CN105281300A - Arc light protection on-line monitoring method - Google Patents
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Abstract
本发明公开了一种电弧光保护在线监测方法，电弧光保护装置通过弧光传感器对第一变压器端进行实时弧光检测，检测是否有弧光，通过第一电流传感器实时监控第一变压器的电流信号，检测电流增量；若检测到弧光或电流异常，并通过整流、滤波、阈值比较处理，确认异常报警后，电弧光保护装置断开第一变压器的高压侧断路器或低压侧断路器；电流保护单元通过弧光传感器对第二变压器端进行实时弧光检测，检测是否有弧光，通过第二电流传感器实时监控第二变压器的电流信号，检测电流增量；若检测到弧光或电流异常，并通过整流、滤波、阈值比较处理，确认异常报警后，电流保护单元断开第二变压器的高压侧断路器或低压侧断路器。
The invention discloses an online monitoring method for arc light protection. The arc light protection device performs real-time arc light detection on the first transformer end through an arc light sensor to detect whether there is arc light, and monitors the current signal of the first transformer in real time through the first current sensor to detect Current increment; if an arc or current abnormality is detected, rectification, filtering, and threshold value comparison are processed, and after the abnormal alarm is confirmed, the arc protection device disconnects the high-voltage side circuit breaker or low-voltage side circuit breaker of the first transformer; current protection unit Real-time arc detection is performed on the second transformer terminal through the arc sensor to detect whether there is an arc, and the second current sensor is used to monitor the current signal of the second transformer in real time to detect the current increment; . Threshold value comparison processing, after confirming the abnormal alarm, the current protection unit disconnects the high-voltage side circuit breaker or the low-voltage side circuit breaker of the second transformer.
Description
技术领域 technical field
本发明涉及弧光保护领域，特别是涉及一种电弧光保护在线监测方法。 The invention relates to the field of arc protection, in particular to an online monitoring method for arc protection.
背景技术 Background technique
在电力系统中，35kV及以下电压等级的母线一般未装设母线保护。然而，由于中低压母线上的出线多，操作频繁，三相导体线间距离与大地的距离比较近，容易受小动物危害，设备制造质量比高压设备差，设备绝缘老化和机械磨损，运行条件恶劣，系统运行条件改变，人为和操作错误等原因，中低压母线的故障几率比高压、超高压母线高得多。但长期以来，人们对中低压母线的保护一直不够重视，也未发现先进合理的解决方案，因此，大多采用带有较大延时的后备保护来切除母线上的故障，往往使故障被发展、扩大，从而造成巨大的经济损失。近年来，由于各种原因中低压开关设备被严重烧毁，有的甚至发展成严重的火灾灾害，而主变压器由于遭受外部短路电流冲击损坏的事故也逐年增加，这些配网事故处理不当甚至被扩大发展为输电网事故，造成重大的经济损失，已引起电力部门的广泛关注。究其原因大多是因为没有装设中低压母线保护，未能快速切除故障所造成。所以，为了保证变压器及母线开关设备的安全运行，根据继电保护快速性的要求，迫切需要配置专用中低压母线保护的又能同时保护母线与馈线的主控型一种电弧光保护在线监测方法。 In the power system, busbars with a voltage level of 35kV and below are generally not equipped with busbar protection. However, due to the large number of outgoing lines on the medium and low voltage busbars, frequent operations, and the distance between the three-phase conductor lines and the earth is relatively close, it is easy to be harmed by small animals, and the quality of equipment manufacturing is worse than that of high-voltage equipment. Poor conditions, changes in system operating conditions, human and operational errors and other reasons, the failure probability of medium and low voltage buses is much higher than that of high voltage and ultra high voltage buses. But for a long time, people have not paid enough attention to the protection of medium and low voltage buses, and no advanced and reasonable solutions have been found. expansion, resulting in huge economic losses. In recent years, due to various reasons, medium and low-voltage switchgears have been severely burned, and some have even developed into serious fire disasters. The accidents of main transformers damaged by external short-circuit current impacts have also increased year by year, and these distribution network accidents have been improperly handled and even enlarged. It has developed into a transmission network accident and caused significant economic losses, which has aroused widespread concern in the power sector. The reason is mostly because there is no medium and low voltage busbar protection, and the failure to quickly remove the fault is caused. Therefore, in order to ensure the safe operation of transformers and busbar switchgear, according to the requirements of rapidity of relay protection, it is urgent to configure a special medium and low voltage busbar protection and protect the busbar and feeder at the same time. A master-controlled arc protection online monitoring method .
