scholarly journals Review of modeling and control strategy of thermostatically controlled loads for virtual energy storage system

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Kang Xie ◽  
Hongxun Hui ◽  
Yi Ding
Keyword(s):  
Energy Storage ◽  
Power Systems ◽  
Control Strategies ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Energy Storage System ◽  
Voltage Regulation ◽  
Modeling And Control ◽  
Thermostatically Controlled Loads ◽  
And Control

AbstractThe increasing penetration of renewable energy sources (RESs) brings more power generation fluctuations into power systems, which puts forward higher requirement on the regulation capacities for maintaining the power balance between supply and demand. In addition to traditional generators for providing regulation capacities, the progressed information and communication technologies enable an alternative method by controlling flexible loads, especially thermostatically controlled loads (TCLs) for regulation services. This paper investigates the modeling and control strategies of aggregated TCLs as the virtual energy storage system (VESS) for demand response. First, TCLs are modeled as VESSs and compared with the traditional energy storage system (ESS) to analyze their characteristic differences. Then, the control strategies of VESS are investigated in microgrid and main grid aspects, respectively. It shows that VESS control strategies can play important roles in frequency regulation and voltage regulation for power systems’ stability. Finally, future research directions of VESS are prospected, including the schedulable potential evaluation, modeling of TCLs, hierarchical control strategies of VESS considering ESSs and RESs and reliability and fast response in frequency control for VESS.

A MODIFIED C-DUMP CONVERTER FOR PMSM MACHINE USED IN A FLYWHEEL ENERGY STORAGE SYSTEM

2014 ◽  
pp. 164-168
Author(s):  
K. GOPI ◽  
E. RAMAKRISHNA ◽  
K. NARASIMHAIAH ACHARI ◽  
G. KISHORE
Keyword(s):  
Energy Storage ◽  
Control Strategy ◽  
Storage System ◽  
Energy Storage System ◽  
Experimental Results ◽  
Flywheel Energy Storage ◽  
Modeling And Control ◽  
Flywheel Energy Storage System ◽  
And Control

This paper presents a modified C-dump converter for permanent magnetic synchronous (PMSM) machine used in the flywheel energy storage system. The converter can realize the energy bidirectional flowing and has the capability to recover the energy extracted from the turnoff phase of the PMSM machine. The principle of operation, modeling, and control strategy of the system has been investigated in the paper. Simulation and experimental results of the proposed system are also presented and discussed.

An Operating Control Strategy of Zinc Bromine Flow Battery Energy Storage Systems in Microgrid

2014 ◽  
Vol 1070-1072 ◽  
pp. 449-455 ◽  
Author(s):  
Xin Zhen Feng ◽  
Yi Bin Tao ◽  
Jin Hang Hu ◽  
Qiang Li
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Control Strategies ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Energy Storage System ◽  
Energy Sources ◽  
Flow Battery ◽  
Battery Energy Storage ◽  
Battery Energy

With the continuous development of distributed solar, wind power and other renewable energy sources, renewable energy sources which has its own features, such as intermittent and randomness volatility, brings great challenges to the stable operation of power grid. Aiming at meeting the requirement of balancing the fluctuating renewable energy sources of micro grid, this paper proposes the operating control strategies of the zinc bromine flow battery storage. Firstly, the equivalent mathematical model based on the working principle of the zinc bromine flow battery is established; Secondly, a dual closed-loop strategy for the DC/DC converter is proposed, of which the inner loop is peak current control on zinc bromine flow battery side inductance while the outer loop is a switch control by constant active power and trickle current. By resorting the DC/AC grid side converter, the stability of DC bus voltage is maintained; Then, this paper proposes the optimization power control strategies of zinc bromine battery energy storage system as a constraint of state of charge and DC bus voltage; Finally, a 50kW zinc bromine flow battery energy storage system test platform is built, and the charging and discharging characteristics of zinc bromine energy storage system (ZESS) is researched in grid-connected mode, the test results have shown that the proposed power optimization control strategies for zinc bromine energy storage system could smooth renewable energy sources power fluctuation.

Sign in / Sign up

Export Citation Format

Share Document