CN103972913A - Pumped-storage plant daily operation mode optimization method based on marginal electricity generation energy consumption - Google Patents

Abstract

The invention discloses a pumped-storage plant daily operation mode optimization method based on marginal electricity generation energy consumption. A set load priority sequence is determined according to unit electricity generation energy consumption of thermal power generating sets, the working positions and generated output of all thermal power stations are optimized on the basis of the load priority sequence, system peak load regulation needs and operation restriction of a pumped-storage plant are taken into consideration to optimize the forced water pumping power energy volume and the corresponding forced generated output of a pumped-storage plant, water pumping storage capacity restriction is calculated, The daily operation mode of the pumped-storage plant is optimized on the basis of the marginal electricity generation energy consumption, and daily operation mode optimization schemes of the pumped-storage plant are obtained. The daily operation mode of the pumped-storage plant can be determined rapidly according to the unit electricity generation energy consumption of all the thermal power generating sets, the total electricity generation energy consumption of a system is lowered extremely, and the method has high stability and repeatability and has project practicability.

Description

A kind of pump-up power station day operation mode optimization method based on limit generating energy consumption

Technical field

The invention belongs to hydroenergy storage station running technology field, more specifically, relate to a kind of pump-up power station day operation mode optimization method based on limit generating energy consumption.

Background technology

Pump-up power station is as current on the largest scaleization of electric power system, the most reliable, most economical, life cycle is long, capacity is large, technology is the most ripe energy storage device, obtained that increasingly extensive research is paid attention to and development is fast built.Pump-up power station is comprised of upper storage reservoir, lower storage reservoir and pumping water to generate electricity unit, its basic functional principle is at network load low-valley interval, pumping water to generate electricity machine is with the electric energy of motor-operation absorption system surplus, driving the hydraulic turbine from lower storage reservoir, to be drawn into upper storage reservoir as pump handle water, is that water can be stored by electric energy conversion; In network load peak period, the water of storage can be generated electricity by water wheels machine driving generator, be electrical network transmission of electric energy, thereby realize a large amount of valley electricities to the conversion of peak power.Pump-up power station has multiple on-road efficiency, can utilize system peak-valley difference to play the effect of peak-clipping and valley-filling, and with its fast, start and stop characteristic flexibly born the important technology functions such as frequency modulation, phase modulation, emergency duty and black startup in system, to guaranteeing that power system safety and stability economical operation, energy saving of system reduce discharging and the aspect such as power balance has important function.

In order rationally to utilize, give full play to the peak-clipping and valley-filling function of pump-up power station, make electric power system reach on the whole good performance driving economy and energy-saving and emission-reduction benefit, need to formulate pump-up power station peaking operation optimization principles and optimisation strategy, determine the concrete operational mode of pump-up power station under different situations, draw unit optimizing operating mode scheme a few days ago.

The angle reducing discharging from energy saving of system, consider that the pump-up power station energy consumption of drawing water equals to supply with it and draws water and other fired power generating unit generating energy consumption of increasing, when the energy consumption of drawing water of pump-up power station, to be less than other unit generation energy that its generating substituted consuming time, thinks that the operation of pump-up power station is economy, environmental protection and meets peaking operation optimization principles.

The formulating method of traditional pump-up power station day operation mode prioritization scheme is identical with conventional Thermal and Hydroelectric Power Systems economic dispatch method, be to take certain economic index as target function by setting up and solving, with system restriction and power station, be constrained to that the peaking operation Optimized model of constraints realizes.Yet, compare with conventional hydropower station economic dispatch model, pump-up power station peaking operation Optimized model complexity is higher, require subsystems to coordinate self benefit and entire system benefit, and need the constraints of consideration more, there is the features such as extensive, non-linear, high dimension, non-convexity and discreteness, and current optimization routine algorithm and intelligent search algorithm all often can only obtain unsettled locally optimal solution, are difficult to obtain theoretical optimal solution.Therefore, research possesses the pump-up power station day operation mode optimization method that the consideration pumped storage peaking operation optimization principles of engineering practicability and energy saving of system reduce discharging service requirement and has great importance.

