CN212305993U - Water cooling system of static frequency converter - Google Patents
Water cooling system of static frequency converter Download PDFInfo
- Publication number
- CN212305993U CN212305993U CN202021276081.5U CN202021276081U CN212305993U CN 212305993 U CN212305993 U CN 212305993U CN 202021276081 U CN202021276081 U CN 202021276081U CN 212305993 U CN212305993 U CN 212305993U
- Authority
- CN
- China
- Prior art keywords
- water
- frequency converter
- water inlet
- temperature
- transmitter
- 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
Abstract
The utility model discloses a water cooling system of a static frequency converter, which comprises an internal circulation loop, an external circulation loop, a plate heat exchanger and a deionization branch; the inner loop comprises a static frequency converter, a conductivity transmitter, a second temperature transmitter, an electric heater, a main circulating pump and a first temperature transmitter, wherein the water outlet end of the static frequency converter is connected with the water inlet end of the main circulating pump through the conductivity transmitter, the second temperature transmitter and the electric heater in sequence, the water outlet end of the main circulating pump is connected with the inner loop water inlet end of the plate heat exchanger, and the inner loop water outlet end of the plate heat exchanger enters the water inlet end of the static frequency converter through the first temperature transmitter. The utility model provides a static converter water cooling system can solve the problem that condensation and conductivity are high when the short-time work system, full play water cooling system's advantage.
Description
Technical Field
The utility model relates to a static converter water cooling system.
Background
At present, domestic static frequency converters with completely independent intellectual property rights are firstly used in hundreds of megawatt pumping units in 2015, and are continuously applied to key equipment such as heavy combustion engines, phase regulators and the like, so that China gradually gets rid of dependence on imported products. The static frequency converter is the first-choice dragging equipment for starting the pump of the pumping and storage unit under working conditions, can drag the pumping and storage unit from a static state to a rated rotating speed, can stabilize the unit at a certain rotating speed, and is particularly suitable for large-scale pumped storage power stations with large capacity and multiple units.
The static frequency converter is used for starting a unit by utilizing an alternating current power supply with variable frequency generated by the thyristor frequency converter, and high-power electronic devices such as a thyristor and the like generate large heat in the working process, so that a cooling system is a key factor influencing the performance and reliability of the static frequency converter. At present, a cooling system of a domestic static frequency converter mainly adopts an air cooling type, the air cooling technology is mature, the cost is lower, and the application range is wide, but the size of a screen cabinet of an air cooling type SFC product is larger, and the requirements on the arrangement space of an underground factory building and the heating and ventilation design capacity are higher. Compared with an air cooling system, the water cooling system has high heat dissipation efficiency, and under the condition of the same heat dissipation capacity, the product structure is more compact, and the system capacity coverage range is wider. Therefore, pure water cooling is one of the most obvious advantages and the best application prospect in the cooling mode of the power electronic product at present.
At present, pure water cooling is widely applied to SVC, SVG, high-capacity flexible direct current converter valve products and conventional high-voltage direct current converter valves, and the technology is mature. Because the static frequency converter is a short-time working system, a main circulating pump of the water cooling system is in a stop state when the frequency converter is stopped, a monitoring element cannot acquire the conditions of the conductivity and the water temperature in the whole system, the problem of local condensation or high conductivity is easy to occur, the valve bank is damaged by short circuit when the frequency converter is serious, and the development and the application of the frequency converter are restricted.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that, overcome prior art not enough, the utility model provides a static converter water cooling system can solve the problem that condensation and conductivity are high when the short-time work system, full play water cooling system's advantage.
