System performance improvement provided by a power conditioning subsystem for central station photovoltaic-fuel cell power plant

Tam, Kwa-Sur; Rahman, Saifur

doi:10.1109/60.4201

Cited by 28 publications

(10 citation statements)

References 10 publications

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“…Filter , are chosen to obtain an output voltage with THD below 5%. The battery voltage is chosen to be 225 V, half of the maximum dc link voltage C1 and close to the minimal requirement of 223 V according to (7). Those parameters are used for preliminary study only and are not yet optimized.…”

Section: Control Methodsmentioning

confidence: 99%

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Direct storage hybrid (DSH) inverter: A new concept of intelligent hybrid inverter

2017

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

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This paper proposes a new configuration of a singlephase hybrid inverter with an integrated battery energy storage, which is suitable for residential households to maximize local consumption of solar energy and thus reduce dependency on grid support. The hybrid inverter is called Direct Storage Hybrid (DSH) Inverter. A transformer-less topology such as HERIC, operating at low frequency to generate a three-level rectangular output voltage, is adopted to connect a photovoltaic (PV) panel to the load and/or the grid. A series active filter is employed to compensate the high harmonic components from the rectangular voltage and provide a sinusoidal voltage. A bidirectional dc/dc converter connects the battery to the PV panel to control the battery state of charge (SoC) and optimize the PV panel operation during both off-grid and grid-connected modes. The DSH inverter can let the battery bypass the dc/dc converter and connect directly to the inverter stage, leading to a significant improvement in throughput efficiency in battery utilization. This paper discusses the operation and loss analysis of the DSH inverter in off-grid mode.

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Section: Control Methodsmentioning

confidence: 99%

“…The first system consists of a PV inverter and a separated battery inverter operating in parallel. They are connected to an ac bus via a multi-winding transformer [7], [8] or transformer-less topologies [9]. The battery inverter stores the energy via the ac bus [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Direct storage hybrid (DSH) inverter: A new concept of intelligent hybrid inverter

2017

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

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“…Not much literature is available on HDGS. Tam and Rahman [8] have proposed an elegant HDGS scheme on the basis of PV and FC energy. The two energy sources are connected to a grid through two power inverters and a single multiwinding transformer.…”

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confidence: 99%

Utility-Interactive Hybrid Distributed Generation Scheme With Compensation Feature

Reddy

Agarwal

2007

IEEE Trans. On Energy Conversion

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A new, utility-interactive hybrid distributed generation scheme, with reactive power compensation feature, is presented. The basic objective is to realize a reliable power supply for a remotely located critical load. Fuel cell (FC) stack and photovoltaic (PV) array are considered as energy sources. These sources can be operated independently or in conjunction as per the requirement. The control logic employed ensures maximum utilization of the PV array, resulting in optimum operational costs. Only one inverter is used to connect both the FC stack and the PV array to the utility. Apart from feeding active power into the grid, the system can also provide reactive power compensation. Active and reactive power can be independently controlled by controlling the inverter's power angle and modulation index, respectively. This provides more flexibility in control and operation. All the details of this work, including power and control circuits, MATLAB simulation results, and experimental results, are presented. Index Terms-Compensation, fuel cells (FCs), photovoltaic (PV) cells, reactive power. I. INTRODUCTION T HE demand for energy is increasing rapidly with increasing population and industrialization. Initially, centralized power generation was promoted because transportation of fuels is more difficult than transmition of the generated power. However, for relatively small loads, which are quite far from these stations, this approach suffers from the following drawbacks: 1) distribution lines incur significant losses; 2) poor voltage regulation and low power quality; 3) low reliability. Further, centralized power stations run on fossil fuels, which are not renewable. Therefore, the use of nonconventional energy sources, which are both renewable and eco-friendly, is desirable. The above-mentioned drawbacks and constraints can be handled by generating the power "locally" from sources like photovoltaic (PV) arrays, fuel cell (FC) stacks, wind energy, small hydro, etc. This concept of generating the power locally is known as distributed generation (DG) [1] and its advantages include low distribution losses, better power quality, and high reliability [2]. A DG system works particularly well if the energy sources are small in capacity and distinct in nature. When, different types of energy sources are integrated into a DG system, it is called a hybrid distributed generation system (HDGS). In a DG system,

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“…The feasibility of using DG for power conditioning, power factor compensation, real and reactive power control, and mitigation of other power-quality (PQ) problems have been discussed in the literature [1]- [5]. Tam and Rahman have proposed an interface of DG with the utility to compensate reactive power [1]. A scheme to reduce PQ problems, besides reactive power compensation, has been presented by Marei [2].…”

mentioning

confidence: 99%

“…With the increased deployment of distributed resources (DR) into the grid, it is desirable and advantageous to tap additional benefits out of these resources besides their main function of active power generation. The feasibility of using DG for power conditioning, power factor compensation, real and reactive power control, and mitigation of other power-quality (PQ) problems have been discussed in the literature [1]- [5]. Tam and Rahman have proposed an interface of DG with the utility to compensate reactive power [1].…”

mentioning

confidence: 99%

Control of a Stand-Alone Inverter-Based Distributed Generation Source for Voltage Regulation and Harmonic Compensation

Patel

Agarwal

2008

IEEE Trans. Power Delivery

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Abstract-Operation of a distributed-generation (DG) source, producing sinusoidal output voltage and supplying nonlinear loads is characterized by a nonsinusoidal voltage at the point of common coupling (PCC). The situation gets particularly aggravated during the islanding mode, when the grid power is not available. This deteriorates the performance of other loads connected in parallel. A scheme based on nonsinusoidal pulsewidth-modulated control of a stand-alone inverter-based DG source is proposed to regulate and produce a sinusoidal voltage at the PCC. It is demonstrated that without any current sensor or compensating device, the individual harmonic components and THD of the supply voltage at the PCC can be reduced to the desired level. Simulations have been performed to study the viability of the proposed scheme and all of the results are presented.

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System performance improvement provided by a power conditioning subsystem for central station photovoltaic-fuel cell power plant

Cited by 28 publications

References 10 publications

Direct storage hybrid (DSH) inverter: A new concept of intelligent hybrid inverter

Direct storage hybrid (DSH) inverter: A new concept of intelligent hybrid inverter

Utility-Interactive Hybrid Distributed Generation Scheme With Compensation Feature

Control of a Stand-Alone Inverter-Based Distributed Generation Source for Voltage Regulation and Harmonic Compensation

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