A novel communication strategy for decentralized control of paralleled multi-inverter systems

Cheng, Yeong Jia; Sng, E.K.K.

doi:10.1109/tpel.2005.861194

Cited by 75 publications

(3 citation statements)

References 14 publications

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“…At the same time, there are generally multiple converters in the parallel system, which requires more signal lines and is difficult to apply to long-distance transmission systems. In [10], a new communication strategy for decentralized control of paralleled multi-inverter systems was introduced, and the strategy had a good performance in removing frequency. In [11,12] the authors studied the parallel strategy of master-slave control.…”

Section: Introductionmentioning

confidence: 99%

Parallel Control of Converters with Energy Storage Equipment in a Microgrid

Zhao

Yang

2019

Electronics

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The converter in a microgrid uses the active power and reactive power (PQ) control strategy when connected to the grid. In the case of failure of large power grid, the converters are required to be connected in parallel under the condition of island to provide power to the load. In this paper, a new control method for the parallel operation of converters based on V/F control is proposed. The V/F control is used to ensure the output voltages have the same amplitude and frequency, then the converters will only produce circulating current caused by phase angle inconsistency. The phase angle self-synchronization strategy is proposed to make sure the phase angle of output voltage of all converters in the system are consistent. First, a large inductor is added to the end of the converter to ignore the line reactance, through this, the measured voltage at the terminal of the converter roughly equals to the voltage of the load, thus, every converter has the same reference of phase angle. Using the proposed phase angle self-synchronization strategy allows the output voltage of every converter to have the same phase angle, so that there is no circulating current between converters, and the power is evenly distributed among the converters. The simulation verification was carried out on the Power Simulation (PSIM) simulation platform, and the experimental verification was implemented on the hardware experimental platform. Both results demonstrate the effectiveness of the proposed strategy. This method is highly reliable and easy to implement, and the circulating current can be reduced effectively.

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Section: Introductionmentioning

confidence: 99%

Parallel Control of Converters with Energy Storage Equipment in a Microgrid

Zhao

Yang

2019

Electronics

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“…Large-scale Distributed Generation (DG) and Distributed Energy Resources (DER) have raised new challenges that must be dealt with including fault tolerance, security, stability, and bi-directional communications (Lee, 2011). In Active Distribution Networks (ADN), Power distribution should be active and no longer passive (Cheng, 2006). Two-way communication should take place between the sources and low voltage consumers using power line communication (PLC).…”

Section: Introductionmentioning

confidence: 99%

Demand-Driven Algorithm for Sharing and Distribution of Photovoltaic Power in a Small Local Area Grid

Abu-Arqoub

Issa

Shubita

et al. 2014

International Journal of Information Technology and Web Engineering

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The objective of installing a residential photovoltaic system is to cut the cost of the monthly electric bill. However, many homeowners, especially those with low-income, finds it difficult to invest in such systems because require substantial upfront investment. This paper presents a project called PSD-LAG("Sharing and Distribution of Power-Local Area Grid") which attempts to solve the issue of installation cost relying on the concept of power sharing and distribution. Thus two or more neighboring households can share the cost of installation, and accordingly share the generated electric power. A Demand-Driven algorithm is implemented and is embedded in a micro-processor based control unit, called "Intelligent Power Distribution and Control Unit (IPDC Unit)", over sees the operation of the PSD-LAG system. It reads the status of generated power, power requirements for each home, power quota for each home, and accordingly controls a set of hardware devices to distribute the power in a most efficient manner based on usage and quota. At the core of the PSD-LAG is an Intelligent Power Distribution and Control Unit (IPDC Unit) that provides instantaneous monitoring, protection and control. It is an embedded Operating System that reads the status of generated power, power requirements for each home, power quota for each home, and accordingly controls a set of hardware devices to distribute the power in a most efficient manner based on usage and quota.

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“…Thus, the parallel UPS system operation is the most effective solution to provide continuous power to load, enhance system stability, lower the maintenance cost, and increase system capacity. It is for these reasons that many control schemes have been proposed for parallel operations of the inverter in the literature, such as, centralized control [3], master-slave control [4], average load sharing [5], etc. However, the above-mentioned control schemes require an intercommunication network between the inverters for coordination.…”

mentioning

confidence: 99%

Finite Control Set Model Predictive Control for Parallel Connected Online UPS System under Unbalanced and Nonlinear Loads

et al. 2019

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In this paper, the finite control set model predictive control (FCS–MPC) technique-based controller is proposed for the inverter of the uninterrupted power supply (UPS) system. The proposed controller uses the mathematical model of the system to forecast the response of voltage for each possible switching state for every sampling instant. Following this, the cost function was used to determine the switching state, applied to the next sampling instant. First, the proposed control strategy was implemented for the single inverter of the UPS system. Finally, the droop control strategy was implemented for parallel inverters to guarantee actual power sharing among a multiple-parallel UPS system. To validate the performance of the proposed controller under steady-state conditions and dynamic-transient conditions, extensive simulations were conducted using MATLAB/Simulink. The proposed work shows a low computational burden, good steady state performance, fast transient response, and robust results against parameter disturbances as compared to linear control. The simulation results showed that total harmonic distortion (THD) for the linear load was 0.9% and THD for the nonlinear load was 1.42%.

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A novel communication strategy for decentralized control of paralleled multi-inverter systems

Cited by 75 publications

References 14 publications

Parallel Control of Converters with Energy Storage Equipment in a Microgrid

Parallel Control of Converters with Energy Storage Equipment in a Microgrid

Demand-Driven Algorithm for Sharing and Distribution of Photovoltaic Power in a Small Local Area Grid

Finite Control Set Model Predictive Control for Parallel Connected Online UPS System under Unbalanced and Nonlinear Loads

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