CN106777564A - The repair method and system of a kind of generator hydrogen cooling system - Google Patents
The repair method and system of a kind of generator hydrogen cooling system Download PDFInfo
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- CN106777564A CN106777564A CN201611074251.XA CN201611074251A CN106777564A CN 106777564 A CN106777564 A CN 106777564A CN 201611074251 A CN201611074251 A CN 201611074251A CN 106777564 A CN106777564 A CN 106777564A
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Abstract
The invention discloses a kind of repair method of generator hydrogen cooling system, including：Set up the Mathematical Modeling of generator hydrogen cooling system；According to the Mathematical Modeling set up, the cooling procedure to generator hydrogen cooling system is emulated；According to the simulation result, generator hydrogen cooling system is overhauled.Additionally, also disclosing a kind of examination and repair system of generator hydrogen cooling system.The present invention can accurate simulation goes out and actual cooling ruuning situation is consistent result, reflect the cooling process of generator, grasp the operating overview of real equipment.Normal and accident ruuning situation that is more accurate and comprehensively simulating generator cooling so that simulation result preferably overhauls effect closer to field operational data so as to reach.
Description
Technical field
The present invention relates to generator cooling technology field, more particularly to a kind of repair method of generator hydrogen cooling system
With a kind of examination and repair system of generator hydrogen cooling system.
Background technology
With the high speed development of power industry, Large Copacity, the generating set of high parameter have become main flow, the ginseng of generator
Number also more and more highers, and that the monitoring of the cooling system of generator also becomes therewith to unit operation is more important.For taking at present
Wide variety of hydrogen cooling system is obtained, due to needing to process substantial amounts of physical object, and is had in cooling procedure a large amount of
Intermediate parameters, cause people be difficult to grasp its cooling procedure real working condition, considerably increase the difficulty overhauled to it
Degree.And, generator hydrogen cooling system it is also proposed requirement higher to the precision of inspection operation.Therefore, in the urgent need to seeking
A kind of accurately completely repair method is looked for, the base that can truly reflect in the normal and accident ruuning situation cooled down to generator
On plinth, targetedly inspection operation is performed.
The content of the invention
Based on this, the repair method and a kind of generator hydrogen the invention provides a kind of generator hydrogen cooling system are cold
But the examination and repair system of system.
A kind of repair method of generator hydrogen cooling system, comprises the following steps：
Set up the Mathematical Modeling of generator hydrogen cooling system；
According to the Mathematical Modeling set up, the cooling procedure to generator hydrogen cooling system is emulated；
According to the simulation result, generator hydrogen cooling system is overhauled.
Compared with general technology, the repair method of generator hydrogen cooling system of the present invention, according to the Mathematical Modeling set up,
Cooling procedure to generator hydrogen cooling system is emulated.On the basis of simulation result, can be cold to generator hydrogen
But system is overhauled.The present invention can accurate simulation goes out and actual cooling ruuning situation is consistent result, reflect generating
The cooling process of machine, grasps the operating overview of real equipment.It is more accurate and comprehensively simulate the normal of generator cooling and
Accident ruuning situation so that simulation result preferably overhauls effect closer to field operational data so as to reach.
A kind of examination and repair system of generator hydrogen cooling system, including set up module, emulation module and maintenance module；
It is described to set up module, the Mathematical Modeling for setting up generator hydrogen cooling system；
The emulation module, for according to the Mathematical Modeling set up, to the cooled of generator hydrogen cooling system
Cheng Jinhang is emulated；
The maintenance module, for according to the simulation result, being overhauled to generator hydrogen cooling system.
Compared with general technology, the examination and repair system of generator hydrogen cooling system of the present invention, according to the Mathematical Modeling set up,
Cooling procedure to generator hydrogen cooling system is emulated.On the basis of simulation result, can be cold to generator hydrogen
But system is overhauled.The present invention can accurate simulation goes out and actual cooling ruuning situation is consistent result, reflect generating
The cooling process of machine, grasps the operating overview of real equipment.It is more accurate and comprehensively simulate the normal of generator cooling and
Accident ruuning situation so that simulation result preferably overhauls effect closer to field operational data so as to reach.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the repair method of generator hydrogen cooling system of the present invention；
Fig. 2 is the structural representation of the examination and repair system of generator hydrogen cooling system of the present invention.
