CN205229368U

CN205229368U - Pollution flashover monitoring system

Info

Publication number: CN205229368U
Application number: CN201521050565.7U
Authority: CN
Inventors: 郝红彬
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-12-16
Filing date: 2015-12-16
Publication date: 2016-05-11
Anticipated expiration: 2025-12-16

Abstract

The utility model discloses a pollution flashover monitoring system, including leakage current sensor, temperature and humidity sensor and singlechip PIC16F87, the leakage current sensor is connected with the first signal conditioning module through first wave filter, the first signal conditioning module and AD conversion module are connected, temperature and humidity sensor passes through the second wave filter and is connected with the 2nd signal conditioning module, the 2nd signal conditioning module with AD conversion module connects, AD conversion module with singlechip PIC16F87 connects, singlechip PIC16F87 still respectively with man -machine interface circuit, GSM communication module, power module and clock circuit connection, the clock circuit is connected with channel selector, channel selector's input still is connected with singlechip PIC16F87. The utility model discloses can effectively prevent the emergence of pollution flashover.

Description

Pollution flashover monitoring system

Technical field

The utility model relates to a kind of equipment, particularly a kind of pollution flashover monitoring system.

Background technology

Pollution flashover refers to the electroceramics surface of power equipment, is subject to the conductive materials such as solid, liquid or gas and pollutes, when running into mist, dew and drizzle, pollution layer conductance increases, leakage current increases, and just produces shelf depreciation, may develop into arc flash in the shelf depreciation on working voltage lower ceramic part surface.Electric system generation pollution flashover accident, often causes serious consequence, causes many high-tension lines, multiple electric substations dead electricity, even cause system to shake, thus cause electric network from collapsing, cause large-area power-cuts, and release time is long.Power transmission and transforming equipment generation pollution flashover will have a strong impact on safe operation of power system, therefore, prevent power transmission and transforming equipment generation pollution flashover from having become the important process ensureing power system security production.

Utility model content

For the defect of prior art, the utility model provides a kind of pollution flashover monitoring system.

A kind of pollution flashover monitoring system, comprise leakage current sensor, Temperature Humidity Sensor and single-chip microcomputer PIC16F87, described leakage current sensor is connected with the first Signal-regulated kinase by the first wave filter, and described first Signal-regulated kinase is connected with A/D modular converter; Described Temperature Humidity Sensor is connected with secondary signal conditioning module by the second wave filter, and described secondary signal conditioning module is connected with described A/D modular converter; Described A/D modular converter is connected with described single-chip microcomputer PIC16F87, described single-chip microcomputer PIC16F87 is also connected with man-machine interface circuit, gsm communication module, power module and clock circuit respectively, described clock circuit is connected with channel to channel adapter, the input end of described channel to channel adapter is also connected with single-chip microcomputer PIC16F87, and the output terminal of described channel to channel adapter is connected with described A/D modular converter; The output terminal of described leakage current sensor is connected with the in-phase input end of the first amplifier LM224 with resistance R4 by R3, the two ends of described resistance R4 are connected to electric capacity C1 and electric capacity C2, electric capacity C1 and electric capacity C2 ground connection, the inverting input of described first amplifier LM224 is connected with its output terminal; The output terminal of described first amplifier LM224 is connected with the in-phase input end of the second amplifier LM224 with resistance R6 by resistance R5, the two ends of described resistance R6 are connected to electric capacity C3 and electric capacity C4, electric capacity C3 and electric capacity C4 ground connection, the inverting input of described second amplifier LM224 is connected with its output terminal, and the output terminal of described second amplifier LM224 is connected with described first Signal-regulated kinase.

Optionally, the output terminal of the first wave filter is connected with the in-phase input end of the 3rd amplifier LM224 by resistance R9, the in-phase input end of described 3rd amplifier LM224 is also by resistance R10 ground connection, the inverting input of described 3rd amplifier LM224 is connected with its output terminal by resistance R12, and the output terminal of described 3rd amplifier LM224 is connected with voltage stabilizing diode D1.

The beneficial effects of the utility model are: whole system does not need staff to nurse for a long time, both saves time, and changes from passive to active again, the generation of effective Prevent from Dirt Flash accident.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model pollution flashover monitoring system;

Fig. 2 is the structural representation of the first wave filter;

Fig. 3 is the structural representation of the first Signal-regulated kinase.

