61results about How to "Avoid widespread power outages" patented technology

The invention discloses a typical daily load characteristic-based power load forecasting method, including: collecting power load data of users in a set industry in a set area, and performing preprocessing on the data; obtaining typical daily load curves of the users and an industry overall load curve; obtaining a correlation coefficient of the typical daily load curves of the users; classifying the users according to a power utilization laws of the users; and selecting a user whose power load change trend has the highest consistency with an industry overall load change, and forecasting power load data of an overall industry through the power utilization behavior laws of the user. The typical daily load characteristic-based power load forecasting method provided by the invention has the beneficial effects of being capable of deriving a forecast of an abnormality of a specific industry and even a whole society power load abnormality from an abnormality of a certain user power load, improving accuracy of a power load forecasting result, and providing a power guarantee for reasonable economic dispatching of an electric power system, reduction of production cost, and prevention of a large-area power failure of a power grid or a power grid breakdown.

The invention provides an online fault monitoring method for a lightning arrester. The method comprises the following steps of: receiving report information which at least comprises a voltage value and / or a current value and is sent by one or more feeder terminals through a wireless communication module in real time, calculating a difference value between the voltage value or the current value anda preset voltage value or a preset current value, and determining whether the difference value exceeds a preset error range or not; and if the difference value exceeds the preset error range, determining that lightning arresters where the feeder terminals corresponding to the reported information are located fail. The remote monitoring platform is used for monitoring the fault condition of each lightning arrester in real time; once a fault occurs, the faults of the lightning arresters can be quickly determined and the positions of the faulted lightning arresters can be positioned, maintenancepersonnel can quickly maintain the lightning arrester, time for troubleshooting fault points one by one due to faults of the lightning arrester in the prior art is greatly saved, the fault lightningarrester can be quickly replaced, a transformer or a line can be prevented from being struck by lightning to the maximum extent, and possible large-area power failure can also be avoided.

The invention relates to an unmanned aerial vehicle intelligent inspection identification method for a power transmission tower, wherein an intelligent inspection system is adopted to inspect an insulator, and the intelligent inspection system comprises an image acquisition module carried by an unmanned aerial vehicle, a preprocessing module, a feature extraction module, a feature fusion module, a prediction judgment module and a fault reporting module. The identification method specifically comprises the following steps: 1) shooting an image of the insulator and transmitting the image to the preprocessing module; 2) performing non-local average denoising processing on the image and inputting the image into a feature extraction module; 3) adopting a neural feature extraction network to extract insulator shape features and fault features;4) carrying out feature fusion on the extracted high-dimensional features, and 5) judging the features through a prediction regression network. According to the power transmission tower insulator fault identification method, real-time identification of the power transmission tower insulator fault is rapidly and accurately achieved, and the maintenance efficiency of the insulator is improved.

The invention provides an emergency control method and system based on branch transient power transmission capacity. According to the method and the system, the amplitude and the phase of node voltages at two ends of a branch which are easy to measure are used as information sources, a branch transient power transmission capability BTTC quantitative evaluation index is constructed, and whether anemergency control measure is taken or not is judged according to the BTTC index of the branch with the minimum BTTC index in an interconnected power grid. According to the method and the system, a wide-area measurement technology and a high-speed communication technology are fully utilized, a response-based power system wide-area safety and stability control system is constructed, real-time decision and real-time control are realized, whether transient stability exists or not can be precisely judged, and the stability level is rapidly and quantitatively evaluated; the method and the system donot depend on off-line or on-line simulation calculation, do not need to anticipate an operation mode and a fault set, are not limited to local information, can effectively avoid the risk of failure of safety and stability control measures, ensure safe and stable operation of a power system and prevent large-area power failure.

The invention provides an active defense method for a key area power grid in a typhoon mode. The active defense method comprises the steps of S1, determining power flow transfer characteristics of thekey area power grid in a fault mode; S2, actively searching a prevention and control section based on the power flow transfer characteristics; S3, performing zero-cutting control on the prevention and control section searched by the key area power grid and the large power grid; S4, controlling generators and loads in the key area power grid; S5, controlling the emergency capacity of the active power of the key area power grid in advance; S6, determining the optimal opportunity of active defense; and S7, carrying out generator tripping and load shedding optimization control. According to the method, in consideration of the situation that simultaneous fault tripping of a plurality of tie lines is possibly caused in the extreme disaster climate invasion process, an active defense section search strategy is provided based on the thought of power flow pre-control, and the strategy can ensure that the impact on the key area power grid is the minimum when the plurality of tie lines break down.

A GIS bus communication pipe separating overhauling method comprises the steps that when GIS overhaul or GIS fault emergency maintenance is conducted, under the condition that multi-interval bus air chambers are communicated, buses without segmentations are separated artificially so as to avoid power interruption of a user side due to outage of the buses; corrugated pipes among bus communication pipes and connection conductors and contacts inside the bus communication pipes are demounted, and thus the corrugated pipes and buses of the corrugated pipes of the bus air chambers not in an overhaul range are additionally provided with end fittings and close covers under the condition that insulation of GIS air chambers is met; due to the fact that separation operation is conducted on the corrugated pipes among the bus communication pipes, operation of detection and separation on damaged sections caused by bus flashover is completed, and the work of the buses at normal sections is ensured. The GIS bus communication pipe separating overhauling method is applied to GIS overhaul or GIS fault emergency maintenance, the power interruption of the user side due to outage of the buses can be avoided, power failure time can be shortened, overhaul time is saved, and power supply is restored more rapidly; meanwhile, normal operation such as bus changeover can be achieved conveniently, power supply quality is ensured, and power resource cost is saved.

The invention relates to the field of electric power equipment, and particularly relates to a power transmission line overlapping maintenance judgment method and system. Electrical connection formed by a target power transmission line and a power transmission line under maintenance is searched by using a "binary tree" traversal algorithm and displayed so that work personnel are enabled to rapidly identify the power outage influence caused by maintenance of the target power transmission line. Meanwhile, whether overlapping maintenance is formed between the target power transmission line and the power transmission line under maintenance is judged, and maintenance arrangement is timely adjusted before performing maintenance of the target power transmission line so that the phenomenon of large-area power outage of important transformer substations or first-class customers caused by overlapping maintenance of the power transmission line can be effectively avoided.