CN115017728A - Power consumption correction method for air compressor system in unit overall performance test - Google Patents
Power consumption correction method for air compressor system in unit overall performance test Download PDFInfo
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- 238000011056 performance test Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012937 correction Methods 0.000 title abstract description 7
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000013461 design Methods 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F30/20—Design optimisation, verification or simulation
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
- G06Q10/06393—Score-carding, benchmarking or key performance indicator [KPI] analysis
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- G—PHYSICS
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
Abstract
The invention discloses a method for correcting power consumption of an air compressor system in a unit overall performance test, which comprises the following steps: A. obtaining theoretical air consumption of each compressed air user and equipment of the whole plant under rated load before testing; B. obtaining the compressed air capacity of an air compressor; C. obtaining the number of air compressors which need to be operated simultaneously by the compressed air users and equipment of the whole plant under the rated load; D. obtaining the nominal power of an air compressor; E. obtaining the theoretical power value of the air compressor system under the rated load; F. obtaining the power of an air compressor system when one unit operates under a rated load; G. before the test, all the compressed air storage tanks are stored to high pressure, so that the air compressor system is ensured not to consume power during the test. The correction method provided by the method can be used for correcting factors influencing the power consumption of the air compressor system to design conditions, and is beneficial to comparing the overall performance test result of the thermal power generating unit with the design guaranteed value.
Description
Technical Field
The invention belongs to the field of thermal performance tests of thermal power generating units, and particularly relates to a power consumption correction method for an air compressor system in a unit overall performance test.
Background
In thermal power unit power plant equipment, the power consumption of auxiliary equipment of the power plant is an extremely important guarantee index in a thermal power unit performance assessment test, and has direct influence on the overall performance test result of the thermal power unit. The method is not only an important component of the unit power supply coal consumption, but also an important index for reflecting the unit auxiliary equipment power consumption.
The air compressor system of the thermal power generating unit is used as a main auxiliary system of the thermal power generating unit, and the compressed air storage tank is arranged, so that the amount of compressed air consumed by the unit and the power consumption of the air compressor during the test do not correspond to each other, and therefore the actual power consumption of the air compressor system during the test cannot be directly taken into performance calculation as a measured value, and the actual power consumption should be converted through the compressed air consumption during the test. However, in the usual case, compressed air tanks are generally calibrated by the value of the pressure inside the tank, and therefore there is no effective means to count or measure the actual consumption of compressed air during the test.
In summary, a method for correcting the power consumption of the air compressor system in the plant power consumption calculation is needed to make the power consumption of the air compressor system in the overall performance test of the thermal power generating unit closer to the actual power consumption, so that the overall performance test result of the thermal power generating unit is more accurate.
Disclosure of Invention
The invention aims to provide a method for correcting the power consumption of an air compressor system in a unit overall performance test. In the overall performance test of the thermal power generating unit, the method provided by the invention can correct the power consumption of the actually measured air compressor system to the corresponding design condition.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a method for correcting power consumption of an air compressor system in a unit overall performance test comprises the following steps:
A. before the unit overall performance test, the theoretical air consumption of each compressed air user and equipment of the whole plant under the rated load is obtained through design data, and the step B is carried out;
B. obtaining the compressed air capacity of an air compressor through the data of a manufacturer, namely the maximum standard cubic number of air which can be compressed in each hour, and entering the step C;
C. d, calculating the number of air compressors which need to be operated simultaneously by each compressed air user and equipment in the whole plant under the rated load, and entering the step D;
D. acquiring the nominal power of one air compressor, namely the power of one air compressor during full-load operation, wherein air dryers are matched with part of the compressors, and the nominal power of the air dryers is also taken into account, and entering the step E;
E. calculating the theoretical power value of the air compressor system under the rated load, and entering the step F;
F. converting the power into a test unit, calculating the power of an air compressor system when one unit operates under the rated load, and entering the step G;
G. before the unit overall performance test, storing the air in all the compressed air storage tanks to a high pressure level, and entering the step H;
H. in the subsequent performance test calculation, P is added to the total plant power consumption rated_test Or subtracting P from the generator outlet power measurement rated_test Entering step I;
I. and (4) performing the unit overall performance test according to the steps A-H, wherein the actual power consumption of the air compressor system can reflect the power consumption value of the system under the design condition.