In order to solve the technical problem, the technical scheme of the utility model is that:
a water cooling system of a static frequency converter comprises an inner circulation loop, an outer circulation loop, a plate heat exchanger and a deionization branch;
the internal circulation loop comprises a static frequency converter, a conductivity transmitter, a second temperature transmitter, an electric heater, a main circulation pump and a first temperature transmitter, wherein the water outlet end of the static frequency converter is connected with the water inlet end of the main circulation pump through the conductivity transmitter, the second temperature transmitter and the electric heater in sequence;
the external circulation loop comprises an external cooling water inlet, an electric three-way valve and an external cooling water outlet, the external cooling water inlet is connected with the electric three-way valve, two outlets of the electric three-way valve are respectively connected with an external circulation water inlet end and a short-circuit pipeline of the plate heat exchanger, and an external circulation water outlet end of the plate heat exchanger is connected to the external cooling water outlet after being converged with the short-circuit pipeline;
the deionization branch comprises an electromagnetic valve, a deionization tank and a precision filter, wherein the water inlet end of the electromagnetic valve is connected with the internal circulation water outlet end of the plate heat exchanger, and the water outlet end of the electromagnetic valve is connected with the water inlet end of the main circulation pump through the deionization tank and the precision filter in sequence;
the static frequency converter is installed in the equipment room, a temperature and humidity transmitter is arranged in the equipment room and is suitable for monitoring the indoor temperature and humidity of the equipment room.
Furthermore, the water inlet end of the main circulating pump is connected with a pressure stabilizing device.
Further, the main circulating pump comprises a first main circulating pump and a second main circulating pump, and the first main circulating pump and the second main circulating pump are arranged in parallel.
By adopting the technical scheme, the utility model discloses following beneficial effect has:
1. the utility model solves the problems of high conductivity and condensation when the static frequency converter works for a short time by adopting a mode of combining real-time monitoring starting with timing starting to the water cooling system;
2. the utility model discloses a short-term work system compares in continuous operation water cooling system, has the advantage that the energy consumption is low.
3. The utility model discloses a components and parts live time such as water pump, electric valve, deionization branch road, electric heater reduces, has prolonged the holistic life of water cooling system.
Drawings
Fig. 1 is a schematic diagram of a water cooling system of a static frequency converter according to the present invention;
fig. 2 is a schematic diagram of the method for monitoring the start of the water cooling system of the static frequency converter in real time according to the present invention;
fig. 3 is a schematic diagram of the method for starting the water cooling system of the static frequency converter at regular time according to the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
As shown in figure 1, the water cooling system of the static frequency converter comprises an inner circulation loop, an outer circulation loop, a plate heat exchanger 7 and a deionization branch.
The internal circulation loop comprises a static frequency converter 1, a conductivity transmitter 2, a second temperature transmitter 9, an electric heater 3, a main circulation pump and a first temperature transmitter 8, the main circulation pump comprises a first main circulation pump 5 and a second main circulation pump 6, the first main circulation pump 5 and the second main circulation pump 6 are arranged in parallel, one is used, the water outlet end of the static frequency converter 1 is connected with the water inlet end of the main circulation pump sequentially through the conductivity transmitter 2, the second temperature transmitter 9 and the electric heater 3, the water outlet end of the main circulation pump is connected with the internal circulation water inlet end of the plate heat exchanger 7, and the internal circulation water outlet end of the plate heat exchanger 7 enters the water inlet end of the static frequency converter 1 through the first temperature transmitter 8; the high-temperature water that goes out the water outlet end outflow during static converter 1 operation, through the drive of main circulating pump, through the monitoring of conductivity changer 2, second temperature transmitter 9, flow through electric heater 3 and main circulating pump after, get into plate heat exchanger 7 and cool off, the heat is taken away by outer cooling water, and the inner loop of plate heat exchanger 7 goes out the low-temperature water that the water outlet end outflow, gets into static converter 1 through first temperature transmitter 8 and cools off.
