1616 results about "Diesel generator" patented technology

Disclosed is a method and system for providing constant critical AC electrical load with primary, secondary, and in some cases a tertiary source of power with higher reliability and lower operating and capital costs and lower emissions than the traditional utility supply, uninterruptible power supply (UPS), and battery primary power source, and diesel generator back-up systems that are predominately used today. Specifically, the disclosed system utilizes on-site power generation to provide primary power and includes full utility and UPS/DC storage back-up systems.

The invention belongs to the technical field of distributed power generation microgrid systems in power systems and relates to a wind-solar-diesel storage isolated microgrid system which comprises a lead-acid battery, one group or multiple groups of photovoltaic battery arrays, a fan, a diesel generator, a microgrid monitoring sub-system, a controllable load and an uncontrollable load, wherein the fan comprises more than one wind turbine generator or more than one group of wind turbine generator set, the lead-acid battery and the photovoltaic battery arrays are merged into a direct current bus bar through all front-stage two-way DC (direct current)/DC converters and connected into an alternating current bus bar through a two-way DC/AC (alternating current) inverter, the diesel generator is merged into the direct current bus bar through an AC/DC current converter, the wind turbine generator set is connected into the alternating current bus bar through an AC/DC/AC converter, the microgrid monitoring sub-system is used for controlling voltage and the frequency in a microgrid to be stable. The invention simultaneously provides a coordinated operation control method for the system. Thewind-solar-diesel storage isolated microgrid system has stronger robustness and flexibility, and can meet the long-term high-efficient stable operation requirement of the isolated microgrid system.

The invention discloses an alternating current and direct current hybrid micro-grid system and a control strategy of the micro-grid system. The micro-grid system comprises multiple generation units, load, a distribution line for connecting the generation units and the loads, and a monitoring protection unit; each generation unit comprises a large power grid, grid-connected AC/DC (alternating current/direct current) of the large power grid, an energy storage system, a DC/DC (direct current/direct current) converter of the energy storage system, a wind power generation system, an AC/DC converter of the wind power generation system, a photovoltaic power generation system, a DC/DC converter of the photovoltaic power generation system, and a diesel generator; said load includes AC non-significant load, AC significant load, AC/DC load, DC significant load and DC non-significant load; the distribution line comprises a DC distribution line and an AC distribution line; the operating status of each energy conversion device can be monitored in real time by the monitoring protection unit, two operating ways such as grid connection and isolation of the system can be realized by different control strategies, the distributive generation unit and the energy storage unit realize coordination and cooperation by controlling energy storage DC/DC, photovoltaic DC/DC, and wind power AC/DC, so that the power supply reliability is improved and the significant load can continuously operate.

The invention discloses an optimizing method of an independent microgrid system which comprises diesel generators, a wind driven generator, a photovoltaic array and an energy storage battery. The optimizing method specifically comprises the steps of: considering a coordination control strategy among a combined starting mode of multiple diesel generators, the energy storage battery and the diesel generators on an optimizing plan designing model by an independent microgrid system-based multi-target optimizing design model to ensure that the utilization rate of renewable energy resources in the independent microgrid system is higher and the independent microgrid system is more economic and more environment-friendly in operation; aiming at the stability of the optimizing plant designing model of the system, considering the standby capacity of the stability demand of the independent microgrid system; and carrying out multi-target problem solving by adopting an NSGA-II (Nondominated Sorting Genetic Algorithm II)-based multi-target genetic algorithm on the basis of a solving algorithm of the optimizing plant design model so as to realize multi-target optimization of economy, reliability and environment friendliness of the independent microgrid system.

