42results about How to "Power flexible" patented technology

A power system flexibly distributes power among phased array antenna apertures of a satellite (or other type of platform). By allocating the power provided by a power source among the apertures, if one aperture is not providing useful coverage (due to orientation, light traffic volume, aperture operating frequency and / or polarization, etc.), power being supplied to that aperture may be reallocated to one or more other apertures that are providing useful coverage. To flexibly allocate power among the apertures, power amplifiers and attenuators associated with each antenna element are adjusted to provide a wide range of RF output powers with high efficiency at all output power levels. By increasing power allocation efficiency, the size of the satellite power source may be reduced while appropriate power is still provided.

The present invention provides a multi-terminal power conversion device, a multi-terminal power transfer device, and a power network system which allows an existing power grid to be divided into a plurality of power grids that can be interconnected together and operated stably via existing or new transmission lines. An inter-power grid asynchronous interconnection network system includes a multi-terminal power conversion device characterized by connecting together a plurality of asynchronous power grids including a bulk power grid and controlling power so that the sum of inflow power and outflow power is zero. An intra-power grid synchronous network system includes a power apparatus control terminal device with means for controlling power for a power apparatus installed in an autonomous power grid. A plurality of inter-power grid asynchronous interconnection network systems are connected to an intra-power grid synchronous network system to integrate the power control with communication control.

A power generating system 1 comprises a power generator 2 generating DC power, and an inverter circuit 3 for converting DC power into AC power; the power generator 2 comprises a plurality of power generating modules 21-28 each comprising a plurality of power generating units 30 and at least one electric storage means connected to each of the plurality of power generating modules 21-28. A plurality of first switch means S11a-17a connect / disconnect each of the positive electrodes 62 of the plurality of power generating modules 22-28 to / from a positive bus 6, a plurality of second switch means S11b-17b connect / disconnect each of the positive electrodes 62 of the plurality of power generating modules 22-28 to / from the negative electrodes 60 of the power generating modules 21-27 contiguous to the one side, a plurality of third switch means S1-S7 connect / disconnect each of the negative electrodes 60 of the plurality of power generating modules 21-27 to / from a negative bus 7, and the DC output voltage can be increased / decreased stepwise by switching the switch means S1-S7, S11a-17a and S11b-S17b.

A power generating system includes a power generator generating DC power, and an inverter circuit for converting DC power into AC power. The power generator has a plurality of power generating modules each including a plurality of power generating units and at least one electric storage device connected to each of the plurality of power generating modules. A plurality of first switch devices connect / disconnect each of positive electrodes of the plurality of power generating modules to / from a positive bus, a plurality of second switch devices connect / disconnect each of the positive electrodes of the plurality of power generating modules to / from negative electrodes of the power generating modules which are contiguous to one side, a plurality of third switch devices connect / disconnect each of the negative electrodes to / from a negative bus, and the DC output voltage can be increased / decreased stepwise by switching the switch devices.

The invention relates to a heterogeneous mobile communication network power control method. In one embodiment, a method used in a heterogeneous mobile communication network comprising neighboring macro base stations and low-power nodes is provided and include steps of I, determining an acceptable interference value by the macro base station according to average interference noise level of a physical uplink shared channel; II, sending the acceptable interference value to a low-power node from the macro base station via an X2 interface or an air interference; III, determining uplink transmission power compensation factor by the low-power node; and IV, determining uplink transmission reference power by the low-power node according to the acceptable interference value of the neighboring macro base stations. By the methods in different technical schemes, flexible and reasonable power control or resource scheduling of the heterogeneous mobile communication network can be realized, inter-cell interference especially inter-cell interference of heterogeneous base stations is lowered, and integral performance of the heterogeneous mobile communication network is improved.

The present invention provides a multi-terminal power conversion device, a multi-terminal power transfer device, and a power network system which allows an existing power grid to be divided into a plurality of power grids that can be interconnected together and operated stably via existing or new transmission lines. An inter-power grid asynchronous interconnection network system includes a multi-terminal power conversion device characterized by connecting together a plurality of asynchronous power grids including a bulk power grid and controlling power so that the sum of inflow power and outflow power is zero. An intra-power grid synchronous network system includes a power apparatus control terminal device with means for controlling power for a power apparatus installed in an autonomous power grid. A plurality of inter-power grid asynchronous interconnection network systems are connected to an intra-power grid synchronous network system to integrate the power control with communication control.

