CN102566623A - Control system of direct current power transmission converter valve pure water cooling device - Google Patents
Control system of direct current power transmission converter valve pure water cooling device Download PDFInfo
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Abstract
The invention discloses a control system of a direct current power transmission converter valve pure water cooling device. The control system comprises a power system and a control subsystem, wherein the power system comprises a master circulating pump, a water replenishing pump, electric heaters, a fan and a double-power switching device; the main circulating pump is electrified through a soft start device; the fan is electrified through a double-power switching system; the electric heaters are divided into two groups which are connected with two paths of alternating current power sources through breakers respectively; the water replenishing pump is connected with the two paths of alternating current power sources through the double-power switching device; and the control subsystem is used for controlling the main circulating pump, the water replenishing pump, the electric heaters and the fan. According to the control system of the direct current power transmission converter valve pure water cooling device provided by the invention, the electric heaters of which one is used and the other one stands by, an electric butterfly valve and an air supply electromagnetic valve are separately electrified by the two paths of alternating current power sources respectively, so that the situation that all the equipment are powered off and cannot logically and normally operate when the double-power switching device fails can be effectively prevented.
Description
Technical field
The present invention relates to the control system of large power power electronic appliance cooling device, particularly a kind of direct-current transmission converter valve control system of pure water cooling device.
Background technology
Cooling system concerns the safe operation and the serviceable life of the device that is cooled in the large power power electronic appliance operational system, and support equipment is very important.
Chinese patent CN101634866A discloses a kind of control system of pure water cooling device of high voltage direct current (HVDC) transmission converter valve, and the control method of electric heater adopts many configuration set mode, step control in the said cooling device.PLC calculates electric heater group number automatically and puts into operation according to when the advance valve temperature, is lower than and starts when setting limit value advancing the valve temperature, and into the valve temperature is low excessively causes thyristor valve body to damage to avoid; When advancing the valve temperature and being near or below valve Room dew point, the electric heater force start.The startup of electric heater and main circulation pump operation and cooling water flow are set the limit value interlocking, and electric heater was forbidden operation when main circulation pump stoppage in transit or cooling water flow were lower than the setting limit value.The described control system of Chinese patent CN101634866A all power-equipments except that main circulation pump are all given through double-power supply switching device; When double-power supply switching device breaks down can not normally switch the time, all the using and the reserved equipment all run out of steam power supply can not be by logical action.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of direct-current transmission converter valve control system of pure water cooling device is provided.
A kind of direct-current transmission converter valve control system of pure water cooling device; Said direct-current transmission converter valve control system of pure water cooling device comprises power system, RACS; Said power system comprises main circulation pump, small pump, electric heater, blower fan and double-power supply switching device; Said main circulation pump is through giving electricity through Chinese invention patent 201110300790.1 said soft starting devices, and said blower fan is given electricity through Chinese invention patent 201110359234.1 said dual power supply switched systems, and said electric heater is divided into two groups and inserts two-way ac power power supply through isolating switch respectively; Said small pump inserts two-way ac power power supply through double-power supply switching device
Said RACS comprises the control of main circulation pump, small pump, electric heater and blower fan; The startup of said RACS control main circulation pump, stop, switching; Simultaneously according to actual conditions output early warning and trip signal; The startup of said RACS control electric heater, stop,, the startup of said RACS control blower fan, stop, starting and stop quantity, reach frequency control by turns simultaneously according to actual conditions output early warning and trip signal.
In order better to realize the present invention; Said small pump starts automatically, and when the expansion drum liquid level dropped to the automatic water supplement liquid level, small pump started; When the arrival of expansion drum liquid level stops the small pump liquid level; Small pump stops, and when the expansion drum liquid level can be carried out manual moisturizing when stopping the small pump liquid level, forces to stop small pump when former water pot liquid level is low reports to the police when the former water pot liquid level that the water source is provided to expansion drum arrives;
The startup of said electric heater is advanced the valve temperature through chilled water and is controlled, and when chilled water advanced the valve temperature and starts design temperature less than electric heater, electric heater started, and chilled water advances the valve temperature when stopping design temperature greater than electric heater, and electric heater stops; Electric heater was forbidden operation when main circulation pump stoppage in transit or cooling water flow were lower than the setting limit value; Not fashionable when the isolating switch that is connected with electric heater, quote the electric heater fault, after the electric heater continuous working is greater than electrical heating failure setting-up time, when still existing to advance the valve temperature low, quote the electric heater failure;
The startup of said blower fan is controlled through design temperature, when chilled water advances the valve temperature and is higher than design temperature, and fan starting; The rotating speed of said blower fan advances the valve temperature through design temperature and current chilled water to be controlled, and PLC advances the deviation of valve temperature and design temperature according to current chilled water, carries out the PID computing; The output analog signals is given frequency converter; Frequency converter is according to the increase of this signal or reduce to come raising frequency or frequency reducing, and the control rotation speed of fan is after the blower fan frequency is reduced to the minimum operation frequency; Chilled water advances the valve temperature and still is lower than design temperature, and blower fan continues behind operation 10～20s all out of service with low-limit frequency.
