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36results about How to "Achieving power restoration" patented technology

Automatic rapid protection control method of novel feeder

The invention particularly discloses an automatic rapid protection control method of a novel feeder. The automatic rapid protection control method comprises the following steps of: 1, mounting an STU (smart terminal unit) on each circuit switch and each interconnection switch in a network distribution structure, configuring a protective element into each STU, connecting the adjacent STUs, forming an annular network, and finally, connecting the annular network to an automatic main station of the feeder; 2, configuring each element in network distribution; 3, rapidly identifying a fault by the STUs according to local and adjacent current information and switch position information; 4, transmitting the fault identifying result to the adjacent STUs and the automatic main station of the feeder through a communication network by the STUs, and 5, carrying out isolation and power supply restoration on the fault. The automatic rapid protection control method has the beneficial effects that: an FTU (feeder terminal unit) in an original feeder is upgraded into the STU with intelligent judgment ability; and the fault section can be rapidly located by the local and adjacent current information and switch position information, so that isolation of a fault area and the power supply restoration of a non-fault area are achieved.
Owner:SHANDONG UNIV

Distribution network protection method taking randomness of photovoltaic power station into consideration

A distribution network protection method taking the randomness of a photovoltaic power station into consideration mainly solves the problems that conventional distribution network protection equipment is seriously affected in protection range, selectivity, sensitivity and reliability after being accessed into a distributed power supply. The method comprises the following steps: dividing the distribution network into areas, and real-timely monitoring the current output by each area; building a dynamic Thevenin equivalent parameter model of the distributed power supply; detecting faults of the distribution network; positioning and separating the fault area; and reclosing to resume power supply. The method is not affected by the access number, capacity and positions of the distributed power supplies, such as the photovoltaic power station, can realize fault detection, fault area positioning and separating, reclosing and power supply resuming quickly and reliably, is not only suitable for the requirement of large-capacity DG injection in the future and can reliably work when large-capacity DG is injected, but also suitable for the distributed power supply with large output random variation, and has the characteristic of shorter time in cutting off instant faults.
Owner:STATE GRID SHANDONG ELECTRIC POWER +1

Cascaded flexible alternating-current link converter topological structure

The invention discloses a cascaded flexible AC (alternating-current) link converter topological structure which comprises a three-phase AC power supply, three power regulation units, three Buck type direct AC-AC converters UT-AC, a three-phase multi-winding isolation transformer and three LC low-pass filters, wherein each power regulation unit is formed by two bipolar direct type AC-AC convertersBT-AC. According to the topological structure of the invention, the power flow between interconnected feeder lines can be controlled, the power restoration of an isolated load can be realized under the condition of a flexible interconnection fault of feeder lines in a power distribution network, the permeability of distributed power generation in a power distribution network can be improved through the flexible interconnection of the feeder lines in the power distribution network, and the electric energy quality and the power supply reliability of the power distribution network are improved.
Owner:NORTHEAST DIANLI UNIVERSITY

Automatic processing method and processing system for single-phase grounding faults

ActiveCN110190591AThe characteristics of electrical quantity are obviousImprove accuracyElectrical testingEmergency protection detectionAutomatic processingSingle phase
The invention discloses an automatic processing method and processing system for single-phase grounding faults. A faulty phase grounding arc extinguishing device is arranged on the bus of a power station, and terminals integrated with a faulty phase grounding incremental principle and a faulty phase grounding disconnection incremental principle are arranged along a distribution line. When single-phase grounding occurs in the distribution line, the terminals use the disturbance information caused by the action process of the faulty phase grounding arc extinguishing device to realize the sectional positioning alarm of instantaneous single-phase grounding faults and the local tripping isolation of permanent single-phase grounding faults. Furthermore, by combining the function of delayed closing after voltage loss on the configuration side of an interconnection switch with the delay of the protection action of the faulty phase grounding disconnection incremental principle in the terminalsalong the distribution line, the power supply in a sound section in the downstream of a permanent single-phase grounding fault section is restored by adopting two sets of fixed values according to different power flow directions.
Owner:STATE GRID SHAANXI ELECTRIC POWER RES INST +2