The invention has the further improvement that in the step A, the compressed air of the thermal power plant is divided into three types: compressed air for instruments, compressed air for miscellaneous use and compressed air for ash conveying.
The invention is further improved in that in the step B, the compressed air capacity of one air compressor is obtained through the information of manufacturers.
The invention is further improved in that in the step C, the number of the air compressors which are required to be operated simultaneously by each compressed air user and equipment of the whole plant under the rated load is calculated by the formula (1):
wherein N is compressor The number of air compressors which are required to simultaneously operate under rated load for each compressed air user and equipment in the whole plant is one; f rated_total The total theoretical gas consumption of the compressed air users and equipment of the whole plant under rated load is in Nm 3 /h；F capacity Is one air compressorCompressed air capacity of the machine in Nm 3 /h。
In a further development of the invention, in step E, the theoretical power value of the air compressor system at the rated load is calculated by equation (2):
P rated_total ＝N compressor ×(P compressor +P dryer ) (2)
wherein, P rated_total The theoretical power value of the air compressor system under the rated load is kW; p compressor The nominal power of one air compressor is kW; p dryer Is the nominal power of the air dryer in kW.
In a further development of the invention, in step F, the power of the air compressor system is calculated by equation (3) when a unit is operated at nominal load:
wherein, P rated_test The unit is the power of an air compressor system when one unit operates under rated load, and the unit is kW; n is a radical of units The unit is the number of units in the whole plant.
The further improvement of the invention is that in the step G, during the test of the overall performance of the unit, the air compressor does not compress air, so that the air compressor system is ensured not to consume power.
The invention has at least the following beneficial technical effects:
in the overall performance test of the thermal power generating unit, the correction method provided by the method can be used for correcting the factors influencing the power consumption of the air compressor system to the design conditions, so that the obtained power consumption value of the air compressor system can reflect the power consumption under the design conditions, and the comparison of the overall performance test result of the thermal power generating unit and the design guarantee value is facilitated.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The following describes in detail the method for correcting the power consumption of the air compressor system in the unit overall performance test according to the present invention with reference to the accompanying drawings and examples.
As shown in the flow chart of fig. 1, the method for correcting the power consumption of the air compressor system in the unit overall performance test provided by the invention comprises the following steps:
A. before the unit overall performance test, theoretical air consumption of each compressed air user and equipment of the whole plant under rated load is obtained through design data, and the compressed air application of a general thermal power plant is mainly divided into three types: compressed air for instruments, compressed air for miscellaneous purposes, and compressed air for ash transport (transport of boiler fly ash). Entering the step B;
B. the compressed air capacity of an air compressor, namely the maximum standard cubic number of air which can be compressed per hour, is obtained through the data of a manufacturer. Entering the step C;
C. the number of air compressors which are required to be operated simultaneously by each compressed air user and equipment in the whole plant under rated load is calculated by the formula (1):
wherein N is compressor The number of air compressors which are required to simultaneously operate under rated load for each compressed air user and equipment in the whole plant is one; f rated_total The total theoretical gas consumption of the compressed air users and equipment of the whole plant under rated load is in Nm 3 /h；F capacity The compressed air capacity of one air compressor is in Nm 3 H is used as the reference value. Entering the step D;
D. the nominal power of an air compressor, namely the power of the air compressor during full-load operation, is obtained through the data of a manufacturer. Part of the compressors are provided with air dryers, the nominal power of which also needs to be taken into account. Entering the step E;
E. the theoretical power value of the air compressor system under the rated load is calculated by the formula (2):
P rated_total ＝N compressor ×(P compressor +P dryer ) (2)
wherein, P rated_total The theoretical power value of the air compressor system under the rated load is kW; p compressor The nominal power of one air compressor is kW; p dryer Is the nominal power of the air dryer in kW. Entering the step F;
F. the power is converted into a testing unit, and the power of the air compressor system when one unit operates under the rated load is calculated by the formula (3):
wherein, P rated_test The unit is the power of an air compressor system when one unit operates under rated load, and the unit is kW; n is a radical of units The unit is the number of units in the whole plant. Entering the step G;
G. before the unit overall performance is tested, all the compressed air storage tanks are stored to a high pressure level, and during the unit overall performance test, the air compressor does not compress air, so that the air compressor system is ensured not to consume power. Entering a step H;
H. in the subsequent performance test calculation, P is added to the total plant power consumption rated_test Or subtracting P from the generator outlet power measurement rated_test . Entering the step I;
I. and (4) performing the unit overall performance test according to the steps A to H, wherein the actual power consumption of the air compressor system can reflect the power consumption value of the system under the design condition.
