Small signal stability analysis of power systems with high penetration of wind power

Abstract

The integration of large amount of wind power into a power system imposes a new challenge for the secure and economic operation of the system. It is necessary to investigate the impacts of wind power generation on the dynamic behavior of the power system concerned. This paper investigates the impacts of large amount of wind power on small signal stability and the corresponding control strategies to mitigate the negative effects. The concepts of different types of wind turbine generators (WTGs) and the principles of the grid-connected structures of wind power generation systems are first briefly introduced. Then, the state-of-the-art of the studies on the impacts of WTGs on small signal stability as well as potential problems to be studied are clarified. Finally, the control strategies on WTGs to enhance power system damping characteristics are presented.

Developing feedback model for power system dynamic sensitivity analysis

“…Equation 15 can be built for each dynamic component, and it constitutes the basic block for analyzing the interactions among the components in a power system. It describes individual component dynamics in the frequency domain.…”

“…It describes individual component dynamics in the frequency domain. Another advantage of building the input-output transfer function model as Equation 15 lies in its amenity in packing any individual dynamic component into a block. Assume the component j and k will be combined forming a new block denoted as JK.…”

“…Recently, there are huge interests from both the academy and the industry to understand the impacts of the renewable energies on the power system dynamics. Other studies investigated the penetration of wind power on the small‐signal stability of a power system; Quintero et al studied the impacts from the converter‐based components on the system dynamics; Eftekharnejad et al and Tamimi et al demonstrated the dynamic impacts on the power systems brought by the solar power; Naik et al researched the impacts of reduced inertia on the system transient stability; Some studies explored the impacts of renewable integration on system reliability and planning; Li et al designed the inertia control methods for doubly fed induction generator. Among these researches, the major approaches on evaluating the impacts of renewable components on power system stability are solving the eigenvalues or disturbed trajectories of a power system before and after the renewable energy components replace the conventional generators.…”

Observer based sliding mode frequency control for multi-machine power systems with high renewable energy

“…Increased penetration of wind energy leads to increased rate of variation of net load demand on the grid with reduced operational stability [1]. Large scale integration of wind energy may lead to increase in interarea oscillations [2]. When these sources are synchronized with thermal power generation stations, there are many issues arising such as increased frequency fluctuations, increased losses and reduced operating efficiency.…”

Invisible transportation infrastructure technology to mitigate energy and environment

“…To mitigate energy consumption when the vehicle needs to run on a maglev area, additional technology has also been proposed to implement wind energy into the vehicle while it is in motion as a backup energy source. Thus, a detailed mathematical modeling using Matlab Simulink software has been implemented for this wind energy utilization for the vehicles by performing turbine and drivetrain modeling [ 11 – 13 ]. A concerted research effort has been performed recently on climate science and found that currently 400 ppm CO 2 is present in the atmosphere causing global warming, which required to cut down 300 ppm CO 2 to confirm global cooling at comfortable stage [ 14 – 16 ].…”