CN107819332A - A kind of method of transformer reactive compensation - Google Patents
A kind of method of transformer reactive compensation Download PDFInfo
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- CN107819332A CN107819332A CN201711066101.9A CN201711066101A CN107819332A CN 107819332 A CN107819332 A CN 107819332A CN 201711066101 A CN201711066101 A CN 201711066101A CN 107819332 A CN107819332 A CN 107819332A
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- Prior art keywords
- transformer
- power
- reactive
- active
- compensation
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1878—Arrangements for adjusting, eliminating or compensating reactive power in networks using tap changing or phase shifting transformers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of method of transformer reactive compensation to comprise the following steps：A. transformer foundation data, the active-power P 2 and reactive power Q 2 of Circuit Fault on Secondary Transformer are gathered；B. secondary side power factor (PF) ￡ 2 is calculated with active-power P 2 and reactive power Q 2；C. the theoretical power (horse-power) factor ￡ 1 of Circuit Fault on Secondary Transformer is calculated with transformer foundation data；D. when power factor difference ￡ 3 is more than or equal to 0.1, the idle amount Q of maximum capacitive needed for calculating transformerC, the wherein ￡ 1 of ￡ 3=￡ 2；E. the idle amount Q of maximum capacitive is usedCThe columns for needing the compensating electric capacity array accessed to connect is calculated, is then linked into the secondary current loop of transformer primary side.According to the reactive-load compensation method of the present invention, reactive-load compensation effectively can be carried out in user terminal.
Description
Technical field
The present invention relates to transformer technical field, and in particular to a kind of method of transformer reactive compensation.
Background technology
The general principle of reactive-load compensation：The power of power network output includes two parts：First, active power：Directly consumption electricity
Can, electric energy is changed into mechanical energy, heat energy, chemical energy or acoustic energy, using these energy works done, this Partial Power is referred to as wattful power
Rate；Second, reactive power：Electric energy is not consumed, simply converts electrical energy into another form of energy, it is this to be used as electrical equipment
It is capable of the necessary requirement of work done, also, this can be periodically switched in power network with electric energy, this Partial Power is referred to as nothing
Work(power (such as electromagnetic component establishes the electric energy of magnetic field occupancy, and capacitor establishes the electric energy shared by electric field).
The reactive-load compensation of user terminal is always the measure that power system is advocated, but the choosing of transformer reactive compensation position
Select, the effect of reactive-load compensation will be determined；Directly affect the change of the power consumption of user, directly contribute the electricity charge of large-scale electricity consumption enterprise into
This rise.Therefore, the selection of the reactive-load compensation position of user terminal is that we are badly in need of technical problems to be solved.
The content of the invention
For the deficiency in the presence of prior art, the invention provides a kind of method of transformer reactive compensation, solves
The problem of transformer compensation effect is bad.
To achieve the above object, present invention employs following technical scheme：A kind of method bag of transformer reactive compensation
Include following steps：
A. transformer foundation data, the active-power P 2 and reactive power Q 2 of Circuit Fault on Secondary Transformer are gathered；
B. secondary side power factor (PF) ￡ 2 is calculated with active-power P 2 and reactive power Q 2；
C. the theoretical power (horse-power) factor ￡ 1 of Circuit Fault on Secondary Transformer is calculated with transformer foundation data；
D. when power factor difference ￡ 3 is more than or equal to 0.1, the idle amount Q of maximum capacitive needed for calculating transformerC,
Wherein ￡ 3=￡ 2- ￡ 1；
E. the idle amount Q of maximum capacitive is usedCThe columns for needing the compensating electric capacity array accessed to connect is calculated, is then accessed
To the secondary current loop of transformer primary side.
When power factor difference ￡ 3 is less than 0.1, according to original Reactive Compensation Mode, both voltage side compensated.
Specifically calculating process is：
Transformer foundation data, which include transformer foundation data, includes short-circuit voltage UK, no-load transformer electric current percentage value I0、
Open circuit loss power P0, copper loss PK, the active-power P of transformer output end and the reactive power Q of transformer output end.
Secondary side power factor (PF)
Wherein, theoretical power (horse-power) factorWPReactive power is inputted for transformer primary side,
WQFor transformer primary side active power；
Wherein transformer inactivitySBFor transformer rated capacity, UB
For transformer rated voltage；XBFor transformer induction reactance,
Transformer active loss powerWherein the active loss of transformer becomes piezoresistanceWherein SPFor transformer rated power.
