A Unified AC/DC Power Flow Algorithm With DC Distribution
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摘要: 文中提出了增广直角坐标下的交直流潮流模型,并采用牛顿法进行统一求解。该模型可以解决任意拓扑形式的交直流网络潮流问题,适应直流配电网的潮流计算。给出了VSC损耗模型及其具体参数计算方法,考虑了电压下垂控制的先进控制策略。采用了增广直角坐标模型,使得雅克比矩阵非常稀疏,且绝大多数非零元素在迭代过程中保持常数,极大地提高了计算效率。含多个VSC的直流配电网的仿真结果证明了所提出方法的正确性、灵活性和高效性。
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关键词:
- 直流配电网 /
- 交直流系统 /
- 电压源换流器 /
- 增广直角坐标潮流模型 /
- 潮流计算
Abstract: This paper proposed a model to solve the power flow of the most general DC power distribution network: DC grids connected to AC grids via a number of voltage source converters（VSCs）. Comparing to those existing methods, this paper considered all the VSC control strategies, especially the voltage droop control, realizing the combination of VSC control and load flow calculation. It has also given a detailed and specific formula on the VSC losses. Furthermore, by using augmented rectangular load flow model, the Jacobian matrix is much sparser and most elements stay constant during iteration, which results in an obvious improvement of efficiency. This method was proved to be effective and flexible by demonstrations on a general DC distribution test system.-
Keywords:
- DC distribution /
- AC/DC system /
- voltage source converter /
- augmented rectangular model /
- power flow
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