CN207249015U - Distribution power automation terminal remote auto test device - Google Patents

Abstract

The utility model provides a remote automatic test device for distribution automation terminals, which includes a central control unit, a signal generator, an information exchange unit, and an equipment operation state monitoring and control unit. The signal input terminal of the signal generator is connected to the central control unit connected, the central control unit is connected to the equipment operation state monitoring control unit through the information exchange unit, the signal output terminal of the signal generator is connected to the power distribution terminal, the equipment operation state monitoring control unit is connected to the power distribution terminal, and the information exchange unit Also connected to the automation master. Relying on informatization and automation technology, the utility model can realize the transition from "manual" test to "automatic" test, improve the production efficiency of protection devices, reduce production costs, improve the electronic level of management, and improve the quality of automatic test of power distribution terminals.

Description

Distribution automation terminal remote automatic test device

technical field

The utility model relates to the technical field of power distribution automation testing, in particular to a remote automatic testing device for power distribution automation terminals.

Background technique

With the rapid development of the national economy and the substantial improvement of people's living standards, the demand for electricity has become increasingly strong, and at the same time higher requirements have been put forward for the reliability, safety and quality of power supply. As the last link of power system generation, transmission, distribution and use, distribution network is the hub connecting users and transmission system.

At present, the test task before the power distribution device is put into production is heavy, and it is necessary to conduct a comprehensive test on the power distribution terminal to ensure that the terminal can correctly implement the requirements of the power distribution master station. The traditional test process needs to manually apply various test signals on the power distribution terminal, and observe the results of the applied signals at the automation master station. This test method is limited by personal quality and human resources itself, and mistakes are prone to occur during the test process. , and there are many repeated testing items, the implementation cycle is long, and the testing tasks are often not completed in time.

Contents of the invention

Aiming at the above-mentioned deficiencies in the prior art, the utility model provides a remote automatic test device for power distribution automation terminals, which can realize the transformation from "manual" test to "automatic" test by relying on informatization and automation technology, and improve the protection device. Improve production efficiency, reduce production costs, improve the electronic level of management, and improve the quality of automatic testing of power distribution terminals.

A remote automatic test device for power distribution automation terminals, including a central control unit, a signal generator, an information exchange unit, and an equipment operation status monitoring and control unit, the signal input end of the signal generator is connected to the central control unit, and the The central control unit is connected to the equipment operation state monitoring control unit through the information exchange unit, the signal output terminal of the signal generator is connected to the power distribution terminal, the equipment operation state monitoring control unit is connected to the power distribution terminal, and the information exchange unit is also connected to the automation main Station connection; the central control unit is used to control the signal generator to generate a test signal, the test signal is applied to the power distribution terminal for testing, and the equipment operation status monitoring control unit is used to collect the operation status of the power distribution terminal and collect the collected data via the information exchange unit The signal is transmitted back to the central control unit, and the central control unit judges whether the telemetry information uploaded by the power distribution terminal is correct by comparing the applied test signal and the returned collection signal; The running state monitoring and control unit issues remote control instructions, and the equipment running state monitoring and control unit implements control operations on the power distribution terminal, and detects the remote signaling status after the power distribution terminal performs the control operation, and sends the remote signaling status back to the central control unit. The central control unit judges whether the remote control and remote signaling functions are correct by comparing the issued remote control instructions and the returned remote signaling status.

Further, the signal generator includes a sequentially connected single-chip microcomputer, a drive circuit, a power amplifier, a power supply connected to the power amplifier, and a serial communication interface connected to the single-chip microcomputer. After the digital signal, the drive circuit is controlled, and the power amplifier is driven to generate a corresponding test signal to the power distribution terminal according to the size of the digital signal to test the power distribution terminal.

Further, the information exchange unit includes a DSP chip circuit and a first serial communication interface connected to the DSP chip circuit, a second serial communication interface, and an Ethernet communication interface, and the information exchange unit communicates with the equipment running state monitoring through the first serial communication interface The control unit performs information interaction, performs information interaction with the central control unit through the second serial port communication interface, and performs information interaction with the automation master station through the Ethernet communication interface.

