CN219831268U - Relay protection testing device - Google Patents
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- CN219831268U CN219831268U CN202320623107.6U CN202320623107U CN219831268U CN 219831268 U CN219831268 U CN 219831268U CN 202320623107 U CN202320623107 U CN 202320623107U CN 219831268 U CN219831268 U CN 219831268U
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Abstract
The utility model provides a relay protection testing device which is connected with an upper computer and comprises a circuit board and a shell, wherein the circuit board comprises: the switching value module, the control module, the power amplifier module and the optical fiber serial port module, and the circuit board is connected with the inner wall of the shell. The utility model collects the input switching value signals and outputs voltage digital quantity, current digital quantity and small signal digital quantity to the power amplification module respectively through the control module, and the voltage analog quantity power amplifier, the current analog quantity power amplifier and the low-level small signal are output after the processing of the power amplification module. In addition, the control module outputs a corresponding optical digital signal by receiving the optical signal input by the optical fiber serial port module. The utility model has the dual functions of analog output and digital output, and realizes the effect of simultaneously outputting voltage/current analog power amplifier, low-level small signal and optical digital signal.
Description
Technical Field
The utility model relates to the technical field of power equipment, in particular to a relay protection testing device.
Background
At present, the relay protection device plays a role in guaranteeing the stability of the power system, and the performance test of the relay protection device is completed by a special relay protection test device. The traditional relay protection testing device has the functions of analog quantity and optical digital quantity output due to the architecture limitation of system design, so that the increasingly complex working condition of an intelligent substation cannot be met, and hidden danger is brought to the safe and stable operation of an electric power system.
Accordingly, the prior art is still in need of improvement and development.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present utility model aims to provide a relay protection testing device, so as to solve the problem that the existing relay protection testing device cannot output analog quantity and optical digital quantity at the same time.
The technical scheme of the utility model is as follows:
the relay protection testing device is connected with an upper computer and comprises a shell and a circuit board; the circuit board comprises a switching value module, a control module, a power amplifier module and an optical fiber serial port module; the circuit board is connected with the inner wall of the shell;
the switching value module is connected with the control module and is used for collecting and inputting switching value signals to the control module and receiving switching value signals controlled and output by the control module;
the optical fiber serial port module is connected with the control module; the optical fiber serial port module is used for receiving optical signals output by the upper computer and outputting the optical signals to the control module, and the optical fiber serial port module is also used for receiving optical digital signals output by the control module;
the control module is respectively connected with the switching value module, the power amplification module and the optical fiber serial port module, and is used for receiving switching value signals acquired and input by the switching value module, controlling and outputting corresponding switching value signals to the switching value module, outputting corresponding voltage digital values, current digital values and small signal digital values to the power amplification module according to the switching value signals, and outputting the optical digital signals to the optical fiber serial port module;
the power amplification module is connected with the control module and is used for outputting a voltage analog quantity power amplifier, a current analog quantity power amplifier and a low-level small signal according to the voltage digital quantity, the current digital quantity and the small-signal digital quantity.
According to a further arrangement of the utility model, the control module further comprises: an FPGA unit;
the FPGA unit is connected with the optical fiber serial port module, and is used for receiving the optical signals output by the optical fiber serial port module, decoding and converting the optical signals into optical digital signals and outputting the optical digital signals to the optical fiber serial port module.
In a further arrangement of the present utility model, the power amplifier module includes: a first digital-to-analog converter and a voltage power amplifier;
one end of the first digital-to-analog converter is connected with the control module through an LVDS differential bus, and the other end of the first digital-to-analog converter is connected with the voltage power amplifier and is used for converting the voltage digital quantity output by the control module into a voltage analog quantity and outputting the voltage analog quantity to the voltage power amplifier.
In a further arrangement of the present utility model, the power amplifier module further includes: a second digital-to-analog converter and a current power amplifier;
one end of the second digital-to-analog converter is connected with the control module through an LVDS differential bus, and the other end of the second digital-to-analog converter is connected with the current power amplifier and is used for converting the current digital quantity received from the control module into a current analog quantity and outputting the current analog quantity to the current power amplifier.
