Method for analyzing and adjusting peak-valley difference rate in source-network-load-storage integrated system

Abstract

The invention provides a method for analyzing and adjusting a peak-valley difference rate in a source-network-load-storage integrated system. The characteristics of the power demand in the source-grid-load-storage integrated system are evaluated and quantified, the peak period and the valley period in the system and the general principle followed by the peak-valley difference rate adjustment are determined, and then the adjustment strategy of the peak-valley difference rate is formulated for different scenes. According to the method, energy and energy storage equipment in the source-network-load-storage integrated system can be reasonably controlled and dispatched, so that the peak-valley difference rate is reduced, and smooth adjustment of the power demand is realized. The method can be suitable for solving the peak-valley difference rate adjustment strategy under various complex working conditions in the source-grid-load-storage integrated system, is wide in application range and convenient to solve, and can provide a scientific and reasonable analysis and control scheme for safe and stable operation of the source-grid-load-storage integrated system.

Description

Technical Field

[0001] The present invention relates to the field of steady-state characteristic analysis and control of a source-grid-load-storage integrated system, and in particular to a method for analyzing and adjusting a peak-to-valley difference rate in a source-grid-load-storage integrated system. Background Art

[0002] The source-grid-load-storage integrated system refers to the organic combination of energy sources (such as solar energy, wind energy, etc.), electrical equipment, power networks and energy storage equipment to form a comprehensive energy system. The system can achieve efficient use of energy, flexible scheduling of energy storage and stable operation of the power grid. In the source-grid-load-storage integrated system, the peak-valley difference rate refers to the difference between the peak and valley values ​​of electricity demand within a certain period of time. Analyzing the peak-valley difference rate of the source-grid-load-storage integrated system is to evaluate and quantify the characteristics of electricity demand in the source-grid-load-storage integrated system. By analyzing the electricity demand curve of the source-grid-load-storage integrated system within a certain period of time, the peak and valley periods in the system and the size of its peak-valley difference rate can be determined. This analysis can help system operators understand the changing laws of electricity demand, formulate reasonable scheduling strategies and optimize energy utilization. The peak-valley difference rate adjustment method refers to reducing the peak-valley difference rate and achieving smooth adjustment of electricity demand by reasonably controlling and scheduling the energy and energy storage equipment in the source-grid-load-storage integrated system. Specific adjustment methods may include the following aspects:

[0003] Prediction and optimization: Use data analysis and modeling technology to predict power demand so as to adjust the operation strategy of energy supply and energy storage equipment in advance. Through optimization algorithms, peak demand can be transferred to the valley period to reduce the peak-valley difference rate.

[0004] Energy storage scheduling: According to the changes in the peak-to-valley difference rate, the charging and discharging strategies of energy storage equipment are reasonably arranged. During the valley period, electricity is stored through charging; during the peak period, electricity demand is supplemented through discharge to smooth the power load curve and reduce the peak-to-valley difference rate.

[0005] Load side management: Monitor and regulate the user's electricity consumption through smart grid technology and energy management system. Flexible adjustment of user power demand can adapt to the peak and valley changes of the system and reduce the peak-valley difference rate.

[0006] Multi-energy complementary scheduling: In the integrated source-grid-load-storage system, different energy sources and energy storage devices are coordinated and scheduled to achieve complementary utilization of energy. For example, solar power generation and wind power generation can provide energy at different time periods, and energy storage devices can store electricity during low periods to meet peak demand.

[0007] However, the above regulation method only explains the general principle of regulating the peak-to-valley difference rate in the source-grid-load-storage integrated system from a qualitative perspective, and does not involve the specific analysis and control process. Summary of the invention

[0008] The purpose of the present invention is to propose a method for analyzing and adjusting the peak-to-valley difference rate in a source-grid-load-storage integrated system based on quantitative analysis. The method is based on the calculation formula of the peak-to-valley difference rate, derives the sensitivity of the peak value and valley value relative to the peak-to-valley difference rate, and further analyzes the influence of the regulating effect of new energy output, load and energy storage on the peak-to-valley difference rate, and then proposes the general principles for adjusting the peak-to-valley difference rate in different scenarios.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] A method for analyzing and adjusting the peak-to-valley difference rate in a source-grid-load-storage integrated system is characterized by the following steps.

