30results about How to "Solving Power Needs" patented technology

The invention discloses a distributed power system of an LNG power-driven vessel and a control method. The system comprises an LNG vaporization system, a cold energy power generation loop, a heat recovery loop and a lithium bromide absorption cooling/heating loop. Cold energy produced by the LNG vaporization system during operation of the LNG power-driven vessel is recycled for LNG cold energy power generation, power is used as an electricity source for the LNG power-driven vessel, and the vessel cabin power supply demands are met; vaporized LNG is fed into a vessel main engine system combustion chamber for combustion, and power is provided for the vessel; and lots of waste heat generated after combustion is recycled and used as a heat source of an air conditioning system and the vaporization system, and the demands of heating and cooling of vessel cabins and LNG vaporization are met. Cold generated during LNG vaporization and heat released during combustion are used as a cold source and the heat source of the distributed power system, the demands for electricity, cold, cool and heat of the vessel cabins are met, and lots of vessel system investment is saved; and meanwhile, the energy utilization efficiency is improved, resources are saved, and the environment protection effect is achieved.

The invention relates to a technology and device for achieving power generation through natural gas pressure energy and achieving cold energy recycling. A large amount of pressure energy is released in the process that a high-pressure pipe network supplies natural gas to a downstream pipe network. According to the technology and device, the pressure energy of the high-pressure natural gas is utilized for power generation, cold energy generated in the pressure reducing process is recycled, the economic benefits of enterprises are improved, the contamination problem brought by power generation of a power plant is avoided while power generation is achieved, and the requirements of energy saving and environment friendliness are met.

The invention relates to an alternating current and direct current power supply system with a grounded power supply end. In the scheme, the input end of a power electronic transformer is connected with a medium-high voltage power grid, and the output end of the power electronic transformer is connected with a low-voltage direct current bus; the input end of a low-voltage inverter DC/AC device is connected with the low-voltage direct-current bus, and the output end of the low-voltage inverter DC/AC device is connected with a low-voltage alternating-current load and grounded; and the input endsof non-isolated DC/DC devices are connected to the low-voltage direct-current bus in parallel, and the output ends of the non-isolated DC/DC devices are connected with a low-voltage direct-current load. According to the scheme, a three-phase four-wire or three-phase five-wire power supply mode is established at the alternating current and direct current power supply side, and the problem that a grounding wire system is lacked when a three-phase three-wire inverter supplies power is solved. In addition, a star connection capacitor is additionally arranged on the output side of the low-voltage inverter DC/AC device and is connected with the input sides of the non-isolated DC/DC devices to construct a low-impedance loop of a common-mode voltage, so that the common-mode voltage of the alternating current side to the direct current side can be effectively inhibited, and the problem that the power supply process is interfered due to overlarge common-mode voltage of the non-isolated alternating current/direct current power supply circuit is solved.

Disclosed is a common-mode voltage suppression system. The common-mode voltage suppression system is characterized in that the input end of a power electronic transformer in the system is connected with a medium-high-voltage power grid, while the output end of the power electronic transformer is connected with a low-voltage direct-current bus; the input end of a low-voltage inverter DC/AC device is connected with the low-voltage direct-current bus while the output end is connected with a low-voltage alternating-current load; the input end of a non-isolation type DC/DC device is connected to the low-voltage direct-current bus in parallel while the output end is connected with a low-voltage direct-current load separately; and the output side of the low-voltage inverter DC/AC device is connected with the input side of the non-isolation type DC/DC device to form a low-impedance loop of the common-mode voltage. According to the scheme, the low-impedance loop of the common-mode voltage is constructed at the output side of the low-voltage inverter DC/AC device and the input side of the non-isolation type DC/DC device, so that the direct current side to alternating current side common-modevoltage can be suppressed effectively, and the problem that a non-isolated alternating-current and direct-current power supply circuit is too high in common-mode voltage to interfere a power supply process is solved.

The invention discloses an electricity generating arch bridge with an automatic cleaning function. The electricity generating arch bridge with the automatic cleaning function comprises a bridge body and weighing scales arranged at the two ends of the bridge body, the weighing scales are electrically connected with a control panel, the control panel is electrically connected with a prompt device, and the weighing scales at the two ends are connected with a bridge surface; magnets and coils are arranged at the bottom of the bridge surface, the magnets are electrically connected with the coils and electrically connected with an accumulator, the accumulator is arranged on one side of the bridge body, and water pumps are arranged on the two sides of the bridge body correspondingly; electromagnetic valves are arranged on the water pumps, the electromagnetic valves are electrically connected with a timer, the electromagnetic valves and the timer are electrically connected with the control panel, and the control panel is electrically connected with the accumulator. According to the electricity generating arch bridge with the automatic cleaning function, the structure is simple, the magnets and a turbine generator are arranged on the bridge body, thus external renewable resources can be utilized effectively and transformed into kinetic energy, new energy is developed effectively, the energy is saved, and benefit maximization is achieved; and power demands, such as the power demands of the water pumps and a street lamp, of the periphery of the bridge body are met, use of the water pumps and the street lamp are automatically operated through an automatic control system, and manual operation is not needed.

