CN109412050B - Adjusting method of distribution room environment adjusting system based on sensor optimal arrangement - Google Patents

Adjusting method of distribution room environment adjusting system based on sensor optimal arrangement Download PDF

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CN109412050B
CN109412050B CN201811350415.6A CN201811350415A CN109412050B CN 109412050 B CN109412050 B CN 109412050B CN 201811350415 A CN201811350415 A CN 201811350415A CN 109412050 B CN109412050 B CN 109412050B
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temperature
distribution room
indoor
humidity
parameters
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CN109412050A (en
Inventor
范强
邱继艳
戴宇
吕黔苏
徐长宝
李博文
姜海波
曾晓路
张历
顾威
古庭赟
林呈辉
桂军国
高吉普
罗显跃
陈沛龙
文贤馗
刘士勇
赵鹏程
扈克德
邵梦桥
辛明勇
肖小兵
郭玮
曹雷
徐梅梅
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Guizhou Power Grid Co Ltd
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Guizhou Power Grid Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/56—Cooling; Ventilation
    • H02B1/565—Cooling; Ventilation for cabinets
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
    • G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof

Abstract

The invention discloses a method for adjusting an environmental regulation system of a distribution room based on sensor optimal arrangement, which comprises a method for adjusting the sensor optimal arrangement and the regulation system, wherein the method for adjusting the sensor optimal arrangement comprises the following steps: establishing a three-dimensional geometric simulation model of a distribution room of a transformer substation by using Ansys, carrying out simulation analysis on a temperature field and a humidity field of the distribution room by using the Ansys, obtaining temperature field and humidity field distribution simulation diagrams at different heights, and selecting temperature and humidity sensors for point distribution through the simulation diagrams; the problem that accidents are caused by less and unreasonable distribution of monitoring points of indoor temperature and humidity is solved; 2. in the control strategy, once the environment is monitored to have an area which is not up to the requirement, all the equipment is started to regulate the whole environment together. Firstly, the accuracy is not enough, secondly, unnecessary equipment is started, the working time of the equipment is increased, the energy consumption is increased, and the aims of energy conservation and emission reduction cannot be achieved.

Description

Adjusting method of distribution room environment adjusting system based on sensor optimal arrangement
Technical Field
The invention belongs to the field of automatic control, and particularly relates to a method for adjusting an environmental adjustment system of a distribution room based on sensor optimal arrangement.
Background
The high voltage distribution room is equipped with many important power devices and systems thereof, which have severe environmental requirements. The over-high temperature may cause the device to generate too much heat and cannot dissipate heat, so as to cause damage, and the system may also have unstable operation due to high temperature. The phenomena of condensation, corrosion and the like can occur due to the overhigh humidity and a large amount of dust in the air, so that accidents such as equipment aging, faults and the like can occur. In order to reduce the air temperature and humidity of the operation environment of the power equipment of the distribution room, meet the environmental temperature and humidity index of the safe operation of the high-voltage equipment, prevent dust accumulation and condensation, solve the problems of rusting and aging of the equipment in the high-voltage distribution room, prolong the life cycle of the equipment, ensure the production safety, reduce the energy consumption and save energy and reduce emission, a reasonable environment control system is needed to be designed; in the existing environmental control strategy in a distribution room, when the indoor temperature and humidity are monitored, when the temperature and humidity do not meet the requirements, all equipment (a dehumidifier or a fan) is started to control, and the indoor temperature and humidity are regulated, so that the temperature and humidity are reduced to the required range; the current environmental control strategy and method mainly have the following defects:
1. the monitoring points for indoor temperature and humidity are distributed less and unreasonably, and although the environment near the monitoring points is controlled by the system, the temperature and humidity of other spaces can not meet the requirements when the monitoring points meet the requirements. The situation that the environment does not reach the standard still possibly occurs in the unmonitored place, so that accidents occur;
2. in the control strategy, once the environment is monitored to have an area which is not up to the requirement, all the equipment is started to regulate the whole environment together. Once it is not accurate enough, in order to make a certain part reach the standard so that the ambient temperature already at low temperature becomes lower, the targeted control of the space in the power distribution room cannot be realized; and secondly, unnecessary equipment is started, the working time of the equipment is increased, the energy consumption is increased, and the aims of energy conservation and emission reduction cannot be fulfilled.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the adjusting method of the distribution room environment adjusting system based on the sensor optimization arrangement is provided to solve the problems in the prior art: 1. the monitoring points for indoor temperature and humidity are distributed less and unreasonably, and although the environment near the monitoring points is controlled by the system, the temperature and humidity of other spaces can not meet the requirements when the monitoring points meet the requirements. The situation that the environment does not reach the standard still possibly occurs in the unmonitored place, so that accidents occur; 2. in the control strategy, once the environment is monitored to have an area which is not up to the requirement, all the equipment is started to regulate the whole environment together. Once it is not accurate enough, in order to make a certain part reach the standard so that the ambient temperature already at low temperature becomes lower, the targeted control of the space in the power distribution room cannot be realized; and secondly, unnecessary equipment is started, the working time of the equipment is increased, the energy consumption is increased, and the aims of energy conservation and emission reduction cannot be fulfilled.
