基于RTDS与QualNet的电网和通信网半实物联合仿真系统

在智能电网和能源互联网中,通信的中断、延时和误码等因素会对电网安全稳定造成影响,因此有必要研究通信系统和电力系统的交互作用,而半实物仿真技术是研究其交互影响的有效手段。在对支撑电网稳控业务的同步数字体系(SDH)通信网络的特点和动态特性分析的基础上,提出了基于实时数字仿真器(RTDS)与QualNet的电网和通信网半实物联合仿真系统的整体框架,并开发了可以实现电力二次控制设备和通信SDH设备实物接入的电网和通信网半实物联合仿真系统,用于研究通信对电网稳控系统的影响。最后,对联合仿真系统的固有延时进行了测试,证明了其可靠性,并以华东频率协控系统闭环仿真为算例,利用该联合仿真系统验证了通信通道误码率增大对稳定控制装置功能和控制效果的影响。

Hardware-in-the-loop Co-simulation System for Power Grid and Communication Network Based on RTDS and QualNet

As the factors of interruption, latency and bit-error-rate(BER)of the communication play a very important role in the security and stability control of power system for the smart grid and the Energy Internet. So it is important to study the interaction between the power system and the communication network, and the hardware-in-the-loop co-simulation is a very useful tool for this kind of study. Based on the analysis of dynamic features and the characteristics of synchronous digital hierarchy(SDH)network, a framework of a hardware-in-the-loop co-simulation system for power system and communication network using the real time digital system(RTDS)and QualNet are introduced. Then, a hardware-in-the-loop co-simulation system for the power system and communication network with power system secondary control equipment and SDH equipment is developed to study the impact of communication failure on the power stability control system. Tests are done to measure the inherent latency of the developed co-simulation system to verify the reliability. Finally, the frequency coordinated control system in East China grid territory is used as an example, and a close-loop simulation is performed in the co-simulation system to validate the impact of the communication BER on the functions of the stability control system and the control effect.