694 results about "Light storage" patented technology

The invention discloses a dual-layer optimization method for power distribution network expansion planning and light storage locating and sizing. The method comprises the steps of building an upper-layer optimization model for active power distribution network expansion planning: determining a target function and constraint conditions of the upper-layer model; building a lower-layer optimization model for light storage capacity configuration: determining a target function and constraint conditions of the lower-layer model; and solving the upper-layer model and the lower-layer model: executing an upper-layer model optimization method, a lower-layer model optimization method and a dual-layer optimization method. According to the method, the built dual-layer optimization models taking a distribution network enterprise and users as subjects and taking calculation of optimal economic cost as a target comprehensively analyze economic influence of light storage system access and power distribution network expansion planning on the distribution network enterprise and the users; a planning model taking annual cost expense as a target function can well assess the economy of a power distribution network; and the light storage system can be reasonably configured, so that the power purchase costs of the users are effectively reduced, the on-spot consumption of photovoltaic energy is increased, and the network loss of a power distribution system can be effectively reduced.

Provided is a co-scheduling strategy for multiple energy storage in a distributed light storage micro-gird system. The based multiple energy storage adopts a two-stage converter topology structure comprising a preceding-stage bidirectional DC/DC conversion unit and a back-stage DC/AC conversion unit. A bidirectional DC/DC conversion unit for a storage battery and a bidirectional DC/DC conversion unit for a super capacitor share a DC bus, and are connected with a load and a large power grid through the DC/AC conversion unit and via an LC filter. The co-scheduling method of a two-stage converter for multiple energy storage is characterized by when the distributed light storage micro-gird system is in a grid-connected mode, carrying out double filter control on the two-stage converter for multiple energy storage, controlling the energy-storage element to carry out smooth photovoltaic output power fluctuation, and carrying out adjustment on filtering parameters according to the charge state of the super capacitor and the charge state of a storage battery; and when the distributed light storage micro-gird system is in an off-grid state, controlling the energy-storage element to provide voltage and frequency support to the distributed light storage micro-gird system, the distributed light storage micro-gird system jointly providing power for the load, wherein the energy-storage element is the storage battery and the super capacitor.

A surface illuminant comprises a light source 11 consisting of LEDs, a light guide plate 12 which is optically coupled to said light source for guiding the light to one side thereof and a reflective film 13 which is disposed on the other opposite side of said light guide plate. The light guide plate 12 is made of a material into which a wave length converting material 14 or a light storage material 15 such as fluorescent material is incorporated. A desired color light can be obtained by converting the wave length of the light from the light source 11 or light can be emitted by storing the light when the light source is turned off.

The invention provides a direct current micro-grid coordination control method of a light storage electric car charging station, and relates to the micro-grid technology field. The technical problem is solved that a direct current bus voltage is kept smooth and stable. The method employs a storage battery and flywheels for hybrid energy storage, a direct voltage is divided into five levels from high to low, layered coordination optimization control of a direct current bus is carried out, and coordination optimization control of photovoltaic power generation, electric car charging and discharging, load power requirements and grid side converter charging and discharging in a charging station direct current micro-grid is carried out. The method can keep balance of the system power in different operation modes of charging station micro-grid island and grid connection and achieves stable control of a direct current bus voltage.

The invention discloses a wind and light storage generating unit capacity optimal configuration method based on the rated capacity. The method comprises the following steps that firstly, a model is established according to the distribution situation of the local wind resource and the local light resource; secondly, a storage battery device is controlled according to the principle about utilizing the renewable energy sources to the maximum degree and performing constant output, and a coordinated operation strategy of the system is formulated; thirdly, a target function is set to show the expenditure in the life cycle of a generating unit and, and the expenditure is set to be minimal; fourthly, the constraint condition of capacity optimal configuration is determined; fifthly, a fuzzy logic control method is utilized for dynamically adjusting an energy converting model of an energy-storing storage battery so that the energy converting model can achieve rapid convergence; sixthly, based on the target function and the constraint condition, the target function of the generating unit and capacity proportion optimal values of all parts are resolved according to an improved iteration and self-adaptation genetic mixed algorithm. According to the method, a power grid can conveniently assess the generating capacity of the generating unit, and the power grid can easily formulate the dispatching plan and improve the accepting degree for the renewable energy sources.

