Voltage Control of Distribution Networks to Increase their Hosting Capacity in South Korea

Nam-Koong, Won; Jung, Won; Shin, Chang Hoon; Hwang, Pyeong-Ik; Jang, Gilsoo

doi:10.1007/s42835-021-00682-z

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…To determine the power injection for multiple DERs, a matrix of all possible combinations, 𝑁 𝐶 , is constructed using (6) with the total number of eligible buses 𝑁 𝐵 and the number of integrated DERs 𝑁 𝐷𝐸𝑅𝑠 [23].…”

Section: Power Injection For Multiple Dersmentioning

confidence: 99%

“…Distributed energy resources' hosting capacity (DERHC) is a well-known concept that has been extensively studied in recent years [2]- [6]; however, some problems still need to be addressed. Several methods have been proposed for the evaluation of DERHC using various programming and simulation based iterative [7], stochastic [8], [9], streamlined [10], and heuristic methods.…”

Section: Introductionmentioning

confidence: 99%

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Maximum Hosting Capacity Assessment of Distribution Systems With Multitype DERs Using Analytical OPF Method

2022

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Renewable energy is being increasingly integrated into distribution systems worldwide in response to technological, economic, and environmental challenges. The assessment of hosting capacity allows us to determine the maximum installation capacity of distributed energy resources (DERs) in a distribution system within its operational limits to obtain more benefits. In this study, a new multistage algorithm is developed based on an analytical approach and optimal power flow (OPF) for the assessment of DERs' hosting capacity (DERHC) with single and multiple multi-type DERs. In the first stage, the optimal locations of DERs are determined analytically, and the second stage involves the calculation of optimal DERs sizes for the assessment of the maximum locational and total DERHC. This method provides mathematical and global optimum certainty considering the constraints to maintain the reliability and protection of the system. Moreover, the proposed method is tested using a standard IEEE 33-bus distribution system, and different scenarios are created based on the number and type of DERs to achieve the best-case results of DERHC. The obtained results are compared with those of the conventional OPF iterative method that are encouraging and validate the accuracy and robustness of the proposed methodology.INDEX TERMS Analytical optimal power flow method, hosting capacity assessment, multi-type distributed generation, optimal power flow.

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Section: Power Injection For Multiple Dersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Maximum Hosting Capacity Assessment of Distribution Systems With Multitype DERs Using Analytical OPF Method

2022

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Harmonic Contribution Assessment Based on the Random Sample Consensus and Recursive Least Square Methods

Park

2022

Energies

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This paper deals with a method of quantifying the harmonic contribution of each harmonic source to system voltage distortion. Assessing the harmonic contribution of individual harmonic sources is essential for mitigating and managing system harmonic levels. Harmonic contributions can be evaluated using the principle of voltage superposition with equivalent voltage models for harmonic sources. In general, the parameters of equivalent voltage models are estimated numerically because it is difficult to measure them directly. In this paper, we present an effective method for estimating equivalent model parameters based on the random sample consensus (RANSAC) and recursive least square (RLS) with a variable forgetting factor. The procedure for quantifying harmonic contributions using equivalent models is also introduced. Additionally, we propose a network diagram of harmonic contributions that makes it easy to understand the harmonic distortion contributions of all harmonic sources.

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Control Method of Step Voltage Regulator on Distribution Lines with Distributed Generation

Kim

Lee

et al. 2022

Energies

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Generally, utilities regulate the voltage on the long power distribution line within a permissible range by using a step voltage regulator (SVR), which is located around the middle of the line and operates according to the condition of the line current. However, as large-scale distributed generations (DG’s) are interconnected into distribution lines, it is difficult to maintain the line voltage properly owing to bi-directional power flow or reverse power flow. Therefore, this paper proposes a novel SVR tap-changing algorithm to solve the problem, considering line load conditions and reverse power flow. Its validity is verified through the PSCAD/EMTDC software tool and simulations.

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Voltage Control of Distribution Networks to Increase their Hosting Capacity in South Korea

Cited by 3 publications

References 5 publications

Maximum Hosting Capacity Assessment of Distribution Systems With Multitype DERs Using Analytical OPF Method

Maximum Hosting Capacity Assessment of Distribution Systems With Multitype DERs Using Analytical OPF Method

Harmonic Contribution Assessment Based on the Random Sample Consensus and Recursive Least Square Methods

Control Method of Step Voltage Regulator on Distribution Lines with Distributed Generation

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