Maximum efficiency point tracking method of energy storage system and energy management system

Abstract

The invention belongs to the technical field of energy storage systems, and particularly relates to a maximum efficiency point tracking method of an energy storage system and an energy management system.The maximum efficiency point tracking method comprises the steps that a maximum efficiency point method model is established, a maximum efficiency point tracking method model is established, and the maximum efficiency point tracking method model is connected with the maximum efficiency point tracking method model. The step of establishing the highest efficiency point method model is composed of establishing a highest efficiency point charging and discharging model, formulating a charging and discharging strategy and matching the highest efficiency point charging and discharging model, and the step of establishing the highest efficiency point tracking method model is composed of operating the highest efficiency point, verifying whether the highest efficiency point is met or not and tracking the highest efficiency point in real time. According to the method, the highest efficiency point charging and discharging model and strategy are established under the conditions of different environment temperatures, different equipment temperatures, different load requirements and the like, and the highest efficiency point is tracked, so that the energy conversion efficiency of the energy storage system is improved, and the problem of low charging and discharging efficiency of the whole energy storage system is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage systems, and in particular relates to a maximum efficiency point tracking method and an energy management system for an energy storage system. Background Art

[0002] At present, energy storage systems all use a single constant power and constant current of the battery to charge and discharge the entire system.

[0003] Common energy storage systems are mainly composed of energy storage batteries, energy storage converters (PCS) and distribution systems. The losses of these three components determine the efficiency of the entire system. For example, if the battery is charged and discharged at a single constant power and constant current, the loss of the energy storage converter or other components in this process will often be relatively high. The loss of the system will also be uncontrollable, and the loss may be the greatest in different environments. For example, when the temperature is high, the device will turn on the cooling system to increase the power consumption of the device. If the battery is charged and discharged at a single constant power and constant current, the charging and discharging efficiency of the entire energy storage system will be low. Summary of the invention

[0004] The purpose of the present invention is to provide a method for tracking the highest efficiency point of an energy storage system and an energy management system, aiming to solve the problems in the prior art. Common energy storage systems are mainly composed of energy storage batteries, energy storage converters (PCS) and power distribution systems. That is, the losses of these three major components determine the efficiency of the entire system. For example, the entire system is charged and discharged with a single constant power and constant current of the battery. In this process, the loss of the energy storage converter or other components is often relatively high, and the loss of the system will also be uncontrollable. In addition, the loss may be the largest in different environments. For example, when the temperature is high, the device will turn on the cooling system to increase the power consumption of the device. If the entire system is charged and discharged with a single constant power and constant current of the battery, the charging and discharging efficiency of the entire energy storage system will be low.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a maximum efficiency point energy management system for an energy storage system, comprising a maximum efficiency point method model and a maximum efficiency point tracking method model, wherein the maximum efficiency point method model and the maximum efficiency point tracking method model are connected, wherein the maximum efficiency point method model is composed of establishing a maximum efficiency point charging and discharging model, formulating a charging and discharging strategy, and matching a maximum efficiency point charging and discharging model, and wherein the maximum efficiency point tracking method model is composed of operating the maximum efficiency point, verifying whether the maximum efficiency point is met, and real-time tracking of the maximum efficiency point.

[0006] As a preferred embodiment of the maximum efficiency point energy management system of an energy storage system of the present invention, the maximum efficiency point charging and discharging model, the formulation of the charging and discharging strategy, and the matching of the maximum efficiency point charging and discharging model are connected.

[0007] As a preferred embodiment of the maximum efficiency point energy management system of an energy storage system of the present invention, the model for establishing a method for tracking the maximum efficiency point is connected by operating the maximum efficiency point, verifying whether it meets the maximum efficiency point, and tracking the maximum efficiency point in real time.

[0008] As a preferred maximum efficiency point energy management system of an energy storage system of the present invention, the maximum efficiency point charging and discharging model adopts the energy storage system to perform charging and discharging tests under different ambient temperatures, different equipment temperatures, different load demands and other conditions, calculates the maximum efficiency point under different environments and different working conditions, and thus establishes the maximum efficiency point charging and discharging model.

[0009] As a preferred embodiment of the maximum efficiency point energy management system of an energy storage system of the present invention, the charging and discharging strategy is formulated by formulating a personalized charging and discharging strategy based on a deeply mined maximum efficiency point charging and discharging model and the user's usage pattern and usage time.

[0010] As a preferred maximum efficiency point energy management system of an energy storage system of the present invention, the matching maximum efficiency point charging and discharging model adopts communication with each component device through the energy storage management system, so as to obtain in real time the current parameter information of each component in actual use, such as battery power, battery cell voltage, temperature, humidity, PCS equipment and distribution cabinet temperature, etc., and obtain the matching maximum efficiency point charging and discharging model based on the parameter information of the current energy storage system and load demand.

[0011] As a preferred embodiment of the maximum efficiency point energy management system of an energy storage system of the present invention, the operating maximum efficiency point adopts the maximum efficiency point model matched by the energy storage system and needs to monitor the actual system efficiency.

[0012] As a preferred maximum efficiency point energy management system of an energy storage system of the present invention, the verification of whether the maximum efficiency point is met is carried out by comparing the actual result of the executed maximum efficiency point with the model to see whether they are consistent. If not, the deviation strategy is executed. If it is consistent, the operation is maintained and real-time monitoring is performed to see whether there is a new maximum efficiency point.

[0013] As a preferred embodiment of the maximum efficiency point energy management system of an energy storage system of the present invention, the real-time tracking of the maximum efficiency point adopts an energy storage management system that needs to monitor various parameter information in real time to ensure timely acquisition of the new maximum efficiency point and real-time tracking.

[0014] A method for tracking the highest efficiency point of an energy storage system comprises the following steps: S1. establishing a charging and discharging model of the highest efficiency point according to different ambient temperatures, different equipment temperatures, different load demands and the like; S2. formulating a personalized charging and discharging strategy according to the user's usage pattern and usage time; S3. obtaining the current parameter information of each component in actual use, and matching the charging and discharging model of the highest efficiency point; S4. real-time monitoring of the parameter information of the energy storage management system to ensure real-time tracking of the highest efficiency point.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention establishes a maximum efficiency point charging and discharging model and strategy under different ambient temperatures, different equipment temperatures, different load demands and other conditions, tracks the maximum efficiency point, thereby improving the energy conversion efficiency of the energy storage system and optimizing the problem of low charging and discharging efficiency of the entire energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the tracking method flow of the present invention; Figure 2 It is a schematic diagram of the energy management system flow of the present invention; Figure 3 It is a schematic diagram of the process of the method for operating the highest efficiency point of the present invention.

[0017] In the figure: 1. Establish the highest efficiency point method model; 10. Highest efficiency point charge and discharge model; 20. Formulate charge and discharge strategy; 30. Match the highest efficiency point charge and discharge model; 2. Establish a model for tracking the highest efficiency point; 100. Run the highest efficiency point; 200. Verify whether the highest efficiency point is met; 300. Track the highest efficiency point in real time. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 2The present invention provides the following technical solutions: a maximum efficiency point energy management system for an energy storage system, comprising establishing a maximum efficiency point method model 1 and establishing a tracking maximum efficiency point method model 2, wherein the establishing the maximum efficiency point method model 1 and the establishing tracking the maximum efficiency point method model 2 are connected, wherein the establishing the maximum efficiency point method model 1 is composed of establishing a maximum efficiency point charging and discharging model 10, formulating a charging and discharging strategy 20, and matching a maximum efficiency point charging and discharging model 30, and the establishing and tracking the maximum efficiency point method model 2 is composed of operating the maximum efficiency point 100, verifying whether it meets the maximum efficiency point 200, and real-time tracking of the maximum efficiency point 300.

[0020] In the preferred embodiment: establishing a highest efficiency point charge and discharge model 10, formulating a charge and discharge strategy 20, and matching a highest efficiency point charge and discharge model 30 are connected.

[0021] In the preferred embodiment, the method model 2 for tracking the highest efficiency point is established by connecting the operation of the highest efficiency point 100, the verification of whether it meets the highest efficiency point 200 and the real-time tracking of the highest efficiency point 300.

[0022] In the preferred embodiment: the highest efficiency point charge and discharge model 10 uses the energy storage system to perform charge and discharge tests under different ambient temperatures, different equipment temperatures, different load demands and other conditions, calculates the highest efficiency point under different environments and different working conditions, and thus establishes the highest efficiency point charge and discharge model 10.

[0023] In the preferred embodiment, the charge and discharge strategy 20 is formulated by using the highest efficiency point charge and discharge model 10 dug out in depth and the user's usage pattern and usage time to formulate a personalized charge and discharge strategy.

[0024] In the preferred embodiment: the charging and discharging model 30 matching the highest efficiency point is communicated with each component device through the energy storage management system, so as to obtain the current parameter information of each component in actual use in real time, such as battery power, battery cell voltage, temperature, humidity, PCS equipment and distribution cabinet temperature, etc., and obtain the charging and discharging model 30 matching the highest efficiency point based on the parameter information of the current energy storage system and the load demand.

[0025] In the preferred embodiment: the operation of the highest efficiency point 100 uses the energy storage system to execute the matched highest efficiency point model, and the actual system efficiency needs to be monitored.

[0026] In the preferred embodiment: verifying whether the highest efficiency point 200 is met is to compare the actual result of the highest efficiency point executed with the model to see if it is met. If not, the deviation strategy is executed. If it is met, the operation is maintained and real-time monitoring is performed to see if there is a new highest efficiency point.

[0027] In the preferred embodiment: real-time tracking of the highest efficiency point 300 uses an energy storage management system that needs to monitor various parameter information in real time to ensure timely acquisition of a new highest efficiency point and real-time tracking.

[0028] See also Figures 1 to 3 A method for tracking the highest efficiency point of an energy storage system includes the following steps: S1. Establishing a highest efficiency point charging and discharging model 10 under different ambient temperatures, different equipment temperatures, different load demands and other conditions; S2. Formulating a personalized charging and discharging strategy according to the user's usage pattern and usage time; S3. Obtaining the current parameter information of each component in actual use, and matching the highest efficiency point charging and discharging model 30; S4. Real-time monitoring of the parameter information of the energy storage management system to ensure real-time tracking of the highest efficiency point 300.

[0029] Working principle: First, the energy storage system performs charge and discharge tests under different ambient temperatures, different equipment temperatures, different load requirements, etc., calculates the highest efficiency point under different environments and different working conditions, and thus establishes the highest efficiency point charge and discharge model 10. Then, a personalized charge and discharge strategy can be formulated based on the highest efficiency point charge and discharge model 10 that is dug out and the user's usage mode and usage time. Subsequently, the energy storage management system communicates with each component device to obtain the current parameter information of each component in actual use in real time, such as battery power, cell voltage, temperature, humidity, PCS equipment and distribution cabinet temperature, etc., and matches the highest efficiency point charge and discharge model 30 based on the parameter information of the current energy storage system and load requirements. Then, the energy storage system will execute the matched highest efficiency point model and needs to monitor the actual system efficiency. Secondly, the actual result of the executed highest efficiency point is compared with the model to see if it is consistent. If it is not consistent, the deviation strategy is executed. If it is consistent, it will keep running and monitor in real time whether there is a new highest efficiency point. Finally, the energy storage management system needs to monitor the parameter information in real time to ensure that the new highest efficiency point is obtained in time and tracked in real time.

[0030] It should be noted that: After obtaining the highest efficiency point, it is necessary to determine the execution of the highest efficiency point. If it meets the actual efficiency point, it should be kept running for 1 hour, and then a new highest efficiency point should be obtained again and monitored in real time to see if there is a new highest efficiency point.

[0031] If it does not meet the actual efficiency point, the second highest efficiency point needs to be executed, and then it is determined whether it meets the efficiency point. If it meets the actual efficiency point, it will continue to run for 1 hour and then re-obtain a new highest efficiency point and monitor in real time whether there is a new highest efficiency point.

[0032] In addition, if the second highest efficiency point does not match the actual efficiency point, it is necessary to determine whether it is higher than the highest efficiency point. If "yes", keep running for 1 hour, then re-obtain a new highest efficiency point and monitor in real time whether there is a new highest efficiency point.

[0033] If “No”, it is necessary to return to the highest efficiency point and keep running for 1 hour, then re-obtain a new highest efficiency point and monitor in real time whether there is a new highest efficiency point.

[0034] It is further explained that when the actual result of the highest efficiency point is compared with the model and it is not consistent, the charging and discharging model of the highest efficiency point can be calibrated.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A maximum efficiency point energy management system for an energy storage system, characterized in that: It includes establishing a maximum efficiency point method model (1) and establishing a maximum efficiency point tracking method model (2), wherein the establishing maximum efficiency point method model (1) and the establishing maximum efficiency point tracking method model (2) are connected; The method model for establishing the highest efficiency point (1) is composed of establishing a highest efficiency point charging and discharging model (10), formulating a charging and discharging strategy (20), and matching a highest efficiency point charging and discharging model (30). The method model for establishing and tracking the highest efficiency point (2) is composed of operating the highest efficiency point (100), verifying whether the highest efficiency point is met (200), and tracking the highest efficiency point in real time (300).

2. The energy management system for the energy storage system at the highest efficiency point according to claim 1, characterized in that: The highest efficiency point charge and discharge model (10), the formulation of a charge and discharge strategy (20), and the matching highest efficiency point charge and discharge model (30) are connected.

3. The energy management system for the highest efficiency point of an energy storage system according to claim 1, characterized in that: The model (2) for establishing a method for tracking the highest efficiency point is connected by operating the highest efficiency point (100), verifying whether it meets the highest efficiency point (200) and tracking the highest efficiency point in real time (300).

4. The energy management system for the highest efficiency point of an energy storage system according to claim 2, characterized in that: The maximum efficiency point charge and discharge model (10) uses the energy storage system to perform charge and discharge tests under different ambient temperatures, different equipment temperatures, different load requirements, etc., to calculate the maximum efficiency points under different environments and different working conditions, thereby establishing the maximum efficiency point charge and discharge model (10).

5. The maximum efficiency point energy management system of an energy storage system according to claim 2, characterized in that: The charge and discharge strategy (20) is formulated based on the highest efficiency point charge and discharge model (10) and the user's usage pattern and usage time to formulate a personalized charge and discharge strategy.

6. The maximum efficiency point energy management system of an energy storage system according to claim 2, characterized in that: The matching highest efficiency point charging and discharging model (30) is communicated with each component device through the energy storage management system, so as to obtain in real time the current parameter information of each component in actual use, such as battery power, battery cell voltage, temperature, humidity, PCS equipment and distribution cabinet temperature, etc., and obtain the matching highest efficiency point charging and discharging model (30) based on the parameter information of the current energy storage system and load demand.

7. The maximum efficiency point energy management system of an energy storage system according to claim 3, characterized in that: The operating maximum efficiency point (100) uses the energy storage system to execute a matching maximum efficiency point model, and the actual system efficiency needs to be monitored.

8. The energy management system for the highest efficiency point of an energy storage system according to claim 3, characterized in that: The verification of whether the highest efficiency point is met (200) is performed by comparing the actual result of the highest efficiency point executed with the model to see whether they are met. If not, a deviation strategy is executed. If it is met, the operation is maintained and real-time monitoring is performed to see whether there is a new highest efficiency point.

9. The maximum efficiency point energy management system of an energy storage system according to claim 3, characterized in that: The real-time tracking of the highest efficiency point (300) requires real-time monitoring of various parameter information by the energy storage management system to ensure timely acquisition of the new highest efficiency point and real-time tracking.

10. A method for tracking the maximum efficiency point of an energy storage system, characterized in that: The following steps are involved: S1. Establish a charging and discharging model at the highest efficiency point according to different ambient temperatures, different equipment temperatures, different load requirements, etc. (10); S2. Develop personalized charging and discharging strategies based on the user's usage patterns and usage time; S3. Obtaining the current parameter information of each component in actual use and matching the highest efficiency point charging and discharging model (30); S4. Real-time monitoring of various parameter information of the energy storage management system to ensure real-time tracking of the highest efficiency point.

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