Low-voltage direct-current ice melting method, system and device based on energy recovery technology

Abstract

The invention provides a low-voltage direct-current ice melting method, system and device based on an energy recovery technology, and relates to the technical field of power system winter maintenance and disaster prevention and control, and the method comprises the steps: converting alternating current in an alternating-current power grid into direct current based on a direct-current generator; obtaining a target ice melting line, transmitting the direct current to the target ice melting line based on the direct current generator, and starting ice melting operation; in the ice melting process, energy recovery is carried out on the target ice melting line based on the energy recovery device, so that redundant electric energy and a large amount of heat generated in the ice melting process can be fully recovered and reused, the energy utilization efficiency is improved, the operation cost is reduced, the flexibility of multi-line ice melting of the distribution network system can be improved, and the practicability is high. Intelligent ice melting control operation is achieved, the accuracy and safety of ice melting operation are greatly improved, manual intervention is reduced, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of winter maintenance and disaster prevention of power systems, and particularly to a low-voltage DC ice melting method, system and device based on energy recovery technology. Background Art

[0002] The problem of ice coating on transmission lines in winter seriously affects the safe and stable operation of power systems. Traditional mechanical ice removal and chemical ice melting methods have many drawbacks. For example, mechanical ice removal methods require a large amount of manpower and material resources, have low efficiency, and may cause damage to transmission lines during operation; chemical ice melting methods are costly and cause more pollution to the surrounding environment such as soil and water sources.

[0003] Although conventional DC ice melting technology can effectively melt ice layers, there is an energy waste problem. During the ice melting process, surplus electric energy and a large amount of waste heat are generated. Existing technologies lack effective means for recovery and reuse. The waste of these energies not only increases the cost of ice melting operations but also has a greater impact on the environment. In addition, when the distribution network system faces the ice melting requirements of multiple lines, its flexibility and support are insufficient, making it difficult to achieve efficient multi-line ice melting operations, which limits the ice melting efficiency and coverage. At the same time, existing technologies lack intelligent control means and cannot accurately match the actual line conditions with the current ice melting power, thus resulting in poor ice melting effect and low energy consumption management efficiency.

[0004] Therefore, it is necessary to provide a low-voltage DC ice melting method, system and device based on energy recovery technology to solve the above technical problems. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a low-voltage DC ice melting method, system and device based on energy recovery technology, which are used to solve the problems of energy waste, insufficient flexibility in multi-line ice melting operations, and lack of intelligent control in existing DC ice melting technologies.

[0006] The low-voltage DC ice melting method based on energy recovery technology provided by the present invention includes: Based on a DC generator, converting alternating current in the AC power grid into direct current; Obtaining a target ice melting line, and based on the DC generator, delivering the direct current to the target ice melting line and starting the ice melting operation; During the ice melting process, energy recovery is performed on the target ice melting line based on an energy recovery device.

[0007] Preferably, the converting the alternating current in the AC power grid into direct current based on the DC generator specifically includes: Connecting the DC generator to the AC power grid; Filter the harmonics and clutter in the AC power grid based on the filter circuit inside the DC generator; Based on the rectifier circuit inside the DC generator, convert the alternating current in the filtered AC power grid into pulsating direct current, and then perform smoothing processing and frequency adjustment on the pulsating direct current through the inverter circuit inside the DC generator to obtain the direct current.

[0008] Preferably, collect the current ice coating thickness of the target ice melting line based on the ice coating thickness detection device, and collect the current ambient temperature corresponding to the target ice melting line based on the temperature sensor; Calculate the expected output parameters of the DC generator according to the current ice coating thickness and the current ambient temperature; Adjust the current output parameters of the DC generator to the expected output parameters.

[0009] Preferably, the expected output parameters are expected to include an expected output voltage and an expected output current. The calculation formula for the expected output voltage is as follows: In the formula, represents the expected output voltage; represents the standard output voltage, that is, the voltage required for ice melting operation under standard ice coating thickness and standard ambient temperature conditions; represents the influence coefficient of ambient temperature on voltage; represents the difference between the current ambient temperature and the standard ambient temperature; represents the correction function of ice coating thickness on voltage; represents the correction coefficient of ice coating thickness on voltage; d represents the current ice coating thickness; represents the line length correction function; represents the line length correction coefficient; L represents the length of the target ice melting line; The calculation formula for the expected output current is as follows: In the formula, represents the expected output current; represents the standard output current, that is, the current required for ice melting operation under standard ice coating thickness and standard ambient temperature conditions; represents the influence coefficient of ambient temperature on current; represents the correction function of ice coating thickness on current; represents the correction coefficient of ice coating thickness on current.

