The basic idea of decentralized demand response systems is not new, however, material presented in the subject matter literature is usually limited to general ideas and possible system services. In this paper, the original stochastic decentralized active demand response (DADR) system is presented in the form of an application-ready control algorithm. The results of simulation investigations have confirmed that the proposed stochastic DADR solution, because of its high dynamic response in dealing with disturbance phenomena, might be used as part of both the primary and the secondary load frequency control in electrical power systems. The applicability of the proposed algorithm for control of refrigerators has been numerically tested for various system parameters. Fulfillment of all assumed DADR system requirements concerning high dynamic, “soft” operation, fair share in service as well as minimization of degradation in comfort of use of DADR controlled devices have been confirmed in numerical evaluations.

Reliable operation of the smart grid requires assurance of the electromagnetic compatibility of sensitive smart metering systems and power electronic converters, which introduce high-level electromagnetic interference. As it has been experimentally shown, currently available, normalized, and frequency domain tests are ineffective for the evaluation of data transmission error hazards. The mathematical time-domain model proposed in this paper enables assessment of the probability of errors occurring in a given transmission signal for known interference parameters. The validity of the model and its practical applicability have been experimentally verified.

Presented in this paper are the results of research connected with common mode (CM) interference generated by ac/dc/dc power electronic interfaces, which will very probably be commonly used in the future vehicle-to-grid systems. The results obtained show that the conducted CM interference generated by these converters in a low-voltage grid can be coupled to a medium-voltage (MV) network and observed at distant points under overhead MV lines. The developed passive CM voltage compensator dedicated for ac/dc/dc interfaces is recommended as an effective method for conducted interference reduction, preventing both aggregation and flow of interference in distant circuits.