摘要
海上风电场送出高压海缆沿途敷设条件通常有空气中敷设、J管敷设、海底敷设、滩涂直埋敷设和电缆沟敷设,而其载流限制瓶颈处一般在岸边2~5 km范围的滩涂直埋段,当前大部分的研究重点是提升或者精确计算海缆载流量以满足大于回路最大持续工作电流,但对最大持续工作电流的计算研究不多。本文从最重要的影响参数有功功率P_(n)和功率因数cosθ分布出发,研究滩涂直埋敷设段海缆回路最大持续工作电流的计算问题。研究表明,滩涂直埋敷设段海缆有功功率应该考虑登陆段之前的损耗,功率因数的取值应根据实际潮流计算结果选取。
According to different laying conditions along the way, the high voltage submarine cables sent from offshore wind farms are usually laid in several different laying modes, including in-air laying, J-pipe laying, seabed laying, inter-tidal direct-buried laying and cable trench laying. The bottleneck of the current carrying capacity of the cables is generally in the inter-tidal direct-buried laying section within 2~5 km of the shore. Currently, most of the research work focuses on improving or accurately calculating the current carrying capacity of the submarine cables to satisfy the maximum continuous working current requirement of the cable circuit. While there are few studies on the calculation of the maximum continuous working current. Considering the most important influencing factors, the active power P_(n) and the power factor cosθ distribution, the calculation of the maximum continuous working current of the submarine cable circuit in the inter-tidal direct-buried section is studied. The results show that the power loss before the landing section should be considered in the active power of the submarine cables in the inter-tidal direct-buried section, and the value of the power factor should be selected according to the actual power flow calculation results.
作者
胡新远
刘文阳
HU Xinyuan;LIU Wenyang(Shaanxi Guanghua Jianneng Electric Engineering Co.,Ltd.,Xi’an 710000,China;Towngas Energy Investment Co.,Ltd.,Shenzhen 518000,China)
出处
《水电与新能源》
2023年第2期17-22,共6页
Hydropower and New Energy
关键词
海缆载流量
功率因数分布
最大持续工作电流
current carrying capacity of submarine cable
power factor distribution
maximum continuous working current
