CN204481719U - A kind of power plant meets an urgent need the double parallel device of direct current pump start device - Google Patents
A kind of power plant meets an urgent need the double parallel device of direct current pump start device Download PDFInfo
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- CN204481719U CN204481719U CN201520243503.1U CN201520243503U CN204481719U CN 204481719 U CN204481719 U CN 204481719U CN 201520243503 U CN201520243503 U CN 201520243503U CN 204481719 U CN204481719 U CN 204481719U
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Abstract
The double parallel device that the utility model provides a kind of power plant to meet an urgent need direct current oil pump soft initiator.This double parallel device comprises distant place instruction module, main starter U1, starter U2 for subsequent use and Logic control module; The main circuit of main starter U1 and the main circuit of starter U2 for subsequent use are connected in parallel; Main starter U1 is BUCK transform direct current oil pump soft initiator, and main starter U1 is provided with " stopped status " contact KM1, start-up command interface and shutdown command interface; Starter U2 for subsequent use is resistance-type direct current pump start device; Effectively can eliminate rush of current during direct current pump start, significantly lower the impact on direct current oil pump self, supplying DC screen and other power consumption equipment and infringement, there is again stronger anti-overload ability.
Description
Technical field:
The utility model relates to a kind of power plant and to meet an urgent need the double parallel device of direct current oil pump soft initiator, belongs to the technical field of relaying protection.
Background technology:
For buffered DC pump start electric current, direct current oil pump (motor) is met an urgent need when starting by power plant, need seal in high-power resistance, excised after direct current machine normally starts again at starting-up later time.The feature of this resistance-type DC motor soft starter is that structure is simple, anti-overload ability is strong, but the mechanical switch life-span is short, there is adhesion problems, during electric motor starting, impulse current is large, easily causes serious impact to direct current oil pump itself, supplying DC screen and other power consumption equipment.
In recent years with the development of power electronic technology, there is a kind of BUCK transform DC motor soft starter based on direct voltage wave chopping technology.When starting by this way, the duty ratio of the electronic power switch of BUCK circuit can constantly be changed from small to big, its output voltage corresponding can be increased to rated voltage by zero linear, thus truly achieving the level and smooth soft start of direct current oil pump, substantially rush of current during direct current pump start can be eliminated, and the impact of therefore significantly lowering direct current machine self, supplying DC screen and other power consumption equipment and infringement.But due to the congenital fragility of power electronic element, this kind equipment anti-overload ability is limited, under extreme conditions easily there is open circuit or short trouble.
Utility model content:
For the deficiencies in the prior art, the double parallel device that the utility model provides a kind of power plant to meet an urgent need direct current oil pump soft initiator.This device, takes into account the advantage of two kinds of direct current pump start devices, effectively can eliminate rush of current during direct current pump start, significantly lowers the impact on direct current oil pump, supplying DC screen and other power consumption equipment and infringement, has again stronger anti-overload ability.
The technical solution of the utility model is as follows:
Power plant meets an urgent need the double parallel device of direct current pump start device, comprises distant place instruction module, main starter U1, starter U2 for subsequent use and Logic control module; The main circuit of main starter U1 and the main circuit of starter U2 for subsequent use are connected in parallel; Main starter U1 is BUCK transform direct current oil pump soft initiator, and main starter U1 is provided with " stopped status " contact KM1, start-up command interface and shutdown command interface; Starter U2 for subsequent use is resistance-type direct current pump start device, and starter U2 for subsequent use is provided with " shutdown command state " contact KM2, start-up command interface and shutdown command interface; Described distant place instruction module is provided with start-up command contact S1 and shutdown command contact S2; Described start-up command contact S1, shutdown command contact S2, " stopped status " contact KM1, " shutdown command state " contact KM2 andlogic control model calling respectively.
