대용량 태양광전원이 연계된 배전계통의 전압안정화를 위한 소수력발전기의 최적전압제어 알고리즘

다국어 초록 (Multilingual Abstract)

According to the government’s policy to demonstrate and expand the renewable energy sources, distributed generators such as PV and WP are installed and operated in distribution systems. However, there are many issues related to power quality problems including over voltage and under voltage of customers. In order to overcome these problems, the electric power company have installed a step voltage regulator (SVR) in primary feeders interconnected with distributed generators, and also have established the technical guidelines for the distributed generators to stabilize the customer voltages in distribution systems. However, it is difficult to maintain the customer voltages within allowable limit. Therefore, this paper reviews the problems of voltage control by SVR in a distribution systems interconnected with a large amount of PV systems, and proposes characteristics of operating range and voltage control limit of the small hydropower generators. Also, with the estimation of the influence to the power system voltages from the voltage control mode of generators, this paper proposes the optimal voltage control algorithm of the small hydropower generators. By programming the proposed algorithm into control simulator of exciter, it is confirmed that the proposed algorithm can contribute the voltage stabilization in distribution systems interconnected with large scaled PV systems.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 분산형전원 연계계통 전압제어 한계 분석
• 3. 계통전압안정화를 위한 소수력발전기 최적전압제어 알고리즘 구현
• 4. 시뮬레이션 및 실 계통 적용
• 5. 결론
• References

참고문헌 (Reference)

1 "Technical guidelines for the distributed generators"

2 "RTS-7000, Generator excitation system test simulator, Manufacturer E2S"

3 Byungki Kim, "Optimal Operation Methods of Protection Devices in Distribution Systems with PV Systems" 4 (4): 506-514, 2014

4 "New distribution engineering" Bookshill 2014

5 Roger C. Dugan, "Electrical Power System Quality, second edition"

6 "EPRI-RP3098-01, An Assessment of Distribution System Power Quality"

7 "DECS 250, Digital excitation control system manual"

8 Sibook Nam, "A study about extending usage of capability curve of generator" 49 (49): 66-73, 2000

9 Byungki Kim, "A Study on the Voltage Regulation Method of Distribution System Using Step Voltage Regulator and Energy Storage System" 2015