CN114152814A - Configuration method for wide frequency domain synchronized phasor measurement data interaction of main substation power grid and substation power grid - Google Patents
Configuration method for wide frequency domain synchronized phasor measurement data interaction of main substation power grid and substation power grid Download PDFInfo
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Abstract
The invention provides a configuration method for wide frequency domain synchronous phasor measurement data interaction of a main substation power grid, which follows a GB/T26865.2 data transmission protocol, when a substation transmits wide frequency domain synchronous phasor measurement data of the power grid to a main station in real time, a configuration frame of the real-time transmission data is configured to increase the number of phasor channels, analog quantity channels and switching quantity channels, and a data frame of the real-time transmission data is configured to increase data names and data types corresponding to the phasor channels, the analog quantity channels and the switching quantity channels; and (3) sending synchronous phasor measurement data according to the frequency domain characteristics when the event occurs, configuring a trigger mark of a data frame status word STAT phase measurement device of real-time transmission data into 1, and correspondingly configuring a trigger reason. The method and the device complete the transmission of harmonic/inter-harmonic data, improve the monitoring capability of the power grid on disturbance components of different harmonic frequencies, and reduce the operation risk of the power grid.
Description
Technical Field
The invention relates to a design of a wide frequency domain synchronous phasor measurement data interaction method for a main substation power grid, which comprises main substation communication and power system real-time dynamic monitoring and belongs to the technical field of power system automation.
Background
The synchrophasor measurement technology is originated in the early 80 th of the 20 th century, and refers to the steps of synchronously sampling voltages and currents of different nodes of a power system under a time scale unified by the whole network (generally, time provided by a GPS is taken as a standard), generating synchrophasors of the voltages and currents of the nodes, and analyzing the state of the power system on a unified time coordinate system. The power frequency domain fundamental wave synchronous phasor measurement device is abbreviated as pmu (power management unit).
With the rapid development of a direct current transmission technology, a new energy power generation technology and an FACTS technology, a large number of power electronic devices are connected to a traditional power grid, the disturbance phenomena of power grid harmonic interference, subsynchronous oscillation and the like are more frequent, the power supply quality is seriously polluted, and the safety, stability and economic operation of a power system are seriously damaged. Meanwhile, the modernization of electricity utilization puts higher demands on the quality of electric energy. The key point of solving the above-mentioned problem lies in that the frequency, the amplitude change condition of accurate grasp harmonic, interharmonic, traditional power frequency domain synchrophasor measuring device PMU only can monitor the fundamental wave, can't adapt to the prior art needs, and wide frequency domain synchrophasor measuring device develops from this. However, the conventional power data monitoring specification GB/T26865.2 and the general technical condition DL/T280-2012 of the synchronous phasor measurement device of the power system do not provide the related technical requirements for the interaction of the measurement data in the wide frequency domain.
Disclosure of Invention
The invention provides a configuration method of a wide frequency domain synchronous phasor measurement data interaction file of a main substation power grid, aiming at solving the problem that the wide frequency domain measurement data is absent in the real-time dynamic monitoring of a power system due to the fact that no interaction method aiming at the wide frequency domain measurement data exists at present, so as to meet the technical requirement that a transformer substation uploads the wide frequency measurement data to a WAMS main station.
In order to achieve the technical purpose, the invention adopts the following technical scheme.
The invention provides a configuration method for wide frequency domain synchronized phasor measurement data interaction of a main substation power grid, wherein the wide frequency domain synchronized phasor measurement data interaction of the main substation power grid follows a GB/T26865.2 data transmission protocol, and the configuration method comprises the following steps:
when the substation transmits the wide frequency domain synchronous phasor measurement data of the power grid to the master station in real time, the configuration frame of the real-time transmission data is configured to increase the number of phasor channels, analog quantity channels and switching value channels, and the data frame of the real-time transmission data is configured to increase data names and data types corresponding to the phasor channels, the analog quantity channels and the switching value channels; and (3) sending synchronous phasor measurement data according to the frequency domain characteristics when the event occurs, configuring a trigger mark of a data frame status word STAT phase measurement device of real-time transmission data into 1, and correspondingly configuring a trigger reason.
Furthermore, when the substation transmits the power grid wide frequency domain synchronized phasor measurement data to the master station offline, the content transmitted in the data frame of offline data transmission is configured as an encrypted transient recording file generated by event-triggered wideband domain synchronized phasor measurement, and the TYPE field of the data frame of offline data transmission is configured with a data compression format identifier for selection.
