CN101577425B - Optimal load allocating system - Google Patents

Abstract

The invention provides an operating schedule with lowest fuel cost. The operating schedule consumes the lowest fuel cost, and comprises fewest number of input parameters which are obtained by off-linecalculation and are established based on output allocation of the lowest fuel cost among a plurality of units. The optimal load allocating system is used for managing the optimal load allocation of t otal output of power generating equipment consisting of a plurality of units in the plurality of the units, and comprises a data input part 1, an optimal load allocation input file 2, an optimal load allocating calculation part 3, an optimal load allocating output file 4, an optimal load allocating mode display part 5 and an optimal load allocating and scheduling display part 6, wherein the data input part 1 is used for inputting the equipment specification of each unit required by the optimal load allocation; the optimal load allocation input file 2 stores data input by the data input part; the optimal allocating calculation part 3 carries out optimal allocating calculation based on data stored in the optimal load allocating calculation file; and the optimal load allocating output file 4 stores the calculation result executed by the optimal allocating calculation part 3. The optimal load allocating mode display part 5 displays the following contents: a sending end characteristic curveof each unit; a fuel cost curve of each unit; a curve of a load optimally allocated to each unit, which is relative to the total output; a fuel cost curve of the total output; and a fuel cost curve u sed for comparing optimal load allocation and conventional load allocation based on data stored in the optimal load allocating output file and the load allocating input file. The optimal load allocating and scheduling display part 6 displays a power transmission time scheduling table, a power transmission time scheduling curve and a fuel cost comparative table of different operating modes.

Description

Optimal load allocating system

Technical field

The present invention relates to the optimal load allocating system in a kind of generating equipment.Especially, relate in the situation that consider fuel cost, the system of realization optimal load allocating.

Background technology

Usually, generating equipment is composed of multiple units, and according to the operation planning that is determined each unit by the specified total output of distribution substation.According to prior art, between these unit, distribute load to depend on operator's experience in the mode that realizes total output, and the electric power transfer cost is always not minimum.

In recent years, electricity market is established, and Utilities Electric Co. is required operation improving efficient.Therefore, need to help by this way between each unit to distribute the feature of load, so that by the through-put power cost minimization of the specified gross power of distribution substation.

Japanese Patent Laid-Open NO.2000-78750 discloses a kind of thought of optimized operation.But, according to this thought, based on the sensor information from physical device, carry out in real time optimization computation, and for each unit real-time operation sub-controller of generating equipment, with energy savings and raise the efficiency.

Summary of the invention

Yet the sometimes foundation of optimal model is too complicated, to such an extent as to can not set input parameter, and optimized operation can not be used.

The present invention forms under the circumstances, and the purpose of this invention is to provide the operation scheduling table, this operation scheduling: minimize fuel cost; The input parameter that comprises minimum number; Obtain through computed offline; And be to consider that the output that minimizes fuel cost between a plurality of unit distributes and formulates.

In order to achieve this end, the invention provides a kind of optimal load allocating system, it is used for managing total output of the generating equipment that is composed of multiple units in the optimal load allocating of described a plurality of unit, comprise: data input device, it is used for the specification of equipment of each required unit of input optimal load allocating; The optimal load allocating input file, its storage is via the data of described data input device input; The optimal load allocating calculation element, it is carried out optimal load allocating and calculates based on the data that are stored in the described optimal load allocating input file; The optimal load allocating output file, its storage is by the result of the performed described calculating of described optimal load allocating calculation element; The optimal load allocating mode display unit, it shows below content: the transmitting terminal characteristic curve of each unit, the fuel cost curve of each unit, optimally be assigned to the load of each unit with respect to the curve of described total output, the fuel cost curve of described total output, and be used for relatively based on the described optimal load allocating of the data that are stored in described optimal load allocating output file and described optimal load allocating input file and the fuel cost curve of conventional load distribution; And optimal load allocating scheduling display unit, it shows the fuel cost comparison sheet of electric power transfer time scheduling table, electric power transfer time scheduling curve and different operation modes, and

A kind of optimal load allocating method, it is used for managing total output of the generating equipment that is composed of multiple units in the optimal load allocating of described a plurality of unit, comprising: the specification of equipment of each unit that the input optimal load allocating is required and storage input data; Carry out the result that this calculating was calculated and stored to optimal load allocating based on described data; Show below content: the transmitting terminal characteristic curve of each in described a plurality of unit, the fuel cost curve of each in described a plurality of unit, optimally be assigned to each load in described a plurality of unit with respect to the curve of described total output, the fuel cost curve of described total output, and be used for the fuel cost curve that comparison distributes based on the result's of described data and described calculating described optimal load allocating and conventional load; And the fuel cost comparison sheet that shows electric power transfer time scheduling table, electric power transfer time scheduling curve and different operation modes.