发明内容 Contents of the invention
本发明的目的在于克服现有技术的不足，提供一种电弧光保护在线监测方法。 The purpose of the present invention is to overcome the deficiencies of the prior art and provide an online monitoring method for arc light protection.
本发明的目的是通过以下技术方案来实现的：一种电弧光保护在线监测方法，包括以下多个步骤： The object of the present invention is achieved through the following technical solutions: an online monitoring method for arc protection, comprising the following multiple steps:
S1，电弧光保护装置通过弧光传感器对第一变压器端进行实时弧光检测，检测是否有弧光，通过第一电流传感器实时监控第一变压器的电流信号，检测电流增量；若检测到弧光或电流异常，并通过整流、滤波、阈值比较处理，确认异常报警后，电弧光保护装置断开第一变压器的高压侧断路器或低压侧断路器。 S1, the arc light protection device performs real-time arc light detection on the first transformer end through the arc light sensor to detect whether there is an arc light, and monitors the current signal of the first transformer in real time through the first current sensor to detect the current increment; if arc light or current abnormality is detected , and through rectification, filtering, and threshold value comparison processing, after confirming the abnormal alarm, the arc light protection device disconnects the high-voltage side circuit breaker or low-voltage side circuit breaker of the first transformer.
S2，电流保护单元通过弧光传感器对第二变压器端进行实时弧光检测，检测是否有弧光，通过第二电流传感器实时监控第二变压器的电流信号，检测电流增量；若检测到弧光或电流异常，并通过整流、滤波、阈值比较处理，确认异常报警后，电流保护单元断开第二变压器的高压侧断路器或低压侧断路器。 S2, the current protection unit performs real-time arc detection on the second transformer end through the arc sensor to detect whether there is an arc, monitors the current signal of the second transformer in real time through the second current sensor, and detects the current increment; if an arc or current is detected abnormally, And through rectification, filtering, and threshold value comparison processing, after confirming the abnormal alarm, the current protection unit disconnects the high-voltage side circuit breaker or the low-voltage side circuit breaker of the second transformer.
S3，电弧光保护装置和电流保护单元通过交换机相互通信。 S3, the arc protection device and the current protection unit communicate with each other through the switch.
S4，电弧光保护装置还通过交换机与多个弧光扩展单元进行相互通信，弧光扩展单元通过弧光传感器分别对第一低压母线下的被监测设备和第二低压母线下的被监测设备进行弧光检测。 S4, the arc protection device also communicates with multiple arc extension units through the switch, and the arc extension units respectively perform arc detection on the monitored equipment under the first low-voltage bus and the monitored equipment under the second low-voltage bus through the arc sensor.
S401，若检测到第一低压母线下的被监测设备出现弧光报警时，电弧光保护装置断开该第一低压母线下的被监测设备的电源，并断开母联断路器，隔离第一低压母线和第二低压母线。 S401. If an arc alarm is detected on the monitored equipment under the first low-voltage bus, the arc protection device disconnects the power supply of the monitored equipment under the first low-voltage bus, and disconnects the bus tie circuit breaker to isolate the first low-voltage bus. busbar and the second low-voltage busbar.
