Transient Research on Shanxi Power Transformer and Generator, Cheng Jinsheng Shao Yuxi 21. Shanxi Animal Chemical Design Institute, Taiyuan 30241, Taiyuan Electric Power College, Shanxi. Shanxi Taiang, the physical meaning of the five-state theory. The power system is often subjected to various sudden disturbances in the transportation hall. The disturbance causes the power system to be in the transient over-balance. The large-scale changes in the parameters of the operation may cause damage to the system. Therefore, it is very important to understand the transient process of the power system. A general method for analyzing the transient process of Synchronous Generators and transformers to establish mathematical models, differential equation descriptions, states, and rigorous mathematical derivation to solve differential forces. This method lacks physical concept interpretation, methods, application of these concepts, transformers and synchronization. The transient analysis of the generator can be directly obtained, and each item in the formula can be used. The physical meaning of Chu is that the single-phase double-winding transformer of the å˜1 asher is a single-phase double-winding transformer, and its primary side is connected to a given voltage. The busbar is short-circuited, and the transient characteristics of the equivalent circuit can be used. There is no doubt that the transient characteristics of the two-winding transformer can be analyzed mathematically by solving the two differential equations of Equation 1, and can also be analyzed by the claw method. . The component method is to assume that the current of the pseudo-edge and the pay-side of the transformer is composed of two parts. The steady state of the juice is the same as that of the one-two-winding variator. The transient component is generated when the transformer is initially energized and decays with time. The steady-state current on both sides of the transformer can be used as the date of receipt. 21 Department of Electrical Engineering, School of Mechanical Engineering, Shanxi Provincial Chemical Design Institute, deputy dean, senior engineer. Shao Yuxi, 1949, female, Pingding, Shanxi, graduated from the Department of Electrical Engineering of Taiyuan University in 1975. The electric power teaching and research of Taiyuan Electric Power College was suddenly connected to the voltage bus on the zero-second moment, and the steady-state current on both sides was the moment. When the current value is induced, a turbulent flow and a corresponding payout appear on the side. These two induced currents are actually transient components that decay with time. The time constant governing the transient behavior in a simple circuit can be (1) 7 = B. For two-winding transformers, the time constant cannot be simply described due to the mutual inductance coupling between the windings. In mathematical methods, the time constant depends on Equation 1 and The eigenvalue mathematical method of the state model makes people lack the satisfactory conceptual physical meaning of the physical mechanism. From 2, we can see that 2 is different from 1. They can use two assumed components of a simple transformer. The method obtains the formula 7, and the physical meaning of each item is described as very clear. 2, the transient stator of the step generator is synchronously symmetrical with the phase stator winding of the generator, and it is a sample produced by the winding that actually rotates with the rotor. In the sense, the stage Synchronous Generator can be assumed to be a transformer, the rotor current rotor feels, =+ can be the current and inductance of the transformer primary winding and the stator current and stator inductance +, the phase transformer winding 2 The meaning of 2. Therefore, the concept of transients used to analyze transformers can also be used to analyze synchronous generators. When the generator is in the household, the sudden phase short-circuit fault occurs. Before the fault, it is no-load due to the DC excitation current in the rotor winding. The value of the no-load voltage of the phase winding, for example, 14 and the instantaneous voltage of the phase can be assumed to be the instantaneous voltage value at home, 8 is the component current of the zero-component current, the primary and the side of the transformer, the primary side of the transformer and The edge is 1 point 1; from 3 it can be seen that the current component in the primary winding produces 1 = apparently 3; The result of the payment of the electromuscular foot is equal to a simple circuit swim attenuation without oscillation. The given time constant is from 31. The surrounding magnetic flux generated by the current around the winding current winding generated by the current in the primary winding can be seen. The direction of phase 1 forms a doubled effective mutual coupling pocket reduction. such. The turbulent effect attenuation is determined by the mountain + seven, and the decay is constant according to the time constant. Under the condition of phase short circuit, the steady-state short-circuit current is reached when the stator impedance is superconductor, the short-circuit current lags the voltage when the short-circuit fault occurs, and suddenly occurs. Because there is a short-circuit current in the phase winding, a synthetic rotating magnetic flux will inevitably appear. This magnetic flux enters the core magnetic path of the turret winding, and a current core is induced in the rotating winding to counter its entry as a result. The majority of the stator's synthetic flux and the resulting, added path, 4, the reactance of the short-circuit current is reduced, can be reached, and the first project is the leakage inductance related to the mainstream of the stator flux. This part of the magnetic flux passes through the air gap and reaches the 6th sub-inductance and then is discharged to the rotor flux leakage magnetic flux. The instrument can be written as a coffee 3 channel juice 1 turn. The corresponding inductance can be calculated by the formula 13 Said, the sensation of the sensation 71 factory 1 induced current 4, the attenuation, therefore, the decay time constant is defined as the attenuation of lr, the initial component of the short-circuit current will be corresponding to ± also become, it is determined by the formula 15 not in addition, when initial The rotor magnetic circuit is asymmetrical, corresponding to the current, the inductance will be between the frequency and the frequency of the rotor speed twice and alternately appear twice during the rotor rotation cycle, causing the induced current to pulse at twice the frequency, each Week, from the person position to the minimum value is 戌, 5 small this induced change current can be decomposed into two components, that is, the average DC component induced by the stator resistance will decay with time, ask the constant mountain inductance All, a geometric 12 mean. And the stator resistance factory decided, for the wall Dan Yu, Jia, n9, formula 19 directly write the current fraction and the strict analysis method of the above-mentioned analysis method to sample the corpse analysis and damper winding short-circuit and load conditions Short transient process. 4 Conclusions can be well understood. Each of the analytical expressions can be explained by the clear physical meaning of I1I Li Guangqi. Power system transient analysis. Beijing Water and Electric Power Press, 1995, 164. I3 Shao Yuzhen Synchronous Generator Transient Process Concept Understanding Taiyuan Engineering Large Burner In the rich and light separation burner, the inlet secondary wind has the ratio of the wind to coal ratio of the ordinary burner. After the separation of the shades, the ratio of the wind to the coal in the two streams When the ratio of the wind to coal is 1., the normal burner produces a higher concentration of 0. When the concentration is separated and burned, the ratio is 1 to 00. The weighted average bit 0, by the average, is lower than the ordinary single-strand concentration, which is the principle of reducing the emission of the rich burner. In the 1980s, the Japanese company signed the company's extremely low-pollution concentrated burner to reduce 0 Developed by discharging pollution. Hejin Power Plant 2350 elbow Jia boiler test Ming NCtRA35OlOU2Ons.U References I1I Hui Shien, Xu Tongmo, Tan Houzhang. The peaking type is low with 0 research and application of boiler technology. 199964 2 Sun Xuguang, Analysis of high temperature corrosion of No. 1 furnace in Qingdao Power Plant. Shanxi Electric 3 Guo Luyang. Analysis of high temperature corrosion of water wall in No.1 boiler of Weifang Power Plant. Huashang, page 29, page 31
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