37 results about "Composite power systems" patented technology

The invention belongs to the technical field of power generation of hybrid power of an MCFC (molten carbonate fuel cell), and particularly relates to a hybrid power system using a normal pressure MCFC to recover CO2 in exhaust gas of a gas turbine. According to the hybrid power system disclosed by the invention, a gas-steam combined cycle system which does not recover the CO2 is taken as a reference system, and then an integrated scheme utilizing the MCFC to capture the CO2 is proposed. The hybrid power system comprises a gas turbine, an MCFC, an oxygen ion transport film, a high-temperature air turbine, a residual heat boiler and a CO2 recovery unit, and low-CO2 emission of the gas turbine is further realized. Products of an after-combustion chamber of the MCFC only comprise CO2 and H2O, and the loss of power is reduced during the separation and storage processes of the CO2; and the hybrid power system disclosed by the invention fully utilizes residual heat in the high-temperature exhaust gas of the gas turbine and a component thereof, namely the greenhouse gas CO2, as well as the residual heat in the high-temperature exhaust gas of the MCFC and an OTM (optical touch module), and the CO2 in the exhaust gas of the gas turbine can be recovered by utilizing the MCFC with low energy consumption.

The invention belongs to the technical field of pressurized carbon dioxide (CO2) zero-emission solid oxide fuel cell (SOFC) composite power generation, in particular to an integrated oxygen transmission membrane (OTM) pressurized CO2 zero-emission SOFC/ gas transmission (GT)/air transmission (AT)/steam turbine (ST) composite power system. An SOFC/GT/ST composite power system which is free from recycling CO2 is adopted as a benchmark system to integrate the OTM, the high temperature AT and a CO2 recycling unit to obtain a CO2 zero-emission composite power system which has high efficiency, saves energy and is environment-friendly, so the energy of the system can be adequately and efficiently utilized in a gradient way, the efficiency is high, only CO2 and H2O are discharged after the combustion, so the CO2 is convenient to separate and collect, the power consumption can be reduced, and high efficiency can be realized after the CO2 is recycled.

The invention relates to a free piston expander-linear generator vehicle waste heat recovery system based on a composite power system, and belongs to the field of energy saving and emission reduction.A novel free piston expander-linear generator integrated unit is provided to serve as a thermoelectric conversion device, and the new vehicle waste heat recovery system is designed based on the composite power system; and by means of the system, engine exhaust energy is converted into high-grade electrical energy to be used for driving motors through the composite power system. The system can effectively improve the fuel economy of the engine, reduces fuel consumption, reduces CO2 and pollutant emission, meanwhile, prolongs the service life of a battery and meets the requirements of a vehicle-mounted power supply for high energy and high power.

The invention discloses a composite power system and a control method. The composite power system comprises at least one lithium battery module, at least one low-temperature fuel cell module and at least one fuel module fixed together. The lithium battery modules, the low-temperature fuel cell modules and the fuel modules are electrically connected with a battery management unit. The fuel modulesare electrically connected with the low-temperature fuel cell modules. The low-temperature fuel cell modules are electrically connected with the lithium battery modules. The lithium battery modules are electrically connected with the fuel modules. The fuel modules provide fuel for the low-temperature fuel cell modules, and the low-temperature fuel cell modules supply power to the lithium battery modules. The power system has a compact structure and occupies small area. Through the control method of the composite power system, the composite power system has higher safety performance and is morestable in power supply, and the performance of the power system can be improved.

The invention discloses a cooling and power combined supply method and device of an adsorptive heat pump and relates to the technical field of heat power. In the method, an expansion machine is a substitute for a cooling cycle condenser and a throttling reliever of the absorptive heat pump, cooling cycle of the adsorptive heat pump is improved into cooling and power combined supply cycling of the adsorptive heat pump, working medium is heated to desorb on an adsorption bed and enters the expansion machine to expand, act and relieve pressure, dead steam discharged from the expansion machine is subjected to heat absorption and evaporation through an evaporator, and low-pressure steam enters the adsorption bed to absorb and discharge heat. Steam discharge temperature of the expansion machine is lower than the environment temperature, steam discharge temperature is lowered and efficiency of a steam power device is improved. Compared with a combined power system formed by organic Rankin steam cycle, the steam power device is higher in system efficiency. Adsorption heat can be utilized to make driving heat source steam, the system is automatically driven without high-temperature driving heat sources, only a single low-level heat source is needed, and cooling, heating and power can be provided at the same time, and the cooling and power combined supply method and device are low in carbon emission and environment friendly.

