CN116436030A - New energy station broadband oscillation on-site monitoring control method and device - Google Patents

New energy station broadband oscillation on-site monitoring control method and device Download PDF

Info

Publication number
CN116436030A
CN116436030A CN202310277317.9A CN202310277317A CN116436030A CN 116436030 A CN116436030 A CN 116436030A CN 202310277317 A CN202310277317 A CN 202310277317A CN 116436030 A CN116436030 A CN 116436030A
Authority
CN
China
Prior art keywords
new energy
broadband
bus
mode
unit group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310277317.9A
Other languages
Chinese (zh)
Inventor
易善军
李原
谢小荣
马宁嘉
陈璐
苏鹏
戴幸涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsinghua University
State Grid Eastern Inner Mongolia Power Co Ltd
Original Assignee
Tsinghua University
State Grid Eastern Inner Mongolia Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tsinghua University, State Grid Eastern Inner Mongolia Power Co Ltd filed Critical Tsinghua University
Priority to CN202310277317.9A priority Critical patent/CN116436030A/en
Publication of CN116436030A publication Critical patent/CN116436030A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
    • H02J3/241—The oscillation concerning frequency
    • 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
    • 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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • 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
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation

Abstract

The application relates to the technical field of power systems, in particular to a method and a device for in-situ monitoring and controlling broadband oscillation of a new energy station, wherein the method comprises the following steps: collecting bus broadband voltage phasor measurement data and new energy unit group feeder broadband current phasor measurement data in the new energy station, calculating equivalent admittances corresponding to all modes on the bus, judging whether the real part is larger than zero, judging that broadband oscillation stability of the new energy station meets the requirement if the real part is larger than zero, otherwise judging that the new energy station has broadband oscillation risk and optimizing. According to the embodiment of the application, the broadband oscillation of the station can be monitored and restrained on site based on the actual measurement data of the bus voltage of the new energy station and the feeder current of the new energy unit group so as to acquire the stability condition of the broadband oscillation of the new energy station in real time and optimize the stability condition in time aiming at potential risks, so that the safety of an electric power system is maintained, the speed and efficiency of the risk response of the new energy station are improved, and the system is more reliable.

