CN110688619A - Theoretical line loss calculation system and method for power distribution network - Google Patents
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Abstract
The invention discloses a theoretical line loss calculation system and a method of a power distribution network, wherein the theoretical line loss calculation system of the power distribution network comprises the following steps: the parameter importing module imports physical parameters related to theoretical line loss calculation; the definition module is used for defining a theoretical line loss calculation rule, wherein the theoretical line loss calculation rule comprises a daily line loss calculation rule and a monthly 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 is used for calculating theoretical line loss according to the theoretical line loss calculation rule, the theoretical line loss calculation model and the power load parameters; and the derivation module is used for deriving the calculation result of the theoretical line loss calculation module. The method expands the calculation and management range of the power distribution network, effectively helps the power distribution network to make a 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 prospects.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a theoretical line loss calculation system and method for a power distribution network.
Background
The line loss is generated in the electric energy transmission process, and the line loss rate is an index for measuring the operation management level of the power grid and 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 of the power grid, the construction level of the power grid, the technical progress level and the production operation and management level, and is also an important technical management means for power supply enterprises. Compared with other work, line loss management has certain particularity, data acquisition and information maintenance in a maintenance period are required to be continuous and uninterrupted, workload is uniformly distributed on the whole time axis, and meanwhile, a calculation period with large loss calculation and result analysis workload exists, namely, obvious large-scale sudden calculation amount exists, and particularly large-scale power grid performance is more prominent. The existing theoretical line loss computing system usually adopts an independent design mode, an independent construction mode and a self-maintenance mode, has the problems of long construction period, high construction cost, improper maintenance, inflexible expansion and the like, and simultaneously, the computing results of a plurality of branch management departments are difficult to summarize, and timely and comprehensive analysis cannot be performed. In addition, the currently adopted offline calculation and other manners affect the precision 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 for a power distribution network, comprising:
the parameter importing module imports physical parameters related to theoretical line loss calculation;
the system comprises a definition module, a calculation module and a calculation module, wherein the definition module defines theoretical line loss calculation rules which 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 rule;
the model establishing module is used for establishing a theoretical line loss calculation model according to the physical parameters;
the theoretical line loss calculation module is used for calculating theoretical line loss according to the theoretical line loss calculation rule, the theoretical line loss calculation model and the power load parameters; and
and the derivation module is used for deriving the calculation result of the theoretical line loss calculation module.
Preferably, the physical parameters include line information physical parameters and station information physical parameters.
Preferably, the line information physical parameters include organization, user name, feeder line number, power supply path, wire model, resistivity, line length, resistance, total line resistance, feeder line power supply radius, section-carried distribution number, operating voltage, loss constant, correction system, data time, split number and whether line information maintenance is possible.
Preferably, the station information physical parameters include organization, station number, station name, user number, user name, transformer name, line model, cooling mode, line loss rate, copper loss value, iron loss value, branch line length, station attribute, trunk line model, single-phase electric energy meter number, three-phase electric energy meter number, distribution transformation capacity, power supply radius, load distribution and station load type.
Preferably, the daily electricity supply and sale quantity meter code obtaining sequence rule is that the daily electricity quantity is calculated by taking a daily freezing meter code according to a metering system, and when the daily freezing meter code is absent, the zero point is taken to calculate the daily electricity quantity by the daily freezing meter code; when the daily freezing table code and the zero-point daily freezing table code are missing, calculating the daily electric quantity by taking the adjacent daily freezing table code;
the month line loss calculation rule is that the month electric quantity is calculated according to the month freezing table code of the metering system, and when the month freezing table code is missing, the month electric quantity is calculated according to the month freezing table code at zero point; and when the month freezing table code and the month freezing table code at the zero point are missing, taking the adjacent month freezing table code to calculate the month electric quantity.
Preferably, the missing translation rule of the daily power supply and sales meter codes is initially set to be positive and negative 3 hours of translation of the daily frozen meter codes, and the daily frozen meter codes in the low-voltage area of the transformer area do not translate; the initial setting of the monthly electricity supply and sale meter code missing translation rule is that the monthly electricity supply and sale meter codes are positively and negatively translated for 3 days.
