CN108233395A - It mixes reactive power compensator and mixes the control method of reactive power compensator - Google Patents
It mixes reactive power compensator and mixes the control method of reactive power compensator Download PDFInfo
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- CN108233395A CN108233395A CN201810184403.4A CN201810184403A CN108233395A CN 108233395 A CN108233395 A CN 108233395A CN 201810184403 A CN201810184403 A CN 201810184403A CN 108233395 A CN108233395 A CN 108233395A
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- 230000008878 coupling Effects 0.000 claims description 44
- 238000010168 coupling process Methods 0.000 claims description 44
- 238000005859 coupling reaction Methods 0.000 claims description 44
- 230000005611 electricity Effects 0.000 claims description 27
- 239000003990 capacitor Substances 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 17
- 230000008447 perception Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 description 6
- 230000003068 static effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
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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
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
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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
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- 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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase 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
- Y02E40/10—Flexible AC transmission systems [FACTS]
-
- 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
- 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
- Y02E40/40—Arrangements for reducing harmonics
-
- 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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The present invention relates to a kind of control methods for mixing reactive power compensator and mixing reactive power compensator, wherein, mixing reactive power compensator carries out comprehensive treatment by using the mode that Passively compensated module and active compensation module are combined to the power quality problem of three phase network.Active compensation is carried out by using SVG, quick fine compensation is carried out with uneven to System Reactive Power, harmonic wave in real time, having carried out grade switching using Passively compensated module compensates, and is combined using SVG and Passively compensated module, the arbitrary adjusting of power factor 1~+1 is realized, to realize that zero crosses benefit.
Description
Technical field
The present invention relates to reactive-load compensation field, in particular to a kind of mixing reactive power compensator and the idle benefit of mixing
Repay the control method of device.
Background technology
With the increase increasingly of net capacity, the requirement to electric network reactive-load is also higher and higher.It transmits and turns as in electric energy
The necessary power of electromagnetic field, the compensation of reactive power and equilibrium problem are established during changing, is got growing concern for.It solves
Good electric network reactive compensation problem can stablize network voltage, improve power factor, improve utilization rate of equipment and installations, reduce line loss,
Ability to transmit electricity is improved, three phase power is balanced, provides voltage support for system, be the trend of current year various countries' power network development.
Static passive compensation device (Static Var Compensator, SVC) is one kind for phase modifier
The device of reactive-load compensation is carried out using capacitor and various types of reactors, it is possible to provide variable capacitive or inductive reactive power.
Their advantage be to design it is simple, without mechanical wear, last a long time, but have a disadvantage in that idle, phase cannot be continuously adjusted
Position balanced capacity is limited, thermal losses is high, to the shortcomings of harmonic wave is sensitive, flexibility is poor.With the development of Power Electronic Technique, it is based on
The static reactive generator (Static Var Generator, SVG) of self commutated convertor structure can realize perception, capacitive without
The continuous bidirectional modulation of work(, and due to the use of be power electronics wholly-controled device, governing speed faster, and is avoided that a large amount of harmonic waves
Injected system.But have a disadvantage in that cost is higher, in addition, SVG is applied to low-voltage distribution network reactive-load compensation field, it is preferable to obtain
Output current wave quality, switching device will be operated under higher switching frequency, with the increase of compensation electric current, switch damage
Consumption dramatically increases, this causes the operational efficiency of equipment to decline.
How to solve the above problems, be urgently to be resolved hurrily at present.
Invention content
The object of the present invention is to provide it is a kind of mix reactive power compensator and mix reactive power compensator control method, with
It solves the above problems.
To achieve these goals, technical solution used in the embodiment of the present invention is as follows：
An embodiment of the present invention provides a kind of mixing reactive power compensator, the mixing reactive power compensator is by using nothing
The mode that source compensating module and active compensation module are combined carries out comprehensive treatment to the power quality problem of three phase network.
In preferred embodiments of the present invention, the mixing reactive power compensator has further included detection module and control mould
Block；
The active compensation module, the Passively compensated module access three phase network by the detection module parallel connection respectively
In；
The control module is electric with the active compensation module, the Passively compensated module and the detection module respectively
Property connection；
The current analog that the detection module is also adapted to detect for three phase network with active compensation module electric connection is believed
Number and be sent to the control module and the active compensation module；
The active compensation module is suitable for carrying out three phase network according to the current analog signal that receives active compensation, humorous
After wave is administered, the reactive current information that the control module is suitable for calculating the current analog signal received three phase network is concurrent
Give the active compensation module；
The active compensation module is further adapted for controlling institute by the control module according to the reactive current information received
It is Passively compensated to three phase network progress to state Passively compensated module.
