831 results about "Renewable power generation" patented technology

A method, system and computer program product enhance the commercial value of electrical power produced from a wind turbine production facility. Features include the use of a premier power conversion device that provides an alternative source of power for supplementing an output power of the wind turbine generation facility when lull periods for wind speed appear. The invention includes a communications infrastructure and coordination mechanism for establishing a relationship with another power production facility such that when excess electrical power is produced by the wind turbine facility, the excess may be provided to the power grid while the other energy production facility cuts back on its output production by a corresponding amount. A tracking mechanism keeps track of the amount of potential energy that was not expended at the other facility and places this amount in a virtual energy storage account, for the benefit of the wind turbine facility. When, the wind turbine power production facility experiences a shortfall in its power production output it may make a request to the other source of electric power, and request that an increase its power output on behalf of the wind turbine facility. This substitution of one power production facility for another is referred to herein as a virtual energy storage mechanism. Furthermore, another feature of the present invention is the use of a renewal power exchange mechanism that creates a market for trading renewable units of power, which have been converted into “premier power” and / or “guaranteed” by secondary sources of power source to provide a reliable source of power to the power grid as required by contract.

A method of power system dispatch control solves power system dispatch problems by integrating a larger variety of generation, load and storage assets, including without limitation, combined heat and power (CHP) units, renewable generation with forecasting, controllable loads, electric, thermal and water energy storage. The method employs a predictive algorithm to dynamically schedule different assets in order to achieve global optimization and maintain the system normal operation.

A renewable energy generator imposes costs on a power grid from rapid fluctuations in output. A device is disclosed that collects data on renewable power production, meteorological and other information, forecasts short timescale renewable power production then mitigates costs incurred by power fluctuations by modulating the power output, while maximizing power production revenue. Mitigation may be effected by an AC / DC inverter, an energy storage system, demand response or a FACTS device. The magnitude and costs for modulating response required from energy storage, FACTS or other power modulation equipment is thereby reduced.

The present invention includes a system and method for generating, controlling and storing dispatchable renewable energy. The system may include one or more wind power generation facilities and one or more solar power generation facilities to generate power that can be stored by one or more storage facilities. The power can be supplied to a power grid at a level determined by actual or predicted weather conditions, based on variable power demands. The power generated by the renewable energy sources may be combined with power generated by conventional power generation facilities to provide power in a dispatchable manner.

A method and apparatus for a portable renewable energy generator includes; a movable platform adapted for one of towing and transport to a remote area, a redundant renewable energy source generator including a wind energy extraction device configured for transport on the movable platform, and a battery system operably connected to the redundant renewable energy source generator. The battery system is configured to store electrical energy generated by the redundant renewable energy source generator.

The invention discloses a microgrid real-time energy optimizing and scheduling method in a parallel running mode. The method comprises the following steps of: firstly, dividing 24 hours in a day into a peak period of time, a general period of time and a trough period of time according to the load condition of a large power grid; and then, monitoring the working state of an accumulator in a microgrid in real time in the real-time process of the microgrid and adopting different energy optimizing strategies according to different periods of time and different working states of the accumulator soas to confirm the active power output of various schedulable micro power supplies, the charging and discharging power of the accumulator and scheduling instructions of the active power interactive with the power grid and the passive power of a passive adjustable power supply in the microgrid. The microgrid suitable for the invention comprises a reproducible energy generator, the schedulable micropower supplies and the accumulator. The invention not only can improve the economy and the reliability of the microgrid, but also can help the great power grid to cut peaks and fill troughs and is favorable to prolonging the service life of the accumulator.

A method and apparatus for a portable renewable energy generator includes; a movable platform adapted for one of towing and transport to a remote area, a redundant renewable energy source generator including a wind energy extraction device configured for transport on the movable platform, and a battery system operably connected to the redundant renewable energy source generator. The battery system is configured to store electrical energy generated by the redundant renewable energy source generator.

Energy services business methods gather up many small pieces of renewable energy generation, energy efficiency, and controllable energy demand reductions en a grid, and present all that in a unified interface to a power utility. The individual constituents benefit from collective bargaining with, a large utility, and can receive energy discounts, rebates, and bonuses for their participation.

The present invention relates to an energy resource-grid-load automatic control system of smart microgrid and control methods thereof, which belong to the field of microgrid control and electrical technology. The energy resource-grid-load automatic control system comprises a distributed renewable energy power generation module, a distributed renewable energy inverter module, a conventional power generation module, a user load module, a bidirectional grid-connected control module, a distributed renewable energy intelligent optimizing power generation control module, an energy storage module, an intelligent energy storage unit adjuster and a storage battery pack. Compared with the conventional microgrid comprising a distributed renewable energy power generation system, the present invention guarantees the stability and the high energy utilization of the power generation system and effectively solves the problem of non-uniform frequency of use of storage batteries to unify the service life of the storage battery pack.

