针对大规模新能源接入后电力系统电压安全问题突出、快速评估困难的问题,文中以电力系统广域相量测量系统(Wide Area Measurement System,WAMS)为数据平台,在具有完备数学基础的无功电压灵敏度及分叉理论的基础上,建立了基于自然摄动的...针对大规模新能源接入后电力系统电压安全问题突出、快速评估困难的问题,文中以电力系统广域相量测量系统(Wide Area Measurement System,WAMS)为数据平台,在具有完备数学基础的无功电压灵敏度及分叉理论的基础上,建立了基于自然摄动的电力系统静态电压评估指标体系,根据WAMS获取的自然激励下的同步无功及电压响应数据,采用最小二乘法拟合计算无功电压灵敏度,并引入加权平均值算法对一段时间内的灵敏度结果进行统计,以提高拟合后的无功电压灵敏度准确性和可靠性。在DIGSILENT/Power Factory仿真平台上搭建了含风电场的IEEE10机39节点系统,利用时域仿真生成同步响应数据,对比不同运行情况下的灵敏度拟合结果与实际无功裕度,验证了文中静态电压安全评估方法的有效性。展开更多
In this contribution we study a superposition of two finite dimensional trio coherent states (FTCS). The state is regarded as a correlated three-mode state in finite dimensional bases. The framework of Pegg and Barnet...In this contribution we study a superposition of two finite dimensional trio coherent states (FTCS). The state is regarded as a correlated three-mode state in finite dimensional bases. The framework of Pegg and Barnett formalism, and the phase distribution in addition to the Poissonian distribution are examined. It is shown that the eigenvalue of the difference of the photon number (the q-parameter) is responsible for the non-classical phenomenon. Furthermore, the quasi-probability distribution functions (the Wigner and Q-functions) are also discussed. In this case and for the Wigner function the non-classical behavior is only reported for the odd values of the q-parameter.展开更多
文摘针对大规模新能源接入后电力系统电压安全问题突出、快速评估困难的问题,文中以电力系统广域相量测量系统(Wide Area Measurement System,WAMS)为数据平台,在具有完备数学基础的无功电压灵敏度及分叉理论的基础上,建立了基于自然摄动的电力系统静态电压评估指标体系,根据WAMS获取的自然激励下的同步无功及电压响应数据,采用最小二乘法拟合计算无功电压灵敏度,并引入加权平均值算法对一段时间内的灵敏度结果进行统计,以提高拟合后的无功电压灵敏度准确性和可靠性。在DIGSILENT/Power Factory仿真平台上搭建了含风电场的IEEE10机39节点系统,利用时域仿真生成同步响应数据,对比不同运行情况下的灵敏度拟合结果与实际无功裕度,验证了文中静态电压安全评估方法的有效性。
文摘In this contribution we study a superposition of two finite dimensional trio coherent states (FTCS). The state is regarded as a correlated three-mode state in finite dimensional bases. The framework of Pegg and Barnett formalism, and the phase distribution in addition to the Poissonian distribution are examined. It is shown that the eigenvalue of the difference of the photon number (the q-parameter) is responsible for the non-classical phenomenon. Furthermore, the quasi-probability distribution functions (the Wigner and Q-functions) are also discussed. In this case and for the Wigner function the non-classical behavior is only reported for the odd values of the q-parameter.
