CN216489768U - Power supply system for realizing complete uninterrupted replacement of transformer on column - Google Patents
Power supply system for realizing complete uninterrupted replacement of transformer on column Download PDFInfo
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Abstract
The utility model relates to a power supply system for realizing complete uninterrupted power supply replacement of a transformer on a column, which comprises a main power supply line, wherein the main power supply line comprises a transformer to be maintained and connected with a power grid and at least two electric load branches arranged on the secondary side of the transformer to be maintained; the new transformer is connected with the transformer to be overhauled in parallel through the transformer replacing module and used for supplying power to the electric load branch in the process of replacing the transformer to be overhauled; the transformer replacement module is provided with a group of transformer spare contacts connected with the new transformer in parallel, and after the group of transformer spare contacts are connected with one transformer, the transformer on the transformer spare contacts is connected with the new transformer in parallel. The utility model discloses can realize changing new transformer and wait to overhaul the operation that does not have a power failure completely when the transformer, reduce the influence of changing the transformer in-process to power consumption load branch road.
Description
Technical Field
The utility model relates to a medium voltage distribution technical field, concretely relates to realize not having the power failure completely and change power supply system of transformer on post.
Background
Development of complete uninterrupted operation overhaul/transformer replacement equipment and engineering application research are carried out, the requirement of a power system on complete uninterrupted operation of replacing/overhauling a transformer in a station area on a 10kV overhead line column is mainly met, and a set of vehicle-mounted uninterrupted operation equipment with excellent performance, complete functions, high integration and wide application range and a corresponding engineering application solution are provided for the equipment.
The proportion of old transformers in the existing distribution network lines is large, the loss rate and the fault rate are high, and the power failure loss and the user influence of power failure maintenance/replacement do not meet the requirements of power system construction. It is imperative to overhaul/replace the transformer without shutting down the power supply. Therefore, there is a need to design a power supply system capable of replacing the transformer without power outage, so as to meet the needs of the power industry.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the technical problem who exists among the prior art, provide a realize not having the power failure completely and change the power supply system of transformer on post to reach the purpose of changing the transformer in-process not having the power failure operation completely, adapt to the electric power industry development demand.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a power supply system for realizing complete uninterrupted power supply replacement of an on-column transformer comprises a main power supply line, wherein the main power supply line comprises a to-be-repaired transformer connected to a power grid and at least two electric load branches arranged on the secondary side of the to-be-repaired transformer, the power supply system further comprises a new transformer and a transformer replacement module, and the transformer replacement module is detachably connected with the main power supply line and used for building a bypass of the to-be-repaired transformer; the new transformer is connected with the transformer to be overhauled in parallel through the transformer replacing module and used for supplying power to the electric load branch in the process of replacing the transformer to be overhauled; the transformer replacement module is provided with a group of transformer standby contacts connected with the new transformer in parallel, and after the group of transformer standby contacts are connected with one transformer, the transformer on the transformer standby contacts is connected with the new transformer in parallel.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Preferably, the transformer replacement module comprises a transformer primary switch module and a transformer secondary switch module which are independent of each other, the transformer primary switch module comprises a first switch module, a second switch module and a third switch module, one end of the first switch module and one end of the second switch module are connected with one end of the third switch module in a star shape, the other end of the first switch module is connected to a power grid, the other end of the second switch module is connected with the primary of a new transformer, and the other end of the third switch module is used as a first standby connection point; the transformer secondary switch module comprises a fourth switch module, a fifth switch module, a sixth switch module and a seventh switch module, one end of the fourth switch module, one end of the fifth switch module, one end of the sixth switch module and one end of the seventh switch module are connected in a star shape, the other end of the fourth switch module and the other end of the fifth switch module are respectively connected with two power load branches of a power supply system, the other end of the sixth switch module is connected with the secondary of a new transformer, the other end of the seventh switch module is used as a second standby contact, and the first standby contact and the second standby contact form a transformer standby contact.
