This article summarized systematically the previous investigations on t he dielectric relaxation of wood, the main substances and extractives in wood at oven-dry state, and the dielectric relaxation based on the adso...This article summarized systematically the previous investigations on t he dielectric relaxation of wood, the main substances and extractives in wood at oven-dry state, and the dielectric relaxation based on the adsorbed water in w o od cell wall under equilibrium and non-equilibrium state. Moreover, some expect a tions for future research were proposed on this basis. The purpose of this artic le is to provide other researchers an overall understanding about the research i n this region, and further to promote the research onto a new and higher level.展开更多
针对传统下垂控制依据固定的下垂系数分配负荷功率未考虑线路阻抗的影响与储能单元容量信息,以及系统通信压力大、控制结构复杂等问题,提出1种无电压观测器的多储能协调运行控制策略。首先,所提策略引入含分布式储能单元DESUs(distribut...针对传统下垂控制依据固定的下垂系数分配负荷功率未考虑线路阻抗的影响与储能单元容量信息,以及系统通信压力大、控制结构复杂等问题,提出1种无电压观测器的多储能协调运行控制策略。首先,所提策略引入含分布式储能单元DESUs(distributed energy storage units)容量与荷电状态SOC(state-of-charge)的收敛函数修正初始下垂系数,且给出调节系数的约束条件,从而促进储能单元的SOC快速均衡;其次,通过引入虚拟额定功率,构造并均衡单位输出功率克服线路阻抗对DESUs负荷分配的影响。通过构造允许的母线电压最大偏差与平均单位功率的乘积得到母线电压补偿量,实现电压调节,其无需通信交换储能单元的节点电压信息与对应电压观测器、PI控制器的设计。最后,通过MATLAB/Simulink的仿真测试验证了所提策略的有效性。展开更多
文摘This article summarized systematically the previous investigations on t he dielectric relaxation of wood, the main substances and extractives in wood at oven-dry state, and the dielectric relaxation based on the adsorbed water in w o od cell wall under equilibrium and non-equilibrium state. Moreover, some expect a tions for future research were proposed on this basis. The purpose of this artic le is to provide other researchers an overall understanding about the research i n this region, and further to promote the research onto a new and higher level.
文摘针对传统下垂控制依据固定的下垂系数分配负荷功率未考虑线路阻抗的影响与储能单元容量信息,以及系统通信压力大、控制结构复杂等问题,提出1种无电压观测器的多储能协调运行控制策略。首先,所提策略引入含分布式储能单元DESUs(distributed energy storage units)容量与荷电状态SOC(state-of-charge)的收敛函数修正初始下垂系数,且给出调节系数的约束条件,从而促进储能单元的SOC快速均衡;其次,通过引入虚拟额定功率,构造并均衡单位输出功率克服线路阻抗对DESUs负荷分配的影响。通过构造允许的母线电压最大偏差与平均单位功率的乘积得到母线电压补偿量,实现电压调节,其无需通信交换储能单元的节点电压信息与对应电压观测器、PI控制器的设计。最后,通过MATLAB/Simulink的仿真测试验证了所提策略的有效性。
