Line sequence detection method and device

Abstract

This disclosure relates to a wiring sequence detection method and apparatus. The wiring sequence detection method includes: applying DC voltage signals to the first ends of a plurality of cables to be tested; and determining whether the wiring sequence of the plurality of cables is correct based on the polarity of the voltage sensed between the second ends of each group of adjacent cables. By adopting this disclosure, the wiring sequence of connected and installed power cables can be directly measured without the need for additional cables, and is not limited by the distance between the two ends of the cables. It can quickly and intuitively detect whether the phase sequence of the cables is correct even when AC power is not connected, improving the quality of factory inspection, reducing manual workload, and solving the problem of inconvenience in manual inspection.

Description

Technical Field

[0001] This disclosure relates to the field of wind power generation technology, and more specifically, to a line sequence detection method and apparatus. Background Technology

[0002] With the increasing capacity of wind turbine generators, variable pitch control and variable speed constant frequency technologies have become the mainstream control methods for wind turbine generators. Because wind energy is a low-density energy source with unstable and random characteristics, control technology is crucial for the safe and efficient operation of wind turbine generators. Therefore, developing generator systems and advanced control technologies suitable for wind power conversion, reliable operation, high efficiency, good control, and excellent power supply performance is key to wind power applications. Stable operation of wind turbine generators requires the auxiliary operation of various actuators (including gearboxes, heaters, cooling fans, cooling pumps, etc.). If any actuator malfunctions, the wind turbine generator may shut down or fail to start due to a triggered fault. Furthermore, insufficient factory testing may lead to malfunctions or even complete failure of the generator after installation on-site. Additionally, for special actuators (e.g., lubrication pumps), if the gear oil pump malfunctions, damage may occur due to insufficient lubrication of the rotating machinery.

[0003] Therefore, conducting factory inspections of the actuators' operation, especially the power supply lines, is a crucial measure to ensure product quality, improve wind turbine reliability, and reduce on-site commissioning and maintenance time. For wind turbine generator sets, the yaw system is one of its most important functional components. The nacelle of a large-capacity wind turbine generator set typically weighs tens of tons. Therefore, if a yaw motor fails to operate, it may affect the yaw load of the wind turbine generator set. Even in the event of a phase loss, overcurrent in the main circuit may cause the circuit breaker to trip, resulting in a loss of power generation. For example, during on-site commissioning, loose or disconnected wiring of a single yaw motor may occur, or the wiring sequence may be incorrect. Furthermore, wind turbine generator sets typically have multiple yaw motors (e.g., 6 to 9), and large-megawatt wind turbine generator sets may even have more than 10 (e.g., 17) yaw motors. Therefore, if a yaw motor has reversed wiring or is not connected, the number of normally rotating motors far exceeds the number of abnormally rotating (not rotating or rotating in the opposite direction) motors. This makes it difficult to detect the problem promptly and can cause significant damage to the motor, the yaw mechanism of the wind turbine generator, or the entire system. Furthermore, even if reversed wiring is discovered on-site, the operating environment and lack of specialized wire-pressing tools make it difficult to meet compliant wiring standards (compared to the assembly plant), potentially leading to other hidden dangers. Therefore, checking the phase sequence of the actuator's power cables during factory inspection is crucial and essential. Summary of the Invention

[0004] To address the aforementioned problems, this disclosure proposes a line sequence detection method and apparatus, a computing system, and a computer-readable storage medium.

[0005] According to one aspect of this disclosure, a wiring sequence detection method is provided, the wiring sequence detection method comprising: applying a DC voltage signal to a first end of a plurality of cables to be detected respectively; and determining whether the wiring sequence of the plurality of cables is correct based on the polarity of the voltage sensed between the second ends of each group of adjacent cables in the plurality of cables.

[0006] Optionally, the step of determining whether the wiring sequence of the plurality of cables is correct based on the polarity of the voltage sensed between the second ends of each group of adjacent cables in the plurality of cables includes: determining that the wiring sequence of the plurality of cables is correct in response to the fact that the polarity of the voltage sensed between the second ends of each group of adjacent cables in the plurality of cables is the same; and determining that the wiring sequence of the plurality of cables is incorrect in response to the fact that the polarity of the voltage sensed between the second ends of each group of adjacent cables in the plurality of cables is inconsistent.

