Analysis Method and System for Cement Enterprises' Multi-path Power Supply System to Achieve Zero Power Purchase

Abstract

The present invention discloses an analysis method and system for achieving zero electricity purchase in a multi-path power supply system of a cement enterprise, belonging to the technical field of energy conservation and environmental protection, including: S1, obtaining the basic information of the cement enterprise, and calculating the total power consumption and waste heat power generation of the cement enterprise within the time period t according to the basic information; S2, calculating the green power gap according to the total power consumption and waste heat power generation; S3, through the power balance analysis of the cement enterprise, obtaining the power load demand and external purchase load demand of the cement enterprise under different typical operating states; S4, constructing a typical load curve of the cement enterprise.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy conservation and environmental protection, and particularly relates to an analysis method and system for achieving zero electricity purchase in a multi-path power supply system of a cement enterprise. Background Art

[0002] The "zero electricity purchase" implementation plan for a cement enterprise refers to the use of multiple new energy power generation methods such as waste heat, wind power, and solar energy during the operation of the cement enterprise, combined with reasonable peak-valley regulation within the enterprise, to ultimately achieve the goal of "zero external electricity purchase for total electricity consumption" where the green electricity generation is balanced with the factory electricity consumption within one year.

[0003] Currently, there is no complete and systematic scientific analysis method for the "zero electricity purchase" implementation plan of cement enterprises.

[0004] The technical fields related to the "zero electricity purchase" implementation plan of cement enterprises include: calculation of the comprehensive power consumption of cement enterprises, calculation of the electricity generated by wind and solar power generation, and assessment of power balance. The relationships among these three aspects are in a fragmented state and cannot form a complete calculation chain, thus making it impossible to clearly evaluate the "zero electricity purchase" implementation plan.

[0005] Today, when promoting industrial greenization, the goal of "zero external electricity purchase for total electricity consumption" in cement factories is of great significance. However, if only the offset between the total electricity consumption and total electricity generation in a single operating state is considered, it often does not fully meet the actual operating needs of the factory. Therefore, it is necessary to introduce the operating conditions of various typical operating states of the cement factory as the calculation background. At the same time, not only power consumption balance calculation is required, but also power balance calculation is needed to verify whether the available installed capacity can meet the peak power load demand. The above is also the main research content of this article. Summary of the Invention

[0006] In order to solve the technical problems existing in the known technology, the present invention provides an analysis method and system for achieving zero electricity purchase in a multi-path power supply system of a cement enterprise, which solves the problems of incoherence and unsystematicness in the relevant analysis methods of the "zero electricity purchase" implementation plan of cement enterprises and the inability to intuitively determine the energy conservation and emission reduction effects brought by new energy power generation to the enterprise.

[0007] The first object of the present invention is to provide an analysis method for achieving zero electricity purchase in a multi-path power supply system of a cement enterprise, including:

[0008] S1. Obtain the basic information of the cement enterprise, and calculate the total power consumption and waste heat power generation of the cement enterprise within the time period t according to the basic information;

[0009] S2. Calculate the green electricity gap according to the total power consumption and waste heat power generation; Green electricity mainly includes photovoltaic power generation and wind power generation;

[0010] The annual power generation of photovoltaic power generation can be calculated by the following formula:

[0011] E pv = IK E (1 - K s )A p

[0012] Where;

[0013] E pv ——Annual power generation of the photovoltaic system (kWh);

[0014] I——Annual solar irradiance on the surface of the photovoltaic cell (kWh / m 2 );

[0015] K E ——Conversion efficiency of the photovoltaic cell (%);

[0016] K s ——Loss efficiency of the photovoltaic system (%);

[0017] A p ——Net area of the photovoltaic panel of the photovoltaic system (m 2 ). Among them, according to the actual or planned situation of the cement plant, considering the available spaces such as building roofs, open spaces, and green belts, and integrating a certain utilization coefficient, the laying area of the photovoltaic panel is obtained. At the same time, based on the meteorological accumulation data in recent years in the local area, the annual solar irradiance on the surface of the photovoltaic cell is obtained.

[0018] The annual power generation of wind power can be calculated according to the following formula:

[0019]

[0020] Where;

[0021] E wt ——Annual power generation of the wind turbine (kWh);

[0022] ρ——Air density, taking 1.225 kg / m 3 ;

[0023] C R (z)——Roughness coefficient calculated according to height;

[0024] V0——Annual available average wind speed (m / s);

[0025] A w ——Windward area of the fan blade (m 2 );

[0026] K et ——Conversion efficiency of the wind turbine.