In order to realize that better the present invention, said power system also comprise the electricity of giving of two electric T-shaped valves, two electric T-shaped valves are given through double-power supply switching device respectively.
In order to realize that better the present invention, said power system also comprise the electricity of giving of two electric butterfly valves, two electric butterfly valves directly insert two-way ac power power supply respectively.
In order better to realize the present invention; Said power system also comprises giving of exhaust solenoid valve, AVSV Air Vent Solenoid Valve and two tonifying Qi solenoid valves; Exhaust solenoid valve and AVSV Air Vent Solenoid Valve are given electricity through double-power supply switching device, and two tonifying Qi solenoid valves directly insert two-way ac power power supply respectively.
In order better to realize the present invention; Said RACS comprises the control of two electric T-shaped valves and two electric butterfly valves; Said two electric T-shaped valves are controlled through temperature; When temperature surpasses electric three passes opening of valves design temperature, two electric T-shaped valve standard-sized sheets, current dispel the heat through the outdoor air heating radiator; Close design temperature when temperature is lower than electric T-shaped valve, two electric T-shaped valve complete shut-downs, current are through the outdoor air heating radiator, avoid that into the valve water temperature is too low;
Said two electric butterfly valves adopt the one open-one close control mode, open when spacing when one of them electric butterfly valve, and another electric butterfly valve opens to spacing automatically, opens less than spacing electric butterfly valve and closes; When one of them electric butterfly valve is opened, during with electric T-shaped valve fault that this electric butterfly valve is connected, another electric butterfly valve opens to spacing automatically, closes with the electric butterfly valve that the fault electric T-shaped valve is connected;
When electric T-shaped valve or electro-magnetic valve need be opened, open less than spacing and close less than spacing Times fault maybe need close the time.
In order better to realize the present invention, said two electric T-shaped valves open and close synchronously, and it opens and closes and all adopts pulse mode.
In order better to realize the present invention; Said RACS also comprises the control of exhaust solenoid valve, AVSV Air Vent Solenoid Valve and the using and the reserved tonifying Qi solenoid valve; When expansion drum pressure was opened setting value greater than exhaust solenoid valve, exhaust solenoid valve was opened, and exhaust begins; When expansion drum pressure arrival exhaust solenoid valve was closed setting value, exhaust stopped;
When providing the raw water pump at water source to start when small pump or to former water pot, AVSV Air Vent Solenoid Valve is opened;
When expansion drum pressure was opened setting value less than the tonifying Qi solenoid valve, the tonifying Qi solenoid valve was opened, and when expansion drum pressure arrived tonifying Qi closed electromagnetic valve setting value, the tonifying Qi solenoid valve stopped; When the tonifying Qi solenoid valve continuous tonifying Qi time greater than tonifying Qi solenoid valve failure setting-up time, still during no show tonifying Qi closed electromagnetic valve setting value, the newspaper fault switches to subsequent use tonifying Qi solenoid valve to expansion drum pressure; When cooling system was revealed warning, the tonifying Qi solenoid valve was forced to stop.
The present invention compared with prior art has following advantage and beneficial effect:
(1) a kind of direct-current transmission converter valve control system of pure water cooling device according to the invention, blower fan adopt the dual power supply switched system to divide into groups to supply power, and can prevent that all blower fans from hanging on the same power source bus; (2) the main circulation pump problems such as to switch the water water hammer effect big, and dash current is big that adopt soft starting device well to solve full-voltage starting device main circulation pump; (3) electric heater of the using and the reserved, electric butterfly valve, tonifying Qi solenoid valve are separately given electricity respectively by two-way ac power power supply, in the time of can effectively preventing the double-power supply switching device fault, and whole dead electricity of the said equipment and can not be by the logic regular event.
