Energy-saving feed consumption system and control method thereof

Abstract

The invention provides an energy-saving feed consumption system and a control method thereof, and relates to the technical field of power systems. The energy-saving feed consumption system comprises a battery pack which is electrically connected with a load side and a power supply side and is used for storing or releasing electric energy; the adjusting assembly is electrically connected with the battery pack, and the adjusting assembly is used for adjusting the charging and discharging state of the battery pack; the acquisition assembly is used for acquiring a real-time demand of a load side; the control assembly is electrically connected with the collecting assembly and the adjusting assembly, and the control assembly is used for controlling charging and discharging of the battery pack. According to the technical scheme of the invention, the energy-saving feed consumption system can store the released electric energy when the load side discharges and supply power when the load side uses electricity through the dynamic adaptation management of the electricity, improves the utilization efficiency of the electric energy, can supplement the electric energy from the power supply side, and achieves the cyclic utilization of the electric energy.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular, to an energy-saving power feeding and consumption system and a control method thereof. Background Art

[0002] In modern power systems, battery Packs or battery stacks play a key role as energy storage devices in energy storage and release. These energy storage devices can not only balance power supply and demand, but also improve the stability and reliability of the power grid. However, in practical applications, there are many challenges in the charging and discharging processes of batteries, resulting in unwarranted energy waste and other operation problems.

[0003] 1. Energy waste: Failure to effectively utilize the released electric energy: During the charging and discharging processes in the battery performance tests of battery Packs or energy storage boxes, the released electric energy is usually consumed by power devices such as dummy loads, resistors, or electric heaters. These devices convert electric energy into heat energy and dissipate it into the environment, failing to achieve the secondary utilization of electric energy, thus resulting in a large amount of energy waste. This phenomenon is particularly significant in large-scale battery tests and long-term operations. Energy waste not only increases operation costs but also has an adverse impact on environmental protection. 2. Power load fluctuations: Impact of peak loads: The charging and discharging processes of batteries can cause load fluctuations in the power grid. Especially during peak power demand periods, large-scale discharging of batteries may increase the pressure on the power grid, leading to grid instability. This situation may cause voltage fluctuations, frequency deviations, and even result in faults in the power grid system. Additionally, the differential electricity price strategy fails to be effectively utilized: Power companies usually implement differential electricity prices based on the peak and valley of power demand. However, in existing systems, the charging and discharging of batteries do not fully utilize this strategy. For example, insufficient charging is not carried out during periods of low electricity prices, or reasonable discharging is not carried out during periods of high electricity prices, resulting in additional cost expenditures; the failure to fully utilize the differential electricity price strategy also means that the economic benefits cannot be maximized. 3. System integration and control complexity: Difficulty in dynamic adaptation: Existing battery systems lack dynamic adaptation and intelligent control capabilities during the charging and discharging processes and cannot be flexibly adjusted according to real-time power demand and battery status.

[0004] The control systems in the prior art have a slow response speed and low accuracy and cannot achieve optimal energy management. Additionally, system coordination: The coordinated control between battery Packs or energy storage boxes and the power grid system is relatively complex, and multiple factors need to be considered, such as the status of the battery, load demand, electricity price fluctuations, etc. Existing systems are difficult to efficiently process this complex information and implement the best energy management strategy.

[0005] In view of the above technical problems, no effective solutions have been proposed yet. Summary of the Invention

[0006] The main objective of the present invention is to provide an energy-saving power feed and consumption system and its control method to solve the problem in the prior art that it is impossible to quickly, flexibly, and reasonably adjust and manage electricity consumption.

[0007] To achieve the above objective, according to one aspect of the present invention, there is provided an energy-saving power feed and consumption system, including: a battery pack, which is electrically connected to the load side and the power supply side, and is used for storing or releasing electric energy; an adjustment component, which is electrically connected to the battery pack and is used for adjusting the charge and discharge state of the battery pack; a collection component, which is used for collecting the real-time demand of the load side; a control component, which is electrically connected to the collection component and the adjustment component, and is used for controlling the charge and discharge of the battery pack.

[0008] Further, the energy-saving power feed and consumption system further includes: a fire protection component, which is electrically connected to the control component and is used for cutting off the circuit when the energy-saving power feed and consumption system has an overload or a short circuit.

[0009] Further, the energy-saving power feed and consumption system further includes: a cooling component, which is electrically connected to the control component and is arranged close to the battery pack, and is used for adjusting the temperature of the battery pack.

[0010] Further, the energy-saving power feed and consumption system further includes: a backup power supply, which is electrically connected to the control component, the collection component, and the adjustment component, and wherein the backup power supply is used for providing backup electric energy.

[0011] According to another aspect of the present invention, there is provided a control method for an energy-saving power feed and consumption system, the method including the following steps: collecting the real-time demand information of the load side and the working information of the energy-saving power feed and consumption system; based on the real-time demand information and the working information, determining the target working mode of the energy-saving power feed and consumption system, the target working mode at least including a power supply side charging mode and a load side working mode; based on the target working mode, generating a first control instruction set, the first control instruction set being used for controlling the energy-saving power feed and consumption system to enter the target working mode, wherein, in the power supply side charging mode, the energy-saving power feed and consumption system charges through the power supply side, and in the load side working mode, the energy-saving power feed and consumption system exchanges electric energy with the load side.