Summary of the invention

Above defect or Improvement requirement for prior art, the invention provides a kind of pump-up power station day operation mode optimization method based on limit generating energy consumption, can determine fast the day operation mode of pump-up power station according to each fired power generating unit unit's generating energy consumption, reduce to the utmost the system energy consumption of always generating electricity, there is very strong stability and repeatability, have more engineering practicability.

For achieving the above object, the invention provides a kind of pump-up power station day operation mode optimization method, it is characterized in that, comprise that thermal power station's operation is optimized, pump-up power station is forced to draw water, and operation is optimized and the optimization of pump-up power station energy-saving run; Wherein,

The operation optimization of described thermal power station comprises the steps:

(1) obtain system and predict daily load curve a few days ago;

(2) service position and the generated output on daily load curve predicted in other type power station outside optimization system Zhong Chu thermal power station, pump-up power station a few days ago, obtains the day net load curve that Xu You thermal power station and pump-up power station are born service position;

(3) according to the maximum of predicting daily load curve a few days ago, determine reserve capacity for load variation in power and accident spinning reserve capacity, from the required start capacity of system, deduct the exert oneself start capacity in other type power station outside Ji Chu thermal power station, pump-up power station of pump-up power station maximum generation, actual required thermoelectricity start capacity in the cycle that is optimized;

(4) according to each fired power generating unit unit's generating energy consumption, carry out the preferential tagmeme sequence of fired power generating unit load, according to the preferential tagmeme of fired power generating unit load and fired power generating unit start capacity requirement, consider the constraint of each thermal power station and thermal power unit operation, the best start capacity of Optimized Operation cycle Nei Ge thermal power station and technology thereof exert oneself part and variable service position and generated output of exerting oneself partly on day net load curve;

Described pump-up power station is forced to draw water to move to optimize and is comprised the steps:

(5) judgement system net load low-valley interval peak regulation situation, if be greater than the minimum value of system day net load in the minimum technology force outlet part minute sum of open state fired power generating unit, illustrative system thermoelectricity peak modulation capacity is not enough, should force pumped storage unit to draw water and fill out paddy, execution step (6); Otherwise execution step (8);

(6) consider the constraint of pump-up power station pumping water to generate electricity capacity of power unit, make the pump-up power station pumping water to generate electricity unit of net load low-valley interval force to draw water, and revise corresponding period load and fired power generating unit service position;

(7) make system net load peak load period pump-up power station pumping water to generate electricity unit generation, until utilized pump-up power station to force the water energy that draws water saved;

The optimization of described pump-up power station energy-saving run comprises the steps:

(8) initialization remains the storage capacity E that draws water _pS(0), the period set T that draws water _p(0), j=1;

(9) calculate the fired power generating unit generating energy consumption C that pumped storage unit of day part draws water required _{Δ P}(t), get the period t that replaces energy consumption index minimum _o(j), by period t _o(j) add the period set of drawing water;

(10) fired power generating unit of search peak load position on other period net load curve drawing water period set, determines that pump-up power station draws water electric weight size for pumped storage capacity of power unit C _ptime pump-up power station generating alternative fired power generating unit generated output, calculate the generating energy consumption sum C that alternative fired power generating unit generated output is corresponding _{Σ Δ T};

(11) judge whether to carry out the energy-saving run optimization of pump-up power station, if meet constraints, arrange pump-up power station at period t _o(j) draw water, will be corresponding to the electric weight size of drawing water for pumped storage capacity of power unit C _pfired power generating unit generated output replace with pump-up power station generated output, revise the service position of net load curve and fired power generating unit, E _pS(j)=E _pS(j-1)-C _p, j=j+1, returns to step (9); Otherwise the day operation mode that cannot further optimize pump-up power station is described, does not carry out energy-saving run optimization, the period set of drawing water is modified to T _p(j)=T _p(j-1), execution step (12);

(12) arrange the day part generated output of each fired power generating unit and output pump-up power station day part draw water electric power or generated output, the day operation mode that completes pump-up power station is optimized.

Preferably, described step (6) further comprises the steps:

(6-1) determine and need pumped storage unit to force the period set T drawing water _vL;

(6-2) according to fired power generating unit exert oneself lower limit and net load curve, consider the constraint of pump-up power station pumping water to generate electricity capacity of power unit, calculate pump-up power station and force to draw water electric weight E _pFfor:

$E_{\mathrm{PF}}=\underset{t\∈T_{\mathrm{VL}}}{\mathrm{\Σ}}{C}_P\·\mathrm{ceil}\left(\frac{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{P}_{i.\min }-D_N\left(t\right)}{C_P}\right)$

Wherein, ceil is the function that rounds up, P _i.minfor the minimum technology of the i platform fired power generating unit in the open state part of exerting oneself, n is the total number of units of the fired power generating unit in open state, D _n(t) be the net load size of t period;

(6-3) revise on net load curve net load size and the fired power generating unit service position of forcing to draw water period set corresponding to pumped storage unit.

Preferably, described step (7) further comprises the steps:

(7-1) pressure that initialization has utilized the electric weight E that draws water _uPF(0) be 0, k=1;

(7-2) carry out forcing for the k time the drawing water utilization of electric weight, the fired power generating unit i of search peak load position on other period net load curve that pumped storage unit is forced to draw water period set _f(k), obtain pump-up power station generated output P _pF(t _f(k) be):

$P_{\mathrm{PF}}\left(t_F\left(k\right)\right)=\min \{P_{i_F}\left(t_F\left(k\right)\right),\mathrm{\η}(E_{\mathrm{PF}}-E_{\mathrm{UPF}}(k-1))\}$

Wherein, for net load peak load period t _f(k) fired power generating unit i _f(k) generated output, η is the pumped storage unit conversion efficiency of drawing water-generate electricity, E _pFfor pump-up power station forces to draw water electric weight;

(7-3) according to pumped storage unit, force generated output P _pF(t _f(k)) revise net load curve and fired power generating unit i _f(k) service position, E _uPF(k)=E _uPF(k-1)+P _pF(t _f(k))/η;

If (7-4) E _uPF(k) equal pump-up power station and force to draw water electric weight E _pF, illustrate that the electric weight of forcing to draw water has utilized, execution step (8), otherwise make k=k+1, return to step (7-2).

Preferably, in described step (9), when there is the period of a plurality of replacement energy consumption index minimums, choose the minimum period of wherein loading, and this period is added to the period set of drawing water.

Preferably, in described step (11), described constraints is:

$\left\{\begin{array}{c}{E}_{\mathrm{PS}}(j-1)-C_P>0\\ C_{\mathrm{\&Delta;P}}\left(t_O\left(j\right)\right)<C_{\mathrm{\&Sigma;\&Delta;T}}\end{array}\right..$

In general, the above technical scheme of conceiving by the present invention compared with prior art, has following beneficial effect:

1, according to each fired power generating unit unit generating energy optimization each thermal power station service position and generated output, consider on this basis all kinds of operation constraints, determine that the limit that day part pump-up power station draws water substitutes energy consumption, take and meet energy-conservation requirement as the day operation mode of condition iteration optimization pump-up power station, reduce to the utmost total generating energy consumption of system.

2, can meet the peak regulation demand of system, also the various operation constraints of thermal power station and pump-up power station have been considered, with respect to the traditional pump-up power station peaking operation Optimized model that can consider same Complex Constraints, optimization method of the present invention is realized by deterministic process optimization mode, avoided conventional model to adopt intelligent search algorithm to solve brought randomness, there is very strong stability and repeatability, have more engineering practicability.

Accompanying drawing explanation

Fig. 1 is the pump-up power station day operation mode optimization method flow chart based on limit generating energy consumption of the embodiment of the present invention.

Embodiment

In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.In addition,, in each execution mode of described the present invention, involved technical characterictic just can not combine mutually as long as do not form each other conflict.

The present invention determines the preferential tagmeme of unit load according to fired power generating unit unit's generating energy consumption, service position and generated output based on each thermal power station of load precedence bit optimization, the pressure of taking into account system peak regulation demand and pump-up power station operation constrained optimization pump-up power station draw water quantity of electricity and the corresponding generated output of forcing, and take into account draw water storage capacity constraint of pump-up power station, based on limit generating energy consumption, pump-up power station day operation mode is carried out to energy saving optimizing, obtain the day operation mode prioritization scheme of pump-up power station.