The invention provides a method for use in implementing an ultra wideband RF front end. It included: medium frequency signals inputted from multi-path wideband are combined at communicator side through multiplexer, and the combined medium frequency signals are up- converted to RF to make a multicarrier transmission so that the difficulty for designing a quadraphase modulator in communicator and a part of high speed A / D converting circuit are reduced.

A workflow system allows determining at least one date based on various factors including the complexity of a task, a participant's history as monitored by the workflow system, and a participant's profile as entered by the participant. In addition, the workflow system generates customized notifications according to the participant's reliability in meeting due dates in the past and a notification preference specified by the participant. The result is a powerful and flexible workflow system. The dates determined by the workflow system may include one or more due dates for tasks and one or more dates for notifications to participants.

The invention relates to a motor-driven steam mop which comprises a handle (1), a mop head (2) assembled on the lower portion of the handle (1), a floor mopping mechanism arranged on the mop head (2), a motor-driven system driving the floor mopping mechanism to move and a steam system delivering the steam to the floor mopping mechanism. The motor-driven system is installed on the handle and is connected with the floor mopping mechanism through a transmission mechanism. The motor-driven steam mop adopts a motor structure arranged on the handle, drives the floor mopping mechanism on the mop head to move through the transmission mechanism in the connector, reduces size of the mop head, and especially reduces height of the mop head, so that the mop becomes small and exquisite, is suitable for being used by houses, simultaneously enables electrified parts to be far away from water and steam and better separates water from high voltage electricity. In addition, the mop head is not electrified and can be placed in water to be washed after being disassembled, thereby being safe and convenient. The motor-driven steam mop replaces manpower with electric power and is high in efficiency, safe and reliable.

The invention provides a method for combining dynamic radio resource allocation and mobility load balancing in an LTE system. The optimization objective of the method is that the network resource efficiency is maximized under the limiting conditions of inter-cell interference and limited resources in cells. The feasible suboptimization scheme is that optimization is performed at two stages of resource allocation and load balancing. Firstly, a heuristic allocation algorithm based on a lagrangian multiplier method is utilized to allocate physical resource blocks and powers for all of users in a network at the resource allocation stage, the resource efficiencies of all of physical resource blocks in the network are obtained according to resource allocation results; secondly, users capable of maximizing the network resource efficiencies are selected and switched to corresponding target cells at the load balancing stage. By adopting the method, the network resource efficiencies can be maximized, and the system performance and the user experience are improved.

The invention discloses a flow battery energy storage system for wave power generation. The flow battery energy storage system comprises a charge device which is connected with a wave power generation device, a galvanic pile group which is connected with the charge device, and an electrolyte storage device which is connected with the galvanic pile group through a pipeline system, wherein the electrolyte storage device comprises a positive electrode electrolyte storage tank and a negative electrode electrolyte storage tank; a flow battery system is formed by the galvanic pile group, the pipeline system and the electrolyte storage tank; the charge device is used for charging the flow battery system by virtue of the electric energy output from the wave power generation device; after being separated from the galvanic pile group, the electrolyte storage tank can be loaded and transported away through transportation equipment. The flow battery energy storage system is used for achieving on-site storage, effective transfer and targeted release of electric power converted from wave power, and is relatively flexible and reliable when being compared with a power transmission mode by virtue of seabed cables.

The invention discloses a liquid metal magnetohydrodynamics generation system driven by a single-loop travelling-wave thermoacoustic engine. The liquid metal magnetohydrodynamics generation system comprises the single-loop travelling-wave thermoacoustic engine (1), wherein a U-shaped electrical insulation pipeline is arranged between a resonatron (16) and a containing cavity (17) of the single-loop travelling-wave thermoacoustic engine (1); the electrical insulation pipeline is full of a liquid metal working medium; and a liquid metal magnetohydrodynamics generator (2) is arranged in the electrical insulation pipeline. Compared with the existing thermoacoustic driven magnetohydrodynamics generation system, the thermoacoustic engine in the liquid metal magnetohydrodynamics generation system driven by the single-loop travelling-wave thermoacoustic engine is small in size, light in weight, high in energy density and low in onset and operating temperature, and is more suitable for utilization of heat sources in medium and low temperature zones; and in addition, the output characteristic of the generation system is well improved, so that demands of power transmission and power utilization equipment can be well met.

