Online fuel consumption acquisition method for diesel-storage hybrid power system for oil and gas exploitation

Abstract

The invention discloses a fuel consumption online acquisition method for a diesel-storage hybrid power system for oil and gas exploitation, which comprises the following steps: S100, establishing a function relationship between fuel consumption and power according to a power and fuel consumption curve of a diesel generator; s200, the total oil consumption before energy storage access is obtained through the function relation between the oil consumption and the power; and S300, obtaining the total oil consumption after energy storage access by using the function relationship between the oil consumption and the power, comprising the following steps: S400, comparing the total oil consumption of the diesel generator before energy storage access with the total oil consumption of the diesel generator after energy storage access to obtain a fuel oil consumption result of the diesel-storage hybrid power system for oil and gas exploitation. Based on the real-time online data in the operation process, the accuracy and the real-time performance of acquiring the fuel consumption data of the diesel-storage hybrid power system for oil and gas exploitation can be greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil and gas production diesel storage hybrid system, and in particular relates to an online acquisition method for fuel consumption of an oil and gas production diesel storage hybrid system. Background Art

[0002] As oil and gas resources become increasingly scarce, improving extraction efficiency and reducing energy consumption have become important goals for the oil and gas industry. As an advanced power solution, diesel-storage hybrid systems have been widely used in oil and gas extraction. However, how to accurately and real-time obtain the system's fuel consumption data and optimize management based on it is still a major challenge facing the industry.

[0003] The efficiency of a diesel generator set is related to the load rate. Generally speaking, the higher the load rate, the higher the oil-to-electricity conversion efficiency. In actual use, due to the random changes in load, there is a common working condition of a big horse pulling a small cart, which leads to low overall efficiency of diesel generators and serious waste of diesel. The electrochemical energy storage system can be used as both a power source and a load, forming a microgrid with a diesel generator, which can adjust the load rate of the diesel generator, thereby improving the oil-to-electricity conversion efficiency and achieving the purpose of saving diesel. The economic benefits of the diesel storage system mainly depend on the amount of fuel saved, but due to the lack of an effective measurement method, it is not easy to obtain the actual fuel saving effect.

[0004] At present, the fuel saving effect is mostly obtained through experimental comparison methods and theoretical calculations. Due to the constant changes in the environment and load, there is a large discrepancy between the operating conditions and the test conditions. Theoretical calculations are based on historical data and require approximate processing of information such as power and fuel consumption during the research period, which has a large deviation problem. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a method for online acquisition of fuel consumption of an oil and gas production diesel storage hybrid system. The present invention is based on real-time online data during operation, which can greatly improve the accuracy and real-time performance of acquiring fuel consumption data of the oil and gas production diesel storage hybrid system.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a method for online acquisition of fuel consumption of an oil and gas production diesel storage hybrid system, comprising the steps of:

[0007] S100, establishing a functional relationship between fuel consumption and power according to the power and fuel consumption curve of the diesel generator;

[0008] S200, using the functional relationship between fuel consumption and power to obtain the total fuel consumption before energy storage is connected, including the steps of:

[0009] S201, obtaining the diesel generator working fuel consumption before energy storage is connected;

[0010] S202, obtaining the fuel consumption of the diesel generator starting before the energy storage is connected;

[0011] S203, adding the diesel generator working fuel consumption before the energy storage is connected and the diesel generator starting fuel consumption before the energy storage is connected to obtain the total fuel consumption of the diesel generator before the energy storage is connected;

[0012] S300, using the functional relationship between fuel consumption and power, obtaining the total fuel consumption after energy storage is connected, including the steps of:

[0013] S301, obtaining the diesel generator working fuel consumption after energy storage is connected;

[0014] S302, obtaining the fuel consumption of the diesel generator after the energy storage is connected;

[0015] S303, adding the working fuel consumption of the diesel generator after the energy storage is connected and the starting fuel consumption of the diesel generator after the energy storage is connected to obtain the total fuel consumption of the diesel generator after the energy storage is connected;

[0016] S400, compare the total fuel consumption of the diesel generator before the energy storage is connected and the total fuel consumption of the diesel generator after the energy storage is connected, and obtain the fuel consumption result of the oil and gas production diesel storage hybrid system.

[0017] Furthermore, according to the power and fuel consumption curve of the diesel generator, a corresponding functional relationship between power and fuel consumption rate is established, which is a piecewise function:

[0018]

[0019] Where n is the total number of stages, (a k ,a k+1 ) is the range of the independent variable of each stage function, y k (k=1,2,…,n) is the function expression of the corresponding stage;

[0020] To obtain each point y k The function expression of is used, and the fuel consumption value corresponding to the power is obtained by piecewise linear interpolation.

[0021] Furthermore, let the power at time t be P(t), when P(t)∈(a k ,a k+1 ), the fuel consumption value is obtained by linear interpolation:

[0022]

[0023] Furthermore, the diesel generator fuel consumption before energy storage is connected is obtained, including:

[0024] The total load power at time t is P(t), and the number of diesel generators in operation is N(t). Indicates the power of each working diesel generator. According to the relationship between power and fuel consumption, power The corresponding fuel consumption is Therefore, the fuel consumption required for a diesel generator to work for 1 second at time t is calculated as:

[0025]

[0026] The total fuel consumption required for N(t) diesel generators to work for 1 second at time t is:

[0027]

[0028] Then the total diesel generator fuel consumption in the time period [0, T] is:

[0029]

[0030] Furthermore, the fuel consumption of the diesel generator startup before the energy storage is connected is obtained, including:

[0031] The diesel generator startup is the process from receiving the startup command to loading. Since the number of startups of the jth diesel generator in the [0, T] time period is θ j , the number of starts of n diesel generators is Each start-up time is τ seconds, and the fuel consumption is C liters per hour. The fuel consumption of a single diesel generator when started once is: Then the total diesel generator starting fuel consumption in the [0,T] time period is:

[0032]

[0033] Furthermore, the fuel consumption of diesel generators after energy storage access includes:

[0034] The power provided by the energy storage at time t after the energy storage is connected is I(t), where a positive I(t) indicates discharge and a negative I(t) indicates charging. The total load power at time t is P(t), and the power provided by the diesel generator is P(t)-I(t). The number of diesel generators working at time t is M(t).

[0035] At time t, the working state of the jth diesel generator is M j (t), M j (t)=1 means it is in working state, M j (t) = 0 indicates the stop state; then:

[0036] After the energy storage is connected, the output power of each diesel generator at time t is Corresponding fuel consumption The total fuel consumption of the diesel generator for 1 second at time t is:

[0037]

[0038] Then the total diesel generator fuel consumption in the time period [0, T] is:

[0039]

[0040] Furthermore, the fuel consumption of diesel generator startup after energy storage access includes:

[0041] After energy storage is connected, the number of startups of the jth diesel generator t∈[0,T]λ j , the number of starts among n diesel generators is Each start-up time is τ seconds, and the fuel consumption is C liters per hour. The fuel consumption of a single diesel generator is:

[0042] Then the fuel consumption of starting the diesel generator after energy storage is connected is:

[0043]

[0044] Furthermore, by comparing the total fuel consumption of the diesel generator before and after the energy storage is connected, the fuel consumption results of the oil and gas production diesel storage hybrid system are obtained, including:

[0045] Fuel saving rate:

[0046]

[0047] The total fuel consumption before the diesel generator is connected is O, which is the sum of the diesel generator's operating fuel consumption and starting fuel consumption: O = O f +O s ;

[0048] The total fuel consumption after energy storage is connected is O', which is the sum of the diesel generator's operating fuel consumption and starting fuel consumption after energy storage is connected: O' = O' f +O' s .

[0049] The beneficial effects of adopting this technical solution are:

[0050] The present invention establishes a real-time online power and fuel consumption calculation method based on the relationship between power consumption and fuel consumption of the oil and gas production diesel storage hybrid system. Based on the real-time online data during operation, the diesel consumption before and after energy storage access is obtained, and the fuel consumption and fuel saving efficiency can be obtained in real time, which can greatly improve the fuel consumption accuracy and real-time performance of the oil and gas production diesel storage hybrid system, and improve the fuel consumption evaluation effect of the oil and gas production diesel storage hybrid system. This method can not only improve the efficiency and safety of oil and gas production, but also significantly reduce fuel consumption and operating costs, and contribute to the sustainable development of the oil and gas industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic flow chart of a method for online acquisition of fuel consumption of a diesel storage hybrid system for oil and gas production according to the present invention;

[0052] Figure 2 Schematic diagram of piecewise linear interpolation in an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described below with reference to the accompanying drawings.

[0054] In this embodiment, see Figure 1 As shown, the present invention proposes an online method for obtaining fuel consumption of an oil and gas production diesel storage hybrid system, comprising the steps of:

[0055] S100, establishing a functional relationship between fuel consumption and power according to a power and fuel consumption curve of the diesel generator;

[0056] S200, using the functional relationship between fuel consumption and power to obtain the total fuel consumption before energy storage is connected, including the steps of:

[0057] S201, obtaining the diesel generator working fuel consumption before energy storage is connected;

[0058] S202, obtaining the fuel consumption of the diesel generator starting before the energy storage is connected;

[0059] S203, adding the diesel generator working fuel consumption before the energy storage is connected and the diesel generator starting fuel consumption before the energy storage is connected to obtain the total fuel consumption of the diesel generator before the energy storage is connected;

[0060] S300, using the functional relationship between fuel consumption and power, obtaining the total fuel consumption after energy storage is connected, including the steps of:

[0061] S301, obtaining the diesel generator working fuel consumption after energy storage is connected;

[0062] S302, obtaining the fuel consumption of the diesel generator after the energy storage is connected;

[0063] S303, adding the working fuel consumption of the diesel generator after the energy storage is connected and the starting fuel consumption of the diesel generator after the energy storage is connected to obtain the total fuel consumption of the diesel generator after the energy storage is connected;

[0064] S400, compare the total fuel consumption of the diesel generator before the energy storage is connected and the total fuel consumption of the diesel generator after the energy storage is connected, and obtain the fuel consumption result of the oil and gas production diesel storage hybrid system.

[0065] As an optimization solution of the above embodiment, based on Figure 2As shown, according to the power and fuel consumption curve of the diesel generator, the corresponding functional relationship between power and fuel consumption rate is established, which is a piecewise function:

[0066]

[0067] Where n is the total number of stages, (a k ,a k+1 ) is the range of the independent variable of each stage function, y k (k=1,2,…,n) is the function expression of the corresponding stage;

[0068] To obtain each point y k The function expression of is used, and the fuel consumption value corresponding to the power is obtained by piecewise linear interpolation.

[0069] Specifically, let the power at time t be P(t), when P(t)∈(a k ,a k+1 ), the fuel consumption value is obtained by linear interpolation:

[0070]

[0071] As an optimization solution of the above embodiment, for step S200, the total fuel consumption before energy storage is connected is obtained by using the functional relationship between fuel consumption and power, including the steps of:

[0072] S201, obtain the diesel generator fuel consumption before energy storage is connected, including:

[0073] The total load power at time t is P(t), and the number of diesel generators in operation is N(t). Indicates the power of each working diesel generator. According to the relationship between power and fuel consumption, power The corresponding fuel consumption is Therefore, the fuel consumption required for a diesel generator to work for 1 second at time t is calculated as:

[0074]

[0075] The total fuel consumption required for N(t) diesel generators to work for 1 second at time t is:

[0076]

[0077] Then the total diesel generator fuel consumption in the time period [0, T] is:

[0078]

[0079] S202, obtaining the diesel generator startup fuel consumption before energy storage is connected, including:

[0080] The diesel generator startup is the process from receiving the startup command to loading. Since the number of startups of the jth diesel generator in the [0, T] time period is θ j , the number of starts of n diesel generators is Each start-up time is τ seconds, and the fuel consumption is C liters per hour. The fuel consumption of a single diesel generator when started once is: Then the total diesel generator starting fuel consumption in the [0,T] time period is:

[0081]

[0082] S203, adding the diesel generator working fuel consumption before energy storage is connected and the diesel generator starting fuel consumption before energy storage is connected to obtain the total fuel consumption of the diesel generator before energy storage is connected:

[0083]

[0084] As an optimization solution of the above embodiment, for step S300, the total fuel consumption after energy storage is connected is obtained by using the functional relationship between fuel consumption and power, including the steps of:

[0085] S301, obtaining the diesel generator fuel consumption after energy storage is connected includes:

[0086] The power provided by the energy storage at time t after the energy storage is connected is I(t), where a positive I(t) indicates discharge and a negative I(t) indicates charging. The total load power at time t is P(t), and the power provided by the diesel generator is P(t)-I(t). The number of diesel generators working at time t is M(t).

[0087] At time t, the working state of the jth diesel generator is M j (t), M j (t)=1 means it is in working state, M j (t) = 0 indicates the stop state; then:

[0088] After the energy storage is connected, the output power of each diesel generator at time t is Corresponding fuel consumption The total fuel consumption of the diesel generator for 1 second at time t is:

[0089]

[0090] Then the total diesel generator fuel consumption in the time period [0, T] is:

[0091]

[0092] S302, the fuel consumption of the diesel generator startup after the energy storage is connected includes:

[0093] After energy storage is connected, the number of startups of the jth diesel generator t∈[0,T]λ j , the number of starts among n diesel generators is Each start-up time is τ seconds, and the fuel consumption is C liters per hour. The fuel consumption of a single diesel generator is:

[0094] Then the fuel consumption of starting the diesel generator after energy storage is connected is:

[0095]

[0096] S303, adding the diesel generator working fuel consumption after energy storage is connected and the diesel generator starting fuel consumption after energy storage is connected to obtain the total fuel consumption of the diesel generator after energy storage is connected:

[0097]

[0098] As an optimization scheme of the above embodiment, for step S400, the total fuel consumption of the diesel generator before the energy storage is connected and the total fuel consumption of the diesel generator after the energy storage is connected are compared to obtain the fuel consumption result of the oil and gas production diesel storage hybrid system, including:

[0099] Fuel saving rate:

[0100]

[0101] The total fuel consumption before the diesel generator is connected is O, which is the sum of the diesel generator's operating fuel consumption and starting fuel consumption: O = O f +O s ;

[0102] The total fuel consumption after energy storage is connected is O', which is the sum of the diesel generator's operating fuel consumption and starting fuel consumption after energy storage is connected: O' = O' f +O' s .

[0103] The conventional method is to measure the actual diesel consumption through a flow meter, but this method cannot measure the diesel consumption before and after the energy storage is connected at the same time, and thus cannot compare the fuel saving effect. This method is based on the power and fuel consumption relationship of the diesel generator, calculates the real-time power and fuel consumption, improves the measurement accuracy, increases visibility, and facilitates the energy saving evaluation of the diesel storage system. At the same time, according to the real-time fuel saving data, the control strategy can be adjusted to obtain greater benefits.

[0104] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for online acquisition of fuel consumption of a diesel storage hybrid system for oil and gas production, characterized in that: Includes steps: S100, establishing a functional relationship between fuel consumption and power according to a power and fuel consumption curve of the diesel generator; S200, using the functional relationship between fuel consumption and power to obtain the total fuel consumption before energy storage is connected, including the steps of: S201, obtaining the diesel generator working fuel consumption before energy storage is connected; S202, obtaining the fuel consumption of the diesel generator starting before the energy storage is connected; S203, adding the diesel generator working fuel consumption before the energy storage is connected and the diesel generator starting fuel consumption before the energy storage is connected to obtain the total fuel consumption of the diesel generator before the energy storage is connected; S300, using the functional relationship between fuel consumption and power, obtaining the total fuel consumption after energy storage is connected, including the steps of: S301, obtaining the diesel generator working fuel consumption after energy storage is connected; S302, obtaining the fuel consumption of the diesel generator after the energy storage is connected; S303, adding the working fuel consumption of the diesel generator after the energy storage is connected and the starting fuel consumption of the diesel generator after the energy storage is connected to obtain the total fuel consumption of the diesel generator after the energy storage is connected; S400, compare the total fuel consumption of the diesel generator before the energy storage is connected and the total fuel consumption of the diesel generator after the energy storage is connected, and obtain the fuel consumption result of the oil and gas production diesel storage hybrid system.

2. The method for online acquisition of fuel consumption of a hybrid system for oil and gas production and storage according to claim 1, characterized in that: According to the power and fuel consumption curve of the diesel generator, the corresponding functional relationship between power and fuel consumption rate is established, which is a piecewise function: Where n is the total number of stages, (a k ,a k+1 ) is the range of the independent variable of each stage function, y k (k=1,2,…,n) is the function expression of the corresponding stage; To obtain each point y k The function expression of is used, and the fuel consumption value corresponding to the power is obtained by piecewise linear interpolation.

3. The method for online acquisition of fuel consumption of a hybrid system for oil and gas production and storage according to claim 2 is characterized in that: The power at time t is P(t), when P(t)∈(a k ,a k+1 ), the fuel consumption value is obtained by linear interpolation:

4. The method for online acquisition of fuel consumption of a hybrid system for oil and gas production and storage according to claim 1, characterized in that: Obtain the diesel generator fuel consumption before energy storage is connected, including: The total load power at time t is P(t), and the number of diesel generators in operation is N(t). Indicates the power of each working diesel generator. According to the relationship between power and fuel consumption, power The corresponding fuel consumption is Therefore, the fuel consumption required for a diesel generator to work for 1 second at time t is calculated as: The total fuel consumption required for N(t) diesel generators to work for 1 second at time t is: Then the total diesel generator fuel consumption in the time period [0, T] is:

5. The method for online acquisition of fuel consumption of a diesel-storage hybrid system for oil and gas production according to claim 4, characterized in that: Obtain the diesel generator startup fuel consumption before energy storage is connected, including: The diesel generator startup is the process from receiving the startup command to loading. Since the number of startups of the jth diesel generator in the [0, T] time period is θ j , the number of starts of n diesel generators is Each start-up time is τ seconds, and the fuel consumption is C liters per hour. The fuel consumption of a single diesel generator when started once is: grams, then the total diesel generator starting fuel consumption in the [0, T] time period is:

6. The method for online acquisition of fuel consumption of a hybrid system for oil and gas production and storage according to claim 1, characterized in that: The fuel consumption of diesel generators after energy storage access includes: The power provided by the energy storage at time t after the energy storage is connected is I(t), where a positive I(t) indicates discharge and a negative I(t) indicates charging. The total load power at time t is P(t), and the power provided by the diesel generator is P(t)-I(t). The number of diesel generators working at time t is M(t). At time t, the working state of the jth diesel generator is M j (t), M j (t)=1 means it is in working state, M j (t) = 0 indicates the stop state; then: After the energy storage is connected, the output power of each diesel generator at time t is Corresponding fuel consumption The total fuel consumption of the diesel generator for 1 second at time t is: Then the total diesel generator fuel consumption in the time period [0, T] is:

7. The method for online acquisition of fuel consumption of a diesel-storage hybrid system for oil and gas production according to claim 6, characterized in that: The fuel consumption of diesel generator startup after energy storage access includes: After energy storage is connected, the number of startups of the jth diesel generator t∈[0,T]λ j , the number of starts among n diesel generators is Each start-up time is T seconds, and the fuel consumption is C liters per hour. The fuel consumption of a single diesel generator is: gram; Then the fuel consumption of starting the diesel generator after energy storage is connected is:

8. The method for online acquisition of fuel consumption of a hybrid system for oil and gas production and storage according to claim 1, characterized in that: By comparing the total fuel consumption of diesel generators before and after energy storage is connected, the fuel consumption results of the oil and gas production diesel-storage hybrid system are obtained, including: Fuel saving rate: The total fuel consumption before the diesel generator is connected is O, which is the sum of the diesel generator's operating fuel consumption and starting fuel consumption: O = O f +O s ; The total fuel consumption after energy storage is connected is O', which is the sum of the diesel generator's operating fuel consumption and starting fuel consumption after energy storage is connected: O' = O' f +O' s .

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