CN114614509A - Analysis method for influence of photovoltaic access on electric energy quality and related device - Google Patents
Analysis method for influence of photovoltaic access on electric energy quality and related device Download PDFInfo
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- CN114614509A CN114614509A CN202210427905.1A CN202210427905A CN114614509A CN 114614509 A CN114614509 A CN 114614509A CN 202210427905 A CN202210427905 A CN 202210427905A CN 114614509 A CN114614509 A CN 114614509A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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Abstract
The application discloses a method for analyzing the influence of photovoltaic access on electric energy quality and a related device, wherein the method comprises the following steps: firstly, the information of a marketing database, the information of a metering database and the information of a production database are associated and interacted at regular intervals, so that data synchronization is realized; then, photovoltaic users with poor voltage quality caused by photovoltaic access, photovoltaic users with poor power factor caused by photovoltaic access and photovoltaic users with unbalanced distribution transformer three phases caused by photovoltaic access are screened from meter code information; and finally, generating a report and a list of the electric energy quality failing to meet the public distribution transformer due to distributed access according to photovoltaic users. Compared with the prior art, the method and the device have the advantages that multidimensional analysis of voltage quality failure, power factor failure and three-phase imbalance caused by distributed photovoltaic access is realized, and the technical problem that the prior art cannot comprehensively and deeply analyze the reason for the failure of the power quality of the public distribution transformer is solved.
Description
Technical Field
The application relates to the technical field of electric power, in particular to an analysis method and a related device for influence of photovoltaic access on electric energy quality.
Background
Due to the fact that the distributed photovoltaic is continuously connected into the power grid, certain influence can be generated on the power quality of the 10kV public distribution transformer of the power distribution network. At present, the quality analysis of the stored public distribution transformer electric energy is mainly divided into the problems of voltage quality, power factors, three-phase imbalance and the like, and the technical deep correlation analysis is not carried out on the quality problem of the public distribution transformer electric energy caused by the access of low-voltage industry or low-voltage resident distributed photovoltaic, so that whether the quality of the distributed transformer electric energy is poor or not caused by the distributed photovoltaic cannot be verified.
The existing technical method can detect the simple problem of the power quality of the 10kV public distribution transformer, but an effective method for judging whether the power quality of the 10kV public distribution transformer caused by distributed photovoltaic access has a problem is still lacked, so that the existing technology cannot comprehensively and deeply analyze the reasons that the power quality of all public distribution transformers fails.
Disclosure of Invention
The application provides an analysis method and a related device for influence of photovoltaic access on power quality, and aims to solve the technical problem that the prior art cannot comprehensively and deeply analyze the reason that the power quality of a public distribution transformer is not qualified.
In view of the above, a first aspect of the present application provides a method for analyzing an influence of photovoltaic access on power quality, where the method includes:
the marketing database information, the metering database information and the production database information are associated and interacted at regular intervals, so that data synchronization is realized;
screening voltage data which are not in a preset voltage range from the meter code information, acquiring a corresponding first distribution transformer ID, calculating the total photovoltaic capacity contained in the first distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with poor voltage quality caused by photovoltaic access;
screening out power factors which are not in a preset power factor range from the meter code information, acquiring a corresponding second distribution transformer ID, calculating the total photovoltaic capacity contained in the second distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with power factors failing due to photovoltaic access;
screening meter code information of which the three-phase unbalance degree is greater than a preset threshold value from the meter code information, acquiring a corresponding third distribution transformer ID, calculating the total photovoltaic capacity contained in the third distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with unbalanced three phases of distribution transformers due to photovoltaic access;
and generating a report and a list of the electric energy quality of the public distribution transformer failing due to distributed access according to the photovoltaic users.
