CN214750605U - Relay protection outlet matrix detection equipment - Google Patents
Relay protection outlet matrix detection equipment Download PDFInfo
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- CN214750605U CN214750605U CN202120693870.7U CN202120693870U CN214750605U CN 214750605 U CN214750605 U CN 214750605U CN 202120693870 U CN202120693870 U CN 202120693870U CN 214750605 U CN214750605 U CN 214750605U
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Abstract
The utility model discloses a relay protection outlet matrix detection device, which comprises a plurality of paths of detection probes arranged on a detected device and sampling processing circuits respectively connected with the detection probes, wherein each path of sampling processing circuit is respectively connected with a test control and data processing part after passing through an isolation circuit; the output end of the test control and data processing part is respectively connected with a state information display interface and a storage communication module; the sampling processing circuit has a multi-path synchronous detection function, can detect information of a multi-path outlet pressing plate at the same time, and transmits the information to the data processing center through the isolation circuit, so that mutual interference is reduced. The test control data processing part processes the received data and transmits the processed data to the state information display, the test state information of each pressing plate is displayed and kept in real time, and the amplitude and the width of the display pulse signal are judged by the voltage value and the indicator light. The data information is automatically saved in the mobile memory after the test is completed.
Description
Technical Field
The utility model relates to an electric power detects technical field, concretely relates to relay protection export matrix check out test set.
Background
At present, for the detection of a relay protection exit matrix, an access contact is opened mainly by depending on the switching value of a relay protection tester, but only a trip standby contact can be measured, and the exit matrix cannot be measured comprehensively, and particularly, the problem is more prominent when the exit matrix situation of a 220kV conventional transformer substation is more complicated, such as the verification work of 220kV line protection, main transformer protection, bus differential protection and the like; the other common method is a method of measuring the outlet pressing plates one by adopting a single point of a multimeter, but the protection action condition needs to be simulated repeatedly for many times, so that the method is large and complicated in quantity, low in efficiency, potential safety hazards and error and omission detection phenomena exist, data can only be seen to flash once, the amplitude and the width of pulse voltage cannot be known, the detected data is not accurate and comprehensive, and accurate data recording and storage are not available. Therefore, the effect of the relay protection outlet matrix detection can be influenced, hidden dangers are left for the relay protection not to act correctly, and once the power grid fails, the stable operation of the power grid can be directly damaged. Therefore, research on a relay protection exit matrix detection system is necessary, safe and efficient automatic detection and recording, processing, analyzing and sharing of measured data are realized, a safe and effective method and means are provided for correct action exit detection of relay protection equipment, and safe operation of power grid equipment is guaranteed.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a relay protection exit matrix detection device; the technical problem can be effectively solved.
The utility model discloses a following technical scheme realizes:
a relay protection outlet matrix detection device comprises a power supply module for supplying power to a system, wherein the power supply module is connected with each module circuit and supplies power to the module; the system also comprises a plurality of paths of detection probes arranged on the detected device and sampling processing circuits respectively connected with the detection probes, wherein each path of sampling processing circuit is respectively connected with the test control and data processing part after passing through the isolation circuit; the output end of the test control and data processing part is respectively connected with a state information display interface and a storage communication module; the sampling processing circuit has a multi-path synchronous detection function, can simultaneously detect the information of a multi-path outlet pressure plate and transmits the information to the data processing center through the isolation circuit; the test control data processing part transmits the processed data to a state information display interface according to the received data, displays and maintains the test state information of each pressure plate in real time, and judges the amplitude and the width of the display pulse signal by the voltage value and the indicator light; the data information is automatically saved in the mobile memory after the test is completed.
Furthermore, the test control and data processing part adopts a single chip embedded system with the model number of STM32F103ZET6, has 16 input ends, can simultaneously detect 16 paths of outlet information and can set the name of each path of outlet; the resolution of the measurement data is processed for 1ms, and the amplitude and width of the fault pulse can be judged at the same time.
