CN103795072B - A kind of ultra high voltage dominant eigenvalues control method considering responsibility degree index - Google Patents
A kind of ultra high voltage dominant eigenvalues control method considering responsibility degree index Download PDFInfo
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Abstract
The invention discloses a kind of ultra high voltage dominant eigenvalues control method considering responsibility degree index, a master control region is set up in AGC system, realize the Region control of interconnected network, set this regional power grid and the qualified threshold value of interconnected network interconnection tie power fluctuation, the responsibility degree index of control area ACE and interconnection tie power fluctuation is calculated according to area control mode, according to responsibility degree index calculate responsibility degree component, according to calculating ACE and interconnection tie power fluctuation responsibility degree index calculate regulating power demand, finally power adjustment requirements is distributed between control unit, for ultra high voltage interconnection tie power fluctuation problem, improve the responsibility performance assessment criteria of regional power grid to ultra high voltage interconnection tie power fluctuation, have a good application prospect.
Description
Technical field
The invention belongs to field of power system control, be specifically related to a kind of ultra high voltage dominant eigenvalues control method considering responsibility degree index.
Background technology
Within 2009, southeast Shanxi-1000 kilovolts, Nanyang-Jingmen UHVAC demonstration project formally puts into operation, opens the New Times of national grid ultra high voltage bulk power grid.For objectively and fairly evaluating the effect that North China and Central China Power Grid control ultra high voltage dominant eigenvalues, control centre of State Grid Corporation of China carries out T standard check to extra-high-voltage alternating current tie--line control.
Along with putting into operation of ultra-high voltage AC transmission engineering, the meritorious disturbance of the generating occurred Anywhere in interconnected network and load all has an impact to interconnection transmission power, thus cause ultra high voltage dominant eigenvalues on the basis of planned value, to produce fluctuation on a large scale, AGC(automatic generation control) control to become very complicated.
Document " control of ultra high voltage interconnected network dominant eigenvalues " (Automation of Electric Systems 2009 the 33rd volume the 15th phase 51 pages) discloses a kind of automatic generation control (AGC) control strategy adapting to ultra high voltage dominant eigenvalues and control, based on the in-situ balancing of each provincial network re-active power, realize each net of interconnected network, economize and adjust controlled area mutual support in case of emergency, the state adapting to China inquired into emphatically in article, net, economize the network regulation under 3 grades of scheduling methods and economize and adjust AGC coordination control strategy, broad sense interconnection is utilized to form closed controlled area, each controlled area can be distinguished preferably to the contribution of interconnected network and responsibility.The control strategy that document proposes is based on the in-situ balancing requiring closed controlled areas at different levels active power, and wherein network regulation unit only participates in the control of ultra high voltage interconnection as emergency use.
At present, network regulation directly adjusts unit to participate in load balancing control to plan tracking mode, when there is relatively large deviation in ultra-short term and electrical network actual load, the adjustment that network regulation directly adjusts unit to do for follow load changes likely adjusts ACE(AreaControlError, district control deviation with province) regulate and contradict.Carrying out T standard check in order to meet control centre of State Grid Corporation of China to extra-high-voltage alternating current tie--line control, eliminating the impact that regional power grid fluctuates on ultra high voltage interconnection, promoting ultra high voltage interconnection responsibility degree performance assessment criteria, is current urgent problem.
Summary of the invention
The object of the invention is to meet control centre of State Grid Corporation of China and T standard check is carried out to extra-high-voltage alternating current tie--line control, eliminate the impact that regional power grid fluctuates on ultra high voltage interconnection, promote ultra high voltage interconnection responsibility degree performance assessment criteria.
In order to achieve the above object, the technical solution adopted in the present invention is:
Consider a ultra high voltage dominant eigenvalues control method for responsibility degree index, it is characterized in that: comprise the following steps,
Step (1), sets up a master control region, realizes the Region control of interconnected network in AGC system, during described master control region modeling, comprises the frequency measuring point of control area, Tie line Power, planned value measuring point;
Step (2), sets this master control regional power grid and the qualified threshold value L of interconnected network ultra high voltage interconnection tie power fluctuation
p, threshold value L
pobtain according to formula (1),
Wherein, n is the number of days of previous year, Δ P
ifor the power deviation of the ultra high voltage interconnection of previous year every day;
Step (3), the control mode arranging this master control region is TBC, the dead band threshold value in setting master control region, and according to TBC control mode, calculates the ACE in this master control region according to formula (2),
ACE＝K*Δf+ΔP(2)
Wherein, K is the frequency deviation coefficient in this master control region; Δ f is the deviation of practical frequency and target frequency; Δ P is ultra high voltage Tie line Power deviation;
Step (4), calculating the responsibility degree index of ultra high voltage interconnection tie power fluctuation corresponding to this master control region, if this master control regional power grid is region A, is region B with it by the regional power grid that ultra high voltage interconnection is interconnected, according to formula (3), the interconnection fluctuation responsibility degree index η of region A
afor:
Wherein, η
afor the responsibility degree index of the relative ultra high voltage interconnection tie power fluctuation of region A; K
bfor the frequency deviation coefficient of adjacent area electrical network B; K
Σfor interconnection region electrical network frequency deviation coefficient sum; ACE
afor the ACE of region A;
Step (5), calculates according to formula (4) and considers that the responsibility degree of ultra high voltage interconnection tie power fluctuation responsibility degree index controls component P
t,
Wherein, P
tfor responsibility degree controls component; η
ifor the responsibility degree index of the relative ultra high voltage interconnection tie power fluctuation of region i;
Step (6), according to interconnection fluctuation responsibility degree index and the responsibility degree control component in this master control region, analyzes the regulating power demand in master control region;
Step (7), by the regulating power in master control region obtained, controls to distribute between unit at each, and each controls sendout that unit commitment obtains and adds that actual the exerting oneself of unit is issued to unit as each control objectives controlling unit.