Start-up command contact S1, shutdown command contact S2, " stopped status " contact KM1, " shutdown command state " contact KM2 andlogic control model calling respectively, the start-up command of the main starter U1 of common generation, starter U2 for subsequent use and shutdown command control logic; The start-up command contact S1 adhesive of described distant place instruction module represents distant place start-up command and starts, and release disconnection represents this order fulfillment; The S2 adhesive of shutdown command contact represents distant place shutdown command and starts, and release disconnection represents this order fulfillment.
220V direct current cabinet is powered and to be powered to direct current oil pump through direct current pump start device, powered by BUCK transform direct current oil pump soft initiator under normal circumstances, thus ensure the real level and smooth start and stop of direct current oil pump, reach the substantive object promoting direct current cabinet and direct current oil pump reliability, stability, and extend its useful life, reduce its maintenance cost; When BUCK transform direct current oil pump soft initiator breaks down, then have to take the second best, automatically start standby electricity resistive direct current pump start device, under guaranteeing fault condition, direct current oil pump still can normally start.Though resistance-type direct current pump start device has, starting current is large, the easy adhesion of mechanical contact and the problem of restricted lifetime, and anti-overload ability is strong, is more suitable for emergency starting direct current oil pump under extreme conditions.
Preferred according to the utility model, described Logic control module is provided with general-purpose relay K1, general-purpose relay K2 and time relay K3; General-purpose relay K1 controls normally opened contact K1-1 and normally opened contact K1-2; General-purpose relay K2 controls normally opened contact K2-1 and normally opened contact K2-2; Time relay K3 controls normally opened contact K3-1 and time delay normally opened contact K3-2; The start-up command interface of main starter U1 is connected with normally opened contact K1-2 and normally opened contact K2-1 respectively with shutdown command interface; The start-up command interface of access starter U2 for subsequent use after time delay normally opened contact K3-2 and " stopped status " contact KM1 connects, normally opened contact K2-2 is connected with the shutdown command interface of starter U2 for subsequent use; The action feature of time delay normally opened contact K3-2: namely time relay K3 power down disconnects, time relay K3 powers up and closes after setting-up time time delay;
The control coil of described general-purpose relay K1 is connected with start-up command contact S1 and is accessed 220V DC power supply afterwards; When a distant place, instruction module sends start-up command, the S1 adhesive of start-up command contact, and general-purpose relay K1 control coil is energized, normally opened contact K1-1, normally opened contact K1-2 adhesive thereupon; When a distant place, start-up command terminates, and start-up command contact S1 disconnects, and normally opened contact K1-1, normally opened contact K1-2 disconnect.
The control coil of described general-purpose relay K2 is connected with shutdown command contact S2 and is accessed 220V DC power supply afterwards; When a distant place, instruction module sends shutdown command, the S2 adhesive of shutdown command contact, and general-purpose relay K2 control coil is energized, normally opened contact K2-1, normally opened contact K2-2 adhesive; When a distant place, shutdown command terminates, and shutdown command contact S2 disconnects, and normally opened contact K2-1, normally opened contact K2-2 disconnect.
The control coil of described time relay K3 is connected with the parallel connection of " shutdown command state " contact KM2 and normally opened contact K1-1, normally opened contact K3-1 and is accessed 220V DC power supply afterwards.When a distant place, start-up command starts, normally opened contact K1-1 adhesive, the control coil energising of time relay K3, normally opened contact K3-1 adhesive, and normally opened contact K3-2 is in adhesive after setting-up time time delay; When a distant place, start-up command terminates, and the adhesive of normally opened contact K3-1 causes time relay K3 control coil to keep energising---and distant place start-up command is locked in time relay K3 (normally opened contact K3-1, normally opened contact K3-2 maintain attracting state).
" stopped status " contact KM1 is normally-closed contact; The start-up command interface of main starter U1 docks with normally opened contact K1-2, and the shutdown command interface of main starter U1 docks with normally opened contact K2-1.What " stopped status " contact KM1 reflected is the on off state of main starter U1.
" shutdown command state " contact KM2 is normally-closed contact; The shutdown command interface of starter U2 for subsequent use docks with normally opened contact K2-2; The tandem docking of the start-up command interface of starter U2 for subsequent use and time delay normally opened contact K3-2, " stopped status " contact KM1.What " shutdown command state " contact KM2 reflected is a distant place of starter U2 for subsequent use or the state of local shutdown command.
