CN117630794A - Comprehensive error misalignment alarming method and device for wide-area high-voltage electric energy metering device - Google Patents
Comprehensive error misalignment alarming method and device for wide-area high-voltage electric energy metering device Download PDFInfo
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Abstract
The invention discloses a comprehensive error misalignment alarming method and device for a wide-area high-voltage electric energy metering device. The method comprises the following steps: constructing a connection relation between power plants/substations in a preset area according to topology relation data of the power system in the area to form a topology graph; dividing a topological graph into a plurality of monitoring domains according to different connection relations, and determining a reference station of each monitoring domain; calculating the running error of each transformer substation in each monitoring domain and the relative error between adjacent transformer substations; and respectively calculating an error misalignment alarm result of each transformer substation according to the operation error and the relative error.
Description
Technical Field
The invention relates to the technical field of electric energy metering devices, in particular to a comprehensive error misalignment alarming method and device for a wide-area high-voltage electric energy metering device.
Background
The high-voltage electric energy metering device consists of a high-voltage gateway transformer and an electric energy meter, can sense electric network core electric parameters such as voltage, current and the like, and relates to multiple links such as electric energy metering, measuring and the like, and the measuring data is the direct basis of electric energy trade settlement and electric carbon trade.
The high-voltage electric energy metering device under the existing novel electric power system has stronger topological relevance, is easily influenced by the running state of the opposite side station with topological relevance, the existing misalignment alarm method is only limited to data in a transformer substation, and the error misalignment alarm algorithm is single in direction and has not formed large-scale wide-area application yet. Therefore, research on a method for warning the overall operation error of the wide-area high-voltage electric energy metering device based on a wide-area-level substation network architecture is needed to be carried out, the condition limitation in a single transformer substation is eliminated, the data dimension and the data volume are greatly improved, and the warning for the operation error of the wide-area high-voltage electric energy metering device is realized.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a comprehensive error misalignment alarming method and device for a wide-area high-voltage electric energy metering device.
According to one aspect of the invention, there is provided a comprehensive error misalignment warning method for a wide-area high-voltage electric energy metering device, comprising:
constructing a connection relation between power plants/substations in a preset area according to topology relation data of the power system in the area to form a topology graph;
dividing a topological graph into a plurality of monitoring domains according to different connection relations, and determining a reference station of each monitoring domain;
calculating the running error of each transformer substation in each monitoring domain and the relative error between adjacent transformer substations;
and respectively calculating an error misalignment alarm result of each transformer substation according to the operation error and the relative error.
Optionally, dividing the topology map into a plurality of monitoring domains according to different connection relationships includes:
dividing each power station/substation with a direct connection relationship in the topological graph together to determine a plurality of monitoring domains, wherein the monitoring domains are double-end non-branch areas, and boundary nodes at two ends of the monitoring domains are a transformer and an ammeter.
Optionally, calculating the operation error of each substation in each monitoring domain includes:
the current data of the transformer substation collected at the previous moment is used as a standard value, and the current relative change rate of the current data collected at the next moment is calculated in sequence;
the voltage data of the voltage variation power acquired at the previous moment is taken as a standard value, and the voltage relative change rate of the voltage data acquired at the next moment is calculated in sequence;
and determining the operation error of each transformer substation according to the relative current change rate and the relative voltage change rate at each moment.
Optionally, calculating a relative error between adjacent transformer stations within each monitoring domain includes:
respectively calculating current deviation and voltage deviation between each reference station in the monitoring domain and a transformer substation connected with the reference station;
and determining the relative error between each reference station and the transformer substation connected with the reference station according to the current deviation and the voltage deviation between each reference station and the transformer substation connected with the reference station.
Optionally, the calculation formula of the error misalignment warning result is:
in the method, in the process of the invention, to monitor the operation errors of the substations 2, 3, 4, 5, 6 in the domain, Δε T(4-2) 、Δε T(4-3) 、Δε T(4-5) 、Δε T(4-6) To monitor the relative error between the intra-domain reference station 4 and the substations 2, 3, 5, 6 to which it is connected.
Optionally, the method further comprises:
determining whether the reference stations in each monitoring domain are in error misalignment according to the error misalignment alarm result and a preset alarm threshold;
and under the condition that the misalignment alarm result of the reference station in the monitoring domain is larger than the alarm threshold, judging that the error of the reference station is misaligned, and carrying out alarm processing on the reference station.
According to another aspect of the present invention, there is provided a wide-area high-voltage electric energy metering device integrated error misalignment warning apparatus, comprising:
the construction module is used for constructing the connection relation between power plants/substations in a preset area according to the topological relation data of the power system in the area to form a topological graph;
the dividing module is used for dividing the topological graph into a plurality of monitoring domains according to different connection relations and determining a reference station of each monitoring domain;
the first calculation module is used for calculating the running errors of each transformer substation in each monitoring domain and the relative errors between adjacent transformer substations;
and the second calculation module is used for calculating the error misalignment alarm result of each transformer substation according to the operation error and the relative error.
According to a further aspect of the present invention there is provided a computer readable storage medium storing a computer program for performing the method according to any one of the above aspects of the present invention.
According to still another aspect of the present invention, there is provided an electronic device including: a processor; a memory for storing the processor-executable instructions; the processor is configured to read the executable instructions from the memory and execute the instructions to implement the method according to any of the above aspects of the present invention.
Therefore, the application provides a comprehensive error misalignment alarming method for a wide-area high-voltage electric energy metering device, which is used for dividing monitoring domains based on a constructed topological graph, calculating errors in each monitoring domain, and outputting information based on running high-voltage electric energy metering devices among wide-area stations of a plurality of substations which are monitored and collected on line by the existing electric energy metering devices in the substations without additionally installing a monitoring device. And judging whether the parameters accord with a known rule or not by combining a data analysis method, establishing a measurement error misalignment alarm judgment standard, and alarming whether the error of the high-voltage electric energy measurement device running between the wide-area stations is abnormal or not. The method gets rid of the condition limitation in a single transformer substation, greatly improves the data dimension and the data volume, and solves the problems that the existing wide-area high-voltage electric energy metering device is weak in data base, limited in application scene, incapable of realizing the error misalignment alarming technology of the full-type high-voltage electric energy metering device and the like. .
Drawings
Exemplary embodiments of the present invention may be more completely understood in consideration of the following drawings:
FIG. 1 is a schematic flow chart of a comprehensive error misalignment warning method for a wide-area high-voltage electric energy metering device according to an exemplary embodiment of the present invention;
FIG. 2 is a schematic diagram of a scheme for comprehensive error misalignment warning for a wide-area high-voltage electric energy metering device according to an exemplary embodiment of the present invention;
FIG. 3 is a schematic diagram of a wide area substation topology group according to an exemplary embodiment of the present invention;
FIGS. 4a, 4b, 4c and 4d are schematic diagrams of monitoring domain partitioning according to an exemplary embodiment of the present invention;
FIG. 5 is a schematic diagram of the error calculation of the monitoring domain 3 of FIG. 4c according to an exemplary embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a comparison of data relative changes within a substation according to an exemplary embodiment of the present invention;
FIG. 7 is a schematic diagram of a decision-making layer fusion processing scheme for online monitoring of a wide-area high-voltage electric energy metering device according to an exemplary embodiment of the present invention;
FIG. 8 is a schematic diagram of a wide-area high-voltage power metering device with integrated error misalignment warning apparatus according to an exemplary embodiment of the present invention;
fig. 9 is a structure of an electronic device provided in an exemplary embodiment of the present invention.
Detailed Description
Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some embodiments of the present invention and not all embodiments of the present invention, and it should be understood that the present invention is not limited by the example embodiments described herein.
It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
It will be appreciated by those of skill in the art that the terms "first," "second," etc. in embodiments of the present invention are used merely to distinguish between different steps, devices or modules, etc., and do not represent any particular technical meaning nor necessarily logical order between them.
It should also be understood that in embodiments of the present invention, "plurality" may refer to two or more, and "at least one" may refer to one, two or more.
It should also be appreciated that any component, data, or structure referred to in an embodiment of the invention may be generally understood as one or more without explicit limitation or the contrary in the context.
In addition, the term "and/or" in the present invention is merely an association relationship describing the association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present invention, the character "/" generally indicates that the front and rear related objects are an or relationship.
It should also be understood that the description of the embodiments of the present invention emphasizes the differences between the embodiments, and that the same or similar features may be referred to each other, and for brevity, will not be described in detail.
Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Embodiments of the invention are operational with numerous other general purpose or special purpose computing system environments or configurations with electronic devices, such as terminal devices, computer systems, servers, etc. Examples of well known terminal devices, computing systems, environments, and/or configurations that may be suitable for use with the terminal device, computer system, server, or other electronic device include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, hand-held or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network personal computers, small computer systems, mainframe computer systems, and distributed cloud computing technology environments that include any of the foregoing, and the like.
Electronic devices such as terminal devices, computer systems, servers, etc. may be described in the general context of computer system-executable instructions, such as program modules, being executed by a computer system. Generally, program modules may include routines, programs, objects, components, logic, data structures, etc., that perform particular tasks or implement particular abstract data types. The computer system/server may be implemented in a distributed cloud computing environment in which tasks are performed by remote processing devices that are linked through a communications network. In a distributed cloud computing environment, program modules may be located in both local and remote computing system storage media including memory storage devices.
Exemplary method
Fig. 1 is a schematic flow chart of a comprehensive error misalignment warning method of a wide-area high-voltage electric energy metering device according to an exemplary embodiment of the invention. The embodiment can be applied to an electronic device, as shown in fig. 1, and the comprehensive error misalignment warning method 100 of the wide-area high-voltage electric energy metering device includes the following steps:
step 101, constructing a connection relation between power plants/substations in a preset area according to topology relation data of a power system in the area to form a topology graph;
102, dividing a topological graph into a plurality of monitoring domains according to different connection relations, and determining a reference station of each monitoring domain;
step 103, calculating the running error of each transformer substation in each monitoring domain and the relative error between adjacent transformer substations;
and 104, respectively calculating error misalignment alarm results of each transformer substation according to the operation errors and the relative errors.
Specifically, referring to fig. 2, the high-voltage electric energy metering device is operated between wide area stations of a plurality of substations with direct line connection relationship to perform metering error on-line monitoring and error misalignment warning. The comprehensive error misalignment warning method for the wide-area high-voltage electric energy metering device specifically comprises the following steps:
s1: and constructing a wide-area substation topology group. And constructing a connection relation between power plants/substations in the area according to the system topology relation data in the area to form a topology graph.
S2: the monitoring domain is divided and the reference station is determined. According to different connection relations, a topological diagram of a power plant/transformer substation is divided into a plurality of monitoring domains, reference stations in the domains are determined, and data acquired by using a gateway electric energy meter are used for respectively calculating the relative changes of voltage and current signals in each transformer substation station and the relative deviation between stations relative to the reference stations.
S3: an error misalignment warning method of a wide-area high-voltage electric energy metering device based on electric energy metering data comprises a wide-area inter-station calculation model and an intra-station calculation model. The inter-station calculation model realizes the positioning of the wide-area out-of-tolerance transformer substation; and the in-station calculation model realizes the error misalignment warning of the in-station high-voltage electric energy metering device.
The method comprises the following specific steps:
step 1: and (3) establishing a calculation model between wide-area stations, calculating voltage and current error analysis of two system group electric energy metering devices between transformer stations with direct relation in a monitoring area, and positioning the out-of-tolerance transformer stations.
Step 2: an in-station calculation model is built, the running errors of all electric energy metering devices in the out-of-tolerance transformer substation are calculated, and the error misalignment warning of the in-station high-voltage electric energy metering devices is realized;
step 3: dividing a monitoring domain aiming at a wide-area substation topology group; repeatedly calling a wide-area inter-station calculation model aiming at each monitoring domain, and continuously excavating until a transformer station with abnormal inter-station error is found; and (5) combining the metering state analysis result of the electric energy metering device of the in-station calculation model to complete the online monitoring and misalignment warning of the wide-area-level electric energy metering device.
And the analysis results of the operation errors of the electric energy metering devices in the transformer substations with the direct connection are combined, and the optimization decision of the misalignment alarm of the wide-area high-voltage electric energy metering devices is made pertinently by combining the analysis results of the monitoring transformer substations and the related transformer substation grid topological relation and the error analysis results of the electric energy metering devices on the shared transmission lines of the two transformer substations with the direct connection.
S1, constructing a wide-area substation topology group, which comprises the following steps:
the construction of a station topological graph in a certain area is the basis of division calculation of each substation, and a plurality of substations/power stations with direct line connection relations form a wide-area substation topological group of the whole system. To facilitate subsequent internalIntroduction of the capacitor, a constructed wide area substation topology group is shown in fig. 3. G0 is a power plant, T1-T10 are all substations, and after different power plants/substations in the power system are connected through a transmission line, the change of voltage and current at two ends of the line shows strong correlation. Obviously, the voltage and the current between the transformer stations have deviation delta epsilon T(i-j) Is the relative deviation of the voltage and current between the i-th and j-th substations.
Specifically, the "dividing the monitoring domain and determining the reference station" in S2 includes:
in order to fully utilize the inter-station electric parameter linkage coupling relation of the tightly connected transformer substation and combine the topological relation of the transformer substation net rack (the ring network with the same voltage level, the analysis model of the ladder network with different voltage levels and the like), the wide area transformer substation topological group is divided into a plurality of monitoring domains. The monitoring domain is divided, and the stations with direct connection relation should be divided together preferentially. Based on the above-described division principle, the wide-Area-level substation topology group of fig. 3 is divided into a plurality of double-ended non-branching regions, which are called Monitoring Areas (MA). The substations at the two ends of the transmission line are respectively provided with an electric energy metering device, so that all the electric energy metering data in the monitoring domain are considerable under the condition of normal operation. As shown in the monitoring domain 1 in fig. 4a, the monitoring domain 2 in fig. 4b, the monitoring domain 3 in fig. 4c and the monitoring domain 4 in fig. 4d, the topology map of the wide area level system of fig. 3 is divided into 4 groups of monitoring domains, and the red transformer substation is the reference station.
Specifically, the "wide-area inter-station calculation model" and "intra-station calculation model" described in S3 include:
taking monitoring domain 3 in fig. 4 as an example:
the wide-area inter-station calculation model calculates the voltage delta epsilon between any two connected substations x and y in the monitoring domain 3 uT(x-y) Current error delta epsilon iT(x-y) For example, deltaε T ( 4-5 ) Representing voltage and current errors between a transformer substation T4 and a transformer substation T5, and realizing the positioning of the out-of-tolerance transformer substation in a monitoring domain 3 by a wide-area inter-station calculation model;
the in-station calculation model calculates the voltage relative change rate of each transformer substation in the monitoring domain 3Relative rate of change of current->For example->The relative amounts of change in the voltage and current of the transformer substation T5 at time t+1 and time T are shown in fig. 5. The in-station calculation model realizes the error misalignment warning of the in-station metering device.
Specifically, the "wide-area inter-station calculation model calculates voltage and current errors" between any two connected substations in the monitoring domain 3:
as in fig. 5, monitor T of domain 3 5 The transformer substation is a reference station, and the calculation and T are as follows 5 With relative error of the substations in connection, e.g. T 4 Substation and T 5 The voltage of the transformer substation is U 4 And U 5 The current is I 4 And I 5 The amplitude deviation of the voltage and the current between the two substations is calculated as follows:
specifically, the "in-station calculation model calculates the relative change rate of the voltage and the current of each substation in the monitoring domain 3":
to compare whether the relative changes of the voltage and current in each station are consistent, a previous time t i The acquired data is taken as a standard value, and the next time t is calculated in sequence i+1 The relative rate of change of the acquired data. As in fig. 5, monitor T of domain 3 5 Substation, t i The time voltage and current acquisition data aret i+1 The time voltage acquisition data is +.>Then T is 5 The formula of the relative change rate of the voltage and the current of the transformer substation is calculated as follows:
the same method can calculate the voltage and the current t in other substations i+1 Time and t i Relative rate of change of time of day.
Implementation case:
the voltage and the current in the transformer substation are in a fluctuation state in real time, the relative change of the current collected voltage and the current of a certain transformer substation relative to the data of the previous collection time is calculated according to formulas (1) and (2), the change rates of the transformer substations with connection relations in the monitoring domain are compared, as shown in fig. 5, the relative change amounts of the voltage and the current data of the four transformer substations are transversely compared, and the T is used for 5 The transformer station is used as a reference, and if at the same time, a certain station and T 5 The deviation of the relative change rate of the station voltage and the current exceeds a set threshold, namely the measurement abnormality is identified. For example, as can be seen from fig. 6, the voltage of the T4 substation rises by 5.2%, the current drops by 1.3%, and the abnormality is obvious from other substations.
Specifically, the decision model of the error misalignment alarm in S4 includes:
the specific idea is shown in fig. 7: and establishing fusion connection between the error monitoring results of the calculation model between the wide-area stations and the calculation model in the stations, and carrying out optimization decision on the evaluation results obtained by different analysis methods, so that the decision accuracy of online monitoring of the wide-area high-voltage electric energy metering device is improved to a certain extent.
Taking the monitoring domain 2 in fig. 4 as an example, the substation 4 is a hub substation, and the hub substation and the substations 2, 3, 5 and 6 are mutually in direct connection relation.
(1) First, call a wide areaCalculating voltage and current errors between any two connected substations by using an inter-station calculation model, wherein the calculation results are delta epsilon respectively T(4-2) 、Δε T(4-3) 、Δε T(4-5) 、Δε T(4-6) 。
(2) Then, calling an in-station calculation model to calculate the relative change rates of the voltages and currents of the substations 2, 3, 4, 5 and 6 in the station,
(3) Taking the substation 4 as an example, taking the intra-station error monitoring result and the inter-wide-area station error analysis result with direct relation into consideration, the decision model of the error misalignment alarm is expressed as follows:
where T refers to a time-varying plant, and where only T by default means that both voltage u and current i are contained, corresponds to a set of data containing u and i. If the error is larger than the set threshold value, the error is considered as the error misalignment, and the alarm is timely made.
Therefore, the output information of the high-voltage electric energy metering device is operated among wide area stations of a plurality of substations based on the on-line monitoring and acquisition of the existing electric energy metering devices in the substations, and additional installation of monitoring devices is not needed. And judging whether the parameters accord with a known rule or not by combining a data analysis method, establishing a measurement error misalignment alarm judgment standard, and alarming whether the error of the high-voltage electric energy measurement device running between the wide-area stations is abnormal or not. The method gets rid of the condition limitation in a single transformer substation, greatly improves the data dimension and the data volume, and solves the problems that the existing wide-area high-voltage electric energy metering device is weak in data base, limited in application scene, incapable of realizing the error misalignment alarming technology of the full-type high-voltage electric energy metering device and the like.
Exemplary apparatus
Fig. 8 is a schematic structural diagram of a comprehensive error misalignment warning device of a wide-area high-voltage electric energy metering device according to an exemplary embodiment of the present invention. As shown in fig. 8, the apparatus 800 includes:
the construction module 810 is configured to construct a connection relationship between power plants/substations in a predetermined area according to topology relationship data of the power system in the area, so as to form a topology graph;
the dividing module 820 is configured to divide the topology map into a plurality of monitoring domains according to different connection relationships, and determine a reference station of each monitoring domain;
the first calculating module 830 is configured to calculate an operation error of each substation in each monitoring domain and a relative error between adjacent substations;
the second calculation module 840 is configured to calculate an error misalignment alarm result of each substation according to the operation error and the relative error.
Optionally, the partitioning module 820 includes:
and the dividing sub-module is used for dividing each power station/substation with a direct connection relationship in the topological graph together to determine a plurality of monitoring domains, wherein the monitoring domains are double-end non-branch areas, and boundary nodes at two ends of the monitoring domains are a transformer and an ammeter.
Optionally, the first calculation module 830 calculates an operation error of each substation in each monitoring domain, including:
the first calculation sub-module is used for sequentially calculating the current relative change rate of the current data acquired at the next moment by taking the current data of the transformer substation acquired at the previous moment as a standard value;
the second calculation sub-module is used for sequentially calculating the voltage relative change rate of the voltage data acquired at the next moment by taking the voltage data of the voltage change acquired at the previous moment as a standard value;
and the first determining submodule is used for determining the operation error of each transformer substation according to the relative change rate of the current and the relative change rate of the voltage at each moment.
Optionally, in the first computing module 830, it includes:
the third calculation sub-module is used for calculating the current deviation and the voltage deviation between the reference station in each monitoring domain and the transformer substation connected with the reference station;
and the second determining submodule is used for determining the relative error between each reference station and the transformer substation connected with the reference station according to the current deviation and the voltage deviation between each reference station and the transformer substation connected with the reference station.
Optionally, the calculation formula of the error misalignment warning result is:
in the method, in the process of the invention, to monitor the operation errors of the substations 2, 3, 4, 5, 6 in the domain, Δε T(4-2) 、Δε T(4-3) 、Δε T(4-5) 、Δε T(4-6) To monitor the relative error between the intra-domain reference station 4 and the substations 2, 3, 5, 6 to which it is connected.
Optionally, the apparatus 800 further comprises:
the determining module is used for determining whether the reference stations in each monitoring domain are in error misalignment according to the error misalignment alarm result and a preset alarm threshold value;
and the alarm module is used for judging the error misalignment of the reference station and carrying out alarm processing on the reference station under the condition that the misalignment alarm result of the reference station in the monitoring domain is larger than the alarm threshold value.
Exemplary electronic device
Fig. 9 is a structure of an electronic device provided in an exemplary embodiment of the present invention. As shown in fig. 9, the electronic device 90 includes one or more processors 91 and memory 92.
The processor 91 may be a Central Processing Unit (CPU) or other form of processing unit having data processing and/or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.
Memory 92 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, random Access Memory (RAM) and/or cache memory (cache), and the like. The non-volatile memory may include, for example, read Only Memory (ROM), hard disk, flash memory, and the like. One or more computer program instructions may be stored on the computer readable storage medium that may be executed by the processor 91 to implement the methods of the software programs of the various embodiments of the present invention described above and/or other desired functions. In one example, the electronic device may further include: an input device 93 and an output device 94, which are interconnected by a bus system and/or other form of connection mechanism (not shown).
In addition, the input device 93 may also include, for example, a keyboard, a mouse, and the like.
The output device 94 can output various information to the outside. The output device 94 may include, for example, a display, speakers, a printer, and a communication network and remote output devices connected thereto, etc.
Of course, only some of the components of the electronic device relevant to the present invention are shown in fig. 9 for simplicity, components such as buses, input/output interfaces, etc. being omitted. In addition, the electronic device may include any other suitable components depending on the particular application.
Exemplary computer program product and computer readable storage Medium
In addition to the methods and apparatus described above, embodiments of the invention may also be a computer program product comprising computer program instructions which, when executed by a processor, cause the processor to perform steps in a method according to various embodiments of the invention described in the "exemplary methods" section of this specification.
The computer program product may write program code for performing operations of embodiments of the present invention in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server.
Furthermore, embodiments of the invention may also be a computer-readable storage medium, having stored thereon computer program instructions, which when executed by a processor, cause the processor to perform steps in a method according to various embodiments of the invention described in the "exemplary method" section of the description above.
The computer readable storage medium may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The basic principles of the present invention have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present invention are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be considered as essential to the various embodiments of the present invention. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the invention is not necessarily limited to practice with the above described specific details.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different manner from other embodiments, so that the same or similar parts between the embodiments are mutually referred to. For system embodiments, the description is relatively simple as it essentially corresponds to method embodiments, and reference should be made to the description of method embodiments for relevant points.
The block diagrams of the devices, systems, apparatuses, systems according to the present invention are merely illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, systems, apparatuses, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.
The method and system of the present invention may be implemented in a number of ways. For example, the methods and systems of the present invention may be implemented by software, hardware, firmware, or any combination of software, hardware, firmware. The above-described sequence of steps for the method is for illustration only, and the steps of the method of the present invention are not limited to the sequence specifically described above unless specifically stated otherwise. Furthermore, in some embodiments, the present invention may also be embodied as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present invention. Thus, the present invention also covers a recording medium storing a program for executing the method according to the present invention.
It is also noted that in the systems, devices and methods of the present invention, components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present invention. The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the invention to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.
Claims (9)
1. The comprehensive error misalignment warning method for the wide-area high-voltage electric energy metering device is characterized by comprising the following steps of:
constructing a connection relation between power plants/substations in a preset area according to topology relation data of the power system in the area to form a topology graph;
dividing the topological graph into a plurality of monitoring domains according to different connection relations, and determining a reference station of each monitoring domain;
calculating the running error of each transformer substation in each monitoring domain and the relative error between adjacent transformer substations;
and respectively calculating error misalignment alarm results of each transformer substation according to the operation errors and the relative errors.
2. The method of claim 1, wherein dividing the topology map into a plurality of monitoring domains according to different connection relationships comprises:
dividing each power station/substation with a direct connection relationship in the topological graph together to determine a plurality of monitoring domains, wherein the monitoring domains are double-end non-branch areas, and boundary nodes at two ends of the monitoring domains are a transformer and an ammeter.
3. The method of claim 1, wherein calculating the operating error of the substations themselves within each monitoring domain comprises:
the current data of the transformer substation collected at the previous moment is used as a standard value, and the current relative change rate of the current data collected at the next moment is calculated in sequence;
the voltage data of the voltage variation power acquired at the previous moment is taken as a standard value, and the voltage relative change rate of the voltage data acquired at the next moment is calculated in sequence;
and determining the operation error of each transformer substation according to the relative current change rate and the relative voltage change rate at each moment.
4. A method according to claim 3, wherein calculating the relative error between adjacent transformer stations within each monitoring domain comprises:
respectively calculating current deviation and voltage deviation between each reference station in the monitoring domain and a transformer substation connected with the reference station;
and determining the relative error between each reference station and the transformer substation connected with the reference station according to the current deviation and the voltage deviation between each reference station and the transformer substation connected with the reference station.
5. The method of claim 4, wherein the error misalignment warning result is calculated by the formula:
in the method, in the process of the invention, to monitor the operation errors of the substations 2, 3, 4, 5, 6 in the domain, Δε T(4-2) 、Δε T(4-3) 、Δε T(4-5) 、Δε T(4-6) To monitor the relative error between the intra-domain reference station 4 and the substations 2, 3, 5, 6 to which it is connected.
6. The method as recited in claim 1, further comprising:
determining whether the reference stations in each monitoring domain are in error misalignment according to the error misalignment alarm result and a preset alarm threshold;
and under the condition that the misalignment alarm result of the reference station in the monitoring domain is larger than the alarm threshold value, judging that the error of the reference station is misaligned, and carrying out alarm processing on the reference station.
7. The utility model provides a wide area high-voltage electric energy metering device integrated error misalignment alarm device which characterized in that includes:
the construction module is used for constructing the connection relation between power plants/substations in a preset area according to the topological relation data of the power system in the area to form a topological graph;
the dividing module is used for dividing the topological graph into a plurality of monitoring domains according to different connection relations and determining a reference station of each monitoring domain;
the first calculation module is used for calculating the running errors of each transformer substation in each monitoring domain and the relative errors between adjacent transformer substations;
and the second calculation module is used for calculating the error misalignment alarm result of each transformer substation according to the operation error and the relative error.
8. A computer readable storage medium, characterized in that the storage medium stores a computer program for executing the method of any of the preceding claims 1-6.
9. An electronic device, the electronic device comprising:
a processor;
a memory for storing the processor-executable instructions;
the processor is configured to read the executable instructions from the memory and execute the instructions to implement the method of any of the preceding claims 1-6.
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