Still further, the data compression format identifiers for selection are configured in the TYPE fields Bits 15-12 of the offline data transmission offline data frame, and include no compression, gz data compression format, zip data compression format, and zstd data compression format.
Further, the event is at least one of harmonic oscillation, inter-harmonic oscillation, power frequency oscillation, subsynchronous oscillation and supersynchronous oscillation.
Further, the data types corresponding to the phasor channels include: harmonic voltage phasors, harmonic voltage amplitudes, harmonic voltage angles or radians, harmonic current phasors, harmonic current amplitudes, harmonic current angles or radians, inter-harmonic voltage phasors, inter-harmonic voltage amplitudes, inter-harmonic voltage angles or radians, inter-harmonic current phasors, inter-harmonic current amplitudes, inter-harmonic current angles or radians, sub-synchronous voltage phasors, super-synchronous voltage phasors, sub-synchronous current phasors, super-synchronous current phasors, and power oscillation frequencies.
Further, the data types corresponding to the analog channels include: harmonic voltage frequency, harmonic current frequency, inter-harmonic voltage frequency, inter-harmonic current frequency, subsynchronous oscillation frequency, hypersynchronous oscillation frequency, subsynchronous oscillation power, hypersynchronous oscillation power, broadband oscillation frequency, broadband oscillation power, subsynchronous oscillation power, hypersynchronous voltage frequency, subsynchronous oscillation power, hypersynchronous current frequency, and power oscillation frequency.
Further, the data types corresponding to the switching value channels include: low frequency oscillation power out-of-limit alarm, subsynchronous oscillation power out-of-limit alarm, wideband oscillation power out-of-limit alarm, subsynchronous current out-of-limit alarm, oversynchronous current out-of-limit alarm, harmonic current out-of-limit alarm, inter-harmonic current out-of-limit alarm, harmonic voltage out-of-limit alarm, and inter-harmonic voltage out-of-limit alarm.
Further, the data frame of the real-time transmission data is also configured to add a substation unit, a master station conversion ratio, or a master station unit attribute corresponding to the phasor channel, the analog quantity channel, and the switching quantity channel.
Further, a command identifier for configuring the master station to transmit the continuous wave recording data to the substation is added in the offline data transmission command frame.
Further, a command identifier for configuring the statistical analysis file data transmitted from the master station to the substation is added to the offline data transmission command frame.
The invention has the following beneficial technical effects:
the invention increases the transmission of harmonic wave and inter-harmonic wave data based on the prior PMU protocol framework, does not expand the message types and formats, completes the complete transmission of the harmonic wave/inter-harmonic wave data only by defining and expanding the real-time and off-line transmission measurement data and designing the data organization mode, improves the monitoring capability of a power grid on disturbance components of different harmonic wave frequencies, and reduces the operation risk of the power grid. The technical advantages of the invention are as follows:
(1) the method is consistent with the transmission, storage and application modes of the prior PMU phasor real-time data (following GB/T26865.2), and the WAMS front-end module and the time sequence library module of the prior each regulation and control center master station system do not need to be greatly changed;
(2) the format of the off-line data recording file is consistent with that of the off-line data recording file stored by the prior PMU, and the off-line data transmission tool and the data analysis tool do not need to be greatly changed.
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Fig. 1 is a schematic diagram of interaction of synchronized phasor measurement data in a wide frequency domain of a power network of a main substation according to the present invention.
Detailed Description
The invention is further described below with reference to the figures and the specific examples.
The embodiment one is a method for configuring synchronized phasor measurement data in a wide frequency domain of a power network of a master substation and a substation, as shown in fig. 1, the method is used for data interaction between a master station (WAMS master station end) and the substation (substation end wideband measurement processing unit), and the process of the method follows the content of the technical requirement of GB/T26865.2 power real-time data monitoring. The optional substation (substation-side broadband measurement processing unit) is connected with a plurality of broadband synchronous phasor measurement devices.
The configuration method is realized at a substation end, and a main station (WAMS main station end) only needs to upgrade related protocols. The substation (substation-end broadband measurement processing unit) has the functions of receiving and analyzing data messages transmitted by the broadband measurement device in real time, including dynamic data transmission messages, offline data transmission messages and files. The substation (substation-side broadband measurement processing unit) also has the functions of forwarding in-station broadband measurement data including raw measurement data, preprocessing analysis data and diagnosis analysis result data to a plurality of main stations in real time and has a phasor data transmission function.
