CN211456794U - Power supply fast-cutting multistage matching device - Google Patents
Power supply fast-cutting multistage matching device Download PDFInfo
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- CN211456794U CN211456794U CN202020445618.XU CN202020445618U CN211456794U CN 211456794 U CN211456794 U CN 211456794U CN 202020445618 U CN202020445618 U CN 202020445618U CN 211456794 U CN211456794 U CN 211456794U
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Abstract
The power supply fast-switching multistage matching device can be matched with the fast-switching device to realize power supply conversion under special conditions, and through the conversion of the multistage fast-switching device, a temporary transition power supply is provided for an important load by using an ESP emergency power supply under the condition that a power supply network completely breaks down, the ESP emergency power supply is disconnected after a generator works, and the generator supplies power to the important load, so that stable and reliable operation of important power utilization equipment and the load is realized.
Description
Technical Field
The utility model relates to a power supply system safety field, especially a multistage cooperation device is cut soon to power.
Background
In the power supply system of a power plant, a quick switching device is often used, and the quick switching device can be used for quickly switching a high-voltage and high-load power supply, so that the power supply is ensured to be normal, and certain equipment is prevented from being damaged due to power supply switching. The conventional standby power supply automatic switching device generally starts the standby power supply to be switched on by using an auxiliary contact of a working power supply circuit breaker directly (or through a low-voltage relay and a time delay relay), and the mode is lack of phase frequency detection, and has low power and long switching time during common power switching, so that the application of the quick switching device can better provide stable operation guarantee for a power supply system.
The power supply mode of leading two loop power supply incoming lines from a power grid and adding standby automatic switching (BZT) cannot meet the requirements of particularly important loads in primary loads on power supply reliability and continuity, all power failure accidents occur, some are caused by internal faults, some are caused by power grid faults, and because a regional large power grid is connected to the upper part of main grid voltage, a power department can not obtain two independent power supplies in strict meaning no matter how many power lines are taken from the power grid. Therefore, various faults of the power grid can cause all power supply incoming lines to lose power supply at the same time, and power failure accidents are caused.
Disclosure of Invention
The utility model aims to solve the technical problem that a power cut multistage cooperation device soon is provided, can be behind the grid failure, the fast switch over power, and finally by diesel generator power supply, by EPS as transition source before diesel power supply is established, guarantee the reliable safety and stability operation of key equipment section.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
the power supply fast-cutting multistage matching device comprises a main power supply fast-cutting device, wherein the input end of the main power supply fast-cutting device is connected with a primary power supply and a secondary safety power supply, the output end of the main power supply fast-cutting device is connected with a ten-kilovolt safety section, a safety transformer is arranged below the ten-kilovolt safety section and is connected with the input end of a first fast-cutting device, the output end of the first fast-cutting device is connected with a low-voltage key load safety section, one of the low-voltage key load safety sections is connected with the input end of an EPS emergency power supply, the output end of the EPS emergency power supply is connected with a professional power load safety section, the output end of the EPS emergency power supply is also connected with the input end of a second fast-cutting device, the output end of the second fast-cutting device is connected with the input end of the first fast-cutting device, the input end of the second fast-, Self-throwing switch blades controlled by adjacent quick-cutting devices are arranged between the main supply quick-cutting device and a ten-kilovolt safety section, between the safety transformer and the first quick-cutting device, between the first quick-cutting device and the EPS emergency power supply, between the EPS emergency power supply and the second quick-cutting device, between the generator and the second quick-cutting device, and between the second quick-cutting device and the first quick-cutting device;
under the condition of normal power supply, a primary power supply source supplies a KV power supply to the primary power supply quick-switching device and an output end circuit thereof, a safety transformer supplies a V alternating-current power supply to the first quick-switching device and an output end circuit thereof, the output end of the first quick-switching device supplies power to the EPS emergency power supply and an output end thereof, the EPS emergency power supply is charged at the same time and supplies power to the output end, a switch between the EPS emergency power supply and the second quick-switching device is disconnected, and a switch between the second quick-switching device and the first quick-switching device is disconnected;
when one primary power supply fails, a knife switch between the primary power supply and the primary power supply fast switching device is disconnected, a knife switch between the secondary security power supply and the primary power supply fast switching device is connected, and the secondary security power supply supplies 10KV power to the primary power supply fast switching device and the output end circuit thereof;
when one primary power supply and two secondary security power supplies both have faults, the first quick-switching device detects that the power supply at the security transformer end is disconnected, at the moment, a switch between the second quick-switching device and the first quick-switching device is controlled to be switched on, a switch between the first quick-switching device and the EPS emergency power supply is controlled to be disconnected, a switch between the EPS emergency power supply and the second quick-switching device is switched on, the EPS emergency power supply supplies power to a low-voltage key load security section or a professional power load security section and waits for the generator to start working, and when the generator finishes generating power, the switch between the EPS emergency power supply and the second quick-switching device is disconnected, and the generator supplies power to the low-voltage key load security section.
The ten kilovolt safety section is connected with at least two safety transformers and can provide a multi-path V alternating current power supply.
The low-voltage key load security section is provided with at least two load branches, and can supply power to multiple paths of important electric equipment and loads.
The professional electricity load security section is provided with at least two load branches.
The utility model provides a multistage cooperation device is cut soon to power can cooperate and cut the power conversion under the device realization special case soon to through the conversion of multistage device that cuts soon, make under the complete circumstances of breaking down of power supply network, utilize ESP emergency power to provide interim transition power to key load, treat generator work back ESP emergency power disconnection, by the generator to important load power supply, thereby realized the reliable and stable operation of key consumer and load.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: the emergency power supply system comprises a primary power supply 1, a secondary security power supply 2, a primary power supply fast switching device 3, a ten-kilovolt security section 4, a security transformer 5, a first fast switching device 6, a low-voltage key load security section 7, an EPS emergency power supply 8, a professional power load security section 9, a second fast switching device 10 and a generator 11.
Detailed Description
As shown in fig. 1, the power supply fast-switching multistage matching device comprises a main supply fast-switching device 3, wherein the input end of the main supply fast-switching device 3 is connected with a primary power supply 1 and a secondary safety power supply 2, the output end of the main supply fast-switching device 3 is connected with a ten-kilovolt safety section 4, a safety transformer 5 is arranged below the ten-kilovolt safety section 4, the safety transformer 5 is connected with the input end of a first fast-switching device 6, the output end of the first fast-switching device 6 is connected with a low-voltage key load safety section 7, one of the low-voltage key load safety sections 7 is connected with the input end of an EPS emergency power supply 8, the output end of the EPS emergency power supply 8 is connected with a professional electricity consumption safety section 9, the output end of the EPS emergency power supply 8 is also connected with the input end of a second fast-switching device 10, the output end of the second fast-switching device 10, self-throw-in switch knives controlled by adjacent quick-cutting devices are arranged between a primary power supply 1 and a primary power supply quick-cutting device 3, between a secondary security power supply 2 and the primary power supply quick-cutting device 3, between the primary power supply quick-cutting device 3 and a ten kilovolt security section 4, between a security transformer 5 and a first quick-cutting device 6, between the first quick-cutting device 6 and an EPS emergency power supply 8, between the EPS emergency power supply 8 and a second quick-cutting device 10, between a generator 11 and a second quick-cutting device 10, and between the second quick-cutting device 10 and the first quick-cutting device 6;
under the condition of normal power supply, a primary power supply source 1 supplies 10KV power to a primary power supply fast-switching device 3 and an output end circuit thereof, a safety transformer 5 supplies 380V alternating-current power to a first fast-switching device 6 and an output end circuit thereof, the output end of the first fast-switching device 6 supplies power to an EPS emergency power supply 8 and an output end thereof, the EPS emergency power supply 8 charges and supplies power to the output end at the same time, a knife switch between the EPS emergency power supply 8 and a second fast-switching device 10 is disconnected, and a knife switch between the second fast-switching device 10 and the first fast-switching device 6 is disconnected;
when one primary power supply source 1 fails, a knife switch between the primary power supply source 1 and the main power supply fast switching device 3 is disconnected, a knife switch between the secondary security power supply 2 and the main power supply fast switching device 3 is connected, and 10KV power is supplied to the main power supply fast switching device 3 and an output end circuit thereof by the secondary security power supply 2;
when one primary power supply 1 and two secondary security power supplies 2 both have faults, the first fast switching device 6 detects that the power supply at the end of the security transformer 5 is disconnected, at the moment, a knife switch between the second fast switching device 10 and the first fast switching device 6 is controlled to be switched on, a knife switch between the first fast switching device 6 and the EPS emergency power supply 8 is controlled to be disconnected, a knife switch between the EPS emergency power supply 8 and the second fast switching device 10 is controlled to be switched on, the EPS emergency power supply 8 supplies power to the low-voltage key load security section 7 or the professional power load security section 9 to provide a transition power supply, and the generator 11 is waited to start working, when the generator 11 finishes generating power, the knife switch between the EPS emergency power supply 8 and the second fast switching device 10 is disconnected, and the generator 11 supplies power to the low-voltage key load security section 7.
The ten kilovolt safety section 4 is connected with at least two safety transformers 5 and can provide a multi-path 380V alternating current power supply.
The low-voltage key load security section 7 is provided with at least two load branches, and can supply power to multiple paths of important electric equipment and loads.
The professional electric load security section 9 is provided with at least two load branches.
Claims (4)
1. Multistage cooperation device is cut soon to power, characterized by: the emergency power supply system comprises a main supply quick-cutting device (3), wherein the input end of the main supply quick-cutting device (3) is connected with a primary power supply (1) and a secondary safety power supply (2), the output end of the main supply quick-cutting device (3) is connected with a ten-kilovolt safety section (4), a safety transformer (5) is arranged below the ten-kilovolt safety section (4), the safety transformer (5) is connected with the input end of a first quick-cutting device (6), the output end of the first quick-cutting device (6) is connected with a low-voltage key load safety section (7), one of the low-voltage key load safety sections (7) is connected with the input end of an EPS emergency power supply (8), the output end of the EPS emergency power supply (8) is connected with a professional power utilization load safety section (9), the output end of the EPS emergency power supply (8) is also connected with the input end of a second quick-cutting device (10), the output end, the input end of the second quick-cutting device (10) is also connected with a generator (11), a self-throw switch controlled by the adjacent quick-cutting device is arranged between the primary power supply (1) and the primary power supply quick-cutting device (3), between the secondary security power supply (2) and the primary power supply quick-cutting device (3), between the primary power supply quick-cutting device (3) and the ten kilovolt security section (4), between the security transformer (5) and the first quick-cutting device (6), between the first quick-cutting device (6) and the EPS emergency power supply (8), between the EPS emergency power supply (8) and the second quick-cutting device (10), between the generator (11) and the second quick-cutting device (10), and between the second quick-cutting device (10) and the first quick-cutting device (6).
2. The power supply fast switching multi-stage mating device of claim 1, wherein: the ten kilovolt safety section (4) is connected with at least two safety transformers (5).
3. The power supply fast switching multi-stage mating device of claim 1, wherein: the low-voltage key load security section (7) is provided with at least two load branches.
4. The power supply fast switching multi-stage mating device of claim 1, wherein: the professional electricity load security section (9) is provided with at least two load branches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020445618.XU CN211456794U (en) | 2020-03-31 | 2020-03-31 | Power supply fast-cutting multistage matching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020445618.XU CN211456794U (en) | 2020-03-31 | 2020-03-31 | Power supply fast-cutting multistage matching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211456794U true CN211456794U (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020445618.XU Active CN211456794U (en) | 2020-03-31 | 2020-03-31 | Power supply fast-cutting multistage matching device |
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|---|---|
| CN (1) | CN211456794U (en) |
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2020
- 2020-03-31 CN CN202020445618.XU patent/CN211456794U/en active Active
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