Testing method and device of broadband synchronous phasor measurement device, computer equipment and readable storage medium

Abstract

The invention relates to a test method and device of a broadband synchronous phasor measurement device, computer equipment, a readable storage medium and a program product. The method comprises the following steps: determining the type of monitoring data in response to a connection instruction, establishing connection of the broadband synchronous phasor measurement device according to a protocol test of the broadband synchronous phasor measurement device, and carrying out oscillation test and harmonic test on the broadband synchronous phasor measurement device according to the monitoring data uploaded by the broadband synchronous phasor measurement device to obtain a corresponding test result. Compared with a traditional test scheme, according to the scheme, the connection with the broadband synchronous phasor measurement device is established based on the protocol test by responding to the connection instruction, and the oscillation test and the harmonic test are carried out on the broadband synchronous phasor measurement device based on the monitoring data uploaded by the broadband synchronous phasor measurement device; therefore, the technical effect of improving the test comprehensiveness of the broadband synchronous phasor measurement device is achieved.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to a test method, device, computer equipment, computer-readable storage medium and computer program product for a wide-band synchronous phasor measurement device. Background Art

[0002] With the continuous expansion of the scale of the power grid, the grid-connected power generation of new energy and the demand for green development, a large number of different types of equipment have been put into the power system to better monitor the power grid, provide intelligent control, improve the transmission capacity and improve the stability of the system. However, while these devices provide compensation and monitoring for the power grid, they also bring some new problems and challenges, which to a certain extent increase the difficulty of data processing in the power grid. Therefore, in order to ensure the stable operation of the wideband synchronized phasor measurement device of the power system, it is necessary to conduct a comprehensive test on the wideband synchronized phasor measurement device to improve the stability of the power system.

[0003] Therefore, there is an urgent need for a method for testing a wide-band synchronized phasor measurement device. Summary of the invention

[0004] Based on this, it is necessary to provide a testing method, device, computer equipment, computer-readable storage medium and computer program product for a wide-band synchronized phasor measurement device that can realize comprehensive testing of the wide-band synchronized phasor measurement device in response to the above technical problems.

[0005] In a first aspect, the present application provides a method for testing a wideband synchronized phasor measurement device, comprising:

[0006] In response to a connection instruction for a wide-frequency synchronized phasor measurement device, determining a type of monitoring data of the wide-frequency synchronized phasor measurement device;

[0007] Establishing a connection with the broadband synchronized phasor measurement device according to a protocol test with the broadband synchronized phasor measurement device; the broadband synchronized phasor measurement device is used to upload monitoring data corresponding to the type;

[0008] According to the monitoring data uploaded by the wide-band synchronous phasor measurement device, a performance test, an oscillation test and a harmonic wave test are performed on the wide-band synchronous phasor measurement device to obtain corresponding test results.

[0009] In a second aspect, the present application also provides a test device for a wide-band synchronized phasor measurement device, comprising:

[0010] A response module, configured to determine the type of monitoring data of the wide-frequency synchronized phasor measurement device in response to a connection instruction for the wide-frequency synchronized phasor measurement device;

[0011] A connection module, used to establish a connection with the wide-band synchronized phasor measurement device according to a protocol test with the wide-band synchronized phasor measurement device; the wide-band synchronized phasor measurement device is used to upload monitoring data corresponding to the type;

[0012] The test module is used to perform performance test, oscillation test and harmonic wave test on the wide-band synchronous phasor measurement device according to the monitoring data uploaded by the wide-band synchronous phasor measurement device to obtain corresponding test results.

[0013] In a third aspect, the present application further provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0014] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0015] In a fifth aspect, the present application also provides a computer program product, including a computer program, which implements the steps of the above method when executed by a processor.

[0016] The test method, device, computer equipment, computer-readable storage medium and computer program product of the above-mentioned wide-band synchronous phasor measurement device determine the type of monitoring data by responding to a connection instruction, establish a connection of the wide-band synchronous phasor measurement device according to the protocol test of the wide-band synchronous phasor measurement device, and perform an oscillation test and a harmonic wave test on the wide-band synchronous phasor measurement device according to the monitoring data uploaded by the wide-band synchronous phasor measurement device to obtain corresponding test results. Compared with the traditional test scheme, this scheme establishes a connection with the wide-band synchronous phasor measurement device based on the protocol test by responding to a connection instruction, and performs an oscillation test and a harmonic wave test on the wide-band synchronous phasor measurement device based on the monitoring data uploaded by the wide-band synchronous phasor measurement device, thereby achieving the technical effect of improving the comprehensiveness of the test of the wide-band synchronous phasor measurement device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 An application environment diagram of a test method for a wide-band synchronous phasor measurement device in one embodiment;

[0019] Figure 2 A schematic flow chart of a test method for a wide-band synchronous phasor measurement device in one embodiment;

[0020] Figure 3 This is an interface diagram of a test terminal in one embodiment;

[0021] Figure 4 A schematic flow chart of a testing method for a wide-band synchronized phasor measurement device in another embodiment;

[0022] Figure 5 A structural block diagram of a test device for a wide-band synchronous phasor measurement device in one embodiment;

[0023] Figure 6 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] The test method of the broadband synchronous phasor measurement device provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown. The test terminal communicates with the wideband synchronized phasor measurement device through a network. The test terminal can establish a connection with the wideband synchronized phasor measurement device based on the protocol test, the wideband synchronized phasor measurement device can collect corresponding monitoring data and upload it to the test terminal, and the test terminal can test the wideband synchronized phasor measurement device based on the monitoring data and obtain corresponding test results. The terminal can be, but is not limited to, various personal computers, laptops, smart phones, and tablet computers.

[0026] In related technologies, with the continuous expansion of the scale of the power grid, the grid-connected power generation of new energy sources and the demand for green development, a large number of different types of equipment have been put into the power system to achieve better monitoring of the power grid, provide intelligent control, improve transmission capacity and improve system stability. However, while these devices provide compensation and monitoring for the power grid, they also bring some new problems and challenges, such as additional oscillations or harmonics. To a certain extent, it increases the difficulty of data processing in the power grid. Therefore, realizing broadband measurement of the power system, how to better discover the test effect of broadband measurement, and real-time measurement of harmonics and harmonic oscillations are of great significance to the problem-solving operation of the entire power system.

[0027] Based on this, this scheme establishes a connection with the wide-band synchronous phasor measurement device based on the protocol test by responding to the connection instruction, and performs oscillation test and harmonic test on the wide-band synchronous phasor measurement device based on the monitoring data uploaded by the wide-band synchronous phasor measurement device, thereby achieving the technical effect of improving the comprehensiveness of the test of the wide-band synchronous phasor measurement device.

[0028] In an exemplary embodiment, Figure 2 As shown, a test method for a wide-band synchronous phasor measurement device is provided, and the method is applied to Figure 1 The test terminal in the example is used to illustrate, including the following steps S202 to S206. Among them:

[0029] Step S202: In response to a connection instruction for the wide-band synchronized phasor measurement device, determine the type of monitoring data of the wide-band synchronized phasor measurement device.

[0030] Wherein, before the test, the test terminal may pre-establish a connection with a PMU (Phasor Measurement Unit, wide-band synchronous phasor measurement device) in the power system. Wherein, the test terminal may receive a connection instruction for the wide-band synchronous phasor measurement device triggered by a user, and the test terminal determines the type of monitoring data of the wide-band synchronous phasor measurement device in response to the connection instruction for the wide-band synchronous phasor measurement device. Wherein, the monitoring data represents the data that needs to be monitored during the test of the wide-band synchronous phasor measurement device. The above-mentioned monitoring data may be the data measured by the wide-band synchronous phasor measurement device, and the types of monitoring data may include multiple types. For example, the monitoring data may include one or more of the phasor amplitude, amplitude modulation depth, modulation frequency, initial phase angle of the modulation part, fundamental frequency and phasor initial phase angle of the wide-band synchronous phasor measurement device.