S402，若检测到第二低压母线下的被监测设备出现弧光报警时，电弧光保护装置断开该第二低压母线下的被监测设备的电源，并断开母联断路器，隔离第一低压母线和第二低压母线。 S402. If an arc alarm is detected on the monitored equipment under the second low-voltage bus, the arc protection device disconnects the power supply of the monitored equipment under the second low-voltage bus, and disconnects the bus tie circuit breaker to isolate the first low-voltage bus. busbar and the second low-voltage busbar.
进一步的，所述电弧光保护装置还通过馈线保护单元集中馈电保护，电弧光保护装置还通过工况监测单元实时监测被监测设备所处的环境状况。 Further, the arc protection device also uses the feeder protection unit for centralized feeding protection, and the arc protection device also monitors the environmental conditions of the monitored equipment in real time through the working condition monitoring unit.
进一步的，所述工况监测单元包括温湿度传感器、无线温度传感器、可燃气体传感器、无线湿度传感器、漏电流检测单元和漏电流传感器。 Further, the working condition monitoring unit includes a temperature and humidity sensor, a wireless temperature sensor, a combustible gas sensor, a wireless humidity sensor, a leakage current detection unit and a leakage current sensor.
本发明的有益效果是：本发明采用分布式模式设计，适合作为中低压双母线保护，具备灵活的组网特性。其中馈线保护单元可独立形成最小化保护系统，单独保护馈线以减小事故停电范围。馈线单元也可运行于集中监控模式，通过电弧光保护装置调度通信。本发明电弧光保护采用检测弧光和电流为输入量，可单独做为过流保护，纯弧光保护，及弧光与过流双判据保护。本系统具有原理简单、动作可靠迅速、对一次设备无特殊要求、适应于各种运行方式的优点。 The beneficial effects of the present invention are: the present invention adopts a distributed mode design, is suitable for medium and low voltage double busbar protection, and has flexible networking characteristics. Among them, the feeder protection unit can independently form a minimum protection system, and protect the feeder alone to reduce the scope of accidental power outages. The feeder unit can also operate in a centralized monitoring mode, dispatching communication through the arc protection device. The arc light protection of the present invention adopts the detection of arc light and current as input, and can be used as overcurrent protection, pure arc light protection, and double criterion protection of arc light and overcurrent. This system has the advantages of simple principle, reliable and rapid action, no special requirements for primary equipment, and adaptable to various operating modes.
附图说明 Description of drawings
图1为本发明电弧光保护系统的系统结构图； Fig. 1 is the system structural diagram of arc protection system of the present invention;
图2为本发明电弧光保护装置的前面板示意图； Fig. 2 is the schematic diagram of the front panel of the arc protection device of the present invention;
图中，1-机壳，2-液晶显示屏，3-LED指示灯，4-功能按键，5-向导按键，6-安装板。 In the figure, 1-casing, 2-LCD display, 3-LED indicator, 4-function buttons, 5-wizard buttons, 6-installation board.
具体实施方式 detailed description
下面结合附图进一步详细描述本发明的技术方案，但本发明的保护范围不局限于以下所述。 The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.
一种电弧光保护在线监测方法，包括以下多个步骤： An online monitoring method for arc protection, comprising the following multiple steps:
S1，电弧光保护装置通过弧光传感器对第一变压器端进行实时弧光检测，检测是否有弧光，通过第一电流传感器实时监控第一变压器的电流信号，检测电流增量；若检测到弧光或电流异常，并通过整流、滤波、阈值比较处理，确认异常报警后，电弧光保护装置断开第一变压器的高压侧断路器或低压侧断路器。 S1, the arc light protection device performs real-time arc light detection on the first transformer end through the arc light sensor to detect whether there is an arc light, and monitors the current signal of the first transformer in real time through the first current sensor to detect the current increment; if arc light or current abnormality is detected , and through rectification, filtering, and threshold value comparison processing, after confirming the abnormal alarm, the arc light protection device disconnects the high-voltage side circuit breaker or low-voltage side circuit breaker of the first transformer.