If main starter U1 is in normal shutdown state, when distant place start-up command occurs, normally opened contact K1-2 adhesive, main starter U1 directly enters start process, and " stopped status " contact KM1 disconnects thereupon, and starter U2 for subsequent use cannot start; If main starter U1 is in fault off-mode, when distant place start-up command occurs, main starter U1 cannot start, and " stopped status " contact KM1 is kept closed, and starter U2 for subsequent use enters start-up course under time delay normally opened contact K3-2 drives after setting-up time time delay; If broken down after main starter U1 normally starts or in start-up course, " stopped status " contact KM1 closes thereupon, and starter U2 for subsequent use enters start process thereupon under time delay normally opened contact K3-2 drives.
When distant place shutdown command occurs, normally opened contact K2-1, normally opened contact K2-2 adhesive, no matter main starter U1 or starter U2 for subsequent use is in open state, all enters shutdown process; In the shutdown command valid period, " shutdown command state " contact KM2 disconnects all the time, cause the control coil power-off of time relay K3, normally opened contact K3-1, time delay normally opened contact K3-2 discharge disconnection---and the distant place start-up command being locked in time relay K3 terminates; After shutdown command terminates, " shutdown command state " contact KM2 recovers closed, for distant place start-up command is ready next time.
Preferred further according to the utility model, the setting-up time of described time delay normally opened contact K3-2 is 1 second-32 seconds.
Preferred according to the utility model, described main starter U1 is provided with fuse F1.When BUCK transform direct current oil pump soft initiator generation internal short circuit fault, fuse can quick fuse, in case fault pervasion direct current cabinet DC circuit breaker overcurrent tripping.
Power plant meets an urgent need the control method of double parallel device of direct current pump start device, comprises step as follows:
1. start process:
A, distant place instruction module send start-up command, and start-up command contact S1 closes;
The control coil of B, general-purpose relay K1 powers up, and normally opened contact K1-1 and normally opened contact K1-2 closes; Time relay K3 control coil powers up, and the closed time relay K3 control coil that causes of normally opened contact K3-1 continues energising, and time delay normally opened contact K3-2 is closed after setting-up time time delay;
If the main starter U1 of C is in normal shutdown state, the closed of normally opened contact K1-2 causes main starter U1 to enter start process at once, " stopped status " contact KM1 disconnects thereupon, ensures that before time delay normally opened contact K3-2 adhesive, block starter U2 for subsequent use enters start-up course; If main starter U1 is in malfunction, main starter U1 cannot start, and " stopped status " contact KM1 is kept closed, time delay normally opened contact K3-2 adhesive after setting-up time time delay, and starter U2 for subsequent use enters start process thereupon;
2. shutdown process:
D, distant place instruction module send shutdown command, and shutdown command contact S2 closes;
The control coil of E, general-purpose relay K2 powers up, and K2-1 and K2-2 closes;
If the main starter U1 of F is in open state, the closed of K2-1 causes main starter U1 to enter shutdown process; If now main starter U1 fault, starter U2 for subsequent use is in open state, and the closed of K2-2 causes starter U2 for subsequent use to enter shutdown process;
H, shutdown command contact S2 period of contact " shutdown command state " contact KM2 disconnect, and cause time relay K3 control coil dead electricity, and normally opened contact K3-1, time delay normally opened contact K3-2 disconnect, and whole shutdown process terminates;
3. starter U2 emergency starting process for subsequent use when breaking down in main starter U1 running:
If I in the distance start-up command terminates rear main starter U1 and breaks down suddenly, then main starter U1 closes automatically, " stopped status " contact KM1 closes immediately, and now normally opened contact K3-2 is in attracting state or prepares attracting state, and starter U2 for subsequent use enters start process thereupon;
If the main starter U1 of J occurs that internal short-circuit cannot autonomous shutdown, the fuse F1 of main starter U1 fuses, and " stopped status " contact KM1 closes thereupon, and starter U2 for subsequent use enters start process thereupon.
