CN103427444B - Control method for reducing wind power grid-connected scheduling plan error - Google Patents
Control method for reducing wind power grid-connected scheduling plan error Download PDFInfo
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Abstract
A control method for reducing a wind power grid-connected scheduling plan error comprises the steps of firstly analyzing the wind power outlet characteristics in a wide-area time scale and the influence of the wind power outlet characteristics on a power grid scheduling plan, wherein the influence comprises the influence of the wind power output randomness in the wide-area time scale on the power grid scheduling plan, the wind power output fluctuation characteristic in the wide-area time scale on the power grid scheduling plan, and the influence of the wind power intermittent and anti-peak shaving characteristics on the power grid scheduling plan; and then establishing a multi-dimensional scale system of the wind power grid-connected power system scheduling plans on the basis of analyzing the wind power outlet characteristics in the wide-area time scale and the influence of the wind power outlet characteristics on the power grid scheduling plan; establishing mutually coordinated scheduling plans in the multi-dimensional scale system, adding the optimization schemes of other scheduling plans in the scheduling plans in different scales, and utilizing the scheduling plans of different scales to optimize mutually, thereby controlling the reducing the error of the wind power grid-connected actual output and the plan output.
Description
Technical field
The present invention relates to a kind of control method reducing wind-electricity integration operation plan error.
Background technology
Along with the development of wind generating technology and the large-scale grid connection of wind-powered electricity generation, the uncontrollability of wind and unpredictability cause wind-electricity integration operation plan and actual conditions bigger error, enforceability is low, therefore for ensureing that the operation of power grid security economic stability, externally reliable power supply, all kinds of electrical production work are carried out in order, the power system dispatching plan under wind-electricity integration is widely studied.
The formulation of the operation plan under wind-electricity integration is based on accurate as far as possible power prediction." wind energy kingdom " Denmark is the country comparatively early carrying out wind power forecasting system exploitation in the world, priority develops Prediktor wind power forecasting system by Riso National Laboratory of Denmark, Technical University Of Denmark develops WPPT wind power prediction instrument, the two function integrated, defines wind power forecasting system Zephry of new generation subsequently.Meanwhile, the other countries in Europe also develop wind power forecasting system.As the Oldenburg university of Germany and German solar energy research develop wind power forecasting system Previento and senior wind power prediction instrument AWPPT respectively, sipre ó lico, LocalPred-RegioPred and the More-Care system of Madrid, ESP Carlos three generations university and the exploitation of Spain's regenerative resource center, and the Honeymoon system etc. of Ireland exploitation.The European Union ANEMOS project participated in by 7 national 23 scientific research institutions in addition, combines physical method and statistical method, develops for land and marine wind power forecasting system.Except European countries, the U.S. also develops wind power forecasting system, and its AWSTrueWind company develops eWind wind power prediction system.
Based on accurate as far as possible wind power prediction, China conducts in-depth research for the scheduling strategy of self wind-powered electricity generation situation wind-electricity integration system and algorithm, propose multiple scheduling method, such as document 1(Sun Tao, Wang Wei wins, Dai Huizhu etc. the voltage fluctuation and flicker [J] that wind power generation causes. electric power network technique .2003,27 (12): 62-66) by analyzing the inherent characteristics of wind-powered electricity generation the precision of prediction characteristic that improves step by step of yardstick and active power dispatch in time in, active power dispatch pattern and key technology thereof that Multiple Time Scales coordinates is proposed; Document 2(Zhao Jing ripple, Lei Jinyong, Gande is strong. and battery energy storage device is suppressing the application [J] in low-frequency oscillation of electric power system. electric power network technique, 2010,32 (6): 93-99,108) have studied the Economic Analysis Method containing wind power system power generation dispatching, proposing based on abandoning 2 kinds of power generation dispatching patterns that air quantity is minimum and energy consumption is minimum; Document 3(Yuan Tie river, Chao Qin etc. large-scale wind power interconnected electric power system kinetic cleaning economic optimization scheduling modeling research [J]. Proceedings of the CSEE, 2010,30 (31): 7-13) consider the safe and stable operation constraint of wind power output characteristic and wind-electricity integration system, have studied the preparation method of 5 kinds of different wind-powered electricity generation operation plans.
