CN103259260B - Connection plan compiling method used for meeting requirements for peak regulation - Google Patents

Abstract

The invention provides a connection plan compiling method used for meeting requirements for peak regulation. The connection plan compiling method comprises the following steps: 1, average power P<i, t><HB> and connection wire power P<i, t><ZE> undertaken by each company are calculated; 2, whole network load data are corrected; 3, planned power P<i, t><C> of protocol electric quantity is calculated; 4, planned output power of a main connection wire of each company is calculated. According to the connection plan compiling method used for meeting the requirements for the peak regulation, the planned output power of main connection wires meeting the requirements for the peak regulation is obtained finally, water and electricity peak regulation capacity of connection wires are fully used, and electric power resource allocation optimization capacity of regional interconnected networks is improved.

Description

A kind of contact planning device for meeting peak regulation demand

Technical field

The invention belongs to technical field of power dispatching automation, being specifically related to a kind of contact planning device for meeting peak regulation demand.

Background technology

In electric power system, the cooperation of electrical network brings very golden eggs to safe operation and economical operation.Can more reasonably allocate after system interconnect send out, power supply, wrong paddy of avoiding the peak hour, reduces the peak load of association system; More reasonably utilize all kinds of power resources such as water, fire, wind, thus obtain better total benefit.

The interconnection plan meeting peak regulation demand can make full use of the whole network resource, arranges the province having peak regulation nargin to alleviate the peak regulation pressure in the larger provinces of new forms of energy accounting such as wind-powered electricity generation, reaches the target making full use of the regenerative resources such as wind-powered electricity generation.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of contact planning device for meeting peak regulation demand, total interconnection plan that final acquisition meets peak regulation demand is exerted oneself, achieve the hydroelectric peak ability made full use of on interconnection, improve regional internet grid power most optimum distribution of resources ability.

In order to realize foregoing invention object, the present invention takes following technical scheme:

A kind of contact planning device for meeting peak regulation demand being provided, said method comprising the steps of:

Step 1: calculate the average power that each company bears and dominant eigenvalues

Step 2: the whole network load data is revised;

Step 3: calculate agreement electricity unscheduled power

Step 4: calculate the total interconnection plan of each company and exert oneself.

Described step 1 comprises the following steps:

Step 1-1: the interconnection average power calculating the t period according to region 1 and this survey region interconnection instantaneous power and according to allocation proportion calculate the average power that each company bears

Step 1-2: obtain region 2 and this survey region dominant eigenvalues, and according to allocation proportion calculate the dominant eigenvalues that each company bears

Described step 1-1 comprises the following steps:

Step 1-1-1: calculate trans-regional interconnection average power according to region 1 and this survey region interconnection instantaneous power

$P_t^{\mathrm{HB}}=(P_t^{\mathrm{HBS}}-P_{t-1}^{\mathrm{HBS}})/2---\left(1\right)$

Wherein, for the interconnection instantaneous power of t period, for the interconnection instantaneous power of t-1 period; Work as t=0, the t-1 period is last period of yesterday;

Step 1-1-2: according to allocation proportion calculate the average power that each company bears

$P_{i,t}^{\mathrm{HB}}=f_i^{\mathrm{HB}}{P}_t^{\mathrm{HB}}---\left(2\right)$

Wherein, allocation proportion meet: $\underset{i=1}{\overset{I}{\mathrm{\&Sigma;}}}{f}_i^{\mathrm{HB}}=1,$ And $0\&le;f_i^{\mathrm{HB}}\&le;1.$

In described step 1-2, the dominant eigenvalues that each company bears be expressed as:

$P_{i,t}^{\mathrm{ZE}}=f_i^{\mathrm{ZE}}{P}_t^{\mathrm{ZE}}---\left(3\right)$

Wherein, allocation proportion meet $\underset{i=1}{\overset{I}{\mathrm{\&Sigma;}}}{f}_i^{\mathrm{ZE}}=1,$ And $0\&le;f_i^{\mathrm{ZE}}\&le;1.$

In described step 2, according to creep speed, the whole network load data is revised as follows, make the system of each company interconnection gained divide water power plan point thermoelectricity plan superposition of exerting oneself of exerting oneself and unite to meet the requirement of interconnection plan fluctuating range;

$\mathrm{\&Delta;}\stackrel{\&OverBar;}{P_D}<P_{D,t}-P_{D,t-1}<\mathrm{\&Delta;}\underset{\&OverBar;}{P_D}---\left(4\right)$

Wherein, for the maximum fall off rate of interconnection plan; Δ p _d for the maximum climbing speed of interconnection plan, P _d,tfor t period the whole network load, P _{d, t-1}for t-1 period the whole network load goes out force value.