S2，电流保护单元通过弧光传感器对第二变压器端进行实时弧光检测，检测是否有弧光，通过第二电流传感器实时监控第二变压器的电流信号，检测电流增量；若检测到弧光或电流异常，并通过整流、滤波、阈值比较处理，确认异常报警后，电流保护单元断开第二变压器的高压侧断路器或低压侧断路器。 S2, the current protection unit performs real-time arc detection on the second transformer end through the arc sensor to detect whether there is an arc, monitors the current signal of the second transformer in real time through the second current sensor, and detects the current increment; if an arc or current is detected abnormally, And through rectification, filtering, and threshold value comparison processing, after confirming the abnormal alarm, the current protection unit disconnects the high-voltage side circuit breaker or the low-voltage side circuit breaker of the second transformer.
S3，电弧光保护装置和电流保护单元通过交换机相互通信。 S3, the arc protection device and the current protection unit communicate with each other through the switch.
S4，电弧光保护装置还通过交换机与多个弧光扩展单元进行相互通信，弧光扩展单元通过弧光传感器分别对第一低压母线下的被监测设备和第二低压母线下的被监测设备进行弧光检测。 S4, the arc protection device also communicates with multiple arc extension units through the switch, and the arc extension units respectively perform arc detection on the monitored equipment under the first low-voltage bus and the monitored equipment under the second low-voltage bus through the arc sensor.
S401，若检测到第一低压母线下的被监测设备出现弧光报警时，电弧光保护装置断开该第一低压母线下的被监测设备的电源，并断开母联断路器，隔离第一低压母线和第二低压母线。 S401. If an arc alarm is detected on the monitored equipment under the first low-voltage bus, the arc protection device disconnects the power supply of the monitored equipment under the first low-voltage bus, and disconnects the bus tie circuit breaker to isolate the first low-voltage bus. busbar and the second low-voltage busbar.
S402，若检测到第二低压母线下的被监测设备出现弧光报警时，电弧光保护装置断开该第二低压母线下的被监测设备的电源，并断开母联断路器，隔离第一低压母线和第二低压母线。 S402. If an arc alarm is detected on the monitored equipment under the second low-voltage bus, the arc protection device disconnects the power supply of the monitored equipment under the second low-voltage bus, and disconnects the bus tie circuit breaker to isolate the first low-voltage bus. busbar and the second low-voltage busbar.
进一步的，所述电弧光保护装置还通过馈线保护单元集中馈电保护，电弧光保护装置还通过工况监测单元实时监测被监测设备所处的环境状况。 Further, the arc protection device also uses the feeder protection unit for centralized feeding protection, and the arc protection device also monitors the environmental conditions of the monitored equipment in real time through the working condition monitoring unit.
进一步的，所述工况监测单元包括温湿度传感器、无线温度传感器、可燃气体传感器、无线湿度传感器、漏电流检测单元和漏电流传感器。 Further, the working condition monitoring unit includes a temperature and humidity sensor, a wireless temperature sensor, a combustible gas sensor, a wireless humidity sensor, a leakage current detection unit and a leakage current sensor.
如图1所示，图1为本发明电弧光保护监测方法所依赖的实时分布式监测系统，包括电弧光保护装置、一个或多个弧光扩展单元、弧光传感器、电流保护单元、馈线保护单元和工况监测单元，所述电弧光保护装置通过交换机分别与电流保护单元和一个或多个弧光扩展单元连接，所述弧光扩展单元与多个弧光传感器连接。 As shown in Figure 1, Figure 1 is a real-time distributed monitoring system on which the arc protection monitoring method of the present invention depends, including an arc protection device, one or more arc extension units, an arc sensor, a current protection unit, a feeder protection unit and A working condition monitoring unit, the arc protection device is respectively connected to the current protection unit and one or more arc extension units through a switch, and the arc extension unit is connected to a plurality of arc sensors.