The invention relates to a micro-grid system, and in particular relates to a micro-grid system for ships. The micro-grid system for the ships comprises a solar photovoltaic power generation system, a wind power generation system, a storage battery energy storage system, an emergency diesel generator, a load, a direct current bus and an alternative current bus, wherein the direct current bus and the alternative current bus are connected together through a bidirectional converter; the direct current bus is connected with the solar photovoltaic power generation system and the storage battery energy storage system; the alternative current bus is respectively connected with the wind power generation system, the emergency diesel generator and the load; and the system is connected with a medium voltage main power grid in the ship through an interconnection switch and a transformer at side where the alternative current bus is positioned. The defect that the new energy distributed type power generation cannot be directly used in a ship power system is overcome, a new offshore energy resource is sufficiently utilized, and the energy conservation and the emission reduction in the field of ocean transportation are realized.

The invention provides a method for micro-grid system coordinated control based on multi-element composite energy storage. The method includes the steps that a flywheel energy storage unit is additionally arranged so that output fluctuation of voltage can be restrained; when a micro-grid system is in grid-connected operation, a battery energy storage unit and the flywheel energy storage unit restrain output fluctuation of a distributed generation unit; when the micro-grid system is in off-grid operation, the battery energy storage unit and a diesel generator alternately serve as a main power source of the micro-grid system; when grid-connected operation and off-grid operation of the micro-grid system are switched, the flywheel energy storage unit and the diesel generator provide power support. Through the method, the use rate of renewable energy sources is improved, optimal operation of power grids is achieved, instant high-power fluctuation and long time scale fluctuation of photovoltaic output are restrained, each distributed generation device is controlled in a coordinated mode, and timely, accurate and rapid coordination action of the devices can be guaranteed.

The invention discloses a test platform for a ship propulsion system, which comprises two high speed diesel engines, two-in two-out type parallel operation gear boxes, an axle motor provided with two operating modes of PTO/PTI, a conventional diesel generator set, a propeller simulation device, a power consumption device and a control device, wherein the two high speed diesel engines are respectively connected with the axle motor and the propeller simulation device through the parallel operation gear boxes, and respectively connected with the parallel operation gear boxes through a flexible transmission device; and the parallel operation gear boxes are respectively connected with the axle motor and the propeller simulation device through a hydro-viscous driver clutch and a low-speed high-torque elastic coupling device. The invention is a comprehensive multifunctional test platform for the ship propulsion system, so that the invention can be used for conducting the test research on integrated key technologies of the ship propulsion system, and the test verification of axle reversible motors, diesel engines and devices thereof, power station and energy management, system vibration decreasing and noise reduction, driving elements, electric propulsion, automatic control and other aspects.

The invention discloses an intelligent fruit and vegetable controlled atmosphere carrier vehicle, which comprises a headstock, a chassis, an airtight box and a human-computer interaction interface, and also comprises a control system, an air exchange device, a signal acquisition system, a ventilation system, a liquid nitrogen controlled atmosphere system, a humidifying system, a solar charging system, a temperature control unit, a diesel generator and a dampproof device, wherein the chassis is respectively connected with the headstock and the airtight box; the control system is respectively connected with the human-computer interaction interface, the air exchange device, the signal acquisition system, the ventilation system, the liquid nitrogen controlled atmosphere system, a humidifying system, the temperature control unit and the diesel generator; and the diesel generator is respectively connected with the control system, the ventilation system, the humidifying system, and the temperature control unit. The invention also discloses a method for implementing the carrier vehicle. The intelligent fruit and vegetable controlled atmosphere carrier vehicle and the method have the advantages of making the fruit and vegetable fresh-keeping environment more uniform, improving the quality of the fruit and vegetables, prolonging the fruit and vegetable fresh-keeping period and the like.

The invention discloses a microgrid multi-time scale self-adaption energy dispatching method under a source-grid-load interaction mode. The invention starts from the aspect of microgrid multi-time scale optimal management, and provides a self-adaption energy management method comprising basic day conventional dispatching and control day rolling dispatching. According to the method, labor is contributed for an energy storage device and a diesel generator according to a global object function and a global constraint condition, active power consumption of power and controllable and respectable load interactive with a large power grid is optimized, and the magnitude of the contributed labor can be predicted according to wind power and photovoltaic power generation systems, self-adaption adjustment for energy storage SOC penalty factors and control day rolling optimization time duration is realized, the influence of the error of the contributed labor predicted by the wind power and photovoltaic power generation systems on microgrid energy management is reduced, and economic and environmentally-friendly coordinated operation of a microgrid is realized.