[0012] Optionally, determining the target working mode of the load side of the energy-saving power feed and consumption system based on the real-time demand information and the working information includes the following steps: based on the real-time demand information, determining the demand change of the load side; in the case where it is determined that the demand change does not meet the preset change condition, based on the working information, determining whether the energy-saving power feed and consumption system meets the preset charging condition; in the case where it is determined that the energy-saving power feed and consumption system does not meet the preset charging condition, determining the target working mode of the energy-saving power feed and consumption system as the load side working mode.

[0013] Optionally, after determining whether the energy-saving power feeding and consumption system meets the preset charging conditions, the method further includes the following steps: when it is determined that the energy-saving power feeding and consumption system meets the preset charging conditions, determining that the target working mode of the energy-saving power feeding and consumption system is the power supply side charging mode.

[0014] Optionally, the working information at least includes working time information and battery pack power information. When it is determined that the energy-saving power feeding and consumption system meets the preset charging conditions, determining that the target working mode of the energy-saving power feeding and consumption system is the power supply side charging mode includes: when it is determined that the working time information meets the charging time condition in the preset charging conditions and the battery pack power meets the charging power condition in the preset charging conditions, determining that the target working mode of the energy-saving power feeding and consumption system is the power supply side charging mode.

[0015] Optionally, after generating a control instruction set based on the target working mode, where the control instruction set is used to control the energy-saving power feeding and consumption system to enter the target working mode, the method further includes: determining a stop charging condition based on the working time information; when it is determined that the battery pack power meets the stop charging condition, generating a second control instruction set, where the second control instruction set is used to control the energy-saving power feeding and consumption system to exit the power supply side charging mode.

[0016] Optionally, after collecting the real-time demand information on the load side, the method further includes: obtaining the historical demand information on the load side; determining the predicted demand on the load side based on the real-time demand information and the historical demand information, where the predicted demand is used to represent the demand on the load side after a preset time period; determining the predicted working mode of the battery pack based on the predicted demand, where the predicted working mode is used to represent the working mode of the battery pack after a preset time period; generating a third control instruction set based on the predicted working mode, where the third control instruction set is used to control the battery pack to enter the predicted working mode after a preset time period.

[0017] By applying the technical solution of the present invention, the acquisition component can monitor and collect the change of the power demand on the load side in real time. Based on the change of the power demand on the load side, the control component can respond quickly and control the adjustment component to flexibly adjust the states among the load side, the power supply side, and the battery pack. When it is monitored that the power demand on the load side is large, the control component controls the adjustment component to adjust the battery pack to the power supply state for supplementing electric power to the load side; when it is monitored that the battery pack needs to be supplemented with electric energy, the control component controls the adjustment component to adjust the battery pack to the first charging state of charging from the power supply side; when it is monitored that the load side releases additional power, the control component controls the adjustment component to adjust the battery pack to the second charging state of capturing the electric energy released by the load side. Through the dynamic adaptive management of electricity consumption, the energy-saving power feeding and consumption system can store the released electric energy when the load side discharges and supply power when the load side uses electricity, improving the utilization efficiency of electric energy. At the same time, it can supplement electric energy from the power supply side, realizing the recycling of electric energy. Description of the Drawings

[0018] The accompanying drawings of the specification, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0019] Figure 1 shows a schematic structural diagram of a first embodiment of an energy-saving power feeding and consumption system according to the present invention;

[0020] Figure 2 shows a schematic structural diagram of a second embodiment of an energy-saving power feeding and consumption system according to the present invention;

[0021] Figure 3 shows a flowchart of an embodiment of an energy-saving power feeding and consumption control method according to the present invention;

[0022] Figure 4 shows a flow block diagram of an embodiment of an energy-saving power feeding and consumption control method according to the present invention;

[0023] Figure 5 shows a data graph of the load-side demand change according to the present invention.

[0024] Among them, the above-mentioned drawings include the following reference numerals:

[0025] 1, control component; 2, adjustment component; 3, battery pack; 4, fire protection component; 5, cooling component; 6, backup power supply; 7, switch component; 8, acquisition component. Detailed Embodiments

[0026] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] Now, exemplary embodiments according to the present application will be described in more detail with reference to the drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present application is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and thus their descriptions will be omitted.

[0030] Combined with Figures 1 to 2 As shown, according to a specific embodiment of the present application, an energy-saving power feeding and consumption system is provided.

[0031] Specifically, the energy-saving power feeding and consumption system includes a battery pack 3, an adjustment component 2, a collection component 8 and a control component 1. The battery pack 3 is electrically connected to the load side and the power supply side, and the battery pack 3 is used to store or release electric energy; the adjustment component 2 is electrically connected to the battery pack 3, and the adjustment component 2 is used to adjust the charge and discharge state of the battery pack 3; the collection component 8 is used to collect the real-time demand of the load side; the control component 1 is electrically connected to the collection component 8 and the adjustment component 2, and the control component 1 is used to control the charge and discharge of the battery pack 3.

