CAJ | 학술논문

为提高直流潮流计算精度，研究了标准直流潮流模型中由于忽略支路电阻而带来的有功平衡问题，给出了按比例调整出力或负荷、引入网损等值负荷模型这2种有功平衡方法。为了使网损等值负荷模型的应用不依赖于交流潮流的收敛性，重点提出一种改进的直流潮流算法，该算法通过网损迭代得到等值负荷的大小，且保留了标准直流潮流求解的便利性和快速性。实际电网算例的计算结果表明，提出的改进直流潮流算法与标准直流潮流算法相比，计算结果的精度大幅提高，在交流潮流不收敛的情况下，可作为一种有效的近似潮流计算方法。
위제고직류조류계산정도，연구료표준직류조류모형중유우홀략지로전조이대래적유공평형문제，급출료안비례조정출력혹부하、인입망손등치부하모형저2충유공평형방법。위료사망손등치부하모형적응용불의뢰우교류조류적수렴성，중점제출일충개진적직류조류산법，해산법통과망손질대득도등치부하적대소，차보류료표준직류조류구해적편리성화쾌속성。실제전망산례적계산결과표명，제출적개진직류조류산법여표준직류조류산법상비，계산결과적정도대폭제고，재교류조류불수렴적정황하，가작위일충유효적근사조류계산방법。
The active power balance problem caused by the network loss in DC power flow algorithm is researched.Two methods are proposed to achieve active power balance,including adj usting the generator output or power load,and adopting equivalent load model.In order to apply this equivalent load model without dependence on convergent initial power flow,a new effective iterative method is also presented to calculate the equivalent loads.The improved DC power flow algorithm proposed retains the linearity and rapidity of the standard DC power flow algorithm,while achieving much higher calculation accuracy. Plenty of actual calculation examples show that the improved DC power flow algorithm is effective and practical,as the power flow result calculated by the improved algorithm is much closer to the actual value than by the standard algorithm.