CN112105240B - Method, system and equipment for adjusting operation condition of power equipment of converter valve cooling system - Google Patents
Method, system and equipment for adjusting operation condition of power equipment of converter valve cooling system Download PDFInfo
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- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
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- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
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Abstract
The invention discloses a method, a system and equipment for adjusting the operation condition of power equipment of a converter valve cooling system, wherein the method comprises the following steps: acquiring environmental data and operation load; obtaining optimal circulating pump flow and optimal cooling fan air volume according to the relationship between the environmental data and the operation load and the circulating pump flow and the relationship between the environmental data and the operation load and the cooling fan air volume; acquiring the current rotating speed of a circulating pump and the power of a cooling fan, namely the current working condition of the power equipment, comparing the current working condition of the power equipment with the optimal working condition of the power equipment, and if the comparison result is inconsistent, adjusting the current working condition of the power equipment to the optimal working condition of the power equipment; in the operation process of the converter valve, dynamic adjustment can be carried out on power equipment according to the environment data and the operation load monitored in real time, the extreme working conditions possibly occurring in the operation process of the converter valve can be judged in advance, appropriate margin can be ensured to be reserved, and the requirement of economy is met.
Description
Technical Field
The invention belongs to the technical field of high-voltage direct-current transmission converter valve cooling, and particularly relates to a method, a system and equipment for adjusting the operation condition of power equipment of a converter valve cooling system.
Background
The converter valve is a direct device for alternating current and direct current conversion, and consists of components such as a thyristor, a damping capacitor, a voltage-sharing capacitor, a damping resistor, a voltage-sharing resistor, a saturable reactor, a thyristor control unit and the like, the components are multiple, the structure is complex, various components can generate a large amount of heat in the operation process, and the capacity of a cooling system of the converter valve is very important. In order to ensure the safe and reliable operation of the converter valve, aiming at the structure of the converter valve, the cooling mode adopted in the actual engineering is a mode of combining an internal cooling system and an external cooling system. The existing engineering converter valve inner cooling system adopts a water cooling mode, a valve cooling system cooling medium circulates through an inner cooling system main circulating pump, enters outdoor heat exchange equipment, brings heat generated by a converter valve to the outdoor for heat exchange, brings the heat out, and circulates into the converter valve after cooling liquid is cooled to form a closed circulation cooling system. Outdoor heat exchange is the outer cooling system promptly, and the outer cooling of convertor station is mostly air cooling system, adopts complete sets of fan to cool off the water-cooling pipeline promptly, assists with outer spraying system again, improves the cooling capacity.
The converter valve cooling system mainly comprises a cooling pipeline, a radiator, power equipment and the like, wherein the power equipment mainly comprises a main circulating pump of an inner cooling system and a heat radiation fan of an outer cooling system. For a given converter valve cooling system, the operating conditions of the power plant are critical factors in determining its cooling capacity. Since the environment and climate around the converter valves and their own operating load are constantly changing, the heat dissipation of the converter valves, i.e. the cooling demand, is dynamic, and it is therefore necessary to meet the cooling demand of the converter valves by dynamically adjusting the operating conditions of the power plant.
The method comprises the steps that in the actual operation process of the converter valve, whether the operation working condition of the power equipment meets the heat dissipation requirement or not is judged by monitoring the temperature of the inlet and the outlet of the valve, when the temperature of the inlet and the outlet of the valve is abnormal under extreme conditions, a worker can adjust the power of the power equipment according to own experience, so that delay exists in operation, the adjustment error is too large only according to the experience, the service life of electronic components can be influenced because the converter valve cannot be cooled in time, the function of the whole converter valve is influenced, even if the adjustment of the power equipment can meet the cooling requirement, the condition that the margin is too large can still exist, and unnecessary electric energy consumption is caused. In actual operation, in order to meet the cooling requirement of the converter valve in most cases, the power equipment in the cooling system is often operated at a higher power, and the performance of the waste of electric energy completely does not meet the requirement of economic operation.
Disclosure of Invention
In order to solve the problems that the advance judgment, the accurate adjustment and the economic operation cannot be realized, the invention provides the method and the system for intelligently adjusting the operation condition of the power equipment in the converter valve cooling system, which can realize the normal operation of the converter valve under the conditions of variable operation load and complex environment and are beneficial to improving the saving of electric power resources.
