种用于高压电容投切的复合开关,属于高压开关领域。The invention relates to a composite switch used for high-voltage capacitor switching, belonging to the field of high-voltage switches.

背景技术Background technique

随着国民经济的快速发展和人们生活水平的不断提高,电网容量和用电设备急剧地增加。由于电力系统的负载大小和分布各不相同,不但改变了电网系统的供电结构,也改变了电网系统的电源分布,给电网系统引入大量无功分量。为了建设资源节约型环境友好型社会,提高电网资源利用率,改善电网供电质量,要对电网系统进行无功补偿。With the rapid development of the national economy and the continuous improvement of people's living standards, the power grid capacity and electrical equipment have increased dramatically. Because the load size and distribution of the power system are different, it not only changes the power supply structure of the power grid system, but also changes the power distribution of the power grid system, and introduces a large amount of reactive power into the power grid system. In order to build a resource-saving and environment-friendly society, improve the utilization rate of power grid resources, and improve the quality of power supply, the power grid system should be compensated for reactive power.

开关投切并联电容器依然是目前电网无功补偿中使用最广的一种方式。此类技术存在的最大缺陷就是投切瞬间存在很大的电压震荡和电流冲击,无法进行开关的频繁投切。解决此问题主要有两种方式,一是采用分相同步开关技术,二是采用复合开关技术。同步开关技术能否在各种条件下达到预期效果,关键在于合分闸相位准确度,但由于受到制造工艺和机构运动分散性的影响,其长期效果并不理想。而复合开关对机构运动分散性的要求则会相对宽松,而且它完全可以利用原有的无功补偿设备,新增设备占地面积小,对原有系统无特殊要求,改造投入较低,可实现补偿装置的过零点频繁投切,适合大量推广应用。Switching of shunt capacitors is still the most widely used method in grid reactive power compensation. The biggest defect of this type of technology is that there is a large voltage shock and current shock at the moment of switching, and frequent switching of the switch cannot be performed. There are two main ways to solve this problem, one is to use split-phase synchronous switching technology, and the other is to use composite switching technology. Whether the synchronous switching technology can achieve the expected effect under various conditions depends on the accuracy of the closing and opening phases. However, due to the influence of the manufacturing process and the dispersion of the movement of the mechanism, its long-term effect is not ideal. The composite switch has relatively loose requirements on the dispersion of the mechanism movement, and it can completely use the original reactive power compensation equipment. It realizes the frequent switching of the zero-crossing point of the compensation device, which is suitable for a large number of popularization and application.

然而,目前常用的复合开关一般采用晶闸管并联机械开关的拓扑结构,由于晶闸管对电压变化率过于敏感,很容易在雷击等过电压情况下误导通而损坏,同时这种结构还需要复杂的触发电路来保证晶闸管触发的同步性,所有这些因素在一定程度上降低了复合开关的可靠性和安全性,限制了其推广使用。However, the commonly used composite switch generally adopts the topology structure of thyristor parallel mechanical switch. Since the thyristor is too sensitive to the voltage change rate, it is easy to be misconnected and damaged under overvoltage conditions such as lightning strikes. At the same time, this structure also requires a complex trigger circuit. To ensure the synchronization of thyristor triggering, all these factors reduce the reliability and safety of the composite switch to a certain extent, and limit its popularization and use.

发明内容SUMMARY OF THE INVENTION

本发明的目的在于克服背景技术中的并联晶闸管串所存在的问题而提供一种双机械开关并联二极管的复合开关。该复合开关利用二极管串来代替晶闸管串承担动态过程,消除了晶闸管串所带来的隐患,提高的复合开关的可靠性和安全性。The purpose of the present invention is to overcome the problems existing in the parallel thyristor string in the background art and provide a composite switch with dual mechanical switches and parallel diodes. The composite switch utilizes the diode string to replace the thyristor string to undertake the dynamic process, eliminates the hidden danger brought by the thyristor string, and improves the reliability and safety of the composite switch.

为实现上述目的,本发明的技术方案:一种用于高压电容投切的复合开关,包括复合开关控制系统、机械开关;所述复合开关控制系统接机械开关;其特征在于:所述机械开关包 A相主开关、C相主开关、A相辅助开关、C相辅助开关、B辅助机械开关;所述A相主开关一端与A相电连接,另一端与A相辅助开关一端连接;A相辅助开关另一端接负载电容;所述C相主开关一端与C相电连接,另一端与C相辅助开关一端连接;C相辅助开关另一端接负载电容;所述B辅助机械一端与C相电连接,另一端与负载电容连接;A相主开关、C相主开关、 A相辅助开关、C相辅助开关、B辅助机械开关的控制端分别与复合开关控制系统连接;所述A相辅助开关、C相辅助开关分别并联一二极管串。In order to achieve the above purpose, the technical solution of the present invention is: a composite switch for high-voltage capacitor switching, comprising a composite switch control system and a mechanical switch; the composite switch control system is connected to a mechanical switch; it is characterized in that: the mechanical switch It includes A-phase main switch, C-phase main switch, A-phase auxiliary switch, C-phase auxiliary switch, and B-phase auxiliary mechanical switch; one end of the A-phase main switch is electrically connected to the A-phase, and the other end is connected to one end of the A-phase auxiliary switch; A The other end of the phase auxiliary switch is connected to the load capacitor; one end of the C-phase main switch is electrically connected to the C-phase, and the other end is connected to one end of the C-phase auxiliary switch; the other end of the C-phase auxiliary switch is connected to the load capacitor; one end of the B auxiliary machine is connected to the C-phase auxiliary switch. The phases are electrically connected, and the other end is connected to the load capacitor; the control ends of the A-phase main switch, the C-phase main switch, the A-phase auxiliary switch, the C-phase auxiliary switch, and the B-phase auxiliary mechanical switch are respectively connected with the composite switch control system; The auxiliary switch and the C-phase auxiliary switch are connected in parallel with a diode string respectively.

