Phase sequence generation device, method and use for distribution network

Abstract

The present invention discloses a phase sequence generating device, method and application for a power distribution network, and relates to the technical field of phase sequence synchronization indication; the phase sequence generating device comprises a phase sequence generating module, which is used to obtain the phase sequence of an AC voltage signal before maintenance and use it as a designated phase sequence, and generate an analog AC voltage signal with a consistent phase sequence according to the designated phase sequence; the phase sequence generating method comprises a phase sequence generating step, which obtains the phase sequence of an AC voltage signal before maintenance and uses it as a designated phase sequence, and generates an analog AC voltage signal with a consistent phase sequence according to the designated phase sequence; the application comprises obtaining the phase sequence of an AC voltage signal before maintenance for generating an analog AC voltage signal with a consistent phase sequence, and using the analog AC voltage signal as a reference signal for phase verification; and using the improved phase sequence generating module for phase verification, thereby improving the efficiency of phase verification.

Description

Technical Field

[0001] The present invention relates to the technical field of phase sequence synchronization indication, and in particular to a phase sequence generation device, method and application for a power distribution network. Background Art

[0002] The author searched with the search formula TTL_ALL:(phase) AND TACD_ALL:(phase AND (occurence OR generation OR formation) AND sine wave AND power), and obtained the following relatively close prior art solutions.

[0003] The authorization announcement number is CN104635002B, and the name is "Three-Phase Two-Waveform Adjustable Phase Angle Signal Generator for Power Systems." The device includes a power supply circuit, a data calculation and waveform compilation circuit, a phase angle setting circuit, and a sinusoidal waveform conversion circuit. The data calculation and waveform compilation circuit is connected to the power supply circuit, phase angle setting circuit, and sinusoidal waveform conversion circuit. The phase angle setting circuit includes two DIP switches 2, two transistors, and three push switches. The two DIP switches are K21 and K22, the two transistors are V1 and V2, and the three push switches are K23, K24, and K25. The data calculation and waveform compilation circuit is a single-chip integrated circuit. This greatly shortens detection time, reduces employee labor intensity, improves work efficiency, and enhances test accuracy and correctness. It can convert generated square waves and sine waves, and actively promotes the development of intelligent power grid construction and management technology.

[0004] The authorization announcement number is CN215894770U, and the device is titled "Phase Check Detection Device for Testing Power Supply Circuit Voltage Phase." It includes a main controller, a test voltage output interface, a sampling voltage input interface, a phase check module, a test voltage generation module, a display screen, an indicator light group, a phase adjustment knob assembly, a wireless signal transceiver, and a power supply module. The sampling voltage input interface, the phase check module, the test voltage generation module, the touch display module, the indicator light group, the power supply module, and the wireless signal transceiver are all electrically connected to the main controller, and the power supply module is used to power all electrical devices.

[0005] The author searched with the search formula TTL_ALL:((collect OR obtain OR measure) AND (phase OR phase sequence)) AND TACD_ALL:((collect OR obtain OR measure) AND (phase OR phase sequence) AND sine wave AND power), and obtained the following relatively close existing technical solutions.

[0006] The authorization announcement number is CN206756941U, and the name is a three-phase phase sequence wireless measurement device for high-voltage AC lines. It includes three collectors and a host. The three collectors all have wireless radio frequency transmitting units, and the frequency bands of the wireless radio frequency transmitting units of the three collectors are different. The host has a wireless radio frequency receiving unit. The collector also has a capacitive inductive sampling unit for sampling the voltage waveform of the high-voltage line and a collection conversion unit for converting the sine waveform into a square wave. The output end of the capacitive inductive sampling unit is connected to the input end of the collection conversion unit, and the output end of the collection conversion unit is connected to the wireless radio frequency transmitting unit. The use of wireless radio frequency technology ensures line safety and personal safety, and realizes simultaneous measurement of three-phase high-voltage lines. The results are simple and clear. Any two collectors can also cooperate to complete the phase verification work, and can also directly measure the phase value of 10KV to 500KV lines, avoiding the need for secondary equipment.

[0007] The authorization announcement number is CN103257273B, and the name is "Method for Measuring Phase Difference of Co-Frequency Periodic Signals." The method includes the following steps: S1, synchronously sampling W sampling data of two co-frequency periodic signals at equal intervals; S2, obtaining the harmonic amplitudes A1k and A2k and harmonic phase angles of the m1 and m2 subharmonics of the two co-frequency periodic signals; S3, calculating the initial phase angles of the two co-frequency periodic signals based on the harmonic amplitudes A1k and A2k and the harmonic phase angles; S4, calculating the phase difference based on the difference between the two initial phase angles to obtain a high-precision phase difference measurement result, thereby improving the quality of instruments and equipment in the fields of power equipment status monitoring, signal acquisition and analysis, communication, and automatic control based on phase difference technology.

[0008] The author searched with the search formula TTL_ALL:((nuclear OR inspection) AND phase) AND TACD_ALL:((nuclear OR inspection) AND phase AND sine wave AND power), and obtained the following relatively close existing technical solutions.

[0009] The authorization announcement number is CN209215483U, and its name is "A Substation Inter-Bay Multi-Mode Phase Check Device." It includes a phase comparison module, a delay module, and an analog acquisition module. The output of the delay module is connected to the pulse input of the SV decoding module, the signal output of the SV decoding module is connected to the digital input of the digital-to-analog conversion module, the analog output of the digital-to-analog conversion module is connected to the input of a first sine wave to square wave module, the output of the first sine wave to square wave module is connected to the input of a multiplexer, the analog output of the analog acquisition module is connected to the input of a second sine wave to square wave module, the output of the second sine wave to square wave module is connected to the input of a multiplexer, and the output of the multiplexer is connected to the input of the phase comparison module. The device is suitable for both conventional and intelligent substations and is compatible with both SV digital sampling values ​​and transformer analog sampling values.

[0010] The authorization announcement number is CN214226116U, and the name is a power line phase verification signal acquisition device. It includes an acquisition head and a telescopic rod. A counterweight is installed on one side of the acquisition head, and a control panel is installed on the other side of the acquisition head. A groove is provided on the upper part of the acquisition head, and a sensing end is provided on one side of the groove. The sensing end is connected to the control panel. A mounting seat is provided at the bottom of the acquisition head, and a locking mechanism is provided in the mounting seat. A connector is provided on the top of the telescopic rod, and a limiting mechanism is provided on the connector. The connector is inserted into the mounting seat, and the limiting mechanism cooperates with the locking mechanism. During the phase verification operation, the acquisition head is suspended on the power line using the telescopic rod. Then, the voltage sine wave consistent with the power line is sensed by the sensing end. The induced signal is remotely sent to the receiving end through the wireless communication module to complete the signal acquisition. The overall structural design is simple, easy to assemble, and easy to carry.

[0011] The author searched with the search formula TTL_ALL:(wireless photodetector) and obtained the following relatively close existing technical solutions.

[0012] The authorization announcement number is CN212989483U, and the name is a remote wireless phase analyzer. It includes a box body, an insulating telescopic rod is provided on one side of the box body, a transmitter is provided on one side of the insulating telescopic rod, a connecting device is provided at the bottom of the transmitter, and a supporting device is provided at the bottom of the box body. The connecting device includes a connecting tube, the connecting tube is fixedly connected to the transmitter, a limit strip is fixedly installed on the inner wall of the connecting tube, a baffle is slidably connected inside the connecting tube, a spring is fixedly installed between the baffle and the connecting tube, a rotating ring is sleeved on the outer surface of the connecting tube, a connecting groove is provided inside the connecting tube, a limit block is fixedly installed on the outer surface of the rotating ring, and the limit block passes through the connecting groove and extends to the inside of the connecting tube. By providing this connecting device, the time required for the staff to install the transmitter is shortened, the staff can quickly perform measurements, and the staff's work efficiency is improved.

[0013] The authorization announcement number is CN205539215U, and the name is "Low-voltage Wireless Phase Checker." It includes a wirelessly connected collector and host computer. The collector communicates with the host computer via adaptive frequency-hopping Bluetooth. The collector includes a signal trigger unit, a signal acquisition unit, a central processor, an op amp unit, and a communication transmission unit. The signal trigger unit is simultaneously connected to the central processor and the signal acquisition unit, which in turn is connected to the op amp unit and the signal acquisition unit. The signal acquisition unit is connected to the op amp unit, which is then connected to the communication transmission unit. The host computer includes a communication receiving unit, a low-pass filter unit, an A / D converter unit, a central processor, a display, a memory, and a voice unit. The communication receiving unit is sequentially connected to the low-pass filter unit, the A / D converter unit, and the central processor. The central processor is connected to the display, the memory, and the voice unit. The collector can be a general collector, a dedicated collector for ring main units, or a dedicated collector for central cabinets. Wireless phase checking is achieved for high-voltage lines, ring main units, and central cabinets.

