CN102280932A - Intelligent control device of high-voltage section switch - Google Patents

Abstract

The invention is an intelligent control device for a high-voltage segmental switch, which includes a signal data acquisition circuit, a signal data calculation and judgment circuit, a switch operation circuit, and an optical transceiver circuit; Calculation and judgment circuit, optical transceiver circuit; the output of the signal data calculation and judgment circuit is connected to the high-voltage segment switch operation circuit and the optical transceiver circuit; the high-voltage segment switch operation circuit is connected to the optical transceiver circuit, and the optical transceiver circuit is connected to the optical fiber communication cable circuit, and the optical fiber communication cable circuit Connect to the intelligent control center of the distribution network; the intelligent control device has protection and automatic operation functions. According to the setting, the current in operation and the temperature of the cable can be seen at any time through telemetry and remote signaling, and remote switching can be performed at any time according to the on-site operation needs of the switch Operation, shortening the operating switch time, the intelligent control device plays a positive role in promoting the development of intelligent control of power distribution.

Description

High-voltage section switch intelligent control device

technical field

The invention relates to an intelligent control technology of a high-voltage section switch, specifically, an intelligent control device for a high-voltage section switch applied to a distribution network.

Background technique

At present, the power system is fully developing smart grid construction, implementing intelligent control, intelligent management, and intelligent analysis of the entire grid. The intelligent construction of distribution network has only just started, and it has not been fully popularized and applied due to various reasons. The research on intelligent control technology for distribution network power supply is also part of the popularization and application of intelligent distribution network construction, mainly for distribution transformers and load switches. Implement intelligent control and intelligent management.

The research and construction of intelligent control technology for high-voltage segmental switches in distribution network will greatly promote the safe operation of power distribution system equipment. Currently, the power distribution system equipment in operation is basically out of order because it cannot be monitored in real time, and the user will notify Maintenance; low power supply quality and high equipment damage rate. If the intelligent control technology of high-voltage sectional switch of distribution network can be fully promoted and applied, it will play a vital role in the development of intelligent control technology of power distribution system.

Contents of the invention

The purpose of the present invention is achieved by the following technical solutions:

The intelligent control device of the high-voltage section switch includes a signal data acquisition circuit, a signal data calculation and judgment circuit, a switch operation circuit, and an optical transceiver circuit;

Wherein, the signal data acquisition circuit is connected to the signal data calculation and judgment circuit and the optical transceiver circuit from the signal data collected from the high-voltage segmental switching power supply system; the signal data calculation and judgment circuit output is connected to the switch operation circuit and the optical transceiver circuit; The switch operation circuit is connected to the optical transceiver circuit, the optical transceiver circuit is connected to the optical fiber communication cable circuit, and the optical fiber communication cable circuit is connected to the distribution network intelligent control center.

The signal data acquisition circuit includes a high-voltage segmental switch opening and closing position signal acquisition circuit, a cable temperature signal acquisition circuit, a current signal acquisition circuit, and a phase line grounding signal acquisition circuit; the cable temperature signal acquisition circuit and the output terminal of the current signal acquisition circuit The head is connected to the signal data calculation and judgment circuit and the optical transceiver circuit; the output terminal of the phase line grounding signal acquisition circuit is connected to the optical transceiver circuit;

Wherein, the high-voltage section switch opening and closing position signal acquisition circuit collects the opening and closing position signals from the auxiliary contact of the switch operation structure, and is connected to the optical transceiver circuit;

The cable temperature signal acquisition circuit is to connect the digital temperature sensor of the temperature detection element to a certain position of the cable head, collect the cable temperature data signal from the temperature detection element, and connect it to the signal data calculation and judgment circuit and the optical transceiver circuit;

The current signal acquisition circuit is to convert the L1, L2, L3 three-phase power supply current through the current transformer and the load resistance to output the current signal suitable for the requirements, and connect to the signal data calculation and judgment circuit and the optical transceiver circuit.

The phase wire grounding signal acquisition circuit outputs a current signal suitable for requirements after being transformed by a zero-sequence current transformer and a load resistance, and is connected to the optical transceiver circuit.

