CN206209058U - Overhead transmission line lightning arrester insulation monitoring device - Google Patents

Abstract

The utility model discloses an insulation monitoring device for lightning arresters for overhead lines, which comprises a primary side power supply module, an impact current detection module, a signal processing module isolation communication module, a secondary side power supply module, a controller circuit module, a position indication module, and a wireless communication module. Module and master station monitoring system; primary side and secondary side power module supply power; impulse current detection module is installed in the grounding loop of the arrester, detects the grounding loop impulse current, and sends it to the controller circuit module through the signal processing module and isolation communication module; The controller circuit module sends the received impulse current information and the geographical position indication information sent by the position indication module to the main station monitoring system through the wireless communication module. The utility model realizes real-time, automatic and unmanned monitoring of the insulation characteristics of the lightning arrester for overhead lines, and has a large impact current detection range, safe and reliable device, and wide application.

Description

Overhead transmission line lightning arrester insulation monitoring device

Technical field

The utility model belongs to electric automatization field, and in particular to a kind of overhead transmission line is monitored with lightning arrester insulation and filled Put.

Background technology

With the development and the improvement of people's living standards of national economy technology, electric energy has become people's production and life Indispensable secondary energy sources in work.And with automation and the development of unmanned technology, the automatic unmanned monitoring of power system Have become one of direction of power system development.

At present, overhead transmission line Zinc-Oxide Arrester is divided into two classes, and a class is zero-clearance zinc oxide lightning arrester, another kind of to be Band gap Zinc-Oxide Arrester.Zero-clearance zinc oxide lightning arrester bears the effect of working voltage for a long time, has leakage current and flows through Zinc-Oxide Arrester, zinc oxide valve plate is substantially a kind of piezo-resistance, and when there is leakage current to flow through, zinc oxide valve plate will Heating, due to the nonlinear characteristic of zinc oxide valve plate, long duration of action will make zinc oxide valve plate aging, or even thermal breakdown occur； Due to long-play out of doors, therefore steam in environment can enter arrester inside and receives valve block Zinc-Oxide Arrester Tide, and then the leakage current increase of arrester is flowed through, long duration of action can make the decreasing insulating of valve block.And band gap oxygen Although change zinc arrester being acted on without operating voltage, high current lightning impulse make resistor valve sheet aging and the problems such as make moist still In the presence of.When Zinc-Oxide Arrester is caused insulating properties to reduce by above-mentioned cause influence, power equipment in parallel will lose therewith Deprotection, influences electric device safe operation.Need reliable detection means.

At present, the insulating monitoring for overhead transmission line arrester is scarcely out of swaddling-clothes, i.e., the artificial inspection trips stage： Power system periodically sends electrical power line inspector that overhead transmission line is checked with the insulation facility of arrester.In addition, can only wait When it occurs specific failure, could find that the insulation of overhead transmission line arrester goes wrong.Obviously, it is current for built on stilts The insulating monitoring of Line ZnO Surge Arrester is not only wasted time and energy, and cost is high, but also far do not reach automation and it is unmanned Level.

Utility model content

The purpose of this utility model is that offer is a kind of can carry out real time implementation, nothing to overhead transmission line with the insulation of arrester Peopleization and automatically-monitored overhead transmission line lightning arrester insulation monitoring device.

This overhead transmission line lightning arrester insulation monitoring device that the utility model is provided, including electrical primary part, electricity The second part of gas two and master supervisory system；The electrical primary part include primary side power module, dash current detection module, Signal processing module and isolation communication module；The electric secondary part include secondary side power module, controller circuitry module, Position instruction module and wireless communication module；Primary side power module is powered to electrical primary part；Dash current detection module In the earth-return circuit of overhead transmission line arrester, for the impact in the earth-return circuit for detecting overhead transmission line arrester Electric current, and the information transfer that will be detected processed to signal processing module, then again by isolate communication module send to Electric secondary part；Secondary side power module is powered to electric secondary part；Controller circuitry module connects communication module is isolated The geographical position configured information that the dash current information and position instruction module that receive send by wireless communication module send to Master supervisory system, so as to realize the automation and unmanned monitoring of overhead transmission line lightning arrester insulation.

Described primary side power module is current transformer electricity-fetching module.

Described dash current detection module includes Rogowski coil and integrating circuit；The Rogowski coil is used to detect built on stilts Dash current in the earth-return circuit of Line ZnO Surge Arrester；The signal that described integrating circuit is used to detect Rogowski coil turns It is changed to voltage signal.