In described step 3, suppose that i-th company has Y _iindividual agreement item, the plan of each agreement item is i represents that agreement electricity unscheduled power occurs to be sent by company's number; The then agreement electricity unscheduled power of the said firm for:

$P_{i,t}^C=\underset{y=1}{\overset{Y_i}{\mathrm{\&Sigma;}}}{P}_{i,y,t}^C---\left(5\right).$

Described step 4 comprises the following steps:

Step 4-1: calculate the system point water power plan of each company and exert oneself, comprise a system point water power power transmission plan and exert oneself exert oneself with the system point powered plan of water power

Step 4-2: according to the whole network load of t period after water power peak clipping calculate the system point thermoelectricity plan of each company to exert oneself

Step 4-3: calculate the total interconnection plan of each company and exert oneself

In described step 4-1, the whole network water power power transmission electricity and the whole network water power meet following equilibrium constraint by power consumption:

$\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{Q}_n^S+\underset{m=1}{\overset{M}{\mathrm{\&Sigma;}}}{Q}_m^S=0---\left(6\right)$

Wherein, N represents water power powered company number, and n ∈ N; M represents water power power transmission company number, and m ∈ M; represent the system of each powered company divide water power day electricity, and represent the system of each power transmission company divide water power day electricity, and

Described step 4-1 comprises the following steps:

Step 4-1-1: calculate the whole network water power power transmission electricity

$Q_{\mathrm{Total}}^S=\underset{m=1}{\overset{M}{\mathrm{\&Sigma;}}}{Q}_m^S---\left(7\right)$

Step 4-1-2: carry out water power peak clipping by the whole network load curve formed the whole network load data, by the whole network water power power transmission quantity division to each period of whole day;

In the Mathematical Modeling of water power peak clipping, objective function F is expressed as

$F=\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{\&Integral;}_{P_{D,t}-P_t^S}^{P_{D,t}}\mathrm{xdx}---\left(8\right)$

And have:

$P_{\min }^S\&le;P_t^S\&le;P_{\max }^S---\left(9\right)$

$\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P}_t^S=4\&CenterDot;Q_{\mathrm{Total}}^S---\left(10\right)$

Wherein, T represents whole day period total number, represent that the water power of the arrangement of t period sends power, represent the water power minimum power because frequency modulation needs, represent that water power day part can arrange maximum power;

Water power peak clipping adopts Lagrangian Relaxation Algorithm, and LagrangianL is expressed as:

$L=F-\mathrm{\&lambda;}(\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P}_t^S-4\&CenterDot;Q_{\mathrm{Total}}^S)---\left(11\right)$

Wherein, λ is the Lagrangian factor;

Make LagrangianL obtain extreme value by the maximum obtaining objective function F, the necessary condition that objective function F obtains maximum is:

$\left\{\begin{array}{c}\frac{\&PartialD;L}{{\&PartialD;P}_t^S}=0\\ \frac{\&PartialD;L}{\&PartialD;\mathrm{\&lambda;}}=0\end{array}\right.---\left(12\right)$

Substitute into LagrangianL expression formula and get final product:

$\left\{\begin{array}{c}\frac{\&PartialD;L}{{\&PartialD;P}_t^S}=-P_t^S+(P_{D,t}-\mathrm{\&lambda;})=0\\ \frac{\&PartialD;L}{\&PartialD;\mathrm{\&lambda;}}=\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P}_t^S-4Q_{\mathrm{Total}}^S=0\end{array}\right.---\left(13\right)$

Through type (13) can calculate and λ, by what calculate the maximum that formula (11) can obtain objective function F is substituted into λ.

Step 4-1-3: calculate a system point water power power transmission plan and exert oneself exert oneself with the system point powered plan of water power

A system point water power power transmission plan is exerted oneself be expressed as:

$P_{m,t}^S=P_t^S\&times;(Q_m^S/\underset{m=1}{\overset{M}{\mathrm{\&Sigma;}}}|Q_m^S\left|\right)---\left(14\right)$

The system point powered plan of water power is exerted oneself be expressed as:

$P_{n,t}^S=P_t^S\&times;(Q_n^S/\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}|Q_n^S\left|\right)---\left(15\right).$

Described step 4-2 comprises the following steps:

Step 4-2-1: the whole network load of t period after the peak clipping of calculating water power be expressed as:

$P_{D,t}^H=P_{D,t}-P_t^S---\left(16\right)$

Step 4-2-2: calculate the system point thermoelectricity plan of each company and exert oneself

Suppose that current system divides thermoelectricity to have X sorting item, the day electricity of each sorting item of each company is for each sorting item, keep sending the principle balanced as follows:

