CN110688619B - Theoretical line loss calculation system and method for power distribution network - Google Patents
Theoretical line loss calculation system and method for power distribution network Download PDFInfo
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- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
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- G—PHYSICS
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
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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
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The invention discloses a theoretical line loss calculation system and a theoretical line loss calculation method of a power distribution network, wherein the theoretical line loss calculation system of the power distribution network comprises the following components: the parameter importing module imports physical parameters related to theoretical line loss calculation; the definition module is used for defining theoretical line loss calculation rules, wherein the theoretical line loss calculation rules comprise daily line loss calculation rules and monthly line loss calculation rules; the maintenance module is used for carrying out maintenance operation on the physical parameters and the theoretical line loss calculation rules; the model building module is used for building a theoretical line loss calculation model according to the physical parameters; the theoretical line loss calculation module calculates theoretical line loss according to theoretical line loss calculation rules, theoretical line loss calculation models and power consumption load parameters; and the deriving module derives the calculation result of the theoretical line loss calculation module. The invention expands the calculation and management range of the power distribution network, effectively helps the correct decision, improves the calculation accuracy and the working efficiency of the theoretical line loss, has low construction cost and has good popularization and application prospect.
Description
Technical Field
The invention relates to the technical field of power, in particular to a theoretical line loss calculation system and method of a power distribution network.
Background
The line loss is the electric energy loss generated in the electric energy transmission process, the line loss rate is an index for measuring the running management level of the power grid, and the line loss rate is also an important reference basis in the planning and construction of the intelligent power grid. The theoretical line loss calculation can comprehensively reflect the planning design level, the power grid construction level, the technical progress level and the production operation and operation management level of the power grid, and is also an important technical management means of power supply enterprises. Compared with other works, the line loss management has certain specificity, the data acquisition and information maintenance requirements in the maintenance period are continuous and uninterrupted, the workload is uniformly distributed on the whole time axis, and meanwhile, the calculation period with larger workload of loss calculation and result analysis exists, namely, the remarkable large-scale burst calculation amount exists, and particularly, the large-scale power grid performance is more outstanding. The existing theoretical line loss calculation system often adopts independent design, independent construction and self-maintenance modes, has the problems of long construction period, high construction cost, incomplete maintenance, inflexible expansion and the like, and simultaneously, the calculation results of a plurality of branch departments are difficult to collect and can not be analyzed timely and comprehensively. In addition, the existing off-line calculation modes and the like influence the accuracy of theoretical line loss calculation to a certain extent.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a theoretical line loss calculation system and method of a power distribution network.
The technical scheme of the invention is as follows:
a theoretical line loss calculation system of a power distribution network, comprising:
the parameter importing module imports physical parameters related to theoretical line loss calculation;
the definition module is used for defining theoretical line loss calculation rules, wherein the theoretical line loss calculation rules comprise a solar line loss calculation rule and a lunar line loss calculation rule;
the maintenance module is used for carrying out maintenance operation on the physical parameters and the theoretical line loss calculation rule;
the model building module is used for building a theoretical line loss calculation model according to the physical parameters;
the theoretical line loss calculation module calculates theoretical line loss according to the theoretical line loss calculation rule, the theoretical line loss calculation model and the power consumption load parameter; and
and the deriving module derives the calculation result of the theoretical line loss calculation module.
Preferably, the physical parameters include a line information physical parameter and a station area information physical parameter.
Preferably, the physical parameters of the line information include organization, user name, feeder number, power supply path, wire model, resistivity, line length, resistance, total resistance of line, feeder power supply radius, distribution number of the segment, operating voltage, loss constant, correction system, data time, split number and whether line information maintenance can be performed.
Preferably, the physical parameters of the platform information include organization, platform number, platform name, user number, user name, transformer name, line model, cooling mode, line loss rate, copper loss value, iron loss value, branch length, platform attribute, main line model, number of single-phase electric energy meters, number of three-phase electric energy meters, distribution capacity, power supply radius, load distribution and platform load type.
Preferably, the method is characterized in that the daily power supply selling electricity meter code acquisition sequence rule is that daily electricity is calculated by taking a daily freezing meter code according to a metering system, and when the daily freezing meter code is missing, the daily electricity is calculated by taking a zero point of the daily freezing meter code; when the day-freezing table code and the day-freezing table code at zero point are missing, the adjacent day-freezing table code is taken to calculate the day electric quantity;
the month line loss calculation rule is that month freezing table codes are taken according to a metering system to calculate month electric quantity, and when the month freezing table codes are missing, zero points are taken to calculate month electric quantity; and when the month freezing list code and the month freezing list code at the zero point are missing, taking the adjacent month freezing list code to calculate the month electric quantity.