[0027] The correlation coefficient and wind speed need to be comprehensively considered according to local meteorological conditions.

[0028] Since the investment and construction cycle of wind power generation is relatively long, photovoltaic power generation technology should be preferentially selected. Under the condition of economic feasibility, photovoltaic power generation should be built as much as possible. For the remaining insufficient power, the wind power generation amount should be calculated according to the local actual situation.

[0029] Finally, through the comprehensive balance of the power generation amounts of several clean energy sources such as waste heat power generation, photovoltaic power generation, and wind power generation, the annual total power gap is filled.

[0030] S3. Through the power balance analysis of cement enterprises, the power load demand and the purchased power load demand of cement enterprises under different typical operating conditions are obtained; specifically, the following four typical operating conditions are included:

[0031] During the daytime operating condition, calculate whether the peak load demand of the cement enterprise can be met when waste heat power generation, wind power generation, and photovoltaic power generation work simultaneously. If not, calculate the size of the purchased power load gap.

[0032] During the nighttime operating condition, calculate whether the peak load demand of the cement enterprise can be met when waste heat power generation and wind power generation work simultaneously. If not, calculate the size of the purchased power load gap.

[0033] During the daily maintenance condition of the waste heat boiler, calculate whether the peak load demand of the cement enterprise can be met when wind power generation and photovoltaic power generation work simultaneously. If not, calculate the size of the purchased power load gap.

[0034] During the nighttime maintenance condition of the waste heat boiler, calculate whether the peak load demand of the cement enterprise can be met when only wind power generation is working. If not, calculate the size of the purchased power load gap.

[0035] S4. Construct the typical load curve of the cement enterprise: According to the operating load per hour, the available installed capacity of waste heat power generation and green power generation, and the local meteorological conditions, calculate the purchased power or exported power situation per hour, and draw the load curve.

[0036] Preferably, the basic information includes the basic power consumption information and the basic waste heat power generation information; among them: the basic power consumption information includes: the number of operating days, the clinker production capacity, the cement production capacity, the comprehensive specific power consumption per ton of clinker, the comprehensive specific power consumption per ton of cement, and the annual power consumption of the mine; the basic waste heat power generation information includes the power generation per ton of clinker and the self-use rate of power generation.

[0037] Preferably, S4 is specifically:

[0038] S41. Construct the typical daily load curve for the normal operation state of the whole plant, and make load adjustments according to the electricity price.

[0039] S42. Construct a typical plant-wide maintenance load curve for the situation where all production lines are shut down for maintenance and the waste heat power generation unit is disconnected from the grid.

[0040] The second object of the present invention is to provide an analysis system for achieving zero power purchase in a multi-path power supply system of a cement enterprise, including:

[0041] Basic information processing module: Obtain the basic information of the cement enterprise, and calculate the total power consumption and waste heat power generation of the cement enterprise within the time period t according to the basic information.

[0042] Gap calculation module: Calculate the green power gap according to the total power consumption and waste heat power generation; green power includes photovoltaic power generation and wind power generation.

[0043] Gap analysis module: Through the power balance analysis of the cement enterprise, obtain the power load demand and external power purchase load demand of the cement enterprise under different typical operating states; specifically include the following four typical operating states:

[0044] Daytime operating state: Calculate whether it can meet the peak load demand of the cement enterprise when waste heat power generation, wind power generation, and photovoltaic power generation work simultaneously. If not, calculate the size of the external power purchase load gap.

[0045] Nighttime operating state: Calculate whether it can meet the peak load demand of the cement enterprise when waste heat power generation and wind power generation work simultaneously. If not, calculate the size of the external power purchase load gap.

[0046] Waste heat boiler daily maintenance state: Calculate whether it can meet the peak load demand of the cement enterprise when wind power generation and photovoltaic power generation work simultaneously. If not, calculate the size of the external power purchase load gap.

[0047] Waste heat boiler night maintenance state: Calculate whether it can meet the peak load demand of the cement enterprise when only wind power generation is working. If not, calculate the size of the external power purchase load gap.

[0048] Curve construction module: Construct a typical load curve of the cement enterprise: Calculate the external power purchase or external power supply situation per hour according to the operating load per hour, the available installed capacity of waste heat power generation and green power generation, and the local meteorological conditions, and draw the load curve.