$\underset{i=1}{\overset{I}{\mathrm{\&Sigma;}}}{Q}_{i,x}^H=0,x=\mathrm{1,2},\&CenterDot;\&CenterDot;\&CenterDot;,X---\left(17\right)$

The whole network load of the ratio between day of system point thermoelectricity Plan Curve day part power after power energy allocation and t period after water power peak clipping formed after water power peak clipping the t period the whole network load curve day part between ratio identical, therefore, the system point thermoelectricity plan of each company is exerted oneself be expressed as:

$P_{i,x,t}^H=Q_{i,x}^H\&times;(P_{D,t}^H/\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P}_{D,t}^H)---\left(18\right)$

And have:

$\underset{i=1}{\overset{I}{\mathrm{\&Sigma;}}}{P}_{i,x,t}^H=\underset{i=1}{\overset{I}{\mathrm{\&Sigma;}}}{Q}_{i,x}^H\&times;(P_{D,t}^H/\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P}_{D,t}^H)=0---\left(19\right).$

In described step 4-3, the total interconnection plan of each company is exerted oneself be expressed as:

$P_{i,t}^{\mathrm{LLX}}=P_t^S+P_{i,x,t}^H+P_{i,t}^{\mathrm{HB}}+P_{i,t}^{\mathrm{ZE}}+P_{i,t}^C---\left(20\right).$

Compared with prior art, beneficial effect of the present invention is:

1. the present invention is when working out interconnection plan, the water power clipping algorithm adopted takes full advantage of the peak modulation capacity of the adjustable water power in interconnection, more reasonably allotment is sent out, is powered, to avoid the peak hour wrong paddy, reducing the peak load of association system, improving the actual reserve capacity level of each system when not increasing equipment;

2. alleviate peak regulation pressure, realize the target making full use of the regenerative resources such as wind-powered electricity generation;

3. in the present invention, can effectively meet peak regulation demand for the interconnection planning algorithm meeting peak regulation demand, thermoelectricity is exerted oneself as far as possible smooth requirement, fully excavate the peak modulation capacity of interconnection in electrical network, also be large regions networking, solve peak regulation demand under the overall background of new forms of energy access and provide strategy;

4. the interconnection planning device that the present invention adopts is classified to all kinds of interconnection, can try to achieve effective executable interconnection plan;

5. system point thermoelectricity is with the whole network load curve after peak clipping for reference, and the fired power generating unit that ensure that on interconnection is exerted oneself as far as possible mild requirement, realizes the energy-saving and cost-reducing target of fired power generating unit.

Accompanying drawing explanation

Fig. 1 is the contact planning device flow chart for meeting peak regulation demand;

Fig. 2 is the contact planning device embodiment schematic diagram for meeting peak regulation demand.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail.

The present invention with certain region actual electric network for rely on.The main following Some features of this regional power grid:

Different from traditional understanding, region zones is not necessarily pressed in control area, and the main foundation divided is property right.In this regional power grid, control divisions is divided into four.Wherein, load mainly this east, region of company 1, power supply mainly comprises the north in this region, east and middle part at present; The load of other three companies load then mainly in this administrative region, each thermoelectricity generating set of power supply also mainly in this administrative region and some other unit.In this regional power grid, power supply and power load distributing are very unbalanced.Define east, western electric power to middle part conveying, the northern electric power situation of carrying to south.With regard to controlled area, send in powered general layout at this regional power grid, company 1 and company 2 are main feeding sections, and company 3 is main powered regions.

Its general principle of the present invention is as follows:

First, with the whole network load curve for benchmark, adopt clipping algorithm, divide water power power energy allocation to each period systems all in system, form the water power Plan Curve of system, thus the system forming each company divides water power whole day to send powered curve.Then, with the whole network load curve after water power peak clipping for benchmark, according to the proportionate relationship of load power between this curve day part, give each period each company system point thermoelectricity power energy allocation, thus the system forming each company divides thermoelectricity whole day to send by curve.Finally, superposition agreement electric power, trans-regional interconnection, just define whole day total interconnection exchange plan curve of each company.

Object of the invention process is to provide a kind of interconnection planning device, fully excavates the peak modulation capacity of regional power grid, fully receives the new forms of energy such as wind-powered electricity generation, meet current peak regulation demand under the prerequisite ensureing power grid security.

Sending of each company should meet following requirement by power planning:

(1) water power should be arranged in peak period as far as possible.

(2) maximum electric energy is provided in the period that the whole network load is the highest by power transmission company.

(3) the interconnection plan of same period of all companies should meet power and send by balance principle.