GSM module test system and method

Disclosed is a GSM module testing system installed in a computer, the computer is connected with a power supply and a GSM module, and the system comprises: a parameter setting module for setting testing parameters; a power supply control device for controlling the on and off of the power supply and controlling the output voltage of the power supply to the GSM module according to the stated testing parameters as well as controlling the power supply to carry out the simulated power cut and restoring the outputting of voltage to the GSM module after the simulated power cut is finished; a command sending module for sending a command to the GSM module to make the GSM module execute the command to become operational and try to connect to a network and acquire the corresponding execution result; and a judging module for judging whether the GSM module can restore electricity and connect to the network after the simulated power cut so as to make sure whether the GSM module is normal or not according to the execution result. The invention also provides a GSM module test method. The testing system and the method can test the quality of the GSM module through the conditions of electricity restoration of the GSM module in the simulated power cut test and connection with network.
Owner:SHENZHEN FUTAIHONG PRECISION IND CO LTD +1

Power distribution network distributed intelligent control method based on regional agent mode

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.
Owner:JIANGSU ELECTRIC POWER CO +1

Small current grounding fault processing method with line selection device and protection recloser cooperated

The invention provides a small current grounding fault processing method with a line selection device and a protection recloser cooperated and belongs to the field of power system relay protection. The method is characterized by including the following steps that a, fault lines are judged; b, a tripping instruction is sent in a delayed mode; c, whether faults exist or not is judged, the step d is executed if the faults exist, and the step f is executed if the faults disappear; d-e, the fault lines are reclosed; f, whether the faults reappear or not is judged, the step g is executed if the faults do not reappear, and the step h is executed if the faults reappear; g, the fault lines are restored to normal power supply; h, the tripping instruction and a recloser locking instruction are sent. By means of the small current grounding fault processing method with the line selection device and the protection recloser cooperated, fault lines which are wrongly judged and can be self-cured through tripping arc blowout are subjected to power supply again after being tripped and the fault lines with faults incapable of disappearing by themselves are isolated through the line selection device, so that power supply reliability is greatly improved.
Owner:SHANDONG KEHUI POWER AUTOMATION

Line selection device and protection non-fault-trip prevention cooperation small current grounding fault processing method

The invention discloses a line selection device and protection non-fault-trip prevention cooperation small current grounding fault processing method, and belongs to a power system relay protection field. The line selection device and protection non-fault-trip prevention cooperation small current grounding fault processing method comprises steps that step 1001, the line selection device is used to determine a faulted line; a step 1002, the line selection device is used to control the trip-out of the faulted line; step 1003, the non-fault-trip prevention closing is executed; step 1004, the line selection device is used to determine whether the fault after the trip-out disappears; step 1005, the determining of the faulted line is wrong; step 1006, the determining of the faulted line is right; step 1007, whether the fault occurs again is determined; step 1008, the faulted line is restored; step 1009, a trip-out and non-fault-trip prevention locking instruction is transmitted; step 1010, the faulted line is isolated. The line selection device and protection non-fault-trip prevention cooperation small current grounding fault processing method is advantageous in that after the faulted line is determined by the line selection device, a trip-out operation circuit is directly controlled, and by adopting the cooperation between a trip-out control circuit and the non-fault-trip function of the protection device, the isolation of the small current grounding fault is realized.
Owner:SHANDONG KEHUI POWER AUTOMATION

Method and equipment for recovering power supply of non-fault section at downstream of grounding fault

