多端柔性多状态开关(flexible distribution switch,FDS)的接入从根本上影响了配电网的网架结构和运行方式,使得配电网的潮流分布和动态特性发生改变。对此,首先基于FDS的拓扑结构及其控制策略确定其工作外特性,建立含FDS主动配电网动...多端柔性多状态开关(flexible distribution switch,FDS)的接入从根本上影响了配电网的网架结构和运行方式,使得配电网的潮流分布和动态特性发生改变。对此,首先基于FDS的拓扑结构及其控制策略确定其工作外特性,建立含FDS主动配电网动态潮流运行模型;同时,定义负荷安全裕度、功率增量配比和潮流均衡度,作为描述潮流转移分布特征的指标;再将原模型转化为混合整数二阶锥规划模型,并调用优化求解器获取最优解;最后,依托实际工程运行数据开展仿真测试,结果表明:FDS参与配电网协调运行可改善电压均衡并降低网损,所述潮流指标可有效评估潮流分配特性,算法高效且寻优稳定。展开更多
A 28 year old pregnant woman of gestational history G1P0 was referred to medical out-patient-department on 5 Aug 2015 at her gestational age of 15 weeks due to sensation of generalizeddistention over face,neck,hands a...A 28 year old pregnant woman of gestational history G1P0 was referred to medical out-patient-department on 5 Aug 2015 at her gestational age of 15 weeks due to sensation of generalizeddistention over face,neck,hands and both lower limbs since Nov 2014,by which time blood analysis showed mildly increased morning cortisol level at 21.7 ug/dL(6.19-19.43 ug/dl in nonpregnant women)during medical work up.To repeat blood analysis showed the previously increased cortisol level remained at 20.04 ug/dl.The physical examination during her consultation showed no appreciable Cushingoid appearance and her blood pressure was normal.展开更多
文摘多端柔性多状态开关(flexible distribution switch,FDS)的接入从根本上影响了配电网的网架结构和运行方式,使得配电网的潮流分布和动态特性发生改变。对此,首先基于FDS的拓扑结构及其控制策略确定其工作外特性,建立含FDS主动配电网动态潮流运行模型;同时,定义负荷安全裕度、功率增量配比和潮流均衡度,作为描述潮流转移分布特征的指标;再将原模型转化为混合整数二阶锥规划模型,并调用优化求解器获取最优解;最后,依托实际工程运行数据开展仿真测试,结果表明:FDS参与配电网协调运行可改善电压均衡并降低网损,所述潮流指标可有效评估潮流分配特性,算法高效且寻优稳定。
文摘A 28 year old pregnant woman of gestational history G1P0 was referred to medical out-patient-department on 5 Aug 2015 at her gestational age of 15 weeks due to sensation of generalizeddistention over face,neck,hands and both lower limbs since Nov 2014,by which time blood analysis showed mildly increased morning cortisol level at 21.7 ug/dL(6.19-19.43 ug/dl in nonpregnant women)during medical work up.To repeat blood analysis showed the previously increased cortisol level remained at 20.04 ug/dl.The physical examination during her consultation showed no appreciable Cushingoid appearance and her blood pressure was normal.