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

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.

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.

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.

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.

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 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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.