Description of drawings
Fig. 1 is the said direct-current transmission converter valve pure water cooler of a specific embodiment of the invention system diagram;
Fig. 2 is that the said direct-current transmission converter valve control system of pure water cooling device of specific embodiment of the invention power system connects synoptic diagram;
Fig. 3 is the said direct-current transmission converter valve control system of pure water cooling device of a specific embodiment of the invention main circulation pump operation synoptic diagram;
Main circulation pump operation synoptic diagram when Fig. 4 is the said direct-current transmission converter valve control system of pure water cooling device of specific embodiment of the invention main circulation pump handoff failure;
Fig. 5 is the said direct-current transmission converter valve control system of pure water cooling device of a specific embodiment of the invention blower fan control principle block diagram.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present invention is described in further detail, but embodiment of the present invention is not limited thereto.
Certain direct-current transmission converter valve pure water cooler system diagram is as shown in Figure 1, and its control system comprises power system, RACS,
Said power system comprises main circulation pump P01 and P02, small pump, electric heater H01 and H02, blower fan and the double-power supply switching device of the using and the reserved; Said main circulation pump P01 and P02 give through the said soft starting device of Chinese invention patent 201110300790.1 embodiments; Said blower fan is given through the said dual power supply switched system of Chinese invention patent 201110359234.1 embodiments; Said electric heater H01 and H02 insert two-way ac power power supply through isolating switch respectively; Said small pump inserts two-way ac power power supply through double-power supply switching device; Power system also comprises giving of two electric T-shaped valve K01 and K02, two electric butterfly valve V01 and V02, tonifying Qi solenoid valve V03, V04, exhaust solenoid valve V05 and AVSV Air Vent Solenoid Valve V06; K01 and K02 insert two-way ac power power supply through double-power supply switching device respectively; V01, V02, V03 and V04 directly insert two-way ac power power supply, and V05 and V06 insert two-way ac power power supply through double-power supply switching device, and it is as shown in Figure 2 that power system connects synoptic diagram.
RACS comprises the control of main circulation pump, small pump, electric heater, blower fan, electric T-shaped valve, electric butterfly valve, tonifying Qi solenoid valve and exhaust solenoid valve.
The control of (1) two main circulation pump
Operate to example with the P01 main circulation pump, the continuous failure-free operation of P01 main circulation pump is after 168 hours, starts main circulation pump automatic switchover logic, and the P02 main pump puts simultaneously that the P01 main pump stops into operation, and main circulation pump operation synoptic diagram is as shown in Figure 3.
P01 main circulation pump operation continuously need automatically switch to the stand-by pump operation after 168 hours; When control system switches to stand-by pump operation failure; When detecting " the main pump discharge pressure is low " warning, return and switch to former operation main pump operation, main circulation pump operation synoptic diagram is as shown in Figure 4 during handoff failure.
(2) control of electric heater H01 and H02
When chilled water entered valve temperature＜14 ℃, electric heater H01 started; When chilled water entered valve temperature＞16 ℃, electric heater H01 stopped; When chilled water entered valve temperature＜15 ℃, electric heater H02 started; When chilled water entered valve temperature＞17 ℃, electric heater H02 stopped; When chilled water advances the valve temperature and is lower than 1 ℃ of valve Room dew point, 2 electric heater force starts; Electric heater was forbidden operation when main circulation pump stoppage in transit or cooling water flow were lower than the setting limit value; Not fashionable when the isolating switch that is connected with electric heater H01, quote " the cold H01 electric heater of valve fault "; Not fashionable when the isolating switch that is connected with electric heater H02, quote " the cold H02 electric heater of valve fault "; When after the electric heater continuous working 60 minutes, still having " it is low to advance the valve temperature " or " advance the valve temperature and be lower than dew point ", quote " the cold electrical heating of valve fail-please be checked " fault.
(3) control of blower fan
Air radiator is totally 3 covers, and 12 typhoon machines are divided into 3 groups; Every group 4, utilize the running frequency of Frequency Converter Control blower fan, control system is according to advancing valve temperature 4～20mA linear signal; The rotating speed of cooling blower and start and stop quantity are carried out PID regulate, guarantee that temperature steadily regulates.
The startup of blower fan is controlled through design temperature, when chilled water advances the valve temperature and is higher than design temperature, and fan starting; The rotating speed of blower fan advances the valve temperature through design temperature and current chilled water to be controlled, and PLC advances the deviation of valve temperature and design temperature according to current chilled water, carry out the PID computing after; The output analog signals is given frequency converter, and frequency converter is according to the increase of this signal or reduce to come raising frequency or frequency reducing, the control rotation speed of fan; Thereby change the system radiating amount; Make chilled water advance the valve temperature and approach near design temperature and finally being stabilized in the design temperature gradually, reach the purpose that accurate control chilled water advances the valve temperature, after the blower fan frequency is reduced to the minimum operation frequency; Advance the valve temperature like chilled water and still be lower than the target setting temperature, blower fan continues behind the operation 20s all out of service with low-limit frequency.The control principle block diagram is as shown in Figure 5.
