CN103151773A - Province power grid coordination control method for area control error based on optimized algorithm - Google Patents

Abstract

The invention provides a province power grid coordination control method for an area control error (ACE) based on an optimized algorithm and belongs to the technical field of power system automatic control. The method is characterized in that an optimized problem is solved, and accordingly smallest target modulation amount of secondary frequency modulation which meets modulation requirements in the ACE systems of province modulation and power grid modulation is obtained, and rapidest area control error restraint is achieved. The method is simple in algorithm and small in calculation amount, can be used in modulation automatic systems in area power systems and provincial power systems in China, can help an area power grid to improve area active power balanced control levels and improves operation quality and stability of the power grid.

Description

Region control deviation net based on optimized algorithm is economized control method for coordinating

Technical field

The present invention relates to the control technique in power system field, be specifically related to a kind of Region control deviation net based on optimized algorithm and economize control method for coordinating.

Background technology

Along with the lasting expansion of electrical network scale, large regional grid is interconnected progressively to be realized.When the large-sized connection electrified wire netting tie-line power transmission was larger, power fluctuation may cause the interconnection transmission power to surpass steady state stability limit, the safe and stable operation of serious threat electrical network.In addition, interconnection tie power fluctuation can cause the voltage fluctuation of two ends electrical network, and this fluctuation increases along with the increase of carrying trend, may threaten electrical network and equipment safety operation if lack idle control device.Therefore, the power fluctuation of controlling the large regional grid interconnection is very important, is the basis of large power network safety operation.The basic reason of the power fluctuation of Da Qu interconnection is regional real power control deviation (ACE).Regional power grid is comprised of all provincial power networks in this zone, and the ACE in whole zone is approximately each provincial power network ACE sum.The means of the direct control area ACE of regional power grid are exactly to regulate network regulation directly to transfer exerting oneself of unit at present, control effect sometimes not ideal, main cause is that the adjustment means are limited, regulate larger meritorious deviation with less generator, cause the generator of each participation adjustment all will bear larger meritorious regulated quantity, sometimes be difficult to get a desired effect.The idea of expection is: economize by net and coordinate to control, transfer the adjusting behavior of unit to include in the control of regional interconnection with economizing, larger adjustment amount is shared on more generator, and the regulated quantity that every generator need to be born just reduces relatively, can reach sooner the control target of expection.

Summary of the invention

The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or provides at least a kind of useful business to select.For this reason, the object of the invention is to propose a kind of algorithm simple, the Region control deviation net based on optimized algorithm that amount of calculation is little is economized control method for coordinating.

Economize control method for coordinating according to the Region control deviation net based on optimized algorithm of the embodiment of the present invention, comprise the following steps: S1: calculated data is carried out initialization, comprising: setting regions electrical network ACE upper limit ACE _{Q_sup}, regional power grid ACE lower limit ACE _{Q_inf}, an i provincial power network ACE upper limit ACE _{Pi_sup}With i provincial power network ACE lower limit ACE _{Pi_inf}, wherein, i=1,2 ..., n, n is; I provincial power network ACE value ACE of current time _pi, i=1,2 ..., n; Network regulation is adjusted power plant and is exerted oneself and the difference sum Δ P that plans _qS2: set n+1 optimized variable, comprise the frequency modulation frequency modulation target adjustment amount Δ A of n provincial power network AGC system _pi(i=1,2 ..., n) and the frequency modulation frequency modulation target adjustment amount Δ A of network regulation AGC _qS3: determine that optimization aim is Described optimization aim makes network regulation and each province transfer the regulated quantity of frequency modulation frequency modulation all as far as possible little; S4: determine constraints, described constraints comprises: through after frequency modulation frequency modulation, regional power grid ACE is less than predetermined threshold value, and provincial power network ACE is less than predetermined threshold value; And S5: utilize optimized algorithm and software solution optimization method:

$\min \underset{i=1}{\overset{n}{\mathrm{\Σ}}}\mathrm{\Δ}{A}_{\mathrm{pi}}^2+\mathrm{\Δ}{A}_q^2$

s.t. ${\mathrm{ACE}}_{q\_\inf }\≤{\mathrm{ACE}}_{q\_\mathrm{after}\_\mathrm{adjustment}}=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}({\mathrm{ACE}}_{\mathrm{pi}}+\mathrm{\Δ}{A}_{\mathrm{pi}})+\mathrm{\Δ}{P}_q+\mathrm{\Δ}{A}_q\≤{\mathrm{ACE}}_{q\_\sup }$

ACE _{pi_inf}≤ACE _{pi_after_adjustment}=ACE _pi+ΔA _pi≤ACE _{pi_sup}

Solve Δ A _pi(i=1,2 ..., n) with Δ A _q, the input network regulation is transferred the AGC system with province, carries out frequency modulation frequency modulation.

