JP3392667B2 - Plant optimal load distribution calculation system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant optimum load distribution calculation system applied to, for example, a thermal power plant. 2. Description of the Related Art Generally, in a power plant such as a thermal power plant including a plurality of power generation units, it is necessary to determine an optimum load distribution, that is, an optimum distribution of a fuel amount to each power generation unit. is there. Conventionally, the optimum load distribution is calculated by an iterative convergence calculation using a calculation formula for calculating the total transmission power of the power plant from the fuel amount of each power generation unit (hereinafter referred to as a plant total transmission power calculation formula). Was required by law. [0004] In the conventional method for calculating the optimal load distribution, the formula for calculating the total transmission power of the plant is very complicated, so that the repetitive calculation does not converge and a solution for the optimal load distribution is obtained. May not be possible. In addition, since the number of times of repeated convergence calculation is several thousand, and the number of calculations varies greatly depending on the operating condition of the power plant, the response time from input of a request by an operator to output of optimal load distribution is long and constant. There was a problem that did not become. [0005] Further, since it is difficult to mathematically incorporate the factor of plant operation into search conditions,
In some cases, an easy solution for plant operation could not be obtained. SUMMARY OF THE INVENTION An object of the present invention is to provide a plant optimum load distribution calculation system capable of obtaining an optimum load distribution reliably and with a fixed short response time to a request input. [0006] In order to solve the above-mentioned problems, the present invention relates to a plant optimum load distribution calculation system used for a power plant composed of a plurality of power generation units, which is provided with input plant status data. Calculation means for calculating the transmission power amount of each power generation unit for all cases of the discretely set fuel amount, storage means for storing the calculation result of the calculation means, and total fuel consumption from the storage means. Search means is provided for searching for an optimum combination among combinations of cases where the total amount of fuel of each power generation unit matches the required amount. According to the present invention, the amount of transmission power of each power generation unit is calculated based on the plant status data in accordance with the case of the fuel amount, and from these, the required amount such as the total required fuel consumption is calculated. Since the optimal load distribution of the entire power plant is found by searching for the optimal combination of cases, the calculation does not diverge and the solution is not found as in the conventional iterative convergence calculation method. As a result, optimal load distribution can be reliably obtained. Further, since the calculation of the amount of transmitted power, which requires a relatively long processing time, is completed before the total required fuel consumption is input,
After inputting the total required fuel consumption, it is only necessary to perform a search process, and an optimum load distribution can be obtained with a fixed short response time in response to a request input by an operator. Further, various factors such as easiness of plant operation can be easily included in the processing as search conditions. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration of a plant optimum load distribution calculation system according to an embodiment of the present invention. This system is applied to a power generation plant including a plurality of power generation units such as a thermal power generation plant, for example, an analyzer 1 and a temperature sensor 2 for obtaining plant status data, and a transmission power amount of each power generation unit. , A case storage unit 4 for storing the calculation result of the case calculation unit 3, an optimum value search unit 5 for searching the case storage unit 4 to obtain an optimum load distribution, and an input used for an input operation by an operator. The device 6 is constituted by a display device 7 for displaying data such as the optimum additional distribution. Note that the case storage unit 3 and the optimum value search unit 5 are realized by a CPU. Here, the analyzer 1 and the temperature sensor 2
The required number of the power generation units are installed at predetermined positions, the analyzer 1 obtains the fuel properties of each power generation unit, and the temperature sensor 2 outputs various temperature data such as the combustion chamber temperature of each power generation unit. To get. Data acquired by the analyzer 1 and the temperature sensor 2 is used as plant status data. Hereinafter, the operation of the present system will be described with reference to the flowchart of FIG. In the present system, as described above, the plant status data relating to the power generation plant is measured by the analyzer 1 and the temperature sensor 2, and the average value of the plant status data over a certain period of time (for example, one hour) is calculated at a predetermined period (for example, one hour). The data is input to the case calculation unit 3 in a one-hour cycle (step S1). The case calculation unit 3 calculates the transmission power amount of each power generation unit for all the cases of the discretely set fuel amount based on the average value of the input plant situation data (step S2). . For example, if the amount of fuel to be supplied is 1 to 10 t / h (ton / hour),
In a power generation unit that can be changed at intervals of t / h, the transmission power amount with respect to the fuel amount is calculated for all 11 cases. Therefore, for the entire power plant,
(Number of power generation units) × (number of cases) calculations are performed. In addition, it is assumed that a calculation formula for calculating the transmission power amount from the fuel amount of each power generation unit is set in the case calculation unit 3. Further, this calculation process may be performed by distributed processing using a different computer for each power generation unit. The calculation result of the case calculation unit 3 is stored in the case storage unit 4 (step S3). FIG. 3 is an example of data stored in the case storage unit 4, and shows the unit name of each power generation unit, a set case number, a fuel amount corresponding to each case number, and a calculated transmission power amount. I have. The processing of steps S1 to S3 described above
The average value of the plant situation data is repeated in one-hour cycles, and the contents stored in the case storage unit 3 are updated each time. On the other hand, in this system, apart from the repetition of the processing of steps S1 to S3 described above, the optimum load distribution is calculated in accordance with the following procedure according to the request of the operator.