Specific embodiment
It is below in conjunction with the accompanying drawings and preferably real further to illustrate the effect of the technological means taken of the invention and acquirement
Example is applied, to technical scheme, clear and complete description is carried out.
Fig. 1 is referred to, is the schematic flow sheet of the repair method of generator hydrogen cooling system of the present invention.
The repair method of generator hydrogen cooling system of the present invention, comprises the following steps：
S101 sets up the Mathematical Modeling of generator hydrogen cooling system；
S102 is emulated according to the Mathematical Modeling set up, the cooling procedure to generator hydrogen cooling system；
S103 is overhauled according to the simulation result to generator hydrogen cooling system.
Following treatment is done to generator hydrogen cooling system physical object：
Hydrogen control row：Source point；
CO2 control rows：Source point；
Circulating fan：Consideration circulating fan whether power transmission, then FAN.VV is 1 to power transmission, is otherwise 0.Such as need more detailed
Emulation then needs Script controlling FAN.VV；
Dehydrating unit：Do not emulate, without module without algorithm；
Profit detecting alarm (leakage detection apparatus)：Do not emulate, without module without algorithm (if it is desired, being realized with script；Or
Individually make a purity analysis instrument mould to realize)；
Purity analysis instrument：Hydrogen purity is directly with the purity signal of generator hydrogen module (if it is desired, use script reality
It is existing；Or individually make a purity analysis instrument mould to realize)；
Hydrogen humidity instrument：Hydrogen humidity is not calculated, and the hydrogen humidity in system directly puts number；Then script reality if needed
It is existing, or a hygronom module is individually done again)；The humidity of hydrogen is represented with dew point of hydrogen, under the pressure working condition of 0.3MPa,
Dew point of hydrogen will be controlled at -5~-25 DEG C.
Hydrogen cooler：Hydrogen cooler in the entire system individually arrange by independent mould, the hydrogen-cooled device of hydrogen system module
Module inlet and outlet will bind a point.
As one of embodiment, respectively to excitation end in cooling procedure and the temperature of rotor and stator core at steam turbine end
Temperature carries out simulation calculation.
Hydrogen is used for cooling of generator rotor and stator core, the temperature of rotor at excitation end and steam turbine end is calculated respectively and is determined
Sub- iron core temperature, the cold hydrogen temperature of generator is calculated by hydrogen cooler, and generator hydrogen module only does simple weighted average.Hot hydrogen temperature
Degree is solved the differential form of open loop system energy equation to realize by lumped-parameter method.
As one of embodiment, according to pivoting friction heat, current loss and voltage loss, in cooling procedure
Generator quantity of heat production carries out simulation calculation.
Three parts of generator quantity of heat production point, pivoting friction heat, electrical loss (electric current), electrical loss (voltage).Wherein rotate
Frictional heat is linear with rotating speed, the linear relation of current loss and electric current, square line of voltage loss and voltage
Sexual intercourse.
Generator hydrogen_cooling rotor and stator core heat：
By convection heat transfer' heat-transfer by convection fundamental equation, consider further that Q is sought in the influence of hydrogen purity heat exchanging coefficient；
Therefore Q=* (W*K* (0.3+0.7*CH*CH))；
Wherein K：Coefficient, CH：Hydrogen purity, W：Circulation hydrogen amount.
Generator amature winding temperature：
Consider the thermal balance relation between the heat that generator amature winding temperature is taken away by quantity of heat production and circulating hydrogen.And
Rise speed is determined by generator virtual synchronous generator rotor quality.
Generator iron-core temperature：
Consider the thermal balance relation between the heat that generator iron-core winding temperature is taken away by quantity of heat production and circulating hydrogen.And
Rise speed is determined by generator virtual synchronous generator iron core quality.
