72 results about "Grid operator" patented technology

Systems, methods, and apparatus embodiments for electric power grid and network registration and management of active grid elements. Grid elements are transformed into active grid elements following initial registration of each grid element with the system, preferably through network-based communication between the grid elements and a coordinator, either in coordination with or outside of an IP-based communications network router. A multiplicity of active grid elements function in the grid for supply capacity, supply and/or load curtailment as supply or capacity. Also preferably, messaging is managed through a network by a Coordinator using IP messaging for communication with the grid elements, with the energy management system (EMS), and with the utilities, market participants, and/or grid operators.

Systems and methods for managing power supplied over an electric power grid by an electric utility and/or other market participants to multiplicity of grid elements and devices for supply and/or load curtailment as supply, each of which having a Power Supply Value (PSV) associated with its energy consumption and/or reduction in consumption and/or supply, and wherein messaging is managed through a network by a Coordinator using IP messaging for communication with the grid elements and devices, with the energy management system (EMS), and with the utilities, market participants, and/or grid operators.

Systems, methods, and apparatus embodiments for electric power grid and network registration and management of physical and financial settlement for participation of active grid elements in supply and/or curtailment of power. Settlement is provided for grid elements that participate in the electric power grid following initial registration of each grid element with the system, preferably through network-based communication between the grid elements and a coordinator, either in coordination with or outside of an IP-based communications network router. A multiplicity of active grid elements function in the grid for supply capacity, supply and/or load curtailment as supply or capacity, and are compensated through settlement for their functional participation in the electric power grid. Also, messaging related to settlement is managed through a network by a Coordinator using IP messaging for communication with the grid elements, with the energy management system (EMS), and with the utilities, market participants, and/or grid operators.

A system, method and computer program product to assist in managing the physical plant mechanisms and market finances for a deregulated electricity grid or regulated utility grid, populated with solar electric generation capacity. This system provides tools to assist grid operators in the scheduling and dispatch of generation resources in an electrical grid populated with solar electric generation capacity, a week in advance, on an hourly basis. It also provides tools to assist companies engaged in generation, distribution and energy marketing, in the electrical power industry, to manage their contractual supply obligations in the day-ahead hourly wholesale market and the spot market, in an electrical grid populated with solar electric generation capacity. This process can also be used to predict solar loading of building structures, using forecast irradiance data as inputs to common building energy modeling programs, a week in advance, on an hourly basis.

Approaches for managing and maintaining a state of charge of an energy storage device by adjusting (biasing) responses to electrical grid operator commands to perform ancillary services are disclosed. In embodiments, methods and systems regulate a set point regulation in an energy system. In an embodiment, a method determines when the set point needs to be changed, calculates a new set point, and moves the output of the system from an old set point to the new set point at a defined ramp rate. The method then incorporates, as part of a set point algorithm, the capability to restore the energy storage device to a desirable state of charge (SOC). Embodiments implement Dynamic Bias, SOC and Signal Bias Range Maintaining, Operational Limits, and Fixed Signal Bias algorithms and perform Intelligent Algorithm Selection to manage and maintain the SOC of an energy storage device by biasing responses to grid operator commands.

The invention discloses an elastic wave forward simulation technology based on the space-time dual-variable grid, comprising the following steps: determining the stability conditions of the target area and the background area according to the speed parameter and the elasticity parameter of the underground medium aiming to the known earthquake geological model so as to calculate the size of the space grids with different dimensions and perform the discretization process to the speed field; obtaining the space arbitrary precision difference formula of the grid point variables with different dimensions by using the Taylor's formula and the finite difference technology, which is the arbitrary even order accuracy space difference formula of the space constant grid operator and the space variable grid operator, and calculating the wave field values of the precise division area, the rough division area and the middle transitional belt area by using the deduced space difference formula; in the wave field extrapolation process of the time layer, using different time sampling intervals to different grid division areas and meet the partial stability condition, obtaining the wave field value of the precise grid point in the precise time layer and the wave field value of the rough grid point in the global time layer; in each global time layer, transmitting the wave field value of the precise grid division area to the rough grid division area, thereby obtaining the space wave field value of the whole speed field at the said moment; performing the wave field extrapolation on each time layer by the said method and obtaining the forward simulation record of single cannon. The partial stability condition of the shallow layer can be met, so as to avoid the frequency dispersion noise.

A central site, using grid operator requirements to reduce portfolio power according to frequency decreases within a frequency band, determines the optimal frequency triggers at which each load within a portfolio should reduce power and by how much power. Power availability of each load is optimized. These triggers and individual load power reductions are periodically dispatched from the central site to the individual loads. Each load detects when a frequency deviation occurs and is able to independently and rapidly reduce its power consumption according to the triggers and corresponding power reductions it received previous to the frequency deviation. Reliance upon the central site to detect a frequency deviation and then to dispatch power reductions in real time is not needed. The system also detects frequency increases and directs a portfolio of loads to consume more power. The system applies to energy loads and detection of a grid signal in general.

The invention provides a network attack risk assessment method of a distribution network CPS dependent system based on an attacker perspective. From an attacker perspective, the risk level caused bypower grid cps system attack is analyzed based on different attack and invasion aims and the risk situation of potential attack paths is analyzed, so that the method provides a new perspective for thestudy of cps security analysis and protection methods, and provides an accurate basis for grid operators to formulate defensive measures.

A versatile intelligent fault diagnosis (IFD) method for a distribution grid integrating renewable energy resources is described. Advanced signal processing techniques extract useful features from recorded three-phase current signals, which are input to a multilayer perceptron neural networks (MLP-NN) to diagnose i.e., to detect, classify, identify the feeder branch, and locate the faults. Once a fault is detected, classified and located, a grid operator may adjust grid parameters or dispatch a technician to correct the fault. The IFD method is independent of load demand, renewable energy generation, and fault information (resistance and inception angle) uncertainties, as well as measurement noise.

A method for controlling a wind power park including the steps of: collecting information relating to meteorological conditions at the location of the wind power park, estimating for each of a plurality of the wind turbines the production costs per unit energy at different load levels of the respective wind turbine, collecting information from a utility grid operator relating to energy prices and possible requirements relating to the amount of power delivered from the wind power park to the utility grid, controlling the wind power park by deciding on a total amount of power to be delivered from the wind power park and distributing the decided power production between individual wind turbines, and repeating the above steps in order to obtain a dynamic control of the wind power park. Further, a wind power park being controlled by such method is disclosed.

The invention provides an early-warning method and a system for an overheating risk for cable lines of a distribution network. The method comprises steps of: calculating resistance values of the cablelines in the historical period; determining resistance values of the cable lines in the prediction period according to the resistance values for the cable lines in the historical period; implementingthe early-warning of the overheating risk for the cable lines, according to a preset early-warning rule for overheating risk for cable lines and the resistance values of the cable lines in the historical period and the prediction period, wherein the early-warning rule for overheating risk for cable lines comprises a resistance threshold value, which is determined from the highest rated temperature and the linear relationship between the body temperature and the resistance. According to the early-warning method and the system for the overheating risk for cable lines of the distribution network, the method and the system can effectively realize the real-time monitoring and the prediction for the impedance parameters of cable lines of the distribution network; can accurately predict the overheating risk of the cable lines of the distribution network; has the advantages of being good in practicability, small in cost, simple in calculation, and easy to operate; and can provide a decision basis for the grid operator to operate and to maintain the cable lines.

The invention discloses a coordinated scheduling method with AA-CAES for grid power and standby capacity. The method comprises a step of establishing an objective function of a grid power and standbycapacity coordinated scheduling model including power purchase cost, purchase standby cost and wind curtailment cost, a step of establishing constraints of the grid power and standby capacity coordinated scheduling model including AA-CAES power plant operation constraints, AA-CAES power plant standby capacity constraints, system constraints and conventional unit constraints, wherein positive and negative standby capacity constraints in the system constraints are expressed by using a fuzzy opportunistic constraint form, a step of carrying out clear equivalence processing on wind power unit output error and load prediction error fuzzy numbers of system positive and negative standby capacity constraints in the conventional unit constraints, carrying out linear processing on the AA-CAES powerplant operation constraints, and obtaining a clear equivalent model of grid power and standby capacity coordinated scheduling, and a step of solving the clear equivalent model by using optimization software to obtain an optimal power and standby capacity purchase plan of a grid operator.

A method for rebuilding an electric supply grid of a grid operator by means of at least one wind power installation, wherein the electric supply grid has a first grid section and at least one further grid section, wherein the first grid section is connected to the at least one wind power installation and has a first grid nominal voltage, the first grid section is coupled to the at least one further grid section via at least one switching device in order to transmit electric energy between the grid sections, wherein the at least one switching device is set up to disconnect the first grid section from the at least one further grid section in the event of a fault, comprising the steps of operating the at least one wind power installation in an observation mode if the fault occurs, wherein the wind power installation does not feed the first grid section in the observation road and a status of the first grid section is checked, and operating the at least one wind power installation in a grid rebuilding mode if the first grid section has a grid rebuilding voltage, and operating the at least one wind power installation in a normal operating mode again as soon as the fault has passed.

The invention relates a method for controlling a common output from at least two wind turbines comprising the steps of receiving at a central wind turbine control system at least one set point value of a set point parameter from a utility grid operator, and at least one operational value of a operational parameter from at least one of said wind turbines Furthermore the method comprises the steps of stablishing a cost function equation comprising at least one function variable reflecting an operational parameter of said wind turbines and said received set point parameter, solving the cost function equation with respect to said at least one function variable to find an extremum for said cost function, calculating weighted operational parameter set points for each of said wind turbines from the obtained solution, and controlling at least one of said wind turbines in relation to said weighted operational parameter set points. The invention also relates to a central wind turbine control system, a wind park and a cluster of wind parks.

The invention relates to a method for operating a current generation device comprising an inverter, to a computer program product for controlling an inverter, to an apparatus for controlling a current generation device comprising an inverter and to a corresponding current generation device. The problem of proposing a method for operating a current generation device comprising an inverter with which the proportion of harmonics is limited in a simple manner such that the specifications of the grid operator are adhered to and nevertheless an optimum power output is provided, is achieved by virtue of the fact that the inverter can be operated at at least two different switching frequencies, wherein the ratio of the operating duration of the inverter at a first switching frequency to the operating duration of the inverter at at least one further switching frequency is selected depending on at least one manipulated variable, and the proportion of harmonics occurring is selected as a manipulated variable.

Example implementations described herein are directed to detection of historical anomalous events that are similar to currently occurring events in a transmission power system based on phasor management unit (PMU) data to provide information to grid operators with online decision support. From the high-resolution time synchronized PMU data, the historical events can be quickly retrieved and compared to the currently occurring event so that operators can be provided with remedy actions that were attempted in response to the historical events. Utilization of PMU information for such decision support may compliment operation practices relying on supervisory control and data acquisition (SCADA) measurements by allowing a much fast response to the currently occurring event. Accurate identification of similar, historical events can advise grid operators of the cause of disturbances and provide ideas for response. Implementations of the proposed technology may improve the resilience and reliability of the transmission power systems.

The invention provides a smart home control strategy based on temperature change. The smart home control strategy comprises the following steps: negotiating, by an aggregator, with a grid operator through a service agent to determine a consumption task; sensing a real-time scheduling state of each load individual in any time slot according to a consumption task message; establishing an informationcontrol model of each load individual under a load aggregation system, analyzing and correcting a regulation and control variable in the time slot in real time, and determining a regulation and control type in the time slot; establishing a load selection logic rule, and performing scientific decision making on the load individuals participating in the regulation; and establishing a temperature setting value control rule to accurately execute a control signal of each load individual in an equipment group. According to the smart home control strategy provided by the invention, the information control model of each load individual and the temperature control value control rule are established, the control strategy architecture of the load aggregation system of four links, that is, state feedback logic, real-time analysis logic, scientific decision making logic and accurate execution logic, is designed to achieve the consumption of redundant new energy power generation in a power grid bythe aggregation load, and a feasible strategy is provided to solve the problem of supply and demand imbalance of the power grid caused by new energy penetration.

The invention discloses a device and method for giving an early warning about a main transformer DC magnetic bias event. The device comprises a plurality of GPS clock modules, a plurality of shunts, aplurality of AC/DC synchronous acquisition modules, a data monitoring module, a big data analysis module and an early warning module; a main transformer neutral point ground loop in each monitoring point is connected in series with a shunt; each shunt is provided with a wiring terminal for sampling an AC/DC signal flowing through the main transformer neutral point; each shunt and the GPS clock module corresponding thereto are electrically connected to an AC/DC synchronous acquisition module; each AC/DC synchronous acquisition module communicates with the data monitoring module through a communication module; the data monitoring module is connected with the big data analysis module; and the big data analysis module is connected with the early warning module. The device can analyze the synchronism of DC fluctuations at multiple monitoring points, identifies a DC magnetic bias event, quickly identifies the type and hazard level of the DC magnetic bias event, locates a harmonic source, and provides a decision basis for grid operators and maintainers.

The invention discloses a clustering method based on an adjacent grid search strategy, and the method comprises the steps: firstly carrying out grid division of original data: enabling an original data set to be divided into a limited number of cells through a multi-dimensional space grid, and carrying out the denoising processing when necessary; secondly, performing grid clustering on the divided data: processing the denoised grids by utilizing a halo threshold value, and dividing the denoised grids into halo cell elements and core cell elements; establishing an adjacent grid operator for quickly searching an adjacent cell element of one cell element; achieving a clustering process through two steps of core cell element clustering and halo cell element division, dividing all core cell elements into a plurality of class clusters through a traversal algorithm, and dividing halo cell elements into existing class clusters based on cell element distances; and finally, clustering optimization is carried out according to data characteristics and user requirements. Compared with the prior art, the method has the advantages that a new clustering method can be provided for rapidly increasing the dimension of the sample set, and class clusters with complex boundary shapes can be effectively identified.

The invention provides a block chain-based micro-grid distributed energy transaction method, and belongs to the technical field of micro-grids. Comprising the steps that a micro-grid operator carries out matchmaking transaction according to electricity selling information and electricity purchasing information, and an intelligent contract signed between a power generation party user and an electricity purchasing party user is generated; the micro-grid operator broadcasts the intelligent contract to the block chain network and stores the intelligent contract to a node, and the intelligent contract is packaged into a block at the node and is chained; the micro-grid operator executes the smart contract, and completes value transfer and energy transfer of the smart electric meter according to the content in the smart contract; the micro-grid operator checks whether the actual power generation amount of the power generation party user is equal to the declared transaction power amount; the to-be-withdrawn amount of the power generation party is accounted; and the micro-grid operator returns the to-be-returned amount of the power generation party and the guarantee fund of the power purchasing party. The invention further provides a micro-grid distributed energy transaction system based on the block chain.