CN104170199A - Method for calculating energy saving effect of transformer - Google Patents
Method for calculating energy saving effect of transformer Download PDFInfo
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- CN104170199A CN104170199A CN201280070204.1A CN201280070204A CN104170199A CN 104170199 A CN104170199 A CN 104170199A CN 201280070204 A CN201280070204 A CN 201280070204A CN 104170199 A CN104170199 A CN 104170199A
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- transformer
- loss
- energy
- load
- electric power
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
An electric power evaluation system for a transformer evaluates the loss of a transformer with respect to a load. The electric power evaluation system comprises: an electric power measurement device for collecting electricity data such as a net output, a power factor, and a current with respect to a load; and a computer which is connected to the electric power measurement device and receives the electricity data collected by the electric power measurement device. Further, when calculating the energy saving effect for evaluating the loss of the transformer, the computer receives electricity data at the time of operating the transformer after update, calculates the loss of the transformer after update on the basis of the electricity data, and outputs the difference between the loss of the transformer after update and loss of the transformer before update as reduction loss. Further, for each load factor, the loss of the transformer before update and the loss of the transformer after update are displayed on the display device while being compared to each other. Thereby, a user can easily compare the power consumption (power loss) between a conventional transformer and a newly installed transformer, and thus can easily ascertain economic benefits.
Description
Technical field
The present invention relates to the energy-saving effect computational methods of transformer, relate to and be suitable for evaluating consumption (loss) electric power of transformer, the energy-saving effect computational methods of understanding energy-saving effect.
Background technology
The viewpoint that improves, economizes on resources for the concern to earth environment problem, each enterprise improves energy-conservation concern.
As the system of calculating energy-saving effect method, for example, the method for evaluating energy-saving effect the inverter that efficiency is good that imported is disclosed in patent documentation 1.
In addition, in patent documentation 2, disclose mensuration circuit has been set in client's transformer, the electric weight under real-world operation state has been received to the system of the update scheme of the transformer based on this reception data recovery client as electronic data.
Prior art document
Patent documentation
Patent documentation 1: No. 3976988 communique of Japanese Patent
Patent documentation 2: Japanese Patent 2003-85430 communique
Summary of the invention
The technical problem that invention will solve
Above-mentioned patent documentation 1 discloses the in the situation that of having imported inverter in existing equipment, according to importing inverter cumulative consumption (loss) electric power before and importing the poor of inverter cumulative consumption (loss) electric power before, computing consumption (loss) electric weight, calculated savings the method for the electricity charge.
But, for transformer, although its be categorized as electric equipment same with generator and motor is different with the such whirler of motor from generator, be static machine, be himself energy consumption (loss) less, electric equipment that efficiency is high.And then in transformer, the considerably less amorphous alloy transformer of non-loaded loss is the transformer that efficiency is very high, energy-saving effect is high.
Like this, because transformer is the machine that efficiency is good (being generally more than 97%), so different from the dynamic power machine that energy expenditure amount is large, there is not the variation that monitors consumption (loss) electric power changing about the moment of transformer, show the invention of the advantage economically of the saving generation of consumption (loss) electric power because adding up.
In addition,, in patent documentation 2, only in the case of having imported new transformer, consumption (loss) electric power in calculation of performance indicators poor, emphasizes the energy-saving effect therefore producing.
But in this patent documentation 2, in the time that client imports new transformer, existence can not be understood compared with before changing and have the energy-saving effect of what degree, the problem of economic effect after importing.
The present invention is for addressing the above problem, its object is to provide a kind of energy-saving effect computational methods of transformer, it is in transformer, can easily carry out the comparison of consumption (loss) electric power of the moment variation of existing transformer and newly-installed transformer, be easy to understand the advantage economically of accumulative total.
For the technological means of dealing with problems
The electric power evaluation system of transformer of the present invention, in the time existing transformer to supply with electric power between load and supply unit, the electric power evaluation system of evaluating the transformer of the loss of the transformer corresponding with load, has: the electric power measuring device of collecting the electric datas such as the effective electricity corresponding with load, power factor, electric current; With the computer that is connected, receives the electric data of being collected by electric power measuring device with electric power measuring device.
Then, in the time calculating the energy-saving effect of transformer of the loss of evaluating transformer, electric data when above-mentioned computer receives the running of the transformer after upgrading, calculate the loss of the transformer after upgrading based on this electric data, the difference of the loss in the transformer before the loss of the transformer after upgrading and renewal is as the output that reduces the wastage.