[0049] Preferably, the basic information includes power consumption basic information and waste heat power generation basic information; among them: the power consumption basic information includes: number of operating days, clinker production capacity, cement production capacity, comprehensive clinker power consumption per ton, comprehensive cement power consumption per ton, annual power consumption of the mine; the waste heat power generation basic information includes clinker power generation per ton and power generation self-use rate.

[0050] Preferably, the construction process of the curve construction module is as follows:

[0051] S41. Construct a typical daily load curve for the normal operation of the whole plant and adjust the load according to the electricity price.

[0052] S42. Construct a typical overhaul load curve for the whole plant for the situation where all production lines are shut down for overhaul and the waste heat power generation units are disconnected from the grid.

[0053] The third object of the present invention is to provide an information data processing terminal for implementing the analysis method for achieving zero power purchase in the multi-path power supply system of a cement enterprise as described above.

[0054] The fourth object of the present invention is to provide a computer-readable storage medium including instructions, which when running on a computer, cause the computer to execute the analysis method for achieving zero power purchase in the multi-path power supply system of a cement enterprise as described above.

[0055] The advantages and positive effects of the present invention are:

[0056] The present invention solves the problems of incoherence and unsystematicness in the relevant analysis methods for the "zero power purchase" implementation plan of cement enterprises, and the inability to intuitively determine the energy conservation and emission reduction effects brought by new energy power generation to enterprises. Brief Description of the Drawings

[0057] Figure 1 It is the typical daily load curve graph and the typical overhaul curve graph for the whole plant of this application. Detailed Embodiments

[0058] In order to further understand the content, features and effects of the present invention, the following embodiments are cited and described in detail in conjunction with the accompanying drawings:

[0059] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the technical solutions in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0060] Please refer to Figure 1 .

[0061] An analysis method for a multi-path power supply system of a cement enterprise to achieve zero power purchase includes:

[0062] S1. Calculate the comprehensive power consumption of the cement enterprise. The specific steps include:

[0063] S11. Fill in the basic information of the production lines of the cement enterprise, including: number of operating days, clinker production capacity, cement production capacity, comprehensive power consumption per ton of clinker, comprehensive power consumption per ton of cement, annual power consumption of the mine (if any), etc. The program automatically calculates the total annual power consumption of the production line.

[0064] S12. Fill in the power generation per ton of clinker and the self-use rate of power generation. The program automatically calculates the annual waste heat power generation of the production line.

[0065] Table 1. Calculation table of the comprehensive power consumption of the cement plant

[0066]

[0067] S2. Conduct a power balance calculation for the cement enterprise. In this step, it is necessary to fill in the total annual power consumption of the production line and the annual waste heat power generation, and based on the green power generation gap, make a preliminary plan for the annual wind power generation and photovoltaic power generation, so as to obtain the annual wind power generation and the annual photovoltaic power generation. The program automatically calculates the annual power profit and loss to judge whether "total power with zero external power purchase" is established.

[0068] The annual power generation of photovoltaic power generation can be calculated according to the following formula:

[0069] E pv =K E (1 - K s ) p

[0070] In the formula;

[0071] E pv —— Annual power generation of the photovoltaic system (kWh);

[0072] I—— Annual solar radiation irradiance on the surface of the photovoltaic cell (kWh / m 2 )

[0073] K E —— Conversion efficiency of the photovoltaic cell (%)

[0074] K s —— Loss efficiency of the photovoltaic system (%)

[0075] A p —— Net area of the photovoltaic panel of the photovoltaic system (m 2 )). Among them, according to the actual or planned situation of the cement plant, considering the available spaces such as building roofs, open spaces, and green belts, and integrating a certain utilization coefficient, the laying area of the photovoltaic panel is obtained. At the same time, based on the meteorological accumulation data in recent years in the local area, the annual solar radiation irradiance on the surface of the photovoltaic cell is obtained.

[0076] The annual power generation of wind power generation can be calculated according to the following formula:

[0077]

[0078] In the formula;

[0079] E wt —— Annual power generation of the wind turbine (kWh)

[0080] ρ—the air density, taken as 1.225 kg / m 3 ;

[0081] C R (z) — the roughness coefficient calculated according to the height;

[0082] V0—the annual average available wind speed (m / s);

[0083] A w — the windward area of the fan blade (m 2 );

[0084] K wt — the conversion efficiency of the wind power generation unit.

[0085] The correlation coefficient and wind speed need to be comprehensively considered according to the local meteorological conditions.