The invention provides a shaft-end power generation system and a shaft-end power generation method for a rail wagon. The shaft-end power generation system comprises a hydraulic transmission system anda power supply system. The hydraulic transmission system comprises a constant displacement pump, a constant displacement motor and an oil supplementing pump. The power supply system comprises an asynchronous generator and a rectification inverter. The constant displacement motor, the asynchronous generator and the oil supplementing pump are connected through a coupler and are in coaxial transmission, wherein the coaxial transmission in both the positive direction and the negative direction can be achieved. The constant displacement pump is installed at the axle end of an axle of the railway wagon and powered by the axle end of the axle. The asynchronous generator and the oil supplementing pump are powered by the constant displacement motor. The rectification inverter is connected with theasynchronous generator. The rectification inverter rectifies and inverts the electricity generated by the asynchronous generator and outputs the electricity to a load. The limit requirement of the rail wagon is met. The constant displacement pump, the constant displacement motor, the oil supplementing pump and the asynchronous generator can work in a two-way rotating mode. The electric power provided in the forward direction is equal to that provided in the reverse direction.

The invention aims at providing a movable type power system of renewable energy, which is characterized by comprising a movable container vehicle unit, a perpendicular shaft wind power generator unit, a solar Sterling generator unit, a high-power energy storage unit, a pluggable battery collecting box unit and a power output/input unit. The perpendicular shaft wind power generator unit, the solar Sterling generator unit, the high-power energy storage unit, the pluggable battery collecting box unit and the power output/input unit are installed on the movable container vehicle unit. When the movable type power system of the renewable energy is moved, systems of the perpendicular shaft wind power generator unit and the solar Sterling generator unit are folded and dismantled to be installed on a fixing position of the movable container vehicle unit, and side doors of a container vehicle of the movable container vehicle unit are folded and are in a movable state. When the movable type power system of the renewable energy is operated, the side doors of the container vehicle of the movable container vehicle unit are put down and unfolded, and all systems of the perpendicular shaft wind power generator unit and the solar Sterling generator unit are installed in place, extend, and are in operating state.

The invention provides a real-time measuring device and method for an on-board residual ruler of a drilling machine. The device comprises a separated ultrasonic distance measurement module and a short-side distance measurement module, and the separated ultrasonic distance measurement module comprises an ultrasonic transmitting unit fixed at the top end of a driving drilling rod, and an ultrasonic receiving unit fixed on a support. The short-side distance measuring module is used for measuring the vertical distance between the ultrasonic receiving unit and a vertical shaft of the drilling machine; the short-side distance measuring module is an integrated ultrasonic distance measuring device, and the integrated ultrasonic distance measuring device and the ultrasonic receiving unit are fixed into a whole. According to the real-time measuring device, the drilling hole depth can be obtained in real time, the traditional inherent thought of directly detecting the hole depth is broken through, real-time measurement is achieved, and the drilling process can be completely recorded; and the ultrasonic distance measuring device is independent of the drilling machine, influence of vibration on the measuring device in the drilling process of the drilling machine is avoided, and distance measuring accuracy and equipment stability are guaranteed.

The invention relates to a method for black start of a generator in a gas power plant, in particular to a gas turbine black-start method based on small gas turbine as a black-start power supply. The method is characterized by comprising the following steps that: a set of black-start small gas turbine is provided, and a pressure regulating unit of the black-start small gas turbine is connected with a pre-processing system in a natural gas system of the gas power plant; the energy supply output end of the black-start small gas turbine is connected with a high-voltage plant bus section of the gas power plant; a security diesel generator is started to charge a low-voltage plant bus section, and then the black-start small gas turbine is started to charge the high-voltage plant bus section; further, the high-voltage plant bus section supplies energy to the low-voltage plant bus section, and the security diesel generator is shut down; and a main gas turbine is started, and then black start is completed through grid connection. The method has the advantages that the operation reliability is improved, the operation and maintenance are convenient, and the workload is small; the income of the power plant is increased, the sinking cost is greatly reduced, and the efficiency and economy of the black-start small gas turbine are improved.

The invention provides a circuit outputting 50Hz single-phase 220V and three-phase 380V high-power alternating currents at the same time on the basis of an IPM. Any phase and a center line are led out from three-phase four lines for obtaining the 50Hz single-phase 220V alternating currents. A center line of the output end is connected with neutral points (the connecting point C1 and the connecting point C2) in a 650V direct-current circuit through a fourth inductor L4. On one hand, the requirement for phase voltage deviation when loads are asymmetrical is met, and on the other hand, electromagnetic interference on a digital control circuit and external power utilization equipment from an IPM circuit is effectively restrained. According to the circuit, on one hand, the 50Hz single-phase 220V and three-phase 380V high-power alternating currents (single-phase 4kW and three-phase 12kW) can be output at the same time, and on the other hand, the quality of an output power source meets the requirement of the national army standard. The circuit can meet the power supply needs on the condition that single-phase equipment and three-phase equipment exist at the same time and on the condition without mains supply in the military and civilian fields, and has already been successfully applied to research and development of vehicle-mounted electricity-generating equipment of a certain type guided missile launching vehicle.

