CN106127342A - A kind of transregional interconnection transaction optimization method based on SCUC - Google Patents

Abstract

The invention provides a kind of transregional interconnection transaction optimization method based on SCUC, it includes setting the electrical network in input and output region, unit, the parameter of transregional interconnection；Select trans-regional electricity transaction forecasting edited method；Build input and output associating security constraint Unit Combination model and seismic responses calculated.The technical scheme that the present invention provides improves under different regions and different electrical power type, the specific aim of electricity transaction forecasting edited, and whether the capacity that can assess transregional interconnection meets dilatation needs, provides technical support for interconnection increase-volume.

Description

A kind of transregional interconnection transaction optimization method based on SCUC

Technical field

The present invention relates to the optimization method of electricity market and field of electric power automation, a kind of based on SCUC Transregional interconnection transaction optimization method.

Background technology

The Chinese government pays much attention to the exploitation of clean energy resource, even by clean energy resource generating and clean energy resource on a large scale Distribute rationally and rise to national strategy height.Along with the appearance of China's a series of new forms of energy development policies, extensive clean energy resource Exploitation become and improve energy resource structure, build low-carbon type society, holding economy and the major action of social sustainable development.

Come with clean energy resource large-scale grid connection is a difficult problem of dissolving for a series of clean energy resource: on the one hand, due to Clean energy resource is many on a large scale is limited by area power grid load level and power supply architecture away from load center, the tune of clean energy resource Degree runs and receives pressure huge, abandons wind, to abandon regimen condition serious；On the other hand, the internal main force's power plant construction of end system and electricity consumption Demand growth speed is not mated, and causes many provinces and cities to occur that large area is rationed the power supply, needs long-distance transmissions substantial amounts of for alleviation Voltage force Electric energy, the degree of dependence carrying out electric power for this input system external improves constantly.And clean energy resource is carried out transregional transaction with big Scope is dissolved and is solved clean energy resource to be difficult to the effective way of on-site elimination problem by being, meets input system external simultaneously Carry out the dependence of electric power.

Global energy the Internet thinking is the key that clean energy resource substitutes and electric energy substitutes, and is to ensure that whole world clean energy resource is high The platform of effect exploitation；The development plan of national grid whole nation synchronised grids is also to promote most optimum distribution of resources, peak regulation resource complementation Effective way.Along with progressively the building up of extra-high voltage backbone network of " looped network indulged in three horizontal strokes three ", between net, ability to transmit electricity obtains quickly Strengthen, provide broad space for the most transregional most optimum distribution of resources.

It is directed to China and needs to develop the urgent needs of clean energy resource, and China's electrical network present situation and clean energy resource are dissolved Contradiction, needs the angle configured on a large scale from resource, by optimizing transregional clean energy resource trading electricity, for different regions With different electrical power type, make full use of existing passway for transmitting electricity, innovate mode of doing business, it is achieved the lean of transregional trading electricity is certainly Plan, improves the situation of the many decision-makings artificially of existing transregional trading electricity, studies and promotes that clean energy resource is reliable by Market Approach Dissolve and there is scheme and the prediction scheme of practice significance.

For meeting the needs of prior art, the present invention provides a kind of trans-regional interconnection transaction optimization side based on SCUC Method.

Summary of the invention

For meeting the needs of prior art, the present invention provides a kind of optimum transregional interconnection trading electricity, promotes cleaning energy The interconnection electricity transaction scheme that source maximum is dissolved.

The transregional interconnection transaction optimization method that the present invention provides, it thes improvement is that, described optimization method includes:

(1) input, the parameter of output area are set；

(2) trans-regional electricity transaction forecasting edited method is selected；

(3) input and output associating security constraint Unit Combination model is built；

(4) Optimized model.

Further, in described step (1),

(1-1) input area, output area and transregional DC link between the two and other interconnection are determined；

(1-2) input area and the electrical network of output area, unit and the physics of transregional interconnection and economic parameters are determined.

Further, described step (2) includes,

(2-1) determine the peak interval of time of interconnection electric power, optimize peak valley ratio as the following formula；

Shown in valley power such as following formula (1):

P_tieD(i_tie)=R_D*P_Max(i_tie) (1)

Shown in peak power such as following formula (2):

P_tieU(i_tie)=R_U*P_Max(i_tie) (2)

Wherein, peak ratio and low ebb proportionate relationship such as following formula (3) are shown:

R_U≥R_D (3)

In above formula, P_tieD(i_tie): interconnection i_tieThe power value of low-valley interval；P_tieU(i_tie): interconnection i_tiePeak period Power value；P_Max(i_tie): interconnection i_tieMaximum delivery capacity；R_D: valley power and the ratio of interconnection maximum delivery electric power Value；R_U: peak power and the ratio of interconnection maximum delivery electric power；P_Max(i_tie): interconnection i_tieMaximum delivery capacity；

