用于低电压穿越性能评估的光伏降阶解析模型  

Reduced-order analytical model to evaluate photovoltaic low-voltage ride-through performance

作　　者：牛拴保 霍超 陈春萌 柯贤波 王晓辉[3] 张强[3] 陈宁 NIU Shuanbao;HUO Chao;CHEN Chunmeng;KE Xianbo;WANG Xiaohui;ZHANG Qiang;CHEN Ning(Northwest Branch,State Grid Corporation,Xi'an 710048,Shaanxi,China;State Grid Qinghai Electric Power Company,Xining 810008,Qinghai,China;Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education(Shandong University),Jinan 250061,Shandong,China;National Key Laboratory of Operation and Control of Renewable Energy and Energy Storage,China Electric Power Research Institute(Nanjing),Nanjing 210003,Jiangsu,China)

机构地区：[1]国家电网公司西北分部,陕西西安710048 [2]国网青海省电力公司,青海西宁810008 [3]电网智能化调度与控制教育部重点实验室(山东大学),山东济南250061 [4]中国电力科学研究院有限公司(南京)新能源与储能运行控制国家重点实验室,江苏南京210003

出　　处：《山东大学学报（工学版）》2021年第3期91-100,共10页Journal of Shandong University（Engineering Science）

基　　金：国家电网公司科技资助项目(4000-201934198A-0-0-00)。

摘　　要：采取在每个并网单元层面降阶的思路,重点关注决定穿越成败的直流母线电压,提出用于低电压穿越性能评估的光伏降阶解析模型。该模型涵盖光伏低电压穿越的主要动态环节,包含逆变器控制和锁相环的响应环节,同时,考虑光伏发出的无功输出对并网点电压的支撑作用,反映了光伏并网系统对交流系统提供的无功支持。为验证所提出的降阶解析模型,对比了降阶解析结果和PSCAD仿真波形,证明了文中提出的降阶解析模型精度与可行性。A reduced-order analytical model to evaluate the performance of PV in case of low-voltage ride through(LVRT) was proposed based on the idea of order reduction at each unit, focusing on the DC bus voltage which determined the outcome of ride-through. Such a method covered the major factors with regard to PV LVRT, and included the responses by the converter controller and phase-locked loop. Meanwhile, it took the supporting of reactive power outputs from PV on the point of common coupling(PCC) voltage into consideration, so as to reflect that PV provides reactive power support to AC system. To validate the proposed reduced-order analytical model, the comparison with the simulation results derived from PSCAD confirmed its accuracy and feasibility.

关 键 词：降阶模型 动态模型 无功支撑 光伏并网系统 低电压穿越 

分 类 号：TM743[电气工程—电力系统及自动化]