CN112672594A - Method and system for predicting and monitoring inlet valve temperature of converter station valve cooling system - Google Patents
Method and system for predicting and monitoring inlet valve temperature of converter station valve cooling system Download PDFInfo
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Abstract
The invention discloses a method and a system for predicting and monitoring the inlet valve temperature of a converter station valve cooling system, which relate to the technical field of power system detectionsCooling water flow LfAir intake Q of cooling tower and ambient wet bulb temperature Tw(ii) a Constructing a valve inlet temperature prediction model according to the acquired physical quantity; and monitoring the heat exchange performance of the cooling tower of the converter valve according to the established inlet valve temperature prediction model. The invention judges the specific fault reason through the spray water flow, the cooling tower air inlet amount and the environment wet bulb temperature, sends out an alarm to remind the operator, and improves the operation reliability of the converter station valve cooling system。
Description
Technical Field
The invention relates to the technical field of power system detection, in particular to a method and a system for predicting and monitoring inlet valve temperature of a converter station valve cooling system.
Background
The converter valve is core equipment for AC/DC power conversion of a converter station, a current-carrying element of the converter valve can generate a large amount of heat during normal operation, one part of the generated heat is discharged to the outside by a cooling water circulation system, and the other part of the generated heat exchanges heat with air in a valve hall through natural convection.
The cooling tower cools the cooling water flowing out of the converter valve by the important heat exchange element of the cooling water circulation system, and then the cooled cooling water is sent to the converter valve to take away heat, and the heat exchange performance of the cooling tower is closely related to the normal operation of the converter valve element. If the heat exchange performance of the cooling tower is abnormal, the temperature of the cooling water inlet valve is increased, and the maximum value of the operation allowable temperature of the converter valve is reached in severe cases, so that the forced shutdown event of the direct-current system is caused.
The temperature of the cooling water inlet valve is an important index for reflecting the heat exchange performance of the cooling tower. The prior art lacks a monitoring system and method capable of accurately reflecting the temperature of a cooling water inlet valve.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method and a system for predicting and monitoring the inlet valve temperature of a converter station valve cooling system.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for predicting and monitoring the inlet valve temperature of a converter station valve cooling system comprises the following steps:
obtaining the direct current load rate P and the spray water flow L of the converter valvesCooling water flow LfAir intake Q of cooling tower and ambient wet bulb temperature Tw；
Constructing a valve inlet temperature prediction model according to the acquired physical quantity;
and monitoring the heat exchange performance of the cooling tower of the converter valve according to the established inlet valve temperature prediction model.
The method for predicting and monitoring the inlet valve temperature of the converter station valve cooling system further comprises the following steps:
Tin_pre＝A*P+B*Ls+C*Lf+D*Q+E*Tw+F
wherein A, B, C, D, E, F is a constant, P is the DC load factor,%; l issThe flow rate of spray water is kg/h; l isfCooling water flow in kg/h; q is the air intake of the cooling tower, kg/h; t iswAmbient wet bulb temperature, deg.C; t isin_preIs the predicted value of the inlet valve temperature of the cooling water at DEG C.
The method for predicting and monitoring the inlet valve temperature of the converter station valve cooling system further obtains the predicted value T of the inlet valve temperature of the cooling waterin_preWith the actual value T of the temperature of the cooling water inlet valvein_actCalculating the temperature deviation T of the cooling water inlet valvein_diffI.e. by
Tin_diff＝Tin_act-Tin_pre
When T isin_diffAnd when the value is larger than the basic set value K, sending out first alarm information.
The method for predicting and monitoring the inlet valve temperature of the valve cooling system of the converter station further comprises the step of passing the flow rate T of the spray water when the first alarm information is sent outwCooling water flow LfAir intake Q of cooling tower and ambient wet bulb temperature TwJudging specific fault elements: in particular, the amount of the solvent to be used,
if the flow rate T of the spray waterw<First set value K1Judging the fault reason is that the flow of spray water is lower than a set value, and sending out second alarm information;
if the cooling water flow Lf<Second set value K2Judging the fault reason is that the cooling water flow is lower than a set value, and sending out third alarm information;
if the air intake Q of the cooling tower<Third set value K3Judging the fault reason is that the tower inlet air volume of the cooling tower is lower than a set value, and sending out fourth warning information;
if Tw>K4Judging the fault reason is that the environmental wet bulb temperature is higher than a set value, and sending a fifth alarm message;
if the conditions are not met, judging the failure reason is other failures, and sending out fifth alarm information.