In a further arrangement of the present utility model, the power amplifier module further includes: a third digital-to-analog converter and an operational amplifier;
one end of the third digital-to-analog converter is connected with the control module through an LVDS differential bus, and the other end of the third digital-to-analog converter is connected with the operational amplifier and is used for converting the small signal digital quantity received from the control module into a small signal analog quantity and outputting the small signal analog quantity to the operational amplifier.
The utility model further provides a relay protection testing device, which further comprises: an industrial personal computer; the industrial personal computer is arranged inside the shell and connected with the control module through an Ethernet cable, the industrial personal computer is used for sending a control instruction to the control module,
the industrial personal computer is also used for monitoring the test process of the relay protection test device, controlling the output of the voltage analog power amplifier, the current analog power amplifier and the low-level small signal, and receiving and storing test data.
The utility model further provides a relay protection testing device, which further comprises: a power module;
the power module is arranged inside the shell and is respectively connected with the control module, the industrial personal computer and the power amplifier module, and the power module is used for providing working voltage and output power for the relay protection testing device.
The utility model further provides a relay protection testing device, which further comprises: an LED display screen; the LED display screen is arranged on the front surface of the shell, is connected with the industrial personal computer and is used for displaying a testing scheme, testing data and flow progress of a testing process.
The utility model further provides a relay protection testing device, which further comprises: a GPS module; the GPS module is arranged on the circuit board, one end of the GPS module is connected with the control module, and the other end of the GPS module is connected with a GPS antenna and used for receiving GPS signals for the relay protection testing device.
The utility model further provides a relay protection testing device, which further comprises: a key; the key is arranged on the shell and connected with the industrial personal computer, and a user sets a test scheme of the relay protection test device through the key.
The utility model provides a relay protection testing device which is connected with an upper computer and comprises a circuit board and a shell; the circuit board includes: the device comprises a switching value module, a control module, a power amplifier module and an optical fiber serial port module; the circuit board is connected with the inner wall of the shell; the switching value module is connected with the control module and is used for collecting and inputting switching value signals to the control module and receiving switching value signals controlled and output by the control module; the optical fiber serial port module is connected with the control module; the optical fiber serial port module is used for receiving optical signals output by the upper computer and outputting the optical signals to the control module, and the optical fiber serial port module is also used for receiving optical digital signals output by the control module; the control module is respectively connected with the switching value module, the power amplification module and the optical fiber serial port module, and is used for receiving switching value signals acquired and input by the switching value module, controlling and outputting corresponding switching value signals to the switching value module, outputting corresponding voltage digital values, current digital values and small signal digital values to the power amplification module according to the switching value signals, and outputting optical digital signals to the optical fiber serial port module; the power amplification module is connected with the control module and is used for outputting a voltage analog quantity power amplifier, a current analog quantity power amplifier and a low-level small signal according to the voltage digital quantity, the current digital quantity and the small-signal digital quantity.
The utility model collects the input switching value signals and outputs voltage digital quantity, current digital quantity and small signal digital quantity to the power amplification module respectively through the control module, and the voltage analog quantity power amplifier, the current analog quantity power amplifier and the low-level small signal are output after the processing of the power amplification module. In addition, the control module outputs a corresponding optical digital signal by receiving the optical signal input by the optical fiber serial port module. The utility model has the dual functions of analog output and digital output, and realizes the effect of simultaneously outputting voltage/current analog power amplifier, low-level small signal and optical digital signal.
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 in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained from the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the internal structure of a relay protection testing device according to the present utility model.
Fig. 2 is a schematic structural diagram of a power amplifier module of the relay protection testing device in the present utility model.
Fig. 3 is a schematic diagram of the overall structure of the relay protection testing device in the present utility model.
The marks in the drawings are as follows: 100. a circuit board; 110. a switching value module; 120. a control module; 130. a power amplifier module; 131. a first digital-to-analog converter; 132. a second digital-to-analog converter; 133. a third digital-to-analog converter; 134. a voltage power amplifier; 135. a current power amplifier; 136. an operational amplifier; 140. an optical fiber serial port module; 200. a housing; 210. an LED display screen; 220. a key; 230. an interface panel; 300. an industrial personal computer; 400. and a power supply module.