The invention discloses a method for distributing the active power of a wind-light storage transmission comprehensive power station, which is characterized in that a target optimizing distribution model is created based on a dynamic optimization objective and constraint conditions thereof; according to the set power (pset) of the wind-light storage transmission comprehensive power station, wind-light storage resource behaviors are considered; dynamic, unified and coordinated active power distribution of a wind power station, a photovoltaic power station and stored energy batteries in the wind-light storage transmission comprehensive power station is carried out, and the running of the wind-light storage transmission comprehensive power station is optimized, thus ensuring the smoothness ofthe output power, reducing the fluctuation of the output power, improving the stability of the output power of the system, decreasing the influences of the fluctuation of the output power on power grid frequency, utilizing the wind, the light and stored resources more effectively, improving the utilization rate of wind energy resources and solar energy resources, realizing the technical effects of considering the service life of power generation and energy storage equipment.

The invention belongs to the field of distribution network dispatching and managing, which provides a wind-light storage combined dispatching method and system used for distributed microgrid island operation. According to collected real-time data as well as photovoltaics and fan power generation and power load prediction data obtained by calculation, the total output power of photovoltaics and fan and a load and energy storage inverter system are coordinated and controlled to satisfy the requirement of system power balancing; the energy storage and the load of the photovoltaics, a fan and a storage cell are considered in a coordinating mode; a control signal is emitted to cause each inverter to output active power required by a microgrid system to achieve the optimal energy use ratio; therefore, the microgrid system can integrate the power generation and power consumption situations between three systems of a fan system, a photovoltaic system and an energy storage system and load so as to coordinate each subsystem to effectively operate; when an external grid is detected to restore to be normal, the microgrid system is switched to a grid-connected operation mode according to a grid-connected and island mode switching control strategy, and the economy and the stability of the microgrid system in the island mode can be improved.

The invention provides a light-storage type EV (electric vehicle) charging and converting station, belonging to the field of power supply systems. The station is used for solving the problems caused by taking an alternating current power grid as a power supply source in the existing EV charging and converting station. The light-storage type EV charging and converting station comprises a photovoltaic generating system, a storage battery energy accumulation system, an EV charging station and a station-used load, wherein the photovoltaic generating system comprises a solar battery assembly, a grid connected inverter and a photovoltaic power supply management system, and is suspended on a power supply bus of the photovoltaic system; the storage battery energy accumulation system comprises a storage battery pack, a battery management system and a dual-direction inverter, and is suspended on a power supply bus of the load; the EV charging and converting station and the station-used load are suspended on the power supply load of the load; and the power supply bus of the photovoltaic system and the power supply bus of the load are respectively connected with a 380V bus in the alternating current power grid, and are connected by a photovoltaic access breaker.

The invention discloses a visible light response solar battery, comprising transparent opposite electrodes, electrolyte, dye sensitizer, semiconductor material film and transparent conductive glass stacked in turn between transparent glass, where the transparent glass is coated with a 1-100 mum thick film layer of rare-earth light storage material which is rare-earth containing oxide, sulfide, or oxysulfide with long afterglow performance. And the ligh storage rare-earth functional material can store part of solar energy and emits visible light at night to make the solar battery absorb part of the emitted visible light at night to continue operating, and simultaneously the unabsorbed visible light emitted by the light storage material can be used to decorate and illuminate. And the invention can fully absorb UV and visible light from sunlight, improving photoelectric converting efficiency of the solar battery. If the solar battery and glass are combined and used in buildings or street lamps, they can play the role of saving energy and decorating.

The invention discloses an active optimal control system of a wind and light storage combined power generation system and a method. The active optimal control system comprises a wind and light storage combined power generation system control central station and wind and light storage combined power generation system control substations. The method includes drawing out a power output curve of a wind power station, a photovoltaic power station and an energy storage power station according a planed power output curve and by considering correlated conditions of the wind power station, the photovoltaic power station and the energy storage power station, and distributing correlated plans to all control substations; and working out generation plans of corresponding control units according to power output plans distributed by all control substations, and executing power output plans distributed by control substations finally by the control units. By the aid of the control process, the wind and light storage combined power generation system can be guaranteed to operate according to the force output curve, charge-and-discharge times of storage batteries can be reduced, low current charge-and-discharge of the energy storage power station is avoided, the short-time overload capability of the energy storage power station is fully utilized, and the service life of the energy storage power station is prolonged.

