Output filter design for a grid-interconnected three-phase inverter

Wang, T.C.Y.; Ye, Zhihong; Sinha, Gautam; Yuan, Xiaoming

doi:10.1109/pesc.2003.1218154

Cited by 280 publications

(163 citation statements)

References 11 publications

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“…The dynamic control of inverter with LCL-filter is more complicated than L-filter. As the additional two poles and zeroes in LCL-filter can lead to instability in control system, active or passive damping method is usually implemented to mitigate this issue [7]- [10]. The control scheme for three phase grid-connected PV system shown in Fig.…”

Section: Interconnecting Mega-solar To a Grid With Dedicated Contmentioning

confidence: 99%

Decomposition of Mega-Solar for Interconnecting to a Weak Power System

Mohammadirad¹,

Nagsaka²

2017

IJESD

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Abstract-This paper represent interconnection of 16 Megawatt [MW]Mega-Solar with a dedicated control system to a grid. The Photovoltaic (PV) are connected to DC/DC buck-boost converter with Perturb and Observe (P&O) Maximum Power Point Tracking(MPPT) controller. For controlling the DC/AC inverter, reference controller (abc-controller) and hysteresis current control are used. When amount of the connected Mega-Solar increased, as a result of the simulation, it become obvious that the reactive power of main grid (weak power system) is consumed and the voltages rise at the connected bus. In this study, first we controlled the voltage and current with dedicated control system and get maximum power from Mega-Solar. Second, we interconnect our Mega-Solar site to IEEE 30 Bus Test System (Weak power system) as main grid and by decomposition control strategy solved the problem of reactive power shortage. In this paper, all simulation designed in MATLAB/SIMULINK. For simulation of an actual power system, for the first time, a simulation model of the IEEE 30 Bus Test System on the MATLAB/SIMULINK environment its developed and its effectiveness is verified through various simulation results.Index Terms-Mega-solar, interconnection, weak power system, decomposition. I. INTRODUCTIONSince July 2012, the Japanese electric power companies agreed to purchase a huge amount of renewable energies such as solar, wind, geothermal, etc. to fulfill the lack of generation supplied by stopped nuclear power plants due to Great East Japan Earthquake and Tsunami occurred on March 11 th , 2011. The purchasing power from RE (renewable energy) has already started. However there are many issues and risks accompanied with such decision, however none of them really considered seriously because of rush replacement of nuclear power with attention energies.One of the renewable energy that Japanese companies consider on it seriously is Mega-Solar generation, which includes reality and problems. About reality of Mega-solar is before April 2013 the price which Japanese companies started to pay for 1 [kW] of total renewable energy was 42 yen and currently the price for 1 [kW] is 38 yen and they decided to pay for 1 [kW] 27 yen in future. It is quite natural that many companies rush to participate in the Mega-solar business also current purchase of RE in Japan is 2 times higher than Germany. Since Jan 2013, 1,024 Mega-solar plants is planned total capacity of Mega-solar will be 5.750 [GW]. This amount of capacity is equal to 6 nuclear power generation plants with total investment about 1,500 billion yen excluding land price. For this reason, many electronic and investment companies interests on Mega-Solar business. One of the problem of interconnection was stated that some Japanese electric companies have declared that many investors and contractors are rushing to contract selling their renewable energy power to the utilities. However, they can only purchase ¼ of the electricity from Mega-Solar because interconnection limitation. As a result, when huge a...

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Section: Interconnecting Mega-solar To a Grid With Dedicated Contmentioning

confidence: 99%

Decomposition of Mega-Solar for Interconnecting to a Weak Power System

Mohammadirad¹,

Nagsaka²

2017

IJESD

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“…However, a serious challenge faced by the LCL filter is its resonance problem, which may make the whole system unstable and degrade the output performance of the VSC [16], [17]. Fortunately, this LCL filter resonance problem can be solved with different damping methods, which can be classified as passive damping [18]- [20] and active damping [13], [21]- [26].…”

Section: Introductionmentioning

confidence: 99%

Application of a C-Type Filter Based LCFL Output Filter to Shunt Active Power Filters

