Summary of Research on Multi-infeed Short Circuit Ratio in AC and DC Systems

Chen, Ke; Luo, Jianyu; Zhou, Ting; Luo, Kaiming; Wang, Sicheng; Zang, Dechun

doi:10.1109/ei2.2018.8582516

Cited by 7 publications

(5 citation statements)

References 1 publication

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“…If z ijc = 0, both w ijc and w jic can only be 0, so there is no water flow on the waterway. Equation (19) shows that there is one flow out for the source points in the system, while for the sink points, there is no flow out.…”

Section: Connectivity Constraintsmentioning

confidence: 99%

“…As demonstrated in Figure 3, constraint ( 19) is violated if an island is present, and constraint ( 21) is violated if the independent circle is present. Ultimately, (19) to (21) constitute the connectivity constraints.…”

Section: Connectivity Constraintsmentioning

confidence: 99%

“…Considering the interaction of various DC converter stations in a multi‐infeed DC receiving‐end system, the CIGRE DC Working Group has defined the multi‐infeed short‐circuit ratio (MISCR) [18]. The use of MISCR in AC/DC interconnection systems has been the subject of extensive research [19]. Using sensitivity analysis, [20] verifies the efficacy of MISCR and provides a numerical solution for the critical MISCR.…”

Section: Introductionmentioning

confidence: 99%

“…In [21], the MISCR index is used to evaluate the voltage stability of the converter bus; in [22], a rapid estimation method for the impact of cascaded fault chains in AC systems on DC systems is proposed based on MISCR and converter bus short‐circuit voltage. The simplified calculation formula of MISCR [19] shows that MISCR is closely related to the power network structure (specifically, the system impedance matrix). Similarly, the approximate formula of SCC [23] shows that the SCC level is also closely related to the power network structure.…”

Section: Introductionmentioning

confidence: 99%

See 3 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: Connectivity Constraintsmentioning

confidence: 99%

Section: Connectivity Constraintsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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“…In summary, weak AC power system strength can weaken the system's robustness and stability. Increasing the AC power system strength is beneficial for raising the system's resonant frequency and stability, while achieving the better filtering effects (Chen et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Filtering characteristics of parallel-connected fixed capacitors in LCC-HVDC considering the variations of system strength

Yang,

Zhang,

Zhao

2024

Front. Energy Res.

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The AC power system strength exhibits time-varying characteristics during operation, thereby affecting the filtering performance of filters in the system. Failure to account for this variability may result in the harmonic levels exceeding permissible limits under specific power system strength, thereby affecting the normal operation of the power system. Consequently, building upon the existing filtering technique based on parallel-connected fixed capacitors for LCC-HVDC systems, a method for tuning the parameters of parallel-connected capacitors is proposed, thereby the capacitance range meets the filtering requirements under various system strengths.

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Steady-state impedance mapping in grids with power electronics: What is grid strength in modern power systems?

Gomis‐Bellmunt

Song

Cheah-Mañé

et al. 2022

International Journal of Electrical Power & Energy Systems

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Summary of Research on Multi-infeed Short Circuit Ratio in AC and DC Systems

Cited by 7 publications

References 1 publication

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

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

Filtering characteristics of parallel-connected fixed capacitors in LCC-HVDC considering the variations of system strength

Steady-state impedance mapping in grids with power electronics: What is grid strength in modern power systems?

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