1、 1 英文文献 Power System Substation is an important and indispensable component of the power it assumed the task of conversion and distribution of grid security and the economy play a decisive role in running is to contact the users power plants and intermediate links. With economic development, expandi
2、ng grid capacity, reliability of operation of the power grid is getting higher and higher requirements. Development of science and technology, intelligent switches, photoelectric current and voltage transformer, a run-line state detection, training simulation Substation Operation matures, such as hi
3、gh-tech, as well as fiber-optic technology, computer high-speed network system in the development of real-time applications, bound to the existing substation automation technology have a profound impact, all-digital substation automation system development trend. Keywords: substation automation Powe
4、r system is operated by the production, transmission, distribution and consumption of a variety of power linked to the composition of electrical equipment. As a result of a large number of power can not be stored, we must ensure that the production of electricity and energy balance. With the scienti
5、fic and technological advances in the technological development of our country has reached a certain level. Intelligent switches, photoelectric current and voltage transformer, a run-line state detection, training simulation Substation Operation matures, such as high-tech, as well as fiber-optic tec
6、hnology, computer high-speed network system in the development of real-time applications, significantly increase the transformation degree of automation. Design of our substation substation cable programs tend to be simple, many of the recent domestic new 220 k V substation and 110kV voltage levels
7、of wiring without the use of dual-bus bypass bus. The use of GIS, the priority sub-bus single wire. Terminal Substation, the line as far as possible, such as transformer unit wiring. A large number of the introduction of new technology, transformer substation rising level of electrical equipment, po
8、wer distribution devices from the traditional form of moving toward oil-free, vacuum switches, SF6 switches and mechanical, electrical equipment combination of the development of small-scale integration. In recent years the world famous high-voltage electrical equipment companies have been developin
9、g, the development of the various types of 145-550 kV outdoor high-pressure and ultrahigh-pressure combination of electrical appliances, some high-voltage switchgear 2 plant has also started production of 145 k V compact outdoor portfolio electrical appliances. Smart plug-in type outdoor switchgear
10、is a more complete high-pressure and ultrahigh-pressure switch system, which includes electrical first and second equipment, as well as the associated fiber optic cable, such as plug-type compound. The entire distributed substation automation system； the introduction of advanced network technology；
11、substation and the construction area covers an area of reduced substation program to simplify wiring, switchgear, bus and steel pipes, such as the use of stents to substation layout is more simple, the abolition of the former station area and optimize the layout to make a substantial decline in an a
12、rea substation. With technological advances, the traditional relay protection devices are gradually being replaced by microprocessor-based protection. Microprocessor-based protection is referred to as the protection of PC computer, a digital relay protection, is based on the programmable digital cir
13、cuit technology and real-time digital signal processing technology of the Power System Protection. At present, both at home and abroad have been developed to 32-bit digital signal processor for hardware-based protection, control, measurement, and data communications integration of microprocessor-bas
14、ed protection control devices, and artificial intelligence technology into a number of relay protection, such as artificial neural networks, fuzzy theory to determine the realization of fault type, fault location, the direction of protection, the main equipment and other new methods of protection. B
15、y means of wavelet analysis of the theory of digital signal failure of the entire frequency band information and to achieve fault detection. These artificial intelligence technology to improve the accuracy of failure to provide a means of identification, but also some single-frequency signal based o
16、n the traditional method difficult to identify the problems to be resolved. At present, the microprocessor-based relay protection is along the microprocessor-based protection network, and intelligent, adaptive and protection, control, measurement, signal, data communications integration direction. T
17、he most basic request that charged barbed wire net in the city circulates is safe and stable.The core problem of charged barbed wire net safety in the city stability wants to build up to be a with the city mutually accommodative of, reasonable of charged barbed wire net structure.This text passes an
18、d programs to the charged barbed wire net with electric power and designs the technique principle of the aspect analysis.Elaborated the standard concerning electric voltage grade, power supply credibility, power supply ability and charged barbed wire net safe power supply 3 requests etc. some proble
19、ms that should notice in the charged barbed wire net safety；And have already aimed at sexs elaborating request to the concrete design principle opposite charged barbed wire net safe power supply of the 220 kV transformer substation and 110kV transformer substation. How to promise power supply credib
20、ility 1)Satisfy charged barbed wire net power supply safe standard.The power supply network satisfies the request of power supply credibility.The standard that all satisfies N-l, city area center high burden density important customer in the district satisfy the standard of N-2.Disallow transformer
21、over carry.Help a southern city net power supply credibility rate index sign programming target is 99.99%. 2)Press to go together with charged barbed wire net burden to transfer ability in the city satisfy following request: The transformer substation loses any once enter line or one set lord transf
22、ormer but lower power supply ability, win press to go together with charged barbed wire net to have to transfer burden to ensure the ability of power supply. When a female line of transformer substation stops a luck because of putting, winning to press to go together with charged barbed wire net sho
23、uld have the ability that transfer all burden. When the 10 kv goes together with electric wire road any check to fix or breaks down, going together with the charged barbed wire net should have non- check of transfer to fix, non- breakdown segment ability for carrying.The non- check fixs, The non- br
24、eakdown segment carries to the power is off time only for go together with to give or get an electric shock an equipments to pour a Zha operation for time. 3)Ask to satisfy a following principle while allowing the capacity of the power outage and the target of the instauration power supply while goi
25、ng together with charged barbed wire net breakdown to make the customer the power is off: The customer of two back track power supplies , after losing a back track, should be unlimited to give or get an electric shock. The customer of three back track power supplies , after losing a back track, shou
26、ld be unlimited to give or get an electric shock, again after losing a back track, should satisfy power supply capacity 50-70% is used an electricity. When all of a back track or much customers the power of back track power supplies stopped, resume target time of power supply broke down to handle for a back track restored of ask.
