CN109361221A - A kind of method and system calculating Minimum Area Reactive Power Reserve nargin - Google Patents
A kind of method and system calculating Minimum Area Reactive Power Reserve nargin Download PDFInfo
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- CN109361221A CN109361221A CN201811132815.XA CN201811132815A CN109361221A CN 109361221 A CN109361221 A CN 109361221A CN 201811132815 A CN201811132815 A CN 201811132815A CN 109361221 A CN109361221 A CN 109361221A
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- reactive power
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- nargin
- power reserve
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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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 present invention provides a kind of method and system for calculating Minimum Area Reactive Power Reserve nargin, belongs to technical field of power systems.The method of the present invention includes: to determine that load point i meets load bus Reactive Power Margin K in i load point in region by adjusting modeqIt is required that；If the reactive power of the corresponding each reactive source Critical operating point of load point i is Qmaxn, the corresponding idle power output of adjustment mode afterload point i is initial reactive power Q0n；The Reactive Power Reserve for determining the corresponding each reactive source of load point i is QRn, determine that the corresponding Reactive Power Reserve nargin of the corresponding each reactive source of load point i is Ki q Rn；The corresponding minimum Reactive Power Reserve nargin K of calculated load point ii q；According to seeking the corresponding minimum Reactive Power Reserve nargin K of load point ii qDetermine the Minimum Area Reactive Power Reserve nargin K in regionqmin；The present invention is conducive to the voltage power-less weak link that operation of power networks dispatcher understands regional power grid, and reasonable arrangement System Reactive Power guarantees that system voltage is stablized.
Description
Technical field
The present invention relates to technical field of power systems, and it is abundant to relate more specifically to a kind of calculating Minimum Area Reactive Power Reserve
The method and system of degree.
Background technique
With the advance to perfect order that China's extra-high voltage grid is built, until 2015, extra-high voltage and the conveying of transregional, transnational power grid are held
Amount is 2.61 hundred million kilowatts, and extra-high voltage AC and DC assumes responsibility for 80% or more power transmission, and extra-high voltage grid ability to transmit electricity is compared with superelevation
Pressure alternating current-direct current greatly improve, to communication channel bear power flow transfer ability more stringent requirements are proposed." three China " receiving end power grid
The 32% of regional total load, especially East China will be accounted for by AC and DC transmission path partially by electricity by electric ratio outside area
It is higher than regular meeting.Spy/super high voltage direct current electricity transmission system concentrates drop point " three China " receiving end power grid, the direct current system of drop point East China
Sum reaches 9 times, forms direct current group.For the receiving end AC system of multi-infeed DC, the locking of high power DC route or exchange
Line fault may due to receiving end AC system dynamic reactive off-capacity and cause voltage support insufficient, cause network voltage
It continues to decline, finally results in collapse of voltage.
And the reactive power of system is to transmit at a distance, the local reactive source farther away region that can not adjust the distance is formed
Effective reactive voltage support, therefore definition region Reactive Power Reserve can be carried out by Network Partition for Voltage Control.The reactive power reserve of system
So far without explicitly definition and calculation formula, mainly due to the location of different dynamic reactive power supply point difference, hair
Out idle different to effect that system voltage is stable, so reactive power reserve is not to hold to these power supply point Reactive Power Reserves
The simple superposition of amount.In terms of dynamic reactive equipment application, dynamic reactive stand-by arrangement is always a necessity, but is not yet obtained
The problem of sufficiently answering.It is spare to the dynamic reactive of generator, although there is generator to encourage by force, the regulations such as under-excitation ability requirement can
According to, but also lack very much from the research for the running optimizatin angle for considering voltage stability, other dynamic reactive equipment such as SVC, SVG
Stand-by arrangement be even more ununified foundation and standard, this causes to run uneconomical or dynamic response capability in practice and reduce
The problems such as.