The signal data calculation and judgment circuit includes an A/D conversion circuit, a calculation and judgment circuit, and an actuator; the input end of the A/D conversion circuit is connected to the output end of the signal data acquisition circuit, and the output of the A/D conversion circuit is connected to the The above-mentioned data calculation and judgment circuit, the output of the data calculation and judgment circuit is connected to the actuator; the output of the actuator has two terminals, one terminal is connected to the switch operation circuit, and the other terminal is connected to the optical transceiver circuit.

The switch operation circuit includes the closing control circuit of the electric mechanism of the high-voltage section switch and the opening control circuit of the electric mechanism of the high-voltage section switch; the input signals of the switch operation circuit come from the signal data calculation and judgment circuit and the optical transceiver receiving circuit respectively;

Wherein, the high-voltage section switch closing control circuit refers to the high-voltage section switch motor closing circuit of the operation;

The high-voltage section switch opening control circuit refers to the high-voltage load section switch electric mechanism opening circuit of the operation;

The optical transceiver circuit includes an optical fiber cable, an optical receiving circuit, and an optical transmitting circuit; one end of the optical receiving circuit is connected to an optical fiber cable, which receives signals from the power supply intelligent control center, converts optical signals into electrical signals, and transmits them to the segment switch intelligence The control device; the other end is connected to the optical transmitting circuit, which converts the electrical signal of the segment switch intelligent control device into an optical signal and transmits it to the power supply intelligent control center through the optical fiber cable.

The high-voltage section switch intelligent control device uses advanced computer technology, monitoring technology, control technology, and communication technology to develop a high-voltage section switch remote control, real-time status data detection, and intelligent monitoring device for power distribution systems. . Compared with the prior art, the present invention has outstanding substantive features and remarkable progress. Specifically, the high-voltage segmental switch intelligent control device has advanced technology, reasonable design, and ideally realizes high-voltage segmental switch electrical intelligent control and intelligent management. It will play a positive role in promoting the development of automatic control of power grid power distribution system. The specific advantages of the intelligent control device for high-voltage segmental switches:

1. The intelligent control device of the high-voltage segmental switch monitors the safe operation of the power supply at any time. It has protection and automatic operation functions. According to the setting, it can automatically cut off the fault line to improve the reliability and safety of the power supply.

2. The intelligent control device of the high-voltage segmental switch monitors the operation of the power supply at any time, and the current of the power supply and the temperature of the power supply cable can be seen at any time through telemetry and remote signaling.

3. The intelligent control device of the high-voltage section switch has a remote operation switch, which can be switched at any time according to the on-site operation status of the switch, and can be operated remotely. The operator does not go to the switch site, shortening the operating switch time and reducing the loss.

Description of drawings

Fig. 1 is a compositional block diagram of the intelligent control device of the high-voltage section switch of the present invention;

Fig. 2 is a block diagram of signal data acquisition circuit of the present invention;

Fig. 3 is a block diagram of signal data calculation and judgment circuit of the present invention;

Fig. 4 is a block diagram of the switch operation circuit of the present invention;

Fig. 5 is a block diagram of the composition of the optical transceiver circuit of the present invention

Detailed ways

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

As shown in Figure 1, it is a block diagram of the composition of the intelligent control device of the high-voltage subsection switch of the present invention, the device includes a signal data acquisition circuit 1, a signal data calculation and judgment circuit 2, a switch operation circuit 3, and an optical transceiver circuit 4;

The signal data acquisition circuit is connected to the signal data calculation and judgment circuit and the optical transceiver circuit when the signal data is collected from the high-voltage segmental switching power supply system; the output of the signal data calculation and judgment circuit is connected to the high-voltage segmental switch operation circuit and the optical transceiver circuit; the optical transceiver circuit is connected to the high-voltage segment switch operating circuit, the optical transceiver circuit is connected to the optical fiber communication cable circuit, and the optical fiber communication cable circuit is connected to the distribution network intelligent control center.

The high-voltage sectional switch intelligent control device, the signal data acquisition circuit collects the real-time status data signal output from the high-voltage sectional switch power supply system, and transmits them to the data calculation and judgment circuit and the optical transceiver circuit respectively, and various signal data pass through the data calculation and judgment processing circuit Make a comparison and judge, if the equipment fails to start the protection action, the signal is transmitted to the high-voltage section switch operating circuit to trip the switch, and at the same time, the signal is transmitted to the transmitter circuit of the optical transceiver circuit, and the electrician is notified of the status change of the high-voltage section switch.

When the high-voltage section switch needs to change the state, the electrician can operate it remotely through the optical fiber communication cable circuit and the high-voltage section switch operation circuit, without going to the high-voltage section switch site.

When the electrician needs to know the operation status of the on-site high-voltage sectional switch, such as current and cable temperature, he can directly check the operation parameters of the on-site equipment through the optical fiber communication cable circuit, the signal data acquisition circuit, and the remote call.

Fig. 2 is the block diagram of data signal acquisition circuit of the present invention, and signal data acquisition circuit comprises described high-voltage subsection switch branch, closing position signal acquisition circuit 2A, cable temperature signal acquisition circuit 2B, current signal acquisition circuit 2C, phase line grounding Signal acquisition circuit 2E.

One end of the data signal acquisition circuit is connected to the signal data calculation and judgment circuit, and the other end is connected to the optical transceiver circuit;

The signal acquisition circuit for the opening and closing position of the high-voltage segmental switch is to collect the opening and closing position signal from the auxiliary contact of the switch operation structure, and connect it to the optical transceiver circuit;

The cable temperature signal acquisition circuit is to connect the digital temperature sensor of the temperature detection element to a certain position of the cable head, collect the cable temperature data from the temperature detection element, and connect it to the signal data calculation and judgment circuit; when the collected temperature data passes the calculation If it is higher than the specified value, an alarm signal will be issued. When the electrician is on a normal inspection, he can check the temperature value of the cable from a distance.

The current signal acquisition circuit is to output the current signal suitable for the requirements of the three-phase power supply current of L1, L2 and L3 through the current transformer and the load resistance, and output the access signal data calculation and judgment circuit; when a problem occurs in the power supply system, the microcomputer If the calculated current parameter exceeds the specified value, an over-current alarm signal is issued, or a trip occurs.

The phase wire grounding signal acquisition circuit outputs a current signal suitable for requirements after being transformed by a zero-sequence current transformer and a load resistance, and is connected to the optical transceiver circuit. The sequence current transformer detects the grounding signal of the phase line, and sends an alarm signal through the optical transceiver circuit, and the electrician can conduct a quick inspection to find the specific location.

Fig. 3 is a block diagram of the signal data calculation and judgment circuit of the present invention, the signal data calculation and judgment circuit includes: A/D conversion circuit 31, calculation and judgment circuit 32, executive element 33; said executive element output has two ends, one end is connected The switch operation circuit, the other end is connected to the optical transceiver circuit.

The input end of the A/D conversion circuit 31 is connected to the output end of the signal data acquisition circuit, the output of the A/D conversion circuit is connected to the calculation and judgment circuit 32, and the output of the calculation and judgment circuit is connected to the executive element 33, One end of the actuator output is connected to the switch operation circuit, and the other end is connected to the optical transceiver circuit.

After the data calculation and judgment circuit obtains various signal data from the signal acquisition circuit, the signal data is input into the calculation and judgment circuit through A/D conversion for calculation and comparison, and the comparison result is output to the actuator for switching or alarming.

Fig. 4 is a block diagram of the switch operation circuit of the present invention, the switch operation circuit includes the closing control circuit 41 of the electric mechanism of the high-voltage load section switch and the opening control circuit 42 of the electric mechanism of the high-voltage section switch.

The switch operation signals come from the signal data calculation and judgment circuit and the output terminal of the receiving circuit of the optical transceiver circuit;

The high-voltage section switch opening and closing control circuit refers to the high-voltage section switch electric mechanism opening and closing circuit of the operation; when the high-voltage section switch obtains the opening and closing signals, the high-voltage section switch automatically Opening and closing operations, and alarm notification after the state of the high-voltage section switch changes.

Fig. 5 is the composition block diagram of optical transceiver circuit of the present invention, and optical transceiver circuit comprises light receiving circuit 51, light transmitting circuit 52, optical fiber cable 53; Signal, convert the optical signal into an electrical signal output and send it to the intelligent control device of the high-voltage segment switch; the other end is connected to the optical transmitting circuit, convert the electrical signal of the intelligent control device of the high-voltage segment switch into an optical signal, and transmit it to the intelligent control device of the power supply through the optical fiber cable center.

When the intelligent control device of the high-voltage segmental switch transmits a signal, the transmitting circuit of the optical transceiver performs encoding according to the regulations, and converts the electrical signal into an optical signal and transmits it outward through the optical fiber cable. When the receiving circuit of the optical transceiver receives a certain optical signal, it is converted into an electrical signal and output to the high-voltage segment switch intelligent control device.

When the on-duty personnel need to operate the high-voltage section switch remotely and in time, they can transmit the operation signal through the optical fiber cable circuit in the distribution network intelligent control center, which can shorten a lot of time and improve safety and reliability. When the on-duty personnel need to check the system equipment, they can check various operating conditions one by one through the optical fiber cable circuit in the distribution network intelligent control center.

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 (5)

1. a high-pressure subsection switch intelligence controlling device is characterized in that: comprise the signal data acquisition circuit, signal data calculating decision circuitry, switching manipulation circuit, optical transceiver circuit;

Wherein, described signal data acquisition circuit collects signal data output from the high-pressure subsection switch power supply system and connects described signal data calculating decision circuitry, optical transceiver circuit; Signal data calculates decision circuitry output and connects described switching manipulation circuit, optical transceiver circuit; Described switching manipulation circuit connects the optical transceiver circuit, and the optical transceiver circuit connects the optical fibre communication cable circuit, and the optical fibre communication cable circuit connects the distribution intelligent control center.

2. high-pressure subsection switch intelligence controlling device according to claim 1, it is characterized in that: the signal data acquisition circuit comprises high-pressure subsection switch branch, closing position signal acquisition circuit, the cable temperature signal acquisition circuit, current signal Acquisition Circuit, phase line ground signalling Acquisition Circuit; Described cable temperature signal acquisition circuit, current signal Acquisition Circuit output termination connect signal data and calculate decision circuitry, optical transceiver circuit; Phase line ground signalling Acquisition Circuit output termination connects described optical transceiver circuit;

Wherein, described high-pressure subsection switch branch, closing position signal acquisition circuit are to gather branch, closing position signal from described switching manipulation structure auxiliary contact, are connected in the optical transceiver circuit;

Described cable temperature signal acquisition circuit is that the detector unit digital temperature sensor is connected in a certain position of described cable end, gathers the cable temperature data-signal from detector unit, is connected in signal data and calculates decision circuitry, optical transceiver circuit;

Described current signal Acquisition Circuit is that L1, L2, L3 three phase mains electric current are exported the current signal that is fit to requirement after current transformer and load resistance conversion, inserts signal data and calculates decision circuitry, optical transceiver circuit.

Described phase line ground signalling Acquisition Circuit is the current signal that output is fit to requirement after zero sequence current mutual inductor and load resistance conversion, inserts the optical transceiver circuit.

3. high-pressure subsection switch intelligence controlling device according to claim 1 is characterized in that: signal data calculates decision circuitry and comprises the A/D translation circuit, calculates decision circuitry, executive component; Described A/D translation circuit input is exported a termination with described signal data acquisition circuit and is connected, and the output of A/D translation circuit connects described data computation decision circuitry, and the output of data computation decision circuitry connects described executive component; Described executive component output has two terminations, a termination to connect described switching manipulation circuit, and another termination connects described optical transceiver circuit.

4. high-pressure subsection switch intelligence controlling device according to claim 1, it is characterized in that: the switching manipulation circuit comprises the contacting controling circuit of high-pressure subsection switch motor drive mechanism, the sub-gate control circuit of high-pressure subsection switch motor drive mechanism; The switching manipulation circuit input signal calculates decision circuitry, optical transceiver receiving circuit from signal data respectively;

Wherein, described high-pressure subsection switch contacting controling circuit is meant the high-pressure subsection switch motor drive mechanism closing circuit of described operation;

Described high-pressure subsection switch sub-gate control circuit is meant the high-pressure subsection switch motor drive mechanism sub-gate circuit of described operation.

5. high-pressure subsection switch intelligence controlling device according to claim 1, it is characterized in that: the optical transceiver circuit comprises fiber optic cables, optical receiving circuit, optical transmission circuit; Described optical receiving circuit one end connects fiber optic cables, is to receive the signal that transmits from supply intelligent control centre, changes light signal into the signal of telecommunication and sends the block switch intelligence controlling device to; The other end connects optical transmission circuit, changes the signal of telecommunication of block switch intelligence controlling device into light signal and is transmitted to supply intelligent control centre by fiber optic cables.

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