In preferred embodiments of the present invention, the Passively compensated module includes mending capacitor altogether, divides benefit capacitor or phase
Between arbitrary two or three of combination among capacitor three；
It is described to mend altogether in capacitor, described point of benefit capacitor and the capacitive coupling device access three phase network in parallel；
The capacitor of mending altogether is suitable for carrying out three to three phase network under the first fling-cut switch of control of the control module
Mutually mend altogether；
Described point of benefit capacitor is suitable under the second fling-cut switch of control of the control module carrying out three phase network single
Phase point is mended；And
The capacitive coupling device is suitable for carrying out not three phase network under the control third fling-cut switch of the control module
It is balanced compensated.
In preferred embodiments of the present invention, the detection module includes the current analog letter for being adapted to detect for three-phase electricity net side
Number the first current sensor and the detection Passively compensated module side current analog signal the second current sensor；
First current sensor is electrically connected with the active compensation module, and the current analog suitable for will detect
Signal is sent to the active compensation module；
Second current sensor is electrically connected with the control module, and the current analog signal suitable for will detect
It is sent to the control module.
In preferred embodiments of the present invention, the mixing reactive power compensator is further included electrically to be connected with the control module
The display screen connect；And
The display screen is suitable for the status information for showing that the Passively compensated module is compensated with active compensation module.
The embodiment of the present invention additionally provides a kind of control method for mixing reactive power compensator, the mixing reactive-load compensation dress
The control method put using active compensation and it is Passively compensated be combined by the way of the power quality problem of three phase network is carried out
Comprehensive treatment.
In preferred embodiments of the present invention, the current analog signal and voltage analog signal of three-phase electricity net side are detected；
Active compensation is carried out to three phase network according to the current analog signal and voltage analog signal detected.
In preferred embodiments of the present invention, the capacity of active compensation is detected；
When the capacity of active compensation reaches rated capacity, start to carry out three phase network Passively compensated.
In preferred embodiments of the present invention, the current analog signal and voltage analog signal of Passively compensated side are detected；
Calculate the reactive current information of three phase network；
According to the reactive current information obtained successively to three phase network progress imbalance compensation, three-phase compensation and single-phase point
It mends.
In preferred embodiments of the present invention, the method for the imbalance compensation includes：
When the active content of three-phase electricity net side is more than permissible value, and to be respectively less than setting value, three-phase active not for three-phase activity coefficient
When coefficient of balance is more than permissible value, opens capacitive coupling device and imbalance compensation is carried out to three phase network；
When the active maximum value of three-phase and the active average value difference of three-phase are more than the active average value of three-phase and the active minimum of three-phase
The difference of value, capacitive coupling device increase corresponding capacitive coupling and carry out imbalance compensation to three phase network；
When the active maximum value of three-phase and the active average value difference of three-phase are less than the active average value of three-phase and the active minimum of three-phase
The difference of value, capacitive coupling device increase corresponding capacitive coupling and carry out imbalance compensation to three phase network；
When the active unbalance factor of three-phase is less than permissible value, stops capacitive coupling device and uneven benefit is carried out to three phase network
It repays；
When active difference between phase and phase is more than the capacity of capacitive coupling, stop corresponding capacitive coupling to three phase network
Carry out imbalance compensation；
The method of the three-phase compensation includes：
When the three-phase of three-phase electricity net side is in perceptual state, the reactive power of three-phase electricity net side is all higher than one group and mends electricity altogether
During the capacity of appearance, one group of throwing is added to mend capacitance altogether, three-phase compensation is carried out to three phase network；
When the three-phase of three-phase electricity net side is in capacitive state, the idle surplus of three-phase of active compensation output is all higher than arbitrarily
One group mend capacitance altogether capacity when, stop one group mend altogether capacitance to three phase network carry out three-phase compensation；
When the three-phase of active compensation output is idle is perception, stops one group and mend capacitance altogether to three phase network progress three-phase
It mends altogether；
The method of the single-phase compensation includes：
When the idle appearance for being more than component benefit capacitance with the idle minimum difference of three-phase inlet wire of three-phase electricity net side two-phase inlet wire
During amount, increase corresponding point and mend capacitance to three phase network progress single-phase compensation；
When a certain mutually idle rated value of active compensation output and the difference of the idle output valve in the phase for carrying out single-phase compensation
When value mends the capacity of capacitance more than a component, stop single-phase compensation of point benefit capacitance to three phase network of corresponding phase.
