Handheld nuclear phase instrument

Abstract

The utility model relates to the technical field of electric power system detection, in particular to a handheld nuclear phase instrument, which comprises a shell, a detection part for detecting voltage data is arranged at one end of the outer wall of the shell, a processing part for processing the detected data is arranged in the shell, the detection part comprises a nuclear phase head, and the nuclear phase head is connected with the shell. The phase checking head is of a two-section structure, and an electromagnetic voltage transformer for detecting voltage is arranged in the phase checking head. Voltage data of a cable to be detected can be directly obtained through the phase checking head of the device; in this way, high-voltage-high-voltage nuclear phase detection, high-low-voltage mixed nuclear phase detection and low-voltage-low-voltage nuclear phase detection can be directly carried out, and the detection sensor and the indicator are limited in one mode, so that errors caused by detection equipment can be reduced, the success rate of all-scene nuclear phase is increased, and the detection efficiency is improved. And phase checking result misjudgment caused by primary and secondary wiring errors, construction wiring errors and the like is also avoided.

Description

Technical Field

[0001] This utility model relates to the field of power system testing technology, specifically to a handheld phase comparator. Background Technology

[0002] To ensure the safe and stable operation of the power system, three-phase circuit phase verification must be performed before substations, transmission lines, and various equipment are renovated, expanded, upgraded, or repaired and put into use. This confirms that the voltage phases are consistent and that the phase sequence of the transmission lines matches the phase sequence required by the user's three-phase load, ensuring safe power supply. Otherwise, it may damage power generation and supply equipment or even cause tripping accidents. However, the phase of most equipment or lines in the power grid cannot be obtained by direct observation and can only be determined by instruments.

[0003] However, in practical use, existing phase detection instruments are typically used by maintenance personnel at the live indicator (secondary side). The voltage signal of the live indicator is obtained from the voltage sensor on the primary side of the cable. Due to the differences in sensors and indicators from different manufacturers, the phase measured at the live indicator (secondary side) is inconsistent with the actual phase measured on the primary side, resulting in inaccurate phase detection results. This leads to a phase detection success rate of only 77.9%, resulting in significant errors between high-voltage-high-voltage phase detection, high-low-voltage mixed phase detection, and low-voltage-low-voltage phase detection. Consequently, the phase detection accuracy cannot meet the needs of power plants, thus exhibiting certain shortcomings.

[0004] In conclusion, it is very necessary to invent a handheld phase comparator. Utility Model Content

[0005] To address this issue, this invention provides a handheld phase comparator to solve the problem that existing phase comparators have significant errors when performing high-pressure-high-pressure phase comparison, high-low-pressure mixed phase comparison, and low-pressure-low-pressure phase comparison, resulting in a phase comparison accuracy that cannot meet the needs of power plants.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a handheld phase comparator, including a housing, wherein a detection component for detecting voltage data is provided at one end of the outer wall of the housing, and a processing component for processing the detection data is provided inside the housing;

[0007] The detection component includes a phase detection head, which has a two-section structure, and an electromagnetic voltage transformer for detecting voltage is installed inside the phase detection head.

[0008] Preferably, one end of the nuclear phase head is hinged to the outer wall side of the housing, and the outer wall of the housing and the upper and lower sides of the hinged end of the nuclear phase head are fixed with limiting plates.

[0009] Preferably, a support partition is fixed to the inner wall of the shell and the side near the nucleus head. A partition plate is fixed to the center of the outer wall of the support partition near the fixed plate. A reset spring for resetting is fixed to both sides of the outer wall of the partition plate.

[0010] Preferably, the end of the reset spring away from the partition plate abuts against the outer wall of the phase head away from the hinge end, the top of the outer wall of the housing is provided with a display panel for displaying the detection data, and the bottom of the outer wall of the housing is connected to an extension rod connector.

[0011] Preferably, the processing component includes a motherboard, which is installed inside the housing and located on the side of the support partition away from the nuclear phase head. The motherboard is also provided with a main control processor for processing data.

[0012] Preferably, the motherboard is also equipped with a clock module for use with the core phase head and a wireless transmission unit for remote data transmission, both of which are connected to the main control processor.

[0013] Preferably, the motherboard is further provided with a communication unit, which is connected to the sensors and main control processor on the phase head, and a power supply module for power supply is also provided inside the housing and on one side of the motherboard.

[0014] The beneficial effects of this utility model are:

[0015] In this invention, the phase comparison head of the device can directly acquire the voltage data of the cable at the point to be tested. This allows for direct detection of high-voltage-high-voltage phase comparison, high-low-voltage mixed phase comparison, and low-voltage-low-voltage phase comparison. Furthermore, the detection sensors and indicators are limited to a single type, which reduces errors caused by the detection equipment. This improves the success rate of phase comparison in all scenarios and avoids misjudgments of phase comparison results caused by primary or secondary wiring errors, construction wiring errors, etc., thereby improving the efficiency of line operation and maintenance and ensuring the stability and reliability of the power grid. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the handheld device of this utility model from the front view.

