Development of detailed and averaged models of large-scale PV power generation systems for electromagnetic transient simulations under grid faults

Yonezawa, Rikido; Noda, Taku; Fukushima, Kentaro; Nakajima, T.; Sekiba, Y.; Utsunomiya, Koji; Ito, Eiichi; Misawa, Kazuhiro; Chida, Takuji; Yamaguchi, Nobuharu; Takeuchi, Yoshihito

doi:10.1109/isgt-asia.2016.7796368

“…The VAve model [7][8][9][10][11][12] has been developed to allow for the EMT simulation of inverters with a large time step. The inverter F I G U R E 3 Configuration of the VAve model is modeled by voltage sources that output reference voltages, and connected to the AC system without simulating switching operations and PWM.…”

Section: Vave Modelmentioning

confidence: 99%

“…Then it was also applied to power system analyses, and a number of average-value models for voltage source inverters were developed. [7][8][9][10][11] The method was further extended to simulate the inverter's gate-block operation 12 ; that method can deal with both operation and stop conditions. In this paper, we refer to that model as the voltage average-value model (VAve model).…”

Section: Introductionmentioning

confidence: 99%

An Electromagnetic Transient Simulation Model of Grid-connected Inverters for Dynamic Voltage Analysis of Distribution Systems

Sano

¹

,

Yonezawa

²

,

Noda

³

2018

Self Cite

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Transient analysis is an indispensable tool for analyzing the voltage fluctuation of distribution systems according to the penetration of distributed generations with gridconnected inverters. Electromagnetic transient (EMT) analysis is suitable for the purpose because it enables detailed modeling of the inverters and accurate simulation of their dynamic behavior. However, the EMT analysis requires a smaller calculation time step by a factor of 500 if the simulated power system includes the inverters. Simulation of the inverters is a bottleneck in speeding up the EMT analysis. This paper proposes a novel average-value modeling method for the grid-connected inverters. The proposed inverter model operates in a larger calculation time step, and speeds up the EMT analysis of distribution systems containing the inverters. The maximum error in the output power was 8% compared to the result by the conventional model. Dynamic voltage simulations are demonstrated with a test case, which includes tap changing transformers with a voltage controller and a photovoltaic generation facility. The proposed model reduces the required calculation time by a factor of 754 compared to the conventional model whereas there is no significant difference in the simulated result. K E Y W O R D S average-value model, distribution system, dynamic voltage simulation, electromagnetic transient analysis, grid-connected inverter Electr Eng Jpn. 2019;206:11-21. wileyonlinelibrary.com/journal/eej

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“…The SW model simulates the switching operations of each power semiconductor switch, which consists of the converter. Here we adopt the SW model of a neutral‐point clamped three‐level inverter . Some of the control and circuit parameters were modified for this study.…”

Section: Existing Inverter Models For Emt Analysismentioning

confidence: 99%

“…The VAve model has been developed to allow for the EMT simulation of inverters with a large time step. The inverter is modeled by voltage sources that output reference voltages, and connected to the AC system without simulating switching operations and PWM.…”

Section: Existing Inverter Models For Emt Analysismentioning

confidence: 99%

“…The averaging method (a method in which voltages and currents are dealt with their averaged value over one switching period) was originally employed in analyses and control system designs of power electronics circuits. Then it was also applied to power system analyses, and a number of average‐value models for voltage source inverters were developed . The method was further extended to simulate the inverter's gate‐block operation; that method can deal with both operation and stop conditions.…”

Section: Introductionmentioning

confidence: 99%

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An electromagnetic transient simulation model of grid‐connected inverters for dynamic voltage analysis of distribution systems

Sano

¹

,

Yonezawa

²

,

Noda

³

2019

Electrical Engineering Japan

Self Cite

View full text Add to dashboard Cite

Transient analysis is an indispensable tool for analyzing the voltage fluctuation of distribution systems according to the penetration of distributed generations with gridconnected inverters. Electromagnetic transient (EMT) analysis is suitable for the purpose because it enables detailed modeling of the inverters and accurate simulation of their dynamic behavior. However, the EMT analysis requires a smaller calculation time step by a factor of 500 if the simulated power system includes the inverters. Simulation of the inverters is a bottleneck in speeding up the EMT analysis. This paper proposes a novel average-value modeling method for the grid-connected inverters. The proposed inverter model operates in a larger calculation time step, and speeds up the EMT analysis of distribution systems containing the inverters. The maximum error in the output power was 8% compared to the result by the conventional model. Dynamic voltage simulations are demonstrated with a test case, which includes tap changing transformers with a voltage controller and a photovoltaic generation facility. The proposed model reduces the required calculation time by a factor of 754 compared to the conventional model whereas there is no significant difference in the simulated result. K E Y W O R D S average-value model, distribution system, dynamic voltage simulation, electromagnetic transient analysis, grid-connected inverter Electr Eng Jpn. 2019;206:11-21. wileyonlinelibrary.com/journal/eej

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Development of Electromagnetic Transient Simulation Models for Power Quality Analysis of Distribution Systems

Nagashima

¹

,

Fukushima

²

,

Noda

³

2018

Electrical Engineering Japan

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SUMMARY Due to the rapid spread of renewable energy power sources in recent years, voltage rise problems in distribution systems caused by reverse power flow from these renewable energy power sources especially from photovoltaic (PV) power generation systems are of great concern. To cope with this kind of problems, conventional voltage regulation devices such as load‐ratio transformers in the substation and step voltage regulators (SVRs) on the distribution line are basically used. If their voltage regulation capability is not sufficient, the power conditioning systems of PV power generation systems may be modified so as to supply reactive power and a static synchronous compensator (STATCOM) may be applied to the distribution system. Therefore, the coordination of these conventional and new voltage regulation devices is necessary for the design of smarter distribution systems, and electromagnetic transient (EMT) simulations of distribution systems with these devices have to be carried out to assess power quality. To this end, the authors have developed EMT simulation models of distribution substations, SVRs and distribution STATCOMs, and they are routinely used for power quality assessment studies. This paper presents these simulation models and a simulation example.

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Development of detailed and averaged models of large-scale PV power generation systems for electromagnetic transient simulations under grid faults

Cited by 9 publications

References 10 publications

An Electromagnetic Transient Simulation Model of Grid-connected Inverters for Dynamic Voltage Analysis of Distribution Systems

An Electromagnetic Transient Simulation Model of Grid-connected Inverters for Dynamic Voltage Analysis of Distribution Systems

An electromagnetic transient simulation model of grid‐connected inverters for dynamic voltage analysis of distribution systems

Development of Electromagnetic Transient Simulation Models for Power Quality Analysis of Distribution Systems

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