Detailed Description
The utility model provides a relay protection testing device, which is used for making the purposes, technical schemes and effects of the relay protection testing device clearer and more definite, and the relay protection testing device is further described in detail below by referring to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description and claims, unless the context specifically defines the terms "a," "an," "the," and "the" include plural referents. If there is a description of "first", "second", etc. in an embodiment of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The inventor researches and discovers that the traditional relay protection testing device does not have the function of simultaneously outputting analog quantity and optical digital quantity due to the architecture limitation of system design, so that the increasingly complex working condition of the intelligent substation cannot be met.
Aiming at the technical problems, the utility model provides a relay protection testing device which is connected with an upper computer and comprises a circuit board and a shell, wherein the circuit board comprises: the switching value module, the control module, the power amplifier module and the optical fiber serial port module, and the circuit board is connected with the inner wall of the shell. The control module collects input switching value signals and outputs voltage digital quantity, current digital quantity and small signal digital quantity to the power amplification module respectively, and the voltage analog quantity power amplification, the current analog quantity power amplification and the low-level small signal are output after the voltage analog quantity power amplification, the current analog quantity power amplification and the small signal are processed by the power amplification module. On the other hand, the optical signal input by the optical fiber serial port module is received through the control module, decoded and converted into an optical digital signal conforming to the IEC61850 protocol, and output to the optical fiber serial port module.
Referring to fig. 1 to 3, the present utility model provides a preferred embodiment of a relay protection testing device.
As shown in fig. 1 and fig. 2, the relay protection testing device provided by the utility model is connected with an upper computer and comprises a circuit board 100 and a shell 200, wherein the circuit board 100 is connected with the inner wall of the shell 200. Wherein the circuit board 100 comprises: the switching value module 110 is connected with the control module 120, and is used for collecting and inputting a switching value signal to the control module 120 and receiving a switching signal controlled by the control module 120 to be output. The optical fiber serial port module 140 is connected with the control module 120; the optical fiber serial port module 140 is configured to receive an optical signal output by the host computer and output the optical signal to the control module 120, and further configured to receive the optical digital signal output by the control module 120, where the control module 120 is respectively connected to the switching value module 110, the power amplifier module 130, and the optical fiber serial port module 140, and is configured to receive the switching value signal acquired and input by the switching value module 110, and control and output a corresponding switching value signal to the switching value module 110, and further configured to output a corresponding voltage digital value, a current digital value, and a small signal digital value to the power amplifier module 130 according to the switching value signal, and further configured to receive the optical signal input by the optical fiber serial port module 140, decode and convert the optical digital signal to output the optical digital signal to the optical fiber serial port module 140, and the power amplifier module 130 is connected to the control module 120, and is configured to output a voltage analog power amplifier, a current analog power amplifier, and a low level small signal according to the voltage digital value, the current digital value, and the small signal digital value.
Specifically, the control module 120 includes an FPGA unit, where the FPGA unit is connected to the optical fiber serial port module 140, and is configured to receive an optical signal output by the optical fiber serial port module 140, decode and convert the optical signal into an optical digital signal according with IEC61850 protocol, and output the optical digital signal to the optical fiber serial port module 140. The FPGA unit is in bidirectional communication with the optical fiber serial port module 140, and is responsible for protocol processing, format conversion, and the like.
In this way, the control module 120 outputs the voltage digital quantity, the current digital quantity and the small signal digital quantity to the power amplification module 130 according to the collected and input switching value signals respectively, and the voltage analog quantity power amplification, the current analog quantity power amplification and the low-level small signal are output after being processed by the power amplification module 130. On the other hand, the control module 120 receives the optical signal input by the optical fiber serial port module 140, decodes and converts the optical signal into an optical digital signal conforming to the IEC61850 protocol, and outputs the optical digital signal to the optical fiber serial port module 140, so that the optical fiber serial port module 140 has the dual functions of analog output and digital output, and achieves the effect of simultaneously outputting a voltage/current analog power amplifier, a low-level small signal and an optical digital signal. In addition, the utility model adopts a multi-core SOC design, and three cores respectively perform data simulation, business flow and computer communication, so that the complicated communication process of exchanging data by adopting a data bus in the prior art is avoided, the system is highly integrated, and the technical bottleneck of simultaneous output of analog quantity power amplifier, low-level small signals and IEC61850 optical digital signals is broken through.
