Multi-power integrated electrical interlocking device
By designing the signal conversion and interlock connection module of the multi-power integrated electrical interlock device, the parallel risk and logic conflict problems existing in the traditional interlock design in multi-power systems are solved, realizing safe isolation and anti-conflict switching of multi-power systems, and improving the safety and reliability of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI LIANGXIN ELECTRICAL CO LTD
- Filing Date
- 2025-05-07
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional power interlock designs in multi-power systems suffer from problems such as the risk of multiple power sources being connected in parallel, interlocking logic conflicts, insufficient hardware reliability, complex interlocking wiring, and excessive resource consumption, making it difficult to provide sufficient flexibility and security.
A multi-power integrated electrical interlocking device is adopted. The hardware cascade interlocking logic design is realized through the signal conversion module and the interlocking connection module. The signal conversion module converts the status node signal of the circuit breaker into multiple dry node signals. The control is achieved through the interlocking connection unit and the interlocking connection network to realize forced interlocking between multiple power sources and avoid circulating current or short circuit.
It requires no external interlocking lines, consumes few resources, and only needs one switch status node to achieve safe isolation and anti-collision switching between multiple power sources. It avoids the circulating current or short circuit problems caused by the risk of multiple power sources in parallel, and improves the safety and reliability of the system.
Smart Images
Figure CN224289309U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of low-voltage electrical technology, and more specifically, to a multi-power integrated electrical interlocking device. Background Technology
[0002] Power interlocking mechanisms are an important component in ensuring power supply safety and stability. Traditional power interlocking designs often use direct mechanical cables or electrical connections to avoid circulating currents or short circuits caused by direct connections between different power paths.
[0003] However, with the increasing demand for power supply reliability and flexibility, especially in application scenarios involving multi-power supply systems, traditional interlock designs have limitations such as the risk of multiple power supply parallel operation, interlock logic conflicts, insufficient reliability, high resource consumption, and high maintenance costs. Therefore, they cannot provide sufficient flexibility and security guarantees. Consequently, traditional interlock designs cannot meet the application requirements of multi-power supply systems. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a multi-power integrated electrical interlock device, thereby solving the problem that traditional interlock designs in the prior art cannot meet the application requirements of multi-power systems.
[0005] To achieve the above objectives, the technical solution adopted in this utility model embodiment is as follows:
[0006] This utility model provides a multi-power integrated electrical interlocking device, including: multiple signal conversion modules and interlocking connection modules. Each signal conversion module includes an input terminal and multiple output terminals. The input terminal is connected to the status node of a circuit breaker in a multi-power system.
[0007] Each of the signal conversion modules is used to receive the input signal of the status node of the target circuit breaker connected to the signal conversion module, and convert the input signal into multiple sets of dry node signals, wherein the input signal is used to indicate the closing and opening status of the target circuit breaker, and each set of dry node signals is used to control the closing path of a non-target circuit breaker.
[0008] The interlocking connection module includes multiple interlocking connection units that correspond one-to-one with each of the signal conversion modules.
[0009] The signal conversion module has multiple output terminals connected to the corresponding interlocking connection units; the signal conversion module transmits the multiple sets of dry node signals to the corresponding interlocking connection units through the multiple output terminals.
[0010] Each of the interlocking connection units includes an interlocking connection network, which is connected based on the interlocking logic of the corresponding target circuit breaker. The interlocking connection unit performs interlocking control on the corresponding target circuit breaker through the interlocking connection network and the multiple sets of dry node signals.
[0011] In one possible implementation, the signal conversion module includes an interlocking relay, which includes a first coil and multiple sets of first contacts;
[0012] One end of the first coil is connected to the status node of the circuit breaker, and the other end of the first coil is connected to the neutral wire;
[0013] When the first coil is energized, the input signal is converted into multiple sets of dry contact signals through multiple sets of first contacts.
[0014] In one possible implementation, the plurality of first contacts include normally closed contacts that close when the interlocking relay is de-energized.
[0015] In one possible implementation, the signal conversion module includes an AC contactor, which includes a second coil and multiple sets of second contacts;
[0016] One end of the second coil is connected to the status node of the circuit breaker, and the other end of the second coil is connected to the neutral wire;
[0017] When the second coil is energized, the input signal is converted into multiple sets of dry contact signals through multiple sets of second contacts.
