Voltage paralleling device and power supply circuit
By connecting the voltage transformer in parallel and using relay control, the problem of equipment parking during voltage transformer maintenance is solved, ensuring the safety of the circuit and reducing operational risks.
Patent Information
- Application Number
- CN202323660143.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-12-29
AI Technical Summary
During the maintenance of the voltage transformer, some equipment is stopped, resulting in low voltage protection, high operating risks and easy to operate incorrectly, causing equipment to stop.
Design a voltage parallel device, by connecting the first voltage transformer and the second voltage transformer in parallel, and controlling the connection lines between the first relay and the second relay with a third relay, ensuring that when one transformer stops running, A transformer operates to prevent the equipment from being powered off.
It realizes that the equipment does not stop during the maintenance of the voltage transformer, reduces the operating risk, and ensures that all electrical equipment will not be powered off during the maintenance process.
Smart Images
Figure CN222215194U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of power supply circuits, and in particular to a voltage paralleling device and a power supply circuit. Background Art
[0002] In the existing voltage parallel device, two sections of PT trolley working positions are connected in series in the voltage parallel circuit. Once the PT leaves the working position, the voltage parallel device cannot complete the parallel connection, causing a section of the system PT secondary voltage to lose power, causing the low voltage protection to operate and the equipment to stop. During daily PT maintenance, it is necessary to exit the low voltage protection of all equipment in this section, which is a large workload and has a high operating risk. It is easy to make mistakes when the low voltage protection is exited, causing the equipment to stop. Utility Model Content
[0003] The main purpose of the present application is to provide a voltage paralleling device and a power supply circuit to solve the problem of partial equipment shutdown during voltage transformer maintenance in the prior art.
[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a voltage parallel device is provided, comprising: a bus circuit of section I, comprising a first voltage transformer and a plurality of first relays, wherein one end of the first voltage transformer is connected to a power supply, and the other end of the first voltage transformer is respectively connected to a plurality of the first relays, and the plurality of the first relays are used to control the power on and off of a plurality of electrical devices; a bus circuit of section II, comprising a second voltage transformer and a plurality of second relays, wherein one end of the second voltage transformer is connected to the power supply, and the other end of the second voltage transformer is respectively connected to a plurality of the second relays, and the plurality of the second relays are used to control the power on and off of a plurality of the electrical devices; a voltage parallel circuit, comprising a plurality of third relays, wherein one end of the plurality of the third relays is connected to a predetermined node, and one end of the third relay is connected to the first relay in a one-to-one correspondence, and the other end of the third relay is connected to the second relay in a one-to-one correspondence, and the predetermined node is a connection node between the other end of the first voltage transformer and the other end of the second voltage transformer.
[0005] Optionally, the third relay is arranged on a connection line between the corresponding first relay and the second relay, and the third relay corresponds to the first relay in a one-to-one manner, and the third relay corresponds to the second relay in a one-to-one manner.
[0006] Optionally, the voltage parallel circuit further includes: a parallel switch, which is arranged on a connection line between the predetermined node and the plurality of third relays, and the parallel switch is used to switch between a closed state and an open state.
[0007] Optionally, the parallel switch is a rotary switch, which includes a first end, a second end, a third end and a fourth end, the third end is connected to the predetermined node, the fourth end is respectively connected to multiple third relays, the open state is a state in which the first end and the second end are connected, and the closed state is a state in which the third end and the fourth end are connected.
[0008] Optionally, the I-section bus circuit includes multiple first voltage monitoring points and multiple second voltage monitoring points, the first voltage monitoring point is the corresponding terminal at one end of the first relay, the second voltage monitoring point is the corresponding terminal at the other end of the first relay, the first voltage monitoring point corresponds to the first relay one-to-one, and the second voltage monitoring point corresponds to the first relay one-to-one.
[0009] Optionally, the section II bus circuit includes multiple third voltage monitoring points and multiple fourth voltage monitoring points, the third voltage monitoring point is the corresponding terminal at one end of the second relay, the fourth voltage monitoring point is the corresponding terminal at the other end of the second relay, the third voltage monitoring point corresponds to the second relay one-to-one, and the fourth voltage monitoring point corresponds to the second relay one-to-one.
[0010] Optionally, the plurality of first voltage monitoring points are all wiring terminals at one end of one of the first relays, and the plurality of second voltage monitoring points are all wiring terminals at the other end of one of the first relays.
[0011] Optionally, the plurality of third voltage monitoring points are all wiring terminals at one end of a second relay, and the plurality of fourth voltage monitoring points are all wiring terminals at the other end of a second relay.