[0031] Among them, the phasor amplitude represents the amplitude of the signal, which is usually related to the magnitude of the voltage or current in the power system. It is represented by the distance of the signal on the complex plane (from the origin to the end point of the phasor), which can reflect the size of the signal; the amplitude modulation depth describes the degree of change in the phasor amplitude, usually the ratio of the amplitude of the modulated signal to the amplitude of the carrier signal. The greater the modulation depth, the more obvious the amplitude change of the signal amplitude; the modulation frequency refers to the frequency of the modulation change in the amplitude or phase modulation signal. It determines the speed of change of the modulated signal, usually in Hertz; the initial phase angle of the modulation part refers to the starting value of the phase of the modulated signal, usually expressed in degrees or radians. It determines the starting position of the signal phasor in time; the fundamental frequency is the basic frequency of the signal, usually the lowest frequency component in the periodic signal. In the power system, the fundamental frequency is generally 50Hz or 60Hz, representing the normal operating frequency of the system; the phasor initial phase angle refers to the phase angle of the phasor at a certain moment, which describes the position of the signal on the complex plane, usually expressed in degrees or radians. It is related to the starting time or reference point of the signal. The test terminal can display a connection button, and after the user clicks the connection button, a connection instruction with the wide-band synchronous phasor measurement device is triggered.

[0032] Step S204, establishing a connection with the wideband synchronized phasor measurement device according to a protocol test with the wideband synchronized phasor measurement device; the wideband synchronized phasor measurement device is used to upload monitoring data corresponding to the type.

[0033] Among them, the protocol test can be a network connection test performed between the test terminal and the substation where the wide-band synchronous phasor measurement device is located. For equipment in the power system, the protocol test usually involves whether the equipment can correctly implement the data exchange and operation of the communication protocol. For example, it can be confirmed whether the test terminal can communicate normally with the substation. The test terminal can establish a connection with the wide-band synchronous phasor measurement device based on the protocol test with the wide-band synchronous phasor measurement device. Among them, after the wide-band synchronous phasor measurement device establishes a connection with the test terminal, the monitoring data corresponding to the above type can be uploaded in real time, so that the test terminal can perform tests on the wide-band synchronous phasor measurement device.

[0034] Step S206 , performing a performance test, an oscillation test and a harmonic wave test on the wide-band synchronized phasor measurement device according to the monitoring data uploaded by the wide-band synchronized phasor measurement device, and obtaining corresponding test results.

[0035] Among them, the test terminal can obtain the monitoring data uploaded by the above-mentioned wide-band synchronous phasor measurement device, so that the test terminal can perform various tests on the wide-band synchronous phasor measurement device based on the above-mentioned various monitoring data. Among them, the test terminal's test on the wide-band synchronous phasor measurement device includes but is not limited to oscillation test and harmonic test. Among them, the oscillation test includes but is not limited to testing the low-frequency oscillation, sub-synchronous oscillation, super-synchronous oscillation, and wide-band oscillation of the wide-band synchronous phasor measurement device; the harmonic test includes but is not limited to testing the reaction of the wide-band synchronous phasor measurement device to harmonics or direct current, including checking the harmonic sampling accuracy, action / return value testing, and using the output locking function to test the action / return time. After the test terminal performs an oscillation test and a harmonic test on the wide-band synchronous phasor measurement device, the corresponding test results can be obtained. In addition, in some embodiments, the test terminal can also display the waveform based on the test results.

[0036] In the above-mentioned test method for the wide-band synchronous phasor measurement device, the type of monitoring data is determined by responding to a connection instruction, and the connection of the wide-band synchronous phasor measurement device is established according to the protocol test of the wide-band synchronous phasor measurement device. According to the monitoring data uploaded by the wide-band synchronous phasor measurement device, an oscillation test and a harmonic wave test are performed on the wide-band synchronous phasor measurement device to obtain corresponding test results. Compared with the traditional test scheme, this scheme establishes a connection with the wide-band synchronous phasor measurement device based on the protocol test by responding to a connection instruction, and performs an oscillation test and a harmonic wave test on the wide-band synchronous phasor measurement device based on the monitoring data uploaded by the wide-band synchronous phasor measurement device, thereby achieving the technical effect of improving the comprehensiveness of the test of the wide-band synchronous phasor measurement device.

[0037] In one embodiment, according to the monitoring data uploaded by the wide-band synchronous phasor measurement device, a performance test, an oscillation test and a harmonic test are performed on the wide-band synchronous phasor measurement device to obtain corresponding test results, including: according to the monitoring data uploaded by the wide-band synchronous phasor measurement device, one or more of amplitude modulation detection, phase angle modulation detection, frequency harmonic detection and sub-supersynchronous oscillation function detection are performed on the wide-band synchronous phasor measurement device to obtain an oscillation test result; according to the monitoring data, a corresponding harmonic test strategy is determined; the harmonic test strategy is sent to the wide-band synchronous phasor measurement device to obtain the harmonic test result returned by the wide-band synchronous phasor measurement device after the test according to the harmonic test strategy; according to the oscillation test result and the harmonic test result, the corresponding test result of the wide-band synchronous phasor measurement device is obtained.

[0038] In this embodiment, the above-mentioned test for the wide-band synchronous phasor measurement device includes but is not limited to an oscillation test and a harmonic test. For the performance test, including a static performance test and a dynamic performance test, the test terminal can perform one or more of amplitude modulation detection, phase angle modulation detection, and frequency harmonic detection on the wide-band synchronous phasor measurement device according to the monitoring data uploaded by the wide-band synchronous phasor measurement device to obtain the performance test result; in some embodiments, the test terminal can also perform other types of performance tests on the wide-band synchronous phasor measurement device.

[0039] For the oscillation test, the test terminal can perform a sub-supersynchronous oscillation function test on the wide-band synchronous phasor measurement device according to the monitoring data uploaded by the wide-band synchronous phasor measurement device to obtain an oscillation test result. In some embodiments, the test terminal can also perform other types of oscillation tests on the wide-band synchronous phasor measurement device.

[0040] For harmonic testing, the test terminal can determine the corresponding harmonic test strategy based on the monitoring data, and send the harmonic test strategy to the wideband synchronous phasor measurement device. The wideband synchronous phasor measurement device can perform the corresponding step test according to the harmonic test strategy, so that the test terminal can obtain the harmonic test results returned by the wideband synchronous phasor measurement device after the test according to the harmonic test strategy. The test terminal can obtain the corresponding test results of the wideband synchronous phasor measurement device based on the performance test results, oscillation test results and harmonic test results.

[0041] Specifically, the test terminal may be provided with a manual test module and an automatic test module. The test terminal may perform an oscillation test through the manual test module or the automatic test module; the power oscillation module is used to test low-frequency oscillation, subsynchronous oscillation, supersynchronous oscillation, and broadband oscillation;

[0042] The test terminal can also perform harmonic testing through the manual test module or the automatic test module; the harmonic test module is used to verify the test device's response to harmonics or DC, including checking the harmonic sampling accuracy; action / return value testing; and using the output lock function to test the action / return time. In addition, the manual test module can also be used to set the amplitude, angle and frequency of voltage and current to achieve static performance testing and dynamic performance testing of the synchronous phasor measurement device, including but not limited to measurement accuracy testing under various conditions, amplitude step response time testing, phase angle step response time testing, amplitude modulation testing, phase angle modulation testing, amplitude and phase angle simultaneous modulation testing, frequency harmonic detection, healthy phase pulse detection, low-frequency oscillation alarm function detection, sub- / super-synchronous oscillation function detection and other tests.

[0043] Through this embodiment, the test terminal can perform various tests on the wide-band synchronized phasor measurement device including performance testing, oscillation testing and harmonic testing based on the monitoring data of the wide-band synchronized phasor measurement device, so that the test terminal can combine the test results of the various tests to determine the test results of the wide-band synchronized phasor measurement device, thereby improving the comprehensiveness of the test of the wide-band synchronized phasor measurement device.

[0044] In one embodiment, based on the monitoring data uploaded by the wide-band synchronous phasor measurement device, one or more of amplitude modulation detection, phase angle modulation detection and frequency harmonic detection is performed on the wide-band synchronous phasor measurement device to obtain a performance test result, including: based on the phasor amplitude, amplitude modulation depth, modulation frequency, initial phase angle of the modulation part, fundamental frequency and initial phase angle of the phasor, amplitude modulation detection and phase angle modulation detection are performed on the wide-band synchronous phasor measurement device to obtain a performance test result.

[0045] In this embodiment, the above-mentioned performance tests include various types of performance tests for wideband synchronous phasor measurement devices. Among them, amplitude modulation detection checks the detection capability of the wideband synchronous phasor measurement device for amplitude modulation signals, ensuring that the device can correctly measure and track the changes in amplitude during the modulation process. This test focuses on the amplitude modulation depth and response accuracy of the device; for phase angle modulation detection, phase angle modulation detection evaluates the response capability of the wideband synchronous phasor measurement device to phase angle modulation signals, ensuring that the device can accurately detect the modulation changes of the phase angle, especially when the frequency, amplitude or phase of the signal changes. It can stably track. The test terminal can perform amplitude modulation detection and phase angle modulation detection on the wideband synchronous phasor measurement device according to the phasor amplitude, amplitude modulation depth, modulation frequency, initial phase angle of the modulation part, fundamental frequency and initial phase angle of the phasor to obtain performance test results.

[0046] Specifically, the above amplitude modulation detection can be expressed as: ; The above phase angle modulation detection can be specifically expressed as: In addition, in some embodiments, the test terminal may also perform modulation detection on the amplitude and the phase angle simultaneously, which may be specifically expressed as:

[0047] .

[0048] Among them, X m represents the phase amplitude, f represents the fundamental frequency, X d Indicates the amplitude modulation depth, X k represents the phase modulation depth, f a represents the modulation frequency, f represents the fundamental frequency, φ a represents the initial phase angle of the modulation part, and φ0 represents the initial phase angle of the phasor.

[0049] Through this embodiment, the test terminal can combine the phasor amplitude, amplitude modulation depth, modulation frequency, initial phase angle of the modulation part, fundamental frequency and phasor initial phase angle of the wide-band synchronous phasor measurement device to perform amplitude modulation detection and phase angle modulation detection on the wide-band synchronous phasor measurement device, thereby realizing performance testing of the wide-band synchronous phasor measurement device and improving the comprehensiveness of the test of the wide-band synchronous phasor measurement device.

[0050] In one embodiment, based on the monitoring data uploaded by the wide-band synchronous phasor measurement device, one or more of amplitude modulation detection, phase angle modulation detection and frequency harmonic detection is performed on the wide-band synchronous phasor measurement device to obtain a performance test result, including: based on the phasor amplitude, fundamental frequency and phasor initial phase angle, frequency harmonic detection is performed on the wide-band synchronous phasor measurement device to obtain a performance test result.

[0051] In this embodiment, the above-mentioned performance test includes various types of performance tests for wideband synchronous phasor measurement devices. Among them, for frequency harmonic test, frequency harmonic detection is used to evaluate the detection ability of the wideband synchronous phasor measurement device for the harmonic components in the signal, ensuring that the device can identify and accurately analyze the fundamental wave and its harmonic components, especially the impact of high-frequency harmonics on the power system. Then the test terminal can perform frequency harmonic detection on the wideband synchronous phasor measurement device according to the phasor amplitude, fundamental frequency and phasor initial phase angle to obtain the performance test results.

[0052] Specifically, the above frequency harmonic test can be specifically expressed as:

[0053] ;

[0054] Among them, X m represents the phasor amplitude, f represents the fundamental frequency, df / dt represents the frequency change rate, and φ0 represents the phasor initial phase angle.

[0055] Through this embodiment, the test terminal can combine the phasor amplitude, fundamental frequency and phasor initial phase angle of the wide-band synchronous phasor measurement device to perform frequency harmonic detection on the wide-band synchronous phasor measurement device, thereby realizing performance testing of the wide-band synchronous phasor measurement device and improving the comprehensiveness of testing the wide-band synchronous phasor measurement device.

[0056] In one embodiment, based on the monitoring data uploaded by the wide-band synchronized phasor measurement device, a sub-supersynchronous oscillation function test is performed on the wide-band synchronized phasor measurement device to obtain an oscillation test result, including: sending a power signal including an abnormal sub-supersynchronous oscillation power value to the wide-band synchronized phasor measurement device; detecting whether the wide-band synchronized phasor measurement device generates an alarm message and a recording file corresponding to the abnormal sub-supersynchronous oscillation power value to obtain a corresponding oscillation test result.

[0057] In this embodiment, the test terminal can implement an oscillation test on the wideband synchronous phasor measurement device by sending an abnormal power signal to the wideband synchronous phasor measurement device in advance and monitoring the wideband synchronous phasor measurement device's processing method for the abnormal power signal. The test terminal can send a power signal containing an abnormal sub-supersynchronous oscillation power value to the wideband synchronous phasor measurement device; after receiving the above power signal, the wideband synchronous phasor measurement device will perform corresponding processing, and the test terminal detects whether the wideband synchronous phasor measurement device generates an alarm message and a recording file corresponding to the abnormal sub-supersynchronous oscillation power value, so that the test terminal obtains the corresponding oscillation test result according to the above detection result.

[0058] Specifically, the wideband synchronous phasor measurement device should have the function of judging sub / supersynchronous harmonic oscillation monitoring and be able to output alarm information. The test terminal's detection requirements for the wideband synchronous phasor measurement device include but are not limited to the wideband synchronous phasor measurement device should have the function of sub / supersynchronous oscillation monitoring based on sampled data, and can send the amplitude and frequency of the dominant component of sub / supersynchronous oscillation to the dispatching master station, that is, the test terminal. When subsynchronous oscillation occurs in the power system, the wideband synchronous phasor measurement device should set the trigger flag and cause in the status word of the data frame and issue a corresponding event alarm. The format can be expressed as follows: 1) Sub / supersynchronous oscillation frequency monitoring range: when using instantaneous power calculation, the frequency monitoring range: 10Hz~40Hz; when using current calculation, the frequency monitoring range: 10Hz~40Hz and 60Hz~90Hz; the frequency resolution requirement is 1Hz; 2) Sub / supersynchronous oscillation judgment criteria; the instantaneous power sub / supersynchronous oscillation component exceeds the preset threshold P and lasts for X seconds; the values ​​of P and X can be set according to actual conditions.

[0059] The oscillation test steps of the test terminal on the wide-band synchronous phasor measurement device can be specifically expressed as follows: the sub / super synchronous oscillation starting threshold value P=10%Pn is set for the tested wide-band synchronous phasor measurement device, and the duration is set to X=10; a three-phase test signal file containing interharmonics is generated by software, so that the sub / super synchronous oscillation power contained in the power signal reaches 11%Pn, and the above power signal is obtained, and the interharmonic frequency contained in the power signal is within the sub / super synchronous oscillation frequency monitoring range; Comtrade (a common format for transient data exchange in power systems) data is played back in sequence through the test terminal, and after the sub / super synchronous oscillation signal lasts for 10s, the test terminal checks whether the wide-band synchronous phasor measurement device generates event alarms and continuous recording files, thereby obtaining the oscillation test results, and the trigger flags and causes in the data status word of the dynamic recording data file can also be viewed.

[0060] Through this embodiment, the test terminal can perform an oscillation test on the wide-band synchronized phasor measurement device based on the pre-constructed abnormal power signal, thereby improving the comprehensiveness of the test of the wide-band synchronized phasor measurement device.

[0061] In one embodiment, according to the monitoring data, the corresponding harmonic test strategy is determined, including: obtaining the input fundamental frequency and harmonic type; obtaining the harmonic change range and harmonic change strategy of the wide-band synchronous phasor measurement device; the harmonic change range includes the interval of the action value and the return value of the relay corresponding to the wide-band synchronous phasor measurement device; according to the fundamental frequency, harmonic type, harmonic change range and harmonic change strategy, the harmonic test strategy corresponding to the wide-band synchronous phasor measurement device is determined.

[0062] In this embodiment, the test terminal can also perform a harmonic test on the wideband synchronized phasor measurement device. The test terminal can generate a harmonic test strategy, and the wideband synchronized phasor measurement device performs corresponding steps based on the harmonic test strategy, so that the test terminal can obtain the harmonic test result obtained after the wideband synchronized phasor measurement device performs the test based on the harmonic test strategy. The above harmonic test strategy can be generated based on the monitoring data of the wideband synchronized phasor measurement device.

[0063] The test terminal can obtain the input fundamental frequency and harmonic type, such as the fundamental frequency and harmonic type input by the user, and obtain the harmonic change range and harmonic change strategy of the wide-band synchronous phasor measurement device. Among them, the harmonic change range includes the interval of the action value and return value of the relay corresponding to the wide-band synchronous phasor measurement device. Therefore, the test terminal can determine the harmonic test strategy corresponding to the wide-band synchronous phasor measurement device according to the fundamental frequency, harmonic type, harmonic change range and harmonic change strategy.

[0064] The test terminal can send the above harmonic test strategy to the wideband synchronous phasor measurement device. The wideband synchronous phasor measurement device sets the corresponding fundamental frequency, harmonic type, and harmonic change range based on the harmonic test strategy, and performs harmonic detection based on the above set parameters and the corresponding harmonic change strategy.

[0065] Specifically, for the fundamental frequency and harmonic type mentioned above, the test terminal provides a variety of variable change methods, including but not limited to manual change and automatic change. The test terminal can set the fundamental frequency during harmonic testing to the power frequency 50Hz, or to 50Hz or 60Hz; harmonic selection is the selection of the above harmonic type, and the selected variables include DC, fundamental, 2nd harmonic-50th harmonic and interharmonic, etc.

[0066] Among them, harmonic change strategies include manual determination and automatic determination. The process of manually determining the change includes voltage selection, current selection and step size. The step size setting includes: setting the step size of each step change of the variable; selecting the appropriate step size according to the test requirements. The smaller the step size, the higher the test accuracy. The process of automatically determining the change includes automatically controlling the "current variable" on behalf of the user based on the automatic setting; the time of each step here cannot guarantee a high accuracy, and varies with performance, with an error of about 50ms or more; the range of change is the above-mentioned harmonic change range. For the harmonic change range, the test terminal can set the starting and end points of the variable change. The starting point can be greater than the end point or less than the end point; the setting of the change range should be able to cover the action / return value range of the relay;

[0067] The above harmonic change strategy includes the change mode and the action return mode. For the change mode: by setting the change mode of the change amount, "start" is the starting point of the change range, "end" is the end point, "start→end" is a one-way change, and only the action value can be measured; "start→end→start" is a two-way change, and the action value and return value can be measured at the same time, and the return coefficient / or sensitivity angle can be automatically calculated; for the action return, that is, the return mode of the variable is set, and the variable is in the process of changing from the starting point to the end point. Once the action of the relay is detected, it is automatically determined whether to continue the test according to the change mode. For example, the change mode is "start→end": end the test; the change mode is "start→end→start": change the change direction of the variable and return to the starting point; that is, "full change"; during the test, regardless of whether the relay is actuated or not, the variable changes according to the set change range until it reaches the end point or returns to the starting point, thereby realizing the harmonic test of the wide-band synchronous phasor measurement device.

[0068] Through this embodiment, the test terminal performs harmonic testing on the wide-band synchronous phasor measurement device by combining fundamental frequency, harmonic type, harmonic variation range and harmonic variation strategy, thereby improving the comprehensiveness of testing the wide-band synchronous phasor measurement device.

[0069] In one embodiment, based on the monitoring data uploaded by the wide-band synchronous phasor measurement device, the wide-band synchronous phasor measurement device is subjected to performance testing, oscillation testing and harmonic testing, and after obtaining the corresponding test results, it also includes: determining a first waveform playback interval based on the test results; the first waveform playback interval represents a waveform interval before an abnormality occurs in the wide-band synchronous phasor measurement device; obtaining a first recording recorded for the wide-band synchronous phasor measurement device, and determining a second recording recorded by the wide-band synchronous phasor measurement device based on the test results; determining a second waveform playback interval based on a comparison between the first recording and the second recording; repeatedly outputting a waveform corresponding to the first waveform playback interval, and when a waveform playback instruction is detected, playing a waveform corresponding to the second waveform playback interval.

[0070] In this embodiment, after obtaining the above test results, the test terminal can also perform waveform playback based on the test results. The above waveform playback can be triggered based on an instruction, and before the trigger instruction is detected, the test terminal can play back a specific waveform. For example, the test terminal can determine a first waveform playback interval based on the test results. The first waveform playback interval represents the waveform interval before the abnormality occurs in the wide-band synchronized phasor measurement device. The test terminal can also obtain a first recording recorded for the wide-band synchronized phasor measurement device, and determine a second recording recorded by the wide-band synchronized phasor measurement device based on the test results; thereby the test terminal determines the second waveform playback interval based on the comparison between the first recording and the second recording.

[0071] The test terminal may repeatedly output the waveform corresponding to the first waveform playback interval before the waveform playback instruction is triggered, and play the waveform corresponding to the second waveform playback interval when the waveform playback instruction is detected.

[0072] Specifically, the test terminal is provided with a waveform playback module and a substation simulation module. The test terminal can play back the waveform data file generated by the waveform playback module or the simulation calculation of the substation simulation module, and view the test results of the relevant items through the test log. Among them, the waveform playback module can intercept a certain waveform interval of the original waveform for waveform playback.

[0073] Among them, during the GPS (Global Positioning System) timing process, the starting time of the original recording files at both ends of the test terminal and the wide-band synchronous phasor measurement device (the first recording of the test terminal and the second recording of the wide-band synchronous phasor measurement device) may deviate. Therefore, when replaying, you cannot simply start from the starting point of the original recording. Instead, you need to compare the waveforms at both ends to determine the actual playback starting time, and then determine the playback interval of the second waveform.

[0074] Among them, recorder manufacturers mostly use compression to store waveforms, that is, after the recording is triggered, after a certain delay, what is stored in the recording file is no longer the sampling point, but the effective value or maximum value customized by the manufacturer. In order to ensure the COMTRADE standard, the playback software will process it as an instantaneous value, which will cause the voltage and current after the fault to be displayed as DC. In this case, in order to ensure the normal progress of the playback test, it is necessary to set the end point of the playback interval to abandon this compressed and unreal recording.

[0075] A button for automatically simulating the pre-fault state can be set in the test terminal. If selected, the test terminal will automatically repeat the first cycle data of the "playback interval" before the playback is triggered, that is, the waveform of the first waveform playback interval mentioned above, to simulate the pre-fault state; otherwise, the tester outputs the 0 state before the playback is triggered.

[0076] The test terminal can also be set with a repeat interval function, which provides a waveform repeat output function of up to 2 intervals without changing the total recorded waveform length; if more repeat intervals are needed, it can be achieved through the copy function in the "Waveform Editing", but it will lead to an increase in the original recording length.

[0077] The test terminal can also determine the starting point of the interval, which can be the starting point of the interval to be repeated and its position in the original waveform; the test terminal can also determine the length, that is, the time length of the interval to be repeated; in order to ensure the smoothness of the waveform, the test terminal takes an integer multiple of the length of each cycle as the length. The test terminal can also determine the total number of outputs, for example, the total number of outputs of the interval to be repeated is at least 1, which is equivalent to no repetition, and at most 3000 times.

[0078] For setting the start mode of the waveform playback test, the test terminal provides a variety of triggering modes, including but not limited to key triggering: the tester maintains the pre-fault state or 0 state, and waits for the user to press the confirmation key to trigger the waveform playback; time triggering: the tester maintains the pre-fault state or 0 state, and the waveform playback is triggered after the "pre-fault time" is reached; generally, the pre-fault time should be set greater than the protection reset time, which is about 20 to 25 seconds to ensure reliable protection reset; PPM pulse triggering: after the GPS timing is successful, the tester maintains the pre-fault state or 0 state; the two parties of the test contact and press the confirmation key at any moment between 10 and 50 seconds within the same minute; the test terminal detects the first PPM (pulse-phase modulation) pulse after confirmation and triggers the waveform playback. It can also include open-in contact flip triggering: the test terminal maintains the pre-fault state or 0 state, and after the set open-in flip condition is met, the waveform playback is triggered, thereby realizing the waveform playback of the second waveform playback interval.

[0079] Through this embodiment, the test terminal can use the waveform comparison between the local end and the wide-band synchronous phasor measurement device end to determine the waveform playback mode, and play back a specific playback waveform before the playback instruction is triggered, thereby analyzing the test results of the wide-band synchronous phasor measurement device based on the played back waveform, thereby improving the comprehensiveness of the test of the wide-band synchronous phasor measurement device.

[0080] In an exemplary embodiment, Figure 3 As shown, Figure 3The figure is an interface diagram of a test terminal in an embodiment. The test terminal includes a manual test module, an automatic test module, a communication monitoring module, a protocol test module, a power oscillation module, a harmonic test module, a waveform playback module, a substation simulation module and a menu bar. The menu bar includes, but is not limited to, options such as file, view, configuration, help, variable, startup, primary value, light load and exit. The file option is used for creating, opening and saving test states. New: used to create a new test interface; Open: can open the saved interface settings; Save: used to save the current interface settings; Save as: save the current interface settings to another path; Exit: exit the current menu. The view option is used to open various views, including: report view: used to view test reports; result view: used to view test results; output tracking: used to view the current output voltage and current values; test log: used to view test logs and alarm information. Configuration options include IP (Internet Protocol, network interconnection protocol) configuration: view and set IP address for equipment online operation; system configuration: configure system parameters; 61850 configuration: configure IEC-61850 program. The IEC61850 standard is a global standard in the field of power system automation.

[0081] The variable option includes a variety of variable settings; the start option is used to start / stop the test multiplexing button, which is used to start / stop the test; the primary value option represents the primary value / secondary value multiplexing button, which is used to switch the primary value / secondary value; the light load option includes the current source load capacity switching button, which is used to switch light load / heavy load / super heavy load; among them, light load: the current current source operating mode is light load operation; heavy load: the current current source operating mode is heavy load operation; super heavy load: the current current source operating mode is super heavy load operation (only dual-module testers support super heavy load mode); the exit option is used to exit the current menu.

[0082] The above-mentioned test terminal also has a test window, a test terminal operation status monitoring, and a switch quantity status indicator. Among them, the test window is used to set the test parameters, including the voltage and current values ​​of each channel, test control and other parameters. The tester operation status monitoring mainly includes three operation status monitorings: operation, voltage alarm, and current alarm. The switch quantity status indicator is used to display the current status of the input and output quantities, including the input quantity disconnection / closing, the output quantity disconnection / closing, etc. The fundamental wave can set and display the amplitude, angle, and frequency of the current voltage and current of each channel in real time. The parameters include voltage Ua, Ub, Uc; Ux, Uy, Uz; current Ia, Ib, Ic; Ix, Iy, Iz; where az represents each channel; DC output Ir, amplitude: set the Ir channel to DC output, and set the amplitude as needed. The test terminal displays the output amplitude, angle, and system frequency of the phase voltage (current) of each channel in digital form. During the test, various parameters can be modified and adjusted in real time as needed.

[0083] The test terminal can realize the output of various data. For basic output, it can include the setting of variation and key phase pulse. Among them, for the setting of variation, it includes variation, step, output time, F6, F7 and lock setting. Among them, the variation is used to select variables in the test process, such as the amplitude, phase and frequency of phase voltage Uabc and phase current Iabc; the step is used to set the step size of each step change of the variable. Generally, the appropriate step size is selected according to the test requirements. The smaller the step size, the higher the test accuracy. It can be set to absolute value / relative value change as needed. The output time is used to set the holding time of the current parameter output. F6 and F7 are used to reduce / increase the variable according to the step size. Lock is used to output the lock button. The test terminal will keep the current output value unchanged and will not process the modification of the parameter value on the interface side until the lock is released. When you need to change multiple variable values ​​at the same time, you can first click this button to lock the output, then modify multiple variable values, and finally click this button to unlock and output multiple variable values ​​at the same time.

[0084] The key phase pulse settings include: output selection: select the fast channel to be used, it is recommended to select the fast output channel; frequency: set the frequency of the pulse, the default is 0Hz; phase: set the trigger angle of the pulse relative to the sine wave; forward pulse width (ms): set the forward pulse width; phase compensation (°): set the angle compensation, generally the default is 0°; tester operation mode: the default is PPS synchronization: because all PMU-related performance tests need to be tested under the synchronized state, the tester software defaults to PPS (pulse per second) synchronization mode to output the test normally; add voltage and current group: when the number of voltage and current channels in the software interface is inconsistent with the actual number of hardware channels, you can use this button to add software interface channels for corresponding parameter settings; keep the waveform continuous when the frequency changes: tick "√" to indicate that the waveform remains continuous when the frequency changes; not ticking "√" means that the waveform may be distorted when the frequency changes.

[0085] The above test device can be implemented as follows Figure 4 The steps of the method shown are: Figure 4 FIG. 1 is a flow chart of a test method of a broadband synchronized phasor measurement device in another embodiment. In this embodiment, the following steps are included:

[0086] Step 1: Click the communication monitoring module, and the communication monitoring module will establish a TCP connection with the substation simulation module; configure "PMU substation configuration", set the communication parameters of the substation in the menu bar'Configuration'-'Communication Configuration', and click 'Connect Substation' after the settings are completed to confirm the trigger connection command;

[0087] Step 2: Configure the CFG file; the CFG file represents a recording file in the CFG format. In the menu bar, click 'Configuration' - 'CFG Configuration', and in the CFG file configuration interface, select the PMU device data to be monitored according to the operation prompts to generate the CFG-2 file; after establishing a TCP connection with the PMU device, use the 'Auto Summon' on the toolbar to automatically add all channels configured in the CFG-1 file of the PMU device to CFG-2, and monitor the real-time data of all channels of the PMU device;

[0088] Step 3: Real-time data monitoring of channels; after the real-time data transmission is turned on, monitor the channel values ​​configured in the CFG-2 file in the real-time data interface. The channel time and amplitude are updated in real time as the message is uploaded, and the above monitoring data is obtained; the channel amplitude defaults to the primary value, and click the 'Secondary Value' in the menu bar to display the secondary value; the PT / CT ratio of the channel is set in 'Configuration'-'PT / CT Configuration';

[0089] Step 4: Perform protocol test through the protocol test module; set the local IP address and the substation IP address in the same network segment, and check whether they can be pinged; if they can be pinged, fill in the substation identifier, real-time data port number and command port number, and after ensuring that they are correct, click the connect button to establish a connection with the PMU device; start the test after the connection is established, and after clicking Start Test, the software will perform tests in sequence according to the test item list;

[0090] Step 5: Perform an oscillation test through a manual test module or an automatic test module; the power oscillation module is used to test low-frequency oscillation, subsynchronous oscillation, supersynchronous oscillation, and broadband oscillation;

[0091] Step 6: Perform harmonic test through manual test module or automatic test module; harmonic test module is used to verify the test device's response to harmonics or DC, including harmonic sampling accuracy check; action / return value test; use output lock function to test action / return time;

[0092] Step 7: Play back the waveform data file recorded by the waveform playback module or generated by the simulation calculation of the substation simulation module, and view the test results of related projects through the detection log.

[0093] Among them, the manual test module is used to set the amplitude, angle and frequency of voltage and current, and realize the static performance detection and dynamic performance detection of the synchronous phasor measurement device, including measurement accuracy detection under various conditions, amplitude step response time detection, phase angle step response time detection, amplitude modulation detection, phase angle modulation detection, amplitude and phase angle simultaneous modulation detection, frequency harmonic detection, healthy phase pulse detection, low-frequency oscillation alarm function detection, sub / super synchronous oscillation function detection, etc.

[0094] The test is carried out through the automatic test module, including the following steps: the first step: open the automatic test program and create a new test task; the second step: execute the on-site test task; select the protection model to be tested, load the protection equipment data model, and collect relevant equipment data such as the protection call setting; the third step: execute each test item one by one according to the test task prompt; for the protection logic test item, the system prompts wiring, switching protection pressure plate, and modifying control words; the fourth step: drive the tester output, automatically complete the protection logic test and record the results; the fifth step: automatically evaluate the test results and fill in the report; the sixth step: after the test is completed, a test report in a standard format is automatically generated. Among them, when the test terminal performs an oscillation test, the corresponding parameters can be set, including the oscillation type and the oscillation modulation frequency, which can be set to four oscillation modes: when performing low-frequency oscillation, the oscillation modulation frequency setting range is: 0.1-2.5Hz; when performing sub-synchronous oscillation, the oscillation modulation frequency setting range is: 2.5-45.0Hz; when performing super-synchronous oscillation, the oscillation modulation frequency setting range is: 55.0-95.0Hz; when performing wide-band oscillation, the oscillation modulation frequency setting range is: 100.0-300.0Hz.

[0095] You can also set the oscillation starting angle, which is 0° by default and can be set according to actual needs; the impedance angle, which is the angle between voltage and current, is 30° by default and can be set according to actual needs.

[0096] It also includes the settings of fundamental voltage and current, including voltage amplitude, setting the three-phase voltage amplitude, and the default three-phase voltage is symmetrical; current amplitude, setting the three-phase current amplitude, and the default three-phase current is symmetrical; fundamental frequency, setting the fundamental frequency, the default is 50Hz.

[0097] It also includes the settings of interharmonic voltage and current, including voltage amplitude, setting the voltage amplitude corresponding to the interharmonic, and the default is three-phase symmetry; current amplitude, setting the current amplitude corresponding to the interharmonic, and the default is three-phase symmetry; interharmonic frequency, setting the frequency of the interharmonic, and the default is automatically calculated based on the fundamental frequency and the oscillation modulation frequency.

[0098] Also, the tester operating mode is set to PPS synchronization by default: Since PMU-related performance tests need to be performed in a synchronized state, the tester software defaults to PPS synchronization mode to output the test normally.

[0099] For harmonic testing, the test terminal provides manual and automatic changes. The test terminal can set the fundamental frequency during harmonic testing to the power frequency 50Hz, or to 50Hz or 60Hz; harmonic selection is the selection of the above harmonic type, and the selected variables include DC, fundamental wave, 2nd harmonic-50th harmonic and interharmonic.

[0100] Among them, harmonic change strategies include manual determination and automatic determination. The process of manually determining the change includes voltage selection, current selection and step size. The step size setting includes: setting the step size of each step change of the variable; selecting the appropriate step size according to the test requirements. The smaller the step size, the higher the test accuracy. The process of automatically determining the change includes automatically controlling the "current variable" on behalf of the user based on the automatic setting; the time of each step here cannot guarantee a high accuracy, and varies with performance, with an error of about 50ms or more; the range of change is the above-mentioned harmonic change range. For the harmonic change range, the test terminal can set the starting and end points of the variable change. The starting point can be greater than the end point or less than the end point; the setting of the change range should be able to cover the action / return value range of the relay;

[0101] The above harmonic change strategy includes the change mode and the action return mode. For the change mode: by setting the change mode of the change amount, "start" is the starting point of the change range, "end" is the end point, "start→end" is a one-way change, and only the action value can be measured; "start→end→start" is a two-way change, and the action value and return value can be measured at the same time, and the return coefficient / or sensitivity angle can be automatically calculated; for the action return, that is, the return mode of the variable is set, and the variable is in the process of changing from the starting point to the end point. Once the action of the relay is detected, it is automatically determined whether to continue the test according to the change mode. For example, the change mode is "start→end": end the test; the change mode is "start→end→start": change the change direction of the variable and return to the starting point; that is, "full change"; during the test, regardless of whether the relay is actuated or not, the variable changes according to the set change range until it reaches the end point or returns to the starting point, thereby realizing the harmonic test of the wide-band synchronous phasor measurement device.

[0102] The test terminal can also perform test control of waveform playback, that is, intercept a certain section of the original waveform for waveform playback. In the process of GPS timing, the starting time of the original recording files at both ends of the test terminal and the wide-band synchronous phasor measurement device (the first recording of the test terminal and the second recording of the wide-band synchronous phasor measurement device) may deviate, so the playback cannot simply start from the starting point of the original recording, but by comparing the waveforms at both ends, the actual playback starting time is determined, and then the second waveform playback interval is determined.

[0103] Among them, recorder manufacturers mostly use compression to store waveforms, that is, after the recording is triggered, after a certain delay, what is stored in the recording file is no longer the sampling point, but the effective value or maximum value customized by the manufacturer. In order to ensure the COMTRADE standard, the playback software will process it as an instantaneous value, which will cause the voltage and current after the fault to be displayed as DC. In this case, in order to ensure the normal progress of the playback test, it is necessary to set the end point of the playback interval to abandon this compressed and unreal recording.

[0104] A button for automatically simulating the pre-fault state can be set in the test terminal. If selected, the test terminal will automatically repeat the first cycle data of the "playback interval" before the playback is triggered, that is, the waveform of the first waveform playback interval mentioned above, to simulate the pre-fault state; otherwise, the tester outputs the 0 state before the playback is triggered.

[0105] The test terminal can also be set with a repeat interval function, which provides a waveform repeat output function of up to 2 intervals without changing the total recorded waveform length; if more repeat intervals are needed, it can be achieved through the copy function in the "Waveform Editing", but it will lead to an increase in the original recording length.

[0106] The test terminal can also determine the starting point of the interval, which can be the starting point of the interval to be repeated and its position in the original waveform; the test terminal can also determine the length, that is, the time length of the interval to be repeated; in order to ensure the smoothness of the waveform, the test terminal takes an integer multiple of the length of each cycle as the length. The test terminal can also determine the total number of outputs, for example, the total number of outputs of the interval to be repeated is at least 1, which is equivalent to no repetition, and at most 3000 times.

[0107] For setting the start mode of the waveform playback test, the test terminal provides a variety of triggering modes, including but not limited to key triggering: the tester maintains the pre-fault state or 0 state, and waits for the user to press the confirmation key to trigger the waveform playback; time triggering: the tester maintains the pre-fault state or 0 state, and the waveform playback is triggered after the "pre-fault time" is reached; generally, the pre-fault time should be set greater than the protection reset time, which is about 20 to 25 seconds to ensure reliable protection reset; PPM pulse triggering: after the GPS timing is successful, the tester maintains the pre-fault state or 0 state; the two parties of the test contact and press the confirmation key at any moment between 10 and 50 seconds within the same minute; the test terminal detects the first PPM (pulse-phase modulation) pulse after confirmation and triggers the waveform playback. It can also include open-in contact flip triggering: the test terminal maintains the pre-fault state or 0 state, and after the set open-in flip condition is met, the waveform playback is triggered, thereby realizing the waveform playback of the second waveform playback interval.

[0108] This application uses dual network ports, and automatic testing does not require an external switch; it supports up to 50th harmonic output, and can simultaneously superimpose interharmonics; it can output three-phase AC voltage and current signals with an accuracy of 0.05%. The signal frequency, amplitude, and phase angle are adjustable. The phase angle setting of the signal conforms to the definition of synchronous phasor angle; the frequency, amplitude, and phase angle of the three-phase AC signal output by the test device can achieve step changes, and the transition moment is synchronized with the PPS pulse signal; the test device can superimpose 2 to 50th harmonic components, or 10 to 1000Hz interharmonics on the three-phase AC fundamental signal; the three-phase AC voltage signal can be amplitude modulated, frequency modulated, phase angle modulated, and amplitude and phase angle synchronously modulated; the frequency of the three-phase AC signal can be linearly gradient; the test device can simultaneously simulate the generator terminal voltage and key phase pulse signal, and the phase angle is controllable. It meets the requirements of the generator internal potential and power angle error test function of the PMU device; it can control 6 switch outputs and monitor 8 switch inputs; it has closed-loop automatic testing functions, including static testing functions such as voltage and current amplitude and phase angle testing, frequency accuracy testing, power accuracy testing, harmonic interference testing, and dynamic testing functions such as amplitude modulation, phase angle modulation, step testing, frequency ramp testing, and out-of-band signal interference testing, and can automatically generate test reports; the master station simulation software can obtain the phasor data sent by the PMU in real time, that is, monitoring data, with a maximum acquisition speed of 100 frames per second. The test terminal has the function of automatically verifying the power frequency electricity according to the preset inspection plan, and the verification data has the function of saving and exporting. It provides an effective, reliable, comprehensive, fast, convenient, standardized and standardized testing method for the steady-state performance and dynamic performance testing of the PMU.

[0109] Among them, the wide-band synchronous phasor measurement device has an AC output overload protection function; when the voltage output is short-circuited or the output is overloaded, the device sends out a buzzer alarm signal and the alarm signal light flashes; the device has an overheating protection function; when the device overheats, the device sends out a buzzer alarm signal and the alarm signal light flashes; after the alarm, the device automatically stops output; the device has automatic current open circuit protection and current open circuit detection functions.

[0110] Through the above-mentioned embodiment, the test terminal establishes a connection with the wide-band synchronous phasor measurement device based on the protocol test by responding to the connection instruction, and performs an oscillation test and a harmonic test on the wide-band synchronous phasor measurement device based on the monitoring data uploaded by the wide-band synchronous phasor measurement device, thereby achieving the technical effect of improving the comprehensiveness of the test of the wide-band synchronous phasor measurement device.

[0111] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0112] Based on the same inventive concept, the embodiment of the present application also provides a test device for a wide-band synchronized phasor measurement device for implementing the test method for the wide-band synchronized phasor measurement device involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiments of the test device for one or more wide-band synchronized phasor measurement devices provided below can refer to the limitations of the test method for the wide-band synchronized phasor measurement device above, and will not be repeated here.

[0113] In an exemplary embodiment, Figure 5 As shown, a test device for a wide-band synchronous phasor measurement device is provided, comprising: a response module 500, a connection module 502 and a test module 504, wherein:

[0114] The response module 500 is used to determine the type of monitoring data of the wide-frequency synchronized phasor measurement device in response to a connection instruction for the wide-frequency synchronized phasor measurement device.

[0115] The connection module 502 is used to establish a connection with the wide-band synchronized phasor measurement device according to the protocol test with the wide-band synchronized phasor measurement device; the wide-band synchronized phasor measurement device is used to upload monitoring data corresponding to the type.

[0116] The testing module 504 is used to perform performance testing, oscillation testing and harmonic wave testing on the wide-band synchronized phasor measurement device according to the monitoring data uploaded by the wide-band synchronized phasor measurement device, and obtain corresponding test results.

[0117] In one embodiment, the above-mentioned test module 504 is used to perform one or more of amplitude modulation detection, phase angle modulation detection and frequency harmonic detection on the wide-band synchronous phasor measurement device according to the monitoring data uploaded by the wide-band synchronous phasor measurement device to obtain a performance test result; perform sub-supersynchronous oscillation function detection on the wide-band synchronous phasor measurement device according to the monitoring data uploaded by the wide-band synchronous phasor measurement device to obtain an oscillation test result; determine a corresponding harmonic test strategy according to the monitoring data; send the harmonic test strategy to the wide-band synchronous phasor measurement device to obtain the harmonic test result returned by the wide-band synchronous phasor measurement device after the test according to the harmonic test strategy; obtain the test result corresponding to the wide-band synchronous phasor measurement device according to the performance test result, the oscillation test result and the harmonic test result.

[0118] In one embodiment, the above-mentioned test module 504 is used to perform amplitude modulation detection and phase angle modulation detection on the wide-band synchronous phasor measurement device according to the phasor amplitude, amplitude modulation depth, modulation frequency, initial phase angle of the modulation part, fundamental frequency and phasor initial phase angle to obtain performance test results.

[0119] In one embodiment, the test module 504 is used to perform frequency harmonic detection on the wideband synchronous phasor measurement device according to the phasor amplitude, fundamental frequency and phasor initial phase angle to obtain a performance test result.

[0120] In one embodiment, the test module 504 is used to send a power signal including an abnormal sub-supersynchronous oscillation power value to a wide-band synchronized phasor measurement device; detect whether the wide-band synchronized phasor measurement device generates alarm information and a recording file corresponding to the abnormal sub-supersynchronous oscillation power value, and obtain a corresponding oscillation test result.

[0121] In one embodiment, the above-mentioned test module 504 is used to obtain the input fundamental frequency and harmonic type; obtain the harmonic change range and harmonic change strategy of the wide-band synchronous phasor measurement device; the harmonic change range includes the interval of the action value and return value of the relay corresponding to the wide-band synchronous phasor measurement device; determine the harmonic test strategy corresponding to the wide-band synchronous phasor measurement device according to the fundamental frequency, harmonic type, harmonic change range and harmonic change strategy.

[0122] In one embodiment, the above-mentioned device also includes: a playback module, which is used to determine a first waveform playback interval according to the test results; the first waveform playback interval represents the waveform interval before the abnormality occurs in the wide-band synchronous phasor measurement device; obtain a first recording recorded for the wide-band synchronous phasor measurement device, and determine a second recording recorded by the wide-band synchronous phasor measurement device according to the test results; determine the second waveform playback interval based on the comparison between the first recording and the second recording; repeatedly output the waveform corresponding to the first waveform playback interval, and when a waveform playback instruction is detected, play the waveform corresponding to the second waveform playback interval.

[0123] Each module in the test device of the above-mentioned wide-band synchronous phasor measurement device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each of the above modules.

[0124] In an exemplary embodiment, a computer device is provided. The computer device may be a test terminal, and its internal structure diagram may be as shown in FIG. Figure 6 As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a test method for a broadband synchronous phasor measurement device is implemented. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0125] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0126] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the above-mentioned test method of the wide-band synchronous phasor measurement device when executing the computer program.

[0127] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the test method of the wide-band synchronized phasor measurement device is implemented.

[0128] In one embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the computer program implements the above-mentioned test method of the wide-band synchronized phasor measurement device.

[0129] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0130] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0131] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0132] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for testing a broadband synchronized phasor measurement device, characterized in that: The method comprises: In response to a connection instruction for a wide-frequency synchronized phasor measurement device, determining a type of monitoring data of the wide-frequency synchronized phasor measurement device; Establishing a connection with the broadband synchronized phasor measurement device according to a protocol test with the broadband synchronized phasor measurement device; the broadband synchronized phasor measurement device is used to upload monitoring data corresponding to the type; According to the monitoring data uploaded by the wide-band synchronous phasor measurement device, a performance test, an oscillation test and a harmonic wave test are performed on the wide-band synchronous phasor measurement device to obtain corresponding test results.

2. The method according to claim 1, characterized in that The performing of a performance test, an oscillation test and a harmonic wave test on the wide-band synchronized phasor measurement device according to the monitoring data uploaded by the wide-band synchronized phasor measurement device to obtain corresponding test results includes: According to the monitoring data uploaded by the wide-band synchronized phasor measurement device, one or more of amplitude modulation detection, phase angle modulation detection and frequency harmonic detection are performed on the wide-band synchronized phasor measurement device to obtain a performance test result; According to the monitoring data uploaded by the wide-band synchronous phasor measurement device, a sub-supersynchronous oscillation function test is performed on the wide-band synchronous phasor measurement device to obtain an oscillation test result; Determine a corresponding harmonic test strategy according to the monitoring data; Sending the harmonic test strategy to the wide-band synchronized phasor measurement device, and obtaining the harmonic test result returned by the wide-band synchronized phasor measurement device after testing according to the harmonic test strategy; According to the performance test result, the oscillation test result and the harmonic test result, the test result corresponding to the wide-band synchronous phasor measurement device is obtained.

3. The method according to claim 2, characterized in that The monitoring data includes one or more of the phasor amplitude, amplitude modulation depth, modulation frequency, initial phase angle of the modulation part, fundamental frequency and phasor initial phase angle of the wide-band synchronous phasor measurement device; The method of performing one or more of amplitude modulation detection, phase angle modulation detection and frequency harmonic detection on the wide-band synchronized phasor measurement device according to the monitoring data uploaded by the wide-band synchronized phasor measurement device to obtain a performance test result includes: According to the phasor amplitude, the amplitude modulation depth, the modulation frequency, the initial phase angle of the modulation part, the fundamental frequency and the phasor initial phase angle, the wide-band synchronous phasor measurement device is subjected to amplitude modulation detection and phase angle modulation detection to obtain the performance test result.

4. The method according to claim 3, characterized in that The method of performing one or more of amplitude modulation detection, phase angle modulation detection and frequency harmonic detection on the wide-band synchronized phasor measurement device according to the monitoring data uploaded by the wide-band synchronized phasor measurement device to obtain a performance test result includes: According to the phasor amplitude, the fundamental frequency and the phasor initial phase angle, frequency harmonic detection is performed on the wide-band synchronous phasor measurement device to obtain the performance test result.

5. The method according to claim 2, characterized in that: The method of performing sub-supersynchronous oscillation function detection on the wide-band synchronized phasor measurement device according to the monitoring data uploaded by the wide-band synchronized phasor measurement device to obtain an oscillation test result includes: sending a power signal including an abnormal sub-supersynchronous oscillation power value to the wide-band synchronized phasor measurement device; It is detected whether the wideband synchronized phasor measurement device generates alarm information and a wave recording file corresponding to the abnormal sub-supersynchronous oscillation power value, and a corresponding oscillation test result is obtained.

6. The method according to claim 2, characterized in that Determining a corresponding harmonic test strategy according to the monitoring data includes: Get the input fundamental frequency and harmonic type; Acquire the harmonic variation range and harmonic variation strategy of the wide-band synchronous phasor measurement device; the harmonic variation range includes the interval of the action value and the return value of the relay corresponding to the wide-band synchronous phasor measurement device; A harmonic test strategy corresponding to the wide-band synchronous phasor measurement device is determined according to the fundamental frequency, the harmonic type, the harmonic variation range and the harmonic variation strategy.

7. The method according to any one of claims 1 to 6, characterized in that: According to the monitoring data uploaded by the wide-band synchronized phasor measurement device, the wide-band synchronized phasor measurement device is subjected to performance testing, oscillation testing and harmonic wave testing, and after obtaining corresponding test results, the method further includes: Determine a first waveform playback interval according to the test result; the first waveform playback interval represents the waveform interval before the wide-band synchronous phasor measurement device becomes abnormal; Acquire a first recording wave recorded for the wide-band synchronized phasor measurement device, and determine a second recording wave recorded for the wide-band synchronized phasor measurement device according to the test result; Determining a second waveform playback interval based on a comparison between the first waveform recording and the second waveform recording; The waveform corresponding to the first waveform playback interval is repeatedly output, and when a waveform playback instruction is detected, the waveform corresponding to the second waveform playback interval is played.

8. A test device for a broadband synchronized phasor measurement device, characterized in that: The device comprises: A response module, configured to determine the type of monitoring data of the wide-frequency synchronized phasor measurement device in response to a connection instruction for the wide-frequency synchronized phasor measurement device; A connection module, used to establish a connection with the wide-band synchronized phasor measurement device according to a protocol test with the wide-band synchronized phasor measurement device; the wide-band synchronized phasor measurement device is used to upload monitoring data corresponding to the type; The test module is used to perform performance test, oscillation test and harmonic wave test on the wide-band synchronous phasor measurement device according to the monitoring data uploaded by the wide-band synchronous phasor measurement device to obtain corresponding test results.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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