[0007] Optionally, a light-emitting diode is used to indicate the polarity of the voltage sensed between the second ends of each set of adjacent cables in the plurality of cables.

[0008] Optionally, the plurality of cables are connected between the terminals of the yaw motor of the wind turbine generator set and the terminals of the nacelle cabinet, or between the terminals of the transmission chain test cabinet and the terminals of the gear oil pump.

[0009] Optionally, the amplitude of the DC voltage signal is determined based on the number of the plurality of cables.

[0010] Optionally, the line sequence detection method further includes: issuing an alarm in response to detecting a magnetic field generated by alternating current.

[0011] Optionally, the wiring sequence detection method further includes: sensing the brightness of a plurality of light-emitting diodes (LEDs) connected between the second ends of each group of adjacent cables in the plurality of cables; determining that an open circuit fault exists in the cable corresponding to the LED with zero brightness in response to at least one LED having zero brightness and the brightness of the remaining LEDs not exceeding a specific threshold; and determining that a short circuit fault exists in the cable corresponding to the LED with zero brightness in response to at least one LED having zero brightness and the brightness of the remaining LEDs exceeding a specific threshold.

[0012] According to another aspect of this disclosure, a wire sequence detection device is provided, the wire sequence detection device comprising: a power supply module for providing a DC voltage signal; a voltage comparison module for outputting voltages of different polarities according to the magnitude relationship of the voltage signals input thereto; and a controller configured to: control the power supply module to apply DC voltage signals to the first ends of a plurality of cables to be detected respectively; and determine whether the wire sequence of the plurality of cables is correct based on the polarity of the voltage sensed by the voltage comparison module between the second ends of each group of adjacent cables in the plurality of cables.

[0013] Optionally, the controller is further configured to: determine that the wiring sequence of the plurality of cables is correct in response to the fact that the polarity of the voltage sensed between the second ends of each group of adjacent cables in the plurality of cables is the same; and determine that the wiring sequence of the plurality of cables is incorrect in response to the fact that the polarity of the voltage sensed between the second ends of each group of adjacent cables in the plurality of cables is inconsistent.

[0014] Optionally, a light-emitting diode is used to indicate the polarity of the voltage sensed between the second ends of each set of adjacent cables in the plurality of cables.

[0015] Optionally, the plurality of cables are connected between the terminals of the yaw motor of the wind turbine generator set and the terminals of the nacelle cabinet, or between the terminals of the transmission chain test cabinet and the terminals of the gear oil pump.

[0016] Optionally, the controller is further configured to determine the amplitude of the DC voltage signal based on the number of the plurality of cables.

[0017] Optionally, the controller is further configured to issue an alarm in response to detecting a magnetic field generated by alternating current.

[0018] Optionally, the controller is further configured to: sense the brightness of a plurality of light-emitting diodes (LEDs) connected between the second ends of each group of adjacent cables in the plurality of cables; determine that an open circuit fault exists in the cable corresponding to the LED with zero brightness in response to at least one LED having zero brightness and the brightness of the remaining LEDs not exceeding a specific threshold; and determine that a short circuit fault exists in the cable corresponding to the LED with zero brightness in response to at least one LED having zero brightness and the brightness of the remaining LEDs exceeding a specific threshold.

[0019] According to another aspect of this disclosure, a computing system is provided that includes at least one computing device and at least one storage device for storing instructions, wherein the instructions, when executed by the at least one computing device, cause the at least one computing device to perform the thread sequence detection method as described above.

[0020] According to another aspect of this disclosure, a computer-readable storage medium for storing instructions is provided, wherein when the instructions are executed by at least one computing device, the at least one computing device causes the at least one computing device to perform the thread sequence detection method as described above.

