CN201708591U - Electric energy harmonic monitoring remote alarm device of a 10-20kV transformer platform area - Google Patents

Abstract

The utility model is a remote alarm device for monitoring electric energy harmonics in a 10-20kV transformer station area, comprising a harmonic signal acquisition circuit, a harmonic signal judgment circuit, and an alarm communication circuit; the output of the harmonic signal acquisition circuit is connected to the harmonic The signal judging circuit, the output of the harmonic signal judging circuit is connected to the alarm communication circuit; the harmonic signal of the power supply collected from the distribution transformer station area passes through the alarm communication circuit, and is connected to the distribution network intelligent control center or the electrician's mobile phone; when the distribution transformer When a harmonic occurs in the power supply during operation, the signal acquisition circuit collects the harmonic signal, and the signal calculation and comparison circuit judges that the harmonic exceeds the standard, and immediately transmits the signal to the alarm transmitting circuit for remote alarm, and the on-duty personnel will go to the scene immediately after receiving the alarm. processing; the intelligent alarm device uses advanced electronic technology to develop an intelligent management of harmonics in the operation of distribution transformers, shortens the time for accident processing, improves power supply, increases corporate and social benefits, and intelligentizes the distribution system. Technological development also played a positive role in promoting.

Description

10-20kV transformer station area electric energy harmonic monitoring remote alarm device

technical field

The invention relates to a 10-20kV power distribution transformer station area electric energy harmonic monitoring remote alarm technology, which is applied to the remote alarm for electric energy harmonics that occur when the power supply transformer station area of a distribution network is running.

Background technique

At present, with the rapid development of industrial and agricultural production, the rapid improvement of the national economy, the continuous improvement of people's living standards, the unprecedented development of the power industry, and the rapid development of the national power grid construction. Electricity is transformed and delivered to thousands of households through distribution transformers. Due to the wide variety of electrical equipment, some electrical equipment generates harmonics and injects them into the grid, which destroys the power quality. Because the system cannot monitor the harmonics in real time, it basically takes a long time to deal with the fault, which has a great impact on the power failure of the user. Therefore, the reliability of the power supply is low, and the damage rate of the equipment is high, which cannot meet the requirements of the continuous improvement of people's living standards. If it can Comprehensively promote the application of electric energy harmonic monitoring and remote alarm technology. When harmonics occur in the transformer station area, the maintenance personnel will go to the scene to repair in time, shorten the accident processing time, increase the power supply, and increase corporate and social benefits. At the same time, it also plays a positive role in promoting the development of intelligent technology in power distribution system.

Contents of the invention

The invention aims at the deficiencies of the prior art, thereby providing a device with scientific design, low cost and high power supply reliability, which can overcome the existing deficiencies.

In order to achieve the above purpose, the present invention provides a remote alarm device for monitoring electric energy harmonics in the distribution transformer station area, including a harmonic signal acquisition circuit, a harmonic signal judgment circuit, and an alarm communication circuit;

Wherein, the output of the harmonic signal acquisition circuit is connected to the harmonic signal judging circuit, and the output of the harmonic signal judging circuit is connected to the alarm communication circuit; the power supply harmonic signal collected from the distribution transformer station area is connected to the alarm communication circuit through the alarm communication circuit. Distribution network intelligent control center, or electrician's mobile phone.

The harmonic signal acquisition and judgment circuit includes a harmonic signal acquisition circuit, a signal calculation and comparison circuit, and an execution circuit; the harmonic signal acquisition circuit is connected to the signal calculation and comparison circuit, and the signal calculation and comparison circuit is connected to the execution circuit.

The alarm communication circuit includes a fiber optic cable and a light emitting circuit; the light emitting circuit converts the electrical signal of the remote alarm device for monitoring the power harmonics in the distribution transformer station area into an optical signal and transmits it to the power supply intelligent control center through the fiber optic cable.

The alarm circuit is a wireless alarm transmitting circuit including a signal input circuit, an encoding circuit, and a transmitting circuit; the output of the signal input circuit is connected to the encoding circuit, and the encoding circuit is connected to the transmitting circuit, and the transmitting alarm signal is transmitted to the distribution network power supply intelligence control center, or the electrician's mobile phone.

The 10-20kV distribution transformer station area electric energy harmonic monitoring remote alarm device uses advanced electronic technology to develop an intelligent management of harmonics that occur in the distribution transformer station area operation. Compared with the prior art, the present invention has outstanding advantages Substantive features and significant progress, specifically, the distribution transformer station area power harmonic monitoring remote alarm device technology progress, reasonable design, ideally realize the distribution transformer station area power harmonic monitoring remote alarm intelligent management, It will play an active role in guaranteeing the safe operation of the power grid. The specific advantages of the remote alarm device for power harmonic monitoring in the 10-20kV distribution transformer area:

The 10-20kV distribution transformer station area power harmonic monitoring remote alarm device of the present invention, when a harmonic accident occurs during the operation of the distribution transformer, the maintenance personnel will go to the scene to repair it in time, shorten the accident processing time, and increase the power supply. Increase corporate and social benefits. At the same time, it also plays a positive role in promoting the development of intelligent technology in power distribution system.