Liu¹,

Dai²,

Duan³

et al. 2013

Journal of Power Electronics

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This paper proposes and designs a new output filter called an LCFL filter for application to three phase three wire shunt active power filters (SAPF). This LCFL filter is derived from a traditional LCL filter by replacing its capacitor with a C-type filter, and then constructing an L-C-type Filter-L (LCFL) topology. The LCFL filter can provide better switching ripple attenuation capability than traditional passive damped LCL filters. The LC branch series resonant frequency of the LCFL filter is set at the switching frequency, which can bypass most of the switching harmonic current generated by a SAPF converter. As a result, the power losses in the damping resistor of the LCFL filter can be reduced when compared to traditional passive damped LCL filters. The principle and parameter design of the LCFL filter are presented in this paper, as well as a comparison to traditional passive damped LCL filters. Simulation and experimental results are presented to validate the theoretical analyses and effectiveness of the LCFL filter.

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“…Já o amortecimento ativo consiste na introdução de um compensador digital no controle da malha de corrente. As perdas resultantes do amortecimento passivo são indesejadas em sistemas de geração eólicas de alta potência, sendo assim o amortecimento ativo é o mais indicado nestas aplicações (Gabe, 2008;Wang et al, 2003). Entretanto, o amortecimento ativo geralmente é projetado para uma condição específica de rede (fraca ou forte).…”

Section: Introductionunclassified

Projeto e implementação de um controlador de corrente robusto para inversores com filtro LCL conectados à rede com incertezas paramétricas

Gabe

Massing

Montagner

et al. 2009

Sba Controle & Automação

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This paper addresses the design and implementation of a discrete controller for grid connected voltage source inverters with LCL-filter usually found in wind power generation systems. First a theorem that relates the controllability of the discrete dynamic equation of the inverter with LCL-filter and the sampling frequency is derived. Then, a condition to obtain a robust partial state feedback controller based on linear matrix inequalities is proposed. This controller guarantees the stability and damping of the LCL-filter resonance for a large set of grid conditions without requiring self-tuning procedures. Finally, an internal model controller is added to ensure asymptotic reference tracking and disturbance rejection, therefore reducing significantly the impact of grid background voltage distortion on the output currents. Simulation and experimental results are presented to support the theoretical analysis and to demonstrate the system performance. RESUMOEste artigo trata do projeto e implementação de um controlador discreto de corrente para um inversor trifásico alimentado em tensão e conectado à rede através de um filtro LCL, geralmente encontrado em sistemas de geração eólica. Primeiramente, é desenvolvido um teorema que relaciona a controlabilidade da equação dinâmica discreta, que representa o comportamento do conversor conectado à rede, aos parâmetros do filtro e a freqüência de amostragem do sistema. Então é derivada uma condição para a obtenção dos ganhos de retroação parcial robusta de estados baseada em desigualdades matriciais lineares. Este controlador garante a estabilidade e o amortecimento ativo da ressonância do filtro LCL conectado à rede, mesmo com incertezas paramétricas no ponto de conexão sem a necessidade de procedimentos de auto-sintonia ou algoritmos adaptativos. Finalmente, um controlador com modelo interno é adicionado a fim de prover rastreamento assimptótico da referência e rejeição do distúrbio, diminuindo significativamente o impacto dos distúrbios harmônicos de baixa freqüência da tensão da rede nas correntes de saída. Resultados experimentais e de simulação são apresentados para dar suporte a análise teórica desenvolvida bem como para demonstrar o desempenho do sistema.

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Output filter design for a grid-interconnected three-phase inverter

Cited by 280 publications

References 11 publications

Decomposition of Mega-Solar for Interconnecting to a Weak Power System

Decomposition of Mega-Solar for Interconnecting to a Weak Power System

Application of a C-Type Filter Based LCFL Output Filter to Shunt Active Power Filters

Projeto e implementação de um controlador de corrente robusto para inversores com filtro LCL conectados à rede com incertezas paramétricas

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