进一步的,所述机械开关均为真空机械开关,其操动机构为永磁操动机构或涡流斥力机构。Further, the mechanical switches are all vacuum mechanical switches, and their operating mechanisms are permanent magnet operating mechanisms or eddy current repulsion mechanisms.

进一步的,所述的主控制系统包括电压互感器、电流互感器、信号调理电路、数字控制系统、5个真空机械开关合闸驱动电路、5个真空机械开关分闸驱动电路、5个真空开关电磁操动机构的线圈、复合开关状态显示电路以及机械开关操动机构储能电容充电控制电路;所述电压互感器和信号调理电路用于电压零点和频率的检测,并传递给数字控制系统;所述信号调理电路输入分别电压互感器、电流互感器连接;信号调理电路输出接数字控制系统输入;所述数字控制系统输出分别接5个真空机械开关合闸驱动电路、5个真空机械开关分闸驱动电路、复合开关状态显示电路以及机械开关操动机构储能电容充电控制电路;所述电流互感器和信号调理电路用于电流零点和频率的检测,并传递给数字控制系统;所述复合开关状态显示电路主要用于对复合开关工作状态的监视以及提供相应的故障报警和故障信息;由于真空机械开关的电磁操作机构的合闸时间和分闸时间受其储能电容的初始电压影响,为了减小机械开关动作的分散性,引入储能电容充电控制电路,以保证储能电容初始电压的稳定。Further, the main control system includes a voltage transformer, a current transformer, a signal conditioning circuit, a digital control system, five vacuum mechanical switch closing drive circuits, five vacuum mechanical switch opening drive circuits, and five vacuum switches. The coil of the electromagnetic operating mechanism, the composite switch state display circuit, and the energy storage capacitor charging control circuit of the mechanical switch operating mechanism; the voltage transformer and the signal conditioning circuit are used for the detection of voltage zero point and frequency, and transmitted to the digital control system; The input of the signal conditioning circuit is respectively connected to the voltage transformer and the current transformer; the output of the signal conditioning circuit is connected to the input of the digital control system; the output of the digital control system is respectively connected to five vacuum mechanical switch closing drive circuits, five vacuum mechanical switch dividers Gate drive circuit, composite switch state display circuit and mechanical switch operating mechanism energy storage capacitor charging control circuit; the current transformer and signal conditioning circuit are used for the detection of current zero and frequency, and are transmitted to the digital control system; the composite The switch state display circuit is mainly used to monitor the working state of the composite switch and provide corresponding fault alarms and fault information; since the closing time and opening time of the electromagnetic operating mechanism of the vacuum mechanical switch are affected by the initial voltage of its energy storage capacitor, In order to reduce the dispersion of the mechanical switching action, a charging control circuit of the energy storage capacitor is introduced to ensure the stability of the initial voltage of the energy storage capacitor.

本发明还提供一种基于上述的用于高压电容投切的复合开关的工作方法,其包括以下步骤:S1合闸阶段:接收到合闸指令后,数字控制系统开始对合闸电容进行充电,并对合闸电容的充电时间进行检测,根据充电时间判断是进入合闸程序还是进入故障报警程序;进入合闸程序后,数字控制系统通过电压互感器和信号调理电路对B相电压过零点和频率进行检测,当检测到电压过零点后,立即闭合B辅助机械开关;延时时间t1后闭合C相主开关,C相主开关在tk2.1时间内可靠闭合;再延时时间t2后闭合C相辅助开关,C相辅助开关在tk2.2时间内可靠闭合;再延时时间t3后闭合A相主开关,A相主开关在tk3.1时间内可靠闭合;最后再延时时间t4后闭合A相辅助开关,A相辅助开关在tk3.2时间内可靠闭合;S2分闸阶段:接收到分闸指令后,数字控制系统开始对分闸电容进行充电,并对分闸电容的充电时间进行检测,根据充电时间判断是进入分闸程序还是进入故障报警程序;进入分闸程序后,数字控制系统通过电流互感器和信号调理电路对B相电流过零点和频率进行检测,当检测到电流过零点后,延时时间t5,断开A相辅助开关,使A相支路的负荷电流转移到与A相辅助开关并联的二极管串上,A相辅助开关在ttk3.2时间内分断;再延时时间t6,断开A相主开关,A相主开关在ttk3.1时间内分断;再延时时间t7,断开C相辅助开关;C相辅助开关在ttk2.2时间内分断;再延时时间t8,断开C 相主开关,C相主开关在ttk2.1时间内分断;再延时时间t9,断开B辅助机械开关。The present invention also provides a working method based on the above-mentioned composite switch for high-voltage capacitor switching, which includes the following steps: S1 closing stage: after receiving the closing command, the digital control system starts to charge the closing capacitor, The charging time of the closing capacitor is detected, and according to the charging time, it is judged whether to enter the closing procedure or the fault alarm procedure; The frequency is detected. When the voltage zero-crossing point is detected, the auxiliary mechanical switch B is closed immediately; after the delay time t1, the main switch of phase C is closed, and the main switch of phase C is closed reliably within the time t k2.1 ; after the delay time t2 Close the C-phase auxiliary switch, and the C-phase auxiliary switch is reliably closed within the time of t k2.2 ; after the delay time t3, the A-phase main switch is closed, and the A-phase main switch is reliably closed within the time of t k3.1 ; After time t4, the A-phase auxiliary switch is closed, and the A-phase auxiliary switch is closed reliably within the time of t k3.2 ; S2 opening stage: After receiving the opening command, the digital control system starts to charge the opening capacitor, and then opens the gate. The charging time of the capacitor is detected, and according to the charging time, it is judged whether to enter the opening procedure or the fault alarm procedure; after entering the opening procedure, the digital control system detects the zero-crossing point and frequency of the B-phase current through the current transformer and the signal conditioning circuit. When the current zero-crossing point is detected, the delay time is t5, and the A-phase auxiliary switch is disconnected, so that the load current of the A-phase branch is transferred to the diode string in parallel with the A-phase auxiliary switch, and the A-phase auxiliary switch is at tt k3.2 Break within the time; after delaying time t6, turn off the A-phase main switch, and the A-phase main switch will break within the time of tt k3.1 ; after delaying time t7, turn off the C-phase auxiliary switch; C-phase auxiliary switch at tt k2 .2 time break; then delay time t8, disconnect the C-phase main switch, C-phase main switch breaks within tt k2.1 time; delay time t9, disconnect the B auxiliary mechanical switch.