Preferably, the main power supply line includes a first overcurrent protection module, a transformer to be overhauled, an eighth switch module, a plurality of ninth switch modules and a plurality of second overcurrent protection modules, the primary of the transformer to be overhauled is connected into the power grid through the first overcurrent protection module, the secondary of the transformer to be overhauled is connected with the eighth switch module in series and then is divided into a plurality of power supply branches, and each power supply branch is connected with a plurality of power load branches in a one-to-one correspondence mode after being connected with at least one ninth switch module and at least one second overcurrent protection module in series respectively.
Preferably, when the transformer to be overhauled in the main power supply line is to be dismounted, the first switch module, the second switch module, the fourth switch module, the sixth switch module, the first overcurrent protection module, the eighth switch module and the ninth switch module are switched on, the third switch module, the fifth switch module and the seventh switch module are switched off, and the transformer to be overhauled and the new transformer are both powered on and run at the moment.
Preferably, when the transformer to be overhauled in the main power supply line is disassembled, the first overcurrent protection module, the eighth switch module, the ninth switch module, the third switch module and the seventh switch module are switched off, the first switch module, the second switch module, the fourth switch module, the fifth switch module and the sixth switch module are switched on, at the moment, the transformer to be overhauled is powered off and stops running, and the new transformer continues to be powered on and run.
Preferably, when a new transformer is detached from the transformer replacing module and is installed in a main power supply line, the primary side of the transformer to be overhauled is connected with a first standby contact on the third switch module, the secondary side of the transformer to be overhauled is connected with a second standby contact on the seventh switch module, the first switch module, the third switch module, the fourth switch module, the fifth switch module and the seventh switch module are switched on at the moment, the first overcurrent protection module, the second switch module, the sixth switch module, the eighth switch module and the ninth switch module are switched on, and the transformer to be overhauled is powered on through the transformer replacing module to operate at the moment.
Preferably, after the new transformer is installed in the main power supply line, when the transformer to be repaired is removed from the transformer replacement module, the eighth switch module and the ninth switch module are switched on, the first switch module, the second switch module, the third switch module, the fourth switch module, the fifth switch module, the sixth switch module and the seventh switch module are switched on, and at this time, the new transformer is powered on and operates in the main power supply line.
Preferably, the eighth switch module comprises a disconnecting switch and a circuit breaker which are connected in series, and the disconnecting switch is arranged adjacent to the transformer and used for providing a visual breakpoint for the transformer replacement process.
The utility model has the advantages that: when the transformer to be overhauled in the main power supply line is overhauled, the transformer to be overhauled needs to be replaced by a new transformer, and then the transformer to be overhauled is overhauled. In order to ensure that each power utilization load branch does not stop power in the maintenance process, a transformer replacement module can be connected with a new transformer to form a bypass, and power is supplied to subsequent power utilization loads through the bypass; after the transformer to be overhauled is dismounted, in order to replace a new transformer into the main power supply line, a transformer replacing module and the replaced transformer to be overhauled form a second bypass, and the two bypasses run in parallel; when the two bypasses operate stably, a new transformer in the bypass is detached and installed in the main power supply line, so that the new transformer drives the main power supply line to operate; and finally, removing the second bypass, removing the transformer to be overhauled, and removing the transformer to be overhauled for overhaul. The utility model discloses a power supply system has realized under the prerequisite that the power consumption load branch road of rear end does not have a power failure, accomplishes whole power supply system's new and old transformer and changes, has greatly reduced the loss that the power failure overhauld the transformer and brought.
Drawings
FIG. 1 is a circuit topology diagram of the present invention when a first bypass is lapped;
FIG. 2 is a circuit topology diagram of the transformer to be overhauled when the utility model is disassembled;
FIG. 3 is a circuit topology diagram of the present invention when the second bypass is lapped;
FIG. 4 is a circuit topology diagram of the present invention when installing a new transformer;
fig. 5 is the utility model discloses waiting to overhaul the transformer and changing the circuit structure chart of accomplishing back.