The invention relates to a microgrid optimization method based on an improved binary system particle swarm optimization algorithm. For a microgrid containing various micro power sources, taking start-stop strategies of controllable micro power sources into account, a microgrid optimization operation mathematical model considering economic costs and environmental benefits is established. An improved binary system particle swarm optimization algorithm based on a catfish effect is provided, output of the micro power sources in the microgrid in each period of time is solved under different control strategies. A specific microgrid including wind, light, a micro gas turbine, a fuel cell and a diesel generator is used as an embodiment, and embodiment analysis is performed.

The invention discloses a cabin entry process for a main diesel generating set of a 50,000-ton semi-submerged ship. The cabin entry process comprises the following steps of: 1) selecting a cabin entry position and entering from a sectional folding port; 2) determining a cabin entry mode and horizontally pulling in by using a tool; 3) preparing for a cabin entry condition of the main diesel generating set; 4) preparing for cabin entry of the main diesel generating set, and arranging a rail, wherein two strips of sectional transverse H-shaped steel are arranged on the two sides of the rail; 5) lifting the main diesel generating set by using a gantry crane; 6) connecting a hoist, slowly pulling the main diesel generating set into a cabin by using the hoist, and checking a folding condition of a host pedestal and the rail at any time to prevent paint on a base of the main diesel generating set from being scratched; and 7) dragging the main diesel generating set out of the rail when completely reaching a preset mounting position. By the cabin entry process, the disassembly work of a cabin structure and pipe outfitting can be reduced, safe and high-efficiency cabin entry and completeness of the structure and the outfitting are guaranteed, and the workload is reduced.

The invention discloses a diesel generator emergent stop electromagnetic valve loop failure warning circuit. The warning circuit consists of a stop power supply, a spare power supply, a first current type relay normally closed contact, a second current type relay normally open contact, a second current type relay normally closed contact, a third current type relay normally open contact, a voltage type relay coil, a first current type relay coil, a second current type relay coil, a third current type relay coil, an emergent stop electromagnetic valve, a spare electromagnetic valve, a diesel generator, an AC/DC module, a voltage type relay normally closed contact, a first warning lamp and a second warning lamp. The warning circuit is simple, and can respectively perform the warning and timely self-protection for the failure of the stop power supply of an emergent stop electromagnetic valve loop and the failure of the emergent stop electromagnetic valve. The invention further discloses a diesel generator emergent stop electromagnetic valve loop failure warning method; and different failure problems are respectively warned through different warning lamp lightening modes.

The invention relates to a distributed generation intelligent monitoring system. The intelligent monitoring system can predict the generated power of a photovoltaic module and a wind power module of distributed generation, and the changes of loads and implement the optimal control strategy on the basis of the energy storage conditions of a storage battery module, the running conditions of a diesel generator and the running conditions of a power distribution network, wherein the storage conditions of the storage battery module and the running conditions of the diesel generator are detected in real time, and the running conditions of the power distribution network are obtained in real time.

The invention discloses an optimization programming and evaluation method of a micro-grid power supply. Under grid connection and island operation modes, a mathematical model of distributed power supply optimization programming in a microgrid is established respectively. Constraint conditions of diesel generator starting and operation are considered so that optimization configuration of scientific wind power, photovoltaic and fuel cells, a diesel generator and an energy storage capacity is acquired. A heredity and particle swarm algorithm is used to carry out optimization programming on the power supply in the microgrid. A programming scheme evaluation method including a stable power supply duty ratio, total investment, a time-shifting electric quantity of energy storage, power supply capacity adequacy and longest running time of the diesel generator is established. Correctness of a programming method and rationality of a programming result are guaranteed.

