中文摘要：

作为售电侧改革的重要部分,开展大用户直购电具有重要的意义。随着大规模新能源接入电网,大用户直购电对含大规模风光的电力系统调度运行的影响亟待研究。首先,以系统综合运行效益最优为目标建立了含大用户直购电的风光电力系统调度模型。其次,提出了直购电机组完成直购电电量的3种不同方式,并将其转化为直购电电力电量约束条件加入模型中,同时选取调峰能力和经济性不同的机组参与直购电,来分析不同大用户直购电模式下,直购电机组特性和直购电量对新能源消纳的影响。最后,采用某省算例分析验证了模型的正确性和有效性,并对大用户直购电模式下提高风光消纳率提出了措施和建议。

英文摘要：

As an important part of innovation in electric power market,it is of great significance to develop direct power purchase by large consumers. With the integration of new energy in grid,the impact of direct power purchase by large consumers on the dispatching operation of large wind-photovoltaic power system is needed to be studied urgently. Firstly,this paper establishes the wind-photovoltaic power system scheduling model with direct power purchase by large consumers,taking the optimal operation efficiency of the system as the target. Secondly, this paper proposes three electricity decomposition methods of direct power purchase by large consumers,and transfers them into different electricity power constraints of direct power purchase in this model. In addition,this paper selects units with different peak regulation and economic capacity to participate in direct power purchase,in order to analyze the impacts of the characteristics of direct power purchase units and the amount of direct power purchase on the new energy consumption. Finally,the correctness and effectiveness of the model are verified by the example analysis in a province,and some suggestions are proposed for improving the wind-photovoltaic power consumption under the mode of direct power purchase by large consumers.