A system for predicting and monitoring the inlet valve temperature of a cooling system of a converter station valve comprises
The first acquisition unit is used for acquiring the direct current load rate P of the converter valve;
a second collecting unit for collecting the flow L of the shower waters；
A third collecting unit for collecting the flow rate L of cooling waterf；
The fourth acquisition unit is used for acquiring the air intake Q of the cooling tower;
fifth miningAn integrated unit for collecting ambient wet bulb temperature Tw；
A processing unit for constructing a valve-in temperature prediction model from the acquired physical quantity; and
and the warning unit is used for monitoring the heat exchange performance of the cooling tower of the converter valve according to the established inlet valve temperature prediction model.
The converter station valve cooling system inlet valve temperature predictive monitoring system as described above further comprises, in said processing unit,
the inlet valve temperature prediction model is as follows:
Tin_pre＝A*P+B*Ls+C*Lf+D*Q+E*Tw+F
wherein A, B, C, D, E, F is a constant, P is the DC load factor,%; l issThe flow rate of spray water is kg/h; l isfCooling water flow in kg/h; q is the air intake of the cooling tower, kg/h; t iswAmbient wet bulb temperature, deg.C; t isin_preIs the predicted value of the inlet valve temperature of the cooling water at DEG C.
The predictive converter station valve cooling system inlet valve temperature monitoring system as described above further comprises, in said alarm unit,
the obtained predicted value T of the inlet valve temperature of the cooling waterin_preWith the actual value T of the temperature of the cooling water inlet valvein_actCalculating the temperature deviation T of the cooling water inlet valvein_diffI.e. by
Tin_diff＝Tin_act-Tin_pre
When T isin_diffAnd when the value is larger than the basic set value K, sending out first alarm information.
The system for predicting and monitoring the inlet valve temperature of the valve cooling system of the converter station further comprises a spray water flow rate T in the alarm unit when the first alarm information is sent outwCooling water flow LfAir intake Q of cooling tower and ambient wet bulb temperature TwJudging specific fault elements: in particular, the amount of the solvent to be used,
if the flow rate T of the spray waterw<First set value K1Judging the cause of the fault as' spray water flowIf the value is lower than the set value, sending out second alarm information;
if the cooling water flow Lf<Second set value K2Judging the fault reason is that the cooling water flow is lower than a set value, and sending out third alarm information;
if the air intake Q of the cooling tower<Third set value K3Judging the fault reason is that the tower inlet air volume of the cooling tower is lower than a set value, and sending out fourth warning information;
if Tw>K4Judging the fault reason is that the environmental wet bulb temperature is higher than a set value, and sending a fifth alarm message;
if the conditions are not met, judging the failure reason is other failures, and sending out fifth alarm information.
The system for predicting and monitoring the inlet valve temperature of the converter station valve cooling system further comprises a direct current load factor P and a cooling water flow LfCollected by a sensor configured by the original valve cooling control system.
The inlet valve temperature predicting and monitoring system of the converter station valve cooling system, as described above, further, the flow rate L of the spray watersThe measurement was made at the cooling tower spray water inlet line using an ultrasonic flow meter.
The inlet valve temperature predictive monitoring system of the converter station valve cooling system is characterized in that an air inlet quantity Q of the cooling tower is measured at an inlet air position of the cooling tower by using an anemometer.