Aforesaid a kind of ultra high voltage dominant eigenvalues control method considering responsibility degree index, is characterized in that: step (6) to the process regulating power demand to analyze is,
(1) when interconnection fluctuation responsibility degree index is less than threshold value, and when ACE is positioned within the threshold value of dead band, regulating power demand is zero;
(2) when ACE exceeds dead band threshold, or when interconnection fluctuation responsibility degree index exceeds threshold value, regulating power demand is the ACE in master control region;
(3) when ACE exceeds dead band threshold, and when interconnection fluctuation responsibility degree index exceeds threshold value, the regulating power demand in master control region is that the responsibility degree that the ACE in master control region and interconnection fluctuate controls component sum.
The invention has the beneficial effects as follows: the ultra high voltage dominant eigenvalues control method of consideration responsibility degree index of the present invention, by the ACE(AreaControlError to master control region, district control deviation) superpose responsibility degree component, increase regulated quantity on the one hand, accelerate the recovery of ultra high voltage interconnection tie power fluctuation, the adjustment responsibility of another side regional power grid active undertaking ultra high voltage interconnection tie power fluctuation, responsibility degree operation index is made to remain on a good level, the distribution in two dimension interval according to ACE and responsibility degree index, total regulating power demand calculates different control objectives by taking different algorithms, by control objectives is handed down to unit, realize suppressing ultra high voltage interconnection tie power fluctuation, improve the ultra high voltage interconnection tie power fluctuation responsibility degree index of control area, for ultra high voltage interconnection tie power fluctuation problem, improve the responsibility performance assessment criteria of regional power grid to ultra high voltage interconnection tie power fluctuation, have a good application prospect.
Accompanying drawing explanation
Fig. 1 is the flow chart of the ultra high voltage dominant eigenvalues control method of consideration responsibility degree index of the present invention.
Embodiment
Below in conjunction with Figure of description, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
The ultra high voltage dominant eigenvalues control method of consideration responsibility degree index of the present invention, a master control region is set up in AGC system, realize the Region control of interconnected network, set this regional power grid and the qualified threshold value of interconnected network interconnection tie power fluctuation, the responsibility degree index of control area ACE and interconnection tie power fluctuation is calculated according to area control mode, according to responsibility degree index calculate responsibility degree component, according to calculating ACE and interconnection tie power fluctuation responsibility degree index calculate regulating power demand, finally power adjustment requirements is distributed between control unit, specifically comprise the following steps:
Step (1), sets up a master control region, realizes the Region control of interconnected network in AGC system, during described master control region modeling, comprises the frequency measuring point of control area, Tie line Power, planned value measuring point;
Step (2), sets this master control regional power grid and the qualified threshold value L of interconnected network ultra high voltage interconnection tie power fluctuation
p, threshold value L
pobtain according to formula (1),
Wherein, n is the number of days of previous year, Δ P
ifor the power deviation of the ultra high voltage interconnection of previous year every day;
Step (3), the control mode arranging this master control region is TBC(Tie-lineLoadFrequencyBiasControl, order wire frequency Deviation Control), the dead band threshold value in setting master control region, and according to TBC control mode, the ACE(AreaControlError in this master control region is calculated, district control deviation) according to formula (2)
ACE＝K*Δf+ΔP(2)
Wherein, K is the frequency deviation coefficient in this master control region; Δ f is the deviation of practical frequency and target frequency; Δ P is ultra high voltage Tie line Power deviation;
Step (4), calculating the responsibility degree index of ultra high voltage interconnection tie power fluctuation corresponding to this master control region, if this master control regional power grid is region A, is region B with it by the regional power grid that ultra high voltage interconnection is interconnected, according to formula (3), the interconnection fluctuation responsibility degree index η of region A
afor:
Wherein, η
afor the responsibility degree index of the relative ultra high voltage interconnection tie power fluctuation of region A; K
bfor the frequency deviation coefficient of adjacent area electrical network B; K
Σfor interconnection region electrical network frequency deviation coefficient sum; ACE
afor the ACE of region A;
Step (5), calculates according to formula (4) and considers that the responsibility degree of ultra high voltage interconnection tie power fluctuation responsibility degree index controls component P
t,
Wherein, P
tfor responsibility degree controls component; η
ifor the responsibility degree index of the relative ultra high voltage interconnection tie power fluctuation of region i;
Step (6), according to interconnection fluctuation responsibility degree index and the responsibility degree control component in this master control region, analyze the regulating power demand in master control region, analytic process is as follows,
(1) when interconnection fluctuation responsibility degree index is less than threshold value, and when ACE is positioned within the threshold value of dead band, regulating power demand is zero;
(2) when ACE exceeds dead band threshold, or when interconnection fluctuation responsibility degree index exceeds threshold value, regulating power demand is the ACE in master control region;
(3) when ACE exceeds dead band threshold, when and interconnection fluctuates, responsibility degree index exceeds threshold value, the regulating power demand in master control region is that the responsibility degree that the ACE in master control region and interconnection fluctuate controls component sum, by superposing responsibility degree component to control area ACE, increase regulated quantity on the one hand, accelerate the recovery of ultra high voltage interconnection tie power fluctuation, the adjustment responsibility of another side regional power grid active undertaking ultra high voltage interconnection tie power fluctuation, makes responsibility degree operation index remain on a good level;
Step (7), by the regulating power in master control region obtained, controls to distribute between unit at each, and each controls sendout that unit commitment obtains and adds that actual the exerting oneself of unit is issued to unit as each control objectives controlling unit.
