CN103427444A - 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 that reduces wind-electricity integration operation plan error.
Background technology
Grid-connected on a large scale along with the development of wind generating technology and 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 guaranteeing that the power grid security economic stability is moved, 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 that to take as far as possible accurate power prediction be basis." wind energy kingdom " Denmark is the country that early carries out the wind power forecasting system exploitation in the world, successively by Denmark Riso National Laboratory developed the Prediktor wind power forecasting system, Technical University Of Denmark has developed WPPT wind power forecasting tool, integrated the two function, formed wind power forecasting system Zephry of new generation subsequently.Simultaneously, the other countries in Europe also develop wind power forecasting system.As German Oldenburg university and wind power forecasting system Previento that German solar energy research has been developed respectively and senior wind power forecasting tool AWPPT, 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 of Ireland exploitation etc.The ANEMOS of the European Union project participated in by 23 scientific research institutions of 7 countries in addition, combine physical method and statistical method, developed for land and marine wind power forecasting system.Except European countries, the U.S. also develops wind power forecasting system, and its AWSTrueWind company has developed eWind wind power prediction system.
Based on accurate as far as possible wind power prediction, China conducts in-depth research for scheduling strategy and the algorithm of self wind-powered electricity generation situation wind-electricity integration system, multiple scheduling method has been proposed, document 1(Sun Tao for example, Wang Wei's victory, Dai Huizhu etc. the voltage fluctuation that wind power generation causes and flickering [J]. electric power network technique .2003,27 (12): 62-66), by analyzing the inherent characteristics of the wind-powered electricity generation precision of prediction characteristic that yardstick improves step by step in time and meritorious scheduling, proposed meritorious scheduling method and key technology thereof that Multiple Time Scales is coordinated; Document 2(Zhao Jing ripple, Lei Jinyong, Gande is strong. the application [J] of battery energy storage device in suppressing low-frequency oscillation of electric power system. and electric power network technique, 2010,32 (6): 93-99,108) study the Economic Analysis Method containing the wind power system power generation dispatching, proposed 2 kinds of power generation dispatching patterns based on abandoning air quantity minimum and energy consumption 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-powered electricity generation power producing characteristics and wind-electricity integration system, 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:
The time scale of the wind power forecast 1) relied on during the dispatching of power netwoks plan, should tend to choose smaller value, because little time scale means the higher wind-powered electricity generation forecast precision of exerting oneself, and the different time yardstick does not isolate, and be based on the system that operation plan forms organic linking;
2) more than 15 minutes so that hour level etc. more the wind-powered electricity generation on large scale to go out fluctuation relatively large, can be by increasing the wind power predicted value based on shifting to an earlier date on corresponding time scale, the adjustment of the machine unit scheduling plan on the yardstick of coordinating with the AGC control plan overcomes;
3) wind-powered electricity generation is exerted oneself and is relied on nature and the wind comes from (uncontrollable), intermittently and anti-peak regulation characteristic, 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, may need the part of generating units hot starting, hot start; During the high wind of the low wind coupling long period of long period, may need part of generating units heat to stop.And the start-stop of traditional fossil energy unit need to be subject to the constraint of time and economy.Anti-peak regulation characteristic requirements system provides extra standby, interruptible load or wind energy turbine set to abandon wind operational plan etc. in addition, also needs the start/stop machine of unit in severe situation.
Numerous researchs of wind-electricity integration power system dispatching plan at present, the science of economic dispatch plan under the wind-electricity integration system is formulated sufficient theoretical foundation and reference are provided, but shorter mention utilizes operation plan to exert oneself and actual error of exerting oneself from level and smooth wind-powered electricity generation plan.
Summary of the invention
Technical problem to be solved by this invention overcome existing operation plan because of wind-powered electricity generation go out fluctuation, rely on that nature be the wind comes from (uncontrollable) intermittently and anti-peak regulation, random characteristics such as (being difficult to accurately predicting) cause operation plan and the actual conditions error larger, the wind-electricity integration system need to provide a large amount of additionally standby and dispatchers frequently to participate in the shortcomings such as power-balance adjusting, provide a kind of operation plan that utilizes to control that wind-electricity integration is actual exerts oneself and the error of planning to exert oneself, the method that makes it to reduce.