(2-2) determine the peak valley ratio of interconnection electric power, optimize peak interval of time as the following formula；

Fully optimized period for once low ebb uprises moment and the moment of a peak step-down paddy at peak；

Interconnection state U_tie(i_tie, t) as shown in following formula (4):

$U_{tie}(i_{tie},t)={\Σ}_{t_1}^t{U}_{startUp}(i_{tie},t)-{\Σ}_{t_1}^t{U}_{startDown}(i_{tie},t)---\left(4\right)$

Interconnection electric power P_tie(i_tie, t) as shown in following formula (5):

$\begin{array}{c}{P}_{tie}(i_{tie},t)=\\ U_{tie}(i_{tie},t)*P_{TieMax}\left(i_{tie}\right)*R_U\left(i_{tie}\right)+(1-U_{tie}(i_{tie},t\left)\right)*P_{TieMax}\left(i_{tie}\right)*R_D\left(i_{tie}\right)\end{array}---\left(5\right)$

Wherein, U_startUp(i_tie, t): interconnection i_tieThe change from low ebb to peak in the t period, represents with 0 or 1； U_startDown(i_tie, t): interconnection i_tieThe change from peak to low ebb in the t period, represents with 0 or 1；R_U(i_tie) and R_D(i_tie): Represent low ebb and peak power ratio on interconnection respectively；U_tie(i_tie, t): if U_tie(i_tie, t)=1, represent interconnection i_tie? The t period is in peak period；If U_tie(i_tie, t)=0, represent interconnection i_tieIn the period at a low ebb t period；P_TieMax (i_tie): interconnection i_tiePeak power limit value；

(2-3) do not limit peak valley ratio, freely optimize.

Further, in described step (3), including set up based on input and output conjunctive model purchase, sell, defeated associating safety Constraint Unit Combination model；

Shown in the object function of described built-up pattern such as following formula (6):

$\max CleanEnergy={\mathrm{\Σ}}_{i_{ce},t}{p}_i(i_{ce},t,b)*\frac{T_{\mathrm{Pr}dMin}}{60}---\left(6\right)$

Wherein, max CleanEnergy: the clean energy resource maximum amount of dissolving；i_ce: clean energy resource unit；p_i(i_ce, t, b): district The unit i of territory b_ceExerting oneself of moment t；T_PrdMin: the time number to be divided into unit that a time interval comprises.

Further, described step (3) including:

(3-1) thermoelectricity minimum operational mode constraint；

Shown in minimum start number of units such as following formula (7) of region fired power generating unit:

${\mathrm{\Σ}}_{i_{ce}}{I}_{sGU}(i_{ce},g,b)*U_i(i_{ce},t,b)\≥N_{umMinOn}(g,b)---\left(7\right)$

Shown in minimum start capacity such as following formula (8) of region fired power generating unit:

${\mathrm{\Σ}}_{i_{ce}}{I}_{sGU}(i_{ce},g,b)*P_i(i_{ce},t,b)\≥C_{apMinOn}(g,b)---\left(8\right)$

In above formula, N_umMinOn(g, b): the minimum start number of units of the machine group g of region b；C_apMinOn(g, b): the machine of region b The minimum start capacity of group g；I_sGU(i_ce, g, b): represent with 0 or 1, I_sGU(i_ce, g, b)=1 represents the unit i of region b_ce? In machine group b；U_i(i_ce, t, b): the unit i of region b_ceStart and stop state at moment t；

(3-2) constraint of guarantee input area receiving wish:

Input area abandons wind-powered electricity generation amount not to be increased as shown in following formula (9):

Wherein b ∈ S_etBrchbuy(9)

Wherein, P_FW(t, b): input area b is at the prediction wind-powered electricity generation electric power of moment t；P_i(i_wd, t, b): the wind of input area b Group of motors i_wdExerting oneself of moment t；R_AW(b): region b abandons wind ratio；S_etBrchbuy: power purchase regional ensemble；

The purchases strategies C of input area_TBB () does not increase as shown in following formula (10):

Wherein, C_i(i, t, b): the Wind turbines i of the region b cost of electricity-generating when moment t；S_i(i, t b) represent region b The Wind turbines i start-up and shut-down costs when moment t；d_tie(i_tie, t, b): interconnection i_tieAt moment t at the direction of region b, d_tie (i_tie, t, b)=1 represents to be entered, d_tie(i_tie, t, b)=-1 represent and send；Pr_tie(i_tie, t, b) represent interconnection i_tieTime Carve the t price at region b；I_sTieOp(i_tie): represent with 0 or 1, I_sTieOp(i_tie)=1 item represents i_tieIt is that the interconnection optimized becomes Amount；C_B: original purchases strategies；

Further, in described step (3), DC link operation constraint includes:

Shown in i, interconnection capacity such as following formula (11):

0≤P_tie(i_tie,t)≤P_TieMax(i_tie) (11)