As shown in Figure 1, the pump-up power station day operation mode optimization method based on limit generating energy consumption of the embodiment of the present invention comprises that thermal power station's operation is optimized, pump-up power station is forced to draw water, and operation is optimized and the optimization of pump-up power station energy-saving run.

Wherein, the unit generating energy consumption that thermal power station operation optimization makes on system net load curve day part bear the fired power generating unit of service position increases from down to up gradually, specifically comprises the steps:

(1) obtain system and predict all types of unit parameters in daily load curve and system a few days ago.

(2) service position and the generated output on daily load curve predicted in other type power station outside optimization system Zhong Chu thermal power station, pump-up power station a few days ago, to predict that daily load curve, by the generated output summation in other type power station outside a hour deduction thermal power station, pump-up power station, obtains the day net load curve that Xu You thermal power station and pump-up power station are born service position a few days ago.

(3) according to the maximum of predicting daily load curve a few days ago, determine reserve capacity for load variation in power and accident spinning reserve capacity, the start capacity in other the type power station of deduction except thermal power station, pump-up power station from the required start capacity of system, interior required thermoelectricity start of the cycle that is optimized capacity, consider that pump-up power station can bear emergency duty, in start capacity, deduct pump-up power station maximum generation and exert oneself, the required thermoelectricity start capacity of reality in the cycle that is optimized.

(4) according to each fired power generating unit unit's generating energy consumption, carry out the preferential tagmeme sequence of fired power generating unit load, according to the preferential tagmeme of fired power generating unit load and fired power generating unit start capacity requirement, consider each thermal power station and thermal power unit operation constraint (as the bound constraint etc. of exerting oneself of minimum start constraint, the fired power generating unit of thermal power station), the best start capacity of Optimized Operation cycle Nei Ge thermal power station and technology thereof exert oneself part and variable service position and generated output of exerting oneself partly on day net load curve.

Step (4) further comprises the steps:

(4-1) according to each fired power generating unit unit's generating energy consumption, carry out the preferential tagmeme sequence of fired power generating unit load, according to the preferential tagmeme of fired power generating unit load, in conjunction with fired power generating unit start capacity requirement, determine each thermal power station's start capacity.

(4-2) arrange each thermal power station's minimum technology part of exerting oneself to bear base load, determine each thermal power station's minimum technology exert oneself service position and the generated output of part, and judge whether accordingly to occur the situation of thermoelectricity peak regulation deficiency.

(4-3) according to the preferential tagmeme of fired power generating unit load, take into account each thermal power station's generated output upper limit, arrange successively from top to bottom the variable service position of part on day net load curve of exerting oneself of each thermal power station.

Pump-up power station is forced to draw water to move to optimize and is specifically comprised the steps:

(5) judgement system net load low-valley interval peak regulation situation, if be greater than the minimum value of system day net load, in the minimum technology force outlet part minute sum of open state fired power generating unit illustrative system thermoelectricity peak modulation capacity is not enough, should force pumped storage unit to draw water and fill out paddy, execution step (6), otherwise execution step (8).

Wherein, P _i.minfor the minimum technology of the i platform fired power generating unit in the open state part of exerting oneself, n is the total number of units of the fired power generating unit in open state, D _n(t) be the net load size of t period.

(6) consider the constraint of pump-up power station pumping water to generate electricity capacity of power unit, make the pump-up power station pumping water to generate electricity unit of net load low-valley interval force to draw water and revise corresponding period load and fired power generating unit service position.

Step (6) further comprises the steps:

(6-1) determine and need pumped storage unit to force the period set T drawing water _vL.