The invention discloses a mixed thermal force closed type heat extraction cycle heat engine and a power generation device, and relates to a multi-heat-source environment-friendly closed type heat extraction cycle heat engine which comprises a solar device, and the power generation device and belongs to the technical field of combined heat and power generation of solar. The mixed thermal force closed type heat extraction cycle heat engine consists of a double-heat-source heating assembly, a cycle heat engine assembly, a speed change and power generation assembly, an intelligent control system and accessories; the double-heat-source heating assembly comprises a barrel wall, a punching bottom plate, a heat preservation upper blanking plate, a heat energy reflector, a light condensation receiving port, an automatic light shading cover, an electromotor of the light shading cover, a metal upper cover plate, a metal lower cover plate, a porous metal fiber combustion head, a flame igniter, a combustor foundation, and a residual heat recovery pipe; and the cycle heat engine assembly consists of a working medium heating pipe group, an air chamber, cycle gas, a magnetic pole gas distribution piston, an electromagnetic gas distribution seat, a buffer sheet, a double-pole switch room, a piston cylinder, a power piston and a cooling working medium; and the speed change and power generation assembly consist of a conversion piece, a crank, a rocking bar, a gear, a transmission shaft, an engine base and a generator.

The invention belongs to the technical field of solar photovoltaic, and particularly relates to a solar photovoltaic power generation device convenient to install and move. The solar photovoltaic power generation device convenient to install and move aims to solve the problems that an existing solar photovoltaic power generation device is not easy to move and not easy to install, and the use by outdoor staff is influenced. The solar photovoltaic power generation device convenient to install and move comprises a supporting base plate; a shell is connected to the top of the supporting base platethrough bolts; rectangular openings are formed in the two ends of one side of the shell; and a drawer box and a storage battery are connected in each rectangular opening in a clamped mode. The solarphotovoltaic power generation device convenient to install and move has the advantages that the inclination angles of a main solar panel and two auxiliary solar panels are adjusted through a supporting rod, installation and fixation of the solar photovoltaic power generation device can be rapidly completed by rotating a steering rod, so that the solar photovoltaic power generation device is simpler and more convenient to use, the main solar panel and the two auxiliary solar panels are protected against damage, and meanwhile, the two folded auxiliary plates form a table top, so that outdoor useis facilitated.

The invention relates to the technical field of solar thermal power generation, in particular to a slot type concentrated solar Sterling power generation system. The system comprises a slot type solar thermal collector, a circulating pump and a free-piston Sterling generator, wherein the slot type solar thermal collector, the circulating pump and the free-piston Sterling generator communicate in sequence via a hot fluid delivery pipeline; the slot type solar thermal collector heats a heat transfer fluid therein by reflecting sunlight; the circulating pump drives the heat transfer fluid to circularly flow in a power generation loop; and the free-piston Sterling generator converts heat energy transferred by the heated heat transfer fluid into electric energy. The slot type concentrated solar Sterling power generation system is formed by combination of the slot type solar thermal collector and the free-piston Sterling generator which are relatively high in market maturity currently, and solves the problems that existing solar thermal power generation systems are complex in structure, large in initial investment and long in construction cycle.

An installation for charging electric cars includes the following features: charging columns, direct-current lines, rectifiers, three-phase alternating-current lines, a single-phase alternating-current line and a cooling arrangement. The direct-current lines electrically connect the charging columns to the rectifiers. The three-phase alternating-current lines electrically connect the rectifiers to a medium-voltage transformer. The single-phase alternating-current line electrically connects the medium-voltage transformer to the cooling arrangement.

The invention relates to a heat collecting device for collecting heat of a disc type or tower type solar reflector. The heat collecting device has the characteristics of being high in heat collectingefficiency, high in heat collecting temperature and wide in range of heating media, and has important meaning in reducing photo-thermal power generation cost and improving the reliability and efficiency of a power plant. The heating heat transfer media can be water, conducting oil, fused salt, supercritical carbon dioxide, hydrogen, helium and the like. The device can be widely applied to the aspects of a drier, a large hot water project, large photo-thermal power generation and the like, can be combined together with a Stirling engine effectively to form a set of novel solar Stirling power generation system which is simple in structure, convenient to mount, flexible to build and short in building period, and has the characteristics of being good in reliability, flexible in power, high inefficiency, environment-friendly and the like.

