CN215498785U - Monitoring device for generator excitation power cabinet - Google Patents
Monitoring device for generator excitation power cabinet Download PDFInfo
- Publication number
- CN215498785U CN215498785U CN202122081577.8U CN202122081577U CN215498785U CN 215498785 U CN215498785 U CN 215498785U CN 202122081577 U CN202122081577 U CN 202122081577U CN 215498785 U CN215498785 U CN 215498785U
- Authority
- CN
- China
- Prior art keywords
- power cabinet
- processing unit
- central processing
- air
- monitoring device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The utility model discloses a monitoring device for a generator excitation power cabinet, which relates to the field of power cabinet monitoring, wherein monitoring equipment comprises a display module, a central processing unit and an air volume acquisition module for acquiring the air intake volume of the power cabinet; when the excitation system works, the air intake of the power cabinet is collected through the air volume collection module, the collected air intake is transmitted to the central processing unit, the central processing unit is provided with an air volume lower limit threshold value, the central processing unit quantifies the size of the ventilation volume of the cabinet body through the size relation between the air intake and the air volume lower limit threshold value, whether the ventilation of the power cabinet is normal or not is judged, the ventilation condition is displayed through the display module, when the ventilation of the power cabinet is judged to be abnormal, maintenance personnel is reminded to carry out corresponding maintenance and replacement, the normal ventilation of the power cabinet is ensured, the situation that the excitation system always runs under a high-temperature environment due to the reduction of the ventilation volume is avoided, adverse effects are generated on the normal operation of components of the excitation system, and the service life of the components is shortened.
Description
Technical Field
The utility model relates to the field of power cabinet monitoring, in particular to a monitoring device for a generator excitation power cabinet.
Background
The excitation device of the synchronous generator is an important device for providing excitation current for a generator rotor to establish a rotating magnetic field, an excitation system power cabinet generally adopts an N-1 configuration principle (when one power cabinet fails, the other power cabinet can bear all the excitation current of the generator), each power cabinet is a three-phase fully-controlled bridge rectifier circuit formed by 6 controllable silicon, and the controllable silicon is an important power device for providing large current output and is very important for ensuring the safe and stable operation of the generator.
The high-power silicon controlled rectifier of the excitation device often passes a large current in operation, and because the silicon controlled rectifier device and a rectifier bridge loop have a certain resistance value, the power cabinet generates a large amount of heat inevitably, so that the normal work and the device safety of the high-power silicon controlled rectifier device are ensured, an effective and reliable means is required to be adopted to carry out heat dissipation and ventilation on the high-power silicon controlled rectifier device, the working state and the wind temperature of a ventilation system are detected in time, and the power cabinet is cut off once abnormal, so that the equipment safety is ensured.
The excitation power cabinet body is designed into a structural form with upper and lower ventilation openings, the heat dissipation and ventilation of the power cabinet are realized by the air flow of a front door air inlet at the bottom of the cabinet and an air outlet at the top of the cabinet, and the air flow is driven to be realized by two axial flow fans (one for work and one for standby) arranged at the air outlet at the top of the cabinet.
In the state monitoring of the traditional power cabinet heat dissipation and ventilation system, a wind pressure switch and a contactor for driving a fan are adopted to judge whether the fan operates; and the platinum thermal resistor is adopted to monitor the temperature of the air duct, and once the two fans are detected to stop or the air temperature is overhigh in the operation of the excitation system, the power cabinet is immediately cut off and an alarm signal is sent. Starting and stopping of a fan of the heat dissipation and ventilation system of the power cabinet are controlled by an excitation equipment starting and stopping order, and when the excitation system starting order is received, the fan is started; and when an excitation shutdown order is received, the fan stops. When one fan fails, the excitation controller judges that another fan is started, and the problems that: the size of cabinet body air volume can not quantize, and when certain degree blockked up appeared in the air intake filter screen, detection device can't carry out accurate judgement to lead to the power cabinet to operate under higher temperature state for a long time, it is unfavorable to the operation of silicon controlled rectifier power device and other electronic components, influences the life of device.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems and designs a monitoring device for a generator excitation power cabinet.
