41results about How to "Reduce the burden of operation and maintenance" patented technology

The invention discloses an adaptive local type feeder automation fault processing method based on the area serial number, which comprises the following steps: the area range is delimited; The circuitbreaker at the outlet of the substation is connected to the contact switch, and the end of the line is delimited as a logic area; A logical sequence numb is allocated, and that segment switch in eachlogical region independently allocates the sequence number; Switch is provided with unified parameter; Adaptive adjustment of operating parameters is preformed; fault isolation is performed; restore power to non-faulty areas is performed. after the method of the invention is applied, when the distribution network is affected by the changes of the network topology such as the newly added branch lines and the adjustment of the multi-connection operation modes, the original tuning parameters are not considered to be changed, and the automation system can be adaptively operated. At the same time,when the terminal algorithm can not identify the fault due to the large grounding transition resistance, the method can cooperate with the centralized grounding line selection trip or manual trip in the substation to complete the isolation and recovery operation of the high-resistance grounding fault.

The application belongs to the technical field of lightning location for power transmission and distribution lines in electric power systems, and in particular relates to an online distance measurement and fault location method for lightning strike overvoltage. This application discloses a lightning overvoltage online distance measurement and fault location method, which includes installing a number of distributed voltage monitoring sensors on the transmission and distribution lines to monitor the line voltage, using a signal generator to inject pulse signals into the line, and according to each voltage The pulse signal detected by the monitoring sensor is compared to the phase of each cycle of the system power frequency voltage to realize online distance measurement. When the lightning voltage occurs, the location of the fault can be judged by the steep attenuation characteristics of the lightning overvoltage. This application proposes a lightning strike overvoltage online distance measurement and fault location method, which uses the combination of lightning strike overvoltage phase and steepness transmission characteristics to perform online distance measurement and fault location, and realizes accurate and fast lightning strike location of power transmission and distribution lines Positioning greatly reduces the workload of operation and maintenance personnel and improves the reliability of power supply.

The present application belongs to the technical field of lightning location of power transmission and distribution lines, and in particular relates to a lightning strike overvoltage fault location method. In the power system, there is a problem of low measurement accuracy in the method of locating faults in transmission and distribution lines after being struck by lightning. The present application provides a method for locating lightning strike overvoltage faults, which includes monitoring the line state with a number of distributed voltage monitoring sensors, and when the sensors determine that lightning strike overvoltage occurs, uploading the monitored voltage characteristic data to a background positioning host, and the background host The collected data is extracted and analyzed, and the position of the lightning strike point of the line is determined by using the phase transfer characteristics of the first overvoltage signal generated when the line is struck by lightning relative to the system power frequency voltage per cycle. The invention realizes the accurate positioning of the lightning strike position of the transmission and distribution line by combining the pulse signal injection and the phase change characteristics of the lightning strike overvoltage.

The embodiment of the invention discloses a contact information management method, a server and a terminal. The server includes: a first communication unit, a first data processing unit, and a first storage unit; wherein, the first communication unit is configured to obtain contact information of the terminal; and is also configured to push the first contact information to the terminal. A set of contact information; the first data processing unit is configured to generate a set of contact information based on the contact information obtained by the first communication unit; it is also used to count the contact information within a preset time range when the push condition is met The first contact information set communicated by the terminal enables the first communication unit; the first storage unit is configured to store the contact information obtained by the first communication unit, and store the contact information set.