Analysis of Voltage Variations of a Large-Scale Offshore Wind Farm Connected to Taipower Grid
When a high-capacity offshore wind farm (OWF) is connected to a power system, the power quality of the power system can be significantly deteriorated under various wind speeds. This paper presents the analyzed voltage variations of Taiwan Power System con
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Abstract When a high-capacity offshore wind farm (OWF) is connected to a power system, the power quality of the power system can be significantly deteriorated under various wind speeds. This paper presents the analyzed voltage variations of Taiwan Power System connected with a 100-MW OWF using a commercial power system simulation software. The ultrahigh voltage bus of ten onshore substations that are close to the potential OWF is selected as the connection point. The voltage variation results at the connection points under different lengths of submarine cable are accomplished and analyzed when the 100-MW OWF is connected to the selected substations. The simulated results can offer a reference for the development of OWFs in Taiwan in the near future. Keywords Offshore wind farms • Grid connection • Voltage variations
1 Introduction The fast development of industry and the excessive use of fossil fuels have led to a shortage of energy in recent years. In addition to the global climate anomaly changes, the health of human being can also be significantly threatened. Besides, the protest of the development of nuclear power generation systems becomes the topic of global concern after an earthquake happened in Fukushima, Japan, damaging nuclear power plants. Taiwan lacks of indigenous energy, and most energy relies on imports. Hence, research and development of the clean and pollution-free renewable energy resources for Taiwan are an important issue, while wind energy is one of the best candidates among various renewable energy resources [1].
L. Wang (*) • C.-J. Yeh • M.-H. Hsieh • C.-T. Wu • C.-L. Lu Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan e-mail: [email protected] J. Juang and Y.-C. Huang (eds.), Intelligent Technologies and Engineering Systems, Lecture Notes in Electrical Engineering 234, DOI 10.1007/978-1-4614-6747-2_59, # Springer Science+Business Media New York 2013
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At present, the development of onshore wind power generation systems in Taiwan has reached a bottleneck. However, offshore wind power generation systems in Taiwan are still under planning stages. When a high-capacity renewable energy resource or a distribution generation (DG) system such as an offshore wind farm (OWF) is connected to a power system, the power quality at the point of common coupling (PCC) of the power system can be significantly deteriorated under various operating conditions [2, 3]. The effects of high-capacity renewable energy resource connected to a power system have to be evaluated before practical installation. This paper presents the simulation results of an OWF connected to the ultrahigh voltage bus of ten onshore substations that have higher potential for future development in Taiwan. The simulated voltage variation results of an OWF of 100 MW connected to Taiwan Power System through a submarine cable under different lengths are performed by using a power system simulation software.
2 System Configuration The single-line diagram of the studied OWF
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