[0014] Combining the above patent documents and existing technical solutions, the inventors analyze the existing technical solutions as follows.

[0015] In the daily operation and maintenance of distribution networks, large-scale comprehensive overhauls and complex faults requiring widespread outages often involve the disconnection and replacement of multiple distribution lines, switches, and circuit breakers. This necessitates phase verification before the distribution equipment and lines are put into operation. Currently, large-scale comprehensive overhauls and fault recovery operations on distribution lines require live phase verification on both sides of the switch. If the phase verification results indicate a phase error, repeated outages are required to re-phase the distribution lines, resulting in higher outage costs and significant inconvenience.

[0016] Existing technical problems and considerations:

[0017] How to solve the problem of generating phase sequence signals according to the required phase sequence so as to improve the efficiency of the nuclear phase. Summary of the Invention

[0018] The technical problem to be solved by the present invention is to provide a phase sequence generation device, method and use for a distribution network, and to improve the phase sequence generation to solve the technical problem of improving the phase efficiency.

[0019] In order to solve the above technical problems, the technical solution adopted by the present invention is: a phase sequence generating device for a distribution network includes a phase sequence generating module, which is used to obtain the phase sequence of the AC voltage signal before maintenance and use it as the designated phase sequence, and generate an analog AC voltage signal with a consistent phase sequence according to the designated phase sequence.

[0020] A further technical solution is that the phase sequence generation module includes a phase sequence collector, a communication unit, a phase sequence controller and a generator. The phase sequence collector is connected to and communicates with the communication unit of the phase sequence generation device, the communication unit of the phase sequence generation device is connected to and communicates with the phase sequence controller, and the communication unit of the phase sequence generation device is connected to and communicates with the generator. The phase sequence collector is used to obtain the phase sequence of the AC voltage signal on the line before maintenance and send it to the phase sequence controller. The phase sequence controller is used to obtain the phase sequence sent by the phase sequence collector and send it to the generator. The generator is used to obtain the phase sequence sent by the phase sequence controller and generate an analog AC voltage signal with a consistent phase sequence.

[0021] A further technical solution is that the phase sequence generation module also includes a phase sequence generation program module, which is used for the phase sequence collector to obtain the phase sequence of the AC voltage signal before maintenance on the first node and send it to the phase sequence controller, the phase sequence controller obtains the phase sequence of the AC voltage signal before maintenance and sends it to the generator, and the generator obtains the phase sequence of the AC voltage signal before maintenance and generates an analog AC voltage signal with a consistent phase sequence.

[0022] A further technical solution is that the phase sequence generation program module is also used when the phase sequence controller obtains the phase verification result sent from the outside, and the phase sequence controller displays the phase verification result through the expressor.

[0023] A further technical solution is that the phase sequence generating program module is also used to obtain the phase sequence of the AC voltage signal before maintenance when the phase sequence controller obtains the first working instruction, and when the phase sequence controller obtains the second working instruction, the phase sequence controller allows the generation of an analog AC voltage signal.

[0024] A further technical solution is that the phase sequence generation program module is a first phase sequence generation module, which is used when the phase sequence controller obtains a maintenance instruction sent by the handheld terminal, the phase sequence controller obtains the phase sequence of the AC voltage signal before maintenance sent by the phase sequence collector, and when the phase sequence controller obtains an analog instruction sent by the handheld terminal, the phase sequence controller sends the phase sequence of the AC voltage signal before maintenance to the generator.

[0025] A further technical solution is that the phase sequence generation program module is a second phase sequence generation module, which is used when the phase sequence controller obtains the collection instruction issued by the maintenance personnel through the collection button, and the phase sequence controller obtains the phase sequence of the AC voltage signal before maintenance sent by the phase sequence collector. When the phase sequence controller obtains the simulation instruction issued by the maintenance personnel through the simulation button, the phase sequence controller sends the phase sequence of the AC voltage signal before maintenance to the generator.

[0026] A further technical solution is that the phase sequence generation program module is a third phase sequence generation module, which is used when the phase sequence controller obtains the acquisition instruction issued by the maintenance personnel through the touch screen, the phase sequence controller sends the acquisition instruction to the outside, and the phase sequence controller obtains the phase sequence of the AC voltage signal before maintenance. When the phase sequence controller obtains the simulation instruction issued by the maintenance personnel through the touch screen, the phase sequence controller sends the simulation instruction to the outside, and the phase sequence controller sends the phase sequence of the AC voltage signal before maintenance to the generator.

[0027] A further technical solution is that the third phase sequence generating module is also used for displaying the phase checking result on the touch screen of the phase sequence controller when the phase sequence controller obtains the phase checking result sent from the outside.

[0028] A further technical solution is that the phase sequence controller includes a collection button and a simulation button, the collection button is electrically connected to the phase sequence controller, and the simulation button is electrically connected to the phase sequence controller.

[0029] A further technical solution is that: the phase sequence controller includes a touch unit, and the touch unit is electrically connected to the phase sequence controller.

[0030] A phase sequence generation method for a distribution network includes a phase sequence generation step, obtaining the phase sequence of an AC voltage signal before maintenance and using it as a designated phase sequence, and generating a simulated AC voltage signal with a consistent phase sequence according to the designated phase sequence.

[0031] A further technical solution is that: in the phase sequence generation step, the phase sequence generation device obtains the phase sequence of the AC voltage signal before maintenance at the first node, and the signal analyzer obtains the phase sequence of the AC voltage signal on the line before maintenance at the second node. During phase verification, the phase sequence generation device generates an analog AC voltage signal and sends it to the second node via the maintenance line; the signal analyzer obtains the phase sequence of the analog AC voltage signal on the line at the second node, compares the phase sequence of the AC voltage signal before maintenance with the phase sequence of the analog AC voltage signal, and obtains the phase verification result.

[0032] A phase sequence generating device for a distribution network is used to obtain the phase sequence of an AC voltage signal before maintenance to generate an analog AC voltage signal with a consistent phase sequence, and use the analog AC voltage signal as a reference signal for phase verification.

[0033] The beneficial effects of adopting the above technical solution are:

[0034] First, a phase sequence generator for a power distribution network includes a phase sequence generator module that obtains the phase sequence of an AC voltage signal before maintenance and uses it as a designated phase sequence. This module then generates a simulated AC voltage signal with a consistent phase sequence. This technical solution utilizes the improved phase sequence generator for phase verification, improving phase verification efficiency.

[0035] Second, a phase sequence generation method for a distribution network includes a phase sequence generation step, obtaining the phase sequence of the AC voltage signal before maintenance and using it as a designated phase sequence, and generating a simulated AC voltage signal with a consistent phase sequence based on the designated phase sequence. This technical solution utilizes the improved phase sequence generation method for phase verification, improving phase verification efficiency.

[0036] Third, a use for a distribution network includes obtaining the phase sequence of an AC voltage signal before maintenance to generate an analog AC voltage signal with a consistent phase sequence, and using the analog AC voltage signal as a reference signal for phase checking, thereby improving the efficiency of phase checking.

[0037] Please refer to the detailed description of the specific implementation method. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a principle block diagram of the first phase sequence generating device;

[0039] Figure 2 This is the principle block diagram of the second phase sequence generating device;

[0040] Figure 3 This is the principle block diagram of the third phase sequence generating device;

[0041] Figure 4 This is a block diagram of the principle of the first nuclear phase device;

[0042] Figure 5 This is a block diagram of the principle of the second nuclear phase device;

[0043] Figure 6 This is the principle block diagram of the third nuclear phase device;

[0044] Figure 7 This is the principle block diagram of the fourth nuclear phase device;

[0045] Figure 8 This is the principle block diagram of the first nuclear phase system;

[0046] Figure 9 This is the principle block diagram of the second nuclear phase system;

[0047] Figure 10 This is the principle block diagram of the third nuclear phase system;

[0048] Figure 11 It is a flow chart of the working process of the present invention;

[0049] Figure 12 It is the data flow diagram of the present invention. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0051] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0052] Example 1:

[0053] like Figure 1 As shown, the present invention discloses a phase sequence generating device for a power distribution network, including a phase sequence generating module for obtaining the phase sequence of an AC voltage signal before maintenance and using it as a designated phase sequence, and generating a simulated AC voltage signal with a consistent phase sequence based on the designated phase sequence. The phase sequence generating module in this embodiment is a hardware product, namely, a first phase sequence generating device.