An offshore power generator is disclosed. The offshore power generator includes an offshore platform, which can be a new, existing, abandoned, removed, dumped or relocated fixed or floating offshore platform; one or more types of current, wind, wave and other renewable energy generators mounted to the offshore platform; and interconnecting power cables, in electrical communication with the current generators for distribution from the generators to end users.

An offshore power generator includes an offshore platform. Current, wind, wave and other renewable energy generators are mounted to the offshore platform. Each current generator has a shroud enclosing a set of blades. A hub member is located within the shroud and extends in an upstream direction from the blades. The flow area between the interior of the shroud and the hub member converges from the shroud inlet to the blades.

The invention relates to an offshore renewable energy source comprehensive power generating system, belonging to the technical field of renewable energy source power generation. The comprehensive power generating system comprises a single pile structure (1), three power generating devices and an electrical connecting circuit. The three power generating devices comprise a wind power generating device, a wave energy power generating device and a tidal energy power generating device which are respectively connected with a direct-current bus (19) in the comprehensive power generating system in parallel by three direct-drive permanent magnet generators (3-1, 3-2, 3-3) and three rectifiers (16-1, 16-2, 16-3), and connected to a reverser (21) on the bank by a seabed cable (20), and finally merged in a power grid by a boosting transformer (22). The offshore renewable energy source comprehensive power generating system can integrate the offshore wind energy power generation, wave energy power generation and tidal energy power generation to an organic combined body, and realizes the compatibility of various power generating devices and the credible connection of various power generating devices with the power grid by the electrical connecting system.

A method and apparatus for renewable power generation utilizes the chemical potential dissimilarity between solutions of differing ionic formulations. A train is formed by a sequentially ordered set of a plurality of cells in which each successive cell is related to the preceding cell. Each cell has pumping means and hydro-power generation turbine means to form a closed hydraulic loop configured for specified volumetric and flow capacity. Adjacent cells share semipermeable membranes. Each cell is charged with a brine of specified ionizable inorganic salt quantity and type with the brine being cycled in a controlled concentration-pressure loop, with each of the cells operating at progressively increasing concentration and osmotic pressure ratio. A continuous and constant flow rate of substantially salt-free permeate flux is maintained across each cell, the flux being osmotically induced from low salt concentration water being fed at the first cell in the train and exiting at the last cell along with the discarded high concentration water brine. The salt-free permeate flux is continuously induced, in symbiotic mode, through the shared membranes, driven by the chemical influence of concentration potential field bounded by water of low to no salt concentration on one end of the train and by brine of high salt concentration on the other end of the train with sufficient concentration difference to provide driving force for said plurality of cells, while maintaining adequate concentration difference between adjacent cells to enhance osmosis function, as well as defining a concentration ratio within each cell to ensure a net positive power generation.

A renewable electric power system includes a high temperature superconducting wind turbine using high temperature superconducting yttrium-barium-copper oxide for the rotor and stator windings as well as a superconducting bearing. Power from the turbine is stored in a high temperature superconducting magnetic storage system that also uses HTS YBCO. Also included is a regenerative solid oxide fuel cell / electrolyzer with steam turbine cogeneration. The system operates on a managed day / night cycle. During daytime, the energy produced by the wind turbines and fuel cells is transmitted to the grid. During nocturnal hours, the wind turbine is used to provide low cost electricity to the reversible fuel cells operating in the electrolysis mode producing hydrogen and oxygen that is stored for later use. Alternatively, the fuel cells can remain in electrolysis mode producing hydrogen and oxygen for the market. A modified interactive system generates power on a continuous twenty-four hour cycle.

The invention provides a control method of a grid friendly type distributed power source based on hybrid energy storage. The method comprises the steps of optimally designing a topology structure of the distributed power source, controlling a direct current power supply system in a coordinating mode through a direct current (DC) / DC converter controlling a model normalization model, and self-adaptively controlling a grid of an alternating current (AC) side DC / AC converter. The distributed power source not only can be connected in a large grid to operate so as to reduce the influence of intermittent renewable energy power generation grid connection on the grid and provide support of voltage and frequency for the grid, but also can be connected into a micro-grid to operate as a network unit of the off-network type micro-grid to maintain stability of voltage and frequency of the off-network type micro-grid. When an outer grid breaks down, the distributed power source can realize switch between a grid mode and an island mode so as to improve power supply reliability of important loads in the system. The distributed power source improves technical performance and economic performance of the whole system through matching utilization of an energy type system and a power type energy storage system.

