scholarly journals Differential Evolution Based Special Protection and Control Scheme for Contingency Monitoring of Transmission Line Overloading

2017 ◽  
pp. 475-487
Author(s):  
Mahmood Khalid Hadi ◽  
Mohammad Lutfi Othman ◽  
Noor Izzri Abd Wahab
Keyword(s):  
Differential Evolution ◽  
Transmission Line ◽  
Control Scheme ◽  
Protection And Control ◽  
And Control ◽  
Special Protection

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 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.

Novel Scheme of Fast Protection and Control for Feeder Automation

2013 ◽  
Vol 732-733 ◽  
pp. 899-904
Author(s):  
Gui Bin Zou ◽  
Hou Lei Gao
Keyword(s):  
Correct Identification ◽  
Distribution Grid ◽  
Feeder Automation ◽  
Fibre Network ◽  
Modern Distribution ◽  
Control Scheme ◽  
The Status ◽  
Optic Fibre ◽  
Protection And Control ◽  
And Control

This paper proposed a fast protection and control scheme of feeder automation (FA) for the modern distribution grid. The smart terminal unit (STU) is installed at each switchgear of the feeder, and STU has a directional over-current component. The adjacent STUs are connected each other by the optic fibre network, and ultimately they are all connected to the central station of FA. STU detects the local current and the status of breaker in real time, meanwhile exchanges the information with adjacent STUs. Through analyzing the information, STU can make a correct identification for a faulted section. Therefore, the faulted section can be isolated and power supply of non-faulted section can also be restored rapidly. Case analysis illustrates that the proposed fast protection and control scheme is valid and feasible.

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