The achievement in research of comprehensive countries in the world wind-electricity integration power system dispatching plan, especially China's wind-electricity integration power system dispatching plan, it has following feature:
1) time scale of the wind power forecast relied on during dispatching of power netwoks plan, should tend to choose smaller value, because little time scale means higher wind power output forecast precision, and Different time scales is not isolated, but form the system of organic linking based on operation plan;
2) the wind power output fluctuation more in large scale such as more than 15 minutes and even hour level is relatively large, can by increasing the wind power predicted value based on shifting to an earlier date in corresponding time scale, the adjustment of the machine unit scheduling plan on the yardstick coordinated with AGC control plan overcomes;
3) wind power output rely on nature the wind comes from (uncontrollable), interval and anti-peak-shaving capability, affect formulation and the execution of the startup-shutdown plan of conventional energy resource unit in electric power system.During the low wind of the high wind coupling long period of long period, part of generating units hot starting, hot start may be needed; During the high wind of the low wind coupling long period of long period, part of generating units heat may be needed to stop.And the start-stop of traditional fossil energy unit needs the constraint by time and economy.In addition anti-peak-shaving capability requires that system provides extra for subsequent use, interruptible load or wind energy turbine set to abandon wind operational plan etc., also needs the start/stop machine of unit in the extreme circumstances.
Numerous researchs of current wind-electricity integration power system dispatching plan, the science of economic dispatch plan under wind-electricity integration system is formulated and provides sufficient theoretical foundation and reference, but shorter mention utilizes operation plan to exert oneself and actual error of exerting oneself from smooth wind power plan.
Summary of the invention
Technical problem to be solved by this invention overcome existing operation plan because of wind power output fluctuation, rely on nature the wind comes from (uncontrollable) interval and the characteristic such as anti-peak regulation, random (being difficult to accurately predicting) and cause operation plan and actual conditions error larger, wind-electricity integration system needs to provide a large amount of additionally for subsequent use and dispatcher frequently to participate in the shortcomings such as power-balance adjustment, there is provided a kind of utilize operation plan to control wind-electricity integration is actual exerts oneself and the error of planning to exert oneself, make it the method reduced.
The technical scheme that the present invention solve the technical problem employing is:
1, first wind-powered electricity generation power producing characteristics and the impact on dispatching of power netwoks plan thereof in wide area time scale is analyzed, comprise wind power output in wide area time scale randomness and on wind power output wave characteristic and the impact on dispatching of power netwoks plan in the impact of dispatching of power netwoks plan, wide area time scale, and wind power output interval and the special impact on dispatching of power netwoks plan of anti-peak regulation.
(1) randomness of wind power output and the impact on dispatching of power netwoks plan in wide area time scale: wind power output randomness make it exert oneself prediction error is comparatively large, error time domain distribution observability is poor, correlation is there is in error magnitude with forecast time scale, time scale is larger, and the error of wind power forecast is larger.
Therefore, the time scale of the wind power forecast that dispatching of power netwoks plan relies on, should tend to choose smaller value, because little time scale means higher wind power output forecast precision, and Different time scales is not isolated, but form the system of organic linking based on operation plan.
(2) wind power output wave characteristic and the impact on dispatching of power netwoks plan in wide area time scale: under prior art conditions, by natural conditions restriction, wide area distributes wind-resources.Wind energy conversion system in wind energy turbine set and wind energy turbine set all presents wide area spatial-temporal distribution characteristic, add the effect of inertia of wind turbine blade, the level and minute level wave time yardstick second that (AGC) work is controlled: in 10s-15min in automatic generation amount, wide area distribution wind power output has from smoothing capability, and the wind-powered electricity generation fluctuation of wide area distribution is little.In 0-15 minute this time scale, the fluctuation of this regional power grid output of wind electric field is very little, and wind power forecast precision in this time scale is higher, control constraints automatic generation amount being controlled to (AGC) is not dominant, but wind-electricity integration electric power system needs, when formulating Real-Time Scheduling plan, consider may affecting of wind-powered electricity generation and suitably increase automatic generation amount control (AGC) adjustable nargin.
The wind power output fluctuation more in large scale such as more than 15 minutes and even hour level is relatively large; can by increasing the wind power predicted value based on shifting to an earlier date in corresponding time scale; the adjustment of the machine unit scheduling plan controlled on yardstick that (AGC) control plan coordinates with automatic generation amount overcomes; and the means such as wind need not be abandoned regulate, in order to avoid the realization of the regulation goals such as influential system economy, environmental protection by providing a large amount of additionally for subsequent use, interruptible load or wind energy turbine set.
(3) wind power output interval and the special impact on dispatching of power netwoks plan of anti-peak regulation: wind power output relies on that nature be the wind comes from (uncontrollable), interval and anti-peak-shaving capability, affects formulation and the execution of the startup-shutdown plan of conventional energy resource unit in electric power system.During the low wind of the high wind coupling long period of long period, part of generating units hot starting, hot start may be needed; During the high wind of the low wind coupling long period of long period, part of generating units heat may be needed to stop.And the start-stop of traditional fossil energy unit needs the constraint by time and economy.In addition anti-peak-shaving capability requires that wind-electricity integration electric power system provides extra for subsequent use, interruptible load or wind energy turbine set to abandon wind operational plan etc., also needs the start/stop machine of unit in the extreme circumstances.If the wind power predicted value based on being not less than unit maximum heat start-stop time in advance can be increased, the operation plan of yardstick is coordinated mutually with startup and shutdown of units time window, due to wind power forecast precision can be improved further again, then can tackle the impact of wind power output interval and anti-peak regulation preferably.
2, in analysis wide area time scale, on wind-powered electricity generation power producing characteristics and the basis on the impact of dispatching of power netwoks plan, the multidimensional scale system of wind-electricity integration power system dispatching plan is set up.Described multidimensional scale system comprises time scale, operation plan yardstick and error band scale yardstick.Time scale comprise level second, 5-15min level, 30-60 minute level and day level; Operation plan yardstick comprises automatic generation amount and controls (AGC) operation plan, Real-Time Scheduling plan, rolling scheduling plan and operation plan a few days ago; Error band scale comprises 25% error zone, (25%+ δ) error zone and (25%+ δ ± ∞) error zone.Due in wind power forecast, the wind-electricity integration operation plan that the little wind power prediction error band that small time scales is corresponding is corresponding obtains on the wind-electricity integration operation plan basis that the larger wind power prediction error band that the time scale that upper level is larger is corresponding is corresponding, and wind power prediction error corresponding under Different time scales is in the different error bands on wind power output prediction error band scale yardstick, the corresponding little wind power prediction error band of little time scale, the error of corresponding wind-electricity integration operation plan is also just little.Have inner link between operation plan: operation plan is the basis of formulating rolling scheduling plan a few days ago, rolling scheduling plan is the basis of formulating Real-Time Scheduling plan simultaneously, and Real-Time Scheduling plan is the basis of formulating the plan of automatic generation amount Control and Schedule.And the wind power forecast data of the day level of operation plan dependence a few days ago obtains, day level wind power prediction error its error comparatively large is positioned at (25%+ δ ± ∞) error zone; The wind power forecast data that rolling planning relies on 30-60 minute level obtains, and the wind power prediction error of 30-60 minute level is positioned at (25%+ δ) error zone; The wind power forecast data that Real-Time Scheduling plan relies on 5-15min level obtains, and the wind power prediction error of 5-15min level is positioned at 25% error zone; The plan of automatic generation amount Control and Schedule, based on Real-Time Scheduling plan, eliminates the error of wind power forecast in 25% error zone automatically according to the control strategy of " filling a vacancy flat remaining ";
When actual wind power is greater than the wind power predicted value of 5-15min level, wind turbine generator or the control plan of conventional energy resource generating set automatic generation amount Control and Schedule perform " more than flat " control strategy, namely reduce generating set to exert oneself, the generating set reduced goes out the difference that force value is the wind power predicted value of actual wind power and 5-15min level; When wind power is less than the wind power predicted value of 5-15min level, the control plan of conventional energy resource generating set automatic generation amount Control and Schedule performs " filling a vacancy " control strategy, namely increase generating set to exert oneself, the generating set of increase goes out the difference that force value is the wind power predicted value of actual wind power and 5-15min level;
When after acquisition day level wind power predicted value, with day stage load predicted value be combined, according to cleaning, economical, the principle optimized, formulate day level operation plan, when power system operation, real-time wind power predicted value and network load value can be obtained, the grid-connected operation plan of multidimensional scale system regulating wind power described in utilization, by real-time wind power predicted value and network load value, by described dispatching of power netwoks multi-dimentional scale system, comprise time scale, the control strategy of operation plan yardstick and error band scale yardstick, corresponding modify is carried out to day level operation plan, constantly utilize real time data to continue to correct to operation plan simultaneously, reach progressively to the correction of dispatching of power netwoks plan, make operation plan more accurate, reduce the error of wind-electricity integration operation plan.
25% described error zone is the region that wind power output prediction error absolute value is not more than 25%;
Described (25%+ δ) error zone is the region that wind power output prediction error absolute value is greater than that 25% width is δ;
Described (25%+ δ+∞) error zone is the region that wind power output prediction error absolute value is greater than 25%+ δ.
A kind of control method reducing wind-electricity integration operation plan error proposed by the invention, based on wind power predicted value, consider wide area time scale wind power output characteristic to the impact of dispatching of power netwoks plan and the error of different scale to the constraint of operation plan, the operation plan mutually coordinated under being based upon hyperspace scale system, utilize the coupling of operation plan, reduce due to power producing characteristics such as prediction error, fluctuation, interval and anti-peak regulations on the impact that electrical network produces, thus reduce wind-electricity integration operation plan error.
Accompanying drawing explanation
The wind power output prediction error band scale yardstick schematic diagram that Fig. 1 stabilizes based on error layering;
Fig. 2 dispatching of power netwoks multi-dimentional scale system schematic diagram;
Fig. 3 reduces wind-electricity integration operation plan control errors figure.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
The step of the inventive method is:
1, first wind-powered electricity generation power producing characteristics and the impact on dispatching of power netwoks plan thereof in wide area time scale is analyzed, comprise wind power output in wide area time scale randomness and on wind power output wave characteristic and the impact on dispatching of power netwoks plan in the impact of dispatching of power netwoks plan, wide area time scale, and wind power output interval and the special impact on dispatching of power netwoks plan of anti-peak regulation.
2, in analysis wide area time scale, on wind-powered electricity generation power producing characteristics and the basis on the impact of dispatching of power netwoks plan, the multidimensional scale system of wind-electricity integration power system dispatching plan is set up.Described multidimensional scale system comprises time scale, operation plan yardstick and error band scale yardstick.The operation plan mutually coordinated is set up in multidimensional scale system, the operation plan of different scale is utilized mutually to optimize, namely in the operation plan under different scale, all add the prioritization scheme to other operation plans, make the operation plan under the upper level long period yardstick after optimization can reduce the error of the operation plan of next stage short period yardstick, operation plan under upper level long period yardstick affects the error of the operation plan of next stage short period yardstick, by utilizing real-time wind power value, the operation plan under upper level long period yardstick is optimized through row, operation plan error after optimization is less, the operation plan error under next stage short period yardstick can be made to reduce.Reach and control that wind-electricity integration is actual exerts oneself and the error of planning to exert oneself, make it the object reduced.
The method of the grid-connected operation plan of multidimensional scale system regulating wind power utilizing the present invention to set up is described below in conjunction with accompanying drawing.
Fig. 1 is the wind power output prediction error band scale yardstick schematic diagram stabilized based on error layering, issue by National Energy Board and to set up based on " wind farm power prediction forecast management Tentative Measures ", under this error band scale yardstick, wind power output prediction error divides layer-regulating method, namely in different error scale layers, reduce the method for error, its method is as follows:
Wind-powered electricity generation in Fig. 1 regulatory region for subsequent use is the part that wind power output prediction error absolute value is not more than 25%, i.e. 25% error zone, its error component stabilizes mainly through calling that normal duty that wind-electricity integration electric power system provides is for subsequent use and wind-powered electricity generation is for subsequent use realizes, wind-powered electricity generation one side for subsequent use provides necessary supplementing, be subject to the restriction of system resource and wind-powered electricity generation operating cost on the other hand, what wind-powered electricity generation was for subsequent use provides and can not suppress for target with error universe.As long as consider that actual error exists, just all can universe or part component be stabilized in local area, thus reach with less cost, and significantly do not increase for subsequent use under, farthest stabilize prediction error to scheduling and the impact of operation of power networks, in conjunction with " wind farm power prediction forecast management Tentative Measures " (rear abbreviation " way ") regulation to wind-powered electricity generation forecast precision that on June 9th, 2011, National Energy Board issued, for better realize specify with " way " be connected, the present invention defines 25% error zone of wind power output prediction error band in error band scale yardstick.
