光伏电站机电暂态实用化等值建模方法  

Practical Equivalent Modeling Method of Photovoltaic Power Station in Electromechanical Transient Simulation

作　　者：高剑[1] 毕悦 杨亚兰 张梅[3] GAO Jian;BI Yue;YANG Ya-lan;ZHANG Mei(State Grid Sichuan Electrical Power Company, Chengdu 610041, China;Sichuan Electric Power Engineering Branch of State Grid Sichuan Comprehensive Energy Service Co., Ltd., Chengdu 610072, China;China Electric Power Research Institute, Beijing 100192, China)

机构地区：[1]国网四川省电力公司调度控制中心,成都610041 [2]国网四川综合能源服务有限公司四川电力工程分公司,成都610072 [3]中国电力科学研究院,北京100192

出　　处：《科学技术与工程》2022年第2期556-562,共7页Science Technology and Engineering

基　　金：国家电网有限公司总部科技项目(5100-202040460A-0-0-00);四川省科技计划项目(21ZDYF3319)。

摘　　要：为兼顾光伏电站实际运行特性及大电网全域仿真压力,同时考虑场站级建模实际成本及工程推广,提出了一种光伏电站机电暂态实用化等值建模方法。首先基于光伏电站有功功率控制及逆变器低电压穿越试验实测数据,利用最小二乘估计法辨识得到符合实际特性的光伏发电单元关键参数,并在此基础上考虑集电线路等对光伏电站暂态特性的影响,依据光伏电站整场实际运行情况搭建完成场站级详细机电暂态模型;然后基于综合距离指标实现扰动情况下对各光伏方阵的分群聚类,并根据分群结果利用等值前后并网点输出功率不变原则求取集电线路等值参数,由此完成场站级等值模型搭建。最后仿真对比某实际光伏电站等值模型及详细模型运行特性。结果表明所提机电暂态等值建模方法具有较好的准确性和工程实用性。In order to consider the actual operating characteristics of photovoltaic power plants and the global simulation pressure of large power grids,while taking into account of the actual cost of station-level modeling and engineering popularization,a practical equivalent modeling method for electromechanical transients of photovoltaic power plants was proposed.First,based on the test data of PV power plant active power control and PV inverter's low voltage ride through,the least square estimation method was used to identify the key parameters which conformed to actual characteristics of the photovoltaic power generation unit.On this basis,the influence of collector lines on the transient characteristics of photovoltaic power station was considered,and according to the actual operation of the whole photovoltaic power station,a detailed station-level electromechanical transient model was built,and the comprehensive distance index was used to complete the clustering of the photovoltaic arrays when disturbance occurred.Besides,according to clustering results,the equivalent parameters of the collection line were obtained by using the principle of constant output power of the grid points before and after the equivalent.Thus,the station equivalent model had been built.Finally,both of the equivalent model and detailed model's operating characteristics in an actual photovoltaic power station were simulated.The results of comparison show that the proposed equivalent modeling method has a good accuracy and engineering practicability.

关 键 词：光伏电站 机电暂态 等值建模 实用化方法 

分 类 号：TM743[电气工程—电力系统及自动化]