arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1904.03030math.OC
收藏

低惯量电网随机机组组合

Stochastic Unit Commitment in Low-Inertia Grids

Matthieu Paturet, Uros Markovic, Stefanos Delikaraoglou, Evangelos Vrettos, Petros Aristidou, Gabriela Hug

摘要:

本文研究了具有低转动惯量的电力网络中的机组组合问题。与频率相关的约束,即频率变化率(RoCoF),频率最低点和稳态频率误差的限制,来自一个统一的系统频率响应模型,并包括到一个随机UC帐户的风力发电和设备的意外不确定性,使用二叉树的方法。与线性RoCoF和稳态频率误差约束相比,最低点约束是高度非线性的。为了保持混合整数线性制定的随机UC模型,我们提出了一种计算效率高的方法,允许重铸的最低点约束,通过引入适当的界限上的相关决策变量的UC模型。对于中等规模的网络,这种方法被证明是计算更有效的分段线性化方法改编自文献。改进的IEEE RTS-96系统的仿真结果表明,包括惯性相关的约束显着影响UC的决定,并增加了总成本,因为更多的同步机被迫在线提供惯性响应。

英文摘要:

In this paper, the Unit Commitment (UC) problem in a power network with low levels of rotational inertia is studied. Frequency-related constraints, namely the limitation on Rate-of-Change-of-Frequency (RoCoF), frequency nadir and steady-state frequency error, are derived from a uniform system frequency response model and included into a stochastic UC that accounts for wind power and equipment contingency uncertainties using a scenario-tree approach. In contrast to the linear RoCoF and steady-state frequency error constraints, the nadir constraint is highly nonlinear. To preserve the mixed-integer linear formulation of the stochastic UC model, we propose a computationally efficient approach that allows to recast the nadir constraint by introducing appropriate bounds on relevant decision variables of the UC model. For medium-sized networks, this method is shown to be computationally more efficient than a piece-wise linearization method adapted from the literature. Simulation results for a modified IEEE RTS-96 system revealed that the inclusion of inertia-related constraints significantly influences the UC decisions and increases total costs, as more synchronous machines are forced to be online to provide inertial response.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