In the drawings, the components represented by the respective reference numerals are listed below:
t1, a transformer to be overhauled, T2, a new transformer, K-H, a first switch module, K-J, a second switch module, K-I, a third switch module, K-K, a fourth switch module, K-M, a fifth switch module, K-L, a sixth switch module, K-N, a seventh switch module, K-B, a disconnecting switch, K-D/K-E, a ninth switch module, K-C, a circuit breaker, K-A, a first overcurrent protection module, K-F/K-G, a second overcurrent protection module, J-A-J-L and an electrical connection point.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1 to 5, the present embodiment provides a power supply system for realizing complete replacement of a transformer on a column without power outage, where the power supply system includes a main power supply line, the main power supply line includes a to-be-overhauled transformer T1 connected to a power grid and at least two power consumption load branches arranged on a secondary side of the to-be-overhauled transformer T1, and during normal operation, the secondary side of the to-be-overhauled transformer T1 supplies power to each power consumption load branch; the power supply system also comprises a new transformer T2 and a transformer replacement module, wherein the transformer replacement module is detachably connected with the main power supply line and is used for building a bypass of the transformer T1 to be overhauled; the new transformer T2 is connected in parallel with the transformer T1 to be overhauled through the transformer replacing module and is used for supplying power to the electric load branch in the process of replacing the transformer T1 to be overhauled. The transformer replacement module is provided with a group of transformer spare contacts connected with the new transformer T2 in parallel, and after the group of transformer spare contacts is connected with one transformer, the transformer on the transformer spare contacts is connected with the new transformer T2 in parallel.
When the power supply system is in a normal operation state, the transformer replacement module and the main power supply line are in a disconnected state, the main power supply line operates independently, the old transformer gets power from the power grid, and power is supplied to each power load branch at the rear end after voltage conversion. When the transformer T1 to be overhauled needs to be replaced or overhauled due to aging and the like, the transformer replacing module is connected with the main power supply line in parallel, and the new transformer T2 is connected in series in the transformer replacing module, so that the transformer replacing module and the new transformer T2 form a bypass of the transformer T1 to be overhauled of the main power supply line. The primary power supply of the transformer T1 to be overhauled is disconnected, the bypass can be switched, and the purposes of taking power from the power grid and supplying power to the rear-end power load by the new transformer T2 are achieved. When the new transformer T2 supplies power, the transformer T1 to be overhauled can be detached from the main power supply line, if the transformer T1 to be overhauled is only overhauled on site, the transformer T1 to be overhauled can be installed back to the main power supply line after the overhaul is finished, and the transformer T1 to be overhauled can be operated again. If the transformer to be repaired T1 needs to be replaced due to aging, etc., the detached transformer to be repaired T1 is connected to the spare transformer contact of the transformer replacement module. Because the standby contact of the transformer is connected with the new transformer T2 in parallel, the new transformer T2 and the transformer T1 to be overhauled simultaneously supply power to the rear-end electric load branch. And (3) detaching a new transformer T2 from the transformer replacement module, installing the new transformer T2 at the position of the original transformer T1 to be repaired on the main power supply line, detaching the transformer T1 to be repaired on the standby contact of the transformer after the operation is stable, and removing the connection between the transformer replacement module and the main power supply line, namely completing the replacement of the new transformer and the old transformer in the main power supply line on the premise of no power outage completely.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
In the embodiment, the transformer replacing module comprises a transformer primary switch module and a transformer secondary switch module which are independent of each other, the transformer primary switch module comprises a first switch module K-H, a second switch module K-J and a third switch module K-I, one end of the first switch module K-H and one end of the second switch module K-J are connected with one end of the third switch module K-I, the other end of the first switch module K-H is connected to a power grid, the other end of the second switch module K-J is connected with the primary of a new transformer T2, and the other end of the third switch module K-I is used as a first standby contact; the transformer secondary switch module comprises a fourth switch module K-K, a fifth switch module K-M, a sixth switch module K-L and a seventh switch module K-N, one end of the fourth switch module K-K, one end of the fifth switch module K-M, one end of the sixth switch module K-L and one end of the seventh switch module K-N are connected, the other end of the fourth switch module K-K and the other end of the fifth switch module K-M are respectively connected with two electric load branches of a power supply system, the other end of the sixth switch module K-L is connected with a secondary of a new transformer T2, and the other end of the seventh switch module K-N is used as a second standby contact; the first spare contact and the second spare contact form a spare contact of the transformer. When the spare contact of the transformer is connected with a transformer, the first spare contact is connected with the primary side of the transformer, and the second spare contact is connected with the secondary side of the transformer.