The technical scheme of the invention is as follows:
a method for adjusting an environmental conditioning system of a distribution room based on sensor optimization arrangement comprises the sensor optimization arrangement and a conditioning system adjusting method, wherein the sensor optimization arrangement method comprises the following steps: the method comprises the steps of establishing a three-dimensional geometric simulation model of a distribution room of the transformer substation by using Ansys, carrying out simulation analysis on a temperature field and a humidity field of the distribution room by using the Ansys, obtaining temperature field and humidity field distribution simulation graphs at different heights, and selecting temperature and humidity sensors for point distribution through the simulation graphs.
The method for establishing the three-dimensional geometric simulation model of the transformer substation distribution room by using Ansys comprises the following steps of:
step A, collecting parameters needed by modeling of a distribution room of the transformer substation, including model parameters of the distribution room of the transformer substation and the number n of ground foot windows for ventilationdAnd parameters, the number of the ventilation fans nfThe method comprises the following steps of obtaining parameters, the number of switch cabinets of a distribution room, the position of the distribution room and the parameters, wherein the model parameters of the distribution room comprise the length L, the width W and the height H, the parameters of a ground foot window for air exchange comprise the position of a wall body plane of the ground foot window for air exchange and the resistance coefficient of the ground foot window for air exchange, the parameters of an air exchange fan comprise the position of a wall body plane of the air exchange fan and the flow of the air exchange fan, the temperature parameter Tout of the distribution room outside the distribution room of a transformerA station power distribution room inner wall temperature parameter Twall, an indoor environment temperature parameter Tin and an indoor relative humidity parameter Din; the method comprises the following steps that (1) the maximum value Tmax of the environmental temperature and the maximum value Dmax of the relative humidity of the operating environment in a distribution room of the transformer substation are required; the parameters of the switch cabinet in the distribution room comprise the heating power P of a single switch cabinetkSwitch cabinet porosity ξ;
b, establishing a three-dimensional geometric simulation model of the distribution room of the transformer substation in Ansys by using the parameters required for modeling of the distribution room of the transformer substation, which are acquired in the step 1;
step C, simplifying the model; neglecting the influence of auxiliary equipment in the high-voltage distribution room on fluid flow, setting a heat source of a switch cabinet of the distribution room as a surface heat source, and setting the enclosure structure of the high-voltage distribution room as uniform and consistent heat transfer performance; thereby obtaining a simplified three-dimensional geometric simulation model of the substation distribution room.
The method for carrying out simulation analysis on the temperature field and the humidity field of the power distribution room by using the Ansys to obtain the temperature field and humidity field distribution simulation diagrams at different heights comprises the following steps:
d, determining a calculation domain of a flow field of the power distribution chamber on the premise of maximally representing the flow characteristics of fluid in the power distribution chamber, dispersing the simulation model in the calculation domain by adopting a hexahedral structural grid, automatically dividing the local positions of the power distribution chamber including a switch cabinet, a fan and a vent, and carrying out local encryption processing on the calculation domain to obtain the number of grid units and the number of nodes after grid refinement;
step E, setting boundary conditions and initial conditions of the simulation model by using the power distribution room, the foot margin window for ventilation, the ventilation fan, the power distribution room switch cabinet and the indoor and outdoor environmental parameters of the power distribution room in the step 1;
step F, setting a solving strategy, setting a calculation model as an RNG k-turbulence model, setting a solving method as a simple algorithm, setting the solving precision as a second-order attack style, and setting iteration times N and a termination condition; the simulation termination condition is that the energy residual is less than 10‐7Or inlet and outlet flow error less than 10‐4；
And G, starting simulation until a simulation termination condition is reached, and acquiring temperature field and humidity field distribution simulation graphs at different heights.
The method for selecting the temperature and humidity sensors for point distribution through the simulation diagram comprises the following steps: selecting the temperature field and humidity field distribution simulation graphs with different heights respectively
Figure BDA0001864720930000041
Selecting 4 points with the highest temperature and 4 points with the lowest temperature as the mounting points of the temperature sensors at the H position to acquire representative temperature data of temperature sensitive areas with different heights, wherein the representative temperature data are respectively arranged at the positions
Figure BDA0001864720930000042
Figure BDA0001864720930000043
And 4 points with the highest relative humidity and 4 points with the lowest relative humidity are selected at the H position to serve as installation points of the humidity sensor, so that the representative relative humidity data of the relative humidity sensitive areas with different heights can be obtained.