[0012] Optionally, the voltage paralleling device further includes: a bus tie switch, located on a connection line between the first voltage transformer and the power supply and located on a connection line between the second voltage transformer and the power supply.
[0013] According to another aspect of the present application, a power supply circuit is provided, comprising any one of the voltage parallel devices described above.
[0014] By applying the technical solution of the present application, in the above-mentioned voltage parallel device, the voltage parallel device controls the on and off of multiple third relays by connecting the first voltage transformer and the second voltage transformer in parallel, and the multiple third relays respectively control the on and off of the connection line between the first relay and the corresponding second relay, so that when one of the first voltage transformer and the second voltage transformer stops running, the first relay and the corresponding second relay are connected, so that all electrical equipment will not be powered off, that is, the first voltage transformer stops running, the second voltage transformer is running, the second relay and the third relay are energized, so that the first relay connected to the second relay is also energized, so that all electrical equipment will not be powered off, and vice versa, which solves the problem of some equipment stopping when the voltage transformer is maintained in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0016] Figure 1 A partial schematic diagram of a voltage parallel device according to an embodiment of the present application is shown;
[0017] Figure 2 A schematic diagram of a voltage parallel device according to an embodiment of the present application is shown. DETAILED DESCRIPTION
[0018] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.
[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0020] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element may be directly on the other element, or there may be intermediate elements. Moreover, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element, or "connected" to the other element through a third element.
[0021] As introduced in the background technology, in the prior art, some equipment is shut down during voltage transformer maintenance. In order to solve the above problem, the present application proposes a voltage parallel device and a power supply circuit.
[0022] Figure 1 A schematic diagram of a voltage parallel device according to an embodiment of the present application is shown, and the voltage parallel device comprises:
[0023] I-section bus circuit, including a first voltage transformer and a plurality of first relays J11, one end of the first voltage transformer is connected to a power source, and the other end of the first voltage transformer is respectively connected to the plurality of first relays J11, and the plurality of first relays J11 are used to control power on and off of a plurality of electrical devices;
[0024] The bus circuit of section II includes a second voltage transformer and a plurality of second relays J13, one end of the second voltage transformer is connected to the power supply, and the other end of the second voltage transformer is respectively connected to the plurality of second relays J13, and the plurality of second relays J13 are used to control the power on and off of the plurality of electrical devices;
[0025] The voltage parallel circuit includes a plurality of third relays J32, one ends of the plurality of third relays J32 are all connected to a predetermined node, and one ends of the third relays J32 are connected to the first relays J11 one-to-one, and the other ends of the third relays J32 are connected to the second relays J13 one-to-one, and the predetermined node is a connection node between the other ends of the first voltage transformer and the other ends of the second voltage transformer.
[0026] In the above-mentioned voltage parallel device, the voltage parallel device controls the on and off of multiple third relays by connecting the first voltage transformer and the second voltage transformer in parallel. The multiple third relays respectively control the on and off of the connection line between the first relay and the corresponding second relay, so that when one of the first voltage transformer and the second voltage transformer stops running, the first relay and the corresponding second relay are connected, so that all electrical equipment will not be powered off, that is, the first voltage transformer stops running, the second voltage transformer is running, the second relay and the third relay are energized, so that the first relay connected to the second relay is also energized, so that all electrical equipment will not be powered off, and vice versa, which solves the problem of some equipment stopping when the voltage transformer is maintained in the prior art.
[0027] In order to ensure voltage parallelism, in an optional implementation, the third relay is arranged on the connection line between the corresponding first relay and the second relay, and the third relay corresponds to the first relay one-to-one, and the third relay corresponds to the second relay one-to-one.
[0028] In the above implementation mode, if Figure 1 As shown, the third relay J32 is arranged on the connection line between the corresponding first relay J11 and the second relay J13, so as to control the on and off of the connection line between the corresponding first relay J11 and the second relay J13 respectively through a plurality of third relays J32 to realize voltage parallelization.
[0029] For ease of control, in an optional implementation, the voltage parallel circuit further includes:
[0030] A parallel switch is arranged on the connection line between the above-mentioned predetermined node and the plurality of the above-mentioned third relays, and the above-mentioned parallel switch is used to switch between a closed state and an open state.
[0031] In the above implementation, the above parallel switch is used to switch between a closed state and an open state, which can realize the opening and closing of the voltage parallel function, and is convenient for control.
