CN105932687A - Smart reactive power compensation system - Google Patents
Smart reactive power compensation system Download PDFInfo
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- CN105932687A CN105932687A CN201610390877.5A CN201610390877A CN105932687A CN 105932687 A CN105932687 A CN 105932687A CN 201610390877 A CN201610390877 A CN 201610390877A CN 105932687 A CN105932687 A CN 105932687A
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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
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a smart reactive power compensation system. According to the smart reactive power compensation system, clean energy generating sets and SVC devices can be monitored together; reactive power compensation can be dynamically and smartly adjusted by taking monitoring information as information sources; therefore, the powers and voltages of grid-connected points are smoothed; and the economic operation of the clean energy generating sets is maintained and improved.
Description
Art
The present invention relates to a kind of intelligent powerless compensation system.
Background technology
Along with China's power system equipment development and strategic demand, distance, on a large scale, high electricity
Supertension and the UHV transmission network of pressure gradually form, and as weighing the safety and economic operation of power network
The quality of voltage of important indicator, is caused the important shadow of active power loss by the unconventional conveying of reactive power source
Ring.Reactive power compensation is to apply reactive power regulation measure to improve power system reactive power distribution in power system
And voltage levvl, thus reduce loss and the method for power transmission and transformation line power attenuation between area power grid.Therefore,
In power system, reactive power compensating apparatus and device have extremely important effect, distribute compensation equipment rationally
And device, not only can reduce grid loss, improve power supply quality, moreover it is possible to effectively solve system voltage fluctuation
Problem with harmonic wave.
Along with the fast development of clean energy resource, the extensive concentration of wind-powered electricity generation is accessed the electrical network higher requirement of proposition.
In the case of adverse circumstances or operation constraints increase, line voltage, three-phase imbalance, current distortion
And power factor is on the low side etc., and problem can loom large, the level of security of TRT can reduce step by step.Soft
In sexual intercourse flow control device, SVC is most widely used general, the most ripe idle and voltage control apparatus in electrical network
, can quick compensating reactive power and maintenance line voltage.
A kind of method of traditional compensation harmonic and reactive current is installing reactive-load compensation equipment, generally by electric power
Capacitor, reactor and resistor string parallel combination form.The Reactive-power control equipment that China is conventional at present is still
Mechanical type shunt reactor, switched capacitor, these silent oscillation pressure regulation means, because regulation is discontinuous, response
Speed is slow, is difficult to meet demand during system operation mode Rapid Variable Design.
Summary of the invention
The present invention provides a kind of intelligent powerless compensation system, and this intelligent powerless compensation system can be by cleaning energy
Source generating set and SVC equipment are monitored in the lump, and regulate reactive-load compensation as information source dynamic and intelligent, from
And realize smooth and site power and voltage, maintain the economical operation improving clean energy resource TRT.
To achieve these goals, the present invention provides a kind of intelligent powerless compensation system, this intelligent powerless compensation
System includes:
TRT, for green energy resource is converted into electric energy, this clean energy resource TRT is multiple；
SVC equipment, provides reactive power, to maintain the steady of grid-connected voltage for the also site at TRT
Fixed, this SVC equipment is multiple, and with described TRT one_to_one corresponding；
Grid-connecting apparatus, for realizing being incorporated into the power networks between TRT and bulk power grid；
And supervising device；
This supervising device includes:
The communication bus that acquisition module, detection module, control module communicate with for described each module；
Described acquisition module, for receiving the voltage instruction that described bulk power grid control centre issues, and from described
Voltage instruction extracts grid-connected point voltage；
Described detection module, is used for receiving current grid-connected point voltage, and by described current grid-connected point voltage with pre-
If interval compares, detect the interval at described current grid-connected point voltage place；
Described control module, is used in the case of described current grid-connected point voltage is in properly functioning interval,
Control the SVC equipment of this TRT and correspondence thereof and enter local control model, and to described TRT and
The SVC equipment of its correspondence issues the grid-connected point voltage of described target, is controlled described grid-connected by reactive power compensation
Point voltage reaches the grid-connected point voltage of described target；
In the case of described current grid-connected point voltage is in misoperation interval, control this exception TRT
And the SVC equipment of correspondence enters and coordinates control model, according to reactive voltage sensitivity and, select to coordinate to send out
The SVC equipment of electric installation and correspondence thereof, controls the SVC equipment output of described coordination TRT and correspondence thereof
Reactive power, coordinates SVC equipment grid-connected of control model exception TRT and correspondence thereof to assist to be in
Point voltage reaches the grid-connected point voltage of described target；And it is in urgent Operational Zone at described current grid-connected point voltage
In the case of between, the SVC equipment controlling this TRT being in urgent traffic coverage and correspondence thereof enters tight
Anxious control model, machine is cut in employing or removal of load mode controls this grid-connected point voltage.
