数字保护继电器的抽象建模方法研究

该文提出了一种新的数字保护继电器抽象广义混杂Petri网（GHPN）分层建模方法,利用GHPN模型的连续层描述数字保护继电器连续变量的动态变化,由其逻辑层（Petri网）描述保护继电器的逻辑动态行为.文中建立了三段式数字距离保护继电器的GHPN模型,为了考虑影响保护动态行为的信号采集回路的非线性,建立了距离保护的暂态GHPN模型.仿真结果表明,保护模型GHPN是有效的,通过保护GHPN模型,可以详细地刻画保护内部动态行为以及保护与系统间的相互作用.

ABSTRACT MODELING METHOD OF DIGITAL PROTECTION DELAY

The digital protection relay is a hybrid system which its inputs are continuous variables and its output is discrete event. The paper proposes a novel abstraction hierarchical GHPN modeling method for digital protection relay the continuous dynamic layer of GHPN model describes the continuous variable change of relay, and its logic layer, namely Petri nets, describes the logic dynamic behavior of protection relay. This paper builds the GHPN model of the three zones digital distance relay. To consider the nonlinear of input signals, the transient GHPN model of digital distance relay is also built. The results of simulation showed that the GHPN model of digital distance relay is valid, and can describe the inner dynamic behavior of relay in detail and the interaction between the relay and power systems.