In formula, P_TieMax(i_tie): the peak power limit value of interconnection；

Ii, adjacent time interval DC line adjustment speed such as following formula (12) shown in:

$\left\{\begin{array}{c}{R}_{ampUp}(i_{tie},t)\mathrm{\Δ}t\≥P_{tie}(i_{tie},t)-P_{tie}(i_{tie},t-1)\\ R_{ampDown}(i_{tie},t)\mathrm{\Δ}t\≥P_{tie}(i_{tie},t-1)-P_{tie}(i_{tie},t)\end{array}\right.---\left(12\right)$

In formula, R_ampUp(i_tie, t): interconnection i_tieCreep speed at moment t；R_ampDown(i_tie, t): interconnection i_tie? The landslide speed of moment t；The gap length of Δ t: time period；

Iii, the increase and decrease of interconnection adjacent time interval power can not incorgruous adjust；

Dominant eigenvalues adjusts shown in state such as following formula (13):

x⁺(i_tie,t)+x^-(i_tie, t)=x (i_tie,t)≤1 (13)

Shown in the change of dominant eigenvalues value such as following formula (14):

$\left\{\begin{array}{c}{M}_1{z}_1(i_{tie},t)\≥P_{tie}(i_{tie},t)-P_{tie}(i_{tie},t-1)\\ M_2{z}_2(i_{tie},t)\≥P_{tie}(i_{tie},t-1)-P_{tie}(i_{tie},t)\\ x^{+}(i_{tie},t)\≥z_1\left(\right(i_{tie},t\left)\right)\end{array}\right.---\left(14\right)$

In above formula, x⁺(i_tie, t): each period direct current sends power whether positive change；x-(i_tie, t): each period Direct current sends power whether inverse change；z₁(i_tie, t) and z₂(i_tie, t) for the auxiliary variable represented with 0 or 1；M₁And M₂It is auxiliary Help on the occasion of parameter；

Shown in the interval such as following formula (15) that iv, interconnection direct current adjust:

$I_{sTieStart}(i_{tie},t)-{\mathrm{\Σ}}_{\mathrm{\τ}=t+1}^{t+N_T}{I}_{sTieEnd}(i_{tie},\mathrm{\τ})\≤1---\left(15\right)$

Interconnection i_tieShown in the basis for estimation such as following formula (16) of moment t state:

$\left\{\begin{array}{c}{I}_{sTieStart}(i_{tie},t)\≥x(i_{tie},t+1)-y(i_{tie},t)\\ I_{sTieEnd}(i_{tie},t)\≥x(i_{tie},t)-y(i_{tie},t)\end{array}\right.---\left(16\right)$

In above formula, N_T: DC line i_tieMinimum adjustment interval period number；y(i_tie, t) auxiliary for representing with 0 or 1 becomes Amount.

Further, in described step (4), in input and output associating security constraint Unit Combination model described in linear expression Non-linear factor, and use Integer programming to calculate the electric power of transregional interconnection and the Unit Commitment of input/output terminal With exert oneself.

Moreover with immediate prior art ratio, the present invention has a following excellent effect:

1) technical scheme that the present invention provides is dissolved as optimization aim with clean energy resource maximum, by optimizing transregional interconnection Trading electricity, and input, the Unit Commitment of output area and exert oneself and promote that the maximum of clean energy resource is dissolved, promote cleaning energy The receiving ability in source；Foundation considers input area, output area, passway for transmitting electricity, contains physics operation, economical operation etc. no With the purchasing of type constraint, sell, defeated combined optimization model, it is achieved the trans-regional quantitative Analysis dissolved of clean energy resource, when solving long Between clean energy resource trans-regional digestion capability evaluation problem in yardstick.

2) technical scheme that the present invention provides is for different regions and different electrical power type, utilizes interregional electric power resource Peak-valley difference, time difference, load difference, make full use of existing passway for transmitting electricity, optimizes interregional interconnection electrical force profiles；Exploitation cleaning energy Source the most medium-term and long-term transregional electricity transaction optimized algorithm, utilizes the peak-valley difference of interregional electric power resource, time difference, load difference, real Existing interregional interconnection electrical force profiles optimizes, and promotes clean energy resource and dissolves level；Arrange for trans-regional clean energy resource mode of doing business Technological means is provided, promotes clean energy resource transaction lean operation level.

3) technical scheme that the present invention provides is based on security constraint Unit Combination, it is possible to the core of simulation establishment generation schedule Thimble saves, it is possible to promote the operational efficiency of high energy efficiency large-sized unit, makes unit operation at best operating point as far as possible, promotes system Economy and energy saving, provide basis for Economic Dispatch and Security Checking；The wind-powered electricity generation of optimized evaluation outfan electrical network Digestion capability, the wind-powered electricity generation of input electrical network receive ability, can take precautions against large-scale wind power in advance grid-connected to electric power netting safe running band The risk come, can receive the ability of wind-powered electricity generation, can be that dispatcher is carried out a few days ago with electrical network under depth perception current operating environment Generation schedule is formulated, real time execution controls to provide effective technical support, substantially increases electrical network after large-scale wind power accesses Safety operation level and wind electricity digestion capability.

