Isolation switch analog circuit and system
By controlling the pulse signals of the closing and opening relays, the closing or opening function of the disconnecting switch is simulated, which solves the problem of high cost caused by the expensive and large size of the disconnecting switch, and realizes low-cost test environment construction and convenient operation.
Patent Information
- Application Number
- CN202423094515.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Disconnect switches are expensive and bulky, which leads to high costs and inconvenience in setting up test environments, especially in multi-cluster battery simulation environments where they occupy space and are expensive.
By using closing relays and opening relays, the relay ports are controlled to open or close via pulse signals, simulating the closing or opening function of a disconnector switch. Logic linkage can be achieved with only two relays and two power supplies.
It reduces testing costs, saves testing area, and improves testing convenience and efficiency. The status can be intuitively observed through the level detection port and LED, ensuring that the relay exists in only one state.
Smart Images
Figure CN223553309U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic circuit technology, and more specifically, to an isolation switch analog circuit and system. Background Technology
[0002] As an important component in the energy storage system architecture, the disconnecting switch will close or open when it receives a pulse signal, thereby protecting the key components in the system.
[0003] However, disconnect switches are expensive and bulky, making them costly and inconvenient to use in test environment setups. Using multiple disconnect switches to build multi-cluster battery simulation environments is extremely space-consuming and expensive. Utility Model Content
[0004] The purpose of this application is to provide a circuit and system for simulating the function of a disconnecting switch, thereby reducing testing costs.
[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:
[0006] On the one hand, this application provides a disconnecting switch simulation circuit, which includes: a closing relay, a opening relay, a first power supply, and a second power supply;
[0007] The first port of the closing relay is connected to the second power supply, and the second port of the closing relay is connected to the third port of the opening relay; the first port of the opening relay is connected to the first power supply, and the second port of the opening relay is connected to the third port of the closing relay.
[0008] When the closing relay receives a pulse signal, the first and second ports of the closing relay are disconnected, the first and second ports of the opening relay are closed, and the closing relay is energized and self-closing.
[0009] When the tripping relay receives a pulse signal, the first and second ports of the tripping relay are disconnected, the first and second ports of the closing relay are closed, and the tripping relay is energized and self-primed.
[0010] Furthermore, the closing relay includes: a closing coil, a first normally closed contact, a second normally closed contact, a first normally open contact, a second normally open contact, a first switch, and a second switch; the opening relay includes: an opening coil, a third normally closed contact, a fourth normally closed contact, a third normally open contact, a fourth normally open contact, a third switch, and a fourth switch;
[0011] The first normally closed contact is connected to the second power supply, the first normally open contact is grounded, the stationary contact of the first switch is connected to the fourth normally open contact, the stationary contact of the second switch is connected to the positive power supply terminal of the closing coil, and the negative power supply terminal of the closing coil is grounded.
[0012] The third normally closed contact is connected to the first power supply, the third normally open contact is grounded, the stationary contact of the third switch is connected to the second normally open contact, the stationary contact of the fourth switch is connected to the positive power supply terminal of the trip coil, and the negative power supply terminal of the trip coil is grounded.
[0013] When a pulse signal is received at the positive power supply terminal of the closing coil, the moving contact of the first switch closes with the first normally open contact, the moving contact of the third switch closes with the third normally closed contact, the moving contact of the second switch closes with the second normally open contact, and the closing coil is energized and self-primed.
[0014] When a pulse signal is received at the positive power supply terminal of the trip coil, the moving contact of the third switch closes with the third normally open contact, the moving contact of the first switch closes with the first normally closed contact, the moving contact of the fourth switch closes with the fourth normally open contact, and the trip coil is energized and self-primed.
[0015] Furthermore, the isolation switch analog circuit also includes a first diode, a second diode, a third diode, and a fourth diode;
[0016] The cathodes of the first diode and the second diode are both connected to the positive power supply terminal of the closing coil. The anode of the first diode is used to receive pulse signals, and the anode of the second diode is connected to the stationary contact of the second switch.
[0017] The cathodes of the third diode and the fourth diode are both connected to the positive power supply terminal of the trip coil. The anode of the third diode is used to receive pulse signals, and the anode of the fourth diode is connected to the stationary contact of the fourth switch.
[0018] Furthermore, the isolation switch analog circuit also includes a first freewheeling diode and a second freewheeling diode;
[0019] The cathode of the first freewheeling diode is connected to the positive power supply terminal of the closing coil, and the anode of the first freewheeling diode is connected to the negative power supply terminal of the closing coil.
[0020] The cathode of the second freewheeling diode is connected to the positive power supply terminal of the trip coil, and the anode of the second freewheeling diode is connected to the negative power supply terminal of the trip coil.
[0021] Furthermore, the isolation switch analog circuit also includes a first resistor and a second resistor;
[0022] One end of the first resistor is connected to the stationary contact of the first switch, and the other end of the first resistor serves as a closing level detection port.
[0023] One end of the second resistor is connected to the stationary contact of the third switch, and the other end of the second resistor serves as the tripping level detection port.