Energy storage regulatory region in Fig. 1 is the region that wind power output prediction error absolute value is greater than that 25% width is δ, i.e. (25%+ δ) error zone, " handle up " energy-storage system of ability of flexible power that has that its error component is provided by wind energy turbine set at local area suppresses.Energy storage system capacity has an optimal value, and constraint is common determines for the wind power prediction error limit value that it can be accepted by the performance of wind power forecast system, installed capacity of wind-driven power, energy-storage system performance and electrical network etc.The capacity of energy-storage system determines the size of δ, both roughly proportional relations.
Wind-electricity integration electric power system in Fig. 1 and wind energy turbine set regulatory region are the regions that wind power output prediction error absolute value is greater than 25%+ δ, i.e. (25%+ δ+∞) error zone, when additionally not increasing system resource burden, such as extra for subsequent use, wind-electricity integration electric power system arranges part interruptible load or wind energy turbine set to abandon the prediction error component that negative direction and positive direction are stabilized in wind plan respectively.The major constraints that wind energy turbine set abandons wind be its prediction error excessive caused by, electrical network should be considered as and rationally abandon wind.
Fig. 2 is the dispatching of power netwoks multi-dimentional scale system that the present invention proposes, comprise time scale, operation plan yardstick and error band scale yardstick, it adopts based on accurate as far as possible wind power forecast, by the coupling between wide domain wind-powered interconnected electric power system operation plan, reach the control object reducing wind-electricity integration operation plan error step by step, its control strategy comprises:
1) operation plan a few days ago: the wind power forecast data that operation plan relies on day level a few days ago obtains, day level wind power prediction error its error comparatively large is positioned at (25%+ δ ± ∞) error zone, according to wind power predicted value a few days ago based on clean and economic multiple target formulation dispatching of power netwoks plan;
2) (25%+ δ+∞) error zone and the 1 little rolling scheduling plan up to 4 hours intersections, the present invention is defined as+∞ plan: the formulation of+∞ plan is based on operation plan a few days ago, by wind power real-time prediction value, emphasis correction or from level and smooth a few days ago in the works for the startup and shutdown of units plan of (25%+ δ+∞) error zone prediction error, prediction error is excessive a few days ago to prevent wind-powered electricity generation, exert oneself with anti-peak regulation to the large disturbances of electrical network in gap under harsh conditions, from+∞ the error band of smooth wind power power forecast, ensure the realization as far as possible of wind-powered electricity generation dispatch curve a few days ago,
3) the rolling scheduling plan of (25%+ δ) error zone and 30 minutes to 1 hour intersecting areas, the present invention is defined as+δ plan: the wind power prediction error of 30-60 minute level is positioned at (25%+ δ) error zone, the formulation emphasis of+δ plan combines operation plan and (25%+ δ+∞) error zone operation plan a few days ago, for the difference between wind power expansion real-time prediction value and real-time prediction value, in conjunction with the virtual condition that each unit is current, revise operation plan a few days ago, prevent prediction error excessive, cause conventional power unit to be exerted oneself and significantly regulate (such as oil spout in low year runs), and from+∞ the error band of smooth wind power power prediction error zone and (25%+ δ) error band, and reduce the adjusting range of wind power prediction error band 25% district's unit output plan as much as possible,
4) the Real-Time Scheduling plan of 25%th district and 15 minutes to 30 minutes intersecting areas: the wind power prediction error that Real-Time Scheduling plan relies on is positioned at 25% error zone, the formulation of Real-Time Scheduling plan is in conjunction with each unit current operating conditions and+δ plan, emphasis reply wind power output ultra-short term forecast and current difference of exerting oneself online and load go out fluctuation, formulate the control plan of each power supply, regulate nargin for system AGC unit is reserved, reduce the error of wind power forecast (25%+ δ) error band and+∞ error band as far as possible;
5) automatic generation amount controls (AGC) operation plan: based on Real-Time Scheduling plan, automatically eliminates the error of wind power forecast in 25% error zone according to the control strategy of " filling a vacancy flat remaining ".When actual wind power is greater than the wind power predicted value of 5-15min level, wind turbine generator or conventional energy resource generating set automatic generation amount control the plan of (AGC) scheduling controlling and perform " flat remaining " control strategy, namely reduce generating set to exert oneself, the generating set of reduction goes out the difference that force value is the wind power predicted value of actual wind power and 5-15min level; When wind power is less than the wind power predicted value of 5-15min level, the plan of conventional energy resource generating set AGC scheduling controlling performs " filling a vacancy " control strategy, namely increase generating set to exert oneself, the generating set of increase goes out the difference that force value is the wind power predicted value of actual wind power and 5-15min level.
