CN105703373B - A kind of power station reactive power distribution system based on voltage sensibility - Google Patents
A kind of power station reactive power distribution system based on voltage sensibility Download PDFInfo
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- CN105703373B CN105703373B CN201610233099.9A CN201610233099A CN105703373B CN 105703373 B CN105703373 B CN 105703373B CN 201610233099 A CN201610233099 A CN 201610233099A CN 105703373 B CN105703373 B CN 105703373B
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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
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses a kind of power station reactive power distribution system based on voltage sensibility, is related to power station Technique of Compensating Capacitance for Reactive field, and the flexible science of distribution method is reasonably high by the reactive power compensation of reduction to normal value, validity；Greatly reduce the degree of unbalancedness of grid entry point voltage, the powerful guarantee safe operation of photo-voltaic power generation station.Scheme is：The real-time output voltage of collection is sent to the first judgment means by harvester, so that the first judgment means are judged that, when Voltage Drop occurs, setting device adjusts out real-time voltage and falls the reactive power total amount for needing to compensate corresponding to value according to reference voltage；For dispensing controller by calculating the sensitivity of each generator unit and reactive power compensation device to grid entry point voltage, the ratio that total sensitivity is accounted for according to respective sensitivity is distribution weight, carries out the distribution of reactive power total amount.Present invention is mainly used for power station reactive power compensation.
Description
Technical field
The present invention relates to power station Technique of Compensating Capacitance for Reactive field, more particularly to a kind of generating based on voltage sensibility
Reactive power of standing distribution system.
Background technology
In recent years, photovoltaic generation industry in China's develops rapidly, and the cut-off whole nation of in September, 2015 Photovoltaic generation installed capacity reaches
37950000 kilowatts, the issue of the end of the year of State Council 2014《Energy development strategy action plan》It is proposed：It is total to the year two thousand twenty, photovoltaic generation
Installed capacity is up to 100,000,000 kilowatts or so, therefore is directed to photovoltaic power generation technology research, and it is current be somebody's turn to do to promote theCourse of PV Industry
The most important thing of art person works.
When running into bad weather（Such as thunderbolt, storm）, Voltage Drop failure can occur for photovoltaic power network.Voltage Drop
(sags/dips) refer to that at a time voltage magnitude deviates normal range of operation suddenly, this will make power network output abnormality, nothing
Work(power reduces.Existing power station reactive power distribution system solves Voltage Drop, compensating power, is on the one hand to pass through hair
Each generator unit in power station itself sends reactive power and compensated, and is on the other hand compensated by external reactive power compensator.
The either each generator unit in power station itself, or reactive power benefit in above-mentioned power station reactive power distribution system
Repay device all simply to compensate according to itself reactive power amount of sending unstable in real time, however, because most of voltages fall
It is unstable and irregular to fall value, and accordingly, the reactive power amount that need to be compensated every time is unstable and irregular, Ruo Gefa
All simply according to itself reactive power unstable in real time when electric unit and each Voltage Drop failure of reactive power compensation device
The amount of sending compensates, and does not ensure that the reactive power compensation of reduction to normal value；Moreover, Voltage Drop failure can cause
A part of or even whole generator unit off-grids, increase grid entry point voltage unbalance factor, have a strong impact on the operation of photo-voltaic power generation station；
A part of or even whole generator unit off-grids, also make the validity of reactive power compensation more be difficult to ensure that.
The content of the invention
A kind of power station reactive power distribution system based on voltage sensibility provided by the invention, harvester will gather
Real-time output voltage be sent to the first judgment means, so that the first judgment means are judged according to reference voltage, work as generation
During Voltage Drop, setting device adjusts out real-time voltage and falls the reactive power total amount for needing to compensate corresponding to value；Distribution control
Device is accounted for always by calculating the sensitivity of each generator unit and reactive power compensation device to grid entry point voltage according to respective sensitivity
The ratio of sensitivity is distribution weight, carries out the distribution of reactive power total amount, the flexible science of distribution method, reasonably by reduction
Reactive power compensation is high to normal value, validity；Greatly reduce the degree of unbalancedness of grid entry point voltage, powerful guarantee photovoltaic hair
The safe operation in power station.
