CN106786634A - A kind of static reacance generator and its multiple target capacity control method for coordinating - Google Patents
A kind of static reacance generator and its multiple target capacity control method for coordinating Download PDFInfo
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- CN106786634A CN106786634A CN201710214129.6A CN201710214129A CN106786634A CN 106786634 A CN106786634 A CN 106786634A CN 201710214129 A CN201710214129 A CN 201710214129A CN 106786634 A CN106786634 A CN 106786634A
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
-
- 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
- Y02E40/30—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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a kind of static reacance generator and its multiple target capacity control method for coordinating.The static reacance generator, including reactor, Three-Phase Voltage PWM Converter, drive circuit, controller and host computer and man-machine interface.The primary side of reactor is connected with three phase network, and secondary is connected with Three-Phase Voltage PWM Converter；Controller gathers associated voltage and current value, and driving instruction is sent after analyzing and processing to drive circuit, drives Three-Phase Voltage PWM Converter, controller to be communicated with man-machine interface with host computer.The present invention can reduce the expense of secondary input, equipment can compensating reactive power, regulation three-phase imbalance, harmonics restraint, moreover it is possible to adjust busbar voltage, it is to avoid busbar voltage is too high, and reactive power crosses benefit or deficient complementarity problem；The dynamic capacity of static reacance generator is made full use of, multiple target reasonable compensation is realized.
Description
Technical field
The present invention relates to power network Power quality management technical field, and in particular to a kind of static reacance generator and its many mesh
Mark capacity control method for coordinating.
Background technology
Electric energy is that the important substance of socio-economic development ensures, because a large amount of non-linear and impact loads access power network,
Produced power quality problem seriously threatens the safe and stable operation of whole power network and each electricity supply and use equipment.Current China is most
Five new quality of power supply national standards include：Supply voltage deviation, voltage fluctuation and flicker, power system frequency deviation, three
Phase voltage is uneven, utility network m-Acetyl chlorophosphonazo.Design of the issue of these standards to harmonics restraint and reactive-load compensation equipment is provided
Reliable foundation and reference.
Requirement more and more higher along with power consumer to the quality of power supply, often needs for power quality controlling equipment
Will or even negative phase-sequence idle to harmonic wave simultaneously compensate.It is the current master for applying to administer harmonic wave and compensating reactive power using passive device
Stream, but the Passively compensated harmonic wave that can only be considered except specific times, easily with power network generation resonance, volume is big, loss is big, reactive power
Can only grading compensation, not only compensation speed is slow, impact is big, compensation precision is low, is also easy to occur to mend and owe to mend, it is intelligent very
Difference.In modern power network, voltage pulsation, idle not enough, harmonic wave are transfinited, the power quality problem of three-phase imbalance can be while deposit
, it is necessary to different types of improvement and control device are solved.Active compensation equipment is because its superior compensation performance is obtained
Increasing application.
Active compensation is divided into Active Power Filter-APF (APF) and static reacance generator (SVG) again, in most cases divides
Harmonic wave and reactive power that Yong Lai be in compensation network, even being also using First Harmonic Reactive Power and all for comprehensive compensation
The compensating form of harmonic wave.The capacity of active power compensator be all relatively it is limited, can not be very in the case where installed capacity is limited
Good carrying out is purposeful, have the compensation of emphasis, it is impossible to take into full account the reasonable distribution of installed capacity, often device does not reach optimal
Compensation effect, the adaptability simultaneously for different operating modes is also limited.According to the control mode of active compensation, grid side power because
Up to more than 0.98, this can raise grid side voltage magnitude to number to a certain extent, have a negative impact to electrical equipment.This
Outward, the uncertainty of power load, causes mounted compensation equipment to reach compensation effect well, it is necessary to secondary throwing
Enter, increased control expense.
The content of the invention
It is an object of the invention to provide a kind of static reacance generator and its multiple target capacity control method for coordinating, it is used to
Reactive power, harmonic wave and negative phase-sequence imbalance can only be compensated respectively in active compensation in the existing power network of solution, and can not be taken into full account
The problems such as reasonable distribution of installed capacity.