Preferably, described control module includes: the first control unit, is used for using below equation to calculate all
TRT is for being in the reactive voltage sensitivity coefficient matrix S:S=of the TRT coordinating control model
-(B″)-1V-1, wherein, the element S in reactive voltage sensitivity coefficient matrix SijGrid-connected for TRT i
The point voltage change sensitivity coefficient that also site reactive power changes to TRT j；B is " for described generating
The admittance matrix of circuit, matrix's reversibility in device cluster；V=diag (V1,V2,...,Vn) represent TRT machine
Terminal voltage, total n node；By the sensitivity coefficient S in reactive voltage sensitivity coefficient matrix SijAccording to
It is ranked up from big to small；Selected and sorted is at the TRT corresponding to sensitivity coefficient above and SVC thereof
Equipment is as described coordination TRT and SVC equipment thereof.
Preferably, described control module includes: the second control unit, for according to being in coordination control model
The current grid-connected point voltage of TRT and SVC equipment thereof and the difference of the grid-connected point voltage of described target, calculate
Described coordination TRT and SVC equipment thereof need the idle adjustment amount provided；To described coordination TRT
And SVC equipment issues the idle coordination control instruction carrying described idle adjustment amount, described coordination generates electricity
Device and SVC equipment thereof, according to described idle adjustment amount output reactive power, make to be in and coordinate control model
The grid-connected point voltage of TRT and SVC equipment thereof reaches the grid-connected point voltage of described target；Wherein, described association
Readjust the distribution electric installation and SVC equipment thereof according to described idle adjustment amount output reactive power after, present coordinate control
The grid-connected point voltage of molding formula TRT and wind energy turbine set corresponding to SVC equipment thereof is in properly functioning interval.
Preferably, described control module includes: the 3rd control unit, is used for when being in emergent control pattern,
Issuing after Reactive-power control instructs to being in emergent control pattern TRT or SVC equipment, detection reaches default
The action delay time, controlling the machine of cutting when being in emergent control pattern, removal of load, wherein, described presetting is moved
As delay time be more than described in be in TRT or the action cycle of SVC equipment of emergent control pattern, institute
State the action cycle be from described be in emergent control pattern time issue Reactive-power control and instruct TRT or SVC
The time of equipment execution action；Wherein, if grid-connected point voltage is in the given time always above setting
High level, confirms that reactive power compensation planning is used up, and grid-connecting apparatus cut-out is incorporated into the power networks with bulk power grid.
Preferably, the inverter circuit that main circuit is three-phase three brachium pontis of described SVC equipment, by 6 electric power electricity
Sub-device and DC bus capacitor composition.
Preferably, described SVC equipment uses the modulation system of space vector of voltage, for the ease of sitting at alpha-beta
Mark fastens directly control, the voltage pulsation caused when reducing switching switch, controls SVC output voltage vector and exists
In orthohexagonal inscribed circle, inscribed circle radius isudcRepresent the DC capacitor voltage of SVC.
Present invention have the advantage that (1) can be by monitoring, in time TRT and SVC equipment in the lump
Find grid-connected point voltage undulating value, and as information source dynamic reactive power, thus realize grid-connected point voltage
Stable；(2) preset traffic coverage, corresponding different control model for grid-connected point voltage, assist bulk power grid
Control centre completes the control to clean energy resource TRT jointly, coordinates to control the idle of each TRT
Exert oneself, on the basis of reducing reactive reserve, it is ensured that voltage keeps stable, improve area voltage levvl.
