Mohammad Tasdighi
Texas A&M University, Electrical and Computer Engineering, Department Member
- Renewable Energy, Electrical Engineering, Energy, Smart Grid, Power System Protection Engineering, Distance Relay, and 19 moreSetting Relay, Microgrid, Energy Management, Fault Detection, Demand Side Management, Demand Response, Wind Energy, Wind Power, Distributed generation & energy storage systems, Fault location, Micro-CHP, Power Transmission Congestion Management, Power Swing, Satic Synchronus Series Compensator, Engineering, Mechanical Engineering, Solar Energy, Bioenergy, and Electrical and Computer Engineering (ECE)edit
One big challenge raised by frequent topology change in today’s power system is assessing the system protection security and dependability afterwards. This paper reviews the setting algorithm for the distance relays and proposes an... more
One big challenge raised by frequent topology change in today’s power system is assessing the system protection security and dependability afterwards. This paper reviews the setting algorithm for the distance relays and proposes an automated setting calculation module. The calculation procedure is broken down into blocks which could be processed in parallel in order to improve the computation speed. The module could be used to assess the system protection vulnerabilities following a topology change in instances when multiple switching actions are done in response to occurrence of cascading faults or as a result of intentional control action. The module performance is tested on New England 39-bus and IEEE 118-bus systems. A sensitivity analysis in the form of N-2 contingency impact on the network relay settings is conducted on both test systems.
Research Interests:
The topology (transmission line) switching to achieve economic and reliability gains in the power grid has been proposed some time ago. This approach did not gain much attention until recently when large penetration of renewable... more
The topology (transmission line) switching to achieve economic and reliability gains in the power grid has been proposed some time ago. This approach did not gain much attention until recently when large penetration of renewable generation created incentives to use transmission line switching to control sudden changes in power flows and mitigate contingencies caused by the generation variability. This paper explores implementation issues related to circuit breaker (CB) monitoring, relay setting coordination and detection of relay misoperations in the context of the topology switching sequence implementation. The paper covers risk-based assessment of CB status needed for determination of reliable switching sequences; it indicates how relay settings may be changed due to switching actions; it also provides an on-line algorithm for detection of relay misoperations, which identifies the lines that may be switched back to service after being trip erroneously by a relay.
Research Interests:
Fault current magnitude and transient recovery voltage (TRV) are two important factors effecting circuit breaker (CB) operation during short-line faults. In this paper an inductive fault current limiter (FCL), which is a traditional kind... more
Fault current magnitude and transient recovery voltage (TRV) are two important factors effecting circuit breaker (CB) operation during short-line faults. In this paper an inductive fault current limiter (FCL), which is a traditional kind of FCL, is modeled and simulated using electromagnetic transient program (EMTP) to study its effects on these two factors. It is assumed that the FCL is placed following the circuit breaker at the beginning of the line. Mathematical formulas are obtained for describing the relationship between the current limit factor and the recovery voltage of a CB as well as the rate of rise of recovery voltage (RRRV) based on theoretical analysis. The mathematical analysis is compared and verified with simulation results.
Research Interests:
One of the important points in optimal operation of a micro-CHP based microgrids (e.g., a residential building) is to coordinate its thermal and electrical loads. Therefore, in this study, thermal load is analyzed more precisely in terms... more
One of the important points in optimal operation of a micro-CHP based microgrids (e.g., a residential building) is to coordinate its thermal and electrical loads. Therefore, in this study, thermal load is analyzed more precisely in terms of the required hot water and desired building temperature. The microgrid is assumed to be equipped with smart meters and controllable electrical loads. The information provided by smart meters is utilized in implementing smart control of micro-CHP, storages, and demand response programs. This study is aimed at presenting an optimal scheduling model for a microgrid considering technical and economical constraints based on temperature dependent thermal load modeling. A sensitivity analysis is conducted to identify and rank the impact of several uncertainties such as variations in temperature, electrical and thermal demand.
Research Interests:
According to the recent research significant amount of building energy consumption can be saved through optimized operation and management and it is not necessary to change the building structure and the hardware configuration of the... more
According to the recent research significant amount of building energy consumption can be saved through optimized operation and management and it is not necessary to change the building structure and the hardware configuration of the energy supply system. Therefore, there is a huge potential for building energy savings through efficient operation. In this paper a smart building (microgrid) is assumed to be supplied by different power sources such as CHP, PV, battery, and main grid. The microgrid is connected to the main grid and it can buy/sell power from/to the grid. Furthermore, day-ahead electricity pricing is assumed for the grid power. The goal is to find optimized solution for scheduling problem of the building energy sources. Furthermore the effect of the battery on operation cost is investigated.