Preferably, the theoretical line loss calculation module includes:
the automatic calculation module is used for automatically allocating and calculating line loss to the trans-regional lines, calculating allocation proportion according to the electricity consumption of each trans-regional line, and automatically combining and calculating theoretical line loss to the looped network line, the trans-supply line, the cut-over line and the transformer area according to the load trans-supply system;
and the manual calculation module is used for manually configuring a merging plan of the looped network circuit, the switching supply circuit, the cutting circuit and the transformer area according to the self requirement and then calculating the theoretical line loss.
Preferably, the maintenance operation includes viewing, adding, modifying and deleting.
Preferably, the power 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 last year.
A theoretical line loss calculation method of a power distribution network is characterized by comprising the following steps:
providing a parameter import module for 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 daily line loss calculation rules and monthly line loss calculation rules;
providing a maintenance module for 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 load parameters; and
and providing a derivation module, and deriving the calculation result of the theoretical line loss calculation module.
The substantial effects of the invention are as follows: the method has the advantages of expanding the calculation and management range of the power distribution network, improving the calculation accuracy and the working efficiency of theoretical line loss, reducing the construction cost, being flexible in expansion, reducing the workload of line loss managers, effectively helping the managers to make correct decisions, and providing powerful support for the optimization design of a large-scale power network, the economical efficiency of the operation of a power system and the improvement of power supply quality.
Drawings
FIG. 1 is a block diagram of an embodiment of the present invention;
FIG. 2 is a flowchart of a method according to an embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following figures and embodiments:
as shown in fig. 1, a theoretical line loss calculation system for a power distribution network includes:
and the parameter importing module 11 imports physical parameters related to theoretical line loss calculation.
And the definition module 12 is used for defining a theoretical line loss calculation rule, wherein the theoretical line loss calculation rule comprises a daily line loss calculation rule and a monthly line loss calculation rule.
And the maintenance module 13 is used for performing maintenance operation on the physical parameters and the theoretical line loss calculation rule.
And the model establishing module 14 is used for establishing a theoretical line loss calculation model according to the physical parameters.
The theoretical line loss calculation module 15 is used for calculating theoretical line loss according to the theoretical line loss calculation rule, the theoretical line loss calculation model and the power load parameters; and
and a derivation module 16 for deriving 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, conductor model, resistivity, line length, resistance, total line resistance, feeder power supply radius, distribution transformation number of the segment, operating voltage, loss constant, correction system, data time, splitting number and whether line information maintenance can be performed.
Preferably, the station information physical parameters include organization, station number, station name, user number, user name, transformer name, line model, cooling mode, line loss rate, copper loss value, iron loss value, branch line length, station attribute, main line model, single-phase electric energy meter number, three-phase electric energy meter number, distribution and transformation capacity, power supply radius, load distribution and station load type.
Preferably, the daily electricity supply and sale meter code acquisition sequence rule is that the daily electricity quantity is calculated by taking a daily freezing meter code according to the metering system, and when the daily freezing meter code is missing, the daily electricity quantity is calculated by taking a zero-point daily freezing meter code; and when the day freezing table code and the zero day freezing table code are missing, the adjacent day freezing table code is taken to calculate the daily electric quantity.
The monthly line loss calculation rule is that monthly electric quantity is calculated according to a monthly freezing table code of the metering system, and the monthly electric quantity is calculated according to a zero month freezing table code when the monthly freezing table code is absent; and when the month freezing table code and the month-zero freezing table code are missing, the adjacent month freezing table code is taken to calculate the month electric quantity.
Preferably, the initial setting of the missing translation rule of the daily power supply and sales electricity meter codes is that the daily freezing meter codes translate for plus or minus 3 hours, and the daily freezing meter codes in the low-voltage area of the distribution area do not translate; the initial setting of the missing translation rule of the monthly electricity supply and sale meter codes is that the meter codes are frozen in the month and are translated for 3 days in a positive and negative mode.
Preferably, the theoretical line loss calculating module 15 includes:
and the automatic calculation module is used for automatically allocating and calculating line loss to the trans-regional lines, calculating allocation proportion according to the electricity consumption of each trans-regional line, and automatically combining and calculating theoretical line loss to the looped network line, the trans-supply line, the cut-over line and the transformer area according to the load trans-supply system.
And the manual calculation module is used for manually configuring a ring network line, a switching supply line, a cutting line and a station area merging plan according to the self requirement and then calculating the theoretical line loss.
Preferably, the maintenance operation includes viewing, adding, modifying and deleting.
Preferably, the power 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 last year.
Preferably, the derivation module 16 derives the calculation result of the theoretical line loss calculation module 15 in the form of a report. Through the generation of the report form, the theoretical line loss calculation result can be rapidly and comprehensively known, and the progress of follow-up work is facilitated.
Specifically, the theoretical line loss calculation rule and the calculation mode are as follows:
and selecting a typical representative month of which the last year is 9 months for theoretical line loss calculation, and calculating the theoretical line loss rate of the selected 10kV feeder line and 0.4kV transformer area according to the line loss calculation rule.
(1) 10kV feeder line:
the input electric quantity is the forward electric quantity of an examination and verification meter household of a transformer substation (feeder line), the forward electric quantity of an examination and verification meter household of the transformer substation (feeder line) is changed, the electric quantity of the examination and verification meter household of the transformer substation (feeder line) is deducted, the electric quantity is +10 (20) the electric quantity of a local power plant household on the internet is +10 (20) the electric quantity of a kV wholesale gateway household is + the reverse electric quantity of an examination and verification meter household of a region where 0.4kV photovoltaic is located;
the output electric quantity is the electric quantity of the public line special transformer household + the electric quantity of the special line special transformer household +10 (20) kV wholesale gateway household electric quantity + the electric quantity of the district examination meter household + the deduction electric quantity of the special line public transformer household.
Counter-power quantity (counter-power quantity) of checking meter family of transformer substation (feeder line)
Theoretical line loss rate = (input electric quantity-output electric quantity-back power supply quantity)/input electric quantity x 100%
(2) 0.4kV district:
input electric quantity is station area examination and check meter household electric quantity +0.4kV low-voltage local power station household electric quantity (including photovoltaic on-line electric quantity)
Output power (power consumption of charging pile in platform area)
Counter power supply amount is counter power amount of examination and check meter family in transformer area
Theoretical line loss rate = (input electric quantity-output electric quantity-back-supply electric quantity)/input electric quantity × 100%.
As shown in fig. 2, a method for calculating theoretical line loss of a power distribution network includes the following steps:
step S1: and providing a parameter importing module 11 for importing the physical parameters related to the theoretical line loss calculation.
Step S2: and providing a definition module 12 for defining a theoretical line loss calculation rule, wherein the theoretical line loss calculation rule comprises a daily line loss calculation rule and a monthly line loss calculation rule.
Step S3: and providing a maintenance module 13 for performing maintenance operation on the physical parameters and the theoretical line loss calculation rule.
Step S4: and providing a model establishing module 14 for establishing a theoretical line loss calculation model according to the physical parameters.
Step S5: and providing a theoretical line loss calculation module 15 for calculating the theoretical line loss according to the theoretical line loss calculation rule, the theoretical line loss calculation model and the power load parameters.
Step S6: a derivation module 16 is provided to derive the calculation result of the theoretical line loss calculation module 15.
The substantial effects of the invention are as follows: the method has the advantages of expanding the calculation and management range of the power distribution network, improving the calculation accuracy and the working efficiency of theoretical line loss, reducing the construction cost, being flexible in expansion, reducing the workload of line loss managers, effectively helping the managers to make correct decisions, and providing powerful support for the optimization design of a large-scale power network, the economical efficiency of the operation of a power system and the improvement of power supply quality.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
The invention is described above with reference to the accompanying drawings, which are illustrative, and it is obvious that the implementation of the invention is not limited in the above manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and technical solution, or to apply the inventive concept and technical solution to other fields without modification.