Accompanying drawing explanation
Fig. 1 shows the block diagram of a kind of intelligent powerless compensation system of the present invention；
Fig. 2 shows the flow chart of a kind of monitoring method of intelligent powerless compensation system.
Detailed description of the invention
Fig. 1 shows a kind of intelligent powerless compensation system 10 of the present invention, this intelligent powerless compensation system 10
Including: TRT 12, for green energy resource is converted into electric energy, this clean energy resource TRT 12 is many
Individual；SVC equipment 13, provides reactive power, to maintain grid-connected voltage for the also site at TRT
Stable, this SVC equipment 13 is multiple, and with described TRT 12 one_to_one corresponding；Grid-connecting apparatus 14,
For realizing being incorporated into the power networks between TRT and bulk power grid；With supervising device 11.
This supervising device 11 includes: acquisition module 112, detection module 113, control module 114 and for institute
State the communication bus 111 of each module communication；
Described acquisition module 112, for receiving the voltage instruction that described bulk power grid 20 control centre issues, and
Grid-connected point voltage is extracted from described voltage instruction；
Described detection module 113, is used for receiving current grid-connected point voltage, and by described current grid-connected point voltage and
Pre-set interval compares, and detects the interval at described current grid-connected point voltage place.
Described control module 114, for being in the situation in properly functioning interval at described current grid-connected point voltage
Under, the SVC equipment controlling this TRT and correspondence thereof enters local control model, and to described generating dress
Put and the SVC equipment of correspondence issues the grid-connected point voltage of described target, controlled by reactive power compensation described
Grid-connected point voltage reaches the grid-connected point voltage of described target；
In the case of described current grid-connected point voltage is in misoperation interval, control this exception TRT
And the SVC equipment of correspondence enters and coordinates control model, according to reactive voltage sensitivity and, select to coordinate to send out
The SVC equipment of electric installation and correspondence thereof, controls the SVC equipment output of described coordination TRT and correspondence thereof
Reactive power, coordinates the SVC equipment of control model exception TRT and correspondence thereof to assist control to be in
Grid-connected point voltage reaches the grid-connected point voltage of described target；And it is in urgent fortune at described current grid-connected point voltage
In the case of row interval, the SVC equipment controlling this TRT being in urgent traffic coverage and correspondence thereof enters
Entering emergent control pattern, machine is cut in employing or removal of load mode controls this grid-connected point voltage.
Preferably, described control module includes: the first control unit, is used for using below equation to calculate all
TRT coordinates the reactive voltage sensitivity coefficient matrix S:S=of control model TRT for being in
-(B″)-1V-1, wherein, the element S in reactive voltage sensitivity coefficient matrix SijGrid-connected for TRT i
The point voltage change sensitivity coefficient that also site reactive power changes to TRT j；B is " for described generating
The admittance matrix of circuit, matrix's reversibility in device cluster；V=diag (V1,V2,...,Vn) represent TRT machine
Terminal voltage, total n node；By the sensitivity coefficient S in reactive voltage sensitivity coefficient matrix SijAccording to
It is ranked up from big to small；Selected and sorted is at the TRT corresponding to sensitivity coefficient above and SVC thereof
Equipment is as described coordination TRT and SVC equipment thereof.
Preferably, described control module includes: the second control unit, for according to being in coordination control model
The current grid-connected point voltage of TRT and SVC equipment thereof and the difference of the grid-connected point voltage of described target, calculate
Described coordination TRT and SVC equipment thereof need the idle adjustment amount provided；To described coordination TRT
And SVC equipment issues the idle coordination control instruction carrying described idle adjustment amount, described coordination generates electricity
Device and SVC equipment thereof, according to described idle adjustment amount output reactive power, make to be in and coordinate control model
The grid-connected point voltage of TRT and SVC equipment thereof reaches the grid-connected point voltage of described target；Wherein, described association
Readjust the distribution electric installation and SVC equipment thereof according to described idle adjustment amount output reactive power after, present coordinate control
The grid-connected point voltage of molding formula TRT and wind energy turbine set corresponding to SVC equipment thereof is in properly functioning interval.