4) technical scheme proposes fixing peak-to-valley ratio, fixing peak interval of time, does not limit the cleaning energy such as curve shape Source transregional electricity transaction transprovincially forecasting edited method, it is achieved clean energy resource difference is dissolved many scene comparison of scheme, improves not Under same area and different electrical power type, the specific aim of electricity transaction forecasting edited, can be with the capacity of the transregional interconnection of optimized evaluation Whether meet needs dilatation, provide technical support for interconnection increase-volume.

Accompanying drawing explanation

The optimization method flow chart that Fig. 1 provides for the present invention.

Detailed description of the invention

Below with reference to Figure of description, the technical scheme providing the present invention is done and is clearly introduced in detail.

The present invention relates to a kind of transregional interconnection transaction optimization method promoting clean energy resource to dissolve based on SCUC, the party Method can provide a kind of optimum transregional interconnection trading electricity, be uniformly coordinated consideration clean energy resource give, the load difference of receiving end, peak valley Difference, the complementarity of time difference, the selected interconnection electricity transaction scheme promoting clean energy resource maximum to dissolve and Unit Combination scheme.

Based on input and output region interacted system, take into full account the physics economical operation constraint of operation of power networks, and consider fire The constraint of group of motors minimum operational mode, the constraint of interconnection electricity transaction scheme, DC link run constraint, pass through security constraint Unit Combination method, optimization can promote the interconnection electricity transaction that clean energy resource is dissolved.

It is directed to China and needs to develop the urgent needs of clean energy resource, and China's electrical network present situation and clean energy resource are dissolved Contradiction, the angle configured on a large scale from resource, by optimizing transregional clean energy resource trading electricity, for different regions and difference electricity Source Type, makes full use of existing passway for transmitting electricity, innovates mode of doing business further, it is achieved the lean decision-making of transregional electricity transaction, By Market Approach, choose and promote clean energy resource reliably to dissolve, have the scheme of practice significance and prediction scheme.The present invention is transaction The lean of scheme is formulated and is provided technical support, efficiently solves the transregional trading electricity curve warp the most artificially of electrical network Test decision-making, it is impossible to consider the power supply load difference in input and output region problem with becoming more meticulous.

The optimization method that the present invention proposes, including:

One) set clean energy resource input area and output area, determine output, the electrical network of input area, unit and transregional The physics of interconnection, economic parameters；

Specify the direction of the transregional transaction of clean energy resource, the clearest and the most definite clean energy resource output area, input area and both it Between transregional DC link and other interconnections.

Clear and definite physics, economic parameters is needed to include:

(1) information of each unit in input and output region, including group name, installed capacity, machine set type, station service Rate, peak modulation capacity, whether thermal power plant unit, unit minimum load, climbing rate, landslide rate, minimum idle time, minimum when running Between；

(2) the recent power source planning information in input and output region, including adding new capacity, newly-increased installation type；

(3) the unit electricity price in input and output region or stake electrovalence；

(4) the cost of electricity-generating information of fired power generating unit, opens including micro-increasing cost curve, cold Qidong expense, temperature Qidong expense, heat Dynamic expense；

(5) the fired power generating unit minimum operational mode information in input and output region, including each power plant minimum start number of units, Minimum start capacity；

(6) system loading in input and output region and spinning reserve information；

(7) wind in input and output region, light prediction are exerted oneself；

(8) prediction of input and output region radial-flow type water power is exerted oneself, the generating electricity scope of storage capacity formula water power；

(9) Back ground Information of transprovincially/transregional interconnection, including interconnection title, power upper limit, lower limit；

(10) save between/interregional Transaction Information, including between province/interregional interconnection title, the transaction buyer, transaction sell Side, transaction composition, transaction value, transaction electricity, trading electricity；

(11) grid structure information in inside the province/region, the unit related to including section title, section limit value, this section, each Individual unit corresponding to the sensitivity coefficient of this section, each interconnection corresponding to the sensitivity coefficient of this section；

(12) the abandoning wind, abandon light, abandon water information of input area；Input area is the cost information of power purchase from district.