The invention relates to a method for evaluating the new energy development potential of regional power grids based on power generation absorption. New energy power characteristics are described from the level of new energy output power parameters, and power grid structure constraints are described from the level of power grid load flow calculation parameters. Based on a sequential production simulation method, by establishing a multi-period load flow optimization evaluation model and adopting matlab software for programming simulation calculation, a corresponding new energy receptivity evaluation model is established with the power generation of new energy units as the objective function and the new energy wind curtailment / light curtailment rate as the constraint. The new energy development degree of the regional power grids is comprehensively measured, visual development potential measurement indexes are obtained finally, and the new energy receptivity trend of the regional power grids is analyzed in a drawing mode. The power generation of the power grids by renewable energy absorption is simply and visually calculated, and reasons for the insufficient new energy receptivity of the power grids are analyzed. The economy and safety of power grid operation are analyzed based on various operation scenes, and the new energy receptivity of the power grids under various scenes is studied.

The invention discloses a two-stage coordinated optimization and control-based running method of a combined cooling heating and power supply type microgrid. The running method comprises the steps of 10) performing inter-day rolling dispatching of the combined cooling heating and power supply type microgrid, in which optimal dispatching is performed by taking minimum running cost of the combined cooling heating and power supply type microgrid as an optimal target and combining forecast renewable energy generation power and load demand according to a running constraint condition of the system, and rolling output of each equipment and electricity purchase or sale quantity from a power grid are determined; and 20) building a real-time dispatching module of the combined cooling heating and power supply type microgrid, correcting an inter-day rolling dispatching result by taking dispatching fluctuation penalty-based minimum running cost of the combined cooling heating and power supply type microgrid as the optimal target and combining the renewable energy generation power and a load demand real-time value according to a real-time running constraint condition, and determining real-time output of each equipment in the combined cooling heating and power supply type microgrid and an electricity purchase or sale quantity real-time value. By the running method, the purpose of running economy and stability of the combined cooling heating and power supply type microgrid is achieved.

The invention discloses an LLC resonance type three-port DC-DC converter and a control method thereof. The converter is composed of a primary side circuit, a secondary side circuit, a transformer and LLC resonant network. The primary side circuit is composed of a full-bridge unit integrating two paths of two-way buck-boost circuits connected in parallel in a staggered mode. The secondary side circuit is composed of a rectifier circuit. The transformer and LLC resonant network is composed of a high-frequency transformer, a resonant inductor Lr, an excitation inductor Lm and a resonant capacitor Cr. By adjusting the duty ratios and frequencies of power switch tubes of the primary side circuit, two-way energy transmission and output one-way energy transmission between two ports of the primary side can be effectively controlled at the same time. According to the converter and the method, a non-isolation type two-way buck-boost converter is integrated with an isolation type full-bridge LLC resonant converter, so that multiplexing of the primary side switch tubes is achieved, the number of the switch tubes is reduced, cost is reduced, and power density and reliability are improved. The converter is suitable for renewable energy source power generation, hybrid electric vehicles, fuel cell vehicles, hybrid energy storage systems and other systems.

The invention discloses a distributed optimal scheduling method for a multi-energy complementary microgrid containing multiple bodies based on an ADMM in the field of power system microgrid technology. According to the method, operators and users form optimal interaction based on an ADMM framework till supply and demand balance is reached. In the optimal iteration process, the operators and the users can complete optimal scheduling just by exchanging expected power supply capacity and heat supply capacity and actual power supply capacity and heat supply capacity, and therefore the privacy of the operators and the users is greatly protected. Due to efficient energy cascade utilization of cogeneration combined with a heat storage system, demand responses at the user side and renewable energy power generation, the method has the advantages of saving energy, reducing emissions, relieving the pressure of power grids and the like; a comfortable indoor temperature is set, the comfort of the users is considered, and the economical efficiency and the subjective intentions of the users are comprehensively considered in terms of cost. The method is an optimal method with lower cost and higher feasibility for economic operation of the multi-energy complementary microgrid.

A method of power system dispatch control solves power system dispatch problems by integrating a larger variety of generation, load and storage assets, including without limitation, combined heat and power (CHP) units, renewable generation with forecasting, controllable loads, electric, thermal and water energy storage. The method employs a predictive algorithm to dynamically schedule different assets in order to achieve global optimization and maintain the system normal operation.

The invention discloses a wind-power hydrogen-manufacturing energy storage hydrogen fuel composite cell and a power generation method thereof. The cell comprises four working modes according to the intensity of wind. During strong wind, the cell employs a wind-power hydrogen-manufacturing energy storage power generation mode, and the wind power within the rated power is used for the power generation of an external grid, and the remaining wind power is converted into hydrogen for storage. When the intensity of wind is smaller, the cell employs an all-system operation mode, supplies the wind power to the external grid, starts a fuel cell power generation system, and converts the hydrogen energy of the hydrogen storage system into electric energy. When the quality of wind power is poorer, the cell employs a wind-power hydrogen-manufacturing fuel power generation mode, and the wind power is just used for manufacturing hydrogen and the fuel cell power generation system supplies power to the outside at the same time. When wind needs to be abandoned according to the scheduling requirements, the cell employs an independent operation mode, and the fuel cell power generation system enables the stored hydrogen to be converted into high-quality electric energy and enables the high-quality electric energy to be fed to a grid. The cell can effectively iron out the defects of the intermittency and fluctuation of renewable energy power generation (wind power), improves the controllability of output power of an electric field, and improves the stability level of power generation.

The invention broadly encompasses a system including a communications network, a plurality of remotely located data sources to provide power data, the power data including quantitative and qualitative data of one or more renewable energy power generation units, and a performance monitor in communication with the plurality of remotely located data sources through the communications network, the performance monitor including a data store to store the power data, and a power manager to manage generation of power from the one or more renewable energy power generation units.

A distributed renewable energy system includes a renewable energy generating module having an array of renewable energy generators connected to a population of distributed power inverters. The distributed renewable energy system also includes a distributed energy metering module having a data aggregating unit that receives output energy data from the population of distributed power inverters and a data processing unit that calculates a revenue grade output energy from the output energy data based on a tolerance probability characteristic of the output energy data. The distributed renewable energy system additionally includes a distributed energy reporting module that reports the revenue grade output energy. A method of measuring distributed renewable energy is also provided.

A power generation system comprises a conventional motor-generator system as may be found in a stand-by power system with the addition of integrated renewable and stored energy assets. A software defined control system allows for optimizing total cost of power and allows user control or interconnection with micro-grid or Utility Power systems.

The invention relates to a source-load peer-to-peer electric energy interaction method based on Internet+, and the method comprises the steps: analyzing the characteristics of a distributed power supply and loads in a power distribution system, building an Internet+ information platform, and dividing the local grid nodes into source nodes and load nodes based on the geographic distribution positions of the distributed power supply and the loads and the source-load characteristics, thereby achieving the integration of the sources and the load to a certain degree, gathering many sources to supply power to the loads, and achieving the participation in the interaction in a mode of an integrated node. The source-load takes the information platform as a data communication sharing basis, therebyachieving the mutual perception and the peer-to-peer interactive transaction in a local region. The method can well respond to the randomness and fluctuation of renewable energy power generation, achieve the local and instant consumption, avoids the larger loss caused by the transmission of the renewable energy power generation power through a power grid, alleviates the transmission pressure of apower grid, quickly promotes the source-load transaction, and achieves the dynamic optimization.

The invention discloses a photovoltaic power generation system structure integrating energy storage and grid-connected and off-grid power supply functions and a control method, which can realize storage and conversion of renewable energy sources such as solar energy to electric energy and meanwhile have gird-connected and off-grid power supply functions. The structure comprises a photovoltaic component, a direct current-direct current booster circuit, a three-phase inverter circuit, an isolating transformer, a PCC (Programmable Computer Controller) grid-connected switch, a local load and the like. According to the control method, seamless switching between grid-connected / off-grid working modes of the system can be realized, and stepless regulation of output power of photovoltaic batteries and optimal management of accumulators can also be realized. Compared with the conventional photovoltaic grid-connected inverter, the photovoltaic power generation system has the prominent advantages of simple structure, rich function, high power supply reliability and the like, contributes to improving the utilization efficiency of renewable energy resources for power generation and has excellent application and generalization prospect.

The invention discloses a process and equipment for converting carbon dioxide in flue gas into natural gas by using dump power energy. According to the process, water is electrolyzed by using the dump power energy to generate hydrogen gas; the hydrogen gas and carbon dioxide captured from industrial flue gas are enabled to generate methanation reaction; meanwhile, water is heated by using the heat generated by the methanation reaction to generate superheated water vapor for driving a steam turbogenerator to generate power which is used for supplementing power energy for electrolyzing water, and thus natural gas which can be conveniently stored or conveyed is obtained by synthesizing. The equipment is mainly formed by combining a transforming and rectifying device, an electrolytic bath, a steam turbogenerator, a carbon dioxide heater, at least two-stage of fixed bed reactors, various indirect heat exchangers, a steam drum, a natural gas condenser and a process water pipeline. According to the process and equipment disclosed by the invention, the defects that internet obstacles exist or power is excessive in a short time and difficult to store in a mode of generating power by using renewable energy sources are effectively overcome, the problem that the environment is polluted by room temperature gases in a mode of generating power by using fossil energy is effectively solved and the renewable energy sources and carbon dioxide waste gas can be reasonably utilized.