In order to achieve the purpose, the invention adopts the technical scheme that the method for adjusting the operation condition of the power equipment in the converter valve cooling system comprises the following steps:
acquiring environmental data and operation load;
obtaining optimal circulating pump flow and optimal cooling fan air volume according to the relationship between the environmental data and the operating load and the circulating pump flow and the relationship between the environmental data and the operating load and the cooling fan air volume;
acquiring the current circulating pump flow and the air volume of a cooling fan, namely the current power equipment working condition, comparing the current power equipment working condition with the optimal power equipment working condition, and if the comparison result is inconsistent, adjusting the current power equipment working condition to the optimal power equipment working condition;
the relationship between the environmental data and the operation load and the flow of the circulating pump and the relationship between the environmental data and the operation load and the air quantity of the cooling fan are obtained by the following steps:
step 1, constructing a converter valve tower model, a valve tower model containing an internal cooling circulating pipeline and an external cooling system radiator model;
when a converter valve tower model, a valve tower model containing an inner cooling circulating pipeline and an outer cooling heat dissipation system model are built, geometric models of the converter valve tower model, the valve tower model containing the inner cooling circulating pipeline and the outer cooling heat dissipation system model are respectively built, then a physical model is built based on the geometric models, and when the geometric models are built, geometric modeling is completed and meshes are divided on the basis of determining model prototypes and simplifying principles; when a physical model is built, a converter valve tower model, a valve tower model containing an internal cooling circulating pipeline and an external cooling system radiator model are added with a heat exchange additional model during building; when constructing a radiator model of an external cooling system, adding a cooling fan model in physical modeling;
step 2, calculating to obtain the relationship between the environmental data and the operation load and the flow of the circulating pump and the relationship between the environmental data and the operation load and the air volume of the cooling fan based on the environmental data and the operation load and the converter valve tower model, the valve tower model containing the inner cooling circulating pipeline and the radiator model of the outer cooling system in the step 1; the method comprises the following specific steps:
inputting the environmental data and the operation load into a converter valve tower model to calculate to obtain a thermal load value;
establishing a relation between the environmental data and the operation load and the thermal load value, namely a first relation, according to the environmental data, the operation load and the thermal load value;
setting the converter valve inlet temperature, inputting the heat load value and the converter valve inlet temperature into a valve tower model containing an internal cooling circulating pipeline to calculate to obtain the circulating pump flow and the converter valve outlet temperature under the condition of meeting the cooling requirement; establishing a relation between the heat load value and the flow of the circulating pump and the temperature of the outlet of the converter valve, namely a second relation;
combining the first relation and the second relation to obtain a third relation between the environmental data and the relation between the operation load and the flow of the circulating pump and the temperature of the outlet of the converter valve;
inputting the converter valve outlet temperature and the converter valve inlet temperature into an external cooling system radiator model for calculation to obtain the fan air volume meeting the inlet and outlet temperature conditions, and establishing a relationship between the converter valve outlet temperature and the heat dissipation fan air volume, namely a fourth relationship;
combining the third relation and the fourth relation to obtain a fifth relation between the environmental data and the operation load and the air quantity of the cooling fan;
step 3, verifying and correcting the third relation and the fifth relation obtained in the step 2 by adopting a converter valve cooling system,
verifying the relation obtained by model calculation by combining with an actually-operated converter valve cooling system, acquiring environmental data around the converter valve and self-operation load in actual operation, adjusting the flow of the circulating pump and the air volume of the cooling fan to calculated values, verifying whether the calculated relation is reliable or not by acquiring the inlet and outlet temperature of the valve, and properly correcting the relation calculated by the model according to the proportional relation between the current inlet and outlet temperature and the optimal inlet and outlet temperature, thereby obtaining the final third relation and fifth relation.
The valve tower model is solved based on the heat transfer model at the time of calculation.
When the physical model is constructed, a valve tower model containing an internal cooling circulation pipeline is constructed based on the turbulence model and the heat transfer model.
When a converter valve model containing an internal cooling circulating pipeline is constructed, the action of a circulating pump is equivalent to a momentum source item and is set in physical modeling.
Step 3, the converter valve cooling system comprises a converter valve and an external cooling heat dissipation system; the external cooling heat dissipation system comprises an external cooling radiator and a heat dissipation fan, wherein the outlet of the converter valve is connected with the inlet of the external cooling radiator, and the inlet of the converter valve is connected with the outlet of the external cooling radiator; a data acquisition system is arranged in the converter valve cooling system, and a data acquisition module acquires environmental data, operating load, circulating pump flow, cooling fan air volume, valve inlet temperature and valve outlet temperature.