电弧光保护装置是电弧光保护系统的核心，负责系统的信息汇集、逻辑分析、故障判断及跳闸控制，同时管理所有扩展单元，也可对馈线单元进行集中监控。 The arc protection device is the core of the arc protection system. It is responsible for information collection, logic analysis, fault judgment and trip control of the system. At the same time, it manages all expansion units and can also perform centralized monitoring of feeder units.
馈线保护单元可采集4路弧光，4路TA电流采集通道，即最大可实现相邻2条馈线的弧光和电流保护，实现快速切断故障。 The feeder protection unit can collect 4 channels of arc light and 4 channels of TA current collection channels, that is, it can realize the arc light and current protection of two adjacent feeders at most, and quickly cut off the fault.
弧光扩展单元：可扩展16路弧光采集通道。 Arc extension unit: 16 arc acquisition channels can be expanded.
电流保护单元：可扩展6路TA电流采集通道及跳闸通道。 Current protection unit: 6 TA current acquisition channels and tripping channels can be expanded.
电弧传感器：负责检测弧光信息，将弧光强度转换为数字信号。 Arc sensor: responsible for detecting arc light information and converting arc light intensity into digital signal.
本发明中所述电弧光保护装置通过交换机分别与电流保护单元和一个或多个弧光扩展单元连接，所述弧光扩展单元与多个弧光传感器连接。 The arc protection device in the present invention is respectively connected to the current protection unit and one or more arc extension units through a switch, and the arc extension unit is connected to a plurality of arc sensors.
进一步的，所述电弧光保护装置的跳闸输出端口分别与第一变压器的高压端和低压端的断路器及母联断路器连接，所述电弧光保护装置的电流检测端通过电流线与第一变压器的低压侧的第一电流传感器连接，所述电弧光保护装置的弧光传感输入接口也与多个弧光传感器连接。 Further, the tripping output ports of the arc protection device are respectively connected to the circuit breakers at the high-voltage end and low-voltage end of the first transformer and the bus-tie circuit breaker, and the current detection end of the arc protection device is connected to the first transformer through a current line. The first current sensor on the low-voltage side of the arc protection device is also connected to a plurality of arc sensors.
进一步的，所述电流保护单元的跳闸输出端口分别与第二变压器的高压端和低压端的断路器连接，所述电弧光保护装置的电流检测端通过电流线与第二变压器的低压侧的第二电流传感器连接。 Further, the tripping output port of the current protection unit is respectively connected to the circuit breaker at the high-voltage end and the low-voltage end of the second transformer, and the current detection end of the arc protection device is connected to the second Current sensor connection.
进一步的，所述第一低压母线通过母联断路器与第二低压母线连接，所述电弧光保护装置还与馈线保护单元和工况监测单元连接。 Further, the first low-voltage bus is connected to the second low-voltage bus through a tie circuit breaker, and the arc protection device is also connected to a feeder protection unit and a working condition monitoring unit.
进一步的，如图2所示，所述电弧光保护装置包括机壳1和内部电路板，所述机壳1的主面板上设有液晶显示屏2、多种LED指示灯3、功能按键4和向导按键5，所述机壳1的后面板上设有交流电输入接口、弧光传感输入接口、跳闸输出端口、时钟同步接口、通信接口、监控接口、扩展接口和环境数据输入接口； Further, as shown in Figure 2, the arc protection device includes a casing 1 and an internal circuit board, and the main panel of the casing 1 is provided with a liquid crystal display 2, various LED indicator lights 3, and function buttons 4 and wizard button 5, the rear panel of the casing 1 is provided with an AC input interface, an arc sensor input interface, a trip output port, a clock synchronization interface, a communication interface, a monitoring interface, an expansion interface and an environmental data input interface;
进一步的，所述LED指示灯3包括电源指示灯、运行指示灯、同步指示灯、装置异常指示灯、环境监测指示灯、电流越限指示灯、弧光越限指示灯、跳闸指示灯和检修指示灯。 Further, the LED indicator light 3 includes a power indicator light, a running indicator light, a synchronization indicator light, an abnormal device indicator light, an environmental monitoring indicator light, a current limit indicator light, an arc light limit light indicator, a trip indicator light and a maintenance indicator lamp.
