34 results about "Advanced Distribution Automation" patented technology

The invention discloses an intelligent cell total management system. By adopting an EPON optical network, through a power line compound optical fiber and an EPON technology, integration services of three networks such as a television, a telephone and an Internet are realized, functional intelligent management such as power distribution automation, distribution power comprehensive monitoring, distributed power supply access and control, three-network integration service, power utilization information acquisition, electric vehicle ordered charging, intelligent home and the like are realized, the safety in a cell is effectively enhanced, the working efficiency of workers is increased, the operating state of public equipment is monitored in real time, normal operation of the public equipment is ensured, and the property management level is increased. An electricity meter, a water meter, a gas meter and the like are remotely read, the convenience is achieved in an operator; and the simpleness, the safety and the reliability are achieved in operation; and an intelligent home system realizes humanized intelligent home control by adopting an intelligent device according with the standard of an Internet of things, and provides a safe, comfortable and convenient for each cell and easy family.

The invention relates to a fast detection method for potential safety hazards of power distribution automation system information. The fast detection method comprises the steps of master station configuration of a power distribution automation system, encryption module configuration, terminal configuration of the power distribution automation system, corresponding testing and evaluating tool selection according to testing and evaluating objects, security risk assessment of the power distribution automation system information, and termination after all the potential safety hazards are solved. According to the fast detection method, all the functions of the power distribution automation system can be simulated, a plurality of power distribution terminals can be detected at the same time, the automation degree in the testing and evaluating process is high, the investment of personnel and equipment in the testing and evaluating process can be effectively reduced, potential safety hazard checking equipment can be selected selectively, and comprehensive safety risk detection of the system can be achieved.

A general decentralized voltage control scheme is proposed to coordinate the operation of DG, Voltage regulator and Capacitor banks. The present invention is based on placing a Remote Terminal Unit (RTUs) at each distribution generation (DG) and each at line capacitor. These RTUs being coordinated together through communication protocols form a multi-agent system. Novel decentralized system is proposed to estimate the voltage profile change as a result of injecting reactive power at the capacitor bus. Simulation results are presented to show the validity and the effectiveness of the present invention.

The invention discloses a diagnosis method for a pre-channel fault of a power distribution automation system. The method comprises the steps of allowing a power distribution automation master station system to monitor an operation state of a power distribution terminal, allowing a communication network management platform to monitor a state of an intermediate link communication equipment, combining communication network management data and the operation state of the power distribution terminal, performing real-time monitoring and management on the power distribution terminal, communication access network equipment, an optical cable and a communication channel resource within the jurisdiction of the power distribution automation system, performing fault analysis and positioning on a communication abnormity state of the power distribution terminal, and issuing a communication abnormity report of the power distribution terminal. The method can find a cause of the pre-channel fault more comprehensively, achieves accurate positioning of a fault node, significantly improves the defect elimination management efficiency of operation and maintenance personnel for the power distribution terminal and communication, and further ensures stable operation of a power distribution network.

The invention relates to the field of power system and automation, in particular to a power distribution network terminal access method based on the IEC61850 standard. The method includes the following steps that (1) a power distribution terminal gets access to a port of a program monitoring UDP networking protocol, and data packages are broadcast, found and registered at regular intervals; (2) whether the correlation function of the power distribution terminal passes audits or not is judged; (3) access to the web service port of the power distribution terminal is carried out, and configuration information of the power distribution terminal is obtained; (4) a point table of measure points is generated from the configuration information; (5) the generated point table of the measure points is applied to a distribution automation system. The whole process of the power distribution network terminal access is automatic without manual intervention, namely the power distribution network terminal is of a plug-and-play type, workload of distribution automation and possibility of error occurrence are greatly reduced, implementation difficulty and implementation cost of the distribution automation are reduced, the construction of the distribution automation is promoted, and working efficiency and working correctness of the distribution automation are improved, so that the level of distribution network automation operation is improved, and outage cost is reduced.

