CN111328252A - Temperature-saving device of converter station valve external cooling system - Google Patents
Temperature-saving device of converter station valve external cooling system Download PDFInfo
- Publication number
- CN111328252A CN111328252A CN202010251690.3A CN202010251690A CN111328252A CN 111328252 A CN111328252 A CN 111328252A CN 202010251690 A CN202010251690 A CN 202010251690A CN 111328252 A CN111328252 A CN 111328252A
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- temperature
- temperature transmitter
- valve
- water
- cooling system
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Links
- 238000001816 cooling Methods 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20927—Liquid coolant without phase change
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20945—Thermal management, e.g. inverter temperature control
Abstract
The invention relates to a temperature-saving device of a converter station valve external cooling system, which comprises a temperature transmitter T2, a temperature transmitter T1, a heater H, a water delivery pump P and an electric valve M, wherein the temperature transmitter T2 is connected with the heater H; the temperature transmitter T2, the temperature transmitter T1, the heater H and the water delivery pump P are sequentially arranged on a circulating water pipe of an external valve cooling coil of the converter station external valve cooling system, and a circulating water pipe which can be opened or closed through the electric valve M is further arranged between a water outlet of the water delivery pump P and a water outlet of the temperature transmitter T2; the temperature transmitter T1 and the temperature transmitter T2 can control the opening or closing of the electric valve M through the water temperature; the temperature transmitter T1 and the temperature transmitter T2 can control the on of the heater H through the water temperature. The invention can effectively increase the indoor and outdoor temperature difference of the valve cooling system, reduce the operation time of the heater of the valve cooling system, save energy, improve the operation safety and economy of the high-voltage direct-current transmission system and ensure that the large power industry produces and operates in a green and environment-friendly way.
Description
Technical Field
The invention relates to a converter station valve external cooling system, in particular to a converter station valve external cooling system temperature-saving device.
Background
In a high-voltage direct-current transmission system, a converter valve is core equipment of a direct-current transmission project, and three-phase alternating-current voltage is sequentially connected to a direct-current end to obtain expected direct-current voltage and control over power. Converter valves generate a large amount of heat during operation, which requires a valve cooling system to dissipate the heat. The valve cooling system is divided into an inner cooling system and an outer cooling system, the inner cooling system cools the converter valve device to remove heat of all components on the valve body out of the valve hall, the temperature of the converter valve is guaranteed to be within a normal operation range, and the outer cooling system cools the inner cooling system to reduce the temperature of the inner cooling system to a lower range.
When the outdoor temperature is very low in winter or the converter valve runs at low load or has zero load, the condensation phenomenon is caused by the fact that the temperature of valve cooling water entering the converter valve is too low. The valve cooling system needs to maintain a certain temperature, and the long-time heating for maintaining the temperature of the valve external cooling system causes a large amount of electric energy loss, increases the operation cost of the electric power system, and reduces the economic benefit of the electric power system.
Disclosure of Invention
The invention aims to overcome the defects that a large amount of electric energy loss is caused by maintaining the temperature of an external valve cooling system through long-time heating, the operation cost of a power system is increased, and the economic benefit of the power system is reduced, and provides the temperature-saving device of the external valve cooling system of the converter station.
The technical scheme adopted by the invention is as follows:
a temperature-saving device of a cooling system outside a converter station valve comprises a temperature transmitter T2, a temperature transmitter T1, a heater H, a water delivery pump P and an electric valve M; the temperature transmitter T2, the temperature transmitter T1, the heater H and the water delivery pump P are sequentially arranged on a circulating water pipe of a valve external cooling coil of a converter station valve external cooling system, water in the circulating water pipe flows in the circulating water pipe through the water delivery pump P, a converter valve is arranged between the temperature transmitter T2 and the temperature transmitter T1, and a backflow water pipe which can be opened or closed through an electric valve M is further arranged between a water outlet of the water delivery pump P and a water outlet of the temperature transmitter T2; the temperature transmitter T1 and the temperature transmitter T2 can control the opening or closing of the electric valve M through the water temperature; the temperature transmitter T1 and the temperature transmitter T2 can control the opening or closing of the heater H according to the water temperature.
