基于惯量刚度协同补偿的配电系统电压矢量动态优化

Dynamic Voltage Vector Optimization of Distribution Systems Based on Inertia Stiffness Collaborative Compensation

配电系统是用户供电的“最后一公里”,决定了用户的供电质量,影响用户设备的高质量运行。为探索负荷扰动下配电系统电压幅值和相位动态(即电压矢量动态)问题,从逆变器惯量及刚度的内涵出发,提出了基于逆变器惯量刚度协同补偿的电压优化方法,分析了该方法优化电压矢量的作用机理,并与目前常用的补偿装置对比。在MATLAB/Simulink平台上搭建典型的配电系统场景,仿真对比惯量刚度补偿器和静止无功发生器对电压矢量的改善效果,分析不同扰动下的电压动态变化和异步电动机的运行情况。结果表明:基于惯量刚度的协同补偿方法对电压幅值及相位的突变均有显著的抑制效果,在静止无功发生器加剧相位跳变的情况下,该方法能减少接近60%的跳变幅度,同时能够有效提升扰动下异步电动机的运行性能。这证明了所提优化方法的有效性。

The distribution system is the“last mile”of power supply to users,determining the quality of power supply and affecting the high-quality operation of user equipment.To explore the dynamic voltage magnitude and phase(that is vector dynamics)of the distribution system under load disturbances,starting from the connotation of inverter inertia and stiffness,this paper proposes a voltage optimization method based on the collaborative compensation of inverter inertia stiffness.It analyzes the mechanism of this method in optimizing the voltage vector and compares with currently commonly used compensation devices.Afterwards,a typical distribution system scenario is built on the MATLAB/Simulink platform,and the effectiveness of the inertia stiffness compensator and the static var generator in improving voltage vector is simulated and compared.The voltage dynamic changes under different disturbances and the operation of asynchronous motors are analyzed.The results show that the inertia stiffness based cooperative compensation method has a significant effect on the suppression of voltage amplitude and phase jump.When the phase jump is intensified by the static var generator,the method can reduce the jump amplitude by nearly 60%.At the same time,this method can effectively improve the operation performance of asynchronous motor under disturbance,which proves the effectiveness of the proposed optimization method.