CN102368671B - High voltage direct current transmission valve cooling system soft starting apparatus - Google Patents
High voltage direct current transmission valve cooling system soft starting apparatus Download PDFInfo
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- CN102368671B CN102368671B CN 201110300790 CN201110300790A CN102368671B CN 102368671 B CN102368671 B CN 102368671B CN 201110300790 CN201110300790 CN 201110300790 CN 201110300790 A CN201110300790 A CN 201110300790A CN 102368671 B CN102368671 B CN 102368671B
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Abstract
The invention discloses a high voltage direct current transmission valve cooling system soft starting apparatus which comprises a power loop and a control circuit. The power loop comprises a soft starting loop and a bypass. The soft starting loop comprises a first plastic shell breaker, a soft starter and a first alternating current contactor which are connected in order. The bypass comprises a second plastic shell breaker and a second alternating current contactor which are connected in order. The control loop comprises a soft starting loop control line and a bypass control line. The soft starter is connected to a power supply through a miniature breaker, and controls start and stop of the soft starter through closing and opening an auxiliary contact point of the first alternating current contactor. According to the high voltage direct current transmission valve cooling system soft starting apparatus, problems of a large water hammer effect of full pressure starting apparatus main circulating pump switching water, large impact current and the like are solved well, and problems of abnormal impulse current generated by indetermination of a voltage phase angle, starting apparatus damage and the like when an original frequency conversion starting apparatus switches to power frequency after a main circulating pump finishes frequency conversion starting are solved.
Description
Technical field
The present invention relates to control and the protective device of the cold main circulation pump of high voltage direct current transmission valve, particularly the cold soft starting device of high voltage direct current transmission valve.
Background technology
Traditional water-cooling system main circulation pump starting drive has following shortcoming: (1) direct-on-line starting device, main circulation pump have problems such as the water of switching water hammer effect is big, and impulse current is big; (2) traditional varying frequency starting device is after main circulation pump is finished variable frequency starting, when switching to power frequency, because the unusual impulse current of the uncertain generation of voltage phase angle, damage problems such as starting drive, therefore, be necessary to develop a kind of new cold soft starting device of high voltage direct current transmission valve, adapt to the requirement of the cold main circulation pump of high voltage direct current transmission valve.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art; provide a kind of high voltage direct current transmission valve cold soft starting device; described device is exclusively used in control and the protection of high voltage direct current transmission converter valve closed pure water cooling system main circulation pump; its special structure design has higher utility for the safe operation of converter valve provides reliable assurance.
Purpose of the present invention is achieved through the following technical solutions:
The cold soft starting device of high voltage direct current transmission valve, comprise power loop and control loop, described power loop comprises soft open loop and bypass, the soft loop of opening comprises first breaker of plastic casing, soft initiator and first A.C. contactor that connects successively, bypass comprises second breaker of plastic casing and second A.C. contactor that connects successively, first breaker of plastic casing is in parallel with the second breaker of plastic casing input, be connected with electrical source of power then, first A.C. contactor is in parallel with the second A.C. contactor output, connects with thermel protection device and circulating pump then;
Described control loop comprises soft start circuit controls circuit and Bypass Control circuit, soft start circuit controls circuit and Bypass Control circuit access control power supply in parallel, described soft start circuit controls circuit comprises first breaker of plastic casing, first auxiliary contact, the contact of first relay, the coil of the contact of second relay and first A.C. contactor, described first breaker of plastic casing, first auxiliary contact, the coil of the contact of first relay and first A.C. contactor connects successively, the contact of second relay is in parallel with the contact of first relay, described Bypass Control circuit comprises second breaker of plastic casing, first auxiliary contact, the contact of the 3rd relay, the contact of the 4th relay, the coil of the contact of the 5th relay and second A.C. contactor, described second breaker of plastic casing, first auxiliary contact, the coil of the contact of the 3rd relay and second A.C. contactor connects successively, the contact of the contact of the 4th relay and the 5th relay is in parallel with the contact of the 3rd relay respectively, the contact of described first relay, the contact of second relay, the contact of the contact of the 4th relay and the 5th relay is the PLC control point;
Described soft initiator inserts electrical source of power by miniature circuit breaker, whether controls the start and stop of soft initiator by the closure of the first A.C. contactor auxiliary contact.
In order better to realize the present invention, described thermel protection device comprises thermal relay and the safety switch that connects successively.
In order better to realize the present invention, described control loop also comprises first circuit breaker deciliter control circuit, described first circuit breaker deciliter control circuit comprises first breaker of plastic casing, second auxiliary contact of connection successively and the coil of the 6th relay, and the described soft circuit controls circuit that breaks is in parallel with soft start circuit controls circuit and Bypass Control circuit.