According to the present invention, because input consists of the specification of equipment of each equipment of generating equipment, can come the load between the described unit of computational minimization fuel cost to distribute for the specified total output of distribution substation, and can distribute to operate generating equipment based on described load by this way, so that fuel cost minimizes.

Description of drawings

Fig. 1 is the calcspar that the configuration of the embodiment of the invention 1 is shown;

Fig. 2 A illustrates fuel cost how along with the performance diagram of the rate of change of total output T of P1 and generating equipment;

Fig. 2 B be illustrate according to embodiments of the invention 2, in the situation that the diagram that the exemplary optimal load allocating that generating equipment is comprised of three or more unit is calculated;

Fig. 3 A is fuel cost curve and the characteristic performance diagram of power transmission efficiency that illustrates according to each unit of the generating equipment of the embodiment of the invention 3;

Fig. 3 B optimization is shown distributes to the load of each unit with respect to the curve of total output of generating equipment and the performance diagram of total fuel cost curve of exporting;

Fig. 3 C is the performance diagram that the fuel cost curve that tradition (equalization) load distribution and optimal load allocating are compared is shown;

Fig. 4 A illustrates the load allocation schedule table that is used for minimizing fuel cost according to the embodiment of the invention 4;

Fig. 4 B is the diagram that the overall transmission power output scheduling curve of expectation is shown;

Fig. 4 C is the diagram that the through-put power output scheduling curve of each unit is shown;

Fig. 4 D is the diagram that the overall transmission power output scheduling of whole equipment is shown;

Fig. 4 E is the diagram that is illustrated in the curve in the situation of considering loading rate;

Fig. 4 F is illustrated in the dispatch list in the situation of inputting impossible desired value;

Fig. 4 G comprises the diagram for the situation that shows the impossible desired value of input;

Fig. 5 is the diagram that the startup of considering auxiliary machinery and the operation example that stops to be shown; And

The table that Fig. 6 illustrates the fuel cost that shows Optimum Operation, the Optimum Operation of considering auxiliary machinery and is used for traditional operation relatively.

Embodiment

Below, with reference to accompanying drawing embodiments of the invention are described.

Embodiment 1

Fig. 1 is the diagram that illustrates according to the configuration of the optimal load allocating system of the embodiment of the invention 1.At first, with reference to Fig. 1 configuration according to the optimal load allocating system of embodiment 1 is described.According to embodiment 1, optimal load allocating system has: data input device 1, and it is used for the specification of equipment of input needed each unit of optimal load allocating (two unit); Optimal load allocating input file 2, its storage is by the data of data input device 1 input; Optimal load allocating calculation element 3, it carries out optimal load allocating calculating based on the data that are stored in the optimal load allocating input file 2; Optimal load allocating input file 4, the result of calculation that its storage is carried out by optimal load allocating calculation element 3; Optimal load allocating mode display unit 5, it shows the transmitting terminal characteristic curve of each unit, the fuel cost curve of each unit, the load optimum allocation curve that each unit is relatively always exported, the fuel cost curve of total output, and the fuel cost curve that is used for coming based on the data that are stored in optimal load allocating output file 4 and optimal load allocating input file 2 distribution of comparison conventional load and optimal load allocating; And optimal load allocating scheduling display unit 6, it shows electric power transfer time scheduling table, electric power transfer time scheduling curve, and the fuel cost comparison sheet of different operation modes.

Next, will the operation of optimal load allocating system be described.At first, optimal load allocating is calculated required data quilt by data input device 1 input.The input data item comprises the efficiency of transmission (%) of minimum output (MW), maximum output (MW), through-put power (MW), through-put power, every calorie of price (unit/kcal), load variations ratio (%/minute), uses the through-put power (MW) of auxiliary machinery, auxiliary machinery running time (hour) and the through-put power (MW) of expectation of per time period.Although price represents with Chinese unit, certainly, the present invention can be used to other monetary unit.

Next, will the calculating of fuel cost be described progressively.Described calculating comprises following.

