206 results about "Ice melt" patented technology

The invention relates to the technical field of electrical digital data processing, and discloses a train ice melting simulation optimization method of an electromagnetic thermal coupling model fused with a deep learning method, which comprises the following steps of: inputting a geometric representation tensor and a physical working condition parameter vector containing an electromagnetic excitation frequency and a reference environment temperature into a feature mapping neural network; outputting a dual-channel space source item tensor containing basic heat source power density and a heat source to temperature change sensitivity distribution matrix through nonlinear convolution operation; constructing a heat conduction discrete numerical value evolution operator configured with an active item linear correction interface; time stepping operation is executed according to the heat conduction time scale, a basic heat source is corrected in real time through the Hadamard product of a sensitivity distribution matrix and temperature deviation, and an operator is substituted for solution. On the premise that electromagnetic-thermal nonlinear coupling characteristics are reserved, decoupling of the time scale is achieved, and the calculation efficiency in high-frequency physical field simulation is effectively improved.

The invention relates to the technical field of ice prevention and disaster reduction of high-voltage power transmission lines, and discloses a cascaded direct-current ice melting system of a high-voltage power transmission line, a control method and a device. The method comprises the following steps: inputting a test signal to the cascaded direct-current deicing system, and detecting the voltage and current of each node; calculating line impedance distribution based on the voltage and current of each node, and constructing a line equivalent model; calculating the minimum ice melting current based on the ice thickness monitoring data and the weather data, and calculating the output current of each ice melting device based on the minimum ice melting current and the line equivalent model; monitoring circulating current between systems, and calculating virtual compensation voltage based on the circulating current; and adjusting the output voltage of each ice melting device based on the virtual compensation voltage. The ice melting success rate, the safety of the system and the service life of the system can be improved.

The invention discloses a contribution decomposition calculation method for lake expansion. The contribution decomposition calculation method comprises the following steps: extracting a lake area through a remote sensing image and a digital elevation model, inverting water volume change, judging a rainfall phase state by using a temperature threshold method, estimating ice and snow ablation amount in combination with a degree-day factor method, and calculating a glacier runoff total amount; constructing a single-layer evaporation model, calculating flux of net radiation, sensible heat, latent heat, water body heat storage and the like based on a lake surface energy balance equation, and obtaining daily lake surface evaporation capacity; quantile mapping and Bayesian fusion are combined, and lake surface rainfall is corrected; non-glacial runoff is calculated according to a lake water balance equation; dividing a stable period and an expansion period according to the lake area trend, calculating an abnormal value of the expansion period by taking the hydrological mean value of the stable period as a reference, and finally determining the expansion contribution of each hydrological factor according to the increment proportion of the abnormal value in the total water quantity. Through the method, the contribution intensity of different driving factors is determined, scientific support is provided for lake change simulation and evolution prediction, and ecological protection and management strategies are more targeted.

A miniature ice melting device for a high-voltage line comprises an ice melting body, a span string crossing part, an anchor section crossing part, a power source and power supply module, an electric energy obtaining module and a deicing driving module, and is used for obtaining electric energy from a contact line of a railway contact network through the electric energy obtaining module and providing the electric energy for ice melting work of the ice melting body. The deicing driving module and the power supply and power supply module are used for pushing the high-voltage line miniature ice melting device to advance on a contact network, the span string crossing is used for passing through a contact network dropper and a positioner, and the anchor section crossing is used for enabling the high-voltage line miniature ice melting device to smoothly pass through a contact network anchor section joint. The miniature ice melting device for the high-voltage line can continuously deice in a reciprocating manner for a long time in an electric split phase, and meanwhile, the anchor section can move to a catenary bracket led out from a non-working branch of the catenary in advance when a motor train unit or an electric locomotive passes through, so that the influence of deicing equipment on normal operation of the train is avoided, and the working efficiency is improved. The miniature ice melting device for the high-voltage line can save a large amount of manpower and material resources for deicing, and meanwhile, the miniature ice melting device for the high-voltage line can also be used for deicing on other high-voltage lines through simple transformation.