(6-2) according to fired power generating unit exert oneself lower limit and net load curve, consider the constraint of pump-up power station pumping water to generate electricity capacity of power unit, calculate pump-up power station and force to draw water electric weight E _pF, computational methods are:

$E_{\mathrm{PF}}=\underset{t\&Element;T_{\mathrm{VL}}}{\mathrm{\&Sigma;}}{C}_P\&CenterDot;\mathrm{ceil}\left(\frac{\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{P}_{i.\min }-D_N\left(t\right)}{C_P}\right)$

Wherein, C _pfor pumped storage capacity of power unit, ceil is the function that rounds up, P _i.minfor the minimum technology of the i platform fired power generating unit in the open state part of exerting oneself, n is the total number of units of the fired power generating unit in open state, D _n(t) be the net load size of t period.

(6-3) revise on net load curve net load size and the fired power generating unit service position of forcing to draw water period set corresponding to pumped storage unit.

(7) take energy-saving and emission-reduction as optimization aim, embody the volume replacement benefit of pump-up power station, make system net load peak load period pump-up power station pumping water to generate electricity unit generation, until utilized pump-up power station to force the water energy that draws water saved.

Step (7) further comprises the steps:

(7-1) pressure that initialization has utilized the electric weight E that draws water _uPF(0) be 0, k=1.

(7-2) carry out forcing for the k time the drawing water utilization of electric weight, the fired power generating unit i of search peak load position on other period net load curve that pumped storage unit is forced to draw water period set _f(k), by fired power generating unit i _f(k) at peak load period t _f(k) partly or entirely exert oneself replaces with pump-up power station generated output P _pF(t _f(k)):

$P_{\mathrm{PF}}\left(t_F\left(k\right)\right)=\min \{P_{i_F}\left(t_F\left(k\right)\right),\mathrm{\&eta;}(E_{\mathrm{PF}}-E_{\mathrm{UPF}}(k-1))\}$

Wherein, for net load peak load period t now _f(k) fired power generating unit i _f(k) generated output, η is the pumped storage unit conversion efficiency of drawing water-generate electricity, E _pFfor pump-up power station forces to draw water electric weight.

(7-3) according to pumped storage unit, force generated output P _pF(t _f(k)) revise net load curve and fired power generating unit i _f(k) service position, upgrade according to the following formula the pressure the utilized electric weight that draws water:

E _UPF(k)＝E _UPF(k-1)+P _PF(t _F(k))/η

(7-4) judge whether the electric weight of forcing to draw water is finished, the electric weight E if the pressure having utilized is drawn water _uPF(k) equal pump-up power station and force to draw water electric weight E _pF, illustrate that the electric weight of forcing to draw water has utilized, execution step (8), otherwise make k=k+1, return to step (7-2).

The optimization of pump-up power station energy-saving run specifically comprises the steps:

(8) initialization remains the storage capacity E that draws water _pS(0)=E _pV-E _pF, period set T draws water _p(0)=T _vL, j=1, wherein, E _pVfor the pump-up power station day maximum storage capacity that draws water.

(9) calculate the fired power generating unit generating energy consumption C that pumped storage unit of day part draws water required _{Δ P}(t), get the period t that replaces energy consumption index minimum _o(j), by period t _o(j) add the period set of drawing water, the period set that is about to draw water is preset as T _p(j)={ T _p(j-1) ∪ t _o(j) }.

Preferably, when there is the period of a plurality of replacement energy consumption index minimums, the prediction of considering low-valley interval is loaded when higher and may be caused system to occur the situation of peak regulation deficiency, thus choose the minimum period of wherein loading, and this period is added to the period set of drawing water.

(10) search is except the period set T that draws water _p(j) fired power generating unit of peak load position on other outer period net load curve, determines that pump-up power station draws water electric weight size for pumped storage capacity of power unit C _ptime pump-up power station generating alternative fired power generating unit generated output (this iterative calculation method and step (7) are similar), calculate the generating energy consumption sum C that alternative fired power generating unit generated output is corresponding _{Σ Δ T}.

(11) judge whether to carry out the energy-saving run optimization of pump-up power station, if meet following constraints:

$\left\{\begin{array}{c}{E}_{\mathrm{PS}}(j-1)-C_P>0\\ C_{\mathrm{\&Delta;P}}\left(t_O\left(j\right)\right)<C_{\mathrm{\&Sigma;\&Delta;T}}\end{array}\right.$

Arrange pump-up power station at period t _o(j) draw water, will be corresponding to the electric weight size of drawing water for pumped storage capacity of power unit C _pfired power generating unit generated output replace with pump-up power station generated output, revise the service position of net load curve and fired power generating unit, upgrade as follows each variable and return to step (9):

$\left\{\begin{array}{c}{E}_{\mathrm{PS}}\left(j\right)=E_{\mathrm{PS}}(j-1)-C_P\\ j=j+1\end{array}\right.$

Wherein, E _pS(j-1) be residue after the j-1 time iteration storage capacity that draws water, C _{Δ P}(t _o(j)) be period t _o(j) a fired power generating unit generating energy consumption that pumped storage unit draws water required.

Otherwise the day operation mode that cannot further optimize pump-up power station is described, does not carry out energy-saving run optimization, the period set of drawing water is modified to T _p(j)=T _p(j-1), execution step (12).

(12) arrange the day part generated output of each fired power generating unit and output pump-up power station day part draw water electric power or generated output, the day operation mode that completes pump-up power station is optimized.

Pass through said method, can take into account under the prerequisite of all kinds of operation constraints of thermal power station and pump-up power station, formulate fast pump-up power station day operation mode prioritization scheme, meet systematic electricity balance, electric quantity balancing and the requirement of peak regulation balance, realize energy-saving power generation operation, reduce to the utmost overall system operation generating energy consumption.

Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.

Claims (5)

1. a pump-up power station day operation mode optimization method, is characterized in that, comprises that thermal power station's operation is optimized, pump-up power station is forced to draw water, and operation is optimized and the optimization of pump-up power station energy-saving run; Wherein,

The operation optimization of described thermal power station comprises the steps:

(1) obtain system and predict daily load curve a few days ago;

(2) service position and the generated output on daily load curve predicted in other type power station outside optimization system Zhong Chu thermal power station, pump-up power station a few days ago, obtains the day net load curve that Xu You thermal power station and pump-up power station are born service position;

(3) according to the maximum of predicting daily load curve a few days ago, determine reserve capacity for load variation in power and accident spinning reserve capacity, from the required start capacity of system, deduct the exert oneself start capacity in other type power station outside Ji Chu thermal power station, pump-up power station of pump-up power station maximum generation, actual required thermoelectricity start capacity in the cycle that is optimized;

(4) according to each fired power generating unit unit's generating energy consumption, carry out the preferential tagmeme sequence of fired power generating unit load, according to the preferential tagmeme of fired power generating unit load and fired power generating unit start capacity requirement, consider the constraint of each thermal power station and thermal power unit operation, the best start capacity of Optimized Operation cycle Nei Ge thermal power station and technology thereof exert oneself part and variable service position and generated output of exerting oneself partly on day net load curve;

Described pump-up power station is forced to draw water to move to optimize and is comprised the steps:

(5) judgement system net load low-valley interval peak regulation situation, if be greater than the minimum value of system day net load in the minimum technology force outlet part minute sum of open state fired power generating unit, illustrative system thermoelectricity peak modulation capacity is not enough, should force pumped storage unit to draw water and fill out paddy, execution step (6); Otherwise execution step (8);

(6) consider the constraint of pump-up power station pumping water to generate electricity capacity of power unit, make the pump-up power station pumping water to generate electricity unit of net load low-valley interval force to draw water, and revise corresponding period load and fired power generating unit service position;

(7) make system net load peak load period pump-up power station pumping water to generate electricity unit generation, until utilized pump-up power station to force the water energy that draws water saved;

The optimization of described pump-up power station energy-saving run comprises the steps:

(8) initialization remains the storage capacity E that draws water _pS(0), the period set T that draws water _p(0), j=1;

(9) calculate the fired power generating unit generating energy consumption C that pumped storage unit of day part draws water required _{Δ P}(t), get the period t that replaces energy consumption index minimum _o(j), by period t _o(j) add the period set of drawing water;

(10) fired power generating unit of search peak load position on other period net load curve drawing water period set, determines that pump-up power station draws water electric weight size for pumped storage capacity of power unit C _ptime pump-up power station generating alternative fired power generating unit generated output, calculate the generating energy consumption sum C that alternative fired power generating unit generated output is corresponding _{Σ Δ T};

(11) judge whether to carry out the energy-saving run optimization of pump-up power station, if meet constraints, arrange pump-up power station at period t _o(j) draw water, will be corresponding to the electric weight size of drawing water for pumped storage capacity of power unit C _pfired power generating unit generated output replace with pump-up power station generated output, revise the service position of net load curve and fired power generating unit, E _pS(j)=E _pS(j-1)-C _p, j=j+1, returns to step (9); Otherwise the day operation mode that cannot further optimize pump-up power station is described, does not carry out energy-saving run optimization, the period set of drawing water is modified to T _p(j)=T _p(j-1), execution step (12);

(12) arrange the day part generated output of each fired power generating unit and output pump-up power station day part draw water electric power or generated output, the day operation mode that completes pump-up power station is optimized.

2. pump-up power station day operation mode optimization method as claimed in claim 1, is characterized in that, described step (6) further comprises the steps:

(6-1) determine and need pumped storage unit to force the period set T drawing water _vL;

(6-2) according to fired power generating unit exert oneself lower limit and net load curve, consider the constraint of pump-up power station pumping water to generate electricity capacity of power unit, calculate pump-up power station and force to draw water electric weight E _pFfor:

$E_{\mathrm{PF}}=\underset{t\&Element;T_{\mathrm{VL}}}{\mathrm{\&Sigma;}}{C}_P\&CenterDot;\mathrm{ceil}\left(\frac{\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{P}_{i.\min }-D_N\left(t\right)}{C_P}\right)$

Wherein, ceil is the function that rounds up, P _i.minfor the minimum technology of the i platform fired power generating unit in the open state part of exerting oneself, n is the total number of units of the fired power generating unit in open state, D _n(t) be the net load size of t period;

(6-3) revise on net load curve net load size and the fired power generating unit service position of forcing to draw water period set corresponding to pumped storage unit.

3. pump-up power station day operation mode optimization method as claimed in claim 1 or 2, is characterized in that, described step (7) further comprises the steps:

(7-1) pressure that initialization has utilized the electric weight E that draws water _uPF(0) be 0, k=1;

(7-2) carry out forcing for the k time the drawing water utilization of electric weight, the fired power generating unit i of search peak load position on other period net load curve that pumped storage unit is forced to draw water period set _f(k), obtain pump-up power station generated output P _pF(t _f(k) be):

$P_{\mathrm{PF}}\left(t_F\left(k\right)\right)=\min \{P_{i_F}\left(t_F\left(k\right)\right),\mathrm{\&eta;}(E_{\mathrm{PF}}-E_{\mathrm{UPF}}(k-1))\}$

Wherein, for net load peak load period t _f(k) fired power generating unit i _f(k) generated output, η is the pumped storage unit conversion efficiency of drawing water-generate electricity, E _pFfor pump-up power station forces to draw water electric weight;

(7-3) according to pumped storage unit, force generated output P _pF(t _f(k)) revise net load curve and fired power generating unit i _f(k) service position, E _uPF(k)=E _uPF(k-1)+P _pF(t _f(k))/η;

If (7-4) E _uPF(k) equal pump-up power station and force to draw water electric weight E _pF, illustrate that the electric weight of forcing to draw water has utilized, execution step (8), otherwise make k=k+1, return to step (7-2).

4. pump-up power station day operation mode optimization method as claimed any one in claims 1 to 3, it is characterized in that, in described step (9), when there is the period of a plurality of replacement energy consumption index minimums, choose the minimum period of wherein loading, and this period is added to the period set of drawing water.

5. pump-up power station day operation mode optimization method as claimed in claim 1, is characterized in that, in described step (11), described constraints is:

$\left\{\begin{array}{c}{E}_{\mathrm{PS}}(j-1)-C_P>0\\ C_{\mathrm{\&Delta;P}}\left(t_O\left(j\right)\right)<C_{\mathrm{\&Sigma;\&Delta;T}}\end{array}\right..$