Industrial steam supply self-contained power plant production plant power consumption rate accounting method and system

Abstract

The invention belongs to the technical field of power consumption rate accounting, and provides an industrial steam supply self-contained power plant production plant power consumption rate accounting method and system, and the method comprises the steps: firstly obtaining the production plant power consumption and generating capacity of a self-contained power plant and the generating capacity of non-host equipment; then, the power consumption of a production plant is adjusted according to the deduction proportion of an additional increase part of the plant power consumption consumed by equipment due to external direct steam supply of a boiler and the deduction proportion of available energy loss allocation of external steam supply of a steam turbine; and finally, determining the power consumption rate of the production plant according to the ratio of the power consumption of the production plant to the sum of the generating capacity and the generating capacity of non-host equipment. The distribution of the power consumption rate of the production plant by two steam supply modes of external direct steam supply of the boiler and external steam supply of the steam turbine is considered, the accuracy of determining the power consumption rate of the production plant of the self-contained power plant is improved, and power generation enterprises and power supply companies can better grasp the power consumption rate index of the plant.

Description

Technical Field

[0001] The invention belongs to the technical field of power consumption rate calculation, and in particular relates to a power consumption rate calculation method and system for an industrial steam supply self-contained power plant. Background Art

[0002] The power consumption rate of a self-contained power plant refers to the percentage of power consumption of the power plant to the total power generated. The power consumption of the power plant refers to the power consumption of various auxiliary equipment during the power generation process of the generator set.

[0003] Since self-owned power plants have the dual nature of generating electricity and consuming electricity, the production electricity consumption of some non-power-generating enterprises is also included in the plant electricity consumption, which makes the identification more complicated. The actual plant electricity consumption rate of the power plant is affected by many factors such as the operation mode, external steam supply, and load rate. It changes greatly every day and is difficult to calculate. Especially for self-owned power plants with boilers directly supplying steam to the outside and steam turbines supplying steam to the outside, the existing plant electricity consumption rate calculation method does not involve how to allocate the production plant electricity consumption rate under the two steam supply methods of boilers directly supplying steam to the outside and steam turbines supplying steam to the outside, resulting in complex and inaccurate identification and calculation of the production plant electricity consumption rate, which cannot provide better production plant electricity consumption rate indicator data for power generation enterprises and power supply companies. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a method and system for calculating the power consumption rate of a production plant of an industrial steam-supplying self-contained power plant. The present invention adjusts the power consumption of the production plant by deducting the proportion of the additional increase in the power consumption of the equipment caused by the direct supply of steam by the boiler to the outside, and the deducting proportion of the allocation of available energy loss by the steam turbine to the outside, and considers the allocation of the power consumption rate of the production plant by the two steam supply methods of direct supply of steam by the boiler and the steam turbine to the outside, thereby improving the accuracy of determining the power consumption rate of the production plant of the self-contained power plant, which is beneficial for power generation enterprises and power supply companies to better grasp the power consumption rate indicators.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] In a first aspect, the present invention provides a method for calculating the power consumption rate of an industrial steam supply self-contained power plant, comprising:

[0007] Obtain the power consumption, power generation and power generation of non-host equipment of the self-provided power plant;

[0008] The deduction ratio of the additional power consumption of the equipment caused by the direct supply of steam from the boiler to the outside, and the deduction ratio of the available energy loss apportioned by the steam turbine to the outside to adjust the power consumption of the production plant;

[0009] The power consumption rate of the production plant is determined by the ratio of the power consumption of the production plant to the sum of the power generation and the power generation of non-host equipment.

[0010] Furthermore, the power consumption rate L of the production plant is:

[0011]

[0012] Among them, λ is the deduction ratio of the additional power consumption of the equipment caused by the direct supply of steam from the boiler to the outside; ε is the deduction ratio of the steam supply from the turbine to the outside according to the available energy loss; W h is the electricity consumption of the production plant; W f is the power generation; W zj Power generation for non-host equipment.

[0013] Furthermore, the deduction ratio for the additional increase in plant electricity consumption caused by the direct supply of steam from the boiler to the outside is equal to the product of the ratio of the direct supply of steam from the boiler to the boiler's steam production, and the ratio of the boiler system's electricity consumption to the total plant electricity consumption.

[0014] Furthermore, the deduction ratio of the available energy loss apportionment for external steam supply by the steam turbine is equal to the product of the available energy loss ratio and the ratio of the boiler system's power consumption to the total plant power consumption.

