Abstract
Today, the power system operation represents a challenge given the security and reliability requirements. Mathematical models are used to represent and solve operational and planning issues related with electric systems. Specifically, the AC optimal power flow (ACOPF) and the DC optimal power flow (DCOPF) are tools used for operational and planning purposes. The DCOPF versions correspond to lineal versions of the ACOPF. This is due to the fact that the power flow solution is often hard to obtain with the ACOPF considering all constraints. However, the simplifications use only active power without considering reactive power, voltage values and losses on transmission lines, which are crucial factors for power system operation, potentially leading to inaccurate results. This paper develops a detailed formulation for both DCOPF and ACOPF with multiple generation sources to provide a 24-h dispatching in order to compare the differences between the solutions with different scenarios under high penetration of wind power. The results indicate the DCOPF inaccuracies with respect to the complete solution provided by the ACOPF.
Highlights
Reducing greenhouse gas emissions is imperative for climate change mitigation, leading to increased investments in reducing conventional fossil fuel-based power generation [1,2,3]
This paper proposes a detailed analysis of power system operation using both AC optimal power flow (ACOPF) and DC optimal power flow (DCOPF) under different conditions to evaluate the changes in reactive power and its effect in the overall dispatching and costs
In order to analyze the sensitivity of power flows to reactive power, a power system case is used to simulate operational conditions
Summary
Reducing greenhouse gas emissions is imperative for climate change mitigation, leading to increased investments in reducing conventional fossil fuel-based power generation [1,2,3]. There are a variety of approaches to find the solution for an OPF, among which the AC optimal power flow (ACOPF) and the DC optimal power flow (DCOPF) stand out. This paper proposes a detailed formulation of the DC and AC optimal power flow with multiple generation sources to provide a 24-h dispatching to meet demand requirements based on [23]. This paper proposes a detailed analysis of power system operation using both ACOPF and DCOPF under different conditions to evaluate the changes in reactive power and its effect in the overall dispatching and costs. The proposed formulation determines the optimal results for all generators, for each case, all of them under different operating conditions and scenarios in order to determine power systems conditions where there are differences between the ACOPF and the DCOPF solution.
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