CN102510091A - Coordinate control method suitable for real time scheduling and AGC (Automatic Gain Control) after large scale photovoltaic grid connection - Google Patents

Abstract

The invention discloses a coordinate control method suitable for real time scheduling and AGC (Automatic Gain Control) after large scale photovoltaic grid connection. The coordinate control method comprises the following specific methods of: (1) a coordinate and match method of real time scheduling and AGC; (2) a coordinate control method of real time scheduling and AGC command 'reverse scheduling': determining occurrence of the real time scheduling and AGC 'reverse scheduling' by judging three factors, such as system frequency, adjusting direction and adjusting volume to cope with difficulty in frequency modulation and resource waste by way of locking a scheduling plan; and (3) a coordinate control method for transitional mutual conversion between real time scheduling and AGC adjusting volume: after active adjustment process of AGC is finished, output adjustment is carried out by real time scheduling to recover the maximum adjusting volume of an AGC unit. The coordinate control method disclosed by the invention has the advantages of sufficiently utilizing adjusting resources inside a power grid, optimizing a resource adjusting manner inside the power grid, and ensuring that scheduling and control commands reflect the active power adjusting requirement of the power grid at real time, thereby enhancing the dynamic adjusting capacity of the power grid to resist active disturbance photovoltaic grid connection, and further expressing the proficiency of real time scheduling and AGC coordinate control.

Description

The control method for coordinating of Real-Time Scheduling and AGC after the adaptation large-scale photovoltaic is incorporated into the power networks

Technical field

The invention belongs to field of power system control, be specifically related to a kind of be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic that adapts to.

Background technology

Photovoltaic generation has the characteristic of fluctuation, intermittence and " positive peak regulation ", and photovoltaic is different from frequency modulation, pressure regulation and the alternative characteristic of conventional energy resource simultaneously, has influenced the economy of electricity net safety stable and operation.The at present domestic planning construction that carries out large-scale photovoltaic generating base; Comprise that a plurality of provinces such as Ningxia, Gansu, Qinghai, Xinjiang carry out the concentrated development and use of large-scale photovoltaic; Take extensive exploitation, the centralized mode that is incorporated into the power networks concentrated; Thereby cause that subregion electrical network intermittent energy source permeability significantly increases, unit degree of depth peak regulation causes the subsequent use deficiency of peak load regulation network frequency modulation in photovoltaic is exerted oneself peak period net, thereby new forms of energy such as photovoltaic that electrical network dissolved are had higher requirement.Simultaneously electrical network is under the background of " priority scheduling and protection purchase in full " new forms of energy, and domestic trying to explore solves the large-scale photovoltaic predicament of being incorporated into the power networks through enlarging balance of electric power and ener scope and the modes such as flexibility that improve resource transfer.

At present domestic less to the be incorporated into the power networks research of back electric network active scheduling and control of large-scale photovoltaic; Because photovoltaic belongs to the new forms of energy important component part together with wind-powered electricity generation; Consider that from the net side both have identical characteristic; Influence to electrical network is comparatively similar, the research after scheduling and control strategy research help large-scale photovoltaic to be incorporated into the power networks after at present large-scale wind power being incorporated into the power networks.Electrical network is through generation schedule, real-time generation schedule (Real-Time Scheduling) and three levels of automatic generation control (AGC) are dissolved to the disturbance of new forms of energy introducing step by step a few days ago and in a few days; Existing wind-powered electricity generation, photovoltaic power information of forecasting have been made full use of to a certain extent; With wind-powered electricity generation, photovoltaic go out fluctuation can foresee the part regulate; AGC regulates subsequent usely in reducing net, and has played certain effect on the lifting AGC frequency modulation effect.Yet; Real-Time Scheduling (generation schedule in real time) utilizes ultrashort phase wind-powered electricity generation, photovoltaic power prediction and ultra-short term data to carry out the generation schedule correction at present; The ultrashort phase promotes than short-term wind-electricity, photovoltaic power precision of prediction to a certain extent to some extent; Still about 10%, but the uncertainty of wind-powered electricity generation, photovoltaic power prediction and load prediction has influenced the applying degree of real-time power network scheduling with the meritorious demand of actual electric network to error; Cause the instruction of Real-Time Scheduling unit or Real-Time Scheduling can not effectively reflect the meritorious regulatory demand of reality of electrical network, even cause Real-Time Scheduling and the reverse problem of AGC regulating command.Simultaneously, AGC had born the meritorious amount of unbalance adjusting of larger specific gravity after extensive new forms of energy were incorporated into the power networks, and AGC regulation and control pressure increases, and is prone to the not enough situation of pondage, was necessary to utilize Real-Time Scheduling between AGC reservation regulatory region, so that the recovery of AGC pondage.

