Synchronous parallel operation control device and low-voltage power distribution system

Abstract

The utility model relates to a synchronous parallel operation control device and a low-voltage power distribution system. The synchronous parallel operation control device comprises a control module, a first incoming line switch control circuit, a second incoming line switch control circuit and a bus switch control circuit, the control module is used for determining the closing state of the first incoming line switch, the second incoming line switch and the bus switch according to the voltage parameters of the first incoming line cabinet and the second incoming line cabinet. And the first incoming line switch, the second incoming line switch and the bus switch are controlled through the first incoming line switch control circuit, the second incoming line switch control circuit and the bus switch control circuit. According to the invention, when a certain power supply of the power distribution system fails, automatic switching between power supplies can be realized, so that personal safety of operators is ensured, misoperation is avoided, power utilization reliability is greatly improved, power utilization quality of a user side and property safety of a user are ensured, and power utilization efficiency is improved. And the current situation of long-time power failure due to power failure is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage two-incoming-line-one-busbar synchronous parallel operation systems, and in particular to a synchronous parallel operation control device and a low-voltage power distribution system. Background Art

[0002] With the rapid development of industrial automation and intelligence, the complexity of industrial electricity consumption is increasing day by day, and reliability is increasingly attracting the attention of electricity users.

[0003] At present, the low-voltage power distribution field mostly adopts the wiring scheme of two incoming lines and one bus tie. The two incoming line cabinets and one bus tie cabinet that serve as backup for each other adopt a "three-in-two" logical relationship. That is to say, during operation, only any two circuit breakers are allowed to be closed and operated, and the function of closing and operating three circuit breakers at the same time cannot be realized. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a synchronous parallel operation control device and a low-voltage power distribution system that can realize the simultaneous operation of the incoming cabinet and the busbar cabinet. The specific scheme is as follows:

[0005] In a first aspect, this embodiment provides a synchronous parallel operation control device, including: a control module, a first incoming line switch control circuit, a second incoming line switch control circuit and a bus switch control circuit;

[0006] The first incoming line switch control circuit, the second incoming line switch control circuit and the bus switch control circuit are all connected to the control module;

[0007] The first incoming switch control circuit is used to control the closing state of the first incoming switch arranged in the first incoming cabinet, the second incoming switch control circuit is used to control the closing state of the second incoming switch arranged in the second incoming cabinet, and the bus switch control circuit is used to control the closing state of the bus switch arranged in the bus coupling cabinet;

[0008] The control module is used to determine the closing state of the first incoming line switch, the second incoming line switch and the bus switch according to the voltage parameters of the first incoming line cabinet and the second incoming line cabinet, and control the first incoming line switch, the second incoming line switch and the bus switch through the first incoming line switch control circuit, the second incoming line switch control circuit and the bus switch control circuit.

[0009] In one of the embodiments, it further includes: a first transfer switch, wherein the first transfer switch is arranged in the mother coupling cabinet;

[0010] When the first conversion switch is in the first state, the control module enters the automatic control mode, and is used to automatically control the first incoming line switch, the second incoming line switch and the bus switch to perform switching actions according to the voltage parameter;

[0011] When the first conversion switch is in the second state, the control module enters a manual control mode, and is used to send prompt information to a preset terminal according to the voltage parameter.

[0012] In one embodiment, it further includes: a second transfer switch, the second transfer switch is arranged in the mother coupling cabinet;

[0013] When the first conversion switch is in the first state and the second conversion switch is in the first state, the control module enters the automatic switching and automatic recovery control mode, and is used to automatically control the first incoming line switch, the second incoming line switch or the bus switch to perform switching actions when the two incoming line voltages are normal, the two incoming line voltages are abnormal, and the two incoming line voltages are restored;

[0014] When the first conversion switch is in the first state and the second conversion switch is in the second state, the control module enters the self-resetting control mode, which is used to automatically control the first incoming line switch, the second incoming line switch or the bus switch to perform switching actions when the two incoming line voltages are normal or abnormal.