In order better to realize the present invention, described control loop also comprises pump operating cycle indication circuit, described pump operating cycle indication circuit comprises the first A.C. contactor auxiliary contact, the second A.C. contactor auxiliary contact, the coil of indicator light and the 7th relay, the described second A.C. contactor auxiliary contact are connected with indicator light, the first A.C. contactor auxiliary contact are in parallel with the second A.C. contactor auxiliary contact, the coil of the 7th relay is in parallel with indicator light, and described pump operating cycle indication circuit is in parallel with soft start circuit controls circuit and Bypass Control circuit.
In order better to realize the present invention, described control loop also comprises the circulating pump faulty line, described circulating pump faulty line comprises coil and the thermal relay auxiliary contact of second breaker of plastic casing, second auxiliary contact, the 8th relay, connect with the coil of the 8th relay after described second breaker of plastic casing, second auxiliary contact and the parallel connection of thermal relay auxiliary contact, described circulating pump faulty line is in parallel with soft start circuit controls circuit and Bypass Control circuit.
In order better to realize the present invention, described soft initiator is connected to bypass run signal output loop, soft initiator fault-signal output loop and soft initiator run signal output loop, the coil of the 3rd relay was charged when described bypass moved, the output run signal, the coil of the 9th relay is charged during described soft initiator fault, the output fault-signal, the coil of the tenth relay was charged when described soft initiator moved, the output run signal.
In order better to realize the present invention, the cold soft starting device of described high voltage direct current transmission valve also comprises electric current and voltage display unit, and display unit one end is connected with electrical source of power by the 3rd breaker of plastic casing, and the display unit other end connects in circulating pump.
The invention has the beneficial effects as follows:
(1) the cold soft starting device of high voltage direct current transmission valve provided by the invention, problem such as well having solved direct-on-line starting device main circulation pump, to switch the water water hammer effect big, and impulse current is big;
When (2) the cold soft starting device of high voltage direct current transmission valve provided by the invention had solved former varying frequency starting device and switches to power frequency after main circulation pump is finished variable frequency starting, the unusual impulse current that produces owing to voltage phase angle is uncertain damaged problems such as starting drive;
(3) economy: the cold soft starting device of high voltage direct current transmission valve provided by the invention, realized that not only the static frequency converter speed change starts, also avoided frequency conversion switching shock electric current, this device has reduced the requirement to motor simultaneously, directly reduced cost, higher economic value has been arranged;
(4) reliability: the present invention combines the advantage of direct-on-line starting device and varying frequency starting device by effective collocation of soft initiator and power frequency contactor, has improved the reliability of water-cooling system;
(5) fail safe: soft starting device is designed to go out mode under enterprising, thereby the exposed copper bar of having avoided static frequency converter and power frequency starting drive to design has improved fail safe.
Description of drawings
The cold soft starting device power loop of the described high voltage direct current transmission valve of Fig. 1 one embodiment of the present invention circuit diagram;
The cold soft starting device control loop of the described high voltage direct current transmission valve of Fig. 2 one embodiment of the present invention circuit diagram.
Embodiment
Below in conjunction with embodiment and accompanying drawing an embodiment of the invention are described in further detail, but embodiments of the present invention are not limited thereto.
The cold soft starting device of high voltage direct current transmission valve, comprise power loop and control loop, as shown in Figure 1, described power loop comprises soft open loop and bypass, the soft loop of opening comprises first breaker of plastic casing 1 that connects successively, soft initiator 2 and first A.C. contactor 3, bypass comprises second breaker of plastic casing 4 and second A.C. contactor 5 that connects successively, first breaker of plastic casing 1 is in parallel with second breaker of plastic casing, 4 inputs, be connected with electrical source of power then, first A.C. contactor 3 is in parallel with second A.C. contactor, 5 outputs, then with thermal relay 5, safety switch 6 and circulating pump 7 series connection;
Described soft initiator inserts electrical source of power by miniature circuit breaker 8-1,8-2, and miniature circuit breaker 8-1,8-2 are redundant the settings, and whether the using and the reserved control the start and stop of soft initiator 2 by the closure of first A.C. contactor, 3 auxiliary contact a.Described soft initiator 2 is connected to bypass run signal output loop, soft initiator fault-signal output loop and soft initiator run signal output loop, the loop A 1-A2 of the 3rd relay 9 was charged when described bypass moved, the output run signal, the loop A 1-A2 of the 9th relay 10 is charged during described soft initiator 2 faults, the output fault-signal, the loop A 1-A2 of the tenth relay 11 was charged when described soft initiator moved, the output run signal;
The cold soft starting device of described high voltage direct current transmission valve also comprises electric current and voltage display unit 12, and display unit 12 1 ends are connected with electrical source of power by the 3rd breaker of plastic casing 13, and the display unit other end connects in circulating pump 7.