The technical scheme that the present invention solve the technical problem employing is:
1, at first analyze wind-powered electricity generation power producing characteristics on the wide area time scale and on the impact of dispatching of power netwoks plan, comprise randomness that on the wide area time scale, wind-powered electricity generation is exerted oneself and on exert oneself wave characteristic and on the impact of dispatching of power netwoks plan of wind-powered electricity generation on the impact of dispatching of power netwoks plan, wide area time scale, and wind-powered electricity generation is exerted oneself intermittently and anti-peak regulation spy on the impact of dispatching of power netwoks plan.
(1) randomness that on the wide area time scale, wind-powered electricity generation is exerted oneself and on the impact of dispatching of power netwoks plan: wind-powered electricity generation exert oneself randomness it is exerted oneself prediction error is large, error time domain distribution observability is poor, there is correlation in the error amplitude with the forecast time scale, time scale is larger, and the error of wind power forecast is larger.
Therefore, the time scale of wind power that the dispatching of power netwoks plan relies on forecast, should tend to choose smaller value, because little time scale means the higher wind-powered electricity generation forecast precision of exerting oneself, and the different time yardstick does not isolate, and be based on the system that operation plan forms organic linking.
(2) exert oneself wave characteristic and on the impact of dispatching of power netwoks plan of wind-powered electricity generation on the wide area time scale: under the prior art condition, wind-resources is subject to the natural conditions restriction and wide area distributes.Wind energy conversion system in wind energy turbine set and wind energy turbine set all presents the wide area spatial-temporal distribution characteristic, add the effect of inertia of wind turbine blade, control in the automatic generation amount second level and minute level fluctuation time scale that (AGC) works: in 10s-15min, wide area distribution wind-powered electricity generation is exerted oneself and is had from level and smooth ability, and the wind-powered electricity generation fluctuation that wide area distributes is little.On 0-15 minute this time scale, this regional power grid output of wind electric field fluctuation is very little, and the wind power forecast precision on this time scale is higher, the control constraint of the automatic generation amount being controlled to (AGC) is not dominant, but the wind-electricity integration electric power system need to be when formulating the Real-Time Scheduling plan, consider may affecting of wind-powered electricity generation and suitably increase the automatic generation amount and control (AGC) adjustable nargin.
More than 15 minutes so hour level etc. more the wind-powered electricity generation on large scale to go out fluctuation relatively large; can be by increasing the wind power predicted value based on shifting to an earlier date on corresponding time scale; the adjustment of controlling the machine unit scheduling plan on the yardstick that (AGC) control plan coordinates with the automatic generation amount overcomes; and needn't regulate by providing a large amount of additionally standby, interruptible loads or wind energy turbine set to abandon the means such as wind, in order to avoid affect the realization of the regulation goals such as systematic economy, environmental protection.
(3) wind-powered electricity generation exert oneself intermittently and anti-peak regulation spy on the impact of dispatching of power netwoks plan: wind-powered electricity generation is exerted oneself and is relied on nature and the wind comes from (uncontrollable), intermittently and anti-peak regulation characteristic, 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, may need the part of generating units hot starting, hot start; During the high wind of the low wind coupling long period of long period, may need part of generating units heat to stop.And the start-stop of traditional fossil energy unit need to be subject to the constraint of time and economy.The electric power system of anti-peak regulation characteristic requirements wind-electricity integration provides extra standby, interruptible load or wind energy turbine set to abandon wind operational plan etc. in addition, also needs the start/stop machine of unit in severe situation.If can increase the wind power predicted value based on being not less than in advance unit maximum heat start-stop time, coordinate mutually the operation plan of yardstick with the startup and shutdown of units time window, owing to can further improving the wind power forecast precision again, can tackle preferably wind-powered electricity generation and exert oneself intermittently and the impact of anti-peak regulation.