The invention discloses a method for achieving power grid light storage system capacity configuration and optimization distribution. The method for achieving the power grid light storage system capacity configuration and the optimization distribution includes the following steps: (1) a photovoltaic electricity generation grid-connected system model is established; (2) the model is conducted with load flow calculation, and whether power grid operation meets constraint conditions is judged; if the power grid operation meets the constraint conditions, a next step is conducted; and if the power grid operation does not meet the constraint conditions, the step (1) is returned to, and a power grid parameter is modified; (3) initial emulating calculation is conducted to obtain an index value before energy storage system access; (4) N access points of an energy storage system are conducted with emulating calculation, so that an index value after the access is obtained; (5) an index of each access point is conducted with normalization processing, so that an objective subfunction is generated; (6) N objective functions with variable balance coefficients are obtained through the generated objective subfunction; (7) an assessment result is obtained through objective function computational analysis; and (8) the assessment result is conducted with optimal value choices. According to the method for achieving the power grid light storage system capacity configuration and the optimization distribution, a power grid is provided with fast active and reactive power support. The power grid voltage stability level is improved, and the network loss is lowered. Besides, the accuracy and the generality are improved.

The invention provides a wind-light-storage island-type combined cooling, heating and power system based on solar light-heat utilization. The system comprises a wind energy conversion system, a solar heat collecting system, a micro compressed air energy-storage system and a heat storage system. When wind speed is high, surplus electric energy drives a multistage compressor to compress air from a level of atmospheric pressure to a higher level of pressure to be stored into a compressed air storage pipeline, and heat in the process of compressing is recovered into the heat storage system, at the moment, supplying of cold energy and heat energy is realized after pumped thermal-state heat conducting oil is shunted and enters an absorption-type refrigerating system and a heating system. When the wind speed is low, after absorbing heat from the heat storage system, compressed air enters a turbine to expand for doing work so as to fill a demand gap of electric energy, so that demands of a user on cold energy and heat energy are met through the thermal-state heat conducting oil.

The invention relates to a light-pipe system for conducting/distributing light and air, which can also purify indoor air, particularly in a building, or the like. The light-pipe system includes a light-pipe for conducting light and having a clear top dome mounted at the top of the light-pipe to let in sunlight but keep out dust, rain and UV. An emitter fitted to the bottom of light-pipe improves the light distribution into the room, and a ventilation stack laid around the light-pipe coaxially/or non-coaxially, and a photocatalyst film (e.g. Nanometer TiO2) coated on the outer surface of the emitter for purifying indoor air under the illumination of light from light-pipe. The air and light are conducted separately along two different transport paths. The light-pipe system can provide illumination, ventilation and air purification simultaneously. The light source may be daylight, artificial light, light storage material or a mixture of them. Air can be moved naturally and/or is transported mechanically. Mirrors in the light-pipe may be used to control brightness and distribution.

The invention discloses a method for planning a station construction capacity ratio of a wind-light storage and transmission mixed power station. In a planning target, energy conservation and emission reduction are quantified on the aspect of earning and fit into the target of planning the station construction capacity ratio of the wind-light storage and transmission mixed power station; meanwhile, on the basis of a station construction site spatial constraint and a station construction planning capacity constraint, constraints of the wind-light resource complementation degree, the power station power output stability and energy utilization degree are introduced so as to finally form a station construction capacity ratio planning model; and the planning model is solved to acquire the station construction capacity ratio of the wind-light storage and transmission mixed power station. By the method, a target function of the planning model and a constraint condition are more in accordancewith an actual situation, so that the acquired station construction capacity ratio is more accurate.

The invention provides a distribution network reliability evaluation method considering light storage continuous load carrying capacity. The method specifically includes the steps of firstly, conducting a clustering analysis on photovoltaic output historical data; then, establishing a photovoltaic output time sequence model under different weather types; and finally, simulating the operating state of a distribution network considering the light storage continuous load carrying capacity through a Monte Carlo method and obtaining a reliability index of the distribution network. The invention is innovative in three aspects: first, taking into account the impact of the time sequence of photovoltaic output on the reliability of the distribution network under the different weather types; second, obtaining an island dynamic division strategy after the failure of the distribution network by calculating the light storage continuous load carrying capacity under a constant confidence level; and third, proposing the distribution network reliability evaluation method considering island operating characteristics.

A light-collecting luminescent pigment and luminescent fiber thereof are disclosed. The pigment consists of light-collecting powder with strontium aluminate as substrate 30-45wt%, refractive reflecting powder 10-15wt% and carrier 40-60wt%. It has excellent wetting ability and adhesion. It can be used for luminescent fiber and other luminescent products.

