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The MPSS (multiport power supply system) is consist of fuel cell, super capacitor and two DC/DC converters. The energy management scheme, along with the allocation principle of energy storage unit is analyzed. The paper establishes the mathematical model and proposes a composite control strategy. The strategy fuses subsection PI (Proportional and Integral) control and SMC (Sliding Mode Control) based...
In this paper, a novel Dynamic State Estimation–current feedback with STATCOM control scheme is proposed for the mitigation of voltage fluctuation of Solid Oxide Fuel Cell (SOFC) power station connected to the complex power grids during electrical faults. The proposed control scheme is compared to two existing control strategies and shows its superiority in alleviating voltage flickers and deviations...
In this paper, an adaptive network based fuzzy inference system (ANFIS) terminal sliding (TS) mode) controller is suggested for improving the reactive power and overall stability. This ANFIS control system consists of an ANFIS controller and a TS controller which is designed to do as a main controller and the TS controller is designed to cope with disturbances and uncertainties. Small signal model...
DC power systems comprising single-phase DC/AC inverters draw low-frequency AC ripple currents at twice the output frequency from the DC input. Such a 100/120 Hz ripple current may create instability in the DC clean energy system, lowers its efficiency, and shortens the lifetime of the DC source. This paper presents a general waveform control method that can mitigate such a low-frequency ripple current...
This paper presents a power control strategy for Hybrid Diesel Generator/ Fuel cell Marine Power System Combined with Energy Storage during voltage disturbance condition. For this purpose, dynamic modeling of hybrid power marine system including fuel cell power plant, supercapacitor, DC-DC converters and AC system connected inverter is constructed in the environment of Matlab software. To manage the...
The gap between supply and demand is never constant and is reflected as frequency deviation in power systems. Recent integration of renewable energy sources as distributed generators at the distribution level increase complexity in terms of control and stability. These distributed generators along with local load and storage constitute microgrids. Various control schemes and strategies with distributed...
The non-dispatchable energy output of PV generators has an adverse effect on the stability of microgrid especially capacity-limited microgrid with high PV penetration. To solve this problem, a unified power control strategy for PV generators is proposed to mimic the performance of synchronous generator (SG) in power system. As a supplementary supply, fuel cell is equipped in the PV generator to reduce...
A non linear passivity-based control can be suitably used to achieve stability of a Parallel Hybrid Fuel Cell/Supercapacitor (FC/SC) Power Source Architecture. Nevertheless, passivity properties are usually lost when such a controller is implemented in a sampled-data context and, as a consequence, stabilization objectives are degraded. This paper proposes a direct sampled-data control strategy based...
In this paper, a new power sharing control method for a microgrid with several distributed generation units is proposed. The presence of both inertial and non-inertial sources with different power ratings, maximum power point tracking, and various types of loads pose a great challenge for the power sharing and system stability. The conventional droop control method is modified to achieve the desired...
A novel voltage sag ride-through scheme for fuel cell (FC) distributed generator (DG) based power quality control center (PQCC) is proposed in this paper. Compared with the previous PQCC operational scenario, a series compensator (SC) which shares a same dc-link with the FC DG is integrated with the PQCC. Due to the fast and flexible power flow regulation capability of the PQCC-SC system, the sensitive...
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