Document one " the large-scale photovoltaic power station control strategy is to the influence of island network stability " (electric power network technique was rolled up the 20th page of the 15th phase in 2009 the 33rd) is through setting up the photovoltaic plant model; Analyzed and utilized under the current source modeling; The large-scale photovoltaic power supply is incorporated into the power networks the stability that influences electrical network; Proposed to utilize the photovoltaic DC-to-AC converter control system of auxiliary voltage and frequency, thereby ensured the stability of this island network so that photovoltaic plant possesses meritorious and idle regulating power simultaneously.

The large-scale photovoltaic power station control strategy that document one proposes is based on the factory station and holds the draught control system of gaining merit to improve the frequency adjustment demand of the reflection electrical network so that photovoltaic plant is exerted oneself, and is applicable to the system research of lonely net.Present stage the large-scale photovoltaic access interconnected network that is incorporated into the power networks; Consider from operation of power networks economy and energy-saving and emission-reduction angle; Be to be main, stress that the complementation that conventional energy resource and new forms of energy are exerted oneself coordinates to regulate the conventional energy resource unit, through the adjusting of conventional energy resource unit with the maximization regenerative resource of dissolving.The viewpoint of article is not suitable for present stage large-scale photovoltaic be incorporated into the power networks back electric network active scheduling and Control Study.

Document two " adapting to meritorious scheduling of interconnected network and controlling schemes that large-scale wind power inserts " (Automation of Electric Systems was rolled up the 41st page of the 17th phase in 2010 the 34th) has proposed to contain the meritorious scheduling of the regional power grid framework of wind energy turbine set control; And the regional power grid focus control mode that adapts to the extensive access of wind-powered electricity generation; And the existing multi-stage scheduling system of combination China; Proposed classification and coordinated control model, as a kind of transition to focus control mode.The control model that article proposes is mainly China's interconnected network large-scale wind power of dissolving and serves; What inquire into emphatically is under existing dispatching of power netwoks architectural framework; Province coordinates accent through net; Make full use of net and economize all kinds of adjusting resources of transferring, the impact that the wind-powered electricity generation fluctuation causes is dissolved in network-wide basis.

The meritorious scheduling of the regional power grid framework that contains wind energy turbine set control that document two proposes, the wind energy turbine set generation schedule is formulated in prediction according to wind power, and output of wind electric field is main with " generation schedule tracking ", and it is the control principle of assisting that the wind-powered electricity generation unit " is participated in frequency modulation directly ".Control model concentrates on the method for calling of main website side to system's controllable resources.Wind-powered electricity generation resource that proposition is interconnected through large regional grid, the resource unification is called, the mode of classification coordination control is dissolved.

Document three " a kind of wind-powered electricity generation optimized dispatching method of taking into account the power grid security constraint " (Automation of Electric Systems was rolled up the 71st page of the 15th phase in 2010 the 34th) has proposed a kind of according to interconnection plan between wind power prediction, network load prediction and province; Take into account constraintss such as electricity net safety stable, formulate the optimized dispatching method of output of wind electric field plan.The method that article proposes is mainly net and economizes scheduling mechanism coordination optimization and arrange the conventional energy resource unit, reserves the wind-powered electricity generation space of exerting oneself and guarantees the meritorious stable operation in the safety zone of exerting oneself of wind energy turbine set, farthest admits wind-powered electricity generation for electrical network and creates conditions.