[0032] For ease of control, in an optional implementation, Figure 2 As shown, the parallel switch is a rotary switch, which includes a first end, a second end, a third end and a fourth end, the third end is connected to the predetermined node, the fourth end is respectively connected to a plurality of the third relays, the open state is a state in which the first end and the second end are connected, and the closed state is a state in which the third end ③ and the fourth end ④ are connected.
[0033] In the above embodiment, the parallel switch is a rotary switch, which can be switched between a closed state and an open state by rotation, so as to facilitate confirmation of whether the voltage parallel function is turned on.
[0034] For circuit safety, in an optional implementation, the above-mentioned I-section bus circuit includes multiple first voltage monitoring points and multiple second voltage monitoring points, the above-mentioned first voltage monitoring points are corresponding to the wiring terminals at one end of the above-mentioned first relay, the above-mentioned second voltage monitoring points are corresponding to the wiring terminals at the other end of the above-mentioned first relay, the above-mentioned first voltage monitoring points correspond one-to-one with the above-mentioned first relay, and the above-mentioned second voltage monitoring points correspond one-to-one with the above-mentioned first relay.
[0035] In the above implementation, the first voltage monitoring point and the second voltage monitoring point are the connection terminals at both ends of the first relay, for example, Figure 1 P1-9 and P1-5, that is, the first voltage monitoring point and the second voltage monitoring point, monitor the voltages at both ends of the corresponding first relay to ensure circuit safety.
[0036] For circuit safety, in an optional implementation, the above-mentioned section II bus circuit includes multiple third voltage monitoring points and multiple fourth voltage monitoring points, the above-mentioned third voltage monitoring points are corresponding to the wiring terminals at one end of the above-mentioned second relay, the above-mentioned fourth voltage monitoring points are corresponding to the wiring terminals at the other end of the above-mentioned second relay, the above-mentioned third voltage monitoring points correspond one-to-one with the above-mentioned second relays, and the above-mentioned fourth voltage monitoring points correspond one-to-one with the above-mentioned second relays.
[0037] In the above implementation, the third voltage monitoring point and the fourth voltage monitoring point are the connection terminals at both ends of the second relay, for example, Figure 1 P1-13 and P1-17, i.e., the third voltage monitoring point and the fourth voltage monitoring point, monitor the voltages at both ends of the corresponding second relay to ensure circuit safety.
[0038] In order to save terminals, in an optional implementation, the plurality of first voltage monitoring points are all wiring terminals at one end of one of the first relays, and the plurality of second voltage monitoring points are all wiring terminals at the other end of one of the first relays.
[0039] In the above implementation, one end of the plurality of first relays shares one wiring terminal, and the other end of the plurality of first relays shares one wiring terminal, so that the number of occupied terminals can be reduced.
[0040] In order to save terminals, in an optional implementation, the plurality of third voltage monitoring points are all connection terminals at one end of the second relay, and the plurality of fourth voltage monitoring points are all connection terminals at the other end of the second relay.
[0041] In the above implementation, one ends of the plurality of second relays share one wiring terminal, and the other ends of the plurality of second relays share one wiring terminal, so that the number of occupied terminals can be reduced.
[0042] For circuit safety, in an optional implementation, Figure 2 As shown, the voltage parallel device further includes:
[0043] The bus tie switch is located on the connection line between the first voltage transformer and the power supply and on the connection line between the second voltage transformer and the power supply.
[0044] In the above implementation, the bus tie switch serves as a main voltage switch and can cut off power to the entire circuit in the event of an accident to prevent the accident from expanding.
[0045] According to another aspect of the present application, a power supply circuit is provided, comprising any one of the above-mentioned voltage parallel devices.
[0046] The above-mentioned power supply circuit includes a voltage parallel device, which controls the on and off of multiple third relays by connecting the first voltage transformer and the second voltage transformer in parallel. The multiple third relays respectively control the on and off of the connection line between the first relay and the corresponding second relay, so that when one of the first voltage transformer and the second voltage transformer stops running, the first relay and the corresponding second relay are connected, so that all electrical equipment will not be powered off, that is, the first voltage transformer stops running, the second voltage transformer is running, the second relay and the third relay are energized, so that the first relay connected to the second relay is also energized, so that all electrical equipment will not be powered off, and vice versa, which solves the problem of some equipment stopping when the voltage transformer is maintained in the prior art.
