A method and apparatus for evaluating performance of a merge unit

Abstract

The application provides a kind of merging unit performance evaluation method and device, wherein the method comprises: adjusting analog voltage to first voltage, obtaining the second voltage of the adjusted merging unit;Wherein, the first voltage is the voltage value of simulating the power state of remote module, and the second voltage is the voltage value of the merging unit adjusted according to the first voltage;Simulate the voltage value of the fault of remote module, obtain the first time of the voltage value of the merging unit from normal value to preset value;Determine whether the second voltage and the first time are within the respective preset threshold range, if the second voltage and the first time are within the respective preset threshold range, then the performance of the merging unit is not a problem;If at least one of the second voltage and the first time is not within the preset threshold range, then the performance of the merging unit has a problem. In this way, the single detection of the DC current transformer merging unit is realized, the detection efficiency is improved, and the control function test of the laser of the DC current merging unit is realized.

Description

Technical Field

[0001] This application relates to the field of power equipment testing technology, and in particular to a method and apparatus for evaluating the performance of a combined unit. Background Technology

[0002] With the development of power systems towards higher voltage and larger capacity, DC current transformers have gradually become key components for ensuring stable system operation. Internationally, DC current transformers are generally divided into optical DC current transformers and zero-flux DC current transformers. Optical DC current transformers are mainly used for DC current measurement in the main circuit, while zero-flux DC current transformers are mainly used in grounding stages. In the past decade, domestically produced DC current transformers have mainly been shunt-type electrical DC current transformers. Shunt-type DC current transformers use a shunt to convert the measured DC current signal into a low-voltage signal according to a certain ratio. This signal is then converted into an optical signal by a converter and transmitted to the control room via optical fiber for measurement, protection, and control in the DC transmission system. The remote module receives and processes the output signal of the shunt or air-core coil. The output of the remote module is a serial digital optical signal. The operating power of the remote module is provided by a laser located in the merging unit in the control room. Each remote module has an analog input terminal to receive the output signal of the shunt or air-core coil, an optical fiber receiver to receive the laser, and an optical fiber transmitter to transmit digital signals. The merging unit has two main functions: receiving, merging, and forwarding digital signals, and controlling the laser power supply.

[0003] To ensure the normal operation of the power system, regular inspection of DC current transformers is essential. Currently, DC current transformer inspection is primarily offline, applying DC current to the electronic DC current transformer to perform overall accuracy testing. However, this method only tests the entire DC current transformer, including the current sensor, remote module, and merging unit, failing to perform individual unit testing. Furthermore, this method requires an external DC current source, resulting in low on-site testing efficiency. Finally, regarding the transmission of optical power information from the DC merging unit, since the actual load of the remote module is dynamic, it only reflects the laser's output power, not its control function or the actual output power after electro-optical conversion, thus hindering the evaluation of the laser's performance indicators. Summary of the Invention

[0004] This application provides a method and apparatus for evaluating the performance of a merging unit, thereby enabling individual testing of a DC current transformer merging unit, improving testing efficiency, and achieving individual transmission characteristic testing of the DC current merging unit and laser control function testing.

[0005] Firstly, this application provides a method for evaluating the performance of merged units. This method is executed by a computing device, which can be understood as a computer or server, etc., and is not limited thereto in this application. The method includes:

[0006] The simulated voltage is adjusted to a first voltage to obtain a second voltage after adjustment by the merging unit; wherein, the first voltage is the voltage value simulating the power state of the remote module, and the second voltage is the voltage value adjusted by the merging unit according to the first voltage; the voltage value simulating a fault in the remote module is used to obtain the first time when the voltage value of the merging unit reaches the preset value from the normal value; it is determined whether the second voltage and the first time are within their respective preset threshold ranges. If both the second voltage and the first time are within their respective preset threshold ranges, the performance of the merging unit is not problematic; if at least one of the second voltage and the first time is not within the preset threshold range, the performance of the merging unit is problematic.

[0007] In this way, the present application first adjusts the simulated voltage to obtain the second voltage after adjustment by the merging unit, and determines whether the second voltage is within the preset voltage range, thereby evaluating whether the voltage regulation function of the merging unit meets the requirements; then, the present application obtains the first time taken by the merging unit to stabilize the voltage value to the preset threshold range when a simulated fault occurs, thereby evaluating whether the voltage regulation effectiveness function of the merging unit meets the requirements; by using both methods to jointly determine whether the merging unit meets the evaluation requirements, not only is it possible to test the merging unit separately and improve the detection efficiency, but it also evaluates the function of the merging unit from multiple dimensions, making the evaluation results more accurate.

[0008] The aforementioned merging unit performance evaluation method further includes: sending a first digital signal to the merging unit to simulate the sampling value protocol of the remote module, obtaining a second digital signal of the merging unit; and comparing the first digital signal and the second digital signal to obtain the digital signal processing accuracy of the merging unit.

[0009] In this manner, the present application sends a first digital signal of the analog remote module sampling value protocol to the merging unit and receives the signal from the merging unit as a second signal. Based on the first and second signals, the digital signal processing accuracy of the merging unit is calculated. This method requires adjusting the channel correspondence and scaling factor between the remote module sampling value protocol and the merging unit sampling value protocol. This not only allows for understanding the digital signal processing accuracy of the merging unit but also lays the foundation for various tests in the performance evaluation of the merging unit.

[0010] The aforementioned performance evaluation method for merging units further includes: superimposing an AC signal onto a DC signal to obtain a signal to be tested; discretizing the signal to be tested and sending it to the merging unit, recording the transmission time of the signal to be tested and the reception time of the merging unit; calculating the relative phase of the merging unit based on the wavenumber output by the merging unit in the first cycle; and calculating the transfer time of the merging unit based on the transmission time, reception time, and relative phase; wherein the transfer time is used to evaluate the signal processing timeliness of the merging unit.

[0011] In the above method, since DC signals do not contain phase information, the processing time of the digital signal of the merging unit cannot be tested. Therefore, the response time test requires superimposing an AC signal on the DC signal to obtain the signal under test. The signal under test is then discretized, and the signal transmission time and the receiving time of the merging unit are recorded to lay the foundation for subsequent evaluation of the timeliness of the received signal of the merging unit. The relative phase of the merging unit is calculated based on the wavenumber output by the merging unit in the first cycle, and the transmission time of the merging unit is calculated based on the transmission time, the receiving time, and the relative phase. In this way, this application solves the problem that DC signals cannot be used to test the digital signal processing time, and realizes the evaluation of the signal processing timeliness of the merging unit.

[0012] In the aforementioned performance evaluation method for the merging unit, adjusting the simulated voltage to a first voltage and obtaining the adjusted second voltage of the merging unit includes: sending a first voltage simulating the power state of the remote module to the merging unit according to the transmission protocol of the remote module; wherein the power state of the remote module includes a low power state, a normal power state, and a high power state; acquiring the optical power signal output by the laser power supply of the merging unit; and obtaining the second voltage based on the optical power signal.

[0013] In this manner, according to the transmission protocol of the remote module, this application sends a first voltage simulating the power state of the remote module to the merging unit, and obtains a second voltage based on the optical power signal output by the laser power supply of the merging unit. By obtaining different voltage values ​​output by the merging unit under different states of the remote module, this method determines whether the voltage regulation function of the merging unit is normal, ensuring the accuracy and multidimensionality of the performance evaluation of the merging unit.

[0014] The aforementioned merging unit performance evaluation method further includes: setting the current data sent to the merging unit to 0 and sending a first voltage to the merging unit; obtaining the optical power signal output by the laser power supply of the merging unit; obtaining a third voltage based on the optical power signal; wherein the third voltage is the voltage adjusted by the merging unit under the simulated no-load condition of the remote module.

[0015] By setting the current data sent to the merging unit to 0, this application simulates the no-load condition of the remote module. Under this condition, a first voltage is sent to the merging unit, the optical power signal output by the laser power supply of the merging unit is obtained, and a third voltage is obtained based on the optical power signal. This method, in addition to assessing the normality of the voltage regulation function of the merging unit and ensuring the accuracy and multidimensionality of the merging unit performance evaluation, also evaluates the regulation capability of the merging unit under the no-load condition of the remote module, ensuring the completeness and multidimensionality of the merging unit performance evaluation.

[0016] The aforementioned performance evaluation method for the merging unit further includes: stopping the transmission of messages from the simulated remote module to the merging unit, and determining whether a heartbeat signal sent by the merging unit is received within a preset time; if a heartbeat signal is received, the heartbeat function of the merging unit is working properly; if no heartbeat signal is received, the heartbeat function of the merging unit is faulty.

[0017] By employing the above method, this application stops sending messages from the simulated remote module to the merging unit and determines whether a heartbeat signal from the merging unit is received within a preset time, thereby determining whether there is a problem with the heartbeat function of the merging unit. Evaluating the heartbeat performance of the merging unit ensures that it still has the function of sending heartbeat signals to the remote module under extreme conditions, thus enabling a more comprehensive performance evaluation of the merging unit.

[0018] The aforementioned performance evaluation method for the merging unit further includes: obtaining the transmitting power of the merging unit and obtaining the received power; wherein the transmitting power is obtained by the power data transmitted by the merging unit to the monitoring module, and the received power is obtained based on the power data received by the photovoltaic cell; and the laser circuit conversion efficiency of the merging unit is calculated based on the transmitting power and the received power.

[0019] In the above manner, this application calculates the laser circuit conversion efficiency of the merging unit based on the transmitting power and the actual received power of the merging unit, thereby realizing the state assessment of the laser in the merging unit.

[0020] The aforementioned performance evaluation method for the merging unit further includes: sending messages of continuous frame loss and bit errors to the merging unit to determine whether the merging unit sets the abnormality flag; if it can, the merging unit alarm function evaluation passes; if it cannot, the merging unit alarm function evaluation fails.

[0021] By using the above method, the state of the merging unit when the simulated remote module malfunctions is obtained, and it is determined whether the merging unit sets the malfunction flag. This determines whether the alarm function evaluation of the merging unit has passed, thus realizing a multi-dimensional performance evaluation of the merging unit.

[0022] Secondly, this application provides a merging unit performance evaluation device, including: a main control unit, an AD conversion module, a photoelectric converter, a fiber optic serial port one, a fiber optic serial port two, an Ethernet physical layer chip, a fiber optic Ethernet, and a photoelectric conversion power supply module.

[0023] The optical fiber serial port 1 is connected to interface 1 of the merging unit at one end and to the photoelectric converter at the other end, serving as a remote module to send sampled value information to the merging unit; optical fiber serial port 2 is connected to interface 3 of the merging unit at one end and to the photoelectric converter at the other end; the other end of the photoelectric converter is connected to the main control unit; optical fiber serial port 1 is used to send information to the merging unit, and optical fiber serial port 2 is used to receive information sent by the merging unit; one end of the Ethernet physical layer chip is connected to the main control unit, and the other end is connected to the optical fiber Ethernet; the other end of the optical fiber Ethernet is connected to the merging unit to receive signals from the merging unit's monitoring module; one end of the AD conversion module is connected to the main control unit, and the other end is connected to the photoelectric conversion power supply module; the other end of the photoelectric conversion power supply module is connected to the laser power supply interface of the merging unit through a power supply fiber, serving as a remote module. The unit receives the optical power signal output by the merging unit; the laser power supply interface is interface two of the merging unit; the simulated voltage is adjusted to the first voltage to obtain the second voltage after adjustment by the merging unit; wherein, the first voltage is the voltage value simulating the power state of the remote module, which is sent to interface one of the merging unit through fiber optic serial port one, and the second voltage is the voltage value adjusted by the merging unit according to the first voltage, corresponding to interface two of the merging unit; the voltage value simulating the voltage value of the remote module malfunction is obtained to obtain the first time when the voltage value of the merging unit reaches the preset value from the normal value; it is determined whether the second voltage and the first time are within their respective preset threshold ranges. If both the second voltage and the first time are within their respective preset threshold ranges, the performance of the merging unit is not problematic; if at least one of the second voltage and the first time is not within the preset threshold range, the performance of the merging unit is problematic.

[0024] In the aforementioned merging unit performance evaluation device, the photoelectric conversion power supply module includes: a signal isolation unit, a photovoltaic cell, a virtual load, and a power supply optical fiber;

[0025] One end of the signal isolation unit is connected to the AD conversion module, and the other end is connected to the virtual load; the other end of the virtual load is connected to the photovoltaic cell, and the photovoltaic cell is connected to the merging unit through the power supply fiber.

[0026] Thirdly, this application provides a merging unit performance evaluation system, including: a voltage acquisition module, a time acquisition module, and a performance evaluation module;

[0027] The voltage acquisition module is used to adjust the simulated voltage to a first voltage and obtain a second voltage after adjustment by the merging unit. The first voltage is the voltage value simulating the power state of the remote module, and the second voltage is the voltage value adjusted by the merging unit according to the first voltage. The time acquisition module is used to simulate the voltage value of the remote module when it malfunctions and obtain the first time when the voltage value of the merging unit reaches the preset value from the normal value. The performance evaluation module is used to determine whether the second voltage and the first time are within their respective preset threshold ranges. If both the second voltage and the first time are within their respective preset threshold ranges, the performance of the merging unit is not problematic. If at least one of the second voltage and the first time is not within the preset threshold range, the performance of the merging unit is problematic.

[0028] Fourthly, this application also provides a computing device, comprising: a memory for storing program instructions; and a processor for calling the program instructions stored in the memory and executing any method described in the first aspect according to the obtained program instructions.

[0029] Beneficial effects: Through the above method, this application first adjusts the simulated voltage to obtain the second voltage after adjustment by the merging unit, and determines whether the second voltage is within the preset voltage range, thereby evaluating whether the voltage regulation function of the merging unit meets the requirements; then, this application obtains the first time taken by the merging unit to stabilize the voltage value to the preset threshold range when a simulated fault occurs, thereby evaluating whether the voltage regulation effectiveness function of the merging unit meets the requirements; by using both methods to jointly determine whether the merging unit meets the evaluation requirements, not only is it possible to test the merging unit separately and improve the detection efficiency, but it also evaluates the function of the merging unit from multiple dimensions, making the evaluation results more accurate. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a flowchart illustrating a method for evaluating the performance of a merging unit provided in Embodiment 1 of this application;

[0032] Figure 2 This is a flowchart illustrating a method for evaluating the performance of a merging unit, as provided in Embodiment 2 of this application.

[0033] Figure 3 This is a schematic diagram of the structure of a merging unit performance evaluation device provided in Embodiment 3 of this application;

[0034] Figure 4This is a schematic diagram of the merging unit provided in Embodiment 3 of this application;

[0035] Figure 5 This is a schematic diagram of a merging unit performance evaluation system provided in Embodiment 4 of this application. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0037] Example 1

[0038] This application provides a method for evaluating the performance of a merging unit, enabling individual testing of a DC current transformer merging unit, improving testing efficiency, and achieving individual transmission characteristic testing of the DC current merging unit and laser control function testing. For example... Figure 1 As shown, this method can be executed by a computing device, which can be understood as a server (of course, in practical applications it may also be a server cluster, etc., which is not specifically limited here), a computer, etc., or it can be executed by a chip with data processing capabilities. The software involved uses QT programming. QT is a cross-platform graphical C language programming tool that is compatible with both Windows and Linux platforms. It can run on a host PC or on the LCD of the testing instrument, which is not specifically limited here. The specific execution of the method is as follows:

[0039] Step 101: Adjust the analog voltage to the first voltage to obtain the second voltage after adjustment by the merging unit.

[0040] The first voltage is the voltage value simulating the power state of the remote module, and the second voltage is the voltage value adjusted by the merging unit based on the first voltage.

[0041] The control logic of the laser power supply in the merging unit relies on the status information of the remote module to regulate the laser power supply. Therefore, the test equipment sends messages to the merging unit according to the transmission protocol of the remote module to determine the laser power supply regulation capability of the merging unit under different states.

[0042] Specifically, according to the transmission protocol of the remote module, a first voltage simulating the power state of the remote module is sent to the merging unit; wherein, the power state of the remote module includes a low power state, a normal power state, and a high power state.

[0043] When the voltage is below 95% of the voltage reference value, it is a low power supply state, and the power supply status message in the simulated remote module's message is changed to low power supply. When the voltage is above 110% of the voltage reference value, it is a high power supply state, and the power supply status message in the simulated remote module's message is changed to high power supply. When the voltage is between 95% and 110% of the voltage reference value, it is a normal power supply state, and the power supply status message in the simulated remote module's message is changed to normal power supply.

[0044] Obtain the optical power signal output by the laser power supply of the merging unit; obtain the second voltage based on the optical power signal.

[0045] There are three possibilities in obtaining the second voltage:

[0046] In scenario 1, the reference voltage of the AD conversion module is adjusted to a low power state, and a low power state message is sent to the merging unit. At this time, the merging unit receives a power state voltage that is below 95% of the voltage reference value. Therefore, the merging unit will increase the optical power output of the laser power supply. The photocell receives the power output of the laser power supply from the merging unit and converts it into a voltage value, thereby obtaining the second voltage. Since the optical power output of the laser power supply has been increased, the second voltage should be within the voltage range of the normal power supply state if the merging unit is functioning normally.

[0047] In scenario 2, the reference voltage of the AD conversion module is adjusted to the normal power supply state, and a normal power supply state message is sent to the merging unit. At this time, the merging unit receives a power supply state voltage between 95% and 110% of the voltage reference value. Therefore, the merging unit will maintain the optical power output value of the current laser power supply. After receiving the power output value of the laser power supply from the merging unit, the photocell converts it into a voltage value, thereby obtaining the second voltage. Since the original optical power output value of the laser power supply is maintained, the second voltage should be within the voltage range of the normal power supply state under normal merging unit conditions.

[0048] In scenario 3, the reference voltage of the AD conversion module is adjusted to a high power supply state, and a high power supply state message is sent to the merging unit. At this time, the merging unit receives a power supply state voltage that is above 110% of the voltage reference value. Therefore, the merging unit will reduce the optical power output value of the current laser power supply. After receiving the power output value of the laser power supply from the merging unit, the photocell converts it into a voltage value, thereby obtaining the second voltage. Since the original optical power output value of the laser power supply has been reduced, the second voltage should be within the voltage range of the normal power supply state if the merging unit is functioning normally.

[0049] In this way, the voltage regulation capability of the laser power supply of the merging unit can be simulated when the actual power of the remote module changes under normal operating conditions, thereby evaluating the voltage regulation performance of the merging unit. It should be noted that the above-described range of voltage states is only a preferred embodiment of this application, and this application does not limit it.

[0050] Step 102: Simulate the voltage value of the remote module when it fails, and obtain the first time when the voltage value of the merging unit reaches the preset value from the normal value.

[0051] A remote module malfunction causing sampling or operational abnormalities typically presents in two states: either the AD conversion module itself malfunctions, or digital message transmission malfunctions. When the AD conversion module malfunctions, it enters a low-power state; when digital message transmission malfunctions, it stops transmitting digital messages.

[0052] The system simulates the voltage value when a remote module malfunctions, monitors the change in the voltage value after adjustment by the merging unit, and tests the first time it takes for the voltage value to rise from the normal value to the preset value. The normal value refers to the reference voltage value before the remote module malfunctions. The preset value is a high voltage value obtained based on the actual situation and is determined accordingly. For example, if the normal value is 3V, and the preset value is set to 3.3V, then the time it takes for the voltage value to rise from 3V to 3.3V is recorded as the first time.

[0053] In this way, this application achieves the evaluation of the laser power supply response time of the merging unit, thereby determining whether the merging unit can react in a timely manner and adjust the voltage when a remote module fails.

[0054] Step 103: Determine whether the second voltage and the first time are within their respective preset threshold ranges. If both the second voltage and the first time are within their respective preset threshold ranges, then the performance of the merging unit is not problematic. If at least one of the second voltage and the first time is not within the preset threshold range, then the performance of the merging unit is problematic.

[0055] First, it is determined whether the second voltage is between 95% and 110% of the reference voltage value. If not, the performance of the merging unit has a problem, and the performance evaluation fails. If it is, then it is determined whether the first time is within a preset range. If not, for example, if the preset first time range is 0-1 second and the first time is 1.1 seconds, the performance of the merging unit has a problem, and the performance evaluation fails. If it is, for example, if the preset first time range is 0-1 second and the first time is 0.4 seconds, the performance evaluation of the merging unit passes. It should be noted that the above setting of the voltage reference value range and the preset time range are just examples; other values ​​can also be selected, and this application does not limit them.

[0056] The aforementioned merging unit evaluation method further includes sending a first digital signal to the merging unit to simulate the sampling value protocol of the remote module, obtaining a second digital signal from the merging unit; and comparing the first digital signal and the second digital signal to obtain the digital signal processing accuracy of the merging unit.

[0057] The DC current transformer primarily transmits DC current signals. Therefore, during testing, a digital DC current signal is sent through the transmit port of the fiber optic serial port to simulate the sampling value protocol of the remote module. The digital signal from the merging unit is then received through the receive port of the fiber optic serial port. Because the test signal is a DC signal, signal synchronization is unnecessary; the received digital DC current signal is directly compared with the transmitted signal to obtain the digital signal processing accuracy. Since the channel correspondence and scaling factor between the remote module's sampling value protocol and the merging unit's sampling value protocol need to be adjusted during execution, obtaining the digital signal processing accuracy is fundamental to evaluating the merging unit's performance and serves as a solid foundation for subsequent performance evaluation.

[0058] The aforementioned merging unit evaluation method also includes superimposing an AC signal onto a DC signal to obtain the signal to be tested;

[0059] The formula for obtaining the signal to be tested is as follows:

[0060] ;

[0061] in, The signal to be tested. It is a DC signal. For communication signals, For frequency.

[0062] After discretizing the signal to be tested, it is sent to the merging unit, and the transmission time of the signal to be tested and the reception time of the merging unit are recorded.

[0063] The remote module has a sampling rate of 50kHz. The output formula is discretized as follows:

[0064] ;

[0065] in, For the discretized first... Current sampling values ​​at each point This is the sampling point number.

[0066] The relative phase of the merging unit is calculated based on the wavenumber output by the merging unit during the first cycle.

[0067] The transfer time of the merging unit is calculated based on the transmission time, reception time, and relative phase; the transfer time is used to evaluate the signal processing timeliness of the merging unit.

[0068] by The time of sending =0 is the starting point of the time. Simultaneously, the time when the data is collected and merged by the unit is recorded as... The merging unit has a sampling rate of 10kHz, forming a new sampling sequence. The calculation period is 8 cycles, and the data window length is... Data window data is sorted by frequency. f After performing a fixed-frequency Fourier integral to calculate the real and imaginary parts of the data, the relative phase is obtained. Then, after converting the phase to time according to the frequency and performing time repair, the final transmission time of the merging unit is obtained:

[0069] ；

[0070] in, Relative phase, This refers to the transmission time of the merged unit.

[0071] The above method, because DC signals do not contain phase information, cannot be used to test the processing time of the digital signal of the merging unit. Therefore, response time testing requires superimposing an AC signal onto the DC signal to obtain the signal under test. The signal under test is then discretized, and the signal transmission time and the merging unit's reception time are recorded to lay the foundation for subsequent evaluation of the merging unit's signal reception time. The relative phase of the merging unit is calculated based on the wavenumber output by the merging unit in the first cycle, and the transfer time of the merging unit is calculated based on the transmission time, reception time, and relative phase. In this way, this application solves the problem that DC signals cannot be used to test the digital signal processing time, and realizes the evaluation of the merging unit's signal processing timeliness.

[0072] Stop sending messages from the simulated remote module to the merging unit and determine whether a heartbeat signal from the merging unit is received within a preset time. If a heartbeat signal is received, the heartbeat function of the merging unit is working properly; if no heartbeat signal is received, the heartbeat function of the merging unit is malfunctioning.

[0073] To prevent damage to the laser power supply of the merging unit due to prolonged high-power output, a remote module failure is simulated, where the remote module fails to send messages. In this case, the laser power supply should operate at high power for a period of time before entering a sleep state, and then send heartbeats at regular intervals to activate the remote module. The tester monitors the AD acquisition voltage while the message sending state is stopped to test whether the heartbeat function of the merging unit's laser is normal.

[0074] The transmitting power and the received power of the merging unit are obtained. The transmitting power is obtained by the power data sent by the merging unit to the monitoring module, and the received power is obtained by the power data received by the photovoltaic cell. The laser circuit conversion efficiency of the merging unit is calculated based on the transmitting power and the received power.

[0075] Send messages of continuous frame loss and bit errors to the merging unit and determine whether the merging unit sets the abnormality flag. If it can, the merging unit alarm function evaluation passes; if it cannot, the merging unit alarm function evaluation fails.

[0076] The merging unit should have an alarm function. In the event of an abnormal operation of the remote module, it should be able to set the fault flag and clear the data to 0, thereby enabling the DC control and protection equipment to lock out and prevent accidents caused by faults in the remote module or laser power supply. The alarm function test is completed by simulating an abnormality in the remote module under rated load and simultaneously reading sampled data from the merging unit via the fiber optic serial port. This application can simulate two abnormal situations of the remote module: first, continuous frame loss and bit errors under rated load, testing whether the abnormal flag bit of the merging unit's output data can be set; second, under rated load, setting the AD power low flag in the protocol, simultaneously monitoring the sampled data from the merging unit, and performing waveform recording tests. Simultaneously, the abnormal flag bit of the merging unit's output data is set, and the sampled data current value is reduced to 0.

[0077] In this way, the present application first adjusts the simulated voltage to obtain the second voltage after adjustment by the merging unit, and determines whether the second voltage is within the preset voltage range, thereby evaluating whether the voltage regulation function of the merging unit meets the requirements; then, the present application obtains the first time taken by the merging unit to stabilize the voltage value to the preset threshold range when a simulated fault occurs, thereby evaluating whether the voltage regulation effectiveness function of the merging unit meets the requirements; by using both methods to jointly determine whether the merging unit meets the evaluation requirements, not only is it possible to test the merging unit separately and improve the detection efficiency, but it also evaluates the function of the merging unit from multiple dimensions, making the evaluation results more accurate.

[0078] Example 2

[0079] This embodiment, based on the merging unit performance evaluation method provided in Embodiment 1 of this application, adjusts the process of adjusting the analog voltage to a first voltage to obtain the adjusted second voltage of the merging unit, such as... Figure 2 As shown, the specific implementation method is as follows:

[0080] Step 201: Set the current data sent to the merging unit to 0, and send the first voltage to the merging unit;

[0081] At this time, the laser power supply adjustment function test is performed when the simulated remote module is unloaded. The data transmission current is set to 0, and only the power status bit is controlled. Different power status bits are sent to the merging unit to obtain the merging unit's ability to adjust different power statuses.

[0082] Step 202: Obtain the optical power signal output by the laser power supply of the merging unit;

[0083] The laser power supply of the merging unit adjusts the magnitude of the optical power signal according to different power status bits. For example, with the current data at 0 and the reference voltage at 3V, the optical power signal output by the merging unit has the following three possibilities:

[0084] Case 1: When the remote module is in a low power state, the merging unit receives a voltage status of the remote module below 2.85V. In this case, the merging unit increases the optical power signal to ensure that the power supply voltage of the remote module is maintained at the voltage reference value.

[0085] Scenario 2: When the remote module is in a normal power supply state, the merging unit receives the voltage status of the remote module between 2.85V and 3.3V. At this time, the merging unit determines that the power supply voltage of the remote module remains at the voltage reference value and the optical power signal remains unchanged.

[0086] Case 3: When the remote module is in a high power state, the merging unit receives a voltage state of the remote module that is higher than 3.3V. In this case, in order to ensure that the power supply voltage of the remote module is kept at the voltage reference value, the merging unit reduces the optical power signal.

[0087] Step 203: Obtain the third voltage based on the optical power signal.

[0088] The third voltage is the voltage adjusted by the merging unit under the condition of no load on the simulated remote module.

[0089] The voltage adjusted by the merging unit is calculated based on the optical power signal of the merging unit as the third voltage. It is then determined whether the third voltage is within the range of 95% to 110% of the voltage reference value. If it is within this range, the merging unit can perform power supply voltage regulation under no-load conditions. If it is not, the merging unit cannot perform power supply voltage regulation under no-load conditions.

[0090] Calculate the output power of the photovoltaic cell based on the collected voltage signal. The time curve is used to calculate the adjustment slope of the laser power supply. Based on the adjustment slope of the power supply, the voltage adjustment speed of the merging unit can be determined, so as to judge the dynamic performance of the merging unit.

[0091] Through this embodiment, this application realizes the voltage regulation function of the merging unit when the current data sent to the merging unit is set to 0 under the condition of no load of the simulated remote module, which ensures the stability of the voltage regulation of the merging unit. At the same time, the performance of the merging unit is evaluated from multiple dimensions to ensure the reliability of the evaluation results.

[0092] Example 3

[0093] Based on the same technological concept Figure 3 An exemplary embodiment of the present application provides a merging unit performance evaluation device, which includes: a main control unit 2, an AD conversion module 3, a photoelectric converter 4, a fiber optic serial port one, a fiber optic serial port two, an Ethernet physical layer chip 6, a fiber optic Ethernet 7, and a photoelectric conversion power supply module 8.

[0094] Among them, one end of the fiber optic serial port 1 is connected to interface 1 (receiving end) of the merging unit 1, and the other end is connected to the photoelectric converter 4, serving as a remote module to send sampled value information to the merging unit; one end of the fiber optic serial port 2 is connected to interface 3 (transmitting end) of the merging unit 1, and the other end is connected to the photoelectric converter 4; the other end of the photoelectric converter 4 is connected to the main control unit 2; the fiber optic serial port 1 is used to send information to the merging unit, and the fiber optic serial port 2 is used to receive information sent by the merging unit; one end of the Ethernet physical layer chip 6 is connected to the main control unit 2, and the other end is connected to the fiber optic Ethernet 7; the other end of the fiber optic Ethernet 7 is connected to the merging unit 1, serving as a signal sent by the merging unit 1 to the monitoring module; one end of the AD conversion module 3 is connected to the main control unit 2, and the other end is connected to the photoelectric conversion power supply module 8; the other end of the photoelectric conversion power supply module 8 is connected to interface 2 (laser power supply interface) of the merging unit 1 through the power supply fiber, serving as a remote module to receive the optical power signal output by the merging unit 1.

[0095] This device is used to perform the following steps:

[0096] The simulated voltage is adjusted to a first voltage to obtain a second voltage after adjustment by merging unit 1. The first voltage is the voltage value simulating the power state of the remote module, transmitted to interface 1 of the merging unit via fiber optic serial port 1. The second voltage is the voltage value adjusted by merging unit 1 based on the first voltage, corresponding to interface 2 of the merging unit. The voltage value simulating a fault in the remote module is used to obtain the first time it takes for the voltage value of merging unit 1 to reach a preset value from its normal value. It is then determined whether the second voltage and the first time are within their respective preset threshold ranges. If both the second voltage and the first time are within their respective preset threshold ranges, the merging unit performance is normal. If at least one of the second voltage and the first time is outside the preset threshold range, the merging unit performance has a problem.

[0097] like Figure 3As shown, the merging unit performance evaluation device includes two photoelectric converters 4 and two fiber optic serial ports 5. One photoelectric converter 4 is connected to the receiving end of the merging unit 1 through fiber optic serial port one, and the other photoelectric converter 4 is connected to the transmitting end of the merging unit 1 through fiber optic serial port two.

[0098] One end of the Ethernet physical layer chip 6 is connected to the main control unit 2, and the other end is connected to the fiber optic Ethernet 7; the other end of the fiber optic Ethernet 7 is connected to the merging unit 1 to receive signals from the merging unit monitoring module.

[0099] One end of the AD conversion module 3 is connected to the main control unit 2, and the other end is connected to the photoelectric conversion power supply module 8; the other end of the photoelectric conversion power supply module 8 is connected to the laser power supply interface of the merging unit 1 through the power supply optical fiber, and is used to receive the optical power signal output by the merging unit 1.

[0100] The photoelectric conversion power supply module 8 includes: a signal isolation unit, a photovoltaic cell, a virtual load R1, and a power supply optical fiber;

[0101] One end of the signal isolation unit is connected to the AD conversion module, and the other end is connected to the virtual load; the other end of the virtual load is connected to the photovoltaic cell, and the photovoltaic cell is connected to the merging unit through the power supply fiber.

[0102] The combined unit structure diagram of the DC current transformer involved in this application is as follows: Figure 4 As shown, merging unit 1 has four external interfaces, including:

[0103] Interface 1: The data processing module 12 receives the sampled value information from the remote module through the fiber optic serial port 14 and sends the sampled value information back to the data processing module 12.

[0104] Interface 2: The data processing module 12 adjusts the optical power of the laser 15 through the laser power control module 13, and the laser 15 transmits the optical power to the remote module through the power supply fiber.

[0105] Interface 3: The data processing module 12 is connected to the photoelectric converter 16, and sends the merged sampled value signal to the control or protection module through the fiber optic serial port 17.

[0106] Interface 4: Data processing module 12 sends the status monitoring signal of the DC transformer to the monitoring module via fiber optic Ethernet 18.

[0107] The aforementioned merging unit performance evaluation device has four external ports when evaluating the performance of the merging unit: first, the fiber optic serial port 1 simulates the remote module to send sampled value information to the merging unit 1; second, the fiber optic serial port 2 receives the sampled value information after conversion and merging by the merging unit 1; third, the photovoltaic cell receives the optical power signal output from the laser 15 of the merging unit 1; and fourth, the fiber optic Ethernet 7 receives the status monitoring signal from the merging unit 1 sent to the DC transformer monitoring module via MMS.

[0108] In this embodiment, the main control unit uses the Xilinx ZYNQ-7020 chip, which is an FPGA+ARM dual-processor architecture. It uses a high-temperature stable crystal oscillator (OCXO) as the clock for the entire system, achieving a frequency accuracy of 5ppm. The AD conversion module uses an 18-bit successive approximation analog-to-digital converter (ADC) AD7982 with a maximum sampling rate of 1000kSPS, enabling high-precision, high-sampling-rate analog-to-digital conversion. The AD7982 operates on a single 2.5V power supply and integrates a low-power, high-speed, 18-bit lossless sampling ADC, an internal conversion clock, and a multi-function serial interface port. On the rising edge of the conversion signal, the device samples the voltage difference between the differential input pins. The reference voltage is provided externally and can be set to the power supply voltage. The device's power consumption and throughput are linearly related. It supports SPI communication and daisy-chain connection modes and provides an optional busy indicator. The fiber optic serial port uses an AFBR 2418TZ fiber optic receiver with an ST interface. It operates from -40 to 85 degrees Celsius, receives data at a wavelength of 865nm, and has a maximum data rate of 50MBd, exhibiting good data compatibility. The photovoltaic cell uses a 2W laser power supply from JDSU and can be seamlessly connected to the laser in the merging unit. The photovoltaic cell output uses a virtual load R1, a high-power resistor. To prevent excessive heat concentration from a single resistor, multiple resistors are connected in parallel, each with a resistance of 200Ω, for a total of four resistors. A 10uF filter capacitor is also included. The signal isolation unit uses a follower design, primarily to isolate the photovoltaic cell conversion circuit from the tester's sampling circuit. It should be noted that the above method is only a preferred embodiment of this application. Other components with the same function or different values ​​can also be used to construct the merging unit performance evaluation device; this application does not limit this.

[0109] Example 4

[0110] Having introduced the merging unit performance evaluation apparatus in the exemplary embodiments of this application, the following describes a merging unit performance evaluation system proposed in this application. This application provides a merging unit performance evaluation system, such as... Figure 5 As shown, the system includes: a voltage acquisition module, a time acquisition module, and a performance evaluation module;

[0111] The voltage acquisition module is used to adjust the simulated voltage to a first voltage and obtain a second voltage after adjustment by the merging unit. The first voltage is the voltage value simulating the power state of the remote module, and the second voltage is the voltage value adjusted by the merging unit according to the first voltage. The time acquisition module is used to simulate the voltage value of the remote module when it malfunctions and obtain the first time when the voltage value of the merging unit reaches the preset value from the normal value. The performance evaluation module is used to determine whether the second voltage and the first time are within their respective preset threshold ranges. If both the second voltage and the first time are within their respective preset threshold ranges, the performance of the merging unit is not problematic. If at least one of the second voltage and the first time is not within the preset threshold range, the performance of the merging unit is problematic.

[0112] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0113] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0114] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0115] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0116] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A method for evaluating the performance of merged units, characterized in that, include: Adjusting the simulated voltage to a first voltage and obtaining a second voltage adjusted by the merging unit includes sending a first voltage simulating the power state of the remote module to the merging unit according to the transmission protocol of the remote module; wherein the power state of the remote module includes a low power state, a normal power state, and a high power state; acquiring the optical power signal output by the laser power supply of the merging unit; and obtaining the second voltage based on the optical power signal; wherein the first voltage is the voltage value simulating the power state of the remote module, and the second voltage is the voltage value adjusted by the merging unit according to the first voltage; Simulate the voltage value when the remote module malfunctions, and obtain the first time when the voltage value of the merging unit reaches the preset value from the normal value; Determine whether the second voltage and the first time are within their respective preset threshold ranges. If both the second voltage and the first time are within their respective preset threshold ranges, then the performance of the merging unit is not problematic. If at least one of the second voltage and the first time is not within the preset threshold range, then the performance of the merging unit is problematic. A first digital signal is sent to the merging unit to simulate the sampling value protocol of the remote module, thereby obtaining a second digital signal from the merging unit; the first digital signal and the second digital signal are compared to obtain the digital signal processing accuracy of the merging unit. An AC signal is superimposed on a DC signal to obtain a test signal; the test signal is discretized and then sent to the merging unit, and the transmission time and reception time of the test signal and the merging unit are recorded; the relative phase of the merging unit is calculated based on the wavenumber output by the merging unit in the first period; the transfer time of the merging unit is calculated based on the transmission time, the reception time, and the relative phase; wherein, the transfer time is used to evaluate the signal processing timeliness of the merging unit; The current data sent to the merging unit is set to 0, and a first voltage is sent to the merging unit; the optical power signal output by the laser power supply of the merging unit is obtained; a third voltage is obtained based on the optical power signal; wherein, the third voltage is the voltage adjusted by the merging unit under the simulated no-load condition of the remote module; Stop sending messages from the simulated remote module to the merging unit, and determine whether a heartbeat signal sent by the merging unit is received within a preset time. If the heartbeat signal is received, the heartbeat function of the merging unit is working properly; if no heartbeat signal is received, the heartbeat function of the merging unit is faulty.

2. The method according to claim 1, characterized in that, The merging unit performance evaluation method further includes: The transmitting power of the merging unit is obtained, and the received power is obtained; wherein, the transmitting power is obtained by the power data sent by the merging unit to the monitoring module, and the received power is obtained based on the power data received by the photovoltaic cell; The laser circuit conversion efficiency of the merging unit is calculated based on the transmitted power and the received power.

3. The method according to claim 1, characterized in that, The merging unit performance evaluation method further includes: Send a message of continuous frame loss and bit error to the merging unit, and determine whether the merging unit sets the abnormality flag; if it can, the alarm function evaluation of the merging unit passes; if it cannot, the alarm function evaluation of the merging unit fails.

4. A device for evaluating the performance of a merging unit, characterized in that, include: Main control unit, AD conversion module, photoelectric converter, fiber optic serial port 1, fiber optic serial port 2, Ethernet physical layer chip, fiber optic Ethernet, photoelectric conversion power supply module; The fiber optic serial port is connected at one end to the interface of the merging unit and at the other end to the photoelectric converter, serving as a remote module to send sampled value information to the merging unit. One end of the fiber optic serial port is connected to the interface of the merging unit, and the other end is connected to the photoelectric converter. The other end of the photoelectric converter is connected to the main control unit; the first fiber optic serial port is used to send information to the merging unit, and the second fiber optic serial port is used to receive information sent by the merging unit. One end of the Ethernet physical layer chip is connected to the main control unit, and the other end is connected to the fiber optic Ethernet; the other end of the fiber optic Ethernet is connected to the merging unit and is used to receive signals from the merging unit monitoring module. One end of the AD conversion module is connected to the main control unit, and the other end is connected to the photoelectric conversion power supply module; the other end of the photoelectric conversion power supply module is connected to the laser power supply interface of the merging unit through a power supply optical fiber, and serves as a remote module to receive the optical power signal output by the merging unit; the laser power supply interface is the second interface of the merging unit. The device is used to perform the following steps: Adjusting the simulated voltage to a first voltage and obtaining a second voltage adjusted by the merging unit includes sending a first voltage simulating the power state of the remote module to the merging unit according to the transmission protocol of the remote module; wherein the power state of the remote module includes a low power state, a normal power state, and a high power state; acquiring the optical power signal output by the laser power supply of the merging unit; and obtaining the second voltage based on the optical power signal; wherein the first voltage is the voltage value simulating the power state of the remote module, which is sent to interface one of the merging unit through fiber optic serial port one, and the second voltage is the voltage value adjusted by the merging unit according to the first voltage, corresponding to interface two of the merging unit; Simulate the voltage value when the remote module malfunctions, and obtain the first time when the voltage value of the merging unit reaches the preset value from the normal value; Determine whether the second voltage and the first time are within their respective preset threshold ranges. If both the second voltage and the first time are within their respective preset threshold ranges, then the performance of the merging unit is not problematic. If at least one of the second voltage and the first time is not within the preset threshold range, then the performance of the merging unit is problematic. A first digital signal is sent to the merging unit to simulate the sampling value protocol of the remote module, thereby obtaining a second digital signal from the merging unit; the first digital signal and the second digital signal are compared to obtain the digital signal processing accuracy of the merging unit. An AC signal is superimposed on a DC signal to obtain a test signal; the test signal is discretized and then sent to the merging unit, and the transmission time and reception time of the test signal and the merging unit are recorded; the relative phase of the merging unit is calculated based on the wavenumber output by the merging unit in the first period; the transfer time of the merging unit is calculated based on the transmission time, the reception time, and the relative phase; wherein, the transfer time is used to evaluate the signal processing timeliness of the merging unit; The current data sent to the merging unit is set to 0, and a first voltage is sent to the merging unit; the optical power signal output by the laser power supply of the merging unit is obtained; a third voltage is obtained based on the optical power signal; wherein, the third voltage is the voltage adjusted by the merging unit under the simulated no-load condition of the remote module; Stop sending messages from the simulated remote module to the merging unit, and determine whether a heartbeat signal sent by the merging unit is received within a preset time. If the heartbeat signal is received, the heartbeat function of the merging unit is working properly; if no heartbeat signal is received, the heartbeat function of the merging unit is faulty.

5. The apparatus according to claim 4, characterized in that, The photoelectric conversion power supply module includes: a signal isolation unit, a photovoltaic cell, a virtual load, and a power supply optical fiber; One end of the signal isolation unit is connected to the AD conversion module, and the other end is connected to the virtual load; the other end of the virtual load is connected to the photovoltaic cell, and the photovoltaic cell is connected to the merging unit through a power supply optical fiber.

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