[0010] Preferably, the energy recovery device includes a super capacitor and a heat exchanger; During the ice melting process, the current line power of the target ice melting line is monitored in real time. When the current line power exceeds the ice melting required power, the charging mechanism of the supercapacitor is triggered. The calculation formulas for the charging voltage and current of the supercapacitor are as follows: In the formula, represents the charging voltage of the supercapacitor; represents the initial charging voltage of the supercapacitor; represents the charging voltage influence coefficient; represents the current line power of the target ice melting line; represents the ice melting required power of the target ice melting line; represents the current charge of the supercapacitor; represents the maximum charge of the supercapacitor; represents the charging current of the supercapacitor; represents the charging current influence coefficient; The heat exchanger is used to collect the heat energy in the ice melting process in real time. When the energy conversion efficiency of the heat exchanger is lower than the preset efficiency threshold, the rotation speed of the circulating pump of the heat exchanger is adjusted until the energy conversion efficiency is not lower than the preset efficiency threshold.

[0011] Preferably, when the supercapacitor meets the following preset discharge conditions, the discharge mechanism of the supercapacitor is triggered: In the formula, represents the ice melting required power of the target ice melting line; represents the discharge trigger coefficient; represents the rated discharge power of the supercapacitor; represents the current line power of the target ice melting line; represents the current charge of the supercapacitor; represents the minimum charge of the supercapacitor; After triggering the discharge mechanism of the supercapacitor, calculate the comprehensive working state index of the supercapacitor as follows: In the formula, ZHZB represents the comprehensive working state index of the supercapacitor; represents the index balance coefficient; represents the current charge of the supercapacitor; represents the maximum charge of the supercapacitor; represents the current discharge power of the supercapacitor; represents the rated discharge power of the supercapacitor; If the comprehensive working state index of the supercapacitor deviates from the normal index range, adjust the charging and discharging time windows of the supercharger until the comprehensive working state index is within the normal index range.

[0012] Preferably, when receiving an access request for the next de-icing line, automatically obtain the line parameters of the next de-icing line; Adopt the optimal path algorithm, and determine the fusion access strategy of the next de-icing line according to the operating state of the accessed target de-icing line and the line parameters; Based on the fusion access strategy, control the line connection operation of the target de-icing line and the next de-icing line, and after the connection is completed, automatically start the de-icing operation of the next de-icing line.

[0013] A low-voltage DC de-icing system based on energy recovery technology, the de-icing system includes: A DC generator for converting the alternating current in the AC power grid into the direct current; An energy recovery device for integrating the supercapacitor and the heat exchanger, and synchronously recovering electric energy and heat energy for the target de-icing line; A control unit for monitoring the de-icing process of the target de-icing line in real time and automatically adjusting the working parameters of the DC generator and the energy recovery device; A power distribution unit for integrating an intelligent switch matrix, a real-time protection device and a cable interface, and supporting the access and switching operations of multiple de-icing lines.

[0014] A low-voltage DC de-icing device based on energy recovery technology, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor runs the computer program stored in the memory, the processor executes the low-voltage DC de-icing method based on energy recovery technology as described in any one of the above.

[0015] Compared with the related technologies, the low-voltage DC de-icing method, system and device based on energy recovery technology provided by the present invention have the following beneficial effects: The present invention can convert the alternating current in the AC power grid into direct current based on the DC generator; obtain the target de-icing line, and deliver the direct current to the target de-icing line based on the DC generator and start the de-icing operation; during the de-icing process, energy recovery is performed on the target de-icing line based on the energy recovery device, so that the redundant electric energy and a large amount of heat generated during the de-icing process can be fully recovered and reused, improving the flexibility of multi-line de-icing of the distribution network system and realizing intelligent de-icing control operations.