Embodiment

For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail embodiment of the present utility model below in conjunction with accompanying drawing, make above-mentioned and other object of the present utility model, Characteristics and advantages will be more clear.Reference numeral identical in whole accompanying drawing indicates identical part.Deliberately do not draw accompanying drawing in proportion, focus on purport of the present utility model is shown.

As shown in Figure 1, pollution flashover monitoring system of the present utility model comprises leakage current sensor, Temperature Humidity Sensor and single-chip microcomputer PIC16F87, described leakage current sensor is connected with the first Signal-regulated kinase by the first wave filter, and described first Signal-regulated kinase is connected with A/D modular converter; Described Temperature Humidity Sensor is connected with secondary signal conditioning module by the second wave filter, and described secondary signal conditioning module is connected with described A/D modular converter; Described A/D modular converter is connected with described single-chip microcomputer PIC16F87, described single-chip microcomputer PIC16F87 is also connected with man-machine interface circuit, gsm communication module, power module and clock circuit respectively, described clock circuit is connected with channel to channel adapter, the input end of described channel to channel adapter is also connected with single-chip microcomputer PIC16F87, and the output terminal of described channel to channel adapter is connected with described A/D modular converter.

Monitoring system for control core, gathers the leakage current of insulator with single-chip microcomputer PIC16F87 with leakage current sensor, leakage current signal, after modulate circuit process, is sent in AD converter, after completing analog to digital conversion, carried out data processing by single-chip microcomputer.By Temperature Humidity Sensor, gather the meteorologic parameters such as the temperature and humidity of insulator surrounding environment, gather with current signal after sending into single-chip microcomputer and carry out telecommunication.System adopts gsm module to realize radio communication, when the leakage current collected, temperature and humidity exceed default warning value, Single-chip Controlling wireless communication module sends alarming short message to staff, enable staff grasp the situation of insulator the very first time, effectively prevent the generation of pollution flashover accident.Channel to channel adapter is responsible in not gating first Signal-regulated kinase or secondary signal conditioning module in the same time, thus achieves the time-sharing multiplex of A/D converter, decreases the use amount of A/D device, reduces cost.

In converting station high voltage electrical apparatus insulation line monitoring device, current sensor plays key effect, the reliability and stability of its performance direct impact to voltage equipment dielectric loss measuring accuracy, for ensureing the sampling safety of high-tension apparatus and signal, mainly select punching structure, because high-tension apparatus is as sleeve pipe, mutual inductor, coupling condenser, the leakage current of the high-tension apparatuses such as lightning arrester is very little all in mA level, and working sensor is at the serious scene of electromagnetic interference (EMI), therefore traditional passive sensor cannot ensure degree of accuracy and the stability of phase tranformation error, be difficult to the requirement meeting insulation on-line measurement dielectric loss.Active Zero flux technology is adopted to be improve the preferred approach of small area analysis accuracy of detection.

In the present system, BCT-2 type Zero flux punching small electric current sensor is adopted to gather the leakage current of insulator.This sensor is specially high voltage electric equipment insulated on-line monitoring and a kind of small electric current sensor of developing, select initial permeability high, the little permalloy of loss does iron core, have employed unique profound and negative feedbck technology and unique shielding measure, automatically can compensate iron core, make iron core be operated in desirable Zero flux state.The safety (30 millimeters, aperture) of the equipment that more can ensure of punching structure, Long-Time Service shows, this sensor accurately can detect the power current of 100 μ A-700mA.Phase tranformation error is not more than 0.01 °, and without any need for correction and amendment, all devices is the same, and interchangeability is extremely strong.There is fabulous temperature characterisitic and interference of electromagnetic field ability, meet the degree of accuracy of the equipment sampling under complicated scene, power station interference completely.

Refer to Fig. 2, first wave filter and the second wave filter have identical structure, for the first wave filter, the output terminal of current sensor is connected with the in-phase input end of the first amplifier LM224 with resistance R4 by R3, the two ends of described resistance R4 are connected to electric capacity C1 and electric capacity C2, electric capacity C1 and electric capacity C2 ground connection, the inverting input of described first amplifier LM224 is connected with its output terminal; The output terminal of described first amplifier LM224 is connected with the in-phase input end of the second amplifier LM224 with resistance R6 by resistance R5, the two ends of described resistance R6 are connected to electric capacity C3 and electric capacity C4, electric capacity C3 and electric capacity C4 ground connection, the inverting input of described second amplifier LM224 is connected with its output terminal, and the output terminal of described second amplifier LM224 is connected with described first Signal-regulated kinase.In electric system, due to the effect of nonlinear-load, the waveform generation of voltage and current is distorted, a large amount of higher hamonic waves has been there is in electrical network, particularly the existence of three times and quintuple harmonics, brings high risks to digital measurement acquisition system, also makes surveyed parameter value degree of accuracy not high.In order to avoid these harmonic influence, filtering circuit must be had by each harmonic filtering.This novel use is with the low-pass filter circuit of operational amplifier, owing to have employed integrated operational amplifier, make system have high input impedance, low output impedance and feedback to a certain degree, avoid the shortcoming that the output signal amplitude that causes because of load dividing potential drop diminishes.