[0015] In one of the embodiments, the voltage parameter includes a first incoming line voltage parameter and a second incoming line voltage parameter;

[0016] If the first incoming line voltage parameter and the second incoming line voltage parameter both belong to the preset voltage range, the first incoming line switch control circuit, the second incoming line switch control circuit and the bus switch control circuit control the first transfer switch, the second transfer switch and the bus switch to be closed according to the closing instruction sent by the control module;

[0017] If the first incoming line voltage parameter or the second incoming line voltage parameter does not fall within the preset voltage range, the first incoming line switch control circuit, the second incoming line switch control circuit and the bus switch control circuit control the first transfer switch, the second transfer switch and two of the bus switches to close according to the closing instruction sent by the control module.

[0018] In one of the embodiments, the busbar cabinet includes a first busbar section and a second busbar section;

[0019] The first incoming line cabinet is connected to the first bus section via the first incoming line switch, the second incoming line cabinet is connected to the second bus section via the second incoming line switch, and the first bus section is connected to the second bus section via the bus switch.

[0020] In one embodiment, the first incoming line switch control circuit includes a phase sequence relay, the second incoming line switch control circuit includes a phase sequence relay, and the bus switch control circuit includes a synchronous relay.

[0021] In one of the embodiments, the phase sequence relay and the synchronous relay are both connected to the control module, and the control module is used to obtain the first incoming line voltage parameter and the second incoming line voltage parameter through the synchronous relay.

[0022] In one embodiment, the control module includes a programmable logic controller.

[0023] In a second aspect, the present embodiment provides a low-voltage power distribution system, including a first incoming line cabinet, a second incoming line cabinet, a busbar cabinet, and the synchronous parallel operation control device described in the first aspect;

[0024] The first incoming line cabinet includes a first incoming line switch, the second incoming line cabinet includes a second incoming line switch, and the busbar cabinet includes a busbar switch.

[0025] In summary, the present application provides a synchronous parallel operation control device and a low-voltage power distribution system, including: a control module, a first incoming line switch control circuit, a second incoming line switch control circuit and a bus switch control circuit; the control module is used to determine the closed state of the first incoming line switch, the second incoming line switch and the bus switch according to the voltage parameters of the first incoming line cabinet and the second incoming line cabinet, and control the first incoming line switch, the second incoming line switch and the bus switch through the first incoming line switch control circuit, the second incoming line switch control circuit and the bus switch control circuit. The present application can realize automatic switching between power supplies when a power supply in the power distribution system fails, ensuring the personal safety of the operating personnel while avoiding erroneous operations, greatly improving the reliability of power use, ensuring the power quality at the user end and the property safety of the user, and effectively solving the current situation of long-term power outages due to power failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a module schematic diagram of a synchronous parallel operation control device in an embodiment;

[0028] Figure 2It is a module schematic diagram of a synchronous parallel operation control device in another embodiment;

[0029] Figure 3 Schematic diagram of the system structure of a low-voltage power distribution system in an embodiment.

[0030] Summary of reference numerals:

[0031] Control module-110; programmable logic controller-111; first incoming line switch control circuit-120; phase sequence relay A-121; second incoming line switch control circuit-130; phase sequence relay B-131; bus switch control circuit-140; synchronous relay-141; first incoming line cabinet-200; second incoming line cabinet-300; bus coupling cabinet-400. DETAILED DESCRIPTION

[0032] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0034] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0035] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0036] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least part of an element” means part or all of an element.

[0037] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0038] like Figure 1 As shown, this embodiment provides a synchronous parallel operation control device, which is applied to a low-voltage power distribution system. The synchronous parallel operation control device includes a control module 110, a first incoming line switch control circuit 120, a second incoming line switch control circuit 130 and a bus switch control circuit 140.

