应用Petri网的含光伏接入微网优化调度方法

Optimized Scheduling of Photovoltaic-integrated Microgrids Using Petri Nets

常规的含光伏接入微网优化调度方法多数采用XGBoost原理设计而成,适用范围有限,在微网能量调度中,其调度质量及效率得不到显著提升,导致调度后部分微网节点电压越限值达不到上下限值,降低了微网电压合格率,增加了网损。基于此,引入Petri网,提出了一种全新的微网优化调度方法。首先,建立含光伏接入微网模型,获取微网的动态变化特征以及固有特性。其次,利用Petri网,表述微网内部各分布式单元运行模态的变化情况,调度微网能量。在此基础上,设定微网有功优化调度交互功率约束条件,进行含光伏接入微网有功优化调度。实验分析可知,应用新的微网优化调度方法后,微网节点电压越限值始终在电压越限允许上下限值范围内变化,未超出限值范围,提高了电压合格率的同时降低了网损。

Most conventional optimized scheduling methods for PV-integrated microgrids are designed based on XGBoost principle and limited in applicability,as the scheduling quality and efficiency are insufficient,resulting in some microgrid nodes'voltage exceeding the limit and not reaching upper and lower limits after scheduling,and consequently low qualification rate microgrid voltage and increased losses.In view of this a new microgrid optimization scheduling method is proposed by introducing Petri nets.First PV-integrated microgrid is modeled and dynamic changes and inherent characteristics of microgrid are obtained.Second changes in operating modes of various distributed units within the microgrid are described using Petri nets to help schedule microgrid energy.On that basis,interactive power constraint conditions for microgrid active power optimized scheduling are determined.The application of the proposed scheduling method is proved by experiments capable of achieving satisfactory restraint of microgrid node voltage values within acceptable upper and lower limits,thus improving voltage qualification rate and reducing network losses.