As shown in Figure 2, described control loop comprises soft start circuit controls circuit and Bypass Control circuit, soft start circuit controls circuit and Bypass Control circuit access control power supply in parallel, described soft start circuit controls circuit comprises first breaker of plastic casing, 1 first auxiliary contact b, the contact c of first relay 14, the contact d of second relay 15 and the loop A 1-A2 of first A.C. contactor 3, described first breaker of plastic casing, 1 first auxiliary contact b, the contact c of first relay 14 and the loop A 1-A2 of first A.C. contactor 3 connect successively, the contact d of second relay 15 is in parallel with the contact c of first relay 14, described Bypass Control circuit comprises second breaker of plastic casing, 4 first auxiliary contact e, the contact f of the 3rd relay 9, the contact g of the 4th relay 16, the contact h of the 5th relay 17 and the loop A 1-A2 of second A.C. contactor 5, described second breaker of plastic casing, 4 first auxiliary contact e, the contact f of the 3rd relay 9 and the loop A 1-A2 of second A.C. contactor 5 connect successively, the contact h of the contact g of the 4th relay 16 and the 5th relay 17 is in parallel with the contact f of the 3rd relay 9 respectively, the contact c of described first relay 14, the contact d of second relay 15, the contact h of the contact g of the 4th relay 16 and the 5th relay 17 is the PLC control point;
Described control loop also comprises first circuit breaker deciliter control circuit, described first circuit breaker deciliter control circuit comprises first breaker of plastic casing, the 1 second auxiliary contact m of connection successively and the loop A 1-A2 of the 6th relay 18, and the described soft circuit controls circuit that breaks is in parallel with soft start circuit controls circuit and Bypass Control circuit;
Described control loop also comprises pump operating cycle indication circuit, described pump operating cycle indication circuit comprises first A.C. contactor, 3 auxiliary contact i, second A.C. contactor, 5 auxiliary contact j, the loop A 1-A2 of indicator light and the 7th relay 19, described second A.C. contactor, 5 auxiliary contact j connect with indicator light, first A.C. contactor, 3 auxiliary contact i are in parallel with second A.C. contactor, 5 auxiliary contact j, the loop A 1-A2 of the 7th relay 19 is in parallel with indicator light, and described pump operating cycle indication circuit is in parallel with soft start circuit controls circuit and Bypass Control circuit;
Described control loop also comprises the circulating pump faulty line, described circulating pump faulty line comprises loop A 1-A2 and thermal relay 5 auxiliary contact 1 of second breaker of plastic casing, 4 second auxiliary contact k, the 8th relay 20, described second breaker of plastic casing, 4 second auxiliary contact k connect with the loop A 1-A2 of the 8th relay 20 with thermal relay 5 auxiliary contact 1 back in parallel, and described circulating pump faulty line is in parallel with soft start circuit controls circuit and Bypass Control circuit.
Above-described embodiment is preferred implementation 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 spiritual essence 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 (6)
1. the cold soft starting device of high voltage direct current transmission valve, it is characterized in that: described device comprises power loop and control loop, described power loop comprises soft open loop and bypass, the soft loop of opening comprises first breaker of plastic casing that connects successively, soft initiator and first A.C. contactor, bypass comprises second breaker of plastic casing and second A.C. contactor that connects successively, first breaker of plastic casing is in parallel with the second breaker of plastic casing input, be connected with electrical source of power then, first A.C. contactor is in parallel with the second A.C. contactor output, connects with thermel protection device and circulating pump then;
Described control loop comprises soft start circuit controls circuit and Bypass Control circuit, soft start circuit controls circuit and Bypass Control circuit access control power supply in parallel, described soft start circuit controls circuit comprises first breaker of plastic casing, first auxiliary contact, the contact of first relay, the coil of the contact of second relay and first A.C. contactor, described first breaker of plastic casing, first auxiliary contact, the coil of the contact of first relay and first A.C. contactor connects successively, the contact of second relay is in parallel with the contact of first relay, described Bypass Control circuit comprises second breaker of plastic casing, first auxiliary contact, the contact of the 3rd relay, the contact of the 4th relay, the coil of the contact of the 5th relay and second A.C. contactor, described second breaker of plastic casing, first auxiliary contact, the coil of the contact of the 3rd relay and second A.C. contactor connects successively, the contact of the contact of the 4th relay and the 5th relay is in parallel with the contact of the 3rd relay respectively, the contact of described first relay, the contact of second relay, the contact of the contact of the 4th relay and the 5th relay is the PLC control point;
Described soft initiator inserts electrical source of power by miniature circuit breaker, whether controls the start and stop of soft initiator by the closure of the first A.C. contactor auxiliary contact.