[0024] Furthermore, the disconnector switch analog circuit also includes a closing indicator module and a closing indicator module;
[0025] One end of the closing indicator module is connected to the stationary contact of the second switch, and the other end of the closing indicator module is grounded.
[0026] One end of the trip indicator module is connected to the stationary contact of the fourth switch, and the other end of the trip indicator module is grounded.
[0027] Furthermore, the closing indicator module includes a first light-emitting diode, the anode of which is connected to the stationary contact of the second switch, and the cathode of which is grounded.
[0028] The trip indicator module includes a second light-emitting diode, the anode of which is connected to the stationary contact of the fourth switch, and the cathode of which is grounded.
[0029] Furthermore, the closing indicator module also includes a third resistor, one end of which is connected to the cathode of the first light-emitting diode, and the other end of which is grounded;
[0030] The circuit breaker indicator module also includes a fourth resistor, one end of which is connected to the cathode of the second light-emitting diode, and the other end of which is grounded.
[0031] Furthermore, the isolation switch analog circuit also includes a first filter capacitor and a second filter capacitor;
[0032] One end of the first filter capacitor is connected to the positive power supply terminal of the closing coil, and the other end of the first filter capacitor is grounded.
[0033] One end of the second filter capacitor is connected to the positive power supply terminal of the trip coil, and the other end of the second filter capacitor is grounded.
[0034] On the other hand, this application also provides a disconnecting switch simulation system, which includes a disconnecting switch simulation circuit as described in any of the foregoing embodiments.
[0035] Compared with the prior art, this application has the following advantages:
[0036] This application provides a circuit and system for simulating a disconnecting switch. When the closing relay receives a pulse signal, since the first and second ports of the opening relay are closed, a first power supply can continuously supply power to the third port of the closing relay through the first and second ports of the opening relay, causing the closing relay to self-energize and pull in. Since the first and second ports of the closing relay are open, a second power supply cannot supply power to the third port of the opening relay, preventing the opening relay from self-energizing, thus simulating the closing function of the disconnecting switch.
[0037] When the tripping relay receives a pulse signal, since the first and second ports of the closing relay are closed, the second power supply can continuously supply power to the third port of the tripping relay through the first and second ports of the closing relay, causing the tripping relay to self-energize and click. Since the first and second ports of the tripping relay are open, the first power supply cannot supply power to the third port of the closing relay, preventing the closing relay from self-energizing, thus simulating the tripping function of a disconnecting switch.
[0038] This application, without any other control circuits, can achieve logical linkage between the closing and opening relays with just two relays and two power supplies when triggered by a pulse signal, thereby simulating the closing or opening function of a disconnecting switch, greatly reducing testing costs. Attached Figure Description
[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0040] Figure 1 This application provides a schematic diagram of the structure of an analog circuit for a disconnecting switch.
[0041] Figure 2 One of the circuit diagrams for an analog circuit of a disconnecting switch provided in this application;
[0042] Figure 3 A second circuit diagram of an analog circuit for a disconnecting switch provided in this application;
[0043] Figure 4 The third circuit diagram of an analog circuit for a disconnecting switch provided in this application;
[0044] Figure 5 A closing schematic diagram of a disconnector switch analog circuit provided in this application;
[0045] Figure 6 The present application provides a schematic diagram of the tripping principle of an isolation switch analog circuit.
[0046] Figure reference numerals: 10-Isolating switch analog circuit; 100-Closing relay; 200-Opening relay; 300-First power supply; 400-Second power supply; 500-Closing indicator module; 600-Opening indicator module. Detailed Implementation
[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0048] In the description of this application, it should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.
[0049] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0050] As mentioned in the background section, the high cost and large size of disconnect switches make them expensive and inconvenient to use in setting up test environments. Using multiple disconnect switches to build a multi-cluster battery simulation environment is extremely space-consuming and costly.
[0051] In view of this, please refer to Figure 1 This application provides an example of a disconnector switch analog circuit 10, including: a closing relay 100, a opening relay 200, a first power supply 300, and a second power supply 400.
[0052] Specifically, the first port A1 of the closing relay 100 is connected to the second power supply 400, and the second port B1 of the closing relay 100 is connected to the third port C2 of the opening relay 200. The first port A2 of the opening relay 200 is connected to the first power supply 300, and the second port B2 of the opening relay 200 is connected to the third port C1 of the closing relay 100.
[0053] When the closing relay 100 receives a pulse signal, its first port A1 and second port B1 open, while the first port A2 and second port B2 of the opening relay 200 close. At this time, the first power supply 300 continuously supplies power to the third port C1 of the closing relay 100 through the first port A2 and second port B2 of the opening relay 200. Because the first port A1 and second port B1 of the closing relay 100 are open, the second power supply 400 cannot supply power to the third port C2 of the opening relay 200, causing the closing relay 100 to self-prime, while the opening relay 200 cannot self-prime, thus simulating the closing function of the disconnecting switch.
