96 results about "Salt deposit density" patented technology

Contamination monitoring of high voltage insulators provides a system and method producing an early predictor for high voltage insulator failure, allowing repairmen to either already be on site when a high voltage insulator fails in order to expedite repair time, or allowing repair and / or replacement of a faulty insulator before the failure actually occurs. The system and method provide transmission of an alarm signal when contaminant levels (such as equivalent salt deposit density (ESDD) levels) formed on a high voltage insulator exceed pre-selected threshold values, indicating the likelihood of high voltage insulator failure.

Contamination monitoring of high voltage insulators provides a system and method producing an early predictor for high voltage insulator failure, allowing repairmen to either already be on site when a high voltage insulator fails in order to expedite repair time, or allowing repair and / or replacement of a faulty insulator before the failure actually occurs. The system and method provide transmission of an alarm signal when contaminant levels (such as equivalent salt deposit density (ESDD) levels) formed on a high voltage insulator exceed pre-selected threshold values, indicating the likelihood of high voltage insulator failure.

The invention discloses a method for measuring the contamination degree of the surface of an electric power insulator. The method comprises the following steps: scrubbing and sampling contaminants on the surface of the insulator with a cleaning and sampling cloth, weighing to obtain a mass difference m1 before and after sampling with the cleaning and sampling cloth, immersing the contaminant-contained sampling cloth after sampling into deionized water to dissolve soluble contaminants, measuring the conductivity of the resulting contaminant-containing deionized solution, converting to a soluble contaminant mass m2, converting to a salt deposit density, calculating to obtain the insoluble contaminant mass m1-m2, and converting to a dust density to obtain the contamination degree of the surface of the electric power insulator. Compared with the prior art, the method of the invention breaks measuring sequences of traditional measuring methods, uses drying and weighing to substitute filtering and drying in the traditional methods, and has the advantages of effective reduction of sampling and measuring errors, sampling and measuring period shortening, and convenience for grasp and popularization.

The invention discloses an equivalent salt deposit density (ESDD) prediction and early warning system for a power insulator surface contaminant, which comprises four function units of a genetic algorithm training unit, a BP (Back Propagation) neural network training unit, a genetic BP neural network predication unit and an early warning unit. The genetic algorithm is good at global search, the BP neural network is good at local search, and thus, when the genetic algorithm and the BP algorithm are combined, the prediction accuracy can be improved, and the algorithm convergence rate is improved. The genetic algorithm firstly optimizes the initial weight of the neural network, good search space is positioned, and the BP algorithm is then adopted to search the optimal value in the small space. The application conditions are wide, the system can be applied to insulators of any types and is not influenced by different contaminant accommodation features due to different insulator types, and the prediction method and the early warning system can realize insulator ESDD prediction, and give contaminant flashover and early warning signals.

The invention discloses an electric insulator cleaning device which comprises a water channel, a connecting rod, a limiting column, a tension spring, an electric cleaning head, a flexible shaft, an electric cleaning arm, a stepping motor, a cleaning joint seat and an arm connection joint seat. One end of the connecting rod is fixed on the upper edge of the water channel, the limiting column is arranged on the upper edge of the water channel and located at the other end of the connecting rod, the rod body of the connecting rod is fixedly connected with one end of the tension spring, the other end of the tension spring is fixed on the upper edge of the water channel, the tension spring enables the connecting rod to be tightly attached to the limiting column, the electric cleaning head is connected with a cleaning joint above the water channel through the flexible shaft, the electric cleaning arm is arranged on the upper portion of the cleaning joint seat, and the stepping motor is used for driving the electric cleaning arm to rotate. The electric insulator cleaning device can clean an insulator and collect dirt on the surface of the cleaning head, salt deposit density of an insulator can be obtained and used for assessing the insulating property of the insulator of an electrical power system in a regional environment and the safety performance of a power grid, and the electric insulator cleaning device has good application prospects.

The invention relates to a suspension device of an equivalent salt deposit density insulator. The suspension device comprises an equivalent salt deposit density insulator suspension plate and a fixing bolt assembly, the equivalent salt deposit density insulator suspension plate is of an integrally-formed n-shaped structure, a lifting lug is arranged on the upper portion of the equivalent salt deposit density insulator suspension plate, a suspension hole used for suspending an insulator string is formed in the lower portion of the equivalent salt deposit density insulator suspension plate, a plurality of transversely through fixing holes are formed in the middle of the equivalent salt deposit density insulator suspension plate, and the fixing bolt assembly is fixed in the corresponding fixing holes so that the equivalent salt deposit density insulator suspension plate and an iron tower crossarm can be relatively fixed. The application method includes the step that the fixing bolt assembly is combined with the corresponding fixing holes to be fixed. Compared with the prior art, the suspension device and the application method have the advantages that galvanized parts are adopted, strength is high, and corrosion resistance is good; the suspension device can be used for iron tower crossarms of various specifications, can be flexibly adjusted according to situations, and is convenient to use and firm and reliable in connection; the lifting lug is arranged on upper portion of the suspension plate, so that installation and adjustment are facilitated; machining is convenient, manufacturing cost is low, the labor intensity of operating personnel can be relieved, installation efficiency is improved, application prospects are broad, and promotion value is enormous.