| Power transformer project namely, transformer substation; It is in the electrical power system carries on the transformation, the centralism and the assignment place to the electrical energy voltage and the electric current. For the guarantee electrical energy's quality as well as equipment's security, must make the voltage regulation, the tidal current in the transformer substation (in electrical power system in various nodes and leg's voltage, electric current and power flow direction and distribution) controls as well as the distribution line and the main electrician equipment's protection. The transformer substation by the main wiring, the main transformer, the high pressure, the low pressure power distribution equipment, the relay protection and the control system, uses electricity with the direct current system, moves far with the communications system, the essential reactive power compensation system and the master control room and so on compose. And, the main wiring, the main transformer, the high and low pressure power distribution equipment and so on belongs to a subsystem; The relay protection and the control system, the direct current system, move with the communications system and so on are two subsystems far. The main wiring is the transformer substation most important component. It is deciding the transformer substation function, the construction investment, the riding quality, the maintenance condition and the power supply reliability. Generally divides into the single bus bar, the double bus bar, -and-a-half a circuit breaker wiring and the ring-like wiring and so on several fundamental modes. The main transformer is the transformer substation most important equipment, its performance and disposition immediate influence to transformer substation sophistication, efficiency and reliability. Generally the transformer substation must install 2~3 main transformers; when 330 kilovolt and below, the main transformer usually uses the three-phase transformer, its capacity according to puts into 5 ~10 year anticipated load choices. In addition, and the site choice as well as the general arrangement also has the specific request to the transformer substation other unit select. Transformer substation relay protection subsystem protection (including transmission line and bus protection) and part protection (including transformer, reactor and idle work compensation system protection) two kinds. The transformer substation control mode divides into the positive governing generally and elects to control two broad headings. The former refers to the one-to-one press-button control. Regarding controls to many transformer substations, if selects the positive governing method, then control panel quantity are too many, the control surveillance surface is too big, cannot satisfy the movement request, this time must use chooses the prosecution type. Chooses the prosecution type to have the control capacity to be big, the control centralism, the control screen area is small and so on merits; The shortcoming is intuitive is bad, the middle link are many, inconvenient use.The electric power industry is one of national economy Integral parts, it is responsible for the energy which provides the nature transform to supply the electrical energy industry which the people use directly. It namely for the modern industry, the modern agriculture, the modern science technology and the modern national defense provides the necessary power, also and broad masses often live have the close relationship. The electric power is industry advance. Electric power industry's development must first in other Industry sector, the entire national economy be able to go forward unceasingly.Our country has the extremely rich energy. These superior natural conditions have provided the good material base for our country electric power industry's development. But, the old China's electric power industry is backward, is unable its use. However, along with reform and open policy's thorough development, our country electric power industry's development is very quick. To 2000, our country electric power industry jumped world 2nd, the electric power industry development has made the tremendous contribution for our country's national economy high speed development. Not only that our country's electric power industry started to enter"the big electrical network"at present,"the big unit","the ultrahigh voltage junction, the direct current transmission"and so on new technological development new stage, some world level's advanced high technology and new technology, obtained the corresponding application in our country electrical power system.But, used electricity along with the recent years our country national economy's high speed development with the lives of the people rapid rise, the people were getting higher and higher to electric power supply's request, specially supplied power robustness, reliability and endurance. Electric power industry's development still could not satisfy the entire social development the need, has not been able very good to play the advance role, only take 2004 summer's power supply load peak as the example, the nation estimated that altogether lacked about electricity 30,000,000 KW, some 24 provincial capital areas successively appeared pull the floodgate limited power consumption the situation, such aspect anticipated also needed 2~3 years only then possibly to obtain the good solution.The electric power production process is different with other industrial production process an important characteristic, is its production, the transportation, the transformation, the assignment, expense several links is the synchronization instantaneous completes in the identical time. Electric power production process request supply and demand strict dynamical equilibrium, once loses the balanced production process to receive the destruction, even causes the system to disintegrate, is unable to maintain the regular production. The nation and even the world in reliefing lack the telegraph office surface, how to further optimize the dispatch, strengthens the electric power resources the optimized disposition, maximum limit meets the electric power need to become one which of questions the people discuss. This graduation project stemming from to electrical network robustness, reliability and long-enduring consideration. Through to firsthand information's analysis, the host wiring's choice and the comparison, short-circuit current's computation, the main electric appliance equipment's choice and the verification, the circuit diagram plan as well as steps and so on arrester needle high choice, had determined finally the 220kV transformer substation needs main electric appliance equipment, host wiring diagram as well as transformer substation anti-radar protection plan. Through a 220kv transformer substation electricity part design, has achieved"the electrical automation"consolidated the curriculum theoretical knowledge, grasps the transformer substation electricity part design and the anti-radar protection design essential method, experiences specialized foundation which and specialized knowledge level and ability and consolidates us to study, trains us to utilize studies the knowledge to analyze and the solution with this specialized related actual problem, trains us to analyze and to solve the question ability goal independently. Is sure need to cause our more familiar electricity main wiring, electrical power system's tidal current and the short circuit computation as well as each kind of electric power handbook and the electric power specialized reference book use, grasps the transformer substation electricity part and the anti-radar protection design essential method, and increases newly in the design, expands. Enhances the specialized knowledge, the perfect knowledge structure, the development creation thought that raises the specialty technical level and the managed capacity, dares to surmount, the pursue is remarkable, becomes the top level inter-disciplinary talent who masters many skills while specializing in one.
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