The first switch module K-H is connected to a power grid, obtains power from the power grid, and is sent to a new transformer T2 through the second switch module K-J and is sent to a first standby connection point through the third switch module K-I. And the secondary side of the new transformer T2 transmits the converted power supply to an electric load branch circuit at the rear end of the main power supply circuit through the sixth switch module K-L, the fourth switch module K-K and the fifth switch module K-M in sequence to supply power to a user load. The first standby contact and the second standby contact can also be used for connecting a transformer, after the transformer T1 to be overhauled is disassembled, in order to ensure that a power supply system does not stop power when a new transformer T2 is transferred into a main power supply line, the transformer T1 to be overhauled can be temporarily connected with the first standby contact and the second standby contact correspondingly, so that in the process that the new transformer T2 is disassembled from the transformer replacing module and then is installed at the original position of the transformer T1 to be overhauled in the main power supply line, the transformer T1 to be overhauled continuously supplies power to a power load through the first standby contact and the second standby contact.
In this embodiment, the main power supply line includes a first overcurrent protection module K-a, a to-be-overhauled transformer T1, an eighth switch module, a plurality of ninth switch modules, and a plurality of second overcurrent protection modules, a primary of the to-be-overhauled transformer T1 is connected to a power grid through the first overcurrent protection module K-a, a secondary of the to-be-overhauled transformer T1 is connected in series with the eighth switch module and then divided into a plurality of power supply branches, and each power supply branch is connected in series with at least one ninth switch module (for example, K-D and K-E in the drawing) and at least one second overcurrent protection module (for example, K-F and K-G in the drawing) and then is connected with a plurality of electrical load branches in a one-to-one correspondence. The first overcurrent protection module K-A adopts a fuse type switch and is used for carrying out overcurrent protection on a main power supply line. The transformer to be overhauled T1 is connected with a fuse (namely a first overcurrent protection module K-A) in series and then is connected to a power grid, 10kV voltage of the power grid is converted, 0.4kV voltage is output from the secondary stage of the transformer to supply power for a rear-end electric load. The eighth switch module is used for controlling the secondary side of the transformer T1 to be overhauled to supply power to all the subsequent electric load branches, and in the process of replacing the transformer, the switch-off circuit breaker (K-C) and the isolating switch (K-B) use the bypass formed by the transformer replacing module and the new transformer T2 to supply power to all the subsequent electric load branches. The power input end of each electric load branch is respectively connected with a second overcurrent protection module through a group of ninth switch module and the second overcurrent protection module which are connected in series, the ninth switch module is used for controlling the power on-off of the electric load branch, and the second overcurrent protection module is used for performing overcurrent protection on the electric load branch, so that the situation that the rear-end electric equipment is burnt by overlarge current caused by faults such as short circuit is prevented.
As a preferred scheme, the eighth switch module is provided with a circuit breaker K-C connected in series with the isolating switch K-B in addition to the isolating switch K-B, and the isolating switch K-B is arranged adjacent to the transformer in the main power supply line and is used for providing a visual breakpoint for the transformer replacement process, so that the switch-on cannot be controlled by mistake in the operation process of replacing the transformer, and the safety of maintenance operation is ensured.