Description

New energy station broadband oscillation on-site monitoring control method and device
Technical Field
The application relates to the technical field of power systems, in particular to a method and a device for in-situ monitoring and controlling broadband oscillation of a new energy station.
Background
The new energy power generation and the flexible AC/DC power transmission and transformation gradually become the development trend of a novel power system, wherein the broadband oscillation caused by the interaction between the power electronic converters and the power grid influences the equipment safety, the system stability and the power quality of the modern power grid.
In the related art, the broadband oscillation monitoring and controlling method is mainly carried out in a mode of combining the substation with the main station, so that the wind power is prevented from being cut off in a large scale for many times, and the wind discarding effect is avoided.
However, in the related art, the combination mode of the substation and the master station cannot realize the timely optimization of the broadband oscillation of the new energy station, is mainly oriented to the wide area monitoring and control of the new energy power system or the regional power grid, is difficult to suppress the broadband oscillation in situ, cannot realize the efficient real-time discovery and in situ solution of the security hole of the power system, and has insufficient reliability and practicability, so that the problem needs to be solved.
Disclosure of Invention
The application provides a method and a device for in-situ monitoring and controlling broadband oscillation of a new energy station, which are used for solving the problems that in the related art, the combination mode of a substation and a main station cannot realize the in-time optimization of the broadband oscillation of the new energy station, and the broadband oscillation is difficult to inhibit in-situ by mainly aiming at wide-area monitoring and controlling of a new energy power system or a regional power grid, and the problems of low reliability, practicability and the like cannot be realized in real time and the high efficiency of discovery aiming at the security hole of the power system can not be realized.
An embodiment of a first aspect of the present application provides a method for in-situ monitoring and controlling broadband oscillation of a new energy station, including the following steps: collecting broadband voltage phasor measurement data of a bus in a new energy station and broadband current phasor measurement data of a new energy unit group feeder; calculating equivalent admittances corresponding to all modes on a bus according to the bus broadband voltage phasor measurement data and the new energy unit group feeder broadband current phasor measurement data, and judging whether the real part of the equivalent admittance corresponding to all modes is larger than zero or not; and if the real part of the equivalent admittance corresponding to each mode is larger than zero, judging that the broadband oscillation stability of the new energy station meets the requirement, otherwise, judging that the broadband oscillation risk exists on the frequency corresponding to the mode of which the real part is smaller than or equal to zero for optimization.
Specifically, in one embodiment of the present application, the calculation formula of the equivalent admittance corresponding to each mode on the bus is:
Figure BDA0004136806280000021
wherein Y is k For the equivalent admittance corresponding to the kth mode on the bus,
Figure BDA0004136806280000022
broadband voltage phasors for bus corresponding to the kth mode,/->
Figure BDA0004136806280000023
The broadband current phasors of the new energy unit group feeder i are the total number of new energy unit group feeders of the bus, k=1.
Optionally, in an embodiment of the present application, the determining that the new energy station has a risk of broadband oscillation at a frequency corresponding to a mode with a real part less than or equal to zero, includes: calculating the equivalent admittance of modes of which the real part of the new energy unit group feeder line is smaller than or equal to zero; cutting off the feeder line with the minimum equivalent admittance real part in all new energy unit group feeder lines so as to re-acquire the bus broadband voltage phasor measurement data and the new energy unit group feeder line broadband current phasor measurement data.
Specifically, in one embodiment of the present application, the calculation formula of the equivalent admittance of the mode with the real part smaller than or equal to zero is:
Figure BDA0004136806280000024
wherein Y is ip Is the equivalent admittance corresponding to the p-th mode of the new energy unit group feeder i,
Figure BDA0004136806280000025
broadband current phasors of new energy unit group feeder i corresponding to the p-th mode>
Figure BDA0004136806280000026
And the broadband voltage phasor of the bus corresponding to the p-th mode is obtained.
An embodiment of a second aspect of the present application provides a device for in-situ monitoring and controlling broadband oscillation of a new energy station, including: the acquisition module is used for acquiring broadband voltage phasor measurement data of a bus in the new energy station and broadband current phasor measurement data of a new energy unit group feeder; the judging module is used for calculating the equivalent admittance corresponding to each mode on the bus according to the bus broadband voltage phasor measurement data and the new energy unit group feeder broadband current phasor measurement data, and judging whether the real part of the equivalent admittance corresponding to each mode is larger than zero or not; and the control module is used for judging that the broadband oscillation stability of the new energy station meets the requirement when the real part of the equivalent admittance corresponding to each mode is larger than zero, otherwise, judging that the new energy station has broadband oscillation risk on the frequency corresponding to the mode with the real part smaller than or equal to zero so as to optimize.
Specifically, in one embodiment of the present application, the calculation formula of the equivalent admittance corresponding to each mode on the bus is:
Figure BDA0004136806280000027
wherein Y is k For the equivalent admittance corresponding to the kth mode on the bus,
Figure BDA0004136806280000028
broadband voltage phasors for bus corresponding to the kth mode,/->
Figure BDA0004136806280000029
The broadband current phasors of the new energy unit group feeder i are the total number of new energy unit group feeders of the bus, k=1.