[0032] Applying the technical solution of this embodiment, the acquisition component 8 can monitor and acquire the change of the power demand on the load side in real time. Based on the change of the power demand on the load side, the control component 1 can respond quickly and control the adjustment component 2 to flexibly adjust the state among the load side, the power supply side and the battery pack 3. When it is detected that the power demand of the load side is large, the control component 1 controls the adjustment component 2 to adjust the battery pack 3 to the power supply state for supplementing electric power to the load side; when it is monitored that the battery pack 3 needs to be supplemented with electric energy, the control component 1 controls the adjustment component 2 to adjust the battery pack 3 to the first charging state of charging from the power supply side; when it is detected that the load side releases additional power, the control component 1 controls the adjustment component 2 to adjust the battery pack 3 to the second charging state of capturing the electric energy released by the load side. Through the dynamic adaptation management of power consumption, the energy-saving power feeding and consumption system can store the released electric energy when discharging on the load side and supply power when the load side consumes power, improving the utilization efficiency of electric energy. At the same time, electric energy can be supplemented from the power supply side, realizing the recycling of electric energy.

[0033] In an embodiment of the present application, the adjustment component 2 can be a bidirectional inverter. The bidirectional inverter can be used for the bidirectional switching between the direct current of the battery pack 3 and the alternating current on the load side and the power supply side, realizing the electric energy exchange between the battery pack 3 and the load side and the power supply side. Optionally, the adjustment component 2 can also be a combination of a unidirectional inverter and a unidirectional rectifier. The unidirectional inverter and the unidirectional rectifier are respectively used to process the charging and discharging processes of the battery pack 3. The control component 1 further includes a display component, and the display component is used to provide comprehensive monitoring and control display.

[0034] Specifically, the energy-saving power feeding and consumption system further includes a fire protection component 4. The fire protection component 4 is electrically connected to the control component 1, and the fire protection component 4 is used to cut off the circuit when the energy-saving power feeding and consumption system has an overload or a short circuit. The fire protection component 4 can receive the instructions or system status information of the control component 1 and can respond quickly in an emergency. In addition to cutting off the circuit in an emergency, the fire protection component 4 can also release fire extinguishing agents to extinguish fires when an overload or short circuit fault causes a fire.

[0035] In an embodiment of the present application, the fire protection component 4 is further provided with an alarm device. Once an abnormality such as an overload or a short circuit is detected, the alarm can be immediately activated to remind the nearby staff. And the alarm device can also send the situations such as overload, short circuit, high temperature, etc. of the energy-saving power feeding and consumption system to the remote monitoring terminal or the mobile terminal through the remote communication module by wireless signals to remind the staff. The staff can also remotely control the energy-saving power feeding and consumption system to enter the safe mode and cut off the power supply and other operations according to the monitored results.

[0036] Furthermore, the energy-saving power feeding and consumption system further includes a cooling component 5, which is electrically connected to the control component 1. The cooling component 5 is disposed close to the battery pack 3 and is used to adjust the temperature of the battery pack 3. By connecting the cooling component 5 to the control component 1, the cooling component 5 can monitor the temperature of the battery pack 3 and feedback the monitoring result to the control component 1. The control component 1 can obtain the temperature of the battery pack 3 and then adjust and control the temperature of the battery pack 3 through the cooling component 5 to prevent the occurrence of situations such as thermal runaway of the battery pack 3, improve the working efficiency of the battery pack 3, extend the service life of the battery pack 3, and at the same time, electrically connect the cooling component 5 to the control component 1, so that the temperature adjustment can be fully automated, and the temperature of the battery pack 3 can be automatically adjusted according to the load demand, battery state and ambient temperature.

[0037] In an embodiment of the present application, the cooling component 5 can be a liquid cooling unit, which can accurately control the temperature of the battery pack 3 and is applicable to energy storage systems with high power density; the cooling component 5 can also be an air cooling system, which dissipates heat through air convection and is applicable to low power density scenarios.

[0038] Furthermore, the energy-saving power feeding and consumption system further includes a backup power supply 6, which is electrically connected to the control component 1, the acquisition component 8, and the adjustment component 2. Among them, the backup power supply 6 is used to provide backup electric energy. The backup power supply 6 is connected to each component. When the main power supply fails, is under maintenance, or reaches the peak power demand, it can provide the necessary electric energy for the energy-saving power feeding and consumption system to maintain the normal operation of the system and ensure that the energy-saving power feeding and consumption system will not stop running due to power interruption.

[0039] In an embodiment of the present application, as Figure 1 shown, the energy-saving power feeding and consumption system further has a switch component 7, which is used to control the overall connection of the energy-saving power feeding and consumption system between the load side and the power supply side, that is, the switch component 7 controls whether the entire energy-saving power feeding and consumption system is connected to the circuit for work, which can realize the intelligent scheduling of the energy-saving power feeding and consumption system and achieve multi-mode operating states according to different needs, optimize the energy utilization efficiency, and at the same time realize system isolation, which is convenient for the separate maintenance of the system.

[0040] As Figure 3 shown, according to another specific embodiment of the present application, a control method for an energy-saving power feeding and consumption system is further provided, and the method includes the following steps:

[0041] Step S21, collecting the real-time demand information of the load side and the working information of the energy-saving power feeding and consumption system;

[0042] Specifically, the acquisition component is used to collect the demand information on the load side in real time. The demand information on the load side includes information such as the current, voltage value, electric power demand, and electric energy demand on the load side; the acquisition component is used to collect the working information of the energy-saving power feeding and consumption system in real time. The working information includes information such as the state of the battery pack, the state of the adjustment component, and the time information.