The invention discloses a flexible multi-state adjustment switch adjustment-based voltage adjustment system. The system is characterized in that a detection unit comprises a first detection unit and asecond detection unit, wherein the first detection unit is connected between a power supply in a power distribution network and a first detection end of a TVR control system, the second detection unit is connected between a load in the power distribution network and a trigger unit and is used for detecting a power supply current signal, a power supply voltage signal, a load voltage signal and a load current signal in the power distribution network, the trigger unit is connected to a second detection end of the TVR control system and is used for sending an external fault signal to the TVR control system, a first output end of the TVR control system is connected to a voltage regulation control strategy unit, the TVR control system is used for generating and sending a voltage regulation control signal, and the voltage regulation control strategy unit is used for adjusting an output voltage of the power supply according to the voltage regulation control signal. With the system disclosed by the technical scheme, the running condition of the power distribution network is monitored and adjusted in real time, and the voltage adjustment accuracy is improved.

An installation for charging electric cars includes the following features: charging columns, direct-current lines, rectifiers, three-phase alternating-current lines, a single-phase alternating-current line and a cooling arrangement. The direct-current lines electrically connect the charging columns to the rectifiers. The three-phase alternating-current lines electrically connect the rectifiers to a medium-voltage transformer. The single-phase alternating-current line electrically connects the medium-voltage transformer to the cooling arrangement.

The invention discloses a multifunctional charging pile system based on a DC (direct-current) solid-state transformer. The system comprises a photovoltaic array, an intelligent convergence box, a storage battery, the DC solid-state transformer, a controller, a low-voltage DC / DC converter, multiple charging guns and multiple charging interfaces, wherein the photovoltaic array is connected with theintelligent convergence box; the DC solid-state transformer is connected with the intelligent convergence box, the storage battery, the multiple charging guns and the low-voltage DC / DC converter, andthe low-voltage DC / DC converter is connected with the multiple charging interfaces; the control device is used for controlling the storage battery, the DC solid-state transformer and the low-voltage DC / DC converter. The system is not required to be powered by an AC network, and source-charge distance can be effectively reduced, so that energy loss and harmonic distortion caused by repeated AC andDC conversion are avoided; meanwhile, the charging guns and the charging interfaces share a booster circuit and an inverter circuit of the DC solid-state transformer, therefore, size and cost of the charging pile system can be remarkably reduced, and utilization rate of equipment is increased.

The invention discloses a direct current collection system of a wave power generation device and a control method and system of the direct current collection system, the direct current collection system comprises n sub-modules, and each sub-module comprises two half-bridge modules and a high-frequency inductor. The low-voltage sides of the sub-modules in the direct-current current collection system are dispersed and can be independently connected to the wave energy generator set; the high-voltage side sub-modules are connected in series and connected with a high-voltage direct-current network, high-voltage electric energy transmission is achieved, and the construction cost of the converter and the network structure thereof is effectively reduced. The invention further provides a control method and system of the direct-current current collection system, and series decoupling, independent control, power bidirectional flow and self-adaptive control of the wave energy generator set of the high-voltage side submodules are achieved. Therefore, the technical problems of poor stability and high cost in the prior art are solved.

The invention discloses a liquid metal magnetohydrodynamics generation system driven by a single-loop travelling-wave thermoacoustic engine. The liquid metal magnetohydrodynamics generation system comprises the single-loop travelling-wave thermoacoustic engine (1), wherein a U-shaped electrical insulation pipeline is arranged between a resonatron (16) and a containing cavity (17) of the single-loop travelling-wave thermoacoustic engine (1); the electrical insulation pipeline is full of a liquid metal working medium; and a liquid metal magnetohydrodynamics generator (2) is arranged in the electrical insulation pipeline. Compared with the existing thermoacoustic driven magnetohydrodynamics generation system, the thermoacoustic engine in the liquid metal magnetohydrodynamics generation system driven by the single-loop travelling-wave thermoacoustic engine is small in size, light in weight, high in energy density and low in onset and operating temperature, and is more suitable for utilization of heat sources in medium and low temperature zones; and in addition, the output characteristic of the generation system is well improved, so that demands of power transmission and power utilization equipment can be well met.