In general terms, the replacement of the transformer T1 to be repaired of the main power supply line by the transformer replacement module and the new transformer T2 at least needs to go through the following steps, which will be described with reference to the attached drawings.
S1, connecting a new transformer T2 with a transformer replacement module, connecting the transformer replacement module into a power grid and a power load branch circuit, and bypassing a main power supply circuit.
The specific operation steps in step S1 are:
s101, checking whether a transformer T1 to be replaced and a new transformer T2 meet parallel operation conditions or not; confirming that the states of all switch modules of the transformer replacement module are open-circuit states:
s102, connecting electrical connection points J-A and J-B between a transformer replacement module and a power grid access port (namely a high-voltage side of a line), connecting electrical connection points J-I and J-K between the transformer replacement module and an electric load branch 1 (namely a low-voltage side of the line), and connecting electrical connection points J-J and J-L between the transformer replacement module and an electric load branch 2 (namely a low-voltage side of the line); electrical connection points J-D and J-E between the transformer replacement module and the primary side of the new transformer T2 are connected, and electrical connection points J-F and J-G between the transformer replacement module and the secondary side of the new transformer T2 are connected.
S103, adjusting the states of all switch modules in the transformer replacement module as follows: the first switch module K-H, the second switch module K-J, the fourth switch module K-K and the sixth switch module K-L are switched on, and the third switch module K-I, the fifth switch module K-M and the seventh switch module K-N are switched off.
As shown in fig. 1, since the main power supply line is in an operating state at this time, the corresponding first overcurrent protection module K-a, the eighth switch module and the ninth switch module are switched on, and the transformer T1 to be overhauled and the new transformer T2 are both powered on to operate at this time, the purpose of bypassing the main power supply line through the transformer replacement module and the new transformer T2 is achieved.
S2, disconnecting the primary connection wire and the secondary connection wire of the transformer T1 to be overhauled in the main power supply line, and detaching the transformer T1 to be overhauled in the main power supply line.
The step S2 includes the following detailed operation steps:
s201, opening an eighth switch module and a ninth switch module in a main power supply circuit;
s202, disconnecting the primary connection wire and the secondary connection wire of the transformer T1 to be overhauled in the main power supply line, and detaching the transformer T1 to be overhauled.
In step S2, as shown in fig. 2, when the to-be-serviced transformer T1 in the main power supply line is disassembled, the states of the respective switch modules are: the first overcurrent protection module K-A, the eighth switch module, the ninth switch module, the third switch module K-I and the seventh switch module K-N are switched on, the first switch module K-H, the second switch module K-J, the fourth switch module K-K, the fifth switch module K-M and the sixth switch module K-L are switched on, at the moment, the transformer T1 to be overhauled is powered off and stops running, the new transformer T2 continues to be powered on and supplies power to a power load through the new transformer T2.
And S3, moving the transformer T1 to be overhauled to the transformer replacing module to be connected with the spare contact of the transformer replacing module, and connecting the transformer T1 to be overhauled in parallel with the new transformer T2 at the transformer replacing module to lap a new bypass.
In step S3, the following detailed operation steps are included:
s301, connecting a primary side of a transformer T1 to be overhauled with a first spare contact J-C of a transformer replacing module, and connecting a secondary side of the transformer T1 to be overhauled with the first spare contact J-H of the transformer replacing module;
s302, the third switch module K-I and the seventh switch module K-N are switched on, so that the transformer T1 to be overhauled and the new transformer T2 form a parallel circuit through a transformer replacing module.
In step S3, as shown in fig. 3, the to-be-overhauled transformer T1 is connected to form another bypass of the main power supply line by the backup contact of the transformer replacement module, and at this time, the bypass formed by the new transformer T2 and the new bypass formed by the to-be-overhauled transformer T1 operate in parallel to supply power to the electric load together.