Fig. 3 is the control chart reducing wind-electricity integration operation plan error, as shown in Figure 3, and P
1for day level wind power predicted value, according to wind power predicted value a few days ago, based on clean and economic multiple target formulation electrical network operation plan a few days ago; And then utilize the electrical network operation plan a few days ago formulated, contrasted by predicted value and wind power real-time prediction value, consider network load value P simultaneously
2, pass through+∞ plan, to electrical network a few days ago operation plan once revise, make dispatch curve a few days ago accurate; Further, utilize once corrected electrical network operation plan a few days ago, contrast wind power real-time prediction value, considers network load value P
2, pass through+δ and plan second-order correction electrical network operation plan a few days ago, prevent prediction error excessive, cause conventional power unit to exert oneself the problems such as significantly adjustments and the adjusting range of minimizing wind power prediction error band 25% district's unit output plan as much as possible; Finally, by the Real-Time Scheduling plan in conjunction with each unit current operating conditions, for system machine unit automatic generation amount controls (AGC) reserved adjustment nargin, and realize the accurate of dispatching of power netwoks by automatic generation amount control (AGC) operation plan, economical, reliably perform.
When after acquisition day level wind power predicted value, with day stage load predicted value is combined, according to principle that is clean, economic, that optimize, formulation day level operation plan.When power system operation, real-time wind power predicted value and network load value can be obtained, utilize the grid-connected operation plan of multidimensional scale system regulating wind power of the present invention.Its concrete grammar is by real-time wind power predicted value and network load value, according to the control strategy of the dispatching of power netwoks multi-dimentional scale system shown in Fig. 2, corresponding modify is carried out to day level operation plan, constantly utilize real time data to continue to correct to operation plan simultaneously, reach progressively to the correction of dispatching of power netwoks plan, make operation plan more accurate, reduce the error of wind-electricity integration operation plan.
Compared with existing wind-electricity integration operation plan; the present invention is based on wind-electricity integration multidimensional scale system; consider the time; predicated error; wind feature is on the impact of operation plan; by the coupling between wide domain wind-powered interconnected electric power system operation plan; operation plan is progressive; reach the control object reducing wind-electricity integration operation plan error step by step; improve the degree of performed of operation plan, make power system dispatching plan cleaning, economy, optimize and take into account system environments protection, economical operation, wind-powered electricity generation characteristic and system function optimization.