[0043] In step S21, the collected real-time demand information on the load side is analyzed and processed to obtain the real-time total active power information on the load side. The real-time total active power information on the load side can represent the electricity demand on the load side, and the change in the total active power also represents the change in the electricity demand on the load side.

[0044] Step S22: Based on the real-time demand information and the working information, determine the target working mode of the energy-saving power feeding and consumption system. The target working mode includes at least a power supply side charging mode and a load side working mode.

[0045] Specifically, the working mode of the energy-saving power feeding and consumption system is controlled by analyzing the real-time demand information and the working information. When the collected real-time demand information shows that the demand on the load side is low, or the working information of the energy-saving power feeding and consumption system shows that the battery pack has insufficient power, the control component will judge whether the current is a favorable charging period, and use the above judgment as the control to make the energy-saving power feeding and consumption system enter the power supply side charging mode in the target working mode to charge the battery pack by the power supply side; when the collected real-time demand information shows that the demand on the load side is large, or the load side discharges, the control component will judge whether it is necessary to supply power from the battery pack to the load side or capture and store the electric energy from the load side, and use the above judgment as the control to make the energy-saving power feeding and consumption system enter the load side working mode in the target working mode.

[0046] It should be noted that in the load side working mode, the control component can control the battery pack to supply power to the load side, or the control component can control to capture the electric energy released by the load side and store it in the battery pack to avoid the waste of electric energy when the load side discharges.

[0047] Step S23: Based on the target working mode, generate a first control instruction set. The first control instruction set is used to control the energy-saving power feeding and consumption system to enter the target working mode. Among them, in the power supply side charging mode, the energy-saving power feeding and consumption system charges through the power supply side. In the load side working mode, the energy-saving power feeding and consumption system exchanges electric energy with the load side.

[0048] Specifically, based on the analysis of real-time demand information and working information, a first control instruction set is generated to determine the target working mode that the energy-saving power feeding and consumption system is to enter. After entering the power supply side charging mode, the regulating component is started to connect the power supply side to the battery pack, the electric power and voltage parameters are adjusted and set, the control component sends a charging control instruction, and the system enters the charging mode, and the battery pack obtains and stores electric energy from the power supply side; after entering the load side working mode, the regulating component is started to connect the battery pack to the load side, the electric power and voltage parameters are adjusted and set, the control component judges the state of the load side and then sends a discharge control instruction or a power capture control instruction, and the system enters the mode of exchanging electric energy with the load side.

[0049] Through the above steps, the real-time demand information of the load side and the working information of the energy-saving power feeding and consumption system are collected; based on the real-time demand information and the working information, the target working mode of the energy-saving power feeding and consumption system is determined, and the target working mode at least includes the power supply side charging mode and the load side working mode; based on the target working mode, a first control instruction set is generated, and the first control instruction set is used to control the energy-saving power feeding and consumption system to enter the target working mode. Among them, in the power supply side charging mode, the energy-saving power feeding and consumption system charges through the power supply side, and in the load side working mode, the energy-saving power feeding and consumption system exchanges electric energy with the load side. By dynamically monitoring the state of the load side and performing adaptive management, the real-time monitoring and adjustment of the battery charging and discharging process are realized, the efficient utilization of electric energy in the charging and discharging process is ensured, the energy consumption of traditional power devices such as false loads, resistors or electric heaters is reduced, and thus the energy waste is reduced.

[0050] Optionally, in step S22, based on the real-time demand information and the working information, determining that the target working mode of the energy-saving power feeding and consumption system is the load side working mode includes the following steps:

[0051] Step S221, based on the real-time demand information, determine the demand change of the load side;

[0052] Specifically, the real-time demand information includes information such as current and voltage. The real-time demand information is processed to obtain the total active power information of the load side, and the total active power information can be detected by an intelligent meter to determine the demand change of the load side.

[0053] In this embodiment, by introducing the PID control algorithm (Proportional Integral Derivative, closed-loop control algorithm), the energy balance between the load side and the power supply side is controlled by calculating the weighted sum of the three terms of error ratio (P), integral (I) and differential (D). The PID controller determines the demand change of the load side by real-time monitoring of the load side current, voltage and load demand, and then facilitates the subsequent adjustment of the working mode of the energy-saving power feeding and consumption system.

[0054] Step S222: When it is determined that the demand change does not meet the preset change conditions, based on the work information, determine whether the energy-saving power feeding and consumption system meets the preset charging conditions;

[0055] Specifically, the preset change conditions are the conditions preset on the load side. When the change in the load side demand (the monitored change values of the load side current, voltage, and total active power) does not meet the preset change conditions (that is, when it exceeds the allowable fluctuation range of the electric power), determine whether it meets the preset charging conditions. Among them, the preset change conditions are that the change in the power demand on the load side is within the allowable fluctuation range. If the preset change conditions are not met, the energy-saving power feeding and consumption system manages the electricity consumption through additional charging or discharging.

[0056] In step S222, when the load side demand change does not meet the preset change conditions, it indicates that power exchange needs to be carried out between the energy-saving power feeding and consumption system and the load side. At this time, judge whether the energy-saving power feeding and consumption system itself meets the preset charging conditions. Among them, the preset charging conditions are also the conditions preset in advance. The preset charging conditions are that the working time period meets the low electricity price period, and the battery pack power is lower than the preset value.

