Impacts of Distributed Generation on Electric Grid and Selecting of Isolation Transformer

Zhang, W.Y.; Zhu, Shouzhen; Zheng, Jiqiang; Zhang, H.

doi:10.1109/tdc.2005.1546852

Cited by 7 publications

(7 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Distributed generators are coupled to the grid by a transformer [17]. The coupling transformer can adjust voltage levels, block dc current injection to the system, eliminate third harmonics, mitigate surges, ease detection of overcurrent fed from the system, and provide galvanic isolation [18]. When a DG unit is disconnected from the utility grid, highly nonlinear magnetizing inductance of potential transformers 0840-8688 © 2015 IEEE.…”

Section: Ferroresonance After Islanding Of Synchronousmentioning

confidence: 99%

Ferroresonance After Islanding of Synchronous Machine-Based Distributed Generation

Esmaeili

Rostami²,

Gharehpetian

et al. 2015

Can. J. Electr. Comput. Eng.

View full text Add to dashboard Cite

This paper reports on ferroresonance phenomenon in distribution networks after the islanding of a distributed generation (DG) unit. Five coupling transformer configurations in synchronous machine-based DG are used to analyze and discuss occurrences of ferroresonance. PSCAD/EMTDC software was used to simulate the various configurations to collect data for analysis. Chaos theory was used to analyze the simulation results in a MATLAB environment in order to understand the type of ferroresonance present. This paper supports that synchronous machine-based DG units could be highly prone to occurrence of ferroresonance phenomenon after islanding with differences observed among the five configurations studied. This paper confirms that a groundedwye/delta connection is highly prone to ferroresonance and a delta/grounded-wye connection avoids ferroresonance when a DG unit becomes an island. Résumé-Ce travail de recherche concerne le phénomène de ferrorésonance dans les réseaux de distribution après l'isolation d'une unité de production distribuée (PD). Cinq configurations de transformateurs de couplage de PD basés sur les machines synchrones sont utilisées pour analyser et discuter des occurrences de ferrorésonance. Le logiciel PSCAD/EMTDC a été utilisé pour simuler les différentes configurations pour l'acquisition des donnéespour l'analyse. La théorie du chaos a été utilisée pour analyser les résultats de la simulation avec MATLAB pour mieux comprendre la ferrorésonance en question. Cet article prouve que les unités PD synchrones basées sur les machines synchrones après l'isolation pourraient être sujettes à l'apparition du phénomène de ferrorésonance avec des différences observées entre les cinq configurations étudiées. Ce document confirme que la connexion Wye-Delta liée à la masse peut avoir lieu quand une unité PD est isolée et une connexion delta/masse évite la ferrorésonance quand une DG est isolée aussi.

show abstract

Section: Ferroresonance After Islanding Of Synchronousmentioning

confidence: 99%

Ferroresonance After Islanding of Synchronous Machine-Based Distributed Generation

Esmaeili

Rostami²,

Gharehpetian

et al. 2015

Can. J. Electr. Comput. Eng.

View full text Add to dashboard Cite

show abstract

“…There are various transformer winding connections to fulfill various needs such as handling single-phase loads, simplifying ground relaying, saving the insulation cost, and minimizing ferroresonance and harmonic problems [9]. To interconnect DG to utility systems, many transformer connection types have been proposed [10][11][12]. Each of them has advantages and disadvantages.…”

Section: Types Of Dg Transformer Connectionmentioning

confidence: 99%

“…With the objective function in (12), the maximum DG achieved from the Tabu search is expected to be the same as the one from After obtaining P DGmax , another Tabu search program will be used for minimizing the corresponding X N . That is, (P DGmax , X N min ) from Section 5 is the expected result for the problem here.…”

Section: Constraints All Constraints Can Be Summarized Frommentioning

confidence: 99%

Maximization of distributed generation by considering system operating limits and protection reach reduction as constraints

Chaitusaney

Yokoyama

2012

IEEJ Transactions Elec Engng

View full text Add to dashboard Cite

Increased distributed generation (DG) in systems always brings about the impacts on maintaining the operation of protection systems. This paper concentrates on the impact on the protection reach reduction and proposes a solution to eliminate this impact by using a suitable DG transformer in parallel with a grounding reactance at the neutral point of the transformer's winding. Based on this, a Tabu search algorithm is proposed to maximize DG when the system operating limits and the protection reach reduction are considered as constraints. In order to illustrate the effectiveness of this algorithm, a case study is performed through an IEEE 34 Node Test Feeder. connection. Section 3 analyzse this issue, and then an appropriate connection type is proposed. After analyzing impacts of DG on the reach of relay in Section 4, a practical and robust algorithm for maximizing DG is developed in Section 5 using a sensitivitybased method. This method gradually increases the size of DG until the constraints of system operating limits and protection reach reduction are reached. To extend the method to several DG systems, the multivariable optimization problem is developed by using the Tabu search algorithm, which is presented in Section 6. Then, these two algorithms are applied to an IEEE 34 Node Test Feeder in Section 7.Dao Van Tu (Student member) received the Engineer degree and master's degree in power systems from Ha Noi

show abstract

“…For example research power prediction only consider forecasting precision and no effect on the capacity of energy storage device; The energy storage device only consider how to select energy storage device and no late combined with energy storage devices in the network behavior [2][3][4][5]. In addition, the new energy research hotspot focused on its implementation in form, such as the topology of the inverter, harmonic elimination circuit design and the energy of fine management, etc [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Research on New Energy Establishment of Power Generation and Structure Model

Gao¹,

Guan²

2014

Proceedings of the 2014 International Conference on Mechatronics, Electronic, Industrial and Control Engineering

View full text Add to dashboard Cite

Abstract-Traditional power supply system with the method of centralized power generation, and then use electricity transmission network transmit electricity to the user. Research model is the basis of the research on the subsequent issue, how to set up a valid practical problems but not entirely confined to the actual problem and has good adaptability model is valuable to determine whether the results of one of the key. the model is based on the Washington university school of electrical IEEE 30 "power structure as the foundation. New energy in power generation system generally includes wind power, photovoltaic power station and key components such as energy storage power station. This paper will design a reasonable system structure, using universal transmission line structure simplifies the structure of the power supply system; comparative analysis of advantages and disadvantages of various optimization algorithms. The final choice of primal dual optimization algorithm as optimizing kernel algorithm.

show abstract

Impacts of Distributed Generation on Electric Grid and Selecting of Isolation Transformer

Cited by 7 publications

References 3 publications

Ferroresonance After Islanding of Synchronous Machine-Based Distributed Generation

Ferroresonance After Islanding of Synchronous Machine-Based Distributed Generation

Maximization of distributed generation by considering system operating limits and protection reach reduction as constraints

Research on New Energy Establishment of Power Generation and Structure Model

Contact Info

Product

Resources

About