The wind-powered electricity generation optimized dispatching method that document three proposes; Plan the balance of accomplishing that system's performance driving economy and wind-powered electricity generation at utmost insert through reasonable arrangement a few days ago; According to electrical network section, peak regulation, frequency modulation, pressure regulation constraints,, obtain wind energy turbine set active power security zone curve by wind energy turbine set meritorious exert oneself limit value and power variation rate limit value; Wind energy turbine set is followed the tracks of the safety zone curve, thereby guarantees that wind-powered electricity generation inserts the back power network safety operation.

Document four " the meritorious dispatching patcher design that the yardstick of many time of the large-scale wind power of dissolving is coordinated " (Automation of Electric Systems was rolled up the 1st page of the 1st phase in 2011 the 35th) has proposed to carry out " multilevel coordination; step thinning " scheduling method that departure is revised step by step; Be decomposed into plan a few days ago, rolling planning, Real-Time Scheduling plan and AGC four-stage to control; And set up and abandon the minimum meritorious scheduling model of wind; Through the coordination of Real-Time Scheduling and generation schedule, and the coordination of Real-Time Scheduling and AGC is dissolved to wind-powered electricity generation.The scheduling method that article proposes, primary study the scheduling and the control of yardstick of many time the meritorious disturbance of wind-powered electricity generation is regulated, through the public power prediction drift correction of wind-powered electricity generation, reduce to move the uncertain factor influence.

The scheduling method that document four proposes is decomposed into a second level, 5～15 minutes levels, 30～60 minutes levels, day level etc. on time dimension, planning execution optimal control a few days ago, rolling planning are rolled with Real-Time Scheduling and revised the side-play amount of predicting.Real-Time Scheduling and plan and AGC coordination are a few days ago mainly considered the recovery of error correction and AGC pondage.Not under the electrical network actual operating mode, Real-Time Scheduling and AGC coordinated control mode, instruction contents such as " the anti-accent " are explained in detail.

Summary of the invention

First purpose of the present invention is: consider that real-time generation schedule formulation is based on the photovoltaic power information of forecasting; The uncertainty of prediction causes that the meritorious demand of plan and operation of power networks exists and departs from that electrical network AGC participates in electrical network frequency modulation and regulates with Region control deviation ACE (Area Control Error), guarantees the qualified and interconnection power tracking planned value of mains frequency; Under the electrical network complex working condition; It is reverse Real-Time Scheduling and AGC adjusting direction unavoidably to occur, i.e. the generation of instruction " the anti-accent ", the Real-Time Scheduling and the AGC control method for coordinating of proposition solution instruction " the anti-accent "; Reduce of the influence of photovoltaic power prediction deviation, reduce to regulate the wasting of resources power grid control;

Second purpose of the present invention is: AGC has born the adjusting proportion of bigger meritorious amount of unbalance after being incorporated into the power networks to extensive new forms of energy; The meritorious pressure of regulating increases; For giving full play to the AGC regulating power, the disturbance regulated quantity with the AGC unit is born carries out the transition to the Real-Time Scheduling unit gradually; Real-Time Scheduling and AGC coordinate control and make full use of intrasystem effective adjusting resource, guarantee photovoltaic resources the safe, reliable and economic of process of dissolving.

In order to achieve the above object, the technical scheme that the present invention taked is:

A kind of be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic that adapts to is characterized in that: comprise the following steps:

(1), the cooperation method of Real-Time Scheduling and AGC: Real-Time Scheduling is taked planned value to issue or is directly issued the mode of remote regulating instruction and the cooperation of AGC;

The control method for coordinating of (2), Real-Time Scheduling and AGC instruction " the anti-accent ": through judging system frequency, regulating direction and three factors of pondage; Confirm that Real-Time Scheduling and AGC " the anti-accent " situation takes place; With the operation plan closedown mode, " instead transfer " the frequency modulation difficulty and the wasting of resources that brings with reply;

(3), after the meritorious adjustment process of Real-Time Scheduling and the transition of the AGC pondage mutual control method for coordinating that changes: AGC finishes; Real-Time Scheduling is exerted oneself adjustment to recover the maximal regulated capacity of AGC unit; Real-Time Scheduling is that AGC reserves between regulatory region; After the disturbance adjustment finished, the amount of unbalance pondage that AGC is born progressively carried out the transition to the Real-Time Scheduling unit.