Further, the information exchange unit includes a DSP chip circuit and a first serial communication interface connected to the DSP chip circuit, a second serial communication interface, and a wireless communication module, and the information exchange unit monitors and controls the operation status of the equipment through the first serial communication interface The unit conducts information exchange, conducts information exchange with the central control unit through the second serial port communication interface, and conducts information exchange with the automation master station through the wireless communication module.

Further, the information exchange unit is connected to the automation master station through a two-way isolation device for wireless communication.

Further, the equipment operation state monitoring control unit includes a DSP chip circuit, an AD conversion circuit connected to the DSP chip circuit, a DA conversion circuit, a serial communication interface, a voltage transformer connected to the AD conversion circuit, a current transformer, and a The drive circuit to which the DA conversion circuit is connected.

Further, the voltage transformer and current transformer preprocess the output signal of the power distribution terminal, and then enter the DSP chip circuit through the AD conversion circuit, and communicate with the information exchange unit through the serial communication interface according to the RS485 protocol, and the collected The collected signal of the power distribution terminal is sent back to the central control unit through the information exchange unit, and the equipment operation status monitoring control unit communicates with the information exchange unit through the serial port communication interface. After receiving the remote control command issued by the central control unit, it controls the DA conversion The circuit outputs the corresponding control operation, and controls the corresponding relay through the driving circuit to realize the operation.

Further, the central control unit is an industrial computer.

The utility model transforms from manual application of test signals, manual observation, manual issuance of remote control instructions, and manual judgment of the completion of remote control execution to "automatic" testing means, which shortens the debugging cycle and improves debugging efficiency; replaces manpower with machines, reduces communication links, and reduces personnel Labor intensity; use automatic analysis and judgment methods instead of manual observation and statistics to reduce errors and improve the quality of monitoring information testing.

Description of drawings

Fig. 1 is the block diagram of the circuit module of Embodiment 1 of the remote automatic test device of the distribution automation terminal of the present invention;

Fig. 2 is the block diagram of the circuit module of the signal generator in the utility model embodiment one;

Fig. 3 is the block diagram of the circuit module of the information exchange unit in the utility model embodiment one;

Fig. 4 is the block diagram of the circuit module of the monitoring control unit of the equipment running state in the first embodiment of the utility model;

Fig. 5 is a circuit module block diagram of Embodiment 2 of the remote automatic test device for the distribution automation terminal of the utility model;

Fig. 6 is a block diagram of the circuit module of the information exchange unit in the second embodiment of the present invention.

In the figure: 1—central control unit, 2—signal generator, 3—information exchange unit, 4—equipment operation status monitoring control unit, 5—power distribution terminal, 6—automation master station, 7—two-way isolation device, 21— Single chip microcomputer, 22—drive circuit, 23—power amplifier, 24—power supply, 25—serial communication interface, 31—DSP chip circuit, 32—first serial communication interface, 33—second serial communication interface, 34—Ethernet communication Interface, 35—wireless communication module, 41—DSP chip circuit, 42—voltage transformer, 43—current transformer, 44—AD conversion circuit, 45—DA conversion circuit, 46—drive circuit, 47—serial port communication interface.

Detailed ways

The technical solution in the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the utility model.

Please refer to Fig. 1, embodiment one of the remote automatic test device of the distribution automation terminal of the present invention includes a central control unit 1, a signal generator 2, an information exchange unit 3 and an equipment operation state monitoring control unit 4, and the signal generator 2 The signal input terminal is connected to the central control unit 1, the central control unit 1 is connected to the equipment operation status monitoring control unit 4 through the information exchange unit 3, the signal output terminal of the signal generator 2 is connected to the power distribution terminal 5, The equipment operation status monitoring control unit 4 is connected to the power distribution terminal 5 , and the information exchange unit 3 is also connected to the automation master station 6 .

The central control unit 1 is a commonly used industrial computer with multiple serial ports and Ethernet interfaces. Its main function is to send and receive digital signals, to complete the process control of the entire test and to judge whether the test results are correct. The central control unit 1 controls the whole test process, and the main automatic test items include remote measurement test, remote control and remote signal test.

