CN104332961A - Burning proof protection device for switch opening and closing coil - Google Patents
Burning proof protection device for switch opening and closing coil Download PDFInfo
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Abstract
本发明公开了一种开关分合闸线圈防烧保护装置，包括依次串联并形成保护回路的保护开关、电流取样元件、电流判别电路、延时单元、故障判断电路和开关驱动元件；所述保护开关的输入端和电流取样单元的输出端分别与需要防烧保护的分合闸线圈相连，实现保护回路串接至分合闸线圈回路；还包括为保护回路供电的工作电源和用于告警的状态指示，所述状态指示包括电源指示灯、故障指示灯；所述电流取样元件采用霍尔传感器；所述保护开关采用电力电子开关。结构紧凑、体积小巧、加装方便，线路切断可靠彻底，可避免分合闸线圈烧损毁坏，具备保护功能；具备对分合闸线圈回路进行有效的监视功能，保护动作发生有相应告警指示，方便检修人员检查维修。
The invention discloses a switch opening and closing coil anti-burning protection device, which comprises a protection switch connected in series to form a protection circuit, a current sampling element, a current discrimination circuit, a delay unit, a fault judgment circuit and a switch driving element; the protection The input terminal of the switch and the output terminal of the current sampling unit are respectively connected with the opening and closing coils that need anti-burning protection, so as to realize the series connection of the protection circuit to the opening and closing coil circuit; it also includes the working power supply for the protection circuit and the alarm for alarm. The state indication includes a power indicator light and a fault indicator light; the current sampling element adopts a Hall sensor; the protection switch adopts a power electronic switch. Compact structure, small size, convenient installation, reliable and thorough circuit cut-off, which can avoid the opening and closing coil from burning and damage, and has a protection function; it has an effective monitoring function for the opening and closing coil circuit, and there are corresponding alarm indications when the protection action occurs. It is convenient for maintenance personnel to check and maintain.
Description
技术领域 technical field
本发明涉及一种电力系统保护装置，特别是涉及一种开关分合闸线圈防烧保护装置，属于电力系统继电保护领域，具体是对高压断路器分、合闸线圈进行保护的二次回路保护装置。 The invention relates to a power system protection device, in particular to a switch opening and closing coil anti-burning protection device, which belongs to the field of electric system relay protection, and is particularly a secondary circuit for protecting the opening and closing coils of a high-voltage circuit breaker protective device.
背景技术 Background technique
高压断路器在分、合闸操作过程中经常发生分、合闸线圈烧毁的事故。众所周知，分、合闸线圈都是按照短时间通电设计的，它不能长时间通电。分、合闸线圈的烧毁主要是由于断路器辅助接点、断路器电磁机构等故障，而使断路器分、合闸线圈回路的电流不能及时得到正常切断所造成的。 Accidents that the opening and closing coils of high-voltage circuit breakers are often burned during the opening and closing operations. As we all know, the opening and closing coils are designed according to short-time energization, and it cannot be energized for a long time. The burning of the opening and closing coils is mainly due to the failure of the auxiliary contact of the circuit breaker and the electromagnetic mechanism of the circuit breaker, so that the current of the opening and closing coils of the circuit breaker cannot be normally cut off in time.
目前国内电力系统使用的断路器分合、闸线圈回路虽然有一些保护与监视的措施，但是，这些措施要么只能提供简单而不全面的监视，但却不具备保护功能；要么虽然有保护监视功能，但由于设计太复杂，导致安装不便和可靠性不高。 Although there are some protective and monitoring measures for circuit breaker opening and closing and gate coil circuits used in domestic power systems, these measures either only provide simple and incomplete monitoring, but do not have protective functions; Function, but due to the design is too complex, resulting in inconvenient installation and low reliability.
发明内容 Contents of the invention
本发明的主要目的在于，克服现有技术中的不足，提供一种新型结构的开关分合闸线圈防烧保护装置，特别适用于对高压断路器分合闸线圈进行防烧保护。 The main purpose of the present invention is to overcome the deficiencies in the prior art and provide a new structure of switch opening and closing coil anti-burning protection device, which is especially suitable for the anti-burning protection of high-voltage circuit breaker opening and closing coils.
