This document describes the development of an intelligent digital synchronizing relay with real-time monitoring and control capabilities. The objective was to develop a compact digital model to upgrade an existing analog synchronizing relay design, ensuring reliable operation at low cost. The proposed model was tested on a 230kV feeder and certified by engineers. It offers enhanced synchronization through real-time monitoring and a more compact design at lower cost than existing analog models.
Study of amendments were done to analyze the interpretation of new clauses and implications of the same on the existing products/scope of new projects or products
Excitation System & capability curve of synchronous generatorMANOJ KUMAR MAHARANA
Excitation systems perform control and protective functions essential to the satisfactory performance of the power system.
The amount of continuous reactive power a generator can supply is restricted by various limits. In the over-excitation region limits are imposed by rotor heating or amount of field current and second is the stator current. In the under excitation region the limits are imposed by load angle. So in steady state the generator should always operate within this region and the loci of the various limiters are called the capability curve of the generator.
�The sample calculations shown here illustrate steps involved in calculating the relay settings for generator protection.
�Other methodologies and techniques may be applied to calculate relay settings based on specific applications.
Study of amendments were done to analyze the interpretation of new clauses and implications of the same on the existing products/scope of new projects or products
Excitation System & capability curve of synchronous generatorMANOJ KUMAR MAHARANA
Excitation systems perform control and protective functions essential to the satisfactory performance of the power system.
The amount of continuous reactive power a generator can supply is restricted by various limits. In the over-excitation region limits are imposed by rotor heating or amount of field current and second is the stator current. In the under excitation region the limits are imposed by load angle. So in steady state the generator should always operate within this region and the loci of the various limiters are called the capability curve of the generator.
�The sample calculations shown here illustrate steps involved in calculating the relay settings for generator protection.
�Other methodologies and techniques may be applied to calculate relay settings based on specific applications.
El diagnóstico por confiabilidad es una herramienta que permite determinar de una manera sencilla el estado de los transformadores a partir de los datos de los ensayos realizados al aceite. Permite realizar un diagnóstico consolidado y por ende tomar la mejor decisión en cuanto al funcionamiento de los equipos.
The 7SD610 relay is a differential protection relay suitable for all types of applications and incorporating all those functions required for differential protection of lines, cables and transformers. Transformers and compensation coils within the differential protection zone are protected by means of integrated functions, which were previously to be found only in transformer differential protection. It is also well-suited for complex applications such as series and parallel compensation of lines and cables.
The 7PG21 is a three phase unit differential protection used to detect in zone phase and earth faults. The relay is applied to overhead line and underground cable circuits as well as shorter circuits such as interconnectors.
Relays (and associated CTs) are installed at each end of the protected circuit and connected together with dedicated metallic pilot wires.
Practical handbook-for-relay-protection-engineersSARAVANAN A
The ‘Hand Book’ covers the Code of Practice in Protection Circuitry including standard lead and device numbers, mode of connections at terminal strips, colour codes in multicore cables, Dos and Donts in execution. Also, principles of various protective relays and schemes including special protection schemes like differential,
restricted, directional and distance relays are explained with sketches. The norms of protection of generators, transformers, lines & Capacitor Banks are also given.
Schneider,
Catalog Thiết Bị Điện Schneider, Catalog Thiết Bị Điện
Catalog Phụ Kiện Schneider, Catalog Phụ Kiện,
Catalog Schneider, Catalog,
https://www.dienhathe.com,
Chi tiết các sản phẩm khác của Schneider tại https://dienhathe.com
Xem thêm các Catalog khác của Schneider tại https://dienhathe.info
Để nhận báo giá sản phẩm Schneider vui lòng gọi: 0907.764.966
Guidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systems
Protection, Automation and Monitoring: SIPROTEC 5 v7.9/v8.0Ryan O'Mara
Highlights of SIPROTEC 5 family of multi-functional protection relays with control.
