Power Flow Of Cim-based Asynchronous Parallel Computing Research

The scale of electronic power networks becomes bigger and bigger through connecting with each other. The structure of administration is layered and divisional, which brings demands of distributed load flow calculation of power system. The existing parallel load flow calculation algorithms are mostly developed for the sake of improving the speed of calculation. The models of calculation lack independence and flexibility. Furthermore, the algorithms are mostly synchronous. These algorithms can't meet the requirement for distributed load flow calculation of large scale power systems. How to achieve the load flow calculation of electronic power networks merely through exchanging a small quantity of information in the control centers is a meaningful problem.This paper puts forward a new idea through extending the network partition method which leads to some interesting outcomes. The work is mainly made up of two parts: a new asynchronous parallel load flow calculation algorithm and some conclusions about accurate equivalent.In the first part, a new asynchronous parallel load flow calculation algorithm is put forward, and an improved algorithm is also advanced based on the analyzing of the basic algorithm. The experiments indicate that the basic algorithm can attain the load flow result and the improved algorithm can improve the convergence rate and convergence of the exterior iterations. The Ward equivalent taking the unbalance power distribution into account is brought forward, which helps to implement the asynchronous parallel calculation of dynamic load flow.The second part is mainly about discussion on accurate equivalents of electronic power networks. Most existing steady-state equivalent methods of electronic power networks have been based on some assumptions. However, the equivalents are not accurate since these assumptions actually can't be met exactly. Based on giving the strict definition of equivalent, the concept of sub-accurate equivalent is brought forward, which leads to the conclusions that sub-accurate equivalents of electronic power networks always exist and accurate equivalents may exist.This paper consists of six chapters. Chapter 1 mainly talks about the basic knowledge of load flow calculation and the existing study on parallel load flow calculation. A new idea is introduced at length in chapter 2. That is how to extend the existing network partition method. In chapter 3, a new asynchronous parallel load flow calculation algorithm is talking about in detail. Chapter 4 is mainly about asynchronous parallel load flow calculation based on CIM. Chapter 5 is mainly about the strict definition of equivalent and some deductions. The last chapter is a summary of the accomplished work and future work.This paper put forward a new asynchronous parallel load flow calculation algorithm, which can promotes the study on distributed load flow calculation of the large scale electronic power networks. The study on accurate equivalent helps people to understand the essence characters of equivalent and provide foundation for further study on equivalents of nonlinear system such as electronic power networks.