基于时序运行模拟的电网运营效率评估方法

电网运营效率体现了电网运营的精益化水平，对于电网企业的经营效益具有重要影响。对面向未来电网规划方案的电网运营效率进行科学评估对电网建设具有重要的指导意义。该文从发电侧与输电侧2个角度出发，设计了电网运营效率评价指标集。基于电力系统时序运行模拟技术，提出了电网运营效率评价指标的计算方法，能够充分考虑电力系统运行的复杂边界条件以及多种运行场景，全面准确地反映电力系统的运营效率。采用江苏电网2018年的规划方案实际数据进行了实证分析，研究了晋北--南京特高压直流工程以及江苏千万kW级风电基地对电网运营效率的影响。结果表明，晋北直流的建设会在一定程度上增加系统网损和输电阻塞，对运营效率有一定负面影响，风电间歇性也会增加与风电距离较近的线路阻塞进而降低电网运营效率。

Operation Efficiency Assessment Approach for Power Grid Based on Sequential Operation Simulation

The operation efficiency of power grid reflects the fine level of power system operation, which has significant influence on the revenue of power grid enterprises. The scientific evaluation on the operation efficiency of future-proofed power grid planning scheme provides significant guidance for the construction of power grid. The evaluation index set of power grid operation efficiency was designed from two aspects: generation and transmission. The calculation method for the evaluation index of power grid operation efficiency was proposed based on the sequential operation simulation technology of power system, which could fully consider the complex boundary conditions and various operating scenarios of power system operation, and comprehensively accurately reflect the operation efficiency of power system. The empirical analysis was carried out on the actual data of Jiangsu power grid planning scheme in 2018, and the impacts of Jinbei-Nanjing UHVDC project and 10 GW wind power base in Jiangsu province on the operation efficiency of power grid were studied. The results show that the construction of Jinbei-Nanjing DC project will increase the network loss and transmission congestion of the power system to some extent, and have a negative effect on the operation efficiency. The integration of wind power will increase the line blocking near the wind farm and thus reduce the operation efficiency of power grid.