A portable phase detection adjustment device

Abstract

This application discloses a portable phase detection and adjustment device, relating to the field of electronic measurement technology. The system includes: a portable carrying case with multiple low-voltage measuring heads; a rectifier cabinet with R-phase lines, S-phase lines, and T-phase lines; an oscilloscope with a first oscilloscope channel, a second oscilloscope channel, a third oscilloscope channel, and a fourth oscilloscope channel, wherein the first and second oscilloscope channels are connected to different low-voltage measuring heads, the third oscilloscope channel is connected to the R-phase lines, S-phase lines, and T-phase lines of the rectifier cabinet, and the fourth oscilloscope channel is connected to the R-phase lines, S-phase lines, and T-phase lines of the rectifier cabinet; and a control board with a first comparator, a second comparator, and a processor, wherein the input terminals of the first comparator are connected to the first and third oscilloscope channels respectively; the input terminals of the second comparator are connected to the second and fourth oscilloscope channels respectively; and the processor is connected to the output terminals of the first and second comparators respectively.

Description

Technical Field

[0001] This application relates to the field of electronic measurement technology, and in particular to a portable phase detection and adjustment device. Background Technology

[0002] Currently, the main motor and coiler of the 1700 pickling and rolling mill are driven by Hitachi Daimoto. The transmission system adopts Hitachi's MH series main drive, including a high-voltage transformer, rectifier cabinet, inverter cabinet, control cabinet, switch cabinet, and cooling unit. The phase angle of the voltage waveform of the synchronous transformer in the rectifier cabinet and the phase angle of the input voltage waveform of the rectifier cabinet must be consistent in order to correctly control the pulse trigger and ensure the normal operation of the transmission system.

[0003] However, the 1700 pickling and rolling production line has been operating for 16 years. With the aging of the equipment, the failure rate of the high-voltage transformers has gradually increased. During annual maintenance, the high-voltage transformers are gradually removed for repair and replacement. When a transformer is replaced or reinstalled after maintenance, the phase angle may change. If the phase of the transformer output voltage is inconsistent with the phase of the synchronous transformer voltage waveform, the drive system will not operate normally. When replacing the high-voltage transformer or reinstalling it after maintenance, it is necessary to detect, compare, and adjust the phase of the transformer output voltage and the synchronous transformer voltage waveform to ensure phase consistency. During phase detection, the rectifier cabinet input voltage is 1900V, with a maximum voltage reaching 2687V. Ordinary oscilloscopes cannot directly measure this voltage and cannot compare it with the synchronous transformer voltage waveform. Therefore, it is necessary to propose a portable phase detection and adjustment device to at least solve some of the above problems. Utility Model Content

[0004] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] In a first aspect, embodiments of this application provide a portable phase detection adjustment device, the device comprising:

[0006] Portable carrying case with multiple low-pressure measuring heads;

[0007] The rectifier cabinet has R-phase line, S-phase line and T-phase line;

[0008] An oscilloscope has a first oscilloscope channel, a second oscilloscope channel, a third oscilloscope channel, and a fourth oscilloscope channel. The first oscilloscope channel and the second oscilloscope channel are each connected to a different low-voltage measuring head. The third oscilloscope channel is connected to the R-phase line, S-phase line, and T-phase line of the rectifier cabinet. The fourth oscilloscope channel is also connected to the R-phase line, S-phase line, and T-phase line of the rectifier cabinet.

[0009] The control board has a first comparator, a second comparator, and a processor. The input terminals of the first comparator are connected to the first oscilloscope channel and the third oscilloscope channel, respectively. The input terminals of the second comparator are connected to the second oscilloscope channel and the fourth oscilloscope channel, respectively. The processor is connected to the output terminals of the first comparator and the second comparator, respectively. The processor is used to process the comparison results of the first comparator and the second comparator.

[0010] In one embodiment of this utility model, the portable suitcase includes:

[0011] The cable plug is connected to the R-phase, S-phase, and T-phase lines of the rectifier cabinet;

[0012] A voltage transformer, one end of which is connected to the cable plug, is used to convert high voltage to low voltage;

[0013] The low-voltage measuring head is connected on one side to the other end of the voltage transformer, and on the other side to the first and second oscilloscope channels of the oscilloscope.