相较于现有技术,本发明具有以下有益效果:通过一定的时序控制,可以实现复合开关的零电压开通和零电流关断,消除投切过程中的合闸涌流和分闸过电压,同时还可以实现机械开关的无弧操作,提高了机械开关触头的电寿命;采用二极管串来代替晶闸管串,与传统的复合开关相比,它不需要复杂的触发电路,也不存在因雷击等过电压误导通而损坏的问题,减少了电路元件,简化了系统的控制,提高了复合开关的可靠性和安全性。Compared with the prior art, the present invention has the following beneficial effects: through a certain sequence control, the zero-voltage turn-on and zero-current turn-off of the composite switch can be realized, the closing inrush current and the opening overvoltage in the switching process can be eliminated, and at the same time It can also realize the arc-free operation of the mechanical switch and improve the electrical life of the mechanical switch contacts; the diode string is used to replace the thyristor string, compared with the traditional composite switch, it does not need a complex trigger circuit, and there is no lightning strike, etc. The problem of damage caused by overvoltage misconnection reduces circuit components, simplifies system control, and improves the reliability and safety of the composite switch.

附图说明Description of drawings

图1为本发明复合开关拓扑结构(含部分外接电路)的电原理图。FIG. 1 is an electrical schematic diagram of a composite switch topology structure (including some external circuits) of the present invention.

图2为本发明复合开关控制系统的原理框图。FIG. 2 is a schematic block diagram of the composite switch control system of the present invention.

图3为本发明复合开关合闸阶段的控制原理图。FIG. 3 is a control principle diagram of the closing stage of the composite switch of the present invention.

图4为本发明复合开关分闸阶段的控制原理图。FIG. 4 is a control principle diagram of the opening stage of the composite switch of the present invention.

具体实施方式Detailed ways

下面结合附图对本发明的技术方案做进一步说明。The technical solutions of the present invention will be further described below with reference to the accompanying drawings.

一种用于高压电容投切的复合开关,包括复合开关控制系统、机械开关;所述复合开关控制系统接机械开关;所述机械开关包A相主开关、C相主开关、A相辅助开关、C相辅助开关、B辅助机械开关;所述A相主开关一端与A相电连接,另一端与A相辅助开关一端连接;A相辅助开关另一端接分闸电容;所述C相主开关一端与C相电连接,另一端与C相辅助开关一端连接;C相辅助开关另一端接分闸电容;所述B辅助机械一端与C相电连接,另一端与分闸电容连接;A相主开关、C相主开关、A相辅助开关、C相辅助开关、B辅助机械开关的控制端分别与复合开关控制系统连接;所述A相辅助开关、C相辅助开关分别并联一二极管串。A composite switch for high-voltage capacitor switching, comprising a composite switch control system and a mechanical switch; the composite switch control system is connected to a mechanical switch; the mechanical switch includes an A-phase main switch, a C-phase main switch, and an A-phase auxiliary switch , C-phase auxiliary switch, B auxiliary mechanical switch; one end of the A-phase main switch is electrically connected to the A-phase, and the other end is connected to one end of the A-phase auxiliary switch; the other end of the A-phase auxiliary switch is connected to the opening capacitor; the C-phase main switch is connected. One end of the switch is electrically connected to phase C, and the other end is connected to one end of the auxiliary switch of phase C; the other end of the auxiliary switch of phase C is connected to the opening capacitor; one end of the auxiliary machine B is electrically connected to phase C, and the other end is connected to the opening capacitor; A The control terminals of the phase main switch, the C phase main switch, the A phase auxiliary switch, the C phase auxiliary switch and the B auxiliary mechanical switch are respectively connected with the composite switch control system; the A phase auxiliary switch and the C phase auxiliary switch are respectively connected in parallel with a diode string .

进一步的,所述机械开关均为真空机械开关,其操动机构为永磁操动机构或涡流斥力机构。Further, the mechanical switches are all vacuum mechanical switches, and their operating mechanisms are permanent magnet operating mechanisms or eddy current repulsion mechanisms.

