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Aiming at a microgrid system with multiple distributed generation (DG) units, this paper proposes the coordinated control of a flux-coupling-type superconducting fault current limiter (SFCL) and superconducting magnetic energy storage (SMES), so as to improve its transient performance under fault conditions. On the one hand, using the SFCL and the SMES enhances the microgrid’s fault ride-through capability...
This paper presents an analytical aggregation method for generator and its excitation system using structure preserving technique. It exactly considers the voltage deviations resulted from aggregating generators moved to the common bus. The parameters of the equivalent generator and its excitation systems are calculated directly in a non-iterative way. And in this paper, excitation systems of different...
The architecture and performance between substation protection system based on IEC 61850 and conventional system are quite different. The advanced protection system presented in this paper incorporates the Rogowski-coil current sensors and performs over a communication network. Transient characteristics of transformers are researched to analyze its impacts on protective relayings. It is revealed that...
Voltage stability in Medium-Voltage DC (MVDC) power systems on ships is a key design goal. MVDC bus voltage stability can be impaired due to the presence of high-bandwidth controlled Constant Power Load (CPL) converters, which can induce negative incremental resistance instabilities. A linearization via state-feedback control is presented in this paper, to stabilize a MVDC bus voltage in presence...
The accurate degree of power system dynamic simulation is directly related to the stable operation of power system, while the accuracy of load models have a direct influence on simulation results and final decisions. Based on PSASP/UPI, this paper develops an interface method linking the model to the transient stability program. By the transient stability program, load model can be linked to power...
As a dominant distributed generation (DG), wind power turbines are expanding in the grid. However, when large-scale wind farms integrated with the weak grid, it will change the power flow distribution, voltage profile which results in profound influence on transient stability of the power grid. It is important to study the dynamic response characteristics of the wind power generator in the case of...
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