The external circulation loop comprises an external cooling water inlet 14, an electric three-way valve 13 and an external cooling water outlet 15, the external cooling water inlet 14 is connected with the electric three-way valve 13, two outlets of the electric three-way valve 13 are respectively connected with an external circulation water inlet end and a short-circuit pipeline of the plate heat exchanger 7, and an external circulation water outlet end of the plate heat exchanger 7 is connected to the external cooling water outlet 15 after being converged with the short-circuit pipeline; the low-temperature water flows in from the external cooling water inlet 14 and exchanges heat with high-temperature water in the plate heat exchanger 7, the high-temperature water is changed after heat is absorbed, the high-temperature water flows out from the external cooling water outlet 15, when the static frequency converter 1 is shut down, the electric three-way valve 13 adjusts the flow entering the plate heat exchanger through valve position change, and condensation of a thyristor is avoided when the water temperature in the internal circulation loop is too low.
The deionization branch comprises an electromagnetic valve 10, a deionization tank 11 and a precision filter 12, the water inlet end of the electromagnetic valve 10 is connected with the water outlet end of the internal circulation of the plate heat exchanger 7, and the water outlet end of the electromagnetic valve 10 is connected with the water inlet end of the main circulation pump through the deionization tank 11 and the precision filter 12 in sequence. The deionization branch is controlled to be switched on and off by an electromagnetic valve 10, and water is deionized and filtered by a deionization tank 11 and a precision filter 12 and then returns to the internal circulation loop.
The static frequency converter 1 is installed in an equipment room, a temperature and humidity transmitter 16 is arranged in the equipment room, and the temperature and humidity transmitter 16 is suitable for monitoring the indoor temperature and humidity of the equipment room.
As shown in figure 1, the water inlet end of the main circulating pump is connected with a pressure stabilizing device 4, so that the pressure change of the system caused by water thermal expansion and cold contraction is prevented from being overlarge.
As shown in figures 1-3, the utility model discloses a method of real-time supervision start-up and timing start-up controls conductivity and temperature.
1. As shown in fig. 2, under the condition of real-time monitoring and starting, according to the set timing starting time of the static frequency converter 1, if the timing starting time is not reached, the conductivity transmitter 2, the second temperature transmitter 9 and the first temperature transmitter 8 are adopted to perform real-time monitoring on the conductivity and the water temperature values. At the moment, water in the water cooling system is not circulated, and the conductivity and water temperature values can only reflect the conditions of the measuring points.
The first condition is as follows:
when the conductivity reaches a high conductivity threshold value and the water temperature reaches a low water temperature threshold value, the main circulating pump is started, the electromagnetic valve 10 is opened, the deionization branch is started to treat the conductivity, the electric heater 3 is started to heat water, the electric three-way valve 13 reduces the opening degree to reduce the flow passing through the plate heat exchanger 7 until the low conductivity stop threshold value and the high water temperature stop threshold value are reached, the deionization branch and the electric heater 3 are closed, and the main circulating pump is closed.
Case two:
when the conductivity reaches a high conductivity threshold value and the water temperature does not reach a low water temperature threshold value, the main circulating pump is started, the electromagnetic valve 10 is opened, the deionization branch is started to treat the conductivity until the conductivity reaches a low conductivity stop threshold value, the deionization branch is closed, and the main circulating pump is closed.
Case three:
the conductivity does not reach the conductivity high threshold value, the water temperature reaches the water temperature low threshold value, then the main circulating pump is started, the electric heater 3 is started to heat the water, the electric three-way valve 13 reduces the opening degree to reduce the flow passing through the plate heat exchanger 7 until the conductivity low stop threshold value and the water temperature high stop threshold value are reached, the deionization branch and the electric heater 3 are closed, and the main circulating pump is closed.
Case four:
and if the conductivity does not reach the high conductivity threshold value and the temperature does not reach the low water temperature threshold value, the main circulating pump is not started.
2. As shown in fig. 3, in the case of the timing start detection, if it is determined that the timing start time is reached according to the set timing start time of the stationary frequency converter 1, the main circulation pump is started, and the conductivity and water temperature information is acquired by using the conductivity transmitter 2, the second temperature transmitter 9, and the first temperature transmitter 8. After the water in the water cooling system circulates, the conductivity and the water temperature information can be accurately measured.
