Voltage Control Method Using Distributed Generators Based on a Multi-Agent System

Kang, Hyun-Koo; Chung, Ilyong; Moon, Seung-Il

doi:10.3390/en81212411

Cited by 10 publications

(7 citation statements)

References 31 publications

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“…A MAS can be defined as a system comprising multiple intelligent agents that have the abilities of autonomous decision-making and communication with other agents [9,10]. In [11,12], the authors suggested an agent-based algorithm to control the reactive power output of distributed energy resources (DERs) for proper voltage regulation with a few communication requirements. However, they did not consider the coordination between OLTC and DERs.…”

Section: Introductionmentioning

confidence: 99%

A Novel Voltage Control Scheme for Low-Voltage DC Distribution Systems Using Multi-Agent Systems

et al. 2017

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Low-voltage direct current (LVDC) distribution systems have been evolving into interesting ways of integrating distributed energy resources (DERs) and power electronics loads to local distribution networks. In LVDC distribution systems, voltage regulation is one of the most important issues, whereas AC systems have concerns such as frequency, power factor, reactive power, harmonic distortion and so on. This paper focuses on a voltage control method for a LVDC distribution system based on the concept of multi-agent system (MAS), which can deploy intelligence and decision-making abilities to local areas. This paper proposes a distributed power flow analysis method using local information refined by local agents and communication between agents based on MAS. This paper also proposes a voltage control method by coordinating the main AC/DC converter and multiple DERs. By using the proposed method, we can effectively maintain the line voltages in a pre-defined normal range. The performance of the proposed voltage control method is evaluated by case studies and compared to conventional methods.

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Section: Introductionmentioning

confidence: 99%

A Novel Voltage Control Scheme for Low-Voltage DC Distribution Systems Using Multi-Agent Systems

et al. 2017

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“…Self-healing plays an important role in distribution network [2][3][4][5][6][7][8]. The systems, which have been effectively grounding, protect themselves by switching breakers when grounding faults occur.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Line-to-Ground Capacitance in Distribution Network Considering Magnetizing Impedance’s Frequency Characteristic

et al. 2017

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Abstract:Signal injection method (SIM) is widely applied to the insulation parameters' measurement in distribution network for its convenience and safety. It can be divided into two kinds of patterns: injecting a specific frequency signal or several frequencies' groups, and scanning frequency in a scheduled frequency scope. In order to avoid the disadvantages in related researches, improved signal injection method (ISIM), in which the frequency characteristic of the transformer magnetizing impedance is taken into consideration, is proposed. In addition, optimization for signal injection position has been accomplished, and the corresponding three calculation methods of line-to-ground capacitance has been derived. Calculations are carried out through the vector information (vector calculation method), the amplitude information (amplitude calculation method), the phase information (phase calculation method) of voltage and current in signal injecting port, respectively. The line-to-ground capacitance is represented by lumped parameter capacitances in high-voltage simulation test. Eight different sinusoidal signals are injected into zero-sequence circuit, and then line-to-ground capacitance is calculated with the above-mentioned vector calculation method based on the voltage and the current data of the injecting port. The results obtained by the vector calculation method show that ISIM has a wider application frequency range compared with signal injection method with rated parameters (RSIM) and SIM. The RSIM is calculated with the rated transformer parameters of magnetizing impedance, and the SIM based on the ideal transformer model, and the relative errors of calculation results of ISIM are smaller than that for other methods in general. The six groups of two-frequency set are chosen in a specific scope which is recommended by vector calculation results. Based on ISIM, the line-to-ground capacitance calculations through the amplitude calculation method and phase calculation method are compared, and then its application frequency range, which can work as a guidance for line-to-ground capacitance measurement, is concluded.

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“…Power system stability; (2) Power system reliability; (3) Flexible alternating current transmission systems (FACTS) applied to power systems; (4) Application of optimization methods to power systems; (5) Architectures and models of smart grids; (6) Power market; (7) Control, operation, and planning of distributed generation resources; (8) Smart home with energy management systems; (9) Microgrids and active distribution networks; (10) Virtual power plants and demand response.…”

mentioning

confidence: 99%

“…The transmission system category covers high-voltage direct current (HVDC), FACTS, and thermal standards [5,8,12,21]. The distribution system category covers many topics, such as voltage control, network reconfiguration, microgrids, power quality, smart distribution, and multi-agents [6,10,11,14,20,22]. The end-users category covers demand response, frequency control, and critical peak pricing [7,15,18,19].…”

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confidence: 99%

Electric Power Systems Research

Hong

2016

Energies

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This book contains articles [1-22] that were accepted for publication in a Special Issue of Energies on the subject of "Electric Power Systems Research". Customers request electric utilities to deliver electric power in a stable, reliable, secure, and sustainable manner from a generation system through transmission and distribution systems to end-users. Consequently, the need to develop advanced technologies and novel methods applied to the modern power system is essential. Recently, the concept of smart grids that incorporate renewable generation, power electronics-based facilities, and information/communication technologies has been receiving increasing attention. "Electric Power Systems Research" is a special issue of Energies for the publication of original papers about the generation, transmission, distribution, and utilization of electrical energy. This special issue presents important results of work on power systems. Papers can present applied research, the development of new procedures or components, an original application of existing knowledge, or new design approaches. Authors were invited to submit papers on "Electric Power Systems Research", including, but not limited to, the following areas:

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Voltage Control Method Using Distributed Generators Based on a Multi-Agent System

Cited by 10 publications

References 31 publications

A Novel Voltage Control Scheme for Low-Voltage DC Distribution Systems Using Multi-Agent Systems

A Novel Voltage Control Scheme for Low-Voltage DC Distribution Systems Using Multi-Agent Systems

Measurement of Line-to-Ground Capacitance in Distribution Network Considering Magnetizing Impedance’s Frequency Characteristic

Electric Power Systems Research

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