On the Solution to Optimal Topology Adjustment in Long-Term Power System Operation with Explicit Short-Circuit Current Limitation Constraints

Hua, Haocheng; He, Chuan; Liu, Tianqi; Li, Xuan; Wu, Lei

doi:10.1109/tpwrs.2022.3233760

Cited by 2 publications

(3 citation statements)

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“…Therefore, when i = f, V i,f is the selfimpedance of node f; when i≠f, V i,f is the mutual impedance of node f and node i. Based on the above ideas [24], Formulas (6) to (10) complete the modelling of the node impedance matrix elements.…”

Section: Comprehensive Constraint Set Of Miscr and Sccmentioning

confidence: 99%

“…The numbered set of all DC drop points in the network is designated as N HVDC , whereas the numbered set of all SCC exceeding nodes is designated as N SCC . Combining the expression of node impedance elements obtained from Formulas (6) to (10) and Formulas ( 2) and ( 4), the linear expression of the MISCR and SCC constraints shown in Formulas (11) and ( 12) can be obtained.P * dN,i is the rated delivered power per unit of the DC connected to node i; I limit f ,SCC is the SCC limit of node f. By (11), the MISCR of node f is guaranteed to be greater than 3. By (12), it is guaranteed that the SCC value of node f will not exceed the limit.…”

Section: Comprehensive Constraint Set Of Miscr and Sccmentioning

confidence: 99%

“…Meanwhile, as the size of the AC transmission system increases, the SCC level is incredibly probable to exceed the circuit breaker's capacity, posing a severe risk to the power system's safe operation [4]. Research has shown that the problem of SCC exceeding the limit can be solved through the optimal transmission switch strategy (OTS) [5,6]. OTS has been widely studied in the field of smart grids [7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimal transmission switching strategy for multi‐infeed DC receiving‐end power network to prevent over‐limit of short‐circuit current

Li,

Zhang,

et al. 2023

IET Generation Trans & Dist

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A large‐scale AC/DC hybrid power network has recently been constructed in China because of the fast development of high voltage direct current (HVDC) technology. The receiving AC system must have sufficient system strength to guarantee the safe operation of the DC side. The paradox is that raising the AC side system's strength will increase the short‐circuit current (SCC) level, endangering the safety of the system. In order to resolve the contradiction between the system strength of multi‐infeed DC receiving‐end power networks and SCC, this paper proposes an optimal transmission switching strategy. Firstly, the system strength is characterised by the multi‐infeed short‐circuit ratio (MISCR), followed by constructing a comprehensive constraint set that considers the MISCR and SCC simultaneously. Secondly, to optimize SCC with MISCR and N−1 safety constraints, a mixed integer linear programming model is developed. Finally, to enhance the computing performance for large power systems, a new connectivity constraint set and decision space reduction techniques are provided. The proposed method is tested for effectiveness using the IEEE 30‐bus and IEEE 118‐bus systems.

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Section: Comprehensive Constraint Set Of Miscr and Sccmentioning

confidence: 99%