火电厂毕业设计论文说明书(5)

For general not the system protects, realizing the calculator net that protection equip also have the very big advantage.After electricity the system that protection device can get break down the information is more many, then to break down kind, break down the judgment of the position with examination that breakdown distance is more accurate.To protect the research of the principle from the orientation already over very long of time, also obtain the certain result, but wants to be real to realize the protection circulate the way to the system with break down the appearance of from orientation, must acquire more systems circulate with break down the information, only realizes the protective calculator network turns, then can attain this point.

From above then, the tiny machine protection equips the network turn and can increases to protect the function consumedly with the dependable, this is inevitable trend that tiny machine the protection develop. At realize the calculator that protect turns after the electricity is next with the term that network turn, the protection equips in reality be a set high performance, multi-function calculator, is an intelligence terminal of whole electric power system calculator network.It can obtain from the net the electric power system circulates with any information that break down with data, also can get its acquisition of is protected any information of a dollar piece deliver with data to network control centre or any terminals.Therefore, the each tiny machine protection not only can complete to protect the function after the electricity, but also equips to can

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also complete the diagraph while having no the normal movement in breakdown circumstance, control, data correspondence function, that is realize protection, control, measure, data correspondence the integral whole turns.

Current, for measuring, protection with the demand of the control, all equipmentses of the outdoors transformer substation, if transformer, circuit...etc. two times electric voltage, electric current must use to control the electric cable leads the lord controls the room.The large quantity control electric cable that a establish not only pump capital into, but also makes two times back track is very complicated.But if will above protection, control, measure, the data corresponds by letter the calculator that integral whole turn equips, installing right on the spot by the side of outdoors transformer substation of is protected equipments, will be protected the electric voltage, electric current of the equipments measures to equip here the inside the conversion arithmetic figure after measuring, pass the calculator network send to the lord controls the room, then can dismiss a flood of control electric cable.If use the fiber optic the conduct and actions the network deliver to lie the quality, can also dismiss the electromagnetism interference.The light electric current feels with each other now the machine( OTA) feels with light electric voltage with each other the machine( OTV) have got the application in study experiment for stage, future inevitablely in the electric power system.Under the situation of adopting the OTA with the OTV, the protection device should put at be

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apart from the OTA with the OTV recently of place, that is should put at is protected the equipments is nearby.The OTA inputs to masquerade to place to this integral whole to combine with the OTV light signal conversion after the telecommunication number, used to the protective calculation judgment on the other hand;On the other hand be used as the amount of diagraph, pass the network send to the lord controls the room.Control from the lord the room pass network can will to is protected the operation control order of the equipments send to this integral whole masquerades to place, from here the integral whole masquerades to place the operation that carry out breaks the road machine.

In recent years, artificial intelligence technique,such as nerve network,, inherited the calculate way and evolve programming, misty logic...etc. to all get the application in the electric power a realm, at protect the applied research in realm to have too started after the electricity.The nerve network is a kind of not method that line shoot, a lot of hard list the equation or hard beg the complicacy of the solution not line problem, apply the nerve network method to then can solve problems with the greatest ease.For example in the power line two side system electricity power the angle puts to open circumstance next occurrence through short circuit that transition electric resistance be a not line problem, the distance protects the very difficult exactitude make the breakdown position distinguish, from but result in the mistake move or refuse to move;If use the nerve network method, through the training that large quantity break down sample, as long

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as the sample concentrates to consider every kind of circumstance well, then while taking place any breakdown can the exactitude distinguish.Other such as heredity calculate way, evolve the programming etc. to also all have its beg specially solution complicacy the ability of the problem.Can make beg the solution speed the appropriate combination in method in these artificial intelligenceses sooner.Can foresee, the artificial intelligence technique is protecting the realm to will get the application necessarily after the electricity, toing resolve to use the problem of the hard solution in method in normal regulations.

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电力系统继电保护技术的现状与发展

电力系统的飞速发展对继电保护不断提出新的要求，电子技术、计算机技术与通信技术的飞速发展又为继电保护技术的发展不断地注入了新的活力，因此，继电保护技术得天独厚，在40余年的时间里完成了发展的4个历史阶段。 建国后，我国继电保护学科、继电保护设计、继电器制造工业和继电保护技术队伍从无到有，在大约10年的时间里走过了先进国家半个世纪走过的道路。50年代，我国工程技术人员创造性地吸收、消化、掌握了国外先进的继电保护设备性能和运行技术，建成了一支具有深厚继电保护理论造诣和丰富运行经验的继电保护技术队伍，对全国继电保护技术队伍的建立和成长起了指导作用。阿城继电器厂引进消化了当时国外先进的继电器制造技术，建立了我国自己的继电器制造业。因而在60年代中我国已建成了继电保护研究、设计、制造、运行和教学的完整体系。这是机电式继电保护繁荣的时代，为我国继电保护技术的发展奠定了坚实基础。

自50年代末，晶体管继电保护已在开始研究。60年代中到80年代中是晶体管继电保护蓬勃发展和广泛采用的时代。其中天津大学与南京电力自动化设备厂合作研究的500kV晶体管方向高频保护和南京电力自动化研究院研制的晶体管高频闭锁距离保护，运行于葛洲坝500kV线路上，结束了500kV线路保护完全依靠从国外进口的时代。

在此期间，从70年代中，基于集成运算放大器的集成电路保护已开始研究。到80年代末集成电路保护已形成完整系列，逐渐取代晶体管保护。到90年代初集成电路保护的研制、生产、应用仍处于主导地位，这是集成电路保护时代。在这方面南京电力自动化研究院研制的集成电路工频变化量方向高频保护起了重要作用，天津大学与南京电力自动化设备厂合作研制的集成电路相电压补偿式方向高频保护也在多条220kV和500kV线路上运行。

我国从70年代末即已开始了计算机继电保护的研究，高等院校和科研院所起着先导的作用。华中理工大学、东南大学、华北电力学院、西安交通大学、天津大学、上海交通大学、重庆大学和南京电力自动化研究院都相继研制了不同原理、不同型式的微机保护装置。1984年原华北电力学院研制的输电线路微机保护装置首先通过鉴定，并在系统中获得应用，揭开了我国继电保护发展史上新的一页，为微机保护的推广开辟了道路。在主设备保护方面，东南大学和华中理工大

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