2, analyzing on wind-powered electricity generation power producing characteristics on the wide area time scale and the basis on the impact of dispatching of power netwoks plan thereof, set up the multidimensional scale system of wind-electricity integration power system dispatching plan.Described multidimensional scale system comprises time scale, operation plan yardstick and error band scale yardstick.Time scale comprises a second level, 5-15min level, 30-60 minute level and day level; The operation plan yardstick comprises that the automatic generation amount controls (AGC) operation plan, Real-Time Scheduling plan, rolling scheduling plan and operation plan a few days ago; The error band scale comprises 25% error zone, (25%+ δ) error zone and (25%+ δ ± ∞) error zone.Due in the wind power forecast, wind-electricity integration operation plan corresponding to little wind power prediction error band that between hour, yardstick is corresponding is to obtain on the wind-electricity integration operation plan basis that larger wind power prediction error band corresponding to the time scale larger at upper level is corresponding, and under the different time yardstick, corresponding wind power prediction error is in the different error bands that wind-powered electricity generation exerts oneself on 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 the rolling scheduling plan a few days ago simultaneously, and the rolling scheduling plan is the basis of formulating the Real-Time Scheduling plan, and the 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 day level of operation plan dependence a few days ago obtains, day level wind power prediction error its error greatly 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 the Real-Time Scheduling plan relies on the 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 be take the Real-Time Scheduling plan as basis, according to the control strategy of " filling a vacancy flat remaining ", automatically eliminates the error of wind power forecast in 25% error zone;
When actual wind power is greater than the wind power predicted value of 5-15min level, " flat remaining " control strategy is carried out in wind turbine generator or the control plan of conventional energy resource generating set automatic generation amount Control and Schedule, reduce generating set and exert oneself, the generating set value of exerting oneself reduced is the difference of 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, " filling a vacancy " control strategy is carried out in the control plan of conventional energy resource generating set automatic generation amount Control and Schedule, increase generating set and exert oneself, the difference of the wind power predicted value that generating set value of exerting oneself of increase is actual wind power and 5-15min level;
After obtaining day level wind power predicted value, with day the stage load predicted value be combined, according to cleaning, economical, the principle of optimizing, formulate a day level operation plan, when power system operation, can access real-time wind power predicted value and network load value, utilize the grid-connected operation plan of described multidimensional scale system regulating wind power, 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, to day the level operation plan carry out corresponding modify, constantly utilize real time data to be continued to correct to operation plan simultaneously, reach progressively the correction to the dispatching of power netwoks plan, make operation plan more accurate, reduce the error of wind-electricity integration operation plan.
Described 25% error zone is that the wind-powered electricity generation prediction error absolute value of exerting oneself is not more than 25% zone;
Described (25%+ δ) error zone is that the wind-powered electricity generation prediction error absolute value of exerting oneself is greater than the zone that 25% width is δ;
Described (25%+ δ+∞) error zone is that the wind-powered electricity generation prediction error absolute value of exerting oneself is greater than the zone of 25%+ δ.
A kind of control method that reduces wind-electricity integration operation plan error proposed by the invention, based on the wind power predicted value, consider the constraint to operation plan on the error of the impact of dispatching of power netwoks plan and different scale of wide area time scale wind-powered electricity generation power producing characteristics, be based upon the operation plan of mutually coordinating under hyperspace scale system, utilize the coupling of operation plan, the impact that reduction produces electrical network due to the power producing characteristics such as prediction error, fluctuation, intermittence and anti-peak regulation, thus wind-electricity integration operation plan error reduced.
The accompanying drawing explanation
Fig. 1 wind-powered electricity generation that layering is stabilized based on error prediction error band scale yardstick schematic diagram of exerting oneself;
Fig. 2 dispatching of power netwoks multi-dimentional scale system schematic diagram;
Fig. 3 reduces wind-electricity integration operation plan error control chart.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
The step of the inventive method is:
1, at first analyze wind-powered electricity generation power producing characteristics on the wide area time scale and on the impact of dispatching of power netwoks plan, comprise randomness that on the wide area time scale, wind-powered electricity generation is exerted oneself and on exert oneself wave characteristic and on the impact of dispatching of power netwoks plan of wind-powered electricity generation on the impact of dispatching of power netwoks plan, wide area time scale, and wind-powered electricity generation is exerted oneself intermittently and anti-peak regulation spy on the impact of dispatching of power netwoks plan.