Advantage of the present utility model is:
1, power plant described in the utility model meets an urgent need the double parallel device of direct current pump start device, by main starter and starter for subsequent use are connected in parallel, take into account the advantage of two kinds of direct current pump start devices, effectively can eliminate rush of current during direct current pump start, significantly lower the impact on direct current machine self, supplying DC screen and other power consumption equipment and infringement, there is again stronger anti-overload ability;
2, the meet an urgent need Logic control module structure of double parallel device of direct current pump start device of power plant described in the utility model is simple, rationally distributed, safe and efficient.
Accompanying drawing illustrates:
Fig. 1 is the main circuit diagram of Traditional DC pump start device;
Fig. 2 is that power plant described in the utility model meets an urgent need the main circuit diagram of double parallel device of direct current pump start device;
Fig. 3 is that power plant described in the utility model meets an urgent need the control logic block diagram of double parallel device of direct current pump start device;
Fig. 4 is the system start and stop sequential chart of main starter described in the utility model when being in normal shutdown state;
Fig. 5 is the system start and stop sequential chart of main starter described in the utility model when being in fault off-mode;
Fig. 6 is system start and stop sequential chart when breaking down after main starter described in the utility model start.
Embodiment:
Below in conjunction with embodiment and Figure of description, the utility model is described in detail, but is not limited thereto.
Embodiment 1,
As Figure 1-3.
Power plant meets an urgent need the double parallel device of direct current pump start device, comprises distant place instruction module, main starter U1, starter U2 for subsequent use and Logic control module; The main circuit of main starter U1 and the main circuit of starter U2 for subsequent use are connected in parallel; Main starter U1 is BUCK transform direct current oil pump soft initiator, and main starter U1 is provided with " stopped status " contact KM1, start-up command interface and shutdown command interface; Starter U2 for subsequent use is resistance-type direct current pump start device, and starter U2 for subsequent use is provided with " shutdown command state " contact KM2, start-up command interface and shutdown command interface; Described distant place instruction module is provided with start-up command contact S1 and shutdown command contact S2; Described start-up command contact S1, shutdown command contact S2, " stopped status " contact KM1, " shutdown command state " contact KM2 andlogic control model calling respectively.
Start-up command contact S1, shutdown command contact S2, " stopped status " contact KM1, " shutdown command state " contact KM2 andlogic control model calling respectively, the start-up command of the main starter U1 of common generation, starter U2 for subsequent use and shutdown command control logic; The start-up command contact S1 adhesive of described distant place instruction module represents distant place start-up command and starts, and release disconnection represents this order fulfillment; The S2 adhesive of shutdown command contact represents distant place shutdown command and starts, and release disconnection represents this order fulfillment.
220V direct current cabinet is powered and to be powered to direct current oil pump through direct current pump start device, powered by BUCK transform direct current oil pump soft initiator under normal circumstances, thus ensure the real level and smooth start and stop of direct current oil pump, reach the substantive object promoting direct current cabinet and direct current oil pump reliability, stability, and extend its useful life, reduce its maintenance cost; When BUCK transform direct current oil pump soft initiator breaks down, then have to take the second best, automatically start standby electricity resistive direct current pump start device, under guaranteeing fault condition, direct current oil pump still can normally start.Though resistance-type direct current pump start device has, starting current is large, the easy adhesion of mechanical contact and the problem of restricted lifetime, and anti-overload ability is strong, is more suitable for emergency starting direct current oil pump under extreme conditions.
