Research on Microgrid System in the DC-Building

2014 ◽  
Vol 596 ◽  
pp. 678-681
Author(s):  
Ya Ning Yuan ◽  
Ming Meng
Keyword(s):  
Energy Saving ◽  
Control Strategy ◽  
Integrated Management ◽  
Storage System ◽  
Management Strategies ◽  
Electric Energy ◽  
Energy System ◽  
Heat Energy ◽  
High Quality ◽  
Bidirectional Power Flow

In order to achieve the objectives of energy-saving and emission reduction for modern buildings and provide high quality power supply, a DC microgrid system of thermoelectric energy comprehensive control is proposed. The system includes two subsystems of electric energy and heat energy system, and realizes electric and heat energy transformation and combination through cogeneration unit and electronic heating device. To achieve efficient use of energy, integrated management strategies is also proposed. Distributed generations are controlled by the maximum power tracking strategy, and the hybrid energy storage system uses droop control strategy to stabilize DC bus voltage. In the connection point between the grid and microgrid, the bidirectional converter uses vector decoupling control strategy with double closed loop for pulse width modulation (PWM) to solve the problem of bidirectional power flow with the grid. The simulation results indicate that the system can provide high quality, energy saving, stable power for the modern building.

scholarly journals Energy Storage System Control for Energy Management in Advanced Aeronautic Applications

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
A. Cavallo ◽  
G. Canciello ◽  
B. Guida
Keyword(s):  
Energy Management ◽  
High Voltage ◽  
Control Strategy ◽  
Storage System ◽  
Electric Energy ◽  
Gain Control ◽  
Energy Storage System ◽  
High Gain ◽  
System Control ◽  
High Level

In this paper an issue related to electric energy management on board an aircraft is considered. A battery pack is connected to a high-voltage bus through a controlled Battery Charge/Discharge Unit (BCDU) that makes the overall behaviour of the battery “intelligent.” Specifically, when the aeronautic generator feeding the high-voltage bus has enough energy the battery is kept under charge, while if more loads are connected to the bus, so that the overload capacity of the generator is exceeded, the battery “helps” the generator by releasing its stored energy. The core of the application is a robust, supervised control strategy for the BCDU that automatically reverts the flow of power in the battery, when needed. Robustness is guaranteed by a low-level high gain control strategy. Switching from full-charge mode (i.e., when the battery absorbs power from the generator) to generator mode (i.e., when the battery pumps energy on the high-voltage bus) is imposed by a high-level supervisor. Different from previous approaches, mathematical proofs of stability are given for the controlled system. A switching implementation using a finite-time convergent controller is also proposed. The effectiveness of the proposed strategy is shown by detailed simulations in Matlab/Stateflow/SimPowerSystem.

scholarly journals A coordinated control strategy based on Photovoltaic-hybrid energy storage system

2021 ◽  
Vol 261 ◽  
pp. 01012
Author(s):  
Xiaobin Wang ◽  
Hairong Zou
Keyword(s):  
Power Generation ◽  
Control Strategy ◽  
Storage System ◽  
Energy System ◽  
Energy Storage System ◽  
Fast Response ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Micro Grid ◽  
Pv Power Generation

Photovoltaic power generation is changing day by day, but its system has drawbacks. To compensate for the shortcomings of PV power generation system, the micro-grid system of PV power generation with HES is constructed by using the complementary characteristics of battery and supercapacitor. On the basis of this, we introduce a fuzzy control to realize the fast response of hybrid energy system. A micro-grid model is built based on Matlab/Simulink to verify the feasibility and rationality of the proposed control strategy.

scholarly journals Energy Audit and Feasibility of Solar PV Energy System: Case of a Commercial Building

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Sylvester William Chisale ◽  
Patrick Mangani
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Alternative Energy ◽  
Electric Energy ◽  
Energy System ◽  
Observation Data ◽  
Mixed Method Research ◽  
Solar Pv ◽  
Commercial Building ◽  
Energy Audit

Energy situation in Malawi is continuing facing critical challenges to satisfy the existing demand. However, energy consumption and energy conservation studies have been neglected to help overcome this problem. In this paper, electric energy audit was conducted for a commercial building in Mchinji, Malawi, in order to identify energy-saving opportunities. The study employed a mixed method research which involved a series of surveys, observation, data collection, and analysis. The current energy consumption was determined and compared with the proposed energy consumption after replacing some equipment. The proposed system saved up to 33.46% of energy. The study also suggested behavior change towards energy saving. Additionally, an alternative energy system was also suggested. Thus, the HOMER software was employed to design, optimize, and analyze a solar-battery-grid-connected energy system. The proposed system has a simple payback period of 9.8 years. The system’s cost of energy was estimated as 0.0372 $/kWh, and the capital cost was $ 150,887.

Model Based Power-Split and Control for Electric Energy System in a Hybrid Electric Vehicle

2006 ◽  
Author(s):  
Rajneesh Kumar ◽  
Bin Yao
Keyword(s):  
Hybrid Electric Vehicle ◽  
Storage System ◽  
Peak Load ◽  
Electric Energy ◽  
Energy System ◽  
Energy Storage System ◽  
Electric Energy Storage ◽  
Fast Transients ◽  
Hybrid Electric ◽  
Electric Energy Storage System

In this paper, a configuration of electric energy storage system for Hybrid Electric Vehicles has been proposed that consists of a small battery and ultracapacitor pack coupled to the vehicle bus through dc-dc converters. The entire system, together with necessary power electronics pack, has been modeled and a Model Predictive Controller (MPC) has been designed for the purpose of power management of the linearized system. This controller has been simulated with the nonlinear plant for charging and discharging current profiles and is shown to be working well around the equilibrium point of the plant. Results show the effectiveness of this approach in keeping the battery current small and steady during fast transients and peak load conditions.

scholarly journals A Multiport Electric Energy Routing Scheme Applied to Battery Energy Storage System

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Guanglin Sha ◽  
Qing Duan ◽  
Wanxing Sheng ◽  
Aiqiang Pan ◽  
Zhe Liu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Control Strategy ◽  
Reactive Power ◽  
Storage System ◽  
Hierarchical Control ◽  
Electric Energy ◽  
Energy Storage System ◽  
Phase System ◽  
Battery Energy Storage ◽  
Battery Energy

In this paper, the research status of topology and control strategy of energy storage grid-connected system is analyzed, and aiming at the working characteristics of the repurposed battery, a cascade power electronic transformer (CPET) with independent DC output is proposed. The working principle of current fed isolated bidirectional DC-DC converter (CF-IBDC) and cascaded H-bridge (CHB) is analyzed, and the decoupling control strategy is designed. In this paper, a hierarchical control strategy is designed for the repurposed battery energy storage (RBES) grid-connected system based on CPET, which consists of three layers: energy layer, power layer, and state of charge (SOC) layer. The energy layer responds to active and reactive power scheduling instructions, the power layer controls the grid-connected current and tracks the grid voltage, and the SOC layer equates the charged state of repurposed batteries. A 3 MVA/12 kV three-phase grid-connected simulation system was established, and a 1 kW single-phase system experiment platform was designed. The simulation and experimental results can verify the correctness of the theoretical analysis and the feasibility of the control strategy.

Design and Analysis of Energy Storage System Applied to Building Energy Smart Grid Based on Natural Gas Based Distributed Energy System(NDES-SG)

2011 ◽  
Vol 374-377 ◽  
pp. 1119-1126 ◽  
Author(s):  
Hong Qiang Li ◽  
Shu Shuo Kang ◽  
Wen Jing Dong ◽  
Bo Cai ◽  
Guo Qiang Zhang
Keyword(s):  
Energy Storage ◽  
System Design ◽  
Energy Saving ◽  
Storage System ◽  
Energy System ◽  
Energy Storage System ◽  
Building Energy ◽  
Distributed Energy ◽  
Distributed Energy System ◽  
Grid Based

In the early research work,the concept of building energy smart grid based on natural gas based distributed energy system is proposed. For design of energy storage system applied to NDES-SG, basic principles of system design are given which follows energy saving and efficiency increasing in this paper. To interpret integration, energy saving potential and system evaluation method of NDES-SG, Combining with design principles of energy storage system, a simplified typical case system is presented. The influence of energy storage system design on the NDES-SG performance is studied taking ice thermo storage system as an example and system energy saving rate for evaluation criteria. The results show that NDES-SG with a reasonable storage system design can realize energy saving rate approximately 30% compared with NDES-SG without energy storage system. NDES-SG system energy efficiency is further improved.

The Design of On-Board Supercapacitor Energy Storage System of Electric-Car

2012 ◽  
Vol 548 ◽  
pp. 591-594 ◽  
Author(s):  
Rui Lan Wang
Keyword(s):  
Energy Storage ◽  
Power Quality ◽  
Storage System ◽  
Electric Energy ◽  
Clean Energy ◽  
Energy System ◽  
Energy Storage System ◽  
Storage Unit ◽  
Super Capacitor ◽  
Analysis And Design

Electric energy is the most convenient and clean energy sources, and it is used far and wide. While there are many problems of power quality which imperil greatly electronic loads. Modern times, high quality power supply is required by modern manufacturers, and a quick and efficient energy storage technology is now starved for in order to improve and solve the transitory power quality.As a new kind of energy storage component, super capacitors have fast response, high charge-discharge efficiency. This paper focuses on the application background that the super capacitor DC energy storage unit can improve the quality of electric energy, establish a mathematical model of the storage unit, analysis and design the control scheme of super capacitor DC storage energy system, to achieve rapid compensation of the instantaneous power of the system, effectively improving the power quality and stability of the system.

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