For the privacy concern, the data exchange between the electricity network and the natural gas network is not always possible. It brings challenges for the co-operation of electricity–gas systems. This paper proposes a static equivalent model that replaces the natural gas network, which lays the foundation for electricity–gas co-operation between separate electricity and gas companies. The influence of the natural gas network on the electricity network is represented in this equivalent model, which consists of a constraint equivalent model and a loss equivalent model. In the constraint equivalent model, a set of optimization models is formulated to approximate the feasible region of natural gas-fired units (NGUs) imposed by the operational constraints of the natural gas network. In the loss equivalent model, the natural gas consumption of compressors contributed by NGUs is considered based on the “shortest path principle” using the gas loss as the weight. The proposed static equivalent model is applied in the optimal power flow of electricity–gas systems. Case studies demonstrate the desired accuracy of the proposed method.

中文翻译：

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用于燃气-燃气协同优化的天然气网络静态当量模型

出于隐私方面的考虑，电网和天然气网络之间的数据交换并不总是可能的。这给电力-燃气系统的合作带来了挑战。本文提出了一种替代天然气网络的静态等效模型，为单独的电力公司与天然气公司之间的电力-天然气合作奠定了基础。该等效模型代表了天然气网络对电网的影响，该模型由约束等效模型和损耗等效模型组成。在约束等效模型中，制定了一组优化模型，以近似由天然气网络的运行约束所施加的天然气燃烧单元（NGU）的可行区域。在损失当量模型中 NGU贡献的压缩机天然气消耗是基于“最短路径原理”，以气体损失为重量。拟议的静态等效模型被应用在电力-燃气系统的最佳潮流中。案例研究证明了所提出方法的所需准确性。