Power system based park power storage management system

Abstract

The present application relates to the field of electric power energy storage management, and is used to solve the problem that the fixed amount of electric energy reserve in the park energy storage management system cannot provide enough stable emergency power supply time for the park with variable energy consumption, in particular to a park electric power energy storage management system based on power system, comprising an electric energy input management unit, a park energy consumption management unit and an energy storage management unit; the present application obtains the energy consumption variation law in the park by data analysis of 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 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, and the energy reserve of the energy storage system can be more in line with the actual situation, and the stability of the energy storage system in emergency supply is ensured.

Description

TECHNICAL FIELD

[0001] The application relates to the field of electric power energy storage management, in particular to a park electric power energy storage management system based on an electric power system. BACKGROUND

[0002] In an electric power system, the production and use of electric energy are carried out at the same time and are balanced in quantity, but the power consumption is always fluctuating, and the possibility of failure of power generation equipment also needs to be considered, so the capacity of the 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 for use when the power consumption rises or the power generation fails. The electric power energy storage system can realize the movement of electric power energy, promote the application of new energy technology, and at the same time can establish a microgrid to provide electric power for areas without electricity, can adjust the peak and frequency, and improve the stability of the electric power system, so the energy storage system has great significance for the construction of the smart grid.

[0003] The prior art patent CN116979688B discloses a technical solution, and manages the electric power energy storage device in the park, so that there is always residual electric power in the electric power energy storage device to meet the electric power use when the electric power input is interrupted. However, in the actual use process, the electric power consumption in the park is not fixed, so if the purpose of maintaining sufficient power supply time to strive for the recovery of electric power supply through the energy storage device when the electric power supply is interrupted is to be achieved, the energy storage device needs to reserve different electric power according to different energy consumption conditions, so as to better ensure the maintenance time stability of the standby power supply. Therefore, the fixed reserve electric power cannot adapt to the park with varying energy consumption, thereby affecting the emergency supply effect of the energy storage device.

[0004] In view of the above technical problems, the application provides a solution. SUMMARY

[0005] The application obtains the energy consumption variation law in the park by data analysis of 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 the time. When the energy storage system is managed, the electric energy reserve condition 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 condition of the energy storage system can be more in line with the actual situation, and the stability of the energy storage system in emergency supply is ensured. The problem that the fixed amount of electric energy reserve in the park energy storage management system cannot provide sufficient stable emergency electric energy supply time for the park with varying energy consumption is solved, and the park electric power energy storage management system based on the electric power system is provided.

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

[0007] The park power energy storage management system based on the power system includes an energy input management unit, a park energy consumption management unit, and an energy storage management unit. The energy input management unit is used to manage the power supply to the park and compare the power generation capacity of the self-generated power supply points with the power consumption capacity of the park to control the switching between grid power supply, self-generated power supply, energy storage device charging and discharging, or hybrid power supply.

[0008] The park energy consumption management unit is used to statistically analyze the park's power consumption, determine whether the park's power consumption is uniform, and if it is not uniform, analyze the park's power consumption pattern based on the power consumption data.

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

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

[0011] The self-generated power 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 input situation.

[0012] In a preferred embodiment of the present invention, when the park energy management unit performs statistics on 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.

[0013] The park's energy management unit acquires 24 sets of unit electricity consumption within a 24-hour period, and plots a daily electricity consumption change curve with time on the horizontal axis and unit electricity consumption on the vertical axis.

[0014] In a preferred embodiment 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. The park energy consumption management unit calculates the unit energy consumption peak by multiplying it with a preset coefficient β to obtain a high energy consumption reference value, where β < 1.

[0015] 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 calculates the low value of unit energy consumption by multiplying it by a preset coefficient θ, where θ > 1.

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

[0017] As a preferred embodiment of the present application, the specific analysis process of the park energy consumption management unit for analyzing the power consumption law is as follows:

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

[0019] As a preferred embodiment of the present application, the self-power generation management unit counts real-time power generation. The power input management unit obtains current park energy consumption through the park energy consumption management unit, calculates a power difference value according to the current park energy consumption and the real-time power generation, records a current time as T, and records a set time interval as t. A set interval time point is obtained through T+t, and a time detection range is obtained through 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 change curve, and analyzes the power consumption law according to the time detection range.

[0021] As a preferred embodiment of the present application, the specific process of the power input management unit for analysis is as follows:

[0022] If the daily energy consumption change curve belongs to the uniform power consumption law, the energy storage management unit controls the charging and discharging 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 change curve does not belong to the uniform power consumption law, the power consumption law corresponding to the time detection range is counted, and an energy storage coefficient X is obtained.

[0024] As a preferred embodiment of the present application, the energy storage management unit changes the conventional energy storage amount by an energy reserve coefficient to obtain a floating energy storage amount, and compares the floating energy storage amount with the energy amount, if the energy amount is greater than the floating energy storage amount, the energy consumption of the park is supplemented by the energy storage device, and when the energy amount is equal to the floating energy storage amount, the supplement power supply is stopped and the grid input management unit is converted to supplement power supply;

[0025] If the energy amount is not greater than the floating energy storage amount, the grid input management unit is used to supplement the power supply of the park consumption at the same time as charging the energy storage device.

[0026] As a preferred embodiment of the present application, the energy reserve coefficient is obtained in the following way:

[0027] The total length of the time detection range is recorded as A, the length corresponding to the high discharge time in the time detection range is recorded as a, the length corresponding to the ordinary discharge time in the time detection range is recorded as b, and the length corresponding to the low discharge time in the time detection range is recorded as c.

[0028] The energy input management unit generates an energy reserve coefficient X corresponding to the time detection range by formula analysis, and the energy reserve coefficient Where m, n, q are weight coefficients corresponding to high discharge time, ordinary discharge time and low discharge time.

[0029] Compared with the prior art, the present application has the following advantages:

[0030] 1. In the present application, the energy consumption of the park is counted, the energy consumption variation law in the park is obtained by data law analysis, and the energy consumption classification at different times is obtained according to the correlation between energy consumption variation law and time. When managing the energy storage system, the energy reserve 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, and the energy reserve of the energy storage system can be more in line with the actual situation, and the stability of the energy storage system in emergency supply is ensured.

[0031] 2. In the present application, when the park energy consumption is analyzed, different rules are analyzed differently, and when the difference is insufficient, the park energy consumption is processed, so that the park energy consumption is divided into uniformity and regularity, which provides the possibility of simplifying the management process for the management of the energy storage system, and improves the universality of the energy storage management system, so that it can be applied to the park with variable energy consumption and the park with stable energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to facilitate the understanding of those skilled in the art, the present application will be further described in conjunction with the drawings.

[0033] Figure 1 System block diagram of the present application;

[0034] Figure 2 System flow chart of the present application. DETAILED DESCRIPTION

[0035] The technical solutions of the present application will be described clearly and completely in combination with the embodiments below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0036] Embodiment one:

[0037] Please refer to Figure 1 - Figure 2 As shown in the figure, the park power energy storage management system based on the power system comprises 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 comprises a power grid input management unit and a self-power generation management unit.

[0038] The park energy consumption management unit counts the power consumption in the park. When counting the power consumption, it takes each hour as a stage to obtain the total amount of power consumption in an hour, which is recorded as the unit consumption of electricity.

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

[0040] The park energy consumption management unit analyzes the daily power consumption change curve to obtain the wave crest in the daily power consumption change curve, and records the unit consumption of electricity corresponding to the wave crest 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.

[0041] The park energy consumption management unit obtains the wave trough point in the daily power consumption change curve and records it as the unit energy consumption low value. The park energy consumption management unit multiplies the unit energy consumption low value by a preset coefficient θ to obtain a low energy consumption reference value, wherein 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, 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 value, if the reference value difference ratio is not greater than the preset ratio threshold value, an electricity consumption uniform signal is generated, and the electricity consumption law is recorded as uniform electricity consumption, if the reference value difference ratio is greater than the preset ratio threshold value, the electricity consumption law is analyzed, and the specific analysis process is:

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

[0044] Embodiment two:

[0045] Please refer to Figure 1 - Figure 2 As shown in the figure, the energy storage management unit is used to acquire the energy storage situation in the energy storage device, and record the acquired energy storage situation as the energy surplus;

[0046] The self-power generation management unit counts the real-time power generation, and sends the real-time power generation as the power input to the power input management unit, the power input management unit acquires 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 counted by the self-power generation management unit, if the real-time power generation is greater than the current park energy consumption, the real-time power generation is shunted, and the part of the real-time power generation greater than the current park energy consumption is shunted 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, and the set time interval is recorded as t, the set interval time point is obtained through T+t, and the time detection range is obtained through 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 park energy consumption change curve, and analyzes the electricity consumption law according to the time detection range, and the specific process is:

[0049] If the energy consumption change curve belongs to the uniform power consumption law, a regular energy storage signal is generated and sent to the energy storage management unit. After obtaining the regular energy storage signal, the energy storage management unit compares the current energy balance with the regular energy storage balance. If the current energy balance is greater than the regular energy storage balance, the energy storage device is used to supply power to the park to make up for the insufficient real-time power generation and current park energy consumption. When the energy balance in the energy storage device is equal to the regular energy storage balance, the power supply to the park is stopped, and the power input management unit supplies power to the park through the grid input management unit. If the current energy balance is not greater than the regular energy storage balance, the power input management unit supplies power to the park through the self-power generation management unit or the grid input management unit while charging the energy storage device, so that the energy balance of the energy storage device reaches the regular energy storage balance.

[0050] If the energy consumption change curve does not belong to the uniform power consumption law, the power consumption law corresponding to the time detection range is counted, the total length of the time detection range is recorded as A, the length corresponding to the high discharge time in the time detection range is recorded as a, the length corresponding to the ordinary discharge time in the time detection range is recorded as b, and the length corresponding to the low discharge time in the time detection range is recorded as c.

[0051] The power input management unit generates an energy reserve coefficient X corresponding to the time detection range through formula analysis. The energy reserve coefficient X is Where m, n, and q are weight coefficients corresponding to the high discharge time, the ordinary discharge time, and the low discharge time.

[0052] The power input management unit sends the energy reserve coefficient X to the energy storage management unit. The energy storage management unit changes the regular energy storage balance based on the energy reserve coefficient to obtain the product of the regular energy storage balance and the energy reserve coefficient, which is recorded as the floating energy storage balance. The floating energy storage balance is compared with the energy balance. If the energy balance is greater than the floating energy storage balance, the energy storage device is used to supplement the power supply to the park energy consumption, and when the energy balance is equal to the floating energy storage balance, the power supply is stopped and the grid input management unit is used to supplement the power supply.

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

[0054] The preferred embodiments of the application disclosed above are only to facilitate the elucidation of the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments. Obviously, many modifications and variations can be made in light of the teachings above. The description is chosen and described in order to provide the best illustration of the application and its practical application to those skilled in the art and to enable those skilled in the art to best utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A park-based power storage management system based on a power system, characterized in that, It 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 compares the power generation capacity of the self-generated power supply points with the power consumption capacity of the park to control the switching between grid power supply, self-generated power supply, energy storage device charging and discharging, or hybrid power supply. The power input management unit includes a grid input management unit and a self-generated power management unit. The park's energy consumption management unit is used to statistically analyze the park's electricity consumption. It plots a daily electricity consumption change curve with time as the horizontal axis, unit electricity consumption as the vertical axis, and hourly as a period. Unit electricity consumption is the total electricity consumption in one hour. Based on the daily electricity consumption change curve, it determines whether the park's electricity consumption is uniform. If it is not uniform, it analyzes the park's electricity consumption pattern based on the electricity consumption situation, and analyzes the high-level discharge time, normal discharge time and low-level discharge time in the daily electricity consumption change curve. The energy storage management unit is used to manage the energy storage device, obtain the energy reserve in the energy storage device, and determine whether the energy reserve in the energy storage device meets the demand based on the current energy consumption and power supply of the park. If the demand is not met, it is supplemented by charging so that the energy reserve in the energy storage device meets the floating energy reserve or conventional energy reserve. The self-generated power management unit counts the real-time power generation. The power input management unit obtains the current energy consumption of the park through the park energy consumption management unit. It calculates the power difference based on the current energy consumption of the park and the real-time power generation. If the real-time power generation is less than the current energy consumption of the park, the current time is recorded as T and the set time interval is recorded as t. The set time interval point is obtained through T+t. The time detection range is obtained through the current time point T and the set time interval point T+t. The power input management unit incorporates the time detection range into the daily power consumption variation curve and analyzes the power consumption pattern based on the time detection range. The specific analysis process of the power input management unit is as follows: If the daily power consumption curve follows a uniform power consumption pattern, the energy storage management unit will control the charging and discharging of the energy storage device according to the conventional energy storage margin to ensure that the energy margin in the energy storage device meets the conventional energy storage margin. If the daily power consumption curve does not follow a uniform power consumption pattern, then the power consumption pattern corresponding to the time detection range is statistically analyzed to obtain the energy reserve coefficient X. The energy storage management unit modifies the conventional energy storage margin using the energy storage coefficient X, obtaining the product of the conventional energy storage margin and the energy storage coefficient X, which is recorded as the floating energy storage margin. The floating energy storage margin is compared with the energy storage margin. If the energy storage margin is greater than the floating energy storage margin, the energy storage device will supplement the energy consumption of the park. When the energy storage margin equals the floating energy storage margin, the supplementary power supply will stop, and the grid input management unit will switch to supplementary power supply. If the energy storage margin is not greater than the floating energy storage margin, the grid input management unit will supplement the energy consumption of the park while charging the energy storage device. The energy reserve coefficient X is obtained as follows: the total length of the time detection range is recorded as A, and the lengths of the corresponding high-level discharge time, normal discharge time, and low-level discharge time within the time detection range are recorded as a, b, and c, respectively; the energy input management unit generates the energy reserve coefficient X corresponding to the time detection range through formula analysis. Where m, n, and q are the weighting coefficients corresponding to the high-level discharge time, the normal discharge time, and the low-level discharge time.

2. The park power storage management system based on the power system according to claim 1, characterized in that, The power grid input management unit is used to control the power grid input situation, thereby changing the power input situation of the power grid.

3. The park power storage management system based on the power system according to claim 1, characterized in that, When the park's energy consumption management unit compiles statistics on the park's electricity consumption, it uses a 24-hour cycle to obtain 24 sets of unit electricity consumption data for the park within 24 hours and plots a daily electricity consumption change curve.

4. The park power storage management system based on the power system according to claim 3, 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. The park energy consumption management unit calculates the high energy consumption reference value by multiplying the unit energy consumption peak by a preset coefficient β, where β < 1. 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 calculates the low value of unit energy consumption by multiplying it by a preset coefficient θ, where θ > 1. The park's energy management unit records low energy consumption reference values ​​as e and high energy consumption reference values ​​as E, and obtains the reference value difference ratio J through formula analysis. The park's energy management unit compares the reference value difference ratio J with the preset ratio threshold. If the reference value difference ratio J is not greater than the preset ratio threshold, the power consumption pattern is recorded as uniform power consumption. If the reference value difference ratio J 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, characterized in that, The specific analysis process of the park's energy consumption management unit in analyzing power consumption patterns is as follows: The park's energy 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 a 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 a normal discharge time. If the unit power consumption is less than the low energy consumption reference value, it is recorded as a low-level discharge time.

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