一体化智能电网中模块化功能单元的设计与实现

Integrated Design and Implementation of Modular Functional Units in Smart Grid

随着现代电力系统复杂度的不断增加,其运行和控制相比传统电网而言面临着巨大的挑战。现代电力系统需要一方面实现各组件之间的协调运行;另一方面也要实现各自"即插即用"的模块化运行功能,由此实现在一体化智能系统引导下的模块化灵活运行模式。为此给出了一体化智能系统中模块化功能单元设计和实现的具体方法。首先,从模块化功能单元彼此之间协调运行的角度入手,以阻抗匹配特性作为系统稳定运行的判定标准;其次,从网侧交互稳定运行的角度入手,给出了对变换器网侧阻抗的估算方法。从理论上分析了上述方法的工作原理,而后利用Matlab/Simulink搭建了包含多台并联模块化单元的仿真模型,验证了上述所提出的模块化功能单元在一体化智能电网中的应用。

With the development of the complexity of modem power system, its control and operation are facing great challen- ges compared to the conventional power system. Coordinated control of parallel functional units in modern power system should be satisfied. Meanwhile, ＂plug - and - play＂ should be achieved for each unit. Hence, the flexible operation and modular de- sign should be realized in modern smart grid. In order to fulfill the above - mentioned requirements, the integrated design and implementation for modem smart grid is presented. Firstly, as viewed from the coordinated control of different modular func- tional units, the impedance matching is taken as the criterion. Secondly, as viewed from the interaction between the local in- verter and external utility grid, the estimation method for grid impedance is proposed. Theoretical analysis is carried out, and then the simulation model composed of multiple parallel inverters is established with Matlab/Simulink, which is implemented to verify the effectiveness of the proposed method.