A energy storage control system for new energy power generation and consumption

Abstract

The present invention relates to the technical field of energy storage control. The present invention discloses an energy storage control system for new energy power generation consumption; it includes calculating the consumption control period of the energy storage system, obtaining the comprehensive energy consumption data of the power grid system during the control period, predicting the power consumption value in the next control period, and calculating the consumption demand value. According to the total power generation and the consumption demand value, the corresponding consumption control mode is selected to control the new energy power generation system and the energy storage system to supply power to the power grid system; compared with the prior art, the present invention can provide a basis for analyzing and determining whether there will be a shortage of power supply in the future of the power grid system, and reasonably formulate the corresponding consumption control mode and corresponding consumption power supply measures according to the total power generation of the new energy power generation system, ensuring that the new energy power generation system and the energy storage system can perform power scheduling operations in advance to the power grid system, preventing the phenomenon of insufficient power supply in the future of the power grid system.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage control. More specifically, the present invention relates to an energy storage control system for new energy power generation and consumption. Background Art

[0002] With the continuous progress of renewable energy, the proportion of new energy power generation in the power system is also increasing. Due to the intermittent and fluctuating characteristics of new energy power generation, new energy power generation cannot accurately and stably meet the large power consumption demand during the peak period of the power grid system, resulting in a phenomenon that the power grid system is prone to insufficient power supply. Therefore, energy storage control of the power grid system needs to be carried out through new energy power generation.

[0003] The patent application with the publication number CN117293867A discloses an energy storage control system for new energy power generation and consumption. Based on the energy storage configuration model of the new energy power generation energy storage system built, with the goal of maximizing revenue, it optimizes the model based on an improved coot optimization algorithm, realizes the optimal control of the new energy power generation energy storage system, solves the multi-objective and non-linear constraint problems in the energy storage configuration model, improves the ability of optimal configuration of new energy energy storage, and improves the control accuracy and control efficiency;

[0004] The existing energy storage control system analyzes the actual power supply situation of the power grid system by collecting real-time data affecting power supply and consumption in the energy storage system, so as to provide real-time data support for new energy power generation and consumption. For example, in the above patent application, it collects the real-time operation information of the new energy power generation energy storage system and performs corresponding optimal control of the new energy power generation energy storage system according to the optimization results of the improved coot algorithm to achieve the real-time energy storage control effect of new energy power generation and consumption. Since the power grid system is in a continuous and uninterrupted power supply state during normal operation, when using the real-time analysis method, it is impossible to predict in advance the phenomenon of insufficient power supply that will occur in the power grid system, so that the energy storage control operation of new energy power generation cannot be carried out before the power grid system is at the peak of electricity consumption and there is a phenomenon of insufficient power supply, resulting in a lag in the energy storage control operation of new energy power generation, and then making the power grid system prone to abnormal power shortage during the peak of electricity consumption, reducing the energy storage control effect of the power grid system.

[0005] In view of this, the present invention proposes an energy storage control system for new energy power generation and consumption to solve the above problems. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art and to achieve the above object, the present invention provides the following technical solution: An energy storage control system for new energy power generation and consumption, applied to an energy storage controller, includes:

[0007] A period calculation module, configured to obtain power supply and distribution characteristics from an energy storage system and a power grid system. The power supply and distribution characteristics include charge-discharge conversion duration, power imbalance interval duration, and standard control duration, and calculate the consumption control period of the energy storage system according to the power supply and distribution characteristics;

[0008] A data acquisition module, configured to divide the update control period into control time periods based on a time period division criterion, and obtain the comprehensive energy consumption data of the power grid system during the control time periods. The comprehensive energy consumption data includes time period type, temperature change value, high-energy user increment value, high electricity price duration, and current balance rate;

[0009] A prediction and determination module, configured to input the real-time comprehensive energy consumption data into a trained power consumption prediction model, predict the power consumption value of the next control time period, calculate the consumption demand value, and determine whether to perform a consumption control operation;

[0010] A mode selection module, configured to obtain the total power generation of a new energy power generation system, calculate a consumption difference value according to the total power generation and the consumption demand value, and select a corresponding consumption control mode. The consumption control modes include an independent consumption mode and a combined consumption mode;

[0011] A consumption control module, configured to control the new energy power generation system and the energy storage system to supply power to the power grid system according to different consumption control modes, so as to achieve the energy storage control purpose of new energy power generation consumption.

[0012] Further, the method for obtaining the charge-discharge conversion duration includes:

[0013] Query all charge-discharge events in the energy storage system through a power database, identify the event attributes of all charge-discharge events one by one, and record the charge-discharge events with the event attribute of effective charge and discharge as target events, obtaining A target events;

[0014] Query the moment when the discharge information is first received in the A target events one by one through timestamps, obtaining A demand moments;

[0015] After the A demand moments, when no external discharge occurs within a preset discharge duration, record the moment of the last external discharge as the end moment, obtaining A end moments;

[0016] Record the duration between the A demand moments and the A end moments as sub-durations, and record the maximum value of the A sub-durations as the charge-discharge conversion duration.

[0017] Further, the method for obtaining the power imbalance interval duration includes:

[0018] Detect the real-time operating power of the power grid system through a power sensor, and record it as the power supply power;

[0019] Query the lower limit of the operating power of the power grid system through the technical parameter table, and record the power supply power that is less than the lower limit as unbalanced power;

[0020] The time when the power imbalance occurs in the power grid system is queried one by one through the timestamp, and B imbalance moments are obtained. The time between the last imbalance moment and the next imbalance moment is recorded as the sub-interval duration, and B-1 sub-interval durations are obtained;

[0021] Remove the maximum and minimum sub-interval durations, and average the remaining B-3 sub-interval durations to obtain the power imbalance interval duration.

