CN104820727A - Simulation method and device of power generator hydrogen cooling system - Google Patents
Simulation method and device of power generator hydrogen cooling system Download PDFInfo
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- CN104820727A CN104820727A CN201510053710.5A CN201510053710A CN104820727A CN 104820727 A CN104820727 A CN 104820727A CN 201510053710 A CN201510053710 A CN 201510053710A CN 104820727 A CN104820727 A CN 104820727A
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Abstract
The invention discloses a simulation method and a device of a power generator hydrogen cooling system. A result consistent with an actual operation condition of a thermal power plant can be accurately simulated based on a DCOSE (Distributed Component Oriented Simulation Environment) real-time simulation platform in a graphical example manner. A graphical example provides a good human-computer interaction manner, and can visually reflect a cooling flow of a power generator. With the adoption of the method and the device, operation overview of actual equipment can be well known; on-site normal and fault operation conditions can be simulated; a computed result is close to on-site operation data; and a 1:1 simulation effect can be achieved.
Description
Technical field
The present invention relates to technical field of generators, particularly relate to a kind of emulation mode and device of generator hydrogen cooling system.
Background technology
Along with the high speed development of China's power industry, the unit of Large Copacity, high parameter becomes main flow, the parameter of generator is also more and more higher, and the monitoring of the cooling system of generator to unit operation also become thereupon more important, this just has higher requirement to the modeling of replicating machine and computational accuracy.
Summary of the invention
Based on above-mentioned situation, the present invention proposes a kind of emulation mode and device of generator hydrogen cooling system, make the model of foundation more lively, result of calculation is more accurate.For this reason, the technical scheme of employing is as follows.
An emulation mode for generator hydrogen cooling system, comprises step:
From generator hydrogen cooling system, choose physical object to be emulated;
Under DCOSE platform, build generator hydrogen cooling system model, this model is made up of selected physical object;
For the various parameters of generator hydrogen cooling system, empirically value or measured value are arranged parameter corresponding in built model;
Utilize the model built, the target component of calculating generator hydrogen cooling system.
A simulator for generator hydrogen cooling system, comprising:
Object select module, for from generator hydrogen cooling system, chooses physical object to be emulated;
Model buildings module, under DCOSE platform, build generator hydrogen cooling system model, this model is made up of selected physical object;
Parameter setting module, for the various parameters to generator hydrogen cooling system, empirically value or measured value are arranged parameter corresponding in built model;
Parameter calculating module, for utilizing built model, the target component of calculating generator hydrogen cooling system.
The emulation mode of generator hydrogen cooling system of the present invention and device, based on DCOSE real-time simulation platform, adopt the mode of graphical example, can simulate the result consistent with thermal power plant practical operation situation accurately.Graphical example provides the mode of good man-machine interaction, the cooling process reflecting generator that can be vivid, use this method and device better can understand the running overview of real equipment, and situation that is normally on-the-spot and failure operation can be simulated, result of calculation more presses close to on-the-spot service data, can reach the simulated effect of 1 to 1.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the emulation mode of generator hydrogen cooling system of the present invention;
Fig. 2 is model buildings schematic diagram;
Fig. 3 is optimum configurations interface sectional drawing;
Fig. 4 is the structural representation of the simulator of generator hydrogen cooling system of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is described in further detail.Should be appreciated that embodiment described herein only in order to explain the present invention, do not limit protection scope of the present invention.
Vividly, the graphical example of image can make slip-stick artist faster, better and actual physical object connect, shorten the modeling work time in real-time simulation and reduce the difficulty of modeling, and the man-machine interactive platform of close friend can reduce the debug time of slip-stick artist, thus replicating machine is come into operation faster, user can more early be trained, enhancement training effect.Accurate real-time simulated animation method more accurately, comprehensively can simulate the normal of generator cooling and accident ruuning situation, thus reaches better result of training.Therefore, the present invention proposes a kind of emulation mode of generator hydrogen cooling system, as shown in Figure 1, comprise the steps.