The first condition is as follows:
when the conductivity reaches a high conductivity threshold value and the water temperature reaches a low water temperature threshold value, the electromagnetic valve 10 is opened to start the deionization branch to treat the conductivity, the electric heater 3 is started to heat water, the electric three-way valve 13 reduces the opening degree to reduce the flow passing through the plate heat exchanger 7 until the low conductivity stop threshold value and the high water temperature stop threshold value are reached, the deionization branch and the electric heater 3 are closed, and the main circulating pump is closed.
Case two:
when the conductivity reaches the high conductivity threshold value and the water temperature does not reach the low water temperature threshold value, the electromagnetic valve 10 is opened, the deionization branch is started to treat the conductivity until the conductivity reaches the low conductivity stop threshold value, the deionization branch is closed, and the main circulating pump is closed.
Case three:
when the conductivity does not reach the conductivity high threshold value and the water temperature reaches the water temperature low threshold value, the electric heater 3 is started to heat water, the electric three-way valve 13 reduces the opening degree to reduce the flow passing through the plate heat exchanger 7 until the conductivity low stop threshold value and the water temperature high stop threshold value are reached, the deionization branch and the electric heater 3 are closed, and the main circulating pump is closed.
Case four:
if the conductivity does not reach the high conductivity threshold value and the water temperature does not reach the low water temperature threshold value, the main circulating pump is stopped after running for a period of time.
3. As shown in fig. 1, the temperature and humidity transmitter 16 monitors the temperature and humidity in the equipment room, calculates the dew point temperature, and sets a water temperature low threshold and a water temperature high stop threshold according to the dew point temperature:
Tstart＝Td+ΔT1
wherein Tstart is a water temperature low threshold value, Td is a dew point temperature, and delta T1 is a starting margin value;
Toff＝Td+ΔT2
wherein Toff is a water temperature high stop threshold value, Td is a dew point temperature, and Delta T2 is a stop margin value;
wherein Δ T1 < Δ T2.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. The utility model provides a static converter water cooling system which characterized in that: the device comprises an inner circulation loop, an outer circulation loop, a plate heat exchanger (7) and a deionization branch;
the internal circulation loop comprises a static frequency converter (1), a conductivity transmitter (2), a second temperature transmitter (9), an electric heater (3), a main circulation pump and a first temperature transmitter (8), wherein the water outlet end of the static frequency converter (1) is connected with the water inlet end of the main circulation pump through the conductivity transmitter (2), the second temperature transmitter (9) and the electric heater (3) in sequence, the water outlet end of the main circulation pump is connected with the internal circulation water inlet end of the plate heat exchanger (7), and the internal circulation water outlet end of the plate heat exchanger (7) enters the water inlet end of the static frequency converter (1) through the first temperature transmitter (8);
the external circulation loop comprises an external cooling water inlet (14), an electric three-way valve (13) and an external cooling water outlet (15), the external cooling water inlet (14) is connected with the electric three-way valve (13), two outlets of the electric three-way valve (13) are respectively connected with an external circulation water inlet end of the plate heat exchanger (7) and a short-circuit pipeline, and an external circulation water outlet end of the plate heat exchanger (7) is connected to the external cooling water outlet (15) after being converged with the short-circuit pipeline;
the deionization branch comprises an electromagnetic valve (10), a deionization tank (11) and a precision filter (12), wherein the water inlet end of the electromagnetic valve (10) is connected with the water outlet end of the internal circulation of the plate heat exchanger (7), and the water outlet end of the electromagnetic valve (10) is connected with the water inlet end of the main circulation pump through the deionization tank (11) and the precision filter (12) in sequence;
the static frequency converter (1) is installed in the equipment room, a temperature and humidity transmitter (16) is arranged in the equipment room, and the temperature and humidity transmitter (16) is suitable for monitoring the indoor temperature and humidity of the equipment room.