[0015] Furthermore, the available energy loss ratio δ is:

[0016]

[0017] Among them, G qj h is the steam flow rate of the steam turbine to supply external steam; qj Enthalpy of steam supplied by steam turbine to the outside; T 0 is the Kelvin temperature corresponding to the maximum temperature; T qj G is the Kelvin temperature corresponding to the external high-parameter power steam temperature; g is the steam output of the boiler; h g is the steam enthalpy at boiler outlet; T g is the Kelvin temperature corresponding to the boiler outlet steam temperature.

[0018] Furthermore, the electricity consumption is calculated by using two methods: the electricity at the high-voltage transformer substation gateway meter and the sum of the electricity consumption of each auxiliary equipment. If the deviation between the electricity at the high-voltage transformer substation gateway meter and the sum of the electricity consumption of each auxiliary equipment is less than or equal to a preset percentage, the electricity consumption of the production plant shall be the electricity at the high-voltage transformer substation gateway meter; otherwise, the electricity consumption of the production plant shall be a preset multiple of the sum of the electricity consumption of each auxiliary equipment.

[0019] In a second aspect, the present invention further provides a system for calculating power consumption rate of an industrial steam supply self-contained power plant, comprising:

[0020] The data acquisition module is configured to: obtain the power consumption, power generation and power generation of non-host equipment of the production plant;

[0021] The power consumption regulation module of the production plant is configured to: regulate the power consumption by deducting the additional power consumption of the equipment caused by the direct supply of steam by the boiler, and by deducting the power consumption by the turbine according to the apportionment of available energy loss;

[0022] The production plant power consumption rate determination module is configured to determine the production plant power consumption rate by the ratio of the production plant power consumption to the sum of the power generation and the power generation of non-host equipment.

[0023] In a third aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for calculating the power consumption rate of an industrial steam supply self-contained power plant described in the first aspect.

[0024] In a fourth aspect, the present invention further provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein when the processor executes the program, the steps of the method for calculating the power consumption rate of an industrial steam supply self-contained power plant described in the first aspect are implemented.

[0025] In a fifth aspect, the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the method for calculating the power consumption rate of an industrial steam supply self-contained power plant described in the first aspect are implemented.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] In the present invention, the power consumption of the production plant is first adjusted by the deduction ratio of the additional increase in the power consumption of the equipment caused by the direct external steam supply of the boiler, and the deduction ratio of the external steam supply of the steam turbine according to the apportionment of the available energy loss; then, the power consumption rate of the production plant is determined by the ratio of the power consumption of the production plant to the sum of the power generation and the power generation of non-host equipment; the apportionment of the power consumption rate of the production plant by the two steam supply methods of direct external steam supply of the boiler and external steam supply of the steam turbine is taken into account, which improves the accuracy of determining the power consumption rate of the production plant of the self-contained power plant, and is conducive to power generation enterprises and power supply companies to better grasp the power consumption rate indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0029] Figure 1 This is a flow chart of the method of Example 1 of the present invention. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0032] Embodiment 1:

[0033] As described in the background technology, the existing electricity consumption rate calculation method does not involve how to allocate the power consumption rate of the production plant under the two steam supply methods of direct steam supply from the boiler and steam supply from the turbine. This makes the identification and calculation of the power consumption rate of the production plant complicated and inaccurate, and cannot provide better plant power consumption rate indicator data for power generation enterprises and power supply companies.

[0034] In response to the above problems, Figure 1 As shown, this embodiment provides a method for calculating the power consumption rate of a production plant of an industrial steam supply self-provided power plant, which can be used for calculating the power consumption rate of a production plant of a large-scale industrial steam supply self-provided power plant. The method includes the following steps:

[0035] S1. Collect the primary system wiring diagram of the power plant, the primary wiring diagram of the plant power supply and other relevant information.

[0036] S2. Determine the types and quantities of the main auxiliary equipment of the power plant from the four types of auxiliary equipment, namely fuel preparation, fans, pumps and others, in the relevant data; the main auxiliary equipment may include fuel preparation and transportation system equipment, forced draft fans, induced draft fans, primary fans, secondary fans, circulating water pumps, feed water pumps, condensate pumps and desulfurization system equipment, etc.

[0037] S3. Determine the actual load operating range of the unit, take the highest, middle and lowest operating conditions according to the actual load operating range of the unit, and design the plant power consumption rate verification test. Optionally, the highest, middle and lowest operating conditions can be determined by preset values ​​or preset ranges.

[0038] S4. The verification test requires that the unit's thermal system operates in accordance with the normal thermal cycle. When the plant power system is in normal operation, the power generation load is adjusted to the agreed load and the operating parameters are maintained stable. It runs for 1-2 hours, and the agreed load is the maximum load within the actual operating range. The power generation and power consumption of the generator, main transformer and major auxiliary equipment are recorded.

