Protection Of Dc system throgh Z source Breaker
Z-Source is the technique through which we have designed a DC circuit breaker which Protects our system from short circuit faults and increases it?s stability and efficiency because the appliances running on DC are protected.
2025-06-28 16:34:37 - Adil Khan
Protection Of Dc system throgh Z source Breaker
Project Area of Specialization Shared EconomyProject SummaryZ-Source is the technique through which we have designed a DC circuit breaker which Protects our system from short circuit faults and increases it’s stability and efficiency because the appliances running on DC are protected.
Project Objectives1.Our objective is to protect the equipment as well as lines
2.Improved DC system for better reliability
3.To make system more efficient and long survivability
Project Implementation MethodWe are taking DC supply from AC to DC converter and suppling it to DC load and between source and load is our Z-source circuit breaker which protects our system from short circuit faults and bidirectional faults .When short circuit fault occurs the Z –source breaker make the fault current to go in the reverse path which opposes the fault current and our system gets protected .We have used Thyristors so the system remains off until we give Z-source breaker a gate signal and then our system starts again.
Benefits of the ProjectThe novel bidirectional dc z-source breaker is designed to work between the dc microgrids or between microgrid and the
nanogrid in distribution system. Consider the bidirectional zsource breaker is connected between two microgrids and a
short circuit occurs. The bidirectional z-source breaker uses the unidirectional series z-source breaker topology and causes the system to break and remove the faulted area before the fault current exceeds its limit. This design uses two unidirectional series z-source breakers connected in parallel and in opposite direction with a common shunt capacitor. When a short circuit occurs with the consideration that power flow is from left to right and the right side microgrid is acting as load, the lower set of inductors and capacitor are used to break the circuit and save the left dc microgrid i-e the source. Similarly, when the load is on the left microgrid upper set of
inductors and capacitors break the circuit
A novel bidirectional dc circuit breaker topology is investigated for operation in dc micro grids to help in protection schemes against short circuit faults. When a short-circuit fault occurs, the proposed topology utilizes a Z-source breaker circuit to naturally commutate off the SCR by diverting the current and reducing the current to zero through the SCR, thus avoiding Circuit breaking under high current conditions. As compared to existing unidirectional dc circuit breakers, the proposed bidirectional z-source breaker works in applications that require Bi-directional power flow between different nodes of micro grids. The analysis, operation and simulation of the new bi-directional breaker topology is presented. The results are obtained for
comparative analysis through simulation and validated through hardware testing in the lab.
Final Deliverable of the Project Hardware SystemType of Industry Manufacturing Technologies Augmented & Virtual RealitySustainable Development Goals Good Health and Well-Being for PeopleRequired Resources| Item Name | Type | No. of Units | Per Unit Cost (in Rs) | Total (in Rs) |
|---|---|---|---|---|
| Total in (Rs) | 22850 | |||
| Inductor | Equipment | 6 | 500 | 3000 |
| Capacitor (1) | Equipment | 15 | 150 | 2250 |
| Capacitor(2) | Equipment | 15 | 120 | 1800 |
| Supply | Equipment | 2 | 4500 | 9000 |
| Pcb sheet | Equipment | 2 | 150 | 300 |
| Resitance | Equipment | 10 | 10 | 100 |
| Trainer | Equipment | 1 | 800 | 800 |
| IGBTs | Equipment | 10 | 60 | 600 |
| Transistor | Equipment | 10 | 500 | 5000 |