Claims (10)
1. A theoretical line loss calculation system for a power distribution network, comprising:
the parameter importing module imports physical parameters related to theoretical line loss calculation;
the system comprises a definition module, a calculation module and a calculation module, wherein the definition module defines theoretical line loss calculation rules which 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 rule;
the model establishing module is used for establishing a theoretical line loss calculation model according to the physical parameters;
the theoretical line loss calculation module is used for calculating theoretical line loss according to the theoretical line loss calculation rule, the theoretical line loss calculation model and the power load parameters; and
and the derivation module is used for deriving the calculation result of the theoretical line loss calculation module.
2. The system of claim 1, wherein the physical parameters comprise line information physical parameters and district information physical parameters.
3. The system of claim 2, wherein the physical parameters of the line information include organization, user name, feeder number, power supply path, conductor type, resistivity, line length, resistance, total line resistance, feeder power supply radius, distribution transformation number of segment, operating voltage, loss constant, revision system, data time, number of splits, and whether line information maintenance is possible.
4. The system of claim 2, wherein the district information physical parameters include organization, district number, district name, user number, user name, transformer name, line model, cooling mode, line loss rate, copper loss value, iron loss value, branch line length, district attribute, trunk line model, number of single-phase electric energy meters, number of three-phase electric energy meters, distribution capacity, power supply radius, load distribution, and district load type.
5. The system for calculating the theoretical line loss of the power distribution network according to claim 1, wherein the daily power supply and sale meter code acquisition sequence rule is that daily electric quantity is calculated by taking a daily freezing meter code according to a metering system, and when the daily freezing meter code is absent, the zero point is taken to calculate the daily electric quantity by the daily freezing meter code; when the daily freezing table code and the zero-point daily freezing table code are missing, calculating the daily electric quantity by taking the adjacent daily freezing table code;
the month line loss calculation rule is that the month electric quantity is calculated according to the month freezing table code of the metering system, and when the month freezing table code is missing, the month electric quantity is calculated according to the month freezing table code at zero point; and when the month freezing table code and the month freezing table code at the zero point are missing, taking the adjacent month freezing table code to calculate the month electric quantity.
6. The system for calculating the theoretical line loss of the power distribution network according to claim 5, wherein the initial setting of the missing translation rule of the daily power supply and sales meter codes is that the daily freezing meter codes are translated for plus or minus 3 hours, and the daily freezing meter codes in the low-voltage area of the transformer area are not translated; the initial setting of the monthly electricity supply and sale meter code missing translation rule is that the monthly electricity supply and sale meter codes are positively and negatively translated for 3 days.
7. The system of claim 1, wherein the theoretical line loss calculation module comprises:
the automatic calculation module is used for automatically allocating and calculating line loss to the trans-regional lines, calculating allocation proportion according to the electricity consumption of each trans-regional line, and automatically combining and calculating theoretical line loss to the looped network line, the trans-supply line, the cut-over line and the transformer area according to the load trans-supply system;
and the manual calculation module is used for manually configuring a merging plan of the looped network circuit, the switching supply circuit, the cutting circuit and the transformer area according to the self requirement and then calculating the theoretical line loss.
8. The system of claim 1, wherein the maintenance operations comprise review, addition, modification, and deletion.
9. The system of claim 1, wherein the electrical load parameters comprise voltage, current, active power, reactive power, power factor, maximum current, minimum current, head end voltage, tail end voltage, maximum load, minimum load, rated voltage, runtime, statistical line loss values, and theoretical line loss values for the last year.
10. A theoretical line loss calculation method of a power distribution network is characterized by comprising the following steps:
providing a parameter import module for 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 daily line loss calculation rules and monthly line loss calculation rules;
providing a maintenance module for 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 load parameters; and
and providing a derivation module, and deriving the calculation result of the theoretical line loss calculation module.
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| CN113687293A (en) * | 2021-07-28 | 2021-11-23 | 贵州电网有限责任公司 | Line loss abnormity intelligent analysis method based on big data |
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