The invention relates to a sending end power grid power source structure planning method considering local load peak regulation capacity. A power source structure planning model is established in combination with various actual constraint conditions such as peak regulation constraints on the basis of considering wind and light storage peak regulation capacity and local load peak regulation capacity. The method comprises the following steps: establishing a power source structure planning model considering local load peak regulation capacity; obtaining a unit maintenance plan, considering to addthe power and local load peak regulation capacity of an energy storage wind power plant and a solar power station, and carrying out random production simulation of wind, solar energy, water, fire andpumping storage power generation; and obtaining hybrid particle swarm optimization to solve the power source structure planning model, and thus obtaining an optimal power source structure planning scheme. Compared with the prior art, the method has the advantages that users and electric automobiles are considered to serve as local load to participate electric power system peak regulation actively, the difference between peak and valley of the system can be reduced effectively and the difficulty of electric power system peak regulation is relieved.

The invention relates to a fluorenyl organic framework material, a preparation and application method thereof. A material which is provided with a framework structure shaped as a Chinese character ri and constructed by the method disclosed by the invention is taken as a new generation organic semiconductor to be applied to an organic electronic device. The structure of the material is shown in the specification. The material has the characteristics that (1) monomers are synthesized via a Grignard reaction and a Friedel-Crafts reaction, the raw material is inexpensive and the synthesis method is simple; (2) the material has high heat stability and glass transition temperature; (3) the material is good in flexibility and high in solubility; and (4) due to the accumulation effect of diaryl fluorine, the material is good in electrooptic activity. The fluorenyl organic framework material can be applied to the organic electronic field of film devices such as organic light emitting display, organic light storage, organic photovoltaic cells, organic field effect transistors and organic laser, and the like. Electroluminescent devices prepared by using the material disclosed by the invention show satisfactory results in luminance, luminous efficiency and voltage resistance stability.

The invention discloses a method for controlling power coordination of a light storage micro-grid system. The light storage micro-grid system comprises a photovoltaic cell array, two DC/DC converters, a storage cell energy storage device, an inverter and alternating-current and direct-current buses. The photovoltaic cell array is connected into the direct-current bus by the boost DC/DC converter, storage cells are connected into the direct-current bus by the boost and buck DC/DC converter, direct currents are converted into alternating currents by the direct-current bus via the inverter, the alternating currents are connected onto the alternating-current bus, and the direct-current bus and the alternating-current bus can be respectively connected with direct-current load and alternating-current load. The method is characterized in that structure diagrams of the light storage micro-grid system are given, and particular power exchange principles and particular working modes of the system are analyzed. The method has the advantages that light storage micro-grid system coordination control structures and MPPT (maximum power point tracking) control principles on the basis of dynamic impedance matching are given, accordingly, smooth power switch of the light storage micro-grid system can be controlled by the aid of the method, and the control precision of the system can be improved.

The invention provides fluorescent light, light-accumulation fluorescent light, lighting device and light-accumulation lighting device whose luminescence property is perfect. Firstly, the shortwave ultraviolet radiation (254nm) generated by the fluorescent light inspires long wave ultraviolet radiation or purple luminescence material, then the light omitted by the long wave ultraviolet radiation or purple luminescence material inspires other luminescence material to obtain fluorescent light, light-accumulation fluorescent light, lighting device and light-accumulation lighting device whose luminescence efficiency is high, coloration is good, color range is wide.

The invention provides a fuzzy adaptive control based method for tracking output of a power generation plan of a light storage system. The method comprises the following steps of reading relevant data of a photovoltaic station and an energy storage system; randomly simulating day-ahead actual output of photovoltaic power generation, and building a chance constraint planning tracking model containing a control coefficient; determining a target power control coefficient by using a fuzzy adaptive control method; and controlling the working condition coefficient of the energy storage system according to time frames so as to determine a charging and discharging power optimization scheme. According to the method provided by the invention, a more accurate control coefficient is screened out, the traditional defect of coefficient adjustment by manual based on experience is avoided, and a light storage combined power generation tracking effect is effectively led to be between an upper limit and a lower limit of the plan and is also maintained to be optimal; and the charging and discharging power and the charged state of the energy storage system both are kept in an appropriate range, the charging and discharging ability is improved, the requirement for the energy storage system is reduced, and a solution scheme is provided for a day-ahead scheduling plan of the output of the energy storage system in the actual engineering application.