[0054] The first phase sequence generating device:

[0055] like Figure 1 As shown, the first phase sequence generating device includes a phase sequence collector, a communication unit, a phase sequence controller and a generator. The phase sequence collector is connected to and communicates with the communication unit of the phase sequence generating device, the communication unit of the phase sequence generating device is connected to and communicates with the phase sequence controller, and the communication unit of the phase sequence generating device is connected to and communicates with the generator. The phase sequence collector is used to obtain the phase sequence of the AC voltage signal on the line before maintenance and send it to the phase sequence controller. The phase sequence controller is used to obtain the phase sequence sent by the phase sequence collector and send it to the generator. The generator is used to obtain the phase sequence sent by the phase sequence controller and use it as the specified phase sequence, and generate an analog AC voltage signal with a consistent phase sequence according to the specified phase sequence.

[0056] Among them, the phase sequence collector is the collector and the phase sequence controller is the controller.

[0057] The collector includes a processor, an operational amplifier unit, a trigger unit, a collection unit and a communication sending unit. The processor of the collector is electrically connected to the operational amplifier unit, the trigger unit and the collection unit respectively. The operational amplifier unit is electrically connected to the collection unit and the communication sending unit respectively. The trigger unit is electrically connected to the collection unit. The collector itself belongs to the existing technology and will not be described in detail.

[0058] The controller includes a processor, a memory and an analog-to-digital conversion unit. The processor of the controller is electrically connected to the memory and the analog-to-digital conversion unit respectively. The controller itself belongs to the existing technology and will not be described in detail.

[0059] The generator itself belongs to the existing technology and will not be described in detail.

[0060] like Figure 1 As shown, the analog-to-digital conversion unit of the phase sequence controller is electrically connected to the communication unit of the phase sequence generating device, the communication sending unit of the phase sequence collector is wirelessly connected and communicates with the communication unit of the phase sequence generating device, and the communication unit of the phase sequence generating device is wirelessly connected and communicates with the generator.

[0061] Example 2:

[0062] like Figure 2 As shown, the present invention discloses a phase sequence generating device for a power distribution network, including a phase sequence generating module for obtaining the phase sequence of an AC voltage signal before maintenance and using it as a designated phase sequence, and generating a simulated AC voltage signal with a consistent phase sequence based on the designated phase sequence. The phase sequence generating module in this embodiment is a hardware product, namely, a second phase sequence generating device.

[0063] Second phase sequence generating device:

[0064] like Figure 2 As shown, the second phase sequence generating device includes the first phase sequence generating device, and the phase sequence controller of the phase sequence generating device also includes an acquisition button and a simulation button. The acquisition button is electrically connected to the control end of the processor of the phase sequence controller, and the simulation button is electrically connected to the control end of the processor of the phase sequence controller.

[0065] The staff member presses the acquisition button to transmit the acquisition instruction to the phase sequence controller's processor. The phase sequence controller's processor receives the acquisition instruction and uses the phase sequence sent by the phase sequence collector as the designated phase sequence. The staff member presses the simulation button to transmit the simulation instruction to the phase sequence controller's processor. The phase sequence controller's processor receives the simulation instruction and sends the designated phase sequence to the generator. The generator receives the designated phase sequence and generates a simulated AC voltage signal with a consistent phase sequence based on the specified phase sequence.

[0066] Among them, the control end of the processor of the phase sequence controller is connected to the pull-up resistor, the control end of the processor is grounded through the acquisition button, and the control end of the processor is grounded through the analog button. Pressing the button will pull the corresponding control end low to achieve communication with the processor.

[0067] Example 3:

[0068] like Figure 3As shown, the present invention discloses a phase sequence generating device for a power distribution network, including a phase sequence generating module for obtaining the phase sequence of an AC voltage signal before maintenance and using it as a designated phase sequence, and generating a simulated AC voltage signal with a consistent phase sequence based on the designated phase sequence. The phase sequence generating module of this embodiment is a hardware product, namely, a third phase sequence generating device.

[0069] The third phase sequence generating device:

[0070] like Figure 3 As shown, the third phase sequence generating device includes the first phase sequence generating device, and the phase sequence controller of the phase sequence generating device further includes a touch unit, which is electrically connected to the processor of the phase sequence controller.

[0071] The staff member uses the touch unit to transmit the acquisition instruction to the phase sequence controller's processor. The phase sequence controller's processor receives the acquisition instruction and uses the phase sequence sent by the phase sequence collector as the designated phase sequence. The staff member uses the touch unit to transmit the simulation instruction to the phase sequence controller's processor. The phase sequence controller's processor receives the simulation instruction and sends the designated phase sequence to the generator. The generator receives the designated phase sequence and generates an analog AC voltage signal with a consistent phase sequence based on the specified phase sequence.

[0072] The touch control unit is a touch screen, and the touch control unit itself and the corresponding communication connection technology are existing technologies and will not be described in detail.

[0073] Example 4:

[0074] The present invention discloses a phase sequence generating device for a power distribution network, including a phase sequence generating module for obtaining the phase sequence of an AC voltage signal before maintenance and using it as a designated phase sequence, and generating a simulated AC voltage signal with a consistent phase sequence according to the designated phase sequence. The phase sequence generating module in this embodiment is a program module, i.e., a fourth phase sequence generating device.

[0075] Fourth phase sequence generating device:

[0076] The fourth phase sequence generating device includes a phase sequence generating program module, adopts simulation technology, and is connected to the computer simulation device through a collector and a computer simulation device.

[0077] The phase sequence generation program module is used to obtain the phase sequence of the AC voltage signal on the line before maintenance, and to generate a simulated AC voltage signal with consistent phase sequence through computer program simulation.

[0078] Example 5:

[0079] The present invention discloses a phase sequence generator for a power distribution network, including a phase sequence generator module for obtaining the phase sequence of an AC voltage signal before maintenance and using it as a designated phase sequence, and generating a simulated AC voltage signal with a consistent phase sequence based on the designated phase sequence. The phase sequence generator module of this embodiment is a combined hardware and software module, i.e., a fifth phase sequence generator.

[0080] Fifth phase sequence generating device:

[0081] The fifth phase sequence generating device includes a first phase sequence generating device and a first phase sequence generating module. The first phase sequence generating module is a program module.

[0082] The first phase sequence generating module is used for the phase sequence collector to obtain the phase sequence of the AC voltage signal before maintenance on the first node and send it to the phase sequence controller. When the phase sequence controller obtains the maintenance instruction sent from the outside, the phase sequence controller obtains the phase sequence of the AC voltage signal before maintenance sent by the phase sequence collector. When the phase sequence controller obtains the analog instruction sent from the outside, the phase sequence controller sends the phase sequence of the AC voltage signal before maintenance to the generator. The generator obtains the phase sequence of the AC voltage signal before maintenance and generates an analog AC voltage signal with a consistent phase sequence.

[0083] Example 6:

[0084] The present invention discloses a phase sequence generator for a power distribution network, including a phase sequence generator module for obtaining the phase sequence of an AC voltage signal before maintenance and using it as a designated phase sequence, and generating a simulated AC voltage signal with a consistent phase sequence based on the designated phase sequence. The phase sequence generator module of this embodiment is a combined hardware and software module, i.e., the sixth phase sequence generator.

[0085] Sixth phase sequence generating device:

[0086] The sixth phase sequence generating device includes a second phase sequence generating device and a second phase sequence generating module. The second phase sequence generating module is a program module.

[0087] The second phase sequence generating module is used for the phase sequence collector to obtain the phase sequence of the AC voltage signal before maintenance on the first node and send it to the phase sequence controller. When the phase sequence controller obtains the collection instruction issued by the maintenance personnel through the collection button, the phase sequence controller obtains the phase sequence of the AC voltage signal before maintenance sent by the phase sequence collector. When the phase sequence controller obtains the simulation instruction issued by the maintenance personnel through the simulation button, the phase sequence controller sends the phase sequence of the AC voltage signal before maintenance to the generator. The generator obtains the phase sequence of the AC voltage signal before maintenance and generates a simulated AC voltage signal with a consistent phase sequence.

[0088] Compared with Example 6, it also includes an expresser, the phase sequence controller is electrically connected to the expresser, and the second phase sequence generating module is also used for the phase sequence controller to display the phase verification result through the expresser when the phase sequence controller obtains the phase verification result sent from the outside.

[0089] The expression device is a display, a voice player or a printing device.

[0090] Example 7:

[0091] The present invention discloses a phase sequence generator for a power distribution network, including a phase sequence generator module for obtaining the phase sequence of an AC voltage signal before maintenance and using it as a designated phase sequence, and generating a simulated AC voltage signal with a consistent phase sequence based on the designated phase sequence. The phase sequence generator module of this embodiment is a combined hardware and software module, i.e., the seventh phase sequence generator.

[0092] Seventh phase sequence generating device:

[0093] The seventh phase sequence generating device includes a third phase sequence generating device and a third phase sequence generating module. The third phase sequence generating module is a program module.

[0094] The third phase sequence generating module is used for the phase sequence collector to obtain the phase sequence of the AC voltage signal before maintenance on the first node and send it to the phase sequence controller. When the phase sequence controller obtains the collection instruction issued by the maintenance personnel through the touch screen, the phase sequence controller sends the collection instruction to the outside, and the phase sequence controller obtains the phase sequence of the AC voltage signal before maintenance. When the phase sequence controller obtains the simulation instruction issued by the maintenance personnel through the touch screen, the phase sequence controller sends the simulation instruction to the outside, and the phase sequence controller sends the phase sequence of the AC voltage signal before maintenance to the generator. The generator obtains the phase sequence of the AC voltage signal before maintenance and generates a simulated AC voltage signal with a consistent phase sequence.

[0095] Compared with embodiment 7, the third phase sequence generating module is further configured to display the phase checking result on the touch screen of the phase sequence controller when the phase sequence controller obtains the phase checking result sent from the outside.

[0096] Example 8:

[0097] The present invention discloses a phase sequence generation method for a power distribution network, based on Example 1, comprising the following phase sequence generation steps:

[0098] The phase sequence of the AC voltage signal before maintenance is obtained and used as the designated phase sequence, and a simulated AC voltage signal with a consistent phase sequence is generated according to the designated phase sequence.

[0099] Compared with Example 8, based on any of the above-mentioned phase sequence generating devices, the phase sequence of the AC voltage signal on the line before maintenance is obtained and an analog AC voltage signal with a consistent phase sequence is generated.

[0100] Example 9:

[0101] The present invention discloses a phase sequence generation method for a distribution network, based on Example 1, including a phase sequence generation step and a phase checking step:

[0102] Phase sequence generation step: obtaining the phase sequence of the AC voltage signal before maintenance and using it as the designated phase sequence, and generating a simulated AC voltage signal with a consistent phase sequence according to the designated phase sequence.

[0103] Phase verification steps: Use a signal analyzer to obtain the phase sequence of the AC voltage signal on the line before maintenance, obtain the phase sequence of the simulated AC voltage signal on the line, compare the phase sequence of the AC voltage signal before maintenance with the phase sequence of the simulated AC voltage signal, and obtain the phase verification result.

[0104] Phase sequence and phase verification method:

[0105] The original infrastructure to be shut down includes substations and lines to be repaired and switches that require phase verification. The substations, lines and switches are connected in sequence.

[0106] The phase sequence generator is installed at the first node of the maintenance task, namely the substation to be repaired. The signal analyzer is installed at the second node of the maintenance task, namely the switch to be phase-checked. The phase sequence generator obtains the phase sequence of the AC voltage signal on the line before maintenance, and the signal analyzer obtains the phase sequence of the AC voltage signal on the line before maintenance. After maintenance is completed, the phase sequence generator generates a simulated AC voltage signal with the same phase sequence based on the obtained phase sequence of the AC voltage signal to be repaired. The simulated AC voltage signal is sent via the repaired line to the switch to be phase-checked (i.e., the switch to be phase-checked). The signal analyzer obtains the phase sequence of the simulated AC voltage signal on the line after maintenance and compares the phase sequence of the AC voltage signal to obtain the phase-check result.

[0107] Example 10:

[0108] The present invention discloses a phase sequence generating device for a power distribution network, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of Example 8 are implemented.

[0109] Example 11:

[0110] The present invention discloses a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in Example 8 are implemented.

[0111] Compared with the above embodiment, the program module therein can also be a hardware module made using existing logical operation technology to implement corresponding logical operation steps, communication steps and control steps, and thus implement the above corresponding steps. The logical operation unit therein is existing technology and will not be repeated.

[0112] Example 12:

[0113] The present invention discloses a method for use in a distribution network, including a phase sequence generating device for obtaining the phase sequence of an AC voltage signal on a line before maintenance and generating an analog AC voltage signal with a consistent phase sequence, and using the analog AC voltage signal as a reference signal for phase verification so as to facilitate the next phase verification step.

[0114] The corresponding supporting products are as follows:

[0115] First nuclear phase device:

[0116] like Figure 4 As shown, a phase-checking device for a distribution network includes a phase-checking collector, a communication unit and a phase-checking controller. The phase-checking collector is a collector, the phase-checking controller is a controller, and the phase-checking collector includes a first phase-checking collector and a second phase-checking collector.

[0117] The first phase check collector is wirelessly connected to and communicates with the communication unit of the phase check device. The second phase check collector is wirelessly connected to and communicates with the communication unit of the phase check device. The first phase check collector is used to obtain the phase sequence of the AC voltage signal on the line before maintenance and transmit it to the phase check controller. The second phase check collector is used to obtain the phase sequence of the simulated AC voltage signal on the line and transmit it to the phase check controller. The communication transmission unit of the phase check collector is wirelessly connected to and communicates with the communication unit of the phase check device.

[0118] The phase checking device's communication unit is electrically connected to and communicates with the phase checking controller. The phase checking controller is used to obtain the phase sequence sent by the phase checking collector, compare the phase sequence of the AC voltage signal before maintenance with the phase sequence of the simulated AC voltage signal, obtain phase checking results, and share them. The analog-to-digital conversion unit of the phase checking controller is electrically connected to the communication unit of the phase checking device.

[0119] Second nuclear phase device:

[0120] like Figure 5 As shown, a phase checking device for a power distribution network includes a first phase checking device, and a phase checking controller of the phase checking device also includes a first acquisition button, a second acquisition button and a phase checking button, the first acquisition button is electrically connected to the control end of the processor of the phase checking controller, the second acquisition button is electrically connected to the control end of the processor of the phase checking controller, and the phase checking button is electrically connected to the control end of the processor of the phase checking controller.

[0121] By pressing the first acquisition button, the staff member transmits the first acquisition instruction to the processor of the phase controller. The processor receives the first acquisition instruction and obtains the phase sequence of the pre-maintenance AC voltage signal on the line sent by the phase collector. By pressing the second acquisition button, the staff member transmits the second acquisition instruction to the processor of the phase controller. The processor receives the second acquisition instruction and obtains the phase sequence of the simulated AC voltage signal on the line sent by the phase collector. By pressing the phase verification button, the staff member transmits the phase verification instruction to the processor of the phase controller. The processor receives the phase verification instruction and compares the phase sequence of the pre-maintenance AC voltage signal with the phase sequence of the simulated AC voltage signal, obtains the phase verification result, and shares it.

[0122] The third nuclear phase device:

[0123] like Figure 6 As shown, a phase-checking device for a power distribution network includes a first phase-checking device, and the phase-checking controller of the phase-checking device also includes a touch unit, which is electrically connected to the processor of the phase-checking controller. The touch unit itself and the corresponding communication connection technology are existing technologies and will not be described in detail.

[0124] Compared with the above embodiment, the phase controller of the phase control device can also be connected to and communicate with the phase sequence controller, and can be remotely operated by receiving working instructions from the phase sequence controller. Similarities are not repeated here.

[0125] Fourth nuclear phase device:

[0126] like Figure 7 As shown, a phase checking device for a power distribution network includes a first phase checking device and a display unit configured to obtain and display phase checking results shared by a phase checking controller. The phase checking controller is connected to and communicates with the display unit. The display unit is a liquid crystal display (LCD). The phase checking controller is electrically connected to and communicates with the LCD. The LCD displays the phase checking results shared and transmitted by the phase checking controller, allowing maintenance personnel to promptly receive information on correct or incorrect phase checking results.

[0127] Compared with the above embodiment, the display is an indicator light group or an LED display.

[0128] Compared with the above embodiment, the expresser is a voice player, the phase comparison controller is connected to the voice player by wire, and the voice player obtains the phase comparison result shared and sent by the phase comparison controller and broadcasts it.

[0129] Compared with the above embodiment, the expressor is a fixed terminal, such as a desktop computer. The phase analysis controller is connected to the desktop computer by wire and communicates with the desktop computer. The desktop computer obtains the phase analysis results shared and sent by the phase analysis controller and displays them.

[0130] Compared with the above embodiment, the expressor is a mobile terminal, such as a handheld terminal. The phase controller is wirelessly connected and communicates with the handheld terminal. The handheld terminal obtains the phase results shared and sent by the phase controller and displays and broadcasts them.

[0131] Fifth nuclear phase device:

[0132] A phase checking device for a power distribution network comprises a phase checking module, adopts simulation technology, and is connected to a collector and a computer simulation device through a collector and a computer simulation device.

[0133] The phase check module is a program module used to obtain the phase sequence of the AC voltage signal on the line before maintenance, obtain the phase sequence of the simulated AC voltage signal on the line, compare the phase sequence of the AC voltage signal before maintenance with the phase sequence of the simulated AC voltage signal, obtain the phase check results and share them.

[0134] First nuclear phase system:

[0135] like Figure 8 As shown, a phase checking system for a distribution network includes a first phase sequence generating device, a first phase checking device and a handheld terminal as well as a control module, a first phase sequence generating module and a first phase checking module. The first phase sequence generating device is installed on the first node of the maintenance task, that is, the substation side to be maintained, and the first phase checking device is installed on the second node of the maintenance task, that is, the switch side that needs phase checking. The maintenance personnel carry a handheld terminal, and the first phase sequence generating device, the first phase checking device and the handheld terminal are interconnected.

[0136] like Figure 8 As shown, the first phase sequence generating device includes a phase sequence collector, a communication unit, a phase sequence controller and a generator. The analog-to-digital conversion unit of the phase sequence controller is electrically connected to the communication unit of the phase sequence generating device, the communication sending unit of the phase sequence collector is wirelessly connected and communicates with the communication unit of the phase sequence generating device, and the communication unit of the phase sequence generating device is wirelessly connected and communicates with the generator.

[0137] like Figure 8 As shown, the first nuclear phase device includes a first nuclear phase collector, a second nuclear phase collector, a communication unit and a nuclear phase controller. The communication sending unit of the first nuclear phase collector is wirelessly connected to and communicates with the communication unit of the nuclear phase device, the communication sending unit of the second nuclear phase collector is wirelessly connected to and communicates with the communication unit of the nuclear phase device, and the analog-to-digital conversion unit of the nuclear phase controller is electrically connected to the communication unit of the nuclear phase device.

[0138] like Figure 8 As shown, the communication unit of the first phase sequence generating device is wirelessly connected and communicated with the communication unit of the first phase core device, and the handheld terminal is wirelessly connected and communicated with the communication unit of the first phase sequence generating device.

[0139] The control module is a program module running on the handheld terminal. When the handheld terminal receives a maintenance instruction issued by the operation and maintenance personnel, the handheld terminal sends the maintenance instruction to the phase sequence controller and the nuclear phase controller respectively; when the handheld terminal receives a simulation instruction issued by the operation and maintenance personnel, the handheld terminal sends the simulation instruction to the phase sequence controller and the nuclear phase controller respectively.

[0140] The first phase sequence generating module is a program module running on the phase sequence controller, which is used by the phase sequence collector to obtain the phase sequence of the AC voltage signal before maintenance on the substation side line and send it to the communication unit of the phase sequence generating device. When the phase sequence controller obtains the maintenance instruction sent from the outside through the communication unit of the phase sequence generating device, the phase sequence controller obtains the phase sequence of the AC voltage signal before maintenance sent by the phase sequence collector through the communication unit of the phase sequence generating device. When the phase sequence controller obtains the analog instruction sent from the outside through the communication unit of the phase sequence generating device, the phase sequence controller sends the phase sequence of the AC voltage signal before maintenance to the generator through the communication unit of the phase sequence generating device. The generator obtains the phase sequence of the AC voltage signal before maintenance sent by the phase sequence controller and uses it as the specified phase sequence, and generates an analog AC voltage signal with a consistent phase sequence according to the specified phase sequence. The analog AC voltage signal is sent to the switch to be checked, that is, the switch that needs phase checking, via the line after maintenance.

[0141] The first phase check module is a program module running on the phase check controller, which is used by the first phase check collector to obtain the phase sequence of the AC voltage signal on the switch side line before maintenance and send it to the phase check controller. When the phase check controller obtains the maintenance instruction sent by the handheld terminal through the communication unit of the phase check device, the phase check controller obtains the phase sequence of the AC voltage signal before maintenance sent by the communication sending unit of the first phase check collector through the communication unit of the phase check device; when the phase check controller obtains the simulation instruction sent by the handheld terminal through the communication unit of the phase check device, the phase check controller obtains the phase sequence of the simulated AC voltage signal on the line sent by the communication sending unit of the second phase check collector through the communication unit of the phase check device. The phase check controller compares the phase sequence of the AC voltage signal before maintenance with the phase sequence of the simulated AC voltage signal, obtains the phase check result and shares it for transmission.

[0142] Second nuclear phase system:

[0143] like Figure 9 As shown, a phase checking system for a distribution network includes a second phase sequence generating device and a second phase checking device as well as a second phase sequence generating module and a second phase checking module. The second phase sequence generating device is installed on the first node of the maintenance task, that is, the substation side to be maintained, and the second phase checking device is installed on the second node of the maintenance task, that is, the switch side that needs phase checking.

[0144] like Figure 9As shown, the second phase sequence generation device includes a phase sequence collector, a communication unit, a phase sequence controller, and a generator. The analog-to-digital conversion unit of the phase sequence controller is electrically connected to the communication unit of the phase sequence generation device. The communication transmission unit of the phase sequence collector is wirelessly connected to and communicates with the communication unit of the phase sequence generation device. The communication unit of the phase sequence generation device is wirelessly connected to and communicates with the generator. The phase sequence controller of the phase sequence generation device also includes a collection button and a simulation button. The collection button is electrically connected to the control terminal of the processor of the phase sequence controller, and the simulation button is electrically connected to the control terminal of the processor of the phase sequence controller.

[0145] like Figure 9 As shown, the second phase-checking device includes a first phase-checking collector, a second phase-checking collector, a communication unit, and a phase-checking controller. The communication sending unit of the first phase-checking collector is wirelessly connected to and communicates with the communication unit of the phase-checking device. The communication sending unit of the second phase-checking collector is wirelessly connected to and communicates with the communication unit of the phase-checking device. The analog-to-digital conversion unit of the phase-checking controller is electrically connected to the communication unit of the phase-checking device. The phase-checking controller of the second phase-checking device also includes a first acquisition button, a second acquisition button, and a phase-checking button. The first acquisition button is electrically connected to the control terminal of the processor of the phase-checking controller. The second acquisition button is electrically connected to the control terminal of the processor of the phase-checking controller. The phase-checking button is electrically connected to the control terminal of the processor of the phase-checking controller.

[0146] The second phase sequence generating module is a program module running on the phase sequence controller, which is used by the phase sequence collector to obtain the phase sequence of the AC voltage signal before maintenance on the substation side line and send it to the communication unit of the phase sequence generating device. When the phase sequence controller obtains the collection instruction issued by the maintenance personnel through the collection button, the phase sequence controller obtains the phase sequence of the AC voltage signal before maintenance sent by the phase sequence collector through the communication unit of the phase sequence generating device. When the phase sequence controller obtains the simulation instruction issued by the maintenance personnel through the simulation button, the phase sequence controller sends the phase sequence of the AC voltage signal before maintenance to the generator through the communication unit of the phase sequence generating device. The generator obtains the phase sequence of the AC voltage signal before maintenance sent by the phase sequence controller and uses it as the specified phase sequence, and generates a simulated AC voltage signal with the same phase sequence according to the specified phase sequence. The simulated AC voltage signal is sent to the switch to be checked via the line after maintenance, that is, the switch that needs phase checking.

[0147] The second phase check module is a program module running on the phase check controller, which is used by the first phase check collector to obtain the phase sequence of the AC voltage signal on the switch side line before maintenance and send it to the phase check controller. When the phase check controller obtains the first collection instruction issued by the maintenance personnel through the first collection button, the phase check controller obtains the phase sequence of the AC voltage signal before maintenance sent by the communication sending unit of the first phase check collector through the communication unit of the phase check device; when the phase check controller obtains the second collection instruction issued by the maintenance personnel through the second collection button, the phase check controller obtains the phase sequence of the analog AC voltage signal on the line sent by the communication sending unit of the second phase check collector through the communication unit of the phase check device. When the phase check controller obtains the phase check instruction issued by the maintenance personnel through the phase check button, the phase check controller compares the phase sequence of the AC voltage signal before maintenance with the phase sequence of the analog AC voltage signal, obtains the phase check result and shares it for transmission.

[0148] The third nuclear phase system:

[0149] like Figure 10 As shown, a phase checking system for a distribution network includes a third phase sequence generating device and a third phase checking device as well as a third phase sequence generating module and a third phase checking module. The third phase sequence generating device is installed on the first node of the maintenance task, that is, the substation side to be maintained, and the third phase checking device is installed on the second node of the maintenance task, that is, the switch side that needs phase checking.

[0150] like Figure 10 As shown, the third phase sequence generation device includes a phase sequence collector, a communication unit, a phase sequence controller, and a generator. The analog-to-digital conversion unit of the phase sequence controller is electrically connected to the communication unit of the phase sequence generation device. The communication transmission unit of the phase sequence collector is wirelessly connected to and communicates with the communication unit of the phase sequence generation device. The communication unit of the phase sequence generation device is wirelessly connected to and communicates with the generator. The phase sequence controller of the phase sequence generation device also includes a touch control unit, which is a touch screen and is electrically connected to and communicates with the processor of the phase sequence controller.

[0151] like Figure 10 As shown, the third phase-checking device includes a first phase-checking collector, a second phase-checking collector, a communication unit, and a phase-checking controller. The communication transmission unit of the first phase-checking collector is wirelessly connected to and communicates with the communication unit of the phase-checking device. The communication transmission unit of the second phase-checking collector is wirelessly connected to and communicates with the communication unit of the phase-checking device. The analog-to-digital conversion unit of the phase-checking controller is electrically connected to the communication unit of the phase-checking device. The phase-checking controller of the phase-checking device also includes a touch control unit, which is a touch screen and is electrically connected to and communicates with the processor of the phase-checking controller.

[0152] like Figure 10 As shown, the communication unit of the third phase sequence generating device is wiredly connected to and communicates with the communication unit of the third phase nucleation device.

[0153] The third phase sequence generation module is a program module running on the phase sequence controller, which is used for the phase sequence collector to obtain the phase sequence of the AC voltage signal before maintenance on the substation side line and send it to the communication unit of the phase sequence generation device. When the phase sequence controller obtains the collection instruction issued by the maintenance personnel through the touch screen, the phase sequence controller sends the collection instruction to the phase verification device through the communication unit of the phase sequence generation device. The phase sequence controller obtains the phase sequence of the AC voltage signal before maintenance sent by the phase sequence collector through the communication unit of the phase sequence generation device. When the phase sequence controller obtains the analog instruction issued by the maintenance personnel through the touch screen, the phase sequence controller sends the collection instruction to the phase verification device through the phase sequence generation device. The communication unit of the generating device sends the simulation instruction to the phase checking device, and the phase sequence controller sends the phase sequence of the AC voltage signal before maintenance to the generator through the communication unit of the phase sequence generating device. The generator obtains the phase sequence of the AC voltage signal before maintenance sent by the phase sequence controller and uses it as the specified phase sequence, and generates a simulated AC voltage signal with the same phase sequence according to the specified phase sequence. The simulated AC voltage signal is sent to the switch to be checked via the line after maintenance, that is, the switch that needs phase checking; when the phase sequence controller obtains the phase checking result shared and sent by the phase checking device through the communication unit of the phase sequence generating device, the touch screen of the phase sequence controller displays the phase checking result.

[0154] The third phase check module is a program module running on the phase check controller, which is used by the first phase check collector to obtain the phase sequence of the AC voltage signal on the switch side line before maintenance and send it to the phase check controller. When the phase check controller obtains the collection instruction sent by the phase sequence generating device through the communication unit of the phase check device, the phase check controller obtains the phase sequence of the AC voltage signal before maintenance sent by the communication sending unit of the first phase check collector through the communication unit of the phase check device; when the phase check controller obtains the simulation instruction sent by the phase sequence generating device through the communication unit of the phase check device, the phase check controller obtains the phase sequence of the simulated AC voltage signal on the line sent by the communication sending unit of the second phase check collector through the communication unit of the phase check device. The phase check controller compares the phase sequence of the AC voltage signal before maintenance with the phase sequence of the simulated AC voltage signal, obtains the phase check result and shares it, and the touch screen of the phase check controller displays the phase check result.

[0155] Brief introduction of this technology research and development project:

[0156] The technical achievements of this project include two types of hardware products: a phase sequence generator and a phase detection device. Multiple technical solutions were designed for each hardware product. The phase sequence generator and the phase detection device comprise a phase detection system, and different combinations of these devices can form multiple phase detection systems. The core technologies are described below.

[0157] Phase sequence generating device:

[0158] The phase sequence generating device includes a phase sequence collector, a communication unit, a phase sequence controller and a generator. The phase sequence collector is connected to and communicates with the communication unit of the phase sequence generating device. The communication unit of the phase sequence generating device is connected to and communicates with the phase sequence controller. The communication unit of the phase sequence generating device is connected to and communicates with the generator. The phase sequence collector is used to obtain the phase sequence of the AC voltage signal on the line before maintenance and send it to the phase sequence controller. The phase sequence controller is used to obtain the phase sequence sent by the phase sequence collector and send it to the generator. The generator is used to obtain the phase sequence sent by the phase sequence controller and use it as the specified phase sequence to generate an analog AC voltage signal with a consistent phase sequence according to the specified phase sequence. The phase sequence generating device is used to obtain the phase sequence of the AC voltage signal on the line before maintenance and generate an analog AC voltage signal with a consistent phase sequence. The analog AC voltage signal is a reference signal for phase verification. Among them, the phase sequence collector is a collector and the phase sequence controller is a controller. The generator itself belongs to the existing technology and will not be described in detail. The analog-to-digital conversion unit of the phase sequence controller is electrically connected to the communication unit of the phase sequence generating device, the communication sending unit of the phase sequence collector is wirelessly connected and communicates with the communication unit of the phase sequence generating device, and the communication unit of the phase sequence generating device is wirelessly connected and communicates with the generator.

[0159] In addition, the phase sequence controller of the phase sequence generating device may further include a collection button and a simulation button. The collection button is electrically connected to the control end of the processor of the phase sequence controller, and the simulation button is electrically connected to the control end of the processor of the phase sequence controller. By pressing the collection button, the staff informs the processor of the phase sequence controller of the collection instruction. The processor of the phase sequence controller obtains the collection instruction, and the processor of the phase sequence controller obtains the phase sequence sent by the phase sequence collector and uses it as the designated phase sequence. By pressing the simulation button, the staff informs the processor of the phase sequence controller of the simulation instruction. The processor of the phase sequence controller obtains the simulation instruction, and the processor of the phase sequence controller sends the designated phase sequence to the generator. The generator obtains the designated phase sequence and generates a simulated AC voltage signal with a consistent phase sequence according to the designated phase sequence.

[0160] In addition, the phase sequence controller of the phase sequence generating device may further include a touch unit, which is electrically connected to the control end of the processor of the phase sequence controller. The staff informs the processor of the phase sequence controller of the acquisition instruction through the touch unit, and the processor of the phase sequence controller obtains the acquisition instruction. The processor of the phase sequence controller obtains the phase sequence sent by the phase sequence collector and uses it as the designated phase sequence. The staff informs the processor of the phase sequence controller of the simulation instruction through the touch unit, and the processor of the phase sequence controller obtains the simulation instruction. The processor of the phase sequence controller sends the designated phase sequence to the generator, and the generator obtains the designated phase sequence and generates an analog AC voltage signal with a consistent phase sequence according to the designated phase sequence. The touch unit is a touch screen or a key assembly with a display. The touch unit itself and the corresponding communication connection technology are existing technologies and will not be described in detail.

[0161] In addition, the phase sequence controller of the phase sequence generator can also connect and communicate with other external controllers, and can be remotely operated by receiving working instructions from other controllers. Other controllers send acquisition instructions to the processor of the phase sequence controller, which receives the acquisition instructions. The processor of the phase sequence controller receives the phase sequence sent by the phase sequence collector and uses it as the designated phase sequence. Other controllers send simulation instructions to the processor of the phase sequence controller, which receives the simulation instructions. The processor of the phase sequence controller sends the designated phase sequence to the generator, which receives the designated phase sequence and generates an analog AC voltage signal with a consistent phase sequence based on the designated phase sequence.

[0162] The phase sequence controller of the phase sequence generating device is connected to other external controllers by wire. In addition, the phase sequence controller of the phase sequence generating device can also be connected to other external controllers by wireless.

[0163] In addition, the communication sending unit of the phase sequence collector and the communication unit of the phase sequence generating device may be connected by wire, and the communication unit of the phase sequence generating device and the generator may be connected by wire.

[0164] In addition, a signal analyzer can be used to obtain the phase sequence of the AC voltage signal on the line before maintenance, and the phase sequence of the simulated AC voltage signal on the line. The phase sequence of the AC voltage signal before maintenance and the phase sequence of the simulated AC voltage signal can be compared to obtain the phase verification result.

[0165] The invention of the phase sequence generating device is as follows:

[0166] 1. Combination invention: The combination of the phase sequence collector, the communication unit, the phase sequence controller and the generator is proposed for the first time. The phase sequence collector, the communication unit, the phase sequence controller and the generator themselves and the corresponding communication connection technology are existing technologies and will not be described in detail.

[0167] 2. Application of the invention: The phase sequence of the AC voltage signal before maintenance on the line is obtained and used to generate an analog AC voltage signal with the same phase sequence, and the analog AC voltage signal is used as a reference signal for phase verification so as to facilitate the next step of phase verification.

[0168] Nuclear phase device:

[0169] The phase verification device includes a phase verification collector, a communication unit, and a phase verification controller. The phase verification collector is connected to and communicates with the communication unit of the phase verification device, which is in turn connected to and communicates with the phase verification controller. The phase verification collector is used to obtain the phase sequence of the AC voltage signal on the line before maintenance and send it to the phase verification controller. The phase verification collector is also used to obtain the phase sequence of the simulated AC voltage signal on the line and send it to the phase verification controller. The phase verification controller is used to obtain the phase sequence sent by the phase verification collector, compare the phase sequence of the AC voltage signal before maintenance with the phase sequence of the simulated AC voltage signal, and obtain the phase verification result. The phase verification device is used to obtain the phase sequence of the AC voltage signal on the line before maintenance, obtain the phase sequence of the simulated AC voltage signal on the line, and compare the phase sequence of the AC voltage signal before maintenance with the phase sequence of the simulated AC voltage signal to obtain the phase verification result. The phase verification collector is the collector, and the phase verification controller is the controller.

[0170] In addition, the phase check collector includes a first phase check collector and a second phase check collector. The first phase check collector is connected to and communicates with the communication unit of the phase check device, and the second phase check collector is connected to and communicates with the communication unit of the phase check device. The first phase check collector is used to obtain the phase sequence of the AC voltage signal on the line before maintenance and transmit it to the phase check controller, and the second phase check collector is used to obtain the phase sequence of the analog AC voltage signal on the line and transmit it to the phase check controller. The analog-to-digital conversion unit of the phase check controller is electrically connected to the communication unit of the phase check device, and the communication transmission unit of the phase check collector is wirelessly connected to and communicates with the communication unit of the phase check device.

[0171] In addition, the phase checking controller of the phase checking device may further include a first collection button, a second collection button, and a phase checking button. The first collection button is electrically connected to a control terminal of the processor of the phase checking controller, the second collection button is electrically connected to a control terminal of the processor of the phase checking controller, and the phase checking button is electrically connected to a control terminal of the processor of the phase checking controller. A staff member presses the first collection button to transmit a first collection instruction to the processor of the phase checking controller. The processor of the phase checking controller receives the first collection instruction and obtains the phase sequence of the pre-maintenance AC voltage signal on the line sent by the phase checking collector. A staff member presses the second collection button to transmit a second collection instruction to the processor of the phase checking controller. The processor of the phase checking controller receives the second collection instruction and obtains the phase sequence of the simulated AC voltage signal on the line sent by the phase checking collector. A staff member presses the phase checking button to transmit a phase checking instruction to the processor of the phase checking controller. The processor of the phase checking controller receives the phase checking instruction and compares the phase sequence of the pre-maintenance AC voltage signal with the phase sequence of the simulated AC voltage signal to obtain a phase checking result.

[0172] In addition, the core phase controller of the core phase device may further include a touch unit, which is electrically connected to the control end of the processor of the core phase controller. The touch unit itself and the corresponding communication connection technology are existing technologies and will not be described in detail.

[0173] In addition, the nuclear phase controller of the nuclear phase device can also be connected to and communicate with other external controllers, and remotely controlled by receiving working instructions from other controllers. Similarities will not be repeated here.

[0174] In addition, the communication sending unit of the nuclear phase collector and the communication unit of the nuclear phase device can also be connected by wire.

[0175] The invention of the nuclear phase device is:

[0176] 1. Combination invention: The combination of the first core phase collector, the second first core phase collector, the communication unit and the core phase controller is proposed for the first time. The core phase collector, the communication unit and the core phase controller themselves and the corresponding communication connection technology are existing technologies and will not be described in detail.

[0177] 2. Method invention: obtain the phase sequence of the AC voltage signal on the line before maintenance, obtain the phase sequence of the simulated AC voltage signal on the line, compare the phase sequence of the AC voltage signal before maintenance with the phase sequence of the simulated AC voltage signal, and obtain the phase verification result.

[0178] The concept of this application:

[0179] In the existing technology, before large-scale comprehensive inspection and fault recovery of distribution lines, phase verification is carried out on both sides of the switch using a wireless phase verification instrument. If the phase verification result is incorrect, it is necessary to repeatedly shut down the power supply to perform phase change of the distribution line.

[0180] The inventor's idea is that if the phase of the distribution line can be recorded before the power outage, after the maintenance work is completed, before the power is put into operation, the temporarily stored distribution line phase can be reloaded on the distribution line to perform phase verification work. In this way, repeated power outages can be avoided and the safety hazards caused by repeated power outages can be relatively reduced. The specific phase verification steps are: if the phase is correct, a live secondary phase verification can be performed before operation; if the phase is incorrect, a phase change work is performed, and a live secondary phase verification is also performed before operation. The core of the above work is how to perform phase verification work under non-energized working conditions.

[0181] Technical problems to be solved:

[0182] Phase verification work during distribution network operation and maintenance power outage.

[0183] Technical Contributions:

[0184] Before large-scale power outages and comprehensive maintenance, or large-scale power outages due to complex faults, this device collects the phase sequence signals of the 10kV substation outlet busbars and temporarily stores them in the generator memory module B. At the same time, before the power outage, it collects the phase sequence of the positions that need to be checked before power is delivered, and temporarily stores them in the generator memory module A. The phase check positions can be one or more positions.

[0185] After the work is completed and before power is supplied, the phase sequence signal in the memory module B is converted into an electrical signal using a phase generator and added to the head end of the distribution line, that is, the location of the 10kV substation outlet interval busbar. The phase sequence signal at the location where the line needs phase verification is collected and temporarily stored in the generator memory module A. The phase sequences collected twice before and after in the memory module A are compared, and the phase verification work is completed within the time range of the power outage, thereby reducing the phase change work that requires repeated power outages due to phase sequence errors caused by human errors.

[0186] Of course, before supplying power, it is still necessary to re-energize and check the phases at the switch position as the last safety guarantee barrier.

[0187] Technical solution description:

[0188] The technical solution of the present application relates to the technical fields of distribution network operation and maintenance and wireless phase checking.

[0189] like Figure 12 As shown, a 10kV substation undergoes a power outage for maintenance work. The outage covers the area from the substation outlet to the line switch A. The line below switch A is switched to another 10kV line. Tie switch A0 is in the closed position, and switch A is in the open position. During work within the outage protection range, human factors such as disconnecting distribution lines and replacing switches can cause the phase on the left side of switch A to deviate from the original phase within the station before the outage. Human factors can cause this to happen. After the work within the outage protection range is completed, the 10kV substation switches are closed, and the area from the substation outlet to the left side of switch A is energized. According to existing technology, live phase verification should be performed on both sides of switch A. If the phases on both sides of the pole switch A are consistent, the power supply is completed. If the phases are inconsistent, the station outlet switch needs to be reopened. After the power outage, the corresponding protective measures are taken and the phase change work is performed at the distribution line connection on the left side of the switch A. After the phase change work is completed, the station outlet switch is closed again and the phase check work is performed again on both sides of the pole switch A. This process increases the power outage time and also increases the labor cost.

