CN104375000B - Calculation method for statistic line losses - Google Patents

Calculation method for statistic line losses Download PDF

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CN104375000B
CN104375000B CN201410659095.8A CN201410659095A CN104375000B CN 104375000 B CN104375000 B CN 104375000B CN 201410659095 A CN201410659095 A CN 201410659095A CN 104375000 B CN104375000 B CN 104375000B
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electric energy
energy meter
line
measured
collection period
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CN104375000A (en
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朱天博
傅军
孙志杰
陈洪涛
李雪梅
杨帆
杨一帆
许鑫
周国鹏
王鹏伍
方茂益
张艳丽
王莉
谢枫
张凌宇
刘晓伟
巩冬梅
程杰
牛逸宁
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State Grid Corp of China SGCC
North China Electric Power Research Institute Co Ltd
Electric Power Research Institute of State Grid Jibei Electric Power Co Ltd
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State Grid Corp of China SGCC
North China Electric Power Research Institute Co Ltd
Electric Power Research Institute of State Grid Jibei Electric Power Co Ltd
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Abstract

The invention provides a calculation method for statistic line losses. The method comprises the step of judging whether position-switched electric energy meters exist in all electric energy meters of user sides connected to a distributing line to be measured in a current acquisition cycle, the step of calculating statistic line loss contributions made by the position-switched electric energy meters to the distributing line to be measured in the current acquisition cycle, and the step of subtracting the statistic line loss contributions made by the position-switched electric energy meters to the distributing line to be measured in the current acquisition cycle and electric energy differences of non-position-switched electric energy meters in the current acquisition cycle from an electric energy difference of a total electric energy meter in the current acquisition cycle, dividing the final difference value by the electric energy difference of the total electric energy meter in the current acquisition cycle, and determining the obtained calculation result as the statistic line losses of the distributing line to be measured in the current acquisition cycle. Influences, caused by position switching of the electric energy meters among different distributing lines, on statistic line loss calculation are fully considered, the accuracy rate of the calculation result is high, the line loss management level is improved easily, and a reliable data support is provided for economical operation of a power system.

Description

A kind of computational methods of statistical line losses
Technical field
The present invention relates to technical field of electric power, in particular it relates to a kind of computational methods of statistical line losses.
Background technology
Line loss is the active power loss and energy loss produced in power network transmits assigning process.Statistical line losses are roots According to electric energy meter Index for Calculation line loss out.
Line loss is necessary problems faced during Operation of Electric Systems, and the management of line loss is transported to realizing power system economy Row is significant.From for State-level, strengthen Controlling line loss, national energy resource can be saved, respond national energy-saving The Major Strategic sex work of reduction of discharging;From for electrical network aspect, strengthening Controlling line loss can effectively reduce electrical network electric energy loss, reduce Electrical energy production transmission cost.Especially for the area of some electricity shortages, the reinforcement of Controlling line loss to a certain extent can be with Alleviate energy shortage problem, promote lasting national economy, coordination, steady development.
State's net is proposed unified sales service management system (SG186) within 2008, by the miscellaneous service in sales department Process and basic data has carried out the management of unified standard, purpose is intended to make sales department to standardization, Normalization.So And, mostly from power user power consumption information acquisition system, the system is only capable of obtaining at stoichiometric point the data in SG186 systems Related data, but in the calculating of statistical line losses, in addition to needing to obtain the data message at each stoichiometric point, also need to learn current The state and platform area information of each switch in circuit.Therefore current SG186 systems cannot be realized carrying out Line Loss of Distribution Network System automatically Ground, calculate exactly.
Only it is the electric energy to collection point when at present by SG186 systems and acquiring electric energy information system-computed statistical line losses Table data are simply added and subtracted, and do not account for the distribution line change that the change of Yin Tai areas and the factor such as dual power supply cause right Statistical line losses calculate the impact for producing.