When the substation transmits the wide frequency domain synchronous phasor measurement data of the power grid to the master station in real time, the configuration frame of the real-time transmission data is configured to increase the number of phasor channels, analog quantity channels and switching value channels, and the data frame of the real-time transmission data is configured to increase data names and data types corresponding to the phasor channels, the analog quantity channels and the switching value channels; and (3) sending synchronous phasor measurement data according to the frequency domain characteristics when the event occurs, configuring a trigger mark of a data frame status word STAT phase measurement device of real-time transmission data into 1, and correspondingly configuring a trigger reason.
The above event may be at least one of harmonic oscillation, inter-harmonic oscillation, power frequency oscillation, subsynchronous oscillation, and supersynchronous oscillation.
Optionally, in a specific embodiment, the configuration frame for real-time data transmission includes a channel name of a wide-band measurement device extended harmonic/inter-harmonic phasor and an analog quantity; configuring an extended channel naming field in the configuration frame, wherein the extended channel naming field comprises the number of phasor channels, analog quantity channels and switching value channels; and configuring attributes such as data names, data types, substation units, master station conversion ratios, master station units and the like corresponding to the quantities of the phasor channels, the analog quantity channels and the switching quantity channels in the data frames.
The expanded phasor channel of the configuration frame contains UxH, UxJ, UxL, IxH, IxJ, IxL, UxI, UxM, UxN, IxI, IxM, IxN, UxS, IxS and PIS in the expanded data name; the extended phasor channel of the configuration frame is also embodied in that the extended data type includes harmonic voltage phasor, harmonic voltage amplitude, harmonic voltage angle (radian), harmonic current phasor, harmonic current amplitude, harmonic current angle (radian), inter-harmonic voltage phasor, inter-harmonic voltage amplitude, inter-harmonic voltage angle (radian), inter-harmonic current phasor, inter-harmonic current amplitude, inter-harmonic current angle (radian), sub/super-synchronous voltage phasor, sub/super-synchronous current phasor, power oscillation;
the expanded analog quantity channel of the configuration frame contains UxK, IxK, UxF, IxF, SFN, SPN, WSF, WSP, UxL, IxL and PSL in the expanded data name; the expanded analog quantity channel of the configuration frame has the expanded data types including harmonic voltage frequency, harmonic current frequency, inter-harmonic voltage frequency, inter-harmonic current frequency, sub/super synchronous oscillation power, broadband oscillation frequency, broadband oscillation power, sub/super synchronous voltage frequency, sub/super synchronous current frequency and power oscillation frequency;
the expanded switching value channel of the configuration frame contains PSO, PSA, PBA, ISA, IHA, IIA, UHA and UIA in the expanded data name; the expanded data types of the expanded switching value channel of the configuration frame comprise low-frequency oscillation power out-of-limit alarm, subsynchronous oscillation power out-of-limit alarm, broadband oscillation power out-of-limit alarm, subsynchronous/supersynchronous current out-of-limit alarm, harmonic current out-of-limit alarm, inter-harmonic current out-of-limit alarm, harmonic voltage out-of-limit alarm and inter-harmonic voltage out-of-limit alarm;
the naming of the extended channel of the configuration frame is specifically shown in table 1;
TABLE 1 real-time data Transmission configuration frame extension channel naming extension
The data frame (real-time data frame) comprises a transient state recording which is required to trigger the device when the broadband measuring device detects events such as harmonic oscillation, inter-harmonic oscillation, power frequency oscillation, subsynchronous oscillation or supersynchronous oscillation and the like, and the Bit11 of the data frame status word STAT is set to be 1, and the Bit03-00 is set to be a trigger reason;
the data frame, defining STAT field part content, is modified and expanded based on the content of table 4 in GB/T26865.2.
The data frame, a trigger mark extension part, a Bit11 harmonic/inter-harmonic amplitude out-of-limit and broadband oscillation time setting;
the data frame, trigger cause extension, is encoded as 1010: harmonic/inter-harmonic amplitude off-limit, 1001: subsynchronous/supersynchronous oscillation, 1011: carrying out broadband oscillation;
the extension of the STAT field of the data frame is specifically shown in table 2;
TABLE 2 STAT field extension for real-time data transfer data frame
The second embodiment provides a method for configuring synchronized phasor measurement data of a power grid of a master station and a substation, and the method further includes configuring, by the substation, encrypted harmonic oscillation, inter-harmonic oscillation, power frequency oscillation, sub-synchronous oscillation or transient recording file generated by triggering of a super-synchronous oscillation event in a data frame transmitted by offline data when the substation transmits the synchronized phasor measurement data of the power grid to the master station offline, and configuring, in a TYPE field of the data frame transmitted by offline data, a data compression format identifier for selection. Including configuring offline transmission data frames and offline transmission command frames.