And S4, disconnecting the new transformer T2 from the transformer replacement module, installing the new transformer T2 into a main power supply line, and connecting the new transformer T2.
In step S4, the following detailed operation steps are included:
s401, switching off the second switch module K-J and the sixth switch module K-L, disconnecting the electrical connection points J-D and J-E between the transformer replacing module and the primary side of the new transformer T2, and disconnecting the electrical connection points J-F and J-G between the transformer replacing module and the secondary side of the new transformer T2;
s402, moving the new transformer T2 to the position, where the transformer T1 to be overhauled is originally installed, in the main power supply line, connecting the primary side of the new transformer T2 with the first overcurrent protection module K-A, connecting the secondary side of the new transformer T2 with the eighth switch module, and then switching on the eighth switch module, the ninth switch module and the first overcurrent protection module K-A.
In step S4, as shown in fig. 4, during the process of removing the new transformer T2 from the transformer replacement module and installing the new transformer T2 into the main power supply line, the primary side of the transformer T1 to be serviced is maintained connected to the first backup contact on the third switch module K-I, the secondary side of the transformer T1 to be overhauled is connected with a second standby contact on a seventh switch module K-N, at the moment, the first switch module K-H, the third switch module K-I, the fourth switch module K-K, the fifth switch module K-M and the seventh switch module K-N are switched on, the second switch module K-J, the sixth switch module K-L, the eighth switch module and the ninth switch module are switched on, and at the moment, the transformer T1 to be overhauled is powered on through a transformer replacement module to operate, so that power is supplied to an electric load branch. When the new transformer T2 is installed in the main power supply line, the eighth switch module, the ninth switch module and the first overcurrent protection module K-A are switched on, and at the moment, the new main power supply line in which the new transformer T2 participates and the bypass in which the transformer T1 to be overhauled participates operate in parallel to supply power to the rear-end electric load branch. After the step, the positions of the new transformer T2 and the transformer T1 to be overhauled are exchanged on the premise of realizing no power failure.
And S5, sequentially disconnecting the transformer replacing module from the electric load branch, disconnecting the transformer replacing module from the power grid, and disconnecting the transformer replacing module from the transformer T1 to be maintained.
The detailed operation of step S5 is as follows:
s501, opening a fourth switch module K-K and a fifth switch module K-M in a switching-off transformer replacement module, disconnecting electrical connection points J-I and J-K between the transformer replacement module and an electric load branch 1 (namely a low-voltage side of a line), and disconnecting electrical connection points J-J and J-L between the transformer replacement module and an electric load branch 2 (namely a low-voltage side of the line), namely, disconnecting the transformer replacement module and the electric load branch;
s502, opening a first switch module K-H, and disconnecting electrical connection points J-A and J-B between a transformer replacement module and a power grid access port (namely, the high-voltage side of a line), namely, disconnecting the transformer replacement module from the power grid;
s503, switching off the second switch module K-J and the seventh switch module K-N, disconnecting the primary side of the transformer T1 to be overhauled and the first standby contact J-C of the transformer replacing module, and disconnecting the secondary side of the transformer T1 to be overhauled and the first standby contact J-H of the transformer replacing module, so that the connection between the transformer replacing module and the transformer T1 to be overhauled is released.
In step S4 a new transformer T2 has been replaced to the main supply line, step S5 is used to remove the bypass connection to the grid. As shown in fig. 5, after step S5, the transformer T1 to be repaired, the transformer replacement module, and the main power supply line are separated, and the transformer T1 to be repaired in the bypass is removed, so that the procedure of replacing the transformer T1 to be repaired in the power supply system is completed. At this time, the transformer T1 to be overhauled can be removed, so that the dismounted transformer T1 to be overhauled is convenient to overhaul.