[0022] The expression of power imbalance interval duration is:

[0023]

[0024] Where, SC sh is the power imbalance interval duration, SC jgb is the duration of the b-th subinterval;

[0025] The expression of the absorption control period is:

[0026] ZQ xn =Sc bz +ρ1*SC cf -ρ2*SC sh ;

[0027] Where ZQ xn To accommodate the control cycle, SC bz is the standard control time, SC cf is the charge-discharge conversion time, ρ1 and ρ2 are weight factors greater than 0.

[0028] Furthermore, the time period division criterion is: the duration of each control period is equal, and the end time of the previous control period and the start time of the next control period are adjacent times;

[0029] Time period types include peak period, off-peak period and off-peak period.

[0030] Furthermore, the methods for obtaining the added value of high-energy households include:

[0031] The power consumption of all electricity users in the power grid system is queried one by one through the power database, and the basic power consumption of the power grid system is queried through the technical parameter table. The real-time power consumption is obtained by subtracting the user power consumption from the basic power consumption.

[0032] The expression of real-time power consumption is:

[0033] YD ss =YD yh-YD jc ;

[0034] Wherein, YD ss is the real-time power consumption, YD yh is the user power consumption, and YD jc is the basic power consumption;

[0035] Compare the real-time power consumption with the high power threshold, and record the electricity users with real-time power consumption greater than the high power threshold as high-energy users;

[0036] At the start and end times of D control periods, respectively count the number of high-energy users in the power grid system to obtain D start values and D end values;

[0037] After subtracting the D end values from the D start values respectively, obtain D high-energy user increase values;

[0038] The expression of the high-energy user increase value is:

[0039] GN zid =ZZ zd -OS zd ;

[0040] Wherein, GN zjd is the high-energy user increase value of the dth control period, d = 1, 2... D, ZZ zd is the end value of the dth control period, and QS zd is the start value of the dth control period.

[0041] Furthermore, the method for obtaining the current balance rate includes:

[0042] Use a current sensor to detect the branch current of C load branches in the power grid system in real time, and after adding up the C branch currents one by one, obtain the supply current;

[0043] Record the supply current between the current lower limit value and the current upper limit value as the balanced current, and mark the moments when the balanced current appears one by one during the control period, denoted as the balanced moments;

[0044] After adding up all the balanced moments in the D control periods in sequence, obtain D balanced durations, and after comparing the D balanced durations with the duration of the control period respectively, obtain D current balance rates;

[0045] The expression of the current balance rate is:

[0046]

[0047] Wherein, DL jhd is the current balance rate of the dth control period, and SC jhdis the equalization duration for the d-th control period, SC sd is the duration of the control period.

[0048] Furthermore, the training method of the power consumption prediction model includes:

[0049] Pre-collect multiple sets of comprehensive energy consumption data and the corresponding power consumption values, and number the time period types;

[0050] Convert the comprehensive energy consumption data into multiple feature vectors using the sliding window method, convert the power consumption values into labels corresponding to the comprehensive energy consumption data according to the sliding step, one feature vector corresponds to one label, and form a set of training data. Multiple sets of training data form a training set. Arrange the comprehensive energy consumption data in the order of collection time, and preset the prediction time step Q, the sliding step W, and the sliding window length Y;

[0051] Use the feature vectors as the input of the model, use the power consumption value of the next control period after the prediction time step Q as the output, use the subsequent power consumption values of each training set as the prediction target, use the sum of the minimized prediction errors as the training target, train the model, and generate a power consumption prediction model that predicts the power consumption value of the next control period based on the comprehensive energy consumption data of the previous control period.

[0052] Furthermore, the determination method of whether to perform the accommodation control operation includes:

[0053] Subtract the predicted power consumption value of the next control period from the maximum power supply value to obtain the accommodation demand value;

[0054] The expression of the accommodation demand value is:

[0055] XN xq = XH yc - GJ zd ;

[0056] In the formula, XN xq is the accommodation demand value, XH yc is the predicted power consumption value of the next control period, and GJ zd is the maximum power supply value;

[0057] When XN xq is greater than 0, it is determined to perform the accommodation control operation;

[0058] When XN xq is less than or equal to 0, it is determined not to perform the accommodation control operation.

[0059] Furthermore, the calculation method of the accommodation difference value includes:

[0060] The sub - power generation of E new - energy power stations is counted through the power database, and after adding the E sub - power generations one by one, the total power generation is generated;

[0061] The expression of the total power generation is:

[0062]

[0063] In the formula, FD zl is the total power generation, and FD ze is the e - th sub - power generation;

[0064] After subtracting the total power generation from the consumption demand value, the consumption difference value is obtained;

[0065] The expression of the consumption difference value is:

[0066] XN ce =FD zl -XN xq ;

[0067] In the formula, XN ce is the consumption difference value;

[0068] The selection methods of the independent consumption mode and the combined consumption mode include:

[0069] When XN ce is greater than or equal to 0, select the independent consumption mode;

[0070] When XN ce is less than 0, select the combined consumption mode.

[0071] Furthermore, the control method for supplying power to the power grid system includes:

[0072] When the independent consumption mode is selected, the electric energy in the new - energy power generation system is dispatched to the power grid system until the consumption demand value is equal to 0, then the power dispatch stops, and all the remaining electric energy in the new - energy power generation system is dispatched to the energy storage system for storage;

[0073] When the combined dispatch mode is selected, first, all the electric energy in the new - energy power generation system is dispatched to the power grid system, and then, part of the electric energy in the energy storage system is dispatched to the power grid system until the consumption demand value is equal to 0 and the power dispatch stops.