With continued reference to fig. 2, the upper computer may be an intelligent substation, or may be a measurement and control device, an intelligent terminal, a merging unit, and a station control system, which is not limited herein. Therefore, the relay protection testing device in the embodiment has the function of simulating various power faults, and the detection and debugging requirements of the intelligent transformer substation and other power devices are completely met. The switching value module 110 is a device for collecting, inputting and controlling output of a switching value signal, typically a digital value I/O module, and the switching value module 110 is connected to the control module 120 through an LVDS differential bus, collects and outputs the switching value signal to the control module 120, and receives the signal of the control module 120 to control the output of the switching value signal.
In this embodiment, the optical fiber serial port module 140 is an SMV interface and an FT3 interface, where the SMV interface is a dual-mode optical fiber ethernet interface, and the FT3 interface is a single-mode optical fiber serial port. In addition, the control module 120 is composed of Zynq-7000 devices equipped with dual-core ARM Cortex-A9 processors integrated with 28nm Artix-7 or Kintex-7 based programmable logic to achieve excellent performance power consumption ratios and maximum design flexibility.
Referring to fig. 3, in a further implementation manner of an embodiment, the power amplifier module 130 is connected to the control module 120 through an LVDS bus, and is configured to output a corresponding voltage analog power amplifier, a corresponding current analog power amplifier, and a corresponding low-level small signal according to a voltage digital quantity, a current digital quantity, and a small-signal digital quantity.
Further, the power amplifier module 130 includes a first digital-to-analog converter 131 and a voltage power amplifier 134. One end of the first digital-to-analog converter 131 is connected with the control module 120 through an LVDS differential bus, and the other end is connected with the voltage power amplifier 134, and is used for converting the voltage digital quantity received from the control module 120 into a corresponding voltage analog quantity, and outputting the voltage analog quantity to the voltage power amplifier 134; the voltage power amplifier 134 is connected to the first digital-to-analog converter 131 and the voltage analog output interface, and is configured to amplify the voltage analog quantity into the voltage analog quantity power amplifier, and output the voltage analog quantity power amplifier to the voltage analog output interface.
Further, the power amplifier module 130 further includes a second digital-to-analog converter 132 and a current power amplifier 135, where one end of the second digital-to-analog converter 132 is connected to the control module 120 through an LVDS differential bus, and the other end of the second digital-to-analog converter 132 is connected to the current power amplifier 135, and is configured to receive the current digital quantity output by the control module 120, convert the current digital quantity into a corresponding current analog quantity, and output the current analog quantity to the current power amplifier 135, and the current power amplifier 135 is respectively connected to the second digital-to-analog converter 132 and the current analog output interface, and is configured to amplify the current analog quantity into the current analog quantity power amplifier, and output the current analog quantity to the current analog output interface.
Further, the power amplifier module 130 further includes a third digital-to-analog converter 133 and an operational amplifier 136, one end of the third digital-to-analog converter 133 is connected to the control module 120 through an LVDS differential bus, and the other end is connected to the operational amplifier 136, for receiving the small signal digital quantity output by the control module 120, converting the small signal digital quantity into a corresponding small signal analog quantity, and outputting the small signal analog quantity to the operational amplifier 136, and the operational amplifier 136 is respectively connected to the third digital-to-analog converter 133 and the low-level small signal interface, and is used for converting the small signal analog quantity into a low-level small signal and outputting the low-level small signal to the low-level small signal interface.
In this embodiment, the DAC digital-analog converter is integrated on the voltage amplifier 134, the current power amplifier 135 and the high-precision operational amplifier 136, so that the analog digital quantity (voltage digital quantity, current digital quantity and small signal digital quantity) output by the control module 120 is converted into the corresponding analog quantity (voltage analog quantity, current analog quantity and small signal analog quantity) by the DAC digital-analog converter, and finally the voltage/current analog quantity power amplifier and the low-level small signal are obtained by amplifying the voltage amplifier 134, the current power amplifier 135 and the high-precision operational amplifier 136.