Step s101, from generator hydrogen cooling system, choose physical object to be emulated;
Step s102, under DCOSE platform, build generator hydrogen cooling system model, this model is made up of selected physical object;
Step s103, various parameters for generator hydrogen cooling system, empirically value or measured value are arranged parameter corresponding in built model;
The model that step s104, utilization are built, the target component of calculating generator hydrogen cooling system.
DCOSE (Distributed Component Simulation Environment) system is the integrative simulation back-up environment software that Tsing-Hua University's energy emulation company (purple light Zhi Kong Science and Technology Ltd.) researches and develops, it have employed Microsoft.Net architecture design, for the occasion that large-scale strong coupling and fine granularity calculate, typical application is Power Plant Simulation System.
The simulation process of generator hydrogen cooling system physical object is as follows:
Hydrogen controls row---source point;
CO2 controls row---source point;
Circulating fan---a consideration circulating fan whether power transmission in this method, power transmission then FAN.VV is 1, otherwise is 0.Script controlling FAN.VV is then needed as needed more detailed emulation;
Dehydrating unit---do not emulate, cannot without algorithm without module;
Profit detecting alarm (leakage detection apparatus)---do not emulate, (if needed, realize with script without algorithm without module; Or make separately a purity analysis instrument mould to realize);
Purity analysis instrument---hydrogen purity directly uses the purity signal of generator hydrogen module (if needed, to realize with script; Or make separately a purity analysis instrument mould to realize);
Hydrogen humidity instrument---hydrogen humidity does not calculate, hydrogen humidity in system directly puts number, and (then script realizes if needed, or do separately a hygronom module again), hydrogen humidity dew point of hydrogen represents, under the pressure working condition of 0.3MPa, dew point of hydrogen will control at-5 ~-25 DEG C;
Hydrogen cooler---hydrogen cooler in the entire system independent mould is arranged separately, and hydrogen-cooled device module inlet and the outlet of hydrogen system module will bind a point.
During model buildings, except the pipeline of necessity and valve, each module pulls generator hydrogen module and 4 hydrogen cooler modules respectively into, and the hydrogen coolant interface of generator hydrogen module is consistent with the interface of hydrogen cooler module.
As shown in Figure 3, arrange as follows to the parameters in built generator hydrogen cooling system model:
Target component and the computing method thereof of generator hydrogen cooling system are described below.
1, the cold hydrogen temperature of generator is calculated by hydrogen cooler, and generator hydrogen module only does simple weighted average.
2, hot hydrogen temperature is by lumped-parameter method, and the differential form solving open loop system energy equation realizes.
dQ＝d(M·T·Cv)
Wherein: Q: gas gross energy in generator
M: gas gross mass in generator
T: gas temperature (hot hydrogen temperature) in generator
Cv: specific heat at constant volume (the average weighted method of total specific heat capacity is obtained)
Solve this total differential equation:
Obtain temperature T
3, generator quantity of heat production calculates
Generator quantity of heat production divides three parts, and pivoting friction heat-dissipating, electrical loss (electric current), electrical loss (voltage) are respectively Qrtrfrt, Qrtrcur, Qironvlt,
Wherein Qrtrfrt and rotating speed linear---XQrtrfrt=KQ1*XSP*XSP
Linear relation---the XQrtrcur=KQ2*IV/1000*IV/1000 of Qrtrcur and electric current
Linear relation---the XQironvlt=KQ3*VV*VV of Qironvlt and voltage
4, generator hydrogen_cooling rotor and stator core heat
This emulation mode by convection heat transfer' heat-transfer by convection fundamental equation, then considers that Q is asked in the impact of hydrogen purity heat transfer coefficient,
Therefore Q=Δ t* (W*K* (0.3+0.7*CH*CH))
Wherein Δ t; Arithmetic mean temperature difference
K: coefficient
CH: hydrogen purity
W: circulation hydrogen amount
5, generator amature winding temperature
Consider the thermal equilibrium relation between the heat that generator amature winding temperature is taken away by quantity of heat production and circulating hydrogen, and the speed that goes up is determined by generator virtual synchronous generator rotor quality.