A power equipment operation condition adjusting system in a converter valve cooling system comprises a temperature obtaining module, a circulating pump parameter obtaining module, a fan parameter obtaining module, a control module and a storage module;
the temperature acquisition module is used for acquiring environmental data, the temperature of cooling water at an outlet of the converter valve and the temperature of cooling water at an inlet of the converter valve;
the storage module is used for storing the relationship between the environmental data and the operation load and the flow of the circulating pump and the relationship between the environmental data and the operation load and the air quantity of the cooling fan;
the control module acquires environmental data, operation load, current circulating pump flow and cooling fan air volume; the optimal flow of the circulating pump is obtained according to the relationship between the environmental data and the operation load and the flow of the circulating pump, the optimal air volume of the heat dissipation fan is obtained according to the relationship between the environmental data and the operation load and the air volume of the heat dissipation fan, and the current environmental data, the flow of the circulating pump under the operation load and the air volume of the heat dissipation fan are adjusted in real time based on the optimal flow of the circulating pump and the air volume of the heat dissipation fan.
A converter valve cooling system comprises a converter valve, an external cooling heat dissipation system, a circulating pump, a data acquisition system, a controller and a memory; the external cooling heat dissipation system comprises an external cooling radiator and a heat dissipation fan, a cooling water outlet of the converter valve is connected with a cooling water inlet of the external cooling radiator, and the converter valve inlet is connected with a cooling water outlet of the external cooling heat dissipation system; the inlet of the circulating pump is connected with the cooling water outlet of the external cooling radiator, the outlet of the circulating pump is connected with the inlet of the converter valve, and the data acquisition system acquires environmental data, operation load, flow of the circulating pump and air volume of the cooling fan; the output end of the data acquisition system is connected with the input end of the controller, and the output end of the controller is connected with the input ends of control signals of the circulating pump and the cooling fan; the memory is used for storing the corrected third relation and the fifth relation, and the controller adjusts the flow of the circulating pump and the air volume of the cooling fan according to the third relation and the fifth relation based on the environmental data and the operating load acquired by the data acquisition system, and then the optimal rotating speed of the circulating pump and the optimal power of the cooling fan are reached.
A computer device comprises but is not limited to one or more processors and a memory, wherein the memory is used for storing computer executable programs, the processors read part or all of the computer executable programs from the memory and execute the computer executable programs, and the steps of acquiring the relationship between the environment data and the operation load and the flow rate of a circulating pump and the relationship between the environment data and the operation load and the air volume of a heat dissipation fan can be realized when the processors execute the part or all of the computer executable programs.
Compared with the prior art, the invention has at least the following beneficial effects:
the method for adjusting the operating condition of the power equipment in the converter valve cooling system can realize the normal operation of the converter valve under the conditions of variable operating load and complex environment, and dynamically adjusts the power equipment in time according to the real-time monitored environmental data and the operating load in the operation process of the converter valve, so that the extreme operating condition possibly occurring in the operation process of the converter valve can be judged in advance, a proper margin can be ensured to be left, the economic requirement can be met, meanwhile, manual intervention can be avoided, and the accuracy is improved.
The cooling system capable of adjusting the working condition in real time introduced by the converter valve system is beneficial to realizing safe and reliable operation of the converter valve, reduces energy consumption, does not need manual intervention, and is more accurate in automatic adjustment of the cooling system.
Drawings
FIG. 1 is a schematic diagram of an intelligent system for regulating the operating conditions of a power plant in a converter valve cooling system.
FIG. 2 is a general technical route for establishing an intelligent system for adjusting the operation condition of power equipment in a converter valve cooling system.
FIG. 3 is a technical route for constructing a model.
Fig. 4a is a technical route calculated by a converter valve tower model.
Fig. 4b is a technical route calculated by a valve tower model with an internal cooling circulation pipeline.
Fig. 4c is a technical route of the cooling fan air volume model calculation.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
If the dynamic regulation is carried out on the power equipment according to the real-time monitored environmental data and the operation load in the operation process of the converter valve, the extreme working conditions which possibly occur in the operation process of the converter valve can be judged in advance, a proper margin can be ensured to be reserved, and the economic requirement is met.