The invention discloses a method and equipment for recovering power supply of a non-fault section at the downstream of a grounding fault. The method comprises the following steps of: configuring equipment; when a grounding fault occurs in a main line of a power distribution network, detecting the grounding fault through section switches, and judging a transient power direction while starting protection delay timing; driving the first section switch at the upstream of the fault point to delay T1 and then tripping, and delaying T2 and then reclosing; after the first section switch is coincided,if the fault disappears, directly recovering the power supply of a downstream non-fault section, otherwise, accelerating tripping to isolate the fault point; when each section switch at the downstreamof the grounding fault point loses power and then is powered on, accelerating tripping after a grounding fault is detected; when an interconnection switch detects single-side voltage loss, delaying T3, and turning on the interconnection switch; making each section switch sequentially delay T4 from the interconnection switch to the fault point direction so as to be switched on; and after the nearest section switch at the downstream of the fault point is switched on to the grounding fault, accelerating tripping, so that the fault point is isolated, and the downstream non-fault section recoverspower supply.
Owner:国网山东省电力公司营销服务中心(计量中心) +3

Variable altitude diesel engine power recovery method based on two-stage supercharging energy difference

The invention discloses a variable altitude diesel engine power recovery method based on two-stage supercharging energy differentiation in the technical field of internal combustion engines. The method comprises the following steps: the limit power recovery altitude of a diesel engine is predicated, and estimating is carried out to obtain the variable altitude air inlet demand and the total energy demand of the diesel engine; through operation point calculation and turbine matching of all stages of gas compressors, a reference matching scheme of high-pressure and low-pressure gas compressors is obtained, and an optimized matching scheme of high-pressure and low-pressure turbines is obtained; by matching the flow area of the high-pressure stage turbine, the total supercharging energy requirements under different altitude working conditions are met; a power recovery economical path is determined according to the throttling characteristic of series connection of the two stages of turbines; and the inter-stage energy distribution optimization under different altitude working conditions is realized by matching the flow area of the low-pressure stage turbine. Through differential distribution of two-stage supercharging energy, the total energy demand problem is solved through high-pressure-stage matching, the energy distribution problem is solved through high-pressure-stage and low-pressure-stage area ratio matching, and diesel engine power recovery under variable altitudes can be achieved.
Owner:SHANGHAI JIAO TONG UNIV

Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line

The present invention discloses a apparatus and method for automatic isolation of fault section of short circuit fault of power distribution network overhead network and single-phase earth fault, and power supply automatic recovery of non-fault section, which is suitable for power distribution network electric network overhead network of 3-10kV. The principle of automatic isolation and power supply automatic recovery is as following: mount a plurality of voltage type recloser on the overhead network to separate the network into a plurality of sections; when fault occurs, a relay protection device or a line selection device transmits signal to automatically break off or close a faulty line outlet breaker according to preset delay time and action sequence, and then coordinate with the network recloser; determine fault section through one time reclosing; isolate fault section through secondary reclosing and then recover power supply in non-fault section. At the same time, a detection terminal installation mounted on a substation can automatically judge section where the fault in, and transmit the fault message to a scheduling background while transmitting to designated customers in short message way. The present invention is provided with mature technology and high reliability.
Owner:BEIJING SHENGHUAHONGYE TECH

Fault processing method and system for overhead-cable hybrid line

PendingCN110098599ADistinguish between permanent faultsDistinguish between transient faultsArrangements responsive to excess currentInformation technology support systemTransformerFault handling
The invention provides a fault processing method and system for an overhead-cable hybrid line. According to the invention, when there is a fault in the overhead line-cable hybrid line with preset safety protection configuration, a strategy corresponding to the short-circuit current resistance of the faulty line is selected from pre-constructed fault processing strategies in allusion to the short-circuit current resistance of the overhead-cable hybrid line, wherein the safety protection configuration and fault processing strategies are configured based on the short-circuit current resistance ofa cable line and a main transformer. The method and system take into account of the difference of short-circuit current resistance of the main transformer and the cable line in a distribution network, carry out different safety protection configurations, effectively distinguish permanent faults and instantaneous faults by reasonably utilizing the advantages of distributed processing and centralized intelligent processing through the cooperation of relay protection and reclosing, and quickly realize the minimum range of fault isolation and the maximum range of power supply recovery.
Owner:CHINA ELECTRIC POWER RES INST +2

