490 results about "Internet of energy" patented technology

The invention relates to an area type energy Internet and an integrated optimization planning method thereof. The area type energy Internet comprises local energy resources, distributed energy, production and consumption integrated energy and mutually connected area micro energy nets. The integrated optimization planning method comprises the following steps: 1, obtaining an area type energy Internet planning design database; 2, establishing an optimization mathematic model; 3, obtaining input variable parameter values needed by the optimization mathematic model from the area type energy Internet planning design database, solving the optimization model, and obtaining output data of decision variables; and 4, analyzing the output data of the decision variables to obtain a cooperation optimization result, wherein the cooperation optimization result comprises an optimal technological type selection and layout, an optimal equipment capacity, an optimal heat network layout and an optimal operation strategy. Compared to the prior art, the area type energy Internet and the integrated optimization planning method thereof overcome the defects of poor interaction between energy users and difficult supply-demand matching in the prior art and have the advantages of networking, systematization, high efficiency and the like.

The invention discloses a regional energy internet scheduling method based on random planning and model predictive control. The method comprises the steps of (1) analyzing the operation characteristics of all units and interconnection lines in a regional energy internet, and constructing a mathematical model of each unit; (2) analyzing the output of the wind and light renewable energy and the uncertainty of cold, heat and electric loads, and generating prediction scene data which are required for the operation of the optimization scheduling by adopting the scene generation and reduction technology; (3) establishing a day-ahead scheduling random planning model with the lowest total operating cost of the system as a target, and determining the on-off state of each unit; (4) establishing an intra-day scheduling random planning model with the lowest total operating cost of the system as a target, and determining the running power in each unit within a day; (5) establishing an intra-day real-time rolling correction model by adopting the model predictive control technology, and correcting the operation plan of each unit. According to the invention, the accurate tracking of loads and thesmooth unit output are achieved. The high dynamic performance and the strong robustness are also realized.

The invention discloses an energy internet trusted service management system and method based on a block chain. The system comprises a trust establishment module, a transaction management module and an attack defense module. The trust establishment module establishes trusted service interaction between different objects by using the block chain and a digital signature method, and provides a trustworthy environment for the service interaction by using the block chain technology; the transaction management module provides transaction management between a service provider and a server requester by using the transaction between an intelligent contract and block chain management service provider and the server requester; and the attack defense module is used for defending against external attacks, preventing network attacks and malicious node spoofing, and ensuring the credibility and security of the transaction. According to the energy internet trusted service management system and method,by adoption of the block chain technology, the transparency and decentralization of the energy internet trusted service management can be realized, the maintenance cost is greatly reduced, fast response can be made to the network change of the energy internet, and the data security of the block chain and the whole network security are protected.

The invention discloses a dual-capacitor module based MMC type multi-port power electronic transformer. The transformer comprises a modular multilevel converter (MMC), a DC/DC converter and an inverter, wherein the MMC has two sub modules; the DC/DC converter comprises a primary part, a high frequency voltage transformation part and a secondary part, wherein the primary part has four kinds of selective topologies. The transformer can be operated on the high voltage direct current side at a low voltage; the transformer has fault ride-through capability, and relatively less devices are used; the module in the MMC and the DC/DC converter are responsible for direct current voltage control and power control respectively; a single capacitor voltage of the module can be controlled independently, or two capacitor voltages of the module can be controlled simultaneously; the transformer is equipped with the four ports, including a high voltage direct current port, a high voltage alternating current port, a low voltage direct current port and a low voltage alternating current port, so that the transformer is suitable for multi-kind high-voltage high-power occasions of multiple voltage levels, and particularly suitable for the energy internet; for example, the transformer can be used as an energy router, and the like.

The invention discloses an energy Internet router (100). The energy Internet router comprises a control module (101) used for energy exchange between a plurality of distributed energy stations and distributed energy users, routing management and point-to-point electric power transaction control in the same local area network; an acquisition module (102) connected with the control module (101) andused for acquisition of electric quantity measurement data of an electric meter (200); and a blockchain module (103) used for data exchange with the control module (101), realization of point-to-pointelectric power transaction between nodes in a blockchain network in an area, and distributed electric quantity measurement and storage of transaction data. The energy Internet router and the electricmeter are used in a combined manner, the electric power transaction and recording can be performed through the blockchain module, final electric quantity information and point-to-point electric powertransaction information are both stored in the blockchain network in a distributed manner and cannot be tampered, and measurement, transaction and recording of the electric quantity of distributed intelligent micro-power-grids can be realized.

The invention discloses a steady-state analysis method of an electric-natural gas area comprehensive energy system. The method comprises the steps of (1) performing modeling and solving on a natural gas system of the electric-natural gas area comprehensive energy system; (2) performing node pressure-load sensitivity analysis on the natural gas system; (3) based on natural gas system information and energy interaction information, structuring energy coupling link modeling and energy conversion analysis which take an energy concentrator as the core; (4) performing steady state solving on a power system; (5) structuring a steady-state analysis comprehensive solving model of the electric-natural gas area comprehensive energy system to obtain the influence led by network state change of the natural gas system. Aimed at an operational scenario of 'power determined by gas', the steady-state analysis method of the electric-natural gas area comprehensive energy system explores the influence of the network state change of the natural gas system on the natural gas system and the area comprehensive energy system and provides a certain theoretical foundation for energy mutual aid and mutual influence analysis in an energy Internet.

The invention provides an energy Internet networking method based on resource and load matching. The energy Internet networking method based on resource and load matching is characterized in that the advanced power electronic technology, the information technology and the intelligent management technology are comprehensively utilized to interconnect a lot of novel networks formed by a distributed energy acquisition apparatus, a distributed energy storage apparatus and various types of loads, and an energy Internet interconnects a power network, a petroleum network, a natural gas network and other energy nodes so as to realize an energy peer exchange and share network which can realize bidirectional flow of the energy. The energy Internet which is set by the means of the energy Internet networking method based on resource and load matching connects billions of devices, machines and systems of an energy production end, an energy transmission end and an energy consumption end to form the basis for internet of things for the energy Internet, and is quick and optimized in response so that the energy Internet becomes a relatively more reasonable energy Internet.

The present invention proposes an energy Internet-based multi-port multi-bus electric energy router topological structure and belongs to the power electronic converter field. The energy Internet-based multi-port multi-bus electric energy router topological structure can be widely applied to power transmission and distribution ends. The electric energy router topological structure is divided into three parts, namely, a high-voltage end, a middle stage and a low-voltage end. The electric energy router topological structure specifically comprises a high-voltage alternating current power transmission end and three kinds of direct-current bus output ends of which the voltage levels are 600 to 800V, 350 to 400V and 48V respectively; and the electric energy router topological structure further comprises ports such as single-phase alternating current load output ends, three-phase alternating current load output ends and renewable energy and energy storage component access ends; and the core part of the energy Internet-based multi-port multi-bus electric energy router topological structure is a modular multi-level converter and a dual-active bridge bidirectional DC/DC converter. With the energy Internet-based multi-port multi-bus electric energy router topological structure of the invention adopted, energy bi-directional flow and multi-port multi-bus design required by an electric energy router can be realized, the connection of loads, power sources and energy storage devices of different voltage levels and forms can be facilitated, electric energy transmission efficiency can be improved, and large-scale production can be facilitated.

The invention relates to a multi-port power electronic convert for energy internet, and belongs to the technical field of power electronic converters. According to the invention, the converter is composed of one static synchronous series compensator, one static synchronous compensator, one DC-DC converter and one three-phase DC-AC inverter. The static synchronous series compensator and the static synchronous compensator are both formed on the basis of a modular multi-level converter. The DC-DC converter is formed by a plurality of isolated DC-DC converters which are subject to input series and output series, and shares a high-voltage DC bus with the static synchronous series compensator and the static synchronous compensator. According to the invention, the converter integrates the functions of a unified power flow controller and the functions of a power electronic transformer, thus having complementary advantages of the unified power flow controller and the power electronic transformer and reducing cost; the converter is modularized, is easy to expand and set with a backup, and has important application potential in future energy internet.

The present invention relates to an energy router for an energy internet, which comprises a three-phase three-level bi-directional rectifying unit, a six-phase interleaved DC/DC bi-directional conversion unit, a self-excitation soft start push-pull full-bridge DC/DC bi-directional conversion unit, a three-phase resonant soft switching bi-directional inversion unit, a single-phase full-bridge bi-directional inversion unit, a high-voltage DC bus and a low-voltage DC bus. The three-phase three-level bi-directional rectifying unit, the six-phase interleaved DC/DC bi-directional conversion unit, the self-excitation soft start push-pull full-bridge DC/DC bi-directional conversion unit, the three-phase resonant soft switching bi-directional inversion unit and the single-phase full-bridge bi-directional inversion unit each have three energy flow operating modes: a forward conduction, a reverse conduction and a non-conduction. According to the energy flow operating mode of each unit, different operating modes of the energy router for the energy internet are formed.

The invention relates to the technical field of energy internet planning, in particular to a game theory-based regional energy internet planning mathematical model and planning method, which comprisesthe following steps of: establishing a model of a distributed power supply, an energy storage system and a combined cooling heating and power system which are suitable for game theory planning and analysis; using A public energy operator, a service provider of distributed energy and a user as game participants, planning construction capacity, using pricing strategies and energy using behaviors asrespective decision variables, using the full life cycle income of equipment as earnings, and establishing different game models for regional energy internet planning; Establishing a specific game model under multiple modes according to the decision strategy of each participant; And carrying out solving through an iterative optimization algorithm, comparing and analyzing Nash equilibrium solutions under various game modes, and finally selecting the Nash equilibrium solution under the benefit maximization of all parties as a planning scheme of the regional energy internet.

The invention relates to a multi-class energy source pricing and energy management method of a park energy source internet operator. The method comprises the following steps: establishing a park energy source internet interaction frame containing an energy source supplier, a park operator and a user proxy; establishing a master-slave game model of the garden operator and the user proxy; convertingthe master-slave game model into a hybrid integer linear planning problem, and solving the problem. The park operator can formulate reasonable power energy, gas energy and/or heat energy price basedon the park actual energy supply and energy consumption status, perform collaborative optimization on a supply side, a transmission side and a demand side, and guide the user to adjust the demands ofdifferent types of energy consumption loads; and the P2G equipment and the V2G function can be jointly utilized to improve the capacity of absorbing the wind power in the park, the operator and the EVuser benefits are improved, and the total energy purchasing cost of the power/gas/heat user is reduced, the system load feature is improved, and the utilization efficiency of the energy source and the in-place absorptive rate of the renewable energy source generation are improved on this basis, and the park energy management efficiency is improved.

The invention discloses a method for evaluating the economic operation of an active distribution network based on an economic operation domain, which includes: defining 14 secondary evaluation indicators in the context of an energy Internet-oriented active distribution network, and comparing them with existing indicators Combined, according to the classification and processing of the characteristics of the new secondary indicators, four new first-level indicators are established, and an evaluation index system for the economic operation of the active distribution network oriented to the energy Internet is constructed, and some existing indicators are improved; the entropy weight method is used to correct , using the combination of subjective and objective weighting methods to improve the interval analytic hierarchy process, and as the weight calculation method of the present invention, using the methodology of "domain" in the distribution network security analysis to define the economic operation function and the economic operation domain; based on the economic operation domain Establish a model of each economic operation level of the active distribution network; judge whether the sample to be evaluated belongs to the corresponding level according to whether the economic operation function exceeds the limit.

The invention relates to a power transaction method based on a block chain, and belongs to the field of energy internet. According to the method, a power seller and a power purchaser are respectivelyused as a node, and N nodes jointly construct a block chain technical platform; an acknowledged master node is selected according to the voting system of the block chain, wherein the master node automatically formulates a power unit price according to the requirements of a power seller and a power purchaser; Transaction request data of the electricity seller and the electricity purchaser are sentto the block chain platform, and the data are stored in the block chain. Data interaction and storage of the electricity selling party and the electricity purchasing party pass through the block chainplatform, and after a transaction occurs, a result is stored in each node; And the transaction result notifies the power dispatching module to dispatch the electricity seller to the electricity purchaser, and the transaction is finished. According to the invention, the energy power transaction is more effective and reliable, the transaction is transparent, and the transaction information can be prevented from being tampered.

The invention discloses a blockchain-technology-based energy internet microgrid energy scheduling method. The method comprises the following steps that: a microgrid energy module enables all microgridnodes to form a peer-to-peer network; a blockchain system stored in the microgrid analyzes and predicts the power generation amount and power consumption amount of a next period by using the big data; a microgrid device with a built-in microgrid energy scheduling module sends energy supply and demand information to a blockchain node, and the peer-to-peer network verifies the energy supply and demand information sent by the microgrid device based on a consensus algorithm and returns the verification result to the microgrid energy scheduling module of the device; the built-in microgrid energy scheduling module matches energy information in the microgrid based on an optimal scheduling algorithm, writes the information into the blockchain, and generates a smart contract; and when the smart contract is determined to come into force, the microgrid carries out scheduling on the energy by combing a microgrid energy intelligent management module according to the energy information in the smartcontract. Therefore, technical problems that the future energy Internet demands can not be satisfied by the existing centralization-based transaction mode in the prior art and the like can be solved.

The invention relates to a multi-target run scheduling method for a micro-grid containing a hybrid energy storage system of an electric vehicle. The method is characterized by comprising the following steps of (1) constructing energy Internet on the basis of considering the electric vehicle as load and power generation units simultaneously and the combined heat and power heating benefit; (2) constructing a multi-target optimal scheduling model for the micro-grid containing the hybrid energy storage system of the electric vehicle according to the energy Internet and comprehensively considering economic and environment benefits to obtain target functions and constraints of the model; and (3) solving the multi-target optimal scheduling model for the micro-grid through an NSGA-II multi-target optimization algorithm to obtain a Pareto front solution, and obtaining an optimal run scheduling scheme for the micro-grid in 24 hours. In comparison with the prior art, the method has the advantages of good economic benefit and capabilities of improving the environment, reasonably distributing the output, carrying out peak load shifting and prolonging the service life.

The invention relates to an electric vehicle charging station planning method and a device. The method comprises the following steps: respectively building objective functions and constraint conditions of an electric vehicle user side and a charging station investor and operator side; simulating the traffic flow to get the driving path of an electric vehicle; and determining the optimal solutions to the objective functions. The electric vehicle charging station planning integrating the urban road network and the power distribution network is of great significance to the construction and comprehensive development of the energy Internet.

The present invention provides a multi-port energy router for a DC micro network, relating to the technical field of energy Internet control. The invention provides a new scheme for connecting distributed renewable energy power generation equipment, energy storage equipment and an electrical load to an energy Internet, and a new energy routing mode is provided. The energy router provided by the invention has multiple routing ports and can connect a variety of power generation equipment, energy storage equipment, electrical loads at the same time, the energy flow between different equipment is realized, and the energy utilization efficiency is improved. A multi-functional routing port is designed, the unification and standardization of the DC bus voltage of the energy router are facilitated, and different voltage level requirements are satisfied. The invention is applicable to the networking of the energy Internet, firstly distributed renewable energy generation equipment is connected to a low-voltage DC microgrid, and then according to the different voltages and power demands, after a commutation link, the equipment is connected to the DC and AC power grids with high voltage levels.

The invention discloses an energy internet safety intelligent trading system and a method thereof based on block chain technology. The system comprises a block chain energy trading platform, a terminal device, an energy scheduling system and a smart contract system. The terminal device and the block chain energy trading platform are in energy supply and demand information interaction; the block chain energy trading platform and the energy scheduling system are in energy supply and demand information and energy trading scheme interaction; and the block chain energy trading platform and the smart contract system are in intelligent contract information interaction. The trading system combines the block chain technology and a smart contract, and eliminates the role of a third-party trading center in the energy trading process; all participants in the trading are in equal status; and energy trading is executed automatically according to a preset smart contract.

The invention discloses an energy Internet construction method for improving energy use efficiency. The method comprises the following steps of constructing an energy Internet architecture physical network, constructing an energy Internet architecture information network, constructing an energy Internet architecture application platform and the like. On a layer of a physical network, energy production equipment, including a wind turbine generator, a photovoltaic power station, a combined cold heat and power supply unit, a ground source heat pump unit and the like, and cooling/ heating equipment, including a lithium bromide unit and the like are configured to carry out energy saving transformation on systems including illumination, water supply, elevators and the like, and the gradient utilization of energy, energy saving and loss reduction are realized. On a layer of an information network, the production, transmission and consumption state of the energy can be subjected to all-aroundsupervision and monitoring on the basis of an intelligent Internet of Things technology so as to realize a target of reducing manpower, lowering cost and improving energy efficiency. On a layer of anapplication platform, the complementary characteristics of a multi-energy supply system is used for coordinating and optimizing the supply of energy, including, coldness, heat, electricity, gas and the lie on the basis of meeting the energy utilization requirement of the user, the consumption of clean energy is accelerated, and the use efficiency of energy is improved.

The present invention belongs to the electric power system micro power grid technology field, in particular relates to a multi-energy complementary micro power grid energy management method containing multiple main bodies. In order to coordinate the decision main bodies in an energy internet, balance and optimize the benefits of the related parties, the present invention provides the multi-energy complementary micro power grid energy management method containing multiple main bodies. The method is characterized by utilizing a combined cooling heating and power system and a heat storage device, combining the user side electricity demand response and the heat demand response and the renewable energy source power generation, and comprehensively considering the factors, such as the user comfort degree, the optimization cost, etc., to construct a cooperative game composed of the members in a micro power grid, and adopting a Shapley value method to distribute the benefits according to the contribution degrees of the members. The method of the present invention aims to maximize the alliance benefit, guarantees the distribution fairness while realizing the maximum benefit, enables the benefits of the members in an alliance to be improved effectively, and provides an optimization method of lower cost and higher fairness for the economic operation of the multi-energy complementary micro power grid.

The invention discloses an energy internet collaborative optimization operation method. The method mainly comprises the following steps that a heat supply network and a power grid distributed energy optimization model are established with the lowest operation cost of a power grid and the lowest operation cost of the heat supply network as targets; a gas turbine is used as a coupling carrier of a heat supply network and a power grid, and the two regions are coupled through a coupling equation to form a distributed energy optimization model of the electricity-heat interconnection integrated energy system; the distributed energy optimization model of the electricity-heat interconnection integrated energy system is solved by adopting an improved synchronous ADMM algorithm, and the optimal distribution of controllable resources of a heat supply network and a power grid is obtained through repeated iteration. According to the invention, the gas turbine is used as electricity-heat coupling link, a node temperature transient equation is introduced on the basis of considering the existence of time scale difference in different energy utilization, the synchronous ADMM is used for carrying out collaborative optimization on electric energy and heat energy, the algorithm has good convergence, and the optimization result better conforms to the reality.

The invention relates to a big-data storage method based on a Neo4j graph database. A modeling manner of a public information model in a power system is used as a reference to uniformity model physical network topology of an energy internet system with the power system as a core; a topology model including comprehensive data of equipment configurations, machine accounts and geographic locations, real-time data of measurement, electricity prices and weather and relationships among the same is stored into the Neo4j graph database; and data such as history data and prediction data of which complex relationships with other objects in an energy internet do not exist are stored into a relational database, and location information of the relational database is stored in the graph database. According to the method of the invention, the respective advantages of the Neo4j graph database and the relational database are combined to carry out classified storage on big data in the energy internet, aPB-level amount of data therein can be effectively processed, and access efficiency of the data is improved; and at the same time, the storage manner is very good in extensibility, and has wide application prospects.

The invention discloses a source/network/storage/charge coordination management system for serving energy Internet and a method. The source/network/storage/charge coordination management system for serving the energy Internet comprises a source/network/storage/charge intelligent management system and a source/network/storage/charge Internet communication system; the internet communication system utilizes a communication network to realize collection and monitoring of system metadata and provides communication support to a control order of the intelligent control system; and the intelligent control system is designed to have a three-layer structure comprising a need layer, a state layer and a control layer. The balance of the need and the supply, maintaining of electric energy quality and management of need side can be achieved through configuring the source/network/storage/ charge comprehensive coordination control and optimization management. The invention provides a set of highly autonomous and fast respond energy management strategy to the energy interconnection and realizes the high efficiency utilization of the distributed power supplies under the architecture of the energy network.