The adjusting method of the adjusting system comprises the following steps:
step 1, when a smoke monitoring element monitors that dense smoke exists, a temperature and humidity automatic control system of a substation distribution room sends out an alarm signal, and meanwhile, an exhaust fan is automatically started to operate at the maximum wind speed to discharge toxic and harmful gas in a switch room; when the smoke monitoring element does not monitor dense smoke, stopping exhausting, and switching to normal temperature and humidity monitoring;
step 2, when T is reachedIndoor use≥40℃，
Figure BDA0001864720930000051
TOutdoorsNo action when the temperature is more than or equal to 40 ℃; when T isIndoor use≥40℃，
Figure BDA0001864720930000052
TOutdoors≤TIndoor useWhen the temperature is lowered, after the temperature is maintained for 3-5 minutes, an exhaust fan of the high-voltage distribution room is started to perform indoor temperature reduction treatment;
step 3, when T is reachedIndoor use≥40℃、
Figure BDA0001864720930000053
And is
Figure BDA0001864720930000054
TOutdoors≤TIndoor useWhen the air is exhausted, the exhaust fan is started; when T isIndoor use≥40℃、
Figure BDA0001864720930000055
When is not in use, and
Figure BDA0001864720930000056
Toutdoors≤TIndoor useIf yes, starting an exhaust fan and a dehumidifier; when T isIndoor use≥40℃、
Figure BDA0001864720930000057
When is not in use, and
Figure BDA0001864720930000058
Toutdoors≥TIndoor useIf yes, starting a dehumidifier for dehumidification;
step 4, when T is reachedIndoor use＜40℃、
Figure BDA0001864720930000059
When is not in use, and
Figure BDA00018647209300000510
the exhaust fan is started; when T isIndoor use＜40℃、
Figure BDA00018647209300000511
And is
Figure BDA00018647209300000512
Starting a dehumidifier for dehumidification without starting an exhaust fan;
step 5, when T is reachedIndoor useAt < 40 ℃, e.g. the moisture content outside the chamber is less than the moisture content in the chamber, i.e. dOutdoor moisture content＜dMoisture content in the chamberStarting the exhaust fan until the indoor and outdoor moisture contents are equal, and closing the exhaust fan;
step 6, when T is reachedSurface temperature of building envelope＞TDew point temperatureIf the T is less than the threshold, the start-stop action of the exhaust fan is not interfered, and if the T is less than the thresholdSurface temperature of building envelope＜TDew point temperatureAnd after the time lasts for 3-5 minutes, the exhaust fan is forcibly closed.
The method for calculating the outdoor moisture content and the indoor moisture content comprises the following steps:
step A, the indoor temperature T of the distribution roomIndoor useA and indoor relative humidity
Figure BDA00018647209300000513
For a control target, A is a temperature threshold value, and B is a humidity threshold value; real-time monitoring indoor air dry bulb temperature TIndoor dry ballRelative humidity of indoor air
Figure BDA00018647209300000514
Outdoor air dry bulb temperature TOutdoor dry ballRelative humidity of outdoor air
Figure BDA0001864720930000061
Step B, calculating the saturated partial pressure of the wet air at the corresponding dry-bulb temperature,
Ppartial pressure of saturation＝(5.96485+0.43432TTemperature of dry bulb+0.01804TTemperature of dry bulb 2+5.41671×10-5TTemperature of dry bulb 3+6.9644×10-6TTemperature of dry bulb 4)×102；
Step C, according to the formula of the moisture content of the air
Figure BDA0001864720930000062
Under the condition of measuring the dry bulb temperature and the wet bulb temperature of the air in real time, the indoor and outdoor moisture contents can be obtained;
step D, simultaneously according to the moisture content DMoisture contentDeducing the corresponding dew point temperature, i.e.
TSurface temperature of building envelope＞TDew point temperature。
The invention has the beneficial effects that:
according to the simulation result, a sensitive temperature and humidity measuring point is obtained, and a temperature and humidity detecting point is arranged at the sensitive measuring point; the smoke sensation monitoring point and the environment control system are formed; the environment temperature and humidity are effectively monitored, a plurality of fans and dehumidifiers are arranged in the power distribution room and are controlled, and the proposed judgment logic is very easy to realize in the aspect of control. By means of item control of multiple devices and starting the nearest device according to a monitoring point with high temperature and humidity, an independent and combined control mode of the devices can be achieved, accuracy of environment control is improved, unnecessary working time of the devices is reduced, and energy conservation and emission reduction are achieved;
according to the invention, a plurality of sets of fans and dehumidifiers are configured in the power distribution room, the fans and the dehumidifiers can be controlled in different items by combining action judgment logic according to data of monitoring points, and the nearest fan or dehumidifier is started to adjust according to standard exceeding environmental parameters given by the monitoring points, so that different control modes of independently starting and starting the fans and the dehumidifiers are provided, and the accurate regulation and control of most of spaces in the power distribution room can be realized.
