Security analysis of interconnected AC/DC systems

Eriksson, Robert

doi:10.1109/aupec.2015.7324794

Cited by 7 publications

(2 citation statements)

References 14 publications

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“…In [23], another PTDF-based model of an MTdc grid is proposed so that that model can be added to existing dc-based PCM model of conventional ac grids. Similarly, the work in [24] proposes a PTDF-based formulation for an MTdc grid to minimize line violations following an converter outage. However, in both works, the losses of MTdc converter stations and dc lines are not included.…”

Section: B Literature Review and Research Gaps On Mtdc Transmission M...mentioning

confidence: 99%

Benefits of Multi-Terminal HVdc Under Extreme Conditions via Production Cost Modeling Analyses

Nguyen,

Li,

Etingov

et al. 2024

IEEE Open J. Power Energy

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System operators rely on system flexibility to handle unexpected reliability and resilience events, ranging from excessive resource forecast errors to extreme events like heatwaves, earthquakes, and cyberattacks. This paper provides a production cost modeling (PCM) methodology to quantify contributions to system flexibility and economic benefits by controllable HVdc and multi-terminal HVdc (MTdc) transmission systems. First, the PCM model of a general MTdc grid is developed to be seamlessly added to existing scalable PCM model of an ac power system. Second, a method for modeling extreme operating conditions, including heatwave and wildfire, in PCM is presented. Finally, the planning 2030 Western Electricity Coordinating Council (WECC) system is used as an example to demonstrate the benefits of existing and future dc lines in point-to-point, radial, and meshed configurations. Under extreme system conditions including heatwave and wildfire, it is identified from the PCM simulation results that HVdc and MTdc transmission flexibility can provide substantial economic, reliability, and environmental benefits. These benefits include reductions up to 6.4% total generation cost, 8.6% unserved load, 50.3% renewable curtailment, 75% locational marginal price, and 4.0% CO2 emission amount.

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Section: B Literature Review and Research Gaps On Mtdc Transmission M...mentioning

confidence: 99%

Benefits of Multi-Terminal HVdc Under Extreme Conditions via Production Cost Modeling Analyses

Nguyen,

Li,

Etingov

et al. 2024

IEEE Open J. Power Energy

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show abstract

“…However, due to the large-scale power grid and too many optimization factors, this kind of method cannot be applied in real-time control because of the complicated calculation process. Therefore, a more direct calculation method is proposed for real-time control in [20]. In this paper, active power sensitivity is used to calculate the redistribution of DC unbalanced power after DC fault.…”

Section: Introductionmentioning

confidence: 99%

Coordinated Control Strategy of CU-MTDC under Abnormal Conditions Considering Power Supply Security

Wang

Liang

et al. 2021

Applied Sciences

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The coastal urban multi-terminal DC (CU-MTDC) is a prospective solution for enhancing the power supply security of the coastal urban power (CUP) grid and integrating the large-scale offshore wind farm. However, the large DC disturbances may significantly impact the CUP power supply security. The existing DC unbalanced power distribution methods are difficult to be applied in the CU-MTDC because of the complicated optimization process and the expansion of the influence range of a DC fault. To solve the above problems, this paper proposes a coordinated control strategy of CU-MTDC under abnormal conditions. First, calculation principles for the active power reference of center coastal urban power (CCUP) grid converters are proposed. Second, a DC unbalanced power coordinated distribution strategy under abnormal conditions is used based on the dynamic priority control to ensure power supply security of the critical AC lines. Third, the controller parameters of CCUP grid converters are calculated. Through a simple control process, the number of the regulation converters is dynamically scheduled according to the DC unbalanced power. The DC fault influence range on the urban power grid can be limited in a sufficiently small area. Simulation verified the effectiveness of the proposed control strategy.

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A novel sensitivity analysis for optimal design of superconductive fault current limiter in microgrids

2020

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Security analysis of interconnected AC/DC systems

Cited by 7 publications

References 14 publications

Benefits of Multi-Terminal HVdc Under Extreme Conditions via Production Cost Modeling Analyses

Benefits of Multi-Terminal HVdc Under Extreme Conditions via Production Cost Modeling Analyses

Coordinated Control Strategy of CU-MTDC under Abnormal Conditions Considering Power Supply Security

A novel sensitivity analysis for optimal design of superconductive fault current limiter in microgrids

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