Electromagnetic Disturbances in Power Systems and Customers

Considering the aforementioned. Electro-technical Research Association in Japan had carried out investigations of disturbances of digital control circuits in generator stations and substations experienced by all the Japanese utilities for 10 years from 1990 [1]. The total number of the disturbances is 330, and one-third is for the protective relays. For protective relays show the largest number, the detail of disturbances of the protective relays is presented in [2,3]. [Pg.393]

Similarly to the aforementioned, electromagnetic disturbances in customers have become a significant problem and a number of surveys were carried out by utilities and public organizations related to customers and home appliances [4-9]. For example, it was reported that there were more than 1000 cases of damages in the home appliances in one year in one Japanese utility. [Pg.393]

This chapter summarizes the disturbances experienced in Japan including disturbed equipments, surge incoming routes, and the characteristics of the disturbances [1,10]. The influence of the disturbances to power system operation including countermeasures and costs is explained. Some case studies are demonstrated. [Pg.393]

lightning surges to customers due to nearby lightning and from a communication line are described with measured and simulation results. [Pg.393]

Finally, an analytical method is explained for calculating an induced voltage to a pipeline or a communication line from a power line. [Pg.393]

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