That is, when the total fuel consumption request amount, that is, the fuel amount to be consumed by the entire power generation plant is input together with the calculation command of the optimum load distribution from the input device 6 (step S4).
The optimum value search unit 5 searches the case storage unit 4 for combinations (patterns) of cases where the total required fuel consumption and the sum of the combustion amounts of the respective power generation units are equal, and calculates the total transmitted power amount for each of the obtained patterns. calculate. For example, when the case storage unit 4 shown in FIG. 3 is searched under the condition of the total required fuel consumption amount of 4.0, the following pattern and the total transmitted power amount are obtained. (Pattern 1) Unit 1: Case 1+
Unit 2: Case 1 + Unit 3: Case 2 ... Total transmission power 4.0 (pattern 2) Unit 1: Case 1 + Unit 2:
Case 2 + Unit 3: Case 1 ... Total transmission power 3.9 (Pattern 1) Unit 1: Case 2 + Unit 2:
Case 1 + Unit 3: Case 1 ... Total transmitted power amount 3.9 Further, the optimum value search unit 5 selects one pattern in which the total transmitted power amount is as large as possible and the plant operation is easy among the obtained patterns ( In step S6, the fuel amount of each power generation unit indicated by the pattern is displayed on the display device 7 as the optimal load distribution (step S7). In addition,
In selecting a pattern, factors other than the ease of plant operation may be considered as necessary. As described above, in the present system, the transmission power amount of each power generation unit is calculated for all cases of the fuel amount based on the input plant condition data, and the calculation result matches the total fuel consumption requirement amount. Since the combination of cases is searched and the optimal combination according to the request among the obtained combinations of cases is output as the optimal load distribution, the solution diverges as in the conventional iterative convergence calculation method. The optimum load distribution can be obtained without fail. Further, since the calculation of the amount of transmission power, which takes a relatively long time, has been completed before the input of the total required fuel consumption, only the search processing is performed after the total required fuel consumption is input by the operator. Get better. Therefore, unlike the conventional method in which the transmission power amount is calculated after the total fuel consumption request amount is input, the optimum load distribution is obtained in a certain short response time to the input of the request. in this case,
Since the contents of the case storage unit 4 to be searched are updated at predetermined intervals according to the input of the average value of the plant status data, the optimum load distribution to be obtained depends on the operation status of the power plant at that time. Appropriately reflected.
Furthermore, since various factors such as ease of plant operation can be included in the search condition, it is possible to obtain more practical optimum load distribution. As described above, according to the present invention, by calculating the transmission power amount of each power generation unit for each predetermined case based on the plant status data, the total fuel consumption After a request such as quantity is entered, it is only necessary to search for combinations of cases that satisfy the request,
The optimum load distribution can be obtained with a certain short response time in response to a request input.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of an optimal load distribution calculation system according to an embodiment of the present invention. FIG. 2 is a flowchart for explaining the operation of the embodiment. 1 is a diagram showing an example of data stored in a case storage unit in 1. [Description of reference numerals] 1 ... Analyzer 2 ... Temperature sensor 3 ... Case calculation unit 4 ... Case storage unit 5 ... Optimal value search unit 6 ... Input device 7 … Display device

Claims (1)

(57) [Claims 1] In a plant optimal load distribution calculation system used for a power plant composed of a plurality of power generation units, transmission of each power generation unit is performed based on input plant status data. Calculating means for calculating the amount of electric power for all cases of the fuel amount discretely set; storing means for storing the calculation result of the calculating means; and Of the combinations of cases where the total fuel amount matches, the total transmitted power amount is large and the latest operation of the plant
Select one easy pattern of plant operation reflecting the situation
And a search means for searching for an optimum combination .