[0047] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:
[0048] 1) In the voltage parallel device of the present application, the voltage parallel device controls the on and off of multiple third relays by connecting the first voltage transformer and the second voltage transformer in parallel. The multiple third relays respectively control the on and off of the connection line between the first relay and the corresponding second relay, so that when one of the first voltage transformer and the second voltage transformer stops running, the first relay and the corresponding second relay are connected, so that all electrical equipment will not be powered off, that is, the first voltage transformer stops running, the second voltage transformer is running, the second relay and the third relay are energized, so that the first relay connected to the second relay is also energized, so that all electrical equipment will not be powered off, and vice versa, which solves the problem of some equipment stopping when the voltage transformer is maintained in the prior art.
[0049] 2) The power supply circuit of the present application includes a voltage parallel device, which controls the on and off of multiple third relays by connecting the first voltage transformer and the second voltage transformer in parallel. The multiple third relays respectively control the on and off of the connection line between the first relay and the corresponding second relay, so that when one of the first voltage transformer and the second voltage transformer stops running, the first relay and the corresponding second relay are connected, so that all electrical equipment will not be powered off, that is, the first voltage transformer stops running, the second voltage transformer is running, the second relay and the third relay are energized, so that the first relay connected to the second relay is also energized, so that all electrical equipment will not be powered off, and vice versa, which solves the problem of some equipment stopping during voltage transformer maintenance in the prior art.
[0050] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A voltage parallel device, characterized in that: include: A bus circuit section I includes a first voltage transformer and a plurality of first relays, wherein one end of the first voltage transformer is connected to a power source, and the other end of the first voltage transformer is respectively connected to a plurality of the first relays, and the plurality of the first relays are used to control power on and off of a plurality of electrical devices; The bus circuit of section II includes a second voltage transformer and a plurality of second relays, one end of the second voltage transformer is connected to the power supply, and the other end of the second voltage transformer is respectively connected to the plurality of second relays, and the plurality of second relays are used to control the power on and off of the plurality of electrical devices; A voltage parallel circuit includes multiple third relays, one end of each of the multiple third relays is connected to a predetermined node, and one end of each of the third relays is connected to the first relay in a one-to-one correspondence, and the other end of each of the third relays is connected to the second relay in a one-to-one correspondence, and the predetermined node is the connection node of the other end of the first voltage transformer and the other end of the second voltage transformer.
2. The device according to claim 1, characterized in that The third relay is arranged on a connection line between the corresponding first relay and the second relay, and the third relay corresponds to the first relay in a one-to-one manner, and the third relay corresponds to the second relay in a one-to-one manner.
3. The device according to claim 1, characterized in that The voltage parallel circuit also includes: A parallel switch is arranged on a connection line between the predetermined node and the plurality of third relays, and the parallel switch is used to switch between a closed state and an open state.
4. The device according to claim 3, characterized in that The parallel switch is a rotary switch, which includes a first end, a second end, a third end and a fourth end, the third end is connected to the predetermined node, the fourth end is respectively connected to multiple third relays, the open state is a state where the first end and the second end are connected, and the closed state is a state where the third end and the fourth end are connected.
5. The device according to claim 1, characterized in that The I-section bus circuit includes multiple first voltage monitoring points and multiple second voltage monitoring points, the first voltage monitoring points are corresponding to the wiring terminals at one end of the first relay, the second voltage monitoring points are corresponding to the wiring terminals at the other end of the first relay, the first voltage monitoring points correspond one-to-one to the first relays, and the second voltage monitoring points correspond one-to-one to the first relays.
6. The device according to claim 1, characterized in that The section II bus circuit includes multiple third voltage monitoring points and multiple fourth voltage monitoring points, the third voltage monitoring points are the corresponding wiring terminals at one end of the second relay, the fourth voltage monitoring points are the corresponding wiring terminals at the other end of the second relay, the third voltage monitoring points correspond one-to-one to the second relays, and the fourth voltage monitoring points correspond one-to-one to the second relays.
7. The device according to claim 5, characterized in that The plurality of first voltage monitoring points are all wiring terminals at one end of one of the first relays, and the plurality of second voltage monitoring points are all wiring terminals at the other end of one of the first relays.
8. The device according to claim 6, characterized in that The plurality of third voltage monitoring points are all wiring terminals at one end of the second relay, and the plurality of fourth voltage monitoring points are all wiring terminals at the other end of the second relay.
9. The device according to any one of claims 1 to 8, characterized in that The voltage parallel device also includes: A bus tie switch is located on a connection line between the first voltage transformer and the power supply and on a connection line between the second voltage transformer and the power supply.
10. A power supply circuit, characterized in that: The invention comprises the voltage paralleling device according to any one of claims 1 to 9.