태양광 발전과 ESS 시스템의 연계운전시 단독운전 방지 사례 연구

• Published in: 한국태양에너지학회 논문집 Vol. 39; no. 1; pp. 59 - 66
• Main Authors: 임종록(Jong Rok Lim), 황혜미(Hye-Mi Hwang), 신우균(Woo Gyun Shin), 주영철(Young-Chul Ju), 정영석(Young Seok Jung), 강기환(Gi-Hwan Kang), 고석환(Suk-Whan Ko)
• Format: Journal Article
• Language: Korean
• Published: 한국태양에너지학회 2019
• Subjects: 기타공학; 에너지 저장 시스템(ESS system); 태양광 발전 시스템(Photovoltaic system); 단독 운전 검출(Islanding detection)
• ISSN: 1598-6411; 2508-3562
• DOI: 10.7836/kses.2019.39.1.059

BIPV or BAPV installation applied to building is increasing through public utility mandates enterprise. Solar PV energy generates only during the day, but if it is operated in convergence with ESS, which stores electrical energy, it can restrain the fossil energy used in buildings throughout the day. A solution is to converge with PV system and ESS. However, PV systems and ESS connected to the power grid in parallel can cause problems of electrical stability. A study was conducted on the case of failure to detect islanding operation under the parallel operation of PV generation and ESS that are connected in parallel to power grid. Experiments conducted various non-islanding detections under the operating conditions. In the experiment results, when one PCS - PV inverter or ESS inverter - was operating under the islanding condition, it stopped working within 0.5 seconds of the Korean grid standard. However, when both of PV inverter and ESS inverter were operating at the same time under the islanding situation, the anti-islanding algorithm did not operate normally and both inverters continuously supplied power to the connected RLC loads. islanding detection Algorithm developed by each inverter manufacturer has caused this phenomenon. Therefore, this paper presented a new test standard for islanding detection.