As shown in Figure 3, because AD converter can only change positive voltage, and the AC signal exported by wave filter existing on the occasion of, also have negative value, so the negative voltage of output should be risen to more than 0V.First Signal-regulated kinase and secondary signal conditioning module have identical structure, for the first Signal-regulated kinase, the output terminal of the first wave filter is connected with the in-phase input end of the 3rd amplifier LM224 by resistance R9, the in-phase input end of described 3rd amplifier LM224 is also by resistance R10 ground connection, the inverting input of described 3rd amplifier LM224 is connected with its output terminal by resistance R12, and the output terminal of described 3rd amplifier LM224 is connected with voltage stabilizing diode D1.LM285D1.2 is 1.235V precision voltage source, technical grade device, and its working current is very wide, and from 10 μ A to 20mA, precision is 1%, which ensures the stable of sine wave output intermediate value.For avoiding output over-voltage to damage single-chip microcomputer, add 3V stabilivolt at output terminal.

Native system selects PIC16F87 single-chip microcomputer as core controller.Current PIC16F87 is low-power consumption 8 the CMOS microcontrollers based on the AVRRISC structure strengthened, and be the one that in 8 machines, performance is the highest, for the application of leakage protection system, this single-chip microcomputer is than better suited.

Set forth a lot of detail in the above description so that fully understand the utility model.But above description is only preferred embodiment of the present utility model, the utility model can be much different from alternate manner described here to implement, and therefore the utility model is not by the disclosed concrete restriction implemented above.Any those skilled in the art are not departing under technical solutions of the utility model ambit simultaneously, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solutions of the utility model, or be revised as the Equivalent embodiments of equivalent variations.Every content not departing from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solutions of the utility model protection.

Claims

1. a pollution flashover monitoring system, it is characterized in that, comprise leakage current sensor, Temperature Humidity Sensor and single-chip microcomputer PIC16F87, described leakage current sensor is connected with the first Signal-regulated kinase by the first wave filter, and described first Signal-regulated kinase is connected with A/D modular converter; Described Temperature Humidity Sensor is connected with secondary signal conditioning module by the second wave filter, and described secondary signal conditioning module is connected with described A/D modular converter; Described A/D modular converter is connected with described single-chip microcomputer PIC16F87, described single-chip microcomputer PIC16F87 is also connected with man-machine interface circuit, gsm communication module, power module and clock circuit respectively, described clock circuit is connected with channel to channel adapter, the input end of described channel to channel adapter is also connected with single-chip microcomputer PIC16F87, and the output terminal of described channel to channel adapter is connected with described A/D modular converter; The output terminal of described leakage current sensor is connected with the in-phase input end of the first amplifier LM224 with resistance R4 by R3, the two ends of described resistance R4 are connected to electric capacity C1 and electric capacity C2, electric capacity C1 and electric capacity C2 ground connection, the inverting input of described first amplifier LM224 is connected with its output terminal; The output terminal of described first amplifier LM224 is connected with the in-phase input end of the second amplifier LM224 with resistance R6 by resistance R5, the two ends of described resistance R6 are connected to electric capacity C3 and electric capacity C4, electric capacity C3 and electric capacity C4 ground connection, the inverting input of described second amplifier LM224 is connected with its output terminal, and the output terminal of described second amplifier LM224 is connected with described first Signal-regulated kinase.

2. pollution flashover monitoring system according to claim 1, it is characterized in that, the output terminal of the first wave filter is connected with the in-phase input end of the 3rd amplifier LM224 by resistance R9, the in-phase input end of described 3rd amplifier LM224 is also by resistance R10 ground connection, the inverting input of described 3rd amplifier LM224 is connected with its output terminal by resistance R12, and the output terminal of described 3rd amplifier LM224 is connected with voltage stabilizing diode D1.