The utility model realizes the purpose through the following technical scheme:
a monitoring devices for generator excitation power cabinet, install the axial flow cooling fan who is used for discharging the interior high-temperature air of power cabinet on the power cabinet, excitation system installs in the power cabinet, monitoring facilities includes display module, central processing unit and the amount of wind collection module that is used for gathering the power cabinet intake, the data signal output part of the amount of wind collection module is connected with central processing unit's data signal input part, central processing unit's signal end is connected with display module's signal end, central processing unit's control signal output part is connected with excitation system's control signal input part.
The utility model has the beneficial effects that: when the excitation system works, the air intake of the power cabinet is collected through the air volume collection module, the collected air intake is transmitted to the central processing unit, the central processing unit is provided with an air volume lower limit threshold value, the central processing unit quantifies the size of the ventilation volume of the cabinet body through the size relation between the air intake and the air volume lower limit threshold value, whether the ventilation of the power cabinet is normal or not is judged, the ventilation condition is displayed through the display module, when the ventilation of the power cabinet is judged to be abnormal, a maintainer is reminded to maintain and replace a filter screen of an air inlet of the power cabinet, the normal ventilation of the power cabinet is ensured, the situation that the excitation system always runs under a high-temperature environment due to the reduction of the ventilation volume is avoided, the adverse effect is generated on the normal running of components of the excitation system, and the service life of the components is shortened.
Drawings
FIG. 1 is a schematic structural diagram of a monitoring device for a generator excitation power cabinet according to the present invention;
FIG. 2 is a control schematic diagram of the monitoring device for the generator excitation power cabinet of the present invention;
wherein corresponding reference numerals are:
the system comprises a power cabinet 1, an axial flow cooling fan 2, an air volume acquisition module 3, a first temperature acquisition module 4, a second temperature acquisition module 5, a monitoring cabinet 6, a fluorescent optical fiber temperature measurement demodulator 7, an air outlet channel 8, a silicon controlled rectifier radiating fin 9 and a filter screen 10.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention are conventionally placed in use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following detailed description of embodiments of the utility model refers to the accompanying drawings.
As shown in fig. 1 and fig. 2, a monitoring device for a generator excitation power cabinet 1 is characterized in that the monitoring device comprises a display module, a central processing unit and an air volume collecting module 3 for collecting the air volume of the power cabinet 1, a data signal output end of the air volume collecting module 3 is connected with a data signal input end of the central processing unit, a signal end of the central processing unit is connected with a signal end of the display module, a control signal output end of the central processing unit is connected with a control signal input end of the excitation system, an air inlet of the power cabinet 1 is provided with a filter screen 10, the air volume collecting module 3 is an air volume sensor which is arranged in an air outlet channel 8 or an air inlet channel of the axial flow cooling fan 2, and the axial flow cooling fan 2 is directly arranged at an air outlet of the power cabinet 1, the filter screen 10 is not installed, so the detected air output of the air outlet channel 8 of the axial flow cooling fan 2 is the air input of the power collection cabinet 1, when the air quantity sensor is installed in the air inlet channel, the air inlet channel is installed at the air inlet of the power collection cabinet 1, the central processing unit is installed in the monitoring cabinet 6, and the display module is installed on the monitoring cabinet 6.
Before operation, firstly, setting wind flux thresholds Q1, Q2 and Q3 according to actual conditions on site, and sequentially reducing values of Q1, Q2 and Q3; the wind flux threshold Q1 is used for judging whether the ventilation of the power cabinet 1 is normal; the wind flux threshold Q2 is used for reminding maintenance personnel to check whether the air inlet is blocked or the filter screen 10 needs to be replaced; the wind flux threshold Q3 is used for power cabinet 1 ventilation system fault output.