[0086] Since the investment and construction cycle of wind power generation are relatively long, the photovoltaic power generation technology should be preferentially selected. Under the condition of economic feasibility, the photovoltaic power generation should be built as much as possible. For the remaining insufficient power, the wind power generation amount should be measured according to the local actual situation.

[0087] Table 2 is the power balance calculation result table of the cement plant

[0088] Power balance Unit: 10,000 kWh Serial number Project 1 Total power consumption in the plant area 14789.95 4 Power generation from waste heat 5277.44 5 Power generation from biomass 0.00 6 Power generation from wind power 9359.35 7 Power generation from photovoltaic installation 881.27 9 Power profit and loss 728.11

[0089] S3. Conduct the power balance calculation of the cement enterprise, and the power load demand and external purchase load demand under different typical operating states of the cement plant can be obtained. It is divided into the following four typical operating states. It is necessary to fill in the calculated load of the production line, the installed capacity of waste heat power generation, the installed capacity of wind power generation, and the installed capacity of photovoltaic power generation.

[0090] S31. Daytime operating state, automatically calculate whether it can meet the peak load demand of the cement enterprise when waste heat, wind power, and photovoltaic power generation work simultaneously. If not, what is the external power purchase load gap.

[0091] S32. Nighttime operating state, automatically calculate whether it can meet the peak load demand of the cement enterprise when waste heat and wind power generation work simultaneously. If not, what is the external power purchase load gap.

[0092] S33. Daytime maintenance state of the waste heat boiler, automatically calculate whether it can meet the peak load demand of the cement enterprise when wind power and photovoltaic power generation work simultaneously. If not, what is the external power purchase load gap.

[0093] S34. Nighttime maintenance state of the waste heat boiler, automatically calculate whether it can meet the peak load demand of the cement enterprise when only wind power generation works. If not, what is the external power purchase load gap.

[0094] Table 3 is the power balance calculation table of the cement plant

[0095]

[0096] S4. Form the typical load curve of the cement enterprise. It is necessary to input the operating load per hour within 24 hours of the whole day, the available installed capacity of waste heat and wind-solar power generation, and the local meteorological conditions. The program can calculate the purchased electricity or exported electricity per hour and draw an intuitive load curve graph

[0097] S41. Form the typical daily load curve. This situation applies to the normal operation state of the whole plant, and the load is adjusted according to the electricity price. For example, the electricity price is at a high level between 14:00 and 22:00 in the afternoon, and the cement grinding system is shut down at this time

[0098] S42. Form the typical load curve of the whole plant during maintenance. This situation applies to the situation where all production lines are shut down for maintenance and the waste heat power generation unit is disconnected

[0099] Through the calculation results and chart products of steps S2, S3, and S4, it can be clearly known whether "total electricity with zero purchased electricity" is established, the relationship between the available new energy installed capacity and the peak load of the cement enterprise, and the load curve state of the cement enterprise in 24 hours under the supply of new energy power generation. These three aspects complement each other, and can intuitively evaluate the annual macro state of energy consumption and supply of the cement enterprise and the instantaneous micro load demand state

[0100] An analysis system for a multi-path power supply system of a cement enterprise to achieve zero power purchase, including:

[0101] Basic information processing module: Calculate the comprehensive power consumption of the cement enterprise. The specific steps include:

[0102] Fill in the basic information of the production line of the cement enterprise, including: number of operating days, clinker production capacity, cement production capacity, comprehensive power consumption per ton of clinker, comprehensive power consumption per ton of cement, annual electricity consumption of the mine (if any), etc. The program automatically calculates the total annual electricity consumption of the production line

[0103] Fill in the power generation per ton of clinker and the self-use rate of power generation. The program automatically calculates the annual waste heat power generation of the production line

[0104] Gap calculation module: Conduct the power balance calculation of the cement enterprise. In this step, it is necessary to fill in the total annual electricity consumption of the production line and the annual waste heat power generation. According to the green power generation gap, make a preliminary plan for the annual wind power generation and photovoltaic power generation, so as to obtain the annual wind power generation and the annual photovoltaic power generation. The program automatically calculates the annual electricity profit and loss to judge whether "total electricity with zero purchased electricity" is established

[0105] Gap analysis module: Conduct power balance calculations for cement enterprises, and obtain the power load demand and purchased load demand under different typical operating states of cement plants. It is divided into the following four typical operating states. It is necessary to fill in the calculated load of the production line, the installed capacity of waste heat power generation, the installed capacity of wind power generation, and the installed capacity of photovoltaic power generation.