[0057] Step S223: When it is determined that the energy-saving power feeding and consumption system does not meet the preset charging conditions, determine that the target working mode of the energy-saving power feeding and consumption system is the load side working mode.

[0058] Specifically, when it is determined that the energy-saving power feeding and consumption system does not meet the preset charging conditions, it indicates that the battery pack power is sufficient or the working period is not the low electricity price period, and there is no need to charge the battery pack. Adjust the target working mode of the energy-saving power feeding and consumption system to the load side working mode, which can quickly respond to the real-time electricity demand changes on the load side.

[0059] Through steps S221 - S223, the energy-saving power feeding and consumption system can intelligently manage energy storage and release, ensure that while meeting the load side demand, reduce unnecessary energy consumption, optimize energy costs, and improve the overall energy efficiency and economy of the system.

[0060] Optionally, in step S222, after determining whether the energy-saving power feeding and consumption system meets the preset charging conditions, the method further includes the following steps:

[0061] Step S224: When it is determined that the energy-saving power feeding and consumption system meets the preset charging conditions, determine that the target working mode of the energy-saving power feeding and consumption system is the power supply side charging mode.

[0062] Specifically, when it is determined that the energy-saving power feeding and consumption system meets the preset charging conditions, it indicates that the battery pack has insufficient power (lower than the preset threshold) and the working period is the low electricity price period. The target working mode of the energy-saving power feeding and consumption system is adjusted to the power supply side charging mode, and charging is carried out during the low power demand period.

[0063] Through step S224, after it is determined that the energy-saving power feeding and consumption system meets the preset charging conditions, by using the valley-time charging strategy to charge the system during the period with a lower electricity price, the utilization efficiency and economy of energy can be maximized.

[0064] Optionally, in step S224, the working information includes at least the working time information and the battery pack power information. When it is determined that the energy-saving power feeding and consumption system meets the preset charging conditions, determining the target working mode of the energy-saving power feeding and consumption system as the power supply side charging mode includes:

[0065] Step S2241, when it is determined that the working time information meets the charging time condition in the preset charging conditions and the battery pack power meets the charging power condition in the preset charging conditions, determine the target working mode of the energy-saving power feeding and consumption system as the power supply side charging mode.

[0066] Specifically, the preset charging conditions include the preset charging time condition and the charging power condition. When the working time of the working time information and the battery pack power respectively meet the preset charging time condition and the preset charging power condition, it is determined that the working time information meets the preset charging conditions, and then the target working mode of the energy-saving power feeding and consumption system can be adjusted to the power supply side charging mode.

[0067] In this embodiment, multiple threshold points can be set for the preset charging time condition and the preset charging power condition. For example, the low power demand period is divided into multiple time periods, that is, divided into the first charging time condition, the second charging time condition... The battery pack power can also be divided into multiple power threshold points, that is, divided into the first power, the second power... When determining the working time information, for example, when the working time of the energy-saving power feeding and consumption system meets the first charging time condition and the battery pack power meets the first power condition, charging is carried out on the power supply side; when the working time of the energy-saving power feeding and consumption system meets the second charging time condition and the corresponding battery pack power meets the second power condition, charging can still be carried out on the power supply side. In this way, by dividing different time periods to charge the battery pack in segments, the power control of the energy-saving power feeding and consumption system can be accurately controlled, and the energy-saving power feeding and consumption system can be charged by selecting the electricity price in different time periods, which helps to improve the overall energy management efficiency and economic efficiency.

[0068] Through step S2241, the energy-saving power feeding and consumption system can effectively manage the charging process, ensure charging at the optimal time and in the optimal state, thereby improving energy utilization efficiency, reducing costs, and extending the service life of the battery pack.

[0069] Optionally, in step S224, based on the target working mode, a control instruction set is generated. After the control instruction set is used to control the energy-saving power feeding and consumption system to enter the target working mode, the method further includes:

[0070] Step S225, determining the charging stop condition based on the working time information;

[0071] Specifically, when the change in the load-side demand does not meet the preset change condition, at this time, it is necessary to judge whether the power supply-side charging mode of the energy-saving power feeding and consumption system can enter the target working mode based on its own condition information. Based on the working time information, when it is judged that the working time does not meet the preset charging time condition, or according to the actually collected working time information, when the working time jumps from meeting the preset charging time condition to not meeting the preset charging time condition, the charging of the battery pack is stopped, that is, the end threshold point of the preset charging time is determined.

[0072] In step S225, based on the battery power information in the working time information, when the battery pack is charged to reach the first preset power threshold point or the second preset power threshold point, the charging of the battery pack is stopped, that is, the end threshold point of the preset charging power is determined.

[0073] Step S226, when it is determined that the battery pack power meets the charging stop condition, generating a second control instruction set, where the second control instruction set is used to control the energy-saving power feeding and consumption system to exit the power supply-side charging mode.

[0074] Specifically, the working time information of the energy-saving power feeding and consumption system is obtained in real time, and the time point and the power of the battery pack are monitored in real time. When the time point does not meet the preset time condition or the battery pack power does not meet the preset charging power condition, a second control instruction set is generated to exit the power supply-side charging mode, and the control component then prepares for the subsequent working mode or makes a status adjustment.

[0075] Through steps S225 - S226, the energy-saving power feeding and consumption system can dynamically adjust its working mode according to the battery pack power status and time conditions, ensuring that the battery is neither overcharged nor charged at an inappropriate time, thereby optimizing energy utilization efficiency, reducing operating costs, and ensuring the long-term health and safety of the battery pack.

[0076] Optionally, in step S21, after collecting the real-time demand information of the load side, the method further includes:

[0077] Step S211, obtaining the historical demand information of the load side;

[0078] Specifically, the real-time demand information on the load side is collected, and at the same time, the information is stored, analyzed, and the real-time demand information is recorded. Based on the periodic time repetition, the demand information at the same time point is recorded to form historical demand information, which includes information such as time series data, peak and valley value information, average demand information, and change trend.

[0079] Step S212, based on the real-time demand information and the historical demand information, determine the predicted demand on the load side, where the predicted demand is used to represent the demand on the load side after a preset time period;

[0080] Specifically, the predicted demand includes predictions of future electric power, electric energy demand, demand fluctuation prediction, demand trend prediction, seasonal demand prediction, demand prediction for weekdays and rest days, environmental impact prediction, etc.; the preset time period is a pre-set time period. Through the historical demand information, a time point is determined within a period of time before the periodic demand power changes on the load side. After a preset time period is calculated from this time point, the power demand changes. According to different cycle rules in the historical demand information, different or the same preset time periods can be set for the power demand changes on the load side to improve the response speed.

[0081] Step S213, based on the predicted demand, determine the predicted working mode of the battery pack, where the predicted working mode is used to represent the working mode of the battery pack after a preset time period;

[0082] Specifically, the preset working mode covers the possible states of the battery pack after a preset time period. According to the different working modes corresponding to different historical cycles, it can be determined that the predicted working mode includes various working modes such as charging mode, discharging mode, standby mode, dynamic adjustment mode, maintenance mode, and optimization mode.

[0083] Step S214, based on the predicted working mode, generate a third control instruction set, where the third control instruction set is used to control the battery pack to enter the predicted working mode after a preset time period.

[0084] Specifically, when the predicted working mode is determined, a third control instruction set is generated, and the third control instruction set is executed after a preset time period. The third control instruction set adjusts the working parameters and working states of the battery pack.

[0085] Through steps S211 - S214, by combining the historical demand information and the real-time demand information to analyze and determine the predicted demand on the load side, and generating a third control instruction set to pre-adjust the working mode of the energy-saving power feeding and consumption system, the intelligent preset of the future state can be realized, ensuring that while the battery pack meets the demand on the load side, the energy use efficiency is optimized, the cost is reduced, and the stability and reliability of the entire system are improved.

[0086] The present application also provides a preferred embodiment of an energy-saving power feeding and consumption system. The energy-saving power feeding and consumption system dynamically matches the power demand to achieve efficient energy exchange between the load side and the battery pack, reduce energy waste. The system adopts a PID control algorithm and a valley charging strategy to maintain energy balance and improve the overall efficiency of the system.

[0087] Specifically, as Figure 1 、 Figure 2 shown, the energy-saving power feeding and consumption system consists of three parts. The load side is a battery performance test laboratory, and its overall total active power output will change according to experimental requirements for battery performance testing. Along with the irregular change of the total active power, the power supply side is the grid end; the acquisition component 8 can obtain the change of the power demand on the load side in real time; the power feeding and consumption system cyclically reads the real-time data of the total active power of the acquisition component 8, and issues the corresponding compensation power to the adjustment component 2 according to this data for power feeding and consumption. In addition, the control component 1 monitors the operation status of the fire protection component 4, maintains the normal operation of the system according to the fire protection status, and controls the operation of the cooling component 5 according to the temperature of the battery cells in the battery pack 3.

[0088] The load side is used to test the performance of the battery pack 3, and its overall total active power output will change according to the load side demand, and these changes are irregular. The power supply side, as the main provider and receiver of electric energy, provides electric energy for the system or receives the excess electric energy of the system. The control component 1 monitors and controls the operation of the entire battery pack 3 and communicates with the battery pack 3 through the CAN interface. The acquisition component 8 uses an electric meter to obtain the change of the power demand on the load side in real time. The electric meter monitors and records parameters such as current, voltage, and total active power, and transmits the data to the control component 1. The fire protection component 4 is connected to the control component 1, transmits data through the RS485 interface, and monitors and responds to possible fires in the system. The adjustment component 2 uses a bidirectional inverter to realize the bidirectional conversion between direct current and alternating current on the battery pack 3, the load side, and the power supply side, adjusts the charging and discharging process of the battery pack 3, and performs power compensation according to the instructions of the control component 1 to maintain energy balance. The cooling component 5 uses a liquid cooling unit to control the temperature of the battery pack 3 to prevent the battery pack 3 from overheating.

[0089] The energy-saving power feeding and consumption system also includes a switch component 7, a high-voltage box, a UPS (Uninterruptible Power Supply), and a battery box. The switch component 7 is used to connect and disconnect the power supply of the system and monitor and manage the input and output of electric energy; the high-voltage box is located below the electric meter switch component 7 and is used to accommodate and protect high-voltage circuits to ensure the safe operation of the system; the UPS provides a backup power supply 6 to ensure that the system can continue to operate in case of a power failure; the battery box is used to store the battery pack 3 for storing electric energy, and each battery box can work independently or cooperate with each other.

[0090] The present application also provides a preferred embodiment of a control method for an energy-saving power feeding and consumption system, as Figure 4 shown Figure 4 is a flowchart of the control method for the energy-saving power feeding and consumption system, including the following steps:

[0091] Step 1: Connect the electric meter between the load side, the power supply side and the energy-saving power feeding and consumption system, monitor the load-side power in real time, dynamically match the power of the electric meter, and the control component reads the real-time total active power in the electric meter;

[0092] As Figure 5 shown Figure 5 shows the change of the real-time total active power of the electric meter in different time periods. Figure 5 In , the vertical coordinate represents the power value, the unit is kilowatt (kW), and the horizontal coordinate represents time or sampling points. Figure 5 In , the time series data points from 1 to 6900 are shown, and the fluctuation of the power value reflects the operation of the energy-saving power feeding and consumption system during the dynamic power matching process.

[0093] Among them, Figure 5 in multiple intervals, the power is relatively stable. For example, in the time periods of about 400 to 1300, 1550 to 2550, and 4850 to 6000, the power value fluctuates within a relatively small range, indicating that the load demand of the system is relatively stable during these periods. At several points in the time series, such as 300 and from 1300 to 1500, obvious power peaks appear because the valley-time charging strategy leads to an increase in power demand, and at this time, the demand power is not dynamically matched; the mutations from 2800 to 4800 are caused by sudden changes on the load side, such as the charging and discharging demands on the load side resulting in an instantaneous increase in power demand. At this time, the power feeding and consumption system has a good consumption effect, and the corresponding power adjustment is timely. In the time periods of 2000 to 3000 and 4000 to 5000, the power fluctuates frequently and greatly, showing the response of the system to high-frequency load changes.

[0094] Step 2: Determine whether the power of the electric meter is within the allowable fluctuation range. If it is within the allowable fluctuation range, jump to Step 1; if it is not within the allowable fluctuation range, jump to Step 3;

[0095] Step 3: Determine whether to execute the valley-time charging strategy. According to the working information of the energy-saving power feeding and consumption system, determine whether the working information meets the preset charging conditions. When the preset charging conditions are met, adjust the power supply side to charge the battery pack;

[0096] Step 4: The PID control algorithm calculates the working power value of the energy-saving power feeding and consumption system according to the power of the electric meter;

[0097] Among them, the PID algorithm is adopted to dynamically adjust the charging and discharging power of the system according to the real-time monitored data. This algorithm can quickly calculate the optimal charging and discharging power to maximize the matching of the power variation on the demand side. PID represents three control actions: Proportional, Integral, and Derivative. The combination of these three control actions can enable the control component to have good regulation performance, including fast response, small overshoot, and good steady-state accuracy.

[0098] The mathematical expression of the PID controller is as follows:

[0099]

[0100] Where: μ(t) is the controller output, e(t) = r(t) - y(t), r(t) is the set value (target value), y(t) is the process variable (actual value), K p is the proportional gain, K i is the integral gain, K d is the derivative gain. Proportional control is used for immediate adjustment, integral control is used to eliminate the accumulated error, and derivative control is used to predict and adjust the future error.

[0101] Step Five: The control component issues a control instruction set to the adjustment component to adjust the stable operation of the energy-saving power feeding and consumption system.

[0102] After executing the above steps, the power matching of the energy-saving power feeding and consumption system to the load side is completed. Through the historical data monitored on the load side and combined with the current trend analysis, the system can also predict the future changes on the load side and adjust the working state in advance to ensure that when the power on the load side changes, the system can respond quickly.

[0103] Based on the charging strategy during low valley periods, by charging during periods of low electricity prices, the system can significantly reduce the energy cost. The utilization of electricity price fluctuations greatly reduces the charging cost of the system and significantly improves the economic benefits. Charging during low electricity price periods ensures that the system has sufficient energy for discharging during peak periods, which can effectively respond to the peak load of the power grid and achieve peak shaving and valley filling. The specific steps are as follows:

[0104] Step One: The system pre-sets the low valley electricity price period and the charging threshold, and judges the working time of the system and the battery pack power.

[0105] Step Two: When the SOC (State of Charge) of the system is first lower than 40% and the system is in the low electricity price period (such as from 1 am to 5 am), charge it to 40%; when the SOC of the system is first lower than 60% and the system is in the low electricity price period (from 5 am to 6 am), charge it to 60%.

[0106] From the description of the above embodiments, it can be seen that the present application has the following beneficial effects:

[0107] 1) By means of the dynamic adaptation management method, the efficient utilization of electric energy during the charging and discharging processes is ensured, the energy consumption of traditional power devices such as dummy loads, resistors or electric heaters is reduced, thereby reducing energy waste. This not only improves the utilization efficiency of electric energy but also reduces the dependence on the power grid, realizing the recycling of energy.

[0108] 2) The introduction of the PID control algorithm ensures the precise control of the system during the charging and discharging processes, reduces the amount of electricity obtained from the power grid, and hardly feeds electric energy back to the power grid, thereby realizing the efficient utilization of energy and the stability of the power grid. The PID control algorithm can also adjust the charging and discharging power of the system in real time to ensure that the system maintains energy balance under different load conditions. At the same time, through the mathematical model and control algorithm, the PID controller can minimize the error during the charging and discharging processes and achieve high-precision energy management.

[0109] 3) Charging during off-peak hours and discharging during peak hours realizes the peak shaving and valley filling of the power grid load, balances the power supply and demand, reduces the load pressure and operating costs of the power grid. At the same time, the valley-time electricity replenishment strategy makes full use of the differential electricity price policy implemented by power companies. By charging during low-price hours and discharging during high-price hours, the maximization of economic benefits is achieved. Moreover, the mathematical model shows that this strategy can significantly reduce the electricity cost and improve the stability of the power grid by adjusting the load.

[0110] For the sake of description, spatial relative terms, such as "above", "on top of", "on the upper surface", "upper", etc., can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above" or "on top of" other devices or structures will be positioned as "below" or "beneath" other devices or structures after inversion. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0111] In addition to the above, it should also be noted that the "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in connection with that embodiment being included in at least one embodiment described in the general description of the present application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in connection with any one embodiment, it is intended that implementing such feature, structure or characteristic in connection with other embodiments also falls within the scope of the present invention.

[0112] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0113] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An energy-saving power feeding and consumption system, characterized in that, Comprising: A battery pack (3), which is electrically connected to the load side and the power supply side, and is used for storing or releasing electric energy; An adjustment component (2), which is electrically connected to the battery pack (3) and is used for adjusting the charge and discharge state of the battery pack (3); A collection component (8), which is used for collecting the real-time demand of the load side; A control component (1), which is electrically connected to the collection component (8) and the adjustment component (2), and is used for controlling the charge and discharge of the battery pack (3).

2. The energy-saving power feeding and consumption system according to claim 1, characterized in that The energy-saving power feeding and consumption system further comprises: A fire protection component (4), which is electrically connected to the control component (1) and is used for cutting off the circuit when the energy-saving power feeding and consumption system has an overload or a short circuit.

3. The energy-saving power feeding and consumption system according to claim 1, characterized in that The energy-saving power feeding and consumption system further comprises: A cooling component (5), which is electrically connected to the control component (1), is arranged close to the battery pack (3), and is used for adjusting the temperature of the battery pack (3).

4. The energy-saving power feeding and consumption system according to claim 1, wherein The energy-saving power feeding and consumption system further comprises: A backup power supply (6), which is electrically connected to the control component (1), the collection component (8), and the adjustment component (2), and is used for providing backup electric energy.

5. A control method for an energy-saving power feeding and consumption system, characterized in that, The method comprises the following steps: Collecting the real-time demand information of the load side and the working information of the energy-saving power feeding and consumption system; Based on the real-time demand information and the working information, determining the target working mode of the energy-saving power feeding and consumption system, and the target working mode at least includes a power supply side charging mode and a load side working mode; Based on the target working mode, generating a first control instruction set, which is used for controlling the energy-saving power feeding and consumption system to enter the target working mode. In the power supply side charging mode, the energy-saving power feeding and consumption system charges through the power supply side, and in the load side working mode, the energy-saving power feeding and consumption system exchanges electric energy with the load side.

6. The method according to claim 5, characterized in that, Based on the real-time demand information and the working information, determining that the target working mode of the energy-saving power feeding and consumption system is the load side working mode, including the following steps: Based on the real-time demand information, determining the demand change of the load side; When it is determined that the demand change does not meet the preset change condition, judging whether the energy-saving power feeding and consumption system meets the preset charging condition based on the working information; When it is determined that the energy-saving power feeding and consumption system does not meet the preset charging condition, determining that the target working mode of the energy-saving power feeding and consumption system is the load side working mode.

7. The method according to claim 6, wherein After judging whether the energy-saving power feeding and consumption system meets the preset charging condition, the method further comprises the following steps: When it is determined that the energy-saving power feeding and consumption system meets the preset charging condition, determining that the target working mode of the energy-saving power feeding and consumption system is the power supply side charging mode.

8. The method according to claim 7, characterized in that, The working information at least includes working time information and battery pack power information. When it is determined that the energy-saving power feeding and consumption system meets the preset charging conditions, determining the target working mode of the energy-saving power feeding and consumption system as the power supply side charging mode includes: When it is determined that the working time information meets the charging time condition in the preset charging conditions and the battery pack power meets the charging power condition in the preset charging conditions, determining the target working mode of the energy-saving power feeding and consumption system as the power supply side charging mode.

9. The method according to claim 8, wherein Based on the target working mode, generating a control instruction set, and after the control instruction set is used to control the energy-saving power feeding and consumption system to enter the target working mode, the method further includes: Based on the working time information, determining a charging stop condition; When it is determined that the battery pack power meets the charging stop condition, generating a second control instruction set, and the second control instruction set is used to control the energy-saving power feeding and consumption system to exit the power supply side charging mode.

10. The method according to claim 5, characterized in that After collecting the real-time demand information on the load side, the method further includes: Obtaining the historical demand information on the load side; Based on the real-time demand information and the historical demand information, determining the predicted demand on the load side, and the predicted demand is used to represent the demand on the load side after a preset time period; Based on the predicted demand, determining the predicted working mode of the battery pack, and the predicted working mode is used to represent the working mode of the battery pack after a preset time period; Based on the predicted working mode, generating a third control instruction set, and the third control instruction set is used to control the battery pack to enter the predicted working mode after the preset time period.

Images