Unbalanced Voltage Suppression in a Bipolar DC Distribution Network Based on DC Electric Springs

Liao, Jianquan; Zhou, Niancheng; Huang, Yuansheng; Wang, Qianggang

doi:10.1109/tsg.2019.2941874

Cited by 41 publications

(15 citation statements)

References 33 publications

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“…Therefore, the voltage in pole ′′ m ′′ is restored to its nominal values. Applying Laplace transform to (15), it is expressed as…”

Section: ) Design Of Washout Filter-based Controller For Voltage Regu...mentioning

confidence: 99%

“…It is worth mentioning that this voltage discrepancy in the main busbar is caused due to the insignificant voltage drop on the DC distribution line. This is because the proposed method is a source supply-side method and unlike the load-side methods which use additional devices [15], does not have direct access to control the main busbar. Furthermore, Figures 6b and 6c show the output current of the upper and lower terminals of sources, respectively.…”

Section: Performance Assessmentmentioning

confidence: 99%

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A resilient bi‐level control strategy for power sharing and voltage balancing in bipolar DC microgrids

Babazadeh-Dizaji

Hamzeh

Dehkordi

2022

IET Generation Trans & Dist

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In the three‐level DC‐DC converter‐based bipolar DC microgrids, accurate power sharing among distributed generators and voltage balancing between the positive and negative poles are two main control objectives. This article presents a resilient bi‐level control strategy which simultaneously satisfies both aforementioned objectives. The proposed control structure is a combination of a distributed consensus‐based cooperative method and a washout filter‐based method. In the first level, a distributed consensus‐based cooperative control method with considering time delays and communication noises is developed to realize proportional power sharing. At this level, DGs operate collaboratively using only neighbour‐to‐neighbour feedback over a sparse communication network, even if the communication network is susceptible to additive noise and time delay. In the second level, a decentralized control method is employed to restore the voltage of each pole of a bipolar DC microgrid to the desired value. The second level, which works without any communication links and additional control loops, utilizes a dynamic feedback incorporating washout filters. The whole proposed control strategy is robust against a single point of link‐failure and resilient against the communication time delays and noises as well. Comprehensive simulation studies are carried out in PLECS software to verify the effectiveness of the proposed control scheme.

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“…Therefore, the voltage in pole ′′ m ′′ is restored to its nominal values. Applying Laplace transform to (15), it is expressed as…”

Section: ) Design Of Washout Filter-based Controller For Voltage Regu...mentioning

confidence: 99%

Section: Performance Assessmentmentioning

confidence: 99%

A resilient bi‐level control strategy for power sharing and voltage balancing in bipolar DC microgrids

Babazadeh-Dizaji

Hamzeh

Dehkordi

2022

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

“…Besides the applications of DCES in unipolar DC grids, the unbalanced voltage suppression of the DCES in bipolar DC distribution grids is reported in [65]. In the work, the coupled relationship between the positive-pole and negative-pole voltages are mathematically derived and it is demonstrated that the investigated DCES-integrated bipolar DC grid is a coupled two-input-two-output system.…”

Section: Control and Application Of Multiple Dcesmentioning

confidence: 99%

Electric Spring and Smart Load: Technology, System-Level Impact, and Opportunities

Lee

Liu

Tan

et al. 2021

IEEE J. Emerg. Sel. Topics Power Electron.

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Increasing use of renewable energy sources to combat climate change comes with the challenge of power imbalance and instability issues in emerging power grids. To mitigate power fluctuation arising from the intermittent nature of renewables, electric spring has been proposed as a fast demandside management technology. Since its original conceptualization in 2011, many versions and variants of electric springs have emerged and industrial evaluations have begun. This paper provides an update of existing electric spring topologies, their associated control methodologies, and studies from the device level to the power system level. Future trends of electric springs in large-scale infrastructures are also addressed.

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“…Besides the unipolar DC microgrid, the series ES is also reported in [56] for balancing the voltages in bipolar DC grids. A decoupling controller is designed in [56] to operate two series DC ES in a decoupled way for reducing the neutral current and restoring the voltages.…”

Section: B DC Esmentioning

confidence: 99%

A Review of AC and DC Electric Springs

Wang

et al. 2021

IEEE Access

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The large-scale integration of renewable energy sources in the power system can render instability issues, which degrades the power quality of the voltage supply. To address this issue, the electric springs (ES), which are elastic load demand control technologies, have been reported. Since it was proposed in 2011, many literatures on the applications, circuit topologies, control designs and the stability analysis of the ES have been reported. Based on the reported literatures, a comprehensive review of AC and DC ES technologies has been performed in this paper. The research outcomes are systematically summarized. The trend of the potential development of ES technologies is envisioned. INDEX TERMS Demand-side management, electric springs, power system, smart grid. MINGHAO WANG (Member, IEEE) received the B.Eng. degree (Hons.

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Unbalanced Voltage Suppression in a Bipolar DC Distribution Network Based on DC Electric Springs

Cited by 41 publications

References 33 publications

A resilient bi‐level control strategy for power sharing and voltage balancing in bipolar DC microgrids

A resilient bi‐level control strategy for power sharing and voltage balancing in bipolar DC microgrids

Electric Spring and Smart Load: Technology, System-Level Impact, and Opportunities

A Review of AC and DC Electric Springs

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