Optionally, the regularly associating and interacting marketing database information, metering database information, and production database information to achieve data synchronization specifically includes:
taking marketing database information as reference bottom data and distribution transformer ID as a correlation field, regularly carrying out first matching on the marketing database information and the metering database information, and carrying out second matching on data which cannot be matched by using a meter code number;
and taking the production database information as reference bottom data and the distribution transformer ID as a correlation field, regularly performing first matching on the measurement database information and the production database information, and performing second matching on data which cannot be matched by using a line name or a distribution transformer name.
Optionally, the step of screening out voltage data that is not within a preset voltage range from the meter code information and acquiring a corresponding first distribution transformer ID, calculating a total photovoltaic capacity contained in the first distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain a photovoltaic user with a photovoltaic access that causes a voltage quality failure specifically includes:
screening voltage data which are not in a preset voltage range from the meter code information and defining the voltage data as voltage quality failing;
and obtaining distribution transformer capacity, distribution transformer ID and reporting capacity through reverse correlation of the table code information of the voltage quality failure, superposing the reporting capacity to obtain the distributed photovoltaic total capacity accessed by the public distribution transformer, and obtaining the photovoltaic users with the voltage quality failure caused by the photovoltaic access according to the relation between the photovoltaic total capacity and the distribution transformer capacity.
Optionally, the step of screening out a power factor out of a preset power factor range from the meter code information and acquiring a corresponding second distribution transformer ID, the step of calculating a photovoltaic total capacity included in the second distribution transformer ID, and the step of obtaining a photovoltaic user with a power factor failing due to photovoltaic access according to analysis of the photovoltaic total capacity specifically includes the steps of:
screening out a power factor out of a preset power factor range from the meter code information and defining the power factor as a power factor failing grid;
and obtaining distribution transformer capacity, distribution transformer ID and reporting capacity through reverse correlation of the table code information of the power factor failing grid, superposing the reporting capacity to obtain the photovoltaic total capacity of the public distribution transformer access distribution type, and obtaining the photovoltaic users of the power factor failing grid caused by the photovoltaic access according to the relation between the photovoltaic total capacity and the distribution transformer capacity.
Optionally, the screening out, from the meter code information, meter code information with a three-phase imbalance greater than a preset threshold and obtaining a corresponding third distribution transformer ID, calculating a total photovoltaic capacity included in the third distribution transformer ID, and obtaining a photovoltaic user with unbalanced three phases of the distribution transformer due to photovoltaic access according to analysis of the total photovoltaic capacity specifically includes:
screening meter code information of which the three-phase unbalance degree is greater than a preset threshold value from the meter code information and defining the meter code information as distribution transformer three-phase unbalance;
the distribution transformer capacity, the distribution transformer ID and the installation capacity are obtained through reverse correlation of table code information of distribution transformer three-phase unbalance, the installation capacity is superposed to obtain public distribution transformer access distributed photovoltaic total capacity, and photovoltaic users with three-phase unbalance of distribution transformer caused by photovoltaic access are obtained according to the relation between the photovoltaic total capacity and the distribution transformer capacity.
Optionally, the generating, according to the photovoltaic user, a report and a list of the public distribution transformer power quality failing due to distributed access includes:
and generating a public distribution transformer report containing the voltage quality failing, the power factor failing and the three-phase unbalance and a corresponding power information curve graph.
Optionally, the common distribution report includes: and the electric energy quality fails to meet the distributed photovoltaic user list and the installation reporting capacity of the public distribution transformer.
This application second aspect provides an analytic system of photovoltaic access to electric energy quality influence, the system includes:
the synchronization unit is used for regularly carrying out correlation interaction on the marketing database information, the metering database information and the production database information so as to realize data synchronization;
the first analysis unit is used for screening out voltage data which are not in a preset voltage range from the meter code information, acquiring a corresponding first distribution transformer ID, calculating the total photovoltaic capacity contained in the first distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with poor voltage quality caused by photovoltaic access;
the second analysis unit is used for screening out the power factors which are not in the preset power factor range from the meter code information, acquiring a corresponding second distribution transformer ID, calculating the photovoltaic total capacity contained in the second distribution transformer ID, and analyzing according to the photovoltaic total capacity to obtain photovoltaic users with power factors failing due to photovoltaic access;
the third analysis unit is used for screening meter code information of which the three-phase unbalance degree is greater than a preset threshold value from the meter code information, acquiring a corresponding third distribution transformer ID, calculating the total photovoltaic capacity contained in the third distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with unbalanced three phases of the distribution transformer due to photovoltaic access;
and the generating unit is used for generating reports and lists of the electric energy quality failing to meet the public distribution transformer caused by distributed access according to the photovoltaic users.
