Effective Real-Time Operation and Protection Scheme of Microgrids Using Distributed Dynamic State Estimation

2017 ◽  
Vol 32 (1) ◽  
pp. 504-514 ◽  
Author(s):  
Sungyun Choi ◽  
A. P. Sakis Meliopoulos
Keyword(s):  
State Estimation ◽  
Real Time ◽  
Dynamic State ◽  
Protection Scheme ◽  
Time Operation ◽  
Real Time Operation ◽  
Dynamic State Estimation

scholarly journals Smart Sensors for Smart Grid Reliability

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2187 ◽  
Author(s):  
Monica Alonso ◽  
Hortensia Amaris ◽  
Daniel Alcala ◽  
Diana M. Florez R.
Keyword(s):  
Smart Grid ◽  
Real Time ◽  
Smart Grids ◽  
Short Circuit ◽  
Test System ◽  
Smart Sensors ◽  
Smart Sensor ◽  
Protection Scheme ◽  
Time Operation ◽  
Real Time Operation

Sensors for monitoring electrical parameters over an entire electricity network infrastructure play a fundamental role in protecting smart grids and improving the network’s energy efficiency. When a short circuit takes place in a smart grid it has to be sensed as soon as possible to reduce its fault duration along the network and to reduce damage to the electricity infrastructure as well as personal injuries. Existing protection devices, which are used to sense the fault, range from classic analog electro-mechanics relays to modern intelligent electronic devices (IEDs). However, both types of devices have fixed adjustment settings (offline stage) and do not provide any coordination among them under real-time operation. In this paper, a new smart sensor is developed that offers the capability to update its adjustment settings during real-time operation, in coordination with the rest of the smart sensors spread over the network. The proposed sensor and the coordinated protection scheme were tested in a standard smart grid (IEEE 34-bus test system) under different short circuit scenarios and renewable energy penetration. Results suggest that the short-circuit fault sensed by the smart sensor is improved up to 80% and up to 64% compared with analog electromechanics relays and IEDs, respectively.

scholarly journals Real-Time State Estimation in the Cameroon Power System

2013 ◽  
Vol 2013 ◽  
pp. 1-10
Author(s):  
Emmanuel Tanyi ◽  
Edwin Mbinkar
Keyword(s):  
Power System ◽  
State Estimation ◽  
Real Time ◽  
Ad Hoc ◽  
Dynamic State ◽  
System State ◽  
State Variables ◽  
Power System State Estimation ◽  
Dynamic State Estimation ◽  
Measurement Units

An important tool for the energy management system (EMS) is state estimation. Based on measurements taken throughout the network, state estimation gives an estimation of the state variables of the power system while checking that these estimates are consistent with the measurements. Currently, in the Cameroon power system, state estimates have been provided by ad hoc supervisory control and data acquisition (SCADA) systems. A disadvantage is that the measurements are not synchronised, which means that state estimation is not very precise during dynamic phenomena in the network. In this paper, real-time phasor measurement units (PMUs) that provide synchronised phasor measurements are proposed for integration into the power system. This approach addresses two important issues associated with the power system state estimation, namely, that of measurement accuracy and that of optimization of the number of measurement sites, their location, and the importance given to their measurements on the dynamic state estimation.

scholarly journals Real Time Dynamic State Estimation for Power System

2012 ◽  
Vol 38 (2) ◽  
pp. 11-18 ◽  
Author(s):  
A. Thabet ◽  
M. Boutayeb ◽  
M. N. Abdelkrim
Keyword(s):  
Power System ◽  
State Estimation ◽  
Real Time ◽  
Dynamic State ◽  
Time Dynamic ◽  
Dynamic State Estimation
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