Multiple Infeed Short Circuit Ratio &amp;amp;#8211; Aspects Related to Multiple HVDC into One AC Network

Toledo, P.F. de; Bergdahl, B.-G.; Asplund, Gunnar

doi:10.1109/tdc.2005.1546774

Cited by 42 publications

(21 citation statements)

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“…(1) Impact on equivalent active power at coupling point Equivalent active power at coupling point can be calculated according to (5).…”

Section: Miescr Of Hybrid-infeed Systemmentioning

confidence: 99%

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The Principle and Method of Improving Short Circuit Ratio of LCC-HVDC by VSC-HVDC

Zhu¹,

Yuan²,

Sheng³

et al. 2018

dteees

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Abstract. VSC-HVDC has significant impact on LCC-HVDC in hybrid-infeed HVDC system. Based on a hybrid dual-infeed HVDC system, the multi-infeed effective short circuit ratio is deduced which quantitates the improvement effect of VSC-HVDC to LCC-HVDC. Considering both the normal operation target of VSC-HVDC and the transient voltage compensation needed by LCC-HVDC, a control strategy of VSC-HVDC is proposed which can achieve maximum MIESCR.

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“…(1) Impact on equivalent active power at coupling point Equivalent active power at coupling point can be calculated according to (5).…”

Section: Miescr Of Hybrid-infeed Systemmentioning

confidence: 99%

“…There are many references discussing system characteristics with single-infeed or multi-infeed LCC-HVDC [5][6][7] , while very few discussing VSC-HVDC performance in a hybrid power system. A method of evaluation the impact of VSC-HVDC on Effective Short Circuit Ratio (ESCR) in power system through equivalent impedance is proposed in [8].…”

Section: Introductionmentioning

confidence: 99%

The Principle and Method of Improving Short Circuit Ratio of LCC-HVDC by VSC-HVDC

Zhu¹,

Yuan²,

Sheng³

et al. 2018

dteees

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“…There have been two definitions of ESCR proposed for multi-infeed HVDC systems, which consider the influence of adjacent links by weighting their active power injections with corresponding factors. One definition, named as MESCR and showed as (2), is based on the ratio of elements of the node impedance matrix retaining inverter converter ac buses [11], and the other, named as MIESCR and showed as (3), is based on MIIF [3]. In (2),…”

Section: Multi-infeed Hvdc Systemsmentioning

confidence: 99%

“…For multi-infeed HVDC systems, some factors describing the interaction between inverters, such as multi infeed interaction factor (MIIF), are proposed, and then the SCR and ESCR concept applicable to single-infeed HVDC systems is extended to multi-infeed systems based on these interaction factors [3,11]. Parametric study results by the method of maximum power curve (MPC) show that critical values of multi-infeed interactive ESCR (MIESCR) are about 1.5 under various system conditions, which is in accord with the critical value of ESCR in a single-infeed system [12].…”

Section: Introductionmentioning

confidence: 99%

A New Definition of Short-circuit Ratio for Multi-converter HVDC Systems

Liu¹,

Shi²,

Li³

2015

Journal of Electrical Engineering and Technology

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-In this paper, a new definition of short-circuit ratio concept for multi-converter HVDC systems is proposed. Analysis results of voltage interaction between converters show that the reactive power-voltage characteristic of a converter has a dominant effect on voltage interaction level compared with its active power-voltage characteristic. Such a relation between converter reactive power and voltage interaction level supports taking the former into account in the definition of short-circuit ratio concept for multi-converter systems. The proposed definition is verified by the method of maximum power curve for various system configurations. Furthermore, a formula to calculate transient overvoltage for multi-converter systems is derived based on the proposed definition, and the efficiency of the derived formula is verified.

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“…Reference [19] showed that it is effective to use such new index for denoting the voltage stability level of the multi-infeed DC system. Reference [20] predicted the risk for voltage and power instability when the multi-infeed short-circuit ratio is low.…”

Section: Introductionmentioning

confidence: 99%

Coordinated optimization for controlling short circuit current and multi-infeed DC interaction

Yang¹,

Zhao

Liu

2014

J. Mod. Power Syst. Clean Energy

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Due to increased penetration of renewable energies, DC links and other emerging technologies, power system operation and planning have to cope with various uncertainties and risks. In order to solve the problems of exceeding short circuit current and multi-infeed DC interaction, a coordinated optimization method is presented in this paper. Firstly, a branch selection strategy is proposed by analyzing the sensitivity relationship between current limiting measures and the impedance matrix. Secondly, the impact of network structure changes on the multi-infeed DC system is derived. Then the coordinated optimization model is established, which considers the cost and effect of current limiting measures, the tightness of network structure and the voltage support capability of AC system to multiple DCs. Finally, the non-dominated sorting genetic algorithm II combining with the branch selection strategy, is used to find the Pareto optimal schemes. Case studies on a planning power system demonstrated the feasibility and speediness of this method.

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Multiple Infeed Short Circuit Ratio &#8211; Aspects Related to Multiple HVDC into One AC Network

Cited by 42 publications

References 0 publications

The Principle and Method of Improving Short Circuit Ratio of LCC-HVDC by VSC-HVDC

The Principle and Method of Improving Short Circuit Ratio of LCC-HVDC by VSC-HVDC

A New Definition of Short-circuit Ratio for Multi-converter HVDC Systems

Coordinated optimization for controlling short circuit current and multi-infeed DC interaction

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