The invention relates to the technical field of road maintenance equipment, in particular to a viaduct ice and snow active identification and removal method and equipment based on deep learning, and aims to realize high-precision and low-delay identification of ice at the bottom of a bridge by replacing a standard convolutional layer in a YOLOv8 backbone network with a GSConv module and constructing a lightweight target detection model; by means of the identified and output position coordinates and size information, the infrared heating plate is guided to be accurately aligned with the root of the ice hanging part, heating parameters are dynamically adjusted, and the ice hanging part naturally falls off after being heated; falling ice blocks enter an ice melting box with a heating layer at the bottom through a collecting tank and a conveying pipeline, are instantly melted into water and are discharged through a drainage pipe, and a closed-loop clearing process without ice storage is formed. Manual intervention is not needed, the bridge body is prevented from being damaged by mechanical impact, the overturning risk of equipment caused by ice storage is eliminated, and the safety, efficiency and automation level of deicing operation are remarkably improved.

A distributed ice melting device topological structure suitable for an ultra-high voltage power transmission line comprises a plurality of ice melting sub-modules arranged in a distributed mode, and each ice melting sub-module comprises a single-turn coupling transformer, a metal oxide voltage limiter, a bypass switch, a filter, an H-bridge current converter and a direct-current capacitor. A primary winding of the single-turn coupling transformer is directly formed by split sub-conductors of the ultra-high voltage power transmission line, and a secondary winding of the single-turn coupling transformer is electrically connected with other parts of the ice melting sub-modules, so that the ice melting sub-modules are connected in series on the split sub-conductors of the power transmission line in a distributed manner; the H-bridge current converter is electrically connected with the direct-current capacitor, and the direct-current capacitor provides smooth direct-current voltage for the H-bridge current converter; the filter is connected in series with the H-bridge current converter, the bypass switch is connected in parallel with the H-bridge current converter, and the metal oxide voltage limiter is connected in parallel with the line side output end of the ice melting sub-module; and the ice melting sub-modules adjust the current of the corresponding split sub-conductors by changing the equivalent impedance of the ice melting sub-modules, so that accurate ice melting of the ice-coated split sub-conductors is realized, and the overall current and the transmission power of the power transmission line are kept unchanged. The technical problem to be solved by the invention is to provide the distributed ice melting device topological structure suitable for the ultra-high voltage power transmission line, and the technical problem that the existing ice melting technology cannot realize accurate ice melting and non-power-cut operation on an ice coating section on the ultra-high voltage power transmission line is solved. And normal transmission of the line is affected due to overlarge capacity demand, line overcurrent or incapability of three-phase synchronous ice melting.

The utility model relates to the technical field of ice making, and solves the problems that when ice blocks are not used up, the ice blocks are melted in an ice making assembly, and the melted water is not collected by a worker, so that water resources are wasted. The ice making assembly comprises a storage frame, a sliding groove is formed in the storage frame, a sealing plate is slidably connected into the sliding groove, a placement frame is clamped into the storage frame, connecting plates are fixedly installed on the two sides of the surface of the placement frame, and a collecting assembly is arranged at the bottoms of the connecting plates. A water tank is fixedly installed on one side of the surface of the storage frame, a guide pipe is arranged on one side of the top of the water tank, an ice maker used for making ice is arranged at one end of the guide pipe, the ice maker is fixedly installed on the back of the storage frame, and the collecting assembly comprises a collecting frame fixedly installed on the surface of the connecting plate; a water pump is fixedly installed on one side of the surface of the collecting frame, and a flow guide pipe is fixedly installed at the output end of the water pump.

The present application relates to the technical field of ventilation pipe, in particular to an assembled composite ventilation pipe for large factory building, which comprises a transverse ventilation pipe, an adapter pipe, a longitudinal ventilation pipe and a wall, a water collecting box is arranged at the bottom of the transverse ventilation pipe outside the wall, the water collecting box is used for collecting ice water from the inner wall of the longitudinal ventilation pipe to prevent the ice water from flowing back to the inside of the transverse ventilation pipe, a water guiding mechanism is movably arranged in the water collecting box, the water guiding mechanism supports the ice water during the water collecting stage and releases the ice water when the liquid level in the water collecting box reaches a preset weight. The melted ice water is collected by the water collecting box, which prevents the ice water from staying in the transverse ventilation pipe and affecting the exhaust. Moreover, the gravity of the collected ice water drives the water guiding plate and the adjusting plate to move downward synchronously, and the guide plate rotates outward to guide the hot air flow to blow against the inner wall of the longitudinal ventilation pipe, which improves the ice melting effect and increases the pressure in the transverse ventilation pipe to improve the discharge speed of the ice water on the water guiding plate.