Firstly, establishing a converter valve cooling system model which comprises a converter valve tower model, a valve tower model containing an internal cooling circulating pipeline and an external cooling system radiator model, setting environmental data and operating load, performing simulation calculation by using the converter valve tower model to obtain thermal load, and establishing a relation between the thermal load and the environmental data and the operating load; setting inlet temperature conditions, taking a heat load as an independent variable, calculating by using a valve tower model containing an internal cooling circulating pipeline, and solving the flow of a circulating pump and the outlet temperature of a converter valve which meet the cooling requirement, thereby establishing the relationship between the heat load and the flow of the circulating pump and the outlet temperature of the converter valve; through the above relationships, relationships between environmental data and operating loads and circulating pump flow and converter valve outlet temperatures can be established.
According to the temperature of the converter valve tower outlet (namely the inlet of the external cooling radiator circulating pipeline) obtained through simulation calculation and the temperature of the converter valve inlet (namely the outlet of the external cooling radiator circulating pipeline), an external cooling system radiator model is used for calculation to obtain the fan air volume meeting the inlet and outlet temperature conditions, therefore, the relationship between the converter valve outlet temperature and the cooling fan air volume is established, and the relationship between the environmental data and the operation load and the cooling fan air volume can be established by combining the relationship obtained through the previous calculation.
The relationship between the environmental data and the operation load obtained by the model and the flow rate of the circulating pump and the air quantity of the cooling fan needs to be verified by experiments and corrected, and the intelligent adjusting system adjusts the operation condition of power equipment in the converter valve cooling system based on the relationship after the experiment correction, so that the efficient and economic operation of the cooling system is ensured.
Referring to fig. 1, monitored environmental data and an operation load are input to a controller, an optimal operation condition of a power plant under a current condition is obtained through internal calculation of the controller, the optimal operation condition is compared with a circulation pump flow and a cooling fan air volume fed back to the controller, an adjustment scheme is executed according to a comparison result, and the circulation pump flow and the cooling fan air volume are adjusted.
Referring to fig. 2, the key technology of the present invention is how to build the system, i.e., the controller internal principle. Firstly, a model of the converter valve cooling system is built, the built model is used for calculation to obtain the relation between environmental data and operation load and the optimal working condition of the power equipment, then the relation obtained by simulation is verified and corrected by using an experiment, and an intelligent system for adjusting the operation working condition of the power equipment in the converter valve cooling system is built on the basis of the result obtained after the experiment is corrected.
Referring to fig. 3, a converter valve cooling system model is constructed: comprises a converter valve tower model, a valve tower model containing an inner cooling circulating pipeline and an outer cooling system radiator model,
for a converter valve tower model, firstly, acquiring a heat load generation rule inside a converter valve when the converter valve works under variable operation load and complex environment conditions to adjust the cooling capacity of a cooling system by adjusting the operation characteristics of power equipment; the model is built for the converter valve, the main structure of the converter valve is a valve tower, and meanwhile, the heat production rules of all the valve towers are consistent, so that one valve tower is taken as an example when the converter valve model is built.
For a converter valve model containing an internal cooling circulating pipeline, the internal cooling circulating system comprises the circulating pipeline and a circulating pump, but the geometric model does not contain the circulating pump, the effect of the circulating pump is equivalent to a momentum source item, the circulating pump is arranged in physical modeling, a converter valve tower model is constructed, the relationship between environmental data and operation load and thermal load can be obtained, and the converter valve model containing the internal cooling circulating pipeline is the basis for adjusting the operation condition of the circulating pump of the internal cooling system.
For the external cooling system radiator model, the external cooling system mainly comprises a heat radiation fan and a radiator, the construction of the geometric model does not comprise the heat radiation fan, and an attached fan model is added in the physical modeling.
Constructing a geometric model: and performing geometric modeling and grid division in the ICEM on the basis of determining a model prototype and simplifying principles.
Constructing a physical model: equations needing to be solved when the physical model is built comprise a turbulence model and heat transfer models (heat conduction, heat convection and heat radiation), wherein the heat transfer models only need to be solved when the single valve tower model is calculated, and a proper pressure-speed coupling equation format, a proper convection interpolation format, a proper gradient interpolation format and a proper pressure interpolation format are set; all models need to add a heat exchange additional model during calculation, and a fan model needs to be added to a converter valve external cooling system radiator model. Setting appropriate boundary conditions, monitoring points, calculation conditions, storage settings, and the like according to the calculation requirements.
Referring to fig. 4a, 4b, 4 c: five relationships can be obtained according to the technical route of model calculation, which are respectively:
the first relationship: and taking the environmental data and the operating load as input parameters, performing simulation calculation in Fluent by using a converter valve tower model, and outputting a thermal load value, thereby establishing a relation between the environmental data, the operating load and the thermal load value.