The invention relates to a distribution production and marketing business integration system which is mainly technically characterized by comprising a distribution automation system, a customer service GIS (Geographic Information System), an urban GIS, a production management system, a power utilization collecting and marketing system and a data center, wherein the distribution automation system is connected with the customer service GIS, the urban GIS and the data center through an information exchange bus and an information exchange gateway to send distribution automation information thereto; and the customer service GIS, the urban GIS, the production management system, the power utilization collecting and marketing system and the data center are connected to perform data exchange on various kinds of information. In the invention, related professional data of the distribution field is effectively integrated, and all data can be shared in the whole system after one-step establishment, thereby avoiding repeated establishment, saving labor cost, improving the working efficiency, facilitating comprehensive analysis of the operation conditions of the distribution network, and providing detailed and accurate basis for fault treatment and planning research.

The invention provides a typical test network with power distribution automation, which comprises three transformer substation 10kV buses, three 10kV outgoing lines, three transformer substation 10kV outgoing line switches, 14 power distribution section switches and three power distribution interconnection switches, wherein the components are combined into four network states such as a multi-power-supply latticed power supply network which comprises a looped network and a radiation circuit, a network which is provided with a faulted power supply and transfers the power through other power supplies, a network which is provided with a faulted circuit and transfers the power through the other power supplies, a network which is provided with a faulted radiation circuit and only needs failure isolation and the like by utilizing the on and off of the switches. The network provided by the invention can simulate four conditions which usually occur in the engineering such as partial communication interruption, power distribution terminal misinformation or failure information omission, switch operation failure, switch operation refuse and the like and can be used for verifying the failure positioning practice functions of a power distribution automation system. The network provided by the invention has the advantages that the number of the needed power supplies and switches is appropriate; and the structure is concise and practical, and is suitable for the establishment of a test network based on real equipment.

The invention discloses a visual display method of power distribution network fault positioning based on a power grid GIS (geographic information system). The method includes the steps: acquiring data information of a power distribution automation system, a production management system, a distribution network production first-aid repair command platform, a power utility information acquisition system and the like by the aid of integrated functions of an intelligent power grid visualization platform; performing accurately positioning for switch fault points in the power grid GIS when faults happen through visualization based on the power grid GIS. Operators on duty rapidly respond and make decisions when encountering the faults, data of the power distribution automation system, the power utility information acquisition system and the distribution network production first-aid repair platform are deeply excavated and integrated, the power grid GIS serves as a carrier, the faults are accurately positioned through visualization technologies and device matching technologies, modernization requirements for power grids of electric power enterprises and wide users can be met, information management level of the electric power enterprises is improved, and the visual display method has a good application prospect.

The invention relates to a distribution automation system based ground fault line selection method belongs to the field of power system distribution automation. The method comprises the following steps: a distribution automation main station system receiving such multivariate data as a line selection result of an EMS, transformer station remote measurement remote signaling data, machine accounts and the like; the distribution automation main station system, when receiving line selection signals of bus grounding, feed line grounding and an arc extinguishing apparatus, starting ground determining; the distribution automation main station system discriminating a ground fault through waiting for basic data of collection full-ground line selection; the distribution automation main station system, according to machine account data, generating a low-current ground fault switching-off sequence table of a ground station; and the distribution automation main station system sending information of the ground station and the switching-off sequence table to a man-machine interface to display the information so that a dispatcher can use the information and the table. By use of the distribution automation system ground fault line selection method, the effectiveness and the intelligence in a ground fault first-aid repair process are improved, and the work efficiency of first-aid repair of a distribution network is greatly improved; and the method has great significance for reducing power failure influences and improving power supply reliability.

The invention discloses a feeder automation test system with an automatic interference input function. The feeder automation test system is connected with a power distribution network which comprises a power distribution terminal and a relay protector. The power distribution terminal and the relay protector respectively comprise a telemetering module, a remote signaling module and a remote control module. The feeder automation test system comprises a plurality of feeder automation testers and a console, wherein the feeder automation testers are respectively connected with the power distribution terminal or the relay protector, and the console is connected with all the feeder automation testers through a network system. The feeder automation test system is used for verifying the power distribution terminal deployed on site or the relay protector deployed on site and feeder automation processing logic of the power distribution terminal or the relay protector, whether a power distribution automation system which is deployed under the normal condition can process various faults correctly can be tested, the problem that fault coverage expansion is caused by the deployed power distribution automation system in the fault processing process under different interference conditions can be verified, and power supply reliability and power supply quality are greatly improved.

The invention discloses a power distribution automation three-remote function closed-loop test system and method. The system comprises a three-remote test workstation, a three-remote tester, a power distribution automation terminal and a power distribution network automation master station, wherein the three-remote test workstation is used for acquiring three-remote configuration parameter information from the power distribution network automation master station and transmitting generated three-remote test case parameter information to the three-remote tester, the three-remote tester is used for transmitting on-off state information and analog quantity to the power distribution automation terminal, the power distribution automation terminal generates SOE (sequence of event) information after operation, transmits the SOE information to the power distribution network automation master station, the power distribution network automation master station transmits the SOE information to the three-remote test workstation, the power distribution automation terminal transmits the SOE information to the three-remote tester, the three-remote tester transmits the SOE information to the three-remote test workstation, and finally, the three-remote test workstation generates a three-remote test report. Technical requirements for on-site constructors are reduced, on-site installation and commissioning workload is greatly relieved, and maintenance efficiency is improved.

The invention provides a power distribution automation system assessment method and apparatus. The method comprises the steps of automatically obtaining a real-time communication message between a master station and a terminal in a power distribution automation system; according to a preset rule, performing analysis on the real-time communication message to obtain an analysis result; and assessing a state of the power distribution automation system according to the analysis result. By adopting the scheme, the problem of low assessment efficiency of the power distribution automation system in related technologies is solved and the assessment efficiency of the power distribution automation system is improved.

The invention relates to the field of electric power terminals, and especially relates to a power distribution terminal operation and maintenance management system. An existing distribution network communication network is used to realize operation and maintenance management of a distribution terminal. Through the utilization of a power distribution terminal management protocol, running state information of a power distribution terminal device and correlated analog quantity information are collected. According to a preset processing rule, processing is carried out on the device running states of different categories, and corresponding device state report forms are generated for device operation and maintenance personnel to carry out assessment on the states of the device in order that maintenance strategies can be determined. At the same time, as for distribution network reconstruction, capacity expansion and distribution terminal fixed value modification, etc., through the utilization of the distribution terminal operation and the maintenance management system, the operation and maintenance personnel can carry out fixed value setting on the power distribution terminal in the distance. On-site maintenance is avoided. The power distribution terminal operation and the maintenance management system are very time-saving and the practicality of a power distribution automation system can be raised.

The invention discloses a three-dimensional urban power supply service command center data visualization method, and relates to a data visualization method. The three-dimensional urban power supply service command center data visualization method, carries out big data analysis on the business data in a database, integrates multi-source business system information such as power distribution automation, power distribution network first-aid repair, dispatching automation, a production management system, a marketing management system, video monitoring and the like, realizes three-dimensional virtual modeling of a power protection area, and integrally displays information such as a power protection scheme, an important user power supply path, an important user wiring mode, a power protection area main grid frame, a power protection area distribution grid frame and intra-station and extra-station monitoring videos. The three-dimensional urban power supply service command center data visualization method has the functions of data collection of a three-dimensional city, generation of a building model, monitoring of the operation state of power distribution network equipment based on the three-dimensional city, display of the emergency repair and power maintenance state of the power distribution network, emergency command and the like. The three-dimensional urban power supply service command center data visualization method comprehensively considers data integration linkage, completes screen direct monitoring, and displays statistical analysis conditions in real time.

The invention relates to a distribution network automatic local control and centralized control combination optimization method. Short time delay is added to the quick-breaking moment of a transformersubstation switch, and a feeder line switch has voltage-time isolation and switch-on quick-breaking functions; next, an inquiry mechanism is established between an automatic system main station and an on-site terminal; and when the on-site terminal plans to perform automatic action, the on-site terminal inquiries permission from a background, and if there is no definite opinion received from thebackground within a specific time fame, the on-site terminal selects to perform automatic action. The optimization method has the following advantages as follows: by adoption of a comprehensive protection system which combines a V-T-I mode and a concentrated type mode adopted by power distribution automation modification, effective fault isolation and power supply recovery of a non-fault region can be realized within the shortest time frame, so that the shortcomings of main station erroneous judgment and feeder line automation failure caused by communication faults can be overcome, the power supply reliability is improved substantially, and forceful reference is provided for construction of power distribution automation; and meanwhile, work amount of one time of system modification can bereduced, and relatively high cost advantage is achieved.

The invention, which relates to the field of power distribution automation, discloses a method and system for updating power distribution automation graph-model interaction point table information sothat each piece of ''three remote'' point information is verified accurately under the circumstance that the normal operation of the system is not affected to realize stable transition from an old power distribution automation system to a new power distribution automation system. According to the invention, data of an old power distribution automation system are copied to a new power distributionautomation system and association configuration is carried out on the new power distribution automation system according to a new graph model; the old power distribution automation system and the newpower distribution automation system are connected to a same simulation terminal and the simulation terminal carries out remote control, telemetering, and remote signaling data transmission with the new power distribution automation system and the old power distribution automation system simultaneously; and a data comparison module is used for verification and an error location is localized, a user is guided to modify the new power distribution automation system, a pre channel of the old power distribution automation system is switching to the new power distribution automation system after determination of complete consistence of two systems.

The invention discloses a power distribution network high-reliability self-healing method and system. The method comprises the following steps: a power distribution automation system judging whether apower distribution network line has a fault or not, and positioning a fault interval of the power distribution network when the power distribution network line has a fault; carrying out primary superposition on the faulted power distribution network line, and repositioning the fault interval of the power distribution network again; when the fault intervals of the power distribution network positioned for the two times are the same, the power distribution automation system adopting a self-healing control strategy to isolate the fault section of the power distribution network, meanwhile guidingthe non-fault intervals of the power distribution network into adjacent power distribution network lines, when the fault intervals of the power distribution network positioned for the two times are different, the power distribution automation system not executing a self-healing control strategy. The method and the system can realize accurate positioning of the fault intervals of the power distribution network and further realize high-reliability self-healing of the power distribution network.

The invention relates to a test system of a master station of a power distribution automation system, belonging to the technical field of power distribution network test. According to the invention, aplurality of workstations are built by using a cloud platform technology, and the operating system, the environment variable and the application program of each built workstation are automatically configured, so that the time for building a multi-workstation test environment is greatly saved; load test examples of automatic test are located at each workstation at the end of the cloud platform workstation, and the automatic test for the interface operation and the performances can be performed. According to the means mentioned above, the problems are solved that the test environment of the existing power distribution automation main station system is complex to build, and the automatic test reliability and the execution efficiency are low.

The present invention provides an abnormal alarm method for a distribution automation system and an abnormal alarm device for a distribution automation system. The abnormal alarm method provided by the invention comprises: (A) performing real time receiving and statistics received categories and quantities of each fault signal at present; (B) respectively determining the classification of each fault signal received in the step (A) according to a preset fault signal classification; (C) respectively calculating the quantity of fault signals in each preset fault signal classification according to the determination result; and (D) performing alarms in different modes of each fault signal classification according to each quantity and the preset fault signal classifications. The abnormal alarm device provided by the invention comprises housing and a vibrator, the housing is provided with a USB interface and a group of indicating lamps with different colors, and the housing is internally provided with a controller. According to the invention, workers' labor intensity is reduced, workers' work efficiency is improved, and the overlook phenomenon of abnormal faults is avoided.

The invention discloses a distribution network fault early warning method and system facing a power distribution automation uncovered region. The method comprises the steps of: acquiring primary network frame information of a power distribution network in the region from a dispatching automation system D5000 and a power utilization information management system; predicting a theoretical load current of a branch line and predicting a theoretical load current of a power supply point; carrying out differencing on a real-time load current of the branch line and the theoretical load current of thebranch line, carrying out differencing on a real-time load current of the power supply point and the theoretical load current of the power supply point, respectively comparing difference values to corresponding thresholds, and if the difference values exceed the thresholds, determining that the corresponding branch line or power supply point has a trip-out fault. According to the distribution network fault early warning method and system facing the power distribution automation uncovered region, which are provided by the invention, distribution transformation information in the dispatching automation system D5000 and a power utilization information acquisition system is utilized, the switch trip-out fault of the power distribution network is timely determined and positioning and warning are carried out, so that combined utilization and integration of resources are implemented.

The invention provides an intelligent distribution network safety access platform and an implementation method thereof. The platform comprises a power distribution main station, a power distribution safety access gateway, a data isolation assembly and a power distribution terminal, a safety chip is embedded in the power distribution terminal. The power distribution main station, the data isolationassembly, the power distribution safety access gateway and the power distribution terminal are in communication connection in sequence. The power distribution main station initiates a connection request to the acquisition server through the data isolation assembly, the acquisition server sends the connection request to the power distribution terminal through the power distribution security accessgateway, and the power distribution security access gateway establishes connection with the power distribution terminal and performs security negotiation with the power distribution terminal. According to the platform, the construction and safety protection process of the distribution automation service system is accelerated, the stable transition of new and old distribution main stations and terminals is facilitated, the information safety protection level of a company production management area and a management information area is maintained on the basis of meeting the information safety protection requirement, and the safety of the distribution automation system is ensured.

The invention discloses a power distribution automation and operation management system and a control method thereof. The power distribution automation and operation management system comprises a power distribution automation master station system, a power grid data acquiring and monitoring system, a power distribution geographic information system, a demand-side distribution system and a solar power generation management system, wherein the power grid data acquiring and monitoring system comprises a power grid load monitoring system and a solar power generation unit load acquisition system which are connected with the power distribution automation master station system through optical fibers and power distribution terminal units, the demand-side distribution system comprises a plurality of power distribution stations which are connected with the power distribution automation master station system through optical fibers and power distribution terminal units, and the solar power generation management system comprises a plurality of solar power generation units which are connected with the power distribution automation master station system through optical fibers and power distribution terminal units. The power distribution automation and operation management system and the control method thereof have the advantages that power supply utilization ratio of the solar power distribution units is increased substantially, so that power supply and power distribution of a power grid are optimized, and further, overall efficiency of the power grid is improved.

The invention relates to a distribution automation communication method based on code division multiple accesses technology. The distribution automation communication method based on code division multiple access technology is characterized in that the method includes a downstream communication method from a distribution automation main engine to a remote terminal unit and an upstream communication method from the remote terminal unit to the distribution automation main engine; the distribution automation main engine is connected with a CDMA gateway, the remote terminal unit is connected with the grouping assembly and disassembly of equipment of CDMA users; the downstream communication method adopts a communication mode of from-modem-to-modem; the upstream communication method adopts an interworking function communication mode. The CDMA gateway and CDMA PAD are additionally arranged between the distribution automation main engine and the remote terminal unit. Network resource occupied by the downstream information is little and a regular polling function of the CDMA PAD can be achieved conveniently. When the upstream information transfers, communication priority and reliability are high; breaking information can be preferentially accepted and processed; emergency can be ensured to be handled at first time; high-speed and effective wireless transmission of the distribution automation can be achieved.

The invention discloses an automatic verification assembly line work method for a remote communication and measurement basic-type power distribution terminal. The implementation steps include arranging a plurality of conveying lines and a plurality of verification stations and mechanical arms in advance, placing a to-be-verified power distribution terminal on the first conveying line, grabbing theto-be-verified power distribution terminal from the first conveying line by a mechanism arm and placing to a verification station for verification, conveying the to-be-verified power distribution terminal to the next station if the verification passes until the end, and implementing packaging and qualification label sticking and outputting; if verification on any station does not passes, outputting directly. By adopting the method provided by the invention, capability of batch detection of remote communication and measurement basic-type power distribution terminals can be improved substantially, field operation reliability of the remote communication and measurement basic-type power distribution terminals is ensured, power failure accidents caused by faults can be reduced, power interruption time can be reduced, power supply reliability is improved, power distribution automation is promoted effectively and safe and stable operation of a power distribution network is ensured.

The invention discloses a power distribution automation system security defense platform and method. The platform comprises a protocol dispatcher, a virtual operating environment, a conventional operating environment, a first power distribution automation system operating in the virtual operating environment, a second power distribution automation system operating in the conventional operating environment, a power distribution automation system terminal and a real-time database. By constructing a distribution automation safety access environment with a safety switching function and analyzing aterminal access protocol, possible dangerous attack behaviors are prevented, a safety defense mechanism is executed, and the safety access problem of the distribution automation terminal is solved.

The invention relates to a modeling method of a low-voltage distribution network with a distributed power supply. The modeling method includes the steps that a distributed power supply model in a low-voltage distribution network model is established; a distribution transformer combination model in the low-voltage distribution network model is established; a low-voltage transformer substation model is established in the low-voltage distribution network model; topology association and measurement data points between the low-voltage distribution network model and a medium-voltage distribution network model are set; low-voltage distribution network measurement data are acquired and mapped into the established low-voltage distribution network model; the low-voltage distribution network model is checked through topology verification. Thus, while the influence on the functions of an existing power distribution automation system is minimum, the low-voltage power grid model with the distributed power supply is introduced, so that modeling of the low-voltage distribution network meets the actual situation better, and power distribution equipment is more convenient to manage and maintain. The calculated amount is reduced in the processing process, and system resources are saved.

The invention discloses a power distribution automation measurement completion method based on measurement data, and belongs to the technical field of electric power engineering data processing. According to the method, according to a fracture surface file of distribution transform data in a measurement system, power distribution load current is calculated, a historical database of a power distribution automation system is updated, a distribution transform load feature curve is predicted according to the historical database updated by the power distribution automation system, the distributiontransform current load current is estimated according to the obtaining moment of the fracture surface file and the distribution transform load feature curve, the features of feeder electric equipmentare considered, the sum of all distribution transform current load currents within the current immeasurable feeder line critical measurement position power supply range serves as measurement data of the current immeasurable feeder line critical measurement position, through effective utilization of measurement data, data completion of feeder immeasurable key positions is achieved, the visible degree of the power distribution automation system is increased, and distribution network dispatching personnel conveniently know the running state of a power distribution network comprehensively.

The invention discloses a fault handling method of distribution automation equipment in a distribution system. The method comprises: a communication network is constructed by using all distribution network management equipment in a distribution network as nodes; an upstream and downstream relation of all distribution network management equipment in the distribution network is determined; a fault report is generated; according to the fault report, a substitute distribution network structure with fault equipment and / or line shielded is constructed; combination ways of on-off states of all loops and / or distribution automatic terminals during construction of the substitute distribution network structure in the distribution automation system are calculated and a corresponding control instruction is generated; and according to the control instruction, the on / off state of the corresponding distribution automatic terminal is controlled. Therefore, the real-time and automatic maintenance operation for a fault can be realized without manual intervention by the maintenance staff, so that the maintenance performance of the distribution network can be improved substantially.

The invention provides an adaptive method of a network topology for differential protection parameters of a smart power distribution network. The adaptive method of the network topology for the differential protection parameters of the smart power distribution network comprises the specific methods and steps of (1) detecting a network topology change of the power distribution network; (2) analyzing protection equipment affected by the network topology change; (3) forming a differential protection network topology parameter configuration file; (4) quitting a differential protection function of the corresponding protection equipment; (5) issuing a network topology parameter configuration file; (6) inputting the differential protection function of the corresponding protection equipment; and (7) forming a network topology parameter configuration file updating log. The adaptive method of the network topology has the beneficial effects that (1) the characteristics of a distributed power supply can be fully described and various applications comprising the distributed power supply are supported; and (2) the influence on an existing power distribution automation system is the smallest and maturely used application software in an existing medium-voltage power distribution network does not need to be modified.