[0039] The first incoming line switch control circuit 120, the second incoming line switch control circuit 130 and the bus switch control circuit 140 are all connected to the control module 110. Specifically, the control module 110 includes a pre-configured control program, and the control module 110 determines whether to control the closed state of the corresponding switch through each control circuit according to the detected line voltage parameters of the first incoming line cabinet, the second incoming line cabinet and the bus coupling cabinet.

[0040] The first incoming line switch control circuit 120 is used to control the closing state of the first incoming line switch arranged in the first incoming line cabinet, the second incoming line switch control circuit 130 is used to control the closing state of the second incoming line switch arranged in the second incoming line cabinet, and the bus switch control circuit 140 is used to control the closing state of the bus switch arranged in the bus coupling cabinet.

[0041] Specifically, the control module 110 in this embodiment can obtain the voltage parameters of the incoming end of the first incoming cabinet through the first incoming switch control circuit 120, control the closing state of the first incoming switch through the first incoming switch control circuit 120, obtain the voltage parameters of the incoming end of the second incoming cabinet through the second incoming switch control circuit 130, control the closing state of the second incoming switch through the second incoming switch control circuit 130, obtain the voltage parameters of the bus end of the bus coupling cabinet through the bus switch control circuit 140, and control the closing state of the bus switch through the bus switch control circuit 140.

[0042] In actual application, the first incoming line switch is set between the voltage output end of the first incoming line cabinet and the bus cabinet, the second incoming line switch is set between the voltage output end of the second incoming line cabinet and the bus cabinet, and the bus switch is set between the multiple bus sections inside the bus cabinet.

[0043] It should be noted that the circuit connection scheme of the first incoming line cabinet, the second incoming line cabinet and the bus coupling cabinet in this embodiment can refer to the existing two-incoming line and one-bus coupling distribution system connection scheme. This embodiment does not limit the specific circuits inside the first incoming line cabinet, the second incoming line cabinet and the bus coupling cabinet, and can be adaptively designed based on the needs of actual application scenarios.

[0044] The control module 110 is used to determine the closing state of the first incoming switch, the second incoming switch and the bus switch according to the voltage parameters of the first incoming cabinet and the second incoming cabinet, and control the first incoming switch, the second incoming switch and the bus switch through the first incoming switch control circuit 120, the second incoming switch control circuit 130 and the bus switch control circuit 140.

[0045] Specifically, the control module collects the voltage parameters of the incoming line end and the bus voltage parameters at both ends of the busbar cabinet, performs preset parameter judgment, and controls the closing state of the first incoming line switch, the second incoming line switch and the busbar switch, so that the low-voltage power distribution system can automatically close and disconnect according to the actual voltage parameters, without the need for personnel to make auxiliary judgments, avoiding the possibility of personnel operating errors, and greatly improving the reliability of power use. In addition, this embodiment can directly and automatically realize the function of closing and operating three switches at the same time, greatly improving the reliability of system operation and avoiding the occurrence of power outages.

[0046] In one embodiment, it further includes: a first conversion switch, which is arranged in the mother coupling cabinet. Specifically, the first conversion switch is a manual / automatic control mode conversion switch. When the first conversion switch is tilted to one side, the control module 110 performs switch control according to the program corresponding to the automatic control mode. When the first conversion switch is tilted to the other side, the control module 110 performs switch control according to the program corresponding to the manual control mode.

[0047] It should be noted that the present embodiment does not limit the specific type of the first conversion switch. For example, the first conversion switch may be a push switch or a guillotine switch. In addition, the automatic control mode and the manual control mode of the first conversion switch adjustment control module 110 may be realized by connecting or disconnecting the circuit. The present embodiment does not specifically limit the setting method of the first conversion switch.

[0048] In a specific embodiment, when the first conversion switch is in the first state, the control module 110 enters the automatic control mode, and is used to automatically control the first incoming line switch, the second incoming line switch and the bus switch to perform switching actions according to the voltage parameters.