Preferably, the method is characterized in that the initial setting of the daily power supply selling quantity code deletion translation rule is that the daily freezing meter code is translated for plus or minus 3 hours, and the daily freezing meter code in the low-voltage area of the station area is not translated; and the initial setting of the translation rule for missing the monthly power supply quantity code is that the monthly freezing list code translates positively and negatively for 3 days.
Preferably, the theoretical line loss calculation module includes:
the automatic calculation module is used for automatically calculating line losses by sharing the trans-regional lines, calculating the sharing proportion according to the electricity consumption of each trans-regional line, and automatically combining and calculating theoretical line losses for the ring network lines, the transfer lines, the cutting-over lines and the transformer areas according to the load transfer system;
and the manual calculation module is used for manually configuring a merging plan of the ring network line, the transfer line, the cutting-over line and the station area according to own requirements and then calculating theoretical line loss.
Preferably, the maintenance operations include viewing, adding, modifying and deleting.
Preferably, the electrical load parameters include voltage, current, active power, reactive power, power factor, maximum current, minimum current, head-end voltage, tail-end voltage, maximum load, minimum load, rated voltage, running time, statistical line loss value and theoretical line loss value of the last year.
The theoretical line loss calculation method of the power distribution network is characterized by comprising the following steps of:
providing a parameter importing module, importing physical parameters related to theoretical line loss calculation;
providing a definition module, and defining theoretical line loss calculation rules, wherein the theoretical line loss calculation rules comprise a solar line loss calculation rule and a lunar line loss calculation rule;
providing a maintenance module, and performing maintenance operation on the physical parameters and the theoretical line loss calculation rule;
providing a model building module, and building a theoretical line loss calculation model according to the physical parameters;
providing a theoretical line loss calculation module, and calculating theoretical line loss according to the theoretical line loss calculation rule, the theoretical line loss calculation model and the power consumption load parameters; and
and providing an export module for exporting the calculation result of the theoretical line loss calculation module.
The invention has the substantial effects that: the calculation and management range of the power distribution network is enlarged, the calculation accuracy and the working efficiency of the theoretical line loss are improved, the construction cost is low, the expansion is flexible, the workload of line loss management staff is lightened, the correct decision is effectively helped, and powerful support is provided for the optimization design of a large-scale power network, the economical efficiency of the operation of a power system and the improvement of the power supply quality.
Drawings
FIG. 1 is a block diagram of an embodiment of the present invention;
FIG. 2 is a flow chart of a method according to an embodiment of the invention.
Detailed Description
The invention is further described below with reference to the drawings and embodiments:
as shown in fig. 1, a theoretical line loss calculation system of a power distribution network includes:
the parameter import module 11 imports the physical parameters related to theoretical line loss calculation.
The definition module 12 defines theoretical line loss calculation rules including a solar line loss calculation rule and a lunar line loss calculation rule.
The maintenance module 13 performs maintenance operation on the physical parameters and the theoretical line loss calculation rule.
The model building module 14 builds a theoretical line loss calculation model according to the physical parameters.
The theoretical line loss calculation module 15 calculates theoretical line loss according to theoretical line loss calculation rules, theoretical line loss calculation models and power consumption load parameters; and
and an export module 16 exports the calculation result of the theoretical line loss calculation module 15.
Preferably, the physical parameters include line information physical parameters and zone information physical parameters.
Preferably, the line information physical parameters include organization, user name, feeder number, power supply path, wire model, resistivity, line length, resistance, total line resistance, feeder power supply radius, segment carried distribution number, operating voltage, loss constant, correction system, data time, split number, and whether line information maintenance can be performed.
Preferably, the physical parameters of the platform region information include organization, platform region number, platform region name, user number, user name, transformer name, line model, cooling mode, line loss rate, copper loss value, iron loss value, branch line length, platform region attribute, main line model, number of single-phase electric energy meters, number of three-phase electric energy meters, distribution capacity, power supply radius, load distribution and platform region load type.
Preferably, the daily power supply selling electricity meter code acquisition sequence rule is that daily electricity is calculated according to a daily freezing meter code of a metering system, and when the daily freezing meter code is missing, the daily electricity is calculated by taking a zero daily freezing meter code; when the day freezing table code and the zero day freezing table code are missing, the adjacent day freezing table codes are taken to calculate the daily electric quantity.
The month line loss calculation rule is that month electric quantity is calculated according to a month freezing list code of a metering system, and when the month freezing list code is missing, the month electric quantity is calculated by taking a zero month freezing list code; when the month freezing list code and the zero month freezing list code are missing, the adjacent month freezing list code is taken to calculate the month electric quantity.
Preferably, the initial setting of the daily power supply selling quantity code deletion translation rule is that the daily freezing meter code is translated for plus or minus 3 hours, and the daily freezing meter code in the low-voltage area of the station area is not translated; the initial setting of the monthly power supply quantity code missing translation rule is that the monthly freezing list code is translated positively and negatively for 3 days.
