A shipboard power system is a stiff, isolated power system. Power is generated locally, and distributed over short distances making the system vulnerable to transients. Power quality problems such as voltage sags, which arise due to a fault or a pulsed load, can cause interruptions of critical loads. This can be of a serious concern for the survivability of a combat ship. A series voltage injec...

This paper presents an integrated methodology applied to photovoltaic (PV) plants for improving the dynamic performance of electric power systems. The proposed is based on primary frequency control, which adds ancillary signal voltage reference DC-link source converter (VSC) in order reduce oscillations. computed by relating energy stored VSC and synchronous machine’s shaft. In addition, consid...

A distributed optimal voltage control (DOVC) strategy based on the alternating direction method of multipliers (ADMM) is proposed for AC grid with source converter (VSC) DC connection and offshore wind farms (OWFs). The DOVC achieves global power distribution inside to minimize losses while minimizing bus deviation from rated value as well several OWFs. flow (OPF) VSC combined model predictive ...

Traditional DC transmission technology has obvious defects in power adjustment speed, loss reduction, protection and control, etc., it been unable to meet the diverse needs of electricity consumption. The flexible system not only solves above shortcomings, but also advantages independently controllable supply passive network. It is widely applied distributed generation by new energy, micro grid...

Abstract A conventional hybrid circuit breaker (HCB) is used to protect a voltage source converter-based high direct current transmission system (VSC-HVDC) from short fault. With the increased converter capacity, DC protection equipment also requires regular upgrade. This paper adopts novel type of HCB with fault limiter (FCLC), and focuses on responses during faults, which are associated param...

We employ a novel data-enabled predictive control (DeePC) algorithm in voltage source converter (VSC)-based high-voltage DC (HVDC) stations to perform safe and optimal wide-area for power system oscillation damping. Conventional is model based. However, practice, detailed accurate parametric models are rarely available. In contrast, the DeePC uses only input-output data measured from unknown pr...

This paper describes a new design for direct sliding mode method with a high switching frequency using the PD-PI type sliding surface applied to a negative output Luo converter worked in continuous current mode for applications required constant power source such as aerospace applications, medical equipment and etc. Because of the output power and line changes, the converter model is also nonli...

The interaction between the voltage source converter (VSC) and weak grid causes a negatively damped or diverging oscillation (DVO). generally evolves into sustained (STO) when governed by nonlinearities in VSC's control system, such as saturation of pulse width modulation (PWM). conventional small-signal impedance/admittance modelling (SSIM/SSAM) stability analysis methods are not suitable for ...

In this paper, based on steady-state models of Flexible AC Transmission System (FACTS) devices, the sizing of static synchronous series compensator (SSSC) controllers in transmission network is formed as an optimization problem. The objective of this problem is to reduce the transmission losses in the network. The optimization problem is solved using particle swarm optimization (PSO) technique....