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The Light Emitting Diode (LED) based lighting technology is the latest technological innovation in the lighting industry, and it is still evolving to make it more reliable, compatible and sustainable solution. The heart of the LED lighting technology is the driver circuit, and the current driver topologies are creating significant power quality issues. This paper presents a new approach to design...
With the advancements in power electronics technologies and the momentum towards intelligent electrical energy management, there is an increasing demand for power grids to have additional functions. Solid-state transformer (SST) is a new type of power converter that is employed in microgrids to achieve miniaturisation and promising performance. It comprises an isolated DC-DC converter with planar...
A novel buck-boost dc-dc converter with high voltage step-up and step-down ability has been introduced in this paper. There are two switches in this converter, of which the sources are connected together and also connected to the ground of the input voltage source. Hence, there is no need for floating gate driver. In addition, the voltage stress of one of the switches is lower than the existing quadratic...
This paper presents a real time hotspot detection using scan-method adopted with a widely applied maximum power point tracking (MPPT) technique perturbation and observation (P&O) method about photovoltaic (PV) solar panel I-V characteristic to implement a PV generation system. The hotspot detection is based on the periodic inspection of the I-V curve of the PV panel in real time. The I-V tracking...
Boost converters are widely used in several applications such as solar PV systems, energy storage systems, etc. In order to improve its dynamic performance, several model predictive control (MPC) strategies have been proposed to govern this DC-DC converter. However, in general, they require long prediction horizons to achieve a stable closed-loop due to its well-known non-minimum phase behavior. A...
Applications of the multi-input converters are becoming popular due to their conformity to renewable energy systems. This paper proposes a new topology of double-input boost converters with continuous input current, which is intended to be used for renewable power sources. The topology is derived from two dc-dc converter configurations: boost dc-dc converter and Y-source dc-dc converter. In the proposed...
DC microgrids are gaining popularity as there is an increase in the usage of dc loads and rise in the penetration of renewable energy sources (RES). Furthermore, bipolarity in the dc microgrid is introduced to enhance the reliability and efficiency of the system. However, bipolar dc grids are prone to voltage unbalance across the both the poles of the dc grid due to unequal load distribution. In this...
In this work, output voltage tracking problem of non-minimum phase (NMP) boost type dc-dc converter in continuous conduction mode (CCM) is studied under the internal model control (IMC) framework. If it is desired to implement large set-point changes, then the manipulated inputs can get saturated during the transients and the closed-loop performance can deteriorate if no provision is made for anti-reset...
This paper proposes a new design procedure for a bidirectional LCL DC-DC converter. This converter employs two DC/AC insulated-gate bipolar transistor-based (IGBT) converters and a passive LCL filter instead of a typical high frequency transformer. The presented LCL filter design is based on zero reactive power. Higher step ratio is achieved by utilizing post-resonant mode of operation. The proposed...
A bidirectional DC-DC converter with high step-down and step-up voltage conversion ratio is proposed in this paper. Two capacitors series in the high-voltage side of proposed converter are used for voltage division. The divided voltages are then discharged to and charged from the low-voltage side by a modified two-phase interleaved buck-boost converter, respectively. Due to stacking architecture of...
This paper proposes a new design method to minimize the cause of parasitic oscillation in zero-current-switching (ZCS) DC-DC converter. The parasitic capacitance in switche is considered in circuit operation, a design of the ZCS DC-DC converter is optimized by proposed design method. With some prerequisites and assumptions, the waveform equations of the parasitic oscillations are analytically derived...
Multilevel cascaded converters for use in battery energy storage systems (BESSs) can utilise parallel-connected dc/dc conversion stages. These stages decouple each battery string voltage from the associated H-bridge capacitor voltage. Decoupling prevents second harmonic current ripple flowing in the batteries and compensates for variation in battery voltage due to state of charge. Instead of parallel-connected...
Switched reluctance machines receive increased attention by the automotive industry because of their cost efficiency. However, the comparatively larger inverter is a disadvantage of this machine type. This paper evaluates the effects of the usage of a dc-dc converter to reduce the size of the dc-link capacitor by active filtering of the source current. The active filter is compared to a passive filter...
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