The invention provides a hybrid energy storage power coordination control method in a combined light storage power generation system. The method comprises steps that, dual-layer control on the combined light storage power generation system is employed, and power distribution of a hybrid energy storage unit is realized through frequency coordination control; according to available capacity apportionment instruction power of the hybrid energy storage unit, management on expect frequency absorption or emission of each current transformer is carried out. Through the method, impact of high frequency photovoltaic fluctuation components on the electrical network is reduced, schedulability and electrical network friendliness of a distributed photovoltaic power generation system are improved, and a new method is provided for operation and control of the combined light storage power generation system.

The embodiment of the invention discloses a black-start method of an off-grid light storage micro-grid with a shared alternating-current bus. The black-start method comprises the steps that the electric quantity in a storage battery is obtained, and whether the electric quantity in the storage battery is large enough to support generation of a micro-grid voltage and micro-grid frequency by a bidirectional energy storage converter is judged; if not, first black-start logic is started, wherein the starting of the first black-start logic comprises the step of controlling a photovoltaic inverter to be in a V/F control mode and the bidirectional energy storage converter to be in a P/Q control mode, so that the black-start ability of the off-grid light storage micro-grid with the shared alternating-current bus is improved when the electric quantity in the storage battery is insufficient. In addition, the invention further discloses an energy management system and the off-grid light storage micro-grid with the shared alternating-current bus.

The invention discloses a photochromic material for blue light storage, which is prepared by mixing one or more of 1-30% inorganic aqueous solutions or colloidal sols with 1-20% of organic molecular solution, agitating and making films on clean substrates with the obtained colloidal sol through casting method or rotary coating method.

The invention provides a distributed energy storage system for improving confidence capacitance of a photovoltaic power station. The distributed energy storage system comprises a light storage monitoring system and at least two light storage units, wherein the light storage monitoring system is connected with a power grid management system of the photovoltaic power station and used for receiving a power grid dispatching command and issuing a power adjustment command to the light storage units; each light storage unit comprises a battery energy storage unit, a bidirectional DC/DC converter, a photovoltaic module and a photovoltaic grid-connected inverter; and the light storage monitoring system comprises the photovoltaic station supervisory control and data acquisition (SCADA), a light storage combined power control unit, a battery unit management device and a battery unit integrated management device. Compared with the prior art, the distributed energy storage system for improving the confidence capacitance of the photovoltaic power station, provided by the invention has the advantages that the distributed energy storage system is applicable for the photovoltaic power station on a large land, the grid connection of the energy storage unit is achieved by means of the existing grid-connected photovoltaic inverter, the cost of the energy storage system is reduced, and the reliability of the light energy system is improved through distributed access and control of the energy storage unit.

The invention discloses a wind and light storage intelligent micro-grid economic dispatch control method. The method comprises the steps that 1, related running data is obtained through micro-grid running parameter data; 2, according to meteorological data, short-term power prediction is conducted on a distributed power supply in a micro-grid by means of a time-order character optimization model,and meanwhile a BP neural network model is utilized for conducting short-term power prediction on a load in the micro-grid; 3, on the basis of distributed power supply short-term power prediction, load short-term power prediction and energy storage system stage-of-charge and stage-of-charge threshold value of an energy storage system, and running modes of wind power, photovoltaic power generationand the energy storage system are determined; the purpose that the wind power and photovoltaic power generation can be consumed to the maximum extent is achieved, and meanwhile the technical effect ofbeing good in power quality and economical efficiency is guaranteed.

The invention discloses a decision method for rolling optimization of wind and light storage cooperative scheduling. The decision method comprises the following implementation steps of: acquiring day-ahead prediction values of load, wind power of wind power farms and output power of photovoltaic power stations and data such as charging demand of each electric automobile recharging station; arranging a day-ahead plan of a next-day charging plan of each electric automobile recharging station, wherein the plan can meet energy demands of electric automobiles of each electric automobile recharging station and reduce the peak valley difference rate of equivalent load curves, so that the peak pitching pressure of the conventional machine sets is reduced, and the energy access level of renewable energy is improved; and continuously modifying the rolling of the charging plan of each electric automobile recharging station in rest time period of a current day in real time through the updated predication data acquired every hour such as the load, the wind power of the wind power farms and the output power of the photovoltaic power stations of the rest time period of the current day in the operation of the current day, so that the problem that an actual equivalent load curve smoothing effect of the current day is weakened by the charging plan of each electric automobile recharging station due to prediction errors is solved as possible.