42results about How to "Power flexible" patented technology

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.

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.

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 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.

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 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.