[0018] In one possible implementation, the multi-power system includes multiple power sources and multiple circuit breakers, the multiple circuit breakers including incoming line circuit breakers and bus circuit breakers, wherein the incoming line circuit breakers are used to connect the power sources, and the bus circuit breakers are used to control the switching between different power sources.
[0019] In one possible implementation, the interlocking logic of the bus circuit breaker includes:
[0020] If the bus circuit breaker is closed, the incoming circuit breakers on both sides of the bus circuit breaker will be open.
[0021] In one possible implementation, the interlocking logic of the incoming circuit breaker includes:
[0022] If the incoming line circuit breaker is closed, the bus circuit breaker associated with the incoming line circuit breaker will be opened.
[0023] In one possible implementation, when the target circuit breaker is in the closed state, the trunk node signal is an open signal, and the closing path of the non-target circuit breaker controlled by the trunk node signal is disconnected.
[0024] When the target circuit breaker is in the open state, and the trunk node signal is a closed signal, the closing path of the non-target circuit breaker controlled by the trunk node signal is closed.
[0025] In one possible implementation, the interlocked wiring network includes multiple buses and multiple incoming lines;
[0026] Within the same busbar segment, only one incoming line is closed, and if the busbar is closed, either of the two incoming lines from different power sources connected to the busbar is disconnected.
[0027] In one possible implementation, the multiple circuit breakers in the multi-power system include a main power circuit breaker and a backup power circuit breaker.
[0028] When the main power circuit breaker is in the open state, the standby power circuit breaker performs a closing operation.
[0029] According to an embodiment of the multi-power integrated electrical interlocking device of this utility model, the interlocking connection module includes multiple interlocking connection units corresponding one-to-one with each signal conversion module. Each interlocking connection unit includes an interlocking wiring network. Each signal conversion module includes an input terminal and multiple output terminals. The input terminal is connected to the status node of a circuit breaker in the multi-power system, and the multiple output terminals are connected to the corresponding interlocking connection unit. Each signal conversion module is used to receive the input signal from the status node of the target circuit breaker connected to the signal conversion module, convert the input signal into multiple sets of dry node signals, and transmit the multiple sets of dry node signals to the corresponding interlocking connection unit through multiple output terminals. The interlocking wiring network included in the interlocking connection unit is connected based on the interlocking logic of the corresponding target circuit breaker, and then the interlocking connection unit performs interlocking control on the corresponding target circuit breaker through the interlocking wiring network and the multiple sets of dry node signals. This utility model provides a multi-power integrated electrical interlocking device that requires no external interlocking lines and occupies few resources, requiring only one switch state node. Through hardware-level interlocking logic design, forced interlocking between multiple power sources can be achieved, thereby ensuring safe isolation and anti-collision switching between multiple power sources, thus avoiding circulating current or short circuit problems caused by the risk of multiple power sources in parallel in a multi-power system. Attached Figure Description
[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1This diagram illustrates the architecture of a multi-power integrated electrical interlock device according to an embodiment of the present invention.
[0032] Figure 2 A schematic diagram of an interlocking relay provided in an embodiment of the present invention is shown;
[0033] Figure 3 This diagram illustrates the architecture of a multi-power supply system according to an embodiment of the present invention.
[0034] Figure 4 This diagram illustrates the structure of an interlocking connection unit according to an embodiment of the present invention.
[0035] Figure 5 This diagram illustrates the structure of another interlocking connection unit provided in an embodiment of the present invention.
[0036] Figure 6 This diagram illustrates the structure of another interlocking connection unit provided in an embodiment of the present invention.
[0037] Figure 7 This diagram illustrates the structure of another interlocking connection unit provided in an embodiment of the present invention.
[0038] Figure 8 A schematic diagram of another interlocking connection unit provided in an embodiment of the present invention is shown. Detailed Implementation
[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0041] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this utility model, it should be noted that the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0042] In existing technologies, traditional dual-power interlock designs typically employ mechanical cables or electrical connections, generally used for the mutual exclusion relationships of two or three switches. However, in multi-power systems, due to the complexity of power paths, using traditional interlock designs can easily lead to problems such as the risk of parallel operation of multiple power sources, interlocking logic conflicts, insufficient hardware reliability, complex interlocking wiring, and excessive resource consumption. For example, in a multi-power system, simultaneously closing different incoming circuit breakers and bus circuit breakers may cause circulating currents or short circuits. Furthermore, bus circuit breakers and incoming circuit breakers require multi-dimensional interlocking, and electrical interlocking not only requires additional status node signals from multiple circuit breakers (switches), but also increases wiring complexity exponentially with each additional switch.