[0049] In actual application, the first state is the state when the first conversion switch is turned to the automatic control mode side. At this time, the control module 110 can obtain the voltage parameters of the incoming end and the bus end through the first incoming switch control circuit 120, the second incoming switch control circuit 130 and the bus switch control circuit 140, and determine the closing state of each switch according to the voltage parameters, and generate corresponding switching instructions to control each switch to perform switching actions through the first incoming switch control circuit 120, the second incoming switch control circuit 130 and the bus switch control circuit 140.

[0050] When the first conversion switch is in the second state, the control module 110 enters a manual control mode, and is used to send prompt information to a preset terminal according to the voltage parameter.

[0051] Specifically, the second state is the state when the first conversion switch turns to the manual control mode side. At this time, the control module 110 cannot realize automatic control of the switch, but the control module 110 can still obtain the voltage parameters of the incoming line end and the bus end through the first incoming line switch control circuit 120, the second incoming line switch control circuit 130 and the bus switch control circuit 140. The control module 110 sends the voltage parameters to the preset terminal so that the staff can perform switch processing on each switch in the power distribution system based on the voltage parameters displayed on the preset terminal.

[0052] It should be noted that the present embodiment does not limit the specific type of the preset terminal, and a suitable display terminal, such as a computer, a mobile terminal, etc., can be selected according to the needs of the actual application scenario.

[0053] In one embodiment, it further includes: a second conversion switch, which is arranged in the mother coupling cabinet. Specifically, the second conversion switch is a self-throwing and self-restoring / self-throwing and hand-recovering mode conversion switch, and the second conversion switch is effective only when the first switch is in the first state, that is, the control module 110 is in the automatic control mode. When the second conversion switch falls to one side, the control module 110 controls each switch according to the procedure of the self-throwing and self-restoring control mode. When the second conversion switch falls to the other side, the control mode controls each switch according to the procedure of the self-throwing and hand-recovering mode.

[0054] It should be noted that this embodiment also does not limit the type of the second transfer switch, and the second transfer switch can be configured in the mother coupling cabinet according to the needs of the actual application scenario.

[0055] Specifically, when the first conversion switch is in the first state and the second conversion switch is in the first state, the control module 110 enters the automatic investment and self-recovery control mode, which is used to automatically control the first incoming line switch, the second incoming line switch or the bus switch to perform switching actions when the two incoming line voltages are normal, the two incoming line voltages are abnormal, and the two incoming line voltages are restored.

[0056] In actual application scenarios, when the control module 110 is in the automatic switching and self-restoring control mode, the first conversion switch is turned to the automatic control mode side, and the second conversion switch is turned to the automatic switching and self-restoring control mode side. When the incoming voltages of the first incoming cabinet and the second incoming cabinet are normal, the control module 110 can determine whether to close all switches based on the voltage parameters to improve the power supply reliability of the distribution system. When the incoming voltage of any incoming cabinet is abnormal, the control module 110 sends a trip command to the corresponding incoming switch after a certain delay, and closes the bus switch, thereby ensuring the normal power supply of the distribution system while disconnecting the abnormal side incoming cabinet, so that the distribution system enters the "three-in-two" state. When any abnormal incoming cabinet is powered on again, the control module 110 delays a certain time to automatically open the bus switch, and then closes the incoming switch on the corresponding re-powered incoming cabinet side, so as to facilitate normal power supply of the distribution system.

[0057] Specifically, the synchronous parallel operation control device provided in this embodiment can automatically control the first incoming line switch, the second incoming line switch and the bus switch to perform switch closing actions when the two incoming line voltages are normal, the two incoming line voltages are abnormal, and the two incoming line voltages are restored, thereby effectively improving the power supply reliability of the distribution system and realizing fully automatic control of the distribution system.

[0058] Specifically, when the first conversion switch is in the first state and the second conversion switch is in the second state, the control module 110 enters the self-resetting control mode, which is used to automatically control the first incoming line switch, the second incoming line switch or the bus switch to perform switching actions when the two incoming line voltages are normal or abnormal.