Furthermore, the sampling processing circuit comprises a voltage reduction circuit, a follower and a reverse amplifier, and when a fault signal of-300V to +300V is measured and input, the measurement signal of 0-3.3V can be output through the adjustment of the voltage reduction circuit, the follower and the reverse amplifier.
Furthermore, the isolation circuit adopts HCNR201 linear optical coupler isolation, and can output the input measurement signal to an AD port of the single chip microcomputer test control and data processing part for analysis and processing by the test control and data processing part.
Furthermore, the state information display interface adopts a touch screen, and an input window capable of setting the names of the outlet matrix pressing plates and the test dates corresponding to the multiple paths is arranged on the state information display interface; and start test, stop test and data storage, system reset button used for test function operation; and the interface is used for displaying the name of the road pressure plate, the amplitude of signal pulse voltage, the maintenance information indicator light and the action state of the simulation protection relay contact.
Advantageous effects
The utility model provides a relay protection export matrix check out test set, relay protection check out test set and method compare, it has following beneficial effect:
(1) test control and data processing, data storage in this technical scheme: this part adopts STM32F103ZET6 singlechip embedded system, can carry out data processing and communication control at a high speed, through serial ports and touch-sensitive screen communication, realizes test operation, data processing, information display, data storage.
(2) The sampling processing circuit of the technical scheme comprises a voltage reduction circuit, a follower and a backward amplifier, can adapt to various voltage levels of a detection site, meets the AD input requirement of a single chip microcomputer system, can convert fault signals of-300V to +300V into 0-3.3VAD input signals after being processed by the circuit, and is convenient for the single chip microcomputer system to analyze and process. The voltage reduction circuit and the follower are used for impedance isolation to avoid multipath interference; the design of the reverse amplifier can obtain a measuring signal of 0-3.3V at the output through the adjustment of the voltage reduction circuit, the follower and the reverse amplifier when the measuring input is a fault signal of-300V to + 300V. And the sampling processing circuit is designed with a multi-path synchronous detection function, and can simultaneously detect the information of the multi-path outlet pressing plate.
(3) The isolation circuit of the technical scheme adopts HCNR201 linear optical coupler isolation, so that the mutual interference of multiple paths of signals and the impact danger of a high-voltage circuit of an external system to a single chip microcomputer system can be reduced; meanwhile, the device has the advantages of interference resistance, good linearity and capability of well meeting the detection requirement. The input 0-3.3V measuring signal can be output to the AD port of the singlechip safely in a high-speed, linear and way, and can be analyzed and processed by the singlechip system.
(4) The state information display interface of the technical scheme selects the touch screen as the operation and display interface, and has the advantages of simplicity and convenience in operation, clear data information display and the like. The name of the outlet matrix pressing plate and the test date corresponding to 16 paths can be set. And (4) test function operation: starting test, stopping test, saving data and resetting the system. And (3) information display: 16-path pressing plate names, signal pulse voltage amplitude values, holding information indicator lamps, simulation protection relay contact action states and the like. The test operation is simple and convenient, the data information is displayed clearly, and the test data is stored synchronously.
Drawings
Fig. 1 is a block diagram of the overall architecture of the present invention.
Fig. 2 is a circuit diagram of the sampling processing circuit of the present invention.
Fig. 3 is an isolation circuit diagram of the present invention.
Fig. 4 is a touch screen interface diagram of the present invention.
Fig. 5 is an overall circuit diagram of the single chip microcomputer of the present invention.
Fig. 6 is a circuit diagram of the input circuit of the single chip microcomputer of the present invention.
Fig. 7 is a serial communication circuit diagram of the present invention.
