电力系统及其自动化学报2018，Vol.30Issue(3)：84-90,7.DOI:10.3969/j.issn.1003-8930.2018.03.012
光伏并网系统数字物理混合仿真新方法
Novel Approach of Digital and Physical Hybrid Simulation for Grid-connected PV System
曾杰 1李俊林 2陈迅 1毛承雄 2陈晓科 1冷凤2
作者信息
- 1. 广东电网有限责任公司电力科学研究院,广州510080
- 2. 华中科技大学电气与电子工程学院,武汉430074
- 折叠
摘要
Abstract
A safe and reliable operation of distribution network is increasingly affected by the power generation from new energies,and the defect is more obvious when only a single real-time digital simulation or physical simulation is used to reveal the interaction between distribution network and grid-connected devices.To solve this problem,a novel approach of digital and physical hybrid simulation with the tracking of component in DC voltage is proposed for a grid-connected PV system,which is used to improve the hybrid simulation modeling for grid-connected power generation from new energies and distribution network with distributed generations.By means of establishing a grid-connected PV system model with low voltage ride-through capability,the DC component in output voltage is introduced as a new con-trol object,and an improved inverter control strategy for digital-analog connector is analyzed.In this way,the digital and physical hybrid simulation of grid-connected PV system is realized together with the tracking of component in DC voltage,which can ensure that there is no DC component in the output voltage from the digital-analog connector under a stable operation condition,while the acyclic voltage appearing in grid under a fault condition can be retained.The ef-fectiveness of this model for grid-connected PV generation is verified by simulations conducted in a PSCAD/EMTDC platform.关键词
数字物理混合仿真/光伏/低电压穿越/负序电流补偿/直流分量Key words
digital and physical hybrid simulation/PV/low voltage ride-through/negative sequence current compensa-tion/DC component分类
信息技术与安全科学引用本文复制引用
曾杰,李俊林,陈迅,毛承雄,陈晓科,冷凤..光伏并网系统数字物理混合仿真新方法[J].电力系统及其自动化学报,2018,30(3):84-90,7.