The second relationship is: the method comprises the steps of carrying out simulation calculation on an established converter valve model containing an internal cooling circulating pipeline by using Fluent, setting a heat load value obtained by the previous simulation calculation as an energy source item of a valve tower, setting an inlet temperature (the inlet temperature is generally 30 ℃), obtaining a circulating pump flow meeting the cooling requirement and a converter valve outlet temperature through the simulation calculation, and accordingly establishing a relation between the heat load and the circulating pump flow and the converter valve outlet temperature.
The third relation is: a third relationship may be derived by combining the first relationship and the second relationship, i.e. establishing a relationship between environmental data and operating load and the circulation pump flow and converter valve outlet temperature.
The fourth relationship: and (3) performing simulation calculation by using the built external cooling system radiator model by using Fluent, setting the inlet and outlet temperature of the valve as the inlet and outlet conditions of the model, and obtaining the air volume of the radiator fan through simulation calculation by internally arranging a fan model. Thereby establishing a relationship between the converter valve outlet temperature and the fan air volume.
The fifth relationship is: and obtaining a fifth relation from the obtained third relation and the fourth relation, namely establishing the relation between the environmental data, the operation load and the air quantity of the heat radiation fan.
The invention relates to a method for adjusting the operation condition of power equipment in a converter valve cooling system, which comprises the following steps:
acquiring environmental data and operation load;
obtaining optimal circulating pump flow and optimal cooling fan air volume according to the relationship between the environmental data and the operating load and the circulating pump flow and the relationship between the environmental data and the operating load and the cooling fan air volume;
acquiring the current circulating pump flow and the air volume of a cooling fan, namely the current power equipment working condition, comparing the current power equipment working condition with the optimal power equipment working condition, and if the comparison result is inconsistent, adjusting the current power equipment working condition to the optimal power equipment working condition;
and the obtained third relation and the fifth relation are verified and corrected through experiments and are used as a basis for adjusting the operation condition of the power equipment of the cooling system. The relationship obtained by simulation can only reflect the basic trend and rule of environmental data and operation load and the flow rate of the circulating pump and the air quantity of the cooling fan, and the final relationship can be determined by adding a correction coefficient on the basis of the original relationship after verification.
The relationship between the environment data and the operation load corrected through experiments and the flow of the circulating pump and the cooling fan is the core of the intelligent adjusting system, the controller is established on the basis of the relationship, the system can monitor the current environment data in real time and record the operation load data, and the flow of the circulating pump and the air quantity of the cooling fan can be obtained through internal calculation. And comparing the current flow of the circulating pump with the air volume of the cooling fan to implement the adjusting scheme.
Based on the method, the invention also provides a power equipment operation condition adjusting system in the converter valve cooling system, which comprises a temperature obtaining module, a circulating pump parameter obtaining module, a fan parameter obtaining module, a control module and a storage module;
the temperature acquisition module is used for acquiring environmental data, the temperature of cooling water at a cooling water outlet of the converter valve and the temperature of cooling water at an inlet of the converter valve;
the storage module is used for storing the relationship between the environmental data and the operation load and the relationship between the flow rate of the circulating pump and the outlet temperature of the converter valve and the relationship between the outlet temperature of the converter valve and the air quantity of the cooling fan;
the control module is based on the acquired environmental data, the cooling water temperature of the converter valve outlet and the cooling water temperature of the converter valve inlet; obtaining the power of a heat radiation fan and the rotating speed of the circulating pump according to the relationship between the environmental data and the operating load and the relationship between the flow rate of the circulating pump and the outlet temperature of the converter valve and the relationship between the outlet temperature of the converter valve and the air quantity of the heat radiation fan; and then combining characteristic curves of the circulating pump and the heat dissipation fan to obtain the optimal circulating pump rotating speed and heat dissipation fan power, and adjusting the circulating pump rotating speed and the heat dissipation fan power under the current environmental data and the operating load in real time based on the optimal circulating pump rotating speed and the heat dissipation fan power.