Amount that maximum capacitive is idleUd is the transformer side for needing to compensate
Impedance voltage percentage value；ImAfter installing compensation device for bus, need to compensate the maximum load current value of side by transformer,
IeNeed to compensate the load current value of side for transformer, Io is no-load transformer electric current percentage value；SeNeed to compensate for transformer
The rated capacity of side.
Compared to prior art, the present invention has the advantages that：According to the reactive-load compensation method of the present invention, Ke Yiyou
Effect carries out reactive-load compensation in user terminal, improves power factor, it is too high to reduce the grid electricity fee cost caused by power factor is too low
Problem；Reactive-load compensation can be effectively carried out, overcomes certain technology prejudice.
Brief description of the drawings
Fig. 1 is the electricity consumption statistical form before compensation；
Fig. 2 is the electricity consumption statistical form after compensation.
Fig. 3 is reactive compensation capacitor array.
Embodiment
The present invention is described further below in conjunction with the accompanying drawings.
Embodiment one
A kind of method of transformer reactive compensation of the present invention comprises the following steps：
A. transformer foundation data, the active-power P 2 and reactive power Q 2 of Circuit Fault on Secondary Transformer are gathered；
B. secondary side power factor (PF) ￡ 2 is calculated with active-power P 2 and reactive power Q 2；
C. the theoretical power (horse-power) factor ￡ 1 of Circuit Fault on Secondary Transformer is calculated with transformer foundation data；
D. when power factor difference ￡ 3 is more than or equal to 0.1, the idle amount Q of maximum capacitive needed for calculating transformerC,
Wherein ￡ 3=￡ 2- ￡ 1；
E. the idle amount Q of maximum capacitive is usedCThe columns for needing the compensating electric capacity array accessed to connect is calculated, is then accessed
To the secondary current loop of transformer primary side.
When power factor difference ￡ 3 is less than 0.1, according to original Reactive Compensation Mode, both voltage side compensated.
Specifically calculating process is：
Transformer foundation data, which include transformer foundation data, includes short-circuit voltage UK, no-load transformer electric current percentage value I0、
Open circuit loss power P0, copper loss PK, the active-power P of transformer output end and the reactive power Q of transformer output end.
Secondary side power factor (PF)
Wherein, theoretical power (horse-power) factorWPReactive power is inputted for transformer primary side,
WQFor transformer primary side active power；
Wherein transformer inactivitySBFor transformer rated capacity, UB
For transformer rated voltage；XBFor transformer induction reactance,
Transformer active loss powerWherein the active loss of transformer becomes piezoresistanceWherein SPFor transformer rated power.
Amount that maximum capacitive is idleUd is the transformer side for needing to compensate
Impedance voltage percentage value；ImAfter installing compensation device for bus, need to compensate the maximum load current value of side by transformer,
IeNeed to compensate the load current value of side for transformer, Io is no-load transformer electric current percentage value；SeNeed to compensate for transformer
The rated capacity of side.
Compared to prior art, the present invention has the advantages that：According to the reactive-load compensation method of the present invention, Ke Yiyou
Effect carries out reactive-load compensation in user terminal, improves power factor, it is too high to reduce the grid electricity fee cost caused by power factor is too low
Problem；Reactive-load compensation, certain technology prejudice of customer service can effectively be carried out.
Embodiment two
By existing transformer test data, secondary side power factor (PF) ￡ 2=0.89, the Circuit Fault on Secondary Transformer calculated
Theoretical power (horse-power) factor ￡ 1=0.74, Qc=484.5KVA.QcCompensation 500KVA is rounded, using 20 25KVA capacitor bank groups
Into permutation.Then need by contact-making switch to access 20 tunnel capacitor banks on transformer primary side secondary circuit main line.
：Comparison diagram 1 and Fig. 2,
Fig. 1 is that selection low-pressure side carries out the data after reactive-load compensation, same QcObtained power factor is 0.89；Due to
Difference between ￡ 2 and ￡ 1 is more than 0.1, has a long way to go, then with same QcTransformer primary side secondary circuit main line is carried out
Compensation, obtains Fig. 2 data, actual power factor has brought up to 0.97 or so, and effect is well more many than the former effect, improves
Compensation efficiency, reduce the input of reactive-load compensator.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (5)
- A kind of 1. method of transformer reactive compensation, it is characterised in that comprise the following steps：A. transformer foundation data, the active-power P 2 and reactive power Q 2 of Circuit Fault on Secondary Transformer are gathered；B. secondary side power factor (PF) is calculated with active-power P 2 and reactive power Q 2C. the theoretical power (horse-power) factor of Circuit Fault on Secondary Transformer is calculated with transformer foundation dataD. when power factor is poorDuring more than or equal to 0.1, the idle amount Q of maximum capacitive needed for calculating transformerC, whereinE. the idle amount Q of maximum capacitive is usedCThe columns for needing the compensating electric capacity array accessed to connect is calculated, is then linked into change The secondary current loop of depressor primary side.
- 2. a kind of method of transformer reactive compensation as claimed in claim 1, it is characterised in that transformer foundation data include short Road voltage UK, no-load transformer electric current percentage value I0, open circuit loss power P0, copper loss PK, transformer output end active-power P With the reactive power Q of transformer output end.
- A kind of 3. method of transformer reactive compensation as claimed in claim 2, it is characterised in thatSecondary side power factor (PF)
- A kind of 4. method of transformer reactive compensation as claimed in claim 2, it is characterised in thatWherein, power factorWPReactive power, W are inputted for transformer primary sideQFor transformation Device primary side active power；Wherein transformer inactivitySBFor transformer rated capacity, UBTo become Depressor rated voltage；XBFor transformer induction reactance,Transformer active loss powerWherein the active loss of transformer becomes piezoresistanceWherein SPFor transformer rated power.
- A kind of 5. method of transformer reactive compensation as claimed in claim 2, it is characterised in thatAmount that maximum capacitive is idleUd is the impedance for the transformer side that needs compensate Voltage percentage value；ImAfter installing compensation device for bus, need to compensate the maximum load current value of side, I by transformereFor Transformer needs to compensate the load current value of side, and Io is no-load transformer electric current percentage value；SeCompensation one is needed for transformer The rated capacity of side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711066101.9A CN107819332A (en) | 2017-11-02 | 2017-11-02 | A kind of method of transformer reactive compensation |
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| CN201711066101.9A CN107819332A (en) | 2017-11-02 | 2017-11-02 | A kind of method of transformer reactive compensation |
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| CN107819332A true CN107819332A (en) | 2018-03-20 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1651925A (en) * | 2005-02-23 | 2005-08-10 | 西安瑞驰冶金设备有限责任公司 | Method for metering transformer loss |
| CN101728834A (en) * | 2009-12-25 | 2010-06-09 | 秦岭 | Reactive automatic compensating method |
| CN101872980A (en) * | 2010-06-08 | 2010-10-27 | 陈劲游 | Method for controlling low-voltage side reactive compensation equipment according to transformer high-voltage side reactive compensation control quantity |
| CN102545232A (en) * | 2010-12-08 | 2012-07-04 | 绥化电业局 | Distributed type intelligent reactive compensation box |
| JP2012178962A (en) * | 2011-02-25 | 2012-09-13 | Nagoya Institute Of Technology | Phase-advance capacitor control device |
| CN103346575A (en) * | 2013-06-28 | 2013-10-09 | 葛洲坝集团机电建设有限公司 | Adjusting system improving power factors |
| CN103490433A (en) * | 2013-09-30 | 2014-01-01 | 国家电网公司 | Method for reactive power optimization of power distribution network |
-
2017
- 2017-11-02 CN CN201711066101.9A patent/CN107819332A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1651925A (en) * | 2005-02-23 | 2005-08-10 | 西安瑞驰冶金设备有限责任公司 | Method for metering transformer loss |
| CN101728834A (en) * | 2009-12-25 | 2010-06-09 | 秦岭 | Reactive automatic compensating method |
| CN101872980A (en) * | 2010-06-08 | 2010-10-27 | 陈劲游 | Method for controlling low-voltage side reactive compensation equipment according to transformer high-voltage side reactive compensation control quantity |
| CN102545232A (en) * | 2010-12-08 | 2012-07-04 | 绥化电业局 | Distributed type intelligent reactive compensation box |
| JP2012178962A (en) * | 2011-02-25 | 2012-09-13 | Nagoya Institute Of Technology | Phase-advance capacitor control device |
| CN103346575A (en) * | 2013-06-28 | 2013-10-09 | 葛洲坝集团机电建设有限公司 | Adjusting system improving power factors |
| CN103490433A (en) * | 2013-09-30 | 2014-01-01 | 国家电网公司 | Method for reactive power optimization of power distribution network |
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Application publication date: 20180320 |