Two) according to demand, the transregional transaction forecasting edited method transprovincially of selection clean energy resource:

The peak interval of time of fixing interconnection electric power, optimizes peak valley ratio；The peak valley ratio of fixing interconnection electric power, optimizes peak The paddy period；Do not limit peak valley ratio, freely optimize；

Run and during transaction carries out in actual electric network, according to interconnection operating experience or the negotiation of purchasing, sell both sides As a result, the shape of DC link electric power is used restraint, such as: the peak interval of time of fixing interconnection electric power, optimize peak valley ratio； The peak valley ratio of fixing interconnection electric power, optimizes peak interval of time etc., and the mathematic(al) representation that above shape constraining is corresponding is:

1) peak interval of time of fixing interconnection electric power, optimizes peak valley ratio；

Low ebb ratio is shown with the relation such as following formula (1) of valley power:

P_tieD(i_tie)=R_D·P_Max(i_tie) (1)

Peak ratio is shown with the relation such as following formula (2) of peak power:

P_tieU(i_tie)=R_U·P_Max(i_tie) (2)

Peak ratio is more than or equal to shown in low ebb ratio such as following formula (3):

R_U＞=R_D (3)

Peak power is assigned to shown in the interconnection electric power such as following formula (4) of peak period:

P_tie(i_tie, t)=P_tieU(i_tie), wherein t meets I_sTieU(t)=1 (4)

Valley power is assigned to shown in the interconnection electric power such as following formula (5) of low-valley interval:

P_tie(i_tie, t)=P_tieD(i_tie), wherein t meets I_sTieU(t)=0 (5)

Wherein, P_tieD(i_tie) represent interconnection i_tieThe power value of low-valley interval, P_tieU(i_tie) represent interconnection i_tiePeak The power value of period, P_Max(i_tie) represent interconnection i_tieMaximum delivery capacity, R_DRepresent that valley power is defeated with interconnection maximum The ratio of power transmission power, R_URepresent the ratio of valley power and interconnection maximum delivery electric power, P_tie(i_tie, t) represent interconnection electricity Power, I_sTieUT ()=1 represents that this period t is in peak period, I_sTieUT ()=0 item represents the period at a low ebb this period t；

2) the peak valley ratio of fixing interconnection electric power, optimizes peak interval of time；

Fully optimized period for once low ebb uprises the moment at peak as shown in following formula (6):

$\underset{t}{\Σ}{U}_{startUp}(i_{tie},t)=1---\left(6\right)$

The moment of fully optimized period for once peak step-down paddy is as shown in following formula (7):

$\underset{t}{\Σ}{U}_{startDown}(i_{tie},t)=1---\left(7\right)$

Shown in relation such as following formula (8) between interconnection state and low ebb peak variable condition, peak and low valley variable condition:

$U_{tie}(i_{tie},t)=\underset{t_1}{\overset{t}{\Σ}}{U}_{startUp}(i_{tie},t_1)-\underset{t_1}{\overset{t}{\Σ}}{U}_{s\mathrm{ta}rtDown}(i_{tie},t_1)---\left(8\right)$

Shown in relation such as following formula (9) between interconnection electric power and interconnection state and peak valley ratio:

P_tie(i_tie, t)=U_tie(i_tie, t) P_TieMax(i_tie)·R_U(i_tie)+(1-U_tie(i_tie,t))·P_TieMax (i_tie)·R_D(i_tie) (9)

Wherein, U_startUp(i_tie,t)、U_startDown(i_tie, t) represent interconnection i respectively with 0 or 1_tieThe t period not from Low ebb is changed into the change on peak, interconnection i_tieIt is not changed into the change of low ebb from peak in the t period；R_UAnd R_DRepresent contact Low ebb, peak power ratio on line；U_tie(i_tie, t): if U_tie(i_tie, t)=1, represent interconnection i_tieIt is in peak in the t period Period；If U_tie(i_tie, t)=0, represent interconnection i_tieIn the period at a low ebb t period.

Three) it is modeled as sending by association system by transregional interconnection by clean energy resource output area, input area, sets up peace Staff cultivation Unit Combination model；

Give according to this, the actual electric network model of receiving end and the real physical characteristics of interconnection, it is considered to thermoelectricity minimum is run Mode retrains, the constraint of clean energy resource prediction-constraint, water power generated energy, DC link electric power shape constraining, input area abandon wind Abandon that light abandoning energy does not increase constraint, input area purchases strategies does not increase the practical constraints such as constraint and system balancing about Bundle, DC link run the basic constraint such as constraint, unit operation constraint, power system security constraints, with the cleaning of input/output terminal Energy consumption amount is target to the maximum, and the object of optimization is trading electricity and the Unit Commitment of input/output terminal of transregional interconnection With exert oneself；

Setting up to purchase based on input and output conjunctive model and sell defeated associating security constraint Unit Combination model, its object function is defeated The clean energy resource amount of dissolving going out region is maximum, and its expression formula is:

$\max CleanEnergy=\underset{i_{ce},t}{\Σ}{p}_i(i_{ce},t,b)\·T_{\mathrm{Pr}dMin}/60---\left(10\right)$

Wherein, i_ceRepresent clean energy resource unit；p_i(i_ce, t, b) represent the unit i of region b_ceExerting oneself of moment t, T_PrdMinIt is to represent the number of minutes that a time interval comprises.