Described Logic control module is provided with general-purpose relay K1, general-purpose relay K2 and time relay K3; General-purpose relay K1 controls normally opened contact K1-1 and normally opened contact K1-2; General-purpose relay K2 controls normally opened contact K2-1 and normally opened contact K2-2; Time relay K3 controls normally opened contact K3-1 and time delay normally opened contact K3-2, and the setting-up time of time delay normally opened contact K3-2 is 6s; The start-up command interface of main starter U1 is connected with normally opened contact K1-2 and normally opened contact K2-1 respectively with shutdown command interface; The start-up command interface of access starter U2 for subsequent use after time delay normally opened contact K3-2 and " stopped status " contact KM1 connects, and normally opened contact K2-2 is connected with the shutdown command interface of starter U2 for subsequent use.The action feature of time delay normally opened contact K3-2: namely time relay K3 power down disconnects, through timing closing in 6 seconds after time relay K3 powers up;
The control coil of described general-purpose relay K1 is connected with start-up command contact S1 and is accessed 220V DC power supply afterwards; When a distant place, instruction module sends start-up command, the S1 adhesive of start-up command contact, and general-purpose relay K1 control coil is energized, normally opened contact K1-1, normally opened contact K1-2 adhesive thereupon; When a distant place, start-up command terminates, and start-up command contact S1 disconnects, and normally opened contact K1-1, normally opened contact K1-2 disconnect.
The control coil of described general-purpose relay K2 is connected with shutdown command contact S2 and is accessed 220V DC power supply afterwards; When a distant place, instruction module sends shutdown command, the S2 adhesive of shutdown command contact, and general-purpose relay K2 control coil is energized, normally opened contact K2-1, normally opened contact K2-2 adhesive; When a distant place, shutdown command terminates, and shutdown command contact S2 disconnects, and normally opened contact K2-1, normally opened contact K2-2 disconnect.
The control coil of described time relay K3 is connected with the parallel connection of " shutdown command state " contact KM2 and normally opened contact K1-1, normally opened contact K3-1 and is accessed 220V DC power supply afterwards.When a distant place, start-up command starts, normally opened contact K1-1 adhesive, the control coil energising of time relay K3, normally opened contact K3-1 adhesive thereupon, normally opened contact K3-2 time delay adhesive after 6 seconds; When a distant place, start-up command terminates, and the adhesive of normally opened contact K3-1 causes time relay K3 control coil to keep energising---and distant place start-up command is locked in time relay K3 (normally opened contact K3-1, normally opened contact K3-2 maintain attracting state).
" stopped status " contact KM1 is normally-closed contact; The start-up command interface of main starter U1 docks with normally opened contact K1-2, and the shutdown command interface of main starter U1 docks with normally opened contact K2-1.What " stopped status " contact KM1 reflected is the on off state of main starter U1.
" shutdown command state " contact KM2 is normally-closed contact; The shutdown command interface of starter U2 for subsequent use docks with normally opened contact K2-1; The tandem docking of the start-up command interface of starter U2 for subsequent use and time delay normally opened contact K3-2, " stopped status " contact KM1.What " shutdown command state " contact KM2 reflected is a distant place of starter U2 for subsequent use or the state of local shutdown command.
Embodiment 2,
Power plant as described in Example 1 meets an urgent need the double parallel device of direct current pump start device, and difference is: described main starter U1 is provided with fuse F1.When BUCK transform direct current oil pump soft initiator generation internal short circuit fault, fuse can quick fuse, in case fault pervasion direct current cabinet DC circuit breaker overcurrent tripping.
Embodiment 3,
Power plant as described in Example 2 meets an urgent need the double parallel device of direct current pump start device, and difference is: time relay K3 control coil powers up and normally opened contact K3-2 closes after time delay in 4 seconds.
Claims (4)
1. power plant meets an urgent need a double parallel device for direct current pump start device, it is characterized in that: comprise distant place instruction module, main starter U1, starter U2 for subsequent use and Logic control module; The main circuit of main starter U1 and the main circuit of starter U2 for subsequent use are connected in parallel; Main starter U1 is BUCK transform direct current oil pump soft initiator, and main starter U1 is provided with " stopped status " contact KM1, start-up command interface and shutdown command interface; Starter U2 for subsequent use is resistance-type direct current pump start device, and starter U2 for subsequent use is provided with " shutdown command state " contact KM2, start-up command interface and shutdown command interface; Described distant place instruction module is provided with start-up command contact S1 and shutdown command contact S2; Described start-up command contact S1, shutdown command contact S2, " stopped status " contact KM1, " shutdown command state " contact KM2 andlogic control model calling respectively.
