12 results about "Work output" patented technology

The application discloses a kind of active support control method, device and medium of wind turbine, it is related to wind turbine active support control technical field, for the problem that current power grid voltage fault cannot identify power grid parameter, and then active support control effect is not good, provide a kind of active support control method of wind turbine.The voltage and current data of grid-connected point before and after power grid failure are collected to determine the parameter change of power grid before and after voltage failure.Furthermore, the short-circuit point position, short-circuit current and transition resistance value are identified, and the determination of all unknown quantities in the wind turbine grid-connected point voltage model after failure is realized.At this time, all parameters in the wind turbine grid-connected point voltage model after failure are known, the equivalent voltage and equivalent impedance of the power grid after failure can be determined, and the power grid parameter identification during failure is completed.Based on the identified power grid parameters during failure, the active and reactive output current optimal proportion of wind turbine can be redesigned, and better support for power grid voltage recovery effect is brought.

The invention provides a wind turbine generator self-adaptive network construction method and device, and the method comprises the steps: collecting the related operation state data of a wind turbine generator based on the active output power, the reactive output power, the rotor speed and the frequency deviation in real time, and comprehensively and accurately mastering the operation conditions of the wind turbine generator at different moments. A small signal stability analysis model and a mapping relation are determined based on state-space equations of a machine-side converter, a grid-side converter and an energy storage converter of the wind turbine generator, so that the model can more accurately describe dynamic characteristics of the wind turbine generator in different converter working states, and the stability of the wind turbine generator in different operation conditions is evaluated. The virtual inertia correction, the damping coefficient correction and the voltage droop coefficient correction required by network construction are obtained through analysis, then adaptive control parameters and converter modulation signals are determined, the running state and power output of the converter can be adjusted in real time according to the change of the power grid frequency, and virtual inertia, damping and voltage support are provided.

The invention discloses an energy conversion method and device based on a gravity field gas vertical pressure gradient, and relates to the technical field of gravity field gas thermodynamic cycle and energy conversion. Comprising the steps that a closed circulation channel composed of a gas conveying power unit, a gas conveying expansion unit, an acting output unit and a gas backflow unit is filled with working gas; the working gas at the low position is driven to rise in the vertical direction, adiabatic expansion and acceleration are carried out under the pressure decreasing condition, and gas internal energy and pressure energy are converted into kinetic energy; the high-speed gas is guided into the acting output unit to drive the generator set to generate electricity; and the acting gas naturally settles and is compressed in the backflow channel by virtue of gravity, exchanges heat with the environment in the settling process to recover the initial state, and then enters the power conveying unit again. According to the invention, a closed circulating acting path utilizing the vertical pressure gradient of the gravity field is constructed, and the comprehensive utilization efficiency of low-grade heat energy and gas pressure energy is improved.

The utility model discloses a dual-output hybrid power device, which relates to the technical field of vehicle power and comprises an engine, a power output component is mounted on the engine, a generator shell is fixedly mounted on the engine and positioned at the power output component, a power generation rotating shaft is rotatably mounted on the generator shell, and a power generation rotating shaft is mounted on the generator shell. One end of the power generation rotating shaft is fixedly connected with the power output component; a plurality of circumferentially arranged stators are mounted in the generator shell, a plurality of rotors are mounted on the power generation rotating shaft, and the stators or the rotors are of excitation structures; an operation output machine shell is fixedly installed on the generator shell, and an operation output shaft connected with the power generation rotating shaft is rotationally installed on the operation output machine shell. The traction and operation requirements can be met at the same time, and power conversion is convenient.

An electric submersible pump (ESP) assembly. The ESP assembly comprises a centrifugal pump assembly comprising a plurality of pump stages, wherein each pump stage comprises a diffuser and an impeller, wherein the impeller comprises a plurality of impeller vanes, wherein each impeller vane comprises an impeller vane trailing edge that attaches to a shroud of the impeller at a location downstream of a location where the impeller vane trailing edge attaches to a hub of the impeller, and wherein the diffuser comprises a plurality of diffuser vanes, wherein each diffuser vane comprises a diffuser vane leading edge that attaches to a shroud of the diffuser at a location downstream of a location where the diffuser vane leading edge attaches to a hub of the diffuser.

Methods and systems related to power generation and thermal management for combined cycle architectures. In particular, methods and apparatus for cooling a surface on an aircraft and generating power are provided, the methods and apparatus including propelling the aircraft at a speed of at least 3 Mach causing the surface to heat up aerodynamically. A first working fluid is circulated through a first fluid circuit, the circulation heating the first working fluid by a heat-absorbing section that is thermally coupled to the surface, and the first working fluid is expanded in a first heat engine to generate a first work output. A second fluid circuit has a second working fluid that receives heat from the first working fluid, and a second heat engine that generates a second work output. The first and second work outputs are operatively coupled to first and second power generators, respectively, to power primary or auxiliary systems on the aircraft.