Each organizes the different start-up temperature of blower fan setting, adopts to open earlier earlier and stops, takes turns the mode that changes jobs, and to guarantee the average abrasion of equipment, also prevents because certain equipment damages because of long-term leaving unused.
(4) control of small pump
Can realize automatic water supplement control when the valve cooling system moves automatically, when the expansion drum liquid level dropped to the automatic water supplement liquid level, small pump started, and when the arrival of expansion drum liquid level stopped the small pump liquid level, small pump stopped.As: the moisturizing liquid level is set to 350mm; When the termination of pumping liquid level was set to 450mm, small pump started when the expansion drum liquid level drops to 350mm, and small pump stops when adding to 500mm; When former water pot liquid level arrived the setting liquid level, system can force to stop small pump during automatic water supplement.
During automatic water supplement, when the pressure that expansion drum pressure causes because of the rising of liquid level increased, system can carry out exhaust automatically according to the size of expansion drum pressure.If exhaust failure causes the high warning of pressure, should carry out manual exhaust.
The valve cooling system can carry out manual moisturizing in the expansion drum liquid level less than stopping the moisturizing liquid level, when former water pot liquid level arrives the setting liquid level, can force to stop small pump.
(5) control of electric T-shaped valve and electric butterfly valve
The switching of electric T-shaped valve is to control through the temperature working range of electric T-shaped valve, and its switching mode is a pulsed.When cooling water temperature surpasses 28 ℃ of design temperatures, the electric T-shaped valve standard-sized sheet, current dispel the heat through the outdoor air heating radiator; When cooling water temperature was lower than 23 ℃ of design temperatures, electric T-shaped valve complete shut-down, current be through the outdoor air heating radiator, avoids that into the valve water temperature is too low.Electric T-shaped valve K01 and K02 adopt synchro control, just two valve synchro switches.
Two electric butterfly valves adopt the one open-one close control mode, and when V01 opened, V02 should be in and close; When V01 closed, V02 should be in unlatching; When V01 opens less than in limited time, V02 opens to spacing automatically, and V01 closes; When V02 opens less than in limited time, V01 opens to spacing automatically, and V02 closes; When V01 opens, K01 electric T-shaped valve fault, V02 opens to spacing automatically, and V01 closes; When V02 opens, K02 electric T-shaped valve fault, V01 opens to spacing automatically, and V02 closes.
As electric T-shaped valve K01 and K02, electric butterfly valve V01 and V02 leave in the time of need opening less than spacing and close less than spacing newspaper fault maybe need close the time.
(6) control of tonifying Qi solenoid valve, exhaust solenoid valve and AVSV Air Vent Solenoid Valve
The tonifying Qi loop is provided with two covers, and by tonifying Qi solenoid valve V03 and tonifying Qi solenoid valve V04 control, when expansion drum pressure was lower than 1.6bar, the tonifying Qi solenoid valve was opened respectively, and tonifying Qi begins, and when expansion drum pressure arrived 1.8bar, tonifying Qi stopped; When the continuous tonifying Qi of tonifying Qi solenoid valve after 40 minutes, expansion drum pressure still during no show 1.8bar, is quoted the tonifying Qi solenoid valve failure, switches to another tonifying Qi solenoid valve and opens; When valve cooling system leakage alarm, the tonifying Qi solenoid valve is forced to stop.
The exhaust loop is provided with exhaust solenoid valve V05, and when expansion drum pressure was higher than 2.2bar, exhaust solenoid valve V05 opened exhaust, and when expansion drum pressure arrived 2.0bar, exhaust stopped.
The moisturizing loop is provided with AVSV Air Vent Solenoid Valve V06, and when providing the raw water pump at water source to start when small pump or to former water pot, AVSV Air Vent Solenoid Valve V06 opens.