[0059] In actual application, since the incoming power supply, that is, the incoming cabinet, is in the process of abnormal recovery, it is necessary to determine that the incoming power supply is fully restored before putting it into use to ensure the safety of the power distribution system. The control module 110 is also configured with an automatic hand-over control mode. When the first conversion switch is turned to the automatic control mode side and the second conversion switch is turned to the automatic hand-over control mode side, the control module 110 enters the automatic hand-over control mode. When the two incoming line voltages are working normally and any of the incoming line voltages is abnormal, the control method of the control module 110 is consistent with the control method in the aforementioned embodiment, which will not be repeated here.

[0060] When any abnormal incoming line voltage is restored to power supply, the control module 110 no longer automatically controls the switch to perform the switching action, but needs to determine the incoming line power recovery status, and then determine whether the incoming line power can be put into use according to the actual working conditions, and manually operate the first incoming line switch, the second incoming line switch or the bus switch. This embodiment can avoid frequent switching of power supplies by setting a self-throwing mode, and operate the power distribution system based on the person's determination that the incoming line power is fully restored, so as to ensure the operating reliability of the power distribution system.

[0061] In one of the embodiments, the voltage parameter includes a first incoming line voltage parameter and a second incoming line voltage parameter;

[0062] If the first incoming line voltage parameter and the second incoming line voltage parameter both belong to the preset voltage range, the first incoming line switch control circuit 120, the second incoming line switch control circuit 130 and the bus switch control circuit 140 control the first transfer switch, the second transfer switch and the bus switch to be closed according to the closing instruction sent by the control module 110;

[0063] If the first incoming line voltage parameter or the second incoming line voltage parameter does not fall within the preset voltage range, the first incoming line switch control circuit 120, the second incoming line switch control circuit 130 and the bus switch control circuit 140 control the closure of two of the first transfer switch, the second transfer switch and the bus switch according to the closing instruction sent by the control module 110.

[0064] In a specific embodiment, the voltage parameters also include the voltage parameters of the busbars at each end of the bus coupling cabinet. During the comparison process, the present embodiment can detect two different power supply waveforms and voltage parameters such as phase angles through the synchronous relay 141. When and only when the voltage parameters are within the preset voltage range, the first incoming line switch, the second incoming line switch and the busbar switch are controlled to close, thereby improving the operating reliability of the distribution system.

[0065] When any incoming line voltage parameter does not fall within the preset voltage range, it indicates that the incoming line cabinet on that side has a power supply abnormality. At this time, it is necessary to disconnect the incoming line switch on that side and close the incoming line switch and bus switch on the other side. That is, control two switches among the first conversion switch, the second conversion switch and the bus switch to close.

[0066] It should be noted that the present embodiment does not specifically limit the preset voltage range, and can be configured according to the needs of actual application scenarios. When setting the preset voltage range, it can be determined by referring to the real-time value of the voltage parameter.

[0067] In one of the embodiments, the busbar cabinet includes a first busbar section and a second busbar section;

[0068] The first incoming line cabinet is connected to the first bus section through the first incoming line switch, the second incoming line cabinet is connected to the second bus section through the second incoming line switch, and the first bus section is connected to the second bus section through the bus switch.

[0069] In a specific embodiment, Figure 2 As shown, the busbar coupling cabinet includes a first busbar section and a second busbar section, wherein the first busbar section is the busbar section located on the left side of the busbar switch QF3, and the second busbar section is the busbar section located on the right side of the busbar switch QF3.

[0070] It should be noted that the first incoming switch QF1 of the first incoming cabinet connects the incoming end of the first incoming cabinet with the first bus section, and the second incoming switch QF2 of the second incoming cabinet connects the incoming end of the second cabinet with the second bus section.

[0071] In one embodiment, if Figure 2 As shown, the first incoming line switch control circuit 120 includes a phase sequence relay, the second incoming line switch control circuit 130 includes a phase sequence relay, and the bus switch control circuit 140 includes a synchronous relay 141.

[0072] Specifically, the phase sequence relay 121 and the phase sequence relay 131 in this embodiment can both be a phase sequence comparator composed of an op amp, which is used to compare the phase sequence voltage amplitude, frequency and phase. In this embodiment, the incoming line voltage of the first incoming line cabinet can be collected through the phase sequence relay 121, and the incoming line voltage of the second incoming line cabinet can be collected through the phase sequence relay 131.

[0073] The synchronous relay 141 in this embodiment can collect information such as current and voltage of the first incoming line cabinet, the second incoming line cabinet and the busbar cabinet, and monitor the operation status of the power distribution system through information such as current and voltage. When a short circuit, overload, undervoltage or overvoltage fault occurs on any incoming line side of the power distribution system, the control module 110 is promptly sent an instruction to disconnect the corresponding incoming line switch or busbar switch to ensure the safe and stable operation of the power distribution system. It should be noted that the synchronous relay 141 in this embodiment can be composed of one unit or multiple units, and each unit contains multiple protection functions.

[0074] In one embodiment, the phase sequence relay and the synchronous relay 141 are both connected to the control module 110 , and the control module 110 is used to obtain the first incoming line voltage parameter and the second incoming line voltage parameter through the synchronous relay 141 .

[0075] In a specific embodiment, the synchronous relay 141 can detect two power supply waveforms, which correspond to the first incoming line voltage parameter and the second incoming line voltage parameter respectively.

[0076] In this embodiment, the control module 110 is connected with the phase sequence relay 121, the phase sequence relay 131 and the synchronous relay 141. The control module 110 can collect the voltage parameters of the first incoming cabinet, the second incoming cabinet and the main coupling cabinet through each relay, and determine the switching state of each switch based on the voltage parameters.

[0077] In one embodiment, the control module 110 includes a programmable logic controller 111 (PLC for short).

[0078] It should be noted that the present embodiment can use a PLC controller and associated circuits as the control module 110. Among them, the PLC controller has strong reliability and anti-interference ability, a small size, and has the advantages of simple programming logic and simple maintenance. At the same time, it is cheaper than the relay combination. Therefore, the synchronous parallel operation control device proposed in this embodiment can also effectively reduce the cost of the control equipment of the distribution system.

[0079] It can be understood that the above-mentioned control module 110 can also adopt other forms, not limited to the forms mentioned in the above embodiments, as long as it can complete the function of collecting the voltage parameters obtained by the synchronous relay 141 and automatically controlling the first incoming line switch, the second incoming line switch and the bus switch based on the voltage parameters.

[0080] In summary, this embodiment proposes a synchronous parallel operation control device, which can not only realize the "three-in-two" logic control of the two-incoming line and one-bus low-voltage power distribution system, but also automatically control all switches to close and operate simultaneously under certain circumstances, greatly improving the operational reliability of the low-voltage power distribution system. And the synchronous parallel operation control device proposed in this embodiment can also realize the functions of parallel operation and separate operation of two mains power. When any of the incoming line cabinets is abnormal, it can automatically respond in time without human operation, which greatly improves the fault response speed and further improves the operational reliability of the low-voltage power distribution system.

[0081] like Figure 3 As shown, this embodiment provides a low-voltage power distribution system, including a first incoming line cabinet 200, a second incoming line cabinet 300, a busbar cabinet 400, and the synchronous parallel operation control device in the above-mentioned embodiment;

[0082] The first incoming line cabinet 200 includes a first incoming line switch, the second incoming line cabinet 300 includes a second incoming line switch, and the busbar cabinet 400 includes a busbar switch.

[0083] It should be noted that the specific structure of the low-voltage power distribution system in this embodiment can refer to the description in the aforementioned embodiment, and the specific implementation method of the synchronous parallel operation control device in this embodiment can refer to the description in the aforementioned embodiment, which will not be repeated here.

