local site conditions have a strong effect on ground response during earthquakes. two important soil parameters that control the amplification effects of seismic motions by a soil column are the soil hysteretic damping ratio and shear wave velocity. this paper presents the results of in situ damping ratio measurements performed using continuous surface wave attenuation data at a site in semnan ...

Wind power, photovoltaics and other new energy sources are connected to the grid on a large scale. The power electronic interface cannot provide inertia damping support for microgrid. virtual synchronous generator technology is introduced into inverter control system. Unlike generator, its parameters flexible adjustable, which can enhance robustness of This paper firstly analyzes influence mome...

We study backward stochastic Riccati equations (BSREs) arising in quadratic optimal control problems with infinite dimensional stochastic differential state equations. We allow the coefficients, both in the state equation and in the cost, to be random. In such a context BSREs are backward stochastic differential equations living in a non-Hilbert space and involving quadratic non-linearities. We...

A transient damping method (TDM), introducing the frequency of a virtual synchronous generator through high-pass filter (HPF) to power reference, is usually adopted stabilize system against disturbances. However, different from small-signal stability perspective, this letter reveals that gain H...