The problem of prior art to less and unreasonable the monitoring point distribution of indoor humiture, though received the control of system to the environment near the monitoring point, but be difficult to guarantee when this monitoring point reaches the requirement, whether the humiture in all the other spaces also reaches the requirement is solved. The situation that the environment does not reach the standard still possibly occurs in the unmonitored place, so that accidents occur; 2. in the control strategy, once the environment is monitored to have an area which is not up to the requirement, all the equipment is started to regulate the whole environment together. Once it is not accurate enough, in order to make a certain part reach the standard so that the ambient temperature already at low temperature becomes lower, the targeted control of the space in the power distribution room cannot be realized; and secondly, unnecessary equipment is started, the working time of the equipment is increased, the energy consumption is increased, and the aims of energy conservation and emission reduction cannot be fulfilled.
Detailed Description
The invention aims to design a reasonable environment control system, control the temperature and the relative humidity of the indoor environment and prolong the life cycle of equipment. And obtaining the temperature and relative humidity distribution condition of the power distribution room through simulation, and determining a sensitive measurement point. On the basis, the environment control system measures the indoor temperature, the outdoor temperature, the indoor smoke sensation, the indoor humidity and the outdoor humidity, and judges whether the dehumidifier and the exhaust fan act or not through a proper control strategy to adjust the environmental parameters of the distribution room to reach a set state. And each fan and dehumidifier are controlled in a subentry manner, and the nearest fan and dehumidifier are started to adjust according to monitoring points with high temperature and humidity.
When the smoke probe monitors the situation of thick smoke, the system immediately sends out an alarm signal, and simultaneously, the exhaust fan is automatically started to operate at the maximum wind speed, and toxic and harmful gas in the switch room is exhausted within the specified time. When the smoke probe returns to normal, the exhaust is stopped, and the normal temperature and humidity monitoring of the switch room is carried out.
Real-time monitoring indoor and outdoor temperature and humidity
Determining the relation between the temperature and the relative humidity of each state point of the space and the sensitive measuring point according to the sensitive measuring point determined by the numerical simulation result on the basis of the numerical simulation calculation result, and correcting the value by adopting the temperature and the relative humidity: t isIndoor temperature＝TSensitive measuring point+ΔTCorrection，
Figure BDA0001864720930000081
The size of the corrected value is determined according to the temperature measuring point and the humidity measuring point. With high-voltage distribution room indoor temperature TIndoor useA and indoor relative humidity
Figure BDA0001864720930000082
For controlling the target, the temperature T of the indoor air dry bulb is monitored in real timeIndoor dry ballRelative humidity of indoor air
Figure BDA0001864720930000083
Outdoor air dry bulb temperature TOutdoor dry ballRelative humidity of outdoor air
Figure BDA0001864720930000084
And the control system calculates the wet air saturation under the corresponding dry bulb temperature in real timeAnd the partial pressure, i.e.,
Ppartial pressure of saturation＝(5.96485+0.43432TTemperature of dry bulb+0.01804TTemperature of dry bulb 2+5.41671×10-5TTemperature of dry bulb 3+6.9644×10-6TTemperature of dry bulb 4)×102
According to the moisture content of air:
Figure BDA0001864720930000085
under the condition of measuring the dry bulb temperature and the wet bulb temperature of the air in real time, the indoor and outdoor moisture contents can be indirectly obtained. At the same time, according to the moisture content dMoisture contentThe corresponding dew point temperature T can be calculatedDew pointThe surface temperature of the indoor enclosure structure is required to be higher than the dew point temperature, namely TSurface temperature of building envelope＞TDew point temperatureSo that it is ensured that no condensation water is generated on the wall surface.
Control strategy
1) General requirements for environmental control of high voltage distribution rooms: the indoor temperature and humidity control is realized by reasonably controlling the ventilation volume, the temperature T and the relative humidity RH of the working area of the high-voltage distribution room are ensured not to exceed the set threshold A, B, and meanwhile, the air moisture content of the high-voltage distribution room is required to be less than the outdoor air moisture content, namely dIndoor use≤dOutdoorsIn order to avoid the condensation of the wall surface of the electric control cabinet, the temperature of a sensitive area of the electric control cabinet needs to be detected, and meanwhile, the temperature of the wall surface is ensured to be higher than the dew point temperature of the air of the wall surface, namely TWall surface≥TAir dew point temperature. The values are stated as A-40 ℃ and B-85%.
