Control of Distributed Generation Systems— Part I: Voltages and Currents Control

Marwali, M.N.; Keyhani, A.

doi:10.1109/tpel.2004.836685

Cited by 268 publications

(117 citation statements)

References 18 publications

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“…First is an external power control loop, second part of the control system is the droop control block which sets the magnitude and frequency (and hence phase) for the fundamental component of the inverter output voltage. The third part of the control system is the voltage and current controllers, which are designed to reject high frequency disturbances and provide sufficient damping for the output filter [9], [10]. …”

Section: B Controller Designmentioning

confidence: 99%

Power Dispatching of Active Generators Using Droop Control in Islanded Micro-Grid

Kumar¹

2017

IJRASET

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The Microgrid(MG) concept allows small distributed energy resources (DERs) to act in a coordinated manner to provide a necessary amount of active power and ancillary service when required. This paper presents control and power management of electronically interfaced Distributed Energy Resource (DER) units for microgrids. Voltage and frequency regulation in an islanded microgrid is one of the main control requirements. In this work, inverter control method for islanded operation of microgrid for the renewable resources has been studied. First task of the study was development of a Voltage Source Converter (VSC) system. Active and reactive power control systems for power dispatching have been implemented in the VSC and so that it can work as an active generator. The power dispatching policy of the active generator is based on combination of droop and PI control method. This paper presents results from a test microgrid system considering of a voltage sourced converter VSC interfacing with a DG under varying load conditions. The model has been simulated in MATLAB/Simulink and stable operations have been observed where micro-grid frequency, voltage and power quality were within acceptable ranges. Keywords-Active generators, Distributed generation (DG), Droop control, Micro-grid (MG), Voltage source converters (VSC) I.INTRODUCTION The Microgrid (MG) is a collection of distributed generators or micro resources, energy storage devices, and loads which operate as a single and independent controllable system capable of providing both power and heat to the area of service [1]. The micro resources that are incorporated in a Micro-Grid are comprised of small units, less than 100 kW, provided with power electronics (PE) interface. Most common resources are Solar Photovoltaic (PV), Fuel Cell (FC), or micro turbines connected at the distribution voltage level. In a Micro-Grid, the micro sources and storage devices are connected to the feeders through the micro source controllers (MCs) and the coordination among the micro sources is carried out by the central controller (CC) [2]. The Micro-Grid is connected to the medium voltage level utility grid at the point of common coupling (PCC) through the circuit breakers. When a Micro-Grid is connected to the grid, the operational control of voltage and frequency is done entirely by the grid; however, a MicroGrid still supplies the critical loads at PCC, thus, acting as a PQ bus. In islanded condition, a Micro-Grid has to operate on its own, independent of the grid, to control the voltage and frequency of the Micro-Grid and hence, acts like a PV (power-voltage) bus. The operation and management in both the modes is controlled and coordinated with the help of micro source controllers (MCs) at the local level and central controller (CCs) at the global level. DGs encompass a wide range of prime-mover technologies, such as internal combustion engines, gas turbines, wind power, micro turbines, photovoltaic (PV), fuel cells, etc. But controlling a potentially huge number of DGs crea...

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Section: B Controller Designmentioning

confidence: 99%

Power Dispatching of Active Generators Using Droop Control in Islanded Micro-Grid

Kumar¹

2017

IJRASET

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“…A countable number of researches have been done considering active load sharing condition [14][15][16][17][18][19][20][21][22] and droop control [23][24][25][26][27][28][29] or a combination of both [30][31][32]. Due to the advancement of digital signal processing techniques, some of these controlling methods have been applied to achieve voltage harmonics elimination and fast recovery performance on load transient in digital mode [31][32][33][34][35]. Transient response can also be improved by introducing proportional-integral-derivative (PID) terms [27], as shown in Fig.…”

Section: Parallel Operation Of Inverters In Dg or Microgridmentioning

confidence: 99%

Parallel operation of inverters and active power filters in distributed generation system—A review

Khadem¹,

Basu²,

Conlon³

2011

Renewable and Sustainable Energy Reviews

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a b s t r a c tIn this paper a technical review of parallel operation of power electronics inverters for load sharing conditions in distributed generation (DG) network is presented. Emphasis is given to parallel operation of Active Power Filters (APFs) as they are widely used to mitigate load current disturbances into DG networks. Discussions on recent advances in control strategies as applied to APFs are presented.

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“…The operation of this multilevel inverter is illustrated in [3] The literature shows several control techniques that have been presented and used to control the DGS. The most common control scheme called vector control, which depends on voltage orientation of the DGU with respect to the system voltage [4]. This scheme controls the active and reactive current/power through two decoupled control loops; each loop is provided with one or more PI controllers, but the main drawback of vector control is its susceptibility the system operating condition to the parameters of PI controllers [4].…”

Section: Introductionmentioning

confidence: 99%

“…The most common control scheme called vector control, which depends on voltage orientation of the DGU with respect to the system voltage [4]. This scheme controls the active and reactive current/power through two decoupled control loops; each loop is provided with one or more PI controllers, but the main drawback of vector control is its susceptibility the system operating condition to the parameters of PI controllers [4]. Adaptive total SMC is also utilized to control the current and voltage of standalone DG.…”

Section: Introductionmentioning

confidence: 99%

First Order Integral Sliding Mode Control for Active and Reactive Current of A Multilevel Inverter Based Distributed Generation Unit

Elnady¹

2017

REPQJ

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Abstract. This paper presents an innovative control scheme for Distributed Generation Systems, DGS, using an efficient version of the first order Sliding Mode Control, SMC. The control law of the SMC is modified in order to improve the tracking and reduce the chattering over the conventional SMC. The modification is focused on the definition of the sliding manifold, sliding surface, which contains an integral term of the error not a differential term like the conventional SMC. The proposed control scheme is applied to a multilevel diode clamped inverter based Distributed Generation Unit, DGU. The proposed control scheme is developed to control the active and reactive currents injected or absorbed by the power grid. Simulation results are provided to prove the viability of the proposed formulation and practicality of the presented sliding mode controller for the distributed generation system.

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Control of Distributed Generation Systems— Part I: Voltages and Currents Control

Cited by 268 publications

References 18 publications

Power Dispatching of Active Generators Using Droop Control in Islanded Micro-Grid

Power Dispatching of Active Generators Using Droop Control in Islanded Micro-Grid

Parallel operation of inverters and active power filters in distributed generation system—A review

First Order Integral Sliding Mode Control for Active and Reactive Current of A Multilevel Inverter Based Distributed Generation Unit

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