The invention relates to the technical field of connection terminals, in particular to a box-type combined total terminal box for a secondary line collection terminal of a 220kV novel composite apparatus. A semaphore collection terminal block, a partition plate, secondary line collection terminal blocks of a current transformer, a heater, a DC bus bar and DC air switch, AC bus bars, an AC air switch and a headlamp are arranged in a box body; and the box body is total terminal box formed by combining two parts of box bodies in which the same equipment is internally arranged. According to the box-type combined total terminal box, the semaphore of split-phase equipment is collected into the terminal box, so that the field construction workload is reduced, the technical difficulty of construction is lowered and the consumable materials are saved. Meanwhile, the box-type combined total terminal box has the beneficial effects that the box-type combined total terminal box has rainproof and moisture-proof functions, the temperature of the box body can be automatically adjusted and controlled, cable connection is facilitated, the field construction workload is reduced, the technical difficulty of construction is lowered and the consumable materials are saved. The power requirements of the split-phase equipment can be met, the power supply stability of an AC system is ensured, AC in a field region is designed according to loop network power supply, interval completion of an AC/DC loop network is facilitated and the power supply system is stable and reliable.

The embodiment of the invention provides a power supply cable and a power supply method thereof, relates to the technical field of power supply, and is used for solving the problem of how to meet the power supply requirement of a load end. The power supply cable comprises an input end and an output end; the electric signal threshold detection circuit is coupled with the input end and the output end and is used for detecting an electric signal between the input end and the output end, comparing the electric signal with a first threshold and outputting a comparison result; the control circuit is coupled with the electric signal threshold detection circuit and is used for outputting a first control signal according to the comparison result; the charging battery is used for auxiliary power supply; and the booster circuit is coupled with the charging battery and the control circuit and is used for controlling whether the voltage value of the electric signal output by the charging battery is increased to a first set value or not under the control of the first control signal and transmitting the voltage value to the output end.

The invention relates to a power supply method and a power supply circuit of a server. According to the method, when it is detected that an alternating-current power supply is triggered to be powered on, a logic controller is initialized, a first power module is started through the logic controller to provide electric energy for working equipment in the S5 state, and when it is detected that a network card is in place, a second power module is started through the logic controller to provide electric energy for the network card, and when the logic controller detects that the network card is not in place, the connection between the second power supply module and the network card is disconnected through the logic controller. According to the method, an optimized power supply scheme for supplying power to different devices in different states is achieved, the waste phenomenon that redundant electric energy is provided for the server when the network card is not in place or the server is in the S5 state is avoided, and the method for selecting the matched power supply modules to supply power according to the power supply requirements of the devices is achieved, and the problem that the existing power supply demand and power supply capacity are unbalanced is solved.

The invention provides a multifunctional outdoor portable power generator which comprises an energy selection module which connected with a thermoelectric generation module, a solar generating module and a voltage stabilization output module. The hot end of the thermoelectric generation module is connected with a heat absorption module, and the cold end of the thermoelectric generation module is connected with a heat radiation module. The energy selection module selects to control simultaneous power generating through the thermoelectric generation and the solar generating module or independent power generating through the thermoelectric generation and the solar generating module. The energy selection module outputs electric energy obtained by the thermoelectric generation module and the solar generating module through the voltage stabilization output module, and the voltage stabilization output module is further connected with an energy storage module. The multifunctional outdoor portable power generator selects and combines different energy to adapt outdoor weather conditions, is convenient and stable in function. The combination of all modules realizes charging, clothes drying and cooking functions. The multifunctional outdoor portable power generator satisfies a plurality of outdoor necessary needs.

The invention is suitable for the field of electronics and provides an external power supply identification circuit for large current touch equipment and an electronic signature screen. The circuit comprises a USB (universal serial bus) detection unit, a DC (direct current) detection unit, an identification control unit and a filtering unit, wherein the USB detection unit is used for generating a USB detection signal during external USB power supply; the DC detection unit is used for generating a DC detection signal and DC power supply voltage/current during external DC power supply; the identification control unit is used for outputting USB power supply voltage/current when the USB detection signal is only received and stopping outputting USB power supply voltage/current when the DC detection signal is received; the filtering unit is used for filtering USB power supply voltage/current or DC power supply voltage/current. The circuit has the beneficial effects that low current USB power supply is used without external power adapters; under the condition of insufficiency of USB power supply, power is supplied by the external power adapters, and meanwhile, a USB power supply circuit is blocked to prevent the current of the power adapters from flowing back to the USB, thus solving the problem of insufficiency of USB power supply.