CN116317131A - System for realizing on-line monitoring and processing of large power grid harmonic wave - Google Patents
System for realizing on-line monitoring and processing of large power grid harmonic wave Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00034—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving an electric power substation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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Abstract
The invention relates to a system for realizing on-line monitoring and processing of large power grid harmonic waves, which comprises a wave recorder, a relay protection device, a relay protection information substation, a relay protection information main station and a GPS time synchronization module, wherein the wave recorder carries out high-frequency sampling on the voltage and the current of a transformer substation and triggers a wave recording function in a remote starting mode; the relay protection information substation performs protocol conversion, acquires and remotely transmits the recording file and relay protection information of the recorder, and supports responding to a command of remote starting of the recorder of an external system; the relay protection information master station remotely starts the fault wave recording function of the wave recorder. By adopting the system for realizing the on-line monitoring and processing of the harmonic waves of the large power grid, the dynamic monitoring, analysis and traceability of the harmonic voltages, currents and the like of the new energy plant station and the hub substation can be realized rapidly by modifying and upgrading the relay protection information sub-station installed at the new energy plant station end and the hub substation, and data support is provided for the treatment of the harmonic waves.
Description
Technical Field
The invention relates to the field of new energy, in particular to the field of power grid structures of electric power devices, and particularly relates to a system for realizing online monitoring and processing of large power grid harmonic waves.
Background
The new energy represented by wind power and photovoltaic is rapidly developed, the power grid structure of the power device is deeply changed, harmonic components in the normal operation of the power device and short-circuit current are rich and the proportion is increased, the normal operation of harmonic sensitive equipment of the power grid is affected, incorrect actions of the relay protection device can be caused when the harmonic sensitive equipment is severe, the sensitivity and the reliability of relay protection are reduced, therefore, the monitoring of harmonic waves is enhanced to realize early warning of the running state of the power grid, and the safety, the stability and the reliability of the power grid are improved.
In recent years, a plurality of cases of background harmonic waves in the network affect the stable operation of the power grid, because special harmonic wave on-line monitoring equipment is not generally arranged in a hub transformer substation of 330kV or above, the traditional wave recording starting mechanism based on power frequency components is difficult to meet the regional harmonic wave monitoring requirement, and a large amount of manual triggering work efficiency is low, so that the device is required to quickly realize the concurrent acquisition, remote transmission, on-line monitoring and analysis of the power grid harmonic waves based on the existing device.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a system for realizing the online monitoring and processing of the harmonic waves of the large power grid, which has high acquisition efficiency, good stability and wider application range.
In order to achieve the above purpose, the system for realizing the online monitoring and processing of the harmonic waves of the large power grid is as follows:
the system for realizing the on-line monitoring and processing of the harmonic waves of the large power grid is mainly characterized by comprising a recorder, a relay protection device, a relay protection information substation, a relay protection information master station and a GPS time synchronization module,
the input end of the wave recorder is connected with the transformer substation, and is used for carrying out high-frequency sampling on the voltage and the current of the transformer substation, and triggering the wave recording function in a remote starting mode to generate a wave recording file;
the relay protection device is connected with a transformer substation line;
the relay protection information substation is communicated with the line wave recorder, the transformer wave recorder and the relay protection device in a connecting way, is used for performing protocol conversion, collecting and remotely transmitting the wave recording file and relay protection information of the wave recorder, and supporting responding to a command of remotely starting the wave recorder of an external system;
the relay protection information master station is connected and communicated with the relay protection information sub-stations and is used for remotely starting the fault wave recording function of the wave recorder, carrying out periodic analysis and statistics on recorded and broadcast files and monitoring power grid harmonic waves on line;
the GPS time synchronization module acquires standard time signals from GPS satellites and transmits the standard time signals to the oscillograph, the relay protection device, the relay protection information substation and the relay protection information master station, and the GPS time synchronization module is used for realizing the synchronization of data time marks of all the devices;
the relay protection information main station remotely triggers the fault wave recording function of the wave recorder, so that the relay protection information sub-station generates and uploads the power grid voltage and current section data synchronized with the whole grid, secondary processing is carried out on the acquired data, and harmonic monitoring of the power grid is realized by carrying out data analysis on the processed data.