Summary of the invention
In view of the above deficiencies, the present invention proposes a kind of method for calculating Minimum Area Reactive Power Reserve nargin, the method for the present invention
Include:
By adjusting mode, determine that load point i meets load bus Reactive Power Margin K in i load point in regionqIt is required that
I≤the n, i and n are natural number；
If the reactive power of the corresponding each reactive source Critical operating point of load point i is Qmaxn, load point i after adjustment mode
Corresponding idle power output is initial reactive power Q0n；
The Reactive Power Reserve for determining the corresponding each reactive source of load point i is QRn, determine that the corresponding each reactive source of load point i is corresponding
Reactive Power Reserve nargin be Ki q Rn；
According to the Reactive Power Reserve nargin K of the corresponding reactive source of load point ii qRnThe corresponding minimum of calculated load point i is idle standby
With nargin Ki q, calculation formula is as follows:
Ki q=min { Ki qR1,Ki qR2......}
According to the corresponding minimum Reactive Power Reserve nargin K of load point ii q, determine the Minimum Area Reactive Power Reserve nargin in region
KqminCalculation formula is as follows:
Optionally, load bus reactive power nargin KqCalculation formula is as follows:
Q0For reactive power value, the Q of each reactive source initial launch pointmaxFor the reactive power of each reactive source Critical operating point
Value.
Optionally, the Reactive Power Reserve Q of each reactive sourceRn, calculation formula is as follows:
QRn=Qmaxn-Q0n。
Optionally, the Reactive Power Reserve nargin K of the corresponding reactive source of load point ii qRnCalculation formula is as follows:
The present invention also provides a kind of system for calculating Minimum Area Reactive Power Reserve nargin, include: in the system
Adjustment mode module, by adjusting mode, determine in region in i load point load point i meet load bus without
Function nargin KqIt is required that i≤the n, i and n are natural number；
Parameter determination module, if the reactive power of the corresponding each reactive source Critical operating point of load point i is Qmaxn, adjustment side
The corresponding idle power output of load point i after formula is initial reactive power Q0n；
Computing module determines that the Reactive Power Reserve of the corresponding each reactive source of load point i is QRn, determine that load point i is corresponding each
The corresponding Reactive Power Reserve nargin of reactive source is Ki q Rn；
Minimum Reactive Power Reserve nargin determining module, according to the Reactive Power Reserve nargin K of the corresponding reactive source of load point ii qRnMeter
Calculate the corresponding minimum Reactive Power Reserve nargin K of load point ii q, calculation formula is as follows:
Ki q=min { Ki qR1,Ki qR2......}
Minimum Area Reactive Power Reserve determining module, according to the corresponding minimum Reactive Power Reserve nargin K of load point ii q, determine region
Minimum Area Reactive Power Reserve nargin KqminCalculation formula is as follows:
Optionally, load bus reactive power nargin KqCalculation formula is as follows:
Q0For reactive power value, the Q of each reactive source initial launch pointmaxFor the reactive power of each reactive source Critical operating point
Value.
Optionally, the Reactive Power Reserve Q of each reactive sourceRn, calculation formula is as follows:
QRn=Qmaxn-Q0n。
Optionally, the Reactive Power Reserve nargin K of the corresponding reactive source of load point ii qRnCalculation formula is as follows:
The present invention is conducive to the voltage power-less weak link that operation of power networks dispatcher understands regional power grid, reasonable arrangement system
It unites idle, guarantees that system voltage is stablized.
Detailed description of the invention
Fig. 1 is a kind of method flow diagram for calculating Minimum Area Reactive Power Reserve nargin of the present invention；
Fig. 2 is a kind of system construction drawing for calculating Minimum Area Reactive Power Reserve nargin of the present invention.
