16 results about "Distributed generator" patented technology

A design method, device, equipment and medium of a self-optimizing droop control strategy are disclosed. The features include: obtaining operation parameters and power parameters of a distributed generator set, constructing a multi-objective optimization function according to the operation parameters and the power parameters; determining an optimal operation condition according to the multi-objective optimization function; and designing a self-optimizing droop control strategy for a target droop controller according to the optimal operation condition. By setting the control strategy of the self-optimizing droop controller, optimal distribution of active power and reactive power can be achieved, the accuracy of the distribution of active power and reactive power is improved, the droop controller achieves optimal control in terms of operation cost and effective power, and the distributed generator set of the micro-grid can maintain the optimal operation condition under different load conditions.

The invention relates to a virtual power plant transaction auxiliary calculation method and system, and belongs to the technical field of participation of virtual power plants in power markets. According to the method, a day-ahead virtual power plant optimization model which takes the lowest total cost as an optimization target and comprises the corresponding cost of the day-ahead bidding power of a virtual power plant to an energy market, the power of a virtual power plant flexible load aggregator and the dispatching power of a virtual power plant generator set and energy storage equipment is adopted; obtaining a power track reference value of the flexible load aggregator under constraint conditions corresponding to the power flow equation, the distributed generator set, the energy storage equipment and the flexible load aggregator; calculating a power track actual value of the flexible load aggregator according to a power consumption curve of a flexible load for determining a flexible load operation plan obtained after depolymerization optimization is performed on the reference value, and substituting the power track actual value into a day-ahead virtual power plant optimization model; and obtaining the day-ahead bidding power for determining the day-ahead bidding plan and the scheduling power for determining the day-ahead scheduling decision plan under the constraint condition.

Provided in the embodiments of the present disclosure are an optimal control method and system for a distribution network with a high penetration of distributed generators, and an electronic device, a computer-readable storage medium and a computer program product. The optimal control method is applied to a centralized control platform. The method comprises: on the basis of an association relationship between power outputs of distributed generators at various levels, performing multi-level forecasting on historical power generation data of each distributed generator, so as to obtain a day-ahead forecasted output value of each distributed generator; for each distributed generator, determining a day-ahead output adjustment value on the basis of historical power flow data and an optimal power flow optimization model; and sending to the corresponding distributed generator the output adjustment value and forecasted output value of each distributed generator as centralized control instructions, so that the distributed generator controls an output value during each control period within the day ahead on the basis of an acquired real-time output measurement value, the acquired output adjustment value and the acquired forecasted output value.

The utility model discloses a triple co-generation distributed power plant reverse power protection system and a power grid system, the triple co-generation distributed power plant reverse power protection system comprises a triple co-generation distributed generator room and a power consumer power distribution room which are connected through a special line, and the power consumer power distribution room is connected with a power grid through a transformer. The power consumer distribution room comprises a current detection device, a signal acquisition device and a first photoelectric converter, and the first photoelectric converter is connected with the signal acquisition device and used for converting electric signals into optical signals. The triple co-generation distributed generator room comprises a second photoelectric converter, an execution protection device and a reverse power protection device, the second photoelectric converter is connected with the first photoelectric converter through an optical cable and used for converting optical signals into electric signals, and the reverse power protection device is connected with the second photoelectric converter and the execution protection device and used for converting the electric signals into electric signals. And when reverse power is detected, the execution protection device is controlled to be disconnected.

A microgrid (MG) controller can control a plurality of distributed generators (DGs) of photovoltaic (PV) arrays. The MG controller can include a power sharing unit configured to share power proportionally in a single current controlled mode (CCM) between the plurality of DGs based on a power capacity for each DG. The power sharing unit can include a robust current droop controller (RCDC) configured to provide proportional active current shared between the plurality of DGs. The power sharing unit can also include a quasi-proportional resonant (QPR) regulator coupled to the RCDC within a unified architecture. The QPR regulator can be configured to regulate a reference current signal.

A method and a system for distributed control of a direct current (DC) microgrid having a plurality of distributed generators (DGs) coupled to a DC bus through a plurality of converters includes measuring local voltage and current of each DG and computing, via a distributed voltage observer, an estimated average bus voltage using neighbor information exchanged over a communication network. Incremental cost (IC) consensus and bus voltage regulation errors are determined and constrained within time-varying performance bounds using an adjustable prescribed performance function (APPF). Control inputs are computed for convergence within a fixed time independent of initial conditions. An event-triggered communication mechanism minimizes data exchange by transmitting updates only when a triggering condition is satisfied. The droop references of the converters are updated to equalize DG ICs within power limits to regulate the estimated average bus voltage of the microgrid towards the nominal bus voltage.

The invention belongs to the technical field of micro-grids, and particularly relates to a micro-grid capacity configuration optimization and investment decision-making method and device considering multiple objectives, and the method comprises the steps: constructing a capacity optimization model considering the economic cost, renewable energy utilization efficiency and carbon emission of a micro-grid; establishing a multi-level evaluation index system covering four dimensions of economy, environment, society and technology; solving the capacity optimization model by adopting a multi-target particle swarm optimization algorithm to obtain an optimal capacity configuration scheme of each distributed generator set, an energy storage battery and a diesel generator; calculating a subjective / objective weight coefficient of each index; based on the game theory, obtaining an optimal subjective weight coefficient and an objective weight coefficient, and calculating a comprehensive weight; and sorting the optimal capacity configuration schemes by utilizing the comprehensive weight and adopting a distance evaluation method based on an average solution to obtain a final decision result. The method can objectively distinguish the advantages and disadvantages of micro-grids of different technical routes, and provides comprehensive quantitative support for investment decision making and policy making.

This invention relates to the field of microgrid control technology, and discloses a distributed harmonic control method, device, and multi-inverter system for multi-inverter systems. In this invention, adjacent inverter control units are connected to form a ring network. During harmonic control, the output voltage and output current of the inverter in the inverter control unit are used to separate the fundamental and harmonic components. Based on the obtained fundamental component, the fundamental component of the outer loop reference voltage is calculated. The harmonic power is calculated based on the harmonic current component. Combined with the harmonic power of other interconnected units, a harmonic power sharing controller is calculated to determine the harmonic voltage gain coefficient. Based on this coefficient and the harmonic current component, the harmonic component of the outer loop reference voltage is obtained. The outer loop reference voltage is then calculated, and the control voltage for the corresponding three-phase inverter bridge is obtained from this reference voltage. This invention is unaffected by grid interference and feeder impedance mismatch, compensates for voltage distortion caused by nonlinear loads, and achieves precise harmonic power distribution between the DG (Distributed Generator and Controller).

Disclosed are a ship power management method and apparatus for stably connecting an axle generator to a ship power system and stably inputting power thereof, and a ship using the same. The ship power management method includes: connecting an axle generator to a ship power system; a generator-side converter controlling a power converter connected to the axle generator with a zero power reference; charging a DC link capacitor of the power converter; the shaft generator is excited by using the current of the DC link capacitor so as to realize self power generation; a grid-side converter controlling the power converter with a zero power reference; controlling the generator-side converter to charge the DC link capacitor with the power of the axle generator; and performing secondary voltage control in the power converter such that the axle generator operates as a distributed generator of the marine power system.

A method and system for controlling a photovoltaic solar power generation source operatively coupled to a power grid system at a point of common coupling (PCC) to perform a plurality of dynamic reactive power control based functions including: reactive power set point control, power factor control, and voltage control, when its primary energy source is not available, and available. Voltage control may also prevent PCC voltage from violating a voltage limit caused by real power generation from itself or by real power generation from an additional distributed power generation source operatively connected to said power grid system, or by both. Controlling a battery energy storage based distributed power generation source operatively coupled to a power grid system at a PCC to perform reactive power set point control, power factor control, and voltage control, during both the conditions when its primary energy source is not available, and available is also provided.

This invention provides a method for calculating carbon emissions in a distributed generation (DG) stochastic output distribution network. The method includes: acquiring raw data of the DG stochastic output distribution network; inputting the raw data into a preset node admittance matrix to determine the distribution probability of parameters at each node in the distribution network, and performing deterministic power flow calculation based on the determined distribution probability to obtain the randomly distributed generator carbon emission intensity; calculating the corresponding judgment coefficient based on the obtained randomly distributed generator carbon emission intensity; determining whether convergence is required based on the judgment coefficient; if convergence is required, redetermining the distribution probability of each node parameter and re-performing the deterministic power flow calculation until convergence is no longer required; if convergence is not required, outputting the obtained randomly distributed generator carbon emission intensity and power flow results as the final calculation result. This invention lays a solid foundation for the comprehensive analysis and evaluation of carbon emissions under various operating conditions and meets the requirements for carbon flow calculation in distribution networks containing DG.

The utility model discloses a kind of range-extending eVTOL battery swap cars, including engine, generator, motor, fixed battery, eVTOL battery swap battery and main control system. Engine drives generator power generation, motor drives vehicle with electric energy, main control system controls and regulates generator, charging seat input, fixed battery and the electric energy distribution of battery swap battery, battery swap battery is used for eVTOL battery swap. Battery swap battery is parallelly connected, built-in BMU and the Master BMU communication of main control system, ensure that voltage is consistent, synchronous work. Main control system can distribute generator power, brake recovery energy to fixed or battery swap battery, and battery swap battery electric energy can also be motor power supply. Fixed and battery swap battery adopt interlocking connection, avoid simultaneously accessing power loop, improve security and endurance flexibility.

Systems and methods for advanced energy settlements in electric power grid are proposed. At least one energy customer, at least one retail electric provider and at least one distributed generator connect to an advanced energy settlement platform communicatively. The advanced energy settlement platform is operable to summate a customer balance from all the settlement blocks during a billing period and collect payments from the at least one energy customer automatically; aggregate and settle distributed energy charges with distributed generators and fixed energy charges with the energy retailer or retail energy provider for the at least one energy customer during the billing period. The advanced energy settlement platform also provides interactive graphical user interface for different participants in the advanced energy settlement and for advanced energy settlements application development kit (ADK) for access to functionality within the advanced energy settlement platform.

The present application relates to the technical field of data processing, in particular to a kind of distributed generator production process state monitoring method and system, adaptive segmented collection is carried out to multimodal parameter in edge end, and operating characteristic vector containing statistics, trend and coupling feature is extracted;Gaussian mixture baseline model is constructed and dynamically updated, local health index is calculated, and early degradation evidence is generated when index is lower than threshold value or continuously decreases;Relationship graph is constructed based on electrical connection, geographical proximity and control domain in cloud, and system consistency score is calculated;Local health index and consistency score are fused, and alarm is output according to three priority levels of individual serious degradation, systematic abnormality and early weak degradation.The present application reduces communication load, improves early and accuracy of abnormal detection, and can effectively identify systematic operation disorder risk.

The invention relates to the technical field of converter stations, and discloses a converter station direct current control protection whole group test flow injection method and device and a storage medium. The method is based on a plurality of distributed test current generators, and each test current generator comprises a contact terminal, a current sampling module, a current adjusting module, an internal resistance compensation module and a winding battery module which are sequentially connected in series; the current adjusting module is provided with several groups of parallel resistor rows, and the change-over switch is connected with a wireless execution module. The method comprises the steps that a wireless execution module obtains a remote starting instruction and starts generators in sequence according to a preset sequence and interval; the current sampling module obtains test data, calculates a comparison value with reference data, and adjusts the closing number of the change-over switches in a negative correlation manner. According to the method, alternating-current power supply is not needed, multi-measuring-point synchronous flow injection is achieved through a distributed generator and wireless control, direct-current fault current can be accurately simulated, a protection device and a measuring loop are integrally verified, hidden danger is checked, and the direct-current protection reliability of the converter station is improved.