In addition, the loss of the transformer by the loss of the transformer before the renewal of each load factor and after upgrading is presented in display unit with the form comparing.
In addition, consumption (loss) electric weight of the transformer by the consumption of the transformer before the renewal of time per unit (loss) electric weight and after upgrading is presented in display unit with the form comparing.
In addition the energy-conservation amount of money and the energy-conservation amount of money of contract, consumption (loss) electric weight of the transformer according to consumption (loss) electric weight of the transformer before upgrading and after upgrading obtained are presented in display unit with the form comparing.
The energy-conservation amount of money or the amount of the time dependent accumulative total of in addition, consumption (loss) electric weight of the transformer according to consumption (loss) electric weight of the transformer before upgrading and after upgrading being obtained are presented in display unit.
The effect of invention
According to the present invention, a kind of energy-saving effect computational methods of transformer can be provided, in industrial transformer, can easily carry out the comparison of consumption (loss) electric power of the moment variation of existing transformer and newly-installed transformer, be easy to understand the advantage economically of accumulative total.
Brief description of the drawings
Fig. 1 is the structure chart of the electric power evaluation system of the transformer of an embodiment of the invention.
Fig. 2 is the bar chart that represents the variation of load factor hourly.
Fig. 3 is the bar chart that represents the real data of the variation of load factor hourly.
Fig. 4 is explanation carrys out the situation of computational load rate curve chart according to the effective electricity consideration power factor of 1 hour.
Fig. 5 is the curve chart that the electric current under the sampling interval illustrating according to the rules carrys out the situation of computational load rate.
Fig. 6 be represent according to equivalent load rate obtain before the renewal of transformer with upgrade after the flow chart of processing of difference of loss.
Fig. 7 is the curve chart of the loss of the transformer before the renewal contrasting while representing load factor is changed and after renewal.
Fig. 8 is the curve chart reducing the wastage while representing to make load factor to change.
Fig. 9 is the curve chart of the variation of the effect of the amount of energy saving of representation unit time.
Figure 10 is in the time that transformer upgrades, for contrasting and the curve chart of the comparison of the amount of energy saving of contract part.
Figure 11 is the curve chart representing because of the accumulative total effect of energy-conservation generation.
Embodiment
With Fig. 1 to Figure 11, an embodiment of the invention are described below.
First, the structure of the electric power evaluation system of the transformer of an embodiment of the invention is described with Fig. 1.
Fig. 1 is the structure chart of the electric power evaluation system of the transformer of an embodiment of the invention.
Present embodiment is that three-phase alternating-current supply, load describe with the system of the situation of three-phase alternating current work for power supply.
The structure of the electric power evaluation system of the transformer of present embodiment, is made up of power supply 00, transformer 10, load 20, electric power measuring device 30, IF unit 40, computer 100, display unit 111, keyboard 121, mouse 122, HDD140.
Power supply 00 is for example three-phase alternating-current supply, can be that external power source can be also the internal electric source of equipment.
Transformer 10 is to utilize electromagnetic induction to convert the height of the voltage of the alternating electromotive force of primary side (input side), to the electric power equipment of secondary side (outlet side) output.In present embodiment, transformer is three-phase transformer.
Load 20 is machines of real consumption electric power in equipment, for example, be motor, compressor etc.
Electric power measuring device 30 is electric current, voltage, electrical power, the electric weight under exchanging for instrumentation, collects the device of data.
IF unit 40 is the unit for electric power measuring device 30 is connected with computer 100, is connected by special order wire with electric power measuring device 30, is connected by general serial i F with computer 100.
Computer 100 is that CPU (Central Processing Unit) 101, serial i F102, primary storage 103, pattern I F104, input and output IF105, auxilary unit IF106 are by the mode of bus combination.
CPU101 controls each portion of computer 100, will be loaded into main storage means 102 for the program of electric power evaluation and carry out.
Serial i F103 is the interface for being connected with IF unit 40.
Primary storage 103 is made up of volatile storages such as RAM conventionally, the program that storage CPU101 carries out, the data of reference.
Pattern I F104 is the interface for connecting the display unit 111 such as LCD (Liquid Crystal Display).