To achieve the above object, the present invention provides a kind of static reacance generator, and the static reacance generator includes electricity
Anti- device, Three-Phase Voltage PWM Converter, drive circuit, controller and host computer and and man-machine interface；
The reactor is used for energy storage and filters high frequency switching ripple electric current, and the primary side of the reactor is connected with power network
Connect, secondary is connected with the Three-Phase Voltage PWM Converter；
The AC of the Three-phase PWM Voltage Rectifier is connected with the reactor, DC side connection storage capacitor, institute
State storage capacitor and store the DC energy produced through the Three-phase PWM Voltage Rectifier；
The drive circuit receives the control signal that the controller sends, and drives the Three-Phase Voltage PWM Converter
Semiconductor power device；
The DC voltage value of the controller collection Three-Phase Voltage PWM Converter, and grid side three-phase voltage,
Three-phase electricity flow valuve, sends driving instruction to the drive circuit after analyzing and processing, meanwhile, the voltage electricity that the controller will be gathered
Flow valuve is sent to the host computer and man-machine interface, receives the instruction that the host computer sends with man-machine interface.
Further, the Three-phase PWM Voltage Rectifier is made up of igbt, is sweared using voltage space
Amount modulation technique drives the igbt to produce compensation current waveform.
Further, the Three-phase PWM Voltage Rectifier uses three-phase full-controlled bridge topological form.
Further, the host computer and man-machine interface are industrial computer, PLC or display screen.
The present invention also provides a kind of multiple target capacity control method for coordinating based on static reacance generator, specifically, institute
Control method for coordinating is stated to comprise the following steps：
Step 1. collection mains voltage signal, load current signal, static reacance generator current signal；
Step 2. calculates the phaselocked loop angle of the line voltage；
Step 3. extracts reactive component, harmonic component and the negative sequence component of the load current, calculates the work(of the load
Rate factor PF, determines busbar voltage lower limit；
Step 4. extracts reactive component, harmonic component, the negative sequence component of static reacance generator；
Step 5. according to idle priority principle, as the power factor PF<When 0.92, compensating power makes the load
Power factor PF be more than or equal to 0.92；
Step 6. when busbar voltage be less than the busbar voltage lower limit when, compensating power so that busbar voltage is not small
In the busbar voltage lower limit；
Whether step 7. judges the super GB of primary current harmonic wave of load-side 5,7,11, if exceeding national standard, compensation is described
5,7,11 primary current harmonic waves of load-side；
Whether step 8. judges the super GB of three-phase current unbalance degree, if exceeding national standard, compensates the load
Negative-sequence current.
Further, the specific method of compensating power is as follows in the step 5 and step 6：
Using the reactive component of the load current as set-point, the reactive component of the static reacance generator is used as anti-
Feedback value, carries out PID (PID) closed-loop control under synchronous rotating frame, realizes the reactive-load compensation to loading, and
Compensation target reaches 0.92 for power factor, if now grid side voltage is less than being actually needed, needs to continue to increase idle defeated
Output, requires until grid side voltage meets.
Further, the specific method that 5,7,11 primary current harmonic waves of the load-side are compensated in the step 7 is as follows：
Using the harmonic component of the load current as set-point, the harmonic component of the static reacance generator is used as anti-
Feedback value, uses repetitive control under synchronous rotating frame, obtains the output quantity size for needing compensation, realizes to described negative
The current harmonics compensation of load.
Further, the specific method that the negative-sequence current of the load is compensated in the step 8 is as follows：
Using the negative sequence component of the load current as set-point, the negative sequence component of the static reacance generator is used as anti-
Feedback value, uses PID closed-loop controls under synchronous rotating frame, obtains the output quantity size for needing compensation, realizes to described negative
The negative sequence compensation of load.
Further, when active device capacity is by limited time, the mode that adoption rate reduces limits the compensation output quantity
Size.
The inventive method has the following advantages that：
One equipment of static reacance generator disclosed by the invention can compensating reactive power, regulation three-phase imbalance, harmonic wave suppression
System, moreover it is possible to adjust busbar voltage；The multiple target compensation of reactive power, harmonic wave, three-phase imbalance is realized, a tractor serves several purposes is realized,
Reduce the expense of secondary input, it is to avoid interfere problem, in the occasion of limited space increased security.
Multiple target capacity control method for coordinating amount of calculation disclosed by the invention is small, and shared memory space is small, it is easy to accomplish；Can
According to specific operating mode, the compensation capacity of flexible Configuration Online reactive power, harmonic wave and negative-sequence current.Busbar voltage is included idle
In the control targe of compensation, effectively realize the reasonable compensation of reactive power, it is to avoid busbar voltage is too high, reactive power cross benefit or
Owe complementarity problem.
In the case of static reacance generator power system capacity is restricted, its dynamic capacity is made full use of, can multiple target association
Tune is compensated.
Brief description of the drawings
Fig. 1 is static reacance generator structural representation in the embodiment of the invention.
Fig. 2 is the principle schematic of static reacance generator in another specific embodiment of the invention.
Fig. 3 is the multiple target capacity control method for coordinating based on static reacance generator in the embodiment of the invention
Schematic flow sheet.
Specific embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
Embodiment 1
As depicted in figs. 1 and 2, a kind of static reacance generator, including reactor 1, Three-Phase Voltage PWM Converter 2, drive
Dynamic circuit 3, controller 4 and host computer and man-machine interface 5.
Reactor 1 is used for energy storage and filters high frequency switching ripple electric current, and the primary side of reactor 1 is connected with power network, secondary
It is connected with Three-Phase Voltage PWM Converter 2.
Three-phase PWM Voltage Rectifier 2 uses three-phase full-controlled bridge topological form, AC to be connected with three-phase reactor 1, directly
Stream side connection storage capacitor.Three-phase PWM Voltage Rectifier 2 is made up of igbt (IGBT), empty using voltage
Between Vector Modulation (SVPWM) technology humanized IGBT produce compensation current waveform, storage capacitor store through IGBT power conversion modules
The DC energy of generation.
Drive circuit 3 receives the control signal that controller 4 sends, and drives the semiconductor work(of Three-Phase Voltage PWM Converter 2
Rate device, it also takes into account the defencive function to semiconductor power device.
Controller 4 gathers the DC voltage value of Three-Phase Voltage PWM Converter 2, and three-phase electricity net side three-phase voltage, three
Phase current values, send driving instruction to drive circuit 3, meanwhile, controller 4 is also responsible for the communication with host computer and man-machine interface,
The various voltages for gathering, current value are sent to host computer and man-machine interface 5, receive the finger that host computer sends with man-machine interface 5
Order.
Host computer can use the modes such as industrial computer, PLC or display screen realize with man-machine interface 5, facilitate operating personnel couple
The monitoring of whole system and control.
Static reacance generator disclosed in the present embodiment (SVG) can be used alone, or active and Passively compensated equipment
Hybrid collocation structure, such as TSC+SVG, FC+SVG etc..
One equipment of the present embodiment can compensating reactive power, regulation three-phase imbalance, harmonics restraint, moreover it is possible to adjust bus electricity
Pressure；The multiple target compensation of reactive power, harmonic wave, three-phase imbalance is realized, a tractor serves several purposes is realized, taking for secondary input is reduced
With, it is to avoid problem is interfered, in the occasion of limited space security is increased.
Embodiment 2
In modern power network, the extensive application of the inductive load such as motor so that the characteristics of power network generally has perception, therefore
The present embodiment discussion compensates the situation of inductive load.Harmonic wave situation according to most of site of deployment, 5,7,11 subharmonic contents
At most, it is that comprehensive compensation saves capacity, the present embodiment is only compensated to 5,7,11 subharmonic.Due to the presence of inductive reactive power,
So that power network current increases, voltage drop increase, voltage on line side reduction, by compensating the reactive power that load is produced, can improve net
Side voltage, but voltage on line side also can not be too high.To avoid voltage on line side too high, reactive power output quantity can be suitably reduced, this
Sample power factor can be compensated to 1.Generally, to avoid idle fine, power factor reaches 0.9 and just meets and requires
, it is contemplated that loss of transformer etc., the present embodiment power factor setting compensation to 0.92.
A kind of multiple target capacity control method for coordinating based on static reacance generator, to the reactive power of power network, 5,7,
11 subharmonic, and three-phase current unbalance is compensated, and its method flow is as shown in figure 3, specifically, the method includes as follows
Step：
S1. mains voltage signal, load current signal, static reacance generator current signal are gathered.
S2. the phaselocked loop angle of line voltage is calculated.
S3. extract reactive component, harmonic component and the negative sequence component of the load current, calculate the power of the load because
Number PF, determines busbar voltage lower limit.
In busbar voltage requirement occasion higher, using power factor and busbar voltage to jointly control mode defeated to control
Go out the size of reactive power, it is ensured that solve reactive power problem under different operating modes.The big I of busbar voltage lower limit is according to specific
Site of deployment is set online.
S4. reactive component, harmonic component, the negative sequence component of static reacance generator are extracted.
S5. according to idle priority principle, as the power factor PF<When 0.92, compensating power makes the load
Power factor PF is more than or equal to 0.92.
S6. when busbar voltage is less than the busbar voltage lower limit, compensating power so that busbar voltage is not less than institute
State busbar voltage lower limit.
Using the reactive component of load current as set-point, the reactive component of static reacance generator as value of feedback,
PID (PID) closed-loop control is carried out under synchronous rotating frame, the reactive-load compensation to loading, and compensation target is realized
For power factor reaches 0.92, if now grid side voltage is less than being actually needed, need to continue to increase without work output, until
Grid side voltage meets requirement.
S7. when the primary current harmonic wave of load-side 5,7,11 exceedes GB, then 5,7,11 primary currents of the load-side are compensated
Harmonic wave.
Using the harmonic component of load current as set-point, the harmonic component of static reacance generator as value of feedback,
Repetitive control is used under synchronous rotating frame, the output quantity size for needing compensation is obtained, the electricity to the load is realized
Stream harmonic compensation.
S8. when three-phase current unbalance degree exceedes GB, then the negative-sequence current of the load is compensated.
Using the negative sequence component of load current as set-point, the negative sequence component of static reacance generator as value of feedback,
PID closed-loop controls are used under synchronous rotating frame, the output quantity size for needing compensation is obtained, the negative phase-sequence to the load is realized
Compensation.
Compensation method in the present embodiment based on the electric current detecting method based on instantaneous reactive power theory, with reference to straight
The PI control algolithms of the direct proportional integral PI control algolithms and compensation electric current of side voltage under synchronous rotating frame are flowed, is obtained
Need the controlled quentity controlled variable of modulation.
When active device capacity is by limited time, the mode that adoption rate reduces limits compensation output quantity.
In the present embodiment method implementation procedure, idle, harmonic wave, the priority of negative phase-sequence three are arranged in order, only in power
In the case that factor and busbar voltage meet the requirements, harmonic compensation function could be opened, otherwise device by uncompensation load it is humorous
Ripple and negative-sequence current, negative sequence compensation function could be opened after similarly only harmonic wave meets GB.
Three kinds of reactive-load compensations of the present embodiment, harmonics restraint, negative sequence compensation individually can enable to adapt to difference as needed
Scene needs.
The present embodiment is according to specific operating mode, the compensation capacity of flexible Configuration Online reactive power, harmonic wave and negative-sequence current.Will
Busbar voltage is included in the control targe of reactive-load compensation, effectively realizes the reasonable compensation of reactive power, it is to avoid is crossed and is mended or owe to mend.
Although the present invention is described in detail above to have used general explanation and specific embodiment, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements, belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (9)
1. a kind of static reacance generator, the static reacance generator includes reactor, Three-Phase Voltage PWM Converter, drive
Dynamic circuit, controller and host computer and man-machine interface, it is characterised in that
The reactor is used for energy storage and filters high frequency switching ripple electric current, and the primary side of the reactor is connected with power network, secondary
While being connected with the Three-Phase Voltage PWM Converter；
The AC of the Three-phase PWM Voltage Rectifier is connected with the reactor, DC side connection storage capacitor, the storage
Energy electric capacity stores the DC energy produced through the Three-phase PWM Voltage Rectifier；
The drive circuit receives the control signal that the controller sends, and drives the half of the Three-Phase Voltage PWM Converter
Conductor power device；
The controller gathers the DC voltage value of the Three-Phase Voltage PWM Converter, and grid side three-phase voltage, three-phase
Current value, sends driving instruction to the drive circuit after analyzing and processing, meanwhile, the voltage x current value that the controller will be gathered
The host computer and man-machine interface are sent to, receive the instruction that the host computer sends with man-machine interface.
