CN114113881A - Characteristic waveform acquisition device of configuration formula distribution network - Google Patents
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Abstract
The invention discloses a characteristic waveform acquisition device of a configuration type power distribution network, which comprises a plurality of distributed wave recording instruments, a wave recording server, a distribution network dynamic scene management system and a wave recording query system, wherein each distributed wave recording instrument can record the waveform of a node of the configuration type power distribution network where the distributed wave recording instrument is located by a preset frequency, so that the wave recording server stores the waveform, and after the distribution network dynamic scene management system triggers a fault, the wave recording server packs and compresses the waveform of each node when the fault triggers time, so that the wave recording query system can acquire the characteristic waveform of the node corresponding to the fault time. Therefore, the waveform is not required to be acquired manually, and the waveform is not required to be packed or otherwise processed manually, so that the labor is saved, and the efficiency is improved.
Description
Technical Field
The invention relates to the field of power distribution network detection, in particular to a characteristic waveform acquisition device of a configuration type power distribution network.
Background
The configuration distribution network dynamic model scene management system is generally applied to the fields of power distribution network new technology research, power distribution terminal system level function verification and the like, and provides an experimental platform for distribution network automation technology verification and system level test. The distribution network dynamic scene management system builds various power distribution networks through configuration, constructs various experimental scenes, records waveforms of all nodes in the configuration power distribution networks through a distributed wave recorder, simulates fault scenes such as interphase short-circuit faults and single-phase earth faults based on the waveforms of all the nodes, and can conduct fault detection algorithm research and power distribution terminal function detection by deriving characteristic waveforms of all the nodes in the configuration power distribution networks.
However, capturing of fault waveforms of the power distribution network requires a waveform recorder to have a higher sampling frequency and a higher accuracy, which leads to an increase in waveform data volume, and meanwhile, a distributed waveform recorder of a corresponding scale needs to be deployed on the basis of configuration power distribution networks of different scales. Therefore, there is a demand for higher efficiency in processing waveform data when the size of the power distribution network increases.
In the prior art, a manual query method is usually adopted when acquiring waveforms, and waveform data with a certain length recorded near a time is searched according to the approximate time of a fault, the actual time of occurrence of a characteristic waveform is determined through manual analysis, and waveform data of a plurality of nodes are synthesized into a waveform file by using a tool. Therefore, the conventional manual operation method has low efficiency, and if the scale of the configured power distribution network is increased, considerable manual workload is generated, so that the efficiency is further reduced.
Disclosure of Invention
The invention aims to provide a characteristic waveform acquiring device of a configuration type power distribution network, which does not need to acquire waveforms manually or pack or otherwise process the waveforms manually, saves manpower and improves efficiency.
In order to solve the above technical problem, the present invention provides a device for obtaining a characteristic waveform of a configuration type power distribution network, including:
the distributed wave recorders are respectively arranged at each node of the configuration type power distribution network and used for recording the waveform of the node of the configuration type power distribution network where the distributed wave recorders are located at a preset frequency;
the wave recording server is connected with each distributed wave recorder and is used for storing the waveform of each node recorded by each distributed wave recorder according to time and packing and compressing the waveform of each node of the configuration type power distribution network at fault triggering time;
the distribution network dynamic scene management system is connected with the wave recording server and is used for triggering faults to the configuration type distribution network, sending the fault triggering time to the wave recording server and sending fault events to the wave recording query system;
and the wave recording query system is connected with the wave recording server and the distribution network dynamic scene management system and is used for acquiring the characteristic waveform of the node corresponding to the fault event from the waveform packed and compressed by the wave recording server.
Preferably, the method further comprises the following steps:
and the GPS time synchronization system is respectively connected with each distributed wave recorder and is used for acquiring GPS accurate time service and generating time synchronization pulse signals based on the GPS accurate time service so as to adjust the clock of each distributed wave recorder to be the clock consistent with the time synchronization pulse signals.
Preferably, the GPS time synchronization system includes:
the GPS antenna is used for acquiring the GPS accurate time service;
and the time setting server is connected with the GPS antenna and used for generating the time setting pulse signals based on the GPS accurate time service and sending the time setting pulse signals to each distributed wave recorder so as to adjust the clock of each distributed wave recorder to be the clock consistent with the time setting pulse signals.
