Dynamic Monitor for Distribution Networks DMR-D
In the future, stricter requirements will be put in place for the economic management of distribution networks.
The required optimization processes in the distribution networks correspond to those that have already been started in the superimposed networks. In addition to production systems, highly-automated production systems with interfaces to the distribution network are used by customers. Furthermore, additional compensation units for reactive current compensation are installed in the distribution networks.
All in all, this leads to a new load situation for the distribution networks. The higher load is accompanied by changed network dynamics that impede the operation and allow the electrical systems to become structurally more unstable. Thus, the reduction of the short-circuit powers on all voltage levels (for example) can lead to the network becoming less damped.
However, to operate safely, the distribution network operator must be able to actively monitor the changing processes in order to detect weak spots early on. Furthermore, to determine the cause, it must always be possible to deduce which party in the relationship between the operator of the superimposed network, the operator of the distribution network and the customer carried out the changes in their network which resulted in problems or increased costs in operating the networks. These days every individual network operator optimizes his own network according to his requirements without coordinating the procedures with the other operators. With the help of the DMR-D dynamic monitor, weak spots can be identified and a new form of network service can be provided. The information from the DMR-D can be used, for example, as an input for scenario planning or scenario controls for distribution networks. Data compression via the DMR-D also creates an ideal basis for communication between processes and service personnel, as well as between processes and strategic asset management. The development of damping measures over time and the Lyapunov exponents form the criteria for monitoring the network dynamics. The larger the Lyapunov exponent, the "quicker" the network will reach the critical management steps. In marginal cases the network will become unstable.
The network does not break down in the distribution network area, but instead reacts with ground faults or short circuits that can cause major damage. Those new dynamics responsible for these error functions can generally not be identified by the conventional safety system.