More than show and describe general principle of the present invention, principal character and advantage.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (2)
1. consider a ultra high voltage dominant eigenvalues control method for responsibility degree index, it is characterized in that: comprise the following steps,
Step (1), sets up a master control region, realizes the Region control of interconnected network in AGC system, during described master control region modeling, comprises the frequency measuring point of control area, Tie line Power, planned value measuring point;
Step (2), sets this master control regional power grid and the qualified threshold value L of interconnected network ultra high voltage interconnection tie power fluctuation
p, threshold value L
pobtain according to formula (1),
Wherein, n is the number of days of previous year, Δ P
ifor the power deviation of the ultra high voltage interconnection of previous year every day;
Step (3), the control mode arranging this master control region is TBC, the dead band threshold value in setting master control region, and according to TBC control mode, calculates the ACE in this master control region according to formula (2),
ACE＝K*Δf+ΔP(2)
Wherein, K is the frequency deviation coefficient in this master control region; Δ f is the deviation of practical frequency and target frequency; Δ P is ultra high voltage Tie line Power deviation;
Step (4), calculate the responsibility degree index of ultra high voltage interconnection tie power fluctuation corresponding to this master control region, if this master control regional power grid is region A, be region B with it by the regional power grid that ultra high voltage interconnection is interconnected, according to formula (3), the interconnection fluctuation responsibility degree index η of region A
afor:
Wherein, η
afor the responsibility degree index of the relative ultra high voltage interconnection tie power fluctuation of region A; K
bfor the frequency deviation coefficient of adjacent area electrical network B; K
Σfor interconnected regional power grid frequency deviation coefficient sum; ACE
afor the ACE of region A;
Step (5), calculates according to formula (4) and considers that the responsibility degree of ultra high voltage interconnection tie power fluctuation responsibility degree index controls component P
t,
Wherein, P
tfor responsibility degree controls component; η
ifor the responsibility degree index of the relative ultra high voltage interconnection tie power fluctuation of region i;
Step (6), according to interconnection fluctuation responsibility degree index and the responsibility degree control component in this master control region, analyzes the regulating power demand in master control region;
Step (7), by the regulating power in master control region obtained, controls to distribute between unit at each, and each controls sendout that unit commitment obtains and adds that actual the exerting oneself of unit is issued to unit as each control objectives controlling unit.
2. a kind of ultra high voltage dominant eigenvalues control method considering responsibility degree index according to claim 1, is characterized in that: step (6) to the process regulating power demand to analyze is,
(1) when interconnection fluctuation responsibility degree index is less than threshold value, and when ACE is positioned within the threshold value of dead band, regulating power demand is zero;
(2) when ACE exceeds dead band threshold value, or when interconnection fluctuation responsibility degree index exceeds threshold value, regulating power demand is the ACE in master control region;
(3) when ACE exceeds dead band threshold value, and when interconnection fluctuation responsibility degree index exceeds threshold value, the regulating power demand in master control region is that the responsibility degree that the ACE in master control region and interconnection fluctuate controls component sum.
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| CN103259274A (en) * | 2013-04-18 | 2013-08-21 | 华中科技大学 | Multi-area interconnected power network ultra-high voltage tie line power control method and controller |
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Inventor after: Yu Changhai Inventor after: Dai Zemei Inventor after: Zheng Zongqiang Inventor after: Xu Rui Inventor after: Zhang Xiaobai Inventor after: Xu Chunlei Inventor after: Qian Yumei Inventor after: Zhou Ting Inventor after: Zhang Qibing Inventor before: Yu Changhai Inventor before: Dai Zemei Inventor before: Xu Rui Inventor before: Zhang Xiaobai Inventor before: Xu Chunlei Inventor before: Qian Yumei Inventor before: Zhou Ting Inventor before: Zhang Qibing |
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