Preferably, the method further comprises the following steps:
and the network switch is arranged between each distributed wave recorder and the wave recording server and is used for providing a data interaction channel between the distributed wave recorder and the wave recording server.
Preferably, the wave recording server is further configured to control each of the distributed wave recorders to start up based on a setting of a user.
Preferably, the method further comprises the following steps:
and the waveform calibration synthesis module is connected with the wave recording query system and used for verifying whether the frequencies of the characteristic waveforms of all the nodes acquired by the wave recording query system are consistent or not and carrying out time scale calibration processing on the sampling points of the waveforms of all the nodes when the frequencies of the characteristic waveforms of all the nodes are consistent so as to enable the time scale difference between two adjacent sampling points in the waveforms of all the nodes to be within a preset range.
Preferably, the time scale calibration processing is performed on the sampling points of the waveform of each node so that the time scale difference between two adjacent sampling points in the waveform of each node is within a preset range, and the time scale calibration processing includes:
and in the sampling points of the waveform of each node, the sampling points with the later time scale are removed from the two adjacent sampling points with the time scale difference smaller than the minimum preset time scale difference, and one sampling point is supplemented by an interpolation algorithm between the two adjacent sampling points with the time scale difference larger than the maximum preset time scale difference.
Preferably, the wave recording server is specifically configured to cyclically store the waveform of each node recorded by each distributed wave recorder according to a first-in first-out principle according to time, and perform packing compression on the waveform of each node of the configuration type power distribution network at the fault trigger time.
Preferably, the wave recording server comprises a waveform data storage module and a characteristic waveform query module;
the waveform data storage module is used for storing the waveform of each node recorded by each distributed wave recorder according to time;
the characteristic waveform query module is used for packing and compressing the waveform of each node of the configuration type power distribution network at the fault trigger time.
The application provides a characteristic waveform acquisition device of configuration formula distribution network, including a plurality of distributed oscillographs, the record wave server, join in marriage net movable mould scene management system and record wave inquiry system, wherein, each distributed oscillograph can be with the wave form of the node of preset frequency record self place configuration formula distribution network, thereby make the record wave server save the wave form, join in marriage net movable mould scene management system and trigger the trouble back, the wave form packing compression of each node when the record wave server triggers the time with the trouble, so that record wave inquiry system obtains the characteristic waveform with the node that the fault time corresponds from the centre. Therefore, the waveform is not required to be acquired manually, and the waveform is not required to be packed or otherwise processed manually, so that the labor is saved, and the efficiency is improved.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a characteristic waveform obtaining apparatus for a configured power distribution network according to the present invention;
fig. 2 is a schematic structural diagram of a specific characteristic waveform obtaining device of a configured power distribution network according to the present invention.
Detailed Description
The core of the invention is to provide a characteristic waveform acquisition device for a configuration type power distribution network, which does not need to acquire waveforms manually or pack or otherwise process the waveforms manually, thereby saving manpower and improving efficiency.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a device for acquiring a characteristic waveform of a configured power distribution network according to the present invention, the device including:
the distributed wave recorders 11 are respectively arranged at each node of the configuration type power distribution network and are used for recording the waveform of the node of the configuration type power distribution network where the distributed wave recorders are arranged at preset frequency;
the wave recording server 12 is connected with each distributed wave recorder 11 and used for storing the waveform of each node recorded by each distributed wave recorder 11 according to time and packing and compressing the waveform of each node of the configuration type power distribution network at fault triggering time;
the distribution network dynamic scene management system 13 is connected with the wave recording server 12 and is used for triggering faults to the configuration type distribution network, sending fault triggering time to the wave recording server 12 and sending fault events to the wave recording query system 14;
and the wave recording query system 14 is connected with the wave recording server 12 and the distribution network moving-mode scene management system 13 and is used for acquiring the characteristic waveforms of the nodes corresponding to the fault events from the waveforms packed and compressed by the wave recording server 12.