2) If only the high-voltage distribution room is used for replacing and ventilating, the indoor air dehumidifying process cannot be realized. Considering factors such as heat dissipation of an indoor cabinet and heat transfer of an outer wall, the indoor temperature and air state change process is generally an equal humidity heating process, that is, the indoor air relative humidity is generally lower than the outdoor relative humidity, but the indoor and outdoor moisture contents are inevitably equal after a period of ventilation, and the indoor and outdoor relative humidity tends to be equal under the condition that the indoor heat dissipation capacity is not large. In view of this, in general, no condensation is present on the surface of the enclosure within the high voltage distribution room. Considering that the temperature difference between day and night is large, under the condition of ventilation and air exchange, condensation water is possibly generated when outdoor warm and humid air contacts indoor low-temperature wall surfaces, so that indoor and outdoor temperature and humidity and the wall surface temperature of an indoor maintenance structure need to be monitored in real time, and the indoor temperature and humidity are reasonably controlled by intermittently controlling the ventilation time. Table 1 is a summary table of the operation judgment information of the normal control, and according to this table, the nearest exhaust fan and dehumidifier are started to operate when they should operate.
TABLE 1 summary of action judgment information for normal control
Figure BDA0001864720930000091
3) When T isIndoor use≥40℃，
Figure BDA0001864720930000092
TOutdoorsNo action when the temperature is more than or equal to 40 ℃; when T isIndoor use≥40℃，
Figure BDA0001864720930000093
TOutdoors≤TIndoor useIn order to avoid frequent actions of the fan, the condition is required to be used as a control condition after lasting for 3-5 minutes, and at the moment, the exhaust fan of the high-voltage distribution room is started to carry out indoor cooling treatment. The temperature control threshold value of the exhaust fan can be reasonably designed and closed according to the field control requirement, for example, the indoor temperature is 35 ℃ or the indoor and outdoor temperatures are equal to be set as the control threshold value, meanwhile, the indoor and outdoor relative humidity is compared, in the ventilation and cooling process, if the relative humidity is higher than 85%, ventilation is stopped, and if the indoor relative humidity is continuously maintained to be more than 85%, an auxiliary dehumidifier is required to be started for dehumidification.
4) If T isIndoor use＜40℃、
Figure BDA0001864720930000101
When is not in use, and
Figure BDA0001864720930000102
then canTo turn on the exhaust fan; if T isIndoor use＜40℃、
Figure BDA0001864720930000103
And is
Figure BDA0001864720930000104
The exhaust fan is not started, and an auxiliary dehumidifier is required to be involved for dehumidification.
5) If T isIndoor use≥40℃、
Figure BDA0001864720930000105
When is not in use, and
Figure BDA0001864720930000106
Toutdoors≤TIndoor useThen the exhaust fan can be started; if T isIndoor use≥40℃、
Figure BDA0001864720930000107
When is not in use, and
Figure BDA0001864720930000108
Toutdoors≤TIndoor useThen the exhaust fan and the dehumidifier can be started; if T isIndoor use≥40℃、
Figure BDA0001864720930000109
When is not in use, and
Figure BDA00018647209300001010
Toutdoors≥TIndoor useThen the dehumidifier can be turned on for dehumidification.
6) When T isIndoor useAt < 40 ℃, e.g. the moisture content outside the chamber is less than the moisture content in the chamber, i.e. dOutdoor moisture content＜dMoisture content in the chamberStarting the exhaust fan until the indoor and outdoor moisture contents are equal, wherein the difference value is approximately equal to less than 0.5%; the exhaust fan is turned off. In order to avoid frequent actions of the fan, the condition lasts for 3-5 minutes.
7) Monitoring the temperature of the surface of the maintenance structure at the sensitive point if TEnvelope watchSurface temperature＞TDew point temperatureIf the T is less than the threshold, the start-stop action of the exhaust fan is not interfered, and if the T is less than the thresholdSurface temperature of building envelope＜TDew point temperatureThe exhaust fan needs to be forcibly turned off, and meanwhile, an auxiliary dehumidifier is considered to be involved for dehumidification. In order to avoid frequent actions of the fan, the condition lasts for 3-5 minutes.
Implementation process
The environmental control strategy of the power distribution room comprises the following steps:
1) and optimally arranging the sensors according to the distribution conditions of the temperature field and the relative humidity field of the high-voltage distribution room, and determining the arrangement position of the measuring point.
