References of "IET Generation, Transmission and Distribution"
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See detailTopology and Parameter Estimation in Power Systems through Inverter Based Broadband Stimulations
Neshvad, Surena UL; Margossian, Harag UL; Sachau, Jürgen UL

in IET Generation, Transmission and Distribution (2016)

An increasing number of inverter based power generators have been connected to the distribution network in recent years. This phenomenon, coupled with the adoption of open energy markets has significantly ... [more ▼]

An increasing number of inverter based power generators have been connected to the distribution network in recent years. This phenomenon, coupled with the adoption of open energy markets has significantly complicated the powerflows on the power network, requiring advanced and intelligent parameter knowledge to optimize the efficiency, quality and reliability of the system. This paper describes a method for identifying parameters associated with the power system model. In particular, the proposed algorithm in this paper addresses the line parameter and topology identification task in the scope of state estimation. The goal is to reduce the a priori knowledge for state estimation, and to obtain online information on the power system network. The proposed parameter estimation method relies on injected stimulations in the network. Broadband stimulation signals are injected from distributed generators and their effects measured at various locations in the grid. To process and evaluate this data, a novel aggregation method based on weighed least-squares will be proposed in this paper. It combines and correlates various measurements in order to obtain an accurate snapshot of the power network parameters. In order to test its capabilities, the performance of this algorithm is evaluated on a small-scale test system. [less ▲]

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See detailDistribution Network Protection Considering Grid Code Requirements for Distributed Generation
Margossian, Harag UL; Deconinck, Geert; Sachau, Jürgen UL

in IET Generation, Transmission and Distribution (2015), 9(12), 1377-1381

The amount of inverter based distributed generation (DG) connected to the low and medium voltage levels is increasing rapidly. Their growing impact on the power system has already driven some distribution ... [more ▼]

The amount of inverter based distributed generation (DG) connected to the low and medium voltage levels is increasing rapidly. Their growing impact on the power system has already driven some distribution network operators to start imposing requirements on their operation similar to those described in transmission grid codes. This paper studies how different grid code requirements can affect the fault current levels in the distribution network and explores the possibility of using the grid code requirements to ensure the reliability and selectivity of the protection of distribution feeders. [less ▲]

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