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大型压水堆核电机组失磁动态特性及机理研究

DOI: 10.13334/j.0258-8013.pcsee.2014.10.004, PP. 1538-1545

Keywords: 压水堆核电机组,失磁故障,机组保护,动态响应,厂用电

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Abstract:

核电机组(nuclearpowerplant,NPP)具有单机容量大、核安全要求高等特性,失磁故障会影响核电机组安全性。为研究核电机组失磁时的机网协调控制策略,建立了大型压水堆核电机组的发电机模型、汽轮机及其控制系统模型、反应堆堆芯控制系统模型、励磁系统模型及失磁故障数学模型,研究了核电机组在不同功率水平运行时的失磁动态响应特性及机理。结果表明:满载失磁对反应堆及热力系统冲击大,核电机组应可靠跳闸;低功率运行失磁时,核电机组可以短期内维持并网异步运行;核电机组发生失磁导致厂用电的可靠性和供电质量下降,应该采取相应措施提高厂用电的可靠性。

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