(4) each company send and should meet actual safety and stability constraints by power planning.

For solving the problems of the technologies described above, the invention provides a kind of contact planning device for meeting peak regulation demand, as Fig. 1, comprising the following steps:

Step 1: calculate the average power that each company bears and dominant eigenvalues ;

Step 2: the whole network load data is revised;

Step 3: calculate agreement electricity unscheduled power ;

Step 4: calculate the total interconnection plan of each company and exert oneself.

In the present invention, interconnection planning algorithm is the interconnection plan power curve calculating one day future, is a logic period with 15 minutes, and calculating duration is 24 hours, so within one day, have 96 periods.With study of various interconnection in dispatching cycle for research object, optimize all kinds of interconnection power curve, make full use of the whole network resource, arrange have the province of peak regulation nargin to alleviate the peak regulation pressure in the larger province of wind-powered electricity generation accounting, reach the target making full use of wind-powered electricity generation regenerative resource.

Described step 1 comprises the following steps:

Step 1-1: the interconnection average power calculating the t period according to region 1 and this survey region interconnection instantaneous power and according to allocation proportion calculate the average power that each company bears

Step 1-2: obtain region 2 and this survey region dominant eigenvalues, and according to allocation proportion calculate the dominant eigenvalues that each company bears

Described step 1-1 comprises the following steps:

Step 1-1-1: calculate trans-regional interconnection average power according to region 1 and this survey region interconnection instantaneous power

$P_t^{\mathrm{HB}}=(P_t^{\mathrm{HBS}}-P_{t-1}^{\mathrm{HBS}})/2---\left(1\right)$

Wherein, for the interconnection instantaneous power of t period, for the interconnection instantaneous power of t-1 period; From formula (1), the interconnection average power of t period for the interconnection instantaneous power of t period with the interconnection instantaneous power of t-1 period mean value; Work as t=0, the t-1 period is last period of yesterday.

Step 1-1-2: according to allocation proportion calculate the average power that each company bears

$P_{i,t}^{\mathrm{HB}}=f_i^{\mathrm{HB}}{P}_t^{\mathrm{HB}}---\left(2\right)$

Wherein, allocation proportion meet: $\underset{i=1}{\overset{I}{\mathrm{\&Sigma;}}}{f}_i^{\mathrm{HB}}=1,$ And $0\&le;f_i^{\mathrm{HB}}\&le;1.$

In described step 1-2, the dominant eigenvalues that each company bears be expressed as:

$P_{i,t}^{\mathrm{ZE}}=f_i^{\mathrm{ZE}}{P}_t^{\mathrm{ZE}}---\left(3\right)$

Wherein, allocation proportion meet $\underset{i=1}{\overset{I}{\mathrm{\&Sigma;}}}{f}_i^{\mathrm{ZE}}=1,$ And $0\&le;f_i^{\mathrm{ZE}}\&le;1.$

Because the interconnection project impact of each company is to the formulation of the daily trading planning of each power transmission company and powered company, therefore, ensure that interconnection plan meets ramping rate constraints, to ensure feasibility when each company formulates generation schedule.

From the above mentioned, the power fluctuation amplitude of interconnection plan can not exceed the power fluctuation amplitude of the whole network load curve.Actual motion shows, assume responsibility for all load fluctuations when the excessive reason of the power fluctuation amplitude of interconnection plan is often water power peak clipping.Therefore, before calculating interconnection unscheduled power, in step 2 of the present invention, according to creep speed, the whole network load data is revised as follows, make the system of each company interconnection gained divide water power plan point thermoelectricity plan superposition of exerting oneself of exerting oneself and unite to meet the requirement of interconnection plan fluctuating range;

$\mathrm{\&Delta;}\stackrel{\&OverBar;}{P_D}<P_{D,t}-P_{D,t-1}<\mathrm{\&Delta;}\underset{\&OverBar;}{P_D}---\left(4\right)$

Wherein, for the maximum fall off rate of interconnection plan; Δ p _d for the maximum climbing speed of interconnection plan, P _d,tfor t period the whole network load, P _{d, t-1}for t-1 period the whole network load goes out force value.

