46results about How to "Avoid large-scale power outages" patented technology

The invention provides a method for preventing a damping wire of a ground wire of a transmission line from breaking. According to the method provided by the invention, by utilizing a protecting device (3) consisting of two rectangular protective blocks which are arranged in a bilateral symmetry mode, corrosion destruction of various corrosive gases, ultraviolet rays, moral integrity rainwater and water steam above a stream of the outside on the ground wire (1) of the transmission line and the damping wire (3) are isolated, thus improving the corrosion resistance and breaking resistance of the damping wire of the ground wire of the transmission line, achieving the purpose of durability of the damping wire of the ground wire of the transmission line, and improving the corrosion resistance of the damping wire of the ground wire of the transmission line. With the adoption of the method, the corrosion resistance to metals of the damping wire of the ground wire of the transmission line is obvious, accidents of power failure in a large area due to grounding short circuit faults of the transmission line due to breaking of the damping wire of the ground wire are prevented, the grid power transmission and distribution safety production level is increased, and the method is suitable for protecting the damping wire of the ground wire of the transmission line.

The invention discloses a power transmission line concrete rod weld joint corrosion prevention method. According to the method, a protection device with the inner diameter equal to the outer diameter of a concrete rod and being provided with upper and lower seal rings is adopted to isolate the corrosive damage from corrosive gases of all kinds outside, ultraviolet as well as frost and rain water to the weld joints and the metal at the heat affected zone of the weld joints of the power transmission line concrete rod so as to improve the corrosion resistance of the concrete rod. The method has an obvious effect of preventing the corrosions at the weld joints and the metal at the heat affected zones of the weld joints of the power transmission line concrete rod, and can effectively prevent power failure in large area caused by collapse of the power transmission line concrete rod due to the cracking of the concrete rod caused by corrosion of the weld joints. Therefore, the method can improve the production safety level of power transmission and distribution. The method is applicable for protection for weld joints of power transmission line concrete rods and concrete frames of transform substations.

The invention belongs to the technical field of power transmission line state monitoring, and discloses an online monitoring system for galloping of an overhead power transmission line. The online monitoring system is characterized in that the online monitoring system for the line of each span consists of a plurality of monitoring substations, two monitoring master stations and a background monitoring upper computer, wherein the monitoring substations are arranged on the transmission line; the two monitoring master stations are arranged on towers respectively; the background monitoring upper computer is arranged in a monitoring center; the two master stations and the plurality of substations monitor the galloping state of the line of each span; the substations accurately position the galloping of the line by utilizing acceleration sensors, and upload positioning data to the master stations through short-range radio frequency; each master station receives galloping monitoring data from four nearby substations, and uploads the monitoring data and environmental meteorological data to the background monitoring upper computer through a general packet radio service (GPRS); and when each master station synchronizes a clock through a global positioning system (GPS) module, the synchronism of the uploaded data is ensured. The online monitoring system has a small volume, low influence on mechanical properties of the line, high dynamic performance and high data monitoring accuracy, is low in cost, and can work round the clock.

The invention discloses a method for controlling the input of standby power at the power supply side of a hot standby line based on fiber optic channels. In this scheme, station C is applied to the primary main connection of the 110kV inner bridge of a 110kV substation; main wiring. Solve the problems of high capacitive reactive power in substations and grid reactive power reverse, improve the voltage level of substations, prevent local grid voltage from being too high, and improve the overall operation level of the grid. It reduces equipment loss and insulation aging, improves the operating efficiency of the main equipment of the substation, improves the power factor of the substation, and improves the economy of power grid operation. Effectively avoid the occurrence of large-scale blackout accidents when the main power supply line fails permanently, realize the self-healing of the power grid, and improve the reliability of power supply. The invention can be used as the technical guarantee for the special operation mode of the power grid, greatly improves the safety risk control under the special operation mode, and promotes the safe and stable operation of the power grid.

The invention discloses a method for dynamically controlling the state machine of relay protection equipment in an intelligent substation, including defining the state sets of various relay protection equipment in the intelligent substation; defining the control direction of the state transition diagram of the relay protection equipment, forming various relay Electrical protection equipment state transition diagram; define the trigger conditions for the state transition of various relay protection equipment in smart substations; dynamically match the current state of each relay protection equipment in smart substations; complete the dynamic detection of trigger conditions for relay protection equipment state transitions; output The status results of the relay protection equipment realize the status identification of the relay protection equipment of the smart substation; the method provided by the invention can dynamically identify the status of the relay protection equipment of the smart substation, and realize the non-corresponding monitoring and maintenance of the primary and secondary equipment operating status of the smart substation Lay the foundation for the application of security checks.

The invention discloses a method for identifying mountain fires in power transmission lines based on temperature distribution, which comprises the following steps: 1), preprocessing of mountain fire monitoring images and color mode conversion; 2), preliminary judgment of flames based on color features; 3) , Mountain fire feature extraction based on color feature difference; 4), Mountain fire identification based on temperature distribution. The mountain fire identification method of transmission lines provided by the present invention can effectively identify the mountain fire area in the image by considering the inhomogeneity of the temperature distribution of the flame area, and can effectively eliminate interference factors such as sunlight and car lights. The method has clear ideas and is easy to operate , High practicability, can be widely used in the field of transmission line mountain fire monitoring and alarming.

The invention discloses a fiber channel-based hot standby line joint standby power supply input method, which is applied to the following lines: 110kV line 1 and line 2 are respectively connected to 220kV substation A station and substation B station, and the power supply side of line 1 is equipped with Circuit breaker 4DL, circuit breaker 1DL is installed on the load side of line 1; one end of line 2 is connected to the 110kV busbar of substation B station, and the other end is connected to section II busbar of substation C station, circuit breaker 5DL is installed on the power side of line 2, and line 2 There is a circuit breaker 2DL on the load side; a section or inner bridge circuit breaker 3DL is installed between the I-section busbar and the II-section busbar of the substation C; the 110kV side of the substation A station, substation B station, and substation C station are equipped with backup Automatic power supply device; solves the problem of excessive capacitive reactive power in substations and reactive power transfer of the power grid, improves the voltage level of the substation, prevents the local power grid from being too high, and improves the overall operation level of the power grid.

The invention discloses an electric power line distance III-section protection misoperation hidden danger eliminating method and device. The electric power line distance III-section protection misoperation hidden danger eliminating method comprises the following steps that phase-to-phase distance III-section protection or ground distance III-section protection enters start-up logic; whether an unsymmetrical fault occurs is judged according to the electrical characteristics of an electric power line, trip of the ground distance III-section protection directly happens when the unsymmetrical fault occurs; trip of the phase-to-phase distance III-section protection directly happens when a symmetrical fault occurs; the electric power line is judged to be overloaded, the phase-to-phase distance III-section protection or the ground distance III-section protection is blocked, and misoperation of the phase-to-phase distance III-section protection or the ground distance III-section protection is avoided when the symmetrical fault occurs. According to the electric power line distance III-section protection misoperation hidden danger eliminating method and device, trip of the phase-to-phase distance III-section protection or the ground distance III-section protection happens when the unsymmetrical fault or the symmetrical fault occurs and the phase-to-phase distance III-section protection or the ground distance III-section protection can be blocked and misoperation of the phase-to-phase distance III-section protection or the ground distance III-section protection can be avoided when the electricity power line overloads.