[0043] To address the problems existing in the prior art, this utility model provides a multi-power integrated electrical interlocking device that does not require external interlocking lines and occupies few resources, requiring only one switch state node. Through hardware-level interlocking logic design, forced interlocking between multiple power sources can be achieved, thereby ensuring safe isolation and anti-collision switching between multiple power sources, thus avoiding circulating current or short circuit problems caused by the risk of multiple power sources being connected in parallel in a multi-power system.
[0044] Figure 1 A schematic diagram of the architecture of a multi-power integrated electrical interlocking device provided by this utility model is shown. (Refer to...) Figure 1 As shown, the multi-power integrated electrical interlocking device includes multiple signal conversion modules and interlocking connection modules. Each interlocking connection module includes multiple interlocking connection units corresponding to each signal conversion module. Each interlocking connection unit includes an interlocking wiring network. Each signal conversion module includes one input terminal and multiple output terminals. The input terminal is connected to the status node of a circuit breaker in the multi-power system, and the multiple output terminals are connected to the corresponding interlocking connection unit.
[0045] For example, the circuit breakers in a multi-power system are connected by functional connection lines to establish an electrical connection channel between the circuit breakers. Each signal conversion module is used to convert the input signal of the circuit breaker status node into multiple sets of independent dry node signals. The interlock connection module includes an interlock connection network, which is used to make connections according to the interlock logic of the circuit breaker, and then to perform interlock control on the corresponding target circuit breaker through the interlock connection network and multiple sets of dry node signals, thereby realizing hardware interlock control of the multi-power system.
[0046] Optionally, each signal conversion module is used to receive the input signal of the status node of the target circuit breaker connected to the signal conversion module, convert the input signal into multiple sets of dry node signals, and transmit the multiple sets of dry node signals to the corresponding interlock connection unit through multiple output terminals. The interlock connection unit includes an interlock connection network connected based on the interlock logic of the corresponding target circuit breaker, and then the interlock connection unit performs interlock control on the corresponding target circuit breaker through the interlock connection network and the multiple sets of dry node signals.
[0047] Optionally, refer to Figure 1 As shown, the status node A1 of circuit breaker Q1 is connected to the input terminal of the signal conversion module B1. The signal conversion module B1 receives the input signal from the status node A1, converts the input signal into multiple sets of dry node signals, and outputs multiple sets of dry node signals through multiple output terminals to distribute each set of dry node signals to multiple circuit breakers other than circuit breaker Q1, such as circuit breakers Q2, Q3, Q4, and QN. Among them, the dry node signals include multiple combinations of tripping signals, such as the first combination of tripping signals (A11_1, A11_2) distributed to circuit breaker Q2, the second combination of tripping signals (A12_1, A12_2) distributed to circuit breaker Q3, the third combination of tripping signals (A13_1, A13_2) distributed to circuit breaker Q4, and the (N-1)th combination of tripping signals (A1[N-1]_1, A1[N-1]_2) distributed to circuit breaker QN.
[0048] Optionally, continue to refer to Figure 1 As shown, the state node AN of circuit breaker QN is connected to the input terminal of the signal conversion module BN. The signal conversion module BN receives the input signal from the state node AN, converts the input signal into multiple sets of dry node signals, and outputs multiple sets of dry node signals through multiple output terminals to distribute each set of dry node signals to multiple circuit breakers other than circuit breaker QN, such as circuit breakers Q1, Q2, Q3, and Q[N-1]. Among them, the dry node signals include multiple combinations of tripping signals, such as the first combination of tripping signals (AN1_1, AN1_2), which are distributed to circuit breaker Q1; the second combination of tripping signals (AN2_1, AN2_2), which are distributed to circuit breaker Q2; the third combination of tripping signals (AN3_1, AN3_2), which are distributed to circuit breaker Q3; and the (N-1)th combination of tripping signals (AN[N-1]_1, AN[N-1]_2), which are distributed to circuit breaker Q[N-1].
[0049] Based on this, the signal conversion module enables one node to output multiple signals, which not only saves on switch resources but also reduces wiring costs.