With continued reference to fig. 2, the relay protection testing apparatus further includes a power module 400, where the power module 400 is disposed inside the housing 200 and is connected to the control module 120, the industrial personal computer 300, and the power amplifier module 130, respectively. The power supply module 400 in this embodiment adopts a high-efficiency and low-ripple switching power supply, the comprehensive efficiency of the power supply is up to 87%, the output voltage and the output power of the switching power supply are developed and designed according to the requirement of the relay protection testing device, electromagnetic compatibility and ventilation and heat dissipation of the device are comprehensively considered between the structure of the switching power supply and each module, and compared with the industrial application switching power supply of a finished product, the power supply module has the characteristics of more reasonable structure and higher performance matching degree, and provides necessary conditions for reducing the volume and the weight of the relay protection testing device. In other embodiments, the relay protection testing device further includes: and the auxiliary direct current power supply can output direct current voltage of +12V.
Further, the relay protection testing device further includes: the industrial personal computer 300 is arranged inside the shell 200, the industrial personal computer 300 is connected with the control module 120 through an Ethernet cable, and the industrial personal computer 300 is used for sending out control instructions to the control module 120 according to a test scheme set by a user, and is also used for monitoring a test process of the test device, controlling output of the test device, receiving and storing test data. In addition, the industrial personal computer 300 has a USB interface, and can be externally connected with other operation devices (such as a mouse, an external keyboard, and a USB disk).
Further, the relay protection testing device further includes: and a GPS module (not labeled in the figure), which is disposed on the circuit board 100, and has one end connected to the control module 120 and the other end connected to a GPS antenna, and is configured to receive GPS signals, convert the GPS signals into serial data, decode the serial data in an internal FPGA, extract time information, and adjust a local clock. In addition, in this embodiment, synchronization may be performed by using a B-code interface, where an optical B-code input/output interface uses optical fiber transmission, and an electrical B-code input/output interface uses cable transmission.
As shown in fig. 1, the relay protection testing device further includes: the LED display screen 210 is disposed on the housing 200 and connected to the industrial personal computer 300, and is used for displaying a test scheme, input/output test data and a process progress of the device test process.
Further, the relay protection testing device further includes: the key 220 is disposed on the housing 200 and connected to the industrial personal computer 300, and a user sets a test scheme of the relay protection test device through the key 220.
Further, the relay protection testing device further includes: the interface panel 230 is disposed on the housing 200, and the interface panel 230 is connected to the switching value module 110, the control module 120, the power amplifier module 130, the optical fiber serial port module 140, the industrial personal computer 300 and the power module 400, respectively, to provide an interface between the modules.
In summary, the relay protection testing device provided by the utility model is connected with an upper computer, and comprises a circuit board and a shell, wherein the circuit board comprises: the device comprises a switching value module, a control module, a power amplifier module and an optical fiber serial port module; the circuit board is connected with the inner wall of the shell. The switching value module is connected with the control module and is used for collecting and inputting switching value signals to the control module and receiving switching value signals controlled and output by the control module; the optical fiber serial port module is connected with the control module; the optical fiber serial port module is connected with the control module; the optical fiber serial port module is used for receiving optical signals output by the upper computer and outputting the optical signals to the control module, and the optical fiber serial port module is also used for receiving optical digital signals output by the control module; the control module is respectively connected with the switching value module, the power amplification module and the optical fiber serial port module, and is used for receiving switching value signals acquired and input by the switching value module, controlling and outputting corresponding switching value signals to the switching value module, outputting corresponding voltage digital values, current digital values and small signal digital values to the power amplification module according to the switching value signals, and outputting optical digital signals to the optical fiber serial port module; the power amplification module is connected with the control module and is used for outputting a voltage analog quantity power amplifier, a current analog quantity power amplifier and a low-level small signal according to the voltage digital quantity, the current digital quantity and the small-signal digital quantity.
According to the utility model, the control module respectively outputs voltage digital quantity, current digital quantity and small signal digital quantity to the power amplification module according to the acquired and input switching value signals, and the voltage analog quantity power amplification, the current analog quantity power amplification and the low-level small signal are output after being processed by the power amplification module. In addition, the control module receives the optical signal input by the optical fiber serial port module and outputs a corresponding optical digital signal. The utility model has the dual functions of analog output and digital output, and realizes the effect of simultaneously outputting voltage/current analog power amplifier, low-level small signal and optical digital signal.