Heat input continuous item

Unit of fuel price K (unit/kg)

Fuel value L (kcal/kg)

Fuel uses G (kg)

Every calorie of price M (unit/kcal)=K/L

Heat input Q (kcal)=G * L

Total cost N (unit)=Q * M

The thermal output continuous item

Power output P (MW)=P * 860 * 1000 (kcal)

Efficient μ (%)

Power manufacturing cost C (unit/kW)

By determining described efficient with thermal output divided by heat input.

[formula 1]

$\mathrm{\μ}=\frac{P\×860\×1000}{Q}\×100$

$=\frac{P}{Q}\×8.6\×{10}^7....\left(1\right)$

This formula can be reduced to the following equation about Q (obtaining the needed heat input of power output P).

[formula 2]

$Q=\frac{P}{\mathrm{\μ}}\×8.6\×{10}^7....\left(2\right)$

By determining fuel cost with total cost divided by the amount of the electrical power that generates.

[formula 3]

$C=\frac{Q\×M}{P\×1000}....\left(3\right)$

$=\frac{\frac{P}{\mathrm{\μ}}\×8.6\×{10}^4\×M}{P\×1000}$

$=\frac{M}{\mathrm{\μ}}\×8.6\×{10}^4....\left(4\right)$

Therefore, fuel cost can (unit/kcal) and efficient (%) be determined by every calorie of price.

[formula 4]

Suppose μ=f (P),

$C=\frac{M}{f\left(P\right)}\×8.6\×{10}^4.......\left(5\right)$

From formula (3), the fuel cost of two unit (first module and second unit) can followingly be determined.

[formula 5]

$C=\frac{{\mathrm{<figure-callout\; id="1"\; label="Q"\; filenames="S2008101428815E00071.png,S2008101428815E00121.png"\; state="\{\{state\}\}">Q</figure-callout>}}_1\&times;{\mathrm{<figure-callout\; id="1"\; label="M"\; filenames="S2008101428815E00071.png,S2008101428815E00121.png"\; state="\{\{state\}\}">M</figure-callout>}}_1+{\mathrm{<figure-callout\; id="2"\; label="Q"\; filenames="S2008101428815E00031.png,S2008101428815E00151.png"\; state="\{\{state\}\}">Q</figure-callout>}}_2\&times;M_2}{({\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="S2008101428815E00071.png,S2008101428815E00121.png"\; state="\{\{state\}\}">P</figure-callout>}}_1+P_2)\&times;1000}............\left(6\right)$

$=\frac{\frac{{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="S2008101428815E00071.png,S2008101428815E00121.png"\; state="\{\{state\}\}">P</figure-callout>}}_1}{{\mathrm{\&mu;}}_1}\&times;8.6\&times;{10}^7\&times;{\mathrm{<figure-callout\; id="1"\; label="M"\; filenames="S2008101428815E00071.png,S2008101428815E00121.png"\; state="\{\{state\}\}">M</figure-callout>}}_1+\frac{{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="S2008101428815E00031.png,S2008101428815E00151.png"\; state="\{\{state\}\}">P</figure-callout>}}_2}{{\mathrm{\&mu;}}_2}\&times;8.6\&times;{10}^7\&times;M_2}{({\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="S2008101428815E00071.png,S2008101428815E00121.png"\; state="\{\{state\}\}">P</figure-callout>}}_1+P_2)\&times;1000}$

$=\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="S2008101428815E00071.png,S2008101428815E00121.png"\; state="\{\{state\}\}">P</figure-callout>}}_1+{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="S2008101428815E00031.png,S2008101428815E00151.png"\; state="\{\{state\}\}">P</figure-callout>}}_2}\&times;(\frac{{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="S2008101428815E00071.png,S2008101428815E00121.png"\; state="\{\{state\}\}">P</figure-callout>}}_1\&times;{\mathrm{<figure-callout\; id="1"\; label="M"\; filenames="S2008101428815E00071.png,S2008101428815E00121.png"\; state="\{\{state\}\}">M</figure-callout>}}_1}{{\mathrm{\&mu;}}_1}+\frac{{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="S2008101428815E00031.png,S2008101428815E00151.png"\; state="\{\{state\}\}">P</figure-callout>}}_2\&times;{\mathrm{<figure-callout\; id="2"\; label="M"\; filenames="S2008101428815E00031.png,S2008101428815E00151.png"\; state="\{\{state\}\}">M</figure-callout>}}_2}{{\mathrm{\&mu;}}_2})\&times;8.6\&times;{10}^4...........\left(7\right)$