The optimal sensor arrangement method comprises the following steps: the method comprises the steps of establishing a three-dimensional geometric simulation model of a distribution room of the transformer substation by using Ansys, carrying out simulation analysis on a temperature field and a humidity field of the distribution room by using the Ansys, obtaining temperature field and humidity field distribution simulation graphs at different heights, and selecting temperature and humidity sensors for point distribution through the simulation graphs.
The method for establishing the three-dimensional geometric simulation model of the transformer substation distribution room by using Ansys comprises the following steps of:
step A, collecting parameters needed by modeling of a distribution room of the transformer substation, including model parameters of the distribution room of the transformer substation and the number n of ground foot windows for ventilationdAnd parameters, the number of the ventilation fans nfThe method comprises the steps of obtaining parameters, including the number of switch cabinets of a power distribution room, the position of the power distribution room and the parameters, wherein model parameters of the power distribution room comprise the length L, the width W and the height H, parameters of a ground window for ventilation comprise the wall plane position of the ground window for ventilation and the resistance coefficient of the ground window for ventilation, parameters of a ventilator comprise the wall plane position of the ventilator and the flow of the ventilator, parameters Tout of the outdoor environment temperature of a transformer substation, parameters Dout of the outdoor relative humidity, parameters Twail of the wall inside the power distribution room of the transformer substation, parameters Tin of the indoor environment temperature and parameters Din of the indoor relative humidity, maximum values Tmax and Dmax of the environment temperature required by the operation environment inside the power distribution room of the transformer substation, and parameters of the switch cabinetkSwitch cabinet porosity ξ;
b, establishing a three-dimensional geometric simulation model of the distribution room of the transformer substation in Ansys by using the parameters required for modeling of the distribution room of the transformer substation, which are acquired in the step 1;
step C, simplifying the model; neglecting the influence of auxiliary equipment in the high-voltage distribution room on fluid flow, setting a heat source of a switch cabinet of the distribution room as a surface heat source, and setting the enclosure structure of the high-voltage distribution room as uniform and consistent heat transfer performance; thereby obtaining a simplified three-dimensional geometric simulation model of the substation distribution room.
The method for carrying out simulation analysis on the temperature field and the humidity field of the power distribution room by using the Ansys to obtain the temperature field and humidity field distribution simulation diagrams at different heights comprises the following steps:
d, determining a calculation domain of a flow field of the power distribution chamber on the premise of maximally representing the flow characteristics of fluid in the power distribution chamber, dispersing the simulation model in the calculation domain by adopting a hexahedral structural grid, automatically dividing the local positions of the power distribution chamber including a switch cabinet, a fan and a vent, and carrying out local encryption processing on the calculation domain to obtain the number of grid units and the number of nodes after grid refinement;
step E, setting boundary conditions and initial conditions of the simulation model by using the power distribution room, the foot margin window for ventilation, the ventilation fan, the power distribution room switch cabinet and the indoor and outdoor environmental parameters of the power distribution room in the step 1;
step F, setting a solving strategy, setting a calculation model as an RNG k-turbulence model, setting a solving method as a simple algorithm, setting the solving precision as a second-order attack style, and setting iteration times N and a termination condition; the simulation termination condition is that the energy residual is less than 10‐7Or inlet and outlet flow error less than 10‐4；
And G, starting simulation until a simulation termination condition is reached, and acquiring temperature field and humidity field distribution simulation graphs at different heights.
The method for selecting the temperature and humidity sensors for point distribution through the simulation diagram comprises the following steps: selecting the temperature field and humidity field distribution simulation graphs with different heights respectively
Figure BDA0001864720930000121
Selecting 4 points with the highest temperature and 4 points with the lowest temperature at the H position as the mounting points of the temperature sensorThe representative temperature data of the temperature sensitive areas with different heights are obtained respectively
Figure BDA0001864720930000122
Figure BDA0001864720930000123
And 4 points with the highest relative humidity and 4 points with the lowest relative humidity are selected at the H position to serve as installation points of the humidity sensor, so that the representative relative humidity data of the relative humidity sensitive areas with different heights can be obtained.
2) The indoor smoke detection monitoring point is positioned at the geometric central position of the indoor ceiling.
3) The temperature and humidity of the indoor and outdoor are monitored in real time by utilizing the temperature and humidity sensors and are transmitted to the automatic adjusting system.
4) According to the temperature and humidity threshold value set by the system, through automatic logic judgment of the system, corresponding measures for controlling the starting and stopping of the exhaust fan and the dehumidifier are taken, and the temperature and humidity in the power distribution room are ensured to be in a proper state.