The monitoring device further comprises two first temperature acquisition modules 4 and six second temperature acquisition modules 5, the two first temperature acquisition modules 4 are respectively used for acquiring the temperatures of the air inlet and the air outlet of the power cabinet 1, the six second temperature acquisition modules 5 are respectively used for acquiring the temperatures of the surfaces of the silicon controlled radiating fins 9, the data signal output ends of the two first temperature acquisition modules 4 and the data signal output ends of the six second temperature acquisition modules 5 are connected with the data signal input end of the central processing unit, and the first temperature acquisition modules 4 and the second temperature acquisition modules 5 are fluorescence optical fiber temperature measurement sensors.
When the excitation system operates, the air volume sensor detects the air intake volume of the power cabinet 1 collected in real time and transmits a data signal to the central processing unit, the central processing unit judges the size relationship between the received air intake volume data and Q1, Q2 and Q3 so as to determine whether the ventilation of the power cabinet 1 is normal, and when the air intake volume is greater than or equal to an air flux threshold value Q1, the ventilation of the power cabinet 1 is normal; when the intake air volume approaches to the air flux threshold Q2, the ventilation of the power cabinet 1 is abnormal, and a maintenance person is required to check whether the filter screen 10 of the air inlet needs to be replaced or blocked; when the intake air volume approaches to the air flux threshold Q3, the central processing unit controls the excitation system to start the unit to trip or stop in combination with comprehensive judgment of the temperature acquired by the six second temperature acquisition modules 5 when the ventilation fault of the power cabinet 1 occurs;
setting a difference threshold value and a temperature threshold value on a silicon controlled radiator 9 for a central processing unit, respectively acquiring the temperatures of an air inlet and an air outlet of a power cabinet 1 by two first temperature acquisition modules 4, respectively acquiring the temperatures of the surface of the silicon controlled radiator 9 by six second temperature acquisition modules 5, transmitting the acquired temperature data to the central processing unit, analyzing and calculating the temperature difference value of the air inlet and the air outlet by the central processing unit, judging the heating degree of the whole power cabinet 1 according to the temperature difference value and the preset difference threshold value, simultaneously combining the temperature on the silicon controlled radiator 9 and the preset temperature threshold value on the silicon controlled radiator 9, reminding maintenance personnel to check the positions of other electronic devices, copper bar joints and the like of the power cabinet 1 when the detected temperatures on the six silicon controlled radiators 9 are normal and the temperature difference values of the air inlet and the air outlet also belong to a normal range, the power cabinet 1 is prevented from accidents; when the temperature acquired by the six second temperature acquisition modules 5 exceeds the temperature threshold value on the silicon controlled cooling fin 9, the central processing unit controls the excitation system to start the unit to trip or stop; the temperature threshold value on the thyristor heat sink 9 is the maximum allowable value on the thyristor heat sink 9, and is determined according to the characteristic parameters of a thyristor manufacturer, and is generally below 125 ℃.
The monitoring equipment also comprises a Hall sensor for collecting bridge arm current of a rectifier bridge in the excitation system, and the data signal output ends of the Hall sensors are connected with the data signal input end of the central processing unit;
because the high-power thyristor is used for rectification in the power cabinet 1, the circuit is no longer just the traditional 50-cycle sine wave, and various waveforms appear; for the circuit, the real waveform cannot be reflected by adopting the traditional measuring method, so that the current of a bridge arm of a rectifier bridge is collected by adopting a Hall sensor, the Hall sensor can measure the current and the voltage of any waveform, the output end can truly reflect the waveform parameters of the current or the voltage of the input end, and the Hall sensor is connected to a central processing unit through a shielding wire.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (7)
1. A monitoring devices for generator excitation power cabinet, install the axial flow cooling fan who is used for discharging the interior high-temperature air of power cabinet on the power cabinet, excitation system installs in the power cabinet, a serial communication port, monitoring facilities includes display module, central processing unit and the amount of wind collection module that is used for gathering the power cabinet intake, the data signal output part of the amount of wind collection module is connected with central processing unit's data signal input part, central processing unit's signal end is connected with display module's signal end, central processing unit's control signal output part is connected with excitation system's control signal input part.
2. The monitoring device for the generator excitation power cabinet as claimed in claim 1, wherein the monitoring equipment further comprises two first temperature acquisition modules, the two first temperature acquisition modules are respectively used for acquiring the temperatures of the air inlet and the air outlet of the power cabinet, and the data signal output ends of the two first temperature acquisition modules are both connected with the data signal input end of the central processing unit.
