83 results about "Gross generation" patented technology

The invention provides an efficient photovoltaic power generation system, which comprises DC/DC modules, an inverter and at least two serial strings which are mutually in parallel connection, wherein each serial string is connected with one DC/DC module; the two input ends of each DC/DC module are respectively connected to the positive pole and the negative pole of a bus; the two output ends of each DC/DC module are respectively connected with the bus and the corresponding serial string or are connected with the bus through the corresponding serial string; when the bus voltage V is inconsistent with voltage Vn corresponding to the maximum power point of any of the serial strings, the offset voltage Delta Vn is output by the DC/DC module corresponding to the serial string, so that each serial string works at the maximum power point, wherein the offset voltage Delta Vn equals to the difference value of V and Vn. Through the method that each serial string is in series connection with the corresponding DC/DC module, so that voltage compensation can be performed on each serial string, all the serial strings work at the maximum power points during operation and the gross generation of the photovoltaic power generation system is improved by 3% to 5%.

Methods and software for managing electric power networks in a distributed manner. A supply and demand balancing scheme is used across a network of agents to facilitate agreement on the optimal incremental price for energy provision in an electric power network subject to the constraint that the total generation in the electric power network matches the total network demand. A multi-step optimization approach is provided that incorporates inter-temporal constraints, allowing for optimal integration of flexible power loads and power storage entities and taking into account power generation ramp rate constraints at individual generation entities. The approach is extended to cope with line flow constraints imposed by the physical system topology and transmission line limits/capacities.

The invention belongs to the field of electric system micro-grids and relates to a capacity allocation optimization method for an island/offshore platform independent new energy resource micro-grid. The method includes the steps that the annual load hour average power of the island/offshore platform is acquired through actual measurement or estimation; local annual natural condition hour average data are acquired from a meteorological department; the annual predicated generation power of each power generation device per unit capacity is calculated; the number of all power generation devices and the number of all energy storage devices are initialized; the gross generation of all the power generation devices and the total power consumption of loads in the time period are calculated; the annual load power shortage ratio and energy surplus ratio are calculated. According to the method, correction factors for influence of special natural conditions on system parameters and correction factors for influence of special geographical conditions on cost are adopted, the ocean power generation devices and diesel engines are additionally arranged, and therefore the micro-grid can provide electric power better through renewable energy sources and the power supply reliability of the system is improved as well.

The present invention relates to a solar photovoltaic cell power generating capacity prediction system and a method, wherein the method comprises the steps of: collecting temperature and light intensity data at a plurality of moments of a plurality of days before a day to be predicted, recording the data as a history data, calculating temperatures and light intensities at a plurality of moments of the day to be predicted according to the history data, calculating powers at a plurality of moments of the day to be predicted, and calculating a total generating capacity of the day to be predicted. The system and the method realize the prediction of the power and the total generating capacity at a plurality of moments of the day to be predicted, and enable users to schedule the working time ofelectric appliances reasonably, thereby realizing maximum utilization of the solar energy and decrease of the electricity cost.

The invention provides a solar energy sun-following device structure. An east-west driving shaft body of the solar energy sun-following device structure is in a cross connection with a north-south driving shaft body; a first driving piece arranged on an east-west shaft sleeve piece of the east-west driving shaft body is actuated to enable the north-south driving shaft body to generate east-west pivotal rotation, while a second driving piece arranged on the north-south driving shaft body is actuated to drive an east-west driving shaft piece of the east-west driving shaft body to generate south-north pivotal rotation relative to the east-west shaft sleeve piece and is linked with a cable-stayed combined annular frame body which is connected with the end of the east-west driving shaft piece, and simultaneously drives a carrier frame set connected with the cable-stayed combined annular frame to generate east-west and north-south actuation, so that a solar energy receiving module of the carrier frame set can receive solar energy by following the sun. As the volume of a base body occupies a large area, the periphery of the base body can be used for realizing subsidiary functions of parking, charging of electric vehicles and the like so that the functions of gross generation improvement and excellent use function are realized.

