CN104698269B - A kind of transformer transformation is front and rear to save quantity of electricity measuring and calculating device and measuring method - Google Patents
A kind of transformer transformation is front and rear to save quantity of electricity measuring and calculating device and measuring method Download PDFInfo
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Abstract
Disclose a kind of front and rear quantity of electricity of saving of transformer transformation and calculate device and measuring method, belong to transformer renovation technique field.The device includes active energy acquisition module, capacity of idle power acquisition module, average voltage acquisition module, collection period setting module, project cycle setting module, average current computing module, short circuit loss electricity computing module, open circuit loss electricity computing module, saving electricity computing module.This method includes calculating the active energy of transformer in collection period；Calculate the capacity of idle power of transformer in collection period；Computing obtains average voltage；Set collection period；The setting item cycle；Computing obtains flowing through the average current of transformer in collection period；Computing obtains the short circuit loss electricity of transformer in the project cycle；Computing obtains the open circuit loss electricity of transformer in the project cycle；Computing obtains saving electricity.It can calculate to obtain the front and rear saving electricity of transformer transformation by the apparatus and method.
Description
Technical field
The present invention relates to transformer renovation technique field, more particularly to a kind of front and rear quantity of electricity of saving of transformer transformation is surveyed
Calculate device and measuring method.
Background technology
With the influence of the factors such as China's rapid economic development and economic restructuring, China's power structure and supply and demand shape
Gesture constantly changes, and power network peak load maintains sustained and rapid growth, and peak-valley difference increase, the requirement of power supply reliability improves constantly.
2011, National Development and Reform Committee printed and distributed《Power grid enterprises implement demand Side Management target responsibility check scheme (tentative)》,
Ask and establish and improve power grid enterprises' demand Side Management target responsibility evaluation and check-up system, it is ensured that realize and save quantity of electricity
0.3% index.Because the Energy Saving Industry in China is also in the stage at initial stage, lack unified, effective saving electric power electricity at present
Measuring method.In power grid enterprises' Energy-saving Projects transformation, high damage transformer transformation account for significant proportion, therefore need design department badly
Learn rational transformer transformation and save quantity of electricity measuring method.
In order to solve the above problems, application publication number is that CN103018584A Chinese invention patent application discloses one kind
Measurement and the verification method of electric power and electricity are saved for electric power boosting and transformation.Before and after it is by measure the item border boosting and transformation
Parameter computational item purpose save electric power and electricity, provide reliable basis for energy saving profit.Method includes step：1) electric power boosts
Item boundaries delimited before transformation；2) identify project the statistical report phase；3) element identified project in border before and after boosting and transformation is quiet
State parameter, change the dynamic operation parameter after original text using boosting in test equipment collection item boundaries；4) establish and save electric power and electricity
The mathematical modeling of amount, computational item purpose save electric power and electricity.
But this be used for electric power boosting and transformation save the measurement of electric power and electricity and verification method needs transformer height,
Low-pressure side is respectively mounted metering device.And in the transformer improvement project of reality, transformer generally only can be in transformer high and low pressure
A set of metering device is installed in side therein, also, the installation position of metering device will not be reserved in offside, therefore, if should
The measurement that electric power and electricity are saved for electric power boosting and transformation is applied in transformer improvement project with verification method, it is also necessary to right
Transformer carries out larger modification in itself, otherwise, it is difficult to implements in transformer improvement project.
The content of the invention
It is above-mentioned in order to solve, before the present invention proposes a kind of transformer transformation that can implement in transformer improvement project
Quantity of electricity measuring and calculating device and measuring method are saved afterwards.
