국내 대규모 해상풍력단지 연계 시 재생에너지 간 상호영향성을 고려한 강건도 평가
Evaluating System Strength Considering the Interaction of Renewable Energy: Large-scale Offshore Wind Farm Connected in KEPCO Systems
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When a large-scale offshore wind farm is connected to a grid, the interaction with existing renewable energy sources in the connected area causes a decrease in system strength. The short circuit ratio (SCR) is a representative index that evaluates the strength of a system. However, since SCR does not take into account the interaction of renewable energy sources, a higher system strength evaluation may appear than the actual system strength in areas where renewable energy is concentrated. Therefore, in this paper, the system strength of the Honam area is evaluated using the inverter interaction level (IIL) index, which considers the interaction of renewable energies using the power tracking method. In addition, the impact of the interaction with renewable energy sources on system strength is analyzed by comparing the IIL index and the SCR index when connecting large-scale offshore wind farms.
Abstract
When a large-scale offshore wind farm is connected to a grid, the interaction with existing renewable energy sources in the connected area causes a decrease in system strength. The short circuit ratio (SCR) is a representative index that evaluates the strength of a system. However, since SCR does not take into account the interaction of renewable energy sources, a higher system strength evaluation may appear than the actual system strength in areas where renewable energy is concentrated. Therefore, in this paper, the system strength of the Honam area is evaluated using the inverter interaction level (IIL) index, which considers the interaction of renewable energies using the power tracking method. In addition, the impact of the interaction with renewable energy sources on system strength is analyzed by comparing the IIL index and the SCR index when connecting large-scale offshore wind farms.
참고문헌 (7)
- Ministry of Trade and Industry, "Renewable source shares in renewable 3020 policy", ~ (2017)
- Ministry of Trade and Industry, "Offshore wind power generation plan", ~ (2020)
- Panhandle renewable energy zone(Prez) Study Report, "ERCOT", ~ (2014)
- Essential Reliability Services Task Force Measures Framework Report, "NERC", NERC, ~ (2015)
- Dohyuk Kim, "Evaluating Influence of Inverter-based Resources on System Strength Considering Inverter Interaction Level", Sustainability, 12(8), pp.3469~ (2020), MDPI AG[DOI]
- IEEE, "Guide for Planning dc Links Terminating at ac Locations Having Low Short-Circuit Capacities" (1997), IEEE
- NERC, "Integrating Inverter-Based Resources into Low Short Circuit Strength Systems, Reliability Guideline", ~ (2017)