The invention relates to a startup control method and a device for a photovoltaic inverter. The startup control method comprises the following steps of voltage detection: executing a startup judgment step if detecting that open-circuit voltage of a photovoltaic cell is greater than a startup voltage threshold; startup judgment: transmitting a startup signal to the photovoltaic inverter, judging whether startup is successful, executing a voltage increasing step if not, and executing a voltage saving step if so; voltage increasing: adding a preset voltage step value based on the current startup voltage threshold and transmitting to the voltage detection step for re-detection; and voltage saving: saving the current startup voltage threshold for next startup of the photovoltaic inverter. According to the method and the device, the optimal startup voltage threshold of the photovoltaic inverter is searched automatically, the repeated startup can be avoided, and a system can operate as soon as possible during the next startup, so that the gross generation of the system is increased.

The invention discloses a maintenance cost calculation and maintenance scheduling method and a system for an offshore wind farm. The calculation method comprises a step of wind power loss cost calculation. The step of wind power loss cost calculation comprises sub steps: according to a designed wind speed power curve of a fan, a standard generation model of the fan is generated; wind speed prediction data in a preset time period are acquired; according to the wind speed prediction data and the standard generation model, the standard total generation amount of the to-be-maintained fan in the preset time period is calculated; the fan maintenance time period in the preset time period is acquired, and the actual total generation amount is calculated; and the wind power loss cost in the preset time period is calculated and outputted, wherein the wind power loss cost=(the standard total generation amount-the actual total generation amount)*unit electricity cost. A standard for evaluating the maintenance scheduling scheme is provided, and the reasonableness of the evaluation standard is greatly improved. On the premise of meeting maintenance scheduling requirements, the maintenance cost is controlled to be the lowest.

The invention discloses an offshore wind power plant generating capacity calculating method comprising the following steps: wind measurement data is collected, sea surface roughness is solved, a Richardson number method is used for solving a Richardson number and determining heat stability of an offshore wind power plant, Monin length is solved, and wind speed data is solved after a wind contour model is corrected; a Jensen wake flow model is corrected and constants in different corresponding wake flow dissipation coefficients are assigned to different heat stability of the offshore wind power plant, speed of wind in front of wind wheels of a downstream machine unit under influence of wake flows of a single machine unit is solved, speed of wind in front of the wind wheels of the downstream machine unit under influence of wake flows of a plurality of machine units is solved, output power of the single machine unit under conditions of different heat stability of the offshore wind power plant is solved, annual total power generation quantities of the single machine unit under conditions of different heat stability of the offshore wind power plant are respectively calculated, and annual total power generation quantities of the offshore wind power plant are calculated. Difference of wind energy distribution in different zones and different time in the offshore wind power plant is fully considered, and power generation quantities of the offshore wind power plant can be quickly and accurately calculated.

The invention discloses a method for evaluating power generation insurance pricing for photovoltaic power stations. The method includes acquiring relevant indexes of monthly gross power generation, installed capacity, regions and the like of the photovoltaic power stations in a certain period and classifying the relevant indexes; acquiring monthly full-generation hours according to the gross powergeneration and the installed capacity, accumulating the monthly full-generation hours and calculating the sums of the monthly full-generation hours; normalizing and indexing the sums; computing fluctuation ratios and relevant fluctuation parameters of monthly power generation of each category of power stations to obtain the fluctuation ratios and the relevant fluctuation parameters of the monthlypower generation of a certain category of power stations and gross full-generation hour distribution of a certain period; determining pricing for the power stations according to the distribution. Themethod has the advantages that distribution of power generation of target power stations in future medium and long terms can be quickly and accurately estimated by the aid of the method, risks and values of the power stations can be accurately measured, and accordingly reference bases can be provided for insurance pricing and earning prediction for the photovoltaic power stations.

The invention provides a design and optimization system and method for a trough type solar thermal power station, and belongs to the technical field of solar thermal power stations. The system comprises a light resource acquisition module, a light field arrangement module, an energy storage selection and power generation computation module, a generation capacity acquisition module and an optimization design module, wherein the light resource acquisition module is used for forming a basic data base; the light field arrangement module is used for acquiring initial light field arrangement; the energy storage selection and power generation computation module is used for acquiring energy storage capacity and storage tank diameter so as to select energy storage equipment and acquiring power station hourly theoretical output power; the generation capacity acquisition module is used for acquiring power station hourly actual output power and annual total generation capacity; the optimization design module is used for adjusting sun multiples set in the light field arrangement module and energy storage time set in the energy storage selection and power generation computation module and selecting final light field arrangement according to each annual total generation capacity. According to the system and the method, light field arrangement can be performed automatically, arrangement results and selection of thermoelectric equipment can be optimized, and hourly on-grid energy of the power station can be accurately computed.