[0016] The present invention can continuously and dynamically monitor the line de-icing state, automatically adjust the operating parameters of the DC generator, and achieve the goal of energy conservation and emission reduction. Through an automated energy recovery and redistribution mechanism, the present invention significantly reduces the energy consumption during the de-icing process, improves the energy utilization efficiency, and reduces the operating cost. The present invention supports a fast access mechanism, ensuring the convenience and efficiency of multi-line de-icing operations, and enhancing the ability of the distribution network system to withstand extreme weather. The system of the present invention greatly improves the accuracy and safety of de-icing operations, enhances the intelligent level of de-icing operations, reduces manual intervention, and reduces potential safety hazards. Description of the Drawings

[0017] Figure 1 It is a flowchart of the low-voltage DC de-icing method based on energy recovery technology provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the DC generator provided by an embodiment of the present invention; Figure 3 It is a flowchart of converting alternating current to direct current provided by an embodiment of the present invention; Figure 4 It is a system block diagram of the low-voltage DC de-icing system based on energy recovery technology provided by an embodiment of the present invention; Figure 5 It is a schematic diagram of the hardware structure of the low-voltage DC de-icing device based on energy recovery technology provided by an embodiment of the present invention. Detailed Embodiments

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] As Figure 1 shown, it is a flowchart of the low-voltage DC de-icing method based on energy recovery technology provided by an embodiment of the present invention, Figure 1The execution entity of the method shown can be a software and / or hardware device. The execution entity of this application can include but is not limited to at least one of the following: user equipment, network equipment, etc. Among them, the user equipment can include but is not limited to computers, smart phones, personal digital assistants (Personal Digital Assistant, abbreviated as: PDA), and the electronic devices mentioned above, etc. The network equipment can include but is not limited to a single network server, a server group composed of multiple network servers, or a cloud composed of a large number of computers or network servers based on cloud computing. Among them, cloud computing is a type of distributed computing, consisting of a group of loosely coupled computers forming a super virtual computer. This embodiment does not limit this. It includes steps S1 to S3, specifically as follows: S1, based on a DC generator, convert the alternating current in the AC power grid into direct current; Among them, as Figure 2 shown, the DC generator refers to an electrical device used to achieve AC-DC conversion. It can convert the alternating current in the AC power grid into direct current through its internal circuit structure and electromagnetic conversion principle, providing a suitable DC power supply for subsequent ice melting operations.

[0020] S2, obtain the target ice melting line, and based on the DC generator, deliver the direct current to the target ice melting line and start the ice melting operation; It can be understood that the target ice melting line refers to the transmission line that needs to perform ice melting operations.

[0021] It should be noted that since the target ice melting line is covered by ice, its power transmission process may be severely affected. Therefore, direct current can be delivered to the target ice melting line through power transmission facilities such as cables, and the line ice melting operation can be started, thereby melting the ice on the line.

[0022] S3, during the ice melting process, perform energy recovery on the target ice melting line based on an energy recovery device.

[0023] Among them, the energy recovery device refers to a device used to recover energy from the ice melting line. This device integrates a supercapacitor and a heat exchanger.

[0024] When there is an excess of electrical energy in the ice melting line, the supercapacitor can store the excess electrical energy; at the same time, the heat exchanger can collect the heat energy generated during the ice melting process and convert it into an available energy form, such as hot water or steam, thereby achieving energy recovery and reuse, effectively improving the energy utilization efficiency of the ice melting process.

[0025] In the specific implementation process, as Figure 3 shown, the step of converting the alternating current in the AC power grid into direct current based on the DC generator specifically includes: Connect the DC generator to the AC power grid; Based on the filter circuit inside the DC generator, filter the harmonics and clutter in the AC power grid; Based on the rectifier circuit inside the DC generator, convert the alternating current in the filtered AC power grid into pulsating direct current, and then perform smoothing processing and frequency adjustment on the pulsating direct current through the inverter circuit inside the DC generator to obtain the direct current.

[0026] In practical applications, first, the DC generator can be connected to the AC power grid. The AC power grid refers to a widely distributed power supply network that can provide alternating current for various electrical equipment.

[0027] After connecting to the power grid, based on the filter circuit inside the DC generator, filter the harmonics and clutter in the AC power grid. Among them, harmonics refer to the frequency components in the current or voltage other than the fundamental wave, and clutter refers to various irregular interference signals existing in the power grid. These harmonics and clutter will affect the normal operation of electrical equipment. The filter circuit can effectively remove these harmonics and clutter through specific inductors, capacitors and other components.

[0028] Then, based on the rectifier circuit inside the DC generator, convert the positive and negative alternating characteristics of the alternating current into a single characteristic to obtain the converted pulsating direct current. However, the pulsed direct current at this time is not stable and often presents a pulsating state.

[0029] Furthermore, the pulsating direct current can be smoothed and frequency-adjusted through the inverter circuit inside the DC generator to obtain stable direct current.

[0030] Collect the current ice coating thickness of the target de-icing line based on the ice coating thickness detection device, and collect the current ambient temperature corresponding to the target de-icing line based on the temperature sensor; Calculate the expected output parameters of the DC generator according to the current ice coating thickness and the current ambient temperature; Adjust the current output parameters of the DC generator to the expected output parameters.

[0031] Among them, the ice coating thickness detection device refers to a device used to measure the ice layer thickness on the transmission line, such as laser ranging type, image recognition type, etc. The temperature sensor refers to a device used to measure the ambient temperature around the target de-icing line, which can collect the ambient temperature in real time and convert it into an electrical signal.

[0032] Subsequently, based on the currently measured ice accretion thickness and ambient temperature, combined with the physical characteristics of the de-icing line and the principles of heat transfer, etc., the expected output parameters of the DC generator can be calculated. For example, the thicker the ice accretion, the greater the de-icing power required, and at this time, the output voltage and current of the DC generator may be higher; while the lower the ambient temperature, the greater the difficulty of de-icing, and at this time, it is necessary to timely adjust the output parameters of the DC generator to ensure the effect of the de-icing operation.

[0033] Finally, the current output parameters of the DC generator can be automatically adjusted to the expected output parameters, optimizing the working state of the internal circuit of the DC generator, and then a suitable power supply can be provided for the target de-icing line to achieve the goal of efficient de-icing.

[0034] The expected output parameters are expected to include the expected output voltage and the expected output current. The calculation formula for the expected output voltage is as follows: In the formula, represents the expected output voltage; represents the standard output voltage, that is, the voltage required for the de-icing operation under the conditions of standard ice accretion thickness and standard ambient temperature; represents the influence coefficient of the ambient temperature on the voltage; represents the difference between the current ambient temperature and the standard ambient temperature; represents the correction function of the ice accretion thickness on the voltage; represents the correction coefficient of the ice accretion thickness on the voltage; d represents the current ice accretion thickness; represents the line length correction function; represents the line length correction coefficient; L represents the length of the target de-icing line; The calculation formula for the expected output current is as follows: In the formula, represents the expected output current; represents the standard output current, that is, the current required for the de-icing operation under the conditions of standard ice accretion thickness and standard ambient temperature; represents the influence coefficient of the ambient temperature on the current; represents the correction function of the ice accretion thickness on the current; represents the correction coefficient of the ice accretion thickness on the current.

[0035] Among them, based on the actual situations such as the current ice accretion thickness, ambient temperature, and line length, etc., the expected output voltage and current can be accurately calculated, thus avoiding the problem of energy waste caused by excessive output voltage and current, as well as the situation of extended de-icing time and increased energy consumption caused by too small output voltage and current, effectively improving the energy utilization efficiency.

[0036] Therefore, even in cold high-altitude areas, appropriate output parameters can be calculated based on the real-time ambient temperature and ice-covering thickness. For example, in areas with relatively low ambient temperatures, by considering the influence coefficients of ambient temperature on voltage and current, the output parameters of the DC generator can be appropriately increased to ensure the smooth progress of the ice melting operation.

[0037] The energy recovery device includes a supercapacitor and a heat exchanger; During the ice melting process, the current line power of the target ice melting line is monitored in real time. When the current line power exceeds the ice melting required power, the charging mechanism of the supercapacitor is triggered. The calculation formulas for the charging voltage and current of the supercapacitor are as follows: In the formula, represents the charging voltage of the supercapacitor; represents the starting charging voltage of the supercapacitor; represents the charging voltage influence coefficient; represents the current line power of the target ice melting line; represents the ice melting required power of the target ice melting line; represents the current charge of the supercapacitor; represents the maximum charge of the supercapacitor; represents the charging current of the supercapacitor; represents the charging current influence coefficient; The heat exchanger is used to collect the heat energy in real time during the ice melting process. When the energy conversion efficiency of the heat exchanger is lower than the preset efficiency threshold, the rotation speed of the circulating pump of the heat exchanger is adjusted until the energy conversion efficiency is not lower than the preset efficiency threshold.

[0038] During the ice melting process, the line power can be monitored in real time. Once it is found that the current line power exceeds the ice melting required power, the charging mechanism of the supercapacitor is immediately triggered. Then, according to the actual line power, the ice melting required power and the charge of the supercapacitor itself, the charging parameters of the supercapacitor can be reasonably adjusted to efficiently store the excess electric energy.

[0039] It should be noted that these stored electric energies can be released when needed and used for other power-consuming links, thereby effectively avoiding electric energy waste, improving the energy utilization rate, and reducing the cost of the ice melting operation.

[0040] Furthermore, the heat exchanger can recycle the heat energy during the ice melting process. It can collect the heat energy generated by ice melting in real time and convert it into an available energy form, such as hot water or steam, etc. When the energy conversion efficiency of the heat exchanger is lower than the preset efficiency threshold, the rotation speed of the internal circulating pump can be adjusted to optimize the energy conversion process.

[0041] Specifically, by adjusting the rotational speed of the circulation pump, the flow rate and heat exchange efficiency of the coolant in the heat exchanger can be changed, gradually improving the energy conversion efficiency until it is not lower than the preset efficiency threshold, thereby ensuring the high efficiency of heat energy recovery and further enhancing the overall energy utilization level.

[0042] Through the above energy recovery device, the energy recovery and utilization efficiency during the ice melting process has been greatly improved, reducing the dependence on external energy, and enhancing the environmental protection performance and economic benefits of the entire ice melting system.

[0043] When the supercapacitor meets the following preset discharge conditions, trigger the discharge mechanism of the supercapacitor: In the formula, represents the ice melting demand power of the target ice melting line; represents the discharge trigger coefficient; represents the rated discharge power of the supercapacitor; represents the current line power of the target ice melting line; represents the current charge of the supercapacitor; represents the minimum charge of the supercapacitor; After triggering the discharge mechanism of the supercapacitor, calculate the comprehensive working state index of the supercapacitor as follows: In the formula, ZHZB represents the comprehensive working state index of the supercapacitor; represents the index balance coefficient; represents the current charge of the supercapacitor; represents the maximum charge of the supercapacitor; represents the current discharge power of the supercapacitor; represents the rated discharge power of the supercapacitor; If the comprehensive working state index of the supercapacitor deviates from the normal index range, adjust the charging and discharging time windows of the supercharger until the comprehensive working state index is within the normal index range.

[0044] When the current line power of the target ice melting line cannot meet the ice melting demand power and the charge of the supercapacitor meets the requirements, trigger the discharge mechanism to release the stored electrical energy, thereby effectively supplementing the electrical energy for ice melting operations, ensuring the smooth progress of ice melting operations, avoiding the problem of low ice melting efficiency caused by insufficient power, and enhancing the stability of the entire ice melting system.

[0045] By comprehensively considering the ratio of the current charge of the supercapacitor to its maximum charge and the ratio of the current discharge power to the rated discharge power, the working condition of the supercapacitor can be comprehensively reflected. Once the comprehensive index of the working state deviates from the normal index range, the charging and discharging time windows of the supercapacitor can be adjusted in a timely manner.

[0046] It should be noted that this adjustment mechanism can optimize the charging and discharging process of the supercapacitor, keep it in a highly efficient and stable working state all the time, extend the service life of the supercapacitor, improve the energy utilization efficiency at the same time, and reduce unnecessary energy losses.

[0047] Through the above method, the efficient and stable operation of the ice melting operation can be guaranteed, the ability of the ice melting system to cope with different ice melting working conditions can be enhanced, and the ice melting cost can be further reduced.

[0048] When receiving the access request of the next ice melting line, automatically obtain the line parameters of the next ice melting line; Adopt the optimal path algorithm, and determine the fusion access strategy of the next ice melting line according to the running state of the accessed target ice melting line and the line parameters; Based on the fusion access strategy, control the line connection operation of the target ice melting line and the next ice melting line, and after the connection is completed, automatically start the ice melting operation of the next ice melting line.

[0049] In practical applications, when receiving the access request of the next ice melting line, the line parameters can be automatically obtained without manual collection and entry, which greatly improves the convenience and efficiency of parameter acquisition, reduces the probability of errors, and provides a reliable data basis for the accurate formulation of subsequent fusion access strategies.

[0050] Furthermore, the optimal path algorithm can be adopted to fully consider the running state of the accessed line and the parameters of the next ice melting line, and formulate the fusion access strategy, so as to minimize the impact of the new line access operation on the original ice melting operation, realize the efficient coordination among various lines, avoid problems such as uneven power distribution and electrical interference among multiple lines, and ensure the stable operation of the entire ice melting system.

[0051] In addition, based on the fusion access strategy, the line connection operation can be automatically controlled and the ice melting operation can be started, so as to realize the high automation of the ice melting process, reduce manual intervention, lower the labor cost, quickly respond to the ice melting requirements of the new line, effectively cope with the icing conditions of complex and changeable transmission lines, enhance the response ability of the distribution network system in extreme weather, and ensure the stability of power supply.

[0052] It should be noted that the fast access mechanism of the ice melting circuit is designed based on a standard plug-and-play interface and an intelligent switch matrix, and the entire process of accessing the ice melting circuit takes an extremely short time, only a few seconds, greatly improving the working efficiency of the ice melting system.

[0053] As Figure 4 shown, it is a system block diagram of a low-voltage DC ice melting system based on energy recovery technology provided by an embodiment of the present invention. The ice melting system includes: A DC generator for converting the alternating current in the AC power grid into the direct current; An energy recovery device for integrating the supercapacitor and the heat exchanger, and synchronously recovering electric energy and heat energy for the target ice melting circuit; A control unit for monitoring the ice melting process of the target ice melting circuit in real time and automatically adjusting the working parameters of the DC generator and the energy recovery device; A power distribution unit for integrating an intelligent switch matrix, a real-time protection device, and a cable interface, and supporting the access and switching operations of multiple ice melting circuits.

[0054] Figure 4 The device of the embodiment shown can correspondingly be used to execute Figure 1 the steps in the method embodiment shown. The implementation principle and technical effects are similar and will not be elaborated here.

[0055] Exemplarily, in the ice removal task of an emergency line in alpine mountainous areas, a low-voltage DC ice melting system based on energy recovery technology is adopted. Specifically, the output voltage of the DC generator can be precisely adjusted according to the line icing condition, and its initial value is set to 500V. The supercapacitor and the heat exchanger work together. The former can store excess electric energy in real time, and the latter can convert the waste heat in the ice melting process into reusable hot water or steam. In addition, the control unit can dynamically analyze the ice melting progress and energy consumption, and correspondingly adjust the working parameters of the DC generator and the energy recovery device to ensure the best ice melting effect while minimizing energy loss. The power distribution unit supports the access and switching operations of multiple ice melting circuits.

[0056] A low-voltage DC ice melting device based on energy recovery technology includes a memory and a processor. A computer program is stored in the memory. When the processor runs the computer program stored in the memory, the processor executes the low-voltage DC ice melting method based on energy recovery technology as described in any one of the above.

[0057] As Figure 5 shown, it is a schematic diagram of the hardware structure of a low-voltage DC ice melting device based on energy recovery technology provided by an embodiment of the present invention. The low-voltage DC ice melting device 50 based on energy recovery technology includes: a processor 51, a memory 52, and a computer program; wherein A memory 52 for storing the computer program, which may also be a flash memory. The computer program is, for example, an application program, a functional module, etc. for implementing the above method.

[0058] A processor 51 for executing the computer program stored in the memory to implement each step performed by the device in the above method. For specific details, reference may be made to the relevant descriptions in the foregoing method embodiments.

[0059] Optionally, the memory 52 may be either independent or integrated with the processor 51.

[0060] When the memory 52 is a device independent of the processor 51, the device may further include: A bus 53 for connecting the memory 52 and the processor 51.

[0061] The present invention also provides a readable storage medium storing a computer program, which is used to implement the methods provided in the above various embodiments when being executed by a processor.

[0062] Among them, the readable storage medium may be a computer storage medium or a communication medium. The communication medium includes any medium facilitating the transmission of a computer program from one place to another. The computer storage medium may be any available medium accessible by a general or special computer. For example, the readable storage medium is coupled to the processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium may also be a component of the processor. The processor and the readable storage medium may be located in an application specific integrated circuit (ASIC). Additionally, the ASIC may be located in a user device. Of course, the processor and the readable storage medium may also exist as discrete components in a communication device. The readable storage medium may be a read only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0063] The present invention also provides a program product including execution instructions stored in a readable storage medium. At least one processor of the device can read the execution instructions from the readable storage medium, and the execution of the execution instructions by at least one processor causes the device to implement the methods provided in the above various embodiments.

[0064] In the embodiments of the above device, it should be understood that the processor can be a central processing unit (CPU for short), or other general-purpose processors, digital signal processors (DSP for short), application specific integrated circuits (ASIC for short), etc. The general-purpose processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in combination with the present invention can be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.

[0065] Through the introduction of the above embodiments, the present invention provides a low-voltage DC ice melting method, system and device based on energy recovery technology, which can convert alternating current in an AC power grid into direct current based on a DC generator; obtain a target ice melting line, and deliver the direct current to the target ice melting line based on the DC generator and start the ice melting operation; during the ice melting process, energy recovery is performed on the target ice melting line based on an energy recovery device, so that the excess electric energy and a large amount of heat generated during the ice melting process can be fully recovered and reused, improving the flexibility of multi-line ice melting in the distribution network system and realizing intelligent ice melting control operations.

[0066] The present invention can continuously and dynamically monitor the ice melting state of the line, automatically adjust the working parameters of the DC generator, and achieve the goal of energy conservation and emission reduction. Through the automated energy recovery and redistribution mechanism, the present invention significantly reduces the energy consumption during the ice melting process, improves the energy utilization efficiency, and reduces the operating cost. The present invention supports a fast access mechanism, ensuring the convenience and high efficiency of multi-line ice melting operations, and enhancing the ability of the distribution network system to resist extreme weather. The system of the present invention greatly improves the accuracy and safety of ice melting operations, improves the intelligent level of ice melting operations, reduces manual intervention, and reduces potential safety hazards.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-voltage DC ice melting method based on energy recovery technology, characterized in that, The ice melting method includes: Based on a DC generator, converting alternating current in the AC power grid into direct current; Obtaining a target ice melting line, and delivering the direct current to the target ice melting line based on the DC generator and starting the ice melting operation; During the ice melting process, energy recovery is performed on the target ice melting line based on an energy recovery device.

2. The low-voltage DC ice melting method based on energy recovery technology according to claim 1, wherein The converting of the alternating current in the AC power grid into direct current based on the DC generator specifically includes: Connecting the DC generator to the AC power grid; Filtering harmonics and clutter in the AC power grid based on a filter circuit inside the DC generator; Based on a rectifying circuit inside the DC generator, converting the alternating current in the filtered AC power grid into pulsating direct current, and then performing smoothing processing and frequency adjustment on the pulsating direct current through an inverter circuit inside the DC generator to obtain the direct current.

3. The low-voltage DC ice melting method based on energy recovery technology according to claim 1, wherein, Collecting the current ice thickness of the target ice melting line based on an ice thickness detection device, and collecting the current ambient temperature corresponding to the target ice melting line based on a temperature sensor; Calculating the expected output parameters of the DC generator according to the current ice thickness and the current ambient temperature; Adjusting the current output parameters of the DC generator to the expected output parameters.

4. The low-voltage DC ice melting method based on energy recovery technology according to claim 3, characterized in that, The expected output parameters are expected to include an expected output voltage and an expected output current. The calculation formula for the expected output voltage is as follows: In the formula, represents the expected output voltage; represents the standard output voltage, that is, the voltage required for the ice melting operation under the conditions of standard ice covering thickness and standard ambient temperature; represents the influence coefficient of ambient temperature on voltage; represents the difference between the current ambient temperature and the standard ambient temperature; represents the correction function of ice covering thickness on voltage; represents the correction coefficient of ice covering thickness on voltage; d represents the current ice coating thickness; represents the line length correction function; represents the line length correction coefficient; L represents the length of the target de-icing line; The calculation formula for the expected output current is as follows: In the formula, represents the expected output current; represents the standard output current, i.e., the current required for the ice melting operation under the conditions of the standard ice coating thickness and the standard ambient temperature; represents the influence coefficient of the ambient temperature on the current; represents the correction function of the ice coating thickness on the current; represents the correction coefficient of the ice coating thickness on the current.

5. The low-voltage DC ice melting method based on energy recovery technology according to claim 1, characterized in that The energy recovery device includes a supercapacitor and a heat exchanger; During the ice melting process, the current line power of the target ice melting line is monitored in real time. If the current line power exceeds the ice melting demand power, a charging mechanism of the supercapacitor is triggered. The calculation formulas for the charging voltage and current of the supercapacitor are as follows: In the formula, represents the charging voltage of the supercapacitor; represents the initial charging voltage of the supercapacitor; represents the charging voltage influence coefficient; represents the current line power of the target de-icing line; represents the de-icing demand power of the target de-icing line; represents the current charge of the supercapacitor; represents the maximum charge of the supercapacitor; represents the charging current of the supercapacitor; represents the charging current influence coefficient; The heat exchanger is used to collect the heat energy in the ice melting process in real time. When the energy conversion efficiency of the heat exchanger is lower than a preset efficiency threshold, the rotation speed of the circulation pump of the heat exchanger is adjusted until the energy conversion efficiency is not lower than the preset efficiency threshold.

6. The low-voltage DC ice melting method based on the energy recovery technology according to claim 5, characterized in that, When the supercapacitor meets the following preset discharge conditions, a discharge mechanism of the supercapacitor is triggered: In the formula, represents the ice melting demand power of the target ice melting line; represents the discharge trigger coefficient; represents the rated discharge power of the supercapacitor; represents the current line power of the target ice melting line; represents the current charge of the supercapacitor; represents the minimum charge of the supercapacitor; After triggering the discharge mechanism of the supercapacitor, calculate the comprehensive working state index of the supercapacitor as follows: In the formula, ZHZB represents the comprehensive index of the working state of the supercapacitor; represents the index balance coefficient; represents the current charge of the supercapacitor; represents the maximum charge of the supercapacitor; represents the current discharge power of the supercapacitor; represents the rated discharge power of the supercapacitor; If the comprehensive working state index of the supercapacitor deviates from the normal index range, adjust the charging and discharging time windows of the supercharger until the comprehensive working state index is within the normal index range.

7. The low-voltage DC ice melting method based on energy recovery technology according to claim 1, wherein, When receiving an access request for the next ice melting line, automatically obtain the line parameters of the next ice melting line; Using an optimal path algorithm, determine the fusion access strategy for the next ice melting line according to the operating state of the already accessed target ice melting line and the line parameters; Based on the fusion access strategy, control the line connection operation of the target ice melting line and the next ice melting line, and after the connection is completed, automatically start the ice melting operation of the next ice melting line.

8. A low-voltage DC ice melting system based on energy recovery technology, which is applied to the low-voltage DC ice melting method based on energy recovery technology according to any one of claims 1-7, characterized in that, The ice melting system includes: A DC generator for converting the alternating current in the AC power grid into the direct current; An energy recovery device, which is used to integrate the supercapacitor and the heat exchanger, and synchronously recover electric energy and heat energy for the target ice melting line; A control unit, which is used to monitor the ice melting process of the target ice melting line in real time and automatically adjust the operating parameters of the DC generator and the energy recovery device; A power distribution unit, which is used to integrate an intelligent switch matrix, a real-time protection device and a cable interface, and support the access and switching operations of multiple ice melting lines.

9. A low-voltage DC ice melting device based on energy recovery technology, characterized in that, It includes a memory and a processor. A computer program is stored in the memory. When the processor runs the computer program stored in the memory, the processor executes the low-voltage DC ice melting method based on energy recovery technology according to any one of claims 1-7.

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