Specific embodiment
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes
Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be at large and fully disclose
The present invention, and the scope of the present invention is sufficiently conveyed to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon note.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
The present invention provides a kind of method for calculating the idle standby nargin of Minimum Area using three machines, nine node system as embodiment,
As shown in Figure 1, detailed process includes:
Each reactive source of three machines, nine node system is provided first, and reactive source specifically includes that generator and shunt capacitor, corresponding
Idle maximum output be respectively Qmaxn as shown in table 1:
Table 1
| Reactive source | Generator 1 | Generator 2 | Generator 3 | Capacitor CA | Capacitor CB | Capacitor CC |
| Qmaxn(Mvar) | 999.0 | 999.0 | 999.0 | 50.0 | 30.0 | 50.0 |
By adjusting mode, node system bus parallel reactive equipment and generator voltage are adjusted, determines in region and bears for i
I-th of load point meets load bus Reactive Power Margin K in lotus pointqIt is required that it is natural number that wherein i, which is greater than or equal to n, i and n,, make
It obtains load point i and meets the requirement of load bus Reactive Power Margin as defined in " guiding rules of power system safety and stability " 8%, load bus is idle
Power margin KqCalculation formula is as follows:
Q0For reactive power value, the Q of each reactive source initial launch pointmaxFor the reactive power of each reactive source Critical operating point
Value；
When i is 2, calculated result is as shown in table 2 below:
Table 2
| Bus | 2 | A | B | C |
| Reactive power nargin/% | 8.0 | 20.8 | 32.8 | 17.8 |
If the reactive power of the corresponding each reactive source Critical operating point of load point i is Qmaxn, load point i after adjustment mode
Corresponding idle power output is initial reactive power Q0n；
The Reactive Power Reserve Q of each reactive sourceRn, calculation formula is as follows:
QRn=Qmaxn-Q0n。
The Reactive Power Reserve nargin K of the corresponding reactive source of load point ii qRnCalculation formula is as follows:
The Reactive Power Reserve for determining the corresponding each reactive source of load point 2 is QRn, determine the nothing of the corresponding each reactive source of load point 2
The spare nargin of function is K2 q Rn；
Calculated result is as shown in table 3:
Table 3
| Reactive source | Generator 1 | Generator 2 | Generator 3 | Capacitor CA | Capacitor CB | Capacitor CC |
| QRn(Mvar) | 701.6 | 276.0 | 701.6 | 30.0 | 20.0 | 30.0 |
| K2 qRn/% | 70.2 | 27.6 | 70.2 | 60.0 | 66.7 | 60.0 |
According to the Reactive Power Reserve nargin K of the corresponding reactive source of load point ii qRnThe corresponding minimum of calculated load point i is idle standby
With nargin Ki q, calculation formula is as follows:
Ki q=min { Ki qR1,Ki qR2......}
Calculated result K2 q=27.6%, according to the above method, calculates separately load point A, load point B and load point C is corresponding
Minimum Reactive Power Reserve nargin, calculated result is as shown in table 4, table 5 and table 6:
Table 4
Table 5
Table 6
Obtaining the corresponding minimum Reactive Power Reserve nargin of load point A, B, C from above-mentioned calculated result is respectively KA q=22.1%,
KB q=19.0%, KC q=22.3%.
According to the corresponding minimum Reactive Power Reserve nargin K of load point ii q, determine Minimum Area Reactive Power Reserve nargin calculation formula
It is as follows:
The Minimum Area Reactive Power Reserve nargin that region is asked according to above-mentioned formula is Kqmin=min { K2 q, KA q, KB q, KC q}=
Min { 27.6%, 22.1%, 19.0%, 22.3% }=19.0%.
The present invention also provides a kind of systems for calculating Minimum Area Reactive Power Reserve nargin for power saving apparatus, as shown in Fig. 2,
System 200 includes:
Minimum Area Reactive Power Reserve nargin determining module 204, according to the Reactive Power Reserve nargin of the corresponding reactive source of load point i
Ki qRnThe corresponding minimum Reactive Power Reserve nargin K of calculated load point ii q, calculation formula is as follows:
Ki q=min { Ki qR1,Ki qR2......}
Minimum Area Reactive Power Reserve determining module 205, according to the corresponding minimum Reactive Power Reserve nargin K of load point ii q, determine
Minimum Area Reactive Power Reserve nargin K in regionqminCalculation formula is as follows:
Adjustment mode module 201 determines that load point i meets load bus in i load point in region by adjusting mode
Reactive Power Margin KqIt is required that i≤the n, i and n are natural number；
Wherein, load bus reactive power nargin KqCalculation formula is as follows:
Q0For reactive power value, the Q of each reactive source initial launch pointmaxFor the reactive power of each reactive source Critical operating point
Value.
Parameter determination module 202, if the reactive power of the corresponding each reactive source Critical operating point of load point i is Qmaxn, adjust
The corresponding idle power output of load point i after perfect square formula is initial reactive power Q0n；
Computing module 203 determines that the Reactive Power Reserve of the corresponding each reactive source of load point i is QRn, determine that load point i is corresponding
The corresponding Reactive Power Reserve nargin of each reactive source is Ki q Rn；
Wherein, the Reactive Power Reserve Q of each reactive sourceRn, calculation formula is as follows:
QRn=Qmaxn-Q0n。
Wherein, the Reactive Power Reserve nargin K of the corresponding reactive source of load point ii qRnCalculation formula is as follows:
Minimum Reactive Power Reserve nargin determining module 204, according to the Reactive Power Reserve nargin K of the corresponding reactive source of load point ii qRn
The corresponding minimum Reactive Power Reserve nargin K of calculated load point ii q, calculation formula is as follows:
Ki q=min { Ki qR1,Ki qR2......}
Minimum Area Reactive Power Reserve nargin determining module 205, according to the corresponding minimum Reactive Power Reserve nargin K of load point ii q,
Determine the Minimum Area Reactive Power Reserve nargin K in regionqminCalculation formula is as follows:
The present invention is conducive to the voltage power-less weak link that operation of power networks dispatcher understands regional power grid, by adjusting side
Formula, reasonable arrangement System Reactive Power guarantee that system voltage is stablized.
The present invention has important directive significance to the arrangement of system operation mode.
Claims (8)
1. a kind of method for calculating Minimum Area Reactive Power Reserve nargin, which comprises
By adjusting mode, determine that load point i meets load bus Reactive Power Margin K in i load point in regionqIt is required that the i
≤ n, i and n are natural number；
If the reactive power of the corresponding each reactive source Critical operating point of load point i is Qmaxn, the load point i after adjustment mode is corresponding
Idle power output be initial reactive power Q0n；
The Reactive Power Reserve for determining the corresponding each reactive source of load point i is QRn, determine the corresponding nothing of the corresponding each reactive source of load point i
The spare nargin K of functioni q Rn；
According to the Reactive Power Reserve nargin K of the corresponding reactive source of load point ii qRnThe corresponding minimum Reactive Power Reserve nargin of calculated load point i
Ki q, calculation formula is as follows:
Ki q=min { Ki qR1,Ki qR2......}
According to the corresponding minimum Reactive Power Reserve nargin K of load point ii q, determine the Minimum Area Reactive Power Reserve nargin K in regionqmin
Calculation formula is as follows:
2. according to the method described in claim 1, the load bus reactive power nargin KqCalculation formula is as follows:
Q0For reactive power value, the Q of each reactive source initial launch pointmaxFor the reactive power value of each reactive source Critical operating point.
3. according to the method described in claim 1, the Reactive Power Reserve Q of each reactive sourceRn, calculation formula is as follows:
QRn=Qmaxn-Q0n。
4. according to the method described in claim 1, the Reactive Power Reserve nargin K of the corresponding reactive source of load point ii qRnIt calculates
Formula is as follows:
5. a kind of system for calculating Minimum Area Reactive Power Reserve nargin, includes: in the system
Adjustment mode module determines in region that it is idle abundant to meet load bus by load point i in i load point by adjusting mode
Spend KqIt is required that i≤the n, i and n are natural number；
Parameter determination module, if the reactive power of the corresponding each reactive source Critical operating point of load point i is Qmaxn, after adjustment mode
Load point i it is corresponding it is idle power output be initial reactive power Q0n；
Computing module determines that the Reactive Power Reserve of the corresponding each reactive source of load point i is QRn, determine that load point i is corresponding each idle
The corresponding Reactive Power Reserve nargin K in sourcei q Rn；
Minimum Reactive Power Reserve nargin determining module, according to the Reactive Power Reserve nargin K of the corresponding reactive source of load point ii qRnCalculated load
The corresponding minimum Reactive Power Reserve nargin K of point ii q, calculation formula is as follows:
Ki q=min { Ki qR1,Ki qR2......}
Minimum Area Reactive Power Reserve determining module, according to the corresponding minimum Reactive Power Reserve nargin K of load point ii q, determine region most
Zonule Reactive Power Reserve nargin KqminCalculation formula is as follows:
6. system according to claim 1, the load bus reactive power nargin KqCalculation formula is as follows:
Q0For reactive power value, the Q of each reactive source initial launch pointmaxFor the reactive power value of each reactive source Critical operating point.
7. system according to claim 1, the Reactive Power Reserve Q of each reactive sourceRn, calculation formula is as follows:
QRn=Qmaxn-Q0n。
8. system according to claim 1, the Reactive Power Reserve nargin K of the corresponding reactive source of load point ii qRnIt calculates
Formula is as follows:
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109962477A (en) * | 2019-02-28 | 2019-07-02 | 中国电力科学研究院有限公司 | For indicating the method and system of bus and branch-based voltage stability index |
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