Intelligent Electronic Device (IED) Engineering Configuration And Communication Network Performance Analysis Of ITER-PPEN Substation Automation System

ITER is a representative prototype of a fusion power plant which has the biggest non-conventional power supply system in the world. The ITER electrical power distribution system is categorized into two parts:the Steady-State Electrical Network (SSEN) to supply to steady-state electrical loads and the Pulsed-Power Electrical Network (PPEN) powering pulsed loads. As part of PPEN substation preliminary design stops at the concept stage, the Substation Automation System (SAS) Engineering Design, as well as the performance analysis of design, are missing, to solve these problems, the deepen design of PPEN SAS engineering configuration is needed, and the time delay and availability analyses of PPEN SAS communication network should be completed. With these as research objectives, the main work and achievements of this paper are summarized as follows:The main electrical connection scheme & substation automation system architecture are introduced, based on which, the main functions the SAS need to implement are given. The main functions are achieved by configuring the Intelligent Electronic Devices (IED) functions and the communication between them.Then, the hardware & software structure of IED are introduced, on this basis, the implementation of IED’s protection, control & monitoring functions is analyzed. Its hardware limits the application occasions while its software achieves all the functions.In the next section, the IEC61850 based device model and communication model of IED are introduced, and the reason IEC61850 standard can be used to facilitate interoperability and platform independence is described.An OPNET model of PPEN-SAS communication network is used to analyze its time-delay parameters under different CPU utilization, different packet length, different transmission time interval and different link utilization. The experimental results are also provided. Based on the results of simulation and experimental methods, an optimized PPEN Substation Communication Network structure is proposed. The results show that the optimized PPEN Substation Communication Network structure can reduce the time-delay effectively.Availability indices are listed and calculated to evaluate PPEN Substation Automation System communication network’s availability based on practical maintenance strategy. On the basis of the calculated results discussion,2 ways are made to increase PPEN Substation Communication Network availability, and the optimized PPEN Substation Communication Network structure proposed hereinabove is one of them. After comparison of the 2 methods, the optimized PPEN Substation Communication Network structure has the advantages of reducing the construction cost, simplifying the communication network structure, reducing the time-delay and improving the system availability, therefore, can serve as a reasonable method to improve the performance of PPEN Substation Communication Network.