Preferably, the relay protection information master station comprises a harmonic data report analysis module, a harmonic dynamic visual display module, a wave recording file harmonic monitoring analysis and alarm module and a wave recorder remote starting and automatic calling module, wherein the harmonic data report analysis module, the harmonic dynamic visual display module, the wave recording file harmonic monitoring analysis and alarm module and the wave recorder remote starting and automatic calling module are all connected with the relay protection information substation;
the remote starting and automatic calling module of the recorder is used for automatically sending a remote starting command to the recorder through the relay protection information substation according to a set rule and automatically downloading a record file which is newly generated by the recorder;
the wave recording file harmonic monitoring analysis and alarm module is connected with the wave recorder remote starting and automatic calling module and is used for carrying out harmonic analysis on the latest wave recording file, generating a full-network wave recording file harmonic monitoring report section file and sending alarm information when abnormality is found;
the harmonic dynamic visual display module is connected with the wave recording file harmonic monitoring analysis and alarm module and is used for displaying the latest harmonic analysis result;
the harmonic data report module is connected with the harmonic dynamic visual display module and is used for displaying the harmonic monitoring report section file of the whole network wave recording file and the change trend curve of the alarm event according to time periods.
Preferably, the recorder comprises a line recorder and a transformer recorder, wherein the line recorder is connected with a transformer substation and is used for carrying out high-frequency sampling on line working voltage and current of the transformer substation, recording a steady-state process and a transient-state process of an electric power system and triggering to generate a wave recording file in a remote starting mode;
the transformer oscillograph is connected with the transformer substation and is used for performing high-frequency sampling on transformer working voltage and current of the transformer substation, recording steady-state process and transient-state process of the power system and triggering generation of oscillograph files in a remote starting mode.
Preferably, the remote starting and automatic calling module of the recorder issues a remote starting command at the whole point time, and the harmonic file is acquired in a mode of steady-state period acquisition at the whole point time.
Preferably, the remote starting and automatic calling module of the recorder comprises a remote starting test unit, the remote starting test unit is connected with the recorder through a relay protection information substation, and the output end of the remote starting test unit is connected with a harmonic wave monitoring analysis and alarm module of the recording file and is used for performing a remote starting test before issuing a remote starting command, and the method specifically comprises the following steps:
recording the time of command sending time; reading a time stamp of a first data point in the wave recording file to obtain the generation moment of the wave recording file of the wave recorder; calculating the delay time T delay The method comprises the steps of carrying out a first treatment on the surface of the Advance T before hour whole point delay And sending a recording remote start command by +delta T seconds, wherein delta T is the data from the recording data to the whole point moment.
Preferably, the harmonic wave monitoring analysis and alarm module of the wave recording file comprises a harmonic wave analysis unit, wherein the input end of the harmonic wave analysis unit is connected with the remote starting and automatic calling module of the wave recorder, and the output end of the harmonic wave analysis unit is connected with the harmonic wave dynamic visual display module and is used for finding the zero moment point of the whole point through the wave recording file, generating a harmonic wave monitoring report section file of the whole network wave recording file and identifying the analysis result of each transformer substation.
Preferably, the harmonic data report analysis module is connected with an external database.
Preferably, the line recorder comprises a line working voltage and current sampling unit, wherein the line working voltage and current sampling unit is connected with a line of a transformer substation and is further connected with a remote starting and automatic calling module of the recorder through a relay protection information substation.
Preferably, the transformer oscillograph comprises a transformer working voltage and current sampling unit, wherein the transformer working voltage and current sampling unit is connected with a transformer of a transformer substation and is further connected with a remote starting and automatic calling module of the oscillograph through a relay protection information substation.
By adopting the system for realizing the online monitoring and processing of the harmonic waves of the large power grid, the dynamic monitoring, analysis and traceability of the harmonic voltages, currents and the like of the new power grid station and the hub substation can be realized rapidly by modifying and upgrading the relay protection information main station software installed at the new power grid station end and the hub substation relay protection information sub station and the relay protection information main station at the control end, and data support is provided for the treatment of the harmonic waves.