6, generator iron-core temperature
Consider the thermal equilibrium relation between the heat that generator iron-core winding temperature is taken away by quantity of heat production and circulating hydrogen, and the speed that goes up is determined by generator virtual synchronous generator iron core quality.
7, generator Hydrogen Vapor Pressure
In generator, gas is primarily of hydrogen, carbon dioxide and air composition, solves generator pressure according to the Ideal-Gas Equation.Consider the impact of generator-temperature detection on hydrogen pressure.
pV＝nRT
Wherein: p is gas pressure intensity, unit Pa.
V is gas volume, unit m3.
N is the amount of substance of gas, unit mol
T is system temperature, unit K.
R is scale-up factor, and under different situation, numerical value is different, and unit is J/ (molK)
In mole state equation represented, R is proportionality constant, and for any desired gas, R is certain, is about 8.31441J/ (molK)
8, hydrogen system is revealed and is calculated
Hydrogen system is revealed and is made up of 4 parts:
Normal leakage hydrogen, is controlled by NK_LEAK, if NK_LEAK is set to 0, then normal operation is leakage hydrogen amount is 0.Generally arranging NK_LEAK is 11, represents that leaking hydrogen amount every day is 11 cubic metres (volumes under normal pressure).
When sealing oil pressure is low, then hydrogen also can be revealed, and amount of leakage is WALdis1 (steam turbine end) and WALdis2 (excitation end), is determined by hydrogen oil differential pressure and coefficient.
Generator Hydrogen Leakage fault, amount of leakage is WALdis3, is determined by fault degree and coefficient.
9, hydrogen purity
In generator, gas purity calculates hydrogen purity, carbon dioxide purity and aeroscope respectively, but also has segmented 3 kinds of gas compositions of top and bottom, during as gas displacement, has corresponding effect and embodies.
The simulator of generator hydrogen cooling system of the present invention is the system corresponding with above-mentioned emulation mode, as shown in Figure 4, comprising:
Object select module, for from generator hydrogen cooling system, chooses physical object to be emulated;
Model buildings module, under DCOSE platform, build generator hydrogen cooling system model, this model is made up of selected physical object;
Parameter setting module, for the various parameters to generator hydrogen cooling system, empirically value or measured value are arranged parameter corresponding in built model;
Parameter calculating module, for utilizing built model, the target component of calculating generator hydrogen cooling system.
As a preferred embodiment, the physical object that described object select module is chosen comprises hydrogen and controls row, CO2 control row and hydrogen cooler.
As a preferred embodiment, the parameter set by described parameter setting module comprises:
Hydrogen inlet hydrogen purity;
Hydrogen inlet carbon dioxide purity;
CO2 entrance CO2 purity;
CO2 entrance H2 purity;
Hydrogen purity in generator;
CO2 purity in generator;
Hydrogen cooler flow;
Hydrogen cooler temperature;
Generator iron-core temperature;
Generator Rotor Temperature;
Generator pressure;
The hot hydrogen temperature of generator;
The cold hydrogen temperature of generator;
Dynamo current;
Generator voltage;
Generator hydrogen leak amount;
Generator volume;
And
Generator speed.
As a preferred embodiment, the target component that described parameter calculating module calculates comprises:
The cold hydrogen temperature of generator;
The hot hydrogen temperature of generator;
Generator quantity of heat production;
Generator hydrogen_cooling rotor and stator core heat;
Generator amature winding temperature;
Generator iron-core temperature;
Generator Hydrogen Vapor Pressure;
Generator hydrogen gas leakage amount;
And
Generator hydrogen purity.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. an emulation mode for generator hydrogen cooling system, is characterized in that, comprises step:
From generator hydrogen cooling system, choose physical object to be emulated;
Under DCOSE platform, build generator hydrogen cooling system model, this model is made up of selected physical object;
For the various parameters of generator hydrogen cooling system, empirically value or measured value are arranged parameter corresponding in built model;
Utilize the model built, the target component of calculating generator hydrogen cooling system.