In described step 3, suppose that i-th company has Y _iindividual agreement item, the plan of each agreement item is i represents that agreement electricity unscheduled power occurs to be sent by company's number; The then agreement electricity unscheduled power of the said firm for:

$P_{i,t}^C=\underset{y=1}{\overset{Y_i}{\mathrm{\&Sigma;}}}{P}_{i,y,t}^C---\left(5\right).$

Described step 4 comprises the following steps:

Step 4-1: calculate the system point water power plan of each company and exert oneself, comprise a system point water power power transmission plan and exert oneself exert oneself with the system point powered plan of water power

Step 4-2: according to the whole network load of t period after water power peak clipping calculate the system point thermoelectricity plan of each company to exert oneself

Step 4-3: calculate the total interconnection plan of each company and exert oneself

In step 4-1, system point water power day quantity division:

First, water power electricity is divided to superpose the system that each for the whole network water power sends company, and with the whole network typical day load curve for benchmark, according to the principle of the whole network load curve being carried out to peak clipping, on the basis considering system frequency modulation, water power quantity division is divided to be whole day total water power power planning president.Then, in each period, send the water power electricity proportionate relationship between company according to each water power, give each power transmission company total water power Power Decomposition of this period, the water power plan forming each power transmission company is exerted oneself.Due in each period, water power send by always keeping balance, therefore, divides the water power electricity proportionate relationship of the powered company of water power according to each system, and give each powered company total water power Power Decomposition of this period, the water power plan just defining each powered company is exerted oneself.

The whole network water power power transmission electricity and the whole network water power meet following equilibrium constraint by power consumption:

$\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{Q}_n^S+\underset{m=1}{\overset{M}{\mathrm{\&Sigma;}}}{Q}_m^S=0---\left(6\right)$

Wherein, N represents water power powered company number, and n ∈ N; M represents water power power transmission company number, and m ∈ M; represent the system of each powered company divide water power day electricity, and represent the system of each power transmission company divide water power day electricity, and

Described step 4-1 comprises the following steps:

Step 4-1-1: calculate the whole network water power power transmission electricity

$Q_{\mathrm{Total}}^S=\underset{m=1}{\overset{M}{\mathrm{\&Sigma;}}}{Q}_m^S---\left(7\right)$

Step 4-1-2: carry out water power peak clipping by the whole network load curve formed the whole network load data, by the whole network water power power transmission quantity division to each period of whole day;

In the Mathematical Modeling of water power peak clipping, objective function F is expressed as

$F=\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{\&Integral;}_{P_{D,t}-P_t^S}^{P_{D,t}}\mathrm{xdx}---\left(8\right)$

And have:

$P_{\min }^S\&le;P_t^S\&le;P_{\max }^S---\left(9\right)$

$\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P}_t^S=4\&CenterDot;Q_{\mathrm{Total}}^S---\left(10\right)$

Wherein, T represents whole day period total number, represent that the water power of the arrangement of t period sends power, represent the water power minimum power because frequency modulation needs, represent that water power day part can arrange maximum power;

Water power peak clipping adopts Lagrangian Relaxation Algorithm, and LagrangianL is expressed as:

$L=F-\mathrm{\&lambda;}(\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P}_t^S-4\&CenterDot;Q_{\mathrm{Total}}^S)---\left(11\right)$

Wherein, λ is the Lagrangian factor;

Make LagrangianL obtain extreme value by the maximum obtaining objective function F, the necessary condition that objective function F obtains maximum is:

$\left\{\begin{array}{c}\frac{\&PartialD;L}{{\&PartialD;P}_t^S}=0\\ \frac{\&PartialD;L}{\&PartialD;\mathrm{\&lambda;}}=0\end{array}\right.---\left(12\right)$

Substitute into LagrangianL expression formula and get final product:

$\left\{\begin{array}{c}\frac{\&PartialD;L}{{\&PartialD;P}_t^S}=-P_t^S+(P_{D,t}-\mathrm{\&lambda;})=0\\ \frac{\&PartialD;L}{\&PartialD;\mathrm{\&lambda;}}=\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P}_t^S-4Q_{\mathrm{Total}}^S=0\end{array}\right.---\left(13\right)$

Through type (13) can calculate and λ, by what calculate the maximum that formula (11) can obtain objective function F is substituted into λ.

Step 4-1-3: calculate a system point water power power transmission plan and exert oneself exert oneself with the system point powered plan of water power

A system point water power power transmission plan is exerted oneself be expressed as:

$P_{m,t}^S=P_t^S\&times;(Q_m^S/\underset{m=1}{\overset{M}{\mathrm{\&Sigma;}}}|Q_m^S\left|\right)---\left(14\right)$

The system point powered plan of water power is exerted oneself be expressed as:

$P_{n,t}^S=P_t^S\&times;(Q_n^S/\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}|Q_n^S\left|\right)---\left(15\right).$

In described step 4-2 the decomposition of system point thermoelectricity day electricity with the load curve after water power peak clipping for benchmark, each company is all according to the proportionate relationship between this curve day part load, divide thermoelectricity day quantity division to each period the system of respective company, thus the system forming each company divide thermoelectricity whole day Plan Curve.

