3536 results about "Microgrid" patented technology

An energy distribution may include a server and one or more databases. The system may communicate with an energy provider to receive energy provider data, at least one information collector to receive information collector data such as individualized energy usage data, customer preferences, and customer or location characteristics, and the one or more databases for receiving data for optimization. The system may calculate a cost of service or avoided cost using at least one of the individualized energy usage data and a system generation cost at a nearest bus. The system may also forecast individualized demand by end-use, individualized demand by location, energy prices, or energy costs. The system may optimize energy distribution, energy use, cost of service, or avoided cost using the forecasted individualized demand by end-use, the forecasted individualized demand by location, the forecasted energy prices, and the forecasted energy costs.

Systems and methods for energy optimization may receive receiving energy provider data, near-real time individualized energy usage data for each of a plurality of end-uses or near-real time individualized whole premise energy usage data, customer preferences, and near-real time and forecasted weather information. The systems and methods may forecast, for a selected time period, individualized energy usage for each of the plurality of end-uses or individualized whole premise energy usage data for a customer location using: (1) the energy provider data, (2) the near-real time individualized energy usage data, (3) the customer preferences, and (4) the near-real time and forecasted weather information. The systems and methods may optimize, for the selected time period, energy usage at the customer location using (1) the individualized energy usage, (2) the energy provider data, and (3) the customer preferences.

Systems and methods for performing power analytics on a microgrid. In an embodiment, predicted data is generated for the microgrid utilizing a virtual system model of the microgrid, which comprises a virtual representation of a topology of the microgrid. Real-time data is received via a portal from at least one external data source. If the difference between the real-time data and the predicted data exceeds a threshold, a calibration and synchronization operation is initiated to update the virtual system model in real-time. Power analytics may be performed on the virtual system model to generate analytical data, which can be returned via the portal.

A renewable energy resource management system manages a delivery of a power requirement from a multi-resource offshore renewable energy installation to an intelligent power distribution network. The installation includes multiple renewable energy resource components and is capable of variably and independently generating power from each to microgrids comprising the intelligent power distribution network so that the entire power requirement is satisfied from renewable energy resources. An electricity grid infrastructure is also disclosed in which power production is balanced with power consumption so that power storage requirements are minimized.

Systems and methods for real-time modeling of a microgrid. In an embodiment, real-time data is acquired from a microgrid. Predicted data for the microgrid is generated using a first virtual system model of the microgrid, which comprises a virtual representation of energy sources within the microgrid. The real-time data and the predicted data are monitored, and a calibration and synchronization operation is initiated to update the first virtual system model in real-time when a difference between the real-time data and the predicted data exceeds a threshold. Parameters of the first virtual system model can be modified to create a second virtual system model, and aspects can be forecasted for the microgrid operating under the modified parameters of the second virtual system model. In a further embodiment, market price information can be received, and optimization solutions can be generated based on the market price information.

The invention relates to a miniature power supplying system containing a plurality of distributed power supplies, and discloses an intelligent energy control system capable of controlling a microgrid by using forecast information. The intelligent control system for microgrid energy comprises a microgrid system and a control system, wherein the microgrid system comprises a power supply unit, an energy storage unit and a load unit, and the control system comprises an information collecting system and a central processing unit. The central processing unit comprises a load forecasting module, a microgrid online status estimating module, an energy forecasting module of an intermittent power supply energy forecasting and storing unit, a microgrid system analyzing module and a microgrid multiobjective optimization operation and comprehensive coordination control module. The intelligent control system for microgrid energy can control the microgrid according to the forecast information and accomplish the intelligent operation of the microgrid.

The invention discloses a microgrid system coordination control method which takes a storage battery energy storage system as a main power supply. The conventional inversion products and technology hardly form a microgrid and cannot meet the requirement on stable operation of the microgrid system. The storage battery energy storage system in the microgrid is taken as a main power supply when the microgrid independently works, the microgrid frequency and voltage are kept constant, and a distributed power supply controls the power along with the microgrid voltage and a phase angle; and a microgrid control system controls a bidirectional inverter for energy storage to effectively switch between a parallel control mode and an independent operation mode according to the state of an external power grid. The power supply in the microgrid has the advantages of high robustness, high speed, and capacities of realizing bidirectional flow of electric energy and flexible current control and meeting the requirement on stable operation of the microgrid system.