The front and rear quantity of electricity measuring and calculating device of saving of transformer transformation provided by the invention includes active energy acquisition module, nothing
Work(electricity acquisition module, average voltage acquisition module, collection period setting module, project cycle setting module, average current fortune
Calculate module, short circuit loss electricity computing module, open circuit loss electricity computing module, the front and rear saving electricity computing module of transformation；
The active energy acquisition module is used for the active energy W for obtaining transformer in collection periodThere is i；
The capacity of idle power acquisition module is used for the capacity of idle power W for obtaining transformer in collection periodWithout i；
The average voltage acquisition module be used for obtain the last moment in collection period transformer high-low-voltage bus or
The instantaneous voltage U of low-voltage bus bari, union obtains average voltage in each collection period
The collection period setting module is used to set collection period TAdopt；
The project cycle setting module is used for setting item cycle T；
The average current computing module is according to formulaComputing obtains flowing through in collection period
The average current of transformer
The short circuit loss electricity computing module is according to formulaComputing obtains item
The short circuit loss electricity W of transformer in the mesh cycleIt is short；
The open circuit loss electricity computing module is according to formula WIt is empty=PIt is empty·TComputing obtains transformer in the project cycle
Open circuit loss electricity WIt is empty；
The front and rear electricity computing module of saving of the transformation is according to formula WSave electricity=WBefore short-WAfter short+WUnprecedentedly-WAfter skyComputing is become
Depressor transformation is front and rear to save electricity；
Wherein, the measurement unit of each physical quantity is international unit in above-mentioned each formula.
Preferably, also include peak load acquisition module and the front and rear saving electric power computing module of transformation, it is described maximum negative
Lotus acquisition module is used for the peak power S for obtaining transformer in the project cyclemax；The transformation is front and rear to save electric power computing module
According to formulaComputing obtains transformer transformation
Front and rear saving electric power PSave electric power。
Preferably, also include Analysis of energy metering unit, data acquisition unit, first communication module and the second communication mould
Block, quantitative analysis unit and outlet terminal, the Analysis of energy metering unit include current transformer, voltage transformer and electric energy
Table；Each module is configured in the quantitative analysis unit；
The current transformer is used for the electric current for measuring the high and low pressure bus for flowing through transformer, and the electric current number that will be measured
According to being sent to the electric energy meter；
The voltage that the voltage transformer is used between measuring transformer high and low pressure bus, and the voltage data that will be measured
It is sent to the electric energy meter；
The electric energy meter calculates according to the current data and voltage data that receive according to P=U × I × cos Φ
To energy data；
The first communication module is arranged on the electric energy meter side, and the second communication module is arranged on the data
Collecting unit side, the electric energy meter is by the communication between the first communication module and second communication module, by the electricity
Energy data are sent to the data acquisition unit；
The energy data that the quantitative analysis unit collects according to the data acquisition unit, is calculated transformer and changes
Make front and rear saving quantity of electricity；
The outlet terminal is used to export the front and rear saving quantity of electricity of transformer transformation；
Wherein,
P-electrical power/W, U-voltage/V, I-electric current/A, the phase angle between Φ-U and I.
Preferably, the data acquisition unit, quantitative analysis unit, outlet terminal are two part arrangement.
Preferably, the data acquisition unit, quantitative analysis unit are integrated form device, the outlet terminal with it is described
Split between the data acquisition unit that integrates, quantitative analysis unit.
Preferably, the quantitative analysis unit, outlet terminal are integrated form device, the data acquisition unit with it is described
Split between the quantitative analysis unit that integrates, outlet terminal.
Preferably, carried out data transmission between the quantitative analysis unit and the outlet terminal by Bluetooth technology.
Connect preferably, being respectively equipped with wired or wireless remote on the quantitative analysis unit and the outlet terminal
Mouthful, the quantitative analysis unit is carried out data transmission by the remote interface.
The front and rear quantity of electricity measuring method of saving of transformer transformation provided by the invention comprises the following steps：
Calculate the active energy W of transformer in collection periodThere is i；
Calculate the capacity of idle power W of transformer in collection periodWithout i；
According to the real-time voltage U between the transformer high and low pressure bus in collection periodi, union obtains average voltage
Set collection period TAdopt；
Setting item cycle T；
According to formulaComputing obtains flowing through the average current of transformer in collection period
According to formulaComputing obtains the short circuit loss of transformer in the project cycle
Electricity WIt is short；
According to formula WIt is empty=PIt is empty·TComputing obtains the open circuit loss electricity W of transformer in the project cycleIt is empty；
According to formula WSave electricity=WBefore short-WAfter short+WUnprecedentedly-WAfter skyComputing obtains the front and rear saving electricity of transformer transformation；
Wherein, the measurement unit of each physical quantity is international unit in above-mentioned each formula.