Aforesaid a kind of be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic that adapts to is characterized in that: in the step (1), the cooperation method between Real-Time Scheduling and the AGC, can realize through following three kinds of modes:

1), in real time generation schedule issues separately, transfers part A GC unit as Real-Time Scheduling unit executive real-time generation schedule, all the other AGC units are still carried out the AGC control command;

2), AGC unit basic point power P _BWith the adjusting power P _R, AGC unit basic point power P _BAs real-time generation schedule, the AGC unit is regulated power P _RAs control command, stack obtains power of the assembling unit set point, and the AGC adjustable range is in the basic point power P _BIn the adjacent interval range, unit is after ACE regulates end, and unit output returns the basic point power P _B

3), dynamic assignment priority relatively, in conjunction with the adjustment process dynamic Decomposition of real-time generation schedule, carry out packet sequencing, the unit that is lower than planned value preferentially raises, the unit that is higher than planned value is preferentially reduced.

Aforesaid a kind of be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic that adapts to; It is characterized in that: in the step (2); The control method for coordinating of Real-Time Scheduling and AGC instruction " the anti-accent ": AGC has directly reflected the real-time running state of system; Belong to the hysteresis controlling unit, the priority of AGC control is higher than Real-Time Scheduling, in coordinating control, cannot interfere the AGC controlling unit; Need adjust system's Real-Time Scheduling, carry out real-time generation schedule correction and must satisfy following three conditions:

1), in system frequency recovery process, to be different from electrical network normal consistency and control;

2), Real-Time Scheduling and AGC regulate in the opposite direction, as " the anti-accent " sign between Real-Time Scheduling and the AGC;

3), the amplitude of accommodation of Real-Time Scheduling and AGC, the Real-Time Scheduling amplitude of accommodation is higher than carries out lock operation when setting threshold value,

Under the prerequisite that satisfies above-mentioned three conditions, Real-Time Scheduling is carried out lock operation to real-time generation schedule, keeps Real-Time Scheduling instruction state before locking, guarantees the operate as normal of electrical network AGC frequency modulation.

Aforesaid a kind of be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic that adapts to; It is characterized in that: in the step (3); The control method for coordinating that Real-Time Scheduling and the transition of AGC pondage are changeed mutually: AGC and Real-Time Scheduling are born the adjusting of the meritorious amount of unbalance under the different time yardstick respectively; The Real-Time Scheduling regulated quantity is that AGC reserves pondage recovery space, thereby the meritorious regulated quantity transition of realization Real-Time Scheduling and AGC is changeed mutually.

Aforesaid a kind of be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic that adapts to; It is characterized in that: generation schedule lock release condition is in real time; When AGC gets into operating dead zone; Real-Time Scheduling is recovered real-time generation schedule, traces into original real-time generation schedule operating point according to certain climbing rate.

Aforesaid a kind of be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic that adapts to; It is characterized in that: in the step (3); The control method for coordinating that Real-Time Scheduling and the transition of AGC pondage are changeed mutually: after meritorious disturbance adjustment process finished, Real-Time Scheduling was that AGC reserves the adjusting space, makes the involution of AGC unit operation point to the mid point between regulatory region of exerting oneself; Guarantee the fluctuation of the sufficient variable capacity reply of electrical network AGC photovoltaic power

N platform Real-Time Scheduling pondage is following:

$\underset{j=1}{\overset{n}{\mathrm{\Σ}}}\mathrm{\Δ}{P}_{\mathrm{Gj}}=\mathrm{\Δ}{P}_L+\mathrm{\Δ}{P}_T-\mathrm{\Δ}{P}_{\mathrm{WG}}-\underset{i=1}{\overset{m}{\mathrm{\Σ}}}\mathrm{\Δ}{P}_{\mathrm{Gi}}---\left(1\right)$

Δ P in the formula _LBe ultrashort phase and short-term load forecasting deviation; Δ P _TBe Tie line Power

With the planned value departure; Δ P _WGBe ultrashort phase and short-term photovoltaic power prediction deviation amount;

Be the adjustment amount that is in operation of m platform machine non real-time scheduling unit in the system;