[0106] S31. Daytime operating state, automatically calculate whether it can meet the peak load demand of cement enterprises when waste heat, wind power, and photovoltaic power are working simultaneously. If not, what is the gap in the purchased electricity load?

[0107] S32. Nighttime operating state, automatically calculate whether it can meet the peak load demand of cement enterprises when waste heat and wind power are working simultaneously. If not, what is the gap in the purchased electricity load?

[0108] S33. Daytime maintenance state of the waste heat boiler, automatically calculate whether it can meet the peak load demand of cement enterprises when wind power and photovoltaic power are working simultaneously. If not, what is the gap in the purchased electricity load?

[0109] S34. Nighttime maintenance state of the waste heat boiler, automatically calculate whether it can meet the peak load demand of cement enterprises when only wind power is working. If not, what is the gap in the purchased electricity load?

[0110] Curve construction module: Form the typical load curve of cement enterprises. It is necessary to input the operating load per hour within 24 hours of the whole day. According to the available installed capacity of waste heat and wind-solar power generation and the local meteorological conditions, the program can calculate the purchased electricity or exported electricity per hour and draw an intuitive load curve graph.

[0111] S41. Form the typical daily load curve. This situation applies to the normal operating state of the whole plant, and the load is adjusted according to the electricity price. For example, the electricity price is at a high level between 14:00 and 22:00 in the afternoon, and the cement mill system is shut down at this time.

[0112] S42. Form the typical load curve for the whole plant during maintenance. This situation applies to the situation where all production lines are shut down for maintenance and the waste heat power generation unit is disconnected.

[0113] Through the calculation results and chart products of steps S2, S3, and S4, it can be clearly known whether "total electricity with zero purchased electricity" holds, the relationship between the available new energy installed capacity and the peak load of cement enterprises, and the load curve state of cement enterprises within 24 hours under the supply of new energy power generation. These three aspects complement each other, and can intuitively evaluate the annual macro state of energy consumption and supply of cement enterprises and the instantaneous micro load demand state.

[0114] An information data processing terminal is used to implement the analysis method for achieving zero power purchase in the multi-path power supply system of the above-mentioned cement enterprises.

[0115] A computer-readable storage medium includes instructions that, when run on a computer, cause the computer to execute the above-mentioned analysis method for a cement enterprise multi-path power supply system to achieve zero power purchase.

[0116] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in whole or in part in the form of a computer program product, the computer program product includes one or more computer instructions. When the computer program instructions are loaded or executed on a computer, the processes or functions described in the embodiments of the present invention are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that the computer can access or a data storage device such as a server or data center that includes one or more integrated available media. The available medium may be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid-state disk (SSD)).

[0117] The above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. An analysis method for a multi-path power supply system of a cement enterprise to achieve zero electricity purchase, characterized in that, Including: S1. Obtain the basic information of the cement enterprise, and calculate the total power consumption and waste heat power generation of the cement enterprise within the time period t according to the basic information; S2. Calculate the green power gap according to the total power consumption and waste heat power generation; green power includes photovoltaic power generation and wind power generation; where: The annual power generation of photovoltaic power generation is calculated according to the following formula: E pv = IK E (1 - K s )A p In the formula: E pv represents the annual power generation of the photovoltaic system; I represents the annual solar irradiance on the surface of the photovoltaic cell; K E represents the conversion efficiency of the photovoltaic cell; K s represents the loss efficiency of the photovoltaic system; A p represents the net area of the photovoltaic panels of the photovoltaic system; The annual power generation of wind power generation is calculated according to the following formula: In the formula: E wt represents the annual power generation of the wind turbine; ρ represents the air density; C R (z) represents the roughness coefficient calculated according to the height; V0 represents the average annual available wind speed; A w represents the windward area of the fan blade; K wt represents the conversion efficiency of the wind turbine; Finally, through the comprehensive balance of waste heat power generation, photovoltaic power generation, and wind power generation, make up the total annual power gap; S3. Through the power balance analysis of the cement enterprise, obtain the power load demand and external purchase load demand of the cement enterprise under different typical operating states; specifically including the following four typical operating states: During the day operating state, calculate whether it can meet the peak load demand of the cement enterprise when waste heat power generation, wind power generation, and photovoltaic power generation work simultaneously. If not, calculate the size of the external power purchase load gap; During the night operating state, calculate whether it can meet the peak load demand of the cement enterprise when waste heat power generation and wind power generation work simultaneously. If not, calculate the size of the external power purchase load gap; During the daily maintenance state of the waste heat boiler, calculate whether it can meet the peak load demand of the cement enterprise when wind power generation and photovoltaic power generation work simultaneously. If not, calculate the size of the external power purchase load gap; During the night maintenance state of the waste heat boiler, calculate whether it can meet the peak load demand of the cement enterprise when only wind power generation is working. If not, calculate the size of the external power purchase load gap; S4. Construct a typical load curve of the cement enterprise: According to the operating load per hour, the available installed capacity of waste heat power generation and green power generation, and the local meteorological conditions, calculate the external power purchase or external power supply situation per hour, and draw the load curve.

