146results about How to "Reduce power outage loss" patented technology

The invention discloses a breakdown intelligent classification and positioning method of an electric transmission line. The technical scheme of the breakdown intelligent classification and positioning method of the electric transmission line breakdown is that the advantages of three kinds of technologies of a support vector machine (SVM), self-adaptation nerve fuzzy inferences (SVM) and radial based function (RBF) neural networks are concentrated. The breakdown classifiers and positioners of the SVM, the SVM and the RBF neural networks are designed. Positioning errors, classification accuracy and model operation time are used as evaluation indicators. According to the standard that accuracy is preferred and efficiency is taken into account, intelligent selection of an optimal classifier and an optimal positioner is achieved under different breakdown conditions, and optimal breakdown classification and positioning effect is achieved. Meanwhile breakdown serious extent and repair indicators are designed to evaluate breakdown injury extent and breakdown repair difficulty. The breakdown intelligent classification and positioning method of the electric transmission line effectively improves power supply reliability, reduces outage cost, and meanwhile greatly reduces workload of maintenance personnel and improves working efficiency.

The invention relates to an electric secondary AC circuit detection method which comprises the following steps: before a power plant machine set is started, a low-voltage short-circuit point or a short-circuit bogie is input; three-phase 380 V voltage is added at the high-voltage side of a booster station to form a circuit by means of the impedance of a transformer and a generator; current amplitude and phase are measured through a current detecting apparatus to check polarity and transformation ratio in advance; all current protective directions such as generator differential motion are measured. When a neutral point is not connected, a short-circuit point is made at a high plant transformer low-voltage side, and the three-phase 380 V voltage is added at the neutral point of the generator, thereby realizing overall checkup of a generator AC circuit; then, the three-phase 380 V voltage is converted into one-phase voltage or two-phase voltage to carry out overall checkup of a zero sequence circuit. The detection method can check all CT and PT circuits of a generation-transformer group before power transmission; moreover, all protection directions of the generation-transformer group are checked in advance, thereby saving time and fuel oil along with economical efficiency, environmental protection and safety. The electric secondary AC circuit detection method can check secondary circuits such as the transformer and the bus differential protection of a transformer substation.

The invention provides a combined traveling wave fault location method of a high-voltage overhead line and cable hybrid line. The method comprises the following steps of: firstly, carrying out fault section selection by using a double-ended principle according to time difference generated when a fault initial traveling wave of the hybrid line arrives at two ends, then carrying out initial fault location by using a single-ended principle, and finally working out an accurate result via the single-ended principle by combining with the time difference generated when the fault initial traveling wave arrives at two sides of the line. The method has the advantages that: the obtained fault location result is the result of the single-ended fault location principle, and the effects of hybrid line length error and accurate time synchronization problem of two sides of the line to the fault location accuracy are eliminated in the fault location by using the double-ended principle so that the accuracy and reliability of the fault location are improved. Therefore, the traveling wave fault location of the high-voltage overhead line and cable hybrid line is realized by using the method, the problem on how to accurately search a fault point position after the hybrid line is in the fault can be reliably solved and the traveling wave fault location method has a good application prospect.

A method and apparatus for locating and isoalting the failure in distributing circuit is disclosed. Said apparatus is used in conjunction with vacuum switch, power supply, and failure segment indicator to form a core unit of an automatic distributing network system. The said method can quickly locate and automatically isolate the failure region for increasing reliability of power supply by distribution system.

The invention discloses an on-line detection method of a metal oxide arrester insulating property influencing factor. The on-line detection method comprises the following steps of: firstly obtaining total current i x (t) of leakage current from a metal oxide arrester ground downlead, and separating resistive current i r (t) from the total current; calculating a total current amplitude value I x, a resistive current amplitude value I r, fundamental current amplitude value I r 1 in the resistive current and a triple-frequency harmonics electric current amplitude value I r3 in the resistive current; and further calculating an aging coefficient beta of a metal oxide arrester, if the I x is greater than a setting value or the I r is greater than the setting value, judging the insulating property of the metal oxide arrester to be poor, and then forming criteria according to the I r, the I r 1, the I r 3 and beta. The method can exactly distinguish the influencing factor which causes the insulating property of the metal oxide arrester to get poor, is beneficial to shortening power off overhaul time, prolongs the service life of metal oxide, and has very important meanings of reducing power off loss and guaranteeing an electric system to safely and economically operate.

