CN102566623B - 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 control system of direct current power transmission converter valve pure.
Background technology
In large power power electronic appliance operational system, cooling system concerns safe operation and the serviceable life of the device that is cooled, 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 in described cooling device, the control method of electric heater adopts many group configuration modes, step control.PLC, according to when advance valve temperature, automatically calculates electric heater group number and puts into operation, starts when setting limit value entering valve temperature, damages avoiding into the too low thyristor valve body that causes of valve temperature; When entering valve temperature and being near or below valve Room dew point, electric heater force start.The operation of the startup of electric heater and main circulation pump and cooling water flow are set limit value interlocking, and main circulation pump is stopped transport or cooling water flow electric heater when setting limit value is forbidden operation.The all power-equipments of control system described in Chinese patent CN101634866A except main circulation pump are all given electricity by double-power supply switching device, when double-power supply switching device breaks down can not normally switch time, all the using and the reserved equipment all runs out of steam power supply can not be by logical action.
Summary of the invention
The object of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of control system of direct current power transmission converter valve pure is provided.
A kind of control system of direct current power transmission converter valve pure, described control system of direct current power transmission converter valve pure comprises power system, control subsystem, described power system comprises main circulation pump, small pump, electric heater, blower fan and double-power supply switching device, described main circulation pump is by giving electricity by soft starting device described in Chinese invention patent 201110300790.1, described blower fan is given electricity by Dual-power switching system described in Chinese invention patent 201110359234.1, described electric heater is divided into two groups and by isolating switch, accesses two-way ac power power supply respectively, described small pump accesses two-way ac power power supply by double-power supply switching device,
Described control subsystem comprises the control of main circulation pump, small pump, electric heater and blower fan, described control subsystem control main circulation pump startup, stop, switching, simultaneously according to actual conditions output early warning and trip signal, described control subsystem control electric heater startup, stop, simultaneously according to actual conditions output early warning and trip signal, described control subsystem control blower fan startup, stop, starting and stop quantity, rotation and frequency control.
In order better to realize the present invention, described small pump starts automatically, when expansion drum liquid level drops to automatic water supplement liquid level, small pump starts, when the arrival of expansion drum liquid level stops small pump liquid level, small pump stops, and when expansion drum liquid level is less than while stopping small pump liquid level, can carry out manual moisturizing, forces to stop small pump when providing the former water pot liquid level at water source to arrive the low warning of former water pot liquid level to expansion drum;
The startup of described electric heater is entered valve temperature by chilled water and is controlled, and when chilled water enters valve temperature and is less than electric heater and starts design temperature, electric heater starts, and when chilled water enters valve temperature and is greater than electric heater and stops design temperature, electric heater stops; Main circulation pump is stopped transport or cooling water flow electric heater when setting limit value is forbidden operation; When the isolating switch being connected with electric heater does not close, quote electric heater fault, when electric heater continuous working is greater than after electrical heating failure setting-up time, still exist when low into valve temperature, quote electric heater failure;
The startup of described blower fan is controlled by design temperature, when chilled water enters valve temperature higher than design temperature, and fan starting; The rotating speed of described blower fan enters valve temperature by design temperature and current chilled water and controls, PLC enters the deviation of valve temperature and design temperature according to current chilled water, carry out PID computing, output analog signals is to frequency converter, frequency converter is according to the increase of this signal or reduce to come raising frequency or frequency reducing, controls rotation speed of fan, when blower fan frequency is down to after minimum operation frequency, chilled water enters valve temperature still lower than design temperature, and blower fan continues after operation 10～20s all out of service with low-limit frequency.
In order better to realize the present invention, described power system also comprises the electricity of giving of two electric T-shaped valves, and two electric T-shaped valves are given respectively electric by double-power supply switching device.
In order better to realize the present invention, described power system also comprises the electricity of giving of two electric butterfly valves, and two electric butterfly valves directly access respectively two-way ac power power supply.
In order better to realize the present invention, described power system also comprises the electricity of 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 by double-power supply switching device, and two tonifying Qi solenoid valves directly access respectively two-way ac power power supply.
In order better to realize the present invention, described control subsystem comprises the control of two electric T-shaped valves and two electric butterfly valves, described two electric T-shaped valves are controlled by temperature, when surpassing electric T-shaped valve, temperature opens design temperature, two electric T-shaped valve standard-sized sheets, current dispel the heat by outdoor air heating radiator; When temperature is closed design temperature lower than electric T-shaped valve, two electric T-shaped valve complete shut-downs, current, by outdoor air heating radiator, do not avoid too low into valve water temperature;
Described two electric butterfly valves adopt one open-one close control mode, when one of them electric butterfly valve, open when spacing, 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 unlatching, during the electric T-shaped valve fault being connected with this electric butterfly valve, another electric butterfly valve opens to spacing automatically, closes with the electric butterfly valve that fault electric T-shaped valve is connected;
When electric T-shaped valve or electro-magnetic valve need to be opened, open less than spacing and close less than spacing Times fault while maybe needing to close.
In order better to realize the present invention, described two electric T-shaped valve synchronous opening/closings, it opens and closes and all adopts pulse mode.
In order better to realize the present invention, described control subsystem 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 is greater than exhaust solenoid valve unlatching setting value, exhaust solenoid valve is opened, exhaust starts, when expansion drum pressure arrival exhaust solenoid valve is closed setting value, exhaust stops;
While 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 is less than tonifying Qi solenoid valve unlatching setting value, tonifying Qi solenoid valve is opened, and when expansion drum pressure arrives tonifying Qi closed electromagnetic valve setting value, tonifying Qi solenoid valve stops; When the tonifying Qi solenoid valve continuous tonifying Qi time, be greater than tonifying Qi solenoid valve failure setting-up time, when expansion drum pressure does not arrive tonifying Qi closed electromagnetic valve setting value yet, report fault, switches to standby tonifying Qi solenoid valve; When cooling system is revealed warning, tonifying Qi solenoid valve is forced to stop.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention:
(1) a kind of control system of direct current power transmission converter valve pure of the present invention, blower fan adopts Dual-power switching system grouping power supply, can prevent that all blower fans from hanging on same power source bus; (2) the main circulation pump problems such as to switch water water hammer effect large, and dash current is large 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 is separately given respectively electricity by two-way ac power power supply, in the time of can effectively preventing double-power supply switching device fault, whole dead electricity of the said equipment and can not be by logic regular event.
Accompanying drawing explanation
Fig. 1 is direct-current transmission converter valve pure water cooler system diagram described in the specific embodiment of the invention;
Fig. 2 is control system of direct current power transmission converter valve pure power system connection diagram described in the specific embodiment of the invention;
Fig. 3 is control system of direct current power transmission converter valve pure main circulation pump operation schematic diagram described in the specific embodiment of the invention;
Fig. 4 is main circulation pump operation schematic diagram during control system of direct current power transmission converter valve pure main circulation pump handoff failure described in the specific embodiment of the invention;
Fig. 5 is control system of direct current power transmission converter valve pure air-blower control theory diagram described in the specific embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described in further detail, but embodiments of the present invention are not limited to this.
As shown in Figure 1, its control system comprises power system, control subsystem to certain direct-current transmission converter valve pure water cooler system diagram,
Described power system comprises main circulation pump P01 and the P02 of the using and the reserved, small pump, electric heater H01 and H02, blower fan and double-power supply switching device, described main circulation pump P01 and P02 give electricity by soft starting device described in Chinese invention patent 201110300790.1 embodiments, described blower fan is given electricity by Dual-power switching system described in Chinese invention patent 201110359234.1 embodiments, described electric heater H01 and H02 access two-way ac power power supply by isolating switch respectively, described small pump accesses two-way ac power power supply by double-power supply switching device, power system also comprises two electric T-shaped valve K01 and K02, two electric butterfly valve V01 and V02, tonifying Qi solenoid valve V03, V04, giving of exhaust solenoid valve V05 and AVSV Air Vent Solenoid Valve V06 is electric, K01 and K02 access two-way ac power power supply by double-power supply switching device respectively, V01, V02, V03 and V04 directly access two-way ac power power supply, V05 and V06 access two-way ac power power supply by double-power supply switching device, power system connection diagram as shown in Figure 2.
Control subsystem 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
With P01 main circulation pump, operate to example, 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 P01 main pump simultaneously that puts into operation stops, and main circulation pump operation schematic diagram as shown in Figure 3.
P01 main circulation pump continuously operation needs to automatically switch to stand-by pump operation after 168 hours, when switching to stand-by pump, control system moves unsuccessfully, while detecting " main pump discharge pressure is low " warning, switchback is to former operation main pump operation, and during handoff failure, main circulation pump operation schematic diagram as shown in Figure 4.
(2) control of electric heater H01 and H02
When chilled water enters 14 ℃ of valve temperature <, electric heater H01 starts; When chilled water enters 16 ℃ of valve temperature >, electric heater H01 stops; When chilled water enters 15 ℃ of valve temperature <, electric heater H02 starts; When chilled water enters 17 ℃ of valve temperature >, electric heater H02 stops; When chilled water enters valve temperature lower than 1 ℃ of valve Room dew point, 2 electric heater force starts; Main circulation pump is stopped transport or cooling water flow electric heater when setting limit value is forbidden operation; When the isolating switch being connected with electric heater H01 does not close, quote " the cold H01 electric heater of valve fault "; When the isolating switch being connected with electric heater H02 does not close, quote " the cold H02 electric heater of valve fault "; While after electric heater continuous working 60 minutes, still there is " entering valve temperature low " or " entering valve temperature lower than dew point ", quote " the cold electrical heating failure of valve-please check " fault.
(3) control of blower fan
Air radiator is totally 3 covers, and 12 Fans, are divided into 3 groups, every group 4, utilize the running frequency of Frequency Converter Control blower fan, control system is according to entering valve temperature 4～20mA linear signal, the rotating speed of cooling blower and start and stop quantity are carried out to PID adjusting, guarantee that temperature steadily regulates.
The startup of blower fan is controlled by design temperature, when chilled water enters valve temperature higher than design temperature, fan starting, the rotating speed of blower fan enters valve temperature by design temperature and current chilled water and controls, PLC enters the deviation of valve temperature and design temperature according to current chilled water, carry out after PID computing, output analog signals is to frequency converter, frequency converter is according to the increase of this signal or reduce to come raising frequency or frequency reducing, control rotation speed of fan, thereby change system radiating amount, making chilled water enter valve temperature approaches gradually design temperature and is finally stabilized near design temperature, reach the object that accurate control chilled water enters valve temperature, when blower fan frequency is down to after minimum operation frequency, as chilled water enters valve temperature still lower than target setting temperature, blower fan continues after operation 20s all out of service with low-limit frequency.Control principle block diagram as shown in Figure 5.
Each is organized blower fan and sets different start-up temperature, adopts first to open first to stop, take turns the mode changing jobs, and to guarantee the average abrasion of equipment, also prevents because certain equipment is because of long-term idle damage.
(4) control of small pump
When valve cooling system moves automatically, can realize automatic water supplement and control, when expansion drum liquid level drops to automatic water supplement liquid level, small pump starts, and when the arrival of expansion drum liquid level stops small pump liquid level, small pump stops.As: moisturizing liquid level is set to 350mm, when termination of pumping liquid level is set to 450mm, when expansion drum liquid level drops to 350mm, small pump starts, and while adding to 500mm, small pump stops, during automatic water supplement, when former water pot liquid level arrives setting liquid level, system can force to stop small pump.