The present invention introduces electric power system according to the performance characteristics of electric power system frequency modulation frequency modulation with new regional active balance control method, has proposed to economize control method for coordinating based on the Region control deviation net of optimized algorithm.The present invention obtains the satisfied frequency modulation frequency modulation target adjustment amount of regulating the minimum that requires of each province's accent and network regulation AGC system by the solving-optimizing problem, realize that the Region control deviation suppresses the most fast, in order to improve regional active balance control performance, can help more fast and effeciently equilibrium region hair electricity of large regional grid, promote the regional power grid frequency stabilization, improve the large regional grid interconnection and control level, thereby increase running quality and the stability of electrical network.Particularly, following advantage is arranged: the provincial power network frequency modulation frequency modulation target adjustment amount and the network regulation frequency modulation frequency modulation target adjustment amount that utilize optimized algorithm to calculate in (1) the present invention, both can all be in the threshold value of setting so that the net after adjusting is economized ACE, can guarantee that again adjustment amount reaches minimum, realizes that the Region control deviation suppresses the most fast.(2) Optimized model in the present invention is the quadratic programming model with linear restriction, and this model has ripe algorithm, can greatly dwindle computing time, guarantees control rate.(3) the present invention can help the horizontal performance of regional power grid company's regional active balance control of raising, increases running quality and the stability of electrical network.

Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.

Description of drawings

Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:

Fig. 1 is the flow chart of economizing control method for coordinating based on the Region control deviation net of optimized algorithm of the present invention.

Embodiment

The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, be intended to for explanation the present invention, and can not be interpreted as limitation of the present invention.

in description of the invention, it will be appreciated that, term " " center ", " vertically ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.

In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is two or more, unless clear and definite concrete restriction is separately arranged.

In the present invention, unless clear and definite regulation and restriction are separately arranged, broad understanding should be done in the terms such as term " installation ", " being connected ", " connection ", " fixing ", for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be also to be electrically connected to; Can be directly to be connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.

In the present invention, unless clear and definite regulation and restriction are separately arranged, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, can comprise that also the first and second features are not directly contacts but by the other feature contact between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that the First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under Second Characteristic and tiltedly, or only represent that the First Characteristic level height is less than Second Characteristic.

The present invention obtains the satisfied frequency modulation frequency modulation target adjustment amount of regulating the minimum that requires of each province's accent and network regulation AGC system by the solving-optimizing problem, realizes Region control deviation inhibition the most fast.As shown in Figure 1, the present invention follows these steps to concrete enforcement:

Step (1): calculated data initialization

Set: regional power grid ACE upper limit ACE _{Q_sup}Regional power grid ACE lower limit ACE _{Q_inf}I provincial power network ACE upper limit ACE _{Pi_sup}I provincial power network ACE lower limit ACE _{Pi_inf}I=1,2 ..., n.

Given: i provincial power network ACE value ACE of current time _pi, i=1,2 ..., n; Network regulation is adjusted power plant and is exerted oneself and the difference sum Δ P that plans _q

Step (2): set optimized variable

Optimized variable has n+1: the frequency modulation frequency modulation target adjustment amount Δ A that is respectively n provincial power network AGC system _pi(i=1,2 ..., n) and the frequency modulation frequency modulation target adjustment amount Δ A of network regulation AGC _q

Step (3): determine optimization aim

Optimization aim is:

This optimization aim can make network regulation and each province transfer the regulated quantity of frequency modulation frequency modulation all as far as possible little, is that the AGC system in whole zone reaches the adjusting target as early as possible.

Step (4): determine constraints

1. after passing through frequency modulation frequency modulation, regional power grid ACE must be in threshold value:

${\mathrm{ACE}}_{q\_\inf }\≤{\mathrm{ACE}}_{q\_\mathrm{after}\_\mathrm{adjustment}}=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}({\mathrm{ACE}}_{\mathrm{pi}}+\mathrm{\Δ}{A}_{\mathrm{pi}})+\mathrm{\Δ}{P}_q+\mathrm{\Δ}{A}_q\≤{\mathrm{ACE}}_{q\_\sup }$

2. after passing through frequency modulation frequency modulation, provincial power network ACE must be in threshold value:

ACE _{pi_inf}≤ACE _{pi_after_adjustment}=ACE _pi+ΔA _pi≤ACE _{pi_sup}，i=1,2,...,n。

Step (5): separate optimization problem:

Utilize relevant optimized algorithm and software to find the solution following quadratic programming problem with linear restriction:

$\min \underset{i=1}{\overset{n}{\mathrm{\Σ}}}\mathrm{\Δ}{A}_{\mathrm{pi}}^2+\mathrm{\Δ}{A}_q^2$

s.t. ${\mathrm{ACE}}_{q\_\inf }\≤{\mathrm{ACE}}_{q\_\mathrm{after}\_\mathrm{adjustment}}=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}({\mathrm{ACE}}_{\mathrm{pi}}+\mathrm{\Δ}{A}_{\mathrm{pi}})+\mathrm{\Δ}{P}_q+\mathrm{\Δ}{A}_q\≤{\mathrm{ACE}}_{q\_\sup }$

ACE _{pi_inf}≤ACE _{pi_after_adjustment}=ACE _pi+ΔA _pi≤ACE _{pi_sup}

Solve Δ A _pi(i=1,2 ..., n) with Δ A _q, the input network regulation is transferred the AGC system with province, is used for frequency modulation frequency modulation.