Suppose μ ₁=f ₁(P ₁), μ ₂=f ₂(P ₂) and T=P ₁+ P ₂

$C=\frac{1}{T}\&times;(\frac{{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="S2008101428815E00071.png,S2008101428815E00121.png"\; state="\{\{state\}\}">P</figure-callout>}}_1\&times;M_1}{f_1\left(P_1\right)}+\frac{(T-P_1)\&times;M_2}{f_2\left(P_2\right)})\&times;8.6{\&times;10}^4..........\left(8\right)$

Realize the needed fuel cost C of total output T (MW) (unit/kWh) change along with the output P1 (MW) of first module.The value that minimizes the output P1 of fuel cost C can use formula (8) to determine.

How Fig. 2 A illustrates fuel cost along with the output P1 of first module and the rate of change of always exporting T.The effective range of output P1 need to meet following condition.

The effective range of＜P1 〉

The effective range of output P1 should be scope { minimum of the P1 〉=correlation unit (output) } and scope { (maximum of P1≤correlation unit is exported) }, and less one in the scope { (P1≤always export T) }.

As mentioned above, according to embodiment 1, because the specification of equipment of each unit (two unit) is transfused to, can calculates the load that makes between the minimized unit of fuel cost for the specified total output of distribution substation and distribute.

Embodiment 2

Below, embodiment of the present invention will be described 2.Except data input device can be processed three or more unit, the configuration of the optimal load allocating system of embodiment 2 was identical with embodiment 1, therefore, and with the description of omitting its configuration.

Next, will the operation of this optimal load allocating system be described.Fig. 2 B illustrates related exemplary optimum load Distribution Calculation in the operation according to embodiment 2.Except the quantity of unit, the input/output data item is identical with computational methods with embodiment 1.

In embodiment 2, suppose the optimal load allocating between three unit (first module, second unit and Unit the 3rd) is calculated.In the situation that three or more unit, those unit are grouped into two dummy units.In embodiment 2, Unit first and second are grouped into virtual N unit.Preferably nominal load and the approaching as far as possible unit of fuel use amount are grouped in together.

For the computing formula in the Application Example 1, the gross efficiency of virtual N unit must be determined by the formula among the embodiment 1 (8).According to the formula among the embodiment 1 (1), can be by determining efficient with thermal output divided by heat input.

The output of supposing the first maker is P1 (MW), and the output of the second maker is P2 (MW), then can determine according to following formula the thermal output of virtual N unit.

The thermal output of virtual N unit=(P1+P2) * 860 * 1000 (kcal)

Next, the heat input of virtual N unit will be determined.Because described heat input is the amount of input heat, therefore described hot input can use (kg) to determine by fuel value (kcal/kg) and fuel.

The fuel value of supposing first module is Q1 (kcal/kg), the fuel value of second unit is Q2 (kcal/kg), it is G1 (kg) that the fuel of first module uses, it is G2 (kg) that the fuel of second unit uses, and then can determine according to following formula the heat input of virtual N unit.

The heat input of virtual N unit=(Q1 * G1)+(Q2 * G2) (kcal)

Therefore, can determine according to following formula the efficient μ of virtual N unit.

[formula 6]

$\mathrm{\&mu;}=\frac{(\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="S2008101428815E00071.png,S2008101428815E00121.png"\; state="\{\{state\}\}">P</figure-callout>}1+P2)\&times;860\&times;1000}{(\mathrm{<figure-callout\; id="1"\; label="Q"\; filenames="S2008101428815E00071.png,S2008101428815E00121.png"\; state="\{\{state\}\}">Q</figure-callout>}1\&times;G1)+(\mathrm{<figure-callout\; id="2"\; label="Q"\; filenames="S2008101428815E00031.png,S2008101428815E00151.png"\; state="\{\{state\}\}">Q</figure-callout>}2\&times;G2)}\&times;100$

By the formula among the embodiment 1 (8), can determine the power output of Unit the 3rd and virtual N unit, this power output minimizes the cost of electricity-generating of virtual N unit and Unit the 3rd.

Next, virtual N unit is reduced to first module and second unit, and determines the optimal load allocating curve of first module and second unit by the calculating described in the execution embodiment 1.

As mentioned above, according to embodiment 2, although three or more unit are arranged, the application by embodiment 1 can operate generating equipment with the fuel cost of minimum.