10th, transformer transformation according to claim 9 is front and rear saves quantity of electricity measuring method, it is characterised in that
Also include the peak power S for obtaining transformer in the project cyclemaxThe step of and computing obtain that transformer transformation is front and rear to save electric power
The step of,
According to formulaComputing is become
Depressor transformation is front and rear to save electric power PSave electric power。
The front and rear W saved in quantity of electricity measuring and calculating device of transformer transformation provided by the inventionThere is iIt is by (TAdoptThe active electricity in end
Can the table truth of a matter-TAdoptThe first active electric energy meter truth of a matter) × CT, PT variable quantity obtains；WWithout iIt is by (TAdoptThe last reactive energy-meter truth of a matter-TAdopt
The first reactive energy-meter truth of a matter) × CT, PT variable quantity obtains；The P of transformer before transformationIt is empty、PIt is short, Se, the P of transformer after transformationIt is empty、
PIt is short, Se be all to be obtained according to the nameplate parameter of transformer；Remaining each parameter is all that each module is obtained by the formula operation provided,
Therefore, using transformer provided by the invention transform it is front and rear save quantity of electricity measuring and calculating device can automatic measurement ＆ calculation go out transformer and change
Make front and rear saving electricity.
The front and rear W saved in quantity of electricity measuring method of transformer transformation provided by the inventionThere is iIt is by (TAdoptThe active electricity in end
Can the table truth of a matter-TAdoptThe first active electric energy meter truth of a matter) × CT, PT variable quantity obtains；WWithout iIt is by (TAdoptThe last reactive energy-meter truth of a matter-TAdopt
The first reactive energy-meter truth of a matter) × CT, PT variable quantity obtains；The P of transformer before transformationIt is empty、PIt is short, Se, the P of transformer after transformationIt is empty、
PIt is short, Se be all to be obtained according to the nameplate parameter of transformer；Remaining each parameter is obtained by the formula operation provided, therefore,
Front and rear save before and after quantity of electricity measuring method can calculate transformer transformation is transformed using transformer provided by the invention to save
About electricity.
Brief description of the drawings
Fig. 1 is that the front and rear quantity of electricity of saving of transformer provided in an embodiment of the present invention transformation is calculated in device between each module
Signal flow to relation schematic diagram；
Fig. 2 is the front and rear additional firmware dress saved quantity of electricity and calculate device of transformer provided in an embodiment of the present invention transformation
The connection relationship diagram put；
Fig. 3 is between the front and rear saving each step of quantity of electricity measuring method of transformer provided in an embodiment of the present invention transformation
Incidence relation schematic diagram.
Embodiment
In order to understand the present invention in depth, below in conjunction with the accompanying drawings and specific embodiment the present invention is described in detail.
Embodiment one
Referring to accompanying drawing 1, the front and rear quantity of electricity measuring and calculating device of saving of transformer transformation provided by the invention includes active energy
Acquisition module, capacity of idle power acquisition module, average voltage acquisition module, collection period setting module, project cycle setting module,
Average current computing module, short circuit loss electricity computing module, open circuit loss electricity computing module, the front and rear saving electric power electricity of transformation
Measure computing module；Active energy acquisition module is used for the active energy W for obtaining transformer in collection periodThere is i；Capacity of idle power obtains
Module is used for the capacity of idle power W for obtaining transformer in collection periodWithout i；Average voltage acquisition module is used to obtain in collection period
The transformer high-low-voltage bus of last moment or the instantaneous voltage U of low-voltage bus bari, union obtains average in each collection period
VoltageCollection period setting module is used to set collection period TAdopt；Project cycle setting module is used for the setting item cycle
T；Average current computing module is according to formulaComputing obtains flowing through the flat of transformer in collection period
Equal electric currentShort circuit loss electricity computing module is according to formulaComputing obtains project
The short circuit loss electricity W of transformer in cycleIt is short；Open circuit loss electricity computing module is according to formula WIt is empty=PIt is empty·TComputing obtains item
The open circuit loss electricity W of transformer in the mesh cycleIt is empty；The front and rear electricity computing module of saving of transformation is according to formula WSave electricity=WBefore short-WAfter short
+WUnprecedentedly-WAfter skyComputing obtains the front and rear saving quantity of electricity W of transformer transformationSave electricity.Wherein, in above-mentioned each formula each physical quantity meter
It is international unit to measure unit.Now, transformer is carried out transformation be not related to transformer carry out increase-volume.