The inlet valve temperature predictive monitoring system of the converter station valve cooling system as described above, further, the ambient wet bulb temperature TwThe wet bulb temperature sensor is used to measure at the cooling tower inlet air.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a method for predicting the inlet valve temperature of cooling water of a valve cooling system of a converter station, designs a corresponding fault detection device, and is suitable for the inlet valve temperature prediction and the abnormality diagnosis of the cooling water of the valve cooling system of a high-voltage direct-current transmission system at home and abroad. The method adopts a multiple linear regression method based on the equipment mechanism to predict the inlet valve temperature of the cooling water, has simple realization process, high calculation speed and small prediction error, and is more suitable for occasions such as tablet machine program development of a cooling water inlet valve temperature measuring instrument, visual display of BI tools and the like. The method can identify the reasons of the cooling tower heat exchange performance reduction such as low spray water flow, low cooling tower inlet air volume, high environment wet bulb temperature and the like, remind operators to carry out fault detection and treatment in a targeted manner, ensure the safe and stable operation of the direct current transmission large channel, and has very high economic benefit and popularization and application value.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method of an embodiment of the present invention;
FIG. 2 is a logic diagram of the abnormal temperature detection of the inlet valve of the cooling water according to the embodiment of the present invention;
fig. 3 is a schematic diagram of a system for predictive monitoring of intake valve temperature according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example (b):
it should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, fig. 1 is a flow chart of a method of an embodiment of the present invention; FIG. 2 is a logic diagram of the abnormal temperature detection of the inlet valve of the cooling water according to the embodiment of the present invention; fig. 3 is a schematic diagram of a system for predictive monitoring of intake valve temperature according to an embodiment of the present invention.
A method for predicting and monitoring the inlet valve temperature of a converter station valve cooling system comprises the following steps:
obtaining the direct current load rate P and the spray water flow L of the converter valvesCooling water flow LfAir intake Q of cooling tower and ambient wet bulb temperature Tw；
Constructing a valve inlet temperature prediction model according to the acquired physical quantity;
and monitoring the heat exchange performance of the cooling tower of the converter valve according to the established inlet valve temperature prediction model.
As an alternative implementation, in some embodiments, the intake valve temperature prediction model is:
Tin_pre＝A*P+B*Ls+C*Lf+D*Q+E*Tw+F
wherein A, B, C, D, E, F is a constant, P is the DC load factor,%; l issThe flow rate of spray water is kg/h; l isfCooling water flow in kg/h; q is the air intake of the cooling tower, kg/h; t iswAmbient wet bulb temperature, deg.C; t isin_preIs the predicted value of the inlet valve temperature of the cooling water at DEG C.
As an alternative implementation, in some embodiments, the predicted value T of the inlet valve temperature of the cooling water is obtainedin_preWith the actual value T of the temperature of the cooling water inlet valvein_actCalculating the temperature deviation T of the cooling water inlet valvein_diffI.e. by
Tin_diff＝Tin_act-Tin_pre
When T isin_diffAnd when the value is larger than the basic set value K, sending out first alarm information.
As an optional implementation manner, in some embodiments, when the first warning message is issued, the flow rate T of the spray water is passedwCooling water flow LfAir intake Q of cooling tower and ambient wet bulb temperature TwJudging specific fault elements: in particular, the amount of the solvent to be used,
if the flow rate T of the spray waterw<First set value K1Judging the fault reason is that the flow of spray water is lower than a set value, and sending out second alarm information;
if the cooling water flow Lf<Second set value K2Judging the fault reason is that the cooling water flow is lower than a set value, and sending out third alarm information;
if the air intake Q of the cooling tower<Third set value K3Judging the fault reason is that the tower inlet air volume of the cooling tower is lower than a set value, and sending out fourth warning information;
if Tw>K4Judging the fault reason is that the environmental wet bulb temperature is higher than a set value, and sending a fifth alarm message;
if the conditions are not met, judging the failure reason is other failures, and sending out fifth alarm information.
A system for predicting and monitoring the inlet valve temperature of a cooling system of a converter station valve comprises
The first acquisition unit is used for acquiring the direct current load rate P of the converter valve;
a second collecting unit for collecting the flow L of the shower waters；
A third collecting unit for collecting the flow rate L of cooling waterf；
The fourth acquisition unit is used for acquiring the air intake Q of the cooling tower;
a fifth acquisition unit for acquiring the ambient wet bulb temperature Tw；
A processing unit for constructing a valve-in temperature prediction model from the acquired physical quantity; and
and the warning unit is used for monitoring the heat exchange performance of the cooling tower of the converter valve according to the established inlet valve temperature prediction model.
As an alternative implementation, in some embodiments, in the processing unit,
the inlet valve temperature prediction model is as follows:
Tin_pre＝A*P+B*Ls+C*Lf+D*Q+E*Tw+F
wherein A, B, C, D, E, F is a constant, P is the DC load factor,%; l issThe flow rate of spray water is kg/h; l isfCooling water flow in kg/h; q is the air intake of the cooling tower, kg/h; t iswAmbient wet bulb temperature, deg.C; t isin_preIs the predicted value of the inlet valve temperature of the cooling water at DEG C.
As an alternative implementation, in some embodiments, in the alarm unit,
the obtained predicted value T of the inlet valve temperature of the cooling waterin_preWith the actual value T of the temperature of the cooling water inlet valvein_actCalculating the temperature deviation T of the cooling water inlet valvein_diffI.e. by
Tin_diff＝Tin_act-Tin_pre
When T isin_diffAnd when the value is larger than the basic set value K, sending out first alarm information.
As an optional implementation manner, in some embodiments, in the alarm unit, when the first alarm information is sent out, the flow rate T of the shower water is passedwCooling water flow LfAir intake Q of cooling tower and ambient wet bulb temperature TwJudging specific fault elements: in particular, the amount of the solvent to be used,
if the flow rate T of the spray waterw<First set value K1Judging the fault reason is that the flow of spray water is lower than a set value, and sending out second alarm information;
if the cooling water flow Lf<Second set value K2Judging the fault reason is that the cooling water flow is lower than a set value, and sending out third alarm information;
if the air intake Q of the cooling tower<Third set value K3Judging the fault reason is that the tower inlet air volume of the cooling tower is lower than a set value, and sending out fourth warning information;
if Tw>K4Judging the fault reason is that the environmental wet bulb temperature is higher than a set value, and sending a fifth alarm message;
if the conditions are not met, judging the failure reason is other failures, and sending out fifth alarm information.
As an alternative embodiment, in some embodiments, the DC duty P and the cooling water flow LfCollected by a sensor configured by the original valve cooling control system.
As an alternative embodiment, in some embodiments, the shower water flow LsThe measurement was made at the cooling tower spray water inlet line using an ultrasonic flow meter.
As an alternative embodiment, in some embodiments, the cooling tower inlet air rate Q is measured at the cooling tower inlet air using an anemometer.
As an alternative embodiment, in certain embodiments, the ambient wet bulb temperature TwThe wet bulb temperature sensor is used to measure at the cooling tower inlet air.
In a particular embodiment of the present invention,
s1: input sample data set X ═ { P, L ═s、Lf、Q、Tw、Tin_act}, calculating a multiple linear regression formula Tin_pre＝A*P+B*Ls+C*Lf+D*Q+E*TwA constant A, B, C, D, E, F for + F.
Wherein, P is the direct current load rate,%; l issThe flow rate of spray water is kg/h; l isfCooling water flow in kg/h; q is the air intake of the cooling tower, kg/h; t iswAmbient wet bulb temperature, deg.C; t isin_actThe actual value of the inlet valve temperature of the cooling water is DEG C; t isin_preIs the predicted value of the inlet valve temperature of the cooling water at DEG C.
Taking a certain +/-800 kV converter station as an example, A is 2.875 ℃ and/%, B is 0.00528 ℃ and min/kg, C is 0.0006 ℃ and min/kg, D is 0.0066 ℃ and min/kg, E is 0.478, and F is 18.811 ℃.
S2: input measurement data set Y ═ { P, L ═s、Lf、Q、Tw}. Wherein, the DC load factor P and the cooling water flow LfCollected by a sensor configured by a valve cooling control system, and the flow L of spray watersAn ultrasonic flowmeter is used for measuring at a spray water inlet pipeline of a cooling tower, the air intake Q of the cooling tower is measured at an air inlet of the cooling tower by an anemometer, and the ambient wet bulb temperature TwThe wet bulb temperature sensor is used to measure at the cooling tower inlet air.
Through Tin_pre＝A*P+B*Ls+C*Lf+D*Q+E*TwThe + F formula calculates the predicted value Tin _ pre of the cooling water inlet valve temperature. Calculating the deviation T between the actual value and the predicted value of the inlet valve temperature of the cooling waterin_diff＝Tin_act-Tin_pre. When T isin_diffWhen the temperature of the cooling water inlet valve is higher than the fixed value K, a warning of high temperature of the cooling water inlet valve is sent.
Taking a certain +/-800 kV converter station as an example, the high constant value K of the inlet valve temperature of the cooling water is 1.05Tin_pre。
S3: further, when the alarm of high temperature of the cooling water inlet valve occurs, the flow L of the spraying water is passedsCooling water flow LfAir intake Q of cooling tower and ambient wet bulb temperature TwJudging specific fault elements: if L iss<K1Judging the fault reason as 'low spray water flow'; if L isf<K2Judging the fault reason as 'low cooling water flow'; if Q<K3Judging the fault reason is 'the tower inlet air quantity of the cooling tower is low'; if Tw>K4Judging the fault cause is 'high environment wet bulb temperature'; if the above conditions are not met, the fault reason is judged to be other faults.
Take a certain +/-800 kV converter station as an example, K1＝0.9*Ls_n，K2＝0.9*Lf_n，K3＝0.9*Qn，K4＝0.9*Tw_n. Wherein L iss_nThe design value of the flow of the spray water is kg/h; l isf_nDesigning the cooling water flow rate, kg/h; qnThe design value of the air inlet quantity of the cooling tower is kg/h; t isw_nIs the designed value of the environmental wet bulb temperature, DEG C.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (10)
1. A method for predicting and monitoring the inlet valve temperature of a converter station valve cooling system is characterized by comprising the following steps:
obtaining the direct current load rate P and the spray water flow L of the converter valvesCooling water flow LfAir intake Q of cooling tower and ambient wet bulb temperature Tw；
Constructing a valve inlet temperature prediction model according to the acquired physical quantity;
and monitoring the heat exchange performance of the cooling tower of the converter valve according to the established inlet valve temperature prediction model.
2. The predictive monitoring method of inlet valve temperature for a converter station valve cooling system of claim 1, wherein the inlet valve temperature predictive model is:
Tin_pre＝A*P+B*Ls+C*Lf+D*Q+E*Tw+F
wherein A, B, C, D, E, F is a constant, P is the DC load factor,%; l issThe flow rate of spray water is kg/h; l isfCooling water flow in kg/h; q is the air intake of the cooling tower, kg/h; t iswAmbient wet bulb temperature, deg.C; t isin_preIs the predicted value of the inlet valve temperature of the cooling water at DEG C.
3. The predictive monitoring method of inlet valve temperature for a valve cooling system of a converter station according to claim 2, characterized in that the predictive value T of inlet valve temperature of cooling water to be obtained isin_preWith the actual value T of the temperature of the cooling water inlet valvein_actCalculating the temperature deviation T of the cooling water inlet valvein_diffI.e. by
Tin_diff＝Tin_act-Tin_pre
When T isin_diffAnd when the value is larger than the basic set value K, sending out first alarm information.
4. The predictive monitoring method of inlet valve temperature of a valve cooling system of a converter station according to claim 3, characterized in that when said first warning message is issued, the flow rate T of water through spraying is determinedwCooling water flow LfAir intake Q of cooling tower and ambient wet bulb temperature TwJudging specific fault elements: in particular, the amount of the solvent to be used,
if the flow rate T of the spray waterw<First set value K1Judging the fault reason is that the flow of spray water is lower than a set value, and sending out second alarm information;
if the cooling water flow Lf<Second set value K2Judging the fault reason is that the cooling water flow is lower than a set value, and sending out third alarm information;
if the air intake Q of the cooling tower<Third set value K3Judging the fault reason is that the tower inlet air volume of the cooling tower is lower than a set value, and sending out fourth warning information;
if Tw>K4To judge the origin of the faultSending a fifth alarm message because the environment wet bulb temperature is higher than the set value;
if the conditions are not met, judging the failure reason is other failures, and sending out fifth alarm information.
5. A system for predicting and monitoring inlet valve temperature of a converter station valve cooling system is characterized by comprising
The first acquisition unit is used for acquiring the direct current load rate P of the converter valve;
a second collecting unit for collecting the flow L of the shower waters；
A third collecting unit for collecting the flow rate L of cooling waterf；
The fourth acquisition unit is used for acquiring the air intake Q of the cooling tower;
a fifth acquisition unit for acquiring the ambient wet bulb temperature Tw；
A processing unit for constructing a valve-in temperature prediction model from the acquired physical quantity; and
the warning unit is used for monitoring the heat exchange performance of the cooling tower of the converter valve according to the established inlet valve temperature prediction model;
in the processing unit, the processing unit is provided with a plurality of processing units,
the inlet valve temperature prediction model is as follows:
Tin_pre＝A*P+B*Ls+C*Lf+D*Q+E*Tw+F
wherein A, B, C, D, E, F is a constant, P is the DC load factor,%; l issThe flow rate of spray water is kg/h; l isfCooling water flow in kg/h; q is the air intake of the cooling tower, kg/h; t iswAmbient wet bulb temperature, deg.C; t isin_preThe predicted value of the inlet valve temperature of the cooling water is DEG C;
in the case of the alarm unit,
the obtained predicted value T of the inlet valve temperature of the cooling waterin_preWith the actual value T of the temperature of the cooling water inlet valvein_actCalculating the temperature deviation T of the cooling water inlet valvein_diffI.e. by
Tin_diff＝Tin_act-Tin_pre
When T isin_diffAnd when the value is larger than the basic set value K, sending out first alarm information.
6. The predictive converter station valve inlet temperature monitoring system according to claim 7, characterized in that in said alarm unit, when said first alarm message is issued, the flow rate T of spray water is passedwCooling water flow LfAir intake Q of cooling tower and ambient wet bulb temperature TwJudging specific fault elements: in particular, the amount of the solvent to be used,
if the flow rate T of the spray waterw<First set value K1Judging the fault reason is that the flow of spray water is lower than a set value, and sending out second alarm information;
if the cooling water flow Lf<Second set value K2Judging the fault reason is that the cooling water flow is lower than a set value, and sending out third alarm information;
if the air intake Q of the cooling tower<Third set value K3Judging the fault reason is that the tower inlet air volume of the cooling tower is lower than a set value, and sending out fourth warning information;
if Tw>K4Judging the fault reason is that the environmental wet bulb temperature is higher than a set value, and sending a fifth alarm message;
if the conditions are not met, judging the failure reason is other failures, and sending out fifth alarm information.
7. The predictive converter station valve inlet temperature monitoring system of claim 5, wherein the DC load factor P and the cooling water flow L are selected from the group consisting offCollected by a sensor configured by the original valve cooling control system.
8. The predictive converter station valve inlet temperature monitoring system of claim 5, wherein the spray water flow LsThe measurement was made at the cooling tower spray water inlet line using an ultrasonic flow meter.
9. The predictive converter station valve inlet temperature monitoring system of claim 5, wherein the cooling tower inlet air rate Q is measured at the cooling tower inlet air using an anemometer.
10. The predictive converter station valve inlet temperature monitoring system of claim 5, wherein the ambient wet bulb temperature TwThe wet bulb temperature sensor is used to measure at the cooling tower inlet air.
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| CN113762391A (en) * | 2021-09-08 | 2021-12-07 | 中国南方电网有限责任公司超高压输电公司昆明局 | State detection method and device of cooling system, computer equipment and storage medium |
| CN117996602A (en) * | 2023-12-11 | 2024-05-07 | 国网湖北省电力有限公司直流公司 | Energy management method based on flexible direct current converter station valve external cold water system |
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Application publication date: 20210416 Assignee: Guangzhou Daokedao Automation Equipment Co.,Ltd. Assignor: GUANGZHOU BUREAU OF EXTRA HIGH VOLTAGE TRANSMISSION COMPANY OF CHINA SOUTHERN POWER GRID Co.,Ltd. Contract record no.: X2023990000432 Denomination of invention: Method and System for Predicting and Monitoring the Inlet Valve Temperature of the Valve Cooling System in a Converter Station Granted publication date: 20220408 License type: Common License Record date: 20230424 |
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