CN111478340B - Distribution network line reactive compensation condition analysis method - Google Patents
Distribution network line reactive compensation condition analysis method Download PDFInfo
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- CN111478340B CN111478340B CN202010298746.0A CN202010298746A CN111478340B CN 111478340 B CN111478340 B CN 111478340B CN 202010298746 A CN202010298746 A CN 202010298746A CN 111478340 B CN111478340 B CN 111478340B
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
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Abstract
The invention provides a distribution network line reactive power compensation condition analysis method, which analyzes and monitors the distribution network line reactive power compensation condition in an intelligent and quasi-real time manner, knows which lines of the whole distribution network have poor power factors, which lines have reactive power reverse transmission conditions, and the severity of the poor power factors and the poor reactive power reverse transmission conditions, is beneficial to the improvement of the reactive power condition of the whole distribution network, ensures that the reactive power management of the whole distribution network is legal and mainly improves.
Description
Technical Field
The invention relates to the field of electric power information processing, in particular to a distribution network line reactive compensation condition analysis method.
Background
With the development of the power distribution network and the higher and higher requirements of customers on the power consumption quality and the power consumption stability, the whole power distribution network is mainly subjected to rough voltage management and is transited to the reactive condition management of fine management. Aiming at the analysis of the reactive compensation condition of the whole power distribution network at present, the situations that the distribution network line carries out reactive power back-feeding to the transformer substation and the reactive factors of the 10kV outgoing line side of the transformer substation are not qualified exist sometimes, and particularly during the spring festival, the distribution network line carries out a large amount of reactive power back-feeding to the transformer substation to cause the voltage of the whole power distribution network to be unqualified.
However, the reactive compensation condition of the distribution network line still stays at a relatively initial stage at present, and due to the lack of effective technology and method, the reactive compensation condition of the distribution network line can only be manually recorded by means of detection of a site meter or checked by means of a simple metering system, and the reactive compensation condition of the whole distribution network is not uniformly monitored and controlled, so that the reactive management of the whole distribution network still falls behind.
In view of the above situation, there is an urgent need for a technology or method capable of performing centralized management and control and analysis on the reactive compensation situation of the distribution network line, and simply analyzing and presenting the reactive compensation situation of the whole distribution network.
Disclosure of Invention
The invention provides a high-accuracy distribution network line reactive compensation condition analysis method.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
a distribution network line reactive compensation condition analysis method comprises the following steps:
s1: the distribution network line carries out on-site collection of the reactive condition of the distribution network line at the substation end of the transformer substation and transmits the reactive condition to the metering automation master station;
s2: acquiring information of a platform account, a tidal current diagram of the transformer substation and related information of a circuit diagram through acquisition of information of a power grid GIS system;
s3: combining data, and intelligently analyzing reactive compensation conditions;
s4: and intelligently and automatically outputting a reactive compensation condition analysis report.
Further, the specific process of step S1 is:
and transmitting the forward active numerical value, the forward reactive numerical value, the reverse active numerical value and the reverse reactive numerical value of the distribution network line, which are acquired from the outgoing side general table of the 10kV distribution network line of the transformer substation, to the metering automation master station through an optical fiber channel, and putting the acquired data into a database.
Further, the specific process of step S2 is:
the method comprises the steps that a data channel is established in a power grid GIS system, obtained information is subjected to graph-mode conversion, an SVG file is converted into an XML file, topology analysis is conducted, and the subordination relation of a transformer substation and a distribution network line is obtained according to the topology relation.
Further, the specific process of step S3 is:
(1) carrying out data combination on the obtained topological relation data and the data automatically transmitted by metering, carrying out data cleaning and filtering by taking a line name and a line ID as fields, and generating various data by taking a transformer substation-distribution network line as a keyword, wherein the data comprises active and reactive data under a subordinate transformer substation and a distribution network line;
(2) carrying out intelligent analysis on reactive compensation conditions, setting rules as forward active and forward reactive power acquisition values from 0 point of the previous day to 0 point of the current day for integral accumulation, obtaining 'active total P' and 'reactive total Q', and calculating power factors of each line;
(3) accumulating the data 'reverse reactive power value' automatically transmitted by metering to obtain 'reverse reactive power total', and calculating the reverse reactive power total of each line;
(4) and intelligently analyzing the reactive compensation condition according to the rule:
classification rules: classifying the calculated power factors of each line into the following steps: cos phi > is 0.95, 0.95> cos phi > is 0.90; 0.90> cos Φ > -0.85; 0.85> cos Φ > -0.80.
Further, the specific process of step S4 is:
after intelligent analysis, a reactive compensation condition analysis report is output, and the report content mainly comprises: a distribution network line reactive compensation condition summary table; a summary list and a concrete list of the reactive power reverse delivery condition of the distribution network lines exist; and a summary list and a concrete list of distribution network line power factor failure conditions.
Further, in step S3, the power factor failing rule: the power factor cos Φ <0.9 is recorded as the power factor failing line.
Further, in step S3, the reactive power reverse rule: and the total reverse reactive power >0 is recorded as that a reactive power reverse transmission line exists.
Further, in step S3, the power factor calculation formula is: cos Φ P/S P/√ P ^2+ Q ^ 2.
Further, in the step S1, the collection rule is set to 1 sampling for 15 minutes.
Further, in step S1, the ETL interface is used to put the data into the database.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
according to the invention, the reactive compensation conditions of the distribution network lines can be analyzed and monitored in an intelligent and quasi-real-time manner, so that the power factors of the lines of the whole distribution network are not qualified, the lines of the distribution network have the reactive power back-off conditions, and the severity of the power factors and the reactive power back-off conditions is favorable for the improvement of the reactive power conditions of the whole distribution network, so that the reactive power management of the whole distribution network is legal and key to the improvement.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1, the method for analyzing the reactive compensation condition of the distribution network line comprises the steps of carrying out on-site distribution network line reactive condition collection 1 on the distribution network line at a substation end of a transformer substation, transmitting distribution network line active and distribution network line reactive numerical values obtained from a substation 10kV distribution network line outgoing side general table to a metering automation master station 2 through an optical fiber channel, and putting data into a database through an ETL (extract transform load) mode interface 3 to carry out data combination 6; on the other hand, according to the power grid GIS system 4, a data channel is established, the topological relation is obtained, graph model conversion is carried out, relation data of a transformer substation and a distribution network line are obtained, and data parallel connection 6 is carried out; combining 6 the key data, carrying out intelligent analysis 7 on the reactive compensation conditions of all distribution network lines in the area according to analysis rules, and outputting an analysis result 8, wherein the analysis result is classified into a list 9 with reactive power reverse delivery conditions, a list 10 with power factor failing and a list 11 with power factor failing; and finally outputting a reactive compensation condition analysis report, wherein the report comprises the following contents: a distribution network line reactive compensation condition summary table; a summary list and a concrete list of the reactive power reverse delivery condition of the distribution network lines exist; a summary list and a specific list of distribution network line power factor failure conditions and the like.
The specific implementation process is as follows:
s1: the analysis object input 13 may input the date and time period required for analysis or the substation or power management section, and enter S2 and S5.
S2: and establishing a data channel through the power grid GIS system information acquisition 14, acquiring information related to the ledger, the transformer substation tidal current diagram and the circuit diagram, and entering S3.
S3: carrying out graph-mode conversion according to the information transmitted in S2, converting the SVG file into an XML file, carrying out topology analysis, obtaining the subordination relation of 'transformer substation-distribution network line' according to the topological relation, and entering S7;
s4: the method comprises the steps of utilizing a station-side intelligent meter installed at 10kV outgoing line intervals of a transformer substation to collect 16 reactive power conditions of a distribution network line on site, obtaining forward active, forward reactive, reverse active and reverse reactive values of the 10kV line on site, setting a collection rule to be sampling 1 time in 15 minutes, sending the values to an automatic metering main station according to an optical fiber channel, and entering S5.
S5: the automatic metering master station 17 acquires and collects data, sets a distribution network line sampling data value list according to forward active, forward reactive, reverse active and reverse reactive curves of each distribution network line, and sets null values of sampling points with errors and invariants according to sampling rules, and the method enters S6.
S6: and (4) performing interface transmission 18 in an ELT mode, transmitting and storing the data which is processed by the metering automation master station, and entering S7.
S7: carrying out data combination 19 on the data transmitted from S3 and S6, carrying out data cleaning and filtering by taking the line name and the line ID as fields, and generating each piece of data by taking the transformer substation-distribution network line as a keyword, wherein the data comprises active and reactive data under the subordinate transformer substations and the distribution network line;
s8: analyzing the reactive compensation condition 20, setting a rule that forward active and forward reactive obtaining values from 0 point of the previous day to 0 point of the current day (continuous 24 hours) are subjected to integral accumulation to obtain an active total P and a reactive total Q, and calculating a formula according to power factors: calculating a power factor according to the cos phi, P/S, the total active power P/√ (P ^2+ Q ^ 2); accumulating the reverse reactive power values to obtain a reverse reactive power total number, and entering S9;
s9: judging whether the power factor fails 21 of the numerical value transmitted in the S8, and recording the numerical value with the power factor being more than or equal to 0.9 as the power factor passing 22; if the power factor is greater than or equal to 0.9, marking the power factor as the failing grid 23; entering S10:
s10: judging whether reactive power back-feeding exists or not in urgent need of the value transmitted in S9, and recording that reactive power back-feeding exists 25 when the total reverse reactive power is greater than 0; if the total reverse reactive power is equal to 0, the reactive power reverse feeding 26 is recorded to be absent, and the step S11 is entered;
s11: after intelligent analysis, a reactive compensation condition analysis report 27 is output, and the report mainly comprises the following contents: a distribution network line reactive compensation condition summary table; a summary list and a concrete list of the reactive power reverse delivery condition of the distribution network lines exist; a summary list and a specific list of distribution network line power factor failure conditions and the like.
The same or similar reference numerals correspond to the same or similar parts;
the positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. A distribution network line reactive compensation condition analysis method is characterized by comprising the following steps:
s1: the distribution network line carries out on-site collection of the reactive condition of the distribution network line at the substation end of the transformer substation and transmits the reactive condition to the metering automation master station;
s2: acquiring information of a platform account, a tidal current diagram of the transformer substation and related information of a circuit diagram through acquisition of information of a power grid GIS system;
s3: combining data, and intelligently analyzing reactive compensation conditions;
s4: intelligently and automatically outputting a reactive compensation condition analysis report;
the specific process of step S1 is:
transmitting a forward active numerical value, a forward distribution network line reactive numerical value, a reverse active numerical value and a reverse reactive numerical value of a distribution network line, which are acquired from a 10kV distribution network line outgoing side general table of a transformer substation, to a metering automation master station through an optical fiber channel, and putting acquired data into a database;
the specific process of step S2 is:
the method comprises the steps that a data channel is established in a power grid GIS system, obtained information is subjected to graph-mode conversion, an SVG file is converted into an XML file, topology analysis is carried out, and the subordination relation of a transformer substation and a distribution network line is obtained according to the topology relation;
the specific process of step S3 is:
(1) carrying out data combination on the obtained topological relation data and the data automatically transmitted by metering, carrying out data cleaning and filtering by taking a line name and a line ID as fields, and generating various data by taking a transformer substation-distribution network line as a keyword, wherein the data comprises active and reactive data under a subordinate transformer substation and a distribution network line;
(2) carrying out intelligent analysis on reactive compensation conditions, setting rules as forward active and forward reactive power acquisition values from 0 point of the previous day to 0 point of the current day for integral accumulation, obtaining 'active total P' and 'reactive total Q', and calculating power factors of each line;
(3) accumulating the data 'reverse reactive power value' automatically transmitted by metering to obtain 'reverse reactive power total', and calculating the reverse reactive power total of each line;
(4) and intelligently analyzing the reactive compensation condition according to the rule:
classification rules: classifying the calculated power factors of each line into the following steps: cos Φ > =0.95, 0.95> cos Φ > = 0.90; 0.90> cos Φ > = 0.85; 0.85> cos Φ > = 0.80.
2. The distribution network line reactive compensation situation analysis method according to claim 1, wherein the specific process of the step S4 is as follows:
after intelligent analysis, a reactive compensation condition analysis report is output, and the report content mainly comprises: a distribution network line reactive compensation condition summary table; a summary list and a concrete list of the reactive power reverse delivery condition of the distribution network lines exist; and a summary list and a concrete list of distribution network line power factor failure conditions.
3. The distribution network line reactive compensation situation analysis method according to claim 2, wherein in the step S3, the power factor failing rule: the power factor cos Φ <0.9 is recorded as the power factor failing line.
4. The distribution network line reactive compensation situation analysis method according to claim 3, wherein in step S3, the reactive power back-off rule is: and the total reverse reactive power >0 is recorded as that a reactive power reverse transmission line exists.
5. The distribution network line reactive compensation situation analysis method according to claim 4, wherein in step S3, the power factor calculation formula is:
。
6. the distribution network line reactive compensation situation analysis method according to claim 5, wherein in the step S1, the collection rule is set to 1 sampling time in 15 minutes.
7. The distribution network line reactive compensation situation analysis method of claim 6, wherein in step S1, the data is placed in the database by an ETL mode interface.
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