[0074] The technical effects and advantages of an energy storage control system for new - energy power generation consumption in the present invention:

[0075] By obtaining the power supply and distribution characteristics from the energy storage system and the power grid system and calculating the consumption control period of the energy storage system, the present invention can not only avoid the negative interference of a large amount of useless data on the calculation of the consumption control period, but also improve the calculation accuracy of the consumption control period, thereby clarifying the acquisition time range of relevant data for subsequent new energy power generation consumption energy storage control, ensuring the rationality and accuracy of relevant data acquisition, and by obtaining the comprehensive energy consumption data of the power grid system during the control period and combining the power consumption prediction model to predict the power consumption value of the power grid system at a future moment, it is possible to provide a basis for analyzing and determining whether there will be a shortage of power supply in the power grid system at a future moment, and reasonably formulate the corresponding consumption control mode and the corresponding consumption power supply measures according to the total power generation of the new energy power generation system, ensuring that the new energy power generation system and the energy storage system can perform accurate power scheduling operations in advance to the power grid system, preventing the phenomenon of power supply shortage in the power grid system at a future moment, and thus achieving the effect of the energy storage system on the new energy consumption control during the peak power consumption of the power grid, and finally achieving the purpose of optimizing power storage and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 FIG. is a schematic structural diagram of an energy storage control system for new energy power generation consumption provided in Embodiment 1 of the present invention;

[0077] Figure 2 FIG. is a schematic block diagram of an energy storage control system for new energy power generation consumption provided in Embodiment 1 of the present invention;

[0078] Figure 3 FIG. is a schematic flow diagram of an energy storage control method for new energy power generation consumption provided in Embodiment 2 of the present invention;

[0079] Figure 4 FIG. is a schematic structural diagram of an electronic device provided in Embodiment 3 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0080] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0081] Embodiment 1: Please refer to Figure 1 and Figure 2 As shown, an energy storage control system for new energy power generation consumption described in this embodiment is applied to an energy storage controller and includes:

[0082] The period calculation module obtains the power supply and distribution characteristics from the energy storage system and the power grid system, and calculates the consumption control period of the energy storage system according to the power supply and distribution characteristics;

[0083] The energy storage system refers to an energy storage system that can receive and store the electric energy generated by various new energy power generation behaviors, and orderly dispatch the stored electric energy to the power grid system as needed to provide it to electricity users, so as to achieve the effect of bridging between the new energy power generation system and the power grid system;

[0084] The power supply and distribution characteristics are data that can affect the duration of the subsequent consumption operation of the energy storage system in the energy storage system and the power grid system, and provide an accurate data basis for the subsequent consumption control period;

[0085] The power supply and distribution characteristics include the charge-discharge conversion duration, the power imbalance interval duration, and the standard control duration;

[0086] The charge-discharge conversion duration refers to the maximum duration required for the energy storage system to convert the stored electric energy from the storage state to the discharge state, which can represent the length of time for the charge-discharge conversion of the energy storage system. When the charge-discharge conversion duration is longer, the duration corresponding to the consumption operation of the energy storage system is longer, and the consumption control period is larger;

[0087] The methods for obtaining the charge-discharge conversion duration include:

[0088] Query all charge-discharge events in the energy storage system through the power database, identify the event attributes of all charge-discharge events one by one, and record the charge-discharge events with the event attribute of effective charge-discharge as target events to obtain A target events; Charge-discharge events are used to record the charging and discharging processes in the energy storage system, so as to represent the relevant data of charge-discharge. Event attributes are used to represent whether the charge-discharge events have passed the safety certification. Event attributes include effective charge-discharge and invalid charge-discharge. Effective charge-discharge means that the charge-discharge event has passed the safety certification, and the data in this event can be reasonably retrieved and used. Invalid charge-discharge means that the charge-discharge event has not passed the safety certification, and the data in this event cannot be reasonably retrieved and used;

[0089] Query the moment when the discharge information is first received in A target events one by one through the time stamp to obtain A demand moments;

[0090] After the A demand moments, when there is no further external discharge within the preset discharge duration, record the moment of the last external discharge as the end moment to obtain A end moments; The preset discharge duration refers to the maximum discharge interruption duration allowed during the external discharge process, which can represent the interruption duration of the external discharge, so as to improve the accuracy of the end moment;

[0091] The duration between the A demand moments and the A end moments is denoted as the sub-duration, and the maximum value among the A sub-durations is denoted as the charge-discharge conversion duration.

[0092] The power imbalance interval duration refers to the interval duration between two power supply imbalance phenomena in the power grid system, which can represent the stability of the power supply power of the power grid system. When the power imbalance interval duration is larger, the corresponding duration of the absorption operation of the energy storage system is smaller, and the absorption control period is smaller.

[0093] The method for obtaining the power imbalance interval duration includes:

[0094] Detect the real-time operating power of the power grid system through a power sensor, denoted as the power supply power.

[0095] Query the lower limit value of the operating power of the power grid system through the technical parameter table, and denote the power supply power less than the lower limit value of the operating power as the imbalance power; the lower limit value of the operating power is used to represent the lowest safe operating power in the power grid system, thereby providing a limit basis for the minimum value of the power supply power.

[0096] Query the moments when the imbalance power appears in the power grid system one by one through the time stamp, obtain B imbalance moments, and denote the duration between the previous imbalance moment and the next imbalance moment as the sub-interval duration, and obtain B - 1 sub-interval durations.

[0097] Remove the maximum value and the minimum value of the sub-interval duration, and sum up the remaining B - 3 sub-interval durations and then take the average to obtain the power imbalance interval duration.

[0098] The expression for the power imbalance interval duration is:

[0099]

[0100] In the formula, SC sh is the power imbalance interval duration, SC jgb is the bth sub-interval duration.