Optionally, in one embodiment of the present application, the control module includes: the computing unit is used for computing the equivalent admittance of the mode of which the real part of the new energy unit group feeder is smaller than or equal to zero; the cutting unit is used for cutting off the feeder line with the minimum equivalent admittance real part in all new energy unit group feeder lines so as to re-acquire the bus broadband voltage phasor measurement data and the new energy unit group feeder line broadband current phasor measurement data.
Specifically, in one embodiment of the present application, the calculation formula of the equivalent admittance of the mode with the real part smaller than or equal to zero is:
Figure BDA0004136806280000031
wherein Y is ip Is the equivalent admittance corresponding to the p-th mode of the new energy unit group feeder i,
Figure BDA0004136806280000032
broadband current phasors of new energy unit group feeder i corresponding to the p-th mode>
Figure BDA0004136806280000033
And the broadband voltage phasor of the bus corresponding to the p-th mode is obtained.
An embodiment of a third aspect of the present application provides an electronic device, including: the system comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to realize the in-situ monitoring control method for the broadband oscillation of the new energy station according to the embodiment.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium storing a computer program, which when executed by a processor implements the above method for in-situ monitoring and controlling broadband oscillation of a new energy station.
According to the embodiment of the application, the broadband oscillation of the station can be monitored and restrained on site based on the actual measurement data of the bus voltage of the new energy station and the feeder current of the new energy unit group so as to acquire the stability condition of the broadband oscillation of the new energy station in real time and optimize the stability condition in time aiming at potential risks, so that the safety of an electric power system is maintained, the speed and efficiency of the risk response of the new energy station are improved, and the system is more reliable. Therefore, the problems that in the related art, the combination mode of the substation and the main station cannot realize the timely optimization of the broadband oscillation of the new energy station, the wide area monitoring and the control of a new energy power system or a regional power grid are mainly oriented, the broadband oscillation is difficult to suppress in situ, the efficient real-time discovery and in situ solution of the security hole of the power system cannot be realized, the reliability and the practicability are insufficient and the like are solved.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a flow chart of a method for in-situ monitoring and controlling broadband oscillation of a new energy station according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a new energy station in-situ monitoring control system according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a broadband oscillation in-situ monitoring controller of a new energy station according to an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating a process of in-situ monitoring and controlling broadband oscillation of a new energy station according to one embodiment of the present application;
FIG. 5 is a schematic diagram of a device for in-situ monitoring and controlling broadband oscillation of a new energy station according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.
The method and the device for in-situ monitoring and controlling the broadband oscillation of the new energy station in the embodiment of the application are described below with reference to the accompanying drawings. Aiming at the problems that in the related art mentioned in the background art, the combination mode of the substation and the main station cannot realize the timely optimization of the broadband oscillation of the new energy station, is mainly oriented to the wide area monitoring and control of a new energy power system or a regional power grid, is difficult to suppress the broadband oscillation on site, and cannot realize the efficient real-time discovery and on-site solution of the security holes of the power system, and the reliability and the practicability are insufficient, the application provides the on-site monitoring and controlling method for the broadband oscillation of the new energy station. Therefore, the problems that in the related art, the combination mode of the substation and the main station cannot realize the timely optimization of the broadband oscillation of the new energy station, the wide area monitoring and the control of a new energy power system or a regional power grid are mainly oriented, the broadband oscillation is difficult to suppress in situ, the efficient real-time discovery and in situ solution of the security hole of the power system cannot be realized, the reliability and the practicability are insufficient and the like are solved.
Specifically, fig. 1 is a flow chart of a method for in-situ monitoring and controlling broadband oscillation of a new energy station according to an embodiment of the present application.
As shown in FIG. 1, the method for in-situ monitoring and controlling the broadband oscillation of the new energy station comprises the following steps:
in step S101, broadband voltage phasor measurement data of a bus in the new energy station and broadband current phasor measurement data of a new energy unit group feeder are collected.
It is understood that in embodiments of the present application, the acquisition of measurement data may be obtained by a broadband phasor measurement and broadband oscillation in-situ monitoring controller.
In some embodiments, the broadband phasor measurement and broadband oscillation in-situ monitoring controller may be installed in the new energy station to obtain the broadband voltage phasor measurement data of the bus in the new energy station and the broadband current phasor measurement data of the new energy unit group feeder in real time. Referring to FIG. 2, a schematic diagram of an in-situ monitoring control system for a new energy station according to an embodiment of the present application is shown, which can be used as an implementation form of the in-situ monitoring control method for broadband oscillation of a new energy station according to an embodiment of the present application
According to the method and the device for detecting the safety of the power system, broadband voltage phasor measurement data of the bus in the new energy station and broadband current phasor measurement data of the new energy unit group feeder line can be collected, and monitoring data in the new energy station are obtained in real time, so that the safety of the power system is further detected.
