Supply-demand coordinated polymorphic energy efficient conversion and control method

Abstract

The invention relates to the technical field of multi-state energy conversion, and discloses a supply-demand collaborative multi-state energy efficient conversion and control method, which comprises the following steps: S1, energy and demand information acquisition: acquiring multi-state energy data in real time, and acquiring and monitoring the real-time power demand and working state of highway traffic energy consumption equipment; s2, analyzing energy dynamic characteristics and energy consumption demands; s3, multi-type alternating current / direct current efficient conversion; s4, multi-converter transient state and steady state power balance control is carried out; s5, DC bus stability control; and S6, generation and execution of a supply and demand cooperation strategy. According to the invention, the method of supply and demand coordination strategy generation and fusion of multi-source and multi-machine coordination control is adopted, so that the method can flexibly meet the complex and changeable energy demand of the road, effectively integrate various energy sources, carry out targeted control and direct current bus stable control, realize efficient, stable and intelligent energy supply, and improve the energy utilization efficiency and economy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of multi-state energy conversion, and particularly relates to a multi-state energy efficient conversion and control method with supply and demand coordination. BACKGROUND

[0002] At present, the global energy transformation is actively promoted, and efforts are made to achieve the carbon emission reduction target. As a key industry of energy consumption and carbon emission, the optimization and reform of the energy structure in the transportation field are urgent. At the same time, with the continuous rise of the number of vehicles and the increasing demand for travel, the traffic flow on the road is increasing, which puts forward higher requirements for the stable supply and efficient use of energy. Under this dual background, the road energy scene is gradually becoming the focus of research and development, and a series of new technologies and concepts need to be explored and applied.

[0003] In the road energy scene, the existing technology focuses on the conversion and utilization of a single energy, such as a solar or wind power independent power supply system, which lacks coordinated control of multiple energy forms, and the efficiency and stability are insufficient when facing complex energy demand on the road. SUMMARY

[0004] In order to make up for the above shortcomings, the present application provides a multi-state energy efficient conversion and control method with supply and demand coordination, which aims to improve the problem of low energy utilization efficiency caused by the lack of coordinated control of multiple energy forms and the insufficient efficiency and stability when facing complex energy demand on the road.

[0005] In the first aspect, the present application provides the following technical scheme, a multi-state energy efficient conversion and control method with supply and demand coordination, comprising the following steps: S1, energy and demand information collection: collecting multi-state energy data in real time, and collecting real-time power demand and working state of the monitoring road traffic energy equipment; S2, energy dynamic characteristics and energy demand analysis: according to the collected energy data, data analysis is carried out, and the demand situation is sorted out combined with the energy equipment data; S3, multi-type AC / DC efficient conversion: according to the energy type and the demand of the energy equipment, multi-type AC / DC efficient conversion is designed and implemented; S4, multi-converter transient and steady-state power balance control: in the transient process, when the energy input or load demand changes suddenly, the converter is adjusted, and in the steady state, the power of the converter is adjusted according to the power generation cost, the remaining power of each energy and the load demand; S5, DC bus stable control: real-time monitoring of the voltage and current of the DC bus, when the DC bus voltage fluctuates, the control mechanism is started, the voltage compensation technology is introduced, and the dynamic compensation of the DC bus voltage is carried out; S6, supply and demand coordination strategy generation and execution: according to the dynamic characteristics of energy collection in S1, the energy demand analysis results in S2 and the DC bus stable control in S3, the supply and demand coordination strategy is formulated, and the switch and converter parameters of each energy access point are controlled through the formulated strategy.

[0006] In S1, the multi-state energy data includes the output power, voltage and current data of solar energy, wind energy and commercial power, and the power, charging and discharging state of energy storage device. The highway traffic energy consumption equipment includes road lighting equipment and traffic monitoring equipment, and adopts wireless communication to transmit the real-time power demand and working state data of the energy consumption equipment to the control center. The communication protocol adopts low-power LoRa protocol, and the transmission distance is not less than 10 kilometers.

