Voltage stability analysis of DC ship power system with pulse load

Xue-ping, Gao; Fu, Lijun; Hu, Jiayue; Yan, Qing-Song

doi:10.1049/joe.2018.9041

Cited by 7 publications

(9 citation statements)

References 9 publications

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“…From this viewpoint, during the entire pulse time, in which case the pulsed loads iteratively charging and discharging, the shipboard power system variables should have a periodic alternating process rather than merely equilibrium points to keep stable. Thus, the system stability can be studied by periodic-orbit stability method and statespace averaging method [89], [90].…”

Section: ) Large-signal Modeling and Stability Analysismentioning

confidence: 99%

A Review of DC Shipboard Microgrids—Part II: Control Architectures, Stability Analysis, and Protection Schemes

Guerrero

Lashab

et al. 2022

IEEE Trans. Power Electron.

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This paper presents a review of coordinated control strategies, stability analysis, and fault management for DC shipboard microgrids (DC-SMGs). As an emerging application, the DC-SMG lacks a comprehensive summary of the control schemes. Considering the specific load profile in ships, this paper discusses the coordinated control strategies of diesel generators and energy storage system (ESS). Depending on the maritime conditions, different operation modes are switched by the energy management system (EMS). Due to the presence of highbandwidth controlled constant power load (CPL) converters, negative impedance instability is induced. Meanwhile, the pulsed loads in DC-SMG may affect the voltage stability significantly. Small-signal and large-signal stability analysis can be used to evaluate the effect of these two types of loads. In the aspect of shipboard protection system, this paper presents the specific requirements of DC-SMG based on the standards. Lacking of 'ground' in ships, solutions in designing the grounding system for DC-SMG is described. Besides, the short-circuit fault management consisting of fault detection, fault isolation, and reconfiguration in DC-SMGs are summarized. Finally, existing commercial DC ships are presented and compared to demonstrate the developing trends.

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Section: ) Large-signal Modeling and Stability Analysismentioning

confidence: 99%

A Review of DC Shipboard Microgrids—Part II: Control Architectures, Stability Analysis, and Protection Schemes

Guerrero

Lashab

et al. 2022

IEEE Trans. Power Electron.

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“…The solid line, dot dash line, dash line, and dot line are respectively corresponding to the multicycle coupling model, switching‐period average model, pulse‐period average model, and state‐space average model. Because the pulse‐period average model only retains its switching period, the period of its periodic orbit is 1 ms, and it is extended to the whole pulse period of 10 ms. For the less studies of this kind of system, the effectiveness of proposed methods is verified by the comparison with the TDSM [15] and state space average model [23].…”

Section: Simulation Analysis Of System Stabilitymentioning

confidence: 99%

“…Aiming at the particular disturbances, the existing literature has made analyses of the stability of the IPS with pulse load by use of the time‐domain simulation method (TDSM) [14–16] or Hamiltonian surface shaping method [17–18]. The disturbance and an inappropriate choice for the time‐domain response observations have a great influence on the results of time‐domain simulation.…”

Section: Introductionmentioning

confidence: 99%

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Stability Analysis of Integrated Power System in Multicycle Dynamic Process

Huang

Wang

Xiao

et al. 2021

IEEJ Transactions Elec Engng

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The integrated power system (IPS) with pulse load involves the dynamic processes of millisecond‐level switching period and second‐level pulse period. The characteristics of this kind of multicycle dynamic process cause much difficulty in analyzing system stability. For this reason, this paper presents a multicycle coupling mathematical model of the IPS with pulse load and proposes an algorithm based on the state variables for analyzing the sensitivity of the preceding switching period which can rapidly and accurately calculate the periodic orbit and stability margin of the system. Considering a little change in the system state variables under small disturbance, this paper uses the pulse‐period average model to simplify the calculation. The simulation analysis shows that the pulse‐period average model has the same stability margin with the multicycle coupling model. The critical pulse power calculated by the above models is 5.5 and 17 kW when the constant power is 20 and 14 kW respectively, which is consistent with the time domain simulation. It may provide technical support for the stability analysis of the IPS with pulse load. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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“…In recent years, studies have shown that the application of hybrid energy storage system (HESS) technology in ship integrated power systems can be compensating for the voltage sag and fluctuation, enhancing the system stability and diminishing the impact of the pulsed load, improve fuel efficiency, reduce environmental pollution and so on [1][2][3]. Realising the reasonable distribution of power can make full use of the advantages of different types of energy storage in terms of energy density and power density [4].…”

Section: Introductionmentioning

confidence: 99%

Decentralised power distribution and SOC management algorithm for the hybrid energy storage of shipboard integrated power system

Lin

Xiao

2020

IET gener. transm. distrib.

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In the medium voltage direct current (MVDC) shipboard grid, the inherent inertial support from the DC capacitors is too small to resist step changes or fluctuations from the high power pulse load and propulsion load, which results in lower DC voltage quality. This study proposes a decentralised control algorithm for the MVDC shipboard hybrid energy storage system (HESS) to enhance the onboard survivability. This algorithm adjusts the droop control coefficient based on the bus voltage change rate adaptively, meanwhile the voltage differential signal processing and filtering are implemented by the trace differentiator. In addition, the proposed algorithm also has state-of-charge (SOC) balancing and SOC recovery abilities between multiple groups of energy storage devices. The parameter selection principle are analysed, and a variety of working conditions are simulated and verified in PSCAD. Theoretical analysis and simulation show that, HESS can achieve good power distribution and SOC management performance without communication compared to fixed droop coefficient control strategies, and the dynamic characteristics of bus voltage have been significantly improved.

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Voltage stability analysis of DC ship power system with pulse load

Cited by 7 publications

References 9 publications

A Review of DC Shipboard Microgrids—Part II: Control Architectures, Stability Analysis, and Protection Schemes

A Review of DC Shipboard Microgrids—Part II: Control Architectures, Stability Analysis, and Protection Schemes

Stability Analysis of Integrated Power System in Multicycle Dynamic Process

Decentralised power distribution and SOC management algorithm for the hybrid energy storage of shipboard integrated power system

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