The ice-making water storage barrel comprises a water barrel body, a refrigeration compressor, a cold water tower, an expansion valve and a capillary tube, the water barrel body comprises an outer water barrel and an inner water barrel, the inner water barrel is located in the outer water barrel, a refrigeration pipe is located between the outer water barrel and the inner water barrel, a water inlet bin is arranged on the inner water barrel, and a water outlet bin is arranged on the outer water barrel. A plurality of first through holes are formed in the water inlet bin and communicated with the outer water bucket and the inner water bucket, an air bag is arranged in the water inlet bin and connected with an air inlet pump and an air extracting pump of the outer water bucket, and the refrigeration compressor can make ice from water in the water bucket body through the condenser, the expansion valve and the capillary tube. In the ice making process, the air bag is filled with air, the first pass is closed, when ice making is stopped, the air bag discharges air to flow out of the first pass, ice melts and enters the inner water bucket, water in the inner water bucket is cooled, the structure can prolong the refrigeration time and improve the refrigeration efficiency, and the operation mode of ice making is simple.

The invention discloses an opencast coal mine coal spontaneous combustion incubation period prediction method suitable for a negative temperature condition, and relates to the technical field of coal spontaneous combustion prediction. The method comprises the following steps: firstly, carrying out an oxygen adsorption dynamic experiment on a to-be-detected coal sample at a constant temperature of-20 to 100 DEG C to obtain a low-temperature oxygen adsorption rate constant and establishing a function relationship between the low-temperature oxygen adsorption rate constant and the temperature; secondly, calculating ice melting latent heat according to the ice content in the coal sample to be detected, and introducing the ice melting latent heat as a key energy loss item into the heat-mass transfer model of the coal pile; further, establishing a coal pile energy balance equation comprehensively considering oxidation heat release, ice melting latent heat consumption and a heat dissipation process; and finally, solving the equation through a numerical method, and calculating the time required by the coal pile from the initial negative temperature rise to the critical spontaneous combustion temperature so as to obtain the accurate coal spontaneous combustion latency. The method is particularly suitable for mines in cold regions, surface mines and winter coal storage yards.

The invention discloses a micro-terrain power transmission line ice melting calculation method considering solar radiation, relates to the technical field of electric engineering power transmission, and solves the problem that a natural heat source of solar radiation cannot be fully considered and accurately utilized when the ice melting problem of a power transmission line is evaluated in the prior art. View field analysis, a shielding coefficient and a line posture correction coefficient are introduced, the actual solar radiation amount received by the power transmission line in the complex mountain area micro-terrain environment is calculated, resource waste or potential safety hazards caused by evaluation deviation are avoided, and the ice coating ablation accuracy is improved by accurately quantifying the ablation effect of the solar radiation on the ice coating. A natural ice melting strategy is provided for operation and maintenance of a power grid, so that dependence on a high-energy-consumption active ice melting technology is reduced, and economical efficiency of ice melting of the power transmission line is improved. In addition, the method can generate a temperature space distribution diagram along the direction of the line, and provides high-precision scientific guidance for routing inspection of the power transmission line, making of an ice melting strategy, planning and design of the line and safe operation and maintenance.

The application discloses a control method of a power distribution line ice melting device, which adopts the power distribution line ice melting device to melt ice, and the ice melting device comprises a parallel side converter, a series side converter, an energy storage capacitor, a parallel side transformer and a series side transformer, the energy storage capacitor is connected between the parallel side converter and the series side converter, the parallel side converter is a three-phase converter, absorbs active power of a fundamental frequency from the power distribution network through the parallel side transformer, the series side converter is a single-phase converter, generates non-fundamental wave current, and injects the non-fundamental wave current into a first end of a line to be melted through a neutral point of the series side transformer to generate Joule heat in the line to be melted to melt ice without power-off operation. Compared with the traditional method, the application can effectively reduce the interference on the power grid, reduce the ice melting cost, and improve the stability and reliability of the system.