[0039] S5. Computer group gross power consumption rate L m for:

[0040]

[0041] Among them, W h is the power consumption of the production plant during the test period; W fis the power generation during the test period; W zj It refers to the power generation of non-host equipment during the test period.

[0042] S5.1. Electricity consumption of the production plant during the test period W h Determination of:

[0043] Electricity consumption of the production plant during the test period W h , does not include non-production electricity consumption during the trial period, electricity consumption of auxiliary equipment of external enterprises, electricity consumption of auxiliary equipment of shut down units, etc.; non-production includes comprehensive utilization and sideline businesses, etc.

[0044] Power consumption of production plant W h Optional statistical methods: The power consumption of the plant is calculated by using the power meter of the high-voltage transformer substation during the test period (or the difference between the power generation and the external power supply) and the sum of the power consumption of each major auxiliary equipment. The power meter of the high-voltage transformer substation (or the power generation, external power supply) is calculated by power transmitter, and the sum of the power consumption of each major auxiliary equipment is W. hh for:

[0045] W hh =∑W hi ,

[0046] Among them, i is the current value of each main auxiliary equipment; u is the voltage value of each main auxiliary equipment; It is the power factor of each main auxiliary equipment.

[0047] If the deviation between the power consumption of the high-voltage transformer and the power consumption of the main auxiliary equipment is less than or equal to 5% during the test period, the power consumption of the production plant during the test period W h Take the power consumption of the high-voltage transformer at the gate; if the deviation between the power consumption of the high-voltage transformer at the gate and the power consumption of the main auxiliary equipment during the test period is greater than 5%, the power consumption of the production plant during the test period W h Take 1.08 times the sum of the power consumption of all major auxiliary equipment.

[0048] S5.2. Power generation during the test period W f , which can be counted using power transmitters.

[0049] S5.3. Power generation of non-host equipment during the test period W zj Determination of:

[0050] Optionally, in the case where the steam entering the steam turbine performs work in the steam turbine and then enters the small back pressure machine to perform work and generate electricity, this part of the electricity should be included in the power generation of non-host equipment during the test period.

[0051] S6. The power consumption rate L of the computer group production plant is:

[0052]

[0053] Among them, λ is the deduction ratio of the additional increase in plant electricity consumption caused by the direct supply of steam from the boiler to the outside; ε is the deduction ratio of the steam supply from the turbine to the outside according to the available energy loss.

[0054] S6.1. Determination of the deduction ratio λ for the additional increase in the amount of electricity consumed by the equipment due to the direct supply of steam by the boiler:

[0055] The power consumption of the production plant refers to the power consumption of the equipment involved in the power generation process. In the case of direct steam supply from the boiler to the outside, this part of the steam does not participate in the power generation process, resulting in an additional increase in the power consumption of the equipment. It should be deducted in proportion. The deduction ratio λ is:

[0056] λ=αβ

[0057] Among them, α is the ratio of the boiler's direct external steam supply to the boiler's steam production; β is the proportion of the boiler system's power consumption to the total plant power consumption.

[0058] S6.1. Determination of the deduction ratio ε of the apportionment of available energy loss for steam turbine supply to external parties:

[0059] For the case of steam turbines that emit steam to the outside, the available energy of this part of steam is rarely converted into electrical energy, but is converted into mechanical energy or thermal energy on the steam-using side. It should be deducted in proportion to the available energy loss. The deduction ratio ε is:

[0060] ε=δβ

[0061]

[0062] Among them, δ is the ratio of available energy loss; G qj h is the steam flow rate of the steam turbine to supply external steam; qj Enthalpy of steam supplied by steam turbine to the outside; T 0 is the Kelvin temperature corresponding to the highest temperature in summer, which can be 313.15K; T qj G is the Kelvin temperature corresponding to the external high-parameter power steam temperature; g is the steam output of the boiler; h g is the steam enthalpy at boiler outlet; T g is the Kelvin temperature corresponding to the boiler outlet steam temperature.

[0063] S7. Bring the unit load to the middle load and the minimum load within the actual operating range, repeat steps S4 to S6, and calculate the power consumption rate of the production plant at the middle load and the minimum load within the actual operating range.

[0064] Embodiment 2:

[0065] This embodiment provides a system for calculating the power consumption rate of an industrial steam supply self-contained power plant, including:

[0066] The data acquisition module is configured to: obtain the power consumption, power generation and power generation of non-host equipment of the self-provided power plant;

[0067] The power consumption adjustment module of the production plant is configured to adjust the power consumption of the production plant by deducting the additional power consumption of the equipment caused by the direct supply of steam by the boiler, and by deducting the power consumption of the production plant according to the apportionment of the available energy loss by the steam turbine supplying steam to the outside;

[0068] The production plant power consumption rate determination module is configured to determine the production plant power consumption rate by the ratio of the production plant power consumption to the sum of the power generation and the power generation of non-host equipment.