Systems, methods, and devices related to a microgrid system for providing power to a facility. A self-contained power system provides power to a facility using a combination of power storage elements and renewable energy sources. A connection to an external power grid may also be provided. The system optimizes power flow to the facility using power from the storage elements and the renewable energy sources and, if necessary, the external power grid. The optimization process predicts future power usage by the facility using power usage data from a predetermined time window. The optimization process can also take into account predicted energy generation amounts by the renewable energy sources. To optimize economic effects, the optimization process can also determine whether to buy and when to buy power from the external power grid.

A microgrid is a portion of an electric grid configured for separate management and control as compared with the rest of the grid and having attributes that can be tailored to meet specified needs including the needs of electric power consumers served by the microgrid.

The invention relates to an MAS-based (multi-agent system) multi-microgrid energy management system simulation method. The method is characterized in that a multi-microgrid energy management system is divided into a local management layer, a microgrid management layer and a microgrid coordinated management layer in different levels; various energy management functions of the different layers are used to establish a multi-microgrid energy management system model by different types of agents, and agent communication protocol is designed for coordination and convention of the agents. The agents in different control layers of the local management layer, the microgrid management layer and the coordinated management layer are integrated by a client-server architecture, and accordingly an MAT-based (multi-agent technology-based) multi-microgrid energy management system simulation platform is formed. The method is provided to verify different microgrid control strategies and scheduling plans.

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 microgrid power generation system includes a plurality of generators having a plurality of different rated capacities and a plurality of distribution nodes, at least some of the distribution nodes being powered by the generators. A grid is formed by the distribution nodes, the grid includes a system frequency. A plurality of loads are powered by the grid through the distribution nodes, the loads have a power demand. A processor includes a plurality of efficiency bands, each of the efficiency bands being for a corresponding one of the generators and including a plurality of generator switching points based upon droop of the system frequency and the power demand of the loads. The processor is structured to operate the generators and the loads under transient conditions based upon the efficiency bands.

Systems and methods for electric power messaging and settlements including advanced energy settlements, messaging, and applications for electric power supply, load, and / or curtailment and data analytics associated with the same. Systems and methods for providing data analytics and customer or consumer guidance and controls are provided, and coupled with graphic user interfaces for interactive control and command of grid elements, design, specification, construction, management and financial settlement for data centers and / or microgrids, business and residential power consumption, control, management, messaging and settlements, mobile applications, websites, marketing offers, optimal pricing for comparable energy plans, retail electric provider and direct consumer alternatives, network of power architecture, EnergyNet applications, software development kit, and application web-based storefronts.

The invention discloses a microgrid operation optimizing method by considering combined supply of cooling, heating and power with a stored energy operation strategy.The microgrid operation optimizing method comprises the following steps of: establishing a CCHP (combined cooling heating and power) microgrid optimizing model; constructing a target optimizing function with a target of lowest generating cost under a microgrid grid-connected operation state; according to the established target optimizing function, comprehensively considering load level of front and time periods with an output trend of each micro power supply, and determining the operation principle of an energy storage unit and a fuel battery to determine the best operation mode of the whole CCHP system in a scheduling period. The microgrid operation optimizing method disclosed by the invention has the beneficial effects that the microgrid electricity selling profits can be effectively increased for energy storage optimization, obvious advantages are provided in lowering the operation cost of the microgrid; the energy resource utilization rate of the stem can be improved and the energy gradient utilization can be realized in comparison with the conventional heat-engine plant and thermal power plant, so that reference is provided for energy saving of the power system; moreover, the energy is saved and the emission is reduced, pollution of air pollutants is greatly reduced, and significance is achieved in improving environmental benefits.

The invention discloses a control method for a grid-connected power generation system of an optical storage microgrid. According to the method, a photovoltaic power generation power supply is connected with a direct-current (DC) bus through a boost converter, and an energy storage module is connected with the DC bus through a bidirectional DC-DC converter; a DC side of a DC-AC (Alternating Current) grid-connected inverter is connected with the DC bus, and an AC side of the DC-AC grid-connected inverter passes through a filtering inductor and then is connected with a power grid and a load respectively; the photovoltaic power generation power supply is subjected to maximum power tracking control and constant-voltage control respectively through a boost converter control strategy according to the charging state of the energy storage module, the output power of the photovoltaic power generation power supply, the voltage drop conditions of grid connected points and the reactive power demand set value of the power grid, the charging and discharging of the energy storage module are controlled through a bidirectional DC-DC converter control strategy, and the voltage of the grid connected points is stabilized through a DC-AC grid-connected inverter control strategy. The method disclosed by the invention has the advantages that the stable grid connection of the optical storage microgrid is guaranteed, and the quality of electric power of the power grid is improved; the multi-functionalization of the grid-connected inverter is realized, and the cost is reduced; the new energy absorption capacity of the power grid is enhanced, so as to meet the demands of the power grid.

A method, apparatus, and computer program product is provided for configuring a microgrid. A first configuration of the microgrid having a set of microgrid elements is initialized. An address for each element in the set of microgrid elements of the microgrid is verified. In response to receiving status data from the set of microgrid elements connected in a peer-to-peer network indicating a reconfiguration of the microgrid, the set of microgrid elements is re-aligned to form a second grid configuration. The second grid configuration is executed.

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 relates to a park energy-network energy optimizing management system based on microgrids and an implementing method of the system. The energy optimizing management system is implemented by park energy scheduling and microgrid energy management. The micro power grid management system is in a three-layered structure including a microgrid energy scheduling layer, a microgrid centralized control layer and a microgrid, stored energy and load local control layer. Constraint conditions of the energy optimizing management method are guaranteed by the microgrid centralized control layer. The output of each microgrid or stored energy is determined by a microgrid and stored energy coordination control policy in a microgrid central controller; and an objective function includes three objective function subsets at different grades. Through computing the objective function values at various states by a multi-objective optimizing algorithm based on weight, the defect of randomness and intermittence of the distributed power source is overcome, the complementary problem among multiple microgrids and multiple micro power sources in the microgrid in the park energy network is solved, and optimized utilization of clean energy and maximization of system energy efficiency can be achieved.

A polarization camera includes a microlement polarizer that is situated in proximity to a focal plane array. The microlement polarizer is selectively scanned with respect to an optical image direct to the focal plane array, and an image processor stores a set of images associated with the scanning. Based on the stored images, a polarization image can be produced and displayed. A periodic microelement polarizer modulates the individual images of the set, and these images can be processed by filtering in the spatial frequency domain to isolate contributions associated with one or a combination of Stokes parameters. After filtering, Stokes parameter based images can be obtained by demodulating and inverse Fourier transforming the filtered frequency domain data.

A system for controlling a microgrid includes microgrid assets and a tieline for coupling the microgrid to a bulk grid; and a tieline controller coupled to the tieline. At least one of the microgrid assets comprises a different type of asset than another one of the microgrid assets. The tieline controller is configured for providing tieline control signals to adjust active and reactive power in respective microgrid assets in response to commands from the bulk grid operating entity, microgrid system conditions, bulk grid conditions, or combinations thereof.

The invention discloses a method for islanding microgrid control and optimization based on rotating coordinate virtual impedance. Aiming to a fact that the actual microgrids have complicated impedance characteristics, the method for islanding microgrid control and optimization based on the rotating coordinate virtual impedance includes utilizing the coordinate rotation orthogonal transformation to design the coordinate rotation virtual impedance, improving the impedance characteristics of the microgrid, compensating errors of power distribution and improving power decoupling performance; establishing a complete small-signal dynamic model of the microgrid, wherein the small-signal dynamic model comprises distributed energy sources, power converters, loads and power grids, and guiding the selection of an optimal value on the basis of the small-signal dynamic analytical method; and simultaneously, providing a theoretical basis for the optimization selection of islanding microgrid control parameters by using the small-signal dynamic analytical method, wherein the islanding microgrid control parameters comprise droop control coefficients of the power distribution, process identifier (PI) parameters of a voltage current feedback controller, feedforward control coefficients and the like. The microgrid after being subjected to optimization design in an islanded operational mode is capable of effectively achieving power decoupling and improving the accuracy of the power distribution, the stability of the system and the dynamic performances.

The invention discloses a microgrid running optimization system and method based on power and heat combined dispatching. Running restrains such as the output force characteristic, start, stop and climbing of a distributed type generator set and the charge and discharge characteristics of power and heat energy storage are comprehensively considered, a microgrid power and heat combined dispatching model containing a fan, a photovoltaic cell, a combined heat and power generation system, an electric boiler, a fuel cell and an energy storage (electrical energy storage and heat energy storage) is built, the 0-1 mixed integer nonlinear programming method is adopted for solving the optimal output force and total running cost of all units in the network, and power and heat dispatching contrastive analysis is carried out on the system and a traditional separated generation and combined generation optimization model. In addition, the influences of the heat and power reliability difference on the running are analyzed and discussed, and therefore the heat and power dispatching module is more reasonable, comprehensive and universal.

The invention relates to a microgrid smooth switch control method and strategy based on composite energy storage. According to the invention, a low voltage microgrid containing a plurality kinds of distributed power supplies is arranged, a public connecting point PCC in the low voltage microgrid, the distributed power supplies and the switches of all branches are monitored by a microgrid energy management system EMS, and the microgrid energy management system EMS detects the on / off state of the public connecting point PCC of the microgrid to judge whether the low voltage microgrid is located at an isolated island operation state or a grid-connected operation state. The microgrid smooth switch control method is characterized in that a composite energy storage unit composed of a supercapacitor and a storage battery is arranged in the low voltage microgrid containing the plurality kinds of distributed power supplies, and the composite energy storage unit is used for performing microgrid smooth switch control on the basis of the monitoring of the microgrid energy management system EMS on the low voltage microgrid. According to the invention, the composite energy storage characteristics are fully utilized to greatly improve the power supply reliability and power supply quality of the microgrid under a switch emergency state to facilitate the generalization and application of the microgrid.

The invention relates to a multi-agent optimized coordination control method of an electric network in the technical field of electric networks, which comprises the following steps of: collecting local electric information, transmitting the local electric information to a central agent of a microgrid and issuing a control command by a local electric network to the central agent of the microgrid simultaneously; computing by a grid technology; issuing a new control command by the central agent of the microgrid and transmitting the information to a regulation agent of the local electric network by a network line simultaneously; receiving a dispatching instruction of the central agent of the microgrid by the agent of each element and carrying out logical judgment on a result executing these dispatching commands according to the collected local electric information; and meanwhile, optimizing the electric network within a control range by the regulation agent of the local electric network and controlling a computer to carry out parallel computation by the grid technology. The invention is suitable for carrying out optimal dispatching on a distributed energy resource of an intelligent electric network, can control each power supply by an optimization scheme, also enhances the operational processing time greatly and ensures that the intelligent electric network runs safely, stably and economically.

The particle swarm optimization method for microgrids formulates a control problem as an optimization problem and PSO is used to search the solution space for optimal parameter settings in each mode. The procedure models optimal design of an LC filter, controller parameters and damping resistance in grid-connected mode. Moreover, the procedure optimizes controller parameters and power sharing coefficients in autonomous mode. The method uses particular nonlinear time-domain-based and eigenvalue-based objective functions to minimize the error in the measured power, and also to enhance the damping characteristics, respectively.

The invention relates to a grid connection presynchronization control method of a microgrid inverter based on droop control. When the microgrid operates in island, as a voltage source type inverter which functions as the support in the microgrid works in accordance with droop characteristic, a microgrid voltage has a deviation from a high power grid voltage; and the problem of synchronization between the microgrid voltage and the high power grid voltage during the grid connection is the key to realize smooth switchover. The grid connection presynchronization control method provided by the invention comprises the following steps: obtaining frequency and phase position information of the high power grid voltage through a three phase software phase-locked loop (SPLL); carrying out dq (Direct Quadrate) conversion to an output voltage of the inverter based on a power grid voltage phase obtained from the locked phase; subsequently carrying out PI (Physical Impairment) regulation on a q-axis component; overlapping a synchronization angle frequency output by a PI regulator with an angle frequency generated by the droop control to be used as a reference angle frequency of the output voltage of the inverter; and finally realizing the tracking and synchronization of the output voltage of the microgrid inverter to the high power grid voltage through the closed-loop control. The impact current during the grid connection is avoided effectively.

The invention discloses a multi-time scale microgrid energy control method considering demand response. According to the multi-time scale microgrid energy control method considering the demand response, in order to achieve the purpose of lowest operation cost of a microgrid, the electricity generating characteristic of a micro power source and demand response load power utilization property difference are combined to provide a user side load interruptible capacity limiting value, an electricity generating unit power output limiting value, a climbing constraint condition, an energy storage unit storage capacity constraint condition and an interaction maximum capacity constraint condition, an economic combination which can guarantee the optimum environmental benefit is searched under the multi-time scale condition by means of the genetic optimization algorithm, frequency modulation and spare capacity of a main grid are indirectly reduced, and the economical performance of complete-period operation of the grid is improved.