[0014] In one embodiment of this utility model, the portable suitcase further includes:

[0015] A high-voltage fuse, one end of which is connected to the cable plug and the other end of which is connected to the voltage transformer, blows when the current in the rectifier cabinet exceeds a preset current value.

[0016] An auxiliary contact is provided, with one end connected to the rectifier cabinet and the other end connected to the high-voltage fuse. The auxiliary contact is used to disconnect the connection between the auxiliary contact and the rectifier cabinet in the event that the high-voltage fuse blows.

[0017] In one embodiment of this utility model, it further includes:

[0018] An insulating clamp is provided, and the R-phase line, S-phase line, and T-phase line of the rectifier cabinet are all connected to one end of the insulating clamp.

[0019] The high-voltage cable has one end connected to the other end of the insulating clamp and the other end connected to the cable plug.

[0020] In one embodiment of this utility model, the portable suitcase further includes:

[0021] A voltmeter is located on the top of the portable carrying case to display the measured voltage.

[0022] In one embodiment of this utility model, the display voltmeter further includes:

[0023] An incoming line voltmeter is located on the top of the portable carrying case and is used to display the incoming line voltage of the portable carrying case.

[0024] A line voltage meter is located on the top of the portable suitcase to display the measured line voltage of the portable suitcase.

[0025] In one embodiment of this utility model, the voltage transformer further includes: a first interface, a second interface, a third interface, a fourth interface, a fifth interface, and a sixth interface;

[0026] The first interface, the second interface, and the third interface are all connected to the cable plug;

[0027] Both the fourth and fifth interfaces are connected to the first oscilloscope channel via the low-voltage measuring head.

[0028] Both the fifth and sixth interfaces are connected to the second oscilloscope channel via the low-voltage measuring head.

[0029] In one embodiment of this utility model, it further includes:

[0030] The third oscilloscope channel is connected to the R-phase line and S-phase line of the rectifier cabinet;

[0031] The fourth oscilloscope channel is connected to the S-phase line and T-phase line of the rectifier cabinet.

[0032] In one embodiment of this utility model, the rectifier cabinet further includes:

[0033] The DC busbar has a positive and a negative terminal.

[0034] In one embodiment of this utility model, it further includes:

[0035] A DC power supply has a positive terminal and a negative terminal, wherein the positive terminal is connected to the positive terminal of the DC busbar and the negative terminal is connected to the negative terminal of the DC busbar.

[0036] In summary, the portable phase detection and adjustment device of this application embodiment connects the first and second oscilloscope channels to different low-voltage measuring heads, the third oscilloscope channel to the R-phase, S-phase, and T-phase lines of the rectifier cabinet, and the fourth oscilloscope channel to the R-phase, S-phase, and T-phase lines of the rectifier cabinet. It also includes a first comparator, a second comparator, and a processor. The input terminals of the first comparator are connected to the first and third oscilloscope channels respectively; the input terminals of the second comparator are connected to the second and fourth oscilloscope channels respectively; and the processor is connected to the output terminals of the first and second comparators respectively. The processor processes the comparison results of the first and second comparators. The input terminals of the first comparator are connected to the first and third oscilloscope channels, respectively, and the input terminals of the second comparator are connected to the second and fourth oscilloscope channels, respectively. Since the first and second comparators are connected to different channels of the oscilloscopes, they can synchronously compare the detected waveform with the output waveform of the rectifier cabinet. Since the processor is connected to the output terminals of the first and second comparators, it can process the comparison results of the first and second comparators to adjust the phase, thus solving the problem that ordinary oscilloscopes in the prior art cannot perform direct measurements and cannot compare with the voltage waveform of the synchronous transformer.

[0037] The portable phase detection adjustment device proposed in this application, along with other advantages, objectives, and features of this application, will be partly apparent from the following description and partly understood by those skilled in the art through study and practice of this application. Attached Figure Description

[0038] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit this specification. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0039] Figure 1 This is a schematic diagram of a portable phase detection adjustment device provided in an embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the structure of the control board in a portable phase detection adjustment device provided in an embodiment of this application;

[0041] Figure 3 This is a schematic diagram of the structure of a portable carrying case in a portable phase detection adjustment device provided in an embodiment of this application.

