73results about How to "Guaranteed power supply capacity" patented technology

The invention provides a coal mill control method and system. The coal mill control method comprises the steps of: when receiving a load increasing command, obtaining an output value of the current coal mill unit, a coal quantity change rate and a number of pre-increased coal mills; calculating an output change value according to the coal quantity change rate and the starting time of the coal mills; calculating a difference value of a higher theoretical output limit of the current coal mill unit and the output change value, determining a first higher output limit of the current coal mill unitaccording to the difference value; adding a lower theoretical output limit of the current coal mill unit with a lower theoretical output limit of the pre-increased coal mills to obtain a first lower output limit of the current coal mill unit; selecting any value from a numerical value interval formed from the first upper output value and the first lower output limit as a starting output value; and starting the coal mills when the output value of the current coal mill unit reaches the starting output value so as to avoid breakpoints in a process of changing a load and ensure the generated power output.

The invention discloses a power supply for a solar power supply wireless sensor network node and a power supply method. The power supply battery comprises a control module, a rechargeable battery controlled by the control module, a solar battery panel, an illumination sensor and a wireless communication module connected with the control module, a voltage / current detection circuit, and a terminal computer in bidirectional communication with the control module. The power supply method comprises the following steps of: inputting a preset value by the terminal computer, storing the preset value in an electrically erasable programmable read-only memory (EEPROM), reading Vflag in the EEPROM, and judging whether the Vflag is equal to 1; when the Vflag is equal to 1, entering a charging mode; and when the Vflag is equal to 0, correspondingly adjusting the sampling period according to the output voltage value of the rechargeable battery periodically detected by the voltage / current detection circuit. The power supply has reasonable design, low cost, low power consumption and reliable working performance, and ensures that the power supply battery can provide as long working time as possible for the wireless sensor node in different states.

The invention relates to an intelligent network video monitoring and security and protection management platform linkage system, and the system mainly comprises front-end equipment, transmission equipment, storage control equipment, and display equipment. The system employs an optical fiber to achieve the transmission of a digital video signal, has technical advantages: remote transmission, high transmission speed, and stable signals, and achieves the linkage with an alarm system, an entrance guard system, and a fire extinguishing system. The system is good in integration, facilitates the management, is not liable to cause image loss, and brings convenience to a security guard on duty at a monitoring center or a worker at the management department for timely knowing the practical condition of a site. The system achieves the arrangement of all platform ports, and extends an access client according to the needs.

The invention provides an online rapid detection device of an open-circuit battery in a storage battery pack. The storage battery pack comprises a plurality of single batteries connected to positive and negative poles of a battery charger in series and comprises a bottom layer sampling and measuring unit, a bottom layer power circuit unit, an open-circuit testing and protection unit, a bottom layer power control unit, an upper-layer operating system and application unit and an internal resistance / electric conductance testing unit. The bottom layer sampling and measuring unit and the open-circuit testing and protection unit are respectively connected to the positive and negative poles of a certain single battery, the open-circuit testing and protection unit is further connected with the bottom layer power circuit unit, both the bottom layer sampling and measuring unit and the bottom layer power circuit unit are sequentially connected to the upper-layer operating system and application unit and the internal resistance / electric conductance testing unit through the bottom layer power control unit. The online rapid detection device combines with an existing storage battery internal resistance tester, can accurately and rapidly find the open-circuit battery through online discharging of the single batteries and meanwhile does not harm testers and testing instruments and meters.

The invention discloses a power supply method and first electronic equipment. The power supply method comprises the following steps: obtaining the power supply priority of a first input interface of the first electronic equipment as a first priority, and obtaining the power supply priority of a second input interface as a second priority; when a detection result shows that the second electronic equipment is connected to the first electronic equipment through the first input interface, controlling a first power supply access which at least comprises the second electronic equipment and the first input interface to be under a condition state so as to supply power to the first electronic equipment; and when a detection result shows that third electronic equipment is connected to the first electronic equipment through the second input interface and the second priority is higher than the first priority, controlling the first power supply access to be regulated to a disconnection state from the conduction state at a first moment, and controlling a second power supply access which at least comprises the third electronic equipment and the second input interface to be under the conduction state at the first moment so as to supply power to the first electronic equipment.