1. Telemetry test: the control signal generator 2 generates a test signal, and the test signal is applied to the power distribution terminal 5 under test, and the equipment operation status monitoring control unit 4 collects the equipment operation status through a sensor (such as a voltage transformer or a current transformer). The status is sent back to the central control unit 1 via the information exchange unit 3 . The central control unit 1 judges whether the telemetry information uploaded by the power distribution terminal 5 is correct or not by comparing the applied test signal with the returned collected signal.

2. Remote control and remote signaling test: the central control unit 1 sends a remote control command to the equipment operation status monitoring control unit 4 via the signal exchange unit 3, and the equipment operation status monitoring control unit 4 sends the terminal under test (power distribution terminal 5) through the driving circuit. The control operation is implemented, and at the same time, the monitoring and control unit 4 of the equipment running state detects the state of the power distribution terminal 5 after the control operation is performed (referred to as the remote signaling state), and sends the remote signaling state back to the central control unit 1 . The central control unit 1 judges whether the remote control and remote signaling functions are correct by comparing the issued remote control command with the returned remote signaling status.

Please continue to refer to FIG. 2 , the signal generator 2 includes a single-chip microcomputer 21 connected in sequence, a drive circuit 22 , a power amplifier 23 and a power supply 24 connected with the power amplifier 23 and a serial communication interface 25 connected with the single-chip microcomputer 21 . After the single-chip microcomputer 21 receives the digital signal issued by the central control unit 1 through the serial port communication interface 25, it controls the driving circuit 22, and drives the power amplifier 23 to generate corresponding test signals such as voltage and current according to the size of the digital signal to the power distribution terminal 5, and It can output multiple channels of analog information at the same time, and the maximum power of the analog signal can reach 1 kilowatt.

Please continue to refer to FIG. 3 , the main function of the information exchange unit 3 is to be responsible for the information exchange between the equipment operation status monitoring control unit 4 , the automation master station 6 and the central control unit 1 . The information exchange unit 3 includes a DSP chip circuit 31 and a first serial communication interface 32 , a second serial communication interface 33 , and an Ethernet communication interface 34 connected to the DSP chip circuit 31 . The information exchange unit 3 performs information interaction with the equipment operation status monitoring control unit 4 through the first serial communication interface 32, performs information interaction with the central control unit 1 through the second serial communication interface 33, and communicates with the automation master station 6 through the Ethernet communication interface 34. For information exchange.

The information sent by the power distribution terminal 5 to the information exchange unit 3 is sent to the automation master station 6 and the central control unit 1 respectively according to the mode of sending and receiving twice, and the information returned by the automation master station 6 is sent to the central control unit 1 .

Please continue to refer to FIG. 4 , the main function of the equipment operation status monitoring control unit 4 is to monitor and control the operation of the power distribution terminal 5 , and issue corresponding control operations according to the instructions of the central control unit 1 . Described equipment running status monitoring control unit 4 comprises DSP chip circuit 41, the AD conversion circuit 44 that is connected with DSP chip circuit 41, DA conversion circuit 45, serial port communication interface 47, memory (ROM, RAM etc.), also includes and AD conversion The circuit 44 is connected to a voltage transformer 42 , a current transformer 43 and a drive circuit 46 connected to a DA conversion circuit 45 .

The specific working principle of the equipment running state monitoring control unit 4 is as follows:

1. Monitoring function: the equipment running state monitoring control unit 4 preprocesses the output signal of the power distribution terminal 5 through the voltage transformer 42 and the current transformer 43, and then enters the DSP chip circuit 41 through the AD conversion circuit 44, and passes through the serial port The communication interface 47 communicates with the information exchange unit 3 according to the RS485 protocol, and transmits the collected equipment operation status (collection signal) to the central control unit 1 via the information exchange unit 3 .