The invention has the advantages that:
real-time monitoring indoor and outdoor temperature and humidity
Environmental control is achieved on the premise that the environmental parameters are accurately and necessarily monitored. And determining a sensitive measuring point according to the simulation result of the temperature field and the relative humidity field of the high-voltage distribution room. And set up temperature, humidity, smoke sense check point at the measuring point, indoor outer humiture and smoke sense of real-time supervision provide the basis of action for environmental control system.
Reasonable and effective control logic
And controlling the temperature and humidity in the power distribution room to reach a target value by adopting a corresponding control mode according to the monitoring of the sensitive measuring point on the indoor temperature and humidity and the outdoor temperature and humidity. The control strategy takes different conditions of temperature and humidity as action judgment logic, gives different control modes, controls whether the fan and the dehumidifier act or not, and regulates the environment.
Sectional control of fan and dehumidifier
A plurality of sets of fans and dehumidifiers are configured in the power distribution room, the fans and the dehumidifiers can be controlled in a itemized mode by combining action judgment logic according to data of monitoring points, and the nearest fan or dehumidifier is started to adjust according to standard exceeding environment parameters given by the monitoring points, so that different control modes of independently starting and starting the fans and the dehumidifiers and the like are provided, and accurate regulation and control of most of spaces in the power distribution room can be realized.

Claims (3)

1. A method for adjusting an environmental conditioning system of a distribution room based on sensor optimization arrangement comprises the steps of: the optimal sensor arrangement method comprises the following steps: establishing a three-dimensional geometric simulation model of a distribution room of a transformer substation by using Ansys, carrying out simulation analysis on a temperature field and a humidity field of the distribution room by using the Ansys, obtaining temperature field and humidity field distribution simulation diagrams at different heights, and selecting temperature and humidity sensors for point distribution through the simulation diagrams;
the method for establishing the three-dimensional geometric simulation model of the transformer substation distribution room by using Ansys comprises the following steps of:
step A, collecting parameters needed by modeling of a distribution room of the transformer substation, including model parameters of the distribution room of the transformer substation and the number n of ground foot windows for ventilationdAnd parameters, the number of the ventilation fans nfThe method comprises the steps of obtaining parameters, including the number of switch cabinets of a power distribution room, the position of the power distribution room and the parameters, wherein model parameters of the power distribution room comprise the length L, the width W and the height H, parameters of a ground window for ventilation comprise the wall plane position of the ground window for ventilation and the resistance coefficient of the ground window for ventilation, parameters of a ventilator comprise the wall plane position of the ventilator and the flow of the ventilator, parameters Tout of the outdoor environment temperature of a transformer substation, parameters Dout of the outdoor relative humidity, parameters Twail of the wall inside the power distribution room of the transformer substation, parameters Tin of the indoor environment temperature and parameters Din of the indoor relative humidity, maximum values Tmax and Dmax of the environment temperature required by the operation environment inside the power distribution room of the transformer substation, and parameters of the switch cabinetkSwitch cabinet porosity ξ;
b, establishing a three-dimensional geometric simulation model of the distribution room of the transformer substation in Ansys by using the parameters required for modeling of the distribution room of the transformer substation, which are acquired in the step 1;
step C, simplifying the model; neglecting the influence of auxiliary equipment in the high-voltage distribution room on fluid flow, setting a heat source of a switch cabinet of the distribution room as a surface heat source, and setting the enclosure structure of the high-voltage distribution room as uniform and consistent heat transfer performance; thereby obtaining a simplified three-dimensional geometric simulation model of the substation distribution room;
the method for carrying out simulation analysis on the temperature field and the humidity field of the power distribution room by using the Ansys to obtain the temperature field and humidity field distribution simulation diagrams at different heights comprises the following steps:
d, determining a calculation domain of a flow field of the power distribution chamber on the premise of maximally representing the flow characteristics of fluid in the power distribution chamber, dispersing the simulation model in the calculation domain by adopting a hexahedral structural grid, automatically dividing the local positions of the power distribution chamber including a switch cabinet, a fan and a vent, and carrying out local encryption processing on the calculation domain to obtain the number of grid units and the number of nodes after grid refinement;
step E, setting boundary conditions and initial conditions of the simulation model by using the power distribution room, the foot margin window for ventilation, the ventilation fan, the power distribution room switch cabinet and the indoor and outdoor environmental parameters of the power distribution room in the step 1;
step F, setting a solving strategy, setting a calculation model as an RNG k-turbulence model, setting a solving method as a simple algorithm, setting the solving precision as a second-order attack style, and setting iteration times N and a termination condition; the simulation termination condition is that the energy residual is less than 10-7Or inlet and outlet flow error less than 10-4；
G, starting simulation until a simulation termination condition is reached, and acquiring temperature field and humidity field distribution simulation graphs at different heights;
the method for selecting the temperature and humidity sensors for point distribution through the simulation diagram comprises the following steps: selecting the temperature field and humidity field distribution simulation graphs with different heights respectively
Figure FDA0002412907540000021
4 points with the highest temperature and 4 points with the lowest temperature are selected at the H position to serve as the mounting points of the temperature sensors, so that representative temperature data of temperature sensitive areas with different heights can be obtainedAre respectively at
Figure FDA0002412907540000022
And 4 points with the highest relative humidity and 4 points with the lowest relative humidity are selected at the H position to serve as installation points of the humidity sensor, so that the representative relative humidity data of the relative humidity sensitive areas with different heights can be obtained.