(1) thermoelectricity minimum operational mode constraint:

Shown in the constraint such as following formula (11) of the minimum start number of units of region fired power generating unit::

$\underset{i_{tu}}{\Σ}{I}_{sGU}(i_{tu},g,b)\·U_i(i_{tu},t,b)>=N_{umMinOn}(g,b)---\left(11\right)$

Shown in the constraint such as following formula (12) of the minimum start capacity of region fired power generating unit:

$\underset{i_{tu}}{\Σ}{I}_{sGU}(i_{tu},g,b)\·P_i(i_{tu},t,b)>=C_{apMinOn}(g,b)---\left(12\right)$

Wherein, the minimum start number of units of the thermal motor group g of formula (11) expression region b is not less than N_umMinOn(g,b)；Formula (12) represent that the minimum start capacity of thermal motor group g of region b is not less than C_apMinOn(g,b)；I_sGU(i_tu, g, b) with 0 or 1 table Show: I_sGU(i_tu, g, b)=1 represents the unit i of region b_ceIn machine group g；U_i(i_tu, t, b) represent the unit i of region b_ce? The start and stop state of moment t；N_umMinOn(g b) represents the minimum start number of units of the machine group g of region b；C_apMinOn(g b) represents district The minimum start capacity of the machine group g of territory b.

(2) constraint of guarantee input area receiving wish:

1. input area abandons wind-powered electricity generation amount does not increase constraint, and input area is abandoned wind-powered electricity generation amount and is not more than the original pact abandoning wind-powered electricity generation amount Shown in bundle expression formula such as following formula (13):

Wherein, P_FW(t b) represents the input area b prediction wind-powered electricity generation electric power at moment t, P_i(i_wd, t, b) represent input area The Wind turbines i of b_wdExerting oneself when moment t, R_AWB () represents that region b's abandons wind ratio, S_etBrchbuyRepresent power purchase set of regions Close.

2. the purchases strategies taking in region does not increase constraint, the purchases strategies C of input area b_TBThe power purchase of (b) and region b Cost is not more than original purchases strategies C_BRetrain as shown in following formula (14),

Wherein, i_tieMeet I_sTieOp(i_tie)≠0；I_sTieOp(i_tie): represent with 0 or 1, I_sTieOp(i_tie)=1 item represents i_tieIt it is the interconnection variable optimized；C_i(i, t, b) the Wind turbines i of the expression region b cost of electricity-generating when moment t, S_i(i,t, B) the Wind turbines i of the expression region b start-up and shut-down costs when moment t, d_tie(i_tie, t, b) represent interconnection i_tieExist at moment t The direction of region b, 1 represents to be entered, and-1 expression is sent；Pr_tie(i_tie, t, b) represent interconnection i_tieAt moment t at the valency of region b Lattice；.(3) DC link runs and is constrained to:

1) shown in interconnection capacity such as following formula (15):

0≤P_tie(i_tie,t)≤P_TieMax(i_tie) (15)

Above formula constrains the power of interconnection in the range of its peak power limit value.

2) dominant eigenvalues rate of change constraint

P_tie(i_tie,t)-P_tie(i_tie,t-1)≤R_ampUp(i_tie,t)Δt (15)

P_tie(i_tie,t-1)-P_tie(i_tie,t)≤R_ampDown(i_tie,t)Δt (16)

Formula (15) (16) constrains the adjustment speed of adjacent time interval DC line not can exceed that the limit value of DC operation mode； R_ampUp(i_tie, t) represent interconnection i_tieClimbing rate at moment t；R_ampDown(i_tie, t) represent landslide rate；Δ t express time section Gap length.

3) interconnection continuous time power adjustment direction constraint

The increase and decrease of adjacent time interval can not be shown in incorgruous adjustment such as following formula (18) (19):

x⁺(i_tie,t)+x^-(i_tie,t+1)≤1 (17)

x⁺(i_tie,t+1)+x^-(i_tie,t)≤1 (18)

Dominant eigenvalues adjusts state x (i_tie, t) with power positive change, relation such as following formula (20) institute of inverse change Show:

x⁺(i_tie,t)+x^-(i_tie, t)=x (i_tie,t)≤1 (19)

The variation relation of dominant eigenvalues value gets up such as following formula (21) (22) with the variable association of positive change, direction change (23) shown in:

P_tie(i_tie,t)-P_tie(i_tie,t-1)≤M₁z₁(i_tie,t) (20)

P_tie(i_tie,t-1)-P_tie(i_tie,t)≤M₂z₂(i_tie,t) (21)

x⁺(i_tie,t)≥z₁(i_tie,t) (22)

Wherein, x (i_tie,t),x⁺(i_tie,t),x-(i_tie, t), all use 0 or 1 to represent that each period direct current is sent respectively Whether power changes, if positive change (increase power), if inverse change (reduction power)；z₁(i_tie, t) and z₂(i_tie, T) it is auxiliary variable, represents with 1 or 0；M₁And M₂For auxiliary on the occasion of parameter.