2, analyzing on wind-powered electricity generation power producing characteristics on the wide area time scale and the basis on the impact of dispatching of power netwoks plan thereof, set up the multidimensional scale system of wind-electricity integration power system dispatching plan.Described multidimensional scale system comprises time scale, operation plan yardstick and error band scale yardstick.Set up the operation plan of mutually coordinating in multidimensional scale system, utilize the operation plan of different scale mutually to optimize, all add the prioritization scheme to other operation plans in the operation plan under different scale, operation plan under upper level long period yardstick after making to optimize 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, can make the operation plan error under next stage short period yardstick reduce.Reach and control that wind-electricity integration is actual exerts oneself and the error of planning to exert oneself, the purpose that makes it to reduce.
The method of the grid-connected operation plan of multidimensional scale system regulating wind power that utilizes the present invention to set up below in conjunction with the accompanying drawing explanation.
Fig. 1 is layering is stabilized based on error the wind-powered electricity generation prediction error band scale yardstick schematic diagram of exerting oneself, take National Energy Board, to issue " wind farm power prediction forecast management Tentative Measures " be Foundation, under this error band scale yardstick, the wind-powered electricity generation prediction error of exerting oneself divides layer-regulating method, in different error scale layers, reduce the method for error, its method is as follows:
The standby regulatory region of wind-powered electricity generation in Fig. 1 is that the wind-powered electricity generation prediction error absolute value of exerting oneself is not more than 25% part, i.e. 25% error zone, its error component stabilizes mainly that normal duty that the wind-electricity integration electric power system provides is standby and wind-powered electricity generation is standby realizes by calling, the standby one side of wind-powered electricity generation provides necessary supplementing, be subject on the other hand the restriction of system resource and wind-powered electricity generation operating cost, wind-powered electricity generation is standby provides that can not to take that the error universe suppresses be target.Consider actual error as long as exist, just all can universe or the part component in local area, stabilized, thereby reached with less cost, and significantly do not increase standby under, farthest stabilize the impact of prediction error on scheduling and operation of power networks, regulation in conjunction with " wind farm power prediction forecast management Tentative Measures " (rear be called for short " way ") that on June 9th, 2011, National Energy Board issued to the wind-powered electricity generation forecast precision, for realizing better and being connected that " way " stipulated, the present invention has defined exert oneself 25% error zone of prediction error band of wind-powered electricity generation in error band scale yardstick.
Energy storage regulatory region in Fig. 1 is that the wind-powered electricity generation prediction error absolute value of exerting oneself is greater than the zone that 25% width is δ, i.e. (25%+ δ) error zone, and its error component provides by wind energy turbine set at local area has " handle up " energy-storage system of ability of flexible power and suppresses.Energy storage system capacity has an optimal value, and the constraint such as the wind power prediction error limit value that it can be accepted by performance, installed capacity of wind-driven power, energy-storage system performance and the electrical network of wind power forecast system is common to be determined.The capacity of energy-storage system has determined the size of δ, and both are proportional relation roughly.