[0050] Optionally, if there are multiple N circuit breakers in a multi-power supply system, N signal conversion modules can be used. For each target circuit breaker connected to the signal conversion module, the signal conversion module can convert N-1 sets of dry node signals using a single status node. Each set of dry node signals is distributed to non-target circuit breakers among the multiple circuit breakers, excluding the target circuit breaker. This enables the transmission of the target circuit breaker's opening and closing status to other non-target circuit breakers. The dry node signals are distributed according to electrical logic, and an interlocking connection network is formed using interlocking connection modules. Hardware interlocking function is then achieved through onboard traces on an integrated printed circuit board (PCB).
[0051] It should be noted that, due to the different structures and combinations of multi-power systems, the number of power sources, incoming circuit breakers, and bus circuit breakers included also vary. Therefore, the interlocking logic of the corresponding circuit breakers will also be different for different multi-power systems, and the wiring method of the interlocking connection network will also be different.
[0052] Optionally, the input signal is used to indicate the closing / opening status of the target circuit breaker, and each trunk node signal is used to control the closing path of a non-target circuit breaker. Specifically, when the target circuit breaker is closed, the trunk node signal is an open signal, and the closing path of the non-target circuit breaker controlled by the trunk node signal is open. Conversely, when the target circuit breaker is open, the trunk node signal is a closed signal, and the closing path of the non-target circuit breaker controlled by the trunk node signal is closed. Here, the closing status indicates that the target circuit breaker is closed, and the opening status indicates that the target circuit breaker is open. That is, the closing / opening logic of the trunk node signal is the opposite of that of the target circuit breaker; that is, when the target circuit breaker is closed, the node is not closed, and when the target circuit breaker is open, the node is closed.
[0053] For example, when the target circuit breaker is closed, the node is not closed, and when it is open, the node is closed. That is to say, when the target circuit breaker is in the closed state, its corresponding dry node signal will not form a closed loop, while when the target circuit breaker is in the open state, its corresponding dry node signal will form a closed loop.
[0054] It should be noted that the input signal from the circuit breaker status node received by the signal conversion module indicates whether the target circuit breaker is in the closed or open state. However, after the signal conversion module realizes one-to-many signal conversion, the resulting multiple sets of dry node signals are only used to control the closing path of one non-target circuit breaker, and do not control the opening path. Moreover, the dry node signal corresponds to the control of a segment of the path where the non-target circuit breaker is located, rather than the entire closed state. In this way, when interlocking control is performed on the target controller, it can be ensured that only one power supply path is closed.
[0055] Based on this, this invention constructs a complex interlocked connection network by using a single signal conversion module to output multiple signals and connecting them according to the interlocking logic of the circuit breaker. This ensures that in a multi-power supply system, only one power supply path is closed at any given time, preventing short circuits or other safety issues caused by parallel operation of power supplies. Furthermore, through reasonable logic design and hardware connection, effective control and safety protection of the multi-power supply system are achieved.
[0056] As one possible implementation, the multi-power supply system includes multiple circuit breakers. For each circuit breaker, a status node of the circuit breaker is connected to a signal conversion module. The input signal of the status node is used to indicate the closing / opening status of the target circuit breaker connected to the signal conversion module. The signal conversion module converts the status node into multiple synchronization nodes, that is, it transmits the closing / opening status of the target circuit breaker to other non-target circuit breakers. The non-target circuit breakers are the circuit breakers other than the target circuit breaker among the multiple circuit breakers included in the multi-power supply system.
[0057] For example, if there are five circuit breakers in a multi-power supply system, denoted as circuit breaker Q1, circuit breaker Q2, circuit breaker Q3, circuit breaker Q4, and circuit breaker Q5 respectively, and each circuit breaker corresponds to a signal conversion module, denoted as signal conversion module B1, signal conversion module B2, signal conversion module B3, signal conversion module B4, and signal conversion module B5 respectively, taking circuit breaker Q1 as the target circuit breaker, a state node A1 of circuit breaker Q1 is connected to the input terminal of signal conversion module B1. Signal conversion module B1 receives the input signal from the state node A1 of the target circuit breaker Q1 and converts the input signal into multiple sets of dry node signals. Each set of dry node signals is distributed to the non-target circuit breakers other than circuit breaker Q1, namely circuit breakers Q2, Q3, Q4, and Q5. In this way, using only the state node A1 of circuit breaker Q1, the closing and opening status of circuit breaker Q1 can be transmitted to other circuit breakers through signal conversion module B1.
