Protection, transient stability and fault ride-through issues in distribution networks with dispersed generation

This paper describes the transient stability analysis of a 10 kV distribution network with wind generators, microturbines and CHP plants. The network being modeled in Matlab/Simulink takes into account detailed dynamic models of the generators. Fault simulations at various locations are investigated. For the studied cases, the critical clearing times are calculated. Some network parameters which influence transient stability are also observed. The compliance of DG protection to stability criteria requirements is further studied. The ride-through capability of the DG units is also investigated through transient stability analysis and the equivalent CCT-voltage dip curves are derived. It is concluded that during fault DG unit availability can be increased through modification of undervoltage protection requirements

An Intelligent Algorithm for Smart Grid Protection Applications

Electrical Sustainable EnergyElectrical Engineering, Mathematics and Computer Scienc

Transient stability analysis of a distribution network with distributed generators

This letter describes the transient stability analysis of a 10-kV distribution network with wind generators, microturbines, and CHP plants. The network being modeled in Matlab/Simulink takes into account detailed dynamic models of the generators. Fault simulations at various locations are investigated. For the studied cases, the critical clearing times are calculated. Results obtained from several case studies are presented and discussed.Electrical Sustainable EnergyElectrical Engineering, Mathematics and Computer Scienc

Short circuit behavior of distribution grids with a large share of distributied generation units

increasing rapidly. Most of these units are connected to the distribution grid. With the increasing penetration level the impact of these units on for instance power flows, fault levels and protective systems cannot be neglected anymore. To allow an increasing penetration level of DG without causing protection problems or unacceptable power flows and fault levels the impact of DG has to be studied thoroughly. Therefore in cooperation with Dutch grid operators and two technical universities a research project has started which focuses on protection issues, fault ride-through behaviour and autonomous operation of distribution grids including DG. In this paper an outline of the project is given and some results are presented

Short circuit behavior of distribution grids with a large share of distributied generation units

increasing rapidly. Most of these units are connected to the distribution grid. With the increasing penetration level the impact of these units on for instance power flows, fault levels and protective systems cannot be neglected anymore. To allow an increasing penetration level of DG without causing protection problems or unacceptable power flows and fault levels the impact of DG has to be studied thoroughly. Therefore in cooperation with Dutch grid operators and two technical universities a research project has started which focuses on protection issues, fault ride-through behaviour and autonomous operation of distribution grids including DG. In this paper an outline of the project is given and some results are presented