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5457 results about "Distribution grid" patented technology

Distribution grid refers to the final stage of the electrical grid in which electricity is distributed to homes, industry, and other end use products. Distribution is the process of reducing power to safe customer-usable levels, and delivering the electric power to the grid.

Broadband access transmission network integrating the functions of electric power network, telecommunication network, tv network and internet

A broadband access transmission network integrating the functions of electric power network, communication network, TV network and Internet relates to network transmission. It includes a broadband transmission network of 10 KV power distribution network and a broadband transmission network of low-voltage power distribution network. These two transmission networks are connected via distribution transformers and optical fiber connectors. The broadband transmission network of 10 KV power distribution network is composed of optical compound power lines, wires, transformer substations, machine rooms, taps, insulating jackets, insulating waterproofing outer jackets and optical fiber connectors. The broadband transmission network of low-voltage power distribution network is composed of optical compound power lines, coaxial cable compound power lines, taps, insulating jackets, optical access points, distributors, modems and two-way amplifiers. The invention can perform high-speed broadband communication and power transmission on the same compound wires. It utilizes the existing power network sufficiently and prevents the cost of rebuilding the communication network, cable TV network and Internet, and can simultaneously perform building, operating, maintaining and managing of these networks.
Owner:WANG DEGING

Vehicle Electrical Power Management and Distribution

Vehicles, systems, and methods are disclosed for providing and directing first power, such as vehicle generator power, and alternate sources of power. In a particular embodiment, a vehicle includes a power distribution grid that includes a plurality of power sources and a plurality of distributions buses configured to distribute power from the plurality of power sources. The plurality of power sources include an engine-driven power source is configured to provide first power where the first power has first power characteristics. The plurality of power sources also includes a plurality of engine-independent power sources including a first alternate power source configured to provide first alternate power. The first alternate power has first alternate power characteristics that are different than the first power characteristics. The plurality of engine-independent power sources also includes a second alternate power source configured to provide second alternate power. The second alternate power has second alternate power characteristics that are different from the first power characteristics and different from the first alternate power characteristics. The vehicle also includes a global controller that sends control signals to control generation of power by the engine-driven power source, the first alternate power source and the second alternate power source via the plurality of distribution buses responsive to power demand of the power distribution grid.
Owner:THE BOEING CO

Power distribution network double layer planning method considering the time sequence and the reliability

The invention relates to a power distribution network double layer planning method considering the time sequence and the reliability. The method comprises: according to the meteorological files and the load power statistical data, obtaining the typical daily power time sequence curves of the wind electricity, the photovoltaic output and the load in different seasons; based on the opportunistic constraint planning method, creating a power distribution network framework and a distributed power capacity double layer planning mathematical model, including the objective function and the constraint condition; using the particle swarm optimization algorithm to solve the model and using the minimum spanning tree algorithm to ensure the radiation and connectivity structure of the distribution network during the iterative process; and obtaining the target network framework and the Pareto optimal solution set of the distributed power capacity so as to generate the best planning scheme. The invention solves the problems that unnecessary investment into the a power distribution network incurred by the fact that a traditional power distribution network planning method containing a distributed power supply cannot reflect the typical output characteristic of a distribution type new energy; and 2) that by incorporating the power distribution network power supply reliability into a model target function, the reliability target can be realized at the planning stage.
Owner:STATE GRID FUJIAN ELECTRIC POWER CO LTD +2

Power distribution network planning scheme assistant decision system

The invention relates to an assistance determination system of a distribution network programming proposal in a electricity technical field, which includes a data input and output module, a power-supply reliability index generation module, a power-supply capacity index generation module, a power-supply quality index generation module, a short-circuit electric-current level index generation module, a projected economy index generation module, an integrated index generation module, a module for analyzing preconceived accident and displaying an analysis report on the preconceived accident consequence and an inquiry module for an calculation result on the assessment index of the distribution network. The data input and output module is used for inputting the data of the distribution network proposal into each index generation module, and outputting the assessment index calculated by each index generation module. Each index is calculated by each index generation module through calling a topology analysis and a power flow calculation, and the analysis reporting module and the inquiry module carry out an analysis and a report to each module respectively. The invention finds out existing problems and weak steps of the projected proposal quickly and accurately, and provides scientific basis for a revise and an execution of the projected proposal.
Owner:SHANGHAI JIAO TONG UNIV

Assessment method of efficient operation of intelligent power distribution network

The invention relates to an assessment method of efficient operation of an intelligent power distribution network. The assessment method comprises the steps of: (1) determining boundary conditions; (2) determining service objects; (3) building an assessment index system which includes a power distribution network safety index, a power distribution network reliability index, a power distribution network economical efficiency index, a power distribution network high operation quality index and a power distribution network intelligence index; (4) determining assessment index numerical values of single items; (5) scoring for single items of assessment indexes; (6) performing comprehensive scoring of the assessment index system; and (7) judging whether efficient operation of the power distribution network is achieved according to a comprehensive score of the assessment index system in Step (6). The assessment method for efficient operation of the intelligent power distribution network in the invention has a relatively wide range of application, can comprehensively assess the operating state of the intelligent power distribution network, and an assessment result provides an importance basis for decision-making work of power grid dispatching, planning and operation management personnel.
Owner:CHINA ELECTRIC POWER RES INST +2

Medium and low voltage distribution network energy efficiency evaluation method based on accurate load measurement data

The invention relates to a medium and low voltage distribution network energy efficiency evaluation method based on accurate load measurement data. A complete set of whole-process comprehensive energy efficiency evaluation method for a static and dynamic distribution network is constructed in a distribution network energy efficiency evaluation system. Through the method, various attribute elements of the distribution network can be scientifically, integrally and comprehensively reflected. The system is clear in theory. Compared with the traditional energy-saving and loss-reduction modification measures only based on a quarter line loss method and a sweeping approach, the system has more scientificalness and pertinency and provides a brand new thinking and method for energy efficiency evaluation and energy-saving modification for the distribution network. The invention has a valuable reference to specific distribution network energy efficiency evaluation in various regions, makes pointed references to the distribution network planning and modification construction and also helps distribution network operating personnel master the operating condition of distribution network energy efficiency. Scientific and reasonable distribution network construction and modification projects can be instructed and arranged in actual evaluation and planning works, reliable and economic operation of the distribution network is ensured, and huge economic benefits are created.
Owner:CHINA ELECTRIC POWER RES INST +1

Dual-layer optimization method for power distribution network expansion planning and light storage locating and sizing

The invention discloses a dual-layer optimization method for power distribution network expansion planning and light storage locating and sizing. The method comprises the steps of building an upper-layer optimization model for active power distribution network expansion planning: determining a target function and constraint conditions of the upper-layer model; building a lower-layer optimization model for light storage capacity configuration: determining a target function and constraint conditions of the lower-layer model; and solving the upper-layer model and the lower-layer model: executing an upper-layer model optimization method, a lower-layer model optimization method and a dual-layer optimization method. According to the method, the built dual-layer optimization models taking a distribution network enterprise and users as subjects and taking calculation of optimal economic cost as a target comprehensively analyze economic influence of light storage system access and power distribution network expansion planning on the distribution network enterprise and the users; a planning model taking annual cost expense as a target function can well assess the economy of a power distribution network; and the light storage system can be reasonably configured, so that the power purchase costs of the users are effectively reduced, the on-spot consumption of photovoltaic energy is increased, and the network loss of a power distribution system can be effectively reduced.
Owner:TIANJIN UNIV

RT-LAB based microgrid simulation testing system

The invention discloses an RT-LAB based microgrid simulation testing system. The system comprises an RT-LAB simulation system, a DSP physical system, a power amplifier, a microgrid physical simulation system and a microgrid monitoring system; the RT-LAB simulation system is used for building microgrid and distribution network simulation models and providing a real-time simulation environment; the DSP physical system is used for producing a control signal to a converter circuit built in the simulation system; the power amplifier is used for connecting the RT-LAB simulation system and the microgrid physical simulation system; the microgrid physical imitating system is used for forming a digital physical microgrid with the RT-LAB simulation system and accepting the monitoring and dispatching control of the monitoring system; the microgrid monitoring system is used for monitoring the DSP physical system, a microgrid digital simulating model and the physical simulation system. According to the system, the microgrid and distribution network simulating models are built on the RT-LAB, the microgrid physical simulation system is provided, so as to truly simulate the running states of a power system and the microgrid; the system has the advantages of real-time simulating, online parameter adjusting, and being rich in interfaces, rich in testing type, flexible to switch the testing mode, simple to operate, safe and reliable, efficient and economical.
Owner:GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI

Evaluation method for distribution network reliability

The invention relates to an evaluation method for distribution network reliability, comprising the following steps: (1) transferring evaluation of the distribution network reliability to analysis on the distribution network blackout power factors, and carrying out decoupling treatment on the distribution network blackout power factors; (2) using an analytic hierarchy process (AHP) to establish an evaluation system of distribution network reliability; (3) establishing a comprehensive quantitative model of the distribution network reliability; (4) formulating an evaluation standard of the distribution network reliability; and (5) specifying weight indicators of the distribution network reliability. In the method, the evaluation theory of the distribution network reliability is combined with an actual power grid, so that the evaluation of the distribution network reliability is transferred to the analysis on the distribution network blackout factors and the evaluation system, the evaluation model, the evaluation standards and the evaluation indicator weights of the distribution network reliability are established, thus enabling to reflect the existing reliability level of the distribution network from a plurality angles, thereby playing a huge role in works, such as related decisions, high-reliability power supply area distribution network plans and the like on evaluation of the distribution network reliability, formulation of high-reliability distribution network establishment principle and establishment direction, and the like.
Owner:STATE GRID TIANJIN ELECTRIC POWER +1

Fault positioning method for power distribution network by combining simulation calculation and real-time monitoring

The invention discloses a fault positioning method for a power distribution network by combining simulation calculation and real-time monitoring, and belongs to the technical field of fault detection of the power distribution network. The method comprises the following steps of: extracting information of a target power distribution network from the conventional power distribution network geographic information system and a power distribution network energy management system through an organizational data analysis interface to automatically generate a real-time simulation calculation model of the target network; putting forward a virtual node-based fault positioning algorithm according to the simulation calculation model so as to solve functional relation between voltage amplitude of any node and a fault position parameter when a symmetric and asymmetric fault occurs at any point in the target network; and finally calculating an accurate position of the actual fault of the power distribution network by using a small amount of real-time data of voltage drop amplitude in a fault process. By using the fault positioning method for the power distribution network by combining the simulation calculation and the real-time monitoring, the state and the parameter of the network are accurately and effectively reflected when the fault occurs, the accuracy of the fault positioning is improved, and the method is suitable for various network structures and fault types.
Owner:STATE GRID CORP OF CHINA +1

Optimization method of network variable structure with distributed type power supply distribution system

The invention discloses an optimization method of a network variable structure with a distributed type power supply distribution system. The optimization method includes that basic static data of electric power network structure parameters, distributed type power supply distribution, load capacity, faulty lines and the like are extracted, under the condition of present line fault, the basic static data are utilized to perform islanding scheme calculation and correction, survivability indexes constructed by the method are combined to perform an online evaluation for islanding network safe operation performances and implement immediate control measures, finally, on account of residual network structure data after final islanding electric power network division is performed, by means of an ant colony algorithm, a reconfiguration optimal computation is performed for residual network with minimum network loss as a target, and finally the electric power network structure with high safe operation level is obtained. On the basis of the developed algorism and function modules, the invention further provides a large-scale power distribution network intelligent optimization decision system based on multi-stage computation correction and survivability evaluation, according to the technical scheme, the division and reconstruction of the network with the generalized model distributed type power supply distribution system are achieved, and accurate reference of network structure adjustment, schedule and operation can be excellently provided for regional electric power network schedule staffs.
Owner:SICHUAN UNIV

Failure propagation method for evaluating reliability of distribution network

The invention provides a failure propagation method for evaluating the reliability of a distribution network, and relates to a method for evaluating the reliability of a medium voltage distribution network which runs radially. The method uses a computer to perform the enumeration calculation on a failure event of each element in the distribution network by a state enumeration method through a program, and performs the power flow calculation of the distribution network and the reliability index calculation of the distribution network for output. In the method, a reliability index of the distribution network can be formed at one time, the reliability of distribution networks with a simple structure and a complex structure with a subfeeder can be calculated, the influence of a breaker, branchline protection, an isolation switch, a standby power supply, a standby transformer and the like in the distribution network is taken into consideration, and a model has good commonality, high calculation speed and strong engineering practicability, and is easy to popularize and apply. The method can be widely applied to the reliability evaluation of the distribution network, and is particularlysuitable for the reliability evaluation of the distribution network between 3 and 20kV.
Owner:CHONGQING UNIV

Distribution network ground fault arc suppression method based on three-phase cascade H bridge converters

The invention relates to a distribution network ground fault arc suppression method based on three-phase cascade H bridge converters. The three-phase cascade H bridge converters are adopted to replace arc suppression coils and mounted between phase lines and the ground, and power is supplied to capacitors on the direct current side of the converters by using phase voltages, so that boosting transformers and grounding transformers are saved, and the problem of source taking difficulty on the direct current side of the converters is solved. The converters inject current to a distribution network in a phase splitting mode to compensate the total current of a ground fault to be zero or to inhibit the phase voltage of the fault to be zero, so that the arc is automatically extinguished; and the reference compensation current is calculated by using real-time measured zero sequence voltage, so that the fault phase identification link is saved. The operation is simplified by using the voltage arc suppression method of controlling the zero sequence voltage to adjust the injected compensation current. In view of the influence of circuit parameters and load current on the arc suppression effect and the deduced relation between the ground fault residual current after the voltage arc suppression method is applied and the zero sequence voltage after the fault, an adaptive arc suppression method is put forward by using the zero sequence voltage as a voltage and current arc suppression method.
Owner:SHANGHAI HOLYSTAR INFORMATION TECH

Comprehensive monitoring system of power distribution network based on the internet of things and intelligent patrol robot

The invention discloses a comprehensive monitoring system of a power distribution network based on the internet of things and an intelligent patrol robot. The system comprises a monitoring system, an intelligent patrol robot, a background management platform and a remote receiving terminal. The monitoring system comprises an environment monitoring system, an anti-theft monitoring system, a fire-fighting monitoring system, an entrance guard management system, a ring network cabinet monitoring system and a related linkage device. The monitoring system is in communication connection with the background management platform through an intelligent acquisition device. The background management platform sends out a control instruction and controls the working state of the related linkage device through the intelligent acquisition device. The intelligent patrol robot and the remote receiving terminal are in communication connection with the background management platform. According to the technical scheme of the invention, the intelligent routing inspection of a substation and the centralized monitoring and management of an on-site environment, anti-theft equipment, fire-fighting equipment and a ring main unit are realized. Therefore, the linkage device is intelligently controlled, and potential fault risks are prevented in advance. Moreover, an occurred fault can be quickly and accurately judged and treated. Therefore, the safe and stable operation of the power distribution network is ensured.
Owner:STATE GRID CORP OF CHINA +2

Automatic switching system from geographical wiring diagram of distribution network to single line diagram

The invention relates to an automatic switching system from a geographical wiring diagram of a distribution network to a single line diagram; the system comprises a vector drawing tool of a single line diagram of a distribution network, which faces to a graphic object; the system also comprises a point arc model data structure, a breadth-first ergodic topology algorithm, an electrical primitive layout based on labyrinth algorithm, and elimination of primitive or line overlapping and intersection. A distribution network model based on CIM is proposed on the basis of geographic information of the distribution network by combining the vector drawing tool of the single line diagram of the distribution network, and automatic switching from the geographical wiring diagram of the distribution network to the single line diagram is realized according to the geographical wiring diagram of a distribution network to a single line diagram among geographical wiring diagram equipment by the labyrinthalgorithm and the method of eliminating overlapping and intersection method, thereby greatly reducing the working load of maintenance personnel of the single line diagram, eliminating the hidden trouble of inconsistence of data and diagram and improving the working efficiency of distribution departments and reliability of a power system in the practical application.
Owner:JIANGXI JIUJIANG POWER SUPPLY +1

Power distribution network single-phase disconnection judging and addressing method based on load measuring and recording system

The invention relates to a power distribution network single-phase disconnection judging and addressing method based on a load measuring and recording system. The method comprises the following steps of: I, mounting a load measuring and recording system on a power distribution network feeder line, and acquiring the values of three-phase voltage, current and 3V0 of a pole-mounted transformer from the load measuring and recording system mounted on the power distribution network feeder line at regular time; II, comparing the voltage and current values acquired from the load measuring and recording system mounted on the power distribution network feeder line with the voltage and current values of a power distribution network single-phase disconnection fault database to judge the disconnection fault type; and III, in combination with the single-phase disconnection fault type judged in the step II, performing single-phase disconnection fault addressing by a forward sweeping method or backward sweeping method based on the load measuring and recording system, and performing fault treatment. Compared with the prior art, the method provided by the invention has the advantages that: the correct judgment of the power distribution network single-phase disconnection fault phase and the effective addressing of the fault position can be performed based on the measured data of the load measuring and recording system in combination with the power distribution network single-phase disconnection fault database and the like.
Owner:SHANGHAI JIAO TONG UNIV +1

Logistics distribution management system and logistics distribution management method

The invention provides a logistics distribution management system and a logistics distribution management method. The system comprises a data server, a logistics distribution monitoring module and a plurality of intelligent mobile terminals, wherein the logistics distribution monitoring module is used for dividing a distribution area into a plurality of distribution grids, determining the distribution grids corresponding to the addresses of customer orders, generating and sending the logistics distribution information to the intelligent mobile terminals corresponding to the distribution grids; the intelligent mobile terminals are used for receiving the logistics distribution information, generating signing information and delivery information of goods, and sending the signing information and delivery information of goods to the data server; the data server is used for acquiring the signing information and delivery information of goods in the logistics distribution process. According to the logistics distribution management system and the logistics distribution management method provided by the invention, the distribution areas are divided based on a grid mode, and the logistics distribution in each distribution area is subjected to intelligent route optimization, so that the distribution is more flexible and varied, the unnecessary distribution cost is greatly reduced, the logistics distribution efficiency is improved, and the customer experience is greatly promoted.
Owner:SHANGHAI XINYUE LOGISTICS ENTERPRISE MANAGEMENT
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