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所在平台: Udemy |
课程主页: https://www.udemy.com/course/circuit-breaker-failure-protection-scheme/
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课程名称：掌握断路器故障保护方案 概述：本课程介绍了断路器故障保护的基础知识，以备当地断路器无效时清除系统故障。课程从基本概念开始，讲解了断路器的符号及其在变电站中的外观，使用ANSI代码表示断路器，以及断路器与线路隔离器的区别。我们探讨了断路器的不同功能，电弧的形成及其扑灭方法，扑灭电弧的介质，以及未扑灭电弧可能造成的后果。 讲师介绍：本课程的讲师拥有超过21年的操作与维护、安装、测试、项目管理、咨询、监督、变电站自动化和投运经验。他在电力行业中有丰富的背景，曾在西门子沙特阿拉伯公司工作，参与了超过20个高压变电站项目，涵盖保护系统、变电站自动化系统及电力生成系统的设计与测试等多个领域。 课程内容：课程中详细讨论了断路器的各个组成部分，包括闭合线圈、跳闸线圈、辅助接点及相关保护系统等。我们还介绍了直流电池组、继电器、电流和电压变压器的重要性，以及控制和跳闸功能使用直流而不是交流电的原因。课程还涵盖了不同类型的断路器故障，诸如机制故障、故障电流未中断等。 此外，课程还探讨了母线方案的多种类型，包括单母线单断路器方案和双母线双断路器方案，以及如何在不中断电源的情况下实现负载切换。断路器故障哲学部分介绍了低压和中压水平的故障保护，帮助学员理解断路器故障保护的基本概念和设计。 通过完成本课程，您将能够理解断路器故障继电器的功能，断路器故障保护方案及其操作矩阵，以及不同母线方案下的故障保护策略。 祝您学习顺利！ Elite Engineering 敬上
The circuit breaker failure protection provides a backup protection in the case, that the local circuit breaker fails to clear a system fault.In this training we have started from basic concepts, explained circuit breaker symbol and how circuit breaker look like in substation. We have discussed in training how to represent circuit breaker by ANSI code, difference of circuit breaker and line isolator. What are different functions that are performed by circuit breaker, what is arc, how to quench arc, what are media to quench arc, what will happen if arc is not quenched. Trainer Introduction:Your trainer brings over 21 years of experience in operation & maintenance, erection, testing, project management, consultancy, supervision, substation automation, SCADA, and commissioning. With a background spanning power plants, high voltage substations, and HVDC installations, he has worked with renowned organizations such as Siemens Saudi Arabia. He has been involved in over 20 high-voltage substation projects across Pakistan and Saudi Arabia.His expertise encompasses a wide range of areas including protection systems, substation automation systems, design, testing, and commissioning of power generation systems, high voltage switchgear, protection relays, and control schemes. He has a proven track record of leading testing and commissioning teams for implementing electrical infrastructure projects for industrial clients, including steel and petrochemical industries.We have discussed different components of circuit breaker that include CB closing coil, tripping coils, auxiliary contacts, normally open and normally close contacts, simplified protection system consisting of DC battery banks/charger, relays, Current and voltage transformers, why CT & VTs are required at substation, what do you understand by CT ratio 1000/1, use of redundant DC supplies, why DC is used not AC for control & trip functions, how circuit breaker spring is charge, circuit breaker operation, what is trip free/ready to trip function of CB, Trip Circuit Supervision feature, DC supply supervision, trip coil supervision, TCS Relay, control & protection DC supplies & Tripping coils, what is typical tripping and closing time of circuit breaker. What are different types of breaker failure that can occur in power system:Circuit Breaker Failure due to Mechanism FailCircuit Breaker Failure due to non-interruption of fault currentCircuit Breaker Failure due to DC control/trip supply fail Circuit Breaker Failure due to tripping coil failureCircuit Breaker Failure due to low DC voltageCircuit Breaker Failure due to Aux contact failureCircuit Breaker Failure due to FireCircuit Breaker Failure due to delayed trippingCircuit Breaker Pole Discrepancy What is Circuit Breaker Pole Discrepancy:Single pole & three pole circuit breaker operated mechanismsadvantages of single pole tripping & reclosingHow single pole reclosing support systemWhat is meaning of pole discrepancy How pole discrepancy is detected in system Pole discrepancy circuit working Timer circuit in pole discrepancyStage 1 & Stage 2 operations of pole discrepancyPole discrepancy during closing command & tripping command.Re-trip and 2nd stageWhat is typical time settings for Pole discrepancyCreation of 3I0 zero sequence current during pole discrepancy conditionHow Pole Discrepancy can lead to indiscriminate tripping in the networkBusbar Schemes:In order to understand it is good idea to learn about busbar schemes, we will go through following busbar schemes.Single Bus Single Breaker SchemeDouble Bus Single Breaker SchemeOne and half breaker schemeMesh Breaker schemesdouble bus and double breaker How to change over load from one bus to another bus without interruption Advantages of different busbar schemeCircuit Breaker Fail Philosophy:Circuit breaker failure protection using relay coordination at low / MV levels What to do & protect if one breaker failUnderstand basic concept of breaker failure, if some one understand well can design and understand all CBF protection schemes & logicCBF protection example in one and half breaker scheme, how to protect system if middle breaker fail , How to protect system if main breaker fail.CBF protection example in double bus double breaker busbar, consider the case of bus coupler & bus sectionalizer.Circuit Breaker Failure Logic, Function:Circuit Breaker Failure logic blockCBF initiation functionCBF current guardCBF Low current modeCBF CB Aux contact inputCBF timer CBF stage 1 & Stage 2 CBF for Mechanical Protection not involving currentCBF protection and End fault protection CBF Re-trip & 2nd stage faulty CB isolation from sourcesCBF when Circuit Breaker is faulty CBF and lockout function, 86 close block relayCBF & CB close blockingCBF typical times for stage 1 & stage 2 & when CB faulty By completing this course you will be able to understand circuit breaker failure relay function, Circuit breaker failure scheme/trip matrix, how CBF stage 1 & 2 operate, CBF protection for different busbar schemes. I wish you best of luck for the course.Best Regard Elite Engineering