[0021] By adopting this disclosure, the phase sequence of connected and installed power cables can be directly measured without the need for additional cables or the distance between the two ends of the cables. It can quickly and intuitively detect whether the phase sequence of the cables is correct even when AC power is not connected, thereby improving the quality of factory inspection, reducing manual workload, and solving the problem of inconvenience in manual inspection. Attached Figure Description

[0022] The above and / or other objects and advantages of this disclosure will become clearer from the following description of embodiments in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart illustrating a line sequence detection method according to an exemplary embodiment of the present disclosure; Figure 2 This is a schematic diagram illustrating a line sequence detection apparatus according to an exemplary embodiment of the present disclosure; Figure 3 This is a circuit diagram illustrating an example of a voltage detection module according to this disclosure; Figure 4 This is a circuit diagram showing the power supply module and voltage comparison module of a line sequence detection device according to an exemplary embodiment of the present disclosure; Figure 5A and Figure 5B This is a schematic diagram illustrating the operation of a line sequence detection apparatus according to an exemplary embodiment of the present disclosure; Figure 6 This is a schematic diagram illustrating an example of a line sequence detection device according to the present disclosure; Figure 7 This is a schematic diagram showing the wiring arrangement of the wiring sequence detection device according to this disclosure in a practical application scenario; Figure 8 This is a schematic diagram illustrating another example of a line sequence detection device according to the present disclosure; Figure 9 This is a schematic diagram illustrating another example of a line sequence detection device according to the present disclosure; Figure 10 This is a block diagram illustrating a computing system including at least one computing device and at least one storage device of storage instructions according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0023] The following description, in conjunction with the accompanying drawings, provides specific embodiments to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, upon understanding this disclosure, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but may be altered as will become clear upon understanding this disclosure, except for operations that must occur in a specific order. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0024] Currently, methods for detecting wiring sequence mainly include the phase difference method, multimeter method, wire disconnection test method, network tester test, and manual observation. The phase difference method is only applicable to rotating motors. However, during assembly at the final assembly plant, yaw is sometimes not permitted (i.e., the yaw motor cannot be powered on), making the phase difference method unsuitable. While a multimeter can be used to measure the continuity of corresponding lines, the distance between the electrical cabinet and the motor is usually significant, making measurement and operation inconvenient. Furthermore, the large number of motors and the complex structure and environment of the engine compartment make cable jumpers very difficult to connect. Additionally, using a multimeter's continuity setting solely for power cables may pose safety hazards (due to the presence of AC current in the lines). Disconnecting cables for testing leads to repetitive wiring work and may result in secondary wiring errors. Network testers are only suitable for testing small-diameter cables (8 wires required) and are unsuitable for power cable wiring sequence testing. Manual testing and inspection are prone to omissions or oversights, failing to guarantee the quality of the finished product before shipment and lacking automated analysis and testing capabilities.

[0025] The nacelle system of a wind turbine generator set includes an electrical cabinet, power cables, and a yaw motor. The yaw motor's wiring is located on the lower part of the nacelle platform, far from the electrical cabinet (the other end of the cable connects to a terminal block inside the cabinet). Therefore, after the power cables have been laid, installed, and wired, it is difficult to accurately verify the wiring sequence using existing methods. Furthermore, while the phase sequence can be indirectly determined when the yaw motor is rotating, the large number of yaw motors (e.g., 16 in total) means that if one yaw motor malfunctions, it may be affected by the others, making it difficult to detect abnormal yaw motors promptly. Especially during installation at the final assembly plant, in some cases, the nacelle cannot yaw (i.e., the yaw motors are not allowed to rotate) and cannot be connected to AC power. In these situations, existing methods cannot be used to check the power cable wiring sequence because they rely on the changing patterns of three-phase AC power to determine the sequence. However, to ensure the quality of factory inspection, avoid incorrect wiring or missing connections, and reduce on-site troubleshooting time and grid connection time, it is still necessary to test the phase sequence of the power cables. Furthermore, because the two ends of the cables are far apart (for example, one end is in the electrical cabinet above the engine compartment, and the other end is on the yaw motor side below the engine compartment), manual inspection or measurement is extremely inconvenient in practice.

[0026] For the reasons mentioned above, this disclosure proposes a method for detecting wiring sequence without AC power. Figure 1 This is a flowchart illustrating a line sequence detection method according to an exemplary embodiment of the present disclosure.

[0027] like Figure 1 As shown, in step S101, a DC voltage signal (e.g., a low voltage of 6V or 9V) is applied to the first ends of the plurality of cables to be tested. In the example, the plurality of cables are connected between the terminals of the yaw motor of the wind turbine generator set and the terminals of the nacelle cabinet, or between the terminals of the drivetrain test cabinet and the terminals of the gear oil pump. In the example, the amplitude of the DC voltage signal is determined based on the number of the plurality of cables. For example, the DC voltage value is distributed uniformly or non-uniformly according to the number of cables to be tested (e.g., 4, including U, V, W, PE).

[0028] In step S102, the correctness of the cable sequence is determined based on the polarity of the voltage sensed between the second ends of adjacent groups of cables in the plurality of cables. In the example, if the polarity of the voltage sensed between the second ends of adjacent groups of cables in the plurality of cables is the same, the cable sequence is determined to be correct; if the polarity of the voltage sensed between the second ends of adjacent groups of cables in the plurality of cables is inconsistent, the cable sequence is determined to be incorrect. That is, when one or more polarities of the voltage sensed between the second ends of adjacent groups of cables in the plurality of cables are different from the others, the cable sequence is determined to be incorrect. For example, the polarity of the voltage sensed between the second ends of adjacent groups of cables in the plurality of cables can be indicated by light-emitting diodes (LEDs). For example, if all LEDs are lit, the cable sequence is correct; otherwise, the cable sequence is incorrect.

[0029] In the example, an alarm is triggered in response to the detection of a magnetic field generated by alternating current (AC), e.g., by alerting testers via LEDs and buzzers. This allows for the detection of AC current in the circuit, ensuring the safety of testers. For instance, a qualified contact voltage detector of the appropriate voltage rating can be used to detect the magnetic field generated by AC current. Voltage testing before installing grounding wires can determine if de-energized equipment is de-energized, ensuring the safety of personnel installing grounding wires and preventing serious accidents such as installing grounding wires while the circuit is energized or closing grounding disconnect switches while the circuit is energized.

[0030] In the example, the brightness of a plurality of light-emitting diodes (LEDs) connected between the second ends of each group of adjacent cables in the plurality of cables can be sensed; in response to at least one LED having a brightness of zero and the brightness of the remaining LEDs not exceeding a specific threshold, an open circuit fault is determined in the cable corresponding to the LED with a brightness of zero; in response to at least one LED having a brightness of zero and the brightness of the remaining LEDs exceeding a specific threshold, a short circuit fault is determined in the cable corresponding to the LED with a brightness of zero.

[0031] The wiring sequence detection method according to the exemplary embodiments of this disclosure can complete the detection of the cable sequence when the power cable is not powered by AC, avoiding abnormal operation or steering of the actuator due to incorrect wiring sequence or missing wiring; it can automate the detection of the main actuators of the wind turbine generator set, ensure the standardization of detection and compliance and judgment criteria, reduce the workload of personnel, and further ensure the quality of the product leaving the factory.

[0032] Figure 2 This is a schematic diagram illustrating a line sequence detection apparatus according to an exemplary embodiment of the present disclosure.

[0033] A wiring sequence detection device according to an exemplary embodiment of this disclosure includes: a power supply module for providing a DC voltage signal (e.g., the power supply module provides operating power to the detection device, and the voltage level is generally set to 6V to 24V, preferably 6V to 9V); a voltage comparison module for outputting voltages of different polarities based on the magnitude relationship of the voltage signals input thereto; and a controller configured to: control the power supply module to apply DC voltage signals to the first ends of a plurality of cables to be detected; and determine whether the wiring sequence of the plurality of cables is correct based on the polarity of the voltage sensed by the voltage comparison module between the second ends of each group of adjacent cables in the plurality of cables. In the example, the plurality of cables are connected between the terminals of the yaw motor of a wind turbine generator set and the terminals of the nacelle cabinet, or between the terminals of a drivetrain test cabinet and the terminals of a gear oil pump. Furthermore, the controller is further configured to: determine the amplitude of the DC voltage signal based on the number of the plurality of cables. Figure 2 In the diagram, the voltage comparison module is shown as both a transmitting module and a receiving module, and only the modules that perform the specific functions are shown, while the controller is not shown.

[0034] In the example, the controller is further configured to: determine that the wiring sequence of the multiple cables is correct in response to the fact that the polarity of the voltage sensed between the second ends of each group of adjacent cables in the multiple cables is the same; and determine that the wiring sequence of the multiple cables is incorrect in response to the fact that the polarity of the voltage sensed between the second ends of each group of adjacent cables in the multiple cables is inconsistent. For example, the polarity of the voltage sensed between the second ends of each group of adjacent cables in the multiple cables is indicated by a light-emitting diode (e.g., an LED included in an indicator module). In the example, the controller is further configured to: issue an alarm in response to detecting a magnetic field generated by alternating current. For example, by means of... Figure 2 The voltage detection module shown detects the magnetic field generated by alternating current, and through methods such as... Figure 2 The indicator module shown is used to issue alarms. This module is capable of emitting audible and / or visual indicators, and can be used to implement power indication, alarm buzzers, alarm indicators, wiring sequence indications, etc. For example, when AC power is detected in the line, an alarm buzzer and alarm indicator are used to issue an alarm. The purpose and function of the voltage detection module is to automatically detect whether three-phase AC power is present in the line to ensure the safety of the testing personnel. For example, if three-phase AC power is present, the buzzer will sound and the alarm indicator light will flash to notify the testing personnel that the AC power supply needs to be disconnected before the wiring sequence test can be performed.

[0035] Additionally, in the example, the controller is further configured to: sense the brightness of a plurality of light-emitting diodes (LEDs) connected between the second ends of each group of adjacent cables in a plurality of cables; determine that an open circuit fault exists in the cable corresponding to the LED with zero brightness in response to at least one LED having zero brightness and the brightness of the remaining LEDs not exceeding a specific threshold; and determine that a short circuit fault exists in the cable corresponding to the LED with zero brightness in response to at least one LED having zero brightness and the brightness of the remaining LEDs exceeding a specific threshold.

[0036] Furthermore, each testing device can be equipped with both a transmitting module and a receiving module. During testing, the transmitting module of one testing device can be connected to one end of the power cable, and the receiving module of another testing device can be connected to the other end of the power cable. Additionally, the testing device can be equipped with a self-test switch for automatic functional testing, ensuring that the testing device itself is functioning correctly before performing line sequence testing.

[0037] The wiring sequence detection device according to the exemplary embodiments of this disclosure can directly measure the wiring sequence of connected and installed power cables without the need for additional cables, and is not limited by the distance between the two ends of the cable. It can quickly and intuitively detect whether the wiring sequence of cables not connected to AC power is correct, which helps improve factory inspection quality, reduce manual workload, and solve the problem of inconvenience in manual inspection. Furthermore, the wiring sequence detection device according to the exemplary embodiments of this disclosure can be applied to the detection of various device circuits such as yaw power cables, gear oil pump power cables, and cooling fan power supply circuits. It has low manufacturing costs and can be expanded to accommodate different numbers of cables.

[0038] Figure 3 This is a circuit diagram showing an example of a voltage detection module according to this disclosure.

[0039] In the example, such as Figure 3 As shown, a bistable trigger can be constructed using the NE555. Pins 4, 8, and 7 of the NE555 are connected to the positive power supply; pin 1 of the NE555 is connected to the negative power supply; pin 5 of the NE555 is grounded through a 0.01μF capacitor; pins 2 and 6 of the NE555 are shorted and connected to a detection antenna to receive the magnetic field generated by the alternating current; pin 3 of the NE555 is the output terminal, which is connected to an LED and a buzzer, respectively. Figure 3 The working principle of the voltage detection module shown is as follows: when the detection antenna senses a magnetic field, a loop voltage will be formed inside it, causing the bistable trigger to output voltage (that is, pin 3 of the NE555 will output voltage), driving the LED D1 to flash, and at the same time the buzzer BUZ1 will emit an alarm sound. Figure 3The advantages of the voltage detection module shown are: it is not limited by the power supply voltage and can support working voltages from 4.5V to 16V, making it easy to share a power supply with other detection modules; it has high detection sensitivity and can detect voltages as low as 0.1V, while the transistor series method can only detect voltages as low as 2V.

[0040] Figure 4 This is a circuit diagram illustrating an example of the power supply module and voltage comparison module of the line sequence detection device according to the present disclosure. Figure 5A and Figure 5B This is a schematic diagram illustrating the operation of a line sequence detection apparatus according to an exemplary embodiment of the present disclosure.

[0041] like Figure 4 As shown, resistors R1, R2, R3, and R4 divide the power supply voltage; their resistance values ​​are preferably 1MΩ or 2MΩ. A power switch and a power indicator light are provided on the power supply side. Four voltage comparators, composed of four operational amplifiers, are connected to both ends of each voltage divider resistor and drive a transistor and an LED. When the voltage at the upper end is greater than the voltage at the lower end, the voltage comparator outputs a high level, the transistor conducts, and the LED lights up, indicating that the wiring sequence on both sides is correct. If the wiring sequence is crossed, the voltage at the upper end of the voltage comparator is less than the voltage at the lower end, the voltage comparator outputs a low level, the transistor does not conduct, and the LED does not light up. Therefore, when all LEDs are lit, it indicates that the power cable wiring sequence is correct and the cable connection is secure; otherwise, it indicates that the power cable wiring sequence is incorrect. For example, if... Figure 5A As shown, when the wiring sequence of the power cable is correct, Figure 5A All four indicator lights are lit; for example Figure 5B As shown, when the wiring sequence of the power cable is abnormal, such as when the wiring sequence at both ends of resistor R1 is reversed, the D1 indicator light is not lit, while the other indicator lights are lit.

[0042] Figure 6 This is a schematic diagram illustrating an example of a line sequence detection device according to the present disclosure. Figure 7 This is a schematic diagram showing the wiring arrangement of the wiring sequence detection device according to this disclosure in a practical application scenario.

[0043] like Figure 6As shown, the wire sequence detection device according to this disclosure can be divided into left and right parts. The right side is the transmitting module, which divides the power supply voltage through voltage divider resistors R1, R2, R3, and R4. The resistance values ​​are preferably 1MΩ or 2MΩ, and a transmitting switch is provided. The two ends of each voltage divider resistor are connected to pins 1 to 5 of terminal J1. The left side is the receiving module, which consists of four amplifiers forming four voltage comparators. The four voltage comparators are driven by transistors, and the input terminals of the four voltage comparators are connected to pins 10 to 6 of terminal J2. Two detection devices are required for wire sequence detection. Figure 7 As shown, close the transmit switch on the transmitting side of detection module 1 and connect pins 10 to 6 of terminal J1 to one end of the power cable (e.g., a terminal block inside the electrical cabinet). Close the receive switch on the receiving side of detection module 2 and connect pins 1 to 5 of terminal J2 to the other end of the power cable (e.g., a terminal block for a yaw motor or gear oil pump). If all indicator lights are on, it indicates that the wiring sequence of all cables is correct. Furthermore, if the number of cables is less than 5, the last cable must be connected to the 0V position. Therefore, the wiring sequence detection of the cable bundle can be completed directly even when the cables to be tested are connected and no AC power is applied.

[0044] The wiring sequence detection device disclosed herein utilizes the connected power cables from the nacelle cabinet of a wind turbine generator set to the yaw motor (or the transmission chain test cabinet to the gear oil pump) to perform power cable wiring sequence detection under conditions without AC power, detecting whether the connection sequence of the cables is normal, thereby ensuring the correct rotation of the actuator (e.g., the motor), ensuring factory quality, reducing on-site safety hazards caused by wiring errors, and reducing troubleshooting time.

[0045] Figure 8 This is a schematic diagram illustrating another example of a line sequence detection device according to the present disclosure.

[0046] like Figure 8 As shown, on the transmitting side, R1, R2, and R3 are voltage divider resistors, and R4, R5, and R6 are another group of voltage divider resistors. The two circuits are connected in parallel to the two ends of the power supply B1. On the detection side, a corresponding number of LEDs are provided, with both sides connected to the terminals. During wire sequence detection, the cable bundle is connected to pins 10 to 7 of J1 and pins 1 to 4 of J01 on another detection device, or to pins 10 to 7 of J2 and pins 1 to 4 of J02 on another detection device. That is, the LEDs are powered by the transmitting side, and the unidirectional conductivity of the LEDs is used to achieve wire sequence detection.

[0047] like Figure 8The circuit structure of the line sequence detection device according to this disclosure is simple and easy to implement, but compared with the aforementioned line sequence detection device using a voltage comparator, as... Figure 8 The line sequence detection device according to this disclosure may be limited by the number of light-emitting diodes (LEDs). This is because when using only diodes, the LEDs used for detection are all connected in series, and the operating voltage of a diode is generally 2V. Therefore, there is a certain limitation on the power supply voltage or the number of detection lines. For example, if the power supply voltage is 6V and the number of voltage divider resistors is 4, then each LED receives approximately 1.5V, and therefore cannot be lit normally. Furthermore, if... Figure 8 The detection sensitivity of the line sequence detection device according to this disclosure is lower than that of the aforementioned line sequence detection device using a voltage comparator. For example, if a voltage comparator is used, a voltage of 0.1V can be detected. Therefore, when the number of lines is large or the power supply voltage drops, the function of the detection device will not be affected. However, if a line sequence detection device using a voltage comparator is employed... Figure 8 The line sequence detection device shown in this disclosure may interfere with the detection results when the power supply voltage drops.

[0048] Figure 9 This is a schematic diagram illustrating another example of a line sequence detection device according to the present disclosure.

[0049] like Figure 9 As shown, LEDs D01 to D06 are connected in reverse parallel to LEDs D1 to D6 respectively. Taking LED D1 as an example, its function is as follows: if the wiring sequence is correct, the D1 indicator light is on and the D01 indicator light is off; if the wiring sequence is incorrect, the D1 indicator light is off and the D01 indicator light is on; if both D1 and D01 indicator lights are off and the other indicator lights do not brighten significantly, it indicates a possible open circuit (because if an open circuit occurs, the voltage across R1, R2, and R3 in the right-side circuit will not change, so the brightness of the LEDs will remain unchanged); if both D1 and D01 indicator lights are off and the other indicator lights brighten significantly, it indicates a possible short circuit (because if, for example, resistor R1 is short-circuited, the voltage across R2 and R3 will increase, thereby increasing the voltage across the branches R02 and D2, and R03 and D3, thus increasing the brightness of the LEDs). Resistors R01 to R06 can also be replaced with potentiometers, adjusted according to the winding resistance value of different types of motors (mainly used when the wires are connected to the motor terminals and the resistance value of the motor winding coil is relatively small). A shunt LED chip is added in parallel with the light-emitting diode (LED) to reduce the current in the LED branch, preventing the LED from burning out, since the operating current of the LED is relatively small (generally only a maximum of 20mA).

[0050] Figure 10This is a block diagram illustrating a computing system including at least one computing device and at least one storage device of storage instructions according to an exemplary embodiment of the present disclosure.

[0051] like Figure 10 As shown, the computing system 1000 provided according to an exemplary embodiment of the present invention includes a computing device 1001 and a storage device 1002. The storage device 1002 stores computer-executable instructions. When the computer-executable instructions are executed by the computing device 1001, the line sequence detection method described in any of the foregoing embodiments is executed.

[0052] The computing device 1001 can be deployed in a server or client, or on a node device in a distributed network environment. Furthermore, the computing device 1001 can be a PC, tablet, personal digital assistant, smartphone, web application, or other device capable of executing the aforementioned set of instructions. Here, the computing device is not necessarily a single computing device; it can be any collection of devices or circuits capable of executing the aforementioned instructions (or instruction sets) individually or in combination. The computing device can also be part of an integrated control system or system manager, or can be configured to interconnect locally or remotely (e.g., via wireless transmission) through an interface. In the computing device, the processor includes a central processing unit (CPU), a graphics processing unit (GPU), a programmable logic device, a dedicated processor system, a microcontroller, or a microprocessor. By way of example and not limitation, the processor also includes analog processors, digital processors, microprocessors, multi-core processors, processor arrays, network processors, etc.

[0053] According to another aspect of this disclosure, a computer-readable storage medium is provided that stores instructions, which, when executed by at least one computing device, cause the at least one computing device to perform the thread sequence detection method described in any of the foregoing embodiments. The computer-readable storage medium includes magnetic media such as floppy disks and magnetic tapes, optical media (including optical disc (CD) ROMs and DVD ROMs), magneto-optical media such as floppy discs, hardware devices such as ROMs and RAMs designed for storing and executing program commands, and flash memory. The instructions may include language code executable by a computer using an interpreter and machine language code generated by a compiler.

[0054] By adopting this disclosure, the phase sequence of connected and installed power cables can be directly measured without the need for additional cables or the distance between the two ends of the cables. It can quickly and intuitively detect whether the phase sequence of the cables is correct even when AC power is not connected, thereby improving the quality of factory inspection, reducing manual workload, and solving the problem of inconvenience in manual inspection.

[0055] The processes, methods, or algorithms disclosed herein can be transmitted to, or implemented by, a processing device, controller, or computer, which may include any existing programmable electronic control unit or a dedicated electronic control unit. Similarly, the processes, methods, or algorithms can be stored in various forms as data and instructions executable by a controller or computer, including but not limited to information permanently stored on non-writable storage media (such as ROM devices) and information variablely stored on writable storage media (such as floppy disks, magnetic tapes, CDs, RAM devices, and other magnetic and optical media). The processes, methods, or algorithms can also be implemented in a software executable object. Optionally, the processes, methods, or algorithms can be implemented wholly or partially using suitable hardware components (such as ASICs, FPGAs, state machines, controllers, or other hardware components or devices) or a combination of hardware components, software components, and firmware components.

[0056] Although this disclosure includes specific examples, it will be apparent to those skilled in the art that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered merely for descriptive purposes and not for limiting purposes. The description of features or aspects in each example is to be considered applicable to similar features or aspects in other examples. Suitable results may be obtained if the described techniques are performed in a different order, and / or if components in the described system, architecture, apparatus, or circuit are combined in a different manner and / or if components in the described system, architecture, apparatus, or circuit are replaced or supplemented with other components or their equivalents. Therefore, the scope of this disclosure is not limited by the specific embodiments but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents shall be construed as included in this disclosure.

Claims

1. A line sequence detection method, characterized in that, The line sequence detection method includes: A DC voltage signal is applied to the first end of each of the multiple cables to be tested; The correctness of the cable sequence is determined based on the polarity of the voltage sensed between the second ends of each group of adjacent cables in the plurality of cables.

2. The line sequence detection method according to claim 1, characterized in that, The step of determining whether the wiring sequence of the plurality of cables is correct based on the polarity of the voltage sensed between the second ends of each group of adjacent cables in the plurality of cables includes: In response to the fact that the polarity of the voltage sensed between the second ends of each group of adjacent cables in the plurality of cables is the same, it is determined that the wiring sequence of the plurality of cables is correct. In response to the inconsistency in the polarity of the voltage sensed between the second ends of adjacent groups of cables in the plurality of cables, it is determined that the wiring sequence of the plurality of cables is incorrect.

3. The line sequence detection method according to claim 1 or 2, characterized in that, The polarity of the voltage sensed between the second ends of each set of adjacent cables in the plurality of cables is indicated by a light-emitting diode.

4. The line sequence detection method according to claim 1, characterized in that, The multiple cables are connected between the yaw motor terminals of the wind turbine generator set and the nacelle cabinet terminals, or between the transmission chain test cabinet terminals and the gear oil pump terminals.

5. The line sequence detection method according to claim 1, characterized in that, The amplitude of the DC voltage signal is determined based on the number of the plurality of cables.

6. The line sequence detection method according to claim 1, characterized in that, The line sequence detection method further includes: issuing an alarm in response to detecting a magnetic field generated by alternating current.

7. The line sequence detection method according to claim 3, characterized in that, The line sequence detection method further includes: sensing the brightness of a plurality of light-emitting diodes (LEDs) connected between the second ends of each group of adjacent cables in the plurality of cables; determining that an open circuit fault exists in the cable corresponding to the LED with zero brightness in response to at least one LED having zero brightness and the brightness of the remaining LEDs not exceeding a specific threshold; and determining that a short circuit fault exists in the cable corresponding to the LED with zero brightness in response to at least one LED having zero brightness and the brightness of the remaining LEDs exceeding a specific threshold.

8. A line sequence detection device, characterized in that, The line sequence detection device includes: The power module is used to provide DC voltage signals; A voltage comparator module is used to output voltages with different polarities based on the magnitude of the voltage signals input to it. The controller is configured to: control the power supply module to apply DC voltage signals to the first ends of the plurality of cables to be tested respectively; and determine whether the wiring sequence of the plurality of cables is correct based on the polarity of the voltage sensed by the voltage comparison module between the second ends of each group of adjacent cables in the plurality of cables.

9. A computing system comprising at least one computing device and at least one storage device for storing instructions, characterized in that, When the instruction is executed by the at least one computing device, it causes the at least one computing device to perform the line sequence detection method according to any one of claims 1-7.

10. A computer-readable storage medium for storing instructions, characterized in that, When the instruction is executed by at least one computing device, it causes the at least one computing device to perform the line sequence detection method according to any one of claims 1-7.

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