[0011] Step 1: Establish a calculation model for the peak-to-valley difference rate in the source-grid-load-storage integrated system;

[0012] Step 2: Based on the calculation model obtained in step 1, analyze the impact of the peak and valley values ​​of the source-grid-load-storage integrated system on the peak-valley difference rate and set the target peak-valley values.

[0013] Step 3: Using the target peak-valley value obtained in step 2 as the regulation target, formulate a method for regulating the peak-valley difference rate of the source-grid-load-storage integrated system for different scenarios.

[0014] The details are as follows:

[0015] Step 1:

[0016] In the source-grid-load-storage system, the peak-valley difference rate is expressed as the ratio of the difference between the peak and valley values ​​of the external power receiving characteristics within a day to the peak value. The peak and valley values ​​of the external power receiving characteristics are related to the output of new energy, load size and charging and discharging of energy storage within a day. The calculation model of the peak-valley difference rate in the source-grid-load-storage integrated system is:

[0017]

[0018] Where f(P max ,P min ) is the peak-to-valley difference rate of the external power receiving characteristics of the source-grid-load-storage integrated system, P max is the peak value of external power received by the source-grid-load-storage integrated system in one day, P min is the valley value of external power received by the source-grid-load-storage integrated system in one day, P L is the active power of the load, P G Contribute to the development of new energy; B is the charging and discharging power of the energy storage, the sign is positive when charging and negative when discharging; T max Peak Pmax The moment of appearance; T min is the moment when the valley value appears.

[0019] Since the peak and valley values ​​of the source-grid-load-storage integrated system always meet P max ≥P min ≥0, and P max =P min =0, f(P max ,P min )=0, the peak-to-valley difference rate calculation formula can be further converted into the following formula for analysis:

[0020]

[0021] According to formula (1.2), when the peak value is equal to 0, the valley value is also equal to 0, the peak-to-valley difference is the smallest, and no adjustment is required. Therefore, we only need to consider the adjustment strategy when the peak value is greater than 0.

[0022] When the peak value is greater than 0, the peak-to-valley difference is Next, we analyze the impact of peak and valley value changes on the peak-to-valley difference rate. The sensitivity of the peak-to-valley difference rate to the peak and valley values ​​is calculated as:

[0023]

[0024] From equations (1.3) and (1.4), we can see that if the peak value and valley value are adjusted at the same time, the peak-to-valley difference rate changes with the peak value and valley value as follows:

[0025] Since the valley value is greater than 0, The peak-to-valley difference rate varies with the peak value P max Decrease and increase, with the valley value P min Increase and decrease, then in order to reduce the peak-to-valley difference rate, the peak value can be reduced and the valley value can be increased;

[0026] Step 2:

[0027] The target peak-valley value of the source-grid-load-storage integrated system can be calculated as follows:

[0028] (1) According to the sensitivity of the peak-to-valley value relative to the peak-to-valley difference rate and considering the total amount of control adjustment, the adjustment amount of the current peak-to-valley value is solved:

[0029]

[0030] Where f′(P max +ΔP max ,P min +ΔP min ) is the peak-to-valley difference rate after peak and valley value adjustment, ΔP max is the peak value adjustment, ΔP minis the adjustment amount for the valley value, The average value of external power received during the regulation period without considering the charging and discharging of energy storage. When the difference between the new peak and valley values ​​and the average value is equal, the control adjustment amount can be relatively small. If there is no solution to the above formula, the principle of further relaxation of regulation can be as follows:

[0031]

[0032] (2) Calculate the new peak and valley values, as well as the corresponding peak-to-valley difference rate:

[0033]

[0034] (3) Check whether the adjusted peak-to-valley difference rate satisfies the condition that it is less than the natural peak-to-valley difference rate of the load or less than a certain customized condition. If so, the current P max and P min This is the target peak-to-valley value. If it is not satisfied, return to step (1) and continue to adjust until the condition is satisfied.

[0035] Step 3:

[0036] In order to make the peak-to-valley difference rate of the source-load-storage system smaller than the peak-to-valley difference rate of the initial load or a given value, according to the analysis results of steps one and two, the adjustment target of the peak-to-valley value can be known. The control strategy is specifically formulated for different scenarios as follows:

[0037] (1) When the current state of charge of the energy storage meets the charging and discharging conditions, considering that peak load regulation is the main purpose of energy storage configuration, when the load and energy storage can be adjusted at the same time, the priority of energy storage regulation should be higher than the load response. Therefore, energy storage should be adjusted first:

[0038] From formula (1.1), we can know that the external power supply of the source-grid-load-storage integrated system follows the following calculation principles:

[0039]

[0040] According to formula (1.8), reduce P B Can increase P min , increase P B Can reduce P max , so charge and discharge operations are performed at the peak and valley moments to change P B Therefore, when only adjusting the energy storage, it can be done by increasing P at the peak moment. B To reduce the peak value, reduce P at the valley moment B To increase the valley value, and finally achieve the goal of reducing the peak-to-valley difference rate. It is worth noting that the energy storage charging and discharging operation should meet the condition that the charging and discharging power is not greater than its charging and discharging power limit, and should not exceed the maximum chargeable and dischargeable amount determined by the energy storage charge state;

[0041] (2) Verify whether the peak-to-valley difference rate of external power supply of the source-grid-load-storage integrated system meets the regulation requirements after energy storage regulation. When the peak regulation capacity of energy storage does not meet the demand, it is necessary to further adjust the adjustable part of the load:

[0042] According to formula (1.8), increasing P L Can increase P min , reduce P L Can reduce P max Therefore, P can be reduced at the peak time L To reduce the peak value, continue to increase P at the valley moment L To increase the valley value, and finally achieve the goal of reducing the peak-to-valley difference rate;

[0043] (3) Check whether the peak-to-valley difference rate of external power supply of the source-grid-load-storage integrated system meets the regulation requirements after load regulation. When the peak-to-valley difference rate regulation requirements of energy storage and adjustable loads are not met, the output of new energy can be further adjusted. However, since the maximum output capacity of new energy units depends on environmental conditions and cannot be actively increased, the regulation of new energy output only includes power abandonment operations:

[0044] According to formula (1.8), reduce P G Can increase P min Therefore, reducing the output of renewable energy at the valley moment can further increase the valley value, and ultimately achieve the goal of reducing the peak-to-valley difference rate.

[0045] The beneficial results of the present invention are: by proposing a method for analyzing and adjusting the peak-to-valley difference rate in a source-grid-load-storage integrated system based on quantitative analysis, the characteristics of the power demand in the source-grid-load-storage integrated system are evaluated and quantified, the peak and valley periods in the system and the general principles that should be followed in adjusting the peak-to-valley difference rate are determined, and then the peak-to-valley difference rate adjustment strategy is formulated for different scenarios. The proposed method can reduce the peak-to-valley difference rate and achieve smooth regulation of power demand by reasonably controlling and scheduling the energy and energy storage equipment in the source-grid-load-storage integrated system. The method can be applied to solving the peak-to-valley difference rate adjustment strategy under various complex working conditions in the source-grid-load-storage integrated system, has a wide range of applications, and is easy to solve, and can provide a scientific and reasonable analysis and control solution for the safe and stable operation of the source-grid-load-storage integrated system. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 Comparison of external power receiving characteristics before and after control is implemented. DETAILED DESCRIPTION

[0047] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent modifications of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0048] This embodiment takes a grid-connected source-grid-load-storage integrated system that combines wind and solar power to supply power to a chemical material manufacturing enterprise as an example. In order to verify the effectiveness of the proposed method, the source-grid-load-storage integrated demonstration project in the example plans a total of 150MW wind power and 200MWp photovoltaic power, and supporting energy storage equipment to supply power to a chemical enterprise with a load scale of 210MW. According to the requirements of the power grid, the peak-to-valley difference rate of the power received by this project from the public power grid should not be higher than the natural peak-to-valley difference rate of the load. Therefore, the natural peak-to-valley difference rate of the load will be used as the adjustment target in the future. The peak-to-valley difference rate of the source-grid-load-storage integrated system will be adjusted for four scenarios: only energy storage can be adjusted, load and energy storage can be adjusted, new energy and energy storage can be adjusted, and new energy, load and energy storage can be adjusted. Next, it is verified through a typical day scenario, and the typical day new energy output curve and load power consumption curve and corresponding data are selected for analysis, and then it is verified that under the adjustment strategy proposed in the present invention, the peak-to-valley difference rate of the power received by the system from the public power grid is not higher than the natural peak-to-valley difference rate of the load.

[0049] The typical day wind power, photovoltaic output and load characteristics are shown in Table 1.

[0050] Table 1 Typical daily operation data table (unit: MW)

[0051]

[0052]

[0053] Step 1:

[0054] According to the peak-to-valley rate calculation model of external power supply of source-grid-load-storage system:

[0055]

[0056] For the typical daily load and renewable energy generation information shown in Table 1, it can be seen that when the energy storage is not charged or discharged, P B =0MW, then from Table 1 we can know that T max =19, T min =12, that is, the peak time of external power supply of the source-grid-load-storage system is 19:00 in a day, at this time:

[0057]

[0058] It can be further concluded that the peak-to-valley difference of the system's external power supply when energy storage is not considered is 0.902. Since the natural peak-to-valley difference of the load is 0.353, it is necessary to further adjust the peak-to-valley difference to meet the grid connection requirements.

[0059] Step 2: Analyze the impact of the peak and valley values ​​of the source-grid-load-storage integrated system on the peak-to-valley difference rate.

[0060] The partial derivative of the peak-to-valley difference rate with respect to the peak and valley values ​​is calculated as:

[0061]

[0062] Since the peak-to-valley difference rate varies with the peak value P max Decrease and increase, with the valley value P min Increase and decrease, then in order to reduce the peak-to-valley difference rate, the peak value can be reduced and the valley value can be increased;

[0063] The target peak-valley value of the source-grid-load-storage integrated system can be calculated as follows:

[0064] (1) According to the sensitivity of the peak-to-valley value relative to the peak-to-valley difference rate and considering the total amount of control adjustment, the adjustment amount of the current peak-to-valley value is solved:

[0065]

[0066] Where f′(P max +ΔP max ,P min +ΔP min ) is the peak-to-valley difference rate after peak and valley value adjustment, ΔP max is the peak value adjustment, ΔP min is the adjustment amount for the valley value, The average value of external power received during the regulation period without considering the charging and discharging of energy storage. When the difference between the new peak and valley values ​​and the average value is equal, the control adjustment amount can be relatively small. If there is no solution to the above formula, the principle of further relaxation of regulation can be as follows:

[0067]

[0068] (2) Calculate the new peak and valley values, as well as the corresponding peak-to-valley difference rate:

[0069]

[0070] (3) Check whether the adjusted peak-to-valley difference rate satisfies the condition that it is less than the natural peak-to-valley difference rate of the load or less than a certain customized condition. If so, the current P max and P min This is the target peak-to-valley value. If it is not satisfied, return to step (1) and continue to adjust until the condition is satisfied.

[0071] The above calculation method results in a target peak value of 148.229MW and a target valley value of 96.112MW.

[0072] Step 3: Develop a method for adjusting the peak-to-valley rate of the integrated source-grid-load-storage system for different scenarios.

[0073] In order to make the peak-to-valley difference rate of the source-load-storage system smaller than the peak-to-valley difference rate of the initial load or a given value, according to the analysis results of steps 1 and 2, the adjustment target of the peak-to-valley value can be known. The control strategy is specifically formulated for different scenarios as follows:

[0074] (1) When the current state of charge of the energy storage meets the charging and discharging conditions, considering that peak load regulation is the main purpose of energy storage configuration, when the load and energy storage can be adjusted at the same time, the priority of energy storage regulation should be higher than the load response. Therefore, energy storage should be adjusted first: The external power receiving of the source-grid-load-storage integrated system follows the following calculation principles:

[0075]

[0076] According to the above formula, reduce P B Can increase P min , increase P B Can reduce P max , so charge and discharge operations are performed at the peak and valley moments to change P B Therefore, when only adjusting the energy storage, it can be done by increasing P at the peak moment. B To reduce the peak value, reduce P at the valley moment B To increase the valley value, and finally achieve the goal of reducing the peak-to-valley difference rate. It is worth noting that the energy storage charging and discharging operation should meet the condition that the charging and discharging power is not greater than its charging and discharging power limit, and should not exceed the maximum chargeable and dischargeable amount determined by the energy storage charge state;

[0077] (2) Verify whether the peak-to-valley difference rate of external power supply of the source-grid-load-storage integrated system meets the regulation requirements after energy storage regulation. When the peak regulation capacity of energy storage does not meet the demand, it is necessary to further adjust the adjustable part of the load:

[0078] Increase P L Can increase P min , reduce P L Can reduce P max Therefore, P can be reduced at the peak time L To reduce the peak value, continue to increase P at the valley moment L To increase the valley value, and finally achieve the goal of reducing the peak-to-valley difference rate;

[0079] (3) Check whether the peak-to-valley difference rate of external power supply of the source-grid-load-storage integrated system meets the regulation requirements after load regulation. When the peak-to-valley difference rate regulation requirements of energy storage and adjustable loads are not met, the output of new energy can be further adjusted. However, since the maximum output capacity of new energy units depends on environmental conditions and cannot be actively increased, the regulation of new energy output only includes power abandonment operations:

[0080] Reduce P G Can increase P min Therefore, when the output of new energy is reduced at the valley moment, the valley value can be further increased, and the goal of reducing the peak-to-valley difference rate can be finally achieved; Table 2 is a typical daily operation data table after considering the peak-to-valley difference rate to adjust the energy storage charging and discharging strategy and the load response strategy. It can be seen that after the implementation of the control strategy, the peak value of the external power receiving characteristic is 148.22MW, and the valley value is 96.11MW. It can be calculated that the peak-to-valley difference rate at this time is 0.351, which is less than the initial load peak-to-valley difference rate of 0.353, verifying the effectiveness of the proposed control method.

[0081] Table 2 Typical daily operation data after adjusting the peak-to-valley difference rate (unit: MW)

[0082] time Wind power Photovoltaic Initial load Energy storage charging and discharging Load response External power supply 0:00 53.4 0 134.570 8.75 6.15 96.11 1:00 62.1 0 138.045 8.75 11.39 96.11 2:00 42.8 0 140.265 0 0 97.46 3:00 29.2 0 143.748 0 0 114.58 4:00 10.2 0 148.041 0 0 137.81 5:00 11.9 0 152.334 0 0 140.41 6:00 17 0 150.702 0 0 133.71 7:00 18.4 0 156.010 0 0 137.58 8:00 11.7 17.512 166.621 0 0 137.37 9:00 4.9 72.473 169.537 0 3.92 96.11 10:00 10 99.843 172.453 0 33.49 96.11 11:00 22.9 115.870 175.369 0 59.54 96.11 12:00 44.7 114.130 178.528 0 76.40 96.11 13:00 23.6 106.730 181.687 0 44.71 96.11 14:00 4.5 70.632 147.483 0 23.72 96.11 15:00 0 13.256 149.846 0 0 136.59 16:00 0 0 160.581 -8.75 -3.60 148.22 17:00 0 0 174.932 -8.75 -17.95 148.22 18:00 0 0 189.107 -8.75 -32.10 148.22 19:00 3.3 0 204.001 -8.75 -43.71 148.22 20:00 8 0 207.646 0 -51.39 148.22 21:00 16.2 0 208.051 0 -43.58 148.22 22:00 65.2 0 201.873 0 0 136.65 23:00 50.6 0 201.731 0 -2.90 148.22

[0083] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A method for analyzing and adjusting the peak-to-valley difference rate in a source-grid-load-storage integrated system, characterized by the following step. Step 1: Establish a calculation model for the peak-to-valley difference rate in the source-grid-load-storage integrated system; Step 2: Based on the calculation model obtained in step 1, analyze the impact of the peak and valley values ​​of the source-grid-load-storage integrated system on the peak-valley difference rate and set the target peak-valley values. Step 3: Using the target peak-valley value obtained in step 2 as the regulation target, formulate a method for regulating the peak-valley difference rate of the source-grid-load-storage integrated system for different scenarios.

2. The method for analyzing and adjusting the peak-to-valley difference rate in a source-grid-load-storage integrated system according to claim 1, characterized in that: The step 1 is specifically as follows: in the source-grid-load-storage integrated system, the peak-valley difference rate is expressed as the ratio of the difference between the peak value and the valley value of the external power receiving characteristic within a day to the peak value. The peak value and valley value of the external power receiving characteristic are related to the output of new energy, load size and charging and discharging of energy storage within a day. The calculation model of the peak-valley difference rate in the source-grid-load-storage integrated system is: Where f(P max ,P min ) is the peak-to-valley difference rate of the external power receiving characteristics of the source-grid-load-storage integrated system, P max is the peak value of external power received by the source-grid-load-storage integrated system in one day, P min is the valley value of external power received by the source-grid-load-storage integrated system in one day, P L is the active power of the load, P G Contribute to the development of new energy; B is the charging and discharging power of the energy storage, the sign is positive when charging and negative when discharging; T max Peak P max The moment of appearance; T min is the moment when the valley value appears; Since the peak and valley values ​​of the source-grid-load-storage integrated system always meet P max ≥P min ≥0, and P max =P min = 0, f(P max ,P min )=0, the peak-to-valley difference rate calculation formula can be further converted into the following formula for analysis:

3. The method for analyzing and adjusting the peak-to-valley difference rate in a source-grid-load-storage integrated system according to claim 2, characterized in that: In step 2, according to formula (1.2), when the peak value is equal to 0, the valley value is also equal to 0, the peak-to-valley difference is the smallest, and no adjustment is applied; When the peak value is greater than 0, the peak-to-valley difference is The sensitivity of the peak-to-valley difference ratio to the peak and valley values ​​is calculated as: From equations (1.3) and (1.4), we can see that if the peak value and valley value are adjusted at the same time, the peak-to-valley difference rate changes with the peak value and valley value as follows: Since the valley value is greater than 0, The peak-to-valley difference rate varies with the peak value P max Decrease and increase, with the valley value P min Increase and decrease, then in order to reduce the peak-to-valley difference rate, the peak value can be reduced and the valley value can be increased; The target peak-valley value of the source-grid-load-storage integrated system is calculated as follows: 1) According to the sensitivity of the peak-to-valley value relative to the peak-to-valley difference rate and considering the total amount of control adjustment, the adjustment amount of the current peak-to-valley value is solved: Where f′(P max +ΔP max ,P min +ΔP min ) is the peak-to-valley difference rate after peak and valley value adjustment, ΔP max is the peak value adjustment, ΔP min is the adjustment amount of the valley value, P is the average value of the external power received during the adjustment period without considering the charging and discharging of energy storage. When the difference between the new peak value and the valley value and the average value is equal, the control adjustment amount can be relatively small; if there is no solution to the above formula, the principle of further relaxation of the adjustment can be as follows: 2) Calculate the new peak and valley values, as well as the corresponding peak-to-valley difference rate: 3) Check whether the adjusted peak-to-valley difference rate meets the condition that it is less than the natural peak-to-valley difference rate of the load or less than a certain customized condition. If it meets the condition, the current P max and P min This is the target peak-to-valley value; if it is not satisfied, return to step 1) and continue adjusting until the condition is met.

4. The method for analyzing and adjusting the peak-to-valley difference rate in a source-grid-load-storage integrated system according to claim 1, characterized in that: In step 3, for different scenarios, the control methods are as follows: 1) When the current state of charge of the energy storage meets the charging and discharging conditions, and when the load and energy storage can be adjusted at the same time, the priority of energy storage adjustment should be higher than the load response, so the energy storage should be adjusted first: From formula (1.1), we can know that the external power supply of the source-grid-load-storage integrated system follows the following calculation principles: According to formula (1.8), reduce P B Can increase P min , increase P B Can reduce P max Therefore, when only energy storage is regulated, by increasing P at the peak B To reduce the peak value, reduce P at the valley moment B To increase the valley value and ultimately achieve the goal of reducing the peak-to-valley difference rate, the energy storage charging and discharging operation should meet the condition that the charging and discharging power is not greater than its charging and discharging power limit, and should not exceed the maximum chargeable and dischargeable amount determined by the energy storage charge state; 2) Check whether the peak-to-valley difference rate of external power receiving of the source-grid-load-storage integrated system meets the regulation requirements after energy storage regulation. When the peak regulation capacity of energy storage does not meet the demand, it is necessary to further adjust the adjustable part of the load: According to formula (1.8), increasing P L Can increase P min , reduce P L Can reduce P max , therefore, reduce P at the peak moment L To reduce the peak value, continue to increase P at the valley moment L To increase the valley value, and finally achieve the goal of reducing the peak-to-valley difference rate; 3) Check whether the peak-to-valley difference rate of external power receiving of the source-grid-load-storage integrated system meets the regulation requirements after load regulation. When the peak-to-valley difference rate regulation requirements of energy storage and adjustable load are not met, further adjust the output of new energy. The regulation of the output of new energy only includes power abandonment operation: According to formula (1.8), reduce P G Can increase P min Therefore, reducing the output of renewable energy at the valley moment can further increase the valley value, and ultimately achieve the goal of reducing the peak-to-valley difference rate.

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