2. the cold soft starting device of high voltage direct current transmission valve according to claim 1 is characterized in that: described thermel protection device comprises thermal relay and the safety switch that connects successively.
3. the cold soft starting device of high voltage direct current transmission valve according to claim 1, it is characterized in that: described control loop also comprises pump operating cycle indication circuit, described pump operating cycle indication circuit comprises the first A.C. contactor auxiliary contact, the second A.C. contactor auxiliary contact, the coil of indicator light and the 7th relay, the described second A.C. contactor auxiliary contact are connected with indicator light, the first A.C. contactor auxiliary contact are in parallel with the second A.C. contactor auxiliary contact, the coil of the 7th relay is in parallel with indicator light, and described pump operating cycle indication circuit is in parallel with soft start circuit controls circuit and Bypass Control circuit.
4. the cold soft starting device of high voltage direct current transmission valve according to claim 2, it is characterized in that: described control loop also comprises the circulating pump faulty line, described circulating pump faulty line comprises coil and the thermal relay auxiliary contact of second breaker of plastic casing, second auxiliary contact, the 8th relay, connect with the coil of the 8th relay after described second breaker of plastic casing, second auxiliary contact and the parallel connection of thermal relay auxiliary contact, described circulating pump faulty line is in parallel with soft start circuit controls circuit and Bypass Control circuit.
5. the cold soft starting device of high voltage direct current transmission valve according to claim 1, it is characterized in that: described soft initiator is connected to bypass run signal output loop, soft initiator fault-signal output loop and soft initiator run signal output loop, the coil of the 3rd relay was charged when described bypass moved, the output run signal, the coil of the 9th relay is charged during described soft initiator fault, the output fault-signal, the coil of the tenth relay was charged when described soft initiator moved, the output run signal.
6. the cold soft starting device of high voltage direct current transmission valve according to claim 1, it is characterized in that: the cold soft starting device of described high voltage direct current transmission valve, also comprise electric current and voltage display unit, display unit one end is by the 3rd breaker of plastic casing, be connected with electrical source of power, the display unit other end connects in circulating pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110300790 CN102368671B (en) | 2011-09-30 | 2011-09-30 | High voltage direct current transmission valve cooling system soft starting apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110300790 CN102368671B (en) | 2011-09-30 | 2011-09-30 | High voltage direct current transmission valve cooling system soft starting apparatus |
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| CN102368671A CN102368671A (en) | 2012-03-07 |
| CN102368671B true CN102368671B (en) | 2013-08-21 |
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| CN 201110300790 Active CN102368671B (en) | 2011-09-30 | 2011-09-30 | High voltage direct current transmission valve cooling system soft starting apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105020126B (en) * | 2015-07-28 | 2017-05-17 | 广州高澜节能技术股份有限公司 | Power frequency control loop of high-voltage direct current transmission valve cooling main circulating pump |
| CN106602934A (en) * | 2015-10-20 | 2017-04-26 | 常州博瑞电力自动化设备有限公司 | Water pump soft start control circuit and method with bypass and dual redundancy |
| CN113949256B (en) * | 2021-10-15 | 2024-06-18 | 广东电网有限责任公司 | Topological structure for soft start control of flexible direct current distribution network converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS55106085A (en) * | 1979-02-06 | 1980-08-14 | Asmo Co Ltd | Switch device for motor |
| CN2899278Y (en) * | 2006-04-13 | 2007-05-09 | 弋东方 | High-voltage one-to-multiple soft starting system |
| CN201336644Y (en) * | 2008-12-17 | 2009-10-28 | 上海山宇电子设备有限公司 | Connection line for high torque fully intelligent soft starter and motor |
| CN201937520U (en) * | 2011-02-16 | 2011-08-17 | 深圳市美兆机电安装工程有限公司 | Soft starting system of cooling water pump |
| CN202261122U (en) * | 2011-09-30 | 2012-05-30 | 广州高澜节能技术股份有限公司 | Cold soft starting device for high-voltage DC (direct current) power transmission valve |
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Denomination of invention: Cold soft start device for HVDC transmission valve Effective date of registration: 20201103 Granted publication date: 20130821 Pledgee: Bank of China Limited Guangzhou Pearl River Branch Pledgor: GUANGZHOU GOALAND ENERGY CONSERVATION TECH Co.,Ltd. Registration number: Y2020440000348 |
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Date of cancellation: 20220726 Granted publication date: 20130821 Pledgee: Bank of China Limited Guangzhou Pearl River Branch Pledgor: GUANGZHOU GOALAND ENERGY CONSERVATION TECH Co.,Ltd. Registration number: Y2020440000348 |
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