The invention provides an intelligent distribution network self-healing control method based on a fault-tolerant thought. According to the intelligent distribution network self-healing control method, an association relationship between the effect expressed in a system of each set of equipment in an actual distribution network and the equipment is analyzed, and an operation state of the distribution network is combined to divide the distribution network into a current function resource which is operated at present, a redundant resource capable of being called and a path unit, so that a distribution network resource structure network model is established; when the operation of the distribution network is in an early warning state, the redundant resource needs to be put into operation; once if the redundant resource slips off to an emergency state or a critical state, the system rapidly controls the path unit, and the redundant resource is accessed into the distribution network, so that the operation state of a power grid is improved and the power grid is prevented from being worsened and entering a fault state; and a distribution network resource structure is flexibly converted, and then foundations are provided for fault-tolerant control of the distribution network, so that the reliability of the distribution network is effectively improved and the emergency capability is enhanced.

The invention discloses a power grid investment distribution and decision-making method and system based on power distribution network comprehensive evaluation, and the method comprises the followingsteps: S1, constructing a county power distribution network comprehensive evaluation system, determining evaluation indexes, calculating the weights of the indexes, and calculating the scores of the evaluation indexes; S2, constructing a power grid investment distribution model for investment distribution; wherein S2 specifically comprises the steps of establishing a power distribution network investment allocation decision model of the system on the premise of considering county scale, load increase, power supply capability, economic benefit and social benefit of investment, allocating totalcapital of power distribution network construction and reconstruction to each county, and finally, taking risk factors and allocation fairness as optimization objectives, and optimizing the generatedpower distribution network investment and decision-making model to obtain an optimal decision model. The optimal combination of power grid investment projects is obtained by evaluating the investmentarea and introducing the capital constraint conditions according to the necessary factors of the power grid construction comprehensive level, and decision-making support is provided for power distribution network construction investment capital distribution.

Provided is a cabinet safe monitoring method and system in the modern logistics industry. The method comprises (1) setting a black box on each cabinet to automatically record cabinet opening and closing information in a transfer process and opening information of the black box; (2) the back box being composed of a signal generator installed at a door and a host installed on a casing; and (3) when a client queries the safety of goods in the cabinet, decoding the information automatically recorded by the black box through data packets to restore the information be original opening and closing information and opening information of the black box, and comparing with legal opening and closing recoding and opening recording to determine occurrence of illegal closing and opening and opening events. Monitoring modes include (1) a black box, client and service terminal three-level mode; (2) a black box and client two-level mode; and (3) a black box and service terminal two-level mode. The system can automatically record safety information such as opening and closing, is completely transparent to container operation personnel, allows clients to employ a general upper computer to obtain recorded data, has the characteristics of safe and reliable operation and low energy consumption, and is especially suitable for freight container transfer work.

The present invention discloses a device for testing accumulator on line which comprises of monomer measuring module, CPU control module and power supply module. CPU control module controls monomer measuring module and power supply module and transfers measuring result and power supply module information to CPU control module to store and process, wherein, a constant current module parallel connected to power supply module to make the current output from power supply module and constant current module is invariableness. The structure of present invention saves electricity without adding heating load in discharging process, realizes grouping on line constant current discharging and measuring capacity of accumulator efficiently and safely.

The invention discloses a wireless charging method and device of a network camera, which are mainly formed by a wireless charging transmitting end and a wireless charging receiving end, and can control the charging state and the charging speed according to the electric quantity and the charging characteristic of a battery in the network camera. The scheme can enable the webcam to charge the internal power storage device in a wireless charging mode, guarantee its power supply ability, let the webcam leave the bondage of the electric wire completely, make the user can put the webcam in any position and any angle, achieve a kind of mobile monitoring function of any time, greatly increase the mobility and expansibility of the product, and promote the user's experience.

Disclosed is an axial-flow type thermoelectric device. A turbo type burner, a heat exchanger and a motor are adopted, a power generator is driven to be started by means of rotation of a turbine of the burner, and hot air of the burner pushes an axial power turbine in the power double-layer heat exchanger to drive the power generator. Water jackets are arranged outside the burner, a flame chute and a volute casing and on the heat exchanger and connected with a radiator to provide a heating source. Auxiliary power is provided for the power turbine besides the action of the hot air of the turbo type burner, and the utilization rate of energy is increased. The axial-flow type thermoelectric device can be used in small or confined space to serve as a heating and power generation device in a tank or armored car and the like and can also serve as a power generation and heating device independently for outdoor camping and on an island or frontier sentry and the like. The axial-flow type thermoelectric device is simple in structure and low in production cost and has promotional value.