To reach above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
The present invention provides a kind of power station reactive power distribution system based on voltage sensibility, including：Harvester, the
One judgment means, setting device, dispensing controller and reactive power compensator.
The grid entry point in the harvester and power station connects, for gathering real-time output voltage Ua, and will be described real-time
Output voltage Ua is sent to first judgment means.
Wherein, power station is photo-voltaic power generation station, includes a plurality of collection electric line L1, L2, L3 ... Li, the every collection electric wire
J generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij are equipped with road；
The reactance of each generator unit is X11, X12 ... X1j, X21, X22 ... X2j, X31, X32 ... X3j ... Xi1, Xi2 ...
Xij。
Whether first judgment means judge the power station according to the output voltage Ua and reference voltage Ub in real time
There is Voltage Drop：If Ua is not less than Ub, the power station output is normal, does not occur Voltage Drop；If Ua is less than Ub, institute
State power station and Voltage Drop occur, need compensating power, and by computing module calculate real-time voltage fall value Uc, Uc=
Ub-Ua；The value computing module that falls is connected with setting device, and the setting device obtains the real-time voltage and falls value Uc
Adjust out when the real-time voltage falls the reactive power total amount Q that the power station needs compensate when value is Uc.
Dispensing controller includes the first computing unit, the second computing unit, the 3rd computing unit and allocation unit；Described
One computing unit is according to formula：Xhk=, calculate the reactance of each generator unit；Wherein, Xhk is the h bars collection electric wire
The reactance of k-th of generator unit on road, 1≤h≤i, 1≤k≤j；Second computing unit obtains the collection electric line L1,
L2, L3 ... Li voltage U1, U2, U3 ... Ui；According to formula：Shk=Xhk ÷ Uh, calculate described generator unit P11, P12 ...
The reactive power that P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij are sent is to the grid entry point voltage
Sensitivity；Wherein, Shk is k-th of generator unit is sent in the h articles collection electric line reactive power to the grid entry point voltage
Sensitivity, 1≤h≤i, 1≤k≤j；3rd computing unit obtains reactive power compensator and accesses the power station voltage
USVG, according to formula：SSVG=XSVG÷USVG, reactive power that the reactive power compensator is sent is calculated to the grid entry point voltage
Sensitivity；Wherein, SSVGFor sensitivity of the reactive power that the reactive power compensator is sent to the grid entry point voltage, XSVG
For the reactance of the reactive power compensator；The allocation unit is with each generator unit P11, P12 ... the P1j, P21, P22 ...
The reactive power that P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij and the reactive power compensator are sent is to the grid entry point
The ratio that the sensitivity of voltage accounts for total sensitivity is distribution weight, carries out the reactive power total amount Q distribution：First allocation unit
According to formula：Qhk=, with each generator unit P11, P12 ... the P1j, P21, P22 ...
Sensitivity of the reactive power that P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij are sent to the grid entry point voltage accounts for total spirit
The ratio of sensitivity is distribution weight, to each generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j
... Pi1, Pi2 ... Pij carry out reactive power distribution；Second allocation unit is according to formula：QSVG=, with spirit of the reactive power that the reactive power compensator is sent to the grid entry point voltage
The ratio that sensitivity accounts for total sensitivity is distribution weight, and reactive power distribution is carried out to the reactive power compensator.
With reference to above-mentioned, the power station reactive power distribution system based on voltage sensibility, in addition to：Second judges
Device and compensation control device.
Second judgment means obtain the allocation result of first allocation unit and each described generator unit P11, P12 ...
