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提出了一种抽水蓄能机组抽水工况下同期并网参数的整定计算方法,该方法基于对抽水蓄能机组抽水工况下并网过程的理论分析,结合了机组并网参数整定的原则,利用数学模型进行推导而得到。针对抽水工况下合闸脉冲导前时间取值的不同,推导了在合闸脉冲导前时间内机组电压和频率的变化情况,进而计算出同期并网时的允许电压差、频率差和相角差等并网参数。本文的并网参数整定计算方法为抽水蓄能机组同期并网定值的设定提供了理论依据,对于减小并网冲击电流、提高同期并网成功率具有重要意义。
This paper presents a method for calculating and setting the parameters of grid connection during the pumping operation of pumped storage units. The method is based on the theoretical analysis of the grid-connected process of pumping storage units and the principle of grid-connected parameter setting. Derived using mathematical models. According to the different value of closing pulse leading time under pumping condition, the variation of unit voltage and frequency during the leading time of closing pulse is deduced, then the allowable voltage difference, frequency difference and phase Angle difference and other parameters of the grid. The calculation method of grid connection parameters in this paper provides a theoretical basis for the setting of the grid connection set value of the pumped storage unit in the same period and is of great significance for reducing the grid impact current and improving the grid connection success rate in the same period.