The foregoing description is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. direct-current transmission converter valve control system of pure water cooling device; Said direct-current transmission converter valve control system of pure water cooling device comprises power system, RACS; It is characterized in that: said power system comprises main circulation pump, small pump, electric heater, blower fan and double-power supply switching device; Said main circulation pump is given electricity through soft starting device, and said blower fan is given electricity through the dual power supply switched system, and said electric heater is divided into two groups and inserts two-way ac power power supply through isolating switch respectively; Said small pump inserts two-way ac power power supply through double-power supply switching device
Said RACS comprises the control of main circulation pump, small pump, electric heater and blower fan; The startup of said RACS control main circulation pump, stop, switching; Simultaneously according to actual conditions output early warning and trip signal; The startup of said RACS control electric heater, stop,, the startup of said RACS control blower fan, stop, starting and stop quantity, reach frequency control by turns simultaneously according to actual conditions output early warning and trip signal.
2. according to the said a kind of direct-current transmission converter valve control system of pure water cooling device of claim 1; It is characterized in that: said small pump starts automatically, and when the expansion drum liquid level dropped to the automatic water supplement liquid level, small pump started; When the arrival of expansion drum liquid level stops the small pump liquid level; Small pump stops, and when the expansion drum liquid level can be carried out manual moisturizing when stopping the small pump liquid level, forces to stop small pump when former water pot liquid level is low reports to the police when the former water pot liquid level that the water source is provided to expansion drum arrives;
The startup of said electric heater is advanced the valve temperature through chilled water and is controlled, and when chilled water advanced the valve temperature and starts design temperature less than electric heater, electric heater started, and chilled water advances the valve temperature when stopping design temperature greater than electric heater, and electric heater stops; Electric heater was forbidden operation when main circulation pump stoppage in transit or cooling water flow were lower than the setting limit value; Not fashionable when the isolating switch that is connected with electric heater, quote the electric heater fault, after the electric heater continuous working is greater than electrical heating failure setting-up time, when still existing to advance the valve temperature low, quote the electric heater failure;
The startup of said blower fan is controlled through design temperature, when chilled water advances the valve temperature and is higher than design temperature, and fan starting; The rotating speed of said blower fan advances the valve temperature through design temperature and current chilled water to be controlled, and PLC advances the deviation of valve temperature and design temperature according to current chilled water, carries out the PID computing; The output analog signals is given frequency converter; Frequency converter is according to the increase of this signal or reduce to come raising frequency or frequency reducing, and the control rotation speed of fan is after the blower fan frequency is reduced to the minimum operation frequency; Chilled water advances the valve temperature and still is lower than design temperature, and blower fan continues behind operation 10～20s all out of service with low-limit frequency.
3. according to the said a kind of direct-current transmission converter valve control system of pure water cooling device of claim 1, it is characterized in that: said power system also comprises the electricity of giving of two electric T-shaped valves, and two electric T-shaped valves are given through double-power supply switching device respectively.
4. according to the said a kind of direct-current transmission converter valve control system of pure water cooling device of claim 1, it is characterized in that: said power system also comprises the electricity of giving of two electric butterfly valves, and two electric butterfly valves directly insert two-way ac power power supply respectively.
5. according to the said a kind of direct-current transmission converter valve control system of pure water cooling device of claim 1; It is characterized in that: said power system also comprises giving of exhaust solenoid valve, AVSV Air Vent Solenoid Valve and two tonifying Qi solenoid valves; Exhaust solenoid valve and AVSV Air Vent Solenoid Valve are given electricity through double-power supply switching device, and two tonifying Qi solenoid valves directly insert two-way ac power power supply respectively.
6. according to the said a kind of direct-current transmission converter valve control system of pure water cooling device of claim 1; It is characterized in that: said RACS comprises the control of two electric T-shaped valves and two electric butterfly valves; Said two electric T-shaped valves are controlled through temperature; When temperature surpasses electric three passes opening of valves design temperature, two electric T-shaped valve standard-sized sheets, current dispel the heat through the outdoor air heating radiator; Close design temperature when temperature is lower than electric T-shaped valve, two electric T-shaped valve complete shut-downs, current are through the outdoor air heating radiator, avoid that into the valve water temperature is too low;
Said two electric butterfly valves adopt the one open-one close control mode, open when spacing when one of them electric butterfly valve, and another electric butterfly valve opens to spacing automatically, opens less than spacing electric butterfly valve and closes; When one of them electric butterfly valve is opened, during with electric T-shaped valve fault that this electric butterfly valve is connected, another electric butterfly valve opens to spacing automatically, closes with the electric butterfly valve that the fault electric T-shaped valve is connected;
When electric T-shaped valve or electro-magnetic valve need be opened, open less than spacing and close less than spacing Times fault maybe need close the time.