[0058] Optionally, the signal conversion module can be an interlocking relay, which includes a first coil and multiple sets of first contacts. One end of the first coil is connected to the status node of the circuit breaker, and the other end is connected to the neutral wire. When the first coil is energized, the input signal is converted into multiple sets of dry contact signals through the multiple sets of first contacts.
[0059] For example, refer to Figure 2The interlocking relay shown has ports 13 (QJS1_1) and 14 (N_COM) as its first coil, ports 1, 5, 9, 2, 6, 10, 3, 7, 11, and 4, 8, 12 as its multiple first contacts, and ports 9, 10, 11, and 12 as its common terminal. Among them, one end of the first coil of the interlocking relay, namely port 13 (QJS1_1), is connected to the status node of the circuit breaker, and the other end of the first coil, namely port 14 (N_COM), is connected to the neutral line. When the first coil is energized, the above four sets of first contacts can convert one input signal of the circuit breaker status node into multiple sets of dry contact signals. For example, one input signal is converted into four sets of dry contact signals, which are denoted as (A11_1, A11_2), (A12_1, A12_2), (A13_1, A13_2) and (A14_1, A14_2) respectively. In this way, the signal conversion module realizes one-to-many signal output, so as to transmit the closing and opening status of the circuit breaker to other circuit breakers.
[0060] Optionally, the multiple sets of first contacts include normally closed contacts, which close when the interlocking relay is de-energized. In other words, the interlocking relay employs a de-energization interlocking design mechanism. The normally closed contacts, by default, block dangerous operations; that is, when not energized, the normally closed contacts remain closed and are directly connected in series in the control circuit for dangerous operations. At this time, the circuit is physically blocked, and any commands that might trigger dangerous equipment actions cannot be transmitted. Only when safety conditions are met will the interlocking relay be energized and activated, causing the normally closed contacts to open and disengage the blocking mechanism.
[0061] Based on this, a fault-safe mechanism is provided by designing a power failure interlocking relay. The power failure interlocking design ensures that the multi-power supply system automatically enters a safe state when the power supply is abnormal or the control fails through the forced blocking logic at the hardware level.
[0062] Optionally, the signal conversion module can also be an AC contactor, which includes a second coil and multiple sets of second contacts. One end of the second coil is connected to the status node of the circuit breaker, and the other end is connected to the neutral wire. When the second coil is energized, the input signal is converted into multiple sets of dry contact signals through the multiple sets of second contacts.
[0063] For example, similar to an interlocking relay, the AC contactor includes a second coil and multiple sets of second contacts. One end of the second coil is connected to the status node of the circuit breaker, and the other end is connected to the neutral wire. When the second coil is energized, the multiple sets of second contacts can convert one input signal of the circuit breaker status node into multiple dry contact signals, thereby achieving one-to-many signal output based on the signal conversion module, so as to transmit the closing and opening status of the circuit breaker to other circuit breakers. Similarly, the multiple sets of second contacts also include normally closed contacts, which close when the AC contactor is de-energized.
[0064] Therefore, regardless of whether the signal conversion module uses interlocking relays or AC contactors, the circuit breaker status nodes can be used to control the coils of the interlocking relays or AC contactors to generate multiple dry contact signals. Furthermore, the nodes are set to close when the circuit breaker trips, and the contacts are triggered when the coils of the interlocking relays or AC contactors are energized. In this way, the control circuit can be directly cut off through relay contacts with multiple power supply combinations, eliminating the need for software-based interlocking logic and resulting in higher reliability.
[0065] As one possible implementation, a multi-power system includes multiple power sources and multiple circuit breakers, including incoming line circuit breakers and bus circuit breakers. The incoming line circuit breakers are used to connect the power sources, and the bus circuit breakers are used to control the switching between different power sources.
[0066] For example, refer to Figure 3 The multi-power supply system shown includes three power supplies (S1, S2, and S3), three incoming circuit breakers (QS1, QS2, and QS3), and two bus circuit breakers (QTIE1 and QTIE2). Additionally, LOAD1, LOAD2, and LOAD3 are loads. When all three power supplies (S1, S2, and S3) are operating normally, they can supply power to each of the three loads (LOAD1, LOAD2, and LOAD3) simultaneously.
[0067] Optionally, to avoid the risk of parallel operation between multiple power sources, the incoming circuit breakers and busbar circuit breakers in a multi-power source system must meet certain interlocking logic. Specifically, the interlocking logic of the busbar circuit breaker includes: if the busbar circuit breaker is closed, the incoming circuit breakers on both sides of the busbar circuit breaker are opened. The interlocking logic of the incoming circuit breaker includes: if the incoming circuit breaker is closed, the busbar circuit breaker associated with the incoming circuit breaker is opened.
[0068] On the other hand, the multiple circuit breakers include a main power circuit breaker and a backup power circuit breaker. The interlocking logic of the main power circuit breaker is that the backup power circuit breaker performs a closing operation if and only if the main power circuit breaker is in the open state.
[0069] For example, continue to refer to Figure 3The multi-power supply system shown below, combined with the automatic switching logic shown in Table 1, when power supplies S1, S2 and S3 are all operating normally, taking the incoming circuit breaker QS1 as the target circuit breaker as an example, if the incoming circuit breaker QS1 is closed, then the interlocking logic corresponding to the incoming circuit breaker QS1 is that both bus circuit breakers QTIE1 and QTIE2 must be opened, and the incoming circuit breakers QS2 and QS3 must be closed, so as to prevent power supplies S1, S2 and S3 from operating in parallel.
[0070] For example, when power supply S1 and power supply S2 are operating normally, taking incoming circuit breaker QS1 as the target circuit breaker, if incoming circuit breaker QS1 is closed, then the interlocking logic corresponding to incoming circuit breaker QS1 is that bus circuit breaker QTIE1 and incoming circuit breaker QS3 are open, and incoming circuit breaker QS2 and bus circuit breaker QTIE2 are closed, so as to prevent power supply S1 and power supply S2 from operating in parallel.
[0071] For example, when power supply S1 and power supply S3 are operating normally, taking incoming circuit breaker QS1 as the target circuit breaker, if incoming circuit breaker QS1 is closed, then the interlocking logic corresponding to incoming circuit breaker QS1 is that bus circuit breaker QTIE1 and incoming circuit breaker QS3 are closed, and incoming circuit breaker QS2 and bus circuit breaker QTIE2 are open, so as to prevent power supply S1 and power supply S3 from operating in parallel.
[0072] Table 1 Automatic Switching Logic
[0073]
[0074] Optionally, the interlocking connection module includes multiple interlocking connection units that correspond one-to-one with each signal conversion module. Since the circuit breaker also corresponds one-to-one with each signal conversion module, it can be understood that the circuit breaker and the interlocking connection unit also correspond one-to-one. Based on this, combined with Figure 3 The multi-power supply system shown has an interlocking connection unit corresponding to the signal conversion module connected to circuit breaker QS1, as follows: Figure 4 As shown, the interlocking connection unit corresponding to the signal conversion module connected to circuit breaker QTIE1 is as follows: Figure 5 As shown, the interlocking connection unit corresponding to the signal conversion module connected to circuit breaker QS2 is as follows: Figure 6 As shown, the interlocking connection unit corresponding to the signal conversion module connected to circuit breaker QTIE2 is as follows: Figure 7 As shown, the interlocking connection unit corresponding to the signal conversion module connected to circuit breaker QS3 is as follows: Figure 8 As shown.
[0075] For example, refer to Figures 4 to 8Each interlocking connection unit shown includes an interlocking wiring network, which can be connected based on the interlocking logic of the corresponding target circuit breaker. Specifically, as shown... Figure 4 As shown, when the incoming and outgoing terminals of the QS1 closing control line are connected, the closing path of circuit breaker QS1 is closed. Similarly, as... Figure 5 As shown, when the incoming terminal and outgoing terminal of the QTIE1 closing control line are connected, the closing path of circuit breaker QTIE1 is closed, as follows. Figure 6 As shown, when the incoming and outgoing terminals of the QS2 closing control line are connected, the closing path of circuit breaker QS2 is closed, as follows. Figure 7 As shown, when the incoming and outgoing terminals of the QTIE2 closing control line are connected, the closing path of circuit breaker QS1 is closed, as follows. Figure 8 As shown, when the incoming terminal and outgoing terminal of the QS3 closing control line are connected, the closing path of the circuit breaker QS3 is closed.
[0076] It should be noted that the interlocking connection network includes multiple busbars and multiple incoming lines. Within the same busbar segment, only one incoming line is closed, and if the busbar is closed, either of the two incoming lines from different power sources connected to the busbar is disconnected. Based on this, and combined with the interlocking logic shown in Table 1 above, the connection is made so that the interlocking connection unit can perform interlocking control on the corresponding target circuit breaker through the interlocking connection network and multiple dry contact signals converted by the signal conversion module.