During automatic water supplement, when the pressure that expansion drum pressure causes because of the rising of liquid level increases, system can be carried out exhaust automatically according to the size of expansion drum pressure.If there is exhaust failure, cause the high warning of pressure, should carry out manual exhaust.
Valve cooling system is less than and stops moisturizing liquid level and can carry out manual moisturizing in expansion drum liquid level, when former water pot liquid level arrives, can force to stop small pump while setting liquid level.
(5) control of electric T-shaped valve and electric butterfly valve
The switching of electric T-shaped valve is to control by the temperature working range of electric T-shaped valve, and its switching mode is pulsed.When cooling water temperature surpasses 28 ℃ of design temperatures, electric T-shaped valve standard-sized sheet, current dispel the heat by outdoor air heating radiator; When cooling water temperature is during lower than 23 ℃ of design temperatures, electric T-shaped valve complete shut-down, current, by outdoor air heating radiator, do not avoid too low into valve water temperature.Electric T-shaped valve K01 and K02 adopt synchro control, namely two valve synchro switches.
Two electric butterfly valves adopt one open-one close control mode, and when V01 opens, V02 should be in closing; When V01 closes, V02 should be in opening; 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 to opening less than spacing and close less than spacing report fault while maybe needing to close.
(6) control of tonifying Qi solenoid valve, exhaust solenoid valve and AVSV Air Vent Solenoid Valve
Tonifying Qi loop arranges two covers, is controlled respectively by tonifying Qi solenoid valve V03 and tonifying Qi solenoid valve V04, and when expansion drum pressure is during lower than 1.6bar, tonifying Qi solenoid valve is opened, and tonifying Qi starts, and when expansion drum pressure arrives 1.8bar, tonifying Qi stops; When the continuous tonifying Qi of tonifying Qi solenoid valve is after 40 minutes, when expansion drum pressure does not arrive 1.8bar yet, quote tonifying Qi solenoid valve failure, switch to another tonifying Qi solenoid valve and open; When valve cooling system leakage alarm, tonifying Qi solenoid valve is forced to stop.
Exhausting loop arranges exhaust solenoid valve V05, and when expansion drum pressure is during higher than 2.2bar, exhaust solenoid valve V05 opens exhaust, and when expansion drum pressure arrives 2.0bar, exhaust stops.
Moisturizing loop arranges AVSV Air Vent Solenoid Valve V06, and while 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.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (5)
1. a control system of direct current power transmission converter valve pure, described control system of direct current power transmission converter valve pure comprises power system, control subsystem, it is characterized in that: described power system comprises main circulation pump, small pump, electric heater, blower fan and double-power supply switching device, described main circulation pump is given electricity by soft starting device, described blower fan is given electricity by Dual-power switching system, described electric heater is divided into two groups and by isolating switch, accesses two-way ac power power supply respectively, described small pump accesses two-way ac power power supply by double-power supply switching device,
Described control subsystem comprises the control of main circulation pump, small pump, electric heater and blower fan, described control subsystem control main circulation pump startup, stop, switching, simultaneously according to actual conditions output early warning and trip signal, described control subsystem control electric heater startup, stop, simultaneously according to actual conditions output early warning and trip signal, described control subsystem control blower fan startup, stop, starting and stop quantity, rotation and frequency control;
Described power system also comprises the electricity of giving of two electric T-shaped valves, and two electric T-shaped valves are given respectively electric by double-power supply switching device;
Described power system also comprises the electricity of giving of two electric butterfly valves, and two electric butterfly valves directly access respectively two-way ac power power supply;
Described small pump starts automatically, when expansion drum liquid level drops to automatic water supplement liquid level, small pump starts, when the arrival of expansion drum liquid level stops small pump liquid level, small pump stops, when expansion drum liquid level is less than while stopping small pump liquid level, can carry out manual moisturizing, when providing the former water pot liquid level at water source to arrive the low warning of former water pot liquid level to expansion drum, force to stop small pump;