The following calculation examples of the power consumption correction of the air compressor system in a certain thermal power project are as follows:
TABLE 1 theoretical air consumption of compressed air users and equipment in certain thermal power project under rated load
TABLE 2 Power consumption correction example for air compressor system in certain thermal power project
As can be seen from Table 2, in this example, the theoretical electric power of the air compressor system is 1362.70kW, and in the later performance test calculation, 1362.70kW needs to be added to the total plant power consumption or 1362.70kW needs to be subtracted from the measured value of the generator outlet power, so that the power consumption of the air compressor system calculated by the test can reflect the power consumption value of the system under the design conditions.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. The method for correcting the power consumption of the air compressor system in the unit overall performance test is characterized by comprising the following steps of:
A. before the unit overall performance test, the theoretical air consumption of each compressed air user and equipment of the whole plant under the rated load is obtained through design data, and the step B is carried out;
B. obtaining the compressed air capacity of an air compressor through the data of a manufacturer, namely the maximum standard cubic number of air which can be compressed in each hour, and entering the step C;
C. d, calculating the number of air compressors which need to be operated simultaneously by each compressed air user and equipment in the whole plant under the rated load, and entering the step D;
D. acquiring the nominal power of one air compressor, namely the power of one air compressor during full-load operation, wherein air dryers are matched with part of the compressors, and the nominal power of the air dryers is also taken into account, and entering the step E;
E. calculating the theoretical power value of the air compressor system under the rated load, and entering the step F;
F. converting the power into a test unit, calculating the power of an air compressor system when one unit operates under the rated load, and entering the step G;
G. before the unit overall performance test, storing the air in all the compressed air storage tanks to a high pressure level, and entering the step H;
H. in the subsequent performance test calculation, P is added to the total plant power consumption rated_test Or subtracting P from the generator outlet power measurement rated_test Entering step I;
I. and (4) performing the unit overall performance test according to the steps A-H, wherein the actual power consumption of the air compressor system can reflect the power consumption value of the system under the design condition.
2. The method for correcting the power consumption of the air compressor system in the unit overall performance test is characterized in that in the step A, the compressed air usage of the thermal power plant is divided into three types: compressed air for instruments, compressed air for miscellaneous use and compressed air for ash conveying.
3. The method of claim 1, wherein in step B, the compression capacity of an air compressor is obtained from factory data.
4. The method for correcting the power consumption of the air compressor system in the unit overall performance test of claim 1, wherein in the step C, the number of the air compressors which are required to be operated simultaneously by each compressed air user and equipment of the whole plant under the rated load is calculated by the formula (1):
wherein N is compressor The number of air compressors which are required to simultaneously operate under rated load for each compressed air user and equipment in the whole plant is one; f rated_total The total theoretical gas consumption of the compressed air users and equipment of the whole plant under rated load is in Nm 3 /h；F capacity Is the compressed air capacity of an air compressor, and the unit is Nm 3 /h。
5. The method for correcting the power consumption of the air compressor system in the unit overall performance test is characterized in that in the step E, the theoretical power value of the air compressor system at the rated load is calculated by the formula (2):
P rated_total ＝N compressor ×(P compressor +P dryer ) (2)
wherein, P rated_total The theoretical power value of the air compressor system under the rated load is kW; p compressor The nominal power of one air compressor is kW; p dryer Is the nominal power of the air dryer in kW.
6. The method for correcting the power consumption of the air compressor system in the unit overall performance test is characterized in that in the step F, the power of the air compressor system when one unit operates at the rated load is calculated by the formula (3):
wherein, P rated_test The unit is the power of an air compressor system when one unit operates under rated load, and the unit is kW; n is a radical of units The unit is the number of units of the whole plant.
7. The method of claim 1, wherein in step G, the air compressor is not compressing air during the unit overall performance test.
8. The method of claim 7, wherein in step G, the air compressor system is ensured not to consume power.
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