其中，电源指示灯、运行指示灯和同步指示灯均可采用绿灯，有电时电源指示灯亮，有程序运行时运行指示灯以2Hz闪烁，当时间同步后同步指示灯亮。 Among them, the power indicator light, the running indicator light and the synchronization indicator light can all be green lights. The power indicator light is on when there is power, and the running indicator light flashes at 2Hz when there is a program running. When the time is synchronized, the synchronization indicator light is on.
装置异常指示灯、电流越限指示灯、弧光越限指示灯和跳闸指示灯可采用红灯，当装置异常时装置异常指示灯亮，当电流长时越限时电流越限指示灯亮，当弧光长时越限时弧光越限指示灯亮，当装置跳闸后跳闸指示灯亮。 Device abnormal indicator light, current limit indicator light, arc light limit indicator light and trip indicator light can be red lights. When the device is abnormal, the device abnormal indicator light is on. When the limit is exceeded, the arc light limit indicator light is on, and the trip indicator light is on when the device trips.
环境监测指示灯和检修指示灯可采用黄灯，当环境监测报警时环境监测指示灯亮，当装置设置为检修时检修指示灯亮。 The environmental monitoring indicator light and the maintenance indicator light can adopt yellow lights, and the environmental monitoring indicator light is on when the environment monitoring alarm is issued, and the maintenance indicator light is on when the device is set to maintenance.
进一步的，所述功能按键4包括返回按键F1、上一功能页面按键F2、下一功能页面按键F3、返回主界面按键F4和复位按键。 Further, the function keys 4 include a return key F1, a previous function page key F2, a next function page key F3, a return main interface key F4 and a reset key.
进一步的，所述向导按键5包括方向上按键、方向下按键、方向左按键、方向右按键和确认OK键。 Further, the guide button 5 includes an up button, a down button, a left button, a right button and an OK button.
所述功能按键4和/或向导按键5为触摸按键，所述液晶显示屏2为触摸显示屏。进一步的，所述触摸按键和触摸显示屏集为一体。 The function keys 4 and/or guide keys 5 are touch keys, and the liquid crystal display 2 is a touch display. Further, the touch button and the touch display screen are integrated.
进一步的，所述工况监测单元包括温湿度传感器、无线温度传感器、可燃气体传感器、无线湿度传感器、漏电流检测单元和漏电流传感器。 Further, the working condition monitoring unit includes a temperature and humidity sensor, a wireless temperature sensor, a combustible gas sensor, a wireless humidity sensor, a leakage current detection unit and a leakage current sensor.
所述前面板的两侧还设有安装板6，该安装板6上开设有多个安装固定孔。 Both sides of the front panel are also provided with a mounting plate 6, and a plurality of mounting and fixing holes are opened on the mounting plate 6.
本发明中的电弧光保护装置具备电流和弧光传感器信号的采集、跳闸和信号输出能力，提供多种指示灯，便于操控人员更为直观地了解弧光保护装置的状态。本发明还提供触摸显示屏和触摸按键，支持大屏显示，并减小装置的体积，减小装置的占用空间。本发明还具有丰富的外接接口，支持更多的功能，可同时完成可见光与红外光的监测。 The arc protection device in the present invention is capable of collecting current and arc sensor signals, tripping and outputting signals, and provides a variety of indicator lights, so that operators can understand the state of the arc protection device more intuitively. The invention also provides a touch display screen and a touch button, which supports large-screen display, reduces the volume of the device, and reduces the occupied space of the device. The invention also has abundant external interfaces, supports more functions, and can simultaneously complete the monitoring of visible light and infrared light.