Optionally, the invention provides a converter valve cooling system, which comprises a converter valve, an external cooling heat dissipation system, a circulating pump, a data acquisition system, a controller and a memory, wherein the external cooling heat dissipation system is connected with the converter valve; the external cooling heat dissipation system comprises an external cooling radiator and a heat dissipation fan, a cooling water outlet of the converter valve is connected with a cooling water inlet of the external cooling radiator, and the converter valve inlet is connected with a cooling water outlet of the external cooling heat dissipation system; the inlet of the circulating pump is connected with the cooling water outlet of the external cooling radiator, the outlet of the circulating pump is connected with the inlet of the converter valve, and the data acquisition system acquires the air quantity of the cooling fan, environmental data, the flow of the circulating pump, the temperature of the cooling water outlet of the converter valve and the temperature of the cooling water inlet of the converter valve; the output end of the data acquisition system is connected with the input end of the controller, and the output end of the controller is connected with the input ends of control signals of the circulating pump and the cooling fan; the memory is used for storing the corrected third relation and the fifth relation, and the controller adjusts the rotating speed of the circulating pump and the power of the cooling fan according to the third relation and the fifth relation based on the environmental data and the operating load acquired by the data acquisition system, and switches the optimal rotating speed of the circulating pump and the optimal power of the cooling fan.
The invention also provides a computer device, which comprises but is not limited to one or more processors and a memory, wherein the memory is used for storing computer executable programs, the processor reads part or all of the computer executable programs from the memory and executes the computer executable programs, and the steps of acquiring the relationship between the environment data and the operation load and the flow rate of the circulating pump and the relationship between the environment data and the operation load and the air volume of the cooling fan can be realized when the processor executes the part or all of the computer executable programs.
The processor may be a Central Processing Unit (CPU), Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or a Programmable Logic Controller (PLC).
Claims (8)
1. The method for adjusting the operation condition of the power equipment of the converter valve cooling system is characterized by comprising the following steps of:
acquiring environmental data and operation load;
obtaining optimal circulating pump flow and optimal cooling fan air volume according to the relationship between the environmental data and the operating load and the circulating pump flow and the relationship between the environmental data and the operating load and the cooling fan air volume; the method specifically comprises the following steps:
taking the environmental data and the operation load as input parameters, performing simulation calculation in Fluent by using a converter valve tower model, and outputting a heat load value, thereby establishing a relationship between the environmental data, the operation load and the heat load value, namely obtaining a first relationship;
based on a valve tower model containing an internal cooling circulating pipeline, performing simulation calculation by using Fluent, setting a heat load value obtained through the simulation calculation as an energy source item of the valve tower, giving an inlet temperature, and obtaining a circulating pump flow and a converter valve outlet temperature meeting the cooling requirement through the simulation calculation, so as to establish a relationship between a heat load and the circulating pump flow and the converter valve outlet temperature, namely obtaining a second relationship;
combining the first relation and the second relation to obtain a third relation, namely establishing a relation between environmental data and operation load and the flow rate of the circulating pump and the temperature of the outlet of the converter valve;
based on an external cooling system radiator model, performing simulation calculation by using Fluent, setting the temperature of an inlet and an outlet of a valve as the inlet and outlet conditions of the model, building a fan model, and obtaining the air volume of a radiator fan through simulation calculation, thereby establishing the relationship between the outlet temperature of a converter valve and the air volume of the fan, namely a fourth relationship;
establishing a relationship between the environmental data and the operation load and the air quantity of the cooling fan by combining the third relationship and the fourth relationship, namely a fifth relationship;
verifying and correcting the third relation and the fifth relation by adopting a converter valve cooling system,
verifying the relation obtained by model calculation by combining with an actually-operated converter valve cooling system, acquiring environmental data and self-operation load around the converter valve in actual operation, adjusting the flow of the circulating pump and the air volume of the cooling fan to a calculated value, verifying whether the calculated relation is reliable or not by acquiring the inlet and outlet temperature of the valve, correcting the relation of the model calculation according to the proportional relation between the current inlet and outlet temperature and the optimal inlet and outlet temperature to obtain a final third relation and a final fifth relation, and obtaining the optimal flow of the circulating pump and the air volume of the cooling fan of the power equipment according to the final third relation and the final fifth relation;
acquiring current circulating pump flow and cooling fan air volume, namely current power equipment working condition, comparing the current power equipment working condition with the optimal circulating pump flow and cooling fan air volume of the power equipment, and if the comparison result is inconsistent, adjusting the current power equipment working condition to the optimal power equipment working condition;
the converter valve tower model, the valve tower model containing the inner cooling circulating pipeline and the outer cooling system radiator model are constructed as follows: when a converter valve tower model, a valve tower model containing an inner cooling circulating pipeline and an outer cooling system radiator model are built, geometric models of the converter valve tower model, the valve tower model containing the inner cooling circulating pipeline and the outer cooling system radiator model are respectively built, then a physical model is built based on the geometric models, and when the geometric models are built, geometric modeling is completed and meshes are divided on the basis of determining model prototypes and simplifying principles; when a physical model is built, a converter valve tower model, a valve tower model containing an internal cooling circulating pipeline and an external cooling system radiator model are added with a heat exchange additional model during building; when constructing the external cooling system radiator model, a cooling fan model is added in the physical modeling.
2. The method for adjusting the operating condition of the power equipment of the converter valve cooling system according to claim 1, wherein the converter valve tower model is solved based on a heat transfer model during calculation.
3. The method for adjusting the operating condition of the power equipment of the converter valve cooling system according to claim 1, wherein a turbulence model and a heat transfer model are solved when a physical model is constructed, and only the heat transfer model is solved when an individual valve tower model is calculated.
4. The method for adjusting the operating condition of the power equipment of the converter valve cooling system according to claim 1, wherein when a valve tower model containing an internal cooling circulation pipeline is constructed, the action of a circulation pump is equivalent to a momentum source term and is set in physical modeling.
5. The method for adjusting the operating condition of the power equipment of the converter valve cooling system according to claim 1, wherein the converter valve cooling system comprises a converter valve and an external cooling heat dissipation system; the external cooling heat dissipation system comprises an external cooling radiator and a heat dissipation fan, wherein the outlet of the converter valve is connected with the inlet of the external cooling radiator, and the inlet of the converter valve is connected with the outlet of the external cooling radiator; and a data acquisition system is arranged in the converter valve cooling system and used for acquiring environmental data, operation load, circulation pump flow, cooling fan air volume, valve inlet temperature and valve outlet temperature.
6. A power equipment operation condition adjusting system of a converter valve cooling system is characterized by comprising a temperature acquisition module, a circulating pump parameter acquisition module, a fan parameter acquisition module, a control module, a storage module and a model building module;
the temperature acquisition module is used for acquiring environmental data, the temperature of cooling water at an outlet of the converter valve and the temperature of cooling water at an inlet of the converter valve;
the storage module is used for storing the relationship between the environmental data and the operation load and the flow of the circulating pump and the relationship between the environmental data and the operation load and the air quantity of the cooling fan;
the control module reads environmental data, operation load, current circulating pump flow and cooling fan air volume, obtains the optimal flow of the circulating pump according to the relationship between the environmental data and the operation load and the circulating pump flow, obtains the optimal air volume of the cooling fan according to the relationship between the environmental data and the operation load and the cooling fan air volume, and adjusts the circulating pump flow and the cooling fan air volume under the current environmental data and the operation load in real time based on the optimal circulating pump flow and the cooling fan air volume; taking the environmental data and the operation load as input parameters, performing simulation calculation in Fluent by using a converter valve tower model, and outputting a heat load value, thereby establishing a relationship between the environmental data, the operation load and the heat load value, namely obtaining a first relationship;
based on a valve tower model containing an internal cooling circulating pipeline, performing simulation calculation by using Fluent, setting a heat load value obtained through the simulation calculation as an energy source item of the valve tower, giving an inlet temperature, and obtaining a circulating pump flow and a converter valve outlet temperature meeting the cooling requirement through the simulation calculation, so as to establish a relationship between a heat load and the circulating pump flow and the converter valve outlet temperature, namely obtaining a second relationship;
combining the first relation and the second relation to obtain a third relation, namely establishing a relation between environmental data and operation load and the flow rate of the circulating pump and the temperature of the outlet of the converter valve;
based on an external cooling system radiator model, performing simulation calculation by using Fluent, setting the temperature of an inlet and an outlet of a valve as the inlet and outlet conditions of the model, building a fan model, and obtaining the air volume of a radiator fan through simulation calculation, thereby establishing the relationship between the outlet temperature of a converter valve and the air volume of the fan, namely a fourth relationship;
establishing a relationship between the environmental data and the operation load and the air quantity of the cooling fan by combining the third relationship and the fourth relationship, namely a fifth relationship; verifying and correcting the third relation and the fifth relation by adopting a converter valve cooling system,
verifying the relation obtained by model calculation by combining with an actually-operated converter valve cooling system, acquiring environmental data and self-operation load around the converter valve in actual operation, adjusting the flow of the circulating pump and the air volume of the cooling fan to a calculated value, verifying whether the calculated relation is reliable or not by acquiring the inlet and outlet temperature of the valve, correcting the relation of the model calculation according to the proportional relation between the current inlet and outlet temperature and the optimal inlet and outlet temperature to obtain a final third relation and a final fifth relation, and obtaining the optimal flow of the circulating pump and the air volume of the cooling fan of the power equipment according to the final third relation and the final fifth relation;
acquiring current circulating pump flow and cooling fan air volume, namely current power equipment working condition, comparing the current power equipment working condition with the optimal circulating pump flow and cooling fan air volume of the power equipment, and if the comparison result is inconsistent, adjusting the current power equipment working condition to the optimal power equipment working condition;
the model building module is used for building a converter valve tower model, a valve tower model containing an internal cooling circulating pipeline and an external cooling system radiator model, when the converter valve tower model, the valve tower model containing the internal cooling circulating pipeline and the external cooling system radiator model are built, the geometric models are respectively built, then a physical model is built based on the geometric models, and when the geometric models are built, geometric modeling is completed and meshes are divided on the basis of determining model prototypes and simplifying principles; when a physical model is built, a converter valve tower model, a valve tower model containing an internal cooling circulating pipeline and an external cooling system radiator model are added with a heat exchange additional model during building; when constructing the external cooling system radiator model, a cooling fan model is added in the physical modeling.