The startup of described electric heater is entered valve temperature by chilled water and is controlled, and when chilled water enters valve temperature and is less than electric heater and starts design temperature, electric heater starts, and when chilled water enters valve temperature and is greater than electric heater and stops design temperature, electric heater stops; Main circulation pump is stopped transport or cooling water flow electric heater when setting limit value is forbidden operation; When the isolating switch being connected with electric heater does not close, quote electric heater fault, when electric heater continuous working is greater than after electrical heating failure setting-up time, still exist when low into valve temperature, quote electric heater failure;
The startup of described blower fan is controlled by design temperature, when chilled water enters valve temperature higher than design temperature, and fan starting; The rotating speed of described blower fan enters valve temperature by design temperature and current chilled water and controls, PLC enters the deviation of valve temperature and design temperature according to current chilled water, carry out PID computing, output analog signals is to frequency converter, frequency converter is according to the increase of this signal or reduce to come raising frequency or frequency reducing, controls rotation speed of fan, when blower fan frequency is down to after minimum operation frequency, chilled water enters valve temperature still lower than design temperature, and blower fan continues after operation 10～20s all out of service with low-limit frequency.
2. a kind of control system of direct current power transmission converter valve pure according to claim 1, it is characterized in that: described power system also comprises the electricity of 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 by double-power supply switching device, and two tonifying Qi solenoid valves directly access respectively two-way ac power power supply.
3. a kind of control system of direct current power transmission converter valve pure according to claim 1, it is characterized in that: described control subsystem comprises the control of two electric T-shaped valves and two electric butterfly valves, described two electric T-shaped valves are controlled by temperature, when surpassing electric T-shaped valve, temperature opens design temperature, two electric T-shaped valve standard-sized sheets, current dispel the heat by outdoor air heating radiator; When temperature is closed design temperature lower than electric T-shaped valve, two electric T-shaped valve complete shut-downs, current, by outdoor air heating radiator, do not avoid too low into valve water temperature;
Described two electric butterfly valves adopt one open-one close control mode, when one of them electric butterfly valve, open when spacing, 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 unlatching, during the electric T-shaped valve fault being connected with this electric butterfly valve, another electric butterfly valve opens to spacing automatically, closes with the electric butterfly valve that fault electric T-shaped valve is connected;
When electric T-shaped valve or electronic dish valve need to be opened, open less than spacing and close less than spacing Times fault while maybe needing to close.
4. a kind of control system of direct current power transmission converter valve pure according to claim 3, is characterized in that: described two electric T-shaped valve synchronous opening/closings, it opens and closes and all adopts pulse mode.
5. a kind of control system of direct current power transmission converter valve pure according to claim 1, it is characterized in that: described control subsystem 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 is greater than exhaust solenoid valve unlatching setting value, exhaust solenoid valve is opened, exhaust starts, when expansion drum pressure arrival exhaust solenoid valve is closed setting value, exhaust stops;
While 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 is less than tonifying Qi solenoid valve unlatching setting value, tonifying Qi solenoid valve is opened, and when expansion drum pressure arrives tonifying Qi closed electromagnetic valve setting value, tonifying Qi solenoid valve stops; When the tonifying Qi solenoid valve continuous tonifying Qi time, be greater than tonifying Qi solenoid valve failure setting-up time, when expansion drum pressure does not arrive tonifying Qi closed electromagnetic valve setting value yet, report fault, switches to standby tonifying Qi solenoid valve; When valve cooling system is revealed warning, tonifying Qi solenoid valve is forced to stop.
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| CN201210008063.2A CN102566623B (en) | 2012-01-04 | 2012-01-04 | Control system of direct current power transmission converter valve pure water cooling device |
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| CN103018067B (en) * | 2012-12-05 | 2015-09-16 | 广州高澜节能技术股份有限公司 | converter valve device cooling test system |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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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