(4) interconnection direct current adjusts spacing constraint；

It is shown that dc power does at least even running one minimum interval such as following formula (24) after once adjusting:

$I_{sTieStart}(i_{tie},t)-\underset{\mathrm{\τ}=t+1}{\overset{t+N_T}{\Σ}}{I}_{sTieEnd}(i_{tie},\mathrm{\τ})\≤1---\left(23\right)$

Wherein, I_sTieStart(i_tie, t) and I_sTieEnd(i_tie, t) represent interconnection i respectively with 0 or 1_tieAt moment t whether Begin with power to adjust, whether terminate power adjustment；N_TFor DC line i_tieMinimum adjustment interval period number；y(i_tie, t) be Auxiliary variable, represents with 0 or 1；

I_sTieStart(i_tie,t)、I_sTieEnd(i_tie, t) with x (i_tie,t)、y(i_tie, t) between relation such as following formula (25)- (29) shown in:

I_sTieStart(i_tie,t)≥x(i_tie,t+1)-y(i_tie,t) (24)

I_sTieEnd(i_tie,t)≥x(i_tie,t)-y(i_tie,t) (25)

y(i_tie,t)≤x(i_tie,t) (26)

y(i_tie,t)≤x(i_tie,t+1) (27)

y(i_tie,t)≥x(i_tie,t)+x(i_tie,t+1)-1 (28)

Four) it is optimized calculating for input and output associating security constraint Unit Combination model.

Non-linear factor linearisation in model is expressed, uses Integer programming to calculate the electricity of transregional interconnection The Unit Commitment of power and input/output terminal and exerting oneself.

Above example is only in order to illustrate that technical scheme is not intended to limit, although with reference to above-described embodiment pair The present invention has been described in detail, and the detailed description of the invention of the present invention still can be entered by those of ordinary skill in the field Row amendment or equivalent, these are without departing from any amendment of spirit and scope of the invention or equivalent, all in application Within the claims of the present invention awaited the reply.

Claims (7)

1. a transregional interconnection transaction optimization method based on SCUC, it is characterised in that described optimization method includes:

(1) input, the parameter of output area are set；

(2) trans-regional electricity transaction forecasting edited method is selected；

(3) input and output associating security constraint Unit Combination model is built；

(4) seismic responses calculated.

2. optimization method as claimed in claim 1, it is characterised in that in described step (1),

(1-1) input area, output area and transregional DC link between the two and other interconnection are determined；

(1-2) input area and the electrical network of output area, unit and the physics of transregional interconnection and economic parameters are determined.

3. optimization method as claimed in claim 1, it is characterised in that described step (2) includes,

(2-1) determine the peak interval of time of interconnection electric power, optimize peak valley ratio as the following formula；

Shown in valley power such as following formula (1):

P_tieD(i_tie)=R_D*P_Max(i_tie) (1)

Shown in peak power such as following formula (2):

P_tieU(i_tie)=R_U*P_Max(i_tie) (2)

Wherein, peak ratio and low ebb proportionate relationship such as following formula (3) are shown:

R_U≥R_D (3)

In above formula, P_tieD(i_tie): interconnection i_tieThe power value of low-valley interval；P_tieU(i_tie): interconnection i_tieThe electricity of peak period Force value；P_Max(i_tie): interconnection i_tieMaximum delivery capacity；R_D: valley power and the ratio of interconnection maximum delivery electric power； R_U: peak power and the ratio of interconnection maximum delivery electric power；P_Max(i_tie): interconnection i_tieMaximum delivery capacity；

(2-2) determine the peak valley ratio of interconnection electric power, optimize peak interval of time as the following formula；

Fully optimized period for once low ebb uprises moment and the moment of a peak step-down paddy at peak；

Interconnection state U_tie(i_tie, t) as shown in following formula (4):

Interconnection electric power P_tie(i_tie, t) as shown in following formula (5):

P_tie(i_tie, t)=

U_tie(i_tie,t)*P_TieMax(i_tie)*R_U(i_tie)+(1-U_tie(i_tie,t))*P_TieMax(i_tie)*R_D(i_tie) (5)

Wherein, U_startUp(i_tie, t): interconnection i_tieThe change from low ebb to peak in the t period, represents with 0 or 1； U_startDown (i_tie, t): interconnection i_tieThe change from peak to low ebb in the t period, represents with 0 or 1；R_U(i_tie) and R_D(i_tie): table respectively Show low ebb and peak power ratio on interconnection；U_tie(i_tie, t): if U_tie(i_tie, t)=1, represent interconnection i_tieIn the t period It is in peak period；If U_tie(i_tie, t)=0, represent interconnection i_tieIn the period at a low ebb t period；P_TieMax(i_tie): contact Line i_tiePeak power limit value；

(2-3) do not limit peak valley ratio, freely optimize.