2. The analysis method for achieving zero electricity purchase in the multi-path power supply system of a cement enterprise according to claim 1, characterized in that The basic information includes power consumption basic information and waste heat power generation basic information; where: the power consumption basic information includes: number of operating days, clinker production capacity, cement production capacity, comprehensive clinker power consumption per ton, comprehensive cement power consumption per ton, annual power consumption of the mine; the waste heat power generation basic information includes power generation per ton of clinker and self-use rate of power generation.

3. The analysis method for achieving zero electricity purchase in the multi-path power supply system of cement enterprises according to claim 1, characterized in that, S4 is specifically: S41. Construct a typical daily load curve for the normal operation state of the whole plant, and make load adjustments according to the electricity price; S42. Construct a typical load curve for the whole plant maintenance, which is used for the situation where all production lines are shut down for maintenance and the waste heat power generation unit is disconnected.

4. An analysis system for achieving zero power purchase in a multi-path power supply system of a cement enterprise, characterized in that, Including: Basic information processing module: Obtain the basic information of the cement enterprise, and calculate the total power consumption and waste heat power generation of the cement enterprise within the time period t according to the basic information; Gap calculation module: Calculate the green power gap according to the total power consumption and waste heat power generation; green power includes photovoltaic power generation and wind power generation; Gap analysis module: Through the power balance analysis of the cement enterprise, obtain the power load demand and external purchase load demand of the cement enterprise under different typical operating states; specifically including the following four typical operating states: During the day operating state, calculate whether it can meet the peak load demand of the cement enterprise when waste heat power generation, wind power generation, and photovoltaic power generation work simultaneously. If not, calculate the size of the external power purchase load gap; Night operating status: Calculate whether it can meet the peak load demand of the cement enterprise when waste heat power generation and wind power generation work simultaneously. If not, calculate the size of the external power purchase load gap. Day maintenance status of the waste heat boiler: Calculate whether it can meet the peak load demand of the cement enterprise when wind power generation and photovoltaic power generation work simultaneously. If not, calculate the size of the external power purchase load gap. Night maintenance status of the waste heat boiler: Calculate whether it can meet the peak load demand of the cement enterprise when only wind power generation is working. If not, calculate the size of the external power purchase load gap. Curve construction module: Construct the typical load curve of the cement enterprise: Calculate the external power purchase or power transmission situation per hour based on the operating load per hour, the available installed capacity of waste heat power generation and green power generation, and the local meteorological conditions, and draw the load curve.

5. The analysis system for achieving zero electricity purchase in the multi-path power supply system of cement enterprises according to claim 4, wherein, The basic information includes basic power consumption information and basic waste heat power generation information; among them: the basic power consumption information includes: number of operating days, clinker production capacity, cement production capacity, comprehensive power consumption per ton of clinker, comprehensive power consumption per ton of cement, annual power consumption of the mine; the basic waste heat power generation information includes power generation per ton of clinker and self-use rate of power generation.

6. The analysis system for achieving zero power purchase in the multi-path power supply system of a cement enterprise according to claim 5, characterized in that, The construction process of the curve construction module is as follows: S41. Construct a typical daily load curve for the normal operation state of the whole plant and make load adjustments according to the electricity price. S42. Construct a typical load curve for the whole plant during maintenance for the situation where all production lines are shut down for maintenance and the waste heat power generation unit is disconnected.

7. An information data processing terminal, characterized in that, It is used to implement the analysis method for achieving zero power purchase of the multi-path power supply system of the cement enterprise described in any one of claims 1 to 3.

8. A computer-readable storage medium, characterized in that, It includes instructions that, when running on a computer, cause the computer to execute the analysis method for achieving zero power purchase of the multi-path power supply system of the cement enterprise described in any one of claims 1 to 3.

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