CN203589690U - An electric arc protective device - Google Patents
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Abstract
本实用新型提供一种电弧保护装置，包括：多相电压采样模块，用于采集电路中的电压信号；多相电流采样模块，用于采集电路中的电流信号；微处理模块，用于接收多相电压采样模块和多相电流采样模块发送的电压信号和电流信号，并检验电路中是否存在故障电弧，并根据检验结果控制报警与保护模块；报警与保护模块，与微处理模块连接，用于当微处理模块判断电路中存在故障电弧时进行报警并保护；控制模块，与微处理模块连接，用于设置电压阈值和电流阈值。本实用新型通过提供一种电弧保护装置，当判定电路中存在电弧故障时，触发报警与动作保护进行报警，进而断开电路对电路进行保护，使用户防患于未然，减少了损失。
The utility model provides an arc protection device, comprising: a multi-phase voltage sampling module for collecting voltage signals in a circuit; a multi-phase current sampling module for collecting current signals in a circuit; a micro-processing module for receiving multiple The phase voltage sampling module and the multi-phase current sampling module send the voltage signal and current signal, and check whether there is a fault arc in the circuit, and control the alarm and protection module according to the inspection result; the alarm and protection module is connected with the micro-processing module for When the microprocessing module judges that there is a fault arc in the circuit, it will alarm and protect; the control module is connected with the microprocessing module and is used to set the voltage threshold and the current threshold. The utility model provides an arc protection device. When it is judged that there is an arc fault in the circuit, the alarm and action protection are triggered to alarm, and then the circuit is disconnected to protect the circuit, so that users can prevent problems before they happen and reduce losses.
Description
技术领域technical field
本实用新型涉及电路保护设备领域，特别涉及一种电弧保护装置。The utility model relates to the field of circuit protection equipment, in particular to an arc protection device.
背景技术Background technique
在日常生活、工业中，各类电器设备的使用过程中可能引起火灾，火灾的发生将带来大量的人财损失。电器火灾的发生主要有个原因：由电流因素引起的电器火灾和由故障电弧引起的电器火灾。In daily life and industry, fires may occur during the use of various electrical equipment, and the occurrence of fires will bring a lot of human and property losses. There are mainly two reasons for the occurrence of electrical fires: electrical fires caused by current factors and electrical fires caused by fault arcs.
由电流因素引起的电器火灾主要是有短路和过载，这种因素通常会由于产生的大电流而触动断路器或空气开关瞬时动作切断电源，避免火灾。而故障电弧引起的火灾主要由于电线外皮氧化、老化、电线虚接、松动等引起。电弧因素由于故障电弧并没有电线搭接，而是持续带来高温很容易引燃附近可燃物质，但接地故障引起的电流较小，不足以使断路器动作跳闸切断电源，火灾因素难以预知。Electrical fires caused by current factors are mainly short-circuit and overload. This factor usually triggers the circuit breaker or air switch due to the large current generated to cut off the power supply instantaneously to avoid fire. The fire caused by the fault arc is mainly caused by the oxidation, aging, virtual connection and loosening of the wire sheath. The arc factor is due to the fact that the arc fault does not have a wire overlap, but continues to bring high temperature, which can easily ignite nearby combustible substances, but the current caused by the ground fault is too small to cause the circuit breaker to trip and cut off the power supply. The fire factor is difficult to predict.
实用新型内容Utility model content
（一）解决的技术问题(1) Solved technical problems
本实用新型解决的技术问题是提供一种电弧保护装置，用于及时判定电弧故障，采取报警与动作保护。The technical problem solved by the utility model is to provide an arc protection device, which is used for timely judging arc faults and adopting alarm and action protection.
（二）技术方案(2) Technical solution
本实用新型提供一种电弧保护装置，所述装置包括：多相电压采样模块、多相电流采样模块、微处理模块、报警与保护模块和控制模块；The utility model provides an arc protection device, which comprises: a multi-phase voltage sampling module, a multi-phase current sampling module, a micro-processing module, an alarm and protection module and a control module;
多相电压采样模块，用于采集电路中的电压信号；The multi-phase voltage sampling module is used to collect the voltage signal in the circuit;
多相电流采样模块，用于采集电路中的电流信号；The multi-phase current sampling module is used to collect current signals in the circuit;
微处理模块，与多相电压采样模块和多相电流采样模块连接，用于接收多相电压采样模块和多相电流采样模块发送的电压信号和电流信号，并检验电路中是否存在故障电弧，并根据检验结果控制报警与保护模块；The micro-processing module is connected with the multi-phase voltage sampling module and the multi-phase current sampling module, and is used for receiving the voltage signal and the current signal sent by the multi-phase voltage sampling module and the multi-phase current sampling module, and checking whether there is a fault arc in the circuit, and Control the alarm and protection module according to the test results;
报警与保护模块，与微处理模块连接，用于当微处理模块判断电路中存在故障电弧时进行报警并保护；The alarm and protection module is connected with the micro-processing module, and is used for alarming and protecting when the micro-processing module judges that there is a fault arc in the circuit;
控制模块，与微处理模块连接，用于设置电压阈值和电流阈值。The control module is connected with the microprocessor module and is used for setting the voltage threshold and the current threshold.
优选地，微处理模块包括跟随电路和AD转换器，跟随电路分别与多相电压采样模块和多相电流采样模块相连，AD转换器与跟随电路相连；Preferably, the micro-processing module includes a follower circuit and an AD converter, the follower circuit is connected to the multi-phase voltage sampling module and the multi-phase current sampling module respectively, and the AD converter is connected to the follower circuit;
跟随电路，用于对多相电压采样模块采集电路中的电压信号进行放大，还用于对多相电流采样模块采集电路中的电流信号进行放大，进而将放大后的电压信号和放大后的电流信号进行滤波；The follower circuit is used to amplify the voltage signal in the acquisition circuit of the multi-phase voltage sampling module, and is also used to amplify the current signal in the acquisition circuit of the multi-phase current sampling module, and then the amplified voltage signal and the amplified current The signal is filtered;
AD转换器，用于将跟随电路处理后模拟信号转换为数字信号。The AD converter is used to convert the analog signal processed by the following circuit into a digital signal.
优选地，微处理模块还包括数据处理分析模块，数据处理分析模块与AD转换器相连，用于当电压信号和电流信号经过跟随电路和AD转换器处理后，分别对处理后的电压信号和处理后的电流信号进行计算。Preferably, the micro-processing module also includes a data processing and analysis module, and the data processing and analysis module is connected to the AD converter, and is used to process the voltage signal and the processed voltage signal and the current signal after being processed by the follower circuit and the AD converter, respectively. The subsequent current signal is calculated.
优选地，数据处理分析模块还用于将电压相信号与电压阈值、电流相信号与电流阈值进行比较；Preferably, the data processing and analysis module is also used to compare the voltage phase signal with the voltage threshold, and the current phase signal with the current threshold;
当电流相信号大于电流阈值且电压相信号小于电压阈值时，则电路中存在故障电弧；When the current phase signal is greater than the current threshold and the voltage phase signal is less than the voltage threshold, there is a fault arc in the circuit;
所述电压相信号为电压信号经过数据处理分析模块处理后得到的信号，所述电流相信号为电流信号经过数据处理分析模块处理后的信号。The voltage phase signal is a signal obtained after the voltage signal is processed by the data processing and analysis module, and the current phase signal is a signal obtained after the current signal is processed by the data processing and analysis module.
优选地，报警与保护模块与数据处理分析模块相连，当电路中存在故障电弧时，数据处理分析模块触发报警与保护模块进行报警，报警与保护模块断开电路。Preferably, the alarm and protection module is connected to the data processing and analysis module. When there is a fault arc in the circuit, the data processing and analysis module triggers the alarm and protection module to issue an alarm, and the alarm and protection module disconnects the circuit.
（三）有益效果(3) Beneficial effects
本实用新型通过提供一种电弧保护装置，当判定电路中存在电弧故障时，触发报警与动作保护进行报警，进而断开电路对电路进行保护，使用户防患于未然，减少了损失。The utility model provides an arc protection device. When it is judged that there is an arc fault in the circuit, the alarm and action protection are triggered to alarm, and then the circuit is disconnected to protect the circuit, so that users can prevent problems before they happen and reduce losses.
附图说明Description of drawings
图1为本实用新型的装置结构图。Fig. 1 is a device structure diagram of the present utility model.
具体实施方式Detailed ways
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.
本实用新型提供一种电弧保护装置，如图1所示，所述装置包括：多相电压采样模块、多相电流采样模块、微处理模块、报警与保护模块和控制模块；The utility model provides an arc protection device, as shown in Figure 1, the device includes: a multi-phase voltage sampling module, a multi-phase current sampling module, a micro-processing module, an alarm and protection module and a control module;
多相电压采样模块，用于采集电路中的电压信号；The multi-phase voltage sampling module is used to collect the voltage signal in the circuit;
多相电流采样模块，用于采集电路中的电流信号；The multi-phase current sampling module is used to collect current signals in the circuit;
微处理模块，与多相电压采样模块和多相电流采样模块连接，用于接收多相电压采样模块和多相电流采样模块发送的电压信号和电流信号，并检验电路中是否存在故障电弧，并根据检验结果控制报警与保护模块；The micro-processing module is connected with the multi-phase voltage sampling module and the multi-phase current sampling module, and is used for receiving the voltage signal and the current signal sent by the multi-phase voltage sampling module and the multi-phase current sampling module, and checking whether there is a fault arc in the circuit, and Control the alarm and protection module according to the test results;
微处理模块包括跟随电路和AD转换器，跟随电路分别与多相电压采样模块和多相电流采样模块相连，AD转换器与跟随电路相连；The micro-processing module includes a follower circuit and an AD converter, the follower circuit is connected to the multi-phase voltage sampling module and the multi-phase current sampling module respectively, and the AD converter is connected to the follower circuit;
跟随电路，用于对多相电压采样模块采集电路中的电压信号进行放大，还用于对多相电流采样模块采集电路中的电流信号进行放大，进而将放大后的电压信号和放大后的电流信号进行滤波；The follower circuit is used to amplify the voltage signal in the acquisition circuit of the multi-phase voltage sampling module, and is also used to amplify the current signal in the acquisition circuit of the multi-phase current sampling module, and then the amplified voltage signal and the amplified current The signal is filtered;
AD转换器，用于将跟随电路处理后模拟信号转换为数字信号。The AD converter is used to convert the analog signal processed by the following circuit into a digital signal.
微处理模块还包括数据处理分析模块，数据处理分析模块与AD转换器相连，用于当电压信号和电流信号经过跟随电路和AD转换器处理后，分别对处理后的电压信号和处理后的电流信号进行计算。The micro-processing module also includes a data processing and analysis module. The data processing and analysis module is connected with the AD converter, and is used to respectively analyze the processed voltage signal and the processed current after the voltage signal and the current signal are processed by the follower circuit and the AD converter. signal to calculate.
对处理后的电压信号和处理后的电流信号进行计算是根据下列公式进行计算：The calculation of the processed voltage signal and the processed current signal is performed according to the following formula:
Dv=|Vn-1+Vn+1-2Vn| （1）D v = |V n-1 +V n+1 -2V n | (1)
Di=|In-1+In+1-2In| （2）D i =|I n-1 +I n+1 -2I n | ( 2 )
其中，Dv和Di分别为电压相信号和电流相信号，Vn-1及In-1分别为多相电压采样模块和多相电流采样模块在第一周期内测量的电压数值与电流数值，Vn及In-1分别为多相电压采样模块和多相电流采样模块在第二周期内测量的电压数值与电流数值；Vn+1及In+1分别为多相电压采样模块和多相电流采样模块在第三周期内测量的电压数值与电流数值。Among them, D v and D i are the voltage phase signal and current phase signal respectively, V n-1 and I n-1 are the voltage value and current measured by the multi-phase voltage sampling module and the multi-phase current sampling module in the first cycle respectively V n and I n-1 are the voltage value and current value measured by the multi-phase voltage sampling module and the multi-phase current sampling module in the second cycle respectively; V n+1 and I n+1 are the multi-phase voltage sampling The voltage value and current value measured by the module and the multi-phase current sampling module in the third cycle.
控制模块，与微处理模块连接，用于设置电压阈值和电流阈值。The control module is connected with the microprocessor module and is used for setting the voltage threshold and the current threshold.
数据处理分析模块还用于将电压相信号与电压阈值、电流相信号与电流阈值进行比较；The data processing analysis module is also used to compare the voltage phase signal with the voltage threshold, and the current phase signal with the current threshold;
当电流相信号大于电流阈值且电压相信号小于电压阈值时，则电路中存在故障电弧；When the current phase signal is greater than the current threshold and the voltage phase signal is less than the voltage threshold, there is a fault arc in the circuit;
当电压相信号大于电压阈值时，则电流相信号可能为大于电流阈值，当电压相信号大于电压阈值且电流相信号大于电流阈值时，则电路中为正常电弧；该情况为在电路中突然接入一个大功率的电器。When the voltage phase signal is greater than the voltage threshold, the current phase signal may be greater than the current threshold. When the voltage phase signal is greater than the voltage threshold and the current phase signal is greater than the current threshold, the circuit is a normal arc; into a high-power appliance.
所述电压相信号为电压信号经过数据处理分析模块处理后得到的信号，所述电流相信号为电流信号经过数据处理分析模块处理后的信号。The voltage phase signal is a signal obtained after the voltage signal is processed by the data processing and analysis module, and the current phase signal is a signal obtained after the current signal is processed by the data processing and analysis module.
报警与保护模块，与微处理模块连接，用于当微处理模块判断电路中存在故障电弧时进行报警并保护；The alarm and protection module is connected with the micro-processing module, and is used for alarming and protecting when the micro-processing module judges that there is a fault arc in the circuit;
报警与保护模块与数据处理分析模块相连，当电路中存在故障电弧时，数据处理分析模块触发报警与保护模块进行报警，报警与保护模块断开电路。The alarm and protection module is connected with the data processing and analysis module. When there is a fault arc in the circuit, the data processing and analysis module triggers the alarm and protection module to give an alarm, and the alarm and protection module disconnects the circuit.
以上实施方式仅用于说明本实用新型，而并非对本实用新型的限制，有关技术领域的普通技术人员，在不脱离本实用新型的精神和范围的情况下，还可以做出各种变化和变型，因此所有等同的技术方案也属于本实用新型的范畴，本实用新型的专利保护范围应由权利要求限定。The above embodiments are only used to illustrate the utility model, but not to limit the utility model. Those of ordinary skill in the relevant technical fields can also make various changes and modifications without departing from the spirit and scope of the utility model. , so all equivalent technical solutions also belong to the category of the utility model, and the patent protection scope of the utility model should be defined by the claims.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242264A (en) * | 2014-08-29 | 2014-12-24 | 天津市鸿远电气股份有限公司 | Arc fault protection device for three-phase circuit |
| CN111913084A (en) * | 2020-08-14 | 2020-11-10 | 浙江恒捷智能科技有限公司 | Intelligent fault arc detector |
| CN114814484A (en) * | 2022-03-30 | 2022-07-29 | 常州市工业互联网研究院有限公司 | Fault arc detection method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242264A (en) * | 2014-08-29 | 2014-12-24 | 天津市鸿远电气股份有限公司 | Arc fault protection device for three-phase circuit |
| CN111913084A (en) * | 2020-08-14 | 2020-11-10 | 浙江恒捷智能科技有限公司 | Intelligent fault arc detector |
| CN111913084B (en) * | 2020-08-14 | 2023-04-11 | 浙江恒捷智能科技有限公司 | Intelligent fault arc detector |
| CN114814484A (en) * | 2022-03-30 | 2022-07-29 | 常州市工业互联网研究院有限公司 | Fault arc detection method |
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