Wind-electricity integration electric power system in Fig. 1 and wind energy turbine set regulatory region are that the wind-powered electricity generation prediction error absolute value of exerting oneself is greater than the zone of 25%+ δ, i.e. (25%+ δ+∞) error zone, in the situation that additionally do not increase the system resource burden, such as extra standby, the 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 respectively in the wind plan.The major constraints that wind energy turbine set is abandoned wind be its prediction error excessive due to, should be considered as electrical network 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 purpose that reduces step by step wind-electricity integration operation plan error, its control strategy comprises:
1) operation plan a few days ago: operation plan relies on day wind power forecast data of level and obtains a few days ago, day large its error of level wind power prediction error 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) the rolling scheduling plan of (25%+ δ+∞) error zone and 1 hour to 4 hours intersection, be defined as+∞ of the present invention plan: it is basis that operation plan is a few days ago take in the formulation of+∞ plan, by wind power real-time prediction value, emphasis correction or from smoothly a few days ago in the works for the startup and shutdown of units plan of (25%+ δ+∞) error zone prediction error, prevent wind-powered electricity generation a few days ago the gap in excessive, the severe situation of prediction error exert oneself and anti-peak regulation to the large disturbance of electrical network, from level and smooth wind power, forecast+the ∞ error band, guarantee the wind-powered electricity generation realization as far as possible of dispatch curve a few days ago;
3) the rolling scheduling plan of (25%+ δ) error zone and 30 minutes to 1 hour intersecting areas, be defined as+δ of the present invention plan: the wind power prediction error of 30-60 minute level is positioned at (25%+ δ) error zone, the formulation emphasis combination of+δ plan is 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, the current virtual condition in conjunction with each unit, revise operation plan a few days ago, prevent that prediction error is excessive, cause conventional unit output significantly to regulate (such as oil spout operation in low year), and certainly level and smooth wind power prediction error zone+∞ error band and (25%+ δ) error band, and the adjusting range that reduces as much as possible the 25%th district unit output plan of wind power prediction error band,
4) the Real-Time Scheduling plan of 25%th district and 15 minutes to 30 minutes intersecting areas: the wind power prediction error that the Real-Time Scheduling plan relies on is positioned at 25% error zone, the formulation of Real-Time Scheduling plan in conjunction with the current running status of each unit and+δ plan, emphasis reply wind-powered electricity generation is exerted oneself, and ultra-short term forecasts and current difference of exerting oneself online and the fluctuation of loading out, formulate the control plan of each power supply, regulate nargin for system AGC unit is reserved, reduce as far as possible the error of reach+∞ error band of wind power forecast (25%+ δ) error band;
5) the automatic generation amount is controlled (AGC) operation plan: take the Real-Time Scheduling plan as basis, according to the control strategy of " filling a vacancy flat remaining ", automatically eliminate the error of wind power forecast in 25% error zone.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 are controlled the plan of (AGC) scheduling controlling and are carried out " flat remaining " control strategy, reduce generating set and exert oneself, the generating set value of exerting oneself reduced is the difference of 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, " filling a vacancy " control strategy is carried out in the plan of conventional energy resource generating set AGC scheduling controlling, increase generating set and exert oneself, the difference of the wind power predicted value that generating set value of exerting oneself of increase is actual wind power and 5-15min level.
Fig. 3 is the control chart that reduces 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 formulate operation plan a few days ago, and by predicted value and wind power real-time prediction value, contrast, consider network load value P simultaneously
2, by+∞ plan, to electrical network a few days ago operation plan once revise, make that dispatch curve is accurate a few days ago; Further, utilize once corrected electrical network operation plan a few days ago, contrast wind power real-time prediction value, consider network load value P
2, by+δ plan second-order correction electrical network operation plan a few days ago, prevent that prediction error is excessive, the problem such as cause that conventional unit output is significantly regulated, and the adjusting range that reduces as much as possible the 25%th district unit output plan of wind power prediction error band; Finally, by the Real-Time Scheduling plan in conjunction with the current running status of each unit, for system machine unit automatic generation amount is controlled (AGC) reserved nargin of regulating, and control (AGC) operation plan by the automatic generation amount and realize the accurate of dispatching of power netwoks, economy, the reliable execution.
After obtaining day level wind power predicted value, with day the stage load predicted value be combined, according to principle clean, economic, that optimize, formulate a day level operation plan.When power system operation, can obtain real-time wind power predicted value and network load value, 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, control strategy according to the dispatching of power netwoks multi-dimentional scale system shown in Fig. 2, to day the level operation plan carry out corresponding modify, constantly utilize real time data to be continued to correct to operation plan simultaneously, reach progressively the correction to the dispatching of power netwoks plan, make operation plan more accurate, reduce the error of wind-electricity integration operation plan.
With existing wind-electricity integration operation plan, compare; the present invention be take wind-electricity integration multidimensional scale system as basis; consider the time; predicated error; the impact of wind feature on operation plan; by the coupling between wide domain wind-powered interconnected electric power system operation plan; operation plan is progressive; reach the control purpose that reduces step by step wind-electricity integration operation plan error; improved the degree of carried out of operation plan, made power system dispatching plan cleaning, economy, optimize and taken into account system environments protection, economical operation, wind-powered electricity generation characteristic and system function optimization.