2. Control function: the equipment running state monitoring control unit 4 communicates with the information exchange unit 3 through the serial port communication interface 47, and controls the DA conversion circuit 45 to output the corresponding control operation after receiving the remote control command issued by the central control unit 1 , and control the corresponding relay through the driving circuit 46 to realize the operation, so as to implement the control operation on the terminal under test (power distribution terminal 5).

The automation master station 6 is a platform for receiving terminal remote signaling and telemetry information, and usually has a long distance from the commissioning field equipment (central control unit 1, information exchange unit 3, signal generator 2 and power distribution terminal 5), It communicates with the information exchange unit 3 mainly by optical fiber, and the communication protocol is the 104 protocol. The automation master station 6 adopts NARI's open3200 system. The automation master station 6 records the received change information of the power distribution terminal 5 and returns it to the central control unit 1 through the information exchange unit 3 .

The communication and connection mode of each module in the utility model are as follows:

(1) The central control unit 1 and the information exchange unit 3 communicate directly through the serial port, and the communication protocol is the RS485 protocol.

(2) Ethernet is used for communication between the information exchange unit 3 and the automation master station 6, and the communication protocol is the 104 protocol.

(3) The serial port is used for communication between the central control unit 1 and the information number generator 2, and the protocol is the RS485 protocol.

(4) The signal generator 2 directly applies the power signal to the device under test (power distribution terminal 5).

(5) Equipment operation status monitoring control unit 4 collects the operation status information of the equipment under test through sensor elements such as voltage transformer 42 and current transformer 43, and controls the corresponding relay through the drive circuit 46 to realize the control of the equipment under test .

Please continue to refer to Fig. 5, which is a circuit module block diagram of the second embodiment of the remote automatic test device for the distribution automation terminal of the present invention. The difference between it and the first embodiment is that the information exchange unit 3 and the automation master station 6 are wirelessly connected. Yes, a two-way isolating device 7 is provided between the information exchange unit 3 and the automation master station 6, the information exchange unit 3 and the two-way isolating device 7 are connected by wireless communication, the automation master station 6 is connected by wireless communication with the two-way isolating device 7, and the two-way The function of the isolation device 7 is to isolate the network to ensure the security of reading and writing network data.

Please continue to refer to Fig. 6, described information exchange unit 3 comprises DSP chip circuit 31 and the first serial port communication interface 32 that is connected with DSP chip circuit 31, the second serial port communication interface 33, wireless communication module 35, information exchange unit 3 passes through A serial communication interface 32 exchanges information with the equipment operation status monitoring control unit 4 , exchanges information with the central control unit 1 through the second serial communication interface 33 , and exchanges information with the automation master station 6 through the wireless communication module 35 . Specifically, the wireless communication module 35 of the information exchange unit 3 performs wireless communication with the two-way isolating device 7, and the automation master station 6 also performs wireless communication with the two-way isolating device 7 through its built-in wireless communication module.

The utility model has the following beneficial effects:

1. Use "automatic" testing methods instead of "manual" testing methods to shorten the debugging cycle and improve debugging efficiency.

2. Use machines to replace manpower, reduce communication links, and reduce labor intensity.

3. Use automatic analysis and judgment methods instead of manual observation and statistics to reduce errors and improve the quality of monitoring information testing.

4. Automatic production analysis report, automatic statistical monitoring information test completion.

5. It can realize the test of multiple power distribution terminals at the same time.

The above is only a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any skilled person in the technical field can easily think of changes within the technical scope disclosed in the utility model Or replacement, all should be covered within the scope of protection of the present utility model.

Claims (7)