如图1,根据图中标识,A、B、C为电力系统三相母线,O为高压无功补偿电容器组支路的中性点,1为真空开关,其中1-1为主开关,1-2为辅助开关,2为二极管串,3为高压无功补偿电容。高压无功补偿电容一般采用星形不接地的接法,当A、C支路的开关均断开时,B相也无法与其他相构成闭合回路,B相相当于没有接入系统。因此,可以通过对闭合和分断顺序的控制,使B相开关不操作负荷电流,所以,可以对B相支路进行精简,移去二极管串和主机械开关,只留下一个辅助开关起隔离作用,从而可以节省设备投资。As shown in Figure 1, according to the identification in the figure, A, B and C are the three-phase busbars of the power system, O is the neutral point of the branch circuit of the high-voltage reactive power compensation capacitor bank, and 1 is the vacuum switch, of which 1-1 is the main switch, and 1 is the main switch. -2 is the auxiliary switch, 2 is the diode string, and 3 is the high voltage reactive power compensation capacitor. The high-voltage reactive power compensation capacitor generally adopts the star-shaped ungrounded connection method. When the switches of the A and C branches are both disconnected, the B phase cannot form a closed loop with other phases, and the B phase is equivalent to not being connected to the system. Therefore, the B-phase switch can not operate the load current through the control of the closing and breaking sequence, so the B-phase branch can be simplified, the diode string and the main mechanical switch can be removed, and only one auxiliary switch is left for isolation. , which can save equipment investment.

下面以图1中A相支路为例(假设此时K1是闭合的),介绍一下本发明复合开关的基本工作原理:利用二极管的反向截止特性实现零电压开通和零电流关断。零电压开通的具体工作过程如下:当A、a两端的电压极性为负时,闭合K3.1,此时,由于二极管处于反向截止状态,主回路电流为零,即K3.1是无弧闭合的;当A、a两端的电压极性翻转时,二极管从反向截止过渡到正向导通状态,此时主开关K3.2仍处于断开位置;在二极管导通之后,闭合主开关K3.2,此时由于二极管处于导通状态,K3.2两端电压被二极管钳位,所以K3.2闭合时也不会产生电弧,即电流从无触点开关切换到了有触点开关,最终实现零电压开通。Taking the A-phase branch in Figure 1 as an example (assuming K1 is closed at this time), the basic working principle of the composite switch of the present invention will be introduced: the reverse cut-off characteristic of the diode is used to realize zero-voltage turn-on and zero-current turn-off. The specific working process of zero-voltage turn-on is as follows: when the voltage polarity at both ends of A and a is negative, close K3.1. At this time, because the diode is in the reverse cut-off state, the main loop current is zero, that is, K3.1 is no. The arc is closed; when the voltage polarities at both ends of A and a are reversed, the diode transitions from the reverse cut-off to the forward conduction state, and the main switch K3.2 is still in the off position; after the diode is turned on, the main switch is closed. K3.2, at this time, since the diode is in a conducting state, the voltage across K3.2 is clamped by the diode, so no arc will be generated when K3.2 is closed, that is, the current is switched from a non-contact switch to a contact switch. Finally, zero-voltage turn-on is realized.

关断过程和开通过程相似,不同的是开通过程是按电压极性控制触头的闭合时序,关断过程是按电流方向来控制触头的分断时序。零电流关断的具体工作过程如下:当A、a两端的电流的方向为从上往下时,断开K3.2,那么电流将逐渐从K3.2转移到二极管上,当A、a两端的电流方向翻转时,由于二极管的反向截止特性,主回路电流将变为零,此时K3.2已处于断开位置,K3.1仍处于合闸位置;在二极管反向截止期间内断开辅助开关K3.1,由于主回路电流为零,K3.1 断开过程不会产生电弧,最终实现零电流关断。The turn-off process is similar to the turn-on process, the difference is that the turn-on process controls the closing sequence of the contacts according to the voltage polarity, and the turn-off process controls the breaking sequence of the contacts according to the current direction. The specific working process of zero-current turn-off is as follows: when the direction of the current at both ends of A and a is from top to bottom, disconnect K3.2, then the current will gradually transfer from K3.2 to the diode. When the current direction of the terminal is reversed, due to the reverse cut-off characteristic of the diode, the main loop current will become zero. At this time, K3.2 is in the disconnected position, and K3.1 is still in the closed position; Turn on the auxiliary switch K3.1. Since the current of the main circuit is zero, no arc will be generated during the disconnection of K3.1, and finally zero-current shutdown will be realized.

进一步的,所述的主控制系统包括电压互感器、电流互感器、信号调理电路、数字控制系统、5个真空机械开关合闸驱动电路、5个真空机械开关分闸驱动电路、5个真空开关电磁操动机构的线圈、复合开关状态显示电路以及机械开关操动机构储能电容充电控制电路;所述电压互感器和信号调理电路用于电压零点和频率的检测,并传递给数字控制系统;所述信号调理电路输入分别电压互感器、电流互感器连接;信号调理电路输出接数字控制系统输入;所述数字控制系统输出分别接5个真空机械开关合闸驱动电路、5个真空机械开关分闸驱动电路、复合开关状态显示电路以及机械开关操动机构储能电容充电控制电路;所述电流互感器和信号调理电路用于电流零点和频率的检测,并传递给数字控制系统;所述复合开关状态显示电路主要用于对复合开关工作状态的监视以及提供相应的故障报警和故障信息;由于真空机械开关的电磁操作机构的合闸时间和分闸时间受其储能电容的初始电压影响,为了减小机械开关动作的分散性,引入储能电容充电控制电路,以保证储能电容初始电压的稳定。Further, the main control system includes a voltage transformer, a current transformer, a signal conditioning circuit, a digital control system, five vacuum mechanical switch closing drive circuits, five vacuum mechanical switch opening drive circuits, and five vacuum switches. The coil of the electromagnetic operating mechanism, the composite switch state display circuit, and the energy storage capacitor charging control circuit of the mechanical switch operating mechanism; the voltage transformer and the signal conditioning circuit are used for the detection of voltage zero point and frequency, and transmitted to the digital control system; The input of the signal conditioning circuit is respectively connected to the voltage transformer and the current transformer; the output of the signal conditioning circuit is connected to the input of the digital control system; the output of the digital control system is respectively connected to five vacuum mechanical switch closing drive circuits, five vacuum mechanical switch dividers Gate drive circuit, composite switch state display circuit and mechanical switch operating mechanism energy storage capacitor charging control circuit; the current transformer and signal conditioning circuit are used for the detection of current zero and frequency, and are transmitted to the digital control system; the composite The switch state display circuit is mainly used to monitor the working state of the composite switch and provide corresponding fault alarms and fault information; since the closing time and opening time of the electromagnetic operating mechanism of the vacuum mechanical switch are affected by the initial voltage of its energy storage capacitor, In order to reduce the dispersion of the mechanical switching action, a charging control circuit of the energy storage capacitor is introduced to ensure the stability of the initial voltage of the energy storage capacitor.

