Abstract: The present invention discloses a process for providing a cross-linked composition, the process comprising the steps of (a) providing an ethylene-?-olefin plastomer having—a density of from 850 kg/m3 to 900 kg/m3; and—an melt flow rate (ISO 1133, 2.16 kg, 190° C.) of 0.3 to 50 g/10 min; (b) grafting the ethylene-?-olefin plastomer with silane crosslinker such that the content of silane crosslinker is in the range of 0.1 to 10.0 wt. % with respect to the grafted ethylene-?-olefin plastomer; (c) contacting said grafted ethylene-?-olefin plastomer with 2 to 8 wt. % of a tin-free silane crosslinking catalyst with respect to the resulting mixture of grafted ethylene-?-olefin plastomer and tin-freesilane crosslinking catalyst, wherein said tin-free catalyst comprises a Brönsted acid at 23° C. and 50% relative humidity for at least 15 minutes thus forming a cross-linked composition, wherein gel content of said cross-linked composition after 15 min is at least 60%.

Abstract: A method for recognizing an electrical oscillation in an electrical power supply system, in which an electrical oscillation variable is determined for at least one measuring point in the power supply system. Parameters of an electrical oscillation are calculated on the basis of a time curve of the oscillation variable for the at least one measuring point, and the presence and type of an electrical oscillation is deduced using the parameters. To be able to provide correct parameters for assessing the oscillation in a timely fashion after the start of the oscillation, it is proposed that the number of those successive values of the oscillation variable from which the parameters of the electrical oscillation are calculated is adapted dynamically to the sequence of values of the oscillation variable.

Abstract: A method for recognizing an electrical oscillation in an electrical power supply system, in which an electrical oscillation variable is determined for at least one measuring point in the power supply system. Parameters of an electrical oscillation are calculated on the basis of a time curve of the oscillation variable for the at least one measuring point, and the presence and type of an electrical oscillation is deduced using the parameters. To be able to provide correct parameters for assessing the oscillation in a timely fashion after the start of the oscillation, it is proposed that the number of those successive values of the oscillation variable from which the parameters of the electrical oscillation are calculated is adapted dynamically to the sequence of values of the oscillation variable.

Abstract: A method monitors an electrical energy supply network or a subnetwork of the energy supply network. Measurement values detected at at least two measurement points of the energy supply network or subnetwork are evaluated. More specifically, phase angle values are evaluated as the measurement values or phase angle values determined using the measurement values are evaluated. A check is carried out based on the phase angle values to determine whether the energy supply network or the subnetwork is operating synchronously, and, in the event of an asynchronism identified based on the phase angle values, an island identification signal to be generated.

Abstract: A method monitors an electrical energy supply network or a subnetwork of the energy supply network. Measurement values detected at at least two measurement points of the energy supply network or subnetwork are evaluated. More specifically, phase angle values are evaluated as the measurement values or phase angle values determined using the measurement values are evaluated. A check is carried out based on the phase angle values to determine whether the energy supply network or the subnetwork is operating synchronously, and, in the event of an asynchronism identified based on the phase angle values, an island identification signal to be generated.

Abstract: A method for determining a frequency, an amplitude and an attenuation of at least one output oscillation in an electrical energy supply network. A time window of predefined duration is used and momentary values for the output determined within the time window are used to determine the frequency, the amplitude and the attenuation of the at least one output oscillation. At least one further time window is used, wherein all the time windows are each of different duration. That time window, within the duration of which a predefined number of oscillation processes of the output oscillation under consideration falls, is used for determining frequency, amplitude and attenuation. The invention also describes a data processing arrangement.

Abstract: A method and a device are provided for monitoring an electrical power supply network. A temporal frequency change value is determined for at least two sections or for at least two points of the power supply network. The frequency change value indicates the respective temporal frequency change of the network frequency. A conclusion is drawn regarding a possible islanding within the power supply network, and a warning signal which indicates the possible islanding within the power supply network is generated when the difference between the frequency change values, exceeds a predetermined frequency change threshold value.

Abstract: A method for determining a frequency, an amplitude and an attenuation of at least one output oscillation in an electrical energy supply network. A time window of predefined duration is used and momentary values for the output determined within the time window are used to determine the frequency, the amplitude and the attenuation of the at least one output oscillation. At least one further time window is used, wherein all the time windows are each of different duration. That time window, within the duration of which a predefined number of oscillation processes of the output oscillation under consideration falls, is used for determining frequency, amplitude and attenuation. The invention also describes a data processing arrangement.

Abstract: A method and a device are provided for monitoring an electrical power supply network. A temporal frequency change value is determined for at least two sections or for at least two points of the power supply network. The frequency change value indicates the respective temporal frequency change of the network frequency. A conclusion is drawn regarding a possible islanding within the power supply network, and a warning signal which indicates the possible islanding within the power supply network is generated when the difference between the frequency change values, exceeds a predetermined frequency change threshold value.

Abstract: A method provides the operating personnel of a control center of an electrical energy supply with information about any oscillations that have occurred in an energy supply network. A signal indicating an oscillation of an electrical variable in an electrical energy supply network is generated. A state variable characterizing an oscillation state of the electrical variable is calculated from measured values of current and/or voltage indicators. If an oscillation exists, an amplitude characteristic value indicating the amplitude of the state variable and a damping characteristic value indicating a damping of an oscillation of the state variable are determined. The position of a particular value pair containing an amplitude characteristic value and an associated damping characteristic value is compared with hazard ranges, which are present in a value range and indicate a particular hazard level of the oscillation in the energy supply network. The signal indicating the oscillation is output.