电力系统线性化模型研究综述与改进

发布时间：2018-06-11 19:48

本文选题：线性化 + 潮流　；参考：《电网技术》2017年09期

【摘要】：电力系统潮流和最优潮流是典型的非线性计算,需要处理复杂的非线性方程,因此计算量大,求解效率低,且在大电网运行分析领域易出现不收敛情况。线性化模型可以解决上述问题,直流模型是目前应用最广泛的线性化模型,计算速度快,但是计算精度相对较低。基于此,以热启动和冷启动环境为基准,首先对目前比较典型的5种线性化模型进行综述,然后提出一种可以求解更完备潮流信息的线路解耦等值线性化模型。文章首先对5种线性化模型分别进行潮流计算和最优潮流计算,并分别与交流模型计算结果进行对比,从理论和仿真2个角度探讨了各线性化模型的优缺点以及适用场景,验证了所提模型在潮流计算以及最优潮流计算中均具有较高的计算精度,求解效率高,且能够计算更完备的潮流信息,综合表现强于其他线性化模型。
[Abstract]:Power flow and optimal power flow in power system are typical nonlinear calculations, which need to deal with complex nonlinear equations. Therefore, power flow and optimal power flow have the advantages of large computational complexity, low efficiency and non-convergence in the field of large power network operation analysis. The linearization model can solve the above problems. The DC model is the most widely used linearization model at present. The calculation speed is fast, but the calculation accuracy is relatively low. Based on this, based on hot start and cold start environment, five typical linearization models are reviewed firstly, and then a line decoupling equivalent linearization model which can solve more complete power flow information is proposed. In this paper, five linearized models are calculated by power flow calculation and optimal power flow calculation respectively, and the results are compared with those of AC model, and the advantages and disadvantages of each linearization model and its applicable scenarios are discussed from two aspects of theory and simulation. It is verified that the proposed model has higher accuracy in power flow calculation as well as optimal power flow calculation. The proposed model is more efficient and can calculate more complete power flow information, which is better than other linearized models.
【作者单位】：河海大学能源与电气学院;国网江苏省电力公司电力科学研究院;国网江苏省电力公司检修分公司;
【基金】：国家自然科学基金项目(51277052) 国家电网公司科技项目(J2017047)~~
【分类号】：TM744

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