本发明所要解决的技术问题是提供结构紧凑、体积小巧、加装方便、性能可靠、制作成本低、适用范围广的开关分合闸线圈防烧保护装置，不仅线路切断可靠彻底，可避免分合闸线圈烧损毁坏，具备保护功能；而且具备对分合闸线圈回路进行有效的监视功能，保护动作发生有相应告警指示，方便检修人员检查维修，从而保证电力输配电系统的正常运行；极具有产业上的利用价值。 The technical problem to be solved by the present invention is to provide a switch opening and closing coil anti-burn protection device with compact structure, small size, convenient installation, reliable performance, low production cost and wide application range. The brake coil is burnt and damaged, and has a protection function; it also has an effective monitoring function for the opening and closing coil circuit, and there are corresponding alarm indications when the protection action occurs, which is convenient for maintenance personnel to check and repair, thereby ensuring the normal operation of the power transmission and distribution system; extremely It has industrial utilization value.
为了达到上述目的，本发明所采用的技术方案是： In order to achieve the above object, the technical scheme adopted in the present invention is:
一种开关分合闸线圈防烧保护装置，包括依次串联并形成保护回路的保护开关、电流取样元件、电流判别电路、延时单元、故障判断电路和开关驱动元件。 An anti-burn protection device for a switch opening and closing coil, comprising a protection switch connected in series to form a protection circuit, a current sampling element, a current discrimination circuit, a time delay unit, a fault judgment circuit and a switch driving element.
其中，所述保护开关的输入端和电流取样单元的输出端分别与需要防烧保护的分合闸线圈相连，实现保护回路串接至分合闸线圈回路；所述电流取样元件采用霍尔传感器；所述保护开关采用电力电子开关。 Wherein, the input terminal of the protection switch and the output terminal of the current sampling unit are respectively connected to the opening and closing coils that need anti-burning protection, so as to realize the serial connection of the protection circuit to the opening and closing coil circuit; the current sampling element adopts a Hall sensor ; The protection switch adopts a power electronic switch.
同时，还包括为保护回路供电的工作电源和用于告警的状态指示，所述状态指示包括电源指示灯、故障指示灯。 At the same time, it also includes a working power supply for the protection circuit and a status indication for alarming, the status indication includes a power indicator light and a fault indicator light.
本发明进一步设置为：所述保护开关上并接有用于保护回路失电时为分合闸线圈提供防烧保护的失电保护元件。 In the present invention, it is further configured that: the protection switch is connected with a power failure protection element for providing anti-burning protection for the opening and closing coils when the protection circuit loses power.
本发明更进一步设置为：所述失电保护元件为一组机械保护开关，所述机械保护开关用于保护回路所用工作电源出现故障时操作人员进行正常的分合闸操作。 In the present invention, it is further set that: the power failure protection element is a group of mechanical protection switches, and the mechanical protection switches are used for normal opening and closing operations by the operator when the working power supply used by the protection circuit fails.
本发明更进一步设置为：所述机械保护开关包括两组闭合接点，其中一组闭合接点用于与分合闸线圈相连，另一组闭合接点用于与状态指示相连。 The present invention is further provided that: the mechanical protection switch includes two sets of closing contacts, one set of closing contacts is used for connecting with the opening and closing coil, and the other set of closing contacts is used for connecting with the state indication.
本发明更进一步设置为：所述状态指示还包括保护开关切断分合闸线圈回路时，可被驱动点亮的光字牌、和被远动装置驱动的遥信输入回路。 In the present invention, it is further set that: the state indication also includes an optical plate that can be driven to light up when the protection switch cuts off the opening and closing coil circuit, and a remote signal input circuit driven by the remote control device.
本发明更进一步设置为：所述电源指示灯为显示电源正常运行的绿色指示灯。 The present invention is further set as: the power indicator light is a green indicator light showing the normal operation of the power supply.
本发明更进一步设置为：所述故障指示灯为显示保护开关切断分合闸线圈回路的红色指示灯。 The present invention is further set as: the fault indicator light is a red indicator light showing that the protection switch cuts off the opening and closing coil circuit.
本发明的工作原理是：当高压断路器等开关的分合闸线圈回路出现故障、而不能及时切断分合闸操作电流的时候，保护装置经过电流取样、电流判别、在整定的延时时间到达后、电流仍没有消失，即确认分合闸线圈回路出现故障，就立即通过驱动元件来驱动电力电子开关切断分合闸线圈回路的电流，确保分合闸线圈不会因长时间通电而烧毁；切断的同时发出信号指示，用于显示保护开关切断分合闸线圈回路的故障指示灯被点亮。 The working principle of the present invention is: when the opening and closing coil circuit of a switch such as a high-voltage circuit breaker fails and the operating current of the opening and closing cannot be cut off in time, the protection device will reach After that, the current still does not disappear, that is, it is confirmed that the opening and closing coil circuit is faulty, and the power electronic switch is immediately driven by the drive element to cut off the current of the opening and closing coil circuit, so as to ensure that the opening and closing coil will not be burned due to long-term power-on; When it is cut off, a signal indication is sent out, and the fault indicator light used to show that the protection switch cuts off the opening and closing coil circuit is lit.
本发明的保护装置还提供了保护装置自身失电情况的分合闸线圈保护措施，具体要求是当保护装置发生电源故障等情况时不影响开关正常的分合闸操作，通过在保护装置的电力电子开关上并接一组机械保护开关来实现。在保护装置正常工作的情况下，机械保护开关断开而不影响保护装置的正常保护功能；当保护装置出现电源故障等不能正常工作的情况时，机械保护开关则闭合，其中机械保护开关包括两组闭合接点，其一组闭合接点使开关分合闸线圈的回路连接正常，不影响操作人员正常分闸和合闸操作，而另一组闭合接点则点亮光字牌或驱动远动装置的遥信输入回路等状态指示需求。 The protection device of the present invention also provides protection measures for the opening and closing coils of the protection device itself when it loses power. It is realized by connecting a group of mechanical protection switches on the electronic switch. When the protection device is working normally, the mechanical protection switch is disconnected without affecting the normal protection function of the protection device; when the protection device fails to work normally due to power failure, the mechanical protection switch is closed, and the mechanical protection switch includes two A group of closing contacts, one group of closing contacts makes the circuit connection of the switch opening and closing coils normal, which does not affect the normal opening and closing operations of the operator, while the other group of closing contacts lights up the light plate or drives the remote control device. Signal input circuit and other status indication requirements.
与现有技术相比，本发明的有益效果有： Compared with prior art, the beneficial effect of the present invention has:
1、保护装置与分合闸线圈回路串接结构，加装方便，安装调试容易，也有利于更换；更主要的是电流切断可靠彻底，可避免分合闸线圈烧损毁坏，具备保护功能。 1. The protection device is connected in series with the opening and closing coil circuit, which is convenient for installation, easy to install and debug, and is also conducive to replacement; more importantly, the current cut-off is reliable and thorough, which can avoid burning and damage of the opening and closing coil, and has a protective function.
2、使用霍尔传感器对分合闸线圈回路的高压直流操作电流进行取样，确保取样可靠，同时大大拓展保护装置的适应场合。 2. Use the Hall sensor to sample the high-voltage DC operating current of the opening and closing coil circuit to ensure reliable sampling, and at the same time greatly expand the applicable occasions of the protection device.
3、使用电力电子开关器件作为切断故障分合闸线圈回路直流操作电流的保护开关，不仅可减小保护装置的体积、实现结构紧凑，而且提高保护装置的可靠性、延长使用寿命。 3. The use of power electronic switching devices as a protection switch to cut off the DC operating current of the fault opening and closing coil circuit can not only reduce the size of the protection device, realize a compact structure, but also improve the reliability of the protection device and prolong its service life.
4、具备对分合闸线圈回路进行有效的监视功能，保护动作发生有相应告警指示，方便检修人员检查维修，节省了大量排除故障时所需的人力和处理故障的时间，同时故障发生时能保证准确跳闸保护，避免故障扩大，大大缩短停电时间，创造优良的社会效益和经济效益。 4. It has an effective monitoring function for the opening and closing coil circuits, and corresponding alarm indications are provided for protection actions, which is convenient for maintenance personnel to check and maintain, and saves a lot of manpower and time for troubleshooting. Ensure accurate tripping protection, avoid fault expansion, greatly shorten power outage time, and create excellent social and economic benefits.
5、具备失电保护功能，使分合闸线圈得到更全面的可靠保护；而采用延时时间可选的措施满足不同开关分合闸线圈要求，扩大了适用范围。 5. It has the function of power failure protection, so that the opening and closing coils can be more comprehensively and reliably protected; and the optional delay time is adopted to meet the requirements of different switch opening and closing coils, expanding the scope of application.
上述内容仅是本发明技术方案的概述，为了更清楚的了解本发明的技术手段，下面结合附图对本发明作进一步的描述。 The above content is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, the present invention will be further described below in conjunction with the accompanying drawings.
附图说明 Description of drawings
图1为本发明开关分合闸线圈防烧保护装置的结构原理图。 Fig. 1 is a structural principle diagram of the switch opening and closing coil anti-burning protection device of the present invention.