Preferably, described control module includes: the 3rd control unit, is used for when being in emergent control pattern,
Issuing after Reactive-power control instructs to being in emergent control pattern TRT or SVC equipment, detection reaches default
The action delay time, controlling the machine of cutting when being in emergent control pattern, removal of load, wherein, described presetting is moved
As delay time be more than described in be in TRT or the action cycle of SVC equipment of emergent control pattern, institute
State the action cycle be from described be in emergent control pattern time issue Reactive-power control and instruct TRT or SVC
The time of equipment execution action；Wherein, if grid-connected point voltage is in the given time always above setting
High level, confirms that reactive power compensation planning is used up, and grid-connecting apparatus cut-out is incorporated into the power networks with bulk power grid.
Preferably, the inverter circuit that main circuit is three-phase three brachium pontis of described SVC equipment, by 6 electric power electricity
Sub-device and DC bus capacitor composition.
Preferably, described SVC equipment uses the modulation system of space vector of voltage, for the ease of sitting at alpha-beta
Mark fastens directly control, the voltage pulsation caused when reducing switching switch, controls SVC output voltage vector and exists
In orthohexagonal inscribed circle, inscribed circle radius isudcRepresent the DC capacitor voltage of SVC.
Seeing accompanying drawing 2, the monitoring method of a kind of intelligent powerless compensation system of the present invention comprises the steps:
S1. supervising device acquisition module obtains the voltage instruction that bulk power grid control centre issues in real time, and from voltage
Instruction is extracted the grid-connected point voltage of target of each TRT, the grid-connected point voltage of target of the most each TRT
It is identical；
S2. supervising device receives the current grid-connected point voltage that each TRT is uploaded, and by current grid-connected point voltage
Compare with pre-set interval, detect the interval at current grid-connected point voltage place, to whole TRTs respectively
Detect the pre-set interval at its current grid-connected point voltage place, to determine the control model of correspondence；
If the most current grid-connected point voltage is in properly functioning interval, supervising device controls this TRT and enters
Local control model, and issue the grid-connected point voltage of target to the SVC equipment of this TRT He its correspondence, logical
Cross reactive power compensation to control the grid-connected point voltage of this TRT and reach the grid-connected point voltage of target；The most grid-connected
Point voltage is in properly functioning interval, represents that this TRT can be exported by own reactive, makes and site
Voltage reaches target voltage；
If it is interval that the most current grid-connected point voltage is in misoperation, supervising device controls abnormal TRT
And correspondence SVC equipment enters and coordinates control model, select to assist TRT according to reactive voltage sensitivity
And correspondence SVC equipment, control described coordination TRT and corresponding SVC equipment output reactive power thereof,
The grid-connected point voltage of target is reached with the grid-connected point voltage assisting control to be in the TRT coordinating control model；When
It is interval that front grid-connected point voltage is in misoperation, represents idle deficiency, and grid-connected point voltage is out-of-limit enters abnormal fortune
Row district, is difficult to make grid-connected point voltage reach target voltage by own reactive output, needs the association of other measures
Help；
If the most current grid-connected point voltage is in urgent traffic coverage, supervising device controls to be in urgent Operational Zone
Between TRT and SVC equipment enter emergent control pattern, use cut machine, the mode of removal of load controls
The grid-connected point voltage of this TRT.
Preferably, above-mentioned pre-set interval divides according to the grid-connected point voltage of TRT, properly functioning interval
ForMisoperation interval isOrUrgent traffic coverage
ForOrWherein, i represents the numbering of TRT, ViRepresent the grid-connected point voltage of TRT,
I represents the numbering of that value that generates electricity, and Vi represents the grid-connected point voltage of TRT,
Preferably, according to the interval residing for current grid-connected point voltage of TRT, can by TRT and
The control of the SVC equipment of its correspondence is divided into following three kinds of control models:
(1) local control model: now the grid-connected point voltage of TRT is in properly functioning interval, TRT
And the SVC equipment of correspondence performs the voltage instruction that supervising device issues；
(2) control model is coordinated: now the grid-connected point voltage of TRT is in misoperation interval, TRT
And the SVC equipment of correspondence performs the idle adjustment instruction that supervising device issues, for the district at TRT place
Territory electrical network provides reactive power support, until all TRTs and corresponding SVC equipment thereof are in local control model；
(3) emergent control pattern: now the grid-connected point voltage of TRT is in urgent traffic coverage, i.e. wind energy turbine set
Voltage control through this locality and coordinate to control still to can not get there is efficient recovery, deteriorate further and enter urgent operation
Interval, now should carry out emergent control to the SVC equipment of TRT and correspondence thereof.
Preferably, under local control model, the SVC equipment of TRT and correspondence thereof receives supervising device
The grid-connected point voltage desired value issued, and monitor the actual value of the current grid-connected point voltage of TRT in real time,
To the difference of desired value Yu actual value, ensureing that the grid-connected point voltage of TRT follows the tracks of the basis of target voltage
On, make the builtin voltage of the SVC of TRT and correspondence thereof obtain optimum.
Preferably, when the idle deficiency of the SVC equipment of certain TRT and correspondence thereof, its grid-connected point voltage is more
When limit enters misoperation interval, the SVC equipment of this TRT and correspondence thereof enters coordinates control model,
The variable capacity of this SVC equipment is uploaded to supervising device, and supervising device is according to reactive voltage sensitivity and each
TRT that the idle variable capacity of the SVC equipment of TRT and correspondence thereof selects to participate in coordinating to control and
The SVC equipment of its correspondence, is calculated by the voltage deviation value of the SVC equipment of out-of-limit TRT and correspondence thereof
Coordinate the idle adjustment amount of the SVC equipment of TRT and correspondence thereof, then issue idle adjustment amount to coordinating
The SVC equipment of TRT and correspondence thereof.
Preferably, choosing of the SVC equipment of coordination TRT and correspondence thereof, control target at region internal segment
Point voltage meets and requires also to be optimized, due to the randomness of clean energy resource, TRT cluster meritorious go out
Power can be continually changing, and the grid-connected point voltage of each TRT so can be caused ceaselessly to fluctuate, carrying out trend
The when of calculating, for the high-tension line of TRT cluster, its reactance value is often much larger than its resistance
Value, can obtain according to PQ decomposition method:
Δ Q=-VB " Δ V (1)
In formula (1), Δ Q is TRT the reactive power changing value of site output；B is " for TRT cluster
The admittance matrix of interior circuit, matrix's reversibility, matrix belongs to sparse type matrix；V=diag (V1,V2,...,Vn) represent
TRT set end voltage, total n node；Δ V is each node voltage variable quantity of region.By formula (1)
Can obtain:
Δ V=-(B ")-1V-1ΔQ (2)
Then in TRT cluster the SVC equipment of all TRTs and correspondence thereof to being in coordination control model
TRT and the reactive voltage sensitivity coefficient matrix S of SVC equipment of correspondence be:
S=-(B ")-1V-1 (3)
Element S in reactive voltage sensitivity coefficient matrix S in formula (3)ijGrid-connected point voltage for TRT i
Change TRT j's and the sensitivity coefficient of site reactive power change, its size and TRT node
Magnitude of voltage and network architecture parameters are relevant；SiiFor TRT voltage, TRT is adjusted idle sensitivity.
Preferably, the selection gist of the SVC equipment coordinating TRT and correspondence thereof is TRT and right
The SVC equipment answered size of numerical value in sensitivity coefficient matrix, the preferential substation selecting sensitivity big, tool
Body, can be by the sensitivity coefficient S in reactive voltage sensitivity coefficient matrix SijAccording to carrying out from big to small
Sequence, and selected and sorted is at the SVC equipment of the TRT corresponding to sensitivity coefficient above and correspondence thereof
As coordinating TRT and the SVC equipment of correspondence thereof.
Preferably, the SVC equipment output controlling described coordination TRT and correspondence thereof in step S4 is idle
Power, to assist to control the also site of the SVC equipment of TRT and the correspondence thereof being in coordination control model
Voltage reaches the grid-connected point voltage of target and may include that and coordinate the TRT of control model and right according to being in
The current grid-connected point voltage of the SVC equipment answered and the difference of the grid-connected point voltage of target, calculate described coordination and generate electricity
The SVC equipment of device and correspondence thereof needs the idle adjustment amount provided；To described coordination TRT and right
The SVC equipment answered issues the idle coordination control instruction carrying idle adjustment amount, described coordination TRT
And the SVC equipment of correspondence is according to idle adjustment amount output reactive power, makes to be in and coordinate sending out of control model
The grid-connected point voltage of the SVC equipment of electric installation and correspondence thereof reaches the grid-connected point voltage of target；Wherein, coordinate to send out
After the SVC equipment of electric installation and correspondence thereof is according to idle adjustment amount output reactive power, coordinate TRT and
The grid-connected point voltage of the wind energy turbine set that the SVC equipment of its correspondence is corresponding is in properly functioning interval.
Preferably, below equation can be used to calculate the idle adjustment amount Δ Q coordinating AVC substation ii:
ΔVj=S Δ Qi (4)
In formula (4), Δ VjFor being in working as of the SVC equipment j of TRT and the correspondence thereof coordinating control model
Front grid-connected point voltage and the difference (the voltage deviation amount of the most out-of-limit substation) of the grid-connected point voltage of target；It is handed down to coordinate
The idle adjustment amount of the SVC equipment i of TRT and correspondence thereof should be in the Adjustable Capacity coordinating AVC substation i
In weight range；
Constraints is as follows:
1) the idle adjustment amount Δ Q that supervising device issues to the SVC equipment of TRT and correspondence thereofiYing Fa
Variable capacity scope Q of the SVC equipment of electric installation and correspondence thereofavaIn:
0<ΔQi<Qava (5)
2) after the SVC equipment adjustment of TRT and correspondence thereof is idle, TRT and the SVC of correspondence thereof
Equipment voltage Vi newShould be maintained in permission range of operation:
Vi new=Vi old+ΔQiSii (6)
Above content is to combine concrete preferred implementation further description made for the present invention, no
Can assert the present invention be embodied as be confined to these explanations.Common for the technical field of the invention
For technical staff, without departing from the inventive concept of the premise, make some equivalents and substitute or obvious modification,
And performance or purposes are identical, protection scope of the present invention all should be considered as belonging to.
Claims (6)
1. an intelligent powerless compensation system, this intelligent powerless compensation system includes:
TRT, for green energy resource is converted into electric energy, this clean energy resource TRT is multiple；
SVC equipment, provides reactive power, to maintain the steady of grid-connected voltage for the also site at TRT
Fixed, this SVC equipment is multiple, and with described TRT one_to_one corresponding；
Grid-connecting apparatus, for realizing being incorporated into the power networks between TRT and bulk power grid；
And supervising device；
This supervising device includes:
The communication bus that acquisition module, detection module, control module communicate with for described each module；
Described acquisition module, for receiving the voltage instruction that described bulk power grid control centre issues, and from described
Voltage instruction extracts grid-connected point voltage；
Described detection module, is used for receiving current grid-connected point voltage, and by described current grid-connected point voltage with pre-
If interval compares, detect the interval at described current grid-connected point voltage place；
Described control module, is used in the case of described current grid-connected point voltage is in properly functioning interval,
Control the SVC equipment of this TRT and correspondence thereof and enter local control model, and to described TRT and
The SVC equipment of its correspondence issues the grid-connected point voltage of described target, is controlled described grid-connected by reactive power compensation
Point voltage reaches the grid-connected point voltage of described target；
In the case of described current grid-connected point voltage is in misoperation interval, control this exception TRT
And the SVC equipment of correspondence enters and coordinates control model, according to reactive voltage sensitivity and, select to coordinate to send out
The SVC equipment of electric installation and correspondence thereof, controls the SVC equipment output of described coordination TRT and correspondence thereof
Reactive power, coordinates SVC equipment grid-connected of control model exception TRT and correspondence thereof to assist to be in
Point voltage reaches the grid-connected point voltage of described target；And it is in urgent Operational Zone at described current grid-connected point voltage
In the case of between, the SVC equipment controlling this TRT being in urgent traffic coverage and correspondence thereof enters tight
Anxious control model, machine is cut in employing or removal of load mode controls this grid-connected point voltage.
