某水电站机组并网瞬间逆功率工况原因分析及对策  

Reason Analysis and Countermeasure for Reverse Power Condition of a Hydropower Station Unit at Instant Connection to Grid

作　　者：熊国恩 李雨通 李桃 苏纬强 XIONG Guo-en;LI Yu-tong;LI Tao;SU Wei-qiang(Yalong River Hydropower Development Company.Ltd.,Chengdu 610051,China)

机构地区：[1]雅砻江流域水电开发有限公司,四川成都610051

出　　处：《云南水力发电》2022年第1期216-219,共4页Yunnan Water Power

摘　　要：根据某水电站4台机组并网瞬间偶然出现的逆功率工况进行研究,以并网冲击电流为标准,详细介绍同期参数的核算过程,确保同期参数设置合理,并进一步分析确认频率差设置偏大是导致机组并网瞬间出现逆功率工况的主要原因,研究其产生的原因以及降低机组并网瞬间吸收有功功率工况出现的频次,对电站机组的安全稳定运行具有重大意义。并据此提出具体措施,提高该水电站机组并网品质。This paper mainly studies the occasional inverse power condition of 4 units of a hydropower station at the moment of grid connection.Taking grid-connected impact current as standard,the calculation process of parameters in the same period is introduced in detail to ensure the reasonable setting of parameters in the same period.Further analysis confirms that the large frequency difference setting is the main reason that causes the inverse power condition of the unit at the instant of grid connection.It is of great significance for the safe and stable operation of the power unit to study the causes and reduce the frequency of active power absorbed instantaneously by the unit connecting to the grid.Specific measures are put forward to improve the grid connection quality of the unit.

关 键 词：有功功率 电压差 相角差 频率差 冲击电流 

分 类 号：TV734.21[水利工程—水利水电工程] TM761.2[电气工程—电力系统及自动化]