[0007] In S2, the data analysis includes analyzing the intermittency and volatility of solar energy and wind energy, the stability of commercial power and the charging and discharging characteristics of energy storage device, and using time series analysis algorithm to process the collected energy data to predict the output power change trend of solar energy and wind energy in the next 1-3 hours. The demand situation includes the change rule and peak demand situation of highway traffic energy demand in different periods and different sections, and the energy demand data in different periods and sections is classified by clustering analysis method, and at least 5 typical energy consumption modes are divided.

[0008] In S3, the output DC of solar energy is converted by DC-DC converter with synchronous rectification technology to meet the voltage requirement of DC load or energy storage device; for AC power of commercial power, it is converted to stable DC by rectifier circuit; Wind power generation, according to the output characteristics of wind turbine, design the circuit containing rectification and DC-DC conversion, realize the efficient AC / DC conversion of wind power.

[0009] In S4, the parameters of the converter are adjusted according to the switching frequency and duty cycle of the converter, and according to the change amount and rate of energy input and load demand; In steady state, the energy with low cost and sufficient residual power is preferentially used.

[0010] In S5, when the voltage is too high, the converter of the energy storage device charging circuit increases the charging power, or reduces the output power of part of the power generation equipment, and when the voltage is too low, the energy storage device discharges, and at the same time adjusts the output power of the power generation equipment, so as to maintain the DC bus voltage in the stable range.

[0011] In S6, when there is sufficient sunlight during the day and the load demand is small, solar power is used first and the excess power is stored in the energy storage device. At night or in bad weather, the energy storage device and the mains electricity are used to provide power in a coordinated manner. A priority mechanism is set up, and the mains electricity is used as a backup energy source and is only put into use when other energy sources cannot meet demand.

[0012] In a second aspect, the present invention provides the following technical solution: a control system for efficient conversion of multi-state energy with coordinated supply and demand, the system comprising: Energy and demand information collection module, used to collect multi-state energy data and highway energy equipment data in real time, and transmit data wirelessly via the low-power LoRa protocol; The energy dynamic characteristics and energy demand analysis module is connected to the energy and demand information collection module to receive and collect data, analyze energy characteristics, predict energy power changes, sort out energy demand patterns, and classify typical energy consumption patterns to provide a basis for subsequent links; The multi-type AC / DC high-efficiency conversion module is connected to the energy and demand information acquisition module and the energy dynamic characteristics and energy demand analysis module. It is used to convert different energy sources based on the analysis results to meet the load and energy storage voltage requirements and realize efficient AC / DC conversion of wind energy; The multi-converter transient and steady-state power balancing control module is connected to the multi-type AC / DC high-efficiency conversion module. It is used to quickly adjust the power in transient state based on the converted energy and distribute the power in steady state based on cost, power consumption and demand to ensure stable supply. The DC bus stabilization control module is connected to the multi-converter transient and steady-state power balancing control module to monitor the DC bus voltage and current, control the energy storage and power generation equipment when there are fluctuations, and introduce compensation technology to ensure voltage stability; The supply and demand coordination strategy generation and execution module is connected to the energy and demand information collection module, the energy dynamic characteristics and energy demand analysis module, the multi-type AC / DC high-efficiency conversion module and the multi-converter transient and steady-state power balancing control module. It is used to integrate information from all parties to formulate coordination strategies, control energy access and converter parameters, and achieve reasonable energy distribution and efficient utilization.

[0013] In the third aspect, the invention provides the following technical solution: a computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor; when the processor executes the computer program, the processor implements the above-mentioned method for efficient conversion and control of multi-state energy with coordinated supply and demand.

[0014] In a fourth aspect, the present application provides a readable storage medium, wherein the readable storage medium stores a computer program, and the computer program is executed by a processor to implement the above-mentioned multi-state energy efficient conversion and control method based on supply and demand coordination.

