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中文摘要：
分析了天津石化企业电网内部短路故障时的系统频率动态特性。指出有功缺额等相关参数的变化对系统频率动态过程的影响。建立了天津石化电网模型,对故障后企业电网过渡过程进行仿真分析,说明了结论的正确性。这对研究企业电网发生内部故障时,如何采取措施有效抑制频率迅速变化,防止频率崩溃,具有参考价值。
英文摘要：
The dynamic characteristics of system frequency during the internal short-circuit fault occurring in Tianjin petrochemical enterprise grid were analyzed.The impacts of the variations of the active power vacancy and other relevant parameters on the frequency dynamic process were pointed out.The grid model of Tianjin petrochemical grid was established and the simulation of the transition process after failure was made,which demonstrated the correctness of the conclusion.It can be valuable reference for taking effective measures to restrain the rapid changing and collapse of the frequency when internal fault occurred in enterprise grid.
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