2. power plant according to claim 1 meets an urgent need the double parallel device of direct current pump start device, it is characterized in that: described Logic control module is provided with general-purpose relay K1, general-purpose relay K2 and time relay K3; General-purpose relay K1 controls normally opened contact K1-1 and normally opened contact K1-2; General-purpose relay K2 controls normally opened contact K2-1 and normally opened contact K2-2; Time relay K3 controls normally opened contact K3-1 and time delay normally opened contact K3-2; The start-up command interface of main starter U1 is connected with normally opened contact K1-2 and normally opened contact K2-1 respectively with shutdown command interface; The start-up command interface of access starter U2 for subsequent use after time delay normally opened contact K3-2 and " stopped status " contact KM1 connects, and normally opened contact K2-2 is connected with the shutdown command interface of starter U2 for subsequent use;
The control coil of described general-purpose relay K1 is connected with start-up command contact S1 and is accessed 220V DC power supply afterwards;
The control coil of described general-purpose relay K2 is connected with shutdown command contact S2 and is accessed 220V DC power supply afterwards;
The control coil of described time relay K3 is connected with the parallel connection of " shutdown command state " contact KM2 and normally opened contact K1-1, normally opened contact K3-1 and is accessed 220V DC power supply afterwards;
" stopped status " contact KM1 is normally-closed contact; The start-up command interface of main starter U1 docks with normally opened contact K1-2, and the shutdown command interface of main starter U1 docks with normally opened contact K2-1;
" shutdown command state " contact KM2 is normally-closed contact; The shutdown command interface of starter U2 for subsequent use docks with normally opened contact K2-2; The tandem docking of the start-up command interface of starter U2 for subsequent use and time delay normally opened contact K3-2, " stopped status " contact KM1;
3. power plant according to claim 1 meets an urgent need the double parallel device of direct current pump start device, it is characterized in that: described main starter U1 is provided with fuse F1.
4. power plant according to claim 2 meets an urgent need the double parallel device of direct current pump start device, it is characterized in that: the setting-up time of described time delay normally opened contact K3-2 is 1 second-32 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520243503.1U CN204481719U (en) | 2015-04-21 | 2015-04-21 | A kind of power plant meets an urgent need the double parallel device of direct current pump start device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520243503.1U CN204481719U (en) | 2015-04-21 | 2015-04-21 | A kind of power plant meets an urgent need the double parallel device of direct current pump start device |
Publications (1)
| Publication Number | Publication Date |
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| CN204481719U true CN204481719U (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520243503.1U Withdrawn - After Issue CN204481719U (en) | 2015-04-21 | 2015-04-21 | A kind of power plant meets an urgent need the double parallel device of direct current pump start device |
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| CN (1) | CN204481719U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767425A (en) * | 2015-04-21 | 2015-07-08 | 山东大学 | Double-unit parallel connection device of power plant emergency direct-current oil pump starter and control method thereof |
| CN108061233A (en) * | 2017-11-30 | 2018-05-22 | 上海电气电站设备有限公司 | A kind of lubricating oil system alternating current-direct current oil pump switching system for considering dual redundant |
-
2015
- 2015-04-21 CN CN201520243503.1U patent/CN204481719U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767425A (en) * | 2015-04-21 | 2015-07-08 | 山东大学 | Double-unit parallel connection device of power plant emergency direct-current oil pump starter and control method thereof |
| CN104767425B (en) * | 2015-04-21 | 2017-07-11 | 山东大学 | The double parallel device and its control method of a kind of emergent direct current pump start device of power plant |
| CN108061233A (en) * | 2017-11-30 | 2018-05-22 | 上海电气电站设备有限公司 | A kind of lubricating oil system alternating current-direct current oil pump switching system for considering dual redundant |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150715 Effective date of abandoning: 20170711 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20150715 Effective date of abandoning: 20170711 |