3. The monitoring device for the generator excitation power cabinet as claimed in claim 2, wherein the monitoring equipment further comprises six second temperature acquisition modules, the six second temperature acquisition modules are respectively used for acquiring the temperature of the surface of the silicon controlled rectifier cooling fin, and data signal output ends of the six second temperature acquisition modules are all connected with a data signal input end of the central processing unit.
4. The monitoring device for the generator excitation power cabinet as claimed in any one of claims 1 to 3, wherein the monitoring device further comprises a hall sensor for collecting bridge arm current in the excitation system, and data signal output terminals of the hall sensor are connected with data signal input terminals of the central processing unit.
5. The monitoring device for the generator excitation power cabinet as claimed in claim 1, wherein the air volume collection module is an air volume sensor, an air inlet channel is installed at an air inlet of the power cabinet, and the air volume sensor is installed in the air inlet channel.
6. The monitoring device for the generator excitation power cabinet as claimed in claim 1, wherein the air volume collection module is an air volume sensor, and the air volume sensor is installed in an air outlet channel of the axial flow cooling fan.
7. The monitoring device for the generator excitation power cabinet as claimed in claim 3, wherein the first temperature acquisition module and the second temperature acquisition module are both fluorescence optical fiber temperature measurement sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122081577.8U CN215498785U (en) | 2021-08-31 | 2021-08-31 | Monitoring device for generator excitation power cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122081577.8U CN215498785U (en) | 2021-08-31 | 2021-08-31 | Monitoring device for generator excitation power cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215498785U true CN215498785U (en) | 2022-01-11 |
Family
ID=79766416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122081577.8U Active CN215498785U (en) | 2021-08-31 | 2021-08-31 | Monitoring device for generator excitation power cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215498785U (en) |
-
2021
- 2021-08-31 CN CN202122081577.8U patent/CN215498785U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105738809B (en) | A kind of motor temperature rise and vibration monitoring device and its implementation | |
| CN110989476A (en) | Monitoring system for remotely monitoring environment of electric power cabinet | |
| CN111193196A (en) | Temperature control safety system for electrical control cabinet | |
| CN207216449U (en) | Staircase switch board temperature-adjusting device | |
| CN215498785U (en) | Monitoring device for generator excitation power cabinet | |
| CN201830129U (en) | Excitation rectifier cabinet for carrying out on-line monitoring on temperature of silicon controlled rectifier | |
| CN104577988A (en) | Motor protection device based on thermoelectric conversion and power supply method of motor protection device | |
| CN106525265B (en) | Wireless temperature monitoring and indicating device for capacitor | |
| CN215180510U (en) | Online life monitoring and protecting device of thin film capacitor | |
| CN211905534U (en) | Lightning arrester on-line monitoring remote transmission system | |
| CN210954200U (en) | Online monitoring and diagnosing system for field suppression resistor | |
| CN209979082U (en) | High-voltage isolating switch temperature on-line monitoring system | |
| CN110365193A (en) | The cooling system and control method of subway regenerative braking energy feedback rating of set module | |
| CN215221508U (en) | Automatic cooling device with temperature alarm function for transformer room | |
| CN216309251U (en) | On-line monitoring system for temperature of cable joint of power transmission line | |
| CN201964573U (en) | Air conditioner controlling device | |
| CN108931702A (en) | A kind of excitation system low current test abnormality method of discrimination | |
| CN213183882U (en) | Cooling control system | |
| CN217213499U (en) | System for monitoring temperature of analysis equipment in float glass production line | |
| CN216846341U (en) | High-power liquid cooling power amplifier bridge test bench | |
| CN213515249U (en) | High-frequency power module for cooling tower | |
| CN220399612U (en) | Server power supply detection system | |
| CN209265249U (en) | A kind of high-voltage frequency converter water cooling monitoring system | |
| CN211695933U (en) | Industrial electric kiln based on SPWM modular control | |
| CN210348251U (en) | Transformer integrated controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |