CN211180068U

CN211180068U - Photovoltaic conflux case arc light detection device

Info

Publication number: CN211180068U
Application number: CN201921976329.6U
Authority: CN
Inventors: 金凤; 韩亚龙; 张成龙; 孙新梅; 豆争; 张彪; 王雪雪; 钱嫚嫚
Original assignee: Anhui Longpo Electrical Co ltd
Current assignee: Anhui Longpo Electrical Co ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-08-04
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses a photovoltaic conflux case arc light detection device, which comprises a detection module, a central processing unit and an execution module, the utility model has scientific and reasonable structure and safe and convenient use, the detection module is arranged, an ultraviolet arc light probe is utilized to collect light signals, the photoelectric emission device converts the light signals into voltage signals through optical fiber transmission, the voltage signals are amplified and filtered by an amplifier and transmitted to a main controller, the main controller analyzes and processes the signals, sends corresponding instructions after judgment, can effectively detect the fault arc condition, drives an IGBT control module and breaks a circuit, thereby protecting the whole circuit, improving the reliability and the service life of the system work, effectively reducing the effect of an electromagnetic field, improving the detection efficiency and the accuracy, adopting an IGBT driving circuit, having high sensitivity and high breaking speed, the problem that the misoperation of the circuit breaker cannot be timely broken can be effectively solved.

Description

Photovoltaic conflux case arc light detection device

Technical Field

The utility model relates to a photovoltaic conflux case technical field specifically is a photovoltaic conflux case arc light detection device.

Background

Along with the large-scale extension of solar photovoltaic power stations, the scale of medium-low voltage distribution systems is also increased. However, the operation mode in the medium-low voltage distribution system is fast, the outgoing lines are more, the operation is also frequent, the misoperation is more easy to occur, the photovoltaic combiner box in the photovoltaic system plays a key role in starting and stopping, once a fault electric arc occurs, the combiner box, the battery assembly and the direct current cabinet are burnt out due to the high temperature of the electric arc, serious electric disasters are caused, huge economic losses are brought to enterprises, and the electric arc on the line can be divided into two types: one is the electric arc generated when a motor is started and stopped, an electric appliance is switched on or switched off or a socket is plugged in and out, the electric arc is instantaneous, the duration is limited, and the electric arc cannot cause damage to lines and equipment, and is called as 'good arc'; the other is that the arc occurs in the equipment line, the line is aged and insulated after long-term use, the arc is generated by the reasons of animal bite damage or loose link of conductor contact end, the arc of fire caused by the reasons causes serious damage to the equipment, and is estimated to be fault arc.

Disclosure of Invention

The utility model provides a photovoltaic conflux case arc light detection device can effectively solve and propose at present through circuit breaker, fuse and protection device such as lightning protection device installed in conflux case among the above-mentioned background art, only to overflowing or play the effect when short circuit in the circuit, open circuit, nevertheless in case the electric arc that breaks down, if can not in time detect and open circuit, the extremely problem of harm that causes.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a photovoltaic conflux case arc light detection device, includes detection module, central processing unit and execution module, detection module includes arc light detector and arc sound detector, arc light detector and arc sound detector are used for detecting respectively and gather arc light and arc sound signal data, arc light detector and arc sound detector output all are connected with photomultiplier input, photomultiplier is used for enlargeing the data and is connected with central processing unit input through photomultiplier's output, central processing unit is used for carrying out feature extraction and mode identification to data, central processing unit output is connected with the execution module input, execution module includes first IGBT control drive circuit, second IGBT control drive circuit and arc alarm module and IGBT module, first IGBT control drive circuit and second IGBT control drive circuit output all are connected with arc alarm module input, and the output end of the arc alarm module is connected with the input end of the IGBT module, and the IGBT module is controlled to be used for controlling the circuit breaker.

Preferably, the arc detector further comprises an ultraviolet arc probe and a photoelectric conversion device, wherein the ultraviolet arc probe is used for collecting optical signals, and the photoelectric conversion device is used for converting the optical signals into electric signals.

Preferably, the central processing unit includes two comparators, namely a comparator CMP1 and a comparator CMP2, the input ends of the comparator CMP1 and the comparator CMP2 are both connected with a reference signal, the output end of the comparator CMP1 is connected with the input end of the first IGBT control driving circuit, and the output end of the comparator CMP2 is connected with the input end of the second IGBT control driving circuit.

Preferably, the detection module further comprises a current detector, the current detector is used for detecting the current and the voltage of the bus, and the output end of the current detector is connected with the input end of the arc alarm module.

Preferably, the detection module further comprises a temperature sensor for detecting a temperature signal.

Preferably, the temperature measuring range of the temperature sensor is-55 to +125 ℃, the initial reference temperature of the temperature sensor is 100 ℃, and the output end of the temperature sensor is connected with the input end of the arc alarm module.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the advantages of being scientific and reasonable in structure, convenience safe in utilization, be provided with detection module, utilize ultraviolet arc light probe, gather light signal, by photoemissive device, through optical fiber transmission, photoelectric conversion device turns into voltage signal with light signal, to voltage signal, amplify the filtering through the amplifier, convey main control unit, main control unit carries out analysis processes to the signal, send corresponding instruction after the judgement, can the effectual detection trouble electric arc condition, drive IGBT control module, open circuit, thereby protect whole circuit, reliability and the life of improvement system work, and can effectively reduce the effect of electromagnetic field, improve detection efficiency and accuracy, and adopt IGBT drive circuit, the sensitivity is high, it is fast to divide the branch, can effectively solve the problem that circuit breaker malfunction can not in time divide the branch.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural diagram of an arc detection system according to the present invention;

FIG. 2 is a schematic structural diagram of a main program flowchart of the present invention;

FIG. 3 is a schematic diagram of the arc light collection schematic of the present invention;

FIG. 4 is a schematic structural diagram of a temperature control schematic diagram of the present invention;

fig. 5 is a schematic diagram of the interrupt routine schematic of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example (b): as shown in figure 1, the arc light detection device of the photovoltaic combiner box comprises a detection module, a central processing unit and an execution module, wherein the detection module comprises an arc light detector and an arc sound detector which are respectively used for detecting and collecting arc light and arc sound signal data, the output ends of the arc light detector and the arc sound detector are respectively connected with the input end of a photomultiplier, the photomultiplier is used for amplifying and multiplying the data and is connected with the input end of the central processing unit through the output end of the photomultiplier, the central processing unit is used for carrying out feature extraction and mode identification on the data, the output end of the central processing unit is connected with the input end of the execution module, the execution module comprises a first IGBT control driving circuit, a second IGBT control driving circuit, an arc alarm module and an IGBT module, the output ends of the first IGBT control driving circuit and the second IGBT control driving circuit are respectively connected with the input end of the arc alarm module, the output end of the arc alarm module is connected with the input end of the IGBT module, and the control IGBT module is used for controlling the circuit breaker.

Specifically, the arc light detector further comprises an ultraviolet arc light probe and a photoelectric conversion device, wherein the ultraviolet light probe is used for collecting light signals and transmitting the light signals to the photoelectric conversion device through optical fibers, and the photoelectric conversion device is used for converting the light signals into electric signals.

Specifically, the central processing unit comprises two comparators which are respectively a comparator CMP1 and a comparator CMP2, the input ends of the comparator CMP1 and the comparator CMP2 are connected with a reference signal, the output end of the comparator CMP1 is connected with the input end of a first IGBT control driving circuit, when the comparator CMP1 detects that the reference signal is a fault arc signal Q1, the fault arc signal is processed by the first IGBT control circuit, the central processing unit generates an interrupt processing program N1, the output end of the comparator CMP2 is connected with the input end of a second IGBT control driving circuit, when the reference signal is a good arc signal Q2, the central processing unit generates an interrupt processing program N2, each time the interrupt processing program N1 enters one interrupt processing program to drive the first IGBT control circuit, signals are transmitted to the arc alarm module, the arc alarm module gives an audible and visual alarm, and drives the IGBT module to control a circuit breaker and a quick circuit breaker, when an interrupt processing program N2 is entered, the second IGBT control circuit is driven to transmit signals to the arc alarm module when the judgment cycle detection is larger than the comparison value, the arc alarm module gives out sound and light alarm and drives the IGBT module to control the circuit breaker, so that the IGBT module acts to directly and quickly break the circuit, and the non-action caused by the failure of the circuit breaker is prevented.