[0015] The present application has the following advantages: 1. In the present application, the method of generating and fusing multi-source and multi-machine coordinated control by adopting the supply and demand coordination strategy can flexibly cope with the complex and variable energy demand of highways, effectively integrate various energies, and perform targeted AC / DC conversion control, multi-converter transient / steady-state power balance control and DC bus stable control, thereby realizing efficient, stable and intelligent energy supply and improving energy utilization efficiency and economy.

[0016] 2. In the present application, the DC-DC converter adopting the synchronous rectification technology is used to step up or step down the solar output DC power, the rectifier circuit is used to convert the AC power into stable DC power, and the circuit containing rectification and DC-DC conversion is designed according to the output characteristics of the fan for wind power generation, so that various energies can be connected to the system and reasonably utilized, thereby improving the compatibility of the energy system and the flexibility and efficiency of energy utilization.

[0017] 3. In the present application, the information provided by the energy and demand information acquisition module, the energy dynamic characteristic and energy demand analysis module, the multi-type AC / DC efficient conversion module and the multi-converter transient and steady-state power balance control module is used to formulate and execute the strategy by the supply and demand coordination strategy generation and execution module, so as to realize accurate matching of energy supply and demand, improve energy utilization efficiency, reduce energy cost, and improve the overall performance and sustainability of the highway transportation energy system.

[0018] 4. In the present application, the energy output by the multi-converter transient and steady-state power balance control module is used to monitor and stabilize the DC bus voltage in real time by the DC bus stable control module, so as to provide reliable power supply for energy-consuming equipment and improve the stability and safety of the energy system.

[0019] 5. In the present application, the multi-state energy data of the sensor is used to collect and monitor the real-time power demand and working state of the highway transportation energy-consuming equipment, and the wireless communication mode based on the low-power LoRa protocol is used, so as to accurately grasp the energy supply condition and the actual demand of the energy-consuming equipment, thereby realizing effective connection of energy supply and energy-consuming equipment demand, improving the system operation efficiency and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A method flowchart of the multi-state energy efficient conversion and control method based on supply and demand coordination provided by the present application; Figure 2A system architecture diagram of a supply-demand coordinated multi-state energy efficient conversion control system is provided for the present application. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0022] Embodiment one Reference Figure 1 In the first embodiment of the present application, the present application provides a supply-demand coordinated multi-state energy efficient conversion and control method, comprising the following steps: S1, energy and demand information collection: real-time collection of multi-state energy data, and collection of real-time power demand and working state of monitoring highway traffic energy-using equipment; S2, energy dynamic characteristics and energy-using demand analysis: according to the collected energy data, data analysis is performed, and the demand situation is sorted out in combination with the energy-using equipment data; S3, multi-type AC / DC efficient conversion: according to the energy type and energy-using equipment demand, multi-type AC / DC efficient conversion is designed and implemented; S4, multi-converter transient and steady-state power balance control: in the transient process, when the energy input or load demand changes suddenly, adjustment is made through the converter, and in the steady state, the power of the converter is adjusted according to the generation cost, residual power of each energy and load demand; S5, DC bus stable control: real-time monitoring of the voltage and current of the DC bus, when the DC bus voltage fluctuates, the control mechanism is started, the voltage compensation technology is introduced, and the dynamic compensation of the DC bus voltage is performed; S6, supply-demand coordination strategy generation and execution: according to the dynamic characteristics of energy collection in S1, the energy-using demand analysis results in S2 and the DC bus stable control in S3, a supply-demand coordination strategy is formulated, and through the formulated strategy, the switches and converter parameters of each energy access point are controlled.