[0101] The standard control duration refers to the standard data used to represent the shortest duration for the absorption control of new energy power generation in the energy storage system, which can be used as the basis for subsequent calculation of the absorption control period, so that the standard control duration can be effectively combined with the charge-discharge conversion duration and the power imbalance interval duration; the standard control duration is obtained by querying the technical parameter table of the energy storage system.

[0102] The absorption control period is used to represent the longest operation duration when performing the absorption operation of new energy power generation in the energy storage system, and is used as the limited duration for data acquisition when performing the absorption operation on the power grid system subsequently, so as to ensure the rationality of subsequent data acquisition.

[0103] The expression for the absorption control period is:

[0104] ZQ xn = SC bz + ρ1 * SC cf - ρ2 * SC sh ;

[0105] Wherein, ZQ xn is the consumption control period, SC bz is the standard control duration, SC cf is the charge-discharge conversion duration, and ρ1, ρ2 are weight factors greater than 0;

[0106] Among them, ρ1 + ρ2 = 1. The settings of ρ1 and ρ2 are to balance the influence of the charge-discharge conversion duration and the power imbalance interval duration within the consumption control period, that is, to ensure that the changes in the charge-discharge conversion duration and the power imbalance interval duration can cause corresponding changes in the consumption control period, thereby improving the accuracy of the consumption control period.

[0107] The data acquisition module divides the update control period into control time periods based on the time period division criterion and obtains the comprehensive energy consumption data of the power grid system during the control time periods. The comprehensive energy consumption data includes time period type, temperature change value, high-energy user increment, high electricity price duration, and current balance rate;

[0108] When the consumption control period is obtained, the time span corresponding to the consumption control period is relatively large at this time, and the types and quantities of various data included in the consumption control period are also relatively large, making the evaluation and analysis process of the new energy power generation consumption operation in the consumption control period relatively broad, resulting in a relatively rough operation of the new energy power generation consumption. In order to reduce the types and quantities of data in each time period and to achieve refined operation of the new energy power generation consumption, it is necessary to divide the consumption control period into D control time periods with a relatively small time span; for example, when the consumption control period is 24 hours, the control time period is 1 hour, and when the consumption control period is 1 hour, the control time period is 10 minutes; when dividing the consumption control period into control time periods, it is necessary to carry out under the restriction of the time period division criterion to ensure that the duration corresponding to each control time period is equal and adjacent control time periods are continuous on the time line;

[0109] In summary, the time period division criterion is: the duration of each control time period is equal, and the termination moment of the previous control time period and the start moment of the next control time period are adjacent moments; the start moment refers to the first moment in the control time period, and the termination moment refers to the last moment in the control time period, thereby ensuring the continuity of two adjacent control time periods.

[0110] The comprehensive energy consumption data refers to the relevant data that can affect the total power consumption of the power grid system during the control period, and thus can be used as the basis for subsequent judgment on whether the energy storage system conducts new energy power consumption to the power grid system;

[0111] The comprehensive energy consumption data includes time period type, temperature change value, high-energy user increment value, high electricity price duration, and current balance rate;

[0112] The time period type refers to the different states of the power consumption of electricity users in the power grid system during the peak, flat, or low valley of power consumption in each control period, that is, it can represent the power consumption type of each control period, and the power grid system will have corresponding different power consumption when in different time period types. Exemplarily, when the control period is in the peak power consumption period, the power consumption of electricity users in the power grid system will be larger at this time, and the power demand for the power grid system will be greater. When the control period is in the low valley power consumption period, the power consumption of electricity users in the power grid system will be smaller at this time, and the power demand for the power grid system will be smaller; The time period type includes peak period, flat peak period, and low valley period; The time period type is obtained by querying the time points of D control periods.

[0113] The temperature change value refers to the difference between the maximum environmental temperature and the minimum environmental temperature of the power grid system in different control periods, that is, it can numerically represent the environmental temperature change situation of the power grid system in different control periods. When the temperature change value is larger, electricity users in the power grid system need to consume more electricity for heating operations, and the power demand for the power grid system will be greater; The temperature change value is obtained by detecting the maximum environmental temperature and the minimum environmental temperature of D control periods by a temperature sensor and calculating their difference.

[0114] The high-energy user increment value refers to the magnitude of the increase in the number of electricity users in the high power consumption state of the power grid system in different control periods, that is, it can represent the number of high-energy electricity users corresponding to different control periods. When the high-energy user increment value is larger, the number of electricity users in the high power consumption state increases more, and the power demand for the power grid system will be greater;

[0115] The obtaining method of the high-energy user increment value includes:

[0116] Query the user power consumption of all electricity users in the power grid system one by one through the power database, and query the basic power consumption of the power grid system through the technical parameter table. After subtracting the basic power consumption from the user power consumption, the real-time power consumption is obtained; The basic power consumption refers to the power consumption required for the power grid system to achieve the most basic safe operation, so that the basic power consumption can represent the power consumption of the power grid system itself;

[0117] The expression of the real-time power consumption is:

[0118] YD ss =YDyh -YD jc ;

[0119] In the formula, YD ss is the real-time electricity consumption, YD yh is the electricity consumption of users, and YD jc is the basic electricity consumption;

[0120] Compare the real-time electricity consumption with the high electricity consumption threshold, and record the electricity users with real-time electricity consumption greater than the high electricity consumption threshold as high-energy users; the high electricity consumption threshold refers to the maximum electricity consumption of electricity users in the power grid system within a certain period of time, and is used as the identification basis for high-energy users; the high electricity consumption threshold is obtained by collecting the maximum value of the electricity consumption of a large number of electricity users identified as high-energy users in history and then calculating their average value;

[0121] At the start and end times of D control periods, respectively count the number of high-energy users in the power grid system to obtain D starting values and D ending values;

[0122] After subtracting the D ending values from the D starting values respectively, obtain D high-energy user increment values;

[0123] The expression of the high-energy user increment value is:

[0124] GN zid =ZZ zd -QS zd ;

[0125] In the formula, GN zjd is the high-energy user increment value of the d-th control period, d = 1, 2... D, ZZ zd is the ending value of the d-th control period, and QS zd is the starting value of the d-th control period.

[0126] The high electricity price duration refers to the duration during which the electricity price in the power grid system is at a high price in different control periods, that is, it can represent the duration corresponding to the high electricity price in different control periods. When the high electricity price duration is longer, the electricity unit price of electricity users in the power grid system is higher, and the electricity demand of electricity users for the power grid system is smaller; the high electricity price duration is obtained by querying the duration corresponding to the unit electricity price at a high price within D control periods.

[0127] The current balance rate refers to the ratio between the duration of dynamic balanced power supply to electricity users in the power grid system in different control periods and the total duration, that is, it can represent the supply current of the power grid system in different control periods. When the current balance rate is larger, the duration of dynamic balanced power supply is longer, and the electricity demand of electricity users for the power grid system is larger;

[0128] The method for obtaining the current balance rate includes:

[0129] The branch currents of C load branches in the power grid system are detected in real time by a current sensor, and after the C branch currents are accumulated one by one, the supply current is obtained;

[0130] The supply current between the current lower limit value and the current upper limit value is recorded as the balanced current, and the moments when the balanced current appears are marked one by one within the control period, which are recorded as the balanced moments; the current lower limit value and the current upper limit value refer to the minimum and maximum values of the supply current recognized as the balanced current, which can provide limit values for the magnitude range of the balanced current to ensure the accuracy of subsequent balanced current recognition;

[0131] After all the balanced moments within D control periods are accumulated in sequence, D balanced durations are obtained, and after the D balanced durations are respectively compared with the duration of the control period, D current balance rates are obtained;

[0132] The expression of the current balance rate is:

[0133]

[0134] In the formula, DL jhd is the current balance rate of the d-th control period, SC jhd is the balanced duration of the d-th control period, SC sd is the duration of the control period.

[0135] The prediction and determination module inputs the real-time comprehensive energy consumption data into the trained power consumption prediction model, predicts the power consumption value of the next control period, calculates the accommodation demand value, and determines whether to perform the accommodation control operation;

[0136] After obtaining the real-time comprehensive energy consumption data, the real-time comprehensive energy consumption data can be input into the power consumption prediction model, so that the power consumption prediction model can quickly and accurately predict the power consumption value of the next control period according to the input comprehensive energy consumption data, and then use the power consumption value as the basis for subsequent new energy power generation accommodation;

[0137] The power consumption value is the power consumption in the power grid system corresponding to the time period type, temperature change value, high-energy user increment value, high electricity price duration, and current balance rate, and is used as the output value of the power consumption prediction model; the power consumption value is obtained by collecting the power consumption of the power grid system under the time period type, temperature change value, high-energy user increment value, high electricity price duration, and current balance rate through an electricity meter.

[0138] The power consumption prediction model is a machine learning model trained according to a large amount of historical time period types, temperature change values, high-energy user increment values, high electricity price durations, and current balance rates and the corresponding power consumption values;

[0139] The training method of the electric energy consumption prediction model includes:

[0140] Pre-collect multiple sets of comprehensive energy consumption data and the corresponding electric energy consumption values, and number the time period types. Exemplarily, number the peak period as 1, the flat peak period as 2, and the valley period as 3;

[0141] Convert the comprehensive energy consumption data into multiple feature vectors using the sliding window method, convert the electric energy consumption value into a label corresponding to the comprehensive energy consumption data according to the sliding step length. One feature vector corresponds to one label, and a set of training data is formed. Multiple sets of training data form a training set. Arrange the comprehensive energy consumption data in the order of collection time, and preset the prediction time step Q, the sliding step length W, and the sliding window length Y;

[0142] Use the feature vector as the input of the model, use the electric energy consumption value of the next control period after the prediction time step Q as the output, use the subsequent electric energy consumption values of each training set as the prediction target, use the sum of minimized prediction errors as the training target, and train the model to generate an electric energy consumption prediction model that predicts the electric energy consumption value of the next control period based on the comprehensive energy consumption data of the previous control period.

[0143] Exemplarily, the electric energy consumption prediction model adopts any one of CNN or AlexNet;

[0144] The calculation formula of the prediction error is:

[0145] zk = (ak - wk) 2 ;

[0146] In the formula, zk is the prediction error, k is the group number of the feature vector; ak is the predicted state value corresponding to the kth group of feature vectors, and wk is the actual state value corresponding to the kth group of training data;

[0147] Exemplarily, a simple example of the sliding window method is as follows: Suppose we want to use the comprehensive energy consumption data (Q11, Q22, Q33, Q44, Q55) to train a time prediction model to predict the value of the next 1 time step. We can use a sliding window with a length of 3 and a sliding step length of 1 to generate the prediction future training set and prediction target. For example: the training sets are (Q11, Q22, Q33) and (Q22, Q33, Q44), and the prediction targets are (E44) and (E55). E44 is the electric energy consumption value corresponding to the comprehensive energy consumption data of the next control period of the control period where Q33 is located, and E55 is the electric energy consumption value corresponding to the comprehensive energy consumption data of the next control period of the control period where Q44 is located.

[0148] After predicting the power consumption value for the next control period, it is necessary to compare and analyze the predicted power consumption value to calculate the absorption demand value, and determine whether to execute the absorption control operation based on the absorption demand value. The execution of the absorption control operation is an operation that the power grid system performs only when the power supply in the next control period is insufficient.

[0149] The determination method for whether to execute the absorption control operation includes:

[0150] After subtracting the predicted power consumption value for the next control period from the maximum power supply value, the absorption demand value is obtained; the maximum power supply value refers to the maximum amount of electricity that can be provided to the power grid system in the energy storage system, which is obtained through querying the power database.

[0151] The expression for the absorption demand value is:

[0152] XN xq =XH yc -GJ zd ;

[0153] In the formula, XN xq is the absorption demand value, XH yc is the predicted power consumption value for the next control period, and GJ zd is the maximum power supply value;

[0154] When XN xq is greater than 0, it indicates that the predicted power consumption value for the next control period is greater than the maximum power supply value. At this time, the power grid system will have a large power consumption situation in the next control period, and the power grid system will have a power supply shortage phenomenon in the future, so it is determined to execute the absorption control operation;

[0155] When XN xq is less than or equal to 0, it indicates that the predicted power consumption value for the next control period is less than or equal to the maximum power supply value. At this time, the power grid system will not have a large power consumption situation in the next control period, and the power grid system will not have a power supply shortage phenomenon in the future, so it is determined not to execute the absorption control operation.

[0156] The mode selection module obtains the total power generation of the new energy power generation system, calculates the absorption difference value according to the total power generation and the absorption demand value, and selects the corresponding absorption control mode; the absorption control mode includes the independent absorption mode and the combined absorption mode;

[0157] When performing the accommodation control operation, it is necessary to obtain the total power generation of the new energy power generation system. The total power generation refers to the overall power generation of all power generation equipment in the new energy power generation system, including but not limited to solar power generation, hydroelectric power generation, wind power generation, etc., so as to act as a supplier of electric energy to the power grid system and realize the accommodation operation of new energy power generation;

[0158] The accommodation difference value refers to the difference between the total power generation and the accommodation demand value, and serves as the basis for subsequent different accommodation operations on new energy power generation;

[0159] The calculation method of the accommodation difference value includes:

[0160] Statistically obtain the sub-power generations of E new energy power stations through the power database, and after adding up the E sub-power generations one by one, generate the total power generation;

[0161] The expression of the total power generation is:

[0162]

[0163] In the formula, FD zl is the total power generation, and FD ze is the e-th sub-power generation;

[0164] After subtracting the accommodation demand value from the total power generation, obtain the accommodation difference value;

[0165] The expression of the accommodation difference value is:

[0166] XN ce =FD zl -XN xq ;

[0167] In the formula, XN ce is the accommodation difference value.

[0168] When the accommodation difference value is calculated, the subsequent accommodation control mode can be selected according to the size of the accommodation difference value, so that different accommodation control modes can correspond to different accommodation control means, and then provide guiding opinions for the subsequent specific accommodation means;

[0169] The accommodation control modes include the independent accommodation mode and the combined accommodation mode; the independent accommodation mode refers to the power supply accommodation operation to the power grid system only through the electric energy of the new energy power generation system, without the need for combined power supply accommodation operation with the energy storage system, and the combined accommodation mode refers to the power supply accommodation operation to the power grid system through the electric energy of the new energy power generation system and the energy storage system, and requires combined power supply accommodation operation with the energy storage system;

[0170] The selection methods of the independent accommodation mode and the combined accommodation mode include:

[0171] When XNce When it is greater than or equal to 0, the total power generation of the new energy power generation system is greater than or equal to the consumption demand value at this time. Then the new energy power generation system can independently supply power to the power grid system for separate power consumption operations, and the independent consumption mode is selected.

[0172] When XN ce When it is less than 0, the total power generation of the new energy power generation system is less than the consumption demand value at this time. Then the new energy power generation system cannot independently supply power to the power grid system for separate power consumption operations and needs to cooperate with the energy storage system for power supply and consumption, and the combined consumption mode is selected.

[0173] The consumption control module controls the new energy power generation system and the energy storage system to supply power to the power grid system according to different consumption control modes, achieving the energy storage control purpose of new energy power generation consumption.

[0174] When the independent consumption mode is selected, only the electric energy generated in the new energy power generation system needs to be independently supplied to the power grid system at this time, and the independent consumption effect of new energy power generation can be achieved. When the combined consumption mode is selected, the electric energy generated in the new energy power generation system and the energy storage system needs to be combinedly supplied to the power grid system at this time to achieve the combined consumption effect of new energy power generation, so as to finally achieve the energy storage control purpose of new energy power generation consumption, ensure that the power grid system can maintain the dynamic balance of power supply, improve the rationality of power storage and use, and greatly improve the power utilization rate.

[0175] The control method for supplying power to the power grid system includes:

[0176] When the independent consumption mode is selected, only the electric energy generated in the new energy power generation system needs to be independently supplied to the power grid system at this time. Then the electric energy in the new energy power generation system is dispatched to the power grid system until the power consumption demand value is equal to 0, and the remaining electric energy in the new energy power generation system is all dispatched to the energy storage system for storage.

[0177] When the combined dispatching mode is selected, the electric energy in the new energy power generation system and the energy storage system needs to be combinedly supplied to the power grid system at this time. First, all the electric energy in the new energy power generation system is dispatched to the power grid system, and then part of the electric energy in the energy storage system is dispatched to the power grid system until the power consumption demand value is equal to 0 and the power dispatching is stopped.

[0178] Through the independent or combined power dispatching operations of the new energy power generation system and the energy storage system, the efficient and accurate consumption control effect of new energy power generation can be achieved, ensuring that the power supply on the power grid system can meet the power demand during the peak power consumption period, thus realizing the effect of the energy storage system on the new energy consumption control during the peak power consumption period of the power grid, and finally achieving the purpose of optimizing power storage and use.

