Chinmayee Biswal
Fault detection technique using time-varying filter-EMD and differential-CUSUM for LVDC microgrid system. S Sarangi, C Biswal, BK Sahu, IS Samanta, PK Rout. Electric Power Systems Research 219, 109254, 2023. 18: 2023: SS Biswal, DR Swain, C Biswal, S Panda, PK Rout.
A Critical Survey on Control Strategies of LVDC Microgrid
Due to increase in use of DERs, a need for LVDC microgrids is emerging. There is a need to reconsider employing DC distribution instead of AC distribution as many of the homes and office equipment like laptops, computers, mobile battery chargers, electronic lights etc., are DC powered. In this case
An improved decentralized control strategy for a PV hybrid
An improved decentralized control strategy for a PV hybrid energy storage system in an LVDC microgrid Jianbiao Li1,2, Yong Chen1,2, Yue Wu3*, Xu Cheng1,2 and Ruixiong Yang1,2 1DC Power Distribution and Consumption Technology Research Center of Guangdong Power Grid Co., Ltd., Zhuhai, China, 2Zhuhai Power Supply Bureau of Guangdong Power Grid Co., Ltd.,
Fault control and line protection strategy for LVDC microgrids
The essence of line protection in LVDC microgrids includes: (1) using additional thyristors in the modified DCSST to avoid the high current flowing through the freewheeling diodes; (2) lowering the critical requirements for fast fault identification and isolation by coordinating the converter control and line protection; (3) tripping the
A Selective Power Droop Control for Hybrid Interlinking
LVDC microgrid is considered as the desired solution against the continuous increase of load demand which is powered by renewable energy sources (RESs) which upholds stability between energy needs
An Enhanced Differential Protection Scheme for LVDC Microgrid
The low-voltage dc (LVDC) microgrid possesses numerous benefits and their penetration in the power system has increased rapidly in recent years. However, the detection of faults in the LVDC microgrid is a challenging issue due to the large magnitude of fault currents and fault-level variation in the microgrid. The performance of the recent current and its
Ground Fault Detection Using Hybrid Method in IT System LVDC Microgrid
The LVDC microgrid was modeled and simulated using power systems computer-aided design (PSCAD). In addition, the proposed hybrid method was implemented using MATLAB''s wave menu, a script m-file
Ground Fault Detection Using Hybrid Method in IT
The LVDC microgrid was modeled and simulated using power systems computer-aided design (PSCAD). In addition, the proposed hybrid method was implemented using MATLAB''s wave menu, a script m-file
Design and Control of DC–DC Converters in a PV-Based LVDC Microgrid
The primary concerns in designing and control of LVDC microgrid involve: (a) choice of suitable converter, (b) extraction of maximum power from RES, (c) voltage regulation and (d) power sharing among various sources and loads [7, 8]. The output power of PV is intermittent in nature and is affected due to change in climatic conditions.
Kernel-based cumulative sum and differential cumulative sum
The utilization of LVDC-MGs plays a pivotal role in significantly mitigating losses linked to power electronics converters. As cited in [3], these microgrids offer many advantages, including increased power transmission capability, economic efficiency, enhanced robustness, and higher electrical power quality.The implementation of LVDC-MGs in residential and
An optimal configuration method of DC reactor in LVDC microgrid
(DOI: 10.1049/icp.2022.1419) Short-circuit fault has a great impact on the safety of LVDC microgrids. In order to avoid damage to the DC equipment within microgrid, DC reactors need to be deployed to limit the fault current. This paper proposes an optimal configuration scheme of reactors based on the analytical solution of fault current. Firstly, the equivalent models of the
A Unified Control Scheme for a Standalone Solar-PV Low
This paper proposes a combined adaptive droop-based load sharing, maximum power point tracking (MPPT), and energy management of photovoltaic (PV)-based dc microgrid system. A proportional droop index (PDI) algorithm is introduced, which is a function of normalized current sharing difference and voltage deviation at the output side of the converter. The proposed
LVDC Microgrids for Power Sharing in Energy Community
The scheme of this architecture is depicted in Fig.1 2) Low Voltage DC (LVDC) microgrid: in this case, the renewable energy source output converter is a Buck-Boost dc/dc and the bus connecting
Protection of LVDC Microgrids in Grid-Connected and Islanded
Low-voltage dc (LVdc) microgrids facilitate the integration of renewable energy systems and modern loads. However, they suffer from the lack of a sensitive, selective, reliable, and fast protection strategy. The low fault current of high-resistance faults makes fault detection and faulty zone identification challenging tasks for protection engineers. This article proposes
Technical Application Papers No.14 Faults in LVDC
4 Faults in LVDC microgrids with front-end converters Introduction Figure I.3 – DC positive pole ground fault current path in an active LVDC microgrid with the neutral point of the MV/LV transformer grounded Figure I.2 – DC short circuit current components in an active LVDC microgrid If, on the other hand, the fault is on the DC side, fault
Mikko Heinonen COMPARISON OF LVAC AND LVDC
3 LVAC AND LVDC MICROGRIDS 15 3.1 LVAC MG advantages and disadvantages 15 3.2 LVDC MG advantages and disadvantages 16 3.3 Energy efficiency and savings of LVDC technology compared to LVAC technology in microgrids according to literature 18 3.3.1 Power electronics and power conversion 19
Selection of LVDC Microgrid Component for Efficient Microgrid
The LVDC distribution has piqued academic interest due to expansion in power electronics technologies. The use of converters, however, has created many technical problems for their protection and control in the case of a failure under improper circumstances. In converter-fed systems, after-the-fault conduct LVDC distribution protection is much different and more
Africa''s Largest Mini-Grid to Provide Affordable and
Over 28,000 households and businesses in eastern Democratic Republic of Congo will have access to affordable and reliable electricity; The project showcases how several parts of the World Bank Group innovated to
DC Microgrid
An overview of DC–DC converter topologies for fuel cell-ultracapacitor hybrid distribution system. O.A. Ahmed, J.A.M Bleijs, in Renewable and Sustainable Energy Reviews, 2015 Abstract. DC microgrids have recently attracted research interest. A DC microgrid is composed of different dispatchable and non-dispatchable power generators and energy buffers, such as fuel cells
DR Congo
DR Congo. Home » Countries » DR Congo. Round. 3rd Round. Partner. Ministry of Energy. Project Budget. $908,716. Estimated Co-Financing. $20,500,000. View all countries Scaling up renewable energy minigrids for people and planet.
Design and Control of DC–DC Converters in a PV-Based LVDC Microgrid
Request PDF | Design and Control of DC–DC Converters in a PV-Based LVDC Microgrid | Over the last decade, power generation using renewable energy resources has gained noteworthy limelight due to
Synchronverter-Enabled DC Power Sharing Approach for LVDC Microgrids
This paper presents a study on power sharing in microgrids using non-ideal unidirectional boost converters. The proposed system employs non-fossil fuel energy source such as wind, solar, and
Protection of low voltage DC microgrids: A review
Another fault location technique for an LVDC microgrid PPU is presented in [106]. Unlike the approach in [105], it uses an attenuation constant of the damped probe current response. Faults close to the PPU are detected with the help of external resistance and inductance, which corresponds to about 0.5 km length of the cable. The fault distance
LVDC Microgrids for Power Sharing in Energy Community
In recent years the development of the LVDC distribution networks is under consideration. DC electrical distribution offers several advantages compared to AC in many applications, in particular in the presence of distributed generation and energy storage systems like high efficacy, flexibility and simple integrated to renewable sources. The DC distribution allows to integrate in a more
Control Architectures for Low Voltage DC (LVDC) Microgrid
This paper addresses the (model-free) data-driven control of power converters, acting as distributed generators, in low voltage direct current (LVDC) networks (e.g. DC microgrids, DC distributed
MPC-based control for a stand-alone LVDC microgrid for rural
The considered stand-alone DC microgrid and corresponding control structure is presented in Section 2, with details on system topology, loads, and PV and ESS selection and sizing.Section 3 reports: (a) the models used for system simulations, (b) the MPC control design, including model selection and optimization problem formulation, and (c) the definition of
Residual-based Short-Circuit fault detection and isolation in LVDC
Designing protection for a DC microgrid is challenging due to its DC nature and heavily capacitor-dominated DC bus that induces high amplitude current spike during short-circuit faults. Moreover, for small-scale applications such as residential DC microgrids, low line-resistance cables increase the fault detection time constraint.
Protection in DC microgrids: a comparative review
In [], a Z-source DC CB was applied to the DC microgrid, which isolated the faulty section quickly, and can clear the fault in LVDC and MVDC microgrids. 6.3 Switches Compared with the CBs, switches can interrupt the fault within several microseconds, and they can detect over current and limit the current to a constant value or force the current
Current-Source Solid-State DC Transformer Integrating LVDC Microgrid
Solid-state DC transformer to integrate low-voltage DC (LVDC) microgrid, wind turbine (WT) generator, photovoltaic (PV), and energy storage (ES) into medium-voltage (MV) direct-current (MVDC