In this embodiment, each node of the configuration power distribution network is provided with one distributed wave recorder 11, each distributed wave recorder 11 is configured to record a waveform of a node of the configuration power distribution network where the distributed wave recorder 11 is located, and transmit the waveform to the wave recorder server 12, so that the wave recorder server 12 stores the waveform of each node according to time, the distribution network dynamic scenario management system 13 triggers a fault to the configuration power distribution network, and sends the fault trigger time to the wave recorder server 12, and since the wave recorder server 12 stores the waveform of each node according to time, the waveform of each node at the fault trigger time can be directly packed and compressed, and sent to the wave recorder query system 14, so that the wave recorder query system 14 obtains a characteristic waveform of a corresponding node therein.
It should be noted that, after the distribution network dynamic scenario management system 13 triggers a fault to the configured distribution network, the recording query system 14 does not always need to obtain the characteristic waveforms of all nodes according to the fault event, and only needs to obtain the characteristic waveforms of several nodes, for example, the fault event sent by the distribution network dynamic scenario management system 13 may include an Identity Document (ID) of the node triggering the fault, and the recording query system 14 directly obtains the corresponding characteristic waveforms according to the node ID.
In addition, in the present application, the distribution network dynamic scenario management system 13 triggers a fault to the configured distribution network according to the setting of the user.
It should be further noted that the wave recording server 12 in the present application may be connected to a plurality of distributed wave recording instruments 11 at the same time, if the number of the distributed wave recording instruments 11 is too large, a plurality of wave recording servers 12 may be provided, and each wave recording server 12 is connected to a plurality of distributed wave recording instruments 11, so as to reduce resource occupation of each wave recording server 12.
In addition, as a preferred embodiment, the wave recording server 12 is specifically configured to circularly store the waveforms of the nodes recorded by the distributed wave recorders 11 according to time and a first-in first-out principle, and perform packing compression on the waveforms of the nodes of the configured power distribution network at the fault trigger time.
The applicant considers that if there are many nodes and there are many waveform data recorded by the distributed wave recorder 11, the storage space of the wave recording server 12 will be occupied greatly, and in order to save the storage space, the present application may also make a cyclic use of the storage space, that is, delete the waveform stored first and store the waveform received currently by using the first-in first-out principle.
The distributed wave recorder 11 in this embodiment is a high-frequency wave recorder, and can record the waveform of the node where the distributed wave recorder is located at a preset frequency.
Based on this, in the application, the waveform of each node of the fault triggering time is directly packed and compressed by the wave recording server 12, and the waveform of each node of the fault triggering time is not manually searched from a plurality of stored waveforms of a plurality of nodes, so that the labor is saved, and the efficiency is high.
On the basis of the above-described embodiment:
referring to fig. 2, fig. 2 is a schematic structural diagram of a specific characteristic waveform obtaining device of a configured power distribution network according to the present invention.
As a preferred embodiment, the method further comprises the following steps:
and a GPS (Global Positioning System) timing System respectively connected to each of the distributed wave recorders 11, and configured to acquire a GPS accurate time service and generate a timing pulse signal based on the GPS accurate time service, so as to adjust a clock of each of the distributed wave recorders 11 to a clock consistent with the timing pulse signal.
In consideration of the fact that the clocks of the distributed wave recorders 11 are provided by the crystal oscillators respectively, but the clocks provided by different crystal oscillators may have different frequencies, the present application further provides a GPS time synchronization system, which can adjust the clocks of the distributed wave recorders 11 to pulses consistent with time synchronization pulse signals according to GPS accurate time service, and although the clocks of the distributed wave recorders 11 may still have different frequencies, the present application continuously adjusts the clocks of the distributed wave recorders 11, that is, when the clock difference of the distributed wave recorders 11 exceeds a preset value, the clocks of the distributed wave recorders 11 are subjected to time synchronization again.
Specifically, when the clock of each distributed wave recorder 11 is adjusted in time synchronization, the rising edge of the clock of each distributed wave recorder 11 may be adjusted to be a synchronous rising edge or the falling edge may be adjusted to be a synchronous falling edge according to actual needs, which is not limited in this application.
As a preferred embodiment, the GPS time synchronization system includes:
the GPS antenna 21 is used for acquiring GPS accurate time service;
and the time setting server 22 is connected with the GPS antenna 21 and configured to generate a time setting pulse signal based on GPS accurate time setting and send the time setting pulse signal to each of the distributed wave recorders 11, so as to adjust the clock of each of the distributed wave recorders 11 to a clock consistent with the time setting pulse signal.