It should be noted that, in any step, before each switching module is switched on to connect a certain transformer, it is required to detect whether the phase sequence at the two ends of the corresponding switching module is correct, and the switching module is switched on the premise that the phase sequence is correct.
The working principle is as follows:
when the transformer T1 to be overhauled in the main power supply line of this embodiment is overhauled, the transformer T1 to be overhauled needs to be replaced by the new transformer T2, and then the transformer T1 to be overhauled is overhauled. In order to ensure that each power utilization load branch does not stop power in the maintenance process, the transformer replacement module of the embodiment can be firstly used to be connected with a new transformer T2 to form a bypass, and the subsequent power utilization load is supplied with power through the bypass; after the transformer T1 to be overhauled is detached, in order to replace a new transformer T2 into a main power supply line, a transformer replacement module and the replaced transformer T1 to be overhauled form a second bypass, and the two bypasses run in parallel; when the two bypasses operate stably, the new transformer T2 in the bypass is detached and installed in the main power supply line, so that the new transformer T2 drives the main power supply line to operate; the second bypass is then removed, the transformer to be serviced T1 is removed, and the transformer to be serviced T1 can be removed for servicing. This embodiment has realized under the prerequisite that the power consumption load branch road of rear end does not have a power failure, accomplishes whole power supply system's new and old transformer and changes, has greatly reduced the loss that the power failure overhauld the transformer and brought.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. A power supply system for realizing complete uninterrupted power supply replacement of an on-column transformer comprises a main power supply line, wherein the main power supply line comprises a to-be-repaired transformer (T1) connected to a power grid and at least two power load branches arranged on the secondary side of the to-be-repaired transformer (T1), and is characterized by further comprising a new transformer (T2) and a transformer replacement module, wherein the transformer replacement module is detachably connected with the main power supply line and used for building a bypass of the to-be-repaired transformer (T1); the new transformer (T2) is connected with the transformer (T1) to be overhauled in parallel through the transformer replacing module and is used for supplying power to the electric load branch in the process of replacing the transformer (T1) to be overhauled; the transformer replacement module is provided with a group of transformer spare contacts connected with a new transformer (T2) in parallel, and after the group of transformer spare contacts are connected with one transformer, the transformer on the transformer spare contacts is connected with the new transformer (T2) in parallel.
2. The power supply system for realizing complete uninterrupted power supply replacement of the pole-mounted transformer is characterized in that the transformer replacement module comprises a transformer primary switch module and a transformer secondary switch module which are independent of each other, the transformer primary switch module comprises a first switch module (K-H), a second switch module (K-J) and a third switch module (K-I), one end of the first switch module (K-H), one end of the second switch module (K-J) and one end of the third switch module (K-I) are connected, the other end of the first switch module (K-H) is connected to a power grid, the other end of the second switch module (K-J) is connected to the primary of a new transformer (T2), and the other end of the third switch module (K-I) is used as a first standby junction; the transformer secondary switch module comprises a fourth switch module (K-K), a fifth switch module (K-M), a sixth switch module (K-L) and a seventh switch module (K-N), one end of the fourth switch module (K-K), one end of the fifth switch module (K-M), one end of the sixth switch module (K-L) and one end of the seventh switch module (K-N) are connected, the other end of the fourth switch module (K-K) and the other end of the fifth switch module (K-M) are respectively connected with two electric load branches of a power supply system, the other end of the sixth switch module (K-L) is connected with the secondary of a new transformer (T2), and the other end of the seventh switch module (K-N) is used as a second standby connection point; the first spare contact and the second spare contact form a spare contact of the transformer.
3. The power supply system for realizing complete replacement of the pole-mounted transformer without power outage as claimed in claim 2, wherein the main power supply line comprises a first overcurrent protection module (K-a), a to-be-repaired transformer (T1), an eighth switch module, a plurality of ninth switch modules and a plurality of second overcurrent protection modules, a primary side of the to-be-repaired transformer (T1) is connected to a power grid through the first overcurrent protection module (K-a), a secondary side of the to-be-repaired transformer (T1) is connected in series with the eighth switch module and then is divided into a plurality of power supply branches, and each power supply branch is connected in series with at least one ninth switch module and at least one second overcurrent protection module respectively and then is connected with a plurality of power utilization load branches in a one-to-one correspondence manner.
4. The power supply system for realizing complete uninterrupted power supply for replacing the pole-mounted transformer is characterized in that when a transformer to be repaired (T1) in a main power supply line is ready to be disassembled, the first switch module (K-H), the second switch module (K-J), the fourth switch module (K-K), the sixth switch module (K-L), the first overcurrent protection module (K-A), the eighth switch module and the ninth switch module are switched on, the third switch module (K-I), the fifth switch module (K-M) and the seventh switch module (K-N) are switched on, and the transformer to be repaired (T1) and a new transformer (T2) are powered on.
5. The power supply system for realizing the complete replacement of the pole-mounted transformer without power outage is characterized in that when a transformer (T1) to be repaired in a main power supply line is disassembled, the first overcurrent protection module (K-A), the eighth switch module, the ninth switch module, the third switch module (K-I) and the seventh switch module (K-N) are switched on, the first switch module (K-H), the second switch module (K-J), the fourth switch module (K-K), the fifth switch module (K-M) and the sixth switch module (K-L) are switched on, the transformer (T1) to be repaired is powered off and stops running, and the new transformer (T2) continues to be powered on.
6. The power supply system for realizing complete uninterrupted power supply for replacing the pole-mounted transformer according to claim 5, wherein when a new transformer (T2) is removed from the transformer replacement module and a new transformer (T2) is installed in the main power supply line, the primary side of the transformer to be repaired (T1) is connected with the first spare contact on the third switch module (K-I), the secondary side of the transformer to be repaired (T1) is connected with the second spare contact on the seventh switch module (K-N), and at the moment, the first switch module (K-H), the third switch module (K-I), the fourth switch module (K-K), the fifth switch module (K-M), and the seventh switch module (K-N) are closed, the second switch module (K-J), the sixth switch module (K-L), the first overcurrent protection module (K-A), the eighth switch module and the ninth switch module are opened, at the moment, the transformer to be overhauled (T1) is powered to operate through the transformer replacing module.
7. The power supply system for realizing complete uninterrupted power supply for replacing the pole-mounted transformer is characterized in that when the transformer (T1) to be repaired is removed from the transformer replacement module after a new transformer (T2) is installed in the main power supply line, the first overcurrent protection module (K-A), the eighth switch module and the ninth switch module are switched on, and the first switch module (K-H), the second switch module (K-J), the third switch module (K-I), the fourth switch module (K-K), the fifth switch module (K-M), the sixth switch module (K-L) and the seventh switch module (K-N) are switched off, wherein the new transformer (T2) is powered to operate in the main power supply line at the moment.
8. The power supply system for realizing complete uninterrupted power supply for replacing the transformer on the column according to any one of claims 3 to 7, wherein the eighth switch module comprises a disconnecting switch (K-B) and a circuit breaker (K-C) which are connected in series, and the disconnecting switch is arranged adjacent to the transformer and used for providing a visual breakpoint for the transformer replacement process.
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Effective date of registration: 20240417 Address after: 430000, No.1, 4th Floor, Building A8, Phase I of Rongke Zhigu Industrial Project, No. 555 Wenhua Avenue, Hongshan District, Wuhan City, Hubei Province Patentee after: Hubei Lineng Power Technology Co.,Ltd. Country or region after: China Address before: 430000 Floor 5-6 of Building A8, Phase I of Rongke Zhigu Industrial Project, 555 Cultural Avenue, Hongshan District, Wuhan City, Hubei Province Patentee before: WUHAN LEAD ELECTRIC POWER TECHNOLOGY Co.,Ltd. Country or region before: China |