[0042] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0043] 10 Portable carrying case; 101 Low-voltage measuring head; 102 Cable plug; 103 Voltage transformer; 104 High-voltage fuse; 105 Auxiliary contact; 11 Rectifier cabinet; 111 DC busbar; 112 DC power supply; 12 Oscilloscope; 13 Control board; 131 First comparator; 132 Second comparator; 133 Processor; 14 Insulating clamp; 15 High-voltage cable; 16 Display voltmeter; 161 Incoming voltmeter; 162 Outgoing voltmeter. Detailed Implementation

[0044] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0045] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0046] Figure 1 This is a schematic diagram of a portable phase detection adjustment device provided in an embodiment of this application. Please refer to... Figure 1The system may include: a portable carrying case 10 with multiple low-voltage measuring heads 101; a rectifier cabinet 11 with R-phase, S-phase, and T-phase lines; and an oscilloscope 12 with a first, second, third, and fourth oscilloscope channel. The first and second oscilloscope channels are connected to different low-voltage measuring heads 101; the third oscilloscope channel is connected to the R-phase, S-phase, and T-phase lines of the rectifier cabinet; and the fourth oscilloscope channel is also connected to the R-phase, S-phase, and T-phase lines of the rectifier cabinet. The control board 13 includes a first comparator 131, a second comparator 132, and a processor 133. The input terminals of the first comparator 131 are connected to the first oscilloscope channel and the third oscilloscope channel, respectively. The input terminals of the second comparator 132 are connected to the second oscilloscope channel and the fourth oscilloscope channel, respectively. The processor 133 is connected to the output terminals of the first comparator 131 and the second comparator 132, respectively. The processor 133 is used to process the comparison results of the first comparator 131 and the second comparator 132. The first comparator 131 and the second comparator 132 are waveform comparators used to compare waveforms.

[0047] The portable phase detection and adjustment device provided in this embodiment includes a portable carrying case 10, a rectifier cabinet 11, an oscilloscope 12, and a control board 13. The portable carrying case 10 can be used to acquire high-voltage signals and convert them into low-voltage signals for transmission. It has multiple low-voltage measuring heads 101, which can be used to acquire low-voltage electrical signals in electrical systems. These heads are mounted on the portable carrying case 10 for convenient use in different situations, and can be flexibly connected to the low-voltage circuit parts that need to be measured, acquiring relevant electrical signals and providing data sources for subsequent analysis. The input terminals of the first comparator 131 are connected to the first oscilloscope channel A1 and the third oscilloscope channel A3, respectively, and the input terminals of the second comparator 132 are connected to the second oscilloscope channel A2 and the third oscilloscope channel A4, respectively. Since the first comparator 131 and the second comparator 132 are connected to different channels of the oscilloscope 12, the first comparator 131 and the second comparator 132 can synchronously compare the detected waveform with the output waveform of the rectifier cabinet 11. Since the processor 133 is connected to the output terminals of the first comparator 131 and the second comparator 132, the processor 133 can process the comparison results of the first comparator 131 and the second comparator 132 to adjust the phase, thus solving the problem that ordinary oscilloscopes in the prior art cannot perform direct measurement and cannot compare with the voltage waveform of the synchronous transformer.

[0048] Rectifier cabinet 11 is used to convert alternating current (AC) to direct current (DC). It has an R-phase line, an S-phase line, and a T-phase line, which are different phases of the three-phase AC power supply. The AC signals carried by these phase lines have a specific phase relationship. Signal data from the AC side are provided for subsequent phase difference analysis by connecting to the third and fourth oscilloscope channels of oscilloscope 12.

[0049] The oscilloscope 12 is used to display electrical signal waveforms and has a first, second, third, and fourth oscilloscope channel. The first and second oscilloscope channels are both connected to the low-voltage measuring head 101 on the portable carrying case 10, receiving the low-voltage electrical signals acquired by the measuring head 101 and displaying these low-voltage electrical signals in waveform form. These waveforms contain various characteristic information of the low-voltage signals, such as frequency, amplitude, and phase. The third and fourth oscilloscope channels are both connected to the R-phase, S-phase, and T-phase lines of the rectifier cabinet 11 to acquire the three-phase AC signal waveforms from the rectifier cabinet 11. Similarly, these three-phase AC signal waveforms also carry various characteristic information of the AC signals, such as frequency, amplitude, and phase.

[0050] Figure 2 This is a schematic diagram of the control board in a portable phase detection adjustment device provided in an embodiment of this application. Please refer to... Figure 2 The control board 13 is used to analyze and process the waveforms acquired by the oscilloscope 12 to determine the phase adjustment parameters. The input terminals of the first comparator 131 are connected to the first and third oscilloscope channels, respectively, and the input terminals of the second comparator 132 are connected to the second and fourth oscilloscope channels, respectively. Since the first and second comparators 131 and 132 are connected to different channels of the oscilloscope 12, they can synchronously compare the detected waveforms with the output waveforms of the rectifier cabinet 11. Since the processor 133 is connected to the output terminals of the first and second comparators 131, it can process the comparison results of the first and second comparators 131 to adjust the phase. Therefore, the control board 13 compares the low-voltage signal waveform displayed on the first oscilloscope channel with the AC signal waveform from the rectifier cabinet 11 displayed on the third oscilloscope channel. The relative positions of the two waveforms on the time axis are analyzed to determine their phase difference, i.e., the first phase difference. The low-voltage signal waveform from the second oscilloscope channel and the AC signal waveform from the rectifier cabinet 11 from the fourth oscilloscope channel are then compared to obtain the second phase difference. Based on the obtained first and second phase differences, the control board 13 comprehensively analyzes the data from these two phase differences to ultimately determine the phase adjustment parameter. This phase adjustment parameter can be used to ensure the stable operation of the power system, improve power quality, and optimize the working efficiency of electrical equipment.

[0051] In summary, the portable phase detection and adjustment device proposed in this application connects the first and second oscilloscope channels to the low-voltage measuring head 101, and the third and fourth oscilloscope channels to the R-phase, S-phase, and T-phase lines of the rectifier cabinet 11. The control board 13 compares the waveforms of the first and third oscilloscope channels to obtain a first phase difference, and compares the waveforms of the second and fourth oscilloscope channels to obtain a second phase difference. Phase adjustment parameters are then determined based on the first and second phase differences. This allows for direct voltage measurement and comparison of the detected waveform with the output waveform of the rectifier cabinet 11 to adjust the phase.

[0052] Furthermore, due to a previous lack of testing equipment, phase testing of the incoming line to rectifier cabinet 11 could not be completed, preventing the commissioning of rectifier cabinet 11. This work required the Japanese side to perform. This portable phase detection and adjustment device allows for independent confirmation of the rectified phase. Moreover, using this portable phase detection and adjustment device for phase detection enables timely detection of phase deviations, and timely adjustments can prevent damage to the power units of rectifier cabinet 11. Since each phase has three power units, and each power unit costs 700,000 yuan, this portable phase detection and adjustment device can reduce equipment losses by 2.1 million yuan. This portable phase detection and adjustment device has a simple structure, is easy to carry and use, provides effective and accurate measurements, and effectively protects equipment and personal safety, playing a crucial role in the maintenance and commissioning of rectifier equipment.

[0053] Figure 3 Please refer to the structural schematic diagram of the portable carrying case in a portable phase detection adjustment device provided in this application embodiment. Figure 3 In some examples, the portable carrying case 10 includes: a cable plug 102 connected to the R-phase, S-phase, and T-phase lines of the rectifier cabinet 11; one end of a voltage transformer 103 connected to the cable plug 102 for converting high voltage to low voltage; one side of a low-voltage measuring head 101 connected to the other end of the voltage transformer 103; and the other side of the low-voltage measuring head 101 connected to the first and second oscilloscope channels of the oscilloscope 12.

[0054] In this technical solution, the cable plug 102 is used to connect the portable carrying case 10 and the rectifier cabinet 11, and is specifically designed to connect to the R-phase, S-phase, and T-phase lines of the rectifier cabinet 11. This connection method enables the portable carrying case 10 to acquire electrical signals from the three-phase AC power supply of the rectifier cabinet 11, providing a raw signal source for subsequent measurement and analysis.

[0055] One end of the voltage transformer 103 is connected to the cable plug 102, and the other end is connected to the low-voltage measuring head 101, acting as a bridge between the cable plug 102 and the low-voltage measuring head 101. The main function of the voltage transformer 103 is to convert high voltage to low voltage. The R-phase, S-phase, and T-phase lines of the rectifier cabinet transmit relatively high voltages. Directly measuring and processing these high voltages poses safety risks, and many measuring devices cannot directly process high-voltage signals. The voltage transformer 103, through the principle of electromagnetic induction, converts the high voltage into a low voltage suitable for processing by the low-voltage measuring head 101 and subsequent equipment at a certain transformation ratio. This ensures the safety of the measurement process and makes the signal suitable for subsequent measurement and analysis equipment.