Preferably, the theoretical line loss calculation module 15 includes:
and the automatic calculation module is used for automatically calculating line losses by sharing the trans-regional lines, calculating the sharing proportion according to the power consumption of each trans-regional line, and automatically combining and calculating theoretical line losses for the ring network lines, the transfer lines, the cutting-over lines and the transformer areas according to the load transfer system.
And the manual calculation module is used for manually configuring a merging plan of the looped network line, the transfer line, the cutting-over line and the station area according to own requirements and then calculating theoretical line loss.
Preferably, the maintenance operations include viewing, adding, modifying and deleting.
Preferably, the electrical load parameters include voltage, current, active power, reactive power, power factor, maximum current, minimum current, head end voltage, maximum load, minimum load, rated voltage, run time, statistical line loss value, and theoretical line loss value of the last year.
Preferably, the deriving module 16 derives the calculation result of the theoretical line loss calculating module 15 in the form of a report. The theoretical line loss calculation result can be quickly and comprehensively known through report form generation, and the progress of subsequent work is facilitated.
Specifically, the theoretical line loss calculation rule and calculation mode are as follows:
and selecting 9 months of last year as a typical representative month of theoretical line loss calculation, and calculating theoretical line loss rate for the selected 10kV feeder line and 0.4kV transformer area according to the following line loss calculation rule.
(1) 10kV feeder:
input electric quantity = substation (feeder line) checking meter user forward electric quantity + substation (feeder line) checking meter user replacement forward electric quantity-substation (feeder line) checking meter user deduction electric quantity +10 (20) kV local power plant user internet surfing electric quantity +10 (20) kV wharf selling gateway user electric quantity +0.4kV photovoltaic local area checking meter user reverse electric quantity;
output electric quantity=public line special-purpose variable household electric quantity+special line special-purpose variable household electric quantity+10 (20) kV wharf sales gateway household electric quantity+station area examination meter household electric quantity+special-purpose power deduction electric quantity.
Reverse power supply = substation (feeder line) check meter household reverse power
Theoretical line loss rate = (input power-output power-back power)/input power×100%
(2) 0.4kV transformer area:
input electric quantity = platform area examination meter household electric quantity +0.4kV low-voltage local power plant household electric quantity (including photovoltaic internet power quantity)
Output electric quantity=public transformer user electric quantity (electric quantity for charging pile in district with station)
Reverse power supply = counter check meter household reverse power
Theoretical line loss rate= (input power amount-output power amount-back power amount)/input power amount×100%.
As shown in fig. 2, a theoretical line loss calculation method of a power distribution network includes the following steps:
step S1: a parameter import module 11 is provided for importing physical parameters related to theoretical line loss calculation.
Step S2: a definition module 12 is provided for defining theoretical line loss calculation rules including daily line loss calculation rules and monthly line loss calculation rules.
Step S3: a maintenance module 13 is provided for performing maintenance operations on the physical parameters and theoretical line loss calculation rules.
Step S4: a model building module 14 is provided for building a theoretical line loss calculation model from the physical parameters.
Step S5: a theoretical line loss calculation module 15 is provided for calculating theoretical line loss based on theoretical line loss calculation rules, theoretical line loss calculation models and electrical load parameters.
Step S6: an deriving module 16 is provided for deriving the calculation result of the theoretical line loss calculation module 15.
The invention has the substantial effects that: the calculation and management range of the power distribution network is enlarged, the calculation accuracy and the working efficiency of the theoretical line loss are improved, the construction cost is low, the expansion is flexible, the workload of line loss management staff is lightened, the correct decision is effectively helped, and powerful support is provided for the optimization design of a large-scale power network, the economical efficiency of the operation of a power system and the improvement of the power supply quality.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the implementation of the invention is not limited by the above manner, and it is within the scope of the invention to apply the inventive concept and technical solution to other situations as long as various improvements made by the inventive concept and technical solution are adopted, or without any improvement.
Claims (7)
1. A theoretical line loss calculation system of a power distribution network, comprising:
the parameter importing module imports physical parameters related to theoretical line loss calculation;
the definition module is used for defining theoretical line loss calculation rules, wherein the theoretical line loss calculation rules comprise a solar line loss calculation rule and a lunar line loss calculation rule;
the maintenance module is used for carrying out maintenance operation on the physical parameters and the theoretical line loss calculation rule;
the model building module is used for building a theoretical line loss calculation model according to the physical parameters;
the theoretical line loss calculation module calculates theoretical line loss according to the theoretical line loss calculation rule, the theoretical line loss calculation model and the power consumption load parameter;
the deriving module derives the calculation result of the theoretical line loss calculation module;
the automatic calculation module is used for automatically calculating line losses by sharing the trans-regional lines, calculating the sharing proportion according to the electricity consumption of each trans-regional line, and automatically combining and calculating theoretical line losses for the ring network lines, the transfer lines, the cutting-over lines and the transformer areas according to the load transfer system;
the manual calculation module manually configures a merging plan of the ring network line, the transfer line, the cutting-over line and the station area according to own requirements, and then calculates theoretical line loss;
the daily power supply and selling meter code acquisition sequence rule is that daily electric quantity is calculated according to a daily freezing meter code taken by a metering system, and when the daily freezing meter code is missing, the daily electric quantity is calculated according to the daily freezing meter code taken by a zero point; when the day-freezing table code and the day-freezing table code at zero point are missing, the adjacent day-freezing table code is taken to calculate the day electric quantity; the month line loss calculation rule is that month freezing table codes are taken according to a metering system to calculate month electric quantity, and when the month freezing table codes are missing, zero points are taken to calculate month electric quantity; when the month freezing table code and the month freezing table code at zero point are missing, the adjacent month freezing table code is taken to calculate the month electric quantity; the initial setting of the daily power supply selling quantity code deletion translation rule is that the daily freezing meter code is translated for plus or minus 3 hours, and the daily freezing meter code in the low-voltage area of the station area is not translated; the initial setting of the monthly power supply quantity code missing translation rule is that the monthly freezing list code is translated positively and negatively for 3 days.
2. The system of claim 1, wherein the physical parameters include line information physical parameters and zone information physical parameters.
3. The system of claim 2, wherein the physical parameters of the line information include organization, customer name, feeder number, power path, wire model, resistivity, line length, resistance, total line resistance, feeder radius, segment number, operating voltage, loss constant, correction system, data time, split number, and availability of line information maintenance.
4. The system of claim 2, wherein the physical parameters of the information of the transformer area include organization, a transformer area number, a transformer area name, a user number, a user name, a transformer area name, a line model, a cooling mode, a line loss rate, a copper loss value, an iron loss value, a branch line length, a transformer area attribute, a main line model, a single-phase electric energy meter number, a three-phase electric energy meter number, a distribution capacity, a power supply radius, a load distribution, and a transformer area load type.
5. The theoretical line loss calculation system of a power distribution network of claim 1, wherein the maintenance operations include viewing, adding, modifying, and deleting.
6. The system of claim 1, wherein the electrical load parameters include voltage, current, active power, reactive power, power factor, maximum current, minimum current, head-end voltage, end-to-end voltage, maximum load, minimum load, rated voltage, run time, statistical line loss value, and theoretical line loss value from year to year.
7. The theoretical line loss calculation method of the power distribution network is characterized by comprising the following steps of:
providing a parameter importing module, importing physical parameters related to theoretical line loss calculation;
providing a definition module, and defining theoretical line loss calculation rules, wherein the theoretical line loss calculation rules comprise a solar line loss calculation rule and a lunar line loss calculation rule;
providing a maintenance module, and performing maintenance operation on the physical parameters and the theoretical line loss calculation rule;
providing a model building module, and building a theoretical line loss calculation model according to the physical parameters;
providing a theoretical line loss calculation module, and calculating theoretical line loss according to the theoretical line loss calculation rule, the theoretical line loss calculation model and the power consumption load parameters;
providing an export module for exporting the calculation result of the theoretical line loss calculation module;
an automatic calculation module is provided, line losses are calculated automatically by sharing the trans-regional lines, the sharing proportion is calculated according to the electricity consumption of each trans-regional line, and theoretical line losses are calculated automatically by combining the looped network lines, the trans-supply lines, the cutting-over lines and the transformer areas according to the load trans-supply system;
providing a manual calculation module, manually configuring a merging plan of the ring network line, the transfer line, the cutting-over line and the station area according to own requirements, and then calculating theoretical line loss;
the daily power supply and selling meter code acquisition sequence rule is that daily electric quantity is calculated according to a daily freezing meter code taken by a metering system, and when the daily freezing meter code is missing, the daily electric quantity is calculated according to the daily freezing meter code taken by a zero point; when the day-freezing table code and the day-freezing table code at zero point are missing, the adjacent day-freezing table code is taken to calculate the day electric quantity; the month line loss calculation rule is that month freezing table codes are taken according to a metering system to calculate month electric quantity, and when the month freezing table codes are missing, zero points are taken to calculate month electric quantity; when the month freezing table code and the month freezing table code at zero point are missing, the adjacent month freezing table code is taken to calculate the month electric quantity; the initial setting of the daily power supply selling quantity code deletion translation rule is that the daily freezing meter code is translated for plus or minus 3 hours, and the daily freezing meter code in the low-voltage area of the station area is not translated; the initial setting of the monthly power supply quantity code missing translation rule is that the monthly freezing list code is translated positively and negatively for 3 days.
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