The application discloses a three-position mechanism with a quick opening function, comprising a rack, a closing device, an opening device, a grounding device, an opening tripping device, an energy storage device, a motor driving module and a main shaft device arranged on the rack, the motor driving module is detachably arranged on the rack, a transmission mechanism is arranged between the closing device and the energy storage device, the transmission mechanism comprises a double cam, the energy storage device releases energy to drive the closing device to close through the double cam, the opening device is linked with the opening tripping device, the opening tripping device is linked with the closing device, the closing device and the grounding device are respectively linked with the main shaft device, and the main shaft device outputs closing and opening torque and grounding torque to a load switch, the traditional component design mode is changed, the three-position mechanism is light and beautiful under the condition of meeting the functional requirements, the closing power output efficiency is improved, and the artificial operation force is reduced.

The application discloses a novel multi-mode variable cycle two-stroke piston engine, which is used for an aviation compound power system of shaft power and gas output modes and belongs to the technical field of aero-engines. The novel multi-mode variable cycle two-stroke piston engine comprises a spark plug, a cylinder, a scavenging port, a piston, a crankcase, a crankcase exhaust port, a crankcase exhaust electric control one-way valve, an air inlet, a main exhaust port, a supplementary combustion chamber, a supplementary combustion agent inlet, a cylinder top exhaust port and a cylinder top exhaust electric control one-way valve. The novel multi-mode variable cycle two-stroke piston engine is provided with an exhaust pipe provided with an electric control one-way valve at the top of the cylinder and the crankcase based on a conventional two-stroke engine. In the shaft power output mode, the cylinder top exhaust port and the crankcase exhaust port are closed, the original two-stroke piston engine shaft power output working mode and performance are retained, in the gas output mode, the electric control one-way valve opens all the exhaust ports, high-pressure gas is basically discharged during the up-and-down movement of the piston, and the engine becomes a gas generator at this time, which can be used for wing tip jet power or an APU of an aero-engine.

This utility model discloses a brake operating device and a winch drum brake device, relating to the field of winch drum brake technology. It includes a pneumatic combined pressure regulating valve and at least one self-locking cylinder. The pneumatic combined pressure regulating valve has a pressure regulating valve handle, a first working output port communicating with the rod chamber of each locking cylinder, and a second working output port communicating with the rodless chamber of each locking cylinder. The control gas pressure increases as the pressure regulating valve handle is pushed up or pulled down at an increased angle. The self-locking cylinder is fixedly mounted on one side of the brake shaft, and a connecting bracket is rotatably mounted on the piston rod end of the self-locking cylinder. The connecting bracket is fixed to the brake shaft. When the control gas is disconnected, each locking cylinder is in a self-locking state; and in the self-locking state, the current extension length of the piston rod of each locking cylinder remains unchanged. The structure is simple, occupies little space, requires no prolonged holding, and is easy and convenient to operate.

This invention discloses a computer apparatus whose instructions describe a process which greatly improves the analysis of system entropy flows, irreversible losses and Carnot Reversibilities associated with heat exchangers used in all thermal engines. Irreversible losses include those from shell and tube heat exchangers, as a component, and those from the shell-side of heat exchangers such as condensers. The understanding of any thermal engine lies with either understanding its inputs and useful power output, and / or understanding system losses. This disclosure focuses on entropy flows and system losses. It results in revision to the classic Carnot Engine resulting in an Exergetic Engine. Although Exergetic Engine's roots are embedded in Carnot's device, its invention is uniquely created by recognizing true thermodynamic irreversibility associated with any heat exchanger is determined by the summation of its internal exergy flows. This leads to a correction of Sadi Carnot's THot. For the nuclear engine, his TCold is also redefined as a Fixed TRef dependent on neutronic constants and the core's coolant properties. Correcting his 200 year-old teachings produce a highly accurate irreversible loss, and thus a highly accurate Carnot Reversibility which improves the thermodynamic understanding of all thermal engines. With such improved understanding, the system operator has actionable intelligence which can protect the public, and corrects degradations within the power plant which improve operations.

This motor diagnostic device includes: a rate-of-change kinetic energy calculation section for calculating, based on the actual rotational speed of a motor, a value relating to the rate of change of total kinetic energy obtained by summing the kinetic energy of the motor and any device driven by the motor; a total work calculation section configured to calculate a total work value that is the sum of a value relating to the rate of change of total kinetic energy calculated by the rate-of-change kinetic energy calculation section and a value relating to the actual power output of the motor;a theoretical work calculation section configured to calculate a theoretical work value, which is a theoretical value of the engine's work output, based on a fuel flow rate command value; and an engine diagnostic section configured to diagnose an engine abnormality based on the total work output calculated by the total work calculation section and the theoretical work output calculated by the theoretical work calculation section.

An energy conversion device transforms kinetic and thermal energies of gas flows into usable work. It features a duct with an inlet and outlet for the gas flow and a cascade of at least two turbines located in distinct zones of the duct. A post-turbine gas cooling system, associated with the first turbine, includes an injector of evaporating liquid regulated by a controller using real-time data from pressure and temperature gauges. The first turbine's performance is enhanced by pressure and temperature differentials created by the cooling system. The second turbine prevents ambient air intrusion and further converts residual kinetic energy. Both turbines can be coupled either to electric generators or to mechanical devices or both for converting the turbines work output either to electricity or to mechanical work or to both.