摘要
光伏系统与常规电源的发电特点不同,使得大型光伏电站与配电网互联的研究变得复杂和困难。本文基于PSCAD/EMTDC仿真平台,从光伏电站和配电网的特性出发,建立了含MPPT的实用光伏方阵仿真模型和含集中式光伏电站的配电网仿真模型,又以配电网中接入点母线电压暂态为考虑因素,就光伏电站接入电网的选点问题进行了仿真研究。仿真结果表明,光伏电站接入选点时配电网络的短路容量、负荷水平对配网电压暂态有较大的影响,而配电网络的R/X比和接入点母线电压等级对配网电压暂态的影响相对较小。
As photovoltaic（PV） systems′characteristics are different from that of regular power generations,the situation of a large-scale PV station interconnecting with distribution network is special and complicated.Based on PV plant and distribution′s characteristics,the simulation models of a PV system include maximum power point tracking（MPPT） and a distribution network with large-scale PV plant are built in PSACD/EMTDC.Considering the voltage transient of access points that PV plants connect to DN,simulations are performed to optimize the placement of access points.The simulation results show that the short-circuit capacity and load level of distribution have a great impact on voltage transient in distribution,while the effects of R/X ratio of distribution and voltage class of access point are relatively small.
出处
《高压电器》
CAS
CSCD
北大核心
2010年第12期54-58,共5页
High Voltage Apparatus
