Impacts of ripple control signals at low voltage customer´s installations

Network operators in different countries of the world use the public networks to send control signals for managing various system operations and for controlling certain loads at different customers´ installations. This signal is called `ripple control signal´ when its control frequency is between 110 Hz and 3000 Hz. In Endinet´s network, ripple control signals are sent at a frequency of 1042 Hz and several times in a day. In the recent years, some customers complained about light flicker incidents at their installations that are observed without any definite known reason. However, in some cases, the times of light flicker incidents happen to synchronise with the time slots of sending of ripple control signals. Hence, it is suspected that the ripple signals might have some influence on light flicker incidents. To investigate the problem, a theoretical analysis is done by simulating the same part of the network and observing the influence of a ripple control signal from its broadcasting point up to the receiving terminal (at customer´s installation).