The invention provides a power distribution network power supply recovery method considering node importance and recovery dependence. The method comprises the following steps: 1) obtaining fault information of a power distribution network in real time; 2) comprehensively evaluating the importance weight of each node by adopting a comprehensive weight method combining an analytic hierarchy process and an entropy weight method; 3) using a reverse breadth-first search algorithm from the fault points to identify a repair dependency relationship among the fault points, and determining an upstream fault set which needs to be repaired firstly when any fault point is repaired; 4) quantifying the reduction amount of the ice melting device deployed before the disaster on the fault recovery time, and correcting the fault recovery time of each fault point in the fault set; 5) constructing a repair sequence optimization model with the goal of minimizing the total weighted load loss amount; 6) solving the repair sequence optimization model by the scheduling control center by adopting an improved genetic algorithm, and generating an optimal sequence for fault repair; and 7) dynamically adjusting the optimal sequence of fault repair.

The invention relates to the technical field of power system safety protection, and particularly provides a power grid transmission line ice melting thickness prediction method and device based on numerical simulation. Comprising the following steps: substituting numerical values of ice melting influence parameters of the power grid transmission line into a pre-constructed convective heat transfer coefficient calculation formula, and calculating a convective heat transfer coefficient of the power grid transmission line; determining the ice melting thickness of the power grid power transmission line based on the convective heat transfer coefficient of the power grid power transmission line; wherein the pre-constructed convective heat transfer coefficient calculation formula is obtained in a numerical simulation mode. According to the technical scheme provided by the invention, quantitative and accurate prediction of the ice melting thickness under the dynamic meteorological condition can be realized.

The invention relates to an on-line ice preventing / melting method for a railway overhead line system powered by a star-delta transformer. The method comprises the following steps that the star-delta transformer is transformed; calculating corresponding required phase differences under different ice melting current values; the phase difference is used for judging the required transformer ice melting gear K at the moment; selecting a proper number of windings according to the K value in the third step; adjusting the number of turns of the corresponding winding of the transformer according to the winding turn value in the fourth step; and switching on the isolation switch of the partition post to melt ice. The method has the beneficial effects that the phase shifting function of the adjusted transformer is utilized, so that the traction power supply system forms circulating current to melt ice, normal operation of a train in extremely cold weather such as freezing rain is ensured, and large-area train shutdown caused by icing of a contact network is avoided.

The invention relates to the field of power grid maintenance, in particular to a wind power current collection line ice melting device and an ice melting method thereof. The device comprises a mechanical active deicing mechanism and a movable ice melting mechanism, the movable ice melting mechanism is arranged on one cable of a wind power current collection circuit, at least two wind-resistant mechanisms are arranged on the movable ice melting mechanism through a rotating elevator, and each wind-resistant mechanism comprises a rotating assembly, a telescopic assembly and a limiting assembly. The limiting assembly is arranged on the adjacent cables, the limiting assembly is connected with one end of the telescopic assembly, the telescopic assembly is installed on the rotating assembly, meanwhile, the invention discloses an ice melting method based on the device, the movable ice melting mechanism is provided with the two wind-resistant mechanisms through the rotating elevator, and the two wind-resistant mechanisms are connected with the other two cables; and the wind resistance is improved. And meanwhile, the position of the movable ice melting mechanism is replaced through the two wind-resistant mechanisms and the rotary elevator.

The invention is suitable for the technical field of direct-current ice melting, and discloses a direct-current ice melting control method, system, equipment and medium for a hybrid MMC of various lines of a transformer substation, and the method comprises the steps: obtaining an ice melting request of an outgoing line, comparing the sum of ice melting current target values of all lines with the maximum output capability of a full-bridge and half-bridge hybrid MMC direct-current ice melting system, generating an ice melting time sequence strategy; based on the ice melting request, the system is controlled to be switched from a reactive compensation mode to a direct current ice melting operation mode, direct current side voltage and current return-to-zero control is started, then the direct current reference value return-to-zero control is quitted, and ice melting is carried out on the current line; if a fault point is detected in the ice melting process, direct current side fault ride-through is executed; and if the line to be de-iced still exists, restarting the direct current reference value return-to-zero control to de-ice until no line to be de-iced exists, and switching to a reactive compensation mode. Automatic sorting and start-stop when the plurality of outgoing lines need to be de-iced are realized, and safe and stable operation of a power distribution network is ensured.

The application discloses a kind of electric testing grounding ring loosening fault monitoring method and system, specifically related to overhead line hardware mechanical connection state monitoring technical field, to solve the problem that existing method is difficult to identify early fretting wear of electric testing grounding ring connection interface from environmental interference under icing and ice melting alternating conditions;By obtaining the temperature signal and strain signal at the connection interface of aluminum wire clamp and copper grounding body, the temperature slowly varying trend component, strain slowly varying trend component and strain high frequency component are obtained by empirical mode decomposition, a temperature-strain hysteresis curve is constructed based on the temperature slowly varying trend component and strain slowly varying trend component, and the envelope area is calculated, when the envelope area is greater than the preset reference area, the rising edge steepness of local peak points in each segment of strain high frequency component and the signal energy ratio of the front and rear time periods are extracted to form statistical distribution characteristics, and the statistical distribution characteristics are matched with the pre-stored stick-slip characteristic template to determine whether fretting wear occurs at the connection interface.

The utility model relates to the technical field of snow melting devices, and discloses a snow melting device for a road, which comprises a frame body fixedly mounted on one side of a tractor; one side of the frame body is fixedly connected with a side plate; an ice melting hopper is hinged to one side of the side plate, an electric heating pipe is fixedly installed in the ice melting hopper, and the ice melting hopper is electrically connected with a diesel generator fixedly installed on the ice melting hopper. When the ice melting device is used, water is filled into the ice melting hopper, the diesel generator on one side of the ice melting hopper is started, the electric heating pipe is powered on, water in the electric heating pipe is heated, then the ice melting hopper is pulled through the tractor, continuous heat transfer ice melting operation can be conducted on an ice layer on the road surface, damage to the road surface is reduced, and the snow melting cost is reduced; the ice melting bucket and the side plate can be integrally disassembled only by screwing the first threaded rod, driving the moving block to move downwards and pushing the connecting plate, so that the sliding block moves downwards along with the connecting plate until the sliding block moves out of the base body, and the ice melting bucket and the side plate are conveniently and quickly disassembled.

The utility model discloses a blood specimen transport case which comprises a storage rack, a containing space used for containing blood specimen test tubes is arranged on the storage rack, and the storage rack is made of heat conduction materials. The low-temperature channel is used for containing ice blocks, the ice blocks are arranged below the storage rack, the low-temperature channel has a gradient and is provided with an outlet, one side of the low-temperature channel is provided with a heat preservation space for containing liquid water, and when part of the ice blocks are melted into the liquid water, the liquid water flows into the heat preservation space from the outlet along the gradient; the inlet is used for supplementing ice blocks into the low-temperature channel. According to the blood specimen transport case provided by the utility model, the condition of solid-liquid mixing can be avoided, so that the duration of ice cubes is prolonged, and the low-temperature maintaining time of the blood specimen transport case can be prolonged.

An anti-pollution flashover type sleeve belongs to the technical field of sleeves for transformer substations and comprises an upper-end metal accessory, an upper-end cement adhesive layer, a porcelain piece and a semiconductor glaze layer. A plurality of first umbrellas are integrally arranged above the outer side of the porcelain piece, and a plurality of second umbrellas are integrally arranged below the outer side of The surface of the first umbrella is provided with a semiconductor glaze layer. The surface of the second umbrella is provided with an electric porcelain glaze layer. The first umbrella with a large diameter is arranged to be an umbrella with a larger diameter, so that the rain-proof and icing-proof capabilities of the sleeve can be improved; and meanwhile, the creepage distance and the large umbrella surface area are increased, and the specific capacitance of the first umbrella porcelain surface is reduced, so that the gliding lightning voltage of the sleeve is improved. The semiconductor glaze is applied to improve the electric field distribution around the high-voltage metal accessory at the upper end, so that the discharge is not easy to develop, and the flashover voltage and the corona initial voltage are improved. The surface temperature of the porcelain is increased by 1-5 DEG C higher than the ambient temperature, so that a dirt layer absorbing moisture and dust can be dried, ice melting is promoted, ice flashover is prevented, and the purpose of pollution flashover prevention is achieved.

The application discloses a low-temperature water production method of an air water generator. When the ambient temperature is low, the water contained in the airflow is actively controlled to freeze on a condenser, so that the water in the air is collected. When the amount of ice in the condenser reaches a set range, the compressor is turned off, and the condenser no longer has a refrigeration effect. At this time, the air inhaled from the external environment is used to exchange heat with the ice in the condenser, so that the technical purpose of accelerating ice melting is achieved. Thus, the technical purpose of using the existing air water generator to produce water in a low-temperature environment is achieved. Without changing the hardware structure of the existing air water generator, the use temperature range of the air water generator can be extended to a low-temperature environment of 0-15 DEG C. Not only is the use temperature range of the air water generator expanded, but also the use geographical range of the air water generator is expanded.

According to the ice-melting distribution transformer, an ice-melting distribution box is integrally arranged on the outer side of a transformer oil tank, a permanent magnet mechanism voltage regulating switch is connected with a low-voltage coil, ice-melting low-voltage output corresponding to a coil assembly is led out through the ice-melting distribution box, and the low-voltage coil comprises a plurality of low-voltage coil sections; comprising a section of low-voltage common coil and a plurality of sections of low-voltage ice melting coils, the permanent magnet mechanism voltage regulating switch comprises a switch assembly corresponding to each phase electricity, the switch assembly comprises a plurality of voltage regulating switches corresponding to a plurality of low-voltage coil sections corresponding to the phase electricity one by one, and the plurality of voltage regulating switches are connected to the plurality of low-voltage coil sections in a one-to-one correspondence mode. The low-voltage shared coil supplies power to the power distribution load and / or the ice melting load under the corresponding phase power, and the low-voltage ice melting coil supplies power to the ice melting load under the corresponding phase power. By sharing part of the low-voltage coils, resource loss is avoided, the ice melting distribution box and the transformer mailbox are integrally designed, the area space is saved, and the cost is reduced.

The utility model relates to a double-scissor type lifting mechanism in the technical field of ice melting lifting equipment, which comprises a scissor lifting platform, the scissor lifting platform is arranged on bases, the bases are symmetrically arranged, the bases are connected through a mounting frame, a plurality of moving wheels are arranged on the bases, and the plurality of moving wheels are connected with a retractable structure. The two shear fork lifting tables support the two ice melting devices respectively, the two ice melting devices work on the power transmission lines at different heights, efficiency is improved, the multiple moving wheels arranged on the two bases can conveniently convey the whole device to the position below the line needing ice melting, before the ice melting devices are lifted, the moving wheels are folded through the folding and unfolding structure, and the ice melting efficiency is improved. And the moving wheels are prevented from shaking in the lifting process.

This utility model discloses an online monitoring device for ice and ice melting of conductors (ground wires), belonging to the field of online monitoring technology for ice and ice melting of conductors (ground wires). It includes a base housing, with a support shaft installed at one end of the base housing and a roof-shaped shell installed at the other end of the support shaft. This utility model, through the setup of the base housing, roof-shaped shell, high-precision tilt sensor, anti-icing camera, air temperature and humidity sensor, and signal transmitter, observes the entire icing process using lighting fixtures at both ends of the roof-shaped shell combined with the anti-icing camera positioned opposite each other. The air temperature and humidity sensor monitors the external air conditions in real time. When the monitored conductor is icy and tilted, the high-precision tilt sensor can promptly detect and provide feedback. Simultaneously, the detected information is transmitted to the base station via the signal transmitter to facilitate maintenance and repair work, improving the real-time information transmission efficiency of the device.

The invention provides an ice melting system and method, and relates to the technical field of food production. The ice melting system comprises an ice melting tank used for receiving and mixing ice block-shaped materials and liquid materials; the circulating system comprises a circulating pump, a heating device and a circulating pipeline, and the circulating pump conveys the liquid material in the ice melting tank to the heating device for heating and then returns to the ice melting tank; and the discharging system is connected to the ice melting tank and is used for discharging the liquid material in the ice melting tank. The ice melting method adopts the ice melting system and comprises the following steps: adding a liquid material into the ice melting tank to a first preset liquid level, starting the circulating pump and the heating device, and heating the liquid material to a preset temperature; and the ice block-shaped material is continuously added into the ice melting tank, and when the liquid-state material in the ice melting tank reaches a second preset liquid level and reaches a preset temperature, a discharging system is started to discharge the liquid-state material in the ice melting tank. The ice melting device can improve the ice melting efficiency of ice block-shaped materials.