2. static reacance generator as claimed in claim 1, it is characterised in that the Three-phase PWM Voltage Rectifier is by exhausted
Edge grid bipolar transistor is constituted, and drives the igbt to produce compensation electricity by Space Vector Pulse Width Modulation
Stream waveform.
3. static reacance generator as claimed in claim 2, it is characterised in that the Three-phase PWM Voltage Rectifier is used
Three-phase full-controlled bridge topological form.
4. static reacance generator as claimed in claim 1, it is characterised in that the host computer is industry control with man-machine interface
Machine, PLC or display screen.
5. a kind of multiple target capacity control method for coordinating based on static reacance generator, it is characterised in that the coordination control
Method comprises the following steps：
Step 1. collection mains voltage signal, load current signal, static reacance generator current signal；
Step 2. calculates the phaselocked loop angle of the line voltage；
Step 3. extracts reactive component, harmonic component and the negative sequence component of the load current, calculate the power of the load because
Number PF, determines busbar voltage lower limit；
Step 4. extracts reactive component, harmonic component, the negative sequence component of static reacance generator；
Step 5. according to idle priority principle, as the power factor PF<When 0.92, compensating power makes the work(of the load
Rate factor PF is more than or equal to 0.92；
Step 6. when busbar voltage be less than the busbar voltage lower limit when, compensating power so that busbar voltage be not less than institute
State busbar voltage lower limit；
Whether step 7. judges the super GB of primary current harmonic wave of load-side 5,7,11, if exceeding national standard, compensates the load
5,7,11 primary current harmonic waves of side；
Whether step 8. judges the super GB of three-phase current unbalance degree, if exceeding national standard, compensates the negative phase-sequence of the load
Electric current.
6. multiple target capacity control method for coordinating as claimed in claim 5, it is characterised in that in the step 5 and step 6
The specific method of compensating power is as follows：
Using the reactive component of the load current as set-point, the reactive component of the static reacance generator is used as feedback
Value, carries out PID closed-loop controls under synchronous rotating frame, realizes the reactive-load compensation to loading, and compensation target be power because
Number reaches 0.92, if now grid side voltage is less than being actually needed, needs to continue to increase without work output, until grid side electricity
Pressure meets requirement.
7. multiple target capacity control method for coordinating as claimed in claim 5, it is characterised in that compensated in the step 7 described
The specific method of 5,7,11 primary current harmonic waves of load-side is as follows：
Using the harmonic component of the load current as set-point, the harmonic component of the static reacance generator is used as feedback
Value, uses repetitive control under synchronous rotating frame, obtains the output quantity size for needing compensation, realizes to the load
Current harmonics compensation.
8. multiple target capacity control method for coordinating as claimed in claim 5, compensates the negative of the load in the step 8
The specific method of sequence electric current is as follows：
Using the negative sequence component of the load current as set-point, the negative sequence component of the static reacance generator is used as feedback
Value, uses PID closed-loop controls under synchronous rotating frame, obtains the output quantity size for needing compensation, realizes to the load
Negative sequence compensation.
9. the multiple target capacity control method for coordinating as described in claim any one of 6-8, it is characterised in that when active device holds
Amount by limited time, adoption rate reduce mode come limit it is described compensation output quantity size.
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| CN107800144A (en) * | 2017-11-17 | 2018-03-13 | 国网山东省电力公司荣成市供电公司 | A kind of micro grid control system and its control method |
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| CN110445140A (en) * | 2019-08-15 | 2019-11-12 | 上海电气集团股份有限公司 | A kind of power quality equipment self-adaptation control method based on three-dimensional freedom |
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