The invention discloses a generation scheduling error electricity quantity distribution method based on a load rate adjustment direction. The method comprises the following steps: suggested load ratescorresponding to various power plants are acquired; the total electricity generation quantity of all the power plants is calculated according to the suggested load rates corresponding to the variouspower plants; the total electricity generation quantity is subjected to first-round electricity quantity distribution according to the suggested load rates corresponding to the various power plants; the remaining error electricity quantity of the total electricity generation quantity after first-round electricity quantity distribution is counted; and the error electricity quantity is subjected tosecond-round electricity quantity distribution according to the suggested load rates corresponding to the various power plants. The invention further provides a generation scheduling error electricityquantity distribution device based on the load rate adjustment direction, terminal equipment and a storage medium. The error electricity quantity is reasonably distributed, the planning electricity generation quantities of the various power plants are promoted to be achieved in a balanced mode, and then the coordination and balance that a power grid scheduling mechanism arranges the various powerplants to execute the contract electricity quantities are improved.

The invention discloses an evaluation method for analyzing photovoltaic power generation project income based on user power utilization characteristics, which comprises the following steps: selectinga calculation area, calculating the sunshine time, weather conditions and temperature of the area, and evaluating the photovoltaic power generation amount; Acquiring real-time power consumption data of users in the region, performing clustering analysis on the users with different power consumption characteristics, and classifying all the users with different power consumption characteristics intocategories with different peak-average-valley time periods; Wherein the peak flat valley time period refers to a peak time period, a flat time period and a valley time period; Analyzing the photovoltaic power generation amount and the power consumption amount of each type of users in the peak-average-valley time period, and calculating the annual photovoltaic power generation self-use proportionof each type of users; According to the annual photovoltaic power generation self-use proportion of various users, the electric charge saved in the photovoltaic power generation state, the grid-connected electric quantity income and the total power generation amount subsidy are calculated, the total photovoltaic power generation income is obtained, and a basis is provided for the client to investa photovoltaic power station.

The invention discloses a power generation system with partial oxygen-enriched combustion combined with a calcium-based chain and a CO2 capturing method. Through a partial oxygen-enriched method in which a mixture of air, oxygen and recycled flue gas serves as a combustion improver, the CO2 gas concentration of flue gas of a boiler outlet is increased to 30%-60%, the flue gas enters a chemical chain combustion post-capturing device based on a calcium base, the calcium-based reactivity is greatly improved, the CO2 capturing efficiency reaches 95% or above, and the gross generation is increased.According to the power generation system, the oxygen generation cost, the carbon carrier cost, energy consumption and the CO2 capturing efficiency are all balanced, so that the comprehensive efficiency is the optimized, two advanced carbon capturing techniques of partial oxygen-enriched combustion and the calcium-based chemical chain are combined, and the power generation system and the CO2 capturing method have the advantages of good economical efficiency, simple process, low energy consumption, high carbon capturing efficiency and the like.

The invention discloses a bubbling fluidized bed type O2/H20 pressurized oxygen-enriched combustion system. According to the integral system, the entire process from air separation for oxygen, boiler combustion and heat exchange to CO2 capture is carried out with the high pressure maintained at 6 to 8 MPa, and compared with a traditional oxygen-enriched combustion technology, the system has the advantage that the compression energy consumption and depressurization loss are greatly reduced; a steam regulating system is utilized for replacing a gas recirculation system, a lot of vaporization latent heat is absorbed during water vaporization, and the temperature regulation ability is relatively strong, so that under the same condition, the flue gas amount is lower, and compared with O2/CO2 circulation, the system has the advantage that the energy consumption and waste heat loss of a fan can be greatly reduced; besides, the combustion temperature of a bubbling fluidized bed is relatively low, so that the generation amount of NOx can be effectively decreased; and a pressurized O2/H20 oxygen-enriched combustion technology is adopted, so that the vaporization latent heat of vapor can be utilized, the energy consumption and waste heat loss of the fan can be greatly reduced, and compared with a normal pressure O2/H20 oxygen-enriched combustion technology, the pressurized O2/H20 oxygen-enriched combustion technology has the advantage that the gross generation power is increased by about 7% and is quite considerable.