具体实施方式 Detailed ways
下面结合说明书附图，对本发明作进一步的说明。 Below in conjunction with accompanying drawing of description, the present invention will be further described.
如图1所示，一种开关分合闸线圈防烧保护装置，包括依次串联并形成保护回路的保护开关、电流取样元件、电流判别电路、延时单元、故障判断电路和开关驱动元件。 As shown in Figure 1, a switch opening and closing coil anti-burning protection device includes a protection switch connected in series to form a protection circuit, a current sampling element, a current discrimination circuit, a delay unit, a fault judgment circuit and a switch drive element.
其中，所述保护开关的输入端和电流取样单元的输出端分别与需要防烧保护的分合闸线圈相连，实现保护回路串接至分合闸线圈回路；所述电流取样元件采用霍尔传感器；所述保护开关采用电力电子开关。 Wherein, the input terminal of the protection switch and the output terminal of the current sampling unit are respectively connected to the opening and closing coils that need anti-burning protection, so as to realize the serial connection of the protection circuit to the opening and closing coil circuit; the current sampling element adopts a Hall sensor ; The protection switch adopts a power electronic switch.
同时，还包括为保护回路供电的工作电源和用于告警的状态指示，所述状态指示包括电源指示灯、故障指示灯；所述电源指示灯为显示电源正常运行的绿色指示灯；所述故障指示灯为显示保护开关切断分合闸线圈回路的红色指示灯。所述状态指示还包括保护开关切断分合闸线圈回路时，可被驱动点亮的光字牌、和被远动装置驱动的遥信输入回路。 At the same time, it also includes a working power supply for the protection circuit and a status indicator for alarming, the status indicator includes a power indicator light and a fault indicator light; the power indicator light is a green indicator light showing the normal operation of the power supply; The indicator light is a red indicator light showing that the protection switch cuts off the opening and closing coil circuit. The status indication also includes a light plate that can be driven to light up when the protection switch cuts off the opening and closing coil circuit, and a remote signaling input circuit driven by the remote control device.
当开关分合闸线圈回路由于机械故障等原因而不能及时切断回路操作电流的时候，保护装置经过电流取样、判别、延时、故障判别后，如在整定的延时时间到达后、电流仍没有消失，即确认分合闸线圈回路出现故障，就立即通过驱动元件来驱动电力电子开关切断分合闸线圈回路的电流，使分合闸线圈不至于长时间通电而烧毁，从而保护了分合闸线圈；保护装置的电力电子开关切断分合闸线圈回路操作电流的同时，点亮安设在保护装置面板上的用于显示切断状态的红色指示灯，并驱动继电器点亮光字牌或者驱动远动装置的遥信输入回路，以表示某开关分闸线圈或者合闸线圈回路出现了故障，便于现场工作人员及时查找并排除故障。 When the switch opening and closing coil circuit cannot cut off the operating current of the circuit in time due to mechanical failure and other reasons, after the protection device has undergone current sampling, identification, delay, and fault identification, if the current delay time is reached, the current still does not stop. If it is confirmed that the opening and closing coil circuit is faulty, it will immediately drive the power electronic switch to cut off the current of the opening and closing coil circuit through the driving element, so that the opening and closing coil will not be energized for a long time and burn out, thereby protecting the opening and closing coil. coil; while the power electronic switch of the protection device cuts off the operating current of the opening and closing coil circuit, it lights up the red indicator light installed on the panel of the protection device to display the cut-off state, and drives the relay to light up the light plate or drive the remote The remote signal input circuit of the actuator is used to indicate that a switch opening coil or closing coil circuit has a fault, which is convenient for the on-site staff to find and eliminate the fault in time.
为了保证当保护装置发生电源故障等情况时不影响开关正常分合闸操作，所述保护开关上并接有用于保护回路失电时为分合闸线圈提供防烧保护的失电保护元件；所述失电保护元件为一组机械保护开关。 In order to ensure that the normal opening and closing operation of the switch is not affected when the power failure of the protection device occurs, the protection switch is connected with a power failure protection element for providing anti-burning protection for the opening and closing coil when the protection circuit loses power; The power failure protection element is a group of mechanical protection switches.