P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij nominal reactive capacity, second allocation unit
Allocation result and the reactive power compensator nominal reactive capacity, judge each described generator unit P11, P12 ... respectively
P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij and the reactive power compensator are allocated idle work(
Whether rate amount exceeds its nominal reactive capacity；
If each generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ...
Pij and the reactive power compensator are allocated reactive power amount and filled without departing from its nominal reactive capacity, then the compensation control
Put each generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1 of control, Pi2 ... Pij and
The reactive power compensator sends reactive power according to allocated reactive power amount and compensated；
If any one or more generator units or the reactive power compensator, which are allocated reactive power amount, exceeds it
Nominal reactive capacity, then it is described compensation control device control any one or more generator units or the reactive-load compensation
Device sends reactive power according to its nominal reactive capacity and compensated.
With reference to above-mentioned, the power station reactive power distribution system based on voltage sensibility, in addition to：Value is owed to calculate
Device and standby reactive power compensator.
Exceed it when any one or more generator units or the reactive power compensator are allocated reactive power amount
Nominal reactive capacity, any one or more generator units or the reactive power compensator are according to its nominal reactive capacity
When sending reactive power, the deficient value calculation apparatus calculates reactive power power back-off and owes value, standby reactive power compensator according to
The reactive power power back-off owes value and sends reactive power.
A kind of power station reactive power distribution system based on voltage sensibility provided by the invention, including：Harvester,
First judgment means, setting device, dispensing controller and reactive power compensator, mended by calculating each generator unit and reactive power
Sensitivity of the device to grid entry point voltage is repaid, the ratio that total sensitivity is accounted for according to respective sensitivity is distribution weight, is carried out idle
The distribution of power total amount, compared to prior art, the flexible science of distribution method of the present invention, reasonably the reactive power of reduction is mended
Normal value is repaid, validity is high；Greatly reduce the degree of unbalancedness of grid entry point voltage, the powerful guarantee safety of photo-voltaic power generation station
Operation.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Accompanying drawing be briefly described.
Fig. 1 is a kind of power station reactive power distribution system configuration group based on voltage sensibility in the embodiment of the present invention 1
Into schematic diagram；
Fig. 2 is a kind of power station reactive power distribution system configuration group based on voltage sensibility in the embodiment of the present invention 2
Into schematic diagram.
In figure, 1. power stations, 11. grid entry points, 2. harvesters, 3. first judgment means, 31. computing modules, 4. adjust
Device, 5. dispensing controllers, 51. first computing units, 52. second computing units, 53. the 3rd computing units, 54. distribution are single
Member, 541. first allocation units, 542. second allocation units, 6. reactive power compensators, 7. second judgment means, 8. compensation controls
Device, 9. owe value calculation apparatus, 10. standby reactive power compensators.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes.Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Embodiment 1
The present invention provides a kind of power station reactive power distribution system based on voltage sensibility, as shown in figure 1, including：
Harvester 2, the first judgment means 3, setting device 4, dispensing controller 5 and reactive power compensator 6.
The harvester 2 is connected with the grid entry point 11 in power station 1, for gathering real-time output voltage Ua, and by described in
Real-time output voltage Ua is sent to first judgment means 3.
Wherein, power station 1 includes a plurality of collection electric line L1, L2, L3 ... Li, and j are equipped with every collection electric line
Generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij；Each generating
The reactance of unit is X11, X12 ... X1j, X21, X22 ... X2j, X31, X32 ... X3j ... Xi1, Xi2 ... Xij.
First judgment means 3 judge that the power station 1 is according to the output voltage Ua and reference voltage Ub in real time
It is no Voltage Drop occur：If Ua is not less than Ub, the power station 1 exports normally, does not occur Voltage Drop；If Ua is less than Ub,
Then there is Voltage Drop in the power station 1, needs compensating power, and calculate real-time voltage by computing module 31 and fall value
Uc, Uc=Ub-Ua；The value computing module 31 that falls is connected with setting device 4, and the setting device 4 obtains the electricity in real time
Pressure is fallen value Uc and adjusted out when the real-time voltage falls the reactive power total amount Q that the needs of power station 1 compensate when value is Uc.