Step 4-2 comprises the following steps:

Step 4-2-1: the whole network load of t period after the peak clipping of calculating water power be expressed as:

$P_{D,t}^H=P_{D,t}-P_t^S---\left(16\right)$

Step 4-2-2: calculate the system point thermoelectricity plan of each company and exert oneself

Suppose that current system divides thermoelectricity to have X sorting item, the day electricity of each sorting item of each company is for each sorting item, keep sending the principle balanced as follows:

$\underset{i=1}{\overset{I}{\mathrm{\&Sigma;}}}{Q}_{i,x}^H=0,x=\mathrm{1,2},\&CenterDot;\&CenterDot;\&CenterDot;,X---\left(17\right)$

The whole network load of the ratio between day of system point thermoelectricity Plan Curve day part power after power energy allocation and t period after water power peak clipping formed after water power peak clipping the t period the whole network load curve day part between ratio identical, therefore, the system point thermoelectricity plan of each company is exerted oneself be expressed as:

$P_{i,x,t}^H=Q_{i,x}^H\&times;(P_{D,t}^H/\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P}_{D,t}^H)---\left(18\right)$

And have:

$\underset{i=1}{\overset{I}{\mathrm{\&Sigma;}}}{P}_{i,x,t}^H=\underset{i=1}{\overset{I}{\mathrm{\&Sigma;}}}{Q}_{i,x}^H\&times;(P_{D,t}^H/\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P}_{D,t}^H)=0---\left(19\right).$

In described step 4-3, the total interconnection plan of each company is exerted oneself be expressed as:

$P_{i,t}^{\mathrm{LLX}}=P_t^S+P_{i,x,t}^H+P_{i,t}^{\mathrm{HB}}+P_{i,t}^{\mathrm{ZE}}+P_{i,t}^C---\left(20\right).$

For making the object, technical solutions and advantages of the present invention clearly, be described in further detail below in conjunction with accompanying drawing 2 and embodiments of the present invention.

As shown in Figure 2, process is as follows for interconnection planning master data flow process:

(1) all kinds of load data is obtained from storehouse, strange land;

(2) obtain the instantaneous plan of trans-regional 1 interconnection from local library, trans-regional 1 total interconnection plan, agreement electric quantity data, required system divide water power electric quantity data and required system to divide thermoelectricity electric quantity data;

(3) exert oneself according to the interconnection plan of above data zoning 1, region 2 interconnection plan, agreement electricity unscheduled power, an a system point water power plan point thermoelectricity plan of exerting oneself and unite;

(4) total interconnection plan is sent in storehouse, strange land and local library;

(5) from reading the Northeast, storehouse, strange land load, read unit master data from local library, then calculate primary section information according to total interconnection plan.

In certain electrical network example that the present invention adopts, in interconnection, Hydropower Unit capacity is large, and change of exerting oneself is fast, and fired power generating unit efficiency when exerting oneself with low uncertainty is high, and the effect that the inventive method realizes is described as follows:

After water power peak clipping, in the low ebb moment, basically identical before the whole network load and peak clipping, the difference of existence is the requirement meeting frequency modulation.After peak clipping, the peak-valley difference of the whole network load reduces, and achieves the target of peak regulation, and the whole network load curve shape after thermoelectricity curve and peak clipping is basically identical, more gently, for the establishment of fired power generating unit plan successfully provides guarantee.

This method is the interconnection planning device research for meeting peak regulation demand carried out under actual electric network data.This method, by all kinds of interconnection planning solution lotus root, adopts clipping algorithm to system point water power, makes full use of the adjustability of water power, make the thermoelectricity in interconnection bear base lotus, ensure the target of fired power generating unit safe operation.Fully excavate the peak modulation capacity of interconnection in electrical network, be also large regions networking, solve peak regulation demand under the overall background of new forms of energy access and provide a kind of method.

This method, by interconnection planning optimization, draws the intraday plan of exerting oneself of all kinds of interconnection, gives full play to the peak modulation capacity of region Nei Ge company, alleviates the peak regulation pressure of the company that peak modulation capacity is little in region, improves total economic benefit of interconnected systems.

Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.