7. according to the said a kind of direct-current transmission converter valve control system of pure water cooling device of claim 6, it is characterized in that: said two electric T-shaped valves open and close synchronously, and it opens and closes and all adopts pulse mode.
8. according to the said a kind of direct-current transmission converter valve control system of pure water cooling device of claim 1; It is characterized in that: said RACS also comprises the control of exhaust solenoid valve, AVSV Air Vent Solenoid Valve and the using and the reserved tonifying Qi solenoid valve; When expansion drum pressure was opened setting value greater than exhaust solenoid valve, exhaust solenoid valve was opened, and exhaust begins; When expansion drum pressure arrival exhaust solenoid valve was closed setting value, exhaust stopped;
When providing the raw water pump at water source to start when small pump or to former water pot, AVSV Air Vent Solenoid Valve is opened;
When expansion drum pressure was opened setting value less than the tonifying Qi solenoid valve, the tonifying Qi solenoid valve was opened, and when expansion drum pressure arrived tonifying Qi closed electromagnetic valve setting value, the tonifying Qi solenoid valve stopped; When the tonifying Qi solenoid valve continuous tonifying Qi time greater than tonifying Qi solenoid valve failure setting-up time, still during no show tonifying Qi closed electromagnetic valve setting value, the newspaper fault switches to subsequent use tonifying Qi solenoid valve to expansion drum pressure; When cooling system was revealed warning, the tonifying Qi solenoid valve was forced to stop.
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| CN103018067A (en) * | 2012-12-05 | 2013-04-03 | 广州高澜节能技术股份有限公司 | Test system for cooling converter valve device |
| CN103353773B (en) * | 2013-07-18 | 2018-05-11 | 北京国电富通科技发展有限责任公司 | A kind of adjusting method and system of converter valve water-cooling system cooling water temperature |
| CN103353773A (en) * | 2013-07-18 | 2013-10-16 | 北京国电富通科技发展有限责任公司 | Adjusting method of converter valve water cooling system cooling water temperature and system thereof |
| CN103760882A (en) * | 2013-11-06 | 2014-04-30 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Complete redundancy testing apparatus control system of direct-current valve cooling unit |
| CN104377938B (en) * | 2014-12-01 | 2017-09-26 | 南阳防爆集团电气***工程有限公司 | A kind of frequency converter cooling system |
| CN104377938A (en) * | 2014-12-01 | 2015-02-25 | 南阳防爆集团电气***工程有限公司 | Converter cooling system |
| CN105739550A (en) * | 2016-03-28 | 2016-07-06 | 广州高澜节能技术股份有限公司 | Automatic water supplement system of high-voltage DC power transmission converter valve water cooling system |
| CN106253220A (en) * | 2016-08-12 | 2016-12-21 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of converter valve cooling system inner cold water enters valve temperature height guard method |
| CN106253220B (en) * | 2016-08-12 | 2017-11-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of converter valve cooling system inner cold water enters the high guard method of valve temperature |
| WO2018028114A1 (en) * | 2016-08-12 | 2018-02-15 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Inner cold water entrance valve temperature high protection method for valve cooling system of converter valve |
| CN106368971A (en) * | 2016-08-18 | 2017-02-01 | 常州博瑞电力自动化设备有限公司 | Automatic control method of cooling capacity of outer cooling unit |
| CN106368971B (en) * | 2016-08-18 | 2018-10-19 | 常州博瑞电力自动化设备有限公司 | The autocontrol method of outer cold wind unit cooling capacity |
| CN107787162A (en) * | 2016-08-31 | 2018-03-09 | 江苏海鼎电气科技有限公司 | Using the cooling back installation and its application method of pure water medium |
| CN107787162B (en) * | 2016-08-31 | 2023-09-12 | 江苏海鼎电气科技有限公司 | Circulation cooling device adopting pure water medium and application method thereof |
| CN109739273A (en) * | 2019-01-07 | 2019-05-10 | 阜阳华润电力有限公司 | Power plant's water system and power plant's water system control method |
| CN109739273B (en) * | 2019-01-07 | 2021-10-12 | 阜阳华润电力有限公司 | Power plant water system and power plant water system control method |
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Denomination of invention: Control system of pure water cooling device for HVDC converter valve Effective date of registration: 20201103 Granted publication date: 20140820 Pledgee: Bank of China Limited Guangzhou Pearl River Branch Pledgor: GUANGZHOU GOALAND ENERGY CONSERVATION TECH Co.,Ltd. Registration number: Y2020440000348 |
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