本发明所提出的一种电弧光保护方法，对双母线进行弧光保护，为了减小故障区域，第一低压母线和第二低压母线通过母联断路器来限制。电弧光保护装置和电流保护单元作为跳闸单元。电弧光保护装置在第一低压母线故障时，跳第一变压器的断路器，当第一低压母线和第二低压母线故障时，作断路失灵保护。如果超过电流定值，其区发生故障时，电弧光保护装置跳闸第一低压母线和第二低压母线的母联断路器。电流保护单元跳第二变压器的断路器，同时作为第二低压母线的断路失灵保护。 An arc light protection method proposed by the present invention performs arc light protection on double busbars. In order to reduce the fault area, the first low-voltage busbar and the second low-voltage busbar are limited by bus tie circuit breakers. The arc protection device and the current protection unit are used as the trip unit. The arc light protection device trips the circuit breaker of the first transformer when the first low-voltage bus fails, and performs circuit failure protection when the first and second low-voltage buses fail. If the current setting value is exceeded and a fault occurs in its zone, the arc light protection device trips the bus tie circuit breakers of the first low-voltage bus and the second low-voltage bus. The current protection unit trips the circuit breaker of the second transformer, and at the same time serves as the circuit breaker protection for the second low-voltage bus.
弧光告警从电弧光保护装置的告警继电器得到，当区域发生故障时激活，系统自检告警从电弧光保护装置告警继电器中得到。 The arc alarm is obtained from the alarm relay of the arc protection device, which is activated when a fault occurs in the area, and the system self-test alarm is obtained from the alarm relay of the arc protection device.
电弧光保护原理：依据弧光及电流增量两个因素，当同时检测到弧光和电流增量时发出跳闸命令。当系统发生故障时，弧光传感器将弧光信号转化为电信号，通过I/O辅助单元传给电弧光保护装置，电弧光保护装置再通过检测电流信号并且达到启动值，即发出跳闸信号。 The principle of arc light protection: According to the two factors of arc light and current increment, when the arc light and current increment are detected at the same time, a trip command is issued. When the system fails, the arc sensor converts the arc signal into an electrical signal, and transmits it to the arc protection device through the I/O auxiliary unit, and the arc protection device detects the current signal and reaches the starting value, that is, a trip signal is issued.
本发明采用分布式模式设计，适合作为中低压双母线保护，具备灵活的组网特性。其中馈线保护单元可独立形成最小化保护系统，单独保护馈线以减小事故停电范围。馈线单元也可运行于集中监控模式，通过电弧光保护装置调度通信。本发明电弧光保护采用检测弧光和电流为输入量，可单独作为过流保护，纯弧光保护，及弧光与过流双判据保护。本系统具有原理简单、动作可靠迅速、对一次设备无特殊要求、适应于各种运行方式的优点。 The invention adopts a distributed mode design, is suitable for medium and low voltage double bus protection, and has flexible networking characteristics. Among them, the feeder protection unit can independently form a minimum protection system, and protect the feeder alone to reduce the scope of accidental power outages. The feeder unit can also operate in a centralized monitoring mode, dispatching communication through the arc protection device. The arc light protection of the present invention adopts detection of arc light and current as input, and can be used as overcurrent protection, pure arc light protection, and double criterion protection of arc light and overcurrent. This system has the advantages of simple principle, reliable and rapid action, no special requirements for primary equipment, and adaptable to various operating modes.
如上参照附图以示例的方式描述了根据本发明的一种电弧光保护在线监测方法。但是，本领域技术人员应当理解，对于上述本发明所提出的一种电弧光保护在线监测方法，还可以在不脱离本发明内容的基础上做出各种改进。因此，本发明的保护范围应当由所附的权利要求书的内容确定。 An online monitoring method for arc protection according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the online monitoring method for arc protection proposed in the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the contents of the appended claims.
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