The invention discloses a micro-fuel co-generation device. By adopting a turbine type burner, a power turbine and an electric motor and using the self-rotation of a burner turbine, a starting generator and a burner hot air driving power turbine drive a generator to provide power source; water sleeves arranged at outsides of a combustor, a flame guide pipe and a volute are connected with a radiator for providing the heating source; a water / gas outlet of each of the water sleeves is interconnected with a gas collecting cylinder, and a nozzle of the gas collecting cylinder is arranged at a tangential angle of a blade of the power turbine; except for the hot air function of the turbine type burner, an assistant power is further provided for the power turbine, double mediums of the hot air and the hot steam are commonly acted on the power turbine to improve the utilization rate of the energy source. The micro-fuel co-generation device can be applied to a relatively narrow or sealed space, such as a warming generating device in a tank or an armored car; the device also can be used as power generating and heating devices at field camp, islands, frontier sentry and the like; when a variable jet nozzle direction is adjusted to vertically upward direction, the device can be applied to kitchen work. Moreover, the micro-fuel co-generation device is simple in structure, low in production cost, and worthy of popularizing.

The invention provides atomizing, humidifying and dust suppression equipment for environmental engineering site construction. The atomizing, humidifying and dust suppression equipment for environmental engineering site construction comprises a power supply connecting head and a fan; a lithium battery is mounted at the bottom of a pedestal; a power supply plug is arranged at the bottom of the lithium battery; the power supply plug is connected with a water pump control switch and a fan control switch separately through a power supply main jack; the water pump control switch is mounted on the outer end surface of the pedestal; the water pump control switch is electrically connected with a small high-pressure pump through a power line; the fan control switch is mounted on the outer end surface of the pedestal; the small high-pressure pump is fixed on the outer end surface of the pedestal; the small high-pressure pump is communicated with a water supply pipeline; water flow stored in the equipment is atomized, the atomized water drops are sprayed in a construction area at the front end of the equipment slantways, soil in the construction area is humidified, and the influence on the ambient air quality by raise dust generated by the fact that the soil in the dry state is influenced by the external air flow is avoided.

The invention relates to a site selection constant-volume method and system for a w-voltage line voltage regulator. The method comprises: a low-voltage demarcation point and a distribution transformer of a target distribution network are identified to obtain a demarcation point distance between the low-voltage demarcation point and the distribution transformer; a line load type of the target distribution network is identified and a load increasing promotion coefficient of the target distribution network is set according to the line load type; on the basis of the demarcation point distance and the load increasing promotion coefficient, a mounting point distance of a low-voltage line voltage regulator is determined, and a mounting site of the low-voltage line voltage regulator is selected at a circumference by using the distribution transformer as a center of circle and the mounting point distance as a radius; and load nodes beyond the circumference by using the distribution transformer as the center of circle and the mounting point distance as the radius are identified to obtain a first selected load node, a total load capacity corresponding to the first selected load node is obtained, and a configuration capacity of the low-voltage line voltage regulator is determined based on the total load capacity and the load increasing promotion coefficient.

The invention discloses an air conditioner control method and system of an intermittent power supply railway vehicle. An air conditioner is controlled to be in a pre-working mode, a normal working mode and an energy-saving working mode under different conditions; in the pre-working mode, by setting and reaching a new target temperature, energy storage is achieved to the maximum extent during charging so as to maintain a comfort degree of a vehicle during subsequent operation, meanwhile, energy consumption of the air conditioner when the vehicle is not charged is reduced, and a capacity of an energy storage power supply for continuously providing necessary power for traction, braking and other key systems is prolonged; and according to available electric energy and different set thresholds,the air conditioner is in different energy-saving working modes, the necessary power supply capacity of the vehicle is further guaranteed, and meanwhile the comfort degree of passengers is guaranteed.

The invention provides an optimal breaking switch optimization method and system, and the method comprises the following steps during optimization: screening an operable main switch set, and enumerating out all switch combination states of the operable main switch set in parallel; according to the switch combination state of each operable main switch set, carrying out recombination topology on themain analysis distribution line and the corresponding contact line, and removing invalid operation modes after the recombination topology to obtain a new distribution line operation mode; calculatingtheoretical line loss values of the main analysis distribution line and the corresponding contact line after the topology recombination based on the new distribution line operation mode; and screening out a theoretical line loss minimum value, and setting a new distribution line operation mode corresponding to the theoretical line loss minimum value as an optimal operation mode. According to theinvention, the economic operation capability of the distribution network is improved, the line loss rate is reduced, the power grid operates more economically, and the purposes of loss reduction and energy conservation are achieved.

The invention discloses a method and system for detecting a battery backup unit. The method includes: cutting off the power supply of a power source through a complex programmable logic device; triggering the power supply of the battery backup unit; recovering the power supply of the power source through the complex programmable logic device after the power supply is cut off for a set time; calculating the discharge capacity of the battery backup unit in the set time, and judging whether the discharge capacity is in a standard range or not. By the arrangement, the method has the advantages that the battery backup unit which has a quality problem during the operation of a storage system can be detected by detecting the health state of the battery backup unit, and accordingly a client can be reminded to replace the battery backup unit as soon as possible, the power supply module of the storage system is perfected, the power supply ability of the storage system is guaranteed, the potential safety hazard of data loss is avoided, the safety operation of the storage system is guaranteed, and the reliability of the storage system is increased.

The invention relates to the technical field of transformers. The invention further discloses a transformer protection device based on the electromagnetic induction principle. The device comprises anouter box, the top of the outer box body is fixedly connected with a binding post; a ventilation opening is formed in the top of the side surface of the outer box body; an inner box body is fixedly connected to the interior of the outer box body; the outer portion of the inner box body is movably connected with a heat dissipation pipe; an oil pump is fixedly connected to the outer part of the heatdissipation pipe; a ventilating duct is formed in the inner box body; a fan is fixedly connected to the interior of the ventilating duct; a positioning rod is fixedly connected to the interior of theinner box body; through the cooperative use of the heat dissipation pipe, the oil pump, the ventilation duct and the draught fan, the heat dissipation effect of the transformer is effectively guaranteed, the heat dissipation mode of the transformer is increased, the working temperature of the transformer is guaranteed, the aging of transformer parts is avoided, the service life of the transformeris effectively prolonged, fire disasters caused by too high temperature are effectively avoided, and therefore, the safety of a circuit is protected.

The invention relates to a multifunctional cooking device, and the device comprises a housing, a control circuit board and an electromagnetic wire coil, wherein the control circuit board and the electromagnetic wire coil are located in the housing. The electromagnetic wire coil is electrically connected with the control circuit board, and the control circuit board comprises a pan detection unit and a heating control unit. The housing is provided with a panel which allows heat to pass. The panel is provided with an electric heating film which allows the magnetic field of the electromagnetic wire coil to pass, and the electric heating film is set to be corresponding to a heating region of the electromagnetic wire coil. The electric heating film is electrically connected with the control circuit board. The heating control unit sequentially controls the electric heating film and the electromagnetic wire coil to work independently through signals of the pan detection unit. Therefore, a user can place any type of pans on the device to cook food, thereby greatly improving the adaptability of an electromagnetic heating device, and changing the dependence of electromagnetic heating products on the pans.

The invention discloses a novel mechanical control circuit and mode of a frequency converter, and aims to solve the problem that a frequency converter in the prior art cannot achieve the mechanical control function by detecting the voltage of a direct-current bus. The novel mechanical control circuit comprises a power supply module and a compressor module, wherein the power supply module is connected with the compressor module to supply power to the compressor module, the power supply module comprises an external alternating-current power supply and a temperature control switch used for controlling the voltage of a direct-current bus, and the compressor module comprises a whole filter circuit, a switching power supply chip, a voltage sampling circuit, a main core, a driving and inverting circuit, a current sampling circuit, a charging circuit, a battery and temperature sampling circuit and a power supply module. According to the invention, an alternating current phase line is preventedfrom being additionally led out to serve as a control signal, a direct current bus voltage is converted into a high-low level signal which can be recognized by a single chip microcomputer through a series of voltage division and filtering, and a main core calculates the corresponding rotating speed according to the duty ratio of the signal and controls a compressor with the corresponding rotatingspeed as reference, so that the cost is reduced; and the problem of over-high cost caused by additionally arranging a battery and a charging circuit is solved.

The invention provides a modularized photovoltaic inverter control all-in-one machine comprising inverter modules, a central control module, a bypass external electric switch module and an outer shell. The machine is characterized by further comprising a rectification module and an upper computer communication module. The inverter modules and the rectification module are fixed at the bottom of the outer shell side by side through fixing bolts. The central control module and the upper computer communication module are fixed on the upper sides of the inverter modules and the upper side of the rectification module, the inverter modules and the central control module are correspondingly fixed, the rectification module and the upper computer communication module are fixed correspondingly, each inverter module comprises N inverter units, and N is larger than or equal to 1. A plurality of the small-capacity inverter modules are combined to take the place of a large-capacity inverter so as to improve convenience of transportation, installation and after-sale services and high supportability of inverter power supply. Meanwhile, reliability of the inverter power supply of a system is greatly improved, especially in an emergency, and the machine can at least guarantee power supply capacity of partial small-capacity inverter modules.