Claims (10)

1., for meeting a contact planning device for peak regulation demand, it is characterized in that: said method comprising the steps of:

Step 1: calculate the average power that each company bears and dominant eigenvalues

Step 2: the whole network load data is revised;

Step 3: calculate agreement electricity unscheduled power

Step 4: calculate the total interconnection plan of each company and exert oneself;

Described step 1 comprises the following steps:

Step 1 ?1: the interconnection average power calculating the t period according to region 1 and this survey region interconnection instantaneous power and according to the first allocation proportion f _i ^hBcalculate the average power that each company bears

Step 1 ?2: obtain region 2 and this survey region dominant eigenvalues, and according to the second allocation proportion f _i ^zEcalculate the dominant eigenvalues that each company bears

2. the contact planning device for meeting peak regulation demand according to claim 1, is characterized in that: described step 1 ?1 to comprise the following steps:

Step 1 ?1 ?1: the interconnection average power P calculating the t period according to region 1 and this survey region interconnection instantaneous power _t ^hB;

${P_t}^{\mathrm{HB}}=({P_t}^{\mathrm{HBS}}-P_{t-1}^{\mathrm{HBS}})/2---\left(1\right)$

Wherein, P _t ^hBSfor the interconnection instantaneous power of t period, for t ?the interconnection instantaneous power of 1 period; Work as t=0, t ?1 period be last period of yesterday;

Step 1 ?1 ?2: according to allocation proportion f _i ^hBcalculate the average power that each company bears

$P_{i,t}^{\mathrm{HB}}={f_i}^{\mathrm{HB}}{P_t}^{\mathrm{HB}}---\left(2\right)$

Wherein, allocation proportion f _i ^hBmeet: and 0≤f _i ^hB≤ 1.

3. the contact planning device for meeting peak regulation demand according to claim 1, is characterized in that: described step 1 ?in 2, the dominant eigenvalues that each company bears be expressed as:

$P_{i,t}^{\mathrm{ZE}}={f_i}^{\mathrm{ZE}}{P_t}^{\mathrm{ZE}}---\left(3\right)$

Wherein, allocation proportion f _i ^zEmeet and 0≤f _i ^zE≤ 1.

4. the contact planning device for meeting peak regulation demand according to claim 1, it is characterized in that: in described step 2, according to creep speed, the whole network load data is revised as follows, make the system of each company interconnection gained divide water power plan point thermoelectricity plan superposition of exerting oneself of exerting oneself and unite to meet the requirement of interconnection plan fluctuating range;

$\mathrm{\&Delta;}{\stackrel{\&OverBar;}{P}}_D<P_{D,t}-P_{D,t-1}<\mathrm{\&Delta;}\underset{\&OverBar;}{P_D}---\left(4\right)$

Wherein, for the maximum fall off rate of interconnection plan; for the maximum climbing speed of interconnection plan, P _d,tfor t period the whole network load, P _{d, t-1}for t ?1 period the whole network load goes out force value.

5. the contact planning device for meeting peak regulation demand according to claim 1, is characterized in that: in described step 3, supposes that i-th company has Y _iindividual agreement item, the plan of each agreement item is (y ∈ Y _iand 0≤y≤I, i ∈ I), I represents that agreement electricity unscheduled power occurs to be sent by company's number; The then agreement electricity unscheduled power of the said firm for:

$P_{i,t}^C=\underset{y=1}{\overset{Y_i}{\mathrm{\&Sigma;}}}{P}_{i,y,t}^C---\left(5\right).$

6. the contact planning device for meeting peak regulation demand according to claim 1, is characterized in that: described step 4 comprises the following steps:

Step 4 ?1: calculate the system point water power plan of each company and exert oneself, comprising a system point water power power transmission plan and exerting oneself exert oneself with the system point powered plan of water power

Step 4 ?2: according to the whole network load of t period after water power peak clipping calculate the system point thermoelectricity plan of each company to exert oneself

Step 4 ?3: calculate the total interconnection plan of each company and exert oneself

7. the contact planning device for meeting peak regulation demand according to claim 6, it is characterized in that: in described step 4 ?1, the whole network water power power transmission electricity and the whole network water power meet following equilibrium constraint by power consumption:

$\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{Q}_n^S+\underset{m=1}{\overset{M}{\mathrm{\&Sigma;}}}{Q}_m^S=0---\left(6\right)$

Wherein, N represents water power powered company number, and n ∈ N; M represents water power power transmission company number, and m ∈ M; represent the system of each powered company divide water power day electricity, and represent the system of each power transmission company divide water power day electricity, and

8. the contact planning device for meeting peak regulation demand according to claim 7, is characterized in that: described step 4 ?1 to comprise the following steps:

Step 4 ?1 ?1: calculate the whole network water power power transmission electricity

$Q_{\mathrm{Total}}^S=\underset{m=1}{\overset{M}{\mathrm{\&Sigma;}}}{Q}_m^S---\left(7\right)$

Step 4 ?1 ?2: carry out water power peak clipping by the whole network load curve formed the whole network load data, by the whole network water power power transmission quantity division to each period of whole day;

In the Mathematical Modeling of water power peak clipping, objective function F is expressed as

$F=\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{\&Integral;}_{P_{D,t}-{P_t}^S}^{P_{D,t}}\mathrm{xdx}---\left(8\right)$

And have:

$P_{\min }^S\&le;{P_t}^S\&le;P_{\max }^S---\left(9\right)$

$\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P_t}^S=4\&CenterDot;Q_{\mathrm{Total}}^S---\left(10\right)$

Wherein, T represents whole day period total number, P _t ^srepresent that the water power of the arrangement of t period sends power, represent the water power minimum power because frequency modulation needs, represent that water power day part can arrange maximum power;

Water power peak clipping adopts Lagrangian Relaxation Algorithm, and LagrangianL is expressed as:

$L=F-\mathrm{\&lambda;}(\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P_t}^S-4\&CenterDot;Q_{\mathrm{Total}}^S)---\left(11\right)$

Wherein, λ is the Lagrangian factor;

Make LagrangianL obtain extreme value by the maximum obtaining objective function F, the necessary condition that objective function F obtains maximum is:

$\left\{\begin{array}{c}\frac{\&PartialD;L}{\&PartialD;{P_t}^S}=0\\ \frac{\&PartialD;L}{\&PartialD;\mathrm{\&lambda;}}=0\end{array}\right.---\left(12\right)$

Substitute into LagrangianL expression formula and get final product:

$\left\{\begin{array}{c}\frac{\&PartialD;L}{\&PartialD;{P_t}^S}=-{P_t}^S+(P_{D,t}-\mathrm{\&lambda;})=0\\ \frac{\&PartialD;L}{\&PartialD;\mathrm{\&lambda;}}=\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P_t}^S-4Q_{\mathrm{Total}}^S=0\end{array}\right.---\left(13\right)$

Through type (13) can calculate P _t ^sand λ, by the P calculated _t ^sthe maximum that formula (11) can obtain objective function F is substituted into λ;

Step 4 ?1 ?3: calculate a system point water power power transmission plan and exert oneself exert oneself with the system point powered plan of water power

A system point water power power transmission plan is exerted oneself be expressed as:

$P_{m,t}^S={P_t}^S\&times;(Q_m^S/\underset{m=1}{\overset{M}{\mathrm{\&Sigma;}}}|Q_m^S\left|\right)---\left(14\right)$

The system point powered plan of water power is exerted oneself be expressed as:

$P_{n,t}^S={P_t}^S\&times;(Q_n^S/\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}|Q_n^S\left|\right)---\left(15\right).$

9. the contact planning device for meeting peak regulation demand according to claim 6, is characterized in that: described step 4 ?2 to comprise the following steps:

Step 4 ?2 ?1: the whole network load calculating the t period after water power peak clipping be expressed as:

$P_{D,t}^H=P_{D,t}-{P_t}^S---\left(16\right)$

Step 4 ?2 ?2: calculate the system point thermoelectricity plan of each company and exert oneself

Suppose that current system divides thermoelectricity to have X sorting item, the day electricity of each sorting item of each company is (i ∈ I, x ∈ X); For each sorting item, keep sending the principle balanced as follows:

$\underset{i=1}{\overset{I}{\mathrm{\&Sigma;}}}{Q}_{i,x}^H=0,x=\mathrm{1,2},\&CenterDot;\&CenterDot;\&CenterDot;,X---\left(17\right)$

The whole network load of the ratio between day of system point thermoelectricity Plan Curve day part power after power energy allocation and t period after water power peak clipping formed after water power peak clipping the t period the whole network load curve day part between ratio identical, therefore, the system point thermoelectricity plan of each company is exerted oneself be expressed as:

$P_{i,x,t}^H=Q_{i,x}^H\&times;(P_{D,t}^H/\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P}_{D,t}^H)---\left(18\right)$

And have:

$\underset{i=1}{\overset{I}{\mathrm{\&Sigma;}}}{P}_{i,x,t}^H=\underset{i=1}{\overset{I}{\mathrm{\&Sigma;}}}{Q}_{i,x}^H\&times;(P_{D,t}^H/\underset{t=1}{\overset{T}{\mathrm{\&Sigma;}}}{P}_{D,t}^H)=0---\left(19\right).$

10. the contact planning device for meeting peak regulation demand according to claim 6, is characterized in that: described step 4 ?in 3, the total interconnection plan of each company is exerted oneself be expressed as:

$P_{i,t}^{\mathrm{LLX}}={P_t}^S+P_{i,x,t}^H+P_{i,t}^{\mathrm{HB}}+P_{i,t}^{\mathrm{ZE}}+P_{i,t}^C---\left(20\right).$