A method and system are provided. The method includes synchronously reconnecting a microgrid to a main grid after islanding of the microgrid. The synchronously reconnecting step includes calculating a phase angle difference between synchrophasor measurements collected from a common coupling on the main grid and synchrophasor measurements collected from a common coupling on the microgrid. The synchronously reconnecting step further includes calculating, by a controller, a frequency reference deviation based on the phase angle difference. The synchronously reconnecting step also includes adjusting a frequency of the diesel generator based on the frequency reference deviation.

The invention discloses a dynamic economic dispatch optimization method for an independent power grid containing intermittent energy. The minimum running cost of a system and the optimal output power of each distributed generation unit in each period are solved effectively by introducing power balance, system spare capacity, unit output, unit start-stop shortest time and other constraints into dynamic economic dispatch and based on an optimization objective function of active power distribution between distributed power supplies and an energy storage system and according to random fluctuation change of system load and wind power under different conditions. An independent power grid dynamic dispatch strategy based on interactive collaboration between a battery energy storage system and a diesel generator set is proposed. The optimal economic operation power range of the diesel generator set and the base point of collaborative dispatch between the diesel generator set and the battery energy storage system are given. The accuracy and efficiency of system economic dispatch optimization are greatly improved in a limited dispatch time period. The minimization of total operating cost of the optimization goal on the basis of stable and reliable operation of the system is ensured.

The invention provides a system and method for fault prediction and on-line evaluation of health state of marine diesel generator, which includes a shell, a displayer, an alertor, a power supply and adata processing device, wherein the data processing device include a deep learning integration module, a full life cycle history database, and a fault multimodal expert system database. The deep learning integration module utilizes an integrated learning method, and includes multiple supervised and unsupervised deep learning network models. The fault multimodal expert system database includes allfault feature databases and corresponding fault category labels, and also comprises a memory, a GPU, a CPU, an external device control interface, a data acquisition module and a wireless signal transceiving device, and realizes automatic monitoring and evaluation of an equipment. The system has the advantages of more accurate and convenient fault prediction, state on-line monitoring and the health evaluation.

The invention discloses a ship electric propulsion system with hybrid power supply of a diesel generator set and a power battery. The system comprises a ship control system, a power system, a distribution board and an electric propulsion system, wherein a power management controller and a propulsion manipulation controller are arranged in the ship control system; the power system is connected with the electric propulsion system through the distribution board; the power system and the distribution board are connected with the power management controller respectively; and the electric propulsion system is connected with the propulsion manipulation controller. A shore power distribution box, a diesel generator set and a power battery pack are arranged in the power system; a frequency converter is arranged in the electric propulsion system and connected with a propulsion motor; the propulsion motor is connected with a propeller; a busbar is arranged in the distribution board and provided with a main switch and a load switch; the main switch is connected with the generator set; and the load switch is connected with the frequency converter. By adopting the hybrid power supply mode of diesel generator set and power battery, the safe sailing of the ship is ensured, and the continuation performance of the ship is improved.

The invention relates to an electric-traction rack rail railcar. By successfully developing the electric-traction rack rail railcar, the contradiction between the rapid development of coal mining, shoring and heading equipment and underdeveloped underground coal mine subsidiary transportation equipment in China is alleviated, and the updating and upgrading of coal mine equipment in China are maximally promoted. The electric-traction rack rail railcar comprises rails and standers, wherein a cab, an anti-explosion diesel generator, an anti-explosion variable frequency motor, a three-stage gear reducer, an electric control tank, and a guiding and anti-rollover steering frame are arranged on the standers. The electric-traction rack rail railcar has the beneficial effects that the whole vehicle is electrically and mechanically driven and is powered by the vehicle-mounted anti-explosion diesel generator, and a low-speed large-torque driving manner can be realized by virtue of the anti-explosion variable frequency motor and the three-stage gear reducer; by utilizing the anti-explosion variable frequency motor, the emergency braking, the driving braking, parking braking and the like of the railcar are realized by virtue of the coordinate operation of a variable-frequency governor and a braking system; the guiding and anti-rollover steering frame with a guiding wheel can play guiding and anti-rollover roles; the electric-traction rack rail railcar is environment-friendly, safe and efficient and has an automatic function.