The present invention introduces electric power system according to the performance characteristics of electric power system frequency modulation frequency modulation with new regional active balance control method, has proposed to economize control method for coordinating based on the Region control deviation net of optimized algorithm.The present invention obtains the satisfied frequency modulation frequency modulation target adjustment amount of regulating the minimum that requires of each province's accent and network regulation AGC system by the solving-optimizing problem, realize that the Region control deviation suppresses the most fast, in order to improve regional active balance control performance, can help more fast and effeciently equilibrium region hair electricity of large regional grid, promote the regional power grid frequency stabilization, improve the large regional grid interconnection and control level, thereby increase running quality and the stability of electrical network.Particularly, following advantage is arranged:

1) the provincial power network frequency modulation frequency modulation target adjustment amount and the network regulation frequency modulation frequency modulation target adjustment amount that utilize optimized algorithm to calculate in the present invention, both can all be in the threshold value of setting so that the net after adjusting is economized ACE, can guarantee that again adjustment amount reaches minimum, realizes that the Region control deviation suppresses the most fast.

2) Optimized model in the present invention is the quadratic programming model with linear restriction, and this model has ripe algorithm, can greatly dwindle computing time, guarantees control rate.

3) the present invention can help the horizontal performance of regional power grid company's regional active balance control of raising, increases running quality and the stability of electrical network.

The Region control deviation net based on optimized algorithm that the present invention proposes is economized control method for coordinating and can be practically applicable among the dispatch automated system of China's regional power system and Provincial Electric Power System, can help regional power grid to improve the horizontal performance of regional active balance control, increase running quality and the stability of electrical network, produce significant economic and social benefit.

need to prove, describe and to be understood in flow chart or in this any process of otherwise describing or method, expression comprises the module of code of the executable instruction of the step that one or more is used to realize specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can be not according to order shown or that discuss, comprise according to related function by the mode of basic while or by opposite order, carry out function, this should be understood by the embodiments of the invention person of ordinary skill in the field.

In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.

Although the above has illustrated and has described embodiments of the invention, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art is not in the situation that break away from principle of the present invention and aim can change above-described embodiment within the scope of the invention, modification, replacement and modification.

Claims (1)

1. the Region control deviation net based on optimized algorithm is economized control method for coordinating, it is characterized in that, comprises the following steps:

S1: calculated data is carried out initialization, comprising: setting regions electrical network ACE upper limit ACE _{Q_sup}, regional power grid ACE lower limit ACE _{Q_inf}, an i provincial power network ACE upper limit ACE _{Pi_sup}With i provincial power network ACE lower limit ACE _{Pi_inf}, wherein, i=1,2 ..., n, n is; I provincial power network ACE value ACE of current time _pi, i=1,2 ..., n; Network regulation is adjusted power plant and is exerted oneself and the difference sum Δ P that plans _q

S2: set n+1 optimized variable, comprise the frequency modulation frequency modulation target adjustment amount Δ A of n provincial power network AGC system _pi(i=1,2 ..., n) and the frequency modulation frequency modulation target adjustment amount Δ A of network regulation AGC _q

S3: determine that optimization aim is

Described optimization aim makes network regulation and each province transfer the regulated quantity of frequency modulation frequency modulation all as far as possible little;

S4: determine constraints, described constraints comprises: through after frequency modulation frequency modulation, regional power grid ACE is less than predetermined threshold value, and provincial power network ACE is less than predetermined threshold value; And

S5: utilize optimized algorithm and software solution optimization method:

$\min \underset{i=1}{\overset{n}{\mathrm{\Σ}}}\mathrm{\Δ}{A}_{\mathrm{pi}}^2+\mathrm{\Δ}{A}_q^2$

s.t. ${\mathrm{ACE}}_{q\_\inf }\≤{\mathrm{ACE}}_{q\_\mathrm{after}\_\mathrm{adjustment}}=\underset{i=1}{\overset{n}{\mathrm{\Σ}}}({\mathrm{ACE}}_{\mathrm{pi}}+\mathrm{\Δ}{A}_{\mathrm{pi}})+\mathrm{\Δ}{P}_q+\mathrm{\Δ}{A}_q\≤{\mathrm{ACE}}_{q\_\sup }$

ACE _{pi_inf}≤ACE _{pi_afer_adjustment}=ACE _pi+ΔA _pi≤ACE _{pi_sup}

Solve Δ A _pi(i=1,2 ..., n) with Δ A _q, the input network regulation is transferred the AGC system with province, carries out frequency modulation frequency modulation.

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