As shown in fig. 2, the detection module starts to collect arc data, and performs data processing through the central processing unit to determine whether the arc is a fault arc, and the fault arc sends out an audible and visual alarm through the arc alarm module, and drives the IGBT module to control the circuit breaker, so as to quickly disconnect the circuit, and the good arc returns again to perform processing determination.

As shown in fig. 3, in the detection module, after the system is initialized, the arc is detected by the ultraviolet arc probe, and the presence or absence of arc is determined, when the arc is absent, the system continues to detect, when an arc light signal is detected, the arc light signal is converted into an electrical signal by the photoelectric conversion device, the electrical signal passes through the photomultiplier, the signal is amplified and filtered, and then compared with a set threshold, and if the arc light signal exceeds the threshold, the main control chip of the central processing unit sends an instruction to perform power-off protection.

As shown in fig. 4, the detection module further includes a temperature sensor for detecting a temperature signal, the temperature measurement range of the temperature sensor is-55 ° to +125 ℃, the initial reference temperature of the temperature sensor is 100 ℃, the output end of the temperature sensor is connected to the input end of the arc alarm module, after initialization, the temperature sensor detects the temperature signal in real time, transmits the signal to the central processing unit, compares the signal with the initial reference temperature, and drives the IGBT module to control the circuit breaker to quickly disconnect the circuit when the initial value is exceeded.

As shown in fig. 5, the detection module is used to collect arc signals, bus current and voltage, and temperature information, and store them through the central processing unit.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a photovoltaic collection flow box arc light detection device which characterized in that: the device comprises a detection module, a central processing unit and an execution module, wherein the detection module comprises an arc light detector and an arc sound detector, the arc light detector and the arc sound detector are respectively used for detecting and collecting arc light and arc sound signal data, the output ends of the arc light detector and the arc sound detector are respectively connected with the input end of a photomultiplier, the photomultiplier is used for amplifying and multiplying the data and is connected with the input end of the central processing unit through the output end of the photomultiplier, the central processing unit is used for carrying out feature extraction and mode identification on the data, the output end of the central processing unit is connected with the input end of the execution module, the execution module comprises a first IGBT control driving circuit, a second IGBT control driving circuit, an arc alarm module and an IGBT module, and the output ends of the first IGBT control driving circuit and the second IGBT control driving circuit are respectively connected with the input end of the arc alarm module, and the output end of the arc alarm module is connected with the input end of the IGBT module, and the IGBT module is controlled to be used for controlling the circuit breaker.

2. The photovoltaic combiner box arc light detection apparatus of claim 1, wherein: the arc detector also comprises an ultraviolet arc light probe and a photoelectric conversion device, wherein the ultraviolet arc light probe is used for collecting optical signals, and the photoelectric conversion device is used for converting the optical signals into electric signals.

3. The photovoltaic combiner box arc light detection apparatus of claim 1, wherein: the central processing unit comprises two comparators which are a comparator CMP1 and a comparator CMP2 respectively, input ends of the comparator CMP1 and the comparator CMP2 are connected with a reference signal, an output end of the comparator CMP1 is connected with an input end of the first IGBT control driving circuit, and an output end of the comparator CMP2 is connected with an input end of the second IGBT control driving circuit.

4. The photovoltaic combiner box arc light detection apparatus of claim 1, wherein: the detection module further comprises a current detector, the current detector is used for detecting the current and the voltage of the bus, and the output end of the current detector is connected with the input end of the arc alarm module.

5. The photovoltaic combiner box arc light detection apparatus of claim 1, wherein: the detection module further comprises a temperature sensor for detecting a temperature signal.

6. The photovoltaic combiner box arc light detecting device of claim 5, wherein: the temperature measuring range of the temperature sensor is-55 ℃ to +125 ℃, the initial reference temperature of the temperature sensor is 100 ℃, and the output end of the temperature sensor is connected with the input end of the arc alarm module.