The GPS antenna 21 in this embodiment is used to obtain GPS accurate time service, so that the time synchronization server 22 performs time synchronization calibration on the clocks of the distributed wave recorders 11 based on the GPS accurate time service.
Of course, the present application is not limited to calibrating the clocks of the distributed oscillographs 11 by the GPS time synchronization system.
As a preferred embodiment, the method further comprises the following steps:
and the network switch 23 is arranged between each distributed wave recorder 11 and the wave recording server 12 and is used for providing a data interaction channel between the distributed wave recorder 11 and the wave recording server 12.
In this embodiment, data interaction is performed between each distributed wave recorder 11 and the wave recording server 12 through the network switch 23, that is, each distributed wave recorder 11 sends the recorded waveform of the node where it is located to the wave recording server 12 through the network switch 23, and the wave recording server 12 can manage each distributed wave recorder 11 through the network switch 23.
As a preferred embodiment, the recording server 12 is further configured to control each distributed wave recorder 11 to be powered on based on a user setting.
The wave recording server 12 in this embodiment also controls each distributed wave recorder 11 to start up based on the setting of the user, so as to control the distributed wave recorder 11.
It should be noted that the wave recording server 12 in this application controls the start-up and shut-down of each distributed wave recorder 11 through the network switch 23, and of course, the wave recording server 12 may also perform other controls on each distributed wave recorder 11 through the network switch 23, which is not limited in this application.
As a preferred embodiment, the method further comprises the following steps:
and the waveform calibration and synthesis module 24 is connected to the wave recording query system 14 and configured to check whether the frequencies of the characteristic waveforms of each node acquired by the wave recording query system 14 are consistent, and perform time scale calibration processing on sampling points of the waveform of each node when the frequencies of the characteristic waveforms of each node are consistent, so that a time scale difference between two adjacent sampling points in the waveform of each node is within a preset range.
In order to solve the above technical problem, the applicant further provides a waveform calibration and synthesis module 24, which is capable of determining whether the frequencies of the characteristic waveforms of each node acquired by the recording query system 14 are consistent, and if so, it indicates that there is no misalignment in the phases of the waveforms recorded by each distributed wave recorder 11, but if not, it indicates that there is a misalignment, and at this time, a user may be prompted to perform processing or perform phase adjustment.
In addition, the applicant also considers that when the distributed wave recorder 11 records the waveform of the node where the distributed wave recorder is located, the time scale difference between two sampling points may be too small or too large, and in order to ensure the validity of the characteristic waveform of each node acquired by the wave recording query module, in the present application, the time scale calibration processing is also performed on the sampling points of the waveform of each node, and the time scale difference between two adjacent sampling points is within a preset range.
As a preferred embodiment, performing a time scale calibration process on the sampling points of the waveform of each node so that a time scale difference between two adjacent sampling points in the waveform of each node is within a preset range includes:
and in the sampling points of the waveform of each node, the sampling points with the later time scale are removed from the two adjacent sampling points with the time scale difference smaller than the minimum preset time scale difference, and one sampling point is supplemented by an interpolation algorithm between the two adjacent sampling points with the time scale difference larger than the maximum preset time scale difference.
Specifically, when the sampling points of the waveform of each node are subjected to time scale calibration processing, and the time scale difference between two adjacent sampling points is within a preset range, one sampling point is supplemented between the two adjacent sampling points with the time scale difference larger than the maximum preset time scale difference, and the method for supplementing the sampling points is to utilize an interpolation algorithm to process the waveform of the two adjacent sampling points so as to ensure the effectiveness of the waveform, but when the sampling points are supplemented, the time scale difference between the supplemented sampling points and the two adjacent sampling points before supplementation is not smaller than the minimum preset time scale difference.
And if two adjacent sampling points with the time scale difference smaller than the minimum preset time scale difference exist, the latter sampling point is removed to ensure the effectiveness of the waveform.
For example, the minimum preset time difference may be, but is not limited to, half of the theoretical sampling time difference, and the maximum preset time difference may be, but is not limited to, 1.5 times the theoretical sampling time difference.