(1) situation that platform area changes
For example shown in Fig. 1, platform area 1 covers electric energy meter M1,10kv distribution line 1 and section 1 of checking meter, and electric energy meter M1 matches somebody with somebody for 10kv Total electric energy meter of the transformer terminal of electric line 1 connection;Platform area 2 covers electric energy meter M2,10kv distribution line 2 and section 2 of checking meter, electric energy meter M2 is total electric energy meter of the transformer terminal of 10kv distribution lines 2 connection;M3, M4, M5, M6, M7, M8, M9, M10 are respectively user side Electric energy meter, wherein, section of checking meter 1 cover M3, M4, M5, M6, section of checking meter 2 cover M7, M8, M9, M10.
Counting statistics line loss need to gather the electric energy meter data of each user side, it is assumed that each user side in a collection period Electric energy meter difference be respectively △ M3, △ M4, △ M5, △ M6, △ M7, △ M8, △ M9, △ M10, prior art is directly by δ1= Statistics lines of [△ M1- △ M3- △ M4- △ M5- △ the M6]/△ M1 as the 10kV distribution lines 1 in collection period Nei Tai areas 1 Damage, but do not account for the situation that platform area during this changes.Such as M6 places subscribers' line during this period certain Moment is switched to platform area 2 from platform area 1, and from checking meter, section 1 is changed to section 2 of checking meter, and at this moment whole electricity of M6 is participated in calculating platform area 1 Line loss will cause result inaccurate.
(2) situation of dual power supply
For example shown in Fig. 2,10kv distribution lines 1 and 10kv distribution lines 2 are powered for user side jointly.The electric energy of user side Table is respectively M3, M4, M5, and under normal circumstances, S1, S2, S3 are off all in closure state, S4, by distribution line 1 Power supply.When electric energy meter M1 side line failures, S1 can be disconnected, close S4, be switched to and powered by 10kv distribution lines 2.
Before and after assuming a collection period, the electric energy difference of total electric energy meter M1 of the connection of 10kv distribution lines 1 is △ M1, electric The electric energy difference of energy table M3, M4, M5 is respectively △ M3, △ M4, △ M5, and prior art is directly by δ1=[△ M1- △ M3- △ M4- △ M5]/△ M1 as 10kV distribution lines 1 in the collection period statistical line losses.It can be seen that existing computational methods are not to various The method of operation is accounted for, and just for main power source simple statistical line losses calculating is carried out, when the circuit method of operation changes, Its result and actual value differ greatly.
To sum up, for 10kV power distribution networks, due to dual power supply, the adjustment of platform area is chaotic the problems such as, special system of power grid enterprises Often there is very large deviation in the line loss electricity counted in system and line loss per unit, this carries out not only bad for power grid enterprises with practical situation Controlling line loss works, and also the optimization of electrical network operation can be adversely affected.
The content of the invention
The main purpose of the embodiment of the present invention is to provide a kind of computational methods of statistical line losses, to solve existing statistics Line loss technology causes result of calculation inaccurate because not accounting for the distribution line change factor such as the change of platform area and dual power supply Problem.
To achieve these goals, the embodiment of the present invention provides a kind of computational methods of statistical line losses, comprises the steps:
In judging all electric energy meters of the interior user side being connected with distribution line to be measured of current collection period, if exist There is the electric energy meter of position switching between the distribution line to be measured and other distribution lines;
If so, then by the electric energy meter determination that position switching occurs between the distribution line to be measured and other distribution lines To switch electric energy meter, and the electric energy meter for position switching not occurring between the distribution line to be measured and other distribution lines is defined as Non-switching electric energy meter;
Determine electric energy difference of the switching electric energy meter in current collection period, and determine described in current collection period cutting Change operating time of the electric energy meter in the distribution line to be measured;
Calculate operating time and current collection period total duration of the switching electric energy meter in the distribution line to be measured Ratio, then electric energy difference of the switching electric energy meter in current collection period is multiplied by, the result of calculation for obtaining is defined as described Switching electric energy meter is contributed the statistical line losses of the distribution line to be measured in current collection period;
Determine electric energy difference of the non-switching electric energy meter in current collection period;
Determine the electric energy difference of total electric energy meter in current collection period of the distribution line transformer terminal connection to be measured;
Calculate total electric energy meter the electric energy difference of current collection period deduct it is described switching electric energy meter gather currently Electricity of the non-switching electric energy meter in current collection period is contributed and deducted to cycle to the statistical line losses of the distribution line to be measured Energy difference, then the result of calculation for obtaining is defined as into this and is treated in the electric energy difference of current collection period divided by total electric energy meter It is measured statistical line losses of the electric line in current collection period.