[0056] One side of the low-voltage measuring head 101 is connected to the other end of the voltage transformer 103 to receive the low-voltage signal converted by the voltage transformer 103; the other side is connected to the first and second oscilloscope channels of the oscilloscope 12 to transmit the acquired low-voltage signal to the oscilloscope 12. The low-voltage measuring head 101 is responsible for acquiring the stepped-down low-voltage signal and accurately transmitting it to the oscilloscope 12 so that the oscilloscope 12 can display the corresponding low-voltage signal waveform. These waveforms contain various information about the low-voltage signal, such as voltage changes, frequency characteristics, and phase characteristics, providing a data basis for the subsequent waveform comparison and phase difference calculation by the control board 13.

[0057] In some examples, the portable carrying case 10 further includes: one end of a high-voltage fuse 104 connected to the cable plug 102, and the other end of the high-voltage fuse 104 connected to the voltage transformer 103, wherein the high-voltage fuse 104 blows when the current in the rectifier cabinet 11 exceeds a preset current value; one end of an auxiliary contact 105 connected to the rectifier cabinet 11, and the other end of the auxiliary contact 105 connected to the high-voltage fuse 104, for disconnecting the incoming voltage of the rectifier cabinet 11 when the high-voltage fuse 104 blows.

[0058] In this technical solution, the portable carrying case 10 also includes a high-voltage fuse 104 and auxiliary contacts 105. One end of the high-voltage fuse 104 is connected to a cable plug 102, which is also connected to the R-phase, S-phase, and T-phase lines of the rectifier cabinet 11. The other end of the high-voltage fuse 104 is connected to a voltage transformer 103. This connection method places it on the path of obtaining electrical signals from the rectifier cabinet 11 and transmitting them to the voltage transformer 103. The main function of the high-voltage fuse 104 is to provide protection when the current exceeds a preset current value. When an abnormal situation occurs in the circuit, causing the current to be too large, that is, exceeding the preset current value of the high-voltage fuse, the fusible element of the high-voltage fuse 104, which is usually a fusible metal wire or sheet, will melt due to overheating. This fuse action cuts off the circuit, preventing excessive current from continuing to flow to the voltage transformer 103 and subsequent equipment, thereby avoiding damage to the voltage transformer 103 and the electrical components inside the entire portable carrying case 10 due to overcurrent, and ensuring the safety of the equipment.

[0059] Auxiliary contact 105 is located on and closely connected to the high-voltage fuse 104. When the high-voltage fuse 104 blows, auxiliary contact 105 triggers a corresponding action to disconnect the incoming voltage of the rectifier cabinet 11. This function further enhances the safety protection mechanism of the entire system. Simply relying on the high-voltage fuse 104 to blow and cut off the local circuit current is insufficient to completely guarantee safety, because in some cases, even if the high-voltage fuse 104 blows, there may still be residual voltage or other potential hazards at the incoming terminal of the rectifier cabinet 11. Auxiliary contact 105, at the instant the high-voltage fuse 104 blows, can quickly and completely disconnect the incoming voltage of the rectifier cabinet 11, eliminating potential safety hazards at the source and preventing injury to equipment and operators due to unexpected voltage fluctuations or residual voltage.

[0060] The high-voltage fuse 104 and the auxiliary contact 105 together constitute a comprehensive overcurrent and electrical safety protection mechanism for the portable carrying case 10. The high-voltage fuse 104 is responsible for cutting off the local circuit in case of overcurrent, while the auxiliary contact 105 further ensures disconnection from the power supply after the high-voltage fuse 104 is activated, thus comprehensively protecting the safety of equipment and personnel.

[0061] In some examples, the portable phase detection adjustment device further includes: the R-phase line, S-phase line and T-phase line of the rectifier cabinet 11 are all connected to one end of the insulating clamp; one end of the high-voltage cable 15 is connected to the other end of the insulating clamp 14, and the other end of the high-voltage cable 15 is connected to the cable plug 102.

[0062] In this technical solution, one end of the insulating clip 14 is connected to the R-phase, S-phase, and T-phase lines of the rectifier cabinet 11. This connection method means that the insulating clip 14 needs to be connected to all three phases simultaneously, enabling stable and reliable acquisition of three-phase electrical signals. While ensuring a good electrical connection, it effectively isolates the human body from high voltage, preventing electric shock to operators during operation and ensuring operational safety. The insulating clip 14 provides basic safety assurance for the entire connection structure, ensuring that the electrical signals drawn from the rectifier cabinet 11 can be safely transmitted during the initial connection stage.

[0063] One end of the high-voltage cable 15 is connected to the other end of the insulating clamp 14, and the other end is connected to the cable plug 102 in the portable carrying case 10. This establishes an electrical connection channel between the insulating clamp 14 and the cable plug 102, allowing the three-phase electrical signals obtained from the rectifier cabinet 11 through the insulating clamp 14 to be smoothly transmitted into the portable carrying case 10. The high-voltage cable 15 has the ability to withstand high voltage, enabling safe transmission of high-voltage signals from the rectifier cabinet 11 while ensuring the stability and integrity of the signal transmission process. This ensures that subsequent equipment, such as the voltage transformer 103, can receive accurate electrical signals, providing a reliable signal source for the entire system's measurement and analysis of electrical signals.

[0064] In some examples, the portable suitcase 10 further includes a display voltmeter 16 disposed on the top of the portable suitcase, the display voltmeter 16 being used to display the measured voltage.

[0065] In this technical solution, the display voltmeter 16 is located on the top of the portable carrying case 10. The top is a relatively easy-to-observe position, allowing operators to easily see the display content of the voltmeter 16 without changing their posture or specifically seeking an observation angle when performing related measurements using the portable carrying case 10. This facilitates real-time acquisition of measurement data. The display voltmeter 16 is used to display the measured voltage. In the entire measurement system, the three-phase electrical signal from the rectifier cabinet 11 is obtained through the cable plug 102, the high voltage is converted to low voltage by the voltage transformer 103, and then collected and transmitted by the low-voltage measuring head 101 to the oscilloscope 12. The display voltmeter 16 is responsible for presenting the measured voltage value in an intuitive digital form. This allows operators to quickly determine the measured voltage directly from the display voltmeter 16 without needing complex waveform analysis using the oscilloscope 12, providing great convenience and enabling more efficient understanding of the current measured voltage situation, which helps in timely judgment and decision-making.

[0066] In some examples, the display voltmeter 16 further includes: an input voltmeter 161 disposed on the top of the portable suitcase 10, the input voltmeter 161 being used to display the input measured voltage of the portable suitcase 10; and an output voltmeter 162 disposed on the top of the portable suitcase 10, the output voltmeter 162 being used to display the output measured voltage of the portable suitcase 10.

[0067] In this technical solution, the input voltmeter 161 is mainly used to display the input measurement voltage, which refers to the voltage value entering the internal measurement system of the portable carrying case 10. By monitoring the input measurement voltage, the operator can understand the magnitude of the voltage input to the measuring device and determine whether the input voltage is within the normal range. For example, if the input measurement voltage fluctuates abnormally, it will affect the normal operation of the internal measurement circuit, leading to inaccurate measurement results or equipment damage. Therefore, the input voltmeter 161 provides the operator with direct information about the input signal, helping to promptly identify potential problems and take corresponding measures.

[0068] The output voltmeter 162 displays the voltage value output after processing by the internal measurement system of the portable carrying case 10, i.e., the output measured voltage. This value reflects the measurement system's processing result of the input voltage. By comparing the readings of the input voltmeter 161 and the output voltmeter 162, the operator can understand the measurement system's conversion and processing of the voltage signal, and thus determine whether the measurement system is working properly. For example, if the input voltage is stable, but the output voltage shows abnormal changes, it means that there is a fault inside the measurement system, such as a problem with the signal conversion circuit. The output voltmeter 162 provides an important basis for evaluating the performance and results of the measurement system, helping the operator to fully understand the voltage changes during the measurement process.

