Departamento de Ingeniería Eléctrica, Electrónica, Automática y Comunicacioneshttp://hdl.handle.net/10578/692020-02-23T21:51:43Z2020-02-23T21:51:43ZA Discrete-Time Control Method for Fast Transient Voltage-Sag Compensation in DVRParreño Torres, AlfonsoRoncero-Sánchez, PedroVázquez del Real, JavierLópez Alcolea, Francisco JavierMolina-Martínez, Emilio J.http://hdl.handle.net/10578/227852019-12-14T03:19:10Z2019-12-01T00:00:00ZA Discrete-Time Control Method for Fast Transient Voltage-Sag Compensation in DVR
Parreño Torres, Alfonso; Roncero-Sánchez, Pedro; Vázquez del Real, Javier; López Alcolea, Francisco Javier; Molina-Martínez, Emilio J.
This paper presents a discrete-time domain control scheme for balanced voltage sag compensation
using a Dynamic Voltage Restorer (DVR), which is recognized to be an appropriate and economical
power electronic device with which to ameliorate these disturbances. The proposed control method is
implemented in the synchronous reference frame (SRF), with two nested regulators, one of which includes
an integral action. This algorithm has some advantages with respect to other control algorithms, such as
the fact that the proposed methodology permits all the closed-loop poles of the DVR system to be placed
in the desired locations in order to de ne the dynamical behavior with a reduction in the number of the
electrical magnitudes to be measured and without the need for state observers, as occurs in traditional control
methods. What is more, the well-known inner current loop implemented in other control schemes, which
is employed to attenuate the resonance of the plant, is unnecessary. Furthermore, the unbalanced voltage
sag compensation can be achieved by adding a ``plug-in'' controller and following the same methodology
presented for balanced voltage sags to design the controller. The good performance of the proposed control
scheme is validated by means of simulation and experimental results carried out with a 5 kW DVR laboratory
prototype. The discrete-time control method is also compared with two control schemes previously proposed
in literature.
2019-12-01T00:00:00ZControl and Restrictions of a Hybrid Renewable Energy System Connected to the Grid: A Battery and Supercapacitor Storage CaseArkhangelski, JuraPedro Roncer-SánchezAbdou-Tankari, MahamadouJavier Vázquez del RealGuilles Lefebvrehttp://hdl.handle.net/10578/226182019-11-19T02:19:55Z2019-07-19T00:00:00ZControl and Restrictions of a Hybrid Renewable Energy System Connected to the Grid: A Battery and Supercapacitor Storage Case
Arkhangelski, Jura; Pedro Roncer-Sánchez; Abdou-Tankari, Mahamadou; Javier Vázquez del Real; Guilles Lefebvre
This paper studies a Hybrid Renewable Energy System (HRES) as a reliable source of the power supply in the case of the connection to the grid. The grid connection imposes restrictions to the power delivered and harmonic content on the HRES. This causes the HRES to use multiple control systems and subsystems, as the normalization of the measurements, the current control, active harmonic compensation, synchronization, etc., described in this paper. Particular attention was paid to interactions in the storage system of the HRES. The durability of the HRES can be increased by the combination of the supercapacitors and batteries. This requires a power management solution for controlling the energy storage system. The aim of the supercapacitors is to absorb/inject the high-frequency fluctuations of the power and to smooth out the power of the batteries system of the HRES. This can be possible owing to the use of a low-pass second order filter, explained in this paper, which separates the high-frequency component of the storage system reference for the supercapacitor from the low-frequency component for the batteries system. This solution greatly increases the reliability and durability of the HRES.
2019-07-19T00:00:00ZControl and restrictions of a hybrid renewable energy system connected to the grid: a battery and supercapacitor storage caseARKHANGELSKI, JURAPedro Roncero-SánchezJavier Vázquez del RealLefèbvre, Gilleshttp://hdl.handle.net/10578/220592019-10-05T01:35:48Z2019-06-19T00:00:00ZControl and restrictions of a hybrid renewable energy system connected to the grid: a battery and supercapacitor storage case
ARKHANGELSKI, JURA; Pedro Roncero-Sánchez; Javier Vázquez del Real; Lefèbvre, Gilles
This paper studies a Hybrid Renewable Energy System (HRES) as a reliable source of the power supply in the case of the connection to the grid. The grid connection imposes restrictions to the power delivered and harmonic content on the HRES. This causes the HRES to use multiple control systems and subsystems, as the normalization of the measurements, the current control, active harmonic compensation, synchronization, etc., described in this paper. Particular attention was paid to interactions in the storage system of the HRES. The durability of the HRES can be increased by the combination of the supercapacitors and batteries. This requires a power management solution for controlling the energy storage system. The aim of the supercapacitors is to absorb/inject the
high-frequency fluctuations of the power and to smooth out the power of the batteries system of the HRES. This can be possible owing to the use of a low-pass second order filter, explained in this paper, which separates the high-frequency component of the storage system reference for the supercapacitor from the low-frequency component for the batteries system. This solution greatly increases the reliability and durability of the HRES.
2019-06-19T00:00:00ZFast Frequency Sweep Technique Based on Segmentation for the Acceleration of the Electromagnetic Analysis of Microwave DevicesMartinez, Juan AngelBelenguer, AngelEsteban, Héctorhttp://hdl.handle.net/10578/219592019-09-28T01:27:53Z2019-03-16T00:00:00ZFast Frequency Sweep Technique Based on Segmentation for the Acceleration of the Electromagnetic Analysis of Microwave Devices
Martinez, Juan Angel; Belenguer, Angel; Esteban, Héctor
The characterization of communication devices in a certain frequency band can be accelerated if a fast frequency sweep technique is used instead of a discrete frequency sweep. Existing fast frequency sweep techniques are either complex or specific for a certain electromagnetic solver. In this work, a new fast frequency sweep method is proposed that consists in segmenting the device under analysis into simple building blocks. Each building block is characterized with a generalized (multimode) circuital matrix whose elements present a simple and flat frequency response that is interpolated using natural cubic splines with very few points. In this way, the response of each block along the whole frequency band is obtained efficiently and accurately with as many frequency points as desired. Then, the circuital matrices of all the blocks are cascaded and the circuital matrix of the whole device in obtained. The new fast frequency sweep was successfully applied to the analysis of different types of devices (all metallic rectangular waveguide filter, dielectric loaded rectangular waveguide filter, and substrate integrated waveguide filter). The computational times were reduced to 15% or 19%, depending on the device, when compared with a discrete frequency sweep using the same electromagnetic solver.
2019-03-16T00:00:00Z