2. the emulation mode of generator hydrogen cooling system according to claim 1, is characterized in that,
The physical object chosen comprises hydrogen and controls row, CO2 control row and hydrogen cooler.
3. the emulation mode of generator hydrogen cooling system according to claim 1 and 2, is characterized in that,
Set parameter comprises:
Hydrogen inlet hydrogen purity;
Hydrogen inlet carbon dioxide purity;
CO2 entrance CO2 purity;
CO2 entrance H2 purity;
Hydrogen purity in generator;
CO2 purity in generator;
Hydrogen cooler flow;
Hydrogen cooler temperature;
Generator iron-core temperature;
Generator Rotor Temperature;
Generator pressure;
The hot hydrogen temperature of generator;
The cold hydrogen temperature of generator;
Dynamo current;
Generator voltage;
Generator hydrogen leak amount;
Generator volume;
And
Generator speed.
4. the emulation mode of generator hydrogen cooling system according to claim 1 and 2, is characterized in that,
The target component calculated comprises:
The cold hydrogen temperature of generator;
The hot hydrogen temperature of generator;
Generator quantity of heat production;
Generator hydrogen_cooling rotor and stator core heat;
Generator amature winding temperature;
Generator iron-core temperature;
Generator Hydrogen Vapor Pressure;
Generator hydrogen gas leakage amount;
And
Generator hydrogen purity.
5. a simulator for generator hydrogen cooling system, is characterized in that, comprising:
Object select module, for from generator hydrogen cooling system, chooses physical object to be emulated;
Model buildings module, under DCOSE platform, build generator hydrogen cooling system model, this model is made up of selected physical object;
Parameter setting module, for the various parameters to generator hydrogen cooling system, empirically value or measured value are arranged parameter corresponding in built model;
Parameter calculating module, for utilizing built model, the target component of calculating generator hydrogen cooling system.
6. the simulator of generator hydrogen cooling system according to claim 6, is characterized in that,
The physical object that described object select module is chosen comprises hydrogen and controls row, CO2 control row and hydrogen cooler.
7. the simulator of the generator hydrogen cooling system according to claim 5 or 6, is characterized in that,
Parameter set by described parameter setting module comprises:
Hydrogen inlet hydrogen purity;
Hydrogen inlet carbon dioxide purity;
CO2 entrance CO2 purity;
CO2 entrance H2 purity;
Hydrogen purity in generator;
CO2 purity in generator;
Hydrogen cooler flow;
Hydrogen cooler temperature;
Generator iron-core temperature;
Generator Rotor Temperature;
Generator pressure;
The hot hydrogen temperature of generator;
The cold hydrogen temperature of generator;
Dynamo current;
Generator voltage;
Generator hydrogen leak amount;
Generator volume;
And
Generator speed.
8. the simulator of the generator hydrogen cooling system according to claim 5 or 6, is characterized in that,
The target component that described parameter calculating module calculates comprises:
The cold hydrogen temperature of generator;
The hot hydrogen temperature of generator;
Generator quantity of heat production;
Generator hydrogen_cooling rotor and stator core heat;
Generator amature winding temperature;
Generator iron-core temperature;
Generator Hydrogen Vapor Pressure;
Generator hydrogen gas leakage amount;
And
Generator hydrogen purity.
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| CN113408104A (en) * | 2021-05-24 | 2021-09-17 | 中核核电运行管理有限公司 | Method and device for calculating real-time hydrogen leakage rate of generator |
| CN113569186A (en) * | 2021-07-28 | 2021-10-29 | 东方电气集团东方电机有限公司 | Method for calculating opening degree of cooling water valve |
| CN113803638A (en) * | 2021-07-30 | 2021-12-17 | 华电电力科学研究院有限公司 | Intelligent generator hydrogen cooling system and control method |
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| CN113569186A (en) * | 2021-07-28 | 2021-10-29 | 东方电气集团东方电机有限公司 | Method for calculating opening degree of cooling water valve |
| CN113569186B (en) * | 2021-07-28 | 2023-09-29 | 东方电气集团东方电机有限公司 | Method for calculating opening of cooling water valve |
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Application publication date: 20150805 |