As a preferred embodiment, the wave recording server 12 includes a waveform data storage module and a characteristic waveform query module;
the waveform data storage module is used for storing the waveform of each node recorded by each distributed wave recorder 11 according to time;
the characteristic waveform query module is used for packing and compressing the waveform of each node of the configuration type power distribution network at the fault trigger time.
In this embodiment, the functions of the wave recording server 12 are respectively completed by the waveform data storage module and the characteristic waveform query module, so that the waveforms of the nodes recorded by the distributed wave recorders 11 are stored according to time, and the waveforms of the nodes of the configuration power distribution network at the fault trigger time are packed and compressed, and meanwhile, the resource occupation of each module is reduced, and the efficiency is improved.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A device for obtaining characteristic waveforms of a configured power distribution network is characterized by comprising:
the distributed wave recorders are respectively arranged at each node of the configuration type power distribution network and used for recording the waveform of the node of the configuration type power distribution network where the distributed wave recorders are located at a preset frequency;
the wave recording server is connected with each distributed wave recorder and is used for storing the waveform of each node recorded by each distributed wave recorder according to time and packing and compressing the waveform of each node of the configuration type power distribution network at fault triggering time;
the distribution network dynamic scene management system is connected with the wave recording server and is used for triggering faults to the configuration type distribution network, sending the fault triggering time to the wave recording server and sending fault events to the wave recording query system;
and the wave recording query system is connected with the wave recording server and the distribution network dynamic scene management system and is used for acquiring the characteristic waveform of the node corresponding to the fault event from the waveform packed and compressed by the wave recording server.
2. The apparatus of claim 1, further comprising:
and the GPS time synchronization system is respectively connected with each distributed wave recorder and is used for acquiring GPS accurate time service and generating time synchronization pulse signals based on the GPS accurate time service so as to adjust the clock of each distributed wave recorder to be the clock consistent with the time synchronization pulse signals.
3. The apparatus of claim 2, wherein the GPS time synchronization system comprises:
the GPS antenna is used for acquiring the GPS accurate time service;
and the time setting server is connected with the GPS antenna and used for generating the time setting pulse signals based on the GPS accurate time service and sending the time setting pulse signals to each distributed wave recorder so as to adjust the clock of each distributed wave recorder to be the clock consistent with the time setting pulse signals.
4. The apparatus of claim 1, further comprising:
and the network switch is arranged between each distributed wave recorder and the wave recording server and is used for providing a data interaction channel between the distributed wave recorder and the wave recording server.
5. The apparatus of claim 1, wherein the waveform recording server is further configured to control each of the distributed waveform recorders to start up based on a user setting.
6. The apparatus of claim 1, further comprising:
and the waveform calibration synthesis module is connected with the wave recording query system and used for verifying whether the frequencies of the characteristic waveforms of all the nodes acquired by the wave recording query system are consistent or not and carrying out time scale calibration processing on the sampling points of the waveforms of all the nodes when the frequencies of the characteristic waveforms of all the nodes are consistent so as to enable the time scale difference between two adjacent sampling points in the waveforms of all the nodes to be within a preset range.
7. The apparatus according to claim 6, wherein the time scale calibration processing is performed on the sampling points of the waveform of each node so that the time scale difference between two adjacent sampling points in the waveform of each node is within a preset range, and the apparatus comprises:
and in the sampling points of the waveform of each node, the sampling points with the later time scale are removed from the two adjacent sampling points with the time scale difference smaller than the minimum preset time scale difference, and one sampling point is supplemented by an interpolation algorithm between the two adjacent sampling points with the time scale difference larger than the maximum preset time scale difference.
8. The apparatus according to claim 1, wherein the waveform recording server is specifically configured to cyclically store the waveform of each node recorded by each distributed waveform recorder according to time and a first-in first-out principle, and perform packet compression on the waveform of each node of the configured power distribution network at the fault trigger time.
9. The apparatus of any of claims 1-8, wherein the waveform recording server comprises a waveform data storage module and a characteristic waveform query module;
the waveform data storage module is used for storing the waveform of each node recorded by each distributed wave recorder according to time;
the characteristic waveform query module is used for packing and compressing the waveform of each node of the configuration type power distribution network at the fault trigger time.
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| 罗毅: "分布式故障录波系统", 电力系统自动化, no. 20, 30 October 2001 (2001-10-30) * |
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