在保护装置正常工作的情况下，机械保护开关断开而不影响保护装置的正常保护功能；当保护装置出现电源故障等不能正常工作的情况时，机械保护开关则闭合。所述机械保护开关包括两组闭合接点，其中一组闭合接点使开关分合闸线圈的回路连接正常，不影响操作人员正常分闸和合闸操作，而另一组闭合接点则点亮光字牌或驱动远动装置的遥信输入回路等状态指示需求。 When the protection device is working normally, the mechanical protection switch is disconnected without affecting the normal protection function of the protection device; when the protection device fails to work normally due to power failure, the mechanical protection switch is closed. The mechanical protection switch includes two sets of closed contacts, one set of closed contacts makes the circuit connection of the switch opening and closing coils normal, which does not affect the normal opening and closing operations of the operator, while the other set of closed contacts lights up the light plate Or the status indication requirements such as the remote signal input circuit for driving the remote control device.
在电力系统继电保护及自动控制系统中，电参量的采集取样是必不可少的环节，同时也是影响保护装置整体性能的重要环节。本发明的保护装置采用霍尔传感器来对分合闸线圈回路的操作电流进行取样，一方面解决了直流电参量取样测量时的隔离问题，另一方面由于霍尔传感器体积小、线性度好、线性范围宽等优点，大大拓展了保护装置的适应范围及适用场合。 In the power system relay protection and automatic control system, the collection and sampling of electrical parameters is an indispensable link, and it is also an important link that affects the overall performance of the protection device. The protection device of the present invention uses a Hall sensor to sample the operating current of the opening and closing coil circuit. On the one hand, it solves the isolation problem when sampling and measuring DC parameters. The wide range and other advantages greatly expand the scope of application and applicable occasions of the protection device.
传统的切断各种信号的开关都采用机械继电器的方法，使用机械继电器虽然成本较低、驱动电路简单，但在切断高压直流电流的时候继电器的接点容量和继电器体积是一对矛盾，一般体积较大、不易现场安装调试，而且在切断回路的瞬间由于拉弧的作用继电器接点很容易发生粘连而无法切断。本发明的保护装置采用高压电力电子开关来切断故障线圈回路的直流操作电流。利用电力电子开关没有机械触点，在切断高压信号的时候没有拉弧现象，因此，用非常小的体积的电力电子开关就能够可靠的切断几百乃至上千瓦的直流功率，不但使保护装置的体积可以做的很小，使保护装置的可靠性得到大幅提高，也大大拓展了保护装置的适应范围。 Traditional switches for cutting off various signals use mechanical relays. Although the cost of using mechanical relays is low and the drive circuit is simple, there is a contradiction between the contact capacity of the relay and the volume of the relay when cutting off the high-voltage direct current. Generally, the volume is relatively large. Large, difficult to install and debug on site, and at the moment of cutting off the circuit, the relay contacts are prone to adhesion due to the effect of arcing and cannot be cut off. The protection device of the present invention uses a high-voltage power electronic switch to cut off the DC operating current of the faulty coil circuit. There is no mechanical contact in the power electronic switch, and there is no arcing phenomenon when cutting off the high-voltage signal. Therefore, a very small power electronic switch can reliably cut off hundreds or even thousands of watts of DC power, which not only makes the protective device The volume can be made very small, so that the reliability of the protection device is greatly improved, and the application range of the protection device is also greatly expanded.
本发明的保护装置可达到的技术指标：电源输入范围测试可满足额定电压的±20%范围要求；装置耐压性能测试为2000V、1分钟；承受的最大电流不小于5A；最大电流时装置的压降不大于1.5V；延时的时间及精度分别为0.1秒-0.5秒5级可选、精度优于±5%；抗干扰性能测试表现为被控线圈回路施加干扰小电流、装置可靠不动作。 The technical indicators that the protection device of the present invention can achieve: the power input range test can meet the ±20% range requirement of the rated voltage; the device withstand voltage performance test is 2000V, 1 minute; the maximum current it can bear is not less than 5A; The voltage drop is not greater than 1.5V; the delay time and accuracy are 0.1 seconds to 0.5 seconds, 5 levels are optional, and the accuracy is better than ±5%; the anti-interference performance test shows that the controlled coil circuit applies a small interference current, and the device is reliable. action.
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内，当可利用上述揭示的技术内容做出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何的简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。 The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the technical content disclosed above to make some changes or modify them into equivalent embodiments with equivalent changes. Technical Essence of the Invention Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solutions of the present invention.
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| CN113746067A (en) * | 2021-08-27 | 2021-12-03 | 南方电网科学研究院有限责任公司 | Protection device of GIS opening and closing coil |
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