The temperature transmitter T1 and the temperature transmitter T2 are respectively provided with a control relay, the electric valve M is provided with an open valve time relay KSJ and a close valve time relay GSJ, and the heater H is provided with two groups of heating devices of a thermal contactor C1 and a thermal contactor C2; the control relay of the temperature transmitter T1 is set to be three contacts of T1-1, T1-2 and T1-3, the control relay of the temperature transmitter T2 is provided with three contacts of T2-1, T2-2 and T2-3, the T1-1 contact of the control relay of the temperature transmitter T1 is connected with the T2-2 contact and the T2-3 contact of the control relay of the temperature transmitter T2 in parallel and then respectively connected with the valve opening time relay KSJ and the valve closing time relay GSJ, and the T2-3 contact of the control relay of the temperature transmitter T2 is connected with the T1-2 contact and the T1-3 contact of the control relay of the temperature transmitter T1 in parallel and then respectively connected with the thermal contactor C1 and the thermal contactor C2.
The heater H can stop heating according to the water temperature control thermal contactor C1 or the thermal contactor C2, the thermal contactor C1 stops heating when the water temperature reaches 17.5 degrees, and the thermal contactor C2 stops heating when the water temperature reaches 16.5 degrees.
The invention has the beneficial effects that:
1. the invention can effectively increase the indoor and outdoor temperature difference of the valve cooling system, reduce the operation time of the heater of the valve cooling system, greatly save energy, improve the operation safety and economy of the high-voltage direct-current transmission system and ensure that the large power industry produces and operates more environment-friendly.
2. The invention not only can greatly reduce the running time of the high-power heater of the valve internal cooling system, but also can effectively prevent the valve external cooling system from being damaged due to the fact that the circulating water is too low to cause 'frozen pipe'.
3. The invention can also prevent the valve hall air conditioner from consuming a large amount of electric energy due to the over-low temperature and the high humidity of the valve hall; the energy-saving effect is very obvious.
Drawings
FIG. 1 is a schematic view of the installation position of the present invention;
fig. 2 is a schematic diagram of the circuit control of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1-2, the invention relates to a temperature-saving device for a cooling system outside a converter station valve, which comprises a temperature transmitter T2, a temperature transmitter T1, a heater H, a water delivery pump P and an electric valve M. The temperature transmitter T2, the temperature transmitter T1, the heater H and the water delivery pump P are sequentially arranged on a circulating water pipe of a valve external cooling coil of a converter station valve external cooling system, water in the circulating water pipe flows in the circulating water pipe through the water delivery pump P, and a converter valve is arranged between the temperature transmitter T2 and the temperature transmitter T1.
A return water pipe which can be opened or closed by an electric valve M is also arranged between the water outlet of the water delivery pump P and the water outlet of the temperature transmitter T2. The electric valve M on the water return pipe is opened or closed, so that the water outlet of the water delivery pump P can form a shunt.
The temperature transmitter T1 and the temperature transmitter T2 are in circuit connection with the electric valve M and the heater H, when the water temperature is within an allowable range, the temperature transmitter T1 and the temperature transmitter T2 control the electric valve M to be opened by detecting the water temperature, so that a water outlet of the water delivery pump P is divided, and part of water circulates back to the converter valve; when the water temperature is lower than the allowable range, the temperature transmitter T1 and the temperature transmitter T2 control the heater H to be started by detecting the water temperature, and when the water temperature is in the allowable range, the heater H is controlled to stop heating, and meanwhile, the electric valve M is started, so that a water outlet of the water delivery pump P is divided, and part of water circulates back to the converter valve.