The application discloses a charging method, a charging device, a piece of terminal equipment and a computer readable storage medium. The charging method is applied to a piece of terminal equipment which includes a first battery and a second battery. The preset charging performance of the first battery is superior to that of the second battery. The charging method includes the following steps: acquiring first remaining power of the first battery when the terminal equipment is detected to be in a charging state; judging whether the first remaining power meets a preset power condition; and determining a charging strategy for the first battery and the second battery according to the preset power condition if the first remaining power meets the preset power condition. Through the application,the charging resources for charging multiple batteries can be reasonably allocated. The charging method and the charging device have strong usability and practicability.

The invention discloses a photothermal power generation system, which comprises an air compressor, a photothermal heat storage device, a photothermal air heat exchanger, an air expander and a generator. The air compressor, the air expander and the generator are coaxially connected. The heat medium pipe of the photothermal heat exchanger is connected with the heat storage medium circulation pipe ofthe photothermal heat storage device; an inlet of the cold medium pipe of the photothermal air heat exchanger and an exhaust port of the air compressor are connected, and an output port of the cold medium pipe is connected with an air inlet of the air expander; the air is pressurized by the air compressor for further heat exchange with the photothermal heat exchanger to form high temperature andhigh pressure air, which drives the operation of air expander and coaxial air compressor, and at the same time drives coaxial generator to generate electricity. The photothermal power generation system adopts a Breton cycle with air as a medium, which can greatly improve the power generation efficiency.

The invention relates to the technical field of engineering monitoring, in particular to a slope protection landslide monitoring method for civil engineering and a detection system and method. The system comprises a revetment, a data analysis center, a meteorological data module and a user early warning terminal. The power generation module driven by flowing water generates power by using rainwater, so that the power supply effect of the sensor is ensured, and wiring materials are saved; secondly, the stress sensor specially used for the slope protection is arranged, the material cost is low, the monitoring effect is good, and the slope protection can be deformed before landslide, so that the landslide can be well monitored only by monitoring the deformation condition of the slope protection; a meteorological data acquisition module is also arranged, so that a landslide risk coefficient and a rainwater coefficient of a meteorological center can be acquired in real time, and a calculation index is further provided for the landslide risk; and according to the method, the landslide risk coefficient is obtained through comprehensive calculation in combination with changes of meteorological data, humidity data and stress data for slope protection, pertinence is good, and practicability is high.

The invention relates to a line loss optimal segment point optimization design method and equipment considering space-time expansion. The method comprises the following steps: 1) obtaining basic machine account data of a power distribution network system to be optimized and operation data of power distribution network equipment in one year; 2) based on the basic standing book data, considering spatial expansion, and determining an analysis range of a to-be-optimized power distribution network system; 3) in the analysis range, based on the operation data of the power distribution network equipment in one year, time extension is considered, and optimal segmentation point optimization calculation is carried out; and 4) taking the optimal calculation result as the optimal segmented operation mode of the distribution line in the analysis range. Compared with the prior art, the method has the advantages of high reliability, high accuracy and the like.

The invention discloses a bilateral traction power supply double-tree-shaped external power supply backup power switch structure and a control method, external power supplies of two traction substations for tree-shaped bilateral power supply are obtained from the same bus of the same substation of a power grid, and when an incoming line of the external power supply of a railway traction substation breaks down and a relay protection device cuts off the incoming line, the external power supply is switched off. The automatic switching of the standby power supply needs to consider the linkage of two traction station incoming lines for forming bilateral power supply, and needs to consider the linkage with a partition station switch according to an external power supply incoming line structure. According to the utility model, the communication technology is utilized, information of two traction substation incoming lines and partition posts in a bilateral power supply system is collected at the same time, intelligent judgment of standby power supply switching is carried out, and the technical problem of standby power supply automatic switching of external power supply incoming lines of bilateral power supply traction substations can be solved. The automatic switching device is widely suitable for automatic switching of the standby power supply of the double-tree-shaped external power supply incoming line of the bilateral power supply electrified railway traction substation.