30results about How to "Generating power is stable" patented technology

The invention belongs to the technical field of distributed generating micro-grid systems, and provides an energy management system for the grid-connected operation of a wind and photovoltaic power storage micro-grid system, wherein the micro-grid system is connected to an alternating-current bus through a current conversion system and connected with a large power grid, and the factory load is also connected to the large power grid. The wind and photovoltaic power storage micro-grid system is composed of at least a wind driven generator unit, at least a photovoltaic power generation unit and at least an energy storage device. The micro-grid energy management system controls the grid-connected operation of the wind and photovoltaic power storage micro-grid system, and carries out starting, stopping and power control on each unit of the wind and photovoltaic power storage micro-grid system, so that each unit of the wind and photovoltaic power storage micro-grid system can run safely and stably, only supplies power to the factory load and does not supply power to the large power grid. According to the invention, through the energy management of the wind and photovoltaic power storage micro-grid system, each unit of the wind and photovoltaic power storage micro-grid system can carry out grid-connected operation safely; and when the factory load is changed, the energy management system carries out starting, stopping and power control on each unit of the wind and photovoltaic power storage micro-grid system, so that each unit of the wind and photovoltaic power storage micro-grid system can run safely and stably, only supplies power to the factory load and does not supply power to the large power grid.

The invention discloses a pitch change and torque change combined control method of a variable-speed wind turbine generator system. Unmodeled dynamics and disturbance are considered to build a simplified dynamic model of the wind turbine generator system. Power adjustment error dynamic characteristics are calculated. A sliding mode surface and switching functions are selected to design a self-adaption updating mechanism of sliding mode gaining to obtain sliding mode variable structure electromagnetic torque control signals. Wind wheel rotating speed anticipant error dynamic characteristics aredefined. The simplified dynamic model of the wind turbine generator system is rewritten to obtain a pitch angle initial expression. Approach results of a low-pass filter to non-affine uncertain itemsand disturbance items are substituted into the pitch angle initial expression to obtain a pitch angle final expression. The combined control method can preferably deal with non-affine uncertain characteristics of the wind turbine generator system, is simple in structure and excellent in robustness, can provide more stable wind wheel rotating speed and power generation power, reduces mechanical load of the wind turbine generator system, prolongs the service life, and provides high-quality electric energy to a power grid.

The invention discloses a wave energy recovery device and an energy recovery method based on an electrochemical principle, belonging to the technical field of ocean wave energy energy recovery. , the energy recovery mechanism includes a working electrode, a diaphragm and a counter electrode. The working electrode is made of an electric double layer structure material, and the energy recovery mechanism adopts the pressure-induced potential change characteristics of the electric double layer structure material to recover the waves generated by the change of the seawater level. The energy is converted into electric energy, and the energy recovery mechanism obtains the current liquid level change according to the relationship between the power corresponding to the electric energy converted from the wave energy and the corresponding liquid level change and the current power, thereby realizing the real-time recovery of ocean wave energy. The invention can also convert wave energy into electric energy under lower pressure frequency, can recover wave energy lower than the lowest recovery frequency of the existing wave energy recovery device, and widen the recoverable wave frequency range.

The invention discloses a variable-pitch robust control method based on a UDE for a wind generating set. The method comprises the steps of creating a dynamic model of wind-driven generators on the basis of unmodeled dynamics and disturbance of the wind generating set; defining dynamic characteristics of regulation errors and expectation errors; rewriting the dynamic model of the wind generating set and obtaining a preliminary expression of a pitch angle controller; arranging a low pass filter for carrying out approximation on non-affine uncertain items and disturbance terms of the dynamic model of the wind-driven generators, substituting the approximation result into the preliminary expression of the pitch angle controller, carrying out Laplace transformation, carrying out inverse Laplace transformation after merging and sorting and obtaining final pitch angle control signals. In the design process, the problem that the design of a non-affine system controller is difficult is solved, the unmodeled dynamics and the environmental disturbance of a system are fully considered, the structure of an obtained controller is simple, the number of needed parameters is small, the robustness is good, the anti-jamming capability is high, a more stable wind wheel rotation speed and more stable generation power can be provided, and high-quality electric energy can be provided for a power grid.

The embodiment of the invention provides an AGC control device which comprises an AGC instruction formation circuit of new energy access and a plant level load instruction distribution circuit. The AGC instruction formation circuit of new energy access is used for compensating an AGC instruction of a gas turbine power plant sent by a dispatching center according to a deviation value of a regional power generated by new energy power generation. The plant level load instruction distribution circuit is used for distributing and adjusting a load instruction of a gas turbine according to the actual power generation power of the gas turbine and the AGC instruction compensated by the AGC instruction formation circuit of new energy access. According to the system, a regional grid power generation power deviation value caused by renewable new energy intermittent power generation can be compensated through a gas turbine power generation set, thus the whole power generation system can output smooth power generation power, an adverse effects of the renewable new energy intermittent power generation on a power grid is eliminated, the fluctuation of new energy intermittent power generation power in a regional grid is stabilized, and the power generation power complementary of a gas turbine power plant and a new energy power plant is realized.

The invention discloses a hardening film for protecting a photovoltaic glass anti-reflection layer. The hardening film is obtained after coating the surface of the photovoltaic glass anti-reflection layer with hardening liquid and carrying out ultraviolet curing. The thickness of the hardening film coating ranges from 2 micrometers to 5 micrometers, and the hardening liquid is obtained after modified acrylate, photoinitiator, infrared reflection filler, a flattening agent and a solvent are evenly mixed according to the mass ratio of 100:(5-10):(0.1-0.5):(0.1-1):(10-30). Damage of severe external factors such as wind sand and hail to the glass anti-reflection layer can be effectively blocked, a proper amount of infrared reflection filler is added into the hardening liquid, part of pyrogenic infrared rays causing heating of an assembly can be reflected, the temperature of the inner layer is reduced, and good application prospects are achieved in the photovoltaic field, the photothermal field, the building field, the greenhouse field, the decoration field and other fields.

The invention discloses a water flow energy storage power generation device, which comprises a generator, a support guide wheel and a chain driving the support guide wheel to rotate. There are at least two support guide wheels, which are installed in a row along the direction of water flow. The two supporting guide wheels are connected by a chain, and a plurality of water buckets are fixed on the chain. Spindle connected. The present invention is installed in the main river course or channel, which utilizes the kinetic energy of the water flow itself to generate electricity, and does not need to build dams, drainage pipes, pressure pipes, special channels for transporting equipment, etc., and has minimal destructive effects on the ecological environment. Stable and less affected by weather and other factors; the present invention can determine the total number of water buckets and the total length of the chain or set multiple sets of water energy collection devices according to the kinetic energy of the flowing water and the power of the generator, which overcomes the problems of existing hydroelectric generators. The water energy is not enough to support power generation and other shortcomings.