Dispensing controller 5 includes the first computing unit 51, the second computing unit 52, the 3rd computing unit 53 and allocation unit
54；First computing unit 51 is according to formula：Xhk=, calculate the reactance of each generator unit；Wherein, Xhk is
The reactance of k-th of generator unit in the h articles collection electric line, 1≤h≤i, 1≤k≤j；Second computing unit 52 obtains described
Collect electric line L1, L2, L3 ... Li voltage U1, U2, U3 ... Ui；According to formula：Shk=Xhk ÷ Uh, calculate the generator unit
The reactive power that P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij are sent to it is described simultaneously
The sensitivity of the voltage of site 11；Wherein, Shk is k-th of generator unit is sent in the h articles collection electric line reactive power to described
The sensitivity of the voltage of grid entry point 11,1≤h≤i, 1≤k≤j；3rd computing unit 53 obtains reactive power compensator 6 and accessed
The voltage U of power station 1SVG, according to formula：SSVG=XSVG÷USVG, calculate the reactive power that the reactive power compensator 6 is sent
Sensitivity to the voltage of grid entry point 11；Wherein, SSVGFor the reactive power that the reactive power compensator 6 is sent to it is described simultaneously
The sensitivity of the voltage of site 11, XSVGFor the reactance of the reactive power compensator 6；The allocation unit 54 is with each list that generates electricity
First P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij and the reactive power compensator 6
The ratio that sensitivity of the reactive power sent to the voltage of grid entry point 11 accounts for total sensitivity is distribution weight, carries out the nothing
Work(power total amount Q is distributed：First allocation unit 541 is according to formula：Qhk=, with each described
The reactive power that generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij are sent
Sensitivity to the voltage of grid entry point 11 accounts for the ratio of total sensitivity as distribution weight, to each generator unit P11,
P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij carry out reactive power distribution；Second distribution
Unit 542 is according to formula：QSVG=, the idle work(that is sent with the reactive power compensator 6
The ratio that sensitivity of the rate to the voltage of grid entry point 11 accounts for total sensitivity is distribution weight, and the reactive power compensator 6 is entered
Row reactive power is distributed.
A kind of power station reactive power distribution system based on voltage sensibility provided by the invention, including：Harvester
The real-time output voltage of collection is sent to the first judgment means, so that the first judgment means are judged according to reference voltage,
When Voltage Drop occurs, setting device adjusts out real-time voltage and falls the reactive power total amount for needing to compensate corresponding to value；Point
With controller by calculating the sensitivity of each generator unit and reactive power compensation device to grid entry point voltage, according to each sensitive
The ratio that degree accounts for total sensitivity is distribution weight, carries out the distribution of reactive power total amount, compared to prior art, present invention distribution
The flexible science of method is reasonably high by the reactive power compensation of reduction to normal value, validity；Greatly reduce grid entry point voltage
Degree of unbalancedness, the powerful guarantee safe operation of photo-voltaic power generation station.
Embodiment 2
A kind of power station reactive power distribution system based on voltage sensibility of the embodiment of the present invention, as shown in Fig. 2 bag
Include：Harvester 2, the first judgment means 3, setting device 4, dispensing controller 5, reactive power compensator 6, the second judgment means 7,
Control device 8 is compensated, owes value calculation apparatus 9 and standby reactive power compensator 10.
The harvester 2 is connected with the grid entry point 11 in power station 1, for gathering real-time output voltage Ua, and by described in
Real-time output voltage Ua is sent to first judgment means 3.