Drawings
Fig. 1 is a schematic structural diagram of a system for implementing on-line monitoring processing of large power grid harmonics in the present invention.
Fig. 2 is a schematic diagram of a remote start-up time of the system for implementing the on-line monitoring process of the large power grid harmonic of the present invention.
Fig. 3 is a schematic diagram of a harmonic dynamic visualization display module display embodiment of the system for implementing on-line monitoring processing of large power grid harmonics.
Detailed Description
In order to more clearly describe the technical contents of the present invention, a further description will be made below in connection with specific embodiments.
The system for realizing the on-line monitoring and processing of the harmonic waves of the large power grid comprises a recorder, a relay protection device, a relay protection information substation, a relay protection information master station and a GPS time synchronization module,
the input end of the wave recorder is connected with the transformer substation, and is used for carrying out high-frequency sampling on the voltage and the current of the transformer substation, and triggering the wave recording function in a remote starting mode to generate a wave recording file;
the relay protection device is connected with a transformer substation line;
the relay protection information substation is communicated with the line wave recorder, the transformer wave recorder and the relay protection device in a connecting way, is used for performing protocol conversion, collecting and remotely transmitting the wave recording file and relay protection information of the wave recorder, and supporting responding to a command of remotely starting the wave recorder of an external system;
the relay protection information master station is connected and communicated with the relay protection information sub-stations and is used for remotely starting the fault wave recording function of the wave recorder, carrying out periodic analysis and statistics on recorded and broadcast files and monitoring power grid harmonic waves on line;
the GPS time synchronization module acquires standard time signals from GPS satellites and transmits the standard time signals to the oscillograph, the relay protection device, the relay protection information substation and the relay protection information master station, and the GPS time synchronization module is used for realizing the synchronization of data time marks of all the devices;
the relay protection information main station remotely triggers the fault wave recording function of the wave recorder, so that the relay protection information sub-station generates and uploads the power grid voltage and current section data synchronized with the whole grid, secondary processing is carried out on the acquired data, and harmonic monitoring of the power grid is realized by carrying out data analysis on the processed data.
As a preferred implementation mode of the invention, the relay protection information master station comprises a harmonic data report analysis module, a harmonic dynamic visual display module, a wave recording file harmonic monitoring analysis and alarm module and a wave recorder remote starting and automatic calling module, wherein the harmonic data report analysis module, the harmonic dynamic visual display module, the wave recording file harmonic monitoring analysis and alarm module and the wave recorder remote starting and automatic calling module are all connected with a relay protection information substation;
the remote starting and automatic calling module of the recorder is used for automatically sending a remote starting command to the recorder through the relay protection information substation according to a set rule and automatically downloading a record file which is newly generated by the recorder;
the wave recording file harmonic monitoring analysis and alarm module is connected with the wave recorder remote starting and automatic calling module and is used for carrying out harmonic analysis on the latest wave recording file, generating a full-network wave recording file harmonic monitoring report section file and sending alarm information when abnormality is found;
the harmonic dynamic visual display module is connected with the wave recording file harmonic monitoring analysis and alarm module and is used for displaying the latest harmonic analysis result;
the harmonic data report module is connected with the harmonic dynamic visual display module and is used for displaying the harmonic monitoring report section file of the whole network wave recording file and the change trend curve of the alarm event according to time periods.
As a preferred embodiment of the invention, the wave recorder comprises a line wave recorder and a transformer wave recorder, wherein the line wave recorder is connected with a transformer substation and is used for carrying out high-frequency sampling on line working voltage and current of the transformer substation, recording a steady-state process and a transient-state process of an electric power system and triggering to generate a wave recording file in a remote starting mode;
the transformer oscillograph is connected with the transformer substation and is used for performing high-frequency sampling on transformer working voltage and current of the transformer substation, recording steady-state process and transient-state process of the power system and triggering generation of oscillograph files in a remote starting mode.
As a preferred implementation mode of the invention, the remote starting and automatic calling module of the recorder issues a remote starting command at the whole point time, and the harmonic file is acquired in a mode of steady state period acquisition at the whole point time.