[0190] like Figure 11 As shown, the inventors have found a technical idea and proposed a new type of intelligent phase storage generator, which is equipped with at least two or more groups of devices that also have acquisition and transmission functions.

[0191] like Figure 11 As shown, the phase sequence signal of a 10kV line is collected and stored internally in the instrument. Switch A is collected both times to the left of switch A. This phase sequence signal is a strong-current-weak-current sinusoidal wave, with the left side of switch A indicating the power transmission direction. The phase sequence signal of a 10kV line is collected and stored internally in the instrument. This phase sequence signal is a strong-current-weak-current sinusoidal wave. The stored signal is converted into a set of sinusoidal signals with phase characteristics, which is a weak-current-weak-current sinusoidal wave-strong-current sinusoidal wave.

[0192] like Figure 12 As shown, after opening pole switch A and before opening the station switch or before a power outage for maintenance, the phase sequence signal of pole switch A is collected first. After opening pole switch A and before opening the station switch, pole switch A is open, with both sides energized. Before the power outage for maintenance, pole switch A is closed, with both sides energized. The phase sequence signal of pole switch A, i.e., the phase sequence signal on the side within the power outage range, is collected first. The signals are collected in the actual on-site order of yellow, green, and red. This signal is a three-phase sinusoidal signal with a phase angle difference of 120°.

[0193] like Figure 12 As shown, the data is temporarily stored in storage area 1 of generator memory module A. The phase sequence signal on the outgoing side of the 10kV substation bus bay is then collected and temporarily stored in generator memory module B. This phase sequence signal is collected in the actual on-site sequence of yellow, green, and red. The signal is a three-phase sinusoidal signal with a phase angle difference of 120°.

[0194] like Figure 12 As shown, after the work is completed and before commissioning, the phase sequence signal in the memory module B is converted and added to the distribution line at the outlet of the distribution line, that is, the original collection position. The phase sequence signal at this time is collected on the left side of the pole switch A and temporarily stored in the storage area 2 of the generator memory module A. The two phase sequences before and after in the memory module A are compared to complete the phase check work during the power outage process to ensure that the phases on both sides of the pole switch A are accurate at this time. After the above process is completed, repeated power outages in the substation can be effectively avoided, saving time and labor costs, and avoiding some unnecessary safety issues.

[0195] like Figure 12 As shown, the 10kV line phase sequence signal is collected and stored within the instrument. This signal is a strong-current-weak-current sine wave. The stored signal is converted into a set of sine wave signals with phase characteristics. This signal is a weak-current sine wave-strong-current sine wave. The signal generated by phase temporary generator B is collected. This signal is a strong-current sine wave-weak-current sine wave.

[0196] In order to further ensure safety, the secondary phase must be energized before power is supplied.

[0197] Among them, the phase sequence signal acquisition component can adopt the basic communication component of a similar wireless phase detector, except that storage components and transmitting components are added to the original components. Each set of intelligent phase temporary storage generators consists of two temporary storage generators that also have acquisition and transmission functions.

[0198] After this application has been running internally for a period of time, on-site technicians have reported that it is beneficial in the following ways:

[0199] During large-scale power outage comprehensive maintenance and large-scale power outages caused by complex faults, the phase-changing work that requires repeated power outages due to phase sequence errors caused by human errors can be reduced, effectively reducing labor and electricity costs.

[0200] At present, the technical solution of the present invention has been put into pilot production, that is, a smaller-scale test of the product before large-scale mass production; after the pilot production was completed, a user usage survey was carried out on a small scale, and the survey results showed that user satisfaction was high; now preparations have begun for the formal production and industrialization of the product (including intellectual property risk warning surveys).

Claims

1. A phase sequence generation method for a power distribution network, characterized by: The method includes a phase sequence generation step, wherein a phase sequence generation device obtains the phase sequence of the AC voltage signal on the line before maintenance at a first node and uses it as a designated phase sequence, and a signal analyzer obtains the phase sequence of the AC voltage signal on the line before maintenance at a second node; after the maintenance is completed, during phase verification, the phase sequence generation device generates an analog AC voltage signal with a consistent phase sequence according to the designated phase sequence and sends it to the second node via the repaired line; the signal analyzer obtains the phase sequence of the analog AC voltage signal on the line at the second node, compares the phase sequence of the AC voltage signal before maintenance with the phase sequence of the analog AC voltage signal, and obtains a phase verification result.

2. A phase sequence generating device for a power distribution network, used in the phase sequence generating method for a power distribution network according to claim 1, characterized in that: It includes a phase sequence generating module, which is used to obtain the phase sequence of the AC voltage signal before maintenance and generate an analog AC voltage signal that is consistent with the phase sequence of the AC voltage signal before maintenance.

3. A phase sequence generating device for a power distribution network according to claim 2, characterized in that: The phase sequence generation module includes a phase sequence collector, a communication unit, a phase sequence controller and a generator. The phase sequence collector is connected to and communicates with the communication unit of the phase sequence generating device, the communication unit of the phase sequence generating device is connected to and communicates with the phase sequence controller, and the communication unit of the phase sequence generating device is connected to and communicates with the generator. The phase sequence collector is used to obtain the phase sequence of the AC voltage signal on the line before maintenance and send it to the phase sequence controller. The phase sequence controller is used to obtain the phase sequence sent by the phase sequence collector and send it to the generator. The generator is used to obtain the phase sequence sent by the phase sequence controller and generate an analog AC voltage signal with a consistent phase sequence.

4. A phase sequence generating device for a power distribution network according to claim 3, characterized in that: The phase sequence generation module also includes a phase sequence generation program module, which is used for the phase sequence collector to obtain the phase sequence of the AC voltage signal before maintenance and send it to the phase sequence controller, the phase sequence controller to obtain the phase sequence of the AC voltage signal before maintenance and send it to the generator, and the generator to obtain the phase sequence of the AC voltage signal before maintenance and generate an analog AC voltage signal with a consistent phase sequence.

5. A phase sequence generating device for a power distribution network according to claim 4, characterized in that: The phase sequence generation program module is also used when the phase sequence controller obtains the phase verification result sent from the outside, and the phase sequence controller displays the phase verification result through the expressor.

6. A phase sequence generating device for a power distribution network according to claim 4, characterized in that: The phase sequence generation program module is also used to enable the phase sequence controller to obtain the phase sequence of the AC voltage signal before maintenance when the phase sequence controller obtains the first working instruction, and to allow the phase sequence controller to generate an analog AC voltage signal when the phase sequence controller obtains the second working instruction.

7. A phase sequence generating device for a power distribution network according to claim 6, characterized in that: The phase sequence generation program module is a first phase sequence generation module, which is used when the phase sequence controller obtains the maintenance instruction sent by the handheld terminal, the phase sequence controller obtains the phase sequence of the AC voltage signal before maintenance sent by the phase sequence collector, and when the phase sequence controller obtains the analog instruction sent by the handheld terminal, the phase sequence controller sends the phase sequence of the AC voltage signal before maintenance to the generator; or the phase sequence generation program module is a second phase sequence generation module, which is used when the phase sequence controller obtains the collection instruction issued by the maintenance personnel through the collection button, the phase sequence controller obtains the phase sequence of the AC voltage signal before maintenance sent by the phase sequence collector, and when the phase sequence controller The controller obtains the simulation instruction issued by the maintenance personnel through the simulation button, and the phase sequence controller sends the phase sequence of the AC voltage signal before maintenance to the generator; or the phase sequence generation program module is a third phase sequence generation module, which is used when the phase sequence controller obtains the collection instruction issued by the maintenance personnel through the touch screen, the phase sequence controller sends the collection instruction to the outside, and the phase sequence controller obtains the phase sequence of the AC voltage signal before maintenance. When the phase sequence controller obtains the simulation instruction issued by the maintenance personnel through the touch screen, the phase sequence controller sends the simulation instruction to the outside, and the phase sequence controller sends the phase sequence of the AC voltage signal before maintenance to the generator.

8. The phase sequence generating device for a power distribution network according to claim 3, characterized in that: The phase sequence controller includes an acquisition button and a simulation button, the acquisition button is electrically connected to the phase sequence controller, and the simulation button is electrically connected to the phase sequence controller; or the phase sequence controller includes a touch unit, and the touch unit is electrically connected to the phase sequence controller.

Images