Wherein, power station 1 is photo-voltaic power generation station, includes a plurality of collection electric line L1, L2, L3 ... Li, the every collection electric wire
J generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij are equipped with road；
The reactance of each generator unit is X11, X12 ... X1j, X21, X22 ... X2j, X31, X32 ... X3j ... Xi1, Xi2 ...
Xij。
First judgment means 3 judge that the power station 1 is according to the output voltage Ua and reference voltage Ub in real time
It is no Voltage Drop occur：If Ua is not less than Ub, the power station 1 exports normally, does not occur Voltage Drop；If Ua is less than Ub,
Then there is Voltage Drop in the power station 1, needs compensating power, and calculate real-time voltage by computing module 31 and fall value
Uc, Uc=Ub-Ua；The value computing module 31 that falls is connected with setting device 4, and the setting device 4 obtains the electricity in real time
Pressure is fallen value Uc and adjusted out when the real-time voltage falls the reactive power total amount Q that the needs of power station 1 compensate when value is Uc.
Dispensing controller 5 includes the first computing unit 51, the second computing unit 52, the 3rd computing unit 53 and allocation unit
54；First computing unit 51 is according to formula：Xhk=, calculate the reactance of each generator unit；Wherein, Xhk is
The reactance of k-th of generator unit in the h articles collection electric line, 1≤h≤i, 1≤k≤j；Second computing unit 52 obtains described
Collect electric line L1, L2, L3 ... Li voltage U1, U2, U3 ... Ui；According to formula：Shk=Xhk ÷ Uh, calculate the generator unit
The reactive power that P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij are sent to it is described simultaneously
The sensitivity of the voltage of site 11；Wherein, Shk is k-th of generator unit is sent in the h articles collection electric line reactive power to described
The sensitivity of the voltage of grid entry point 11,1≤h≤i, 1≤k≤j；3rd computing unit 53 obtains reactive power compensator 6 and accessed
The voltage U of power station 1SVG, according to formula：SSVG=XSVG÷USVG, calculate the reactive power that the reactive power compensator 6 is sent
Sensitivity to the voltage of grid entry point 11；Wherein, SSVG be the reactive power that sends of the reactive power compensator 6 to it is described simultaneously
The sensitivity of the voltage of site 11, XSVGFor the reactance of the reactive power compensator 6；The allocation unit 54 is with each list that generates electricity
First P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij and the reactive power compensator 6
The ratio that sensitivity of the reactive power sent to the voltage of grid entry point 11 accounts for total sensitivity is distribution weight, carries out the nothing
Work(power total amount Q is distributed：First allocation unit 541 is according to formula：Qhk=, with each described
The reactive power that generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij are sent
Sensitivity to the voltage of grid entry point 11 accounts for the ratio of total sensitivity as distribution weight, to each generator unit P11,
P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij carry out reactive power distribution；Second distribution
Unit 54 is according to formula：QSVG=, the reactive power that is sent with the reactive power compensator 6
The ratio that sensitivity to the voltage of grid entry point 11 accounts for total sensitivity is distribution weight, and the reactive power compensator 6 is carried out
Reactive power is distributed.
Second judgment means 7 obtain first allocation unit 541 allocation result and each generator unit P11,
P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij nominal reactive capacity, described second point
The nominal reactive capacity of allocation result and the reactive power compensator 6 with unit 542, judges each generator unit respectively
P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij and the quilt of the reactive power compensator 6
Whether distribution reactive power amount exceeds its nominal reactive capacity.
If each generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ...
Pij and the reactive power compensator 6 are allocated reactive power amount and filled without departing from its nominal reactive capacity, then the compensation control
Put each generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1 of 8 controls, Pi2 ... Pij
Reactive power is sent with the reactive power compensator 6 according to allocated reactive power amount to compensate.
If any one or more generator units or the reactive power compensator 6, which are allocated reactive power amount, exceeds it
Nominal reactive capacity, then it is described to compensate the control any one or more generator units of control device 8 or the idle benefit
Repay device 6 and send reactive power according to its nominal reactive capacity and compensate.