As a preferred embodiment of the invention, the remote starting and automatic calling module of the wave recorder comprises a remote starting test unit, the remote starting test unit is connected with the wave recorder through a relay protection information substation, and the output end of the remote starting test unit is connected with a wave recording file harmonic monitoring analysis and alarm module and is used for carrying out a remote starting test before issuing a remote starting command, and the method specifically comprises the following steps:
recording the time of command sending time; reading a time stamp of a first data point in the wave recording file to obtain the generation moment of the wave recording file of the wave recorder; calculating the delay time T delay The method comprises the steps of carrying out a first treatment on the surface of the Advance T before hour whole point delay And sending a recording remote start command by +delta T seconds, wherein delta T is the data from the recording data to the whole point moment.
As a preferred implementation mode of the invention, the harmonic wave monitoring analysis and alarm module of the wave recording file comprises a harmonic wave analysis unit, wherein the input end of the harmonic wave analysis unit is connected with the remote starting and automatic calling module of the wave recorder, and the output end of the harmonic wave analysis unit is connected with the harmonic wave dynamic visual display module and is used for finding the zero moment point of the whole point through the wave recording file, generating a harmonic wave monitoring report section file of the whole network wave recording file and identifying the analysis result of each transformer substation.
As a preferred embodiment of the invention, the harmonic data report analysis module is connected with an external database.
As a preferred implementation mode of the invention, the line recorder comprises a line working voltage and current sampling unit, wherein the line working voltage and current sampling unit is connected with a line of a transformer substation and is also connected with a remote starting and automatic calling module of the recorder through a relay protection information substation.
As a preferred implementation mode of the invention, the transformer oscillograph comprises a transformer working voltage and current sampling unit, wherein the transformer working voltage and current sampling unit is connected with a transformer of a transformer substation and is also connected with a remote starting and automatic calling module of the oscillograph through a relay protection information substation.
In the specific implementation mode of the invention, the relay protection information device of the large power grid consists of a relay protection information sub-station arranged at a transformer substation end, a relay protection information main station arranged at a dispatching mechanism, a network and interface equipment for providing relay protection information transmission, wherein the relay protection information sub-station is responsible for communication with the relay protection device and a fault recorder at the transformer substation end, and is used for finishing protocol conversion, information collection, processing, control, storage and sending to the main station device according to requirements. The relay protection information master station is in real time charge of communicating with the relay protection information sub-stations to complete the functions of information processing, analysis, release and the like. The fault recorder has the functions of high-frequency sampling total station voltage and current and remote triggering wave recording, so that the data source, acquisition and transmission of harmonic wave on-line monitoring are all provided, and the concurrent acquisition, remote transmission and on-line monitoring and analysis of the harmonic wave of the power grid can be realized only by slightly modifying part of functional software on the main station side.
According to the invention, the fault wave recording function of the wave recorder is remotely triggered by the relay protection information substation and the relay protection information main station, and the harmonic wave on-line monitoring of the large power grid is realized through the period analysis and statistics of the wave recording file.
The data analysis of the invention is triggered by the cycle remote, a plurality of relay protection information substations are required to generate and upload the whole-network synchronous power grid voltage and current section data, the acquired data are processed for the second time to generate new data, and the generated new data are analyzed for the data, so that the purpose of monitoring the harmonic wave of the power grid is realized.
The invention has the wave recording file triggering command remotely issued by the master station, has a remote interaction process, has strict requirements on data synchronization, and is oriented to a plurality of substations.
As shown in fig. 1, the system specifically includes the following structures:
line recorder: a special recording device for high-frequency sampling of working voltage and current of a transformer substation line records a steady-state process and a transient process of a power system, data are stored in a wave recording file mode, and an external remote starting mode is supported to trigger generation of the wave recording file.
Transformer recorder: a special recording device for high-frequency sampling of working voltage and current of a transformer substation records a steady-state process and a transient process of a power system, data are stored in a wave recording file mode, and an external remote starting mode is supported to trigger generation of the wave recording file.