Standby automatic switching and healing device for multi-end power supply line

The invention relates to a standby automatic switching and healing device for a multi-end power supply line. The standby automatic switching and healing device for the multi-end power supply line comprises an OPEN-3000 power grid dispatching automation integration system; the OPEN-3000 power grid dispatching automation integration system is connected with a standby automatic switching and healing judgment and treatment system, the standby automatic switching and healing judgment and treatment system comprises a running signal monitoring acquisition module used for acquiring running signals of the power grid running state and a fault signal acquisition module used for acquiring fault signals when a power grid has faults, and the running signal monitoring acquisition module and the fault signal acquisition module are both connected with a central processing unit; the central processing unit is connected with a logical judgment module used for performing logical judgment on the faults and a strategy control module used for outputting control strategy according to the fault types, and the central processing unit is connected with a strategy execution module. The standby automatic switching and healing device for the multi-end power supply line is compact in structure, convenient to operate, high in automation degree, wide in adaptive range, safe and reliable, and capable of automatically achieving the power restoration to the standby automatic switching and healing device for the multi-end power supply line.
Owner:STATE GRID CORP OF CHINA +2

Fault processing method and system for feeder automation line with distributed power supply access

The invention discloses a fault processing method and system for a feeder automation line with distributed power supply access. The method comprises the steps: monitoring line information in real time, and removing a line fault; carrying out fault positioning and fault isolation on the fault; and judging the grid connection condition of the distributed power supply according to the fault point position and the operation mode. According to the voltage-time type feeder automation provided by the embodiment of the invention, related control logic is formulated by identifying voltage signal characteristics of a distribution line, opening, closing and locking of the section switch in a specific scene are controlled, and local isolation of a distribution network fault and power restoration of anon-fault area are realized.
Owner:ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD

Microprocessor-based power source connection device adopting infrared remote control signal decoding mode

The invention relates to a microprocessor-based power source connection device adopting an infrared remote control signal decoding mode. The power source connection device comprises an external power interface, a main board and an output interface, the main board comprises a microprocessor, an infrared receiving module, a direct-current voltage stabilizing power module, a two-way relay driving module and a current detection module. The power source connection device acquires current signals of the output interface, and automatic power off is realized to protect load components when a load current is overhigh; when the load current is a standby current, power is automatically cut off to realize a function of power saving. By the infrared remote control signal decoding mode, decoding of any keys of any infrared remote controls can be realized without infrared signal match learning, and power restoration of the power source connection device is realized. In addition, functions of electric shock prevention and automatic power off can be realized, operations in power restoration are pretty convenient, and functions of master control and control acceptance can be realized.
Owner:高域智能卫浴科技(江苏)有限公司

Local feeder line fault isolation method and system based on permanent fault identification

ActiveCN108923392AFast restoration of powerPrevent short-circuit current impactEmergency protective circuit arrangementsCommunications systemPrimary station
The invention relates to a local feeder line fault isolation method and system based on permanent fault identification. The method comprises the following steps of firstly, when a distribution line suffers from a fault, each section switch on the distribution line is tripped; and then permanent fault judgment is carried out on each section switch, and if any one section switch is judged to be in anon-permanent fault, the section switch is switched on after delay, and if the section switch is judged to be in a permanent fault, the section switch is not switched on. Therefore, the method only carries out a one-time of "stripping-switching on" process, and has the advantage of being small in switching action frequency, closing of the switch on a permanent fault can be avoided, and the systemhas the advantage of being small in impact on a distribution network system. Moreover, the method does not depend on a communication system, and does not need to be matched with a main station, so that the method is simple and reliable in process. In addition, the section switches do not need to be matched stage by stage, and the recovery power supply time of the fault isolation and non-fault sections is short, so that the recovery power supply speed of the fault isolation and non-fault sections is further accelerated.
Owner:XUCHANG XJ SOFTWARE TECH +2

An embedded socket with a controlled power supply interface and a usb interface based on a microprocessor-based infrared remote control signal decoding method

The invention relates to a microprocessor-based embedded socket with a controlled power interface and a USB (universal serial bus) interface and adopting an infrared remote control signal decoding mode. The embedded socket comprises an external power interface, a main board and an output interface, the main board comprises a microprocessor, an infrared receiving module, a direct-current voltage stabilizing power module, a two-way relay driving module and a current detection module. The embedded socket acquires current signals of the output interface, and automatic power off is realized to protect load components when a load current is overhigh; when the load current is a standby current, power is automatically cut off to realize a function of power saving. By the infrared remote control signal decoding mode, decoding of any keys of any infrared remote controls can be realized without infrared signal match learning, and power restoration of the embedded socket is realized. In addition, functions of electric shock prevention and automatic power off can be realized, operations in power restoration are pretty convenient, and functions of master control and control acceptance can be realized.
Owner:高域智能卫浴科技(江苏)有限公司

Handling method of small current grounding fault with line selection device and protection reclosing switch

The invention provides a small current grounding fault processing method with a line selection device and a protection recloser cooperated and belongs to the field of power system relay protection. The method is characterized by including the following steps that a, fault lines are judged; b, a tripping instruction is sent in a delayed mode; c, whether faults exist or not is judged, the step d is executed if the faults exist, and the step f is executed if the faults disappear; d-e, the fault lines are reclosed; f, whether the faults reappear or not is judged, the step g is executed if the faults do not reappear, and the step h is executed if the faults reappear; g, the fault lines are restored to normal power supply; h, the tripping instruction and a recloser locking instruction are sent. By means of the small current grounding fault processing method with the line selection device and the protection recloser cooperated, fault lines which are wrongly judged and can be self-cured through tripping arc blowout are subjected to power supply again after being tripped and the fault lines with faults incapable of disappearing by themselves are isolated through the line selection device, so that power supply reliability is greatly improved.
Owner:SHANDONG KEHUI POWER AUTOMATION

Automatic rapid protection control method of novel feeder

The invention particularly discloses an automatic rapid protection control method of a novel feeder. The automatic rapid protection control method comprises the following steps of: 1, mounting an STU (smart terminal unit) on each circuit switch and each interconnection switch in a network distribution structure, configuring a protective element into each STU, connecting the adjacent STUs, forming an annular network, and finally, connecting the annular network to an automatic main station of the feeder; 2, configuring each element in network distribution; 3, rapidly identifying a fault by the STUs according to local and adjacent current information and switch position information; 4, transmitting the fault identifying result to the adjacent STUs and the automatic main station of the feeder through a communication network by the STUs, and 5, carrying out isolation and power supply restoration on the fault. The automatic rapid protection control method has the beneficial effects that: an FTU (feeder terminal unit) in an original feeder is upgraded into the STU with intelligent judgment ability; and the fault section can be rapidly located by the local and adjacent current information and switch position information, so that isolation of a fault area and the power supply restoration of a non-fault area are achieved.
Owner:SHANDONG UNIV

Intelligent management method and system for cascading switching stations of distribution network

The invention discloses an intelligent management method and system for cascaded switching stations of a distribution network. The switching stations are all provided with fault handling terminals, each of which is connected to the optical fiber ring network through an Ethernet switch, and each of the fault processing terminals is provided with a communication server, and all of the communication servers Both are connected to the power distribution master station. The invention introduces the idea of ​​line optical fiber differential protection and directional protection into the fault handling of distribution network, and forms an intelligent management system of distribution network cascaded switching stations according to the power supply relationship. The terminal uses the fast communication between the unit networks, only transmits the fault signal, and negotiates independently, which solves the selectivity of the protection action when the feeder is faulty, and realizes fault isolation at one time.
Owner:STATE GRID CORP OF CHINA +3

An Embedded Socket Based on Microprocessor-Based Infrared Remote Control Signal Decoding Mode

The invention relates to a microprocessor-based embedded socket adopting an infrared remote control signal decoding mode. The embedded socket comprises an external power interface, a main board and an output interface, the main board comprises a microprocessor, an infrared receiving module, a direct-current voltage stabilizing power module, a two-way relay driving module and a current detection module. The embedded socket acquires current signals of the output interface, and automatic power off is realized to protect load components when a load current is overhigh; when the load current is a standby current, power is automatically cut off to realize a function of power saving. By the infrared remote control signal decoding mode, decoding of any keys of any infrared remote controls can be realized without infrared signal match learning, and power restoration of the embedded socket is realized. In addition, functions of electric shock prevention and automatic power off can be realized, operations in power restoration are pretty convenient, and functions of master control and control acceptance can be realized.
Owner:徐州康翔精密制造有限公司

Microprocessor-based embedded socket with controlled power interface and USB (universal serial bus) interface and adopting infrared remote control signal decoding mode

ActiveCN104600512AAchieving power restorationRealize restoration of power supply; the present invention can realize electric shock preventionLine/current collector detailsCoupling device detailsInfraredEngineering
The invention relates to a microprocessor-based embedded socket with a controlled power interface and a USB (universal serial bus) interface and adopting an infrared remote control signal decoding mode. The embedded socket comprises an external power interface, a main board and an output interface, the main board comprises a microprocessor, an infrared receiving module, a direct-current voltage stabilizing power module, a two-way relay driving module and a current detection module. The embedded socket acquires current signals of the output interface, and automatic power off is realized to protect load components when a load current is overhigh; when the load current is a standby current, power is automatically cut off to realize a function of power saving. By the infrared remote control signal decoding mode, decoding of any keys of any infrared remote controls can be realized without infrared signal match learning, and power restoration of the embedded socket is realized. In addition, functions of electric shock prevention and automatic power off can be realized, operations in power restoration are pretty convenient, and functions of master control and control acceptance can be realized.
Owner:高域智能卫浴科技(江苏)有限公司

Elastic distribution network planning method based on extreme disturbance events

The invention discloses an elastic distribution network planning method based on extreme disturbance events. The key technology of disaster-resistant power grid planning based on lifeline engineeringis studied deeply and power supply restoration of the distribution network for the lifeline engineering is considered. Restoration of a power-loss component and an important load in a grid is used asa primary goal, the attention is paid to rapidity, and the time efficiency is emphasized. With the system power generation capacity obtained at the beginning of the recovery process, a segmentation switch and a connecting switch that are associated with the important load are searched to realize reasonable power transmission to the grid, so that the system network is restored step by step within short time. An operable communication switch directly connected to a power outage area in the network is searched to restore power-outage loads as many as possible. And an operable communication switchnot being directly connected to the power outage area in the network is searched to overcome the defect that all loads can not be restored by the local distribution network, so that the coordinationwith the local distribution network recovery is realized.
Owner:JIANGSU ELECTRIC POWER CO +1

A Microprocessor-Based Infrared Remote Control Signal Decoding Method External Plug-in Socket

The invention relates to a microprocessor-based external-plug type socket adopting an infrared remote control signal decoding mode. The socket comprises an external power plug, a main board and an output interface, the main board comprises a microprocessor, an infrared receiving module, a direct-current voltage stabilizing power module, a two-way relay driving module and a current detection module. The external-plug type socket acquires current signals of the output interface, and automatic power off is realized to protect load components when a load current is overhigh; when the load current is a standby current, power is automatically cut off to realize a function of power saving. By the infrared remote control signal decoding mode, decoding of any keys of any infrared remote controls can be realized without infrared signal match learning, and power restoration of the external-plug type socket is realized. In addition, functions of electric shock prevention and automatic power off can be realized, and operations in power restoration are pretty convenient.
Owner:高域智能卫浴科技(江苏)有限公司

Handling method of small current grounding fault with line selection device and protection anti-stealing trip

The invention discloses a line selection device and protection non-fault-trip prevention cooperation small current grounding fault processing method, and belongs to a power system relay protection field. The line selection device and protection non-fault-trip prevention cooperation small current grounding fault processing method comprises steps that step 1001, the line selection device is used to determine a faulted line; a step 1002, the line selection device is used to control the trip-out of the faulted line; step 1003, the non-fault-trip prevention closing is executed; step 1004, the line selection device is used to determine whether the fault after the trip-out disappears; step 1005, the determining of the faulted line is wrong; step 1006, the determining of the faulted line is right; step 1007, whether the fault occurs again is determined; step 1008, the faulted line is restored; step 1009, a trip-out and non-fault-trip prevention locking instruction is transmitted; step 1010, the faulted line is isolated. The line selection device and protection non-fault-trip prevention cooperation small current grounding fault processing method is advantageous in that after the faulted line is determined by the line selection device, a trip-out operation circuit is directly controlled, and by adopting the cooperation between a trip-out control circuit and the non-fault-trip function of the protection device, the isolation of the small current grounding fault is realized.
Owner:SHANDONG KEHUI POWER AUTOMATION

Infrared remote control signal decoding mode socket based on micro processor

The invention relates to an infrared remote control signal decoding mode socket based on a micro processor. The socket comprises an external power plug, a main board and an output jack; the main board comprises the micro processor, an infrared receiving module, a direct-current stabilized power source module, a double-way relay driving module and a current detecting module. A power source connecting device collects current signals of the output jack and automatically cuts off power to protect load elements when a load current is too large and automatically cuts off the power when the load current is a standby current to achieve the power-saving function. An infrared remote control signal decoding mode can decode any key of any infrared remote controller without matching learning of infrared signals so that the power source connecting device can recover power supply. The electric shock preventing and automatic power-off functions can be achieved, operation is convenient when power supply is recovered, and in addition, the master control and the controlled functions can be achieved.
Owner:高域智能卫浴科技(江苏)有限公司

A single-phase ground fault automatic processing method and processing system

ActiveCN110190591BThe characteristics of electrical quantity are obviousImprove accuracyEmergency protection detectionShort-circuit testingPower stationPower flow
The invention discloses a single-phase grounding fault automatic processing method and processing system. The faulty phase-grounding type arc extinguishing device configured on the busbar of the power station and the internally integrated faulty phase-to-grounding incremental principle and fault The terminal based on the phase-to-ground disconnection incremental principle, when a single-phase ground occurs on the distribution line, the terminal uses the disturbance information caused by the action process of the faulty phase-to-ground type arc extinguishing device to realize the section positioning alarm of the instantaneous single-phase to ground fault It is isolated from the nearest tripping of permanent single-phase grounding faults, and further combined with the delay closing function after the loss of voltage on one side of the contact switch configuration, and cooperates with the terminal fault phase grounding disconnection of the terminal along the distribution line. The protection action delay time Two sets of fixed values ​​according to different tidal current directions are adopted to realize the restoration of power supply in the healthy section downstream of the permanent single-phase ground fault section.
Owner:STATE GRID SHAANXI ELECTRIC POWER RES INST +2

Power distribution network adaptive differential protection self-healing method based on wireless communication

The invention discloses a power distribution network adaptive differential protection self-healing method based on wireless communication, which is characterized by comprising the steps that 1, based on an intelligent distributed platform connected with a wireless communication system, one of a plurality of intelligent distributed terminal DTUs receives and synchronizes differential protection data from other DTUs based on a sampling point interpolation synchronization method and an IRIG global time synchronization method, and then the differential current in the intelligent distributed platform is detected; 2, overcurrent switches in the platform are sequentially detected based on the differential current, and after an overcurrent circuit breaker is detected, tripping operation is executed on the overcurrent circuit breaker to realize fault isolation; and 3, after fault isolation is completed, a downstream switch of the fault point transmits remote signaling to the downstream side, and an optimal load transfer scheme is selected based on interconnection switch data and a self-healing strategy. According to the scheme, monitoring control of the operation state of the power distribution network and rapid positioning, isolation and recovery of power distribution network faults can be achieved, the reliability is high, and the cost is low.
Owner:CHINA SOUTHERN POWER GRID COMPANY +1
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