A third aspect of the present application provides an apparatus for analyzing an impact of photovoltaic access on power quality, the apparatus comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the steps of the method for analyzing the influence of photovoltaic access on the quality of electric energy according to the first aspect.
A fourth aspect of the present application provides a computer-readable storage medium for storing program code for performing the method for analyzing influence of photovoltaic access on power quality according to the first aspect.
According to the technical scheme, the method has the following advantages:
the application provides an analysis method for influence of photovoltaic access on electric energy quality, which comprises the following steps: the marketing database information, the metering database information and the production database information are associated and interacted at regular intervals, so that data synchronization is realized; screening voltage data which are not in a preset voltage range from the meter code information, acquiring a corresponding first distribution transformer ID, calculating the total photovoltaic capacity contained in the first distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with poor voltage quality caused by photovoltaic access; screening out power factors which are not in a preset power factor range from the meter code information, acquiring a corresponding second distribution transformer ID, calculating the total photovoltaic capacity contained in the second distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with power factors failing due to photovoltaic access; screening meter code information of which the three-phase unbalance degree is greater than a preset threshold value from the meter code information, acquiring a corresponding third distribution transformer ID, calculating the total photovoltaic capacity contained in the third distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with unbalanced three phases of distribution transformers due to photovoltaic access; and generating reports and lists of the electric energy quality failing of the public distribution transformer due to distributed access according to photovoltaic users.
Compared with the prior art, the method and the device have the advantages that data interconnection and intercommunication are achieved by combining meter code information, marketing photovoltaic user information and production ledger information, original technical means which can only reveal electric energy quality failing can be combined with distributed photovoltaic application information by applying intelligent analysis means, and multi-dimensional analysis of voltage quality failing, power factor failing and three-phase imbalance caused by distributed photovoltaic access is achieved. The technical problem that the prior art cannot comprehensively and deeply analyze the reasons of the poor electric energy quality of the public distribution transformer is solved.
Drawings
Fig. 1 is a schematic flowchart of an embodiment of a method for analyzing an influence of photovoltaic access on power quality provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of an embodiment of an analysis system for analyzing an influence of photovoltaic access on power quality provided in an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, an analysis method for analyzing an influence of photovoltaic access on power quality provided in an embodiment of the present application includes:
it should be noted that, in this embodiment, first, marketing database information, metering database information, and production database information are obtained;
the data acquired by the marketing database information comprises the mass database of the marketing system: the method comprises the following steps that distributed photovoltaic user numbers, user names, photovoltaic installation capacity, transformer substation access, 10kV line access, distribution transformer name access, distribution transformer ID access, meter code numbers and the like are obtained; the data mainly acquired by the information of the metering database comprises the data of a metering reflux database: the number of a meter of the public distribution transformer, the contained data information of the electric energy meter (including ABC three-phase current information, power factor data, voltage data, time point data and the like), the name of the distribution transformer, the ID of the distribution transformer, a subordinate 10kV line and the like; the data mainly acquired by the production database information comprises: the method comprises the following steps of obtaining a transformer substation name, a 10kV line ID, a distribution transformer name, a distribution transformer ID, distribution transformer capacity, transformer substation-main transformer-line-distribution transformer topological relation information and the like.