The invention relates to the technical field of vehicle composite power supply system energy management, in particular to a vehicle composite power supply energy management system which mainly comprises a composite power supply management unit, a fuzzy logic controller and a particle swarm optimization algorithm. The composite power supply management unit is used for collecting operation parameters of the lithium battery and the super capacitor, processing the operation parameters, outputting a state-of-charge value to the fuzzy logic controller, and receiving an output signal of the fuzzy logic controller to control output of the composite power supply. The fuzzy logic controller is used for obtaining a charging and discharging control signal of the super capacitor according to the inputSOC estimated value of the lithium battery, the SOC of the super capacitor and the required power through a logic relationship; the particle swarm optimization algorithm is used for optimizing parameters of a membership function of the fuzzy logic controller. The charging and discharging times of the lithium battery can be effectively reduced, the service life of the lithium battery is prolonged,and the power supply efficiency of the composite power system is improved.

The invention discloses a control method and system for a hydraulic control device of a continuously variable speed transmission of a hybrid power system. A variable speed adjusting device of the continuously variable speed transmission of the hybrid power system is used for changing the rotating speeds of an input shaft and an output shaft which are respectively coupled with a first liquid pump and a second liquid pump by using hydraulic pressure generated by the first liquid pump and the second liquid pump through a hydraulic loop. The control method and system which are disclosed by the invention are matched with an operation mode and state of the hybrid power system to select a series or parallel hydraulic loop so as to effectively control the output of the continuously variable speed transmission. Further, hydraulic pressure of the first liquid pump and the hydraulic pressure of the second liquid pump are controlled and the transmission ratio of the continuously variable speed transmission is controlled, so that input power sources (engines and motors) work in an optimal efficiency area to further reduce consumption of energy sources.

This invention relates to a method for realizing a complex PSS, which adds a fuzzy logic control unit (including a phase plane comparison unit and a logic consequence unit) based on a traditional linear lead-lag PSS, in which, the fuzzy logic control unit is used in modifying the output signal of the traditional linear lead-lag PSS to improve the control result of the PSS to power system power oscillation, both the complex PSS and traditional linear PSS can improve the stability of small harass of the system and stop the system to generate spontaneous power oscillation, and the fuzzy logic control unit can avoid damp control caused by non-linearity of the system to increase the damp control robustness of the traditional PSS.

The invention discloses a double-energy-storage-loop gas-liquid hybrid power system. The system comprises a hydraulic cylinder, a first energy accumulator and a second energy accumulator, wherein thefirst energy accumulator and the second energy accumulator are embedded in a cylinder body of the hydraulic cylinder respectively, a second one-way valve is connected between the first energy accumulator and one port of the hydraulic cylinder, and a seventh two-way valve is connected between the second energy accumulator and the other port of the hydraulic cylinder. The double-energy-storage-loopgas-liquid hybrid power system disclosed by the invention is compact in structure, and the weight and the size of the system are reduced; rapid acceleration and deceleration of an object can be realized; adaptive adjustment can be carried out according to load mass and motion characteristics, the energy utilization efficiency is improved, and the system reliability can be improved.

The invention provides a photovoltaic augmentation type vehicle-mounted composite power supply control system and method. The system comprises a main control unit, a composite power supply system, a solar panel, a state monitoring unit, a composite power supply topology structure, an energy distribution unit and a driving system. The solar panel used to provide energy to the composite power systemand drive system, and can realize a variety of separate energy supply modes through the composite power supply topology; the composite power system for supplying power to the drive system; the statusmonitoring unit monitors the status information of the solar panel and the composite power system and transmits the status information to the main control unit. The main control unit allocates energyto the drive system by receiving state information and controlling the composite power supply topology and the energy distribution unit. As that scheme provide by the invention can fully utilize thesolar energy through the super capacitor, the performance of the composite power supply is taken into account, and the method has the advantages of simple structure, easy realization and low cost.

The invention provides a distributed multi-shaft gas turbine and a hybrid power system. The distributed multi-shaft gas turbine comprises a low-pressure shaft module, a first intercooler module, a high-pressure shaft module, a heat regenerator module, a combustion chamber module and a power turbine driving module which are independent of one another and connected through pipelines, wherein the low-pressure shaft module comprises a low-pressure compressor and a low-pressure turbine, and the low-pressure compressor is coaxially connected with the low-pressure turbine through a bearing; the high-pressure shaft module comprises a high-pressure compressor and a high-pressure turbine, and the high-pressure compressor is coaxially connected with the high-pressure turbine through a bearing; and the power turbine driving module comprises a power turbine and a power output unit, and the power turbine is coaxially connected with the power output unit through a bearing. By means of the distributedmulti-shaft gas turbine, the problem that an existing single-shaft gas turbine is large in design difficulty is solved.

The invention relates to a novel internal combustion truck energy supply system and method coupled with a vehicle air conditioner, and belongs to the field of energy and power. The system is characterized in that the ORC coupled diesel engine energy system waste heat collection is from a first evaporator (5); an organic Rankine cycle subsystem of the system comprises a turbine (19), a low-pressureworking medium pump (20) and a high-pressure working medium pump (18). Compared with an existing related composite power system and method for recycling vehicle smoke waste heat, the system is mainlycharacterized in that the turbine (19) and the low-pressure working medium pump (20) are additionally arranged, so the energy utilization rate is increased, and heat emission is reduced. A telescopicbutterfly valve is adopted, so that backflow is avoided.

The invention discloses a reliability evaluation method for a vehicle-mounted composite power supply based on a Markov chain and a Bayesian network. Firstly, based on the Markov chain theory, established are state transition diagrams when four different topological structural composite power supplies of a cascaded structural composite power supply with a supercapacitor located at an intermediate position, a cascaded structural composite power supply with a storage battery at the intermediate position, a parallel structural composite power supply and a multi-input power converter structural composite power supply break down; secondly, according to the state transition diagrams when the four different topological structural composite power systems break down, a Bayesian network model diagram, which eventually causes failure of the composite power supply, resulting in the system in a paralyzed state, is established based on the Bayesian network theory; finally, according to the established Bayesian network model diagram, the failure rates of the four different topological structural composite power supplies are obtained by calculation, comparative analysis is carried out, and reliability evaluation is further carried out to obtain the composite power supply with the strongest reliability, thereby avoiding trial and error in engineering practice.

A combined power system with externally connected auxiliary power is composed of a first power unit (miniature IC) engine) consisting of a first power equipment, a first drive shaft, an output shaft and a first driver between the first driven shaft and the output shaft, an auxiliary power unit consisting of a motor and its drive shaft parallel to the first driven shaft, and a second driver connected between the first and the second drive shafts.

The invention belongs to the technical field of new energy electric vehicles, and particularly discloses an energy management method and system for a new energy electric vehicle storage battery composite power supply, and the method comprises the following steps: carrying out the research of the overall structure of a new energy electric vehicle storage battery composite power supply system; dividing the module into a plurality of sub-modules for design; super capacitor parameters are selected and optimized according to the actual situation of the electric vehicle, a new energy electric vehicle storage battery composite power system structure is built, and software and hardware design of a control system is carried out; and establishing a mathematical model of the composite power supply system, designing an energy management method of the composite power supply system, performing optimization, and determining a final energy management method of the composite power supply system. The scheme improves the energy utilization rate of the hybrid power supply. The storage battery can be protected, the driving range of the electric vehicle can be increased, and early-stage preparation work is made for the hybrid power supply new energy electric vehicle to go to the market.