CN219224971U - Feeder terminal simulation test tool - Google Patents
Feeder terminal simulation test tool Download PDFInfo
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- CN219224971U CN219224971U CN202320034996.2U CN202320034996U CN219224971U CN 219224971 U CN219224971 U CN 219224971U CN 202320034996 U CN202320034996 U CN 202320034996U CN 219224971 U CN219224971 U CN 219224971U
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- feeder terminal
- microprocessor
- relay
- switching
- closing
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Abstract
The utility model discloses a feeder terminal simulation test tool, which is connected with a feeder terminal and is used for simulating primary equipment to test the feeder terminal, and comprises the following components: the power supply comprises a relay, a power supply processor, a microprocessor and a DAC output unit; the relay and the power supply processor are both connected with the feeder terminal, the power supply processor is connected with the microprocessor, and the microprocessor is also connected with the DAC output unit; the utility model can simulate the switching-on and switching-off operation of primary equipment, switching-on and switching-off position signals, energy storage states and analog quantity output; the device can completely replace primary equipment to carry out simulation test, and has the advantages of small volume, light weight, no restriction of places, convenience in movement and the like.
Description
Technical Field
The utility model relates to the technical field of power distribution, in particular to a feeder terminal simulation test tool.
Background
The power distribution terminal (FTU for short) has remote control, remote measurement, remote signaling and fault detection functions, is communicated with the power distribution automation main station, provides information required by the running condition and various parameters of a power distribution system and monitoring control, comprises a switch state, electric energy parameters, interphase faults, grounding faults and parameters during faults, executes commands issued by the power distribution main station, adjusts and controls the power distribution equipment, realizes functions of fault positioning, fault isolation, rapid recovery of power supply in non-fault areas and the like, is suitable for the automation engineering of power distribution networks of cities, rural areas and enterprises, and completes the automation functions of monitoring, controlling, protecting and communicating of ring main units and pole switches. Normal monitoring and fault identification, isolation and non-fault section restoration power supply of the distribution line are realized by matching with the distribution electronic station and the main station.
Therefore, the reliability of the feeder terminal has close relation with the reliability of the power distribution network, multiple tests are required to be carried out on the feeder terminal to ensure the reliability of the feeder terminal, but most of primary equipment is high-voltage equipment, and the FTU is required to be pulled to a site with fixed high voltage to be connected with the primary equipment for testing. The investment of the high-pressure field is large, the test scale is limited, the operation is inconvenient, and the high-pressure potential safety hazard exists.
Therefore, how to provide a feeder terminal simulation test tool convenient to move is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the utility model provides a feeder terminal simulation test tool, which replaces primary equipment to complete the simulation test of the feeder terminal, and has the advantages of small volume, light weight, no site limitation, convenient movement and the like.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a feeder terminal simulation test fixture connected with a feeder terminal for simulating primary equipment to test the feeder terminal, comprising: the power supply comprises a relay, a power supply processor, a microprocessor and a DAC output unit;
the relay and the power supply processor are both connected with the feeder terminal, the power supply processor is connected with the microprocessor, and the microprocessor is also connected with the DAC output unit;
the relay is used for acquiring an opening and closing analog signal of the feeder terminal, finishing opening and closing operations according to the opening and closing analog signal and feeding back an opening and closing state to the feeder terminal; the relay comprises a closing relay and a dividing relay, the closing relay and the dividing relay are connected with the feeder terminal, when the switching-on/off analog signal is a closing signal, the dividing relay is disconnected, and the closing relay is closed and outputs a closing signal to simulate a switching-on state of primary equipment; when the switching-on/off analog signal is a switching-on signal, the switching-off relay is switched on, the switching-on relay is switched off, and the switching-off signal is output to simulate the switching-off state of the primary equipment;
the power supply processor is used for converting the current provided by the feeder terminal to supply power to the DAC output unit and the microprocessor;
the microprocessor is used for sending an analog output control signal to the DAC output unit;
and the DAC output unit is used for converting and outputting corresponding alternating current signals to the feeder terminal for testing according to the analog output control signals.
Preferably, the analog output control signals include an adjustable double-sided 3-phase voltage control signal, a 3-phase current control signal, a zero sequence current control signal, and a zero sequence voltage control signal.
Preferably, the microprocessor comprises a first SPI interface, and the microprocessor is connected with the DAC output unit through the first SPI interface.
Preferably, the remote control state indicator is connected with the relay and used for displaying the opening and closing state.
Preferably, the device further comprises an output adjusting knob, wherein the output adjusting knob is connected with the microprocessor and used for adjusting the magnitude of the alternating current signal output by the DAC output unit through clockwise rotation or anticlockwise rotation.
Preferably, the microprocessor further comprises an IO interface, and the output adjusting knob is connected with the microprocessor through the IO interface.