In step S102, the equivalent admittances corresponding to the modes on the bus are calculated according to the bus broadband voltage phasor measurement data and the new energy unit group feeder broadband current phasor measurement data, and whether the real part of the equivalent admittance corresponding to the modes is greater than zero is determined.
It can be understood that in the actual implementation process, the obtained bus broadband voltage phasor measurement data and the new energy unit group feeder broadband current phasor measurement data can be measured through the steps, and according to the bus broadband voltage phasor corresponding to each mode in the measurement data and the broadband current phasor corresponding to each new energy unit group feeder under each mode, the equivalent admittance corresponding to each mode on the bus is calculated, and according to the calculation result, whether the real part of the equivalent admittance corresponding to each mode is larger than zero is judged.
According to the embodiment of the application, the equivalent admittance corresponding to each mode on the bus can be calculated according to the bus broadband voltage phasor measurement data and the new energy unit group feeder broadband current phasor measurement data, and whether the real part of the equivalent admittance corresponding to each mode is larger than zero is judged, so that the real-time broadband oscillation condition is obtained by calculation based on the new energy station actual monitoring data, and the reliability of broadband oscillation monitoring is improved.
Specifically, in one embodiment of the present application, the calculation formula of the equivalent admittance corresponding to each mode on the bus is:
Figure BDA0004136806280000051
wherein Y is k For the equivalent admittance corresponding to the kth mode on the bus,
Figure BDA0004136806280000052
broadband voltage phasors for bus corresponding to the kth mode,/->
Figure BDA0004136806280000053
The broadband current phasors of the new energy unit group feeder i are the total number of new energy unit group feeders of the bus, k=1.
It can be understood that in the embodiment of the present application, n modes may be provided, and the bus broadband voltage phasor corresponding to the kth mode is obtained by monitoring data as follows
Figure BDA0004136806280000054
The bus is provided with m new energy unit group feeder lines in total, and broadband current phasors of the new energy unit group feeder line i are obtained through monitoring data to be +.>
Figure BDA0004136806280000055
The equivalent admittance Y corresponding to each mode on the bus is obtained through the calculation k Equivalent admittance Y corresponding to each mode k Whether the real part of (2) is greater than zero, i.e
Re(Y k )>0，
Wherein Y is k For the equivalent admittance corresponding to the kth mode on the bus bar, k=1, 2.
According to the embodiment of the application, the data processing of the real-time monitoring information can be realized through specific formula calculation, so that the basis content for judging the broadband oscillation stability of the new energy station is obtained.
In step S103, if the real part of the equivalent admittance corresponding to each mode is greater than zero, then determining that the broadband oscillation stability of the new energy station meets the requirement, otherwise determining that the new energy station has a broadband oscillation risk on the frequency corresponding to the mode with the real part less than or equal to zero, so as to perform optimization.
Specifically, according to the calculation result of the equivalent admittance corresponding to each mode obtained in the above steps, whether the real part of the equivalent admittance corresponding to each mode on the bus is greater than zero or not can be judged, if each mode on the bus meets that the real part of the equivalent admittance is greater than zero, the broadband oscillation stability of the new energy station meets the requirement, and the data monitoring of the next period is continuously executed. If the real part of equivalent admittance corresponding to one or more modes is smaller than zero, the broadband oscillation stability of the new energy station is considered to be at risk, broadband oscillation can occur on the frequency corresponding to the mode with the real part smaller than or equal to zero on the bus, and an optimization measure response is adopted for the risk condition.
In the actual execution process, the broadband oscillation stability risk existing in the equivalent admittance corresponding to the mode with the real part smaller than or equal to zero on the bus can be optimized, and the specific optimization target is,
Figure BDA0004136806280000061
Y k for the equivalent admittance corresponding to the kth mode on the bus, k=1, 2,..n, n is the total number of modes of the bus, Σi 0c And the I is the sum of fundamental current phasor amplitudes of the cut-off new energy unit group feeder lines, namely the broadband oscillation stability of the new energy station is effectively improved under the condition that the minimum number of the cut-off new energy unit group feeder lines is ensured.
According to the method and the device, when the real part of the equivalent admittance corresponding to each mode is larger than zero, broadband oscillation stability of the new energy station can be judged to meet the requirement, otherwise, broadband oscillation risks are judged to exist on frequencies corresponding to modes with the real part smaller than or equal to zero in the new energy station so as to optimize, therefore, real-time and on-site monitoring and control of broadband oscillation of the new energy station are achieved, broadband oscillation of a power system is restrained, equipment of the new energy station is protected, and practicality and timeliness are higher.
Optionally, in an embodiment of the present application, determining that the new energy station has a risk of broadband oscillation at a frequency corresponding to a mode with a real part less than or equal to zero, for optimization includes: calculating the equivalent admittance of modes of which the real part of the new energy unit group feeder line is smaller than or equal to zero; cutting off the feeder line with the minimum equivalent admittance real part in all new energy unit group feeder lines so as to collect bus broadband voltage phasor measurement data and new energy unit group feeder line broadband current phasor measurement data again.
It may be understood that in the embodiment of the present application, it may be considered that there is a risk of broadband oscillation on a frequency corresponding to a mode where the real part of each equivalent admittance is less than or equal to zero, calculating the equivalent admittance corresponding to each new energy unit group feeder line, for each mode where there is a risk of broadband oscillation, acquiring a feeder line with the minimum equivalent admittance real part in each new energy unit group feeder line corresponding to each mode, and cutting off the feeder line with the minimum equivalent admittance real part in each risk mode, so as to complete optimization, and performing broadband oscillation stability monitoring of the next round of new energy station
According to the embodiment of the application, the equivalent admittance of the mode that the real part of the new energy unit group feeder is smaller than or equal to zero can be calculated, and the feeder with the minimum equivalent admittance real part in all the new energy unit group feeders is cut off so as to collect bus broadband voltage phasor measurement data and new energy unit group feeder broadband current phasor measurement data again, so that the optimization of broadband oscillation of the new energy station is realized, and the safety of an electric power system is protected.
Specifically, in one embodiment of the present application, the calculation formula of the equivalent admittance of the mode with the real part less than or equal to zero is:
Figure BDA0004136806280000071
wherein Y is ip Is the equivalent admittance corresponding to the p-th mode of the new energy unit group feeder i,
Figure BDA0004136806280000072
broadband current phasors of new energy unit group feeder i corresponding to the p-th mode>
Figure BDA0004136806280000073
And the broadband voltage phasor of the bus corresponding to the p-th mode is obtained.
In the above formula, the mode p with the real part of the equivalent admittance less than or equal to zero can be used to obtain the equivalent admittance Y of each new energy unit group feeder line ip Obtaining the equivalent admittance real part Re (Y ip ) And (3) cutting off the minimum feeder line, wherein i=1, 2, …, m and m are the total number of new energy unit group feeder lines of the bus, and optimizing is completed after cutting off the minimum feeder line of the mode with each equivalent admittance real part smaller than or equal to zero, so that the broadband oscillation stability of the new energy station is considered to meet the requirement.
The working of the embodiments of the present application will be described in detail in the following.
Fig. 3 is a schematic structural diagram of a broadband oscillation in-situ monitoring controller for a new energy station according to an embodiment of the present application. The system comprises an input part, a judging part, a decision part and an output part, wherein the input part is used for inputting broadband phasor data of a new energy station bus and a new energy unit group feeder, the judging part is used for judging broadband oscillation stability of the station based on the broadband phasor data of the new energy station, the decision part is used for analyzing and optimizing the broadband oscillation problem of the station based on the broadband phasor data when judging that the station has the broadband oscillation problem, and the decision part is used for deciding the new energy unit group feeder which should be cut off and outputting a switch control signal to the new energy unit group feeder based on the broadband oscillation optimization result.
Fig. 4 is a schematic diagram of a process of in-situ monitoring and controlling broadband oscillation of a new energy station according to an embodiment of the present application, for implementing an operation process of the in-situ monitoring and controlling broadband oscillation of the new energy station.
Step S401: the broadband oscillation in-situ monitoring control device is installed in the new energy station.
Step S402: and collecting and inputting broadband voltage phasor measurement data of the bus and broadband current phasor measurement data of each new energy unit group feeder line.
Step S403: judging whether broadband oscillation stability of the new energy station meets requirements, calculating equivalent admittances corresponding to modes on the bus, and obtaining equivalent admittances Y corresponding to the kth mode on the bus k And judges whether the real part of each admittance is greater than zero. If yes, the equivalent admittances corresponding to the modes meet the conditions, and step S405 is executed to monitor the next period. If not, executing step S404 under the condition that the real part of admittance is not greater than zero in the equivalent admittance corresponding to each mode, and considering that the new energy station has a broadband oscillation risk on the frequency corresponding to the mode p, the broadband oscillation stability of the new energy station needs to be optimized.
Step S404: calculating the equivalent admittance corresponding to the p-th mode of each new energy unit group feeder line, and obtaining the equivalent admittance Y corresponding to the p-th mode of the new energy unit group feeder line i ip The real part Re (Y) ip ) And (4) outputting a cutting control signal to a switch output of the new energy unit group feeder line by the smallest feeder line, and continuously executing the step S402.
Step S405: the broadband oscillation stability of the new energy station is considered to meet the requirement, and the next period of monitoring is carried out, namely, the next broadband oscillation monitoring is carried out, and the second step is returned to.
According to the method for controlling the broadband oscillation of the new energy station in-situ monitoring, the broadband oscillation of the new energy station can be monitored and restrained in-situ based on the actual measurement data of the bus voltage of the new energy station and the feeder current of the new energy unit group, so that the stability condition of the broadband oscillation of the new energy station can be obtained in real time, and the stability condition can be optimized in time according to potential risks, so that the safety of an electric power system is maintained, the speed and the efficiency of the risk response of the new energy station are improved, and the method is more reliable. Therefore, the problems that in the related art, the combination mode of the substation and the main station cannot realize the timely optimization of the broadband oscillation of the new energy station, the wide area monitoring and the control of a new energy power system or a regional power grid are mainly oriented, the broadband oscillation is difficult to suppress in situ, the efficient real-time discovery and in situ solution of the security hole of the power system cannot be realized, the reliability and the practicability are insufficient and the like are solved.
Next, a description is given of a new energy station broadband oscillation in-situ monitoring control device according to an embodiment of the present application with reference to the accompanying drawings.
Fig. 5 is a schematic structural diagram of a broadband oscillation in-situ monitoring control device for a new energy station according to an embodiment of the present application.
As shown in fig. 5, the in-situ monitoring control device 10 for broadband oscillation of a new energy station includes: the device comprises an acquisition module 100, a judging module 200 and a control module 300.
The acquisition module 100 is used for acquiring broadband voltage phasor measurement data of a bus in the new energy station and broadband current phasor measurement data of a new energy unit group feeder.
The judging module 200 is configured to calculate an equivalent admittance corresponding to each mode on the bus according to the bus broadband voltage phasor measurement data and the new energy unit group feeder broadband current phasor measurement data, and judge whether the real part of the equivalent admittance corresponding to each mode is greater than zero.
And the control module 300 is used for judging that the broadband oscillation stability of the new energy station meets the requirement when the real part of the equivalent admittance corresponding to each mode is larger than zero, otherwise, judging that the broadband oscillation risk exists on the frequency corresponding to the mode of which the real part is smaller than or equal to zero for optimization.
Specifically, in one embodiment of the present application, the calculation formula of the equivalent admittance corresponding to each mode on the bus is:
Figure BDA0004136806280000081
wherein Y is k For the equivalent admittance corresponding to the kth mode on the bus,
Figure BDA0004136806280000082
broadband voltage phasors for bus corresponding to the kth mode,/->
Figure BDA0004136806280000083
The broadband current phasors of the new energy unit group feeder i are the total number of new energy unit group feeders of the bus, k=1.
Optionally, in one embodiment of the present application, the control module 300 includes: a calculation unit and a cutting unit.
The computing unit is used for computing the equivalent admittance of the mode of which the real part of the feeder line of each new energy unit group is smaller than or equal to zero.
The cutting unit is used for cutting off the feeder line with the minimum equivalent admittance real part in all new energy unit group feeder lines so as to collect the bus broadband voltage phasor measurement data and the new energy unit group feeder line broadband current phasor measurement data again.
Specifically, in one embodiment of the present application, the calculation formula of the equivalent admittance of the mode with the real part less than or equal to zero is:
Figure BDA0004136806280000091
wherein Y is ip Is the equivalent admittance corresponding to the p-th mode of the new energy unit group feeder i,
Figure BDA0004136806280000092
broadband current phasors of new energy unit group feeder i corresponding to the p-th mode>
Figure BDA0004136806280000093
And the broadband voltage phasor of the bus corresponding to the p-th mode is obtained.
It should be noted that the foregoing explanation of the embodiment of the method for controlling the in-situ monitoring of broadband oscillation of the new energy station is also applicable to the in-situ monitoring and controlling device of broadband oscillation of the new energy station in this embodiment, and will not be repeated here.
According to the on-site monitoring control device for the broadband oscillation of the new energy station, which is provided by the embodiment of the application, the broadband oscillation of the station can be monitored and restrained on site based on the actual measurement data of the bus voltage of the new energy station and the feeder current of the new energy unit group so as to acquire the stability condition of the broadband oscillation of the new energy station in real time and optimize the stability condition in time aiming at potential risks, so that the safety of an electric power system is maintained, the speed and the efficiency of the risk response of the new energy station are improved, and the on-site monitoring control device is more reliable. Therefore, the problems that in the related art, the combination mode of the substation and the main station cannot realize the timely optimization of the broadband oscillation of the new energy station, the wide area monitoring and the control of a new energy power system or a regional power grid are mainly oriented, the broadband oscillation is difficult to suppress in situ, the efficient real-time discovery and in situ solution of the security hole of the power system cannot be realized, the reliability and the practicability are insufficient and the like are solved.
Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device may include:
a memory 601, a processor 602, and a computer program stored on the memory 601 and executable on the processor 602.
The processor 602 implements the method for in-situ monitoring and controlling broadband oscillation of the new energy station provided in the above embodiment when executing the program.
Further, the electronic device further includes:
a communication interface 603 for communication between the memory 601 and the processor 602.
A memory 601 for storing a computer program executable on the processor 602.
The memory 601 may comprise a high-speed RAM memory or may further comprise a non-volatile memory (non-volatile memory), such as at least one disk memory.
If the memory 601, the processor 602, and the communication interface 603 are implemented independently, the communication interface 603, the memory 601, and the processor 602 may be connected to each other through a bus and perform communication with each other. The bus may be an industry standard architecture (Industry Standard Architecture, abbreviated ISA) bus, an external device interconnect (Peripheral Component, abbreviated PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, abbreviated EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 6, but not only one bus or one type of bus.
Alternatively, in a specific implementation, if the memory 601, the processor 602, and the communication interface 603 are integrated on a chip, the memory 601, the processor 602, and the communication interface 603 may perform communication with each other through internal interfaces.
The processor 602 may be a central processing unit (Central Processing Unit, abbreviated as CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, abbreviated as ASIC), or one or more integrated circuits configured to implement embodiments of the present application.
The present embodiment also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the new energy station broadband oscillation in-situ monitoring control method as above.
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 application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "N" is at least two, such as two, three, etc., unless explicitly defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or N wires, a portable computer cartridge (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. A new energy station broadband oscillation on-site monitoring control method is characterized by comprising the following steps:
collecting broadband voltage phasor measurement data of a bus in a new energy station and broadband current phasor measurement data of a new energy unit group feeder;
calculating equivalent admittances corresponding to all modes on a bus according to the bus broadband voltage phasor measurement data and the new energy unit group feeder broadband current phasor measurement data, and judging whether the real part of the equivalent admittance corresponding to all modes is larger than zero or not;
and if the real part of the equivalent admittance corresponding to each mode is larger than zero, judging that the broadband oscillation stability of the new energy station meets the requirement, otherwise, judging that the broadband oscillation risk exists on the frequency corresponding to the mode of which the real part is smaller than or equal to zero for optimization.
2. The method of claim 1, wherein the calculation formula of the equivalent admittance corresponding to each mode on the bus is:
Figure FDA0004136806270000011
wherein Y is k Corresponding to the kth mode on the busThe equivalent admittance of the material is that,
Figure FDA0004136806270000012
broadband voltage phasors for bus corresponding to the kth mode,/->
Figure FDA0004136806270000013
The broadband current phasors of the new energy unit group feeder i are given, m is the total number of new energy unit group feeders of the bus, k=1,, and n is the total number of modes of the bus.
3. The method according to claim 1, wherein said determining that the new energy station is at risk of broadband oscillation at a frequency corresponding to a modality with a real part less than or equal to zero for optimization comprises:
calculating the equivalent admittance of modes of which the real part of the new energy unit group feeder line is smaller than or equal to zero;
cutting off the feeder line with the minimum equivalent admittance real part in all new energy unit group feeder lines so as to re-acquire the bus broadband voltage phasor measurement data and the new energy unit group feeder line broadband current phasor measurement data.
4. A method according to claim 3, characterized in that the calculation formula of the equivalent admittance of the modes with the real part smaller than or equal to zero is:
Figure FDA0004136806270000014
wherein Y is ip Is the equivalent admittance corresponding to the p-th mode of the new energy unit group feeder i,
Figure FDA0004136806270000015
broadband current phasors of new energy unit group feeder i corresponding to the p-th mode>
Figure FDA0004136806270000016
And the broadband voltage phasor of the bus corresponding to the p-th mode is obtained.
5. A new energy station broadband oscillation on-site monitoring control device is characterized by comprising:
the acquisition module is used for acquiring broadband voltage phasor measurement data of a bus in the new energy station and broadband current phasor measurement data of a new energy unit group feeder;
the judging module is used for calculating the equivalent admittance corresponding to each mode on the bus according to the bus broadband voltage phasor measurement data and the new energy unit group feeder broadband current phasor measurement data, and judging whether the real part of the equivalent admittance corresponding to each mode is larger than zero or not;
and the control module is used for judging that the broadband oscillation stability of the new energy station meets the requirement when the real part of the equivalent admittance corresponding to each mode is larger than zero, otherwise, judging that the new energy station has broadband oscillation risk on the frequency corresponding to the mode with the real part smaller than or equal to zero so as to optimize.
6. The device of claim 5, wherein the calculation formula of the equivalent admittance corresponding to each mode on the bus is:
Figure FDA0004136806270000021
wherein Y is k For the equivalent admittance corresponding to the kth mode on the bus,
Figure FDA0004136806270000022
broadband voltage phasors for bus corresponding to the kth mode,/->
Figure FDA0004136806270000023
The broadband current phasors of the new energy unit group feeder i are the total number of new energy unit group feeders of the bus, k=1.
7. The apparatus of claim 5, wherein the control module comprises:
the computing unit is used for computing the equivalent admittance of the mode of which the real part of the new energy unit group feeder is smaller than or equal to zero;
the cutting unit is used for cutting off the feeder line with the minimum equivalent admittance real part in all new energy unit group feeder lines so as to re-acquire the bus broadband voltage phasor measurement data and the new energy unit group feeder line broadband current phasor measurement data.
8. The apparatus of claim 7, wherein the equation for the equivalent admittance of a mode with the real part less than or equal to zero is:
Figure FDA0004136806270000024
wherein Y is ip Is the equivalent admittance corresponding to the p-th mode of the new energy unit group feeder i,
Figure FDA0004136806270000025
broadband current phasors of new energy unit group feeder i corresponding to the p-th mode>
Figure FDA0004136806270000026
And the broadband voltage phasor of the bus corresponding to the p-th mode is obtained.
9. An electronic device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the new energy station broadband oscillation in-situ monitoring control method according to any one of claims 1-4.
10. A computer-readable storage medium having stored thereon a computer program, the program being executable by a processor for implementing the new energy station broadband oscillation in-situ monitoring control method according to any one of claims 1-4.
CN202310277317.9A 2023-03-20 2023-03-20 New energy station broadband oscillation on-site monitoring control method and device Pending CN116436030A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310277317.9A CN116436030A (en) 2023-03-20 2023-03-20 New energy station broadband oscillation on-site monitoring control method and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310277317.9A CN116436030A (en) 2023-03-20 2023-03-20 New energy station broadband oscillation on-site monitoring control method and device