Embodiment 3

Below, with the optimal load allocating system of describing according to the embodiment of the invention 3.The configuration of the optimal load allocating system of embodiment 3 is identical with embodiment's 1, therefore, and with the description of omitting its configuration.

Next, will the operation of this optimal load allocating system be described.Optimal load allocating mode display unit 5 among the embodiment 1 shows following curve, and described curve is based on the optimal load allocating output data that are stored in data in the optimal load allocating input file 2 and optimal load allocating calculation element 3 and calculate.

＜curve of output 〉

(1) the transmitting terminal efficiency characteristic curve of each unit and fuel cost curve (as shown in Figure 3A)

(2) distribute to the optimal load of each unit with respect to the curve of total output, and the fuel cost curve (shown in Fig. 3 B) of total output

(3) the conventional load curve (shown in Fig. 3 C) that distributes the fuel cost curve of (even load distributions) and be used for conventional load distribution and optimum allocation are compared

The transmitting terminal efficiency characteristic curve of each unit shown in Fig. 3 A is based on through-put power (MW) and through-put power is drawn via the efficiency of transmission (%) of data input device 1 input.

Similarly, the fuel cost curve shown in Fig. 3 A (unit/kW) can (determine by every calorie of price according to the formula among the embodiment 1 (4) by unit/kcal) and efficient (%).Thereby, optimal load allocating calculation element 3 by the efficient (%) by data input device 1 input and every calorie of price (unit/kcal) come the computing fuel cost (unit/kW), and calculate fuel cost be stored in the optimal load allocating output file 4.Based on the data of storing, show the fuel cost curve of each unit.

Fig. 3 B illustrates the load that optimally is assigned to unit separately with respect to the curve of total output.Can be according to the formula among the embodiment 1 (8), determine to minimize and realize one output fuel cost that described total output is required, in two unit.The output of other unit can be determined by the output that deducts a unit from total output.By this way, can draw two unit with respect to the curve of output of total output.

Similarly, the fuel cost curve of the shown total output of Fig. 3 B is the mean value figure of the fuel cost of the unit that calculates according to the formula among the embodiment 1 (4).

The shown curve of Fig. 3 C comprises the fuel cost curve of total output of the fuel cost curve of traditional impartial batch operation and the Optimum Operation shown in Fig. 3 B, can compare fuel cost thereby they show at same screen.

As mentioned above, according to embodiment 3, the curve that is assigned to the fuel cost that the curve of output and be used for of the optimal load of unit compares with traditional operation shown visually, and therefore, the operator of generating equipment can recognize cost more.

Embodiment 4

Below, embodiment of the present invention will be described 4.The configuration structure of the optimal load allocating system of embodiment 4 is identical with embodiment's 1, therefore, and with the description of omitting this configuration.

Next, the operation of optimal load allocating system is described with reference to Fig. 4 A.Following description, the form shown in Fig. 4 A will be divided into four following zones and the scheduling of the optimal load allocating in embodiment 1 display unit 6 shows.

(1) zone of total output of input expectation

(2) zone of total output of demonstration expectation

(3) be presented at the zone of the operation scheduling of each unit after the optimal load allocating

(4) be presented at the zone of the total output after the optimal load allocating

This four zones below will be described.

(1) zone of total output of input expectation is to input in one day the zone of desired total output valve in each time period by the data input device 1 among the embodiment 1.For example, total output 450MW of input 0:00, total output 510MW of 1:15 and total output 460MW of 4:00.

After data are transfused to, optimal load allocating calculation element 3 among the embodiment 1 is carried out and is calculated, and the zone (2) in the total output that be used for to show expectation shows end value, and zone (3) is used for showing the total output after the operation scheduling of each unit after the optimal load allocating and zone (4) are used for the demonstration optimal load allocating.

(2) based on the shown value in zone in the total output that be used for to show expectation, the overall transmission power output scheduling curve of the expectation shown in Fig. 4 B is shown.In Fig. 4 B, figure is similar step-like, because the output of last expectation was held before the expected time of being close to the output that changes expectation.

(3) zone of the operation scheduling of each unit after being used for showing optimal load allocating, output valve and the time in one day after calculating optimal load allocating by the optimal load allocating calculation element 3 among the embodiment 1 are shown.

