Abstract
The DC power flow(DCPF) method greatly simplifies the process of power flow calculation compared with the AC power flow(ACPF) method. However, when the DCPF method is applied in the larger power system, its calculation deviation will be larger due to a mass of total active power loss of the system. It will be difficult to meet the requirements of the actual applications in the grid. By using ACPF as the measured values, a DC state estimation method is proposed here to correct the parameter of the DCPF model. The case study in the actual grid proves that this method can significantly relieve the calculating deviation of the DCPF method. Meanwhile, the method can effectively improve the calculation speed and better meet the accuracy requirements of practical grid applications.
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