Generator Hydrogen Vapor Pressure：
Gas is mainly made up of hydrogen, carbon dioxide and air in generator, is solved according to The Ideal-Gas Equation
Generator pressure.Consider influence of the generator-temperature detection to hydrogen pressure.
PV=nRT
Wherein：P is gas pressure intensity, unit Pa.V is gas volume, unit m3.N is the amount of the material of gas, unit mol.
T is system temperature, unit K.R is proportionality coefficient, and numerical value is different under different situations, and unit is J/ (molK).
Mole represent state equation in, R is proportionality constant, for any desired gas, R be it is certain, about
8.31441J/(mol·K)。
Hydrogen system leakage is calculated：
Hydrogen system leakage is made up of 4 parts.Normal leakage hydrogen, by NK_LEAK controls, if NK_LEAK is set to 0, just
Often operation is that leakage hydrogen amount is 0.The general NK_LEAK that sets is 11, represents that leakage hydrogen amount is 11 cubic metres (volume under normal pressure) daily.
When sealing oil pressure is low, then hydrogen can also be revealed, and amount of leakage is WALdis1 (vapour end) and WALdis2 (encouraging end), by hydrogen oil differential pressure
Determined with coefficient.Generator Hydrogen Leakage failure, amount of leakage is WALdis3, is determined by fault degree and coefficient.
As one of embodiment, according to hydrogen purity, carbon dioxide purity and aeroscope, in cooling procedure
Gas purity carries out simulation calculation in generator.
Gas purity calculates hydrogen purity, carbon dioxide purity and aeroscope respectively in generator.But also it is thin
3 kinds of gas components of top and bottom are divided, during as gas displacement, have had corresponding effect and embody.
During model buildings, in addition to necessary pipeline and valve, generator hydrogen module and 4 hydrogen coolers are pulled into respectively
Module, the hydrogen coolant interface of generator hydrogen module is consistent with the interface of hydrogen cooler module.
Then pre-processed：
Following parameter is set：Hydrogen inlet hydrogen purity, hydrogen inlet carbon dioxide purity, CO2 entrance CO2 purity, CO2
CO2 purity, hydrogen cooler flow, hydrogen cooler temperature, generator in hydrogen purity, generator in entrance H2 purity, generator
Iron core temperature, Generator Rotor Temperature, generator pressure (absolute pressure), generator thermal hydrogen temperature, the cold hydrogen temperature of generator, generator
The normal amount of leakage of electric current, generator voltage, generator, generator volume, rotating speed.
Emulated according to above-mentioned step, can obtain the cooling procedure simulation result of generator hydrogen cooling system, so
After generator hydrogen cooling system can be overhauled.
Compared with general technology, the repair method of generator hydrogen cooling system of the present invention, according to the Mathematical Modeling set up,
Cooling procedure to generator hydrogen cooling system is emulated.On the basis of simulation result, can be cold to generator hydrogen
But system is overhauled.The present invention can accurate simulation goes out and actual cooling ruuning situation is consistent result, reflect generating
The cooling process of machine, grasps the operating overview of real equipment.It is more accurate and comprehensively simulate the normal of generator cooling and
Accident ruuning situation so that simulation result preferably overhauls effect closer to field operational data so as to reach.
Fig. 2 is referred to, is the structural representation of the examination and repair system of generator hydrogen cooling system of the present invention.
The examination and repair system of generator hydrogen cooling system of the present invention, including set up module 201, emulation module 202 and maintenance
Module 203；
It is described to set up module 201, the Mathematical Modeling for setting up generator hydrogen cooling system；
The emulation module 202, for according to the Mathematical Modeling set up, the cooling to generator hydrogen cooling system
Process is emulated；
The maintenance module 203, for according to the simulation result, being overhauled to generator hydrogen cooling system.
Used as one of embodiment, the emulation module is respectively to excitation end in cooling procedure and the rotor temperature at steam turbine end
Degree and stator core temperature carry out simulation calculation.
Used as one of embodiment, the emulation module is right according to pivoting friction heat, current loss and voltage loss
Generator quantity of heat production in cooling procedure carries out simulation calculation.
Used as one of embodiment, the emulation module is right according to hydrogen purity, carbon dioxide purity and aeroscope
Gas purity carries out simulation calculation in generator in cooling procedure.
Compared with general technology, the examination and repair system of generator hydrogen cooling system of the present invention, according to the Mathematical Modeling set up,
Cooling procedure to generator hydrogen cooling system is emulated.On the basis of simulation result, can be cold to generator hydrogen
But system is overhauled.The present invention can accurate simulation goes out and actual cooling ruuning situation is consistent result, reflect generating
The cooling process of machine, grasps the operating overview of real equipment.It is more accurate and comprehensively simulate the normal of generator cooling and
Accident ruuning situation so that simulation result preferably overhauls effect closer to field operational data so as to reach.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Shield scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of repair method of generator hydrogen cooling system, it is characterised in that comprise the following steps：
Set up the Mathematical Modeling of generator hydrogen cooling system；
According to the Mathematical Modeling set up, the cooling procedure to generator hydrogen cooling system is emulated；
According to the simulation result, generator hydrogen cooling system is overhauled.
2. the repair method of generator hydrogen cooling system according to claim 1, it is characterised in that described to generator
The step of cooling procedure of hydrogen cooling system is emulated, comprises the following steps：
The temperature of rotor and stator core temperature to excitation end in cooling procedure and steam turbine end carry out simulation calculation respectively.
3. the repair method of generator hydrogen cooling system according to claim 1, it is characterised in that described to generator
The step of cooling procedure of hydrogen cooling system is emulated, comprises the following steps：
According to pivoting friction heat, current loss and voltage loss, emulation meter is carried out to the generator quantity of heat production in cooling procedure
Calculate.
4. the repair method of generator hydrogen cooling system according to claim 1, it is characterised in that described to generator
The step of cooling procedure of hydrogen cooling system is emulated, comprises the following steps：
According to hydrogen purity, carbon dioxide purity and aeroscope, gas purity in the generator in cooling procedure is imitated
It is true to calculate.
5. a kind of examination and repair system of generator hydrogen cooling system, it is characterised in that including setting up module, emulation module and maintenance
Module；
It is described to set up module, the Mathematical Modeling for setting up generator hydrogen cooling system；
The emulation module, for according to the Mathematical Modeling set up, the cooling procedure to generator hydrogen cooling system to be entered
Row emulation；
The maintenance module, for according to the simulation result, being overhauled to generator hydrogen cooling system.
6. the examination and repair system of generator hydrogen cooling system according to claim 5, it is characterised in that the emulation module
The temperature of rotor and stator core temperature to excitation end in cooling procedure and steam turbine end carry out simulation calculation respectively.
7. the examination and repair system of generator hydrogen cooling system according to claim 5, it is characterised in that the emulation module
According to pivoting friction heat, current loss and voltage loss, simulation calculation is carried out to the generator quantity of heat production in cooling procedure.
8. the examination and repair system of generator hydrogen cooling system according to claim 5, it is characterised in that the emulation module
According to hydrogen purity, carbon dioxide purity and aeroscope, emulation meter is carried out to gas purity in the generator in cooling procedure
Calculate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611074251.XA CN106777564A (en) | 2016-11-29 | 2016-11-29 | The repair method and system of a kind of generator hydrogen cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611074251.XA CN106777564A (en) | 2016-11-29 | 2016-11-29 | The repair method and system of a kind of generator hydrogen cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106777564A true CN106777564A (en) | 2017-05-31 |
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ID=58898655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611074251.XA Pending CN106777564A (en) | 2016-11-29 | 2016-11-29 | The repair method and system of a kind of generator hydrogen cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106777564A (en) |
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2016
- 2016-11-29 CN CN201611074251.XA patent/CN106777564A/en active Pending
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Application publication date: 20170531 |