2. The water cooling system for the static frequency converter according to claim 1, wherein: the water inlet end of the main circulating pump is connected with a pressure stabilizing device (4).
3. The water cooling system for the static frequency converter according to claim 2, wherein: the main circulating pump comprises a first main circulating pump (5) and a second main circulating pump (6), and the first main circulating pump (5) and the second main circulating pump (6) are arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021276081.5U CN212305993U (en) | 2020-07-03 | 2020-07-03 | Water cooling system of static frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021276081.5U CN212305993U (en) | 2020-07-03 | 2020-07-03 | Water cooling system of static frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212305993U true CN212305993U (en) | 2021-01-05 |
Family
ID=73936892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021276081.5U Active CN212305993U (en) | 2020-07-03 | 2020-07-03 | Water cooling system of static frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212305993U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111712111A (en) * | 2020-07-03 | 2020-09-25 | 常州博瑞电力自动化设备有限公司 | Static frequency converter water cooling system and conductivity and water temperature control method thereof |
-
2020
- 2020-07-03 CN CN202021276081.5U patent/CN212305993U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111712111A (en) * | 2020-07-03 | 2020-09-25 | 常州博瑞电力自动化设备有限公司 | Static frequency converter water cooling system and conductivity and water temperature control method thereof |
| CN111712111B (en) * | 2020-07-03 | 2024-06-14 | 常州博瑞电力自动化设备有限公司 | Static frequency converter water cooling system and conductivity and water temperature control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108091903B (en) | Fuel cell stack thermal management device, system and method | |
| CN103582396A (en) | Outer cooling system with stored cold for direct current converter valve and operation method thereof | |
| CN202260470U (en) | SVC hermetic type circulating purified water cooling system | |
| CN110329112B (en) | Comprehensive thermal management system for automobile | |
| CN102368615A (en) | SVC (static vary compensation) closed type circulating pure water cooling system | |
| WO2019037309A1 (en) | Cooling device and liquid-cooled heat dissipation system | |
| CN204006829U (en) | A kind of energy-efficient liquid cooling origin system | |
| CN212305993U (en) | Water cooling system of static frequency converter | |
| CN109990625B (en) | Intelligent control compact dry-wet combined evaporation type air cooler | |
| CN113784582B (en) | Pump-driven two-phase liquid cooling system for realizing stable flow distribution and flow control method | |
| WO2024040867A1 (en) | Liquid cooling system | |
| CN216903111U (en) | Hybrid external cooling system for energy storage battery | |
| CN111148413A (en) | Converter valve cooling system | |
| CN111712111B (en) | Static frequency converter water cooling system and conductivity and water temperature control method thereof | |
| CN102538108A (en) | Natural cold source uninterrupted precise air conditioner | |
| CN104008860A (en) | Main transformer heat exchanging device with functions of intelligent photovoltaic frequency-conversion heat pump and application method thereof | |
| CN203812693U (en) | Main-transformer heat exchange device with intelligent photovoltaic variable-frequency heat pump function | |
| CN103607101A (en) | Immersed type thermoelectricity refrigeration device for direct current converter valve | |
| CN114497800A (en) | Multi-stage cooling system applied to energy storage power station and control method | |
| CN113660835A (en) | Integrated cooling system and method for energy storage alternating current side | |
| CN203706799U (en) | Main transformer plate type cooling device with SF6 medium as coolant | |
| CN215813841U (en) | Dynamic energy consumption control system for cooling water of proton heavy ion accelerator | |
| CN205104799U (en) | Flexible alternating current transmission device water cooling system | |
| CN220753548U (en) | Thermal management system of energy storage power station and energy storage power station | |
| CN219350370U (en) | Energy storage 3kW liquid cooling unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |