CN113805050A - Phase selection closing angle monitoring method and device, computer equipment and storage medium - Google Patents
Phase selection closing angle monitoring method and device, computer equipment and storage medium Download PDFInfo
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Abstract
The application relates to a phase selection closing angle monitoring method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring a wave recording file of a wave recorder; determining a channel of a shifted breaker according to the wave recording file; and determining a phase selection closing angle corresponding to the shifted circuit breaker channel according to the wave recording data corresponding to the shifted circuit breaker channel, wherein the wave recording file comprises the wave recording data. Under the condition that other extra hardware configuration is not needed, the recorded circuit breaker channel with the displacement is found by acquiring the recording file in the wave recorder, and the recording data corresponding to each circuit breaker channel with the displacement is analyzed, so that the phase selection closing angle of each circuit breaker channel with the displacement is monitored in a simple, economic and efficient mode, and the purpose of online monitoring of the phase selection closing angle of the circuit breaker is achieved.
Description
Technical Field
The present disclosure relates to the field of power equipment monitoring technologies, and in particular, to a closing angle monitoring device and monitoring method, a computer device, and a storage medium.
Background
The circuit breaker is an electrical appliance which can open, close and carry normal current in an operating state, and can carry, close and open abnormal current (such as short-circuit current) within a specified time. The system is an important link for the mutual connection of power generation, power transmission, power distribution and power utilization, and the stability and the reliability of the system have very important significance for the safety and the reliability of a power grid. Statistics over the last decade show that the average current loss per breaker accident reaches millions of kilowatts, which results in losses thousands or even tens of thousands of times the price of the equipment itself. Therefore, the electric power operation department puts more urgent and strict requirements on ensuring the operation reliability of the circuit breaker.
According to actual operation experience and statistical data, large-capacity capacitive and inductive equipment can generate large harmonic waves, inrush currents and overvoltage impacts in the switching-on and switching-off processes of the circuit breakers, and equipment is easy to damage. In order to reduce inrush current impact and transient overvoltage generated by an alternating current filter and a transformer in the switching-on and switching-off process of a circuit breaker, a phase-selecting switching-on and switching-off device is usually configured for switching-on and switching-off control of the circuit breaker to realize stable switching-on and switching-off of capacitive and inductive devices. The phase selection switching-on and switching-off device collects reference voltage in real time, randomly receives a switching-on and switching-off command from the measurement and control device, and can always perform switching-on and switching-off at a preset voltage phase after the switching-on and switching-off command is processed by the device, so that the problems of transient overvoltage and overcurrent caused by random switching-on and switching-off can be effectively avoided.
However, due to the mechanical characteristics of the circuit breaker and the influence of sensors and configurations of the phase selection switching-on and switching-off devices, the circuit breaker is not always switched on at the optimal switching-on angle every time, and thus, the unreasonable phase selection of the circuit breaker may cause transient overvoltage or overcurrent of the system. The phase selection closing angle of the circuit breaker is particularly important for detecting an ac filter in a high voltage dc converter station, since in a converter station, the harmonic current flowing into the ac system is generally limited by an ac filter mounted on the ac bus and reactive compensation is provided for the dc converter valves. Along with the change of the transmission power of the direct current transmission system, the reactive compensation required to be provided can be correspondingly changed, so that the alternating current filter of the converter station needs to be frequently switched on and off, and the system and the capacitor are impacted when the breaker is switched on and off every time, so that the phase selection and closing angle of the breaker needs to be monitored in real time.
Disclosure of Invention
Therefore, it is necessary to provide a method and an apparatus, a computer device, and a storage medium capable of accurately monitoring the phase selection closing angle of the circuit breaker, so as to realize real-time monitoring of the phase selection closing angle of the circuit breaker and timely find the phase selection closing problem, in order to solve the technical problem that the closing angle of the circuit breaker may be inaccurate.
In a first aspect, an embodiment of the present application provides a phase selection closing angle monitoring method, including:
acquiring a wave recording file of a wave recorder;
determining a channel of a shifted breaker according to the wave recording file;
and determining a phase selection closing angle corresponding to the shifted circuit breaker channel according to the recording data corresponding to the shifted circuit breaker channel, wherein the recording file comprises the recording data.
The various electrical quantities of each phase channel of the circuit breaker in the switching-on and switching-off process are recorded in the wave recorder, under the condition that other extra hardware configuration is not needed, the recorded circuit breaker channel with the displacement is found by acquiring the wave recording file in the wave recorder, and wave recording data corresponding to each circuit breaker channel with the displacement is analyzed, so that the phase selection switching-on angle of each circuit breaker channel with the displacement is monitored in a simple, economic and efficient mode, and the purpose of online monitoring of the phase selection switching-on angle of the circuit breaker is achieved.
In one embodiment of the first aspect, the recording file includes displacement data of each breaker channel; according to the recording file, the circuit breaker channel determining the displacement comprises the following steps:
finding each circuit breaker channel from the wave recording file according to preset keywords;
and determining the shifted breaker channel according to the shift data corresponding to each breaker channel.
In one embodiment of the first aspect, the recording data corresponding to the shifted breaker channel includes current data of each phase, voltage data of each phase, and phase data of each phase; according to the record wave data that the circuit breaker passageway that shifts corresponds, confirm that the circuit breaker passageway that shifts corresponds selects looks closing angle and includes:
determining a displacement time point according to each phase change bit data;
determining a current mutation time point according to the displacement time point and the data of each phase current;
and determining a phase selection closing angle corresponding to the shifted breaker channel according to the current mutation time point and the data of each phase voltage.
In one embodiment of the first aspect, the determining the current abrupt change time point according to the displacement time point and the current data of each phase includes:
in a preset time window, determining a current mutation time point according to the effective value of the fundamental wave of each phase current; or,
the method for determining the current mutation time point according to the displacement time point and the data of each phase current comprises the following steps:
in a preset time window, determining a current mutation time point according to a fundamental wave effective value and an instantaneous value of each phase current;
wherein, the deflection time point is in a preset time window.
In one embodiment of the first aspect, the determining the current mutation time point according to the effective value of the fundamental wave of each phase current includes:
the time point when the fundamental wave effective value reaches a first threshold value for the first time is taken as a current mutation time point;
the step of determining the current mutation time point according to the effective value and the instantaneous value of the fundamental wave of each phase of current comprises the following steps:
and a time point when the fundamental wave effective value reaches the first threshold value and the instantaneous value is smaller than the second threshold value for the first time is taken as a current mutation time point.
In one embodiment of the first aspect, the phase voltage data is discrete voltage data of each phase; according to the current mutation time point and the voltage data of each phase, determining a phase selection closing angle corresponding to the dislocated breaker channel comprises the following steps:
and processing the discrete voltage data by adopting a Fourier filtering algorithm according to the current mutation time point to obtain a phase selection closing angle corresponding to the position-shifted breaker channel.
In one embodiment of the first aspect, the phase selection closing angle monitoring method further includes:
and forming a monitoring report by the phase selection closing angle corresponding to the shifted circuit breaker channel, and storing the information in the monitoring report into a database.
In a second aspect, an embodiment of the present application provides an option closing angle monitoring device, including:
the acquisition module is used for acquiring a wave recording file of the wave recorder;
the searching module is used for determining a position-shifted circuit breaker channel according to the wave recording file;
and the processing module is used for determining the phase selection closing angle corresponding to the shifted breaker channel according to the recording data corresponding to the shifted breaker channel.
In a third aspect, an embodiment of the present application provides a computer device, which includes a memory and a processor, where the memory stores a computer program, and the processor executes the computer program to implement the option closing angle monitoring method according to any one of the embodiments provided in the first aspect.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the option closing angle monitoring method of any one of the embodiments provided in the first aspect.
It can be understood that, the beneficial effects that can be achieved by the above-mentioned optional closing angle monitoring device of the second aspect, the computer device of the third aspect, and the computer-readable storage medium of the fourth aspect may refer to the beneficial effects in the above-mentioned embodiment of the optional closing angle monitoring method of the first aspect, and are not repeated herein.
Drawings
Fig. 1 is a schematic view of an application environment of a phase selection closing angle monitoring method provided by the present application.
Fig. 2 is a schematic flow chart of a phase selection closing angle monitoring method provided in the present application;
FIG. 3 is a schematic channel diagram of an analog channel in an embodiment of the present application;
FIG. 4 is a channel diagram of another analog channel in an embodiment of the present application;
FIG. 5 is a waveform illustrating the effect of a restrike/reflexion on a current signal according to an embodiment of the present application;
fig. 6 is a diagram illustrating a format of a monitoring report according to an embodiment of the present application.
FIG. 7 is a design diagram of a data table of a database according to an embodiment of the present application.
Fig. 8 is a block diagram of a phase selection closing angle monitoring device provided in the present application.
Fig. 9 is a block diagram of a computer device according to an embodiment of the present application.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
The phase selection closing angle monitoring method provided by the application can be applied to the application environment shown in fig. 1. The computer device 120 is connected to the wave recorder 110 (also referred to as a fault wave recorder). The computer device 120 obtains the recording file from the wave recorder 110, determines a channel of the shifted breaker according to the recording file, and determines a phase selection closing angle corresponding to the channel of the shifted breaker according to the recording data corresponding to the channel of the shifted breaker. The computer device 120 performs data processing based on the recording file, and constantly monitors the phase selection and closing angle of the circuit breaker.
The phase selection closing angle monitoring method provided by the application can be applied to the computer device 120, the computer device 120 can be a server or a terminal, wherein the server can be an independent server or a server cluster consisting of a plurality of servers, the embodiment of the application is not particularly limited to this, and the terminal can be but is not limited to various personal computers, notebook computers, smart phones, tablet computers and portable wearable devices.
In one embodiment, the present application provides a phase selection closing angle monitoring method, please refer to fig. 2, which includes steps S210 to S230.
S210, acquiring a wave recording file of a wave recorder;
the fault recorder is generally referred to as a fault recorder, and is used for automatically and accurately recording the change conditions of various electrical quantities before and after a fault when a power system has the fault. The recorder stores the recorded data in a recording file. In one embodiment, the recording file may be a COMTRADE file (power system transient data exchange file), each COMTRADE file is further divided into four subfiles, namely a header file, a configuration file, a data file and an information file, wherein the configuration file records analog quantity channel information of each circuit breaker, the data file records digital quantity channel information of each circuit breaker, and recording data corresponding to each circuit breaker channel, that is, various analog quantity channel information and digital quantity channel information, can be found from the COMTRADE file so as to analyze the information in the next step.
S220, determining a channel of the shifted breaker according to the wave recording file;
generally, a plurality of circuit breakers are generally distributed on one wave recorder, and when one circuit breaker is displaced, the wave recorder records the electrical quantities of all circuit breakers (including the circuit breaker with the displacement and the circuit breaker without the displacement), so that the circuit breaker with the displacement needs to be found from a wave recording file, and the wave recording data corresponding to the circuit breaker with the displacement can be specially processed.
And S230, determining a phase selection closing angle corresponding to the shifted breaker channel according to the wave recording data corresponding to the shifted breaker channel, wherein the wave recording file comprises the wave recording data.
Specifically, various recording data, i.e., electrical quantities, such as current data of each phase, voltage data of each phase, and phase data of each phase, etc., under each breaker channel are recorded in the recording file. The data reflects the change condition of the circuit at each moment before and after the circuit breaks down, and the opening and closing condition of the circuit breaker can be analyzed according to the change condition of the circuit, so that the phase selection closing angle corresponding to each circuit breaker channel can be found according to the recording data. The processing can be performed according to the data of each phase change bit and the data of each phase voltage, or according to the data of each phase current and the data of each phase voltage.
In the above embodiment, under the condition that no additional hardware configuration is needed, the recorded circuit breaker channel with the displacement is found by obtaining the recording file in the wave recorder, and the recording data corresponding to each circuit breaker channel with the displacement is analyzed, so that the phase selection closing angle of each circuit breaker channel with the displacement is monitored in a simple, economic and efficient manner, and the purpose of online monitoring of the phase selection closing angle of the circuit breaker is achieved.
In one embodiment, step S210 specifically includes:
s310, finding each breaker channel from the wave recording file according to preset keywords;
and S320, determining the shifted breaker channels according to the shift data corresponding to each breaker channel.
Specifically, since the names of analog channels in the recording files in different wave recorders have certain artificial randomness, as shown in fig. 3 and 4, fig. 3 and 4 are schematic diagrams of names of circuit breaker channels recorded by different wave recorders, it can be known that different wave recorders name circuit breakers differently, and even if the same file (such as fig. 4) needs to distinguish the names of circuit breaker switching-on and switching-off channels from other protection channels. Therefore, when the names of the circuit breakers and the corresponding relations between the circuit breakers and the corresponding channel data are not configured, the circuit breaker channels can be found more accurately by searching and matching the keywords. Keywords related to the circuit breaker are input in the initialization file in advance, the keywords include but are not limited to circuit breaker keywords, phase category keywords and switching position keywords, the circuit breaker keywords can be fields of the circuit breaker and the switch, the phase category keywords can be fields of the A phase, the B phase and the C phase, and the switching position keywords can be fields of switching positions, switching-off positions and switching-on positions. Furthermore, according to the actual recording situation of the on-site wave recorder, if the wave recorder adopts English recording and has different case, corresponding English keywords can be added in the initialization file or unnecessary keywords can be deleted. When the computer equipment runs, the breaker channel can be searched by adopting a related search matching algorithm according to preset keywords, and the breaker channel can be searched by adopting an accurate matching algorithm and a fuzzy matching algorithm. In one embodiment, all the breaker channels and names can be found more comprehensively by searching all the breaker channels from the recording file by adopting a fuzzy matching technology according to preset keywords. Because all the circuit breakers configured by the wave recorder are recorded in the wave recorder, and all the circuit breaker channels recorded in the wave recording file are searched by adopting keywords instead of the circuit breakers with displacement, whether the circuit breakers with displacement occur is judged for all the searched circuit breakers. The deflection data refers to a recording graph of the corresponding switching value of each breaker channel recorded in the recording file, namely a data file in a COMTRADE file, and whether the breaker deflects or not is judged according to the rising edge or the falling edge of the recording graph, so that the deflected breaker channel is determined.
In the above embodiment, the keyword is used to search out the channel and the name of the breaker, and the breaker with displacement is determined according to the displacement data in the searched out broken channel, so that the channel and the name of the breaker with displacement can be accurately searched out under the condition that the name of the breaker channel is irregular.
In one embodiment, step S220 specifically includes:
s410, determining a displacement time point according to each phase change bit data;
s420, determining a current mutation time point according to the displacement time point and the current data of each phase;
and S430, determining a phase selection closing angle corresponding to the shifted breaker channel according to the current mutation time point and the data of each phase voltage.
Specifically, each phase change bit data is displacement data of a breaker channel where displacement occurs, and a displacement time point is extracted from the displacement data, and the displacement time point is a time point when a channel digital quantity changes from 1 to 0 (open) or from 0 to 1 (close) in a data file in a COMTRADE file. Because the completion of the switching-on and switching-off process of the circuit breaker needs a certain time (the time from the time when the circuit breaker receives the switching-on and switching-off instruction of the phase selection switching-on and switching-off device to the time when the contact is separated to the time when the contact is closed), the time for the circuit breaker to really complete the switching-on and switching-off actions is near the deflection time point, and the moment when the switching-on and switching-off actions of the circuit breaker are completed, the corresponding circuit can generate current mutation, when the switching-on and switching-off of the circuit breaker are completed, the corresponding current signal can be suddenly changed into 0 from a plurality of values, and when the circuit breaker is switched on, the corresponding current signal can be suddenly changed into a numerical value from 0. Therefore, the time point of really completing the switching-off action and the switching-on action in the time near the deflection time point, namely the current sudden change time point, can be accurately judged through the current data of each phase. The phase selection closing angle of the circuit breaker with the displacement refers to the closing angle of each corresponding phase voltage channel, each current mutation time point is also corresponding to voltage data under each voltage channel, the current mutation time point can be directly brought into an analog voltage signal to obtain a corresponding voltage phase angle, or the current mutation time point can be brought into a discrete voltage signal to calculate the phase angle of the voltage through an algorithm.
In one embodiment, the phase current data includes an effective value of a fundamental wave of the phase current, and the step S420 specifically includes: and in a preset time window, determining a current mutation time point according to the effective value of the fundamental wave of each phase of current.
In particular, the change of the corresponding current only occurs within the time interval of the switching-on/off process, even including the time windows around the time interval. The current jump point is therefore sought after a time period before and after the deflection time point. The preset time window is a preset time period for searching for a current catastrophe point, the displacement time point is in the preset time window, in other words, a period of time is respectively prolonged to the front and the back of the displacement time point, for example, the displacement time point is prolonged forwards by a first time period and is prolonged backwards by a second time period, and the total time period of the first time period and the second time period is the preset time window. The first time period and the second time period may be the same or different in length, as long as the current mutation time point is ensured to be located in the preset time window. At a certain time point in a preset time window, the circuit breaker performs switching-on and switching-off actions, currents in corresponding current channels can suddenly generate or suddenly disappear, the time point for detecting the sudden change of the effective value of the fundamental wave of the current is the time point for sudden change of the current, the effective value of the fundamental wave can be determined according to whether the effective value of the fundamental wave is detected at the certain time point and the previous time point, and the determination can also be performed according to whether the effective value of the fundamental wave reaches a threshold value.
In one embodiment, a time point when the fundamental wave effective value reaches the first threshold value for the first time is taken as a current mutation time point. The first threshold value is a current value larger than 0, and when the fundamental wave effective value reaches the first threshold value, the corresponding current channel starts to generate current, namely, a switch contact of the circuit breaker is closed, namely, a time point when the fundamental wave effective value reaches the first threshold value for the first time is used as a current mutation point.
In another embodiment, the phase current data includes an effective value and an instantaneous value of a fundamental wave of the phase current, and the step S420 specifically includes: and in a preset time window, determining a current mutation time point according to the effective value of the fundamental wave of each phase of current.
Specifically, due to the phenomenon of re-ignition and/or re-breakdown that may exist in the current channel, re-ignition and/or re-breakdown after opening may affect the determination of the current trip point, such as the waveform diagram of the effect of the re-ignition and/or re-trip signal on the current shown in fig. 5, it can be seen from the diagram that, at the current trip point, the effective value of the fundamental wave of the current is not zeroed due to the effect of the subsequent re-ignition/re-trip signal, and therefore, in addition to the effective value of the fundamental wave, it is necessary to determine the current trip point by using the instantaneous value of the current.
In one embodiment, a time point after the fundamental wave effective value reaches the first threshold value and when the instantaneous value is first smaller than the second threshold value is taken as a current sudden change time point. When the circuit breaker is closed, if the reignition and/or the re-strike occurs, the instantaneous value of the current reaches a very high value, at this time, the contact of the circuit breaker is not really closed, but a very large current is generated because the contact is very close to generate a large voltage when the contact is about to contact, and the current returns to normal after the contact is really contacted. Therefore, after the effective value of the fundamental wave reaches the first threshold value, the real contact time of the contact is determined according to whether the instantaneous value of the current is smaller than the second threshold value. Therefore, the problem of inaccurate closing time caused by reignition and/or re-breakdown can be avoided.
In one embodiment, the voltage data of each phase is discrete voltage data of each phase, and the step S230 specifically includes: and processing the discrete voltage data by adopting a Fourier filtering algorithm according to the current mutation time point to obtain a phase selection closing angle corresponding to the position-shifted breaker channel.
Specifically, the current abrupt change time point of each phase corresponds to a closing angle of a corresponding voltage channel, that is, a phase selection closing angle of the circuit breaker. The voltage data collected by the wave recorder are discrete voltage data, and the discrete voltage data are processed by adopting a Fourier filtering algorithm, so that higher harmonics can be filtered, and the calculation result is more accurate. In one embodiment, the discrete voltage is processed by a full-cycle fourier filter algorithm, which has the following calculation formula:
wherein I (k) represents the originally collected discrete signal (in this embodiment, the collected discrete voltage signal), k represents the time point, N represents the number of sampling points in one period, IRnAnd IInRespectively representing the real and imaginary parts of the nth harmonic component of the acquired discrete signal. Inputting the current mutation time point into the corresponding discrete voltage signal I (k), and then calculating by adopting a full cycle Fourier filter algorithm to obtain I at the current mutation time pointRnAnd IInThen, the amplitude I of the harmonic component can be further obtainednAnd initial phase angle
Wherein, when n is 1, IRnAnd IInThe calculated amplitude I representing the real and imaginary parts of the fundamental component of the voltage signal, respectivelynAnd initial phase angle
Namely the amplitude and the initial phase angle of the voltage signal fundamental component at the current mutation time point, wherein the initial phase angle is the phase selection closing angle under the voltage channel.
In the above embodiment, the full-cycle fourier filter algorithm is adopted to calculate the phase selection closing angle of each phase voltage at the time point of sudden change of each phase current, so that the fundamental wave can be retained, the constant direct-current component and the integral harmonic component can be filtered, the high-frequency component can be well inhibited, and the calculation accuracy of the phase selection closing angle is improved.
In one embodiment, the method for monitoring the phase selection closing angle further includes: and forming a monitoring report by the phase selection closing angle corresponding to the shifted circuit breaker channel, and storing the monitoring report into a database.
Specifically, the monitoring report is formed to facilitate an engineer to check and judge whether a problem occurs in the phase selection and closing angle of the circuit breaker, so that corresponding measures are taken as soon as possible. The format of the monitoring report is shown in fig. 6, the monitoring report mainly includes a station name, an equipment name, a recording time, a switch, an action (opening or closing), and a phase selection and closing angle, and it can be visually seen from the monitoring report which breaker has acted and the size of the phase selection and closing angle. Meanwhile, data of monitoring information in the monitoring report is input into a database, the monitored historical information can be recorded so as to be convenient for viewing the historical monitoring information, a data table in the database is designed as shown in fig. 7, and entries of the data table mainly comprise fault recording time, fault recording file path, breaker switch, switch action on off and phase selection and closing angle cls _ ang. Monitoring information is stored in a database, so that an engineer can check the accurate closing condition of the phase selection closing angle at any time.
It should be understood that, although the steps in the flowchart of fig. 1 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 1 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.
In an embodiment, a phase selection closing angle monitoring device 500 is provided, please refer to fig. 8, fig. 8 is a block diagram of a phase selection closing angle monitoring device 500, and the phase selection closing angle monitoring device 500 may include: the acquisition module 510 can be connected with the wave recorder, the acquisition module 510 is used for acquiring a wave recording file of the wave recorder, the search module 520 is used for determining a shifted circuit breaker channel according to the wave recording file, and the processing module 530 is used for determining a phase selection closing angle corresponding to the shifted circuit breaker channel according to wave recording data corresponding to the shifted circuit breaker channel.
In an embodiment, the searching module 520 specifically includes: the circuit breaker searching unit is used for finding each circuit breaker channel from the recording file according to preset keywords, and the deflection determining unit is used for determining the deflected circuit breaker channel according to deflection data corresponding to each circuit breaker channel.
In one embodiment, the wave recording data corresponding to the shifted breaker channel includes current data of each phase, voltage data of each phase, and the processing module 530 specifically includes: the circuit breaker comprises a displacement processing unit, a current processing unit and a voltage processing unit, wherein the displacement processing unit is used for determining a displacement time point according to each phase change data, the current processing unit is used for determining a current mutation time point according to the displacement time point and each phase of current data, and the voltage processing unit is used for determining a phase selection closing angle corresponding to a displaced breaker channel according to the current mutation time point and each phase of voltage data.
In an embodiment, the current data of each phase includes a fundamental effective value of each phase current, and the current processing unit is specifically configured to determine a current mutation time point according to the fundamental effective value of each phase current within a preset time window; wherein, the deflection time point is in a preset time window. In one embodiment, the current processing unit is more specifically configured to use a time point when the effective value of the fundamental wave first reaches the first threshold value as the current abrupt change time point.
In another embodiment, the current data of each phase includes an effective value and an instantaneous value of a fundamental wave of each phase of current, and the current processing unit is specifically configured to determine a current mutation time point according to the effective value and the instantaneous value of the fundamental wave of each phase of current within a preset time window; wherein, the deflection time point is in a preset time window. In one embodiment, the current processing unit is more specifically configured to use a time point after the effective value of the fundamental wave reaches the first threshold and the instantaneous value is first smaller than the second threshold as the current discontinuity point.
In an embodiment, the voltage data of each phase is discrete voltage data of each phase, and the voltage processing unit is specifically configured to process the discrete voltage data by using a fourier filter algorithm according to the current mutation time point to obtain a phase selection closing angle corresponding to the shifted breaker channel.
In one embodiment, the phase selection closing angle monitoring apparatus 500 further includes a storage module, and the storage module is configured to form a monitoring report from the phase selection closing angle corresponding to the shifted breaker channel, and store information in the monitoring report into a database.
In one embodiment, a computer device is provided, see fig. 9, comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the following steps when executing the computer program: acquiring a wave recording file of a wave recorder; determining a channel of a shifted breaker according to the wave recording file; and determining a phase selection closing angle corresponding to the shifted circuit breaker channel according to the recording data corresponding to the shifted circuit breaker channel, wherein the recording file comprises the recording data.
In one embodiment, the recording file includes displacement data of each breaker channel, and the processor executes the computer program to further implement the following steps: finding each circuit breaker channel from the wave recording file according to preset keywords; and determining the shifted breaker channel according to the shift data corresponding to each breaker channel.
In one embodiment, the recording data corresponding to the shifted breaker channel includes current data of each phase, voltage data of each phase and phase data of each phase, and the processor executes the computer program to further implement the following steps: determining a displacement time point according to each phase change bit data; determining a current mutation time point according to the displacement time point and the data of each phase current; and determining a phase selection closing angle corresponding to the shifted breaker channel according to the current mutation time point and the data of each phase voltage.
In one embodiment, the phase current data includes an effective value of a fundamental wave of the phase current, and the processor when executing the computer program further performs the steps of: in a preset time window, determining a current mutation time point according to the effective value of the fundamental wave of each phase current; wherein, the deflection time point is in a preset time window.
In one embodiment, the phase current data includes a fundamental effective value and an instantaneous value of the phase current, and the processor when executing the computer program further performs the steps of: in a preset time window, determining a current mutation time point according to a fundamental wave effective value and an instantaneous value of each phase current; wherein, the deflection time point is in a preset time window.
In one embodiment, the phase voltage data is discrete voltage data of each phase, and the processor when executing the computer program further implements the following steps: and processing the discrete voltage data by adopting a Fourier filtering algorithm according to the current mutation time point to obtain a phase selection closing angle corresponding to the position-shifted breaker channel.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and forming a monitoring report by the phase selection closing angle corresponding to the shifted circuit breaker channel, and storing the information in the monitoring report into a database.
The implementation principle and technical effect of the computer device provided by the embodiment of the present application are similar to those of the method embodiment described above, and are not described herein again.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of: acquiring a wave recording file of a wave recorder; determining a channel of a shifted breaker according to the wave recording file; and determining a phase selection closing angle corresponding to the shifted circuit breaker channel according to the recording data corresponding to the shifted circuit breaker channel, wherein the recording file comprises the recording data.
In one embodiment, the recording file includes displacement data for each breaker channel, and the computer program when executed by the processor performs the steps of: finding each circuit breaker channel from the wave recording file according to preset keywords; and determining the shifted breaker channel according to the shift data corresponding to each breaker channel.
In one embodiment, the recording data corresponding to the shifted breaker channel comprises current data of each phase, voltage data of each phase and phase data of each phase, and the computer program when executed by the processor implements the following steps: determining a displacement time point according to each phase change bit data; determining a current mutation time point according to the displacement time point and the data of each phase current; and determining a phase selection closing angle corresponding to the shifted breaker channel according to the current mutation time point and the data of each phase voltage.
In one embodiment, the phase current data comprises an effective value of a fundamental wave of the phase current, the computer program when executed by the processor implementing the steps of: in a preset time window, determining a current mutation time point according to the effective value of the fundamental wave of each phase current; wherein, the deflection time point is in a preset time window.
In an embodiment, the phase current data comprises an effective value and an instantaneous value of a fundamental wave of the phase current, the computer program when executed by the processor implementing the steps of: in a preset time window, determining a current mutation time point according to a fundamental wave effective value and an instantaneous value of each phase current; wherein, the deflection time point is in a preset time window.
In one embodiment, the phase voltage data is discrete phase voltage data, and the computer program when executed by the processor performs the steps of: and processing the discrete voltage data by adopting a Fourier filtering algorithm according to the current mutation time point to obtain a phase selection closing angle corresponding to the position-shifted breaker channel.
In one embodiment, the computer program when executed by the processor implements the steps of: and forming a monitoring report by the phase selection closing angle corresponding to the shifted circuit breaker channel, and storing the information in the monitoring report into a database.
The implementation principle and technical effect of the computer-readable storage medium provided by this embodiment are similar to those of the above-described method embodiment, and are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A phase selection closing angle monitoring method is characterized by comprising the following steps:
acquiring a wave recording file of a wave recorder;
determining a channel of a shifted breaker according to the wave recording file;
and determining a phase selection closing angle corresponding to the shifted circuit breaker channel according to the wave recording data corresponding to the shifted circuit breaker channel, wherein the wave recording file comprises the wave recording data.
2. The phase selection closing angle monitoring method according to claim 1, wherein the wave recording file comprises displacement data of each breaker channel; according to the wave recording file, determining the position-shifted circuit breaker channel comprises the following steps:
finding each circuit breaker channel from the wave recording file according to preset keywords;
and determining the shifted breaker channel according to the shift data corresponding to each breaker channel.
3. The phase selection closing angle monitoring method according to claim 1, wherein the recording data corresponding to the shifted breaker channel comprises current data of each phase, voltage data of each phase and data of each phase; determining a phase selection closing angle corresponding to the shifted breaker channel according to the recording data corresponding to the shifted breaker channel comprises:
determining a displacement time point according to the phase change data;
determining a current mutation time point according to the displacement time point and the current data of each phase;
and determining a phase selection closing angle corresponding to the shifted breaker channel according to the current mutation time point and the voltage data of each phase.
4. The phase selection closing angle monitoring method according to claim 3, wherein the phase-selection closing angle data includes a fundamental effective value of the phase-selection current, and the determining a current sudden-change time point according to the displacement time point and the phase-selection current data includes:
in a preset time window, determining a current mutation time point according to the effective value of the fundamental wave of each phase current; or,
the determining of the current abrupt change time point according to the displacement time point and the current data of each phase includes:
in a preset time window, determining a current mutation time point according to a fundamental wave effective value and an instantaneous value of each phase current;
wherein the deflection time point is within the preset time window.
5. The phase selection closing angle monitoring method according to claim 4, wherein the determining a current mutation time point according to the effective value of the fundamental wave of each phase current comprises:
the time point when the fundamental wave effective value reaches a first threshold value for the first time is taken as a current mutation time point;
the determining of the current mutation time point according to the fundamental wave effective value and the instantaneous value of each phase of current comprises:
and a time point when the fundamental wave effective value reaches a first threshold value and the instantaneous value is smaller than a second threshold value for the first time is taken as a current mutation time point.
6. The phase selection closing angle monitoring method according to claim 3, wherein the voltage data of each phase is discrete voltage data of each phase; the determining the phase selection closing angle corresponding to the shifted breaker channel according to the current mutation time point and the voltage data of each phase comprises:
and processing the discrete voltage data by adopting a Fourier filtering algorithm according to the current mutation time point to obtain a phase selection closing angle corresponding to the shifted breaker channel.
7. The phase selection closing angle monitoring method according to any one of claims 1 to 6, characterized by further comprising:
and forming a monitoring report by the phase selection closing angle corresponding to the shifted circuit breaker channel, and storing the information in the monitoring report into a database.
8. An option closing angle monitoring device, comprising:
the acquisition module is used for acquiring a wave recording file of the wave recorder;
the searching module is used for determining a position-shifted circuit breaker channel according to the wave recording file;
and the processing module is used for determining the phase selection closing angle corresponding to the shifted breaker channel according to the recording data corresponding to the shifted breaker channel.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
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