Relative to the prior art, the embodiment of the present invention has the advantages that：
An embodiment of the present invention provides it is a kind of mix reactive power compensator and mix reactive power compensator control method,
Middle mixing reactive power compensator is by using the mode that Passively compensated module and active compensation module are combined to three phase network
Power quality problem carry out comprehensive treatment, can be quickly more to System Reactive Power, harmonic wave, laod unbalance and harmonic wave overvoltage etc.
Kind power quality problem carries out comprehensive treatment, and can avoid overcompensation, effectively increases the reliability of system.
Description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 shows the functional block diagram of mixing reactive power compensator that the embodiment of the present invention is provided.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates the basic structure of the present invention, therefore it only shows composition related to the present invention.
First embodiment
Referring to Fig. 1, an embodiment of the present invention provides a kind of mixing reactive power compensator, mixing reactive power compensator is in parallel
It accesses in three phase network.The side that mixing reactive power compensator is combined by using Passively compensated module and active compensation module
Formula carries out comprehensive treatment to the power quality problem of three phase network.
Specifically, mixing reactive power compensator has further included detection module and control module；It is active compensation module, passive
Compensating module is accessed by detection module parallel connection in three phase network respectively；Control module respectively with active compensation module, passive benefit
It repays module and detection module is electrically connected；Detection module is also adapted to detect for three phase network with the electric connection of active compensation module
Current analog signal is simultaneously sent to control module and active compensation module；Active compensation module is suitable for according to the electric current received
After analog signal carries out active compensation, harmonic wave control to three phase network, control module is suitable for the current analog signal to receiving
It calculates the reactive current information of three phase network and is sent to active compensation module；Active compensation module is further adapted for what foundation received
Reactive current information controls Passively compensated module Passively compensated to three phase network progress by control module.Wherein, active compensation
Module uses SVG, and fast response time detects no-power vacancy and harmonic current, dynamic tracing compensation in real time.SVG is in real time to system
Idle, harmonic wave carries out quick fine compensation, the rejection rate efficient process that can be compensated the harmonic wave of different orders and be set by client
System harmonics electric current.
In the present embodiment, active compensation module accesses three phase network by the first breaker parallel connection, passes through the first open circuit
Device carries out real-time guard to three phase network lateral circuit.
In the present embodiment, Passively compensated module accesses three phase network by the second breaker parallel connection, passes through the second open circuit
Device carries out real-time guard to Passively compensated lateral circuit.
In the present embodiment, Passively compensated module include mending altogether capacitor, divide benefit capacitor or capacitive coupling device three it
In arbitrary two or three of combination (in Fig. 1 be three kinds of combinations all having).Capacitor is mended altogether, divides benefit capacitor and phase
Between in capacitor access three phase network in parallel；Capacitor is mended altogether to be suitable under the first fling-cut switch of control of control module to three
Phase power grid carries out three-phase compensation；Benefit capacitor is divided to be suitable for carrying out three phase network under the second fling-cut switch of control of control module
Single-phase compensation；And capacitive coupling device is suitable for carrying out imbalance to three phase network under the control third fling-cut switch of control module
Compensation.It first passes through after capacitive coupling device carries out three phase network imbalance compensation and uneven benefit is carried out by active compensation module again
It repays.Passively compensated module is combined by there is a grade switching to compensate, and with active compensation module, and realization power factor -1~
+ 1 arbitrary adjusting can realize that zero crosses benefit.
Wherein, detection module include be adapted to detect for three-phase electricity net side current analog signal the first current sensor and
Detect the second current sensor of the current analog signal of Passively compensated module side；First current sensor and active compensation module
It is electrically connected, and suitable for the current analog signal detected is sent to active compensation module；Second current sensor and control
Module is electrically connected, and suitable for the current analog signal detected is sent to control module.
In the present embodiment, mixing reactive power compensator further includes the display screen being electrically connected with control module；And it shows
Screen is suitable for the status information for showing that Passively compensated module is compensated with active compensation module, and wherein status information includes idle electricity
The running state information of stream information, Passively compensated module.It is convenient that the operating status for mixing reactive power compensator is checked.
In the present embodiment, mixing reactive power compensator further includes harmonic wave overvoltage protection device and over-pressed guarantor is carried out to device
Shield, it is ensured that system stable operation, mixing reactive power compensator further include arrester, protect electrical equipment against high transient overvoltage
Harm.
Second embodiment
An embodiment of the present invention provides a kind of control methods for mixing reactive power compensator.Mix the control of reactive power compensator
Method processed using active compensation and it is Passively compensated be combined by the way of Synthetic is carried out to the power quality problem of three phase network
Reason.
Wherein, the method for active compensation includes：Detect the current analog signal and voltage analog signal of three-phase electricity net side；According to
Active compensation is carried out to three phase network according to the current analog signal and voltage analog signal detected.First embodiment can be passed through
In the first current sensor and active compensation module realize, wherein, active compensation module uses SVG, and SVG is internally provided with one
Road network voltage analog signal sampling is used for collection voltages analog signal, by SVG in real time to System Reactive Power, harmonic wave and imbalance
Quick fine compensation is carried out, the rejection rate efficient process system harmonics electricity that the harmonic wave of different orders can be compensated and set by client
Stream.
In the present embodiment, Passively compensated control method includes：Detect the capacity of active compensation；When the appearance of active compensation
When amount reaches rated capacity, start to carry out three phase network Passively compensated.It can be passed by the second electric current in first embodiment
Sensor, Passively compensated module and control module are realized.
In the present embodiment, when the capacity of active compensation reaches rated capacity, start to carry out passive benefit to three phase network
The step of repaying further includes：Detect the current analog signal and voltage analog signal of Passively compensated side；Calculate the idle of three phase network
Current information；Carry out imbalance compensation, three-phase compensation and single-phase to three phase network successively according to the reactive current information that obtains
Divide and mend.The second current sensor, control module, active compensation module and the Passively compensated mould in first embodiment can be passed through
Block realizes that Passively compensated module is combined by there is a grade switching to compensate, and with active compensation module, realize power because
The arbitrary adjusting of number -1~+1 can realize that zero crosses benefit.
Specifically, the method for imbalance compensation includes：
When the active content of three-phase electricity net side is more than permissible value, and to be respectively less than setting value, three-phase active not for three-phase activity coefficient
When coefficient of balance is more than permissible value, opens capacitive coupling device and imbalance compensation is carried out to three phase network.
When the active maximum value of three-phase and the active average value difference of three-phase are more than the active average value of three-phase and the active minimum of three-phase
The difference of value, capacitive coupling device increase corresponding capacitive coupling and carry out imbalance compensation to three phase network.That is, the active maximum value of three-phase
For A phases, then plus AB capacitive couplings are thrown, the active maximum value of three-phase is B phases, then plus throws BC capacitive couplings, the active maximum value of three-phase is C
Phase then adds and throws CA capacitive couplings.
When the active maximum value of three-phase and the active average value difference of three-phase are less than the active average value of three-phase and the active minimum of three-phase
The difference of value, capacitive coupling device increase corresponding capacitive coupling and carry out imbalance compensation to three phase network.That is, the active minimum value of three-phase
For A phases, then plus CA capacitive couplings are thrown, the active minimum value of three-phase is B phases, then plus throws AB capacitive couplings, the active minimum value of three-phase is C
Phase then adds and throws BC capacitive couplings
When the active unbalance factor of three-phase is less than permissible value, stops capacitive coupling device and uneven benefit is carried out to three phase network
It repays.
When active difference between phase and phase is more than the capacity of capacitive coupling, stop corresponding capacitive coupling to three phase network
Carry out imbalance compensation.That is, the active A phases that subtract of B phases are active more than capacitive coupling capacity, then AB capacitive couplings are cut off, C phases are active to be subtracted
B phases are active to be more than capacitive coupling capacity, then cuts off BC capacitive couplings, and A phase be active, and to subtract C phases active more than capacitive coupling capacity, then
Cut off CA capacitive couplings.