The specific process of data synchronization comprises the following steps:
1) the marketing database information and the data of the metering database information are used as main reference bottom layer data through the marketing database information, and primary association interaction is carried out by taking the distribution transformer ID as a main association field; performing secondary interactive correlation on the data which cannot be matched in the primary correlation interaction by taking the meter code number as a secondary correlation field; finally, realizing the correlation interaction and daily synchronization of the marketing database information and the metering database information by all the successfully correlated data;
2) the data of the metering database information and the production database information take the production database information as main reference bottom data, and take the distribution transformer ID as a main association field to carry out primary association interaction; performing secondary interactive association on the data which cannot be matched in the primary associated interaction by taking the 10kV line name and the distribution transformer name as secondary associated fields; finally, all the successfully correlated data realize correlation interaction and daily synchronization of the information of the metering database and the information of the production database;
3) through the steps, the marketing database information, the metering database information and the production database information are interconnected, intercommunicated and associated, and are synchronized once a day, so that the accuracy and the real-time performance of data are guaranteed.
102, screening voltage data which are not in a preset voltage range from the meter code information, acquiring a corresponding first distribution transformer ID, calculating the total photovoltaic capacity contained in the first distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with poor voltage quality caused by photovoltaic access;
it should be noted that, the voltage quality failing analysis steps caused by the distributed photovoltaic access in this embodiment are as follows:
1) by screening and analyzing voltage data in the meter code information, voltage points of 235.4V appearing in the meter code are marked as single-point overvoltage, and voltage points of 198V appearing in the meter code are defined as single-point low voltage;
2) defining the meter code of single-point overvoltage for continuously exceeding 1 hour or accumulating for 10 times as overhigh voltage; the meter code of single-point overvoltage continuously exceeds 1 hour or 10 times is defined as undervoltage; the over-high voltage and the over-low voltage are both reflected as poor voltage quality;
3) reversely associating the subordinate transformer substations, the 10kV lines, the public distribution transformer names, the distribution transformer capacities and the distribution transformer IDs through the table code information with the poor voltage quality;
4) reversely associating a distributed photovoltaic user name and a reporting capacity contained in the distribution transformer ID through the table code information with the failing voltage quality;
5) and superposing the distributed photovoltaic user installation capacities contained in the distribution transformer ID to obtain the distributed photovoltaic total capacity accessed by the public distribution transformer, dividing the distributed photovoltaic total capacity accessed by the distribution transformer capacity by the public distribution transformer, and if the distributed photovoltaic total capacity accessed by the public distribution transformer is larger than 100%, defining that the voltage quality is not good due to the distributed photovoltaic access.
103, screening out power factors which are not in a preset power factor range from the meter code information, acquiring a corresponding second distribution transformer ID, calculating the total photovoltaic capacity contained in the second distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with power factors failing due to photovoltaic access;
it should be noted that, the distributed photovoltaic access of the present embodiment causes the power factor failing analysis steps as follows:
1) the power factor data in the meter code information is screened and analyzed, and points in the meter code, where the power factor is less than 0.9, are marked as single-point power factor failure;
2) defining the meter code failing the single-point power factor for more than 1 hour or 10 times as a power factor failing grid;
3) reversely associating the subordinate transformer substations, the 10kV lines, the public distribution transformer names, the distribution transformer capacities and the distribution transformer IDs through the table code information with the power factor failing;
4) reversely associating a distributed photovoltaic user name and a reporting capacity contained in the distribution transformer ID through the code information of the power factor failing grid;
5) and superposing the reporting capacity of distributed photovoltaic users contained in the distribution transformer ID to obtain the total distributed photovoltaic capacity accessed by the public distribution transformer, and if the total distributed photovoltaic access capacity of the public distribution transformer is divided by the distribution transformer capacity, and if the total distributed photovoltaic access capacity of the public distribution transformer is larger than 100 percent and the reporting capacity of a single user accounts for more than 50 percent of the total distributed photovoltaic capacity accessed by the distribution transformer, defining that the power factor is failed due to the distributed photovoltaic access.
104, screening meter code information of which the three-phase unbalance degree is greater than a preset threshold value from the meter code information, acquiring a corresponding third distribution transformer ID, calculating the total photovoltaic capacity contained in the third distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with three-phase unbalance of distribution transformer caused by photovoltaic access;
it should be noted that, the distributed photovoltaic access of the embodiment causes the three-phase unbalance analysis of the distribution transformer in the following steps:
1) screening and analyzing the ABC three-phase current data in the meter code information, and defining the largest absolute value of the current in the ABC three phases in a single point as a maximum phase current value; defining the minimum absolute value of the current in the ABC three phases in a single point as the minimum phase current value;
2) introducing a three-phase unbalance concept, wherein the three-phase unbalance is (maximum phase current value-minimum phase current value)/maximum phase current value) 100%;
3) if the time of the three-phase unbalance degree of more than 40% per month in the meter codes is more than 10 hours according to natural month statistics, the three-phase unbalance of the distribution transformer is defined;
4) reversely associating distributed photovoltaic user names and installation capacity contained in the distribution transformer ID through table code information of three-phase unbalance of the distribution transformer;
5) and superposing the distributed photovoltaic user installation capacities contained in the distribution transformer ID to obtain the distributed photovoltaic total capacity accessed by the public distribution transformer, and if the distributed photovoltaic total capacity accessed by the public distribution transformer is divided by the distribution transformer capacity and the maximum phase current value in the ABC three phases is actually a negative value for more than 10 hours, defining that the distribution transformer three phases are unbalanced due to the distributed photovoltaic access.
And 105, generating a report and a list of the electric energy quality of the public distribution transformer which is not qualified due to distributed access according to the photovoltaic users.
It should be noted that, the embodiment automatically generates the number and the specific list of the public distribution transformers with poor electric energy quality in the whole city, and includes three general condition categories including voltage quality failure, power factor failure and three-phase imbalance, generates a voltage curve, a current curve and a power factor curve of the 10kV public distribution transformer with three problems, and also includes a distributed photovoltaic user list, a reporting capacity and the like of the public distribution transformers with poor electric energy quality.
The above is an embodiment of a method for analyzing an influence of photovoltaic access on power quality provided in the embodiment of the present application, and the following is an embodiment of a system for analyzing an influence of photovoltaic access on power quality provided in the embodiment of the present application.
Referring to fig. 2, an analysis system for analyzing an influence of photovoltaic access on power quality provided in an embodiment of the present application includes:
the synchronization unit 201 is configured to perform association and interaction on the marketing database information, the metering database information, and the production database information periodically, so as to implement data synchronization;
the first analysis unit 202 is configured to screen voltage data which is not within a preset voltage range from the meter code information, acquire a corresponding first distribution transformer ID, calculate a total photovoltaic capacity included in the first distribution transformer ID, and analyze, according to the total photovoltaic capacity, to obtain a photovoltaic user with poor voltage quality due to photovoltaic access;
the second analysis unit 203 is configured to screen out a power factor which is not within a preset power factor range from the meter code information, obtain a corresponding second distribution transformer ID, calculate a total photovoltaic capacity included in the second distribution transformer ID, and analyze, according to the total photovoltaic capacity, to obtain a photovoltaic user with a power factor failing due to photovoltaic access;
the third analysis unit 204 is configured to screen meter code information, of which three-phase imbalance is greater than a preset threshold, from the meter code information, obtain a corresponding third distribution transformer ID, calculate a total photovoltaic capacity included in the third distribution transformer ID, and analyze, according to the total photovoltaic capacity, to obtain a photovoltaic user with unbalanced three phases of the distribution transformer due to photovoltaic access;
and the generating unit 205 is used for generating reports and lists of the electric energy quality of the public distribution transformer caused by distributed access according to the photovoltaic users.
Further, the embodiment of the present application also provides an apparatus for analyzing an influence of photovoltaic access on power quality, where the apparatus includes a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the analysis method of the influence of the photovoltaic access on the electric energy quality according to the instructions in the program code.
Further, a computer-readable storage medium is provided in an embodiment of the present application, and is configured to store program codes, where the program codes are configured to execute the method for analyzing an influence of photovoltaic access on power quality according to the foregoing method embodiment.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a portable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A method for analyzing the influence of photovoltaic access on the quality of electric energy is characterized by comprising the following steps:
the marketing database information, the metering database information and the production database information are associated and interacted at regular intervals, so that data synchronization is realized;
screening voltage data which are not in a preset voltage range from the meter code information, acquiring a corresponding first distribution transformer ID, calculating the total photovoltaic capacity contained in the first distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with poor voltage quality caused by photovoltaic access;
screening out power factors which are not in a preset power factor range from the meter code information, acquiring a corresponding second distribution transformer ID, calculating the total photovoltaic capacity contained in the second distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with power factors failing due to photovoltaic access;
screening meter code information of which the three-phase unbalance degree is greater than a preset threshold value from the meter code information, acquiring a corresponding third distribution transformer ID, calculating the total photovoltaic capacity contained in the third distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with unbalanced three phases of distribution transformers due to photovoltaic access;
and generating a report and a list of the electric energy quality of the public distribution transformer failing due to distributed access according to the photovoltaic users.
2. The method for analyzing the influence of photovoltaic access on the quality of electric energy according to claim 1, wherein the regularly associating and interacting marketing database information, metering database information and production database information to achieve data synchronization specifically comprises:
taking marketing database information as reference bottom data and distribution transformer ID as a correlation field, regularly carrying out first matching on the marketing database information and the metering database information, and carrying out second matching on data which cannot be matched by using a meter code number;
and taking the production database information as reference bottom data and the distribution transformer ID as a related field, regularly matching the measurement database information and the production database information for the first time, and matching the data which cannot be matched for the second time by using the line name or the distribution transformer name.
3. The method for analyzing the influence of photovoltaic access on electric energy quality according to claim 1, wherein the step of screening out voltage data which are not in a preset voltage range from the meter code information, obtaining a corresponding first distribution transformer ID, calculating a total photovoltaic capacity contained in the first distribution transformer ID, and obtaining photovoltaic users with poor voltage quality due to photovoltaic access according to analysis of the total photovoltaic capacity specifically comprises the steps of:
screening voltage data which are not in a preset voltage range from the meter code information and defining the voltage data as voltage quality failing;
and obtaining distribution transformer capacity, distribution transformer ID and reporting capacity through reverse correlation of the table code information of the voltage quality failure, superposing the reporting capacity to obtain the distributed photovoltaic total capacity accessed by the public distribution transformer, and obtaining the photovoltaic users with the voltage quality failure caused by the photovoltaic access according to the relation between the photovoltaic total capacity and the distribution transformer capacity.
4. The method for analyzing the influence of photovoltaic access on the quality of electric energy according to claim 1, wherein the step of screening out the power factors out of the preset power factor range from the meter code information, obtaining the corresponding second distribution transformer ID, calculating the total photovoltaic capacity contained in the second distribution transformer ID, and obtaining the photovoltaic users with the power factors failing due to the photovoltaic access according to the analysis of the total photovoltaic capacity specifically comprises the steps of:
screening out a power factor which is not in a preset power factor range from the meter code information and defining the power factor as a power factor failing grid;
and obtaining distribution transformer capacity, distribution transformer ID and reporting capacity through reverse correlation of the table code information of the power factor failing grid, superposing the reporting capacity to obtain the photovoltaic total capacity of the public distribution transformer access distribution type, and obtaining the photovoltaic users of the power factor failing grid caused by the photovoltaic access according to the relation between the photovoltaic total capacity and the distribution transformer capacity.
5. The method for analyzing the influence of photovoltaic access on the quality of electric energy according to claim 1, wherein the step of screening meter code information with the degree of unbalance of three phases greater than a preset threshold from the meter code information, obtaining a corresponding third distribution transformer ID, calculating a total photovoltaic capacity contained in the third distribution transformer ID, and obtaining photovoltaic users with unbalanced three phases of distribution transformers due to photovoltaic access according to the analysis of the total photovoltaic capacity specifically comprises the steps of:
screening meter code information of which the three-phase unbalance degree is greater than a preset threshold value from the meter code information and defining the meter code information as distribution transformer three-phase unbalance;
the distribution transformer capacity, the distribution transformer ID and the installation capacity are obtained through reverse correlation of table code information of distribution transformer three-phase unbalance, the installation capacity is superposed to obtain public distribution transformer access distributed photovoltaic total capacity, and photovoltaic users with three-phase unbalance of distribution transformer caused by photovoltaic access are obtained according to the relation between the photovoltaic total capacity and the distribution transformer capacity.
6. The method for analyzing the influence of photovoltaic access on power quality according to claim 1, wherein the generating of the report and the list of the public distribution transformer power quality failure due to the distributed access according to the photovoltaic users specifically comprises:
and generating a public distribution transformer report containing the voltage quality failing, the power factor failing and the three-phase unbalance and a corresponding power information curve graph.
7. The method of analyzing the impact of photovoltaic access on power quality as set forth in claim 6, wherein said utility distribution report comprises: and the electric energy quality fails to meet the distributed photovoltaic user list and the installation reporting capacity of the public distribution transformer.
8. An analysis system for the impact of photovoltaic access on the quality of electric energy, comprising:
the synchronization unit is used for regularly carrying out correlation interaction on the marketing database information, the metering database information and the production database information so as to realize data synchronization;
the first analysis unit is used for screening out voltage data which are not in a preset voltage range from the meter code information, acquiring a corresponding first distribution transformer ID, calculating the total photovoltaic capacity contained in the first distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with poor voltage quality caused by photovoltaic access;
the second analysis unit is used for screening out the power factors which are not in the preset power factor range from the meter code information, acquiring a corresponding second distribution transformer ID, calculating the photovoltaic total capacity contained in the second distribution transformer ID, and analyzing according to the photovoltaic total capacity to obtain photovoltaic users with power factors failing due to photovoltaic access;
the third analysis unit is used for screening meter code information of which the three-phase unbalance degree is greater than a preset threshold value from the meter code information, acquiring a corresponding third distribution transformer ID, calculating the total photovoltaic capacity contained in the third distribution transformer ID, and analyzing according to the total photovoltaic capacity to obtain photovoltaic users with unbalanced three phases of the distribution transformer due to photovoltaic access;
and the generating unit is used for generating reports and lists of the electric energy quality failing to meet the public distribution transformer caused by distributed access according to the photovoltaic users.
9. An apparatus for analyzing the impact of photovoltaic access on power quality, the apparatus comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the analysis method of the influence of the photovoltaic access on the quality of the electric energy according to any one of claims 1 to 7 according to instructions in the program code.
10. A computer-readable storage medium, characterized in that it is configured to store a program code for executing the method for analyzing the impact of a photovoltaic access on the quality of electric energy according to any one of claims 1 to 7.
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| CN114884095A (en) * | 2022-07-11 | 2022-08-09 | 广东电网有限责任公司佛山供电局 | Method and system for analyzing annual maximum current of distribution network line caused by photovoltaic return |
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| CN114884095A (en) * | 2022-07-11 | 2022-08-09 | 广东电网有限责任公司佛山供电局 | Method and system for analyzing annual maximum current of distribution network line caused by photovoltaic return |
| CN114884095B (en) * | 2022-07-11 | 2022-12-02 | 广东电网有限责任公司佛山供电局 | Method and system for analyzing annual maximum current of distribution network line caused by photovoltaic return |
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