Publications (1)

Publication Number Publication Date
CN116436030A true CN116436030A (en) 2023-07-14

Family

ID=87088195

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310277317.9A Pending CN116436030A (en) 2023-03-20 2023-03-20 New energy station broadband oscillation on-site monitoring control method and device

Country Status (1)

Country Link
CN (1) CN116436030A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117054746A (en) * 2023-09-27 2023-11-14 中国电力科学研究院有限公司 Impedance synchronous measurement system and method for new energy field

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117054746A (en) * 2023-09-27 2023-11-14 中国电力科学研究院有限公司 Impedance synchronous measurement system and method for new energy field

Similar Documents

Publication Publication Date Title
KR101331325B1 (en) Device for calculating impedances of battery cell and battery impedance measuring system
JP7249431B2 (en) Detection method, device, electronic device and storage medium for power consumption behavior
CN110988724B (en) Method, system, medium, and electronic device for detecting insulation failure of battery cluster
CN116436030A (en) New energy station broadband oscillation on-site monitoring control method and device
CN109450089B (en) Transformer area low voltage identification method and device and terminal equipment
CN109298289A (en) Localization method, system and the electronic equipment of distribution network failure point
CN114511147A (en) Line loss monitoring and early warning method, device, equipment and storage medium
CN112330488A (en) Power grid frequency situation prediction method based on transfer learning
CN108072858B (en) Electric energy meter quality management method and system and terminal equipment
CN102156260B (en) System and method for evaluating status of oscillation circuit of active high-voltage direct-current switch
EP3020119B1 (en) Method of determining a condition of an electrical power network and apparatus therefor
CN103999316A (en) Method for generating a signal indicating an oscillation in an electrical energy supply network
CN219535641U (en) New energy station broadband oscillation on-site monitoring control device
CN113241853A (en) Intelligent diagnosis and early warning method and system for capacitance current of transformer substation
CN115065591B (en) Electric vehicle charging pile fault early warning system and method based on state space model
CN116470525A (en) Broadband oscillation telecontrol monitoring control method and device for new energy power transmission system
CN115356542A (en) Method and device for detecting screw connection condition of high-voltage bus in battery pack
CN115248906A (en) State error identification method and system for double current transformers on outgoing line of generator
CN210243820U (en) Gateway electric energy metering device on-line monitoring system for branch routing inspection
CN211263669U (en) Edge computing system for power distribution network fault detection and positioning
CN219760647U (en) Broadband oscillation telecontrol monitoring control device for new energy power transmission system
CN112348074B (en) Power distribution network power failure event accurate diagnosis method, device and system based on data driving
CN110018437B (en) Gateway electric energy metering device online monitoring method and system for shunt inspection
CN113092951B (en) Offshore wind farm complex topology line fault information prediction method and device
JPWO2019111292A1 (en) POWER CONDITIONER SYSTEM, POWER SYSTEM WITH THE SAME, AND ACCIDENT POINT LOCATION METHOD

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination