Park electric energy storage management system based on electric power system

Abstract

The invention relates to the field of electric energy storage management, aims to solve the problem that enough stable emergency electric energy supply time cannot be provided for a park with variable energy consumption by adopting fixed-limit electric energy storage in a park energy storage management system, and particularly relates to a park electric energy storage management system based on an electric power system. Comprising an electric energy input management unit, a park energy consumption management unit and an energy storage management unit. The energy consumption change rule in the park is obtained by performing data analysis on the energy consumption condition of the park, the energy consumption grades at different moments are obtained according to the relevance between the energy consumption change rule and the time, and when the energy storage system is managed, the electric energy storage condition of the energy storage system is adjusted according to the current time, so that the management efficiency of the energy storage system is improved. Therefore, the floating energy storage standard is utilized to manage the energy storage system, so that the energy storage condition of the energy storage system can better fit the actual condition, and the stability of the energy storage system during emergency supply is ensured.

Description

Technical Field

[0001] The present invention relates to the field of power storage management, and in particular to a park power storage management system based on a power system. Background Art

[0002] In the power system, the production and use of electric energy are carried out simultaneously and are balanced in quantity, but the power consumption is always fluctuating. At the same time, the possibility of power generation equipment failure must also be considered. Therefore, the capacity of power generation equipment put into operation in the system is often higher than the power consumption, so that the excess electric energy can be stored and adjusted for use when the backup power increases or when the power generation fails. The power energy storage system can realize the transfer of electric energy and promote the application of new energy technologies. At the same time, microgrids can be established to provide electricity to areas without electricity. It can also adjust the peak and frequency and improve the stability of power system operation. Therefore, the energy storage system is of great significance to the construction of smart grids.

[0003] The existing patent CN116979688B discloses a technical solution, and manages the power storage device in the park through the solution, so as to ensure that there is always surplus power in the power storage device to meet the power usage when the power input is interrupted. However, in actual use, the power consumption in the park is not fixed. Therefore, in order to achieve the purpose of maintaining sufficient power supply time through the energy storage device to restore the power supply when the power supply is interrupted, the energy storage device needs to reserve different power according to different energy consumption conditions, so as to better ensure the stability of the maintenance time of the backup power supply. Therefore, the fixed reserve power method cannot adapt to the park with changing energy consumption, thereby affecting the emergency supply effect of the energy storage device;

[0004] In view of the above technical problems, this application proposes a solution. Summary of the invention

[0005] The present invention obtains the energy consumption variation law in the park by performing data analysis on the energy consumption of the park, and obtains the energy consumption classification at different times according to the correlation between the energy consumption variation law and time. When managing the energy storage system, the electric energy reserve situation of the energy storage system is adjusted according to the current time, so that the energy storage system is managed by using the floating energy reserve standard, so that the energy reserve situation of the energy storage system can be more in line with the actual situation, ensuring the stability of the energy storage system during emergency supply, solving the problem that the fixed amount of electric energy reserve used in the park energy storage management system cannot provide sufficiently stable emergency power supply time for the park with changing energy consumption, and proposing a park power storage management system based on the power system.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The park power storage management system based on the power system includes a power input management unit, a park energy consumption management unit and an energy storage management unit. The power input management unit is used to manage the power supply to the park, and compare the power generation capacity of the autonomous power generation point with the power consumption capacity of the park, so as to control the switching between power supply from the power grid, autonomous power generation, charging and discharging of energy storage devices or mixed power supply;

[0008] The park energy consumption management unit is used to collect statistics on the power consumption of the park and determine whether the power consumption of the park is uniform. If it is not uniform, the power consumption law of the park is analyzed and obtained according to the power consumption;

[0009] The energy storage management unit is used to manage the energy storage device, obtain the remaining electric energy in the energy storage device, and determine whether the remaining electric energy in the energy storage device meets the demand based on the current energy consumption and power supply conditions of the park. When the demand is not met, it is supplemented by charging so that the remaining electric energy in the energy storage device meets the floating energy storage margin or the conventional energy storage margin.

[0010] As a preferred embodiment of the present invention, the power input management unit includes a power grid input management unit and a self-generation management unit;

[0011] The self-generation management unit is used to count the real-time power generation and send the statistical results to the power input management unit. The power grid input management unit is used to control the power grid input situation, thereby changing the power grid power input situation.

[0012] As a preferred implementation mode of the present invention, when the park energy consumption management unit performs statistics on power consumption, it takes one hour as a stage, obtains the total amount of power consumption in one hour, and records it as unit power consumption;

[0013] The park energy consumption management unit obtains 24 groups of unit power consumption in the park within 24 hours in a 24-hour cycle, and draws a daily power consumption change curve with time as the horizontal axis and unit power consumption as the vertical axis.

[0014] As a preferred implementation of the present invention, the park energy consumption management unit analyzes the daily power consumption change curve, obtains the unit power consumption corresponding to the peak in the daily power consumption change curve, and records it as the unit energy consumption peak value. The park energy consumption management unit multiplies the unit energy consumption peak value by a preset coefficient β to obtain a high energy consumption reference value, wherein β<1;

[0015] The park energy consumption management unit obtains a trough point in the daily power consumption change curve and records it as a low value of unit energy consumption. The park energy consumption management unit multiplies the low value of unit energy consumption by a preset coefficient θ to obtain a low energy consumption reference value, wherein θ>1;

[0016] The park energy consumption management unit records the low energy consumption reference value as e and the high energy consumption reference value as E, and obtains the reference value difference ratio J through formula analysis. The park energy consumption management unit compares the reference value difference ratio J with the preset ratio threshold. If the reference value difference ratio is not greater than the preset ratio threshold, the power consumption pattern is recorded as uniform power consumption. If the reference value difference ratio is greater than the preset ratio threshold, the power consumption pattern is analyzed.

[0017] As a preferred implementation of the present invention, the specific analysis process of the park energy consumption management unit analyzing the power consumption pattern is as follows:

[0018] The park energy consumption management unit compares all unit power consumption in the daily power consumption change curve with the high energy consumption reference value. If the unit power consumption is greater than the high energy consumption reference value, it is recorded as high-level discharge time. If the unit power consumption is less than the high energy consumption reference value but greater than the low energy consumption reference value, it is recorded as normal discharge time. If the unit power consumption is less than the low energy consumption reference value, it is recorded as low-level discharge time.

[0019] As a preferred implementation mode of the present invention, the self-generation management unit counts the real-time power generation, the power input management unit obtains the current park energy consumption through the park energy consumption management unit, calculates the power difference according to the current park energy consumption and the real-time power generation, and if the real-time power generation is less than the current park energy consumption, the current time is recorded as T, the set time interval is recorded as t, the set interval time point is obtained by T+t, and the time detection range is obtained by the current time point T and the set interval time point T+t;

[0020] The power input management unit brings the time detection range into the daily energy consumption variation curve, and performs analysis according to the power consumption rule described in the time detection range.

[0021] As a preferred implementation of the present invention, the specific process of the analysis performed by the power input management unit is as follows:

[0022] If the daily energy consumption curve belongs to the uniform power consumption law, the energy storage management unit controls the charge and discharge of the remaining power of the energy storage device according to the conventional energy storage margin to ensure that the energy storage margin in the energy storage device meets the conventional energy storage margin;

[0023] If the daily energy consumption curve does not belong to the uniform power consumption law, the power consumption law corresponding to the time detection range is statistically analyzed to obtain the power reserve coefficient X.

[0024] As a preferred implementation mode of the present invention, the energy storage management unit changes the conventional energy storage margin by the electric energy reserve coefficient to obtain the floating energy storage margin, and compares the floating energy storage margin with the electric energy margin. If the electric energy margin is greater than the floating energy storage margin, the energy storage device is used to supplement the energy consumption of the park, and when the electric energy margin is equal to the floating energy storage margin, the supplementary power supply is stopped and switched to the grid input management unit for supplementary power supply;

[0025] If the surplus electric energy is not greater than the surplus floating energy storage, the grid input management unit will simultaneously provide supplementary power to the park's energy consumption and charge the energy storage device.

[0026] As a preferred implementation of the present invention, the electric energy reserve coefficient is obtained in the following manner:

[0027] The total length of the time detection range is recorded as A, the length of the high-level discharge time within the time detection range is recorded as a, the length of the normal discharge time within the time detection range is recorded as b, and the length of the low-level discharge time within the time detection range is recorded as c;

[0028] The power input management unit generates the power reserve coefficient X corresponding to the time detection range through formula analysis, and the power reserve coefficient Among them, m, n, q are the weight coefficients corresponding to the high-level discharge time, normal discharge time and low-level discharge time.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. In the present invention, by collecting statistics on the energy consumption of the park, the energy consumption variation law in the park is obtained by means of data law analysis, and the energy consumption classification at different times is obtained according to the correlation between the energy consumption variation law and time. When managing the energy storage system, the electric energy reserve situation of the energy storage system is adjusted according to the current time, so that the energy storage system is managed by using a floating energy reserve standard, so that the energy reserve situation of the energy storage system can be more in line with the actual situation, ensuring the stability of the energy storage system during emergency supply.

[0031] 2. In the present invention, when analyzing the regularity of the energy consumption of the park, the difference analysis is performed on different regularities. When the difference is insufficient, the energy consumption of the park is fuzzy processed, thereby dividing the energy consumption of the park into two types: uniformity and regularity. This provides the possibility of simplifying the management process for the management of the energy storage system, and also improves the universality of the energy storage management system, so that it can be applied to both parks with changing energy consumption and parks with stable energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0033] Figure 1 is a system block diagram of the present invention;

[0034] Figure 2 It is a system flow chart of the present invention. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. 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.

[0036] Embodiment 1:

[0037] See also Figure 1 - Figure 2 As shown, the park power storage management system based on the power system includes an electric energy input management unit, a park energy consumption management unit and an energy storage management unit, wherein the electric energy input management unit includes a grid input management unit and a self-generation management unit;

[0038] The park energy consumption management unit counts the power consumption in the park. When counting the power consumption, it takes one hour as a stage, obtains the total power consumption in one hour, and records it as the unit power consumption;

[0039] The park energy consumption management unit uses a 24-hour cycle to obtain 24 groups of unit power consumption in the park within 24 hours, and draws a daily power consumption change curve with time as the horizontal axis and unit power consumption as the vertical axis;

[0040] The park energy consumption management unit analyzes the daily power consumption change curve, obtains the peak in the daily power consumption change curve, and records the unit power consumption corresponding to the peak as the unit energy consumption peak value. The park energy consumption management unit multiplies the unit energy consumption peak value by a preset coefficient β to obtain a high energy consumption reference value, where β<1;

[0041] The park energy consumption management unit obtains the trough point in the daily power consumption change curve and records it as the low value of unit energy consumption. The park energy consumption management unit multiplies the low value of unit energy consumption by a preset coefficient θ to obtain a low energy consumption reference value, where θ>1;

[0042] The park energy consumption management unit records the low energy consumption reference value as e and the high energy consumption reference value as E. The reference value difference ratio J is obtained through formula analysis. The park energy consumption management unit compares the reference value difference ratio J with the preset ratio threshold. If the reference value difference ratio is not greater than the preset ratio threshold, a uniform power consumption signal is generated, and the power consumption pattern is recorded as uniform power consumption. If the reference value difference ratio is greater than the preset ratio threshold, the power consumption pattern is analyzed. The specific analysis process is as follows:

[0043] The park energy consumption management unit compares all unit power consumption in the daily power consumption change curve with the high energy consumption reference value. If the unit power consumption is greater than the high energy consumption reference value, it is recorded as high-level discharge time. If the unit power consumption is less than the high energy consumption reference value but greater than the low energy consumption reference value, it is recorded as normal discharge time. If the unit power consumption is less than the low energy consumption reference value, it is recorded as low-level discharge time.

[0044] Embodiment 2:

[0045] See also Figure 1 - Figure 2 As shown, the energy storage management unit is used to obtain the electric energy storage status in the energy storage device, and record the obtained electric energy storage status as the electric energy surplus;

[0046] The self-generation management unit counts the real-time power generation, and sends the real-time power generation as power input to the power input management unit. The power input management unit obtains the current park energy consumption through the park energy consumption management unit, and calculates the power difference based on the current park energy consumption and the real-time power generation counted by the self-generation management unit. If the real-time power generation is greater than the current park energy consumption, the real-time power generation is diverted, and the part of the real-time power generation that is greater than the current park energy consumption is diverted to the energy storage device to charge the energy storage device.

[0047] If the real-time power generation is less than the current park energy consumption, the current time is recorded as T, the set time interval is recorded as t, the set interval time point is obtained by T+t, and the time detection range is obtained by the current time point T and the set interval time point T+t;

[0048] The power input management unit brings the time detection range into the daily energy consumption change curve and analyzes the power consumption law described in the time detection range. The specific process is as follows:

[0049] If the daily energy consumption variation curve belongs to the uniform power consumption law, a conventional energy storage signal is generated and sent to the energy storage management unit. After obtaining the conventional energy storage signal, the energy storage management unit compares the current power surplus with the conventional energy storage surplus. If the current power surplus is greater than the conventional energy storage surplus, the energy storage device is used to supply power to the park, thereby making up for the shortfall between the real-time power generation and the current energy consumption of the park. When the power surplus in the energy storage device is equal to the conventional energy storage surplus, the power supply to the park is stopped. The power input management unit supplements the power supply to the park through the power grid input management unit. If the current power surplus is not greater than the conventional energy storage surplus, the power input management unit supplements the power supply to the park through the self-generation management unit or the power grid input management unit, while charging the energy storage device, so that the power surplus of the energy storage device reaches the conventional energy storage surplus.

[0050] If the daily energy consumption curve does not belong to the uniform power consumption law, the power consumption law corresponding to the time detection range is counted, and the total length of the time detection range is recorded as A, the length of the high-level discharge time within the time detection range is recorded as a, the length of the normal discharge time within the time detection range is recorded as b, and the length of the low-level discharge time within the time detection range is recorded as c;

[0051] The power input management unit generates the power reserve coefficient X corresponding to the time detection range through formula analysis. Among them, m, n, q are the weight coefficients corresponding to the high-level discharge time, normal discharge time, and low-level discharge time;

[0052] The electric energy input management unit sends the electric energy reserve coefficient X to the energy storage management unit. The energy storage management unit changes the conventional energy storage margin by the electric energy reserve coefficient, obtains the product of the conventional energy storage margin and the electric energy reserve coefficient, records it as the floating energy storage margin, and compares the floating energy storage margin with the electric energy margin. If the electric energy margin is greater than the floating energy storage margin, the energy storage device is used to supplement the energy consumption of the park, and when the electric energy margin is equal to the floating energy storage margin, the supplementary power supply is stopped and switched to the grid input management unit for supplementary power supply;

[0053] If the surplus electric energy is not greater than the surplus floating energy storage, the grid input management unit will simultaneously supply power to the energy consumption of the park and charge the energy storage device, so that the surplus electric energy of the energy storage device reaches the surplus floating energy storage, thereby ensuring that when the electric energy input management unit stops working, the electric energy in the energy storage device can support the operation of the park for a certain period of time, avoiding the loss of power supply to the park before power supply is restored, thereby affecting the operation of the park.

[0054] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The park power storage management system based on the power system is characterized by: It includes an electric energy input management unit, a park energy consumption management unit and an energy storage management unit. The electric energy input management unit is used to manage the power supply to the park, and compare the power generation capacity of the autonomous power generation point with the power consumption capacity of the park, so as to control the switching between power supply from the grid, autonomous power generation, charging and discharging of energy storage devices or mixed power supply; The park energy consumption management unit is used to collect statistics on the power consumption of the park and determine whether the power consumption of the park is uniform. If it is not uniform, the power consumption law of the park is analyzed and obtained according to the power consumption; The energy storage management unit is used to manage the energy storage device, obtain the remaining electric energy in the energy storage device, and determine whether the remaining electric energy in the energy storage device meets the demand based on the current energy consumption and power supply conditions of the park. When the demand is not met, it is supplemented by charging so that the remaining electric energy in the energy storage device meets the floating energy storage margin or the conventional energy storage margin.

2. The park power storage management system based on the power system according to claim 1 is characterized in that: The electric energy input management unit includes a power grid input management unit and a self-generation management unit; The self-generation management unit is used to count the real-time power generation and send the statistical results to the power input management unit. The power grid input management unit is used to control the power grid input situation, thereby changing the power grid power input situation.

3. The park power storage management system based on the power system according to claim 1 is characterized in that: When the park energy consumption management unit counts the power consumption, it takes one hour as a stage, obtains the total power consumption in one hour, and records it as the unit power consumption; The park energy consumption management unit obtains 24 groups of unit power consumption in the park within 24 hours in a 24-hour cycle, and draws a daily power consumption change curve with time as the horizontal axis and unit power consumption as the vertical axis.

4. The park power storage management system based on the power system according to claim 3 is characterized in that: The park energy consumption management unit analyzes the daily power consumption change curve, obtains the unit power consumption corresponding to the peak in the daily power consumption change curve, and records it as the unit energy consumption peak value. The park energy consumption management unit multiplies the unit energy consumption peak value by a preset coefficient β to obtain a high energy consumption reference value, where β<1; The park energy consumption management unit obtains a trough point in the daily power consumption change curve and records it as a low value of unit energy consumption. The park energy consumption management unit multiplies the low value of unit energy consumption by a preset coefficient θ to obtain a low energy consumption reference value, wherein θ>1; The park energy consumption management unit records the low energy consumption reference value as e and the high energy consumption reference value as E, and obtains the reference value difference ratio J through formula analysis. The park energy consumption management unit compares the reference value difference ratio J with the preset ratio threshold. If the reference value difference ratio is not greater than the preset ratio threshold, the power consumption pattern is recorded as uniform power consumption. If the reference value difference ratio is greater than the preset ratio threshold, the power consumption pattern is analyzed.

5. The park power storage management system based on the power system according to claim 4 is characterized in that: The specific analysis process of the park energy consumption management unit for analyzing the power consumption pattern is as follows: The park energy consumption management unit compares all unit power consumption in the daily power consumption change curve with the high energy consumption reference value. If the unit power consumption is greater than the high energy consumption reference value, it is recorded as high-level discharge time. If the unit power consumption is less than the high energy consumption reference value but greater than the low energy consumption reference value, it is recorded as normal discharge time. If the unit power consumption is less than the low energy consumption reference value, it is recorded as low-level discharge time.

6. The park power storage management system based on the power system according to claim 1, characterized in that: The self-generation management unit counts the real-time power generation, and the power input management unit obtains the current park energy consumption through the park energy consumption management unit, and calculates the power difference according to the current park energy consumption and the real-time power generation. If the real-time power generation is less than the current park energy consumption, the current time is recorded as T, and the set time interval is recorded as t, and the set interval time point is obtained by T+t, and the time detection range is obtained by the current time point T and the set interval time point T+t; The power input management unit brings the time detection range into the daily energy consumption variation curve, and performs analysis according to the power consumption rule described in the time detection range.

7. The park power storage management system based on the power system according to claim 6, characterized in that: The specific process of the analysis performed by the power input management unit is as follows: If the daily energy consumption curve belongs to the uniform power consumption law, the energy storage management unit controls the charge and discharge of the remaining power of the energy storage device according to the conventional energy storage margin to ensure that the energy storage margin in the energy storage device meets the conventional energy storage margin; If the daily energy consumption curve does not belong to the uniform power consumption law, the power consumption law corresponding to the time detection range is statistically analyzed to obtain the power reserve coefficient X.

8. The park power storage management system based on the power system according to claim 1, characterized in that: The energy storage management unit changes the conventional energy storage surplus by the electric energy reserve coefficient to obtain the floating energy storage surplus, and compares the floating energy storage surplus with the electric energy surplus. If the electric energy surplus is greater than the floating energy storage surplus, the energy storage device is used to supplement the energy consumption of the park, and when the electric energy surplus is equal to the floating energy storage surplus, the supplementary power supply is stopped and switched to the grid input management unit for supplementary power supply; If the surplus electric energy is not greater than the surplus floating energy storage, the grid input management unit will simultaneously provide supplementary power to the park's energy consumption and charge the energy storage device.

9. The park power storage management system based on the power system according to claim 1, characterized in that: The method for obtaining the electric energy reserve coefficient is as follows: The total length of the time detection range is recorded as A, the length of the high-level discharge time within the time detection range is recorded as a, the length of the normal discharge time within the time detection range is recorded as b, and the length of the low-level discharge time within the time detection range is recorded as c; The power input management unit generates the power reserve coefficient X corresponding to the time detection range through formula analysis, and the power reserve coefficient Among them, m, n, q are the weight coefficients corresponding to the high-level discharge time, normal discharge time and low-level discharge time.

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