[0017] Figure 2 This is a schematic diagram of the internal structure of the handheld device of this utility model from the front view.

[0018] Figure 3 This is a schematic diagram of the overall system structure of the handheld device of this utility model;

[0019] Figure 4 This is a schematic diagram illustrating the working principle of the entire phase comparator in this utility model;

[0020] Figure 5 This is a schematic diagram of the circuit structure of the main control processor in this utility model;

[0021] Figure 6 This is a schematic diagram of the circuit structure of the power supply module in this utility model;

[0022] Figure 7 This is a schematic diagram of the circuit structure of the communication unit in this utility model;

[0023] Figure 8 This is a schematic diagram of the circuit structure of the wireless transmission unit of this utility model;

[0024] Figure 9 This is a schematic diagram of the clock module circuit in this utility model;

[0025] Figure 10 This is a functional schematic diagram of the entire phase comparator of this utility model.

[0026] In the diagram: 100, housing; 110, display panel; 120, extension rod connector; 130, support partition; 200, phase detector; 210, partition plate; 220, return spring; 230, fixing plate; 300, main board; 310, main control processor; 320, clock module; 330, wireless transmission unit; 340, communication unit. Detailed Implementation

[0027] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] See attached document Figure 1 - Figure 10The handheld phase comparator provided by this utility model includes a housing 100. One end of the outer wall of the housing 100 is equipped with a detection component for detecting voltage data. The detection component includes a phase comparator head 200, which has a two-section structure. An electromagnetic voltage transformer for voltage detection is installed inside the phase comparator head 200. The phase comparator head 200 can clamp the cable at the measurement point, and then detect the voltage value at the measurement point through the built-in electromagnetic voltage transformer. The entire phase comparator principle uses the phase comparator FFT algorithm. The FFT algorithm is an efficient method for calculating the Discrete Fourier Transform (DFT). In the phase-core algorithm, it is mainly used to convert the voltage signal in the time domain to the frequency domain for analysis, thereby accurately obtaining information such as the frequency and phase of the signal. In the phase-core process, the acquired voltage signal is a time-domain signal that changes with time. Based on the divide-and-conquer strategy and the characteristics of the rotation factor, the FFT algorithm decomposes the DFT of a discrete sequence of length N into multiple shorter DFT sequences. By continuously decomposing and merging the calculations, the amount of computation is greatly reduced, and the spectral distribution of the signal in the frequency domain can be obtained quickly and accurately. The fundamental frequency of the signal can be accurately determined in the frequency domain, and the phase difference between different voltage signals can be calculated according to the definition of phase difference, thus realizing the phase counting function. One end of the phase counting head 200 is hinged to the outer wall side of the housing 100. A limiting plate 230 is fixed on both the upper and lower sides of the outer wall of the housing 100 at the hinge end of the phase counting head 200. The fixing plate 230 is mainly used to limit the hinge end of the phase counting head 200, ensuring that the phase counting head 200 can only open or close, and also preventing the phase counting head 200 from separating. A supporting partition 130 is fixed on the inner wall of the housing 100 near the phase counting head 200. A partition plate 210 is fixed at the center of the outer wall of the supporting partition 130 near the fixing plate 230. The partition plate 210 is used to support the two ends of the reset spring 220. The reset spring 220 is fixed on both sides of the outer wall of the partition plate 210. The end of the reset spring 220 away from the partition plate 210 abuts against the outer wall of the phase detection head 200 away from the hinge end. The top of the outer wall of the housing 100 is provided with a display panel 110 for displaying the detection data. The bottom of the outer wall of the housing 100 is connected to an extension rod connector 120. The reset spring 220 is used to enable the phase detection head 200 to quickly reset when it is open through elastic force, so that the detection end of the phase detection head 200 is in a closed state. The extension rod connector 120 allows personnel to fix the extension plate by threaded connection, so that personnel can use a handheld instrument for phase detection.

[0029] The housing 100 houses a processing unit for processing detection data. This processing unit includes a motherboard 300, which is installed inside the housing 100 and located on the side of the support partition 130 away from the phase comparison head 200. The motherboard 300 also houses a main control processor 310 for data processing. The main control processor 310 can be an STM32 series microcontroller, and its main functions are to send synchronization commands to the phase comparison head, collect and process the acquired voltage data, and upload or receive data from a server. The motherboard 300 also includes a clock module 320 that works with the phase comparison head 200 and a wireless transmission unit 330 for remote data transmission. Both the clock module 320 and the wireless transmission unit 330 are connected to the main control processor 310. To provide a unified time standard for phase tracing operations, if the current time is the same as the time received by the device, a phase tracing command is initiated. The wireless transmission unit 330 is mainly used to receive data from the handheld main control processor 310 and the server, enabling data interaction between the handheld device, the base station, and the server. The motherboard 300 is also equipped with a communication unit 340, which is connected to the sensors on the phase tracing head 200 and the main control processor 310. The communication unit 340 can use LoRa technology to achieve communication between the phase tracing head 200 and the motherboard 300. Inside the housing 100 and on one side of the motherboard 300, there is also a power supply module for powering the operation of the handheld device. The power supply module is mainly a lithium battery.