The safety operation management of the distribution network is strengthened, the reliability of power supply is greatly improved, and the overall level of safety management of the distribution network is improved.

Description of drawings

Fig. 1 is a block diagram of a remote alarm device for monitoring electric energy harmonics in a 10-20kV transformer station area of the present invention;

Fig. 2 is the electrical energy harmonic signal collection, the block diagram of judging circuit of the present invention;

Fig. 3 A is the circuit block diagram of optical fiber communication cable of the present invention;

Fig. 3B is a block diagram of the wireless alarm circuit of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

Fig. 1 is a block diagram of a remote alarm device for monitoring electric energy harmonics in a 10-20kV transformer station area of the present invention, the device includes a harmonic signal acquisition circuit 1, a harmonic signal judgment circuit 2, and an alarm communication circuit 3;

Wherein, the output of the harmonic signal acquisition circuit is connected to the harmonic signal judging circuit, and the output of the harmonic signal judging circuit is connected to the alarm communication circuit; the harmonic signal of the power supply collected from the distribution transformer station area is transmitted through the alarm communication circuit To the intelligent control center of the distribution network, or on the electrician's mobile phone.

The harmonic signal acquisition and judgment circuit is installed on the low side of the distribution transformer. When harmonics occur, the signal acquisition and judgment circuit will immediately transmit this signal to the transmitting circuit for alarm. deal with.

Fig. 2 is the electrical energy harmonic signal acquisition of the present invention, the judgment circuit wiring diagram, comprises harmonic signal acquisition circuit 21, signal calculation comparison circuit 22, execution circuit 23; Described harmonic signal acquisition circuit is connected with described signal calculation comparison circuit, signal The calculation comparison circuit is connected to the execution circuit.

When harmonics occur in the power supply of the distribution transformer station area in operation, the signal acquisition circuit collects the harmonic signal, and the signal calculation and comparison circuit judges that the harmonic exceeds the standard, and immediately transmits this signal to the alarm transmitting circuit for remote alarm, and the on-duty personnel Get the alarm situation immediately to the scene for processing.

3A is a block diagram of the optical fiber communication cable circuit of the present invention; it includes an optical transmitting circuit 35 and an optical fiber cable 36; the optical transmitting circuit converts the harmonic electrical signal of the distribution transformer power supply into an optical signal, and transmits it to the distribution intelligent control center through the optical fiber cable.

When harmonics occur in the distribution transformer, the remote alarm device encodes according to the regulations through the transmitting circuit of the optical transceiver, and converts the electrical signal into an optical signal and transmits it outward through the optical fiber cable.

3B is a block diagram of the wireless alarm circuit of the present invention, the wireless alarm transmitting circuit includes a signal input circuit 31, an encoding circuit 32, and a transmitting circuit 33; the signal input circuit is connected to the signal judging circuit, and the signal input circuit The circuit output is connected to the coding circuit, and the coding circuit is connected to the transmitting circuit.

The wireless alarm transmitting circuit can adopt a mobile phone module or a wireless transmitting circuit.

When harmonics occur in the power supply of the distribution transformer in operation, the signal is immediately transmitted to the transmitting circuit for remote alarm, and the harmonic signal is transmitted to the mobile phone of the on-duty personnel. The on-duty personnel immediately go to the scene to deal with the alarm situation.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: the present invention can still be Modifications to the specific implementation of the invention or equivalent replacement of some technical features; without departing from the spirit of the technical solution of the present invention, should be included in the scope of the technical solution claimed in the present invention.

Claims (4)

1. 10～20kV transformer platform district electric energy harmonic wave monitor remote warning device is characterized in that: comprise the harmonic signal Acquisition Circuit, harmonic signal decision circuitry, Alarm Communication circuit;

Wherein, described harmonic signal Acquisition Circuit output connects described harmonic signal decision circuitry, and the output of harmonic signal decision circuitry connects described Alarm Communication circuit; Collect the supply harmonic signal from distribution transformer platform district by the Alarm Communication circuit, connect on distribution intelligent control center or the electrician's mobile phone.

2. 10～20kV transformer platform according to claim 1 district electric energy harmonic wave monitor remote warning device, it is characterized in that: harmonic signal collection, decision circuitry comprise the harmonic signal Acquisition Circuit, calculated signals comparison circuit, executive circuit; Described harmonic signal Acquisition Circuit connects described calculated signals comparison circuit, and the calculated signals comparison circuit connects described executive circuit.

3. 10～20kV transformer platform according to claim 1 district electric energy harmonic wave monitor remote warning device, it is characterized in that: the Alarm Communication circuit comprises fiber optic cables, optical transmission circuit; Described optical transmission circuit changes the signal of telecommunication of distribution transformer platform district electric energy harmonic wave monitor remote intelligent alarm device into light signal and is transmitted to supply intelligent control centre by fiber optic cables.

4. 10～20kV transformer platform according to claim 1 district electric energy harmonic wave monitor remote warning device is characterized in that: described warning circuit is that wireless alarming emissioning circuit comprises signal input circuit, coding circuit, radiating circuit; Described signal input circuit output connects described coding circuit, and coding circuit connects described radiating circuit, and the emission alarm signal passes on distribution supply intelligent control centre or the electrician's mobile phone.

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