直驱风电机组控制系统与弱交流线路间因动态相互作用易引发次同步振荡。为此,提出了一种基于双锁相环补偿电流的次同步振荡抑制策略。通过推导系统的传递函数模型,分析了风机控制系统与交流线路间相互作用对并网系统稳定性的影响,揭示...直驱风电机组控制系统与弱交流线路间因动态相互作用易引发次同步振荡。为此,提出了一种基于双锁相环补偿电流的次同步振荡抑制策略。通过推导系统的传递函数模型,分析了风机控制系统与交流线路间相互作用对并网系统稳定性的影响,揭示了系统的次同步振荡机理;在传统附加次同步阻尼控制(sub-synchronous damping controller,SSDC)的基础上,考虑锁相环相角扰动,通过双锁相环在风机网侧变流器(gride side converter,GSC)电压外环控制系统中引入补偿电流,以削弱风机GSC与交流线路间引发次同步振荡的相互作用,从而抑制次同步振荡。仿真结果验证了所提方法在电网强度变化与风速变化工况下的抑制效果。展开更多
We propose a novel extension of quantum field theory by introducing Intrinsic Quantum Oscillators (IQuO) to describe the internal degrees of freedom of a particle. IQuO is composed of sub-oscillators with semi-quanta ...We propose a novel extension of quantum field theory by introducing Intrinsic Quantum Oscillators (IQuO) to describe the internal degrees of freedom of a particle. IQuO is composed of sub-oscillators with semi-quanta and are described by creation operators and annihilation with two components each. In the interaction between two particles, thanks to the structure with semi-quants of an IQuO, it is possible to show that in the initial phase of a coupling between two particle-fields, a non-dynamic process of reduction from a non-local to a local state takes place. Besides, IQuO allows us to demonstrate a direct correlation between the two directions of phase rotation of the wave function of a particle and the two signs of its electric charge. This connection provides a new understanding of particle-antiparticle pair creation and their associated virtual boson fields. Finally, two distinct IQuO configurations, B-IQuO and F-IQuO, explain the fundamental difference between fermions and bosons.展开更多
文摘直驱风电机组控制系统与弱交流线路间因动态相互作用易引发次同步振荡。为此,提出了一种基于双锁相环补偿电流的次同步振荡抑制策略。通过推导系统的传递函数模型,分析了风机控制系统与交流线路间相互作用对并网系统稳定性的影响,揭示了系统的次同步振荡机理;在传统附加次同步阻尼控制(sub-synchronous damping controller,SSDC)的基础上,考虑锁相环相角扰动,通过双锁相环在风机网侧变流器(gride side converter,GSC)电压外环控制系统中引入补偿电流,以削弱风机GSC与交流线路间引发次同步振荡的相互作用,从而抑制次同步振荡。仿真结果验证了所提方法在电网强度变化与风速变化工况下的抑制效果。
文摘We propose a novel extension of quantum field theory by introducing Intrinsic Quantum Oscillators (IQuO) to describe the internal degrees of freedom of a particle. IQuO is composed of sub-oscillators with semi-quanta and are described by creation operators and annihilation with two components each. In the interaction between two particles, thanks to the structure with semi-quants of an IQuO, it is possible to show that in the initial phase of a coupling between two particle-fields, a non-dynamic process of reduction from a non-local to a local state takes place. Besides, IQuO allows us to demonstrate a direct correlation between the two directions of phase rotation of the wave function of a particle and the two signs of its electric charge. This connection provides a new understanding of particle-antiparticle pair creation and their associated virtual boson fields. Finally, two distinct IQuO configurations, B-IQuO and F-IQuO, explain the fundamental difference between fermions and bosons.