2. The method for adjusting the automatic environment adjusting system of the substation distribution room according to claim 1, characterized in that: the adjusting method of the adjusting system comprises the following steps:
step 1, when a smoke monitoring element monitors that dense smoke exists, a temperature and humidity automatic control system of a substation distribution room sends out an alarm signal, and meanwhile, an exhaust fan is automatically started to operate at the maximum wind speed to discharge toxic and harmful gas in a switch room; when the smoke monitoring element does not monitor dense smoke, stopping exhausting, and switching to normal temperature and humidity monitoring;
step 2, when T is reachedIndoor use≥40℃，
Figure FDA0002412907540000023
TOutdoorsNo action when the temperature is more than or equal to 40 ℃; when T isIndoor use≥40℃，
Figure FDA0002412907540000031
TOutdoors≤TIndoor useWhen the temperature is lowered, after the temperature is maintained for 3-5 minutes, an exhaust fan of the high-voltage distribution room is started to perform indoor temperature reduction treatment;
step 3, when T is reachedIndoor use≥40℃、
Figure FDA0002412907540000032
And is
Figure FDA0002412907540000033
TOutdoors≤TIndoor useWhen the air is exhausted, the exhaust fan is started; when T isIndoor use≥40℃、
Figure FDA0002412907540000034
When is not in use, and
Figure FDA0002412907540000035
Toutdoors≤TIndoor useIf yes, starting an exhaust fan and a dehumidifier; when T isIndoor use≥40℃、
Figure FDA0002412907540000036
When is not in use, and
Figure FDA0002412907540000037
Toutdoors≥TIndoor useIf yes, starting a dehumidifier for dehumidification;
step 4, when T is reachedIndoor use＜40℃、
Figure FDA0002412907540000038
When is not in use, and
Figure FDA0002412907540000039
the exhaust fan is started; when T isIndoor use＜40℃、
Figure FDA00024129075400000310
And is
Figure FDA00024129075400000311
Starting a dehumidifier for dehumidification without starting an exhaust fan;
step 5, when T is reachedIndoor useAt < 40 ℃, e.g. the moisture content outside the chamber is less than the moisture content in the chamber, i.e. dOutdoor moisture content＜dMoisture content in the chamberStarting the exhaust fan until the indoor and outdoor moisture contents are equal, and closing the exhaust fan;
step 6, when T is reachedSurface temperature of building envelope＞TDew point temperatureIf the T is less than the threshold, the start-stop action of the exhaust fan is not interfered, and if the T is less than the thresholdSurface temperature of building envelope＜TDew point temperatureAnd after the time lasts for 3-5 minutes, the exhaust fan is forcibly closed.
3. The method for adjusting the automatic environment adjusting system of the substation distribution room according to claim 2, characterized in that: the method for calculating the outdoor moisture content and the indoor moisture content comprises the following steps:
step A, the indoor temperature T of the distribution roomIndoor useA and indoor relative humidity
Figure FDA00024129075400000312
For a control target, A is a temperature threshold value, and B is a humidity threshold value; real-time monitoring indoor air dry bulb temperature TIndoor dry ballRelative humidity of indoor air
Figure FDA00024129075400000313
Outdoor air dry bulb temperature TOutdoor dry ballRelative humidity of outdoor air
Figure FDA00024129075400000314
Step B, calculating the saturated partial pressure of the wet air at the corresponding dry-bulb temperature,
Ppartial pressure of saturation＝(5.96485+0.43432TTemperature of dry bulb+0.01804TTemperature of dry bulb 2+5.41671×10-5TTemperature of dry bulb 3+6.9644×10-6TTemperature of dry bulb 4)×102；
Step C, according to the formula of the moisture content of the air
Figure FDA00024129075400000315
Under the condition of measuring the dry bulb temperature and the wet bulb temperature of the air in real time, the indoor and outdoor moisture contents can be obtained;
step D, simultaneously according to the moisture content DMoisture contentCalculating the corresponding dew point temperature, i.e. TSurface temperature of building envelope＞TDew point temperature。
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