The method of three-phase compensation includes：
When the three-phase of three-phase electricity net side is in perceptual state, the reactive power of three-phase electricity net side is all higher than one group and mends electricity altogether
During the capacity of appearance, one group of throwing is added to mend capacitance altogether, three-phase compensation is carried out to three phase network.
When the three-phase of three-phase electricity net side is in capacitive state, the idle surplus of three-phase of active compensation output is all higher than arbitrarily
One group mend capacitance altogether capacity when, stop one group mend altogether capacitance to three phase network carry out three-phase compensation.
When the three-phase of active compensation output is idle is perception, stops one group and mend capacitance altogether to three phase network progress three-phase
It mends altogether.
The method of single-phase compensation includes：
When the idle appearance for being more than component benefit capacitance with the idle minimum difference of three-phase inlet wire of three-phase electricity net side two-phase inlet wire
During amount, increase corresponding point and mend capacitance to three phase network progress single-phase compensation.If minimum that C phase enter line sides are idle, as A subtracts each other C phase nothings
The difference of work(is more than a point capacity for benefit capacitance, then puts into point benefit capacitance of A phases, is more than a point benefit electricity as B subtracts each other the idle difference of C phases
The capacity of appearance then puts into point benefit capacitance of B phases.
When a certain mutually idle rated value of active compensation output and the difference of the idle output valve in the phase for carrying out single-phase compensation
When value mends the capacity of capacitance more than a component, stop single-phase compensation of point benefit capacitance to three phase network of corresponding phase.As A phases point are mended
Capacitor has been thrown, when the idle rated value of A phases of active compensation output and the difference of the idle real output value of A phases of SVG are more than one
Component mends the capacity of capacitance, then cuts off A phase point benefit capacitors.
In conclusion an embodiment of the present invention provides a kind of controls for mixing reactive power compensator and mixing reactive power compensator
Method processed, wherein, the mode that mixing reactive power compensator is combined by using Passively compensated module and active compensation module
Reactive-load compensation is carried out to three phase network.Carry out active compensation by using SVG, in real time to System Reactive Power, harmonic wave with it is uneven into
The quick fine compensation of row has been carried out grade switching using Passively compensated module and compensated, tied using SVG and Passively compensated module
It closes, realizes the arbitrary adjusting of power factor -1~+1, to realize that zero crosses benefit.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or one
Connect to body；Can be mechanical connection or electrical connection；It can be directly connected, it can also be indirect by intermediary
It is connected, can is the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need to that it is further defined and explained in subsequent attached drawing.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of mixing reactive power compensator, which is characterized in that
The mixing reactive power compensator is by using the mode that Passively compensated module and active compensation module are combined to three
The power quality problem of phase power grid carries out comprehensive treatment.
2. mixing reactive power compensator as described in claim 1, which is characterized in that
The mixing reactive power compensator has further included detection module and control module；
The active compensation module, the Passively compensated module are accessed by the detection module parallel connection in three phase network respectively；
The control module electrically connects respectively with the active compensation module, the Passively compensated module and the detection module
It connects；
The detection module is also adapted to detect for the current analog signal of three phase network simultaneously with active compensation module electric connection
It is sent to the control module and the active compensation module；
The active compensation module is suitable for controlling three phase network progress active compensation, harmonic wave according to the current analog signal received
After reason, the control module is suitable for calculating the reactive current information of three phase network to the current analog signal received and be sent to
The active compensation module；
The active compensation module is further adapted for controlling the nothing by the control module according to the reactive current information received
Source compensating module carries out three phase network Passively compensated.
3. mixing reactive power compensator as claimed in claim 2, which is characterized in that
The Passively compensated module includes mending capacitor altogether, is divided among benefit capacitor or capacitive coupling device three arbitrary two kinds or three
The combination of kind；
It is described to mend altogether in capacitor, described point of benefit capacitor and the capacitive coupling device access three phase network in parallel；
The capacitor of mending altogether is suitable under the first fling-cut switch of control of the control module being total to three phase network progress three-phase
It mends；
Described point of benefit capacitor is suitable for carrying out single-phase point to three phase network under the second fling-cut switch of control of the control module
It mends；And
The capacitive coupling device is suitable under the control third fling-cut switch of the control module carrying out three phase network uneven
Compensation.
4. mixing reactive power compensator as claimed in claim 2, which is characterized in that
The detection module includes being adapted to detect for the first current sensor and the detection of the current analog signal of three-phase electricity net side
Second current sensor of the current analog signal of the Passively compensated module side；
First current sensor is electrically connected with the active compensation module, and the current analog signal suitable for will detect
It is sent to the active compensation module；
Second current sensor is electrically connected with the control module, and suitable for the current analog signal detected is sent
To the control module.
5. mixing reactive power compensator as claimed in claim 2, which is characterized in that
The mixing reactive power compensator further includes the display screen being electrically connected with the control module；And the display screen is suitable for
Show the status information that the Passively compensated module is compensated with active compensation module.
6. a kind of control method for mixing reactive power compensator, which is characterized in that
It is described mixing reactive power compensator control method using active compensation and it is Passively compensated be combined by the way of to three-phase
The power quality problem of power grid carries out comprehensive treatment.
7. the control method of mixing reactive power compensator as claimed in claim 6, which is characterized in that
The method of the active compensation includes：
Detect the current analog signal and voltage analog signal of three-phase electricity net side；
Active compensation, harmonic wave control are carried out to three phase network according to the current analog signal and voltage analog signal detected.
8. the control method of mixing reactive power compensator as claimed in claim 7, which is characterized in that
The Passively compensated control method includes：
Detect the capacity of active compensation；
When the capacity of active compensation reaches rated capacity, start to carry out three phase network Passively compensated.
9. the control method of mixing reactive power compensator as claimed in claim 8, which is characterized in that
It is described when the capacity of active compensation reaches rated capacity, start to carry out Passively compensated method to three phase network to include：
Detect the current analog signal and voltage analog signal of Passively compensated side；
Calculate the reactive current information of three phase network；
Imbalance compensation, three-phase compensation and single-phase compensation are carried out to three phase network successively according to the reactive current information obtained.
10. the control method of mixing reactive power compensator as claimed in claim 9, which is characterized in that
The method of the imbalance compensation includes：
When the active content of three-phase electricity net side is more than permissible value, and three-phase activity coefficient is respectively less than the active imbalance of setting value, three-phase
When coefficient is more than permissible value, opens capacitive coupling device and imbalance compensation is carried out to three phase network；
When the active maximum value of three-phase and the active average value difference of three-phase are more than the active average value of three-phase and the active minimum value of three-phase
Difference, capacitive coupling device increase corresponding capacitive coupling and carry out imbalance compensation to three phase network；
When the active maximum value of three-phase and the active average value difference of three-phase are less than the active average value of three-phase and the active minimum value of three-phase
Difference, capacitive coupling device increase corresponding capacitive coupling and carry out imbalance compensation to three phase network；
When the active unbalance factor of three-phase is less than permissible value, stops capacitive coupling device and imbalance compensation is carried out to three phase network；
When active difference between phase and phase is more than the capacity of capacitive coupling, stops corresponding capacitive coupling and three phase network is carried out
Imbalance compensation；
The method of the three-phase compensation includes：
When the three-phase of three-phase electricity net side is in perceptual state, the reactive power of three-phase electricity net side is all higher than one group and mends capacitance altogether
During capacity, one group of throwing is added to mend capacitance altogether, three-phase compensation is carried out to three phase network；
When the three-phase of three-phase electricity net side is in capacitive state, the idle surplus of three-phase of active compensation output is all higher than any one group
When mending the capacity of capacitance altogether, stop one group and mend capacitance altogether to three phase network progress three-phase compensation；
When the three-phase of active compensation output is idle is perception, one group of stopping mends capacitance and three phase network progress three-phase is total to altogether
It mends；
The method of the single-phase compensation includes：
During the capacity for being more than component benefit capacitance with the idle minimum difference of three-phase inlet wire when three-phase electricity net side two-phase inlet wire is idle,
Increase corresponding point and mend capacitance to three phase network progress single-phase compensation；
When a certain mutually idle rated value and the difference of the idle output valve in the phase for carrying out single-phase compensation of active compensation output are big
When a component mends the capacity of capacitance, stop single-phase compensation of point benefit capacitance to three phase network of corresponding phase.
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