The invention discloses a comprehensive quality evaluation technology for a grid-connected photovoltaic (PV) power generation system. The evaluation process includes the following steps: the total solar irradiation H incident on a PV array surface of the grid-connected PV power generation system is measured and calculated; the total solar irradiation energy E received by the grid-connected PV power generation system is calculated based on the area A of PV modules applied in the grid-connected PV power generation system, the number N of the applied modules, and the module declared efficiency [mu]STC, and the theoretical gross generation WDC (direct current) of the grid-connected PV power generation system is further obtained; monitoring statistics of the gross generation WAC (alternate current) of the grid-connected side of the grid-connected PV power generation system is carried out; the comprehensive quality evaluation coefficient of the grid-connected PV power generation system is calculated based on a formula, i.e. comprehensive quality evaluation coefficient R=actual gross generation WAC of the grid-connected PV power generation system/theoretical gross generation WDC of the grid-connected PV power generation system*100%. The comprehensive quality evaluation technology for the grid-connected PV power generation system has the advantage of easiness in calculation and operation as well as high practicability, thereby achieving the worthiness for wide popularization.

The invention discloses a household solar power generation storage management system, which is characterized in that a clean energy module can charge an energy storage module, the energy storage module comprises a main energy storage module and a standby energy storage module, is used for storing solar energy or charging and storing energy from a mains supply power grid, and can supply power to household equipment, and when the clean energy module works and the output power is greater than a threshold value, the clean energy module preferentially charges the main energy storage module, the main energy storage module does not supply power to the outside at the moment, and charging is stopped until the electric energy stored by the main energy storage module reaches a specified value. According to the energy storage management system, the combination of the main energy storage module and the standby energy storage module is adopted, the stability of the system can be greatly improved, and the scene of secondary recycling of the power lithium battery can be well met; and the algorithm is adopted to predict the next-day total generating capacity, the battery is maintained in a reasonable energy interval as far as possible, aging can be effectively delayed, the service life of the battery is prolonged, and the use cost is reduced.

The invention discloses a heat economy index analysis method for a distributed natural gas energy station in the running time. The heat economy index analysis method comprises the steps of collecting typical day meteorological data of a corresponding project location in twelve months each year of specific years, and determining the meteorological parameters of the typical days; determining the cooling and heating loads of the distributed natural gas energy station unit when being typical at the typical day of each month of the whole year, and determining the physical property parameters of natural gas; working out output and efficiencyof the unit under various meteorological conditions according to the meteorological parameters corresponding to the running time of the unit; working out the total output and total fuel consumption of the variable load running time of the unit when being typical at the typical days; working out the total fuel consumption and gross generation of the whole year according to the running mode of the unit; and working out the annual heat economy index and thermoelectricity cost allocation index of the distributed natural gas energy station. According to the heat economy index analysis method, the thermoelectricity cooling loads of the designed unit are optimally matched with the user demand characteristics, and high energy utilization rate can be achieved.

The invention relates to a multi-energy capacity optimal configuration method for a wind-solar-water-fire storage system, and the method comprises the steps: taking the minimum cost, the minimum load power shortage rate and the maximum total wind-solar power generation as targets, and building three corresponding sub-targets respectively; respectively carrying out min-max normalization processing on the three sub-targets, and then carrying out linear weighted summation to obtain a single target function; based on the multi-energy complementary characteristics, a preset operation strategy, a preset constraint condition and a single objective function, constructing a multi-energy capacity optimal configuration model; and on the premise that the total hydroelectric capacity is fixed, searching and solving the optimal number of fans, the optimal number of photovoltaic arrays, the optimal number of thermal power generating units and the optimal number of energy storage batteries through a genetic algorithm to be used for calculating the minimum value and the maximum value of each sub-target. According to the method, more types of power supplies are involved, more targets are comprehensively considered, the analysis and calculation of the maximum value and the minimum value of each sub-target are simplified by utilizing the genetic algorithm, and the calculation efficiency of the whole optimal configuration process is improved.