The invention discloses a demand response-oriented variable frequency air conditioner aggregation control method. The method comprises the following steps: establishing an electrical parameter model of a variable frequency air conditioner; establishing a thermal parameter model of the variable frequency air conditioner; establishing a virtual energy storage model of the variable frequency air conditioner; proposing to obtain a temperature maintenance strategy; proposing a control strategy of VSOC priority; and proposing a linear recovery strategy. According to the method, a variable frequencyair conditioner load virtual energy storage model which is more beneficial to practical application and a corresponding variable frequency air conditioner control strategy are provided, so that the power of the is reduced to the power when the temperature is kept unchanged, and the purpose of meeting the power shortage as far as possible under the condition of ensuring the comfort degree is achieved.

The invention discloses an implementation method of a semiconductor blue laser module with adjustable pulse width. The device comprises a shell, a polarization beam combiner, an output mirror and a plurality of sub-modules are installed on the shell, the polarization beam combiner is arranged in front of the sub-modules, the output mirror is arranged in front of the polarization beam combiner, and each sub-module comprises a heat sink carrier installed on the shell. A driving circuit control board, a high-speed photoelectric detector PD chip and a plurality of COS blue-light semiconductor laser chips are mounted on the heat sink carrier, a substrate of the driving circuit control board is a PCB (printed circuit board) made of aluminum nitride ceramics or FR4 materials, and the driving circuit control board is electrically connected with the high-speed photoelectric detector PD chip and the COS blue-light semiconductor laser chips respectively. And the COS blue light semiconductor laser chip corresponds to the polarization beam combiner in position. The invention has the following beneficial effects: high peak power; the size is small; the pulse width can be freely tuned and switched between continuous pulse output and ns-level pulse output; and a pulse synchronous output self-calibration function is realized.

A method for quasi-synchronous tuning of wavelength or frequency of grating external-cavity semiconductor laser and a corresponding semiconductor laser are provided. A grating or mirror is rotated around a quasi-synchronous tuning point (Pq) as rotation center, so as to achieve the frequency selections by grating and resonance cavity in quasi-synchronous tuning, wherein the angle of the line between the quasi-synchronous tuning point (Pq) and a conventional synchronous tuning point (P0) with respect to the direction of light incident on the grating is determined according to the angle difference between the incidence angle and diffraction angle of light on the grating. According to present invention, approximately synchronous tuning of laser is achieved with a simple and flexible design.

The invention relates to a heterogeneous mobile communication network power control method. In one embodiment, a method used in a heterogeneous mobile communication network comprising neighboring macro base stations and low-power nodes is provided and include steps of I, determining an acceptable interference value by the macro base station according to average interference noise level of a physical uplink shared channel; II, sending the acceptable interference value to a low-power node from the macro base station via an X2 interface or an air interference; III, determining uplink transmission power compensation factor by the low-power node; and IV, determining uplink transmission reference power by the low-power node according to the acceptable interference value of the neighboring macro base stations. By the methods in different technical schemes, flexible and reasonable power control or resource scheduling of the heterogeneous mobile communication network can be realized, inter-cell interference especially inter-cell interference of heterogeneous base stations is lowered, and integral performance of the heterogeneous mobile communication network is improved.

The invention discloses a modular large-current parallel starting and generating integrated controller and a control method, and belongs to the field of starting and generating integrated controllers. The modular large-current parallel starting and generating integrated controller comprises a starting control module, a plurality of power generation modules and a function module, and can realize large-current power generation output and large-current motor driving output; all modules are controlled in a full-digital mode, so that control is flexible, expansion is convenient, and power density is high; the starting control module is used as a main module to communicate with other modules through a serial port bus, read data and send commands, and adopts separate layout of large-current and high-voltage signals and small signals to reduce mutual interference; the starting control module serves as a main module and can communicate with other devices through RS422, CAN, RS485 and the like. An engine starting controller and a generator power generation controller can be organically integrated together, part of power devices and control logic are shared, the weight and the size are reduced, and seamless connection of starting and power generation is achieved.