在图2中,标号说明,V为电压互感器,I为电流互感器,N为信号调理电路,G为数字控制系统,H为5个真空机械开关合闸驱动电路,F为5个真空机械开关分闸驱动电路,B为5个真空机械开关的电磁操动机构的线圈,X为复合开关状态显示电路,C为机械开关操动机构储能电容充电控制电路。In Fig. 2, the labels indicate that V is the voltage transformer, I is the current transformer, N is the signal conditioning circuit, G is the digital control system, H is the closing drive circuit of five vacuum mechanical switches, and F is five vacuum mechanical switches. Switch opening drive circuit, B is the coil of the electromagnetic operating mechanism of the five vacuum mechanical switches, X is the composite switch state display circuit, and C is the mechanical switch operating mechanism energy storage capacitor charging control circuit.

从图2中可知,电压互感器V和信号调理电路N主要用于B相电压过零点和频率的检测,为复合开关的零电压开通提供控制依据;电流互感器I和信号调理电路主要用于B相电流过零点和频率的检测,为复合开关的零电流关断提供控制依据;复合开关状态显示电路X主要用于对复合开关工作状态的监视以及提供相应的故障报警和故障信息;由于真空机械开关的电磁操作机构的合闸时间和分闸时间受其储能电容的初始电压影响,为了减小机械开关动作的分散性,引入储能电容充电控制电路C,以保证储能电容初始电压的稳定。It can be seen from Figure 2 that the voltage transformer V and the signal conditioning circuit N are mainly used for the detection of the zero-crossing point and frequency of the B-phase voltage, providing a control basis for the zero-voltage turn-on of the composite switch; the current transformer I and the signal conditioning circuit are mainly used for The detection of the zero-crossing point and frequency of the B-phase current provides a control basis for the zero-current shutdown of the composite switch; the composite switch state display circuit X is mainly used to monitor the working state of the composite switch and provide corresponding fault alarms and fault information; due to the vacuum The closing time and opening time of the electromagnetic operating mechanism of the mechanical switch are affected by the initial voltage of its energy storage capacitor. In order to reduce the dispersion of the mechanical switch action, the energy storage capacitor charging control circuit C is introduced to ensure the initial voltage of the energy storage capacitor. of stability.

本发明的复合开关的工作过程如下:The working process of the composite switch of the present invention is as follows:

1、合闸阶段,接收到合闸指令后,数字控制系统G开始对合闸电容进行充电,并对合闸电容的充电时间进行检测,根据充电时间判断是进入合闸程序还是进入故障报警程序;进入合闸程序后,数字控制系统G通过电压互感器V和信号调理电路N对B相电压过零点和频率进行检测,当检测到电压过零点后,立即闭合K1;延时时间t1后闭合K2.1,为了使K2.2所并联的二极管串在K2.1闭合后所承受的反向耐压不至于过大,应尽量使K2.1在tk2.1这段时间内可靠闭合;再延时时间t2后闭合K2.2,为了保证C相支路电流的可靠换流,K2.2必须在tk2.2这段时间内可靠闭合;再延时时间t3后闭合K3.1,为了使K3.2所并联的二极管串在K3.1闭合后所承受的反向耐压不至于过大,应尽量使K3.1在tk3.1这段时间内可靠闭合;最后再延时时间t4 后闭合K3.2,为了保证,A相支路电流的可靠换流,K3.2必须在tk3.2这段时间内可靠闭合,完成合闸过程,其控制原理如图3所示。1. In the closing stage, after receiving the closing command, the digital control system G starts to charge the closing capacitor, and detects the charging time of the closing capacitor, and judges whether to enter the closing procedure or the fault alarm procedure according to the charging time. ; After entering the closing procedure, the digital control system G detects the zero-crossing point and frequency of the B-phase voltage through the voltage transformer V and the signal conditioning circuit N. When the zero-crossing point of the voltage is detected, K1 is closed immediately; after the delay time t1, it is closed K2.1, in order to prevent the reverse withstand voltage of the diode string connected in parallel with K2.2 from being too large after K2.1 is closed, K2.1 should be closed reliably within the period of t k2.1 ; K2.2 is closed after the delay time t2. In order to ensure the reliable commutation of the C-phase branch current, K2.2 must be closed reliably during the period of t k2.2 ; K3.1 is closed after the delay time t3, In order to prevent the reverse withstand voltage of the diode string connected in parallel with K3.2 from being too large after K3.1 is closed, K3.1 should be closed reliably during the period of t k3.1 as far as possible; K3.2 is closed after time t4. In order to ensure the reliable commutation of the A-phase branch current, K3.2 must be closed reliably during the period of t k3.2 to complete the closing process. The control principle is shown in Figure 3. .

2、分闸阶段,接收到分闸指令后,数字控制系统G开始对分闸电容进行充电,并对分闸电容的充电时间进行检测,根据充电时间判断是进入分闸程序还是进入故障报警程序;进入合闸程序后,数字控制系统G通过电流互感器I和信号调理电路N对B相电流过零点和频率进行检测,当检测到电压过零点后,延时时间t5,断开K3.2,使A相支路的负荷电流转移到与K3.2 并联的二极管串上,为了减小二极管串承受负荷电流的时间,应尽量使K3.2在ttk3.2这段时间内分断;再延时时间t6,断开K3.1,为了减小A相支路二极管串承受反向耐压的峰值,应尽量使K3.1在ttk3.1这段时间内分断;再延时时间t7,断开K2.2,使C相支路的负荷电流转移到与 K2.2并联的二极管串上,为了减小二极管串承受负荷电流的时间,应尽量使K2.2在ttk2.2这段时间内分断;再延时时间t8,断开K2.1,为了减小C相支路二极管串承受反向耐压的峰值,应尽量使K2.1在ttk2.1这段时间内分断;再延时时间t9,断开K1,完成分闸过程,其控制原理如图4所示。2. In the opening stage, after receiving the opening command, the digital control system G starts to charge the opening capacitor, and detects the charging time of the opening capacitor, and judges whether to enter the opening program or the fault alarm program according to the charging time. ; After entering the closing procedure, the digital control system G detects the zero-crossing point and frequency of the B-phase current through the current transformer I and the signal conditioning circuit N. When the voltage zero-crossing point is detected, the delay time t5 is used, and K3.2 is disconnected. , so that the load current of the A-phase branch is transferred to the diode string in parallel with K3.2. In order to reduce the time for the diode string to bear the load current, K3.2 should be disconnected within the period of tt k3.2 ; Delay time t6, disconnect K3.1, in order to reduce the peak value of the reverse withstand voltage of the A-phase branch diode string, K3.1 should be disconnected within the period of tt k3.1 ; delay time t7 , disconnect K2.2, so that the load current of the C-phase branch is transferred to the diode string in parallel with K2.2. In order to reduce the time for the diode string to bear the load current, it is necessary to make K2.2 as close as possible to tt k2.2. Break in a period of time; then delay time t8, disconnect K2.1, in order to reduce the peak value of reverse withstand voltage of the C-phase branch diode string, K2.1 should be broken within the period of tt k2.1 . ; Then delay time t9, disconnect K1, complete the opening process, the control principle is shown in Figure 4.

以上是本发明的较佳实施例,凡依本发明技术方案所作的改变,所产生的功能作用未超出本发明技术方案的范围时,均属于本发明的保护范围。The above are the preferred embodiments of the present invention, all changes made according to the technical solutions of the present invention, when the resulting functional effects do not exceed the scope of the technical solutions of the present invention, belong to the protection scope of the present invention.

Claims (1)

1.一种用于高压电容投切的复合开关的工作方法,所述用于高压电容投切的复合开关包括复合开关控制系统、机械开关;所述复合开关控制系统接机械开关;1. A working method of a composite switch for high-voltage capacitor switching, the composite switch for high-voltage capacitor switching comprises a composite switch control system and a mechanical switch; the composite switch control system is connected to a mechanical switch; 所述机械开关包括A相主开关、C相主开关、A相辅助开关、C相辅助开关、B辅助机械开关;所述A相主开关一端与A相电连接,另一端与A相辅助开关一端连接;A相辅助开关另一端接负载电容;所述C相主开关一端与C相电连接,另一端与C相辅助开关一端连接;C相辅助开关另一端接负载电容;所述B辅助机械开关一端与B相电连接,另一端与负载电容连接;A相主开关、C相主开关、A相辅助开关、C相辅助开关、B辅助机械开关的控制端分别与复合开关控制系统连接;所述A相辅助开关、C相辅助开关分别并联一二极管串;The mechanical switch includes an A-phase main switch, a C-phase main switch, an A-phase auxiliary switch, a C-phase auxiliary switch, and a B-phase auxiliary mechanical switch; one end of the A-phase main switch is electrically connected to the A-phase, and the other end is electrically connected to the A-phase auxiliary switch One end is connected; the other end of the A-phase auxiliary switch is connected with the load capacitor; one end of the C-phase main switch is electrically connected with the C-phase, and the other end is connected with one end of the C-phase auxiliary switch; One end of the mechanical switch is electrically connected to phase B, and the other end is connected to the load capacitor; the control terminals of phase A main switch, phase C main switch, phase A auxiliary switch, phase C auxiliary switch, and auxiliary mechanical switch B are respectively connected to the composite switch control system ; The A-phase auxiliary switch and the C-phase auxiliary switch are connected in parallel with a diode string respectively; 其特征在于:包括以下步骤:It is characterized in that: it comprises the following steps: S1合闸阶段:接收到合闸指令后,数字控制系统开始对合闸电容进行充电,并对合闸电容的充电时间进行检测,根据充电时间判断是进入合闸程序还是进入故障报警程序;进入合闸程序后,数字控制系统通过电压互感器和信号调理电路对B相电压过零点和频率进行检测,当检测到电压过零点后,立即闭合B辅助机械开关;延时时间t1后闭合C相主开关,C相主开关在tk2.1时间内可靠闭合;再延时时间t2后闭合C相辅助开关,C相辅助开关在tk2.2时间内可靠闭合;再延时时间t3后闭合A相主开关,A相主开关在tk3.1时间内可靠闭合;最后再延时时间t4后闭合A相辅助开关,A相辅助开关在tk3.2时间内可靠闭合;S1 closing stage: After receiving the closing command, the digital control system starts to charge the closing capacitor, and detects the charging time of the closing capacitor, and judges whether to enter the closing procedure or the fault alarm procedure according to the charging time; enter After the closing procedure, the digital control system detects the zero-crossing point and frequency of the B-phase voltage through the voltage transformer and the signal conditioning circuit. When the voltage zero-crossing point is detected, the B auxiliary mechanical switch is closed immediately; after the delay time t1, the C-phase is closed. The main switch, the C-phase main switch is reliably closed within t k2.1 ; the C-phase auxiliary switch is closed after the delay time t2, and the C-phase auxiliary switch is closed reliably within the t k2.2 time; after the delay time t3, it is closed A-phase main switch, A-phase main switch is reliably closed within t k3.1 ; finally, A-phase auxiliary switch is closed after delaying time t4, and A-phase auxiliary switch is reliably closed within t k3.2 ; S2分闸阶段:接收到分闸指令后,数字控制系统开始对分闸电容进行充电,并对分闸电容的充电时间进行检测,根据充电时间判断是进入分闸程序还是进入故障报警程序;进入分闸程序后,数字控制系统通过电流互感器和信号调理电路对B相电流过零点和频率进行检测,当检测到电流过零点后,延时时间t5,断开A相辅助开关,使A相支路的负荷电流转移到与A相辅助开关并联的二极管串上,A相辅助开关在ttk3.2时间内分断;再延时时间t6,断开A相主开关,A相主开关在ttk3.1时间内分断;再延时时间t7,断开C相辅助开关;C相辅助开关在ttk2.2时间内分断;再延时时间t8,断开C相主开关,C相主开关在ttk2.1时间内分断;再延时时间t9,断开B辅助机械开关;所述机械开关均为真空机械开关,其操动机构为永磁操动机构或涡流斥力机构;所述的复合开关控制系统包括电压互感器、电流互感器、信号调理电路、数字控制系统、5个真空机械开关合闸驱动电路、5个真空机械开关分闸驱动电路、5个真空开关电磁操动机构的线圈、复合开关状态显示电路以及机械开关操动机构储能电容充电控制电路;所述电压互感器和信号调理电路用于电压零点和频率的检测,并传递给数字控制系统;所述信号调理电路输入分别与电压互感器、电流互感器连接;信号调理电路输出接数字控制系统输入;所述数字控制系统输出分别接5个真空机械开关合闸驱动电路、5个真空机械开关分闸驱动电路、复合开关状态显示电路以及机械开关操动机构储能电容充电控制电路;所述电流互感器和信号调理电路用于电流零点和频率的检测,并传递给数字控制系统;所述复合开关状态显示电路主要用于对复合开关工作状态的监视以及提供相应的故障报警和故障信息;由于真空机械开关的电磁操作机构的合闸时间和分闸时间受其储能电容的初始电压影响,为了减小机械开关动作的分散性,引入储能电容充电控制电路,以保证储能电容初始电压的稳定。S2 opening stage: After receiving the opening command, the digital control system starts to charge the opening capacitor, and detects the charging time of the opening capacitor, and judges whether to enter the opening program or the fault alarm program according to the charging time; enter After the opening procedure, the digital control system detects the current zero-crossing point and frequency of the B-phase through the current transformer and the signal conditioning circuit. The load current of the branch is transferred to the diode string connected in parallel with the A-phase auxiliary switch, and the A-phase auxiliary switch is disconnected within the time of tt k3.2 ; after delaying the time t6, the A-phase main switch is disconnected, and the A-phase main switch is at tt. K3.1 time break; delay time t7, disconnect C-phase auxiliary switch; C-phase auxiliary switch break within tt k2.2 time; delay time t8, disconnect C-phase main switch, C-phase main switch Disconnect within the time of tt k2.1 ; delay time t9 again, disconnect the auxiliary mechanical switch B; the mechanical switches are all vacuum mechanical switches, and their operating mechanisms are permanent magnet operating mechanisms or eddy current repulsion mechanisms; The composite switch control system includes voltage transformers, current transformers, signal conditioning circuits, digital control systems, 5 vacuum mechanical switch closing drive circuits, 5 vacuum mechanical switch opening drive circuits, and 5 vacuum switch electromagnetic operating mechanisms. Coil, composite switch state display circuit and mechanical switch operating mechanism energy storage capacitor charging control circuit; the voltage transformer and signal conditioning circuit are used for voltage zero point and frequency detection, and are transmitted to the digital control system; the signal conditioning circuit The input is respectively connected with the voltage transformer and the current transformer; the output of the signal conditioning circuit is connected with the input of the digital control system; the output of the digital control system is respectively connected with five vacuum mechanical switch closing drive circuits, five vacuum mechanical switch opening drive circuits, Composite switch state display circuit and mechanical switch operating mechanism energy storage capacitor charging control circuit; the current transformer and signal conditioning circuit are used for the detection of current zero point and frequency, and transmitted to the digital control system; the composite switch state display circuit It is mainly used to monitor the working state of the composite switch and provide corresponding fault alarm and fault information; because the closing time and opening time of the electromagnetic operating mechanism of the vacuum mechanical switch are affected by the initial voltage of its energy storage capacitor, in order to reduce the mechanical Due to the dispersion of switching action, the charging control circuit of the energy storage capacitor is introduced to ensure the stability of the initial voltage of the energy storage capacitor.
CN201610467314.1A 2016-06-24 2016-06-24 A kind of combination switch and its working method for high-voltage capacitance switching Active CN106057566B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610467314.1A CN106057566B (en) 2016-06-24 2016-06-24 A kind of combination switch and its working method for high-voltage capacitance switching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610467314.1A CN106057566B (en) 2016-06-24 2016-06-24 A kind of combination switch and its working method for high-voltage capacitance switching