[0084] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0085] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A synchronous parallel operation control device, characterized in that: include: A control module, a first incoming line switch control circuit, a second incoming line switch control circuit and a bus switch control circuit; The first incoming line switch control circuit, the second incoming line switch control circuit and the bus switch control circuit are all connected to the control module; The first incoming switch control circuit is used to control the closing state of the first incoming switch arranged in the first incoming cabinet, the second incoming switch control circuit is used to control the closing state of the second incoming switch arranged in the second incoming cabinet, and the bus switch control circuit is used to control the closing state of the bus switch arranged in the bus coupling cabinet; The control module is used to determine the closing state of the first incoming line switch, the second incoming line switch and the bus switch according to the voltage parameters of the first incoming line cabinet and the second incoming line cabinet, and control the first incoming line switch, the second incoming line switch and the bus switch through the first incoming line switch control circuit, the second incoming line switch control circuit and the bus switch control circuit.

2. The device according to claim 1, characterized in that Also includes: A first transfer switch, wherein the first transfer switch is arranged in the mother coupling cabinet; When the first conversion switch is in the first state, the control module enters the automatic control mode, and is used to automatically control the first incoming line switch, the second incoming line switch and the bus switch to perform switching actions according to the voltage parameter; When the first conversion switch is in the second state, the control module enters a manual control mode, and is used to send prompt information to a preset terminal according to the voltage parameter.

3. The device according to claim 2, characterized in that Also includes: A second transfer switch, wherein the second transfer switch is arranged in the mother coupling cabinet; When the first conversion switch is in the first state and the second conversion switch is in the first state, the control module enters the automatic switching and automatic recovery control mode, and is used to automatically control the first incoming line switch, the second incoming line switch or the bus switch to perform switching actions when the two incoming line voltages are normal, the two incoming line voltages are abnormal, and the two incoming line voltages are restored; When the first conversion switch is in the first state and the second conversion switch is in the second state, the control module enters the self-resetting control mode, which is used to automatically control the first incoming line switch, the second incoming line switch or the bus switch to perform switching actions when the two incoming line voltages are normal or abnormal.

4. The device according to claim 3, characterized in that The voltage parameters include a first incoming line voltage parameter and a second incoming line voltage parameter; If the first incoming line voltage parameter and the second incoming line voltage parameter both belong to the preset voltage range, the first incoming line switch control circuit, the second incoming line switch control circuit and the bus switch control circuit control the first transfer switch, the second transfer switch and the bus switch to be closed according to the closing instruction sent by the control module; If the first incoming line voltage parameter or the second incoming line voltage parameter does not fall within the preset voltage range, the first incoming line switch control circuit, the second incoming line switch control circuit and the bus switch control circuit control the first transfer switch, the second transfer switch and two of the bus switches to close according to the closing instruction sent by the control module.

5. The device according to claim 1, characterized in that The busbar cabinet comprises a first busbar section and a second busbar section; The first incoming line cabinet is connected to the first bus section via the first incoming line switch, the second incoming line cabinet is connected to the second bus section via the second incoming line switch, and the first bus section is connected to the second bus section via the bus switch.

6. The device according to claim 4, characterized in that The first incoming line switch control circuit includes a phase sequence relay, the second incoming line switch control circuit includes a phase sequence relay, and the bus switch control circuit includes a synchronous relay.

7. The device according to claim 6, characterized in that The phase sequence relay and the synchronous relay are both connected to the control module, and the control module is used to obtain the first incoming line voltage parameter and the second incoming line voltage parameter through the synchronous relay.

8. The device according to claim 1, characterized in that The control module includes a programmable logic controller.

9. A low voltage power distribution system, characterized in that: It comprises a first incoming line cabinet, a second incoming line cabinet, a busbar cabinet and a synchronous parallel operation control device as described in any one of claims 1 to 8; The first incoming line cabinet includes a first incoming line switch, the second incoming line cabinet includes a second incoming line switch, and the busbar cabinet includes a busbar switch.

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