The operating adjustment amount of non real-time scheduling unit; Comprising the meritorious adjustment amount of AGC unit in frequency-modulating process; The adjusting power of AGC progressively discharges and transfers in the Real-Time Scheduling unit in the perturbation process, and AGC unit operation point returns that the required adjustment capacity of mid point is between regulatory region:

$\mathrm{\Δ}{P}_{\mathrm{Gi}}=P_{\mathrm{Gi}}-\frac{(P_{\mathrm{Gi},\max }+P_{\mathrm{Gi},\min })}{2}---\left(2\right)$

P in the formula _GiBe the unit operation point; P _{Gi, max}For the AGC unit is regulated the upper limit; P _{Gi, min}For the AGC unit is regulated lower limit;

Through the adjustment capacity of the additional AGC unit of (2) formula, thereby guaranteed that Real-Time Scheduling is that AGC reserves the adjusting space, realizes the purpose of coming the regulating system amount of unbalance through Real-Time Scheduling.

The invention has the beneficial effects as follows: the present invention makes full use of and regulates resource in the electrical network; Optimize resource regulative mode in the net; Guarantee that scheduling and control command reflect the active power regulatory demand of electrical network in real time; Thereby improved the dynamic adjustments ability that electrical network is resisted grid-connected meritorious disturbance, further effectively brought into play the potential that Real-Time Scheduling and AGC coordinate control.

Embodiment

A kind of be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic that adapts to is characterized in that: comprise the following steps:

(1), the cooperation method of Real-Time Scheduling and AGC: Real-Time Scheduling takes planned value to issue or the mode that directly issues remote regulating instruction is different from the AGC remote control commands and issues; Cooperation mode between Real-Time Scheduling and the AGC can realize through following three kinds of modes.

1), in real time generation schedule issues separately, transfers part A GC unit as Real-Time Scheduling unit executive real-time generation schedule, all the other AGC units are still carried out the AGC control command;

2), AGC unit basic point power P _BWith the adjusting power P _R, AGC unit basic point power P _BAs real-time generation schedule, the AGC unit is regulated power P _RAs control command, stack obtains power of the assembling unit set point, and the AGC adjustable range is in the basic point power P _BIn the adjacent interval range, unit is after ACE regulates end, and unit output returns the basic point power P _B

3), dynamic assignment priority relatively, in conjunction with the adjustment process dynamic Decomposition of real-time generation schedule, carry out packet sequencing, the unit that is lower than planned value preferentially raises, the unit that is higher than planned value is preferentially reduced.

The control method for coordinating of (2), Real-Time Scheduling and AGC instruction " the anti-accent ": AGC has directly reflected the real-time running state of system; Belong to the hysteresis controlling unit; The priority of AGC control is higher than Real-Time Scheduling; In coordinating control, cannot interfere the AGC controlling unit, need adjust, carry out real-time generation schedule correction and must satisfy following three conditions system's Real-Time Scheduling:

1), in system frequency recovery process, to be different from electrical network normal consistency and control;

2), Real-Time Scheduling and AGC regulate in the opposite direction, as " the anti-accent " sign between Real-Time Scheduling and the AGC;

3, the amplitude of accommodation of Real-Time Scheduling and AGC, the Real-Time Scheduling amplitude of accommodation are higher than executive plan locking when setting threshold value.

Under the prerequisite that satisfies above-mentioned three conditions, Real-Time Scheduling is carried out lock operation to real-time generation schedule, keeps Real-Time Scheduling instruction state before locking, guarantees the operate as normal of electrical network AGC frequency modulation.Generation schedule lock release condition is in real time, and when AGC got into operating dead zone, Real-Time Scheduling was recovered real-time generation schedule, traces into original real-time generation schedule operating point according to certain climbing rate.

(3), the mutual control method for coordinating that changes of Real-Time Scheduling and the transition of AGC pondage:

After meritorious disturbance adjustment process finished, Real-Time Scheduling was that AGC reserves the adjusting space, makes the involution of AGC unit operation point to the mid point between regulatory region of exerting oneself, and guaranteed the fluctuation of the sufficient variable capacity reply of electrical network AGC photovoltaic power.