In order to further accurately control the electric valve M and the heater H, a temperature transmitter T1 and a temperature transmitter T2 are respectively provided with a control relay, the electric valve M is provided with an open valve time relay KSJ and a close valve time relay GSJ, and the heater H is provided with two groups of heating devices of a thermal contactor C1 and a thermal contactor C2; the control relay of the temperature transmitter T1 is provided with three contacts T1-1, T1-2 and T1-3, the control relay of the temperature transmitter T2 is provided with three contacts T2-1, T2-2 and T2-3, the T1-1 contact of the control relay of the temperature transmitter T1 is connected with the T2-2 contact and the T2-3 contact of the control relay of the temperature transmitter T2 in parallel and then respectively connected with the valve opening time relay KSJ and the valve closing time relay GSJ, and the T2-3 contact of the control relay of the temperature transmitter T2 is connected with the T1-2 contact and the T1-3 contact of the control relay of the temperature transmitter T1 in parallel and then respectively connected with the thermal contactor C1 and the thermal contactor C2.
The working principle is as follows: when the temperature transmitter T1 detects that the water temperature is less than 20 degrees, and the temperature transmitter T2 detects that the water temperature is more than 7 degrees, the T1-1 contact and the T2-1 contact are closed at the same time, the valve opening time relay KSJ is electrified, the valve opening time relay KSJ is closed every 5min for 3s, the electric valve M is opened greatly, and the T2-1 contact is opened until the temperature transmitter T2 detects that the water temperature is less than 7 degrees. When the temperature transmitter T1 detects that the water temperature is less than 20 degrees, and the temperature transmitter T2 detects that the water temperature is less than 5 degrees, the T1-1 contact and the T2-2 contact are closed at the same time, the valve closing time relay GSJ is electrified, the valve closing time relay GSJ is closed for 3s every 5min, the electric valve M is opened slightly, and the T2-2 contact is opened until the temperature transmitter T2 detects that the water temperature is more than 5 degrees. When the temperature transmitter T1 detects that the water temperature is less than 17 degrees, and the temperature transmitter T2 detects that the water temperature is less than 7 degrees, the T1-2 contact and the T2-3 contact are closed simultaneously, and the thermal contactor C1 is electrified to heat the water temperature. When the temperature transmitter T1 detects that the water temperature is less than 15 degrees, and the temperature transmitter T2 detects that the water temperature is less than 7 degrees, the T1-3 contact and the T2-3 contact are closed simultaneously, and the thermal contactor C2 is electrified to heat the water temperature. Thermal contactor C1 and thermal contactor C2 may also be designed to automatically stop heating based on water temperature, thermal contactor C1 stopping heating when water temperature reaches 17.5 deg., and thermal contactor C2 stopping heating when water temperature reaches 16.5 deg..
In addition, the converter station valve external cooling system temperature-saving device can also be used for cooling systems of thyristors, IGBTs and the like of the STATOM system.
Claims (4)
1. The utility model provides a converter station valve external cooling system temperature regulating device which characterized in that: the temperature-saving device of the converter station valve external cooling system comprises a temperature transmitter T2, a temperature transmitter T1, a heater H, a water delivery pump P and an electric valve M; the temperature transmitter T2, the temperature transmitter T1, the heater H and the water delivery pump P are sequentially arranged on a circulating water pipe of a valve external cooling coil of a converter station valve external cooling system, water in the circulating water pipe flows in the circulating water pipe through the water delivery pump P, a converter valve is arranged between the temperature transmitter T2 and the temperature transmitter T1, and a backflow water pipe which can be opened or closed through an electric valve M is further arranged between a water outlet of the water delivery pump P and a water outlet of the temperature transmitter T2; the temperature transmitter T1 and the temperature transmitter T2 can control the opening or closing of the electric valve M through the water temperature; the temperature transmitter T1 and the temperature transmitter T2 can control the opening or closing of the heater H according to the water temperature.
