Improvement in policy and proactive interconnection procedure for renewable energy expansion in South Korea

Kim, Sehyun; Lee, Hyunjae; Kim, Heejin; Jang, Dong Hwan; Kim, Hyun Jin; Hur, Jin; Cho, Yoon Sung; Hur, Kyeong

doi:10.1016/j.rser.2018.09.013

Cited by 65 publications

(25 citation statements)

References 29 publications

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“…The simulations were conducted using PSS (r) E program (Power Transmission System Planning Software). Due to the national energy policy, which mandates more renewable energy resources, the amount of REG in the Korea power system in 2031 will be about 50 GW, which would account for 20% of the total power generation capacity in Korea [26,27].…”

Section: Case Studiesmentioning

confidence: 99%

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Enhancing Line Capacity Utilization in Power Transmission System Using Active MVDC Link

et al. 2019

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As a proportion of generation using renewable energy increases in a power system, the need for facility investment is increasing in not only the distribution system but also the transmission system. However, it is inefficient to invest in new equipment to deal with the short peak output of renewable energy generation. For this reason, this paper proposes a method for operating the grid more flexibly, through an optimal operating strategy of the direct current (DC) line at medium-voltage (MV) level, thereby delaying the facility investment in the transmission line. In order to determine the optimal operating point of the converter connected with a DC line, the swarm intelligence-based optimization technique, which can minimize multi-objective function, is used. In addition, in order to overcome the communication dependency of the centralized control, which needs to receive information about the optimal operating point computed by the system operator, this paper proposes a decentralized emergency control (DEC) method in case of a communication fault.

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Section: Case Studiesmentioning

confidence: 99%

“…In this paper, the test network was determined as the 'Jeon-Nam' area in the Korea power system, because the planned REG in 2031 at this area is the largest in Korea because of its geographical and weather characteristic condition [27]. In the 'Jeon-Nam' area, two candidates for MVDC link installation were proposed as shown in Figure 3.…”

Section: Case Studiesmentioning

confidence: 99%

Enhancing Line Capacity Utilization in Power Transmission System Using Active MVDC Link

et al. 2019

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“…For South Korea, renewable energy capacity grew by as much as 13,846 MW in 2016, and the Korean government put forward the 3020 Project, which presents its objective for the portion of renewable energy source penetration from 7% to more than 20% of total generation by 2030. This means approximately 60 GW of renewable energy facility is required [3].…”

Section: Introductionmentioning

confidence: 99%

Advanced Fault Ride-Through Strategy by an MMC HVDC Transmission for Off-Shore Wind Farm Interconnection

et al. 2019

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In order to solve the problems brought upon by off-shore wind-power plants, it is important to improve fault ride-through capability when an on-shore fault occurs in order to prevent DC overvoltage. In this paper, a coordinated control strategy is implemented for a doubly-fed induction generator (DFIG)-based off-shore wind farm, which connects to on-shore land by a modular multilevel converter (MMC)-based high voltage direct current (HVDC) transmission system during an on-shore fault. The proposed control strategy adjusts the DC voltage of the off-shore converter to ride through fault condition, simultaneously varying off-shore AC frequency. The grid-side converter detects the frequency difference, and the rotor-side converter curtails the output power of the DFIG. The surplus energy will be accumulated at the rotor by accelerating the rotor speed and DC link by rising DC voltage. By the time the fault ends, energy stored in the rotor and energy stored in the DC capacitor will be released to the on-shore side to restore the normal transmission state. Based on the control strategy, the off-shore wind farm will ride through an on-shore fault with minimum rotor stress. To verify the validity of the proposed control strategy, a DFIG-based wind farm connecting to the on-shore side by an MMC HVDC system is simulated by PSCAD with an on-shore Point of Common Coupling side fault scenario.

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“…To combine these efforts, a number of countries including South Korea have established regulations to enforce the installation of RES in buildings [11][12][13]. The European Union (EU) has also set a target for all new buildings to be nearly zero-energy by 2020 [14].…”

Section: Introductionmentioning

confidence: 99%

Optimal Decision-Making of Renewable Energy Systems in Buildings in the Early Design Stage

Baek

Lee

2019

Sustainability

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Renewable energy systems (RES) in buildings should be designed carefully, not only because of the need for an optimal design, but also to comply with related laws. Therefore, the design of RES in the buildings requires close collaboration between architects and engineers from the beginning of the design process. To support such collaboration, this study proposes a simplified design method for RES in buildings during the early design stage. By using the proposed design method, design alternatives that meet the required energy standards as suggested by law are first generated. Further designs are made to evaluate the performance and cost of the design alternatives and to find the optimal types of RES for the building. The study also uses a case study to verify the applicability of the design method to the early design stage. Although the performance and cost of the different design alternatives are similar, the implementation of each type of RES in each design alternative is different. Nonetheless, by analyzing performance patterns and the cost ratio of each type of RES in each design alternative, the study allows the most suitable type of RES to be chosen for the building.

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Improvement in policy and proactive interconnection procedure for renewable energy expansion in South Korea

Cited by 65 publications

References 29 publications

Enhancing Line Capacity Utilization in Power Transmission System Using Active MVDC Link

Enhancing Line Capacity Utilization in Power Transmission System Using Active MVDC Link

Advanced Fault Ride-Through Strategy by an MMC HVDC Transmission for Off-Shore Wind Farm Interconnection

Optimal Decision-Making of Renewable Energy Systems in Buildings in the Early Design Stage

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