4. optimization method as claimed in claim 1, it is characterised in that in described step (3), combine including based on input and output What model was set up purchase, sell, defeated associating security constraint Unit Combination model；

Shown in the object function such as following formula (6) of described Unit Combination model:

Wherein, max CleanEnergy: the clean energy resource maximum amount of dissolving；i_ce: clean energy resource unit；p_i(i_ce, t, b): region b Unit i_ceExerting oneself of moment t；T_PrdMin: the time number to be divided into unit that a time interval comprises.

5. optimization method as claimed in claim 1, it is characterised in that described step (3) including:

(3-1) thermoelectricity minimum operational mode constraint；

Shown in minimum start number of units such as following formula (7) of region fired power generating unit:

∑_iceI_sGU(i_ce,g,b)*U_i(i_ce,t,b)≥N_umMinOn(g,b) (7)

Shown in minimum start capacity such as following formula (8) of region fired power generating unit:

∑_iceI_sGU(i_ce,g,b)*P_i(i_ce,t,b)≥C_apMinOn(g,b) (8)

In above formula, N_umMinOn(g, b): the minimum start number of units of the machine group g of region b；C_apMinOn(g, b): the machine group g of region b Minimum start capacity；I_sGU(i_ce, g, b): represent with 0 or 1, I_sGU(i_ce, g, b)=1 represents the unit i of region b_ceAt unit In group b；U_i(i_ce, t, b): the unit i of region b_ceStart and stop state at moment t；

(3-2) constraint of guarantee input area receiving wish:

Input area abandons wind-powered electricity generation amount not to be increased as shown in following formula (9):

∑_t(P_FW(t,b)-∑_iwdP_i(i_wd,t,b))≤∑_tP_FW(t,b)*R_AW(b), wherein b ∈ S_etBrchbuy (9)

Wherein, P_FW(t, b): input area b is at the prediction wind-powered electricity generation electric power of moment t；P_i(i_wd, t, b): the wind turbine of input area b Group i_wdExerting oneself of moment t；R_AW(b): region b abandons wind ratio；S_etBrchbuy: power purchase regional ensemble；

The purchases strategies C of input area_TBB () does not increase as shown in following formula (10):

Wherein, i_tieMeet I_sTieOp(i_tie)≠0；I_sTieOp(i_tie): represent with 0 or 1, I_sTieOp(i_tie)=1 item represents i_tieIt is The interconnection variable optimized；C_i(i, t, b): the Wind turbines i of the region b cost of electricity-generating when moment t；S_i(i, t b) represent district The Wind turbines i of the territory b start-up and shut-down costs when moment t；d_tie(i_tie, t, b): interconnection i_tieAt moment t in the direction of region b, d_tie(i_tie, t, b)=1 represents to be entered, d_tie(i_tie, t, b)=-1 represent and send；Pr_tie(i_tie, t, b) represent interconnection i_tie? Moment t is in the price of region b；C_B: original purchases strategies.

6. optimization method as claimed in claim 1, it is characterised in that in described step (3), DC link runs constraint bag Include:

Shown in i, interconnection capacity such as following formula (11):

0≤P_tie(i_tie,t)≤P_TieMax(i_tie) (11)

In formula, P_TieMax(i_tie): the peak power limit value of interconnection；

Ii, adjacent time interval DC line adjustment speed such as following formula (12) shown in:

In formula, R_ampUp(i_tie, t): interconnection i_tieCreep speed at moment t；R_ampDown(i_tie, t): interconnection i_tieIn the moment The landslide speed of t；The gap length of Δ t: time period；

Iii, the increase and decrease of interconnection adjacent time interval power can not incorgruous adjust；

Dominant eigenvalues adjusts state x (i_tie, t) as shown in following formula (13):

x⁺(i_tie,t)+x^-(i_tie, t)=x (i_tie,t)≤1 (13)

Shown in the change of dominant eigenvalues value such as following formula (14):

In above formula, x⁺(i_tie, t): each period direct current sends power whether positive change；x^-(i_tie, t): each period direct current send Go out power whether inverse change；z₁(i_tie, t) and z₂(i_tie, t) for the auxiliary variable represented with 0 or 1；M₁And M₂For auxiliary just Value parameter；

Shown in the interval such as following formula (15) that iv, interconnection direct current adjust:

Wherein, I_sTiestart: interconnection i_tieWhether start active power at moment t to adjust, represent with 0 or 1；

I_sTieEnd: interconnection i_tieWhether terminate active power at moment t to adjust, represent with 0 or 1；

Interconnection i_tieShown in the basis for estimation such as following formula (16) of moment t state:

In above formula, N_T: DC line i_tieMinimum adjustment interval period number；y(i_tie, t) for the auxiliary variable represented with 0 or 1.

7. optimization method as claimed in claim 1, it is characterised in that in described step (4), input and output described in linear expression Non-linear factor in associating security constraint Unit Combination model, and use Integer programming to calculate transregional interconnection The Unit Commitment of electric power and input/output terminal and exerting oneself.