N platform Real-Time Scheduling pondage is following:

$\underset{j=1}{\overset{n}{\mathrm{\Σ}}}\mathrm{\Δ}{P}_{\mathrm{Gi}}=\mathrm{\Δ}{P}_L+\mathrm{\Δ}{P}_T-\mathrm{\Δ}{P}_{\mathrm{WG}}-\underset{i=1}{\overset{m}{\mathrm{\Σ}}}\mathrm{\Δ}{P}_{\mathrm{Gi}}---\left(1\right)$

Δ P in the formula _LBe ultrashort phase and short-term load forecasting deviation; Δ P _TBe Tie line Power and planned value departure; Δ P _WGBe ultrashort phase and short-term photovoltaic power prediction deviation amount;

Be the adjustment amount that is in operation of m platform machine non real-time scheduling unit in the system.

The operating adjustment amount of non real-time scheduling unit, comprising the meritorious adjustment amount of AGC unit in frequency-modulating process, the adjusting power of AGC progressively discharges and transfers in the Real-Time Scheduling unit in the perturbation process.The required adjustment capacity of mid point is between AGC unit operation point recurrence regulatory region:

$\mathrm{\Δ}{P}_{\mathrm{Gi}}=P_{\mathrm{Gi}}-\frac{(P_{\mathrm{Gi},\max }+P_{\mathrm{Gi},\min })}{2}---\left(2\right)$

P in the formula _GiBe the unit operation point; P _{Gi, max}For the AGC unit is regulated the upper limit; P _{Gi, min}For the AGC unit is regulated lower limit.

Through the adjustment capacity of the additional AGC unit of following formula, thereby guaranteed that Real-Time Scheduling is that AGC reserves the adjusting space, realizes the purpose of coming the regulating system amount of unbalance through Real-Time Scheduling.

More than show and described basic 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; That describes in the foregoing description and the specification just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection range to be defined by appending claims and equivalent thereof.

Claims (6)

1. one kind adapts to the be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic, it is characterized in that: comprise the following steps:

(1), the cooperation method of Real-Time Scheduling and AGC: Real-Time Scheduling is taked planned value to issue or is directly issued the mode of remote regulating instruction and the cooperation of AGC;

The control method for coordinating of (2), Real-Time Scheduling and AGC instruction " the anti-accent ": through judging system frequency, regulating direction and three factors of pondage; Confirm that Real-Time Scheduling and AGC " the anti-accent " situation takes place; With the operation plan closedown mode, " instead transfer " the frequency modulation difficulty and the wasting of resources that brings with reply;

(3), after the meritorious adjustment process of Real-Time Scheduling and the transition of the AGC pondage mutual control method for coordinating that changes: AGC finishes; Real-Time Scheduling is exerted oneself adjustment to recover the maximal regulated capacity of AGC unit; Real-Time Scheduling is that AGC reserves between regulatory region; After the disturbance adjustment finished, the amount of unbalance pondage that AGC is born progressively carried out the transition to the Real-Time Scheduling unit.

2. a kind of be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic that adapts to according to claim 1 is characterized in that: in the step (1), the cooperation method between Real-Time Scheduling and the AGC, can realize through following three kinds of modes:

1), in real time generation schedule issues separately, transfers part A GC unit as Real-Time Scheduling unit executive real-time generation schedule, all the other AGC units are still carried out the AGC control command;

2), AGC unit basic point power P _BWith the adjusting power P _R, AGC unit basic point power P _BAs real-time generation schedule, the AGC unit is regulated power P _RAs control command, stack obtains power of the assembling unit set point, and the AGC adjustable range is in the basic point power P _BIn the adjacent interval range, unit is after ACE regulates end, and unit output returns the basic point power P _B

3), dynamic assignment priority relatively, in conjunction with the adjustment process dynamic Decomposition of real-time generation schedule, carry out packet sequencing, the unit that is lower than planned value preferentially raises, the unit that is higher than planned value is preferentially reduced.