The invention discloses a distribution network black start auxiliary service pricing method considering DG power generation volatility. predicting the generating capacity of each distributed power supply in an area during 24 days of a day, and obtaining the total generating capacity of an area power supply under each period after taking a power supply cluster in the area as the area power supply through the minimum path; establishing a load recovery sequence optimization model, and solving the recovery sequence of each load under each period; taking the expectation maximization of the total compensation cost of black start auxiliary service finally obtained by a power generation side as a target, establishing a black start auxiliary service signing time optimization model, and making the best black start service scheme between the power generation side and a user; performing sharing on capacity compensation cost according to the black start capacity on the same day of each distributedpower supply in the area after calculating the black start auxiliary service total compensation cost obtained by the power generation side on the same day; and performing sharing on using compensationcost according to the current output level of each distributed power supply when black start is performed according to reality. The method can guarantee the fairness of the compensation for the costsof black start auxiliary service provided by each distributed power supply.

The invention relates to an uninterruptible power supply method and device of a hydrogen fuel cell and the hydrogen fuel cell. The method comprises the steps of acquiring the total power generation amount of the hydrogen fuel cell and the real-time power of a load end connected with the hydrogen fuel cell; determining the remaining power generation time of the hydrogen fuel cell according to the total power generation amount and the real-time power; obtaining hydrogenation time required for filling a hydrogen storage system of the hydrogen fuel cell with hydrogen, wherein the hydrogenation time and the remaining power generation time are enabled to meet the condition that the hydrogenation time is less than the remaining power generation time minus a preset threshold value so as to ensurethat the hydrogen fuel cell can supply power uninterruptedly. The hydrogen fuel cell can supply power to a load uninterruptedly under the condition that the power of the load changes in real time.

The invention provides a concentration type solar photoelectric and photo-thermal integrated comprehensive utilization system comprising one or more photovoltaic generation subsystems, one or more photo-thermal heat collection and utilization subsystems, one or more concentration subsystems and an intelligent control subsystem. According to the concentration type solar photoelectric and photo-thermal integrated comprehensive utilization system, the photoelectric technology and the photo-thermal technology in the solar energy application technology are comprehensively utilized, the rate of comprehensive rate of solar energy is increased by over 50%, the unit area generating capacity of photovoltaic wafers is increased by 5-120 times through the concentration design, the solar tracking technology is utilized, the stability and the continuity of equipment are guaranteed, the gross generation is increased by 15% to 30%, the equipment investment cost is greatly reduced, and miniaturization, mobilization and intelligentization are achieved in the aspects of design and application of the solar utilization equipment.

The invention discloses an off-grid photovoltaic system load management method and system. The off-grid photovoltaic system load management method includes the steps: obtaining the daily generating capacity of a solar photovoltaic cell in the past N days, and the solar radiation intensity proportion ratio of the past N days and the future N days; determining the daily generating capacity of the solar photovoltaic cell in the future N days according to the generating capacity in the past N days and the solar radiation intensity proportion ratio of the past N days and the future N days; acquiring the weight of the daily generating capacity of the future N days; determining the total generating capacity of the future N days according to the daily generating capacity of the solar photovoltaiccell in the future N days and the corresponding daily generating capacity in the future N days; acquiring the remaining power of a storage battery; determining the predicted power supply according tothe total generating capacity and the remaining power; acquiring the average power consumption of loads with different priorities within N days; and accessing the loads with different priorities according to the predicted power supply and the average power consumption. The off-grid photovoltaic system load management method and system can solve the problem of insufficient power supply due to insufficient photovoltaic power generation and insufficient energy storage, for the user.

The invention belongs to the technical field of low-carbon emission reduction, and particularly relates to a distributed power generation CO2 emission reduction accounting method, device and equipment and a medium. The method comprises the following steps: acquiring power generation data of distributed power generation users; obtaining an electric carbon conversion parameter in the preset area; calculating the total generating capacity of distributed power generation; and substituting the power generation data of the distributed power generation users, the power-carbon conversion parameters in the preset region and the total power generation amount of distributed power generation into a preset carbon dioxide emission reduction model to obtain the carbon dioxide emission reduction amount generated in the distributed power generation process. According to the method, the power generation data of the distributed power generation users in the preset area, the power-carbon conversion parameters in the preset area and the total power generation amount of distributed power generation are comprehensively considered, the power-carbon conversion coefficient is accurately calculated, and the reduced carbon dioxide emission of distributed power generation compared with traditional power generation can be accurately calculated in different areas.