Claims (3)
1. one kind reduces the control method of wind-electricity integration operation plan error, it is characterized in that described control method is: first analyze wind-powered electricity generation power producing characteristics and the impact on dispatching of power netwoks plan thereof in wide area time scale, comprise wind power output in wide area time scale randomness and on wind power output wave characteristic and the impact on dispatching of power netwoks plan in the impact of dispatching of power netwoks plan, wide area time scale, and wind power output interval and the special impact on dispatching of power netwoks plan of anti-peak regulation; Then in analysis wide area time scale, on wind-powered electricity generation power producing characteristics and the basis to dispatching of power netwoks project impact, the multidimensional scale system of wind-electricity integration power system dispatching plan is set up; In multidimensional scale system, set up the operation plan mutually coordinated, in the operation plan under different scale, add the prioritization scheme of other operation plans;
In described wide area time scale, wind-powered electricity generation power producing characteristics and the impact on dispatching of power netwoks plan thereof are: wind power prediction error corresponding under Different time scales is in the different error bands on wind power output prediction error band scale yardstick, the corresponding little wind power prediction error band of little time scale, the error of corresponding wind-electricity integration operation plan is also just little;
On operation plan yardstick, there is coupled relation between the scheduling plan of exerting oneself of different scale: the wind-electricity integration operation plan that the little wind power prediction error band that small time scales is corresponding is corresponding obtains on the wind-electricity integration operation plan basis that the larger wind power prediction error band that the time scale that upper level is larger is corresponding is corresponding;
Relation between operation plan on operation plan yardstick is: operation plan is the basis of formulating rolling scheduling plan a few days ago, rolling scheduling plan is the basis of formulating Real-Time Scheduling plan, and Real-Time Scheduling plan is the basis of formulating the plan of automatic generation amount Control and Schedule; The wind power forecast data that operation plan relies on day level a few days ago obtains, day level wind power prediction error comparatively large, its error is positioned at (25%+ δ ± ∞) error zone; The wind power forecast data that rolling planning relies on 30-60 minute level obtains, and the wind power prediction error of 30-60 minute level is positioned at (25%+ δ) error zone; The wind power forecast data that Real-Time Scheduling plan relies on 5-15min level obtains, and the wind power prediction error of 5-15min level is positioned at 25% error zone; The plan of automatic generation amount Control and Schedule, based on Real-Time Scheduling plan, eliminates the error of wind power forecast in 25% error zone automatically according to the control strategy of " filling a vacancy flat remaining ";
When actual wind power is greater than the wind power predicted value of 5-15min level, wind turbine generator or the control plan of conventional energy resource generating set automatic generation amount Control and Schedule perform " more than flat " control strategy, namely reduce generating set to exert oneself, the generating set reduced goes out the difference that force value is the wind power predicted value of actual wind power and 5-15min level; When wind power is less than the wind power predicted value of 5-15min level, the control plan of conventional energy resource generating set automatic generation amount Control and Schedule performs " filling a vacancy " control strategy, namely increase generating set to exert oneself, the generating set of increase goes out the difference that force value is the wind power predicted value of actual wind power and 5-15min level;
When after acquisition day level wind power predicted value, with day stage load predicted value be combined, according to cleaning, economical, the principle optimized, formulate day level operation plan, when power system operation, real-time wind power predicted value and network load value can be obtained, the grid-connected operation plan of multidimensional scale system regulating wind power described in utilization, by real-time wind power predicted value and network load value, by described dispatching of power netwoks multi-dimentional scale system, comprise time scale, the control strategy of operation plan yardstick and error band scale yardstick, corresponding modify is carried out to day level operation plan, constantly utilize real time data to continue to correct to operation plan simultaneously, reach progressively to the correction of dispatching of power netwoks plan, make operation plan more accurate, reduce the error of wind-electricity integration operation plan.
2., according to the control method of reduction wind-electricity integration operation plan error according to claim 1, it is characterized in that described multidimensional scale system comprises time scale, operation plan yardstick and error band scale yardstick; Described time scale is divided into level second, 5-15min level, 30-60 minute level and day level 4 yardsticks; Described operation plan yardstick comprises the plan of automatic generation amount Control and Schedule, Real-Time Scheduling plan, rolling scheduling plan and operation plan a few days ago; Described error band scale comprises 25% error zone, (25%+ δ) error zone and (25%+ δ ± ∞) error zone.
3. according to the control method of reduction wind-electricity integration operation plan error according to claim 2, it is characterized in that in described error band scale: 25% described error zone is the region that wind power output prediction error absolute value is not more than 25%; Described (25%+ δ) error zone is the region that wind power output prediction error absolute value is greater than that 25% width is δ; Described (25%+ δ+∞) error zone is the region that wind power output prediction error absolute value is greater than 25%+ δ.
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