Described isolation communication module includes electric-light conversion circuit, telecommunication optical fiber and optical-electronic change-over circuit；The electrical-optical Change-over circuit is arranged on electrical primary part, is transmitted for converting electrical signals to optical signal；The optical-electronic change-over circuit Electric secondary part is arranged on, the optical signal reduction for that will receive turns into electric signal；Described electrical primary part and electrically Row data communication is entered by telecommunication optical fiber between two second part.

Described secondary side power module is solar energy electricity-fetching module or current transformer electricity-fetching module.

Described controller circuitry module includes the controller circuitry being made up of model STM32f103c8t6 and by model For the watchdog circuit that the watchdog chip of SP706S is constituted.

Described position instruction module is d GPS locating module.

Described d GPS locating module is made up of the GPS module of model NEO-6M.

Described wireless communication module is GPRS wireless communication modules.

This overhead transmission line lightning arrester insulation monitoring device that the utility model is provided, detects built on stilts by Rogowski coil The dash current of Line ZnO Surge Arrester earth-return circuit, and the signal that will be detected by a series of signal processing circuit carry out every From and treatment, then sent to master supervisory system in the way of radio communication again, it is achieved thereby that to overhead transmission line with lightning-arrest Real-time, the automatic and no worker monitor of the insulation characterisitic of device；Additionally, this overhead transmission line that the utility model is provided is exhausted with arrester Edge monitoring device, dash current detection is carried out using Rogowski coil, and measurement range is big, and uses isolation communication to carry out data and lead to Letter so that device is more safe and reliable, and widely applicable.

Brief description of the drawings

Fig. 1 is functional block diagram of the present utility model.

Fig. 2 is the circuit diagram of the integrating circuit of Rogowski coil of the present utility model.

Fig. 3 is the circuit diagram of the watchdog circuit of controller circuitry module of the present utility model.

Fig. 4 is the circuit theory diagrams of d GPS locating module of the present utility model.

Specific embodiment

It is as shown in Figure 1 functional block diagram of the present utility model：This overhead transmission line that the utility model is provided is used lightning-arrest Device insulation monitoring and warning device, including electrical primary part, electric secondary part and master supervisory system；The electrical primary part bag Include primary side power module, dash current detection module, signal processing module and isolation communication module；The electric secondary part Including secondary side power module, controller circuitry module, position instruction module and wireless communication module；Primary side power module is adopted Current Transformer electricity-fetching module, for being powered to electrical primary part；Dash current detection module includes Rogowski coil and product Parallel circuit：Rogowski coil is arranged in the earth-return circuit of overhead transmission line arrester, for detecting overhead transmission line arrester Dash current in earth-return circuit；The signal that integrating circuit is used to detect Rogowski coil is converted to voltage signal and is transferred to Signal processing module is processed, and is then sent to electric secondary part by isolating communication module again；Secondary side power module Current transformer electricity-fetching module can equally be used, it would however also be possible to employ photovoltaic generating module, it is used to be supplied to electric secondary part Electricity；Controller circuitry module includes the controller circuitry being made up of model STM32f103c8t6 and by model SP706S's The watchdog circuit that watchdog chip is constituted, controller circuitry module will isolate the dash current information that receives of communication module and The geographical position configured information that position instruction module sends is sent to master supervisory system by wireless communication module, so as to realize The automation of overhead transmission line lightning arrester insulation and unmanned monitoring.

Isolation communication module includes electric-light conversion circuit, telecommunication optical fiber and optical-electronic change-over circuit；The electrical-optical conversion electricity Road is arranged on electrical primary part, is transmitted for converting electrical signals to optical signal；The optical-electronic change-over circuit is arranged on Electric secondary part, the optical signal reduction for that will receive turns into electric signal；Described electrical primary part and electric secondary portion / row data communication is entered by telecommunication optical fiber.

Position instruction module uses the GPS module of model NEO-6M.Wireless communication module is GPRS wireless communication modules.

It is illustrated in figure 2 the circuit diagram of the integrating circuit of Rogowski coil of the present utility model：Because Rogowski coil is The loop coil of one uniform winding on nonferromugnetic material, output signal is the differential of Current versus time.Therefore, by one The individual circuit being integrated to the voltage signal for exporting, it is possible to truly reduce input current.The coil has electric current real-time Measurement, fast response time, will not saturation, the characteristics of almost there is no phase error, therefore it can be applied to relay protection, controllable silicon The field of the high current such as the signal such as rectification, frequency control, electric resistance welding Severe distortion and electric furnace, short-circuit test, thunder and lightning signal acquisition Close.

Operational amplifier, integrating resistor electric capacity of the integrating circuit by model AD8541（R1 and C1）, filter circuit（R2 and C2）And gain adjusting circuit（R3 and R4）Composition；Operational amplifier U1 and resistance R1, electric capacity C1 constitute integrating circuit, R2 and C2 is used to filter useless high-frequency signal, and resistance R3 and R4 are then used to control the gain of integrating network.