[0023] Specifically, in the S1 step, by real-time collection of multi-state energy data and real-time power demand and working state data of highway traffic energy-using equipment, the energy supply condition can be accurately mastered, the real-time availability of various types of energy can be understood, and the actual demand of energy-using equipment can be determined, so as to ensure efficient coordinated use of multiple energies under different energy conditions and energy-using demands, to ensure stable and reliable operation of the entire energy supply system, and to improve the stability and safety of highway traffic energy use; In S2, by analyzing the collected energy data, the intermittency and volatility of solar and wind energy, the stability of the mains, and the charging and discharging characteristics of the energy storage device are analyzed. Combined with the demand analysis of different time periods and road sections, the variation law of energy supply and the actual demand of energy-using equipment are grasped to realize the optimal allocation of energy, improve energy utilization efficiency, ensure the dynamic balance of energy supply and demand, and enhance the ability to cope with complex highway traffic energy scenarios. In S3, various types of energy can be converted into electric energy that meets the requirements of energy-using equipment, improving energy adaptability, realizing the use of different energy, reducing energy transmission and conversion losses, and ensuring stable operation of energy-using equipment. In S4, the system can respond to sudden changes in energy input or load demand during transient processes by adjusting power through the converter, ensuring system stability in emergency situations. In steady state, the system adjusts based on the power generation cost, remaining power, and load demand of each energy source to optimize energy distribution, prioritize low-cost and sufficient energy, improve energy utilization efficiency, and achieve precise matching of energy supply and load demand in different working conditions, improving the overall efficiency and reliability of the energy system. In S5, by monitoring the voltage and current of the DC bus in real time, the control mechanism is started when the voltage fluctuates, and the voltage compensation technology is introduced for dynamic compensation, which can effectively maintain the stability of the DC bus voltage, provide stable power supply for subsequent energy-using equipment, avoid equipment failure or abnormal operation caused by unstable voltage, and ensure the smooth operation of the entire energy system, improving the quality and safety of energy transmission and use. In S6, the dynamic characteristics of S1 energy collection, the results of S2 energy demand analysis, and the relevant information of S3 DC bus stability control are integrated to develop a supply and demand coordination strategy and control the switches and converter parameters of each energy access point, achieving precise matching of energy supply and demand, optimizing energy distribution in different scenarios using various energy resources, improving energy utilization efficiency, ensuring stable operation of the system, reducing energy costs, and improving the overall performance and sustainability of the highway transportation energy system.

[0024] In S1, the multi-state energy data includes the output power, voltage, and current data of solar, wind, and mains energy, as well as the power, charging and discharging status of energy storage devices. The output power, voltage, and current data of solar, wind, and mains energy are collected using sensors. Highway traffic energy-using equipment includes road lighting equipment and traffic monitoring equipment, and wireless communication is used to transmit real-time power demand and working state data of energy-using equipment to the control center. The communication protocol uses the low-power LoRa protocol, with a transmission distance of not less than 10 kilometers.

[0025] Specifically, by using sensors to collect solar energy, wind energy, output power, voltage, current data of the power supply, the real-time state of various types of energy is obtained, which provides a basis for energy utilization and deployment, and the power, charging and discharging state of the energy storage device is mastered, which is conducive to reasonable planning of energy storage use, realizes efficient storage and release of energy, for highway energy-using equipment, using low-power LoRa protocol, wireless communication mode with transmission distance not less than 10 kilometers, the real-time power demand and working state data of road lighting equipment and traffic monitoring equipment are transmitted to the control center, the equipment operation condition can be remotely and efficiently monitored, the energy demand change of the equipment is responded in time, the stable operation of the equipment is ensured, and then the effective docking of energy supply and energy-using equipment demand is realized, and the operation efficiency and reliability of the entire highway energy system are improved.

[0026] In S2, data analysis includes analyzing the intermittency and volatility of solar energy and wind energy, the stability of the power supply, and the charging and discharging characteristics of the energy storage device, and using time series analysis algorithm to process the collected energy data to predict the output power change trend of solar energy and wind energy in the next 1-3 hours. The demand situation includes the change rule and peak demand situation of highway energy demand in different time periods and different road sections, and the energy demand data in different time periods and road sections is classified by clustering analysis method, and at least 5 typical energy-using modes are divided.

[0027] Specifically, by analyzing the intermittency and volatility of solar energy and wind energy, the stability of the power supply, and the charging and discharging characteristics of the energy storage device, and using time series analysis algorithm to predict the output power change trend of solar energy and wind energy in the next 1-3 hours, the dynamic change of energy supply can be known in advance, which provides a basis for reasonable arrangement of energy dispatching, at the same time, the change rule and peak demand situation of highway energy demand in different time periods and different road sections are sorted out, and at least 5 typical energy-using modes are divided by clustering analysis method, which can clearly show the characteristics of energy demand, realize accurate matching of energy supply and demand, improve energy utilization efficiency, reduce energy waste, ensure stable and efficient operation of highway energy system, and ensure optimization of energy distribution under different energy supply and energy-using scenarios.

[0028] In S3, the direct current output by solar energy is converted by a DC-DC converter with synchronous rectification technology to meet the voltage requirements of direct current load or energy storage device; for alternating current of the power supply, a rectifier circuit is used to convert it into stable direct current; Wind power generation, according to the output characteristics of the fan, a circuit containing rectification and DC-DC conversion is designed to realize efficient AC / DC conversion of wind energy.

[0029] Specifically, the DC-DC converter adopting the synchronous rectification technology can convert the direct current output by the solar energy into a form of electric energy required by a direct current load or a voltage required by an energy storage device, improve the utilization efficiency of solar energy, and ensure the safe and stable operation of the equipment. The rectification circuit is used to convert the alternating current of the commercial power into stable direct current to provide an adaptive power supply for the direct current electrical equipment. For wind power generation, the circuit containing rectification and DC-DC conversion is designed according to the output characteristics of the fan, which can realize efficient AC / DC conversion of wind energy, meet the demand of different energy use scenarios for the form of electric energy, make all kinds of energy be connected to the system and be reasonably utilized, and improve the compatibility of the entire energy system and the flexibility and efficiency of energy utilization.

[0030] In S4, the converter is adjusted according to the switching frequency and duty cycle of the converter, and according to the change amount and rate of the energy input and the load demand. In the steady state, the energy with low cost and sufficient residual power is preferentially used.

[0031] Specifically, by adjusting the converter parameters according to the switching frequency and duty cycle of the converter, and according to the change amount and rate of the energy input and the load demand, the power can be accurately adjusted in the transient process of the sudden change of the energy input or the load demand, the stability and continuity of the energy supply are ensured, in the steady state, the energy with low cost and sufficient residual power is preferentially used, the energy distribution can be effectively optimized, the energy use cost is reduced, the economy of energy utilization is improved, the entire energy system can be efficiently operated under different working conditions, and the overall performance and resource utilization rate of the system are improved.

[0032] In S5, when the voltage is too high, the converter of the energy storage device charging circuit is controlled to increase the charging power or reduce the output power of part of the power generation equipment, and when the voltage is too low, the energy storage device is controlled to discharge and the output power of the power generation equipment is adjusted to maintain the direct current bus voltage within a stable range.

[0033] Specifically, by controlling the converter of the energy storage device charging circuit to increase the charging power or reduce the output power of part of the power generation equipment when the direct current bus voltage is too high, and by controlling the energy storage device to discharge and adjusting the output power of the power generation equipment when the voltage is too low, the direct current bus voltage can be effectively maintained within a reasonable range, the damage to the downstream energy use equipment caused by excessive voltage fluctuation can be avoided, the stable operation of the equipment can be ensured, the reliability of energy transmission and use can be ensured, the stability and safety of the entire energy system can be improved, and all devices can work cooperatively without being disturbed by abnormal voltage, thereby improving the overall performance of the energy system.

[0034] In S6, when the sunlight is sufficient and the load demand is low during the day, the solar energy is preferentially used for power supply, and the excess electric energy is stored in the energy storage device. In the night or in bad weather, the energy storage device and the commercial power supply cooperatively. A priority mechanism is set, and the commercial power is used as a backup power source and is used only when other power sources cannot meet the demand.

[0035] Specifically, through the priority mechanism, multiple optimization effects can be achieved: first, clean solar power is preferentially used during periods of sufficient light, and the power is directly supplied to the load or stored in the energy storage device through an efficient DC-DC converter, thereby maximizing the use of renewable energy; second, the energy storage device plays a key buffering role in the system, can be used as a main power source during insufficient light, and can maintain the stability of the DC bus voltage by regulating the charging and discharging power to suppress power fluctuations, and the commercial power is only used in extreme cases, thereby ensuring power supply reliability and significantly reducing the cost of using commercial power, realizing intelligent scheduling of energy supply, and significantly improving the overall energy efficiency of the system, which is suitable for complex and variable energy demand scenarios of road transportation.

[0036] Embodiment two: Referring to Figure 2 In the second embodiment of the present application, the present application provides a control system for efficient conversion of multi-state energy supply and demand coordination, which comprises: An energy and demand information acquisition module for acquiring multi-state energy data and road energy consumption equipment data in real time, and transmitting the data wirelessly through a low-power LoRa protocol; An energy dynamic characteristic and energy demand analysis module connected with the energy and demand information acquisition module, for receiving the collected data, analyzing energy characteristics, predicting energy power changes, analyzing energy demand rules, and dividing typical energy consumption modes to provide a basis for subsequent links; A multi-type AC / DC efficient conversion module connected with the energy and demand information acquisition module and the energy dynamic characteristic and energy demand analysis module, for converting different energies according to the analysis results, meeting the voltage requirements of the load and the energy storage, and realizing efficient AC / DC conversion of wind energy; A multi-converter transient and steady-state power balance control module connected with the multi-type AC / DC efficient conversion module, for adjusting the power quickly in transient state and distributing the power according to cost, power and demand in steady state based on the converted energy, to ensure stable supply; A DC bus stable control module connected with the multi-converter transient and steady-state power balance control module, for monitoring the DC bus voltage and current, controlling the energy storage and power generation equipment when fluctuating, introducing compensation technology, and ensuring voltage stability; A supply and demand coordination strategy generation and execution module connected with the energy and demand information acquisition module, the energy dynamic characteristic and energy demand analysis module, the multi-type AC / DC efficient conversion module, and the multi-converter transient and steady-state power balance control module, for formulating a coordination strategy based on the information from all parties, controlling the energy access and the converter parameters, and realizing reasonable distribution and efficient use of energy.

[0037] Specifically, the energy and demand information collection module collects multi-state energy data and highway energy-consuming equipment data in real time, and transmits these data wirelessly through a low-power LoRa protocol, thereby providing comprehensive and real-time basic information for the entire system, so that the subsequent modules can analyze and make decisions based on accurate data, and ensure real-time perception of energy supply and energy demand by the system; The energy dynamic characteristics and energy demand analysis module receives the collected data, deeply analyzes the energy characteristics, predicts the energy power change trend, sorts out the energy demand rules and divides the typical energy consumption mode, thereby providing a scientific basis for subsequent energy conversion, distribution and control, realizing accurate connection of energy supply and demand, improving energy utilization efficiency, reducing energy waste, and enhancing the ability of the system to cope with complex energy and energy consumption conditions; The multi-type AC / DC high-efficiency conversion module converts different energies according to the analysis results to meet the voltage requirements of the load and energy storage device, realizes efficient AC / DC conversion of wind energy, converts various energies into appropriate electrical energy forms, improves energy adaptability, ensures that different energies can be effectively connected to the system and reasonably utilized, and improves the compatibility of the energy system and the flexibility and efficiency of energy utilization; The multi-converter transient and steady-state power balance control module adjusts the power according to the energy input and load demand change in the transient state, and evenly distributes the power according to the energy cost, remaining power and load demand in the steady state based on the converted energy, thereby realizing the stability and economy of energy supply under different working conditions, improving the operation efficiency and reliability of the energy system, realizing the optimal allocation of energy, and ensuring stable operation of the system; The DC bus stable control module controls the energy storage and power generation equipment when the voltage fluctuates, and introduces compensation technology to ensure voltage stability, realizes maintaining the stability of the DC bus voltage, provides reliable power supply for the subsequent energy-consuming equipment, avoids damage to the equipment caused by voltage fluctuation, ensures the reliability of energy transmission and use, and improves the stability and safety of the entire energy system; The supply and demand collaborative strategy generation and execution module realizes accurate matching of energy supply and demand, optimizes energy distribution, realizes full utilization of various energy resources, improves energy utilization efficiency, reduces energy cost, and improves the overall performance and sustainability of the highway transportation energy system.

[0038] Embodiment three In the third embodiment of the present application, based on the same inventive concept, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to realize the steps of the above-mentioned multi-state energy efficient conversion and control method for supply and demand collaboration.

[0039] Embodiment four The fourth embodiment of the present application is based on the same inventive concept, and the present application provides a computer device, which comprises a processor and a memory; the processor and the memory are in communication with each other; the memory is used for storing instructions; and the processor is used for executing the instructions in the memory to execute the multi-state energy efficient conversion and control method for supply-demand cooperation of the above-mentioned embodiments.

[0040] It should be understood that parts of the present application can be realized in hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be realized by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if realized in hardware, and as in another embodiment, any one or a combination of the following technologies known in the art can be used: discrete logic circuit with logic gate circuit for implementing logic functions on data signals, application specific integrated circuit with suitable combination logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA), etc.

[0041] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for efficient conversion and control of multi-state energy with coordinated supply and demand, characterized in that: The following steps are involved: S1. Energy and demand information collection: Real-time collection of multi-state energy data, and monitoring of the real-time power demand and working status of highway traffic energy-consuming equipment; S2. Energy dynamic characteristics and energy demand analysis: Based on the collected energy data, perform data analysis and combine it with the energy-consuming equipment data to sort out the demand situation; S3. Multi-type AC / DC high-efficiency conversion: Design and implement multi-type AC / DC high-efficiency conversion based on energy type and energy-consuming equipment requirements; S4. Transient and steady-state power balancing control of multiple converters: During transient conditions, when energy input or load demand changes suddenly, the converters make adjustments. During steady-state conditions, the converters make adjustments based on the generation cost of each energy source, the remaining power, and the load demand. S5, DC bus stabilization control: Real-time monitoring of the DC bus voltage and current. When the DC bus voltage fluctuates, the control mechanism is activated and voltage compensation technology is introduced to dynamically compensate the DC bus voltage. S6, Supply and Demand Collaboration Strategy Generation and Execution: Based on the dynamic characteristics of energy collection in S1, the energy demand analysis results in S2, and the DC bus stability control in S3, a supply and demand coordination strategy is formulated. Through the formulated strategy, the switch and converter parameters of each energy access point are controlled; In S1, the polymorphic energy data includes the output power, voltage, and current data of solar energy, wind energy, and mains energy, as well as the power and charge and discharge status of the energy storage device. The output power, voltage, and current data of solar energy, wind energy, and mains energy are collected by using sensors; The highway traffic energy-consuming equipment includes road lighting equipment and traffic monitoring equipment, and uses wireless communication to transmit the real-time power demand and working status data of the energy-consuming equipment to the control center. The communication protocol uses the low-power LoRa protocol, and the transmission distance is not less than 10 kilometers.

2. The method for efficient conversion and control of multi-state energy with coordinated supply and demand according to claim 1, characterized in that: In S2, the data analysis includes analyzing the intermittency and volatility of solar and wind energy, the stability of the mains electricity, and the charge and discharge characteristics of the energy storage device. The collected energy data is processed using a time series analysis algorithm to predict the output power change trend of solar and wind energy in the next 1-3 hours. The demand situation is sorted out, including sorting out the changing patterns and peak demand of highway traffic energy demand in different time periods and different road sections, classifying the energy demand data of different time periods and road sections through cluster analysis method, and dividing at least 5 typical energy consumption modes.