2. the system as claimed in claim 1, it is characterised in that described control module includes: first controls list
Unit, for using below equation to calculate all TRTs for being in the nothing coordinating control model TRT
Merit voltage sensibility coefficient matrix S:S=-(B ")-1V-1, wherein, reactive voltage sensitivity coefficient matrix S
In element SijGrid-connected point voltage for TRT i changes TRT j's and site reactive power changes
Sensitivity coefficient；B is " for the admittance matrix of circuit, matrix's reversibility in described TRT cluster；V=
diag(V1,V2,...,Vn) represent the set end voltage of TRT, total n node；By reactive voltage sensitivity
Sensitivity coefficient S in coefficient matrix SijAccording to being ranked up from big to small；Sensitive above of selected and sorted
Spend the TRT corresponding to coefficient and SVC equipment thereof as described coordination TRT and SVC equipment thereof.
3. system as claimed in claim 2, it is characterised in that described control module includes: second controls list
Unit, for according to being in coordination control model TRT and the current grid-connected point voltage of SVC equipment thereof and institute
State the difference of the grid-connected point voltage of target, described coordination TRT and the nothing of SVC equipment needs offer thereof are provided
Merit adjustment amount；The nothing carrying described idle adjustment amount is issued to described coordination TRT and SVC equipment thereof
Merit is coordinated control instruction, described coordination TRT and SVC equipment thereof and is exported nothing according to described idle adjustment amount
Merit power, makes the grid-connected point voltage being in the TRT and SVC equipment thereof of coordinating control model reach described
The grid-connected point voltage of target；Wherein, described coordination TRT and SVC equipment thereof are according to described idle adjustment amount
After output reactive power, present coordination control model TRT and wind energy turbine set corresponding to SVC equipment thereof
Grid-connected point voltage is in properly functioning interval.
4. system as claimed in claim 3, it is characterised in that described control module includes: the 3rd controls list
Unit, for when being in emergent control pattern, issues Reactive-power control and instructs to being in the generating of emergent control pattern
After device or SVC equipment, detection reaches deliberate action delay time, when controlling to be in emergent control pattern
Cut machine, removal of load, wherein, described deliberate action delay time be more than described in be in sending out of emergent control pattern
Electric installation or the action cycle of SVC equipment, the described action cycle is to be in emergent control pattern at present from described
Send out Reactive-power control and instruct TRT or the time of SVC equipment execution action；Wherein, if also site is electric
Pressure, in the given time always above the peak set, confirms that reactive power compensation planning is used up, and grid-connecting apparatus is cut
Disconnected being incorporated into the power networks with bulk power grid.
5. system as claimed in claim 4, it is characterised in that the main circuit of described SVC equipment is three-phase
The inverter circuit of three brachium pontis, is made up of 6 power electronic devices and DC bus capacitor.
6. system as claimed in claim 5, it is characterised in that described SVC equipment uses voltage space to vow
The modulation system of amount, for the ease of directly controlling in alpha-beta coordinate system, the electricity caused when reducing switching switch
Pressure fluctuation, control SVC output voltage vector is in orthohexagonal inscribed circle, and inscribed circle radius is
udcRepresent the DC capacitor voltage of SVC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610390877.5A CN105932687A (en) | 2016-06-03 | 2016-06-03 | Smart reactive power compensation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610390877.5A CN105932687A (en) | 2016-06-03 | 2016-06-03 | Smart reactive power compensation system |
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| CN103259267A (en) * | 2013-05-17 | 2013-08-21 | 华北电力大学 | Mold splitting type voltage control method for wind power plant cluster |
| CN103715700A (en) * | 2013-12-19 | 2014-04-09 | 国家电网公司 | Reactive power control system and control method applicable to wind farm grid-connection point voltage control |
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