Relay protection information substation: and equipment for communicating with the line recorder, the transformer recorder and the relay protection device in the transformer substation, completing protocol conversion, collecting and remotely transmitting the recording file and relay protection information of the recorder, and supporting responding to commands such as remote starting of the recorder of an external system.
Relay protection information master station: and the hardware and software system is arranged at the dispatching end and is responsible for communicating with the relay protection information substation, completing the functions of information processing, analysis, release and the like.
GPS time setting module: standard time signals are acquired from the GPS satellites and transmitted to equipment such as a relay protection device, a recorder and the like through various interface types, so that time synchronization of all the equipment in a wide area range is achieved.
Remote starting and automatic calling module of recorder based on GPS: the remote start command is automatically sent to the recorder through the information protection substation according to the set rules, and the record file which is newly generated by the recorder is automatically downloaded for the harmonic monitoring analysis and the alarm module of the record file to perform data analysis.
Harmonic wave monitoring analysis and alarm module of wave recording file: the method comprises the steps of disposing at a relay protection information master station, carrying out harmonic analysis on a downloaded latest recorded wave file, generating a full-network recorded wave file harmonic monitoring report section file, and sending out alarm information when abnormality is found.
Harmonic dynamic visualization display module: the method comprises the steps of disposing at a relay protection information master station, displaying the latest harmonic analysis result according to a transformer substation on a power grid geographical wiring diagram, and facilitating users to intuitively browse the current harmonic analysis result of the power grid.
Harmonic data report module: the method comprises the steps of disposing at a relay protection information master station, displaying a change trend curve of a harmonic monitoring report profile file and an alarm event of a whole network wave recording file according to time periods.
(1) The system can realize the function of remote synchronous acquisition of the wave recording files of the wave recorder based on the GPS:
the harmonic wave of the power grid is influenced by the power supply characteristic and the power grid structure, and the frequency and distribution of the harmonic wave are generally small, so that the collection of the harmonic wave file can be realized in a mode of collecting steady-state periods at all times, and a remote starting command can be issued at the moment of 0 second of each hour generally once per hour.
The recorder, the relay protection information substation and the relay protection information master station all receive the time synchronization signals of the GPS, so that the synchronization of the data time marks of all devices is ensured, and the recorder is remotely started to generate the record.
The method is influenced by the command processing speed of the data transmission channel and the relay protection information substation, the command issuing of the relay protection information main station needs to have a certain advance allowance, and the whole point time is included when the recorder receives the starting command to generate the recording file, so that synchronous sampling of the whole network harmonic wave is realized, and therefore, the remote starting test is performed once before the remote starting of the starting period.
1. First record the time T of command transmission time 0 。
2. The recorder will output the time stamp of each data point when generating the record file, and the time stamp of the first data point in the record file is read to obtain the record file generation time T of the recorder 2 。
3. Calculating delay time: t (T) delay ＝T 2 －T 0 。
As shown in FIG. 2, the relay protection information master station records T of each set of recorder delay Time, advance T before hour whole point delay And sending a wave recording remote starting command in +0.2 seconds, so that the wave recording files generated by all wave recorders can be ensured to contain the data at the whole point of 0 seconds, and synchronous sampling of the whole-network harmonic data is realized by the mode. The 0.2 second time is matched, and mainly increases the processing of resisting transmission disturbance so as to ensure that the recorded data generated by the recorder can contain the data up to the whole point time.
(2) The system can realize the functions of harmonic monitoring and analysis of the wave recording file:
after the relay protection information master station completes the acquisition of the full-network automatic wave recording file, the wave recording file harmonic monitoring analysis and alarm module opens the wave recording file to find the zero moment point of the whole point, and generates the full-network wave recording file harmonic monitoring report section file according to the following file format:
substation name, file generation time, anomaly flag:
1. primary equipment name/channel name, identity, unit, total effective value, fundamental effective value, 2 times, 3 times, 5 times, 7 times, abnormal harmonic times;
2. primary equipment name/channel name, identity, unit, total effective value, fundamental effective value, 2 times, 3 times, 5 times, 7 times, abnormal harmonic times;
3. primary equipment name/channel name, identity, unit, total effective value, fundamental effective value, 2 times, 3 times, 5 times, 7 times, abnormal harmonic times;
………
(3) The system can realize the function of harmonic dynamic visual display based on a geographic wiring diagram:
as shown in fig. 3, the master station side provides a harmonic state monitoring master interface based on a geographical wiring diagram, the analysis result of each transformer substation on the geographical wiring diagram is displayed by icons with different colors, black marks are normal, gray marks are abnormal, and white marks are not analyzed. Double clicking the substation may pop up a report form of the harmonic analysis.
The report forms are presented in the following format:
(4) The system can realize the functions of writing in and generating a harmonic analysis statistical report form:
the analysis result of each harmonic section is written into a database, the primary equipment with abnormal harmonic is alarmed, the analysis result is written into a history database, the generation of harmonic analysis reports according to different statistical calibers is supported, the starting time of the abnormal harmonic can be inquired according to a transformer substation and the primary equipment, and the change trend curves of 2, 3, 5 and 7 times of harmonic are displayed.
The specific implementation manner of this embodiment may be referred to the related description in the foregoing embodiment, which is not repeated herein.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
It should be noted that in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "plurality" means at least two.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
By adopting the system for realizing the online monitoring and processing of the harmonic waves of the large power grid, the dynamic monitoring, analysis and traceability of the harmonic voltages, currents and the like of the new power grid station and the hub substation can be realized rapidly by modifying and upgrading the relay protection information main station software installed at the new power grid station end and the hub substation relay protection information sub station and the relay protection information main station at the control end, and data support is provided for the treatment of the harmonic waves.
In this specification, the invention has been described with reference to specific embodiments thereof. It will be apparent, however, that various modifications and changes may be made without departing from the spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (9)
1. A system for realizing the on-line monitoring and processing of the harmonic waves of a large power grid is characterized by comprising a wave recorder, a relay protection device, a relay protection information substation, a relay protection information master station and a GPS time synchronization module,
the input end of the wave recorder is connected with the transformer substation, and is used for carrying out high-frequency sampling on the voltage and the current of the transformer substation, and triggering the wave recording function in a remote starting mode to generate a wave recording file;
the relay protection device is connected with a transformer substation line;
the relay protection information substation is communicated with the line wave recorder, the transformer wave recorder and the relay protection device in a connecting way, is used for performing protocol conversion, collecting and remotely transmitting the wave recording file and relay protection information of the wave recorder, and supporting responding to a command of remotely starting the wave recorder of an external system;
the relay protection information master station is connected and communicated with the relay protection information sub-stations and is used for remotely starting the fault wave recording function of the wave recorder, carrying out periodic analysis and statistics on recorded and broadcast files and monitoring power grid harmonic waves on line;
the GPS time synchronization module acquires standard time signals from GPS satellites and transmits the standard time signals to the oscillograph, the relay protection device, the relay protection information substation and the relay protection information master station, and the GPS time synchronization module is used for realizing the synchronization of data time marks of all the devices;
the relay protection information main station remotely triggers the fault wave recording function of the wave recorder, so that the relay protection information sub-station generates and uploads the power grid voltage and current section data synchronized with the whole grid, secondary processing is carried out on the acquired data, and harmonic monitoring of the power grid is realized by carrying out data analysis on the processed data.
2. The system for realizing the online monitoring and processing of the harmonic waves of the large power grid according to claim 1, wherein the relay protection information master station comprises a harmonic data report analysis module, a harmonic dynamic visual display module, a wave recording file harmonic monitoring analysis and alarm module and a remote starting and automatic calling module of a wave recorder, and the harmonic data report analysis module, the harmonic dynamic visual display module, the wave recording file harmonic monitoring analysis and alarm module and the remote starting and automatic calling module of the wave recorder are all connected with a relay protection information substation;
the remote starting and automatic calling module of the recorder is used for automatically sending a remote starting command to the recorder through the relay protection information substation according to a set rule and automatically downloading a record file which is newly generated by the recorder;
the wave recording file harmonic monitoring analysis and alarm module is connected with the wave recorder remote starting and automatic calling module and is used for carrying out harmonic analysis on the latest wave recording file, generating a full-network wave recording file harmonic monitoring report section file and sending alarm information when abnormality is found;
the harmonic dynamic visual display module is connected with the wave recording file harmonic monitoring analysis and alarm module and is used for displaying the latest harmonic analysis result;
the harmonic data report module is connected with the harmonic dynamic visual display module and is used for displaying the harmonic monitoring report section file of the whole network wave recording file and the change trend curve of the alarm event according to time periods.