The front and rear W saved in quantity of electricity measuring and calculating device of transformer transformation provided by the inventionThere is iIt is by (TAdoptThe active electricity in end
Can the table truth of a matter-TAdoptThe first active electric energy meter truth of a matter) × CT, PT variable quantity obtains；WWithout iIt is by (TAdoptThe last reactive energy-meter truth of a matter-TAdopt
The first reactive energy-meter truth of a matter) × CT, PT variable quantity obtains；The P of transformer before transformationIt is empty、PIt is short, Se, the P of transformer after transformationIt is empty、
PIt is short, Se be all to be obtained according to the nameplate parameter of transformer；Remaining each parameter is all that each module is obtained by the formula operation provided,
Therefore, using transformer provided by the invention transform it is front and rear save quantity of electricity measuring and calculating device can automatic measurement ＆ calculation go out transformer and change
Make front and rear saving quantity of electricity.
Wherein, collection period TAdoptGenerally 15min or 24h.Project cycle TGenerally 1 year.
Wherein, the front and rear quantity of electricity measuring and calculating device of saving of transformer transformation provided by the invention can also include peak load
Acquisition module and the front and rear saving electric power computing module of transformation, peak load acquisition module are used to obtain transformer in the project cycle
Peak power Smax；The front and rear electric power computing module of saving of transformation is according to formula
Computing is obtained before and after transformer transformation
Save electric power PSave electric power.Now, when transforming transformer, increase-volume is also carried out in itself to transformer simultaneously.
Referring to accompanying drawing 2, the front and rear quantity of electricity measuring and calculating device of saving of transformer transformation also includes Analysis of energy metering unit, number
According to collecting unit, first communication module and second communication module, quantitative analysis unit and outlet terminal, Analysis of energy metering unit
Including current transformer, voltage transformer and electric energy meter；Each module is configured in quantitative analysis unit；Current transformer is used to survey
Amount flows through the electric current of the high and low pressure bus of transformer, and the current data measured is sent into electric energy meter；Voltage transformer is used for
The voltage of measuring transformer high voltage bus or low-voltage bus bar, and the voltage data measured is sent to electric energy meter；Electric energy meter root
Energy data is calculated according to P=U × I × cos Φ according to the current data and voltage data received；First communication module is set
Put in electric energy meter side, second communication module is arranged on data acquisition unit side, and electric energy meter passes through first communication module and
Communication between two communication modules, energy data is sent to data acquisition unit；Quantitative analysis unit is according to data acquisition list
The energy data that member collects, the front and rear saving quantity of electricity of transformer transformation is calculated；Outlet terminal is used to export transformer
Transformation is front and rear to save quantity of electricity；Wherein, P-electrical power/W, U-voltage/V, I-electric current/A, the phase angle between Φ-U and I.
Now, the front and rear quantity of electricity measuring and calculating device of saving of transformer transformation can obtain energy data by electric energy meter, by being arranged on
The first communication module of electric energy meter side and the communication being arranged between the second communication module of data acquisition unit side, data
Collecting unit can collect energy data, and according to the energy data, staff can transform transformer front and rear saving electricity
Power electricity is calculated.Without being respectively mounted metering device in transformer high and low pressure side.Therefore, it is easy in transformer improvement project
Middle implementation.
In the present embodiment, data acquisition unit, quantitative analysis unit, outlet terminal are two part arrangement.Using split
The advantages of formula device, is that data acquisition unit, quantitative analysis unit and outlet terminal can be purchased individually, individually designed, when
When one of device needs to change or repaired, it is conveniently replaceable or repairs；The disadvantage is that, using when need simultaneously from three
Individual two part arrangement, installation inconvenience.
Embodiment two
The front and rear difference for saving quantity of electricity measuring and calculating device of transformer transformation provided with the embodiment of the present invention one exists
In the front and rear quantity of electricity of saving of transformer transformation that the embodiment of the present invention two provides is calculated in device, data acquisition unit, meter
Amount analytic unit is integrated form device, is divided between outlet terminal and the data acquisition unit integrated, quantitative analysis unit
Body.Now, the data acquisition unit in the device of three splits originally and quantitative analysis unit are integrated, reduces one
Individual device, quantity of electricity measuring and calculating device of saving front and rear compared with the transformer transformation that the embodiment of the present invention two provides is installed and is more convenient, and
And it is subsequently through bluetooth due to split between outlet terminal and the data acquisition unit integrated, quantitative analysis unit
Technology or remote interface make transmission of the data between quantitative analysis unit and outlet terminal reserve space.
Embodiment three
The front and rear saving quantity of electricity measuring and calculating device of transformer transformation provided with the embodiment of the present invention one and embodiment two is equal
Difference, transformer transformation that the embodiment of the present invention three provides is front and rear to save in quantity of electricity measuring and calculating device, quantitative analysis unit, defeated
It is integrated form device to go out terminal, split between data acquisition unit and the quantitative analysis unit integrated, outlet terminal.This
When, the data acquisition unit in the device of three splits originally and quantitative analysis unit are integrated, reduce a dress
Put, quantity of electricity measuring and calculating device of saving front and rear compared with the transformer transformation that the embodiment of the present invention one provides is installed and is more convenient.
Example IV
Carried out in front and rear save on the basis of quantity of electricity calculates device of the transformer transformation that the embodiment of the present invention two provides
Improve, the transformer transformation that the embodiment of the present invention four provides is front and rear to save in quantity of electricity measuring and calculating device, quantitative analysis unit and
Carried out data transmission between outlet terminal by Bluetooth technology.So as to eliminate between quantitative analysis unit and outlet terminal
Connection line so that the front and rear line for saving quantity of electricity measuring and calculating device of transformer transformation that the embodiment of the present invention five provides is more
Simply, it is easier for installation.
It is carried the disadvantage is that, because Bluetooth technology is a kind of short-distance wireless communication technology using the embodiment of the present invention four
The transformer transformation of confession is front and rear when saving quantity of electricity measuring and calculating device, it is necessary to which staff is read before and after transformer transforms to scene
Save quantity of electricity calculation of measured data.Sometimes, can be to the person of staff because the natural environment residing for transformer is severe
Safety threatens.
Embodiment five
Carried out in front and rear save on the basis of quantity of electricity calculates device of the transformer transformation that the embodiment of the present invention two provides
Improve, the transformer transformation that the embodiment of the present invention five provides is front and rear to save in quantity of electricity measuring and calculating device, quantitative analysis unit and
Wired or wireless remote interface is respectively equipped with outlet terminal, quantitative analysis unit is carried out data transmission by remote interface.
Now, staff need not save quantity of electricity calculation of measured data to reading transformer transformation in scene is front and rear, and only need controlling
It can complete to read front and rear the saving quantity of electricity calculation of measured data of the task of transformer transformation in room.
In addition,
Specifically, wire communication is used between first communication module and second communication module；Or first communication module and
Radio communication is used between second communication module.
More specifically, the communication protocol between first communication module and second communication module selects work(more than DL/645-2007
Can electric energy meter communication protocol.Defined in the communication protocol multifunctional electric energy meter and handheld unit or other data terminal equipments it
Between physical connection, communication link and application technology specification.
The front and rear quantity of electricity measuring method of saving of transformer transformation provided by the invention comprises the following steps：
Calculate the active energy W of transformer in collection periodThere is i；
Calculate the capacity of idle power W of transformer in collection periodWithout i；
According to the real-time voltage U between the transformer high and low pressure bus in collection periodi, union obtains average voltage
Set collection period TAdopt；
Setting item cycle T；
According to formulaComputing obtains flowing through the average current of transformer in collection period
According to formulaComputing obtains the short circuit loss of transformer in the project cycle
Electricity WIt is short；
According to formula WIt is empty=PIt is empty·TComputing obtains the open circuit loss electricity W of transformer in the project cycleIt is empty；
According to formula WSave electricity=WBefore short-WAfter short+WUnprecedentedly-WAfter skyComputing obtains the front and rear saving electricity of transformer transformation.
Wherein, the measurement unit of each physical quantity is international unit in above-mentioned each formula.
Now, transformer is carried out transformation be not related to transformer carry out increase-volume.
The front and rear W saved in quantity of electricity measuring method of transformer transformation provided by the inventionThere is iIt is by (TAdoptThe active electricity in end
Can the table truth of a matter-TAdoptThe first active electric energy meter truth of a matter) × CT, PT variable quantity obtains；WWithout iIt is by (TAdoptThe last reactive energy-meter truth of a matter-TAdopt
The first reactive energy-meter truth of a matter) × CT, PT variable quantity obtains；The P of transformer before transformationIt is empty、PIt is short, Se, the P of transformer after transformationIt is empty、
PIt is short, Se be all to be obtained according to the nameplate parameter of transformer；Remaining each parameter is obtained by the formula operation provided, therefore,
Front and rear save before and after quantity of electricity measuring method can calculate transformer transformation is transformed using transformer provided by the invention to save
About electricity.
Wherein, transformer provided by the invention saves quantity of electricity measuring method and can also include obtaining in the project cycle becoming
The peak power S of depressormaxThe step of and computing obtain transformer transformation front and rear the step of saving electric power,
According to formulaComputing is become
Depressor transformation is front and rear to save electric power PSave electric power.Now, when transforming transformer, also transformer is increased in itself simultaneously
Hold.
Application example is illustrated
1 project overview
Project Unit：XXX electric companies
Construction and running situation：Project went into operation on June 4th, 2012, was completed on November 02nd, 2012.Comment at cut-off scene
Estimate day, transformation project all completes.Equipment normal operation during project site assessment.
Scope of assessment：Project reconstruction 1 is changed including transformer, 1 10kV 200kVA S7 type transformers are replaced by
1 10kV 200kVA S11 type transformers.
2 workflows
The working procedure that project saves quantity of electricity measuring and calculating is as follows：
(1) applied code is chosen according to project situation.
(2) transformer transformation project border is determined.
(3) identify project and save measurement and the verification method of electricity and electric power.
(4) change in parameter, including base period and report period needed for measuring transformer transformation saving quantity of electricity calculating is collected
Depressor model, open circuit loss, short circuit loss, base period monthly meter reading electricity etc..
(5) analysis, which calculates, saves quantity of electricity in transformer transformation year, writes and saves quantity of electricity measuring and calculating report.
3 item boundaries
Transformer transformation project, which only considers to reduce, saves quantity of electricity caused by transformer noload losses and short circuit loss, no
Consider because the change of transformer transformation parameter causes the change of the loss of power system other elements, therefore border is defined as becoming
Depressor body.Project important technological parameters refer to table 1.
The project important technological parameters of table 1
4 project operation operating modes
This project base period operating condition is shown in full edition 2.
Table 2：Project base period monthly electric quantity data
| Sequence number | Month | Active energy (kWh) | Capacity of idle power (kVarh) |
| 1 | In January, 2013 | 79274 | 27998 |
| 2 | 2 months 2013 | 78958 | 25227 |
| 3 | In March, 2013 | 62034 | 24360 |
| 4 | In April, 2013 | 68857 | 31934 |
| 5 | In May, 2013 | 81000 | 37351 |
| 6 | In June, 2013 | 66858 | 32383 |
| 7 | In July, 2013 | 66348 | 30370 |
| 8 | In August, 2013 | 71803 | 33339 |
| 9 | In September, 2013 | 72724 | 35067 |
| 10 | In October, 2013 | 76825 | 38966 |
| 11 | In November, 2013 | 80324 | 39727 |
| 12 | In December, 2013 | 82479 | 36994 |
5 save quantity of electricity results of measuring
According to 2013 annual meter reading electric quantity datas, measuring and calculating obtains this project Spring Festival holidays about kilowatt hour of electricity 2825, saves electric power
1.0857 kilowatts, measuring and calculating process refers to table 3
Table 3：Project saves quantity of electricity measure and calculate table
Embodiment above, the purpose of the present invention, technical scheme and beneficial effect are carried out further in detail
Illustrate, should be understood that the embodiment that these are only the present invention, be not intended to limit the invention, it is all at this
Within the spirit and principle of invention, any modification, equivalent substitution and improvements done etc., the protection model of the present invention should be included in
Within enclosing.
Claims (4)
1. a kind of transformation of transformer is front and rear to save quantity of electricity measuring and calculating device, it is characterised in that including active energy acquisition module,
Capacity of idle power acquisition module, average voltage acquisition module, collection period setting module, project cycle setting module, average current
Computing module, short circuit loss electricity computing module, open circuit loss electricity computing module, the front and rear saving electricity computing module of transformation；
The active energy acquisition module is used for the active energy W for obtaining transformer in collection periodThere is i；
The capacity of idle power acquisition module is used for the capacity of idle power W for obtaining transformer in collection periodWithout i；
The average voltage acquisition module is used to obtain the real-time voltage U in collection period between transformer high and low pressure busi, and
Computing obtains average voltage in each collection period
The collection period setting module is used to set collection period TAdopt；
The project cycle setting module is used for setting item cycle T ；
The average current computing module is according to formulaComputing obtains flowing through transformer in collection period
Average current
The short circuit loss electricity computing module is according to formulaComputing obtains project week
The short circuit loss electricity W of transformer in phaseIt is short；
The open circuit loss electricity computing module is according to formula WIt is empty=PIt is empty·T Computing obtains the zero load of transformer in the project cycle
Loss of electricity WIt is empty；
The front and rear electricity computing module of saving of the transformation is according to formula WSave electricity=WBefore short-WAfter short+WUnprecedentedly-WAfter skyComputing obtains transformer
Transformation is front and rear to save electricity；
Wherein, the measurement unit of each physical quantity is international unit in above-mentioned each formula；
PIt is short：The short-circuit electrical power of transformer, PIt is empty：The unloaded electrical power of transformer, Se：The capacity of transformer, WBefore short：Transform preceding paragraph
The short-circuit power consumption of transformer, W in the mesh cycleAfter short：After transformation in the project cycle transformer short-circuit power consumption, WUnprecedentedly：Before transformation
The unloaded power consumption of transformer, W in the project cycleAfter sky：After transformation in the project cycle transformer unloaded power consumption.
2. transformer transformation according to claim 1 is front and rear to save quantity of electricity measuring and calculating device, it is characterised in that also includes
Peak load acquisition module and the front and rear saving electric power computing module of transformation, the peak load acquisition module are used to obtain project week
The peak power S of transformer in phasemax；The front and rear electric power computing module of saving of the transformation is according to formula
Computing is obtained before and after transformer transformation
Save electric power PSave electric power；
Wherein, SBefore max：Before transformation in the project cycle transformer peak power, SAfter max：Transformer in the project cycle after transformation
Peak power, SeBefore：The capacity of transformer, Se before transformationAfterwards：The capacity of transformer, P after transformationBefore short：The short circuit of transformer before transformation
Electrical power, PAfter short：The short-circuit electrical power of transformer tank, P after transformationUnprecedentedly：The unloaded electrical power of transformer, P before transformationAfter sky：Become after transformation
The unloaded electrical power of depressor.
3. a kind of transformer transformation is front and rear to save quantity of electricity measuring method, it is characterised in that comprises the following steps：
Calculate the active energy W of transformer in collection periodThere is i；
Calculate the capacity of idle power W of transformer in collection periodWithout i；
According to the real-time voltage U between the transformer high and low pressure bus in collection periodi, computing obtains average voltage；
Set collection period TAdopt；
Setting item cycle T ；
According to formulaComputing obtains flowing through the average current of transformer in collection period
According to formulaComputing obtains the short circuit loss electricity of transformer in the project cycle
WIt is short；
According to formula WIt is empty=PIt is empty·T Computing obtains the open circuit loss electricity W of transformer in the project cycleIt is empty；
According to formula WSave electricity=WBefore short-WAfter short+WUnprecedentedly-WAfter skyComputing obtains the front and rear saving electricity of transformer transformation；
Wherein, the measurement unit of each physical quantity is international unit in above-mentioned each formula；
PIt is short：The short-circuit electrical power of transformer, PIt is empty：The unloaded electrical power of transformer, Se：The capacity of transformer, WBefore short：Transform preceding paragraph
The short-circuit power consumption of transformer, W in the mesh cycleAfter short：After transformation in the project cycle transformer short-circuit power consumption, WUnprecedentedly：Before transformation
The unloaded power consumption of transformer, W in the project cycleAfter sky：After transformation in the project cycle transformer unloaded power consumption.
4. transformer transformation according to claim 3 is front and rear to save quantity of electricity measuring method, it is characterised in that also includes
Obtain the peak power S of transformer in the project cyclemaxThe step of and computing obtain the front and rear step for saving electric power of transformer transformation
Suddenly,
According to formulaComputing obtains transformer
Transformation is front and rear to save electric power PSave electric power；
Wherein, SBefore max：Before transformation in the project cycle transformer peak power, SAfter max：Transformer in the project cycle after transformation
Peak power, SeBefore：The capacity of transformer, Se before transformationAfterwards：The capacity of transformer, P after transformationBefore short：The short circuit of transformer before transformation
Electrical power, PAfter short：The short-circuit electrical power of transformer tank, P after transformationUnprecedentedly：The unloaded electrical power of transformer, P before transformationAfter sky：Become after transformation
The unloaded electrical power of depressor.
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