[0030] Specifically, the handheld device receives voltage data collected by the phase cross-section head 200 via LoRa communication. The collected data is then uploaded to the cloud server via 4G wireless transmission. The base station uses BeiDou timing and uploads the voltage standard data to the cloud server via the 4G network. After receiving the data from both handheld devices, the cloud server calculates the voltage data using the phase cross-section algorithm and sends the result back to the handheld device. Maintenance personnel can view the results and historical data on the handheld device.

[0031] The usage process of this utility model is as follows: those skilled in the art can first assemble the device according to the above description, then connect all electrical equipment to an external power supply, and control the operation of the device through an external controller;

[0032] When near-field phase verification is required, the handheld device sends a synchronous phase verification command. The high and low voltage phase verification head 200 collects the voltage data to be measured. After receiving the data transmitted back from the phase verification head, the handheld device calculates the phase verification result using the phase verification algorithm. When performing remote phase verification, the base station measures the standard voltage phase, and the handheld device measures the voltage phase to be measured and uploads it to the base station and the server. Then, it waits for the phase verification result to be transmitted back from the server. The phase verification server receives the phase data uploaded by the handheld device and the base station, analyzes the data using the phase verification algorithm, stores the obtained phase verification result locally, and transmits it back to the handheld device. Users can view the phase verification result and historical data on the handheld device.

[0033] The phase comparison detection process is as follows: Personnel can open the phase comparison head 200 so that its inner side is on the outside of the cable to be tested. The voltage value of the detection point can be obtained through the electromagnetic voltage transformer built into the phase comparison head 200. The voltage value is sent to the main control processor 310 on the motherboard 300 through the communication unit 340. The main control processor 310 can receive and process the data and upload it to the cloud server through the wireless transmission unit 330. After receiving the data from the two handheld devices, the cloud server calculates the results through the phase comparison algorithm and sends the results back to the handheld devices. Maintenance personnel can view the results and historical data on the handheld devices.

[0034] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A hand-held nuclear phase meter characterized by: The application relates to a voltage detection device, which comprises a shell (100), a detection component arranged at one end of the outer wall of the shell (100) for detecting voltage data, and a processing component arranged in the shell (100) for processing the detection data. The detection component comprises a nuclear phase head (200) in a two-section structure, and an electromagnetic voltage transformer arranged in the nuclear phase head (200) for detecting voltage.

2. The hand-held nuclear phase meter of claim 1, wherein: One end of the nuclear phase head (200) is hingedly connected to the outer wall side end of the shell (100), and fixing plates (230) are fixed to the upper and lower sides of the outer wall of the shell (100) and located at the hinged end of the nuclear phase head (200).

3. The hand-held nuclear phase meter of claim 2, wherein: A support partition plate (130) is fixed to one side of the inner wall of the shell (100) and close to the nuclear phase head (200), and a partition plate (210) is fixed to the outer wall center of one end of the support partition plate (130) close to the fixing plate (230), and reset springs (220) are fixed to the outer wall sides of the partition plate (210).

4. The hand-held nuclear phase meter of claim 3, wherein: The outer wall side of one end of the reset spring (220) far away from the partition plate (210) is in abutment with the outer wall of the nuclear phase head (200) far away from the hinged end, a display panel (110) for displaying the detection data is arranged at the top end of the outer wall of the shell (100), and an extension rod joint (120) is connected to the bottom end of the outer wall of the shell (100).

5. The hand-held nuclear phase meter of claim 3, wherein: The processing component comprises a mainboard (300) arranged in the shell (100) and located at one side of the support partition plate (130) far away from the nuclear phase head (200), and a main control processor (310) for processing data is further arranged on the mainboard (300).

6. The hand-held nuclear phase meter of claim 5, wherein: A clock module (320) used in cooperation with the nuclear phase head (200) and a wireless transmission unit (330) for remote data transmission are further arranged on the mainboard (300), and the clock module (320) and the wireless transmission unit (330) are connected with the main control processor (310).

7. The hand-held nuclear phase meter of claim 6, wherein: A communication unit (340) is further arranged on the mainboard (300), the communication unit (340) is connected with the sensor on the nuclear phase head (200) and the main control processor (310), and a power module for power supply is further arranged in the shell (100) and located at one side of the mainboard (300).

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