2. The converter station valve external cooling system temperature adjustment device of claim 1, wherein: the temperature transmitter T1 and the temperature transmitter T2 are respectively provided with a control relay, the electric valve M is provided with an open valve time relay KSJ and a close valve time relay GSJ, and the heater H is provided with two groups of heating devices of a thermal contactor C1 and a thermal contactor C2; the control relay of the temperature transmitter T1 is provided with three contacts T1-1, T1-2 and T1-3, the control relay of the temperature transmitter T2 is provided with three contacts T2-1, T2-2 and T2-3, the T1-1 contact of the control relay of the temperature transmitter T1 is connected with the T2-2 contact and the T2-3 contact of the control relay of the temperature transmitter T2 in parallel and then respectively connected with the valve opening time relay KSJ and the valve closing time relay GSJ, and the T2-3 contact of the control relay of the temperature transmitter T2 is connected with the T1-2 contact and the T1-3 contact of the control relay of the temperature transmitter T1 in parallel and then respectively connected with the thermal contactor C1 and the thermal contactor C2.
3. The converter station valve external cooling system temperature adjustment device of claim 2, wherein: the thermal contactor C1 and the thermal contactor C2 can also stop heating automatically according to the water temperature, the thermal contactor C1 stops heating when the water temperature reaches 17.5 degrees, and the thermal contactor C2 stops heating when the water temperature reaches 16.5 degrees.
4. A method for the temperature adjustment of the converter station valve external cooling system by the temperature adjustment device according to any one of claims 1-3, characterized by: the method comprises the following steps of (1) opening a water delivery pump P to enable circulating water to circularly flow in a water delivery pipeline containing a temperature transmitter T2, a temperature transmitter T1, a heater H, an electric valve M and a converter valve; (2) the temperature transmitter T1 and the temperature transmitter T2 can control the opening or closing of the electric valve M through the water temperature, so that the water outlet of the water delivery pump P can form a shunt; (3) the temperature transmitter T1 and the temperature transmitter T2 can control the opening or closing of the heater H through the water temperature, so as to heat the circulating water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010251690.3A CN111328252A (en) | 2020-04-01 | 2020-04-01 | Temperature-saving device of converter station valve external cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010251690.3A CN111328252A (en) | 2020-04-01 | 2020-04-01 | Temperature-saving device of converter station valve external cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111328252A true CN111328252A (en) | 2020-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010251690.3A Pending CN111328252A (en) | 2020-04-01 | 2020-04-01 | Temperature-saving device of converter station valve external cooling system |
Country Status (1)
| Country | Link |
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| CN (1) | CN111328252A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112919796A (en) * | 2021-01-27 | 2021-06-08 | 通鼎互联信息股份有限公司 | Heating and cooling system for optical fiber preform sintering furnace |
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| CN209419234U (en) * | 2019-01-23 | 2019-09-20 | 中国南方电网有限责任公司超高压输电公司广州局 | A kind of cooling outer cold water aerial drainage control system of Converter Station Valve |
| CN212413638U (en) * | 2020-04-01 | 2021-01-26 | 云南电网有限责任公司楚雄供电局 | Temperature-saving device of converter station valve external cooling system |
-
2020
- 2020-04-01 CN CN202010251690.3A patent/CN111328252A/en active Pending
Patent Citations (15)
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| US5144811A (en) * | 1991-01-10 | 1992-09-08 | Hughes Aircraft Company | Condensation control system for water-cooled electronics |
| JP2000329400A (en) * | 1999-05-17 | 2000-11-30 | Matsushita Refrig Co Ltd | Heat pump hot water supply apparatus |
| JP2008037302A (en) * | 2006-08-08 | 2008-02-21 | Nissan Motor Co Ltd | Vehicle cooling system |
| CN201488163U (en) * | 2009-08-21 | 2010-05-26 | 张军 | Dew point control device used in floor refrigeration system |
| US20150237766A1 (en) * | 2011-12-01 | 2015-08-20 | (State Grid Corporation Of China) | Closed Circulating Water Cooling Apparatus and Method |
| KR20140076699A (en) * | 2012-12-13 | 2014-06-23 | 현대모비스 주식회사 | THERMAL MANAGEMENT SYSTEM FOR FUEL CELL STACK and CONTROL METHOD FOR THE SAME |
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