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 zero sequence parameter live measurement device for the mutual induction lines, which comprises a GPS antenna and receiver, a signal input wiring terminal, a signal transmitter, a DSP synchronous data acquisition card, a dead contact card, a relay and a PC card. The invention not only can measure the mutual inductance between lines, but also can measure the mutual resistance between the lines; moreover, the device enables the measurement of the zero sequence parameter of mutual induction lines not only to be accomplished in a stable state process, but also to be accomplished in a transient state process. The invention has the vital significance to the secure operation of an electric power system, thus having extremely widespread promotion and application value.

The invention discloses an emergency repair command platform for a distribution network. The emergency repair command platform is composed of a command center business system, a monitoring and management platform, power mobile repair, a repair resource monitoring and dispatching system, a GPS device information maintenance main interface, and an interface_emergency repair command platform system. The emergency repair command platform has the functions of improving the management level of the fault repair, through the idea of "technological innovation plus management innovation", centralizing enterprise advantageous resources, setting up an emergency service center of the distribution network, accepting power failure repair businesses in a unified manner, realizing the intelligentized command of the power failure, mobile repair and active customer service, and improving the overall management level of fault repair and repair efficiency, so as to achieve the production goals of reducing the outage cost of users, reducing the energy-selling loss of power grid enterprises, and improving the power supply reliability of the power grid.

The invention provides anticorrosive paint for inner and outer wall decoration of a power station transformer, which comprises main paint and a curing agent. The anticorrosive paint is characterized in that the main paint and the curing agent of outer wall paint are prepared according to the proportion of 5:1, the main paint and the curing agent of inner wall paint are prepared according to the proportion of 8:1, and the curing agent is IPDI tripolymer-modified HDI biuret. The inner wall paint of the power station transformer has excellent oil resistance, and a paint film can still show good protection property and electrical insulating property when being soaked in transformer oil with a temperature of between 90 and 110 DEG C for a long time. The outer wall paint of the power station transformer has excellent weather resistance, can effectively improve the protection property, and can prolong the service life of equipment, reduce maintenance cost and power cut loss, and improve power transmission efficiency.

A method use line-frequency disturb the zero-sequence impedance parameter of resource charge measure mutual inductance circuit, cuts the power of a certain circuit in the mutual inductance circuit in order, puts one three-phase of the power cut circuit to earth, measures the induction voltage of the other one after it is in short-circuit; at the same time measures the zero-sequence voltage pressure loss and zero-sequence current in the other run circuit; uses the GPS technology sample the zero-sequence voltage, zero-sequence current in the mutual inductance circuit in-phase, gets the zero-sequence voltage, zero-sequence current data in the mutual inductance circuit; collects the data of each measurement point to the center computer; gets the zero-sequence impedance parameter of the mutual inductance circuit by using the least square law solute the algebraic equations, differential equations or integral equations; this equipment is composed of GPS antenna, signal input connection interface, signal transducer, embedded DPS synchromesh data collection card, launch amount card, relay group, embed PC card, the electrical source card.

The invention a power line failure positioning device applied in light current grounding system, its character: it is composed of voltage sensor, current sensor, signal cable and signal box, there are power supply circuit, failure identification circuit and signal indicating circuit connected with one another, three single-core high voltage cable passes through the center of the current sensor, the secondary-side winding of the voltage sensor is connected to the power supply circuit and the failure identification circuit by the signal cable and that of the current sensor is directly connected to the failure identification by the signal cable. It can accurately not only justify the path of the short-circuit failure current but also the path of single-phase grounding failure current, thus settling the problem of positioning various failure line segments and branch lines.

This invention relates to one electrification measurement method of induce zero parameter, which comprises the following steps: a, getting each line zero order current and zero sequence voltage; using GPS to realize the simultaneous sampling of multi-end voltages and current signals; using modulator or Ethernet to assemble each measurement spots into center computer; then using OLS method to get induce circuit zero sequence parameters through differential equation set including resistance and parameters. The device comprises GPS antenna and receiver; signal inputting terminal, signal transducer, DSP simultaneous data collection card, quantity card, relay and PC card.

The invention discloses a power distribution network toughness three-stage evaluation method in typhoon weather, a storage medium and equipment, and the method comprises: simulating and analyzing theimpact on a power distribution network from a typhoon disaster and the response process of the power distribution network to the typhoon disaster when the typhoon disaster does not happen, and carrying out the statistical calculation of a pre-disaster toughness index of the power distribution network; in the typhoon disaster occurrence process, according to the real-time data returned by the powerdistribution network data acquisition and monitoring control system, calculating the toughness index in the power distribution network disaster; after typhoon departure, acquiring actual data of emergency response and first-aid repair of the power distribution network, and calculating a post-disaster toughness index of the power distribution network; and quantifying the three-stage toughness level of the power distribution network, and quantifying the pre-disaster strength degree, the in-disaster resistance, the post-disaster recovery efficiency and the comprehensive toughness of the power distribution network for dealing with typhoon disasters. The method can be used for guiding power distribution network element reinforcement when typhoon does not occur, emergency control in the typhoondisaster process and power restoration after typhoon disasters, and provides a quantitative basis for system planning, operation scheduling and decision recovery.

The invention provides a power distribution network time-of-use power price optimizing method taking reliability into consideration. The power distribution network time-of-use power price optimizing method is a time-of-use power price forming method which takes user reliability, power supply company benefit and user cost into consideration at the same time. On the basis of user need elasticity, the time-of-use power price optimizing method combining reliability compensation of users is provided, a stable particle swarm optimizing algorithm is adopted for optimized solving, and the time-of-use power price forming method is used for forming of time-of-use power price of a power distribution network. The power distribution network time-of-use power price optimizing method can be adjusted according to different regions and different user types, thereby having high adaptability.

The invention provides automatic bus transfer equipment and method applicable to double-bus connection. The automatic bus transfer equipment at least comprises two power supply circuits that are standby to each other; a power supply circuit I is connected with a bus I and a bus II separately at least through a first circuit breaker; a power supply circuit II is connected with the bus I and the bus II separately at least through a second circuit breaker; and the equipment further comprises a current voltage return circuit, an input circuit and an output circuit. The automatic bus transfer equipment is applicable to the 110kv transformer substation with double-bus connection; and the standby power supply can be rapidly put into operation through the automatic bus transfer equipment, so that the outage time of the transformer substation can be reduced, and the outage cost is lowered.

The invention relates to the field of power system automation, in particular to a power distribution network data checking method based on the international electrotechnical commission (IEC) 61968 standard. The method is characterized in that a system used by the method comprises a grammar checking module, a semantics checking module and a log module which are sequentially communicated. The method includes the following steps: (1) configuring a checking machine for original data to enable the original data to be applicable to the common information model (CIM) standard used by CIM data; (2) judging whether grammatical mistakes exist in the CIM and writing the grammatical mistakes into the log module; (3) loading in the CIM standard used by the CIM data according to the configured checking machine; (4) judging whether semantics mistakes exist in the CIM model and writing the semantics mistakes into the log module; and (5) outputting an analysis result and a journal. The method improves power distribution network data quality, improves automatic operation level of a power distribution network accordingly, reduces outage cost, and has great social and economical value for safe operation of the power distribution network.

The invention provides a pre-disaster first-aid repair personnel pre-deployment method for improving the power grid recovery speed, which comprises the following steps: 1) after predicting an imminentdisaster, obtaining the fault probability of each element according to a power grid element vulnerability curve in combination with meteorological prediction and the geographic information of a powergrid, and generating a fault scene under the disaster through sequential Monte Carlo simulation; 2) acquiring information of a power grid, a repair team and deployable positions, establishing a two-stage stochastic programming model, formulating a deployment scheme of first-aid repair personnel in the first stage, and performing repair and recovery collaborative optimization according to a faultscene in the second stage to minimize power failure loss; and 3) carrying out decoupling solution on the two-stage stochastic programming model through a Progressive Hedging (PH) algorithm. Accordingto the invention, before the upcoming meteorological disasters are predicted, emergency maintenance personnel are deployed in the key links of the power grid, so that the emergency response capabilityof the power grid after the disasters is improved, the repair of fault elements is accelerated, and reasonable suggestions are provided for the formulation of power grid emergency plans.

The invention discloses a mountain fire disaster early-warning method for an overhead power transmission line. The method comprises the steps of A, acquiring and obtaining mountain fire occurrence information by utilizing a monitoring module, wherein the mountain fire occurrence information comprises combustible material characteristics, a terrain factor and a meteorological factor; B, obtaining a mountain fire influence factor in the mountain fire occurrence information, and establishing a relationship through a random forest model for threshold association between a mountain fire and the mountain fire influence factor of the mountain fire; C, performing time-space process modeling of mountain fire spread through a cellular automaton with the capability of simulating a complicated natural disaster time-space evolution process, and determining a cellular conversion rule of the cellular automaton by adopting the random forest model; and D, predicting a mountain fire spread process through a cellular automaton model, estimating time of the mountain fire spread to the overhead line, and assessing the risk of overhead line shutdown in combination with external disaster information and power grid internal characteristics. The method can assist in more effectively handling power system interlocking faults caused by a natural disaster prediction effect, so that economic and personnel loss of a power grid and power utilization units is reduced.

The invention discloses a power distribution automation terminal-oriented topology generation method. The method comprises the following steps of S1, obtaining basic data: obtaining attribute data of each device in a power distribution network, a geographic map and a schematic diagram of a power grid, represented by vector structures, and various image device data represented by lattice structures from a GIS of the power distribution network by a power distribution automation system master station; S2, analyzing the basic data: analyzing the attribute data of each device by the power distribution automation system master station, distributing and connecting devices through the geographic map and the schematic diagram of the power grid, represented by the vector structures, obtaining a physical connection condition of each device in the power distribution network, obtaining various switch blades in the power distribution network, and finally summarizing and sending the analyzed data to the power distribution automation system master station; and S3, generating a dynamic topology: establishing a topology model for the summarized data by the power distribution automation system master station. The method is simple and convenient to realize, and effectively improves the management efficiency, thereby being suitable for popularization.

The invention discloses an active power distribution network fault load transfer method based on the intelligent particle swarm optimization algorithm. The method comprises steps that firstly, distributed generations (Distributed generations) are processed, operation modes of DG after faults are specified, the island division principle is further determined, DG island division after the faults isperformed, and an island operation range is made; and lastly, topological constraints, node voltage constraints, DG output constraints and branch capacity constraints are considered, the maximum transfer load and the minimum frequency of switching operations are taken as the optimal, and the active distribution network load transfer method based on MAPSO is proposed. The method is advantaged in that through simulation and system analysis, rapid transfer of the load in the fault area of the active distribution network can be realized quickly and effectively, and thereby power loss caused by malfunction or maintenance is reduced.

The invention belongs to the fields of power secondary system abnormal state recognition and misoperation prevention and particularly relates to an error prevention system and method for secondary system anomaly recognition of a substation under multiple associated scenes. According to the method, based on normalization of substation information description and normalization of an operation process, an integrated error-prevention function and an error prevention strategy are deployed and configured in devices at all levels of a secondary system comprising devices, a station server and a scheduling server, and information modeling and recognition are performed on the running states of the secondary devices and the secondary system in the substation; and meanwhile, before primary operation and secondary operation on the substation, whether the operation can cause a system anomaly or misoperation is judged through rehearsal according to a power grid topological structure and the running setting state of the secondary devices, and if the system anomaly or the misoperation is caused, warning or forbidding or prompting is actively sent out through analysis, error prevention and remedy are performed on the misoperation or the abnormal running state occurring in the system, and therefore forward intervention on field operation and maintenance work is realized.

The invention discloses a peak-valley time-of-use power price determining method taking both system reliability and power purchase risk into consideration. The peak-valley time-of-use power price determining method mainly includes firstly establishing a power price fluctuation matrix under peak-valley time-of-use power price; then establishing a power grid running enterprise profit model taking both line loss cost and power purpose risk into consideration; setting up a functional relation of system reliability changing as load; finally establishing a peak-valley time-of-use power price optimizing model taking both system reliability and power purchase risk into consideration. Via time-of-use power price adjustment, users are motivated to actively participate in power price response, so that without extra investment of a power grid running enterprise, power supply reliability of the power grid is improved, and power failure loss is reduced. Meanwhile, profits of the power grid running enterprise are increased, power purchase risk is reduced, and a win-win situation is created for the users and the power grid running enterprise.

The invention discloses a DC line fault protection method based on a current converter injection characteristic signal. The method comprises the following steps: step 1: establishing a full-bridge modular multilevel current converter; step 2: when a DC line fault occurs, starting a characteristic signal injection strategy to inject the characteristic signal after a fault clearing strategy is started for a certain time, wherein the characteristic signal injection strategy can generate an identifiable characteristic signal in the line; and step 3, after the characteristic signal injection strategy is started, judging whether the fault exists through wavefront refraction. By adoption of the DC line fault protection method disclosed by the invention, permanent faults and transient faults can be quickly distinguished, when the fault is determined as the permanent fault, the fault distance can be accurately judged, and a function of fast restart of a fast arc-extinguishing fault and the non-start of the permanent fault is achieved; and by adoption of the DC line fault protection method disclosed by the invention, adaptive restart is achieved on a DC overhead line, adaptive identificationof the fault nature and the fast restart of the fast arc-extinguishing fault are achieved, the safe and reliable operation of a DC system is ensured, the power outage loss is reduced, and the directbenefit and the indirect benefit are very significant.

The zero-sequence impedance parameter measure method of the T type electric transmission line, the method lets the load current provide the zero-sequence current for measurement by cutting the single-phase switch in a certain branch of T type electric transmission line to make run without phase, then resumes the normal run in 0.5 second to 1 second. Uses the GPS technology realize the multi-terminal zero-sequence voltage, zero-sequence current synchromesh collection of T type electric transmission line; collects the data of each measurement point to the center computer by using the modem or Ethernet network; gets the zero-sequence impedance parameter of the mutual inductance circuit by using the least square law solute the algebraic equations, differential equations or integral equations; this equipment is composed of GPS antenna and OEM board, signal input connection interface, signal transducer, embedded DPS synchromesh data collection card, launch amount card, relay group, relay group input interface, embed PC card, the electrical source card, electrical source signal bus motherboard.

The invention provides a power equipment defect management system based on AHP and remote support. The system comprises an onsite data collection system, an integrated data management platform and a fault defect analysis and diagnosis system, and the onsite data collection system is used for collecting onsite operation information, and transmitting the onsite operation information to the integrated data management platform; the integrated data management platform is used for realizing storage and management of comprehensive data, performing analysis and hierarchical evaluation on equipment index data and confirming data credibility, and the comprehensive data comprises substation equipment basic parameters, operation information, historical defect data, historical diagnosis cases, expert information, periodical articles and a standard database; and the fault defect analysis and diagnosis system performs real-time data interaction with the integrated data management platform and is usedfor realizing user remote real-time communication, data query and fault analysis and diagnosis. Expert resources can be fully utilized, the equipment fault defect diagnosis efficiency and accuracy are effectively improved, and the system is of great significance in guaranteeing safe and stable operation of power grid equipment.

The invention discloses a memetic algorithm-based method for researching optimal configuration of switches of power distribution networks. The method comprises the following steps of comprehensively considering the balance of economy and reliability by taking a minimum power supply zone as a basic analysis unit, calculating the differences between a manual switch and a remote control switch, and establishing a mathematic model for optimizing a section switch and an interconnection switch at the same time on the basis of a cost-benefit theory; importing a memetic algorithm, and combining an intelligent algorithm and a local search strategy to optimize the mounting quantity and positions of the section switch and the interconnection switch; and carrying out analysis by applying an IEEE RBTS-BUS 2 system, and the results show that load capacities at two ends of the switches need to be basically balanced and then the effectiveness of the method is verified.

The invention provides a multi-channel remote signal test device for a ring network cabinet and a test method thereof, and relates to the technical field of remote control signal test. The multi-channel remote signal test device for the ring network cabinet comprises an analog switch module A, an analog switch module 101, an analog switch module 102 and an analog switch module B. The multi-channel remote signal test method for the ring network cabinet comprises the steps of firstly, accessing a tester to the remote control loop of a ring network cabinet DTU; secondly, testing an initial state; thirdly, testing the state; fourthly, capturing and self-maintaining multi-channel remote signals; fifthly, recording a test result and checking the result. According to the invention, the device realizes the multi-channel test and four intervals can be continuously operated. Repeated confirming links are eliminated. Meanwhile, when one part inside the ring network cabinet or the switching-on outlet of the ring network cabinet is in wrong connection, the wrong connection can be directly reflected by the device. Therefore, the field test personnel can check and repair the wrong connection conveniently. Meanwhile, the wiring number is reduced through the standardized primary wiring operation by the device, so that the influence of human factors is reduced to the lowest.

The invention provides a power distribution network distributed intelligent control method based on a regional agent mode. The method includes the steps of key management (KDC), STU fault detection, starting of fault positioning, isolation of faults, and fault recovery. The power distribution network distributed intelligent control method utilizes a regional agent mode to complete distributed FA, realizes management in a local area network, and realizes a complicated power supply recovery strategy.

The invention discloses an intelligent interaction platform for power fault rush repair. The intelligent interaction platform comprises a command server-side device and a plurality of client-side devices in remote connection with the command server-side device. By means of information interaction between the command server-side device and the client-side devices, information interaction between a command center and stagnation point rush-repair workers is achieved in the power fault rush-repair process, therefore, the rush repair efficiency is improved, and the comprehensive cost for fault rush repair is lowered.

The invention discloses a power distribution network island dividing method based on minimum user power failure loss, and the method comprises the following steps: 10), building a power failure region power distribution network simplifying model after a fault; 20), determining the unit power failure loss functions for different types of users according to the actual conditions of a power failure region; 30), determining the output condition of a distributed power supply at a moment of power failure and estimated power failure time; 40), building an island dividing model which takes the reduction of the power failure loss as the target; 50), searching a feasible region, solving the island dividing model, obtaining an island dividing method, and carrying out the island dividing according to the island dividing method. The method reduces the power failure loss for users within various operation constraints of the power distribution network.