scholarly journals Design of protection and control scheme for hybrid nanogrid

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Sachin P. Jolhe ◽  
Gunwant A. Dhomane ◽  
Minal D. Karalkar
Keyword(s):  
Distribution System ◽  
Local Power ◽  
Power Capacity ◽  
Small Power ◽  
Local Loads ◽  
Input System ◽  
Control Scheme ◽  
Single Input ◽  
Protection And Control ◽  
And Control

AbstractNanogrid is “The new ray of hope” for people living in remote isolated locations as well as where power supply reliability is poor. A nanogrid is a small power capacity distribution system with the ability to operate standalone or with a utility grid. It consists of local power production supplying local loads and energy storage systems. In this paper, an innovative inverter design is presented, which converts the power in a single stage. It is superior to the traditional two-stage inverter system and can supply hybrid loads (AC and DC loads) with a single input. System AC and DC bus voltages are regulated under both steady-state and dynamic load variation conditions in the nanogrid. Simulation results are presented which confirm the suitability of the inverter and its control strategy for a hybrid nanogrid system.

scholarly journals Study of a new protection and control method for 22kV distribution system (Blocking relay method)

2001 ◽  
Vol 121 (12) ◽  
pp. 1690-1698
Author(s):  
Nobuyuki Fujiwara ◽  
Naoaki Fukazu ◽  
Ichiro Sumitani ◽  
Shuuji Miyake ◽  
Tooru Tamura ◽  
...  
Keyword(s):  
Distribution System ◽  
Control Method ◽  
Protection And Control ◽  
And Control

The Protection and Control Strategy of Series Compensation Equipment in Distribution Network

2014 ◽  
Vol 513-517 ◽  
pp. 3003-3007
Author(s):  
Xue Bo Liu ◽  
Tong Zhen Wei ◽  
Qun Hai Huo ◽  
Li Bo Han
Keyword(s):  
Distribution System ◽  
Series Compensation ◽  
Switching Losses ◽  
In Series ◽  
Diagnosis Method ◽  
Bridge Type ◽  
Output Side ◽  
Compensation Device ◽  
Protection And Control ◽  
And Control

The voltage stability can be maintained by the series compensation equipment while the voltage sag of distribution system side occurs. The series compensation equipment of cascade H-bridge type has many advantages such as lower harmonic injection into the power system, lower switching losses, easily to be extended and so on. However, due to the complexity of structure and control of the multilevel converter increase the possibility of device failure. In order to improve the reliability of series compensation equipment, this paper analyzes the possible fault type of series compensation devices and combined with the characteristics of different types of faults, proposing a fault diagnosis method for the series compensation equipment of cascade H-bridge type. This method only needs to detect the voltage and current of output side in series compensation equipment, the fault can be successfully dignosed by a certain equivalent and computation .This method is not affected by voltage and current changes, and easy to implement. This device can rapidly diagnosis and remove faults device in continuous operation, then by changing the modulation of inverter makes the series compensation device work normally. The simulation examples proves the validity of this method.

A Distributed Protection and Control Scheme for Distribution Network with DG

2013 ◽  
Vol 732-733 ◽  
pp. 628-633
Author(s):  
Bing Bing Tong ◽  
Gui Bin Zou ◽  
Ming Lei Shi
Keyword(s):  
Fiber Optic ◽  
Distribution Network ◽  
Fault Isolation ◽  
Fiber Optic Network ◽  
High Penetration ◽  
Control Scheme ◽  
Feeder Terminal Unit ◽  
Protection And Control ◽  
And Control ◽  
Optic Network

High penetration level of distributed generation (DG) connected to distribution network makes the protection and control in the traditional distribution network face great difficulties, so this paper proposed a protection and control technology based on advanced feeder terminal unit (AFTU). According to DGs capability and load, the scheme divides the distribution network into several zones in advance, each of which can operate in island mode. Circuit breakers (CB) together with AFTU are installed at the beginning of feeder, the border of two zones and the point of DG connection. AFTUs interconnect with each other through the fiber optic network. AFTU detects the local electrical quantities in real-time and exchanges information with others through the fiber optic network. It can locate the faulted zone quickly to achieve fault isolation and island operation according to local and neighboring information. The reclosing of CB and the control of reconnection of DG are also designed. The case analysis illustrates the feasibility of the proposed distributed protection and control scheme.

scholarly journals Data-driven approach for monitoring, protection, and control of distribution system assets using micro-PMU technology

2017 ◽  
Vol 2017 (1) ◽  
pp. 1011-1014 ◽  
Author(s):  
Emma Stewart ◽  
Michael Stadler ◽  
Ciaran Roberts ◽  
Jim Reilly ◽  
Dan Arnold ◽  
...  
Keyword(s):  
Distribution System ◽  
Data Driven ◽  
Data Driven Approach ◽  
Protection And Control ◽  
And Control

Modelling Interconnection of Future Combustion Engine Power Plants with Traditional Grid

2013 ◽  
Vol 446-447 ◽  
pp. 837-841
Author(s):  
Hashmi Murtaza ◽  
Alanen Raili ◽  
Hänninen Seppo
Keyword(s):  
Smart Grid ◽  
Distribution System ◽  
Power Plants ◽  
Combustion Engine ◽  
Synchronous Generator ◽  
Operating Conditions ◽  
Grid Codes ◽  
Protection And Control ◽  
And Control ◽  
Grid Interconnection

In this paper, a new simulation model is developed to be able to simulate diesel genset smart grid interconnection by keeping in view future requirements of the grids and grid codes. The simulations are carried out in Matlab/Simulink environment. An example case is based on 1200 kW variable speed diesel genset with permanent magnet synchronous generator (PMSG). The simulations are carried out for various dynamic behaviours of PMSG and their protection and control facilities, which are necessary in normal operating conditions and in a range of disturbed operating conditions in order to preserve or to re-establish system security. Various faults (e.g. disturbances) have been induced in the distribution system and the robustness of the network has been analysed to make sure continuous supply of electricity to the consumers in the future smart grid environment.

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