[0069] In some examples, the voltage transformer 103 further includes: a first interface, a second interface, a third interface, a fourth interface, a fifth interface, and a sixth interface; wherein the first interface, the second interface, and the third interface are all connected to the cable plug 102; the fourth interface and the fifth interface need to be connected to the first oscilloscope channel through the low-voltage measuring head 101; and the fifth interface and the sixth interface need to be connected to the second oscilloscope channel through the low-voltage measuring head 101.

[0070] In this technical solution, the voltage transformer 103 further includes: a first interface A, a second interface B, a third interface C, a fourth interface a, a fifth interface b, and a sixth interface c; wherein, the first interface A, the second interface B, and the third interface C are all connected to the cable plug 102. The cable plug 102 is responsible for acquiring electrical signals from the outside, such as three-phase electrical signals from the rectifier cabinet 11. The simultaneous connection of these three interfaces to the cable plug 102 means that the voltage transformer 103 can comprehensively receive electrical signals transmitted from the cable plug 102. This multi-interface connection method helps improve the stability and reliability of signal transmission, ensuring that the voltage transformer 103 can accurately acquire complete electrical signals, providing a good foundation for subsequent voltage conversion and measurement work.

[0071] The fourth interface a and the fifth interface b are connected to the first oscilloscope channel via the low-voltage measurement head 101. The voltage transformer 103 converts the high voltage into a low voltage suitable for measurement. The converted low-voltage signal is output from the fourth interface a and the fifth interface b and transmitted to the first oscilloscope channel via the low-voltage measurement head 101. The low-voltage measurement head 101 is responsible for acquiring and transmitting the low-voltage signal, while the first oscilloscope channel is responsible for receiving the signal and performing related measurements and analysis. This connection method enables the oscilloscope 12 to monitor and process specific electrical signals.

[0072] The fifth interface b and the sixth interface c are connected to the second oscilloscope channel via the low-voltage measurement head 101. Similarly, the low-voltage signal, converted by the voltage transformer 103, is output from the fifth interface b and the sixth interface c and transmitted to the second oscilloscope channel by the low-voltage measurement head 101. This connection configuration allows the two different channels of the oscilloscope 12 to simultaneously acquire different combinations of low-voltage signals, enabling a more comprehensive and detailed analysis and comparison of the electrical signals. For example, by acquiring relevant signals from two different channels, parameters such as phase difference and amplitude relationship between the signals can be analyzed, which helps to gain a deeper understanding of the characteristics of the electrical signals and the operating status of related circuits.

[0073] In some examples, the rectifier cabinet's R-phase and S-phase lines are connected to a third oscilloscope channel; and the rectifier cabinet's S-phase and T-phase lines are connected to a fourth oscilloscope channel.

[0074] In this technical solution, the third oscilloscope channel is connected to the R-phase and S-phase lines of the rectifier cabinet 11. This connection means that the third oscilloscope channel can simultaneously acquire electrical signals from the R-phase and S-phase lines of the rectifier cabinet 11. The fourth oscilloscope channel is connected to the S-phase and T-phase lines of the rectifier cabinet 11. This allows the fourth oscilloscope channel to acquire electrical signals from the S-phase and T-phase lines of the rectifier cabinet.

[0075] In some examples, the rectifier cabinet 11 further includes a DC busbar 111 having positive and negative terminals.

[0076] In this technical solution, the DC busbar 111 is an important component of the rectifier cabinet 11, used to collect and distribute DC current. It has two polarity terminals: a positive terminal and a negative terminal. The positive terminal is the high-potential terminal for DC current output, responsible for delivering the rectified DC current to loads or other equipment that require power. The negative terminal is the low-potential terminal for DC current return, forming a DC current loop.

[0077] In some examples, it also includes a DC power supply 112 having a positive power supply terminal and a negative power supply terminal, the positive power supply terminal being connected to the positive terminal of the DC bus 111, and the negative power supply terminal being connected to the negative terminal of the DC bus 111.

[0078] DC power supply 112 is a device that provides DC power to the entire system. It has a positive terminal and a negative terminal. The positive terminal is the high-potential end where DC power supply 112 outputs electrical energy. The negative terminal is the low-potential end where DC power supply 112 outputs electrical energy and is also the path for current to return to the DC power supply. The positive terminal of DC power supply 112 is connected to the positive terminal of DC bus 111, and the negative terminal is connected to the negative terminal of DC bus 111. This establishes a complete power path from DC power supply 112 to DC bus 111, and then through DC bus 111 to each load. This ensures that DC power supply 112 can stably deliver electrical energy to DC bus 111, and then DC bus 111 distributes the electrical energy to each load according to the system's needs. This connection method guarantees that each load receives a stable supply of DC power from DC power supply 112, avoiding abnormal equipment operation due to unstable power connection.