7. A converter valve cooling system is characterized by comprising a converter valve, an external cooling heat dissipation system, a circulating pump, a data acquisition system, a controller and a memory; the external cooling heat dissipation system comprises an external cooling radiator and a heat dissipation fan, a cooling water outlet of the converter valve is connected with a cooling water inlet of the external cooling radiator, and the converter valve inlet is connected with a cooling water outlet of the external cooling heat dissipation system; the inlet of the circulating pump is connected with the cooling water outlet of the external cooling radiator, the outlet of the circulating pump is connected with the inlet of the converter valve, and the data acquisition system acquires environmental data, operation load, flow of the circulating pump and air volume of the cooling fan; the output end of the data acquisition system is connected with the input end of the controller, and the output end of the controller is connected with the input ends of control signals of the circulating pump and the cooling fan; the memory is used for storing the corrected third relation and the corrected fifth relation of claim 1 or 2, and the controller adjusts the flow rate of the circulating pump and the air volume of the cooling fan according to the third relation and the fifth relation based on the environmental data and the operating load acquired by the data acquisition system to obtain the optimal rotating speed of the circulating pump and the optimal power of the cooling fan.
8. A computer device, comprising but not limited to one or more processors and a memory, wherein the memory is used for storing computer executable programs, the processor reads part or all of the computer executable programs from the memory and executes the computer executable programs, and the processor can realize the steps of acquiring the relationship between the environment data and the operation load and the flow rate of the circulating pump and the relationship between the environment data and the operation load and the air volume of the cooling fan in any one of claims 1 to 5 when executing the computer executable programs.
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| JPH05136587A (en) * | 1991-11-12 | 1993-06-01 | Hitachi Ltd | Water cooler |
| CN106253635A (en) * | 2016-08-17 | 2016-12-21 | 常州博瑞电力自动化设备有限公司 | The double water distribution cooling system of a kind of direct-current transmission converter valve |
| CN104239724B (en) * | 2014-09-19 | 2017-04-12 | 国家电网公司 | Online monitoring and assessment method for heat exchange efficiency of water-cooling system of converter valve |
| CN107960043A (en) * | 2017-10-30 | 2018-04-24 | 全球能源互联网研究院 | A kind of converter valve and its water-cooling system |
| CN208257647U (en) * | 2018-03-27 | 2018-12-18 | 特变电工新疆新能源股份有限公司 | A kind of converter valve cooling system |
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2020
- 2020-09-28 CN CN202011043530.6A patent/CN112105240B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05136587A (en) * | 1991-11-12 | 1993-06-01 | Hitachi Ltd | Water cooler |
| CN104239724B (en) * | 2014-09-19 | 2017-04-12 | 国家电网公司 | Online monitoring and assessment method for heat exchange efficiency of water-cooling system of converter valve |
| CN106253635A (en) * | 2016-08-17 | 2016-12-21 | 常州博瑞电力自动化设备有限公司 | The double water distribution cooling system of a kind of direct-current transmission converter valve |
| CN107960043A (en) * | 2017-10-30 | 2018-04-24 | 全球能源互联网研究院 | A kind of converter valve and its water-cooling system |
| CN208257647U (en) * | 2018-03-27 | 2018-12-18 | 特变电工新疆新能源股份有限公司 | A kind of converter valve cooling system |
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