3. The method for efficient conversion and control of multi-state energy with coordinated supply and demand according to claim 1, characterized in that: In S3, the DC power output by solar cells is stepped up or down by a DC-DC converter using synchronous rectification technology to meet the voltage requirements of the DC load or energy storage device. The AC power from the mains is converted into stable DC power using a rectifier circuit. For wind power generation, circuits including rectification and DC-DC conversion are designed according to the output characteristics of the wind turbine to achieve efficient AC / DC conversion of wind energy.

4. The method for efficient conversion and control of multi-state energy with coordinated supply and demand according to claim 1, characterized in that: In S4, the converter is adjusted based on the parameters of the switching frequency and duty cycle of the converter, and the parameters of the converter are adjusted according to the change amount and change rate of the energy input and the load demand; In steady state, energy with low cost and sufficient remaining power is used first.

5. The method for efficient conversion and control of multi-state energy with coordinated supply and demand according to claim 1, characterized in that: In S5, if the voltage is too high, the converter of the energy storage device charging circuit is controlled to increase the charging power or reduce the output power of some power generation equipment. If the voltage is too low, the energy storage device is controlled to discharge and the output power of the power generation equipment is adjusted to maintain the DC bus voltage within a stable range.

6. The method for efficient conversion and control of multi-state energy with coordinated supply and demand according to claim 1, characterized in that: In S6, when there is sufficient sunlight during the day and the load demand is small, solar power is used first and the excess power is stored in the energy storage device. At night or in bad weather, the energy storage device and the mains electricity are used to provide power in a coordinated manner. A priority mechanism is set up, and the mains electricity is used as a backup energy source and is only put into use when other energy sources cannot meet demand.

7. A control system for efficient conversion of multi-state energy with coordinated supply and demand, characterized by: A method for efficient conversion and control of multi-state energy for supply and demand coordination according to any one of claims 1 to 6, the system comprising: Energy and demand information collection module, used to collect multi-state energy data and highway energy equipment data in real time, and transmit data wirelessly via the low-power LoRa protocol; The energy dynamic characteristics and energy demand analysis module is connected to the energy and demand information collection module to receive and collect data, analyze energy characteristics, predict energy power changes, sort out energy demand patterns, and classify typical energy consumption patterns to provide a basis for subsequent links; The multi-type AC / DC high-efficiency conversion module is connected to the energy and demand information acquisition module and the energy dynamic characteristics and energy demand analysis module. It is used to convert different energy sources based on the analysis results to meet the load and energy storage voltage requirements and realize efficient AC / DC conversion of wind energy; The multi-converter transient and steady-state power balancing control module is connected to the multi-type AC / DC high-efficiency conversion module. It is used to quickly adjust the power in transient state based on the converted energy and distribute the power in steady state based on cost, power consumption and demand to ensure stable supply. The DC bus stabilization control module is connected to the multi-converter transient and steady-state power balancing control module to monitor the DC bus voltage and current, control the energy storage and power generation equipment when there are fluctuations, and introduce compensation technology to ensure voltage stability; The supply and demand coordination strategy generation and execution module is connected to the energy and demand information collection module, the energy dynamic characteristics and energy demand analysis module, the multi-type AC / DC high-efficiency conversion module and the multi-converter transient and steady-state power balancing control module. It is used to integrate information from all parties to formulate coordination strategies, control energy access and converter parameters, and achieve reasonable energy distribution and efficient utilization.

8. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, it implements a supply-demand coordinated multi-state energy efficient conversion and control method as described in any one of claims 1 to 6.

9. A readable storage medium, characterized in that: The readable storage medium stores a computer program, which, when executed by a processor, implements a supply-demand coordinated multi-state energy efficient conversion and control method as described in any one of claims 1 to 6.

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