Based on these data, the through-put power output scheduling curve of each unit shown in Fig. 4 C is shown.In physical device operation, need time of certain-length to realize the output expected, therefore, this figure does not have the stepped form shown in Fig. 4 B.Therefore, use loading rate by data input device 1 input among the embodiment 1 (%/minute) to adjust to increase or time of minimizing load.

Particularly, increasing in the loaded situation, load begins little by little to be increased before the time of expectation.Calculate based on load change rate and to begin to increase the loaded time, thereby realize the output of expectation in the time of expectation.In the situation that reduce load, after the time of expectation, begin to reduce load based on loading rate.

The time of finishing the load minimizing that begins to increase the loaded time and calculate thus is also shown in the zone (3), and this zone (3) are used for showing the operation scheduling of each unit after optimal load allocating.Fig. 4 E illustrates the specific examples of the curve of having considered loading rate and having drawn.

If be provided with large load variations at short notice, to such an extent as to its process based on loading rate can't be processed too slowly, then show the indication of impossible operation.Fig. 4 F is illustrated in the specific examples (dispatch list) in the situation that impossible desired value is set up, and Fig. 4 G is illustrated in specific examples (curve) in the situation that impossible desired value is set up.

(4) after optimal load allocating, show total zone of exporting, demonstration is according to total output of the time of the load variations of each shown in zone (3) unit, and zone (3) is used for by show the afterwards operation scheduling of each unit of optimal load allocating with age mode sorting time.Fig. 4 D illustrates the output scheduling curve based on the through-put power of the whole equipment of described data.

As mentioned above, according to embodiment 4, the operation scheduling table of each unit after optimal load allocating and the operation scheduling curve of each unit can be shown, and therefore, can help the operator to adjust output to realize Optimum Operation.

In addition, begin to increase the loaded time and finish the time that load reduces owing to calculating, so can be provided in very important power supply guarantee in the power sale.In addition, even inputted the inconsistent data that cause in the equipment operating, also can show the indication of impossible operation, therefore, can avoid the faulty operation that is caused by misdata.

Embodiment 5

Next, embodiment of the present invention will be described 5.The configuration of the optimal load allocating system of embodiment 5 is identical with embodiment's 1, therefore, omits the description to this configuration.

Below, the operation of optimal load allocating system is described with reference to Fig. 5.Based on the running time of the auxiliary machinery by data input device input and the through-put power of use (in use of) auxiliary machinery among the embodiment 1, the optimal load allocating calculation element among the embodiment 1 is carried out optimal load allocating and is calculated in the startup of considering auxiliary machinery and situation about stopping.

Particularly, when calculating the optimal load allocating that minimizes fuel cost, the auxiliary machinery running time of input before if resulting auxiliary machinery is equal to or less than running time, and the transmitting energy of the use auxiliary machinery of input before the through-put power of resulting use auxiliary machinery is equal to or less than, then can carry out reschedule, start auxiliary machinery and also do not relate to the scheduling that stops auxiliary machinery in order to automatically be transformed into neither to relate to from the scheduling that minimizes fuel cost.

If be that a unit reschedule optimal load allocating causes the startup of the auxiliary machinery in another unit and stops, then stop the reschedule to the optimal load allocating of this unit, and adopt and pay the utmost attention to the scheduling that fuel cost reduces.

As mentioned above, according to embodiment 5, except minimizing the optimal load allocating of fuel cost, it also is possible minimizing the startup of auxiliary machinery and the scheduling of stop frequency.Therefore, except the reduction of fuel cost, the maintenance cost of auxiliary machinery also can be lowered.

Embodiment 6

Below embodiment of the present invention will be described 6.The configuration of the optimal load allocating system of embodiment 6 is identical with embodiment's 1, therefore, and with the description of omitting this configuration.

Next, the operation of optimal load allocating system is described with reference to Fig. 6.Based on the data by data input device 1 input among the embodiment 1, optimal load allocating calculation element 3 is calculated as follows the fuel cost in the situation: in the situation that by optimally distributing load to come the fuel cost of operating said equipment, in the startup by having considered auxiliary machinery with stop and optimally distributing load to come fuel cost in the situation of operating said equipment, and the fuel cost in the situation of coming operating said equipment by traditional equalization distribution load, and its result is stored in the optimal load allocating output file 4.

Next, optimal load allocating scheduling display unit 6 show (each unit) each operator scheme that comes from the fuel cost that is stored in each pattern in the optimal load allocating output file 4 every day fuel cost and every day fuel price.