It is to be understood that the utility model is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (10)
1. The relay protection testing device is connected with an upper computer and is characterized by comprising a circuit board and a shell; the circuit board comprises a switching value module, a control module, a power amplifier module and an optical fiber serial port module; the circuit board is connected with the inner wall of the shell;
the switching value module is connected with the control module and is used for collecting and inputting switching value signals to the control module and receiving switching value signals controlled and output by the control module;
the optical fiber serial port module is connected with the control module; the optical fiber serial port module is used for receiving optical signals output by the upper computer and outputting the optical signals to the control module, and the optical fiber serial port module is also used for receiving optical digital signals output by the control module;
the control module is respectively connected with the switching value module, the power amplification module and the optical fiber serial port module, and is used for receiving switching value signals acquired and input by the switching value module, controlling and outputting corresponding switching value signals to the switching value module, outputting corresponding voltage digital values, current digital values and small signal digital values to the power amplification module according to the switching value signals, and outputting the optical digital signals to the optical fiber serial port module;
the power amplification module is connected with the control module and is used for outputting a voltage analog quantity power amplifier, a current analog quantity power amplifier and a low-level small signal according to the voltage digital quantity, the current digital quantity and the small-signal digital quantity.
2. The relay protection testing device of claim 1, wherein the control module further comprises: an FPGA unit;
the FPGA unit is connected with the optical fiber serial port module, and is used for receiving the optical signals output by the optical fiber serial port module, decoding and converting the optical signals into digital signals and outputting the digital signals to the optical fiber serial port module.
3. The relay protection testing device of claim 1, wherein the power amplifier module comprises: a first digital-to-analog converter and a voltage power amplifier;
one end of the first digital-to-analog converter is connected with the control module through an LVDS differential bus, and the other end of the first digital-to-analog converter is connected with the voltage power amplifier and is used for converting the voltage digital quantity output by the control module into a voltage analog quantity and outputting the voltage analog quantity to the voltage power amplifier.
4. The relay protection testing device of claim 3, wherein the power amplifier module further comprises: a second digital-to-analog converter and a current power amplifier;
one end of the second digital-to-analog converter is connected with the control module through an LVDS differential bus, and the other end of the second digital-to-analog converter is connected with the current power amplifier and is used for converting the current digital quantity received from the control module into a current analog quantity and outputting the current analog quantity to the current power amplifier.
5. The relay protection testing device of claim 4, wherein the power amplifier module further comprises: a third digital-to-analog converter and an operational amplifier;
one end of the third digital-to-analog converter is connected with the control module through an LVDS differential bus, and the other end of the third digital-to-analog converter is connected with the operational amplifier and is used for converting the small signal digital quantity received from the control module into a small signal analog quantity and outputting the small signal analog quantity to the operational amplifier.
6. The relay protection testing device of claim 1, further comprising: an industrial personal computer; the industrial personal computer is arranged inside the shell and connected with the control module through an Ethernet cable, and is used for sending a control instruction to the control module;
the industrial personal computer is also used for monitoring the test process of the relay protection test device, controlling the output of the voltage analog power amplifier, the current analog power amplifier and the low-level small signal, and receiving and storing test data.
7. The relay protection testing device of claim 1, further comprising: a power module; the power supply module is used for providing working voltage and output power for the relay protection testing device.
8. The relay protection testing device of claim 6, further comprising: an LED display screen; the LED display screen is arranged on the front surface of the shell, is connected with the industrial personal computer and is used for displaying a testing scheme, testing data and flow progress of a testing process.
9. The relay protection testing device of claim 1, further comprising: a GPS module; the GPS module is arranged on the circuit board, one end of the GPS module is connected with the control module, and the other end of the GPS module is connected with a GPS antenna and used for receiving GPS signals for the relay protection testing device.
10. The relay protection testing device of claim 6, further comprising: a key; the key is arranged on the shell and connected with the industrial personal computer, and a user sets a test scheme of the relay protection test device through the key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320623107.6U CN219831268U (en) | 2023-03-21 | 2023-03-21 | Relay protection testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320623107.6U CN219831268U (en) | 2023-03-21 | 2023-03-21 | Relay protection testing device |
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| CN219831268U true CN219831268U (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320623107.6U Active CN219831268U (en) | 2023-03-21 | 2023-03-21 | Relay protection testing device |
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| CN (1) | CN219831268U (en) |
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2023
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