CAJ | 학술논문

大型光伏电站的并网将导致配电网谐波呈现出高频次、宽频域等特性，以往被忽视的输电线路分布电容对该类型谐波的影响将十分显著。首先给出光伏电站高低次谐波电流输出特性，建立光伏电站配网基波域数学模型。在此基础上，提出大型光伏电站谐波串并联谐振数学模型，分析谐波串并联谐振的机理，定量分析谐波电压放大系数及谐波电流放大系数与输电距离、谐波次数及谐波类型的关系。按照青海格尔木某50 MVA大型并网光伏电站搭建实例仿真模型，并且对该电站及配网进行数据实测，通过仿真数据及实测数据的对比验证结论的正确性。
대형광복전참적병망장도치배전망해파정현출고빈차、관빈역등특성，이왕피홀시적수전선로분포전용대해류형해파적영향장십분현저。수선급출광복전참고저차해파전류수출특성，건립광복전참배망기파역수학모형。재차기출상，제출대형광복전참해파천병련해진수학모형，분석해파천병련해진적궤리，정량분석해파전압방대계수급해파전류방대계수여수전거리、해파차수급해파류형적관계。안조청해격이목모50 MVA대형병망광복전참탑건실례방진모형，병차대해전참급배망진행수거실측，통과방진수거급실측수거적대비험증결론적정학성。
Grid-connected photovoltaic (PV) power station of large scale may lead to high frequency and wide-band frequency of power system harmonics. The effects caused by distributed capacitance of transmission line which used to be neglected on these harmonics turns to be prominent. Output characteristics of high and low harmonics in PV station were given at first. Mathematic model in fundamental domain of PV station and grid was established. On the basis, series-parallel resonant mathematic model of harmonic was proposed and mechanism was discussed. Meanwhile, relationships among harmonic amplification factor and transmission distance, harmonic order as well as type were analyzed. The simulation model of large-scale PV station was given according to the local PV station in Qinghai province, and real data was measured. The proposed scheme was verified by contrast of simulation data and real data.