For relatively, also show below content: in the situation that by optimally distributing load to come the cost of operating said equipment and in the startup by having considered auxiliary machinery with stop and optimally distributing load to come difference between the cost in the situation of operating said equipment; And in the situation that by optimally distributing load to come cost and the difference between the cost in the situation of coming operating said equipment by traditional equalization distribution load of operating said equipment.Every day-rate cost and annual cost can be shown to be used for relatively.

As mentioned above, according to embodiment 6, can the fuel cost of various modes be compared.Therefore, can make the operator recognize more the cost of cost and help administrator administers power sale.

Claims (9)

1. optimal load allocating system, it is used for management by total output of two or the generating equipment that forms more than two unit optimal load allocating in these unit, comprising:

Data input device, it is used for the specification of equipment of each required unit of input optimal load allocating;

The optimal load allocating input file, its storage is via the data of described data input device input;

The optimal load allocating calculation element, it is carried out optimal load allocating and calculates based on the data that are stored in the described optimal load allocating input file;

The optimal load allocating output file, its storage is by the result of the performed described calculating of described optimal load allocating calculation element;

The optimal load allocating mode display unit, it shows below content: the transmitting terminal characteristic curve of each unit; The fuel cost curve of each unit; Optimally be assigned to the load of each unit with respect to the curve of described total output; The fuel cost curve of described total output; And be used for relatively based on the described optimal load allocating of the data that are stored in described optimal load allocating output file and described optimal load allocating input file and the fuel cost curve of conventional load distribution; And

Optimal load allocating scheduling display unit, it shows the fuel cost comparison sheet of electric power transfer time scheduling table, electric power transfer time scheduling curve and different operation modes.

2. optimal load allocating system according to claim 1, it further comprises the device of the optimal load allocating calculating that can carry out in the following way three or more unit: three or more unit are grouped into two dummy units, and will arrive described two dummy units for the optimal load allocating computing application of described two unit.

3. optimal load allocating system according to claim 1, wherein said optimal load allocating mode display unit visually show the load that is assigned to each unit and the total fuel cost that calculates with respect to described total output.

4. optimal load allocating system according to claim 1, wherein based on the through-put power output valve of the expectation of each time period of inputting, carry out described optimal load allocating and calculate, and show operation scheduling curve and the operation scheduling table of the optimal load allocating between the description unit.

5. optimal load allocating system according to claim 4, wherein when will display operation during scheduling, operation scheduling is designed to minimize the startup of auxiliary machinery and the number of times that stops based on following content: in the situation that the through-put power that auxiliary machinery changes, and the auxiliary machinery operating time of the minimum of inputting via described data input device.

6. optimal load allocating system according to claim 5, wherein, in the situation of generation above the large load variations in the short time of the disposal ability of described system, calculating operation is inconsistent and show visually this inconsistent state, in described operation is inconsistent, before being reduced fully, load has to increase load.

7. optimal load allocating system according to claim 1 wherein compares its total fuel cost between three kinds of situations, and described three kinds of situations comprise: load on the situation of being distributed equably between the described unit; Startup by considering auxiliary machinery and stop and between described unit, distributing the situation of load; And the situation of optimally distributing load by paying the utmost attention to cost.

8. optimal load allocating system according to claim 4, wherein total output valve of expectation is pre-entered, loading rate according to each unit, beginning increases load gradually before the time of expectation, thereby increasing the output that realizes expectation in the loaded situation in the time of expectation, after the time of expectation, begin to reduce load, and in the situation that reduce the realization time of the load of load calculation expectation, and optimal load allocating is dispatched display unit and is shown this result.

9. optimal load allocating method, it is used for total output of the generating equipment that management is composed of multiple units in the optimal load allocating of described a plurality of unit, comprising:

The specification of equipment of each unit that the input optimal load allocating is required and storage input data;

Carry out the result that this calculating was calculated and stored to optimal load allocating based on described data;

Show below content: the transmitting terminal characteristic curve of each in described a plurality of unit; The fuel cost curve of each in described a plurality of unit; Optimally be assigned to each load in described a plurality of unit with respect to the curve of described total output; The fuel cost curve of described total output; And be used for comparison based on the result's of described data and described calculating described optimal load allocating and the fuel cost curve of conventional load distribution; And

The fuel cost comparison sheet that shows electric power transfer time scheduling table, electric power transfer time scheduling curve and different operation modes.

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