The broadband measuring device can directly transmit the compressed and stored off-line data as required, and the master station starts a corresponding decompression algorithm to decompress the received compressed file according to the value of the TYPE field Bits 15-12 in the off-line data frame;
newly extending HDR files in the TYPEs 3-0 in the TYPE field, wherein the HDR files are used for transmitting fault recording report files generated by the broadband measuring device.
The TYPE field extension of the offline transmission data frame is specifically shown in table 3;
table 3 offline data transmission offline data frame TYPE field extension
The HDR file naming in the off-line transmission data frame is named according to the naming rule of GB/T26865.2 annex E.5 history file, wherein a suffix occupies 3 bytes, and a fault recording report file suffix is HDR.
An example of the naming of the HDR file in the TYPE field of the offline transmission data frame is specifically shown in table 4;
table 4 example HDR file naming in offline data frame for offline data transfer
Third embodiment, on the basis of the second embodiment, the present embodiment includes adding, in the offline data transmission command frame, a command identifier for configuring the master station to transmit the continuous wave recording data to the slave station, where the command identifier is an extended command CMD _ ldredflow, and the command is sent only from the master station to the slave station.
Optionally, in a specific embodiment, a command identifier for configuring the statistical analysis file data transmitted by the master station to the substation is added to the offline data transmission command frame. The command is identified as an extended command CMD _ LDSTAFLOW-the command is sent only by the master station to the slave station.
The detailed descriptions of the extension and parameter fields of the offline transmission command frame are shown in tables 5 and 6.
TABLE 5 command extension for offline data transfer command frame
TABLE 6 Command parameter field extension description
The invention relates to a real-time data transmission method between a main station and a sub station, which comprises the related requirements of a real-time data frame;
relates to an off-line data transmission method between a main station and a sub-station, which comprises the related requirements of off-line data frames.
The real-time transmission data frame format is divided into four types of frame formats, namely a data frame, a configuration frame, a header frame and a command frame, and is characterized in that the design of the invention is expanded by the requirements of the configuration frame and the data frame; the data frame is a STAT status word extension;
the configuration frame is a wideband measurement channel name extension; the broadband measurement channel name is expanded, data points are correspondingly added in the phasor channel, the analog quantity channel and the switching value channel, and attributes such as data names, data types, substation units, master station conversion ratios and master station units corresponding to the data points are correspondingly added.
The invention relates to an off-line transmission frame format, which is divided into four types of frame formats, namely an off-line transmission command frame, an off-line event identification frame, an off-line transmission data frame and an off-line file directory frame; the method comprises the steps of transmitting a data frame in an off-line mode, wherein a TYPE field is expanded, a corresponding decompression algorithm is required to be started for decompression in part of bits of the TYPE field, and an HDR file is expanded to be used for transmitting a fault recording report file generated by a broadband measuring device;
command frames are transmitted offline, and command CMD _ LDECFLOW and CMD _ LDSTAFLOW are expanded, wherein the command is only sent from the master station to the slave station.
HDR file (offline file) naming in the offline transmission data frame, HDR file naming specification, naming specification in TYPE field according to naming rule of GB/T26865.2 appendix E.5 history file, and a suffix of 3 bytes, wherein the suffix of fault recording report file is HDR.
In summary, the method provided by the invention is executed according to the related technical requirements of GB/T26865.2, and increases the transmission of harmonic and inter-harmonic data based on the existing PMU protocol framework, without expanding the message types and formats, and only by defining and expanding the real-time and offline transmission measurement data, and designing the data organization manner, complete transmission of harmonic/inter-harmonic data is completed, the monitoring capability of the power grid for different harmonic frequency disturbance components is improved, and the power grid operation risk is reduced.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The configuration method for wide frequency domain synchronized phasor measurement data interaction of the main substation power grid is characterized in that the wide frequency domain synchronized phasor measurement data interaction of the main substation power grid follows a GB/T26865.2 data transmission protocol, and the configuration method comprises the following steps:
when the substation transmits the wide frequency domain synchronous phasor measurement data of the power grid to the master station in real time, the configuration frame of the real-time transmission data is configured to increase the number of phasor channels, analog quantity channels and switching value channels, and the data frame of the real-time transmission data is configured to increase data names and data types corresponding to the phasor channels, the analog quantity channels and the switching value channels; and (3) sending synchronous phasor measurement data according to the frequency domain characteristics when the event occurs, configuring a trigger mark of a data frame status word STAT phase measurement device of real-time transmission data into 1, and correspondingly configuring a trigger reason.
2. The configuration method for interaction of synchronized phasor measurement data of power grid width frequency domain of master station according to claim 1, further comprising configuring, by the slave station, the content transmitted in the data frame of offline data transmission as a transient recording file generated by event-triggered encrypted synchronized phasor measurement of broadband frequency domain when offline transmitting synchronized phasor measurement data of power grid width frequency domain to the master station, and configuring, in the TYPE field of the data frame of offline data transmission, the TYPE field including a data compression format identifier for selection.
3. The method for configuring synchronized phasor measurement data interaction in wide frequency domain of a main substation power grid according to claim 2, wherein said selectable data compression format identifier is configured in said offline data transmission offline data frame TYPE fields Bits 15-12, and comprises no compression, gz data compression format, zip data compression format and zstd data compression format.
4. The method for configuring synchronized phasor measurement data interaction of a main station and substation power grid in wide frequency domain according to any one of claim 1 or claim 2, wherein said event is at least one of harmonic oscillation, inter-harmonic oscillation, power frequency oscillation, subsynchronous oscillation and supersynchronous oscillation.
5. The method for configuring synchronized phasor measurement data interaction in wide frequency domain of a main substation power grid according to claim 1, wherein the data types corresponding to phasor channels include: harmonic voltage phasors, harmonic voltage amplitudes, harmonic voltage angles or radians, harmonic current phasors, harmonic current amplitudes, harmonic current angles or radians, inter-harmonic voltage phasors, inter-harmonic voltage amplitudes, inter-harmonic voltage angles or radians, inter-harmonic current phasors, inter-harmonic current amplitudes, inter-harmonic current angles or radians, sub-synchronous voltage phasors, super-synchronous voltage phasors, sub-synchronous current phasors, super-synchronous current phasors, and power oscillation frequencies.
6. The method for configuring synchronized phasor measurement data interaction in wide frequency domain of a main substation power grid according to claim 1, wherein the data types corresponding to the analog quantity channels include: harmonic voltage frequency, harmonic current frequency, inter-harmonic voltage frequency, inter-harmonic current frequency, subsynchronous oscillation frequency, hypersynchronous oscillation frequency, subsynchronous oscillation power, hypersynchronous oscillation power, broadband oscillation frequency, broadband oscillation power, subsynchronous oscillation power, hypersynchronous voltage frequency, subsynchronous oscillation power, hypersynchronous current frequency, and power oscillation frequency.
7. The method for configuring synchronized phasor measurement data interaction in wide frequency domain of a main substation power grid according to claim 1, wherein the data types corresponding to the switching value channels include: low frequency oscillation power out-of-limit alarm, subsynchronous oscillation power out-of-limit alarm, wideband oscillation power out-of-limit alarm, subsynchronous current out-of-limit alarm, oversynchronous current out-of-limit alarm, harmonic current out-of-limit alarm, inter-harmonic current out-of-limit alarm, harmonic voltage out-of-limit alarm, and inter-harmonic voltage out-of-limit alarm.
8. The method of claim 1, wherein the data frame of the real-time transmission data is further configured to increase substation units, master station scaling ratios or master station unit attributes corresponding to the phasor channel, the analog quantity channel and the switching quantity channel.
9. The method for configuring interaction of synchronized phasor measurement data in wide frequency domain of a power grid of a master station and a substation according to claim 1, wherein a command identifier for configuring continuous wave recording data transmitted from the master station to the substation is added to an offline data transmission command frame.
10. The method for configuring interaction of synchronized phasor measurement data in wide frequency domain of a power grid of a master station and a substation according to claim 1, wherein a command identifier for configuring statistical analysis file data transmitted from the master station to the substation is added to an offline data transmission command frame.
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| 吴艳平;姚建国;常乃超;张琦兵;樊陈;窦仁晖;: "多功能宽频测量装置的设计与实现", 电力系统自动化, no. 20, pages 205 - 212 * |
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