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This paper focuses on the structural stability and strength of smart grid. Power sources (generator systems) are very important in a power system and has Lorenz property. So in this paper, researched the dynamic property of multi-resources based on complex networks theory. We obtained that a system will have been a different stability under different coupled parameter, even change the stability of solutions of states different single Lorenz system via simulating. The result will be helpful in planning power grid and researching power grid stability. Introduction The transmission of power grid is also an unstable signal transmission carrier, which can easily lead to widespread power failure [1, 2]. To solve the new problem comes from large-scale power grid, America Electrical Power Research Institute (EPRI) imposed develop smart grid on 2003. Then some countries in Europe proposed the same think as EPRI on 2005. From then on the “smart grid” became a new focus research hot, and attracted lots of researchers to do work about it [3, 4]. Many grid are large scale and complex as power grid in real world such as society relationship net, transportation grid, communication net and so on [5]. So some researchers addressed study smart grid based on complex networks theory, and published many research articles [6-13]. In [14], Lorenz proposed Lorenz’s form when he researched the gradient model of air temperature, got the first chaos of the world of research. Although the chaos system born of air system, who exists in many area such as communication system, generate system, laser system, etc. In [15], constructed a chaos model via research permanent magnet synchronous generator (PMSG), illustrated PMSG system will be chaos under some one conditions by simulation, and the chaos status same as Lorenz chaos. The contributions in [16] analyze attractor character of coupling generators, stability and positive definite system through adaptive control algorithm. Ref [17] addressed coupling generators model and analyze its nonlinear character, and obtained the relationship between the resist parameter and non-linear character. Above all, synchronous generators have the Lorenz system specialty who exist many real world, so we research coupling systems characters use Lorenz system. In this article our research aim to the dynamic specialty of coupling generators and the effect of the strength of coupling to dynamic character of coupling systems. We do this work use complex networks theory. Our research results will benefit to power system planning in the future. This paper is organized as follows: in section 2 complex networks theory be introduced; Section 3, we will introduce Lorenz system; some simulations will be gave in section 4; conclusions will be gave in section 5.

Research the Coupling Power Systems Dynamic Property Based on Complex Networks Theory