The invention provides an integrated auxiliary energy supply system for a wind and solar generator, which comprises a solar battery array (1), a wind power generating set (2), a diesel generator (4), a storage battery (5), an auxiliary energy management system (3), an inverter system (6) which changes DC into AC, and a DC transformer system (7), wherein, electric energy output by the solar battery array (1), the wind power generating set (2) and the diesel generator (4) can be supplemented mutually by the auxiliary energy management system (3) for realizing priority use of solar energy and wind energy and stable supply of auxiliary energy, which can utilize the recyclable green energy such as the solar energy and the wind energy maximally, reduce fuel oil consumption and carbon emission, and realize energy supplement by the diesel generator under a windless and lightless severe generation condition so as to guarantee reliability for auxiliary energy supply.

The invention discloses an electric propulsion system for hybrid power boats and an implementation method thereof, wherein the electric propulsion system is suitable for inland river medium and small-sized river boats and comprises a power battery used as a system main power supply and a diesel generator set used as an auxiliary power supply. When a boat berths alongside and suspends shipping services, the power battery is charged by a shore power so as to store electric energy; when the boat sails normally, the electric propulsion system is powered by the power battery; when the stored electric energy of the power battery are completely consumed or the power battery goes wrong in the process of sailing, the auxiliary diesel generator set automatically starts and puts into operation so as to continue to supply power for the electric propulsion system to maintain the sailing of the boat; and in emergency, the power battery and the diesel generator set work together to supply power for the electric propulsion system so as to ensure the sailing safety of the boat. By using the system and the implementation method of the system disclosed by the invention, boats can realize zero discharge of waste gas/water, and remarkable effects of energy saving and expenditure cutting are generated; meanwhile, the hybrid power supply mode of the power battery and the diesel generator set ensures the sailing safety of a boat and improves the duration performance of the boat.

The invention discloses a multi-objective optimizing design method of an off-grid hybrid renewable energy system. According to the method, the illumination, the wind speed, the temperature and other meteorological data of a certain region are considered, the annual cost of the hybrid renewable energy system and the power supply defect rate minimization serve as objectives, and a double-objective optimization model with constraints and suitable for the hybrid renewable energy system is built, so that the number of photovoltaic panels and the mounting inclination angle, the number of wind turbines and the mounting height and the number of energy storage devices and diesel generators for forming the optimizing configuration of the system can be obtained. The model is solved through an evolved multi-objective optimizing algorithm NSGAII, and a set of Pareto optimal solutions is obtained; finally the final implementation scheme is determined according to the reference information of the decision maker. HRES planning is conducted through the multi-objective optimizing method, and the method more accords with actual situations and is higher in feasibility.

The invention relates to a diesel generator control apparatus and specifically relates to a diesel generator parallel control apparatus, for solving the defects and problems generated when a conventional diesel generator controller employs a distributed control mode to acquire and control multiple diesel generators by use of one controller. According to the diesel generator parallel control apparatus, each controller individually controls one diesel generator, and each controller employs a control mode of a bus structure. One onsite bus communication module and one phase detection module are additionally arranged on the basis of conventional controller hardware. In terms of software, a set starts by use of a fault rearrangement method, distributes power equally according to a power distribution algorithm during power distribution and employs both a set load shutdown mode and a power restoration shutdown mode during a shutdown, when a circuit breaker between the diesel generators and a diesel generator bus is open or closed, it should be confirmed that the controllers are at normal working states, and a circuit breaker between a power network and a load employs an independent execution module. Great convenience is provided for capacity increase or capacity reduction of a system.