3. a kind of be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic that adapts to according to claim 2; It is characterized in that: in the step (2); The control method for coordinating of Real-Time Scheduling and AGC instruction " the anti-accent ": AGC has directly reflected the real-time running state of system; Belong to the hysteresis controlling unit, the priority of AGC control is higher than Real-Time Scheduling, in coordinating control, cannot interfere the AGC controlling unit; Need adjust system's Real-Time Scheduling, carry out real-time generation schedule correction and must satisfy following three conditions:

1), in system frequency recovery process, to be different from electrical network normal consistency and control;

2), Real-Time Scheduling and AGC regulate in the opposite direction, as " the anti-accent " sign between Real-Time Scheduling and the AGC;

3), the amplitude of accommodation of Real-Time Scheduling and AGC, the Real-Time Scheduling amplitude of accommodation is higher than carries out lock operation when setting threshold value,

Under the prerequisite that satisfies above-mentioned three conditions, Real-Time Scheduling is carried out lock operation to real-time generation schedule, keeps Real-Time Scheduling instruction state before locking, guarantees the operate as normal of electrical network AGC frequency modulation.

4. a kind of be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic that adapts to according to claim 3; It is characterized in that: in the step (3); The control method for coordinating that Real-Time Scheduling and the transition of AGC pondage are changeed mutually: AGC and Real-Time Scheduling are born the adjusting of the meritorious amount of unbalance under the different time yardstick respectively; The Real-Time Scheduling regulated quantity is that AGC reserves pondage recovery space, thereby the meritorious regulated quantity transition of realization Real-Time Scheduling and AGC is changeed mutually.

5. a kind of be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic that adapts to according to claim 4; It is characterized in that: generation schedule lock release condition is in real time; When AGC gets into operating dead zone; Real-Time Scheduling is recovered real-time generation schedule, traces into original real-time generation schedule operating point according to certain climbing rate.

6. a kind of be incorporated into the power networks control method for coordinating of back Real-Time Scheduling and AGC of large-scale photovoltaic that adapts to according to claim 5; It is characterized in that: in the step (3); The control method for coordinating that Real-Time Scheduling and the transition of AGC pondage are changeed mutually: after meritorious disturbance adjustment process finished, Real-Time Scheduling was that AGC reserves the adjusting space, makes the involution of AGC unit operation point to the mid point between regulatory region of exerting oneself; Guarantee the fluctuation of the sufficient variable capacity reply of electrical network AGC photovoltaic power

N platform Real-Time Scheduling pondage is following:

$\underset{j=1}{\overset{n}{\mathrm{\Σ}}}\mathrm{\Δ}{P}_{\mathrm{Gj}}=\mathrm{\Δ}{P}_L+\mathrm{\Δ}{P}_T-\mathrm{\Δ}{P}_{\mathrm{WG}}-\underset{i=1}{\overset{m}{\mathrm{\Σ}}}\mathrm{\Δ}{P}_{\mathrm{Gi}}---\left(1\right)$

Δ P in the formula _LBe ultrashort phase and short-term load forecasting deviation; Δ P _TBe Tie line Power and planned value departure; Δ P _WGBe ultrashort phase and short-term photovoltaic power prediction deviation amount;

Be the adjustment amount that is in operation of m platform machine non real-time scheduling unit in the system;

The operating adjustment amount of non real-time scheduling unit; Comprising the meritorious adjustment amount of AGC unit in frequency-modulating process; The adjusting power of AGC progressively discharges and transfers in the Real-Time Scheduling unit in the perturbation process, and AGC unit operation point returns that the required adjustment capacity of mid point is between regulatory region:

$\mathrm{\Δ}{P}_{\mathrm{Gi}}=P_{\mathrm{Gi}}-\frac{(P_{\mathrm{Gi},\max }+P_{\mathrm{Gi},\min })}{2}---\left(2\right)$

P in the formula _GiBe the unit operation point; P _{Gi, max}For the AGC unit is regulated the upper limit; P _{Gi, min}For the AGC unit is regulated lower limit;

Through the adjustment capacity of the additional AGC unit of (2) formula, thereby guaranteed that Real-Time Scheduling is that AGC reserves the adjusting space, realizes the purpose of coming the regulating system amount of unbalance through Real-Time Scheduling.