3. The system for realizing the online monitoring and processing of the large power grid harmonic wave according to claim 1, wherein the wave recorder comprises a line wave recorder and a transformer wave recorder, the line wave recorder is connected with a transformer substation and is used for carrying out high-frequency sampling on line working voltage and current of the transformer substation, recording a steady-state process and a transient-state process of a power system and triggering to generate a wave recording file in a remote starting mode;
the transformer oscillograph is connected with the transformer substation and is used for performing high-frequency sampling on transformer working voltage and current of the transformer substation, recording steady-state process and transient-state process of the power system and triggering generation of oscillograph files in a remote starting mode.
4. The system for realizing the online monitoring and processing of the harmonic waves of the large power grid according to claim 2, wherein the remote starting and automatic calling module of the recorder issues a remote starting command at the whole point time, and the harmonic files are acquired in a mode of steady state period acquisition at the whole point time.
5. The system for realizing the on-line monitoring and processing of the harmonic wave of the large power grid according to claim 4, wherein the remote starting and automatic calling module of the recorder comprises a remote starting test unit, the remote starting test unit is connected with the recorder through a relay protection information substation, the output end of the remote starting test unit is connected with a harmonic wave monitoring analysis and alarm module of the record file, and the system is used for carrying out a remote starting test before issuing a remote starting command and specifically comprises the following steps:
recording the time of command sending time; reading a time stamp of a first data point in the wave recording file to obtain the generation moment of the wave recording file of the wave recorder; calculating the delay time T delay The method comprises the steps of carrying out a first treatment on the surface of the Advance T before hour whole point delay And sending a recording remote start command by +0.2DeltaT seconds, wherein DeltaT is the data from the recording data to the whole point moment.
6. The system for realizing the online monitoring and processing of the harmonic wave of the large power grid according to claim 2, wherein the harmonic wave monitoring analysis and alarm module of the wave recording file comprises a harmonic wave analysis unit, the input end of the harmonic wave analysis unit is connected with the remote starting and automatic calling module of the wave recorder, and the output end of the harmonic wave analysis unit is connected with the harmonic wave dynamic visualization display module and is used for finding the zero moment point of the whole point through the wave recording file, generating a harmonic wave monitoring report section file of the wave recording file of the whole network and identifying the analysis result of each transformer substation.
7. The system for realizing the online monitoring and processing of the harmonic waves of the large power grid according to claim 2, wherein the harmonic data report analysis module is connected with an external database.
8. The system for realizing the online monitoring and processing of the harmonic waves of the large power grid according to claim 3, wherein the line recorder comprises a line working voltage and current sampling unit, the line working voltage and current sampling unit is connected with a line of a transformer substation and is further connected with a remote starting and automatic calling module of the recorder through a relay protection information substation.
9. The system for realizing the online monitoring and processing of the harmonic waves of the large power grid according to claim 3, wherein the transformer oscillograph comprises a transformer working voltage and current sampling unit, the transformer working voltage and current sampling unit is connected with a transformer of a transformer substation and is further connected with a remote starting and automatic calling module of the oscillograph through a relay protection information substation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116540518A (en) * | 2023-07-04 | 2023-08-04 | 云南电网有限责任公司 | Method and system for judging clock out-of-step of relay protection device through remote wave recording |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116540518A (en) * | 2023-07-04 | 2023-08-04 | 云南电网有限责任公司 | Method and system for judging clock out-of-step of relay protection device through remote wave recording |
| CN116540518B (en) * | 2023-07-04 | 2023-10-13 | 云南电网有限责任公司 | Method and system for judging clock out-of-step of relay protection device through remote wave recording |
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