- SIPROTEC DigitalTwin
- Compatibility of SIPROTEC 4 and SIPROTEC 5 for 87L and 21
- IEC 61850-9-2 Process bus for digital substations (Server/Client)
- SIPROTEC 6MU85 Merging Unit
- Time synchronization with IEEE 1588 for High Precision applications
- SIPROTEC 7SS85 distributed busbar protection based on process bus
- Point-on-wave switching
- Conformal coating of SIPROTEC 5 devices as standard
- Cyber Security
- ATEX certification for 7SK85 and 7UM85
- New overcurrent and feeder protection SIPROTEC 7SJ81
- Web Browser
Qualitrol is happy to announce the introduction of our on-line Bushing Monitoring system for power transformers. Bushings regularly fail and can cause catastrophic damage.
You can learn more about Bushing Monitoring from Qualitrol by going here, https://www.qualitrolcorp.com/products/bushing-monitoring/
El diagnóstico por confiabilidad es una herramienta que permite determinar de una manera sencilla el estado de los transformadores a partir de los datos de los ensayos realizados al aceite. Permite realizar un diagnóstico consolidado y por ende tomar la mejor decisión en cuanto al funcionamiento de los equipos.
The 7SD610 relay is a differential protection relay suitable for all types of applications and incorporating all those functions required for differential protection of lines, cables and transformers. Transformers and compensation coils within the differential protection zone are protected by means of integrated functions, which were previously to be found only in transformer differential protection. It is also well-suited for complex applications such as series and parallel compensation of lines and cables.
The 7PG21 is a three phase unit differential protection used to detect in zone phase and earth faults. The relay is applied to overhead line and underground cable circuits as well as shorter circuits such as interconnectors.
Relays (and associated CTs) are installed at each end of the protected circuit and connected together with dedicated metallic pilot wires.
Practical handbook-for-relay-protection-engineersSARAVANAN A
The ‘Hand Book’ covers the Code of Practice in Protection Circuitry including standard lead and device numbers, mode of connections at terminal strips, colour codes in multicore cables, Dos and Donts in execution. Also, principles of various protective relays and schemes including special protection schemes like differential,
restricted, directional and distance relays are explained with sketches. The norms of protection of generators, transformers, lines & Capacitor Banks are also given.
Schneider,
Catalog Thiết Bị Điện Schneider, Catalog Thiết Bị Điện
Catalog Phụ Kiện Schneider, Catalog Phụ Kiện,
Catalog Schneider, Catalog,
https://www.dienhathe.com,
Chi tiết các sản phẩm khác của Schneider tại https://dienhathe.com
Xem thêm các Catalog khác của Schneider tại https://dienhathe.info
Để nhận báo giá sản phẩm Schneider vui lòng gọi: 0907.764.966
Guidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systemsGuidelines for life extension of
existing HVDC systems
Protection, Automation and Monitoring: SIPROTEC 5 v7.9/v8.0Ryan O'Mara
Highlights of SIPROTEC 5 family of multi-functional protection relays with control.
- SIPROTEC DigitalTwin
- Compatibility of SIPROTEC 4 and SIPROTEC 5 for 87L and 21
- IEC 61850-9-2 Process bus for digital substations (Server/Client)
- SIPROTEC 6MU85 Merging Unit
- Time synchronization with IEEE 1588 for High Precision applications
- SIPROTEC 7SS85 distributed busbar protection based on process bus
- Point-on-wave switching
- Conformal coating of SIPROTEC 5 devices as standard
- Cyber Security
- ATEX certification for 7SK85 and 7UM85
- New overcurrent and feeder protection SIPROTEC 7SJ81
- Web Browser
Qualitrol is happy to announce the introduction of our on-line Bushing Monitoring system for power transformers. Bushings regularly fail and can cause catastrophic damage.
You can learn more about Bushing Monitoring from Qualitrol by going here, https://www.qualitrolcorp.com/products/bushing-monitoring/
Design and hardware implementation considerations of modified multilevel casc...Asoka Technologies
Inverters are an essential part in many applications including photovoltaic generation. With the increasing penetration of renewable energy sources, the drive for efficient inverters is gaining more and more momentum. In this work, output power quality, power loss, implementation complexity, cost, and relative advantages of the popular cascaded multilevel H-bridge inverter, and a modified version of it are explored. Optimal number of levels, and the optimal switching frequency for such inverters are investigated, and a 5-level architecture is chosen considering the trade-offs. This inverter is driven by level shifted in-phase disposition pulse width modulation technique to reduce harmonics, which is chosen through deliberate testing of other advanced disposition pulse width modulation techniques. To reduce the harmonics further, the application of filters is investigated, and an LC filter is applied which provided appreciable results. This system is tested in MATLAB/Simulink, and then implemented in hardware after design and testing in Proteus ISIS. The general cascaded multilevel H-bridge inverter design is also implemented in hardware to demonstrate a novel low-cost MOSFET driver build for this study. The hardware setups use MOSFETs as switching devices and low-cost ATmega microcontrollers for generating the switching pulses via level shifted in-phase disposition pulse width modulation. This implementation substantiated the effectiveness of the proposed design.
Compensator Based Performance Enhancement Strategy for a SIQO Buck ConverterIAES-IJPEDS
This paper attempts to design lag and lag-lead compensators for improving the performance of a Single Inductor Quad Output (SIQO) dc-dc buck converter in terms of time domain and frequency domain specifications. It develops the state space averaged model to find the duty ratio of the desired output voltages at steady state. The exercise arrives at the transfer function model from the state space averaged model through the use of its lumped small signal equivalent circuit which allows analyzing the performance of the system in frequency and time domains.The responses are derived in the MATLAB/Simulink® using discrete components incorporating compensators of the converter. The hardware results obtained using Data Acquisition Module DT9834® interfaced to MATLAB/Simulink® and prototype model establish the performance of the compensator based converter and further emphasize its ability to minimize the ripples over a range of operating loads.
This list contains a detailed set of project abstracts based on latest IEEE embedded projects. This list contains latest IEEE project abstracts based on Raspberry Pi and ARM processor for Electronics and communication, Electronics and Instrumentation, Electrical and Electronics, Information Technology students. This list contains few abstracts only. For more abstracts based on Embedded, Biomedical, Matlab, NS2, VLSI, Java, Android, .NET, PHP, visit www.softroniics.in or Call 9037291113
2. OBJECTIVE :
To develop and implement an innovative
digital version of the existing conventional
model of analog synchronizing relay, thereby
upgrading the existing design, ensuring
effective and reliable operation with the
compact model at very low design cost.
17. Advancements of the proposed model :
1. The proposed model is a compact digital model.
2. The model also replaces the bulkier trolleys with
enhanced operation as it is interfaced with real time
monitoring and control.
3. More simpler, effective and reliable synchronization is
ensured at very low design cost.
4. Best suited for synchronization at multiple voltage levels
5. Depending on the healthiness of the system, it can be
operated in manual or automatic mode.
6. Response time of the relay is less then 20ms, which
makes it more efficient compared to the analog ones.
18. Project testing :
This project was tested and verified in a real
time practical environment, by connecting the model
to the bus bar protection panel of a 230 KV feeder at
400/230-110 KV substation at Alamathy, Chennai .
It is worthy to be noted that the model was
demonstrated in the presence of all Engineers of
Alamathy substation and 230KV Korattur substation
and was certified to be a quality relay.
19. End note :
As per our objective, the proposed
compact digital model has been proved to
offer more enhanced operation as it is
interfaced with real time monitoring, thereby
ensuring simpler, effective and reliable
synchronization at very low design cost.
We thank all our College faculties ,
mentors and field Engineers for guiding and
motivating us throughout the course of
project work .