Publications (2)

Publication Number Publication Date
CN106057566A CN106057566A (en) 2016-10-26
CN106057566B true CN106057566B (en) 2019-07-23

Family

ID=57166215

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610467314.1A Active CN106057566B (en) 2016-06-24 2016-06-24 A kind of combination switch and its working method for high-voltage capacitance switching

Country Status (1)

Country Link
CN (1) CN106057566B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107170597A (en) * 2017-07-07 2017-09-15 王仲明 A kind of power switching unit
CN107528371B (en) * 2017-09-25 2020-09-29 北方工业大学 A lithium battery inductive equalization circuit
EP3723110A1 (en) * 2019-04-12 2020-10-14 ABB Schweiz AG Synchronized opening of circuit breaker
CN114649152A (en) * 2022-04-01 2022-06-21 东莞市信捷安物联科技有限公司 Zero-crossing opening method
CN115021244B (en) * 2022-06-10 2024-04-26 国网辽宁省电力有限公司锦州供电公司 Control device and method for preventing user power switch from frequently opening and closing during startup
CN116344258A (en) * 2023-03-24 2023-06-27 广东维能电气有限公司 Isolation vacuum circuit breaker with zero crossing opening and closing function and control system thereof
CN117614095B (en) * 2023-11-14 2024-08-23 滁州学院 Synchronous charging control system of double-coil permanent magnet contactor on-off capacitor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102420431A (en) * 2011-11-28 2012-04-18 吉林市龙华电力技术有限公司 Low-voltage phase control switch for mechanically switching capacitor
CN204270904U (en) * 2014-11-28 2015-04-15 福州大学 A three-phase AC low-voltage arc-free electrical contact device
CN104979837A (en) * 2015-06-23 2015-10-14 北京馨容纵横科技发展有限公司 Two-control-over-three simplified pre-charge synchronous switch circuit of switched capacitor
CN204732885U (en) * 2015-07-16 2015-10-28 郑州泰格电气设备有限公司 Low voltage dynamic reactive-power compensation and intelligent filter device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201215781Y (en) * 2008-06-24 2009-04-01 山东泰开真空开关有限公司 40.5kV permanent magnet sealed indoor high-voltage vacuum circuit breaker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102420431A (en) * 2011-11-28 2012-04-18 吉林市龙华电力技术有限公司 Low-voltage phase control switch for mechanically switching capacitor
CN204270904U (en) * 2014-11-28 2015-04-15 福州大学 A three-phase AC low-voltage arc-free electrical contact device
CN104979837A (en) * 2015-06-23 2015-10-14 北京馨容纵横科技发展有限公司 Two-control-over-three simplified pre-charge synchronous switch circuit of switched capacitor
CN204732885U (en) * 2015-07-16 2015-10-28 郑州泰格电气设备有限公司 Low voltage dynamic reactive-power compensation and intelligent filter device

Also Published As

Publication number Publication date
CN106057566A (en) 2016-10-26

Similar Documents

Publication Publication Date Title
CN106057566B (en) A kind of combination switch and its working method for high-voltage capacitance switching
CN101453106B (en) Solid state toggle switch and method of forced switching for thyristor valve body thereof
EP3745440A1 (en) Oscillating dc circuit breaker based on vacuum interupter with magnetic blow intergrated and breaking method thereof
CN104362751B (en) A kind of intelligence switching switch
CN106300236B (en) One kind isolates pouring-in electric current carry circuit and its application method
CN105356435A (en) Bidirectional-breaking bridge-type circuit breaker and application method thereof
CN206962457U (en) The new fling-cut switch of secondary capacitor
CN102570484B (en) Control method of 10kV switch device
WO2015081615A1 (en) Direct-current circuit breaker
CN107039989A (en) The new fling-cut switch of secondary capacitor
CN104113057A (en) Combined type direct current switch equipment and control method thereof
CN113852056B (en) Economical direct current breaker with pre-current limiting function and control method thereof
CN102946106B (en) Silicon controlled rectifier combination switch
CN106229963B (en) A kind of silicon-controlled control circuit mostly changed to crush-cutting
CN205984788U (en) A novel blend switch for high -pressure electric capacity switching
CN102054632A (en) Split-phase type intelligent low-voltage double-breakpoint integrated electrical appliance with quick electromagnetism repulsive force mechanism
CN202917401U (en) Bi-stable state permanent magnetic switch drive circuit
CN202949231U (en) Intelligent zero-crossing switching silicon controlled combination switch
CN2800620Y (en) Intelligent zero-cross opening or closing gate breaker
CN102957157B (en) Silicon controlled composite switch of intelligent zero-crossing switching
CN108521117B (en) A commutation branch for DC circuit breaker
CN202949229U (en) Controllable silicon composite switch
CN201928031U (en) Synchronous switch for controlling switching of three-phase electric-power capacitor
CN202435041U (en) Intelligent logic control device for reactive power compensation of electric network
CN206619551U (en) Extend the circuit of relay life under a kind of AC network

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant