Cooperative ESS management strategy for stable islanded operations in a bipolar-type LVDC system

Byeon, Gilsung; Kim, Seul-Ki; Kim, Jong-Yul; Jeon, Jin-Hong; Kim, Gyeong-Hun

doi:10.1109/sedst.2015.7315223

Cited by 3 publications

(3 citation statements)

References 15 publications

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“…The upper level control function is the supervision of the whole system operation which includes islanding detection and power management. Many islanding detection methods are already developed and can be applied for the bipolar DC distribution system [11][12][13]. In this paper it is assumed that islanding is detected when the system recognizes the AC grid voltage to be zero.…”

Section: System Configurationmentioning

confidence: 99%

A Half-Bridge Voltage Balancer with New Controller for Bipolar DC Distribution Systems

Han

2016

Energies

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This paper proposes a half-bridge voltage balancer with a new controller for bipolar DC distribution systems. The proposed control scheme consists of two cascaded Proportional Integral (PI) controls rather than one PI control for balancing the pole voltage. In order to confirm the excellence of voltage balancing performance, a typical bipolar DC distribution system including a half-bridge voltage balancer with proposed controller was analyzed by computer simulations. Experiments with a scaled prototype were also carried out to confirm the simulation results. The half-bridge voltage balancer with proposed controller shows better performance than the half-bridge voltage balancer with one PI control for balancing the pole voltage.

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Section: System Configurationmentioning

confidence: 99%

A Half-Bridge Voltage Balancer with New Controller for Bipolar DC Distribution Systems

Han

2016

Energies

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“…Without a voltage balancer, the bipolar DC buses cannot be kept at the same voltage level under unbalanced load conditions [7][8][9][10]. Various voltage balancers connected to the AC grid have been studied to solve the above problem.…”

Section: Introductionmentioning

confidence: 99%

“…If there are failures in the grid-tied voltage balancer, the bipolar voltage level cannot be maintained. Therefore, several back-up voltage balancers are required to improve the system reliability [10]. An ESS charger with the bipolar voltage balancing capability has been proposed [11] as a back-up voltage balancer.…”

Section: Introductionmentioning

confidence: 99%

Isolated three-port DC–DC converter employing ESS to obtain voltage balancing capability for bipolar LVDC distribution system

2020

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A bipolar low-voltage DC (LVDC) distribution system used in residential and building applications requires AC-DC converters and voltage balancers that balance the two DC bus polarities. The bipolar DC bus voltage level only relies on the voltage balancer tied with the AC grid. An isolated DC-DC converter for an energy storage system (ESS) with the voltage balancing capability is proposed to prevent the bipolar voltage level collapse caused by the failure of the grid-tied voltage balancer. The proposed converter topology is an enhanced three-port dual-active-bridge (DAB) converter which can balance the bipolar DC voltage level without complex control. Furthermore, it has less current stress in power switches than that of the conventional three-port DAB converter. The effectiveness of the proposed converter is verified with a 3-kW prototype converter.

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Adaptive centralized energy management algorithm for islanded bipolar DC microgrid

Dodda,

Sandepudi

2023

International Journal of Emerging Electric Power Systems

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In this paper, an adaptive centralized energy management algorithm is developed for an islanded bipolar DC microgrid (BDCMG). The proposed microgrid consists of a solar photovoltaic (SPV) system, a wind energy conversion system (WECS), and a battery energy storage system (BESS). The SPV and WECS are operated in maximum power point tracking mode to extract maximum power. The adaptive control algorithm focus on power sharing at a bipolar DC bus based on variations in wind speed, solar irradiance, battery state of charge (SoC), and load. Furthermore, this algorithm maintains voltage balance and voltage regulation on a bipolar DC bus without the use of a communication link and provides effective energy management through coordinated control of renewable energy sources and BESS. The efficacy of the proposed bipolar DC microgrid is simulated and validated on a lab scale prototype to verify its feasibility, and it is observed that the results are found to be satisfactory.

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Cooperative ESS management strategy for stable islanded operations in a bipolar-type LVDC system

Cited by 3 publications

References 15 publications

A Half-Bridge Voltage Balancer with New Controller for Bipolar DC Distribution Systems

A Half-Bridge Voltage Balancer with New Controller for Bipolar DC Distribution Systems

Isolated three-port DC–DC converter employing ESS to obtain voltage balancing capability for bipolar LVDC distribution system

Adaptive centralized energy management algorithm for islanded bipolar DC microgrid

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