Fig. 8 is a circuit diagram of the USB storage interface of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Example 1
As shown in fig. 1, a relay protection outlet matrix detection device includes a power module for supplying power to a system, where the power module is connected to each module circuit to supply power to the module; the system also comprises 16 detection probes arranged on the detected device and sampling processing circuits respectively connected with the detection probes, wherein each sampling processing circuit is respectively connected with the test control and data processing part through an isolation circuit; the output end of the test control and data processing part is respectively connected with a state information display interface and a storage communication module. The sampling processing circuit has a 16-path synchronous detection function, can simultaneously detect the information of 16-path outlet pressure plates and transmits the information to the data processing center through the isolation circuit; the test control data processing part transmits the processed data to a state information display interface according to the received data, displays and maintains the test state information of each pressure plate in real time, and judges the amplitude and the width of the display pulse signal by the voltage value and the indicator light; the data information is automatically saved in the mobile memory after the test is completed.
As shown in FIG. 2, the sampling processing circuit can convert fault signals of-300V to +300V into AD input signals of 0-3.3V after being processed by the circuit, so as to adapt to various voltage levels of a detection field and meet the AD input requirements of a single chip microcomputer system, and the single chip microcomputer system can conveniently analyze and process. The device comprises a port CN2 connected with a detection probe, wherein the rear side of the port CN2 is connected with a voltage reduction circuit consisting of resistors R1 and R2, the voltage reduction circuit is stabilized by a resistor R3 and then connected with a U1-1 follower, the output end of the follower is respectively connected with adjustable resistors W1 and W2, and the rear side of the adjustable resistor is connected with a reverse amplifier U1-2; the output terminal of the inverting amplifier U1-2 is connected to an isolation circuit.
Wherein: r1 and R2 form a voltage reduction circuit; u1-1 is a follower for impedance isolation to avoid multi-path interference; u1-2 is a reverse amplifier, when measuring the fault signal with input of-300V- +300V, the measuring signal of 0-3.3V can be obtained at the output through R2 voltage division and W2 and W1 adjustment. The design has 16 synchronous detection functions, and can simultaneously detect the information of 16 outlet pressing plates.
As shown in fig. 3, in order to reduce the mutual interference of multiple signals and the impact risk of a high-voltage circuit of an external system on a single chip microcomputer system, the isolation circuit adopts HCNR201 linear optocoupler isolation, which can not only resist interference, but also have good linearity, and well meet the detection requirements. The sampling circuit comprises an input end R10 connected with the output end of the sampling processing circuit, an operational amplifier U2 and an operational amplifier U3 are connected to the rear side of the input end, an operational amplifier of the model OP07CP is adopted by the operational amplifier U2 and the operational amplifier U3, and the operational amplifier is suitable for processing direct-current signals; an HCNR201 linear optical coupler isolator is connected between the operational amplifier U2 and the operational amplifier U3; the back side of the operational amplifier U3 is connected with a CN1 port connected with the serial port of the singlechip, the CN1 port is connected with a CH1 of an input circuit of the singlechip, and the output of the input circuit is connected with an analog input (AD) port PC4 of the singlechip (as shown in figure 6). The input 0-3.3V measuring signal can be output to the AD port of the singlechip safely in a high-speed, linear and way, and can be analyzed and processed by the singlechip system.
As shown in fig. 4, the state information display interface selects a touch screen as the operation and display interface, and has the advantages of simple operation, clear data information display, and the like. The state information display interface is provided with an input window which can be used for setting the names of the outlet matrix pressing plates and the test dates corresponding to the multiple paths; the name of the outlet matrix pressing plate and the test date corresponding to 16 paths can be set. And start test, stop test and data storage, system reset button used for test function operation; and (4) test function operation: starting test, stopping test, saving data and resetting the system. And the interface is used for displaying the name of the road pressure plate, the amplitude of signal pulse voltage, the maintenance information indicator light and the action state of the simulation protection relay contact. And (3) information display: 16-path pressing plate names, signal pulse voltage amplitude values, holding information indicator lamps, simulation protection relay contact action states and the like.