[0077] In addition, for each additional bus circuit breaker in a multi-power system, new interlocking logic is required to ensure that there are no conflicts in adjacent bus sections when the bus circuit breaker is closed.
[0078] According to the multi-power integrated electrical interlock device provided by this utility model, considering the electrical clearance between each power source in the multi-power system, the closing port of each circuit breaker is actually controlled by the circuit breaker's interlock logic through onboard and wiring, thereby realizing hardware interlock control of each circuit breaker.
[0079] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A multi-power integrated electrical interlock device, characterized by, include: Multiple signal conversion modules and interlocking connection modules are provided. Each signal conversion module includes an input terminal and multiple output terminals. The input terminal is connected to the status node of a circuit breaker in a multi-power supply system. Each of the signal conversion modules is used to receive the input signal of the status node of the target circuit breaker connected to the signal conversion module, and convert the input signal into multiple sets of dry node signals, wherein the input signal is used to indicate the closing and opening status of the target circuit breaker, and each set of dry node signals is used to control the closing path of a non-target circuit breaker. The interlocking connection module includes multiple interlocking connection units that correspond one-to-one with each of the signal conversion modules. The signal conversion module has multiple output terminals connected to the corresponding interlocking connection units; the signal conversion module transmits the multiple sets of dry node signals to the corresponding interlocking connection units through the multiple output terminals. Each of the interlocking connection units includes an interlocking connection network, which is connected based on the interlocking logic of the corresponding target circuit breaker. The interlocking connection unit performs interlocking control on the corresponding target circuit breaker through the interlocking connection network and the multiple sets of dry node signals.
2. The multi-power integrated electrical interlock device of claim 1, wherein, The signal conversion module includes an interlocking relay, which includes a first coil and multiple sets of first contacts. One end of the first coil is connected to the status node of the circuit breaker, and the other end of the first coil is connected to the neutral wire; When the first coil is energized, the input signal is converted into multiple sets of dry contact signals through multiple sets of first contacts.
3. The multi-source integrated electrical interlock device of claim 2, wherein, The multiple sets of first contacts include normally closed contacts, which close when the interlocking relay is de-energized.
4. The multi-power integrated interlock device of claim 1, wherein, The signal conversion module includes an AC contactor, which includes a second coil and multiple sets of second contacts; One end of the second coil is connected to the status node of the circuit breaker, and the other end of the second coil is connected to the neutral wire; When the second coil is energized, the input signal is converted into multiple sets of dry contact signals through multiple sets of second contacts.
5. The multi-power integrated interlock device of claim 1, wherein, The multi-power system includes multiple power sources and multiple circuit breakers. The multiple circuit breakers include incoming line circuit breakers and busbar circuit breakers. The incoming line circuit breakers are used to connect to the power sources, and the busbar circuit breakers are used to control the switching between different power sources.
6. The multi-power integrated electrical interlocking device according to claim 5, characterized in that, The interlocking logic of the bus circuit breaker includes: If the bus circuit breaker is closed, the incoming circuit breakers on both sides of the bus circuit breaker will be open.
7. The multi-power integrated electrical interlocking device according to claim 5, characterized in that, The interlocking logic of the incoming line circuit breaker includes: If the incoming line circuit breaker is closed, the bus circuit breaker associated with the incoming line circuit breaker will be opened.
8. The multi-power integrated electrical interlocking device according to claim 1, characterized in that, When the target circuit breaker is in the closed state, and the dry contact signal is the open signal, the closing path of the non-target circuit breaker controlled by the dry contact signal is disconnected. When the target circuit breaker is in the open state, and the trunk node signal is a closed signal, the closing path of the non-target circuit breaker controlled by the trunk node signal is closed.
9. The multi-power integrated electrical interlocking device according to claim 1, characterized in that, The interlocked wiring network includes multiple busbars and multiple incoming lines; Within the same busbar segment, only one incoming line is closed, and if the busbar is closed, either of the two incoming lines from different power sources connected to the busbar is disconnected.
10. The multi-power integrated electrical interlocking device according to claim 1, characterized in that, The multiple circuit breakers in the multi-power system include a main power circuit breaker and a backup power circuit breaker. When the main power circuit breaker is in the open state, the standby power circuit breaker performs a closing operation.