CN109586316A - A kind of factory's Practical power factor compensation method - Google Patents
A kind of factory's Practical power factor compensation method Download PDFInfo
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- CN109586316A CN109586316A CN201811476826.XA CN201811476826A CN109586316A CN 109586316 A CN109586316 A CN 109586316A CN 201811476826 A CN201811476826 A CN 201811476826A CN 109586316 A CN109586316 A CN 109586316A
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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
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of factory's Practical power factor compensation method, including workload when selecting work according to the actual motion demand of factory close to the electrical equipment of rated capacity, and zero load or the low-load operating status time of the electrical equipment are reduced；Make reactive compensation using multiple electrostatic condensers, multiple electrostatic condenser dispersions is installed in the near electrical equipment in each workshop of the factory, and each electrostatic condenser is connected with the motor in corresponding workshop；Or each electrostatic condenser is installed on the low-voltage bus bar of corresponding workshop electric substation；Or multiple electrostatic condensers are concentrated be installed in the high voltage variable of the factory with high voltage bus on.Factory's electricity can be saved by implementing factory's Practical power factor compensation method provided by the invention, reduce the loss of factory's electric energy.
Description
Technical field
The present invention relates to technical field of electric power, more particularly, to a kind of factory's Practical power factor compensation method.
Background technique
Due to the application of a large amount of inductive loads in electric system, there are a differential seat angles in phase for voltage, electric current, thus
Drawn reactive power --- reaction power supply and load between energy exchange physical quantity, the size of reactive power show power supply with
The amplitude of energy exchange between load, itself does not consume energy, meanwhile, the flowing of reactive power in systems is to electric system sheet
Body produces very big influence.The presence of reactive power will increase the capacity of equipment, increase the damage of equipment and route in electric system
Consumption increases line drop, to cause voltage fluctuation and flickering, voltage dip and the reduction of equipment utilization rate of electrical etc. a series of
Power quality problem.
In the prior art, in factory power supply system, there are many equipment such as motor, transformer, these equipment largely belong to
In inductive load, they also need to consume a large amount of reactive power while consuming active power, too low due to working as power factor
When, the electric current in transmission line of electricity can be made to increase, be continuously increased power and electric energy loss on route, while will increase route
The loss of voltage.
Summary of the invention
The present invention provides a kind of factory's Practical power factor compensation methodes to reduce factory's electric energy to save factory's electricity
Loss.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of factory's Practical power factor compensation method,
It at least includes the following steps:
It is selected workload when work close to the electrical equipment of rated capacity according to the actual motion demand of factory, and subtracted
The zero load of few electrical equipment or low-load operating status time；
Make reactive compensation using multiple electrostatic condensers, it is each that multiple electrostatic condenser dispersions are installed in the factory
The near electrical equipment in workshop, and each electrostatic condenser is connected with the motor in corresponding workshop；Or it will be every
One electrostatic condenser is installed on the low-voltage bus bar of corresponding workshop electric substation；Or by multiple electrostatic condensers
Concentrate be installed in the high voltage variable of the factory with high voltage bus on.
Preferably, the method also includes:
It detects network voltage and flows into the electric current of the electrical equipment, line frequency spectrum analysis of going forward side by side；
Active power and reactive power are obtained, and power factor is calculated according to the active power and the reactive power；
It is target by the idle control of the electrical equipment and the network voltage, according to the power factor and the electricity
Net voltage determines the switching of power factor compensation branch；
The switching pulse of the thyristor is determined according to the switching voltage polarity of the power factor compensation branch thyristor.
Preferably, the method also includes:
The active power fundamental component of the electric system of the factory is obtained, and according to the active power fundamental component meter
Calculate the watt current fundamental component instantaneous value of the electric system of the factory；
The load current instantaneous value of the electric system of the factory is obtained, and instantaneous according to the watt current fundamental component
The compensating current control instruction current before adjusting is calculated in value and the load current instantaneous value；
The instantaneous power of the electric system of factory described in electric system is calculated according to the active power fundamental component
Factor, and the self-regulation system of the electric system of the factory is calculated according to target power factor and the instantaneous power factor
Compensating current control instruction current needed for several and the factory electric system.
Scheme as a further preference, the active power fundamental component of the electric system for obtaining the factory, tool
Body are as follows:
The instantaneous voltage vector sum transient current vector of the electric system of the factory is obtained, and according to the instantaneous voltage
Transient current vector described in vector sum calculates the instantaneous active power of the electric system of the factory；
The active power fundamental component of the electric system of the factory is obtained according to the instantaneous active power.
Scheme as a further preference, it is described according to the watt current fundamental component instantaneous value and the load current
The compensating current control instruction current before adjusting is calculated in instantaneous value, specifically:
The electric power of the factory is calculated according to the watt current fundamental component instantaneous value and the load current instantaneous value
The deleterious current instantaneous value of system；
The compensating current control instruction current before adjusting is calculated according to the deleterious current instantaneous value.
Compared with the prior art, the beneficial effect of the embodiment of the present invention is that it is practical that the embodiment of the invention provides factories
Power-factor compensation method, comprising steps of selecting workload when work close to specified according to the actual motion demand of factory
The electrical equipment of capacity, and reduce zero load or the low-load operating status time of the electrical equipment；Using multiple electrostatic capacitances
Device makees reactive compensation, and multiple electrostatic condenser dispersions are installed in the near electrical equipment in each workshop of the factory,
And each electrostatic condenser is connected with the motor in corresponding workshop；Or each electrostatic condenser is installed in respectively
On the low-voltage bus bar of self-corresponding workshop electric substation；Or multiple electrostatic condensers are concentrated to the high pressure for being installed in the factory
Become with high voltage bus on.By improving natural power factor and using the method for reactive compensation, work can be effectively saved
Factory's electricity reduces the loss of factory's electric energy, moreover, can mention significantly in the power supply system of factory using the embodiment of the present invention
The power quality of power supply system is risen, while the loss of electric energy being made to be reduced and save the metal material used, that is, uses nothing
After function compensation, the electric current in route can be reduced, then equally can achieve identical power using the lesser conducting wire in section,
Both the calorific value of conducting wire can have been reduced, so that the service life of extension lead, can also save metal material；To reduce work
The power supply expense of factory.
Detailed description of the invention
Fig. 1 is the step flow chart of factory's Practical power factor compensation method in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Figure 1, the preferred embodiment of the present invention provides a kind of factory's Practical power factor compensation method, includes at least
Following steps:
S11, according to the actual motion demand of factory select work when workload close to rated capacity electrical equipment,
And reduce zero load or the low-load operating status time of the electrical equipment；
In the present embodiment, in factory power supply system, the selection of electrical equipment and instrument is also to require, and is not
It is the bigger the better, reasonably should select and use electrical equipment, reduce the reactive power absorbed when equipment itself works, in this way
Method be just raising natural power factor.When the capacity of electrical equipment selection is excessive, reactive power that when work consumes
Bigger, if this electrical equipment cannot approach or relatively full-load run throughout the year, reactive power loss is larger, leads to power
Factor and device efficiency can all reduce, this be it is very unreasonable and uneconomic, so the selection for electrical equipment, Ying Jinliang
The rated capacity of load proximity device when equipment being made to work, can be in allowed limits for the electrical equipment of short-term operation
There is the deviation of a bit, but synchronous motor should be used to be driven to be best the electrical equipment of long-term work.In Factory Electricity Supply system
In system, it is also to be easiest to that it is most basic, which to improve the method for natural power factor,.
Wherein, the method for improving natural power factor has:
(1) model and capacity of reasonable selection asynchronous induction motor, is close to full-load run；Rational Change light load
The wiring of induction conductivity or light load motor prevents " low load with strong power "；When conditions permit, with the synchronization of equivalent capability
Motor replaces asynchronous motor.
(2) no-load transformer is avoided to run or be chronically at low-load operating status.
(3) reasonable arrangement and adjusting process process, improve the operating condition of electrical equipment, and limitation electric welding machine, lathe are electronic
The no-load running of the equipment such as machine.
(4) using the electromagnetic switch without pressure operation.
S21, make reactive compensation using multiple electrostatic condensers, multiple electrostatic condenser dispersions are installed in the work
The near electrical equipment in each workshop of factory, and each electrostatic condenser is connected with the motor in corresponding workshop；
In the present embodiment, due to giving, distribution line and transformer transmission reactive power will also result in electric energy loss and electricity
Crushing consumption, reduces the service efficiency of equipment.Therefore, other than using the method for improving natural power factor, also using artificial
The mode of compensation compensates reactive power.In factory power supply system, capacitor be using it is most and use most wide
A kind of general compensation method.In general, the mode of capacitor parallel connection is used to carry out compensating power to reach increase power factor
Purpose.
Wherein, the electrostatic condenser is generally phase-shift capacitor or power capacitor.Its generation of electrostatic condenser is advanced
Voltage capacity current characteristic generates lagging voltage inductance current with motor, transformer and offsets compensating action.In subscribers' line
Upper electrostatic condenser in parallel appropriate respectively can be such that the reactive current on the power grid of front end substantially reduces, and reactive power consumption is compensated.
Since electrostatic condenser itself has power loss minimum, service life is longer, and is easy the characteristics of installing.
S22 makees reactive compensation using multiple electrostatic condensers, and each electrostatic condenser is installed in it is respectively right
On the low-voltage bus bar for the workshop electric substation answered；
S23 makees reactive compensation using multiple electrostatic condensers, and multiple electrostatic condenser concentrations are installed in institute
State the high voltage variable of factory with high voltage bus on.
In embodiments of the present invention, the method also includes:
It detects network voltage and flows into the electric current of the electrical equipment, line frequency spectrum analysis of going forward side by side；
Active power and reactive power are obtained, and power factor is calculated according to the active power and the reactive power；
It is target by the idle control of the electrical equipment and the network voltage, according to the power factor and the electricity
Net voltage determines the switching of power factor compensation branch；
The switching pulse of the thyristor is determined according to the switching voltage polarity of the power factor compensation branch thyristor.
In the present embodiment, carry out power compensation by taking the electric locomotive equipment of factory as an example, the Electric Locomotive because
Number compensation control is the line frequency spectrum analysis of going forward side by side according to detection network voltage and the electric current for flowing into locomotive；Read in active and idle function
Rate, and power factor is calculated with this, then using the idle control of locomotive and network voltage as target, according to power factor and power grid
The switching of voltage decision power factor compensation branch；Simultaneously according to power factor compensation branch thyristor switch polarity of voltage, certainly
Determine the switching pulse of thyristor；And the electric current of branch is acquired, make spectrum analysis, judges whether overcurrent；As overcurrent will be analyzed
The reason of overcurrent, takes corresponding safeguard measure；And by the working condition of power factor compensation device and network voltage, locomotive
Electric current, each branch electric current relevant information locomotive microcomputer display is transmitted to by communication port, shown by display.
In embodiments of the present invention, the method also includes:
The active power fundamental component of the electric system of the factory is obtained, and according to the active power fundamental component meter
Calculate the watt current fundamental component instantaneous value of the electric system of the factory；
The load current instantaneous value of the electric system of the factory is obtained, and instantaneous according to the watt current fundamental component
The compensating current control instruction current before adjusting is calculated in value and the load current instantaneous value；
The instantaneous power of the electric system of factory described in electric system is calculated according to the active power fundamental component
Factor, and the self-regulation system of the electric system of the factory is calculated according to target power factor and the instantaneous power factor
Compensating current control instruction current needed for several and the factory electric system.
It in the present embodiment, when calculating the compensating current control instruction current before adjusting, is calculated by active power
What unit, watt current fundamental frequency computing unit and compensating current control instruction computing unit were realized, avoid prior art needs
The defect of control system complexity, effectively simplifies system structure caused by being coordinately transformed.
In addition, the present invention is derived using in three-dimensional coordinate based on three-dimensional space when calculating compensation current-order electric current
Between Power Theory watt current fundamental component algorithm, according to watt current fundamental component calculate compensation current-order electric current,
Matrix operation is replaced using vector calculus, is avoided in the prior art through matrix operation, instantaneous active power and idle is calculated
Power solves the defect of algorithm complexity caused by the command signal of compensation electric current, improves the real-time of reactive power compensation control
Property, real-time reactive compensation effectively increases the power factor of system.
In embodiments of the present invention, the active power fundamental component of the electric system for obtaining the factory, specifically:
The instantaneous voltage vector sum transient current vector of the electric system of the factory is obtained, and according to the instantaneous voltage
Transient current vector described in vector sum calculates the instantaneous active power of the electric system of the factory；
The active power fundamental component of the electric system of the factory is obtained according to the instantaneous active power.
In embodiments of the present invention, described instantaneous according to the watt current fundamental component instantaneous value and the load current
The compensating current control instruction current before adjusting is calculated in value, specifically:
The electric power of the factory is calculated according to the watt current fundamental component instantaneous value and the load current instantaneous value
The deleterious current instantaneous value of system；
The compensating current control instruction current before adjusting is calculated according to the deleterious current instantaneous value.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (5)
1. a kind of factory's Practical power factor compensation method, which is characterized in that at least include the following steps:
It is selected workload when work close to the electrical equipment of rated capacity according to the actual motion demand of factory, and reduces institute
State zero load or the low-load operating status time of electrical equipment；
Make reactive compensation using multiple electrostatic condensers, multiple electrostatic condenser dispersions are installed in each workshop of the factory
The near electrical equipment, and each electrostatic condenser is connected with the motor in corresponding workshop；Or by each institute
Electrostatic condenser is stated to be installed on the low-voltage bus bar of corresponding workshop electric substation；Or multiple electrostatic condensers are concentrated
Be installed in the high voltage variable of the factory with high voltage bus on.
2. factory's Practical power factor compensation method as described in claim 1, which is characterized in that the method also includes:
It detects network voltage and flows into the electric current of the electrical equipment, line frequency spectrum analysis of going forward side by side；
Active power and reactive power are obtained, and power factor is calculated according to the active power and the reactive power；
It is target by the idle control of the electrical equipment and the network voltage, according to the power factor and power grid electricity
Press the switching for determining power factor compensation branch；
The switching pulse of the thyristor is determined according to the switching voltage polarity of the power factor compensation branch thyristor.
3. factory's Practical power factor compensation method as described in claim 1, which is characterized in that the method also includes:
The active power fundamental component of the electric system of the factory is obtained, and institute is calculated according to the active power fundamental component
State the watt current fundamental component instantaneous value of the electric system of factory；
Obtain the load current instantaneous value of the electric system of the factory, and according to the watt current fundamental component instantaneous value and
The compensating current control instruction current before adjusting is calculated in the load current instantaneous value；
The instantaneous power factor of the electric system of factory described in electric system is calculated according to the active power fundamental component,
And according to target power factor and the instantaneous power factor be calculated the electric system of the factory self-regulation coefficient and
Compensating current control instruction current needed for the electric system of the factory.
4. factory's Practical power factor compensation method as claimed in claim 3, which is characterized in that the acquisition factory
The active power fundamental component of electric system, specifically:
The instantaneous voltage vector sum transient current vector of the electric system of the factory is obtained, and according to the instantaneous voltage vector
The instantaneous active power of the electric system of the factory is calculated with the transient current vector；
The active power fundamental component of the electric system of the factory is obtained according to the instantaneous active power.
5. factory's Practical power factor compensation method as claimed in claim 3, which is characterized in that described according to the active electricity
The compensating current control instruction current before adjusting is calculated in stream fundamental component instantaneous value and the load current instantaneous value, specifically
Are as follows:
The electric system of the factory is calculated according to the watt current fundamental component instantaneous value and the load current instantaneous value
Deleterious current instantaneous value；
The compensating current control instruction current before adjusting is calculated according to the deleterious current instantaneous value.
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| CN201811476826.XA CN109586316A (en) | 2018-12-04 | 2018-12-04 | A kind of factory's Practical power factor compensation method |
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| CN201811476826.XA CN109586316A (en) | 2018-12-04 | 2018-12-04 | A kind of factory's Practical power factor compensation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111638666A (en) * | 2020-04-29 | 2020-09-08 | 科华恒盛股份有限公司 | Multi-module parallel machine system master-slave-free power distribution method and multi-module power system |
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| CN101396970A (en) * | 2007-09-30 | 2009-04-01 | 南车株洲电力机车有限公司 | Electric locomotive power factor compensation control method and device |
| CN201408997Y (en) * | 2009-05-13 | 2010-02-17 | 王克宇 | Low-voltage intelligent power capacitor |
| CN108429269A (en) * | 2018-04-11 | 2018-08-21 | 丽水博远科技有限公司 | A kind of control system and method for Power System Reactive Power factor compensation |
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2018
- 2018-12-04 CN CN201811476826.XA patent/CN109586316A/en active Pending
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| CN101396970A (en) * | 2007-09-30 | 2009-04-01 | 南车株洲电力机车有限公司 | Electric locomotive power factor compensation control method and device |
| CN201408997Y (en) * | 2009-05-13 | 2010-02-17 | 王克宇 | Low-voltage intelligent power capacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111638666A (en) * | 2020-04-29 | 2020-09-08 | 科华恒盛股份有限公司 | Multi-module parallel machine system master-slave-free power distribution method and multi-module power system |
| CN111638666B (en) * | 2020-04-29 | 2021-11-09 | 漳州科华技术有限责任公司 | Multi-module parallel machine system master-slave-free power distribution method and multi-module power system |
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Application publication date: 20190405 |