1. A remote automatic test device for distribution automation terminals, characterized in that: it comprises a central control unit (1), a signal generator (2), an information exchange unit (3) and an equipment operating state monitoring control unit (4), so that The signal input terminal of the signal generator (2) is connected with the central control unit (1), and the central control unit (1) is connected with the equipment operation status monitoring control unit (4) through the information exchange unit (3), so The signal output terminal of the signal generator (2) is connected to the power distribution terminal (5), the equipment operation status monitoring control unit (4) is connected to the power distribution terminal (5), and the information exchange unit (3) is also connected to the automation master station ( 6) connection; the central control unit (1) is used to control the signal generator (2) to generate a test signal, the test signal is applied to the power distribution terminal (5) for testing, and the equipment operation status monitoring control unit (4) is used to Collect the operating status of the power distribution terminal (5) and send the collected signal back to the central control unit (1) via the information exchange unit (3), and the central control unit (1) compares the applied test signal with the returned collected signal, Judging whether the telemetry information uploaded by the power distribution terminal (5) is correct; the central control unit (1) is also used to issue remote control instructions to the equipment operation state monitoring control unit (4) via the signal exchange unit (3), and the equipment operation state The monitoring control unit (4) performs control operations on the power distribution terminal (5), and detects the remote signaling state after the power distribution terminal (5) performs the control operation, and sends the remote signaling state back to the central control unit (1), and the central The control unit (1) judges whether the remote control and remote signaling functions are correct by comparing the issued remote control command and the returned remote signaling state, and the information exchange unit (3) includes a DSP chip circuit (31) and a DSP chip circuit (31) ) connected first serial port communication interface (32), the second serial port communication interface (33), Ethernet communication interface (34), the information exchange unit (3) monitors and controls with the equipment running state through the first serial port communication interface (32) The unit (4) performs information interaction with the central control unit (1) through the second serial port communication interface (33), and performs information interaction with the automation master station (6) through the Ethernet communication interface (34). 2. The remote automatic test device of power distribution automation terminal as claimed in claim 1, characterized in that: said signal generator (2) comprises a single-chip microcomputer (21), a drive circuit (22), a power amplifier (23) connected in sequence , the power supply (24) that is connected with power amplifier (23), the serial communication interface (25) that is connected with single-chip microcomputer (21), described single-chip microcomputer (21) receives central control unit (1) down by serial communication interface (25). After sending the digital signal, the drive circuit (22) is controlled, and the power amplifier (23) is driven to generate a corresponding test signal to the power distribution terminal (5) according to the size of the digital signal to test the power distribution terminal (5). 3. The remote automatic test device for power distribution automation terminal as claimed in claim 1 or 2, characterized in that: the information exchange unit (3) comprises a DSP chip circuit (31) and a first connected to the DSP chip circuit (31) A serial port communication interface (32), a second serial port communication interface (33), a wireless communication module (35), and the information exchange unit (3) communicates with the equipment running state monitoring control unit (4) through the first serial port communication interface (32) The information exchange is carried out with the central control unit (1) through the second serial port communication interface (33), and with the automation master station (6) through the wireless communication module (35). 4. The remote automatic test device for power distribution automation terminal according to claim 3, characterized in that: the wireless communication connection between the information exchange unit (3) and the automation master station (6) is carried out through a bidirectional isolation device (7). 5. The remote automatic test device for power distribution automation terminal as claimed in claim 1 or 2, characterized in that: the equipment operation status monitoring control unit (4) includes a DSP chip circuit (41), and a DSP chip circuit (41) Connected AD conversion circuit (44), DA conversion circuit (45), serial port communication interface (47), voltage transformer (42) connected with AD conversion circuit (44), current transformer (43) and DA conversion The drive circuit (46) connected to the circuit (45). 6. The remote automatic test device for power distribution automation terminals as claimed in claim 5, characterized in that: voltage transformers (42), current transformers (43) are pre-processed to the output signals of power distribution terminals (5), Then enter the DSP chip circuit (41) through the AD conversion circuit (44), and communicate with the information exchange unit (3) according to the RS485 protocol through the serial port communication interface (47), and the acquisition signal of the power distribution terminal (5) collected via The information exchange unit (3) is sent back to the central control unit (1), and the equipment operation status monitoring control unit (4) communicates with the information exchange unit (3) through the serial port communication interface (47), and receives the central control unit ( 1) After the remote control command is issued, the DA conversion circuit (45) is controlled to output the corresponding control operation, and the corresponding relay is controlled through the drive circuit (46) to realize the operation. 7. The remote automatic test device for power distribution automation terminal according to claim 1, characterized in that: the central control unit (1) is an industrial computer.