The utility model provides an insulator deicing system based on a wireless power transmission technology, and relates to the technical field of wireless power transmission and disaster prevention and reduction of power transmission lines. The system is constructed by adopting a multi-stage WPT transmission technology based on a domino coil; comprising a primary side energy transmitting module, a first secondary side energy receiving and ice melting module, a second secondary side energy receiving and ice melting module, a third secondary side energy receiving and ice melting module and a fourth secondary side energy receiving and ice melting module which work under the same resonant frequency and are sequentially arranged in the energy transmission direction. Wherein the primary side energy transmitting module comprises a primary side power supply circuit, a transmitting coil circuit and a maximum power point tracking closed-loop control circuit. And all the secondary side energy receiving and ice melting modules comprise receiving coil circuits and switching circuits connected in series with the output ends of the receiving coil circuits. The system has the advantages of being high in energy transmission efficiency, high in energy utilization rate, high in system stability and capable of adapting to complex application environments.

The invention relates to a building block type ice melting device active current sharing system and a control method, and the system comprises a plurality of ice melting rectification devices which are connected in parallel to a to-be-ice-melted line, and a bidirectional Buck-Boost current sharing module is connected in series between the DC output end of each ice melting rectification device and the to-be-ice-melted line; and the current sharing controller is used for collecting the output voltage value and the output current value of each ice-melting rectifying device in real time, judging whether the plurality of ice-melting rectifying devices share the current or not, calculating the current sharing control quantity and generating a compensation voltage instruction when the plurality of ice-melting rectifying devices do not share the current, and adjusting the corresponding bidirectional Buck-Boost current sharing module through the compensation voltage instruction, so that the plurality of ice-melting rectifying devices realize the current sharing. High-precision current sharing and effective circulating current suppression can be realized under the condition of not changing the structure of the existing main circuit, and the circuit is suitable for a large-capacity and multi-machine parallel mobile ice melting equipment scene and has a remarkable engineering application value.

The invention discloses a device and a method for improving the microwave mining efficiency of moon water ice, and belongs to the technical field of in-situ mining of extraterrestrial water ice. The device comprises a multifunctional drilling unit, an air pressure reconstruction unit, a multifunctional heating unit and a moisture collection and storage unit, the multifunctional drilling unit is used for drilling frozen lunar soil, and the multifunctional drilling unit is further used for providing a sealed environment for the frozen lunar soil extracted through drilling; the air pressure reconstruction unit is used for setting a pressure environment for frozen lunar soil in the multifunctional drilling unit according to preset requirements; the multifunctional heating unit is used for heating the frozen lunar soil in the multifunctional drilling unit in a pressure environment set by the air pressure reconstruction unit, so that the frozen lunar soil in the multifunctional drilling unit generates liquid water, and ice in the frozen lunar soil is melted and vaporized by taking the liquid water as a microwave absorption and heat conduction carrier; and the water collection and storage unit is used for collecting and storing water vapor generated by melting and vaporizing ice in the frozen lunar soil in the multifunctional drilling unit.

The application discloses a kind of based on wide load voltage regulation variable ultra-high voltage ground wire ice-melting control method and system, comprising the following steps: S1.Based on wire type and infrared temperature measurement, obtain and calculate OPGW initial parameter;S2.According to OPGW initial parameter, calculate ice-melting current;S3.Introduce real-time wind speed, ice-melting current is corrected by introducing ice-melting form, line type as constraint condition, obtain optimal ice-melting current;S4.Based on optimal ice-melting current, dynamic voltage regulation and dynamic adjustment ice-melting current, complete line ice-melting.The method of the application is safe controllable, dynamic optimization and efficient operation to ultra-high voltage OPGW ice-melting process, provides new technical path and equipment foundation for power grid winter anti-icing power protection.