Input and output IF120 is the interface for connecting input/output unit.In the example of Fig. 1, be connected with keyboard 121 and the mouse 122 as pointing apparatus.
Auxilary unit IF140 is the interface for connecting the auxilary unit such as HDD (Hard Disk Drive) 140 and DVD driver (Digital Versatile Disk) (not shown).
HDD140 has jumbo memory capacity, has stored data collection program 141, power system calculation program 142, display routine 60 for carrying out present embodiment.
Data collection program 141 is the programs for collect data from electric power measuring device 30.
Power system calculation program 142 is the programs for the data of collecting are added up, processed.
Display routine 143 is for by the data use table after the data of collecting and processing or the program that shows of curve chart.
Electricity charge conversion program 144 is the programs that will be scaled the electricity charge for consuming (loss) electric weight.
Then, with Fig. 2 to Fig. 8, the first electric power evaluation method that the electric power evaluation system of the transformer of an embodiment of the invention carries out is described.
First, concept and the actual measurement of load factor are described with Fig. 2 and Fig. 3.
Fig. 2 is the bar chart that represents the variation of load factor hourly.
Fig. 3 is the bar chart that represents the real data of the variation of load factor hourly.
Loss while being updated to the transformer of new importing from existing transformer reduces effect computational methods, it was generally the load factor of calculating " during certain " after upgrading in the past, the loss of the transformer before upgrading according to performance Index Calculation based on this load factor, and according to the loss of the transformer after performance Index Calculation renewal, calculate the method for effect by their difference.
Originally to use equivalent load rate according to " load loss " in performance index, recorded, " loss of non-loaded loss calculating transformer; but the calculation of complex of equivalent load rate; thus general more use Rate of average load, may correctness deficiency in the situation that load change is many.In addition, the calculating of this loss neither be calculated continuously, but greatly mainly with the frequency of monthly 1 time or annual 1 time by manually carrying out loss calculating.
At this, in present embodiment, as described below according to equivalent load rate, by automatically computed losses of computer 100.
In order to measure the energy loss of transformer, be taking load factor as benchmark.The intricately duration of runs of actual transformer changes, so diurnal load diagram was cut apart by the unit interval, and the equivalent load rate that digital simulation is stair-stepping bar chart.
Load factor is expressed by following (formula 1).
Load factor=(apparent power)/transformer capacity
=(effective power ÷ power factor)/transformer capacity
≈ (effective electricity ÷ power factor)/transformer capacity ... (formula 1)
Sampling interval=1 hour, during equivalent load rate while being 1, the in the situation that of Fig. 2 by below (formula 2) obtain.
[several 1]
Equivalent load rate:
(formula 2)
In addition, the Rate of average load in the situation of Fig. 3 is obtained by following (formula 3).
[several 2]
Equivalent load rate:
(formula 3)
Then, obtain the processing of upgrading the loss variation producing because of transformer according to load factor with Fig. 4～Fig. 6 explanation.
Fig. 4 is explanation carrys out the situation of computational load rate curve chart according to the effective electricity consideration power factor of 1 hour.
Fig. 5 is the curve chart of the situation of the Current calculation load factor under the sampling interval illustrating according to the rules.
Fig. 6 be represent according to equivalent load rate obtain before the renewal of transformer with upgrade after the flow chart of processing of difference of loss.
Obtaining the first method of load factor, is that electric power measuring device 30 is collected effective electricity and power factor, the method for obtaining according to them.Herein, effective electricity is the effective electricity of 1 hour as shown in Figure 4.
Obtaining the second method of load factor, is the electric current that electric power measuring device 30 was collected under the sampling interval specifying, the method for obtaining according to them.
As shown in Figure 5, the method for obtaining electric current is original method from the consideration method of load factor, but because the sampling interval limited, so orientate as than the simple method of the first method.
Then, with Fig. 6 explanation obtain before the renewal of transformer with upgrade after the processing of difference of loss.
First, obtain as stated above the equivalent load rate (S01) of the transformer after renewal according to following (formula 4).In addition, the load factor before renewal can provide from outside, the value that also can use instrumentation as stated above and obtain.
[several 3]
Herein, Pe is the equivalent load rate of obtaining, and Pi is load factor in interval i or i load factor of sampling, has N.For example, in above example, Pi is 1 hour load factor in interval, is 1 during this time, so N=24.
Then, calculate the total losses W1[kW of the transformer after upgrading according to equivalent load rate according to following (formula 5)] (S02).