Claims (4)
1. a control method that reduces wind-electricity integration operation plan error, it is characterized in that described control method is: at first analyze wind-powered electricity generation power producing characteristics on the wide area time scale and on the impact of dispatching of power netwoks plan, comprise randomness that on the wide area time scale, wind-powered electricity generation is exerted oneself and on exert oneself wave characteristic and on the impact of dispatching of power netwoks plan of wind-powered electricity generation on the impact of dispatching of power netwoks plan, wide area time scale, and wind-powered electricity generation is exerted oneself intermittently and anti-peak regulation spy on the impact of dispatching of power netwoks plan; Then on wind-powered electricity generation power producing characteristics and the basis on dispatching of power netwoks plan impact thereof, set up the multidimensional scale system of wind-electricity integration power system dispatching plan on analysis wide area time scale; Set up the operation plan of mutually coordinating in multidimensional scale system, add the prioritization scheme of other operation plans in the operation plan under different scale.
2. according to the control method that reduces wind-electricity integration operation plan error claimed in 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 a second level, 5-15min level, 30-60 minute level and day 4 yardsticks of level; 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 that reduces wind-electricity integration operation plan error claimed in claim 2, it is characterized in that in described error band scale: described 25% error zone is that the wind-powered electricity generation prediction error absolute value of exerting oneself is not more than 25% zone; Described (25%+ δ) error zone is that the wind-powered electricity generation prediction error absolute value of exerting oneself is greater than the zone that 25% width is δ; Described (25%+ δ+∞) error zone is that the wind-powered electricity generation prediction error absolute value of exerting oneself is greater than the zone of 25%+ δ.
4. according to the control method that reduces wind-electricity integration operation plan error claimed in claim 1, it is characterized in that wind-powered electricity generation power producing characteristics on described wide area time scale and on the impact of dispatching of power netwoks plan be: under the different time yardstick, corresponding wind power prediction error is in the different error bands that wind-powered electricity generation exerts oneself on 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 the operation plan yardstick, between the scheduling of the different scale plan of exerting oneself, have coupled relation: wind-electricity integration operation plan corresponding to little wind power prediction error band that between hour, yardstick is corresponding is to obtain on the wind-electricity integration operation plan basis that larger wind power prediction error band corresponding to the time scale larger at upper level is corresponding;
Relation between operation plan on the operation plan yardstick is: operation plan is the basis of formulating the rolling scheduling plan a few days ago, the rolling scheduling plan is the basis of formulating the Real-Time Scheduling plan, and the Real-Time Scheduling plan is the basis of formulating the plan of automatic generation amount Control and Schedule; The wind power forecast data of day level of operation plan dependence a few days ago obtains, and day level wind power prediction error is larger, and 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 the Real-Time Scheduling plan relies on the 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 be take the Real-Time Scheduling plan as basis, according to the control strategy of " filling a vacancy flat remaining ", automatically eliminates the error of wind power forecast in 25% error zone;
When actual wind power is greater than the wind power predicted value of 5-15min level, " flat remaining " control strategy is carried out in wind turbine generator or the control plan of conventional energy resource generating set automatic generation amount Control and Schedule, reduce generating set and exert oneself, the generating set value of exerting oneself reduced is the difference of 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, " filling a vacancy " control strategy is carried out in the control plan of conventional energy resource generating set automatic generation amount Control and Schedule, increase generating set and exert oneself, the difference of the wind power predicted value that generating set value of exerting oneself of increase is actual wind power and 5-15min level;
After obtaining day level wind power predicted value, with day the stage load predicted value be combined, according to cleaning, economical, the principle of optimizing, formulate a day level operation plan, when power system operation, can access real-time wind power predicted value and network load value, utilize the grid-connected operation plan of described multidimensional scale system regulating wind power, 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, to day the level operation plan carry out corresponding modify, constantly utilize real time data to be continued to correct to operation plan simultaneously, reach progressively the correction to the dispatching of power netwoks plan, make operation plan more accurate, reduce the error of wind-electricity integration operation plan.
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