CHENG Haozhong,ZHANG Chengming,LIU Lu,et al.Robust Planning Method for Power Generation and Transmission with Renewable Energy Integration Considering Short-circuit Current Limit[J].Automation of Electric Power Systems,2021,45(10):68-76.
CHENG Haozhong,ZHANG Chengming,LIU Lu,et al.Robust Planning Method for Power Generation and Transmission with Renewable Energy Integration Considering Short-circuit Current Limit[J].Automation of Electric Power Systems,2021,45(10):68-76. DOI: 10.7500/AEPS20200825012.
Robust Planning Method for Power Generation and Transmission with Renewable Energy Integration Considering Short-circuit Current Limit
With the increase of power load density and network structure tightness and the uncertainty caused by renewable energy integration
the problem of excessive short-circuit current becomes prominent. This paper proposes a robust planning method for power generation and transmission system that can satisfy the short-circuit current limit with renewable energy integration. Firstly
the calculation method of short-circuit current considering network topology and power supply integration is improved
where network topology optimization and unit startup/shutdown are employed to optimize the short-circuit current level. Secondly
a three-level robust planning model of the generation and transmission system is built by the adaptive polyhedral uncertainty set considering the uncertainty of renewable energy output and
N
-1 random failure. The top level is the planning decision problem with short-circuit constraints
whose goal is to minimize the sum of the annual investment cost of transmission network expansion and power construction as well as the annual operation cost in the worst scenario. At the middle level
the worst-case scenario including the combination of renewable energy output and
N
-1 random failure is found. The lower level is the optimal power flow problem satisfying the operation constraints in uncertain scenarios. Then
the three-level problem is transformed into a bi-level problem by dual transformation and solved by the column-and-constraint algorithm. Finally
the results of IEEE 24-bus system show that the planning scheme can meet the short-circuit current requirements under the uncertainty of renewable energy output.
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