It is illustrated in figure 3 the circuit diagram of the watchdog circuit of controller circuitry module of the present utility model：House dog Circuit is constituted using the watchdog chip of model SP706S：1 pin of chip connects positive source by pull-up resistor R105, So as to ensure that 1 pin is high level；2 pin of chip are power pins, are connected with positive source, and be grounded by filter capacitor C42； 3 pin of chip are grounding pin, are directly grounded；4 pin and 5 pin of chip are hanging；6 pin of chip are feeding-dog signal, again by Pull-up resistor is connected with positive source；7 pin of chip are RESET signal output pin, directly export RESET signal；The 8 of chip Pin is connected by resistance R106 with the pin of power supply 1.

It is illustrated in figure 4 the circuit theory diagrams of d GPS locating module of the present utility model：D GPS locating module is by model The GPS module of NEO-6M is constituted；1 pin of module is directly grounded；20 pin and 21 pin of module are rs 232 serial interface signal pin, are passed through respectively Current-limiting resistance FB1 and FB2 connection GPS rs 232 serial interface signal GPS TXD and GPSRXD；The pin of module 22 connects battery；23 pin of module are Power pins, it passes through filter circuit（Including filter capacitor C54 ~ C56 and C59 ~ C61, filter inductance L6 and resistance R115）Even Connect one end of the movable end of switching tube Q3；Other end connection+3.3V the power pins of the movable end of switching tube Q3；The control of switching tube End processed connects positive source by pull-up resistor R109, is strolled resistance R110 connections GPS switching signals GPS simultaneously also by the spare time SWITCH；The 24 pin ground connection of module；3 pin Connection Time signals of module, simultaneously also by indicating circuit（R114 and D45）Connect Ground, so as to show the working condition of GPS module；7 pin of module are grounded by pull down resistor R112；2 pin of module are directly connected to Signal IN.

Claims (9)

1. A surge arrester insulation monitoring device for overhead lines is characterized in that it comprises an electrical primary part, an electrical secondary part and a master station monitoring system; the electrical primary part comprises a primary side power supply module, an inrush current detection module, a signal processing module and Isolated communication module; the electrical secondary part includes a secondary side power supply module, a controller circuit module, a position indication module and a wireless communication module; the primary side power supply module supplies power to the electrical primary part; the inrush current detection module is installed in the lightning arrester for overhead lines In the grounding loop of the overhead line, it is used to detect the impact current in the grounding loop of the arrester for overhead lines, and transmit the detected information to the signal processing module for processing, and then send it to the electrical secondary part through the isolation communication module; the secondary side The power supply module supplies power to the electrical secondary part; the controller circuit module sends the inrush current information received by the isolation communication module and the geographical position indication information sent by the position indication module to the main station monitoring system through the wireless communication module, so as to realize the lightning arrester for overhead lines Automated and unmanned monitoring of insulation. 2. The insulation monitoring device for lightning arresters for overhead lines according to claim 1, characterized in that said primary-side power supply module is a current transformer power-taking module. 3. The lightning arrester insulation monitoring device for overhead lines according to claim 1, characterized in that said surge current detection module comprises a Rogowski coil and an integrating circuit; Inrush current; the integrating circuit is used to convert the signal detected by the Rogowski coil into a voltage signal. 4. The lightning arrester insulation monitoring device for overhead lines according to one of claims 1 to 3, characterized in that the isolated communication module includes an electrical-optical conversion circuit, a communication optical fiber, and an optical-electrical conversion circuit; the electrical-optical The conversion circuit is set in the electrical primary part for converting the electrical signal into an optical signal for transmission; the optical-electrical conversion circuit is set in the electrical secondary part for restoring the received optical signal into an electrical signal; the electrical Data communication is carried out between the primary part and the electrical secondary part through the communication optical fiber. 5. The insulation monitoring device for lightning arresters for overhead lines according to claim 4, characterized in that said secondary side power supply module is a solar power taking module or a current transformer power taking module. 6. The lightning arrester insulation monitoring device for overhead lines according to claim 4, wherein said controller circuit module includes a controller circuit made of STM32f103c8t6 and a watchdog chip made of SP706S by a model. watchdog circuit. 7. The insulation monitoring device for lightning arresters for overhead lines according to claim 4, characterized in that said position indicating module is a GPS positioning module. 8. The lightning arrester insulation monitoring device for overhead lines according to claim 7, characterized in that said GPS positioning module is composed of a GPS module whose model is NEO-6M. 9. The insulation monitoring device for lightning arresters for overhead lines according to claim 4, characterized in that said wireless communication module is a GPRS wireless communication module.