Exceed it when any one or more generator units or the reactive power compensator 6 are allocated reactive power amount
Nominal reactive capacity, any one or more generator units or the reactive power compensator 6 hold according to its nominal reactive
When amount sends reactive power, the deficient value calculation apparatus 9 calculates reactive power power back-off and owes value, standby reactive power compensator 10
Value, which is owed, according to the reactive power power back-off sends reactive power, i.e., the reactive power value that standby reactive power compensator 10 is sent
It is equal that value is owed with reactive power power back-off, to ensure the reactive power compensation that will fall to normal value.
A kind of power station reactive power distribution system based on voltage sensibility provided by the invention, including：Harvester
The real-time output voltage of collection is sent to the first judgment means, so that the first judgment means are judged according to reference voltage,
When Voltage Drop occurs, setting device adjusts out real-time voltage and falls the reactive power total amount for needing to compensate corresponding to value；Point
With controller by calculating the sensitivity of each generator unit and reactive power compensation device to grid entry point voltage, according to each sensitive
The ratio that degree accounts for total sensitivity is distribution weight, carries out the distribution of reactive power total amount, compared to prior art, present invention distribution
The flexible science of method is reasonably high by the reactive power compensation of reduction to normal value, validity；Greatly reduce grid entry point voltage
Degree of unbalancedness, the powerful guarantee safe operation of photo-voltaic power generation station.
Further, the embodiment of the present invention adds the second judgment means, compensates control device, owes value calculation apparatus and standby
With reactive power compensator, when the second judgment means judge what any one or more generator units or reactive power compensator were allocated
When reactive power amount exceeds its nominal reactive capacity, compensation control device controls any one or more generator units or idle
Compensation device sends reactive power according to its specified reactive capability and compensated, and owes value calculation apparatus and calculates reactive power power
Value is owed in compensation, and standby reactive power compensator sends the reactive power amount equal with the deficient value of reactive power power back-off, by what is fallen
Reactive power compensation improves the effective of the present invention to normal value while power station facility and reactive power compensator is protected
Property.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should using the scope of the claims as
It is accurate.
Claims (4)
- A kind of 1. power station reactive power distribution system based on voltage sensibility, it is characterised in that including：Harvester（2）, First judgment means（3）, setting device（4）, dispensing controller（5）And reactive power compensator（6）；The harvester（2）With power station（1）Grid entry point（11）Connection, for gathering real-time output voltage Ua, and by institute State real-time output voltage Ua and be sent to first judgment means（3）；Wherein, the power station（1）Include a plurality of collection electric line L1, L2, L3 ... Li, j generator unit P11, P12 ... P1j, P21, P22 ... P2j is equipped with every collection electric line, P31, P32 ... P3j ... Pi1, Pi2 ... Pij；The reactance of each generator unit is X11, X12 ... X1j, X21, X22 ... X2j, X31, X32 ... X3j ... Xi1, Xi2 ... Xij；First judgment means（3）The power station is judged according to the output voltage Ua and reference voltage Ub in real time（1）It is It is no Voltage Drop occur：If Ua is not less than Ub, the power station（1）Output is normal, does not occur Voltage Drop；If Ua is less than Ub, the then power station（1）There is Voltage Drop, need compensating power, and by computing module（31）Calculate real-time voltage Fall value Uc, Uc=Ub-Ua；The computing module（31）With setting device（4）Connection, the setting device（4）Described in acquisition Real-time voltage falls value Uc and adjusted out when the real-time voltage falls power station when value is Uc（1）Need the idle work(compensated Rate total amount Q；Dispensing controller（5）Include the first computing unit（51）, the second computing unit（52）, the 3rd computing unit（53）And distribution Unit（54）；First computing unit（51）According to formula：Xhk=, calculate the reactance of each generator unit；Its In, Xhk is the reactance of k-th of generator unit in the h articles