Loss that W1={ is non-loaded [W]+load loss [W] × (equivalent load rate)
2}/1000 × N
(formula 5)
Then, calculate the total losses W2[kW of the transformer before upgrading according to equivalent load rate according to following (formula 6)] (S03).
Loss that W2={ is non-loaded [W]+load loss [W] × (equivalent load rate)
2}/1000 × N
(formula 6)
Then, obtain the Δ W[kW that reduces the wastage of the renewal front and back of transformer according to following (formula 7)] (S04).
Δ W=W2-W1 ... (formula 7)
Then, on curve chart or form, show the Δ W[kW that reduces the wastage] (S05).
Then, with Fig. 7 and Fig. 8, the example that shows the energy-saving effect because upgrading transformer generation is described.
Fig. 7 is the curve chart of the loss of the transformer before the renewal contrasting while representing load factor is changed and after renewal.
Fig. 8 is the curve chart reducing the wastage while representing to make load factor to change.
As shown in Figure 7, the loss of transformer curve chart performance with quadratic function with respect to load factor.Loss when load factor=0% is the non-loaded loss of loss (iron loss) also occurring while thering is no load.In order to suppress this loss, need material that service wear the is few iron core as transformer, use in the amorphous alloy transformer of non-crystaline amorphous metal as the iron core of transformer, can suppress to greatest extent this non-loaded loss.
When load factor=100%, load loss (copper loss) maximum, the loss of transformer is also maximum.
Before and after the renewal of transformer, reduce the wastage Δ W as shown in Figure 8.
The poor w2 maximum of loss when load factor=0%, describes conic section afterwards, the poor w1 of the loss while being gradually reduced to load factor=1000%.
If the display unit 111 in system shows this curve, user just can visually understand energy-saving effect.
Then, with Fig. 9 and Figure 11, the second electric power evaluation method that the electric power evaluation system of the transformer of an embodiment of the invention carries out is described.
Fig. 9 is the curve chart that represents the variation of the effect of the amount of energy saving of time per unit.
Figure 10 is in the time that transformer upgrades, for contrasting and the curve chart of the comparison of the amount of energy saving of contract part.
Figure 11 is the curve chart representing because of the energy-conservation accumulative total effect producing.
The variation of consumption (loss) electric weight (amount of energy saving) that as shown in Figure 9, time per unit when display update transformer can be saved in display unit 111.Thus, can directly visually understand the benefit producing because importing transformer.Consumption (loss) electric power of the transformer before renewal can use the electric power data shown in Fig. 1, also can obtain according to performance index.
In addition, while importing transformer, and between client, have in the situation of contract of the energy-conservation amount of money, as shown in figure 10, the energy-conservation amount of money under displaying time changes.The energy-conservation amount of money is calculated by power system calculation program 144 according to consumption (loss) electric power data of collecting.And the energy-conservation amount of money between client is made as P[yen].
And then as shown in figure 11, by showing the energy-conservation amount of money of accumulative total producing because importing transformer, client can visually understand the benefit that imports the transformer that novel energy-saving effect is high.
The explanation of symbol
00 ... power supply, 10 ... transformer, 20 ... load, 30 ... electric power measuring device, 40 ... IF unit, 100 ... computer, 111 ... display unit, 121 ... keyboard, 122 ... mouse, 140 ... HDD.
Claims (6)
1. energy-saving effect computational methods for transformer, in the time existing transformer to supply with electric power between load and supply unit, evaluate the loss of the transformer corresponding with load, it is characterized in that:
Collect the electric data corresponding with load by electric power measuring device,
Have with described electric power measuring device and be connected, receive the computer of the electric data of being collected by described electric power measuring device,
Electric data when described computer receives the transformer running after upgrading, calculate the loss of the transformer after upgrading based on this electric data, export using the difference of the loss of the transformer before the loss of the transformer after described renewal and described renewal as reducing the wastage.
2. the energy-saving effect computational methods of transformer as claimed in claim 1, is characterized in that:
Described computer in the time of the loss of transformer of calculating after upgrading, effective power, power factor or the electric current corresponding with load collected based on described electric power measuring device, the equivalent load rate of the transformer after computing is upgraded,
Equivalent load rate, load loss and the non-loaded loss of the transformer of described computer based after described renewal, the loss of the transformer after computing is upgraded, exports as reducing the wastage.