[0179] In this embodiment, by obtaining the power supply and distribution characteristics from the energy storage system and the power grid system and calculating the consumption control period of the energy storage system, a large amount of useless data can be avoided from negatively interfering with the calculation of the consumption control period, and at the same time, the calculation accuracy of the consumption control period can be improved. Thus, the acquisition time range of relevant data for subsequent new energy power generation consumption energy storage control is clarified, ensuring the rationality and accuracy of relevant data acquisition. By obtaining the comprehensive energy consumption data of the power grid system during the control period and combining the power consumption prediction model to predict the power consumption value of the power grid system at a future moment, a basis for analyzing and determining whether there will be a shortage of power supply at a future moment of the power grid system can be provided. And according to the total power generation of the new energy power generation system, the corresponding consumption control mode and the corresponding consumption power supply measures can be reasonably formulated to ensure that the new energy power generation system and the energy storage system can advance the power dispatching operation to the power grid system, preventing the phenomenon of power supply shortage in the power grid system at a future moment. Furthermore, the effect of the energy storage system on the consumption control of new energy during the peak power consumption of the power grid is achieved, and ultimately the purpose of optimizing power storage and use is achieved.

[0180] Embodiment 2: Please refer to Figure 3 As shown, for the parts not described in detail in this embodiment, refer to the description content of Embodiment 1. A method for controlling energy storage for new energy power generation consumption is provided, which is applied to an energy storage controller and implemented based on a control system for energy storage for new energy power generation consumption, including:

[0181] S1: Obtain the power supply and distribution characteristics from the energy storage system and the power grid system. The power supply and distribution characteristics include the charge-discharge conversion duration, the power imbalance interval duration, and the standard control duration, and calculate the consumption control period of the energy storage system according to the power supply and distribution characteristics;

[0182] S2: Based on the time period division criterion, divide the updated control period into control periods, and obtain the comprehensive energy consumption data of the power grid system during the control period. The comprehensive energy consumption data includes the time period type, the temperature change value, the increase value of high-energy users, the high electricity price duration, and the current balance rate;

[0183] S3: Input the real-time comprehensive energy consumption data into the trained power consumption prediction model to predict the power consumption value of the next control period, calculate the consumption demand value, and determine whether to perform the consumption control operation;

[0184] S4: If the consumption control operation is to be performed, obtain the total power generation of the new energy power generation system, calculate the consumption difference value according to the total power generation and the consumption demand value, and select the corresponding consumption control mode. The consumption control mode includes the independent consumption mode and the combined consumption mode;

[0185] S5: According to different consumption control modes, control the new energy power generation system and the energy storage system to supply power to the power grid system, so as to achieve the energy storage control purpose of new energy power generation consumption.

[0186] Embodiment 3: Please refer to Figure 4 As shown in the figure, this embodiment publicly provides an electronic device, including a processor and a memory;

[0187] Wherein, a computer program that can be called by the processor is stored in the memory;

[0188] The processor executes the above-mentioned energy storage control method for new energy power generation consumption by calling the computer program stored in the memory.

[0189] Since the electronic device introduced in this embodiment is the electronic device used to implement the energy storage control method for new energy power generation consumption in the second embodiment of the present application, based on the energy storage control method for new energy power generation consumption introduced in the embodiments of the present application, those skilled in the art can understand the specific implementation manners and various variations of the electronic device in this embodiment. Therefore, the specific implementation of how this electronic device implements the method in the embodiments of the present application will not be described in detail here. As long as those skilled in the art implement the electronic device used for the energy storage control method for new energy power generation consumption in the embodiments of the present application, it falls within the scope of protection of the present application.

[0190] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, and all should be covered by the protection scope of the present invention.

Claims

1. A energy storage control system for new energy power generation and consumption, applied to an energy storage controller, characterized in that, Including: A period calculation module, configured to obtain power supply and distribution characteristics from an energy storage system and a power grid system, where the power supply and distribution characteristics include charge-discharge conversion duration, power imbalance interval duration, and standard control duration, and calculate the consumption control period of the energy storage system according to the power supply and distribution characteristics; The method for obtaining the charge-discharge conversion duration includes: Query all charge-discharge events in the energy storage system through a power database, identify the event attributes of all charge-discharge events one by one, and record the charge-discharge events with the event attribute of effective charge and discharge as target events to obtain A target events; Query the moment when the discharge information is first received in the A target events one by one through timestamps to obtain A demand moments; After the A demand moments, when no more power is discharged within the preset discharge duration, record the moment of the last power discharge as the end moment to obtain A end moments; Record the duration between the A demand moments and the A end moments as sub-durations, and record the maximum value among the A sub-durations as the charge-discharge conversion duration; The method for obtaining the power imbalance interval duration includes: Detect the real-time operating power of the power grid system through a power sensor and record it as the power supply power; Query the lower limit value of the operating power of the power grid system through a technical parameter table, and record the power supply power less than the lower limit value of the operating power as the imbalance power; Query the moments when the imbalance power appears in the power grid system one by one through timestamps to obtain B imbalance moments, and record the duration between the previous imbalance moment and the next imbalance moment as the sub-interval duration to obtain B - 1 sub-interval durations; Remove the maximum and minimum values of the sub-interval durations, and calculate the average value after accumulating the remaining B - 3 sub-interval durations to obtain the power imbalance interval duration; The expression of the power imbalance interval duration is: where SC sh is the power imbalance interval duration, and SC jgb is the duration of the b-th sub-interval; The standard control duration refers to the standard data used to represent the shortest duration for the consumption control of new energy power generation in the energy storage system; The expression of the consumption control period is: ZQ xn = SC bz + ρ1 * SC cf - ρ2 * SC sh ; where, ZQ xn is the accommodation control period, SC bz is the standard control duration, SC cf is the charge-discharge conversion duration, and ρ1, ρ2 are weight factors greater than 0; A data acquisition module, configured to divide the update control period into control time periods based on a time period division criterion, and obtain the comprehensive energy consumption data of the power grid system in the control time periods, where the comprehensive energy consumption data includes time period type, temperature change value, high-energy user increase value, high electricity price duration, and current balance rate; A prediction and determination module, configured to input the real-time comprehensive energy consumption data into a trained power consumption prediction model, predict the power consumption value of the next control time period, calculate the consumption demand value, and determine whether to perform a consumption control operation; A mode selection module, configured to obtain the total power generation of the new energy power generation system, calculate the consumption difference value according to the total power generation and the consumption demand value, and select the corresponding consumption control mode, where the consumption control mode includes an independent consumption mode and a combined consumption mode; A consumption control module, configured to control the new energy power generation system and the energy storage system to supply power to the power grid system according to different consumption control modes, so as to achieve the energy storage control purpose of new energy power generation consumption.

2. The energy storage control system for new energy power generation and consumption according to claim 1, wherein The time period division criterion is: the duration of each control time period is equal, and the termination moment of the previous control time period and the start moment of the next control time period are adjacent moments; The time period type includes peak time period, flat peak time period, and valley time period.

3. The energy storage control system for new energy power generation and consumption according to claim 2, wherein, The method for obtaining the high-energy user increase value includes: Query the power consumption of all electricity users in the power grid system one by one through the power database, and query the basic power consumption of the power grid system through the technical parameter table. After subtracting the user power consumption from the basic power consumption, the real-time power consumption is obtained; The expression of the real-time power consumption is: YD ss = YD yh - YD jc ; Where, YD ss is the real-time electricity consumption, YD yh is the electricity consumption of the user, YD jc is the basic electricity consumption; Compare the real-time power consumption with the high power consumption threshold, and record the electricity users with real-time power consumption greater than the high power consumption threshold as high-energy users; At the start and end times of D control periods, respectively count the number of high-energy users in the power grid system to obtain D start values and D end values; After subtracting the D end values from the D start values respectively, D high-energy user increase values are obtained; The expression of the high-energy user increase value is: GN zid = ZZ zd - QS zd ; where GN zid is the high-energy household increment in the d-th control period, d = 1, 2... D, ZZ zd is the termination value in the d-th control period, QS zd is the starting value in the d-th control period.

4. The energy storage control system for new energy power generation and consumption according to claim 3, wherein The method for obtaining the current balance rate includes: Real-time detect the branch currents of C load branches in the power grid system through current sensors, and after accumulating the C branch currents one by one, the supply current is obtained; Record the supply current between the current lower limit value and the current upper limit value as the balanced current, and mark the moments when the balanced current appears one by one within the control period, which are recorded as balanced moments; After accumulating all the balanced moments within D control periods in sequence, D balanced durations are obtained, and after comparing the D balanced durations with the duration of the control period respectively, D current balance rates are obtained; The expression of the current balance rate is: where, DL jhd is the current equalization rate of the d-th control period, SC jhd is the equalization duration of the d-th control period, and SC sd is the duration of the control period.

5. A energy storage control system for new energy power generation and consumption according to claim 4, characterized in that, The training method of the power consumption prediction model includes: Pre-collect multiple sets of comprehensive energy consumption data and the corresponding power consumption values, and number the time period types; Convert the comprehensive energy consumption data into multiple feature vectors using the sliding window method, convert the power consumption value into a label corresponding to the comprehensive energy consumption data according to the sliding step, one feature vector corresponds to one label, and a set of training data is formed. Multiple sets of training data form a training set, and the comprehensive energy consumption data is arranged in the order of collection time. Preset the prediction time step Q, the sliding step W, and the sliding window length Y; Use the feature vector as the input of the model, the power consumption value of the next control period after the prediction time step Q as the output, the subsequent power consumption values of each training set as the prediction target, and the sum of the minimized prediction errors as the training target to train the model, and generate a power consumption prediction model that predicts the power consumption value of the next control period based on the comprehensive energy consumption data of the previous control period.

6. The energy storage control system for new energy power generation and consumption according to claim 5, characterized in that The determination method for whether to perform the consumption control operation includes: After subtracting the predicted power consumption value of the next control period from the maximum power supply value, the consumption demand value is obtained; The expression of the consumption demand value is: XN xq = XH yc - GJ zd ; where XN xq is the absorption demand value, XH yc is the predicted power consumption value for the next control period, GJ zd is the maximum power supply value; When XN xq is greater than 0, it is determined to perform the absorption control operation; When XN xq is less than or equal to 0, it is determined that the consumption control operation is not executed.

7. The energy storage control system for new energy power generation accommodation according to claim 6, wherein The calculation method of the consumption difference value includes: Statistically calculate the sub-power generation of E new energy power stations through the power database, and after accumulating the E sub-power generations one by one, the total power generation is generated; The expression of the total power generation is: where, FD zl is the total power generation, and FD ze is the e-th sub-power generation; After subtracting the consumption demand value from the total power generation, the consumption difference value is obtained; The expression of the consumption difference value is: XN ce = FD Zl - XN xq ; where XN ce is the absorption difference value; The selection method of the independent consumption mode and the combined consumption mode includes: When XN ce is greater than or equal to 0, select the independent consumption mode; When XN ce is less than 0, select the combined accommodation mode.

8. An energy storage control system for new energy power generation and consumption according to claim 7, characterized in that The control method for supplying power to the power grid system includes: When the independent absorption mode is selected, the electric energy in the new energy power generation system is dispatched to the power grid system until the power dispatch stops when the absorption demand value is equal to 0, and all the remaining electric energy in the new energy power generation system is dispatched to the energy storage system for storage; When the combined dispatch mode is selected, first, all the electric energy in the new energy power generation system is dispatched to the power grid system, and then, part of the electric energy in the energy storage system is dispatched to the power grid system until the power dispatch stops when the absorption demand value is equal to 0.

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