collection electric line, 1≤h≤i, 1≤k≤j；Second computing unit （52）Obtain voltage U1, U2, U3 ... the Ui of collection electric line L1, L2, L3 ... the Li；According to formula：Shk=Xhk ÷ Uh, calculate Generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... the P3j ... Pi1, Pi2 ... Pij send idle Power is to the grid entry point（11）The sensitivity of voltage；Wherein, Shk is that k-th of generator unit is sent in the h articles collection electric line Reactive power is to the grid entry point（11）The sensitivity of voltage, 1≤h≤i, 1≤k≤j；3rd computing unit（53）Obtain Reactive power compensator（6）Access the power station（1）Voltage USVG, according to formula：SSVG=XSVG÷USVG, calculate the idle benefit Repay device（6）The reactive power sent is to the grid entry point（11）The sensitivity of voltage；Wherein, SSVGFilled for the reactive-load compensation Put（6）The reactive power sent is to the grid entry point（11）The sensitivity of voltage, XSVGFor the reactive power compensator（6）Electricity It is anti-；The allocation unit（54）With each generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij and the reactive power compensator（6）The reactive power sent is to the grid entry point（11）The sensitivity of voltage accounts for The ratio of total sensitivity is distribution weight, carries out the reactive power total amount Q distribution：First allocation unit（541）According to formula： Qhk=, with each generator unit P11, P12 ... P1j, P21, P22 ... the P2j, P31, The reactive power that P32 ... P3j ... Pi1, Pi2 ... Pij are sent is to the grid entry point（11）The sensitivity of voltage accounts for total sensitivity Ratio for distribution weight, to each generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij carry out reactive power distribution；Second allocation unit（542）According to formula：QSVG=, with the reactive power compensator（6）The reactive power sent is to the grid entry point（11） The ratio that the sensitivity of voltage accounts for total sensitivity is distribution weight, to the reactive power compensator（6）Carry out reactive power distribution.
- 2. the power station reactive power distribution system according to claim 1 based on voltage sensibility, it is characterised in that also Including：Second judgment means（7）With compensation control device（8）；Second judgment means（7）Obtain first allocation unit（541）Allocation result and each generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij nominal reactive capacity, described second point With unit（542）Allocation result and the reactive power compensator（6）Nominal reactive capacity, judge respectively it is each it is described generate electricity it is single First P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij and the reactive power compensator （6）It is allocated whether reactive power amount exceeds its described nominal reactive capacity；If each generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij and The reactive power compensator（6）The allocated reactive power amount is without departing from nominal reactive capacity its described, the then compensation Control device（8）Control each generator unit P11, P12 ... P1j, P21, P22 ... P2j, P31, P32 ... P3j ... Pi1, Pi2 ... Pij and the reactive power compensator（6）Reactive power is sent according to the allocated reactive power amount to compensate；If any one or more generator units or the reactive power compensator（6）The allocated reactive power amount exceeds Its described nominal reactive capacity, then the compensation control device（8）Control any one or more generator units or institute State reactive power compensator（6）Reactive power is sent according to nominal reactive capacity its described to compensate.
- 3. the power station reactive power distribution system according to claim 2 based on voltage sensibility, it is characterised in that also Including：Owe value calculation apparatus（9）With standby reactive power compensator（10）；When any one or more generator units or the reactive power compensator（6）The allocated reactive power amount exceeds Its described nominal reactive capacity, any one or more generator units or the reactive power compensator（6）According to its institute When stating nominal reactive capacity and sending reactive power, the deficient value calculation apparatus（9）Calculate reactive power power back-off and owe value, it is standby Reactive power compensator（10）Value, which is owed, according to the reactive power power back-off sends reactive power.
- 4. the power station reactive power distribution system according to claim 1 based on voltage sensibility, it is characterised in that bag Include：The power station（1）For photo-voltaic power generation station.
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