3. the energy-saving effect computational methods of transformer as claimed in claim 1, is characterized in that:
The loss of the transformer by the loss of the transformer before the renewal of each load factor and after upgrading is presented in display unit with the form comparing.
4. the energy-saving effect computational methods of transformer as claimed in claim 1, is characterized in that:
Consumption (loss) electric weight of the transformer by the consumption of the transformer before the renewal of time per unit (loss) electric weight and after upgrading is presented in display unit with the form comparing.
5. the energy-saving effect computational methods of transformer as claimed in claim 1, is characterized in that:
The energy-conservation amount of money or amount and the energy-conservation amount of money of contract or amount that consumption (loss) electric weight of the transformer according to consumption (loss) electric weight of the transformer before upgrading and after upgrading is obtained, be presented in display unit with the form comparing.
6. the energy-saving effect computational methods of transformer as claimed in claim 1, is characterized in that:
The energy-conservation amount of money or the amount of the time dependent accumulative total that consumption (loss) electric weight of the transformer according to consumption (loss) electric weight of the transformer before upgrading and after upgrading is obtained are presented in display unit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2012/054025 WO2013124960A1 (en) | 2012-02-20 | 2012-02-20 | Method for calculating energy saving effect of transformer |
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| Publication Number | Publication Date |
|---|---|
| CN104170199A true CN104170199A (en) | 2014-11-26 |
| CN104170199B CN104170199B (en) | 2017-12-01 |
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| CN201280070204.1A Active CN104170199B (en) | 2012-02-20 | 2012-02-20 | The energy-saving effect computational methods of transformer |
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| Country | Link |
|---|---|
| JP (1) | JP5937670B2 (en) |
| CN (1) | CN104170199B (en) |
| WO (1) | WO2013124960A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092914A (en) * | 2021-04-09 | 2021-07-09 | 广东电网有限责任公司 | Transformer loss monitoring method and transformer loss monitoring system |
| CN114624530A (en) * | 2022-03-12 | 2022-06-14 | 云知声智能科技股份有限公司 | Method, device, equipment and medium for determining real-time load rate of transformer |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698269B (en) * | 2015-03-12 | 2017-11-28 | 国家电网公司 | A kind of transformer transformation is front and rear to save quantity of electricity measuring and calculating device and measuring method |
| JP6101319B2 (en) * | 2015-08-14 | 2017-03-22 | 株式会社ジェルシステム | Power loss monitoring system and cubicle |
| CN105976269B (en) * | 2016-05-20 | 2020-10-09 | 广东芬尼克兹节能设备有限公司 | Centralized monitoring method and system for unit electric quantity |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001155089A (en) * | 1999-09-13 | 2001-06-08 | Hitachi Ltd | Method and device for providing energy saving service |
| JP2003085430A (en) * | 2001-09-12 | 2003-03-20 | Hitachi Ltd | Order reception supporting method for transformer |
| CN101741097A (en) * | 2009-12-29 | 2010-06-16 | 中国电力科学研究院 | Distribution transformer capacity sequence grade optimizing method |
-
2012
- 2012-02-20 JP JP2014500774A patent/JP5937670B2/en active Active
- 2012-02-20 CN CN201280070204.1A patent/CN104170199B/en active Active
- 2012-02-20 WO PCT/JP2012/054025 patent/WO2013124960A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001155089A (en) * | 1999-09-13 | 2001-06-08 | Hitachi Ltd | Method and device for providing energy saving service |
| JP2003085430A (en) * | 2001-09-12 | 2003-03-20 | Hitachi Ltd | Order reception supporting method for transformer |
| CN101741097A (en) * | 2009-12-29 | 2010-06-16 | 中国电力科学研究院 | Distribution transformer capacity sequence grade optimizing method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092914A (en) * | 2021-04-09 | 2021-07-09 | 广东电网有限责任公司 | Transformer loss monitoring method and transformer loss monitoring system |
| CN114624530A (en) * | 2022-03-12 | 2022-06-14 | 云知声智能科技股份有限公司 | Method, device, equipment and medium for determining real-time load rate of transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104170199B (en) | 2017-12-01 |
| JPWO2013124960A1 (en) | 2015-05-21 |
| WO2013124960A1 (en) | 2013-08-29 |
| JP5937670B2 (en) | 2016-06-22 |
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