Preferably, the device further comprises an output display, wherein the output display is connected with the microprocessor and used for displaying the magnitude of the alternating current signal.
Preferably, the microprocessor further comprises a second SPI interface, and the output display is connected with the microprocessor through the second SPI interface.
Compared with the prior art, the feeder terminal simulation test tool provided by the utility model can be used for avoiding complex operation and wiring error faults of multiple wiring by only connecting with a feeder terminal by using one aviation plug wire; according to the characteristic that the energy storage of the feeder terminal has continuous output voltage, the utility model directly provides electric energy by the energy storage output of the feeder terminal, thereby achieving the purposes of reducing the volume and the weight. The utility model can realize the output of 3-phase voltage (3 power sides and 3 load sides) and 3-phase current, zero-sequence current and zero-sequence voltage of the adjustable double sides of the analog primary equipment, and satisfies the telemetry function test of the feeder terminal.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a feeder terminal simulation test tool provided by the utility model;
fig. 2 is a schematic diagram of a DAC output unit according to an embodiment of the utility model;
FIG. 3 is a schematic waveform diagram of the output adjusting knob according to the embodiment of the present utility model when the output adjusting knob is rotated clockwise;
fig. 4 is a schematic waveform diagram of the output adjusting knob according to an embodiment of the present utility model when rotated counterclockwise.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The embodiment of the utility model discloses a feeder terminal simulation test tool, which is connected with a feeder terminal and is used for simulating primary equipment to test the feeder terminal, as shown in fig. 1, and comprises the following steps: the power supply comprises a relay, a power supply processor, a microprocessor and a DAC output unit;
the relay and the power supply processor are both connected with the feeder terminal, the power supply processor is connected with the microprocessor, and the microprocessor is also connected with the DAC output unit;
the relay is used for acquiring an opening and closing analog signal of the feeder terminal, finishing opening and closing operations according to the opening and closing analog signal and feeding back an opening and closing state to the feeder terminal;
the relay comprises a closing relay and a dividing relay, the closing relay and the dividing relay are connected with the feeder terminal, when the dividing and closing analog signal is a closing signal, the dividing relay is disconnected, and the closing relay is closed and outputs the closing signal to simulate the closing state of primary equipment; when the switching-on/off analog signal is a switching-on/off signal, the switching-on/off relay is switched on, and the switching-on/off relay is switched off and outputs the switching-on/off signal to simulate the switching-on/off state of the primary equipment;
the power supply processor is used for converting the current provided by the feeder terminal into the DAC output unit and supplying power to the microprocessor;
a microprocessor for transmitting an analog output control signal to the DAC output unit;
and the DAC output unit is used for converting and outputting corresponding alternating current signals to the feeder terminal for testing according to the analog output control signals.
It should be noted that:
the relay cooperates with the feeder terminal to simulate the switching-on and switching-off operation of the primary equipment, and is the same as the primary equipment, when the switching-on and switching-off operation is executed, the switching-on and switching-off relay is closed to output a switching-on and switching-off signal, and the switching-on and switching-off relay automatically switches on and off the switching-on and switching-off signal to stop, and vice versa.
The power supply processor obtains electric energy from the feeder terminal and provides power for the microprocessor and the DAC output unit, in the embodiment, the 24V voltage of the feeder terminal is respectively converted into 3.3V, 5V, +12V and 12V by each power supply conversion module in the power supply processor to provide power for the microprocessor (3.3V), and the DAC output unit (5V and +/-12V) provides power.
The microprocessor is a minimum system consisting of STM32F103 and peripheral circuits; the DAC output unit includes an AD5689 chip and OPA2277 op-amp peripheral circuits, as shown in fig. 2.
In order to further implement the above technical solution, the analog output control signals include an adjustable double-sided 3-phase voltage control signal, a 3-phase current control signal, a zero-sequence current control signal and a zero-sequence voltage control signal.
In order to further implement the technical scheme, the microprocessor comprises a first SPI interface, and the microprocessor is connected with the DAC output unit through the first SPI interface.
In order to further implement the technical scheme, the remote control state indicator lamp is further included, and the remote control state indicator lamp is connected with the relay and used for displaying the opening and closing state.
It should be noted that:
the on-off state is indicated by two LED lamps, when the feeder terminal executes on-off remote control operation, if the relay acts normally, the on-off remote control function of the feeder terminal is normal, and the corresponding on-off state indicator lights are turned on to indicate that the operation is effective.
In order to further implement the above technical scheme, the device further comprises an output adjusting knob, wherein the output adjusting knob is connected with the microprocessor and is used for adjusting the magnitude of the alternating current signal output by the DAC output unit through clockwise rotation or anticlockwise rotation.
It should be noted that:
the output adjusting knob can generate two square wave outputs A and B after rotating; these signals together constitute the quadrature output of the rotary knob incremental encoder. By observing the state in which the a and B outputs are changing, the direction of the encoder is determined. The difference in clockwise rotation and counterclockwise rotation is determined by the reverse order of the states of a and B in the output values.
When rotated clockwise, the state of channel a is reversed, then the state of channel B is reversed, and then the control IC recognizes that the voltage output is turned up, as shown in fig. 3.
When rotated counterclockwise, the state of channel B is reversed, then the state of channel a is reversed again, and then the control IC recognizes that the voltage output is turned down, as shown in fig. 4.
In order to further implement the technical scheme, the microprocessor further comprises an IO interface, and the output adjusting knob is connected with the microprocessor through the IO interface.
It should be noted that:
the microprocessor uses three IO interfaces to identify the operation of the output adjust knob input.
In order to further implement the above technical scheme, the device further comprises an output display, wherein the output display is connected with the microprocessor and used for displaying the magnitude of the alternating current signal.
In order to further implement the technical scheme, the microprocessor also comprises a second SPI interface, and the output display is connected with the microprocessor through the second SPI interface.
In this embodiment, the output liquid crystal screen is a 128×64 dot matrix liquid crystal module with a second SPI interface, and is controlled by a microprocessor to display the voltage output by the DAC, and the selected channel is adjusted by rotating the knob, so as to implement visual output adjustment in cooperation with the adjustment knob.
The DAC output unit of the test tool is in a modularized design, the SPI bus is connected with the main control, the channel expansion can be realized, and a plurality of IO ports are arranged to realize multi-channel alternating current signal output.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A feeder terminal simulation test fixture, connected with a feeder terminal, for simulating a primary device to test the feeder terminal, comprising: the power supply comprises a relay, a power supply processor, a microprocessor and a DAC output unit;
the relay and the power supply processor are both connected with the feeder terminal, the power supply processor is connected with the microprocessor, and the microprocessor is also connected with the DAC output unit;
the relay is used for acquiring an opening and closing analog signal of the feeder terminal, finishing opening and closing operations according to the opening and closing analog signal and feeding back an opening and closing state to the feeder terminal;
the relay comprises a closing relay and a dividing relay, the closing relay and the dividing relay are connected with the feeder terminal, when the switching-on/off analog signal is a closing signal, the dividing relay is disconnected, and the closing relay is closed and outputs a closing signal to simulate a switching-on state of primary equipment; when the switching-on/off analog signal is a switching-on signal, the switching-off relay is switched on, the switching-on relay is switched off, and the switching-off signal is output to simulate the switching-off state of the primary equipment;
the power supply processor is used for converting the current provided by the feeder terminal to supply power to the DAC output unit and the microprocessor;
the microprocessor is used for sending an analog output control signal to the DAC output unit;
and the DAC output unit is used for converting and outputting corresponding alternating current signals to the feeder terminal for testing according to the analog output control signals.
2. A feeder terminal simulation test fixture according to claim 1, wherein the simulation output control signals comprise an adjustable double-sided 3-phase voltage control signal, a 3-phase current control signal, a zero sequence current control signal and a zero sequence voltage control signal.
3. The feeder terminal simulation test tool according to claim 1, wherein the microprocessor comprises a first SPI interface, and the microprocessor is connected with the DAC output unit through the first SPI interface.
4. The feeder terminal simulation test fixture of claim 1, further comprising a remote control status indicator lamp, wherein the remote control status indicator lamp is connected with the relay and is used for displaying the opening and closing status.
5. The feeder terminal simulation test tool according to claim 1, further comprising an output adjusting knob, wherein the output adjusting knob is connected to the microprocessor and is used for adjusting the magnitude of the alternating current signal output by the DAC output unit through clockwise rotation or counterclockwise rotation.
6. The feeder terminal simulation test tool according to claim 5, wherein the microprocessor further comprises an IO interface, and the output adjusting knob is connected with the microprocessor through the IO interface.
7. The feeder terminal simulation test tool of claim 1, further comprising an output display, wherein the output display is connected to the microprocessor and is configured to display the magnitude of the ac signal.
8. A feeder terminal simulation test fixture according to claim 7, wherein the microprocessor further comprises a second SPI interface, and the output display is connected to the microprocessor through the second SPI interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320034996.2U CN219224971U (en) | 2023-01-06 | 2023-01-06 | Feeder terminal simulation test tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320034996.2U CN219224971U (en) | 2023-01-06 | 2023-01-06 | Feeder terminal simulation test tool |
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| Publication Number | Publication Date |
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| CN219224971U true CN219224971U (en) | 2023-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320034996.2U Active CN219224971U (en) | 2023-01-06 | 2023-01-06 | Feeder terminal simulation test tool |
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| CN (1) | CN219224971U (en) |
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2023
- 2023-01-06 CN CN202320034996.2U patent/CN219224971U/en active Active
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