[0069] The working method of the system is the same as the method for calculating the power consumption rate of the industrial steam supply self-contained power plant in Example 1, and will not be repeated here.

[0070] Embodiment 3:

[0071] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the method for calculating the power consumption rate of an industrial steam supply self-contained power plant described in Example 1 are implemented.

[0072] Embodiment 4:

[0073] This embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor executes the program, the steps of the method for calculating the power consumption rate of an industrial steam supply self-contained power plant described in Example 1 are implemented.

[0074] Embodiment 5:

[0075] This embodiment provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the method for calculating the power consumption rate of an industrial steam supply self-contained power plant described in Example 1 are implemented.

[0076] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A method for calculating the power consumption rate of an industrial steam supply self-contained power plant, characterized in that: include: Obtain the power consumption, power generation and power generation of non-host equipment of the self-provided power plant; The deduction ratio of the additional power consumption of the equipment caused by the direct supply of steam from the boiler to the outside, and the deduction ratio of the available energy loss apportioned by the steam turbine to the outside to adjust the power consumption of the production plant; The power consumption rate of the production plant is determined by the ratio of the power consumption of the production plant to the sum of the power generation and the power generation of non-host equipment.

2. The method for calculating the power consumption rate of an industrial steam supply self-contained power plant according to claim 1, characterized in that: The power consumption rate L of the production plant is: Among them, λ is the deduction ratio of the additional power consumption of the equipment caused by the direct supply of steam from the boiler to the outside; ε is the deduction ratio of the steam supply from the turbine to the outside according to the available energy loss; W h is the electricity consumption of the production plant; W f is the power generation; W zj Power generation for non-host equipment.

3. The method for calculating the power consumption rate of an industrial steam supply self-contained power plant according to claim 1, characterized in that: The deduction ratio for the additional increase in plant electricity consumption caused by the direct supply of steam to the outside by the boiler is equal to the product of the ratio of the direct supply of steam to the outside by the boiler and the steam production of the boiler, and the ratio of the power consumption of the boiler system to the total plant electricity consumption.

4. The method for calculating the power consumption rate of an industrial steam supply self-contained power plant according to claim 1, characterized in that: The deduction ratio of the available energy loss apportioned to the external steam supply of the steam turbine is equal to the product of the available energy loss ratio and the proportion of the boiler system's power consumption in the total plant power consumption.

5. The method for calculating the power consumption rate of an industrial steam supply self-contained power plant according to claim 4, characterized in that: The available energy loss ratio δ is: Among them, G qj h is the steam flow rate of the steam turbine to supply external steam; qj The enthalpy value of the steam turbine supplying steam to the outside; T0 is the Kelvin temperature corresponding to the maximum temperature; T qj G is the Kelvin temperature corresponding to the external high-parameter power steam temperature; g is the steam output of the boiler; h g is the steam enthalpy at boiler outlet; T g is the Kelvin temperature corresponding to the boiler outlet steam temperature.

6. The method for calculating the power consumption rate of an industrial steam supply self-contained power plant according to claim 1, characterized in that: The power consumption of the production plant is calculated by using the power meter at the high-voltage transformer substation and the sum of the power consumption of each auxiliary equipment. If the deviation between the power meter at the high-voltage transformer substation and the sum of the power consumption of each auxiliary equipment is less than or equal to the preset percentage, the power consumption of the production plant shall be the power meter at the high-voltage transformer substation; otherwise, the power consumption of the production plant shall be the preset multiple of the sum of the power consumption of each auxiliary equipment.

7. An industrial steam supply self-contained power plant production plant power consumption rate accounting system, characterized in that: include: The data collection module is configured to: obtain the power consumption, power generation and power to be increased of the self-provided power plant; The power consumption adjustment module of the production plant is configured to adjust the power consumption of the production plant by deducting the additional power consumption of the equipment caused by the direct supply of steam by the boiler, and by deducting the power consumption of the production plant according to the apportionment of the available energy loss by the steam turbine supplying steam to the outside; The production plant power consumption rate determination module is configured to determine the production plant power consumption rate by the ratio of the production plant power consumption to the sum of the power generation and the power generation of non-host equipment.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method for calculating the power consumption rate of an industrial steam supply self-contained power plant as described in any one of claims 1 to 6 are implemented.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that: When the processor executes the program, the steps of the method for calculating the power consumption rate of an industrial steam supply self-contained power plant as described in any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of the method for calculating the power consumption rate of an industrial steam supply self-contained power plant according to any one of claims 1 to 6 are implemented.

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