[0079] In this disclosure, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0080] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0081] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0083] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0084] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A portable phase detection and adjustment device, characterized in that, include: Portable carrying case with multiple low-pressure measuring heads; The rectifier cabinet has R-phase line, S-phase line and T-phase line; An oscilloscope has a first oscilloscope channel, a second oscilloscope channel, a third oscilloscope channel, and a fourth oscilloscope channel. The first oscilloscope channel and the second oscilloscope channel are each connected to a different low-voltage measuring head. The third oscilloscope channel is connected to the R-phase line, S-phase line, and T-phase line of the rectifier cabinet. The fourth oscilloscope channel is also connected to the R-phase line, S-phase line, and T-phase line of the rectifier cabinet. The control board has a first comparator, a second comparator, and a processor. The input terminals of the first comparator are connected to the first oscilloscope channel and the third oscilloscope channel, respectively. The input terminals of the second comparator are connected to the second oscilloscope channel and the fourth oscilloscope channel, respectively. The processor is connected to the output terminals of the first comparator and the second comparator, respectively. The processor is used to process the comparison results of the first comparator and the second comparator.

2. The portable phase detection and adjustment device according to claim 1, characterized in that, The portable suitcase includes: The cable plug is connected to the R-phase, S-phase, and T-phase lines of the rectifier cabinet; A voltage transformer, one end of which is connected to the cable plug, is used to convert high voltage to low voltage; The low-voltage measuring head is connected on one side to the other end of the voltage transformer, and on the other side to the first and second oscilloscope channels of the oscilloscope.

3. The portable phase detection and adjustment device according to claim 2, characterized in that, The portable suitcase also includes: A high-voltage fuse, one end of which is connected to the cable plug and the other end of which is connected to the voltage transformer, blows when the current in the rectifier cabinet exceeds a preset current value. An auxiliary contact is provided, with one end connected to the rectifier cabinet and the other end connected to the high-voltage fuse. The auxiliary contact is used to disconnect the connection between the auxiliary contact and the rectifier cabinet in the event that the high-voltage fuse blows.

4. The portable phase detection and adjustment device according to claim 1, characterized in that, Also includes: An insulating clamp is provided, wherein the R-phase line, S-phase line, and T-phase line of the rectifier cabinet are all connected to one end of the insulating clamp; The high-voltage cable has one end connected to the other end of the insulating clamp and the other end connected to the cable plug.

5. The portable phase detection and adjustment device according to claim 1, characterized in that, The portable suitcase also includes: A voltmeter is located on the top of the portable carrying case to display the measured voltage.

6. The portable phase detection and adjustment device according to claim 5, characterized in that, The display voltmeter also includes: An incoming line voltmeter is located on the top of the portable carrying case and is used to display the incoming line voltage of the portable carrying case. A line voltage meter is located on the top of the portable suitcase to display the measured line voltage of the portable suitcase.

7. The portable phase detection and adjustment device according to claim 2, characterized in that, The voltage transformer further includes: a first interface, a second interface, a third interface, a fourth interface, a fifth interface, and a sixth interface; The first interface, the second interface, and the third interface are all connected to the cable plug; Both the fourth and fifth interfaces are connected to the first oscilloscope channel via the low-voltage measuring head. Both the fifth and sixth interfaces are connected to the second oscilloscope channel via the low-voltage measuring head.

8. The portable phase detection and adjustment device according to claim 1, characterized in that, Also includes: The third oscilloscope channel is connected to the R-phase line and S-phase line of the rectifier cabinet; The fourth oscilloscope channel is connected to the S-phase line and T-phase line of the rectifier cabinet.

9. The portable phase detection and adjustment device according to claim 1, characterized in that, The rectifier cabinet also includes: The DC busbar has a positive and a negative terminal.

10. The portable phase detection and adjustment device according to claim 9, characterized in that, Also includes: A DC power supply has a positive terminal and a negative terminal, wherein the positive terminal is connected to the positive terminal of the DC busbar and the negative terminal is connected to the negative terminal of the DC busbar.

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