After the test is started, the system starts to detect a measuring signal, and when a pulse signal is input, if the signal amplitude is greater than 30V, the signal width is greater than 3mS but less than 5mS, the indicator lamp on the system is turned on, but the voltage value is not kept to be displayed; if it is more than 5mS, the indicator lamp is lighted while the measured value display is maintained, and the next pulse signal of the path is detected and processed as well. And stopping when the test is finished, stopping the system and storing the data. Resetting can clear all display information of the interface. The design of the state information display interface ensures that the test operation is simple and convenient, the data information is displayed clearly, and the test data is synchronously stored.
As shown in fig. 5-8, the test control and data processing part adopts a single chip embedded system of model STM32F103ZET6, and has 16 input ports connected with the detection probes from CH1 to CH 16; 16 paths of outlet information can be detected simultaneously, and the name of each path of outlet can be set; the resolution of the measurement data is processed for 1ms, and the amplitude and width of the fault pulse can be judged at the same time. The device can perform data processing and communication control at high speed, and realizes test operation, data processing, information display and data storage through the communication between the serial port and the touch screen. The test signal input is isolated by a follower (shown in figure 6), then sent to an AD port of the singlechip for operation and processing, and then transmitted to a touch screen for display; FIG. 7 shows a serial communication interface connected to a touch screen to implement communication control of the touch screen; FIG. 8 illustrates a USB memory control port for implementing data storage.
Claims (5)
1. A relay protection outlet matrix detection device comprises a power supply module for supplying power to a system, wherein the power supply module is connected with each module circuit and supplies power to the module; the method is characterized in that: the system also comprises a plurality of paths of detection probes arranged on the detected device and sampling processing circuits respectively connected with the detection probes, wherein each path of sampling processing circuit is respectively connected with the test control and data processing part after passing through the isolation circuit; the output end of the test control and data processing part is respectively connected with a state information display interface and a storage communication module; the sampling processing circuit has a multi-path synchronous detection function, can simultaneously detect the information of a multi-path outlet pressure plate and transmits the information to the data processing center through the isolation circuit; the test control data processing part transmits the processed data to a state information display interface according to the received data, displays and maintains the test state information of each pressure plate in real time, and judges the amplitude and the width of the display pulse signal by the voltage value and the indicator light; the data information is automatically saved in the mobile memory after the test is completed.
2. The relay protection outlet matrix detection device of claim 1, wherein: the test control and data processing part adopts a single chip embedded system with the model number of STM32F103ZET6, has 16 input ends, can simultaneously detect 16 exit information and can set the name of each exit; the resolution of the measurement data is processed for 1ms, and the amplitude and width of the fault pulse can be judged at the same time.
3. The relay protection outlet matrix detection device of claim 1, wherein: the sampling processing circuit comprises a voltage reduction circuit, a follower and a reverse amplifier, and when a fault signal of-300V to +300V is measured and input, the measurement signal of 0-3.3V can be output through the adjustment of the voltage reduction circuit, the follower and the reverse amplifier.
4. The relay protection outlet matrix detection device of claim 1, wherein: the isolation circuit adopts HCNR201 linear optical coupler isolation, and can output an input measurement signal to an AD port of the single chip microcomputer test control and data processing part for analysis and processing by the test control and data processing part.
5. The relay protection outlet matrix detection device of claim 1, wherein: the state information display interface adopts a touch screen, and is provided with an input window for setting the names of the outlet matrix pressing plates and the test dates corresponding to multiple paths; and start test, stop test and data storage, system reset button used for test function operation; and the interface is used for displaying the name of the road pressure plate, the amplitude of signal pulse voltage, the maintenance information indicator light and the action state of the simulation protection relay contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120693870.7U CN214750605U (en) | 2021-04-06 | 2021-04-06 | Relay protection outlet matrix detection equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120693870.7U CN214750605U (en) | 2021-04-06 | 2021-04-06 | Relay protection outlet matrix detection equipment |
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| CN214750605U true CN214750605U (en) | 2021-11-16 |
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| CN202120693870.7U Active CN214750605U (en) | 2021-04-06 | 2021-04-06 | Relay protection outlet matrix detection equipment |
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- 2021-04-06 CN CN202120693870.7U patent/CN214750605U/en active Active
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