电网作为网络型能量载送物理系统,在不同载流过渡模式下都具有相应的静态电压稳定边界,该边界的快速预估对电网在线电压稳定安全防控具有重要参考价值。因此,文章提出了一种计及参数追踪阶段特性的电网静态电压稳定边界(static voltage ...电网作为网络型能量载送物理系统,在不同载流过渡模式下都具有相应的静态电压稳定边界,该边界的快速预估对电网在线电压稳定安全防控具有重要参考价值。因此,文章提出了一种计及参数追踪阶段特性的电网静态电压稳定边界(static voltage stability region boundary,SVSRB)预估方法。首先阐述了静态电压稳定边界构建方法,并分析了构建过程中可能出现的失效场景;其次,针对该构建方法的缺陷,分别在预估和校正阶段提出了计及曲线外推和策略转换的边界追踪改进方法,避免了预估过程的复杂计算和校正过程中的迭代发散,并且能够利用中间计算信息,给出边界曲线的分段线性估计解析式;最后,经仿真算例验算,所提方法相较原始方法具有一定优越性。展开更多
We consider a one-dimensional continuous model of nutron star, described by a compressible thermoviscoelastic system with a non-monotone equation of state, due to the effective Skyrme nuclear interaction between parti...We consider a one-dimensional continuous model of nutron star, described by a compressible thermoviscoelastic system with a non-monotone equation of state, due to the effective Skyrme nuclear interaction between particles. We will prove that, despite a possible destabilizing influence of the pressure, which is non-monotone and not always positive, the presence of viscosity and a sufficient thermal dissipation describe the global existence of solutions in H^4 with a mixed free boundary problem for our model.展开更多
文摘电网作为网络型能量载送物理系统,在不同载流过渡模式下都具有相应的静态电压稳定边界,该边界的快速预估对电网在线电压稳定安全防控具有重要参考价值。因此,文章提出了一种计及参数追踪阶段特性的电网静态电压稳定边界(static voltage stability region boundary,SVSRB)预估方法。首先阐述了静态电压稳定边界构建方法,并分析了构建过程中可能出现的失效场景;其次,针对该构建方法的缺陷,分别在预估和校正阶段提出了计及曲线外推和策略转换的边界追踪改进方法,避免了预估过程的复杂计算和校正过程中的迭代发散,并且能够利用中间计算信息,给出边界曲线的分段线性估计解析式;最后,经仿真算例验算,所提方法相较原始方法具有一定优越性。
文摘We consider a one-dimensional continuous model of nutron star, described by a compressible thermoviscoelastic system with a non-monotone equation of state, due to the effective Skyrme nuclear interaction between particles. We will prove that, despite a possible destabilizing influence of the pressure, which is non-monotone and not always positive, the presence of viscosity and a sufficient thermal dissipation describe the global existence of solutions in H^4 with a mixed free boundary problem for our model.