By means of above-mentioned technical proposal, the present invention has taken into full account electric energy meter in different distribution wires in counting statistics line loss Situation about switching between road, for switching electric energy meter, according to its working time in distribution line to be measured, calculates it to be measured The statistical line losses contribution of distribution line, compared to prior art, the present invention has taken into full account this part electric energy meter in different distribution Switch the impact caused by calculating statistical line losses between circuit, result of calculation accuracy rate is high, be conducive to improving Controlling line loss level, Reliable data are provided for Economical Operation of Power Systems to support.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below Needed for the accompanying drawing to be used be briefly described, it should be apparent that, drawings in the following description be only the present invention some Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can be with attached according to these Figure obtains other accompanying drawings.
Fig. 1 is the distribution line structural representation that the platform area that the present invention is provided changes;
Fig. 2 is the distribution line structural representation of the dual power supply that the present invention is provided;
Fig. 3 is the computational methods schematic flow sheet of the statistical line losses that the present invention is provided.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
The present invention provides a kind of computational methods of statistical line losses, as shown in figure 3, the method comprises the steps:
Step S31, in judging all electric energy meters of the interior user side being connected with distribution line to be measured of current collection period, With the presence or absence of the electric energy meter that position switching occurs between the distribution line to be measured and other distribution lines, if so, then execution step S32。
Specifically, certain distribution line can connect the electric energy meter of many user sides in a collection period, but when meter When calculating statistical line losses, some electric energy meters therein may be had been switched on other distribution lines, or some electric energy therein Table switches from other distribution lines, and the present invention has taken into full account this part electric energy meter between different distribution lines Position switches the impact caused to statistical line losses calculating.
In a kind of preferred embodiment, step S31 specifically can be obtained by sales service management system SG186 The annexation of electric energy meter and distribution line to be measured in current collection period;And the distribution line to be measured is judged according to annexation In all electric energy meters of the user side connected in current collection period, if there is the electric energy meter that position switching occurred.
SG186 systems by sales service be divided into " customer service and customer relationship ", " electricity bill control ", " electric energy metrical and 4 business scopes such as information gathering " and " market and Demand-side " and " integrated management ".It is divided into new clothes increase-volume and change electricity consumption, copies Table management, accounting management, electric fees charging and financial management, Controlling line loss, stoichiometric point management, asset management, measuring system management, Acquiring electric energy information, contract for the supply and use of electricity management, power utility check management, customer relation management, client contact, marketing management, 95598 Business Processing, ordered electric management, energy efficiency management, inspection and work quality, customer profile data management etc., totally 19 business Class, 137 traffic items and 753 business subitems.System is shared out the work and helped one another by the concrete business in each field, provides all kinds of for client Service, completes all kinds of Business Processings, and for the management of power supply enterprise, operation and decision-making support is provided;Meanwhile, by sales service with The orderly cooperation of other business, can further improve the sharing degree of whole power grid enterprises' resource.
Can be called in national grid data base about the information and data of circuit by SG186 systems.Log in SG186 systems System homepage, is checked meter the Back ground Information of section by checking transformer station, circuit, Tai Qu, Electricity customers, confirms transformer station, circuit, Tai Qu Between corresponding relation, confirm the corresponding relation of circuit and section of checking meter, platform area and section of checking meter;In line loss management module, Ke Yicha See the information such as line loss Basic Information Management, examination Single Component Management, line loss managing electric quantity, line loss statistics, line loss exception management.
Step S32, the electric energy meter that position switching occurs between the distribution line to be measured and other distribution lines is defined as Switching electric energy meter, and the electric energy meter that position switching does not occur between the distribution line to be measured and other distribution lines is defined as non- Switching electric energy meter.
Specifically, if in current collection period, distribution line to be measured connects all electric energy meters of user side, does not exist There is position switching between the distribution line to be measured and other distribution lines, then in current collection period, distribution line connects The all electric energy meters for connecing user side are confirmed as non-switching electric energy meter.
Step S33, it is determined that electric energy difference of the switching electric energy meter in current collection period, and determine current collection period inscribe Change operating time of the electric energy meter in the distribution line to be measured.
Specifically, electric energy difference is the data and collection period start time electric energy meter of collection period finish time electric energy meter The difference of data.
In a kind of preferred embodiment, step S33 specifically can obtain current collection by distribution automation system Operating time of the switching electric energy meter in the distribution line to be measured in cycle.
The original intention that distribution automation system is proposed is to improve controling power of the electric power enterprise to bulk power grid, strengthens troop Specialized, intensive management level.The system utilizes computer, communication and information technology, effectively to the real-time fortune of power distribution network Row, electric network composition, equipment, user carry out automated management, while power supply quality and the efficiency of management is improved, are greatly reduced Demand to bottom manpower.The task of distribution system automation mainly includes:Integrated SCADA and GIS functions;Distribution management system System;Outage Management Systems;Demand Side Response;Dispatching automation function;Distributed power generation is managed.Distribution automation system typically by Following sections:Distribution main website, with electronic station (setting up in transformer station, can match), distribution terminal unit (FTU, DTU, TTU Deng) and communication network.Under normal circumstances, distribution automation system is capable of achieving to each operation electrical parameter (including feedback built-in unit Various electricity) a distant place measurement, monitoring and equipment state a distant place control.
In Stateful Inspection, event logging module in distribution automation system, search the communication information, load transinformation and Accident report archive information, with reference to the circuit diagram of distribution line, you can calculate the position of the Tiao Tai areas operation and operating time, double Power supply is powered the circuit diagram for cut-offfing state and operating time, drawing each line status of two-termial line.With reference to SG186 systems With the information such as acquiring electric energy information system Zhong Tai area, electric flux, the working time of each line status is obtained, obtain electric energy meter The data such as the electricity worked respectively under each line status, to calculate the loss on every distribution line.
Step S34, when operating time of the calculating switching electric energy meter in the distribution line to be measured is total with current collection period Long ratio, then electric energy difference of the switching electric energy meter in current collection period is multiplied by, the result of calculation for obtaining is defined as into switching Electric energy meter is contributed the statistical line losses of the distribution line to be measured in current collection period.
Specifically, the present invention, according to its working time in the distribution line to be measured, calculates it for switching electric energy meter The statistical line losses of the distribution line to be measured are contributed, the present invention has been fully demonstrated and has been considered switching electric energy meter in different distribution lines Between position switch to statistical line losses calculate caused by impact.
Step S35, determines electric energy difference of the non-switching electric energy meter in current collection period.
Specifically, because non-switching electric energy meter is only connected in current collection period with the distribution line to be measured, and do not have It is switched to other distribution lines up, therefore only needs to consider electric energy difference of the non-switching electric energy meter in current collection period.
Step S36, determines the electric energy of total electric energy meter in current collection period of the distribution line transformer terminal connection to be measured Difference.
Step S37, the total electric energy meter of calculating deducts switching electric energy meter and gathers currently in the electric energy difference of current collection period Cycle, the statistical line losses of the distribution line to be measured were contributed and to deduct non-switching electric energy meter poor in the electric energy of current collection period Value, then the result of calculation for obtaining is defined as into the distribution wire to be measured in the electric energy difference of current collection period divided by total electric energy meter Statistical line losses of the road in current collection period.
The present invention has taken into full account the feelings of electric energy meter position switching between different distribution lines in counting statistics line loss Condition, for switching electric energy meter, according to its working time in distribution line to be measured, calculates it and treats the statistics for being measured electric line Line loss is contributed, and compared to prior art, the present invention has taken into full account that this part electric energy meter switches to system between different distribution lines Impact caused by meter line loss calculation, result of calculation accuracy rate is high, is conducive to improving Controlling line loss level, is power system economy Operation provides reliable data supporting.
In a kind of preferred embodiment, the present invention can be by power user power consumption information acquisition system, it is determined that currently The time started and end time of collection period.
To ensure that the specification of intelligent grid construction is carried out, national grid was proposed power consumer electricity consumption information and adopts in 2008 Collecting system.By setting up unified main website, acquisition terminal, communication unit, unified and standard form structure, performance refer to the system Mark, communication protocol, safety certification, operation management etc., are capable of achieving metering device and monitor on-line, power consumer important information (electricity, Voltage, electric current etc.) automatic data collection.Used as the main information supplier of " SG186 " system, information acquisition system can be timely, accurate Really, intactly for SG186 information systeies basic data is provided, is that company manager is analyzed to each process of operation, decision-making is carried Effective support is supplied.
Through the high speed development of several years, power information acquisition system was capable of achieving " covering entirely to some areas power information Lid, full collection ", the automaticity of the business such as electric energy metrical, automatic data logging, pre-payment management is also obviously improved.For Enterprise further realizes that intensive, lean, standardized management are laid a good foundation.
Acquiring electric energy information system is logged in, in power information collection and real-time monitoring module, is searched at each collection point The data such as total electric flux, voltage, electric current, active power, reactive power, power factor.According to different acquisition point to gathering number According to requirement, confirm acquisition target, gathered data item, collection period, execution priority, the collection information such as beginning and ending time, and manage The execution of various acquisition tasks is managed, tasks carrying situation is checked.
Embodiment one
As shown in figure 1, in a certain collection period, because distribution line changes, electric energy meter M6 is switched to from platform area 1 Platform area 2, i.e., be switched to 10kv distribution lines 2 from 10kv distribution lines 1, if in the collection period, electric energy meter M6 works in platform area 1 Time be T1, before and after being T2, and the collection period in the time of the work of platform area 2, the electric energy difference of total electric energy meter M1 is △ M1, The electric energy difference of electric energy meter M3, M4, M5, M6 is respectively △ M3, △ M4, △ M5, △ M6, Ze Tai areas 1 (10kv distribution lines 1) Statistical line losses δ1For:
δ1=[△ M1- △ M3- △ M4- △ M5- △ M6 × T1/ (T1+T2)]/△ M1
Embodiment two
As shown in Fig. 2 under normal circumstances, S1, S2, S3 are in closure state, and S4 is off, by distribution line 1 Power supply.In a certain collection period, 10kv distribution lines 1 break down, and S1 disconnects, S2, S3, S4 closure, by 10kv distribution wires Road 2 individually powers, it is assumed that in the collection period, the working time of electric energy meter M3, M4, M5 of user side in 10kv distribution lines 1 For T1, before and after being T2, and the collection period in the working time of 10kv distribution lines 2, total electric energy of the connection of 10kv distribution lines 1 The electric energy difference of table M1 is △ M1, and the electric energy difference of electric energy meter M3, M4, M5 is respectively △ M3, △ M4, △ M5, then 10kv distribution The statistical line losses δ of circuit 11For:
δ1=[△ M1-(△ M3+ △ M4+ △ M5) × T1/ (T1+T2)]/△ M1
Line loss is necessary problems faced during Operation of Electric Systems, and the management of line loss is transported to realizing power system economy Row is significant.From for State-level, strengthen Controlling line loss, national energy resource can be saved, respond national energy-saving The Major Strategic sex work of reduction of discharging;From for electrical network aspect, strengthening Controlling line loss can effectively reduce electrical network electric energy loss, reduce Electrical energy production transmission cost.Especially for the area of some electricity shortages, the reinforcement of Controlling line loss can delay to a certain extent Solution energy shortage problem, promotes lasting national economy, coordination, steady development.
Currently, also there are problems in grid line loss management work, and Controlling line loss level has much room for improvement.Particularly in town and country In power distribution network, because electric power meter is not accurate enough, the problems such as Controlling line loss consciousness is thin, the Controlling line loss water in many places It is flat also relatively backward.For 10kV power distribution networks, due to dual power supply, the adjustment of platform area is chaotic the problems such as, special system of power grid enterprises Often there is very large deviation in the line loss electricity counted in system and line loss per unit, this carries out not only bad for power grid enterprises with practical situation Controlling line loss works, and also the optimization of electrical network operation can be adversely affected.
The computational methods of statistical line losses proposed by the present invention are a kind of integrated application SG186 systems, data collecting system, match somebody with somebody The method of automation system counting statistics line loss, can integrate each system information, be prevented effectively from caused line in practical operation Not statistical uncertainty true problem is damaged, Controlling line loss level is improved, reliable data is provided for Economical Operation of Power Systems and is supported.
Specific embodiment above, has been carried out further specifically to the purpose of the present invention, technical scheme and beneficial effect It is bright, should be understood that and these are only specific embodiment of the invention, the protection domain being not intended to limit the present invention, All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc., should be included in the present invention's Within protection domain.

Claims (4)

1. a kind of computational methods of statistical line losses, it is characterised in that comprise the steps:
In judging all electric energy meters of the interior user side being connected with distribution line to be measured of current collection period, if exist at this There is the electric energy meter of position switching between distribution line to be measured and other distribution lines;
If so, then by it is described between the distribution line to be measured and other distribution lines occur position switching electric energy meter be defined as cutting Electric energy meter is changed, and the electric energy meter for position switching not occurring between the distribution line to be measured and other distribution lines is defined as into non-cutting Change electric energy meter;
Determine electric energy difference of the switching electric energy meter in current collection period, and determine the switching electricity in current collection period Can operating time of the table in the distribution line to be measured;
The ratio of operating time of the switching electric energy meter in the distribution line to be measured and current collection period total duration is calculated, Electric energy difference of the switching electric energy meter in current collection period is multiplied by again, and the result of calculation for obtaining is defined as into the switching electricity Can statistical line losses contribution of the table in current collection period to the distribution line to be measured;
Determine electric energy difference of the non-switching electric energy meter in current collection period;
Determine the electric energy difference of total electric energy meter in current collection period of the distribution line transformer terminal connection to be measured;
Calculate total electric energy meter and deduct the switching electric energy meter in current collection period in the electric energy difference of current collection period To the contribution of the statistical line losses of the distribution line to be measured and to deduct the non-switching electric energy meter poor in the electric energy of current collection period Value, then the result of calculation for obtaining is defined as into this and waits to be measured in the electric energy difference of current collection period divided by total electric energy meter Statistical line losses of the electric line in current collection period.
2. computational methods of statistical line losses according to claim 1, it is characterised in that also include:
By sales service management system SG186, the annexation of electric energy meter and distribution line in current collection period is obtained;
All electricity of the user side for judging to be connected with the distribution line to be measured in current collection period according to the annexation In energy table, if there is the electric energy meter that position switching occurs between the distribution line to be measured and other distribution lines.
3. computational methods of statistical line losses according to claim 1, it is characterised in that also include:
By distribution automation system, work of the switching electric energy meter in the distribution line to be measured in current collection period is obtained Make duration.
4. computational methods of statistical line losses according to claim 1, it is characterised in that also include:
By power user power consumption information acquisition system, it is determined that the time started and end time of current collection period.
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