Abstract: In this paper, a novel voltage controller of energy storage system (ESS) in DC microgrids (DC-MG) is proposed to enhance the DC-bus voltage stability. At first, a mathematical model of the DC-MG is developed in a state-space form.
By achieving more stable DC bus voltage and faster response compared to existing methods. The proposed strategy provides considerable benefits for electrifying rural places that do not have access to grid connections, making it a feasible alternative for improving energy stability and sustainability in such areas.
Initially, the DC bus voltage remains stable at 400 V. At 0.75 s, a sudden decrease in PV output power results in a DC bus voltage fluctuation of ∼8.5 V under traditional VDCM control, returning to stability in 0.81 s.
A heterogeneous energy storage system (HESS) is implemented to combat the DC bus voltage instability and power allocation problem caused by high penetration of renewable energy sources (RESs) in a standalone DC microgrid. The HESS comprises a battery and supercapacitor aims to smooth DC bus voltage.
The proposed PMS primary objective is to retain DC bus voltage at 380 V during RESs and load vacillations by employing HESS. Fig. 13 (a) illustrates the voltage of a DC bus over time, with both the reference voltage (dashed green line) and the actual voltage (solid red line) being plotted.
The PV unit connects to the DC bus via a boost converter integrated with a MPPT control strategy. This configuration allows the unit to fully utilize solar energy and ensure that the output power is maximized.
SOC Equalization Control Method Considering SOH in DC–DC …
The DC–DC cascaded energy storage system examined in this study is depicted in Figure 1. Each DC–DC converter is connected to an energy storage battery …
DC Bus Voltage Stabilization and SOC Management …
The algorithm is designed to manage the charge and discharge cycles of the hybrid battery-supercapacitor energy storage system (HBSS), thereby guaranteeing that the state of charge (SOC) for...
Parallel control strategy of energy storage interface converter with ...
When two energy storage converters are used in parallel for an energy storage device operating in the discharge mode, the output power can be distributed as P o1: P o2 = …
Coordinated control strategy of DC microgrid with hybrid energy storage ...
In the experimental platform of the mixed energy storage system, all parameters in the mixed energy storage system will be collected through the strong acquisition …
Coordinated Approach of DC Bus and Battery SoC Signaling for …
The improved control strategy utilizes both DC bus signaling (DBS) and state of charge (SoC)-based droop control strategy to generate appropriate DC link voltage references …
Hybrid energy storage bidirectional DC DC converter based on …
Hybrid energy storage bidirectional DC–DC converter based ... ADRC structure is complex, and many parameters must be tuned. The debugging process is complex in practice. In [28], a …
Improved Virtual DC Machine Control Strategy for BDDC on Energy Storage ...
2.1 DC Machine and BDDC Analogy. Figure 1 shows the circuit diagram of BDDC transformation in Boost mode. Battery output current i b is input to DC bus through DC …
Control strategy to improve load/power sharing, DC bus voltage ...
Along with their advantages, they suffer from an imbalance state of charge (SOC) in their energy storage units (ESUs), improper current-sharing between ESUs, and DC …
Multi‐source PV‐battery DC microgrid operation mode and power ...
The conventional DC bus signaling (DBS) coordination control strategy for islanded DC microgrids (IDCMGs) faces challenges in coordinating multiple distributed …
Integrated control strategy for bus voltage stability and power …
DC-DC Converter: DC-DC managing power between DC sources and loads. They handle the voltage regulation and energy transfer between storage systems (like battery) …
Investment-based optimisation of energy storage design parameters …
In energy system modelling, the optimisation of energy storage parameters is computationally challenging; considering the parameters as independent optimisation variables …
Voltage stability control strategy for DC microgrid based on …
Section III analyzes the dynamic process of the DC bus voltage and proposes a VDCM control strategy with adaptive power distribution parameters. In Sec. IV, a small-signal …
Analysis and Design of DC-Bus Voltage Controller of Energy …
In this paper, a novel voltage controller of energy storage system (ESS) in DC microgrids (DC-MG) is proposed to enhance the DC-bus voltage stability. At first, a mathematical model of the …
Modeling and Simulation of a Hybrid Energy Storage System for DC ...
In regions where the electrical grid is inaccurate, an Energy storage system provides constant electricity, grid stability, and control of frequencies [1, 2].Nowadays, the most …
Automatic SOC Equalization Strategy of Energy Storage Units with DC ...
Dynamic load power sharing method with the elimination of bus voltage deviation for energy storage systems in DC microgrids
Battery‐supercapacitor hybrid energy storage system …
The linear charge/discharge characteristic of the supercapacitor also causes large fluctuation in the DC bus, which may result in poor power quality and system stability. To maintain a relatively stable DC bus voltage, the …
A fast adaptive bus voltage regulation strategy for supercapacitor ...
The power source is connected to a buck-boost converter to supply the DC link. In the supercapacitor energy storage system, the traction, braking and other loads obtain …
Active Disturbance Rejection Control Combined with Improved …
In DC microgrids, a large-capacity hybrid energy storage system (HESS) is introduced to eliminate variable fluctuations of distributed source powers and load powers. …
Control Strategy for Bus Voltage in a Wind–Solar DC Microgrid
In order to solve the problems of poor bus voltage stability and slow system response speed of DC microgrid system caused by a wind turbine and PV power fluctuation …
Voltage Compensation Control and Parameter Adaptive Design …
To enhance the stability of a DC microgrid, a promising approach is to control the energy storage converter via the virtual DC machine control (VDMC), which can improve …
Utility-scale battery energy storage system (BESS)
— Utility-scale battery energy storage system (BESS) ... DC rated voltage 1000 V DC ± 12% DC rack rated current 330 A DC bus rated current 8 x 330 = 2640 A Isc_rack (prospective short …
An Optimal Control Strategy for DC Bus Voltage Regulation in ...
This paper presented an assessment of the optimal control for DC bus voltage regulation by using a voltage-sourced converter (VSC) and a battery energy storage (BES) …
A cooperative control strategy for balancing SoC and power …
A distributed cooperative control scheme for multiple energy storage units in a DC microgrid is proposed to achieve control objectives such as SoC balancing, power sharing …
Voltage stability control strategy for DC microgrid based on …
To enhance the inertia and response speed of the DC bus interface converter, this paper proposes a power allocation parameter adaptive virtual DC motor control strategy …
Parameter-Adaptation-Based Virtual DC Motor Control Method for Energy ...
P. Wang et al.: Parameter-Adaptation-Based VDM Control Method for Energy Storage Converter angularvelocity,J isthemomentofinertia,Disthedamping coef˝cient, CT is the torque coef˝cient of …
Research on Bus Voltage of DC Microgrid Containing Hybrid Energy ...
the DC bus voltage, ensuring the reasonable distribution of power among hybrid energy storage devices, and improving the power quality of the grid-connected side. 2 Materials and Methods …
Fault analysis for DC Bus-integrated energy storage system, …
DC microgrids consist of distributed energy resources (DERs) and loads, e.g., fuel cells, Electric Vehicles (EVs), solar Photovoltaics (PVs), wind power generation, and battery …
Automatic SOC Equalization Strategy of Energy Storage Units with DC ...
In this paper, an improved sag control strategy based on automatic SOC equalization is proposed to solve the problems of slow SOC equalization and excessive bus …
Parameter-Adaptation-Based Virtual DC Motor Control Method for Energy ...
To suppress the influence of power fluctuation in the DC microgrid system, virtual DC motor (VDM) control is applied to the energy storage converter for improving the …
A fast adaptive bus voltage regulation strategy for supercapacitor ...
SHI ET AL. 1191 FIGURE 1 Configuration of supercapacitor energy storage systems theloadisunknownandvariable.Forthebuck-boostconverter, L is the converter inductances, S 1 …
Model-free predictive control of parameter variations in DDWEC …
5 · A typical characteristic of DDWEC is the presence of power fluctuations caused by wave reciprocal motion in the short time domain, as well as alterations in wave amplitude and …