[0054] When the tripping relay 200 receives a pulse signal, its first port A2 and second port B2 open, while the first port A1 and second port B1 of the closing relay 100 close. At this time, the second power supply 400 continuously supplies power to the third port C2 of the tripping relay 200 through the first port A1 and second port B1 of the closing relay 100. Because the first port A2 and second port B2 of the tripping relay 200 are open, the first power supply 300 cannot supply power to the third port C1 of the closing relay 100, causing the tripping relay 200 to self-prime, while the closing relay 100 cannot self-prime, thus simulating the tripping function of the disconnecting switch.
[0055] Based on the above design, the closing or opening function of the disconnecting switch can be simulated by two relays and two power supplies. The circuit design is simple and greatly saves test area and cost.
[0056] In one alternative implementation, please refer to Figure 2The closing relay 100 includes: a closing coil X1, a first normally closed contact NC1, a second normally closed contact NC2, a first normally open contact NO1, a second normally open contact NO2, a first switch K1, and a second switch K2. The opening relay 200 includes: an opening coil X2, a third normally closed contact NC3, a fourth normally closed contact NC4, a third normally open contact NO3, a fourth normally open contact NO4, a third switch K3, and a fourth switch K4.
[0057] Among them, the first normally closed contact NC1 is connected to the second power supply 400, the first normally open contact NO1 is grounded, the stationary contact of the first switch K1 is connected to the fourth normally open contact NO4, the stationary contact of the second switch K2 is connected to the positive power supply terminal V1+ of the closing coil X1, and the negative power supply terminal V1- of the closing coil X1 is grounded.
[0058] The third normally closed contact NC3 is connected to the first power supply 300, the third normally open contact NO3 is grounded, the stationary contact of the third switch K3 is connected to the second normally open contact NO2, the stationary contact of the fourth switch K4 is connected to the positive power supply terminal V2+ of the trip coil X2, and the negative power supply terminal V2- of the trip coil X2 is grounded.
[0059] It should be noted that the first normally closed contact NC1 is equivalent to the first port A1 of the closing relay 100, the first switch K1 is equivalent to the second port B1 of the closing relay 100, and the positive power supply terminal V1+ of the closing coil X1 is equivalent to the third port C1 of the closing relay 100.
[0060] Similarly, the third normally closed contact NC3 is equivalent to the first port A2 of the trip relay 200, the third switch K3 is equivalent to the second port B2 of the trip relay 200, and the positive power supply terminal V2+ of the trip coil X2 is equivalent to the third port C2 of the trip relay 200.
[0061] The closing process of the disconnector switch analog circuit 10 is as follows:
[0062] When the positive power supply terminal V1+ of the closing coil X1 receives a pulse signal, the closing coil X1 is energized, thereby controlling the moving contact of the first switch K1 to close with the first normally open contact NO1, and the moving contact of the second switch K2 to close with the second normally open contact NO2. Since the opening coil X2 does not receive a pulse signal, the moving contact of the third switch K3 closes with the third normally closed contact NC3.
[0063] At this time, the first power supply 300 continuously supplies power to the positive power supply terminal V1+ of the closing coil X1 through the third normally closed contact NC3, the third switch K3, the second normally open contact NO2, and the second switch K2 in sequence, thereby keeping the contacts continuously closed, that is, the closing coil X1 can be energized and self-energized. Since the first normally closed contact NC1 of the closing relay 100 is disconnected from the first switch K1, even if the fourth normally open contact NO4 and the fourth switch K4 are closed, the second power supply 400 cannot supply power to the opening coil X2, that is, the opening coil X2 cannot be energized and self-energized, thus simulating the closing function of the disconnecting switch.
[0064] The tripping process of the disconnector switch analog circuit 10 is as follows:
[0065] When the positive power supply terminal V2+ of the trip coil X2 receives a pulse signal, the trip coil X2 is energized, thereby controlling the moving contact of the third switch K3 to close with the third normally open contact NO3, and the moving contact of the fourth switch K4 to close with the fourth normally open contact NO4. Since the closing coil X1 does not receive a pulse signal, the moving contact of the first switch K1 closes with the first normally closed contact NC1.
[0066] At this time, the second power supply 400 continuously supplies power to the positive power supply terminal V2+ of the trip coil X2 through the first normally closed contact NC1, the first switch K1, the fourth normally open contact NO4, and the fourth switch K4 in sequence, thereby keeping the contacts continuously closed, that is, the trip coil X2 can be energized and self-energized. Since the third normally closed contact NC3 of the trip relay 200 is disconnected from the third switch K3, even if the second normally open contact NO2 and the second switch K2 are closed, the first power supply 300 cannot supply power to the closing coil X1, that is, the closing coil X1 cannot be energized and self-energized, thus simulating the tripping function of the disconnecting switch.
[0067] Optionally, to ensure that the pulse signal can be received by the closing relay 100 or the opening relay 200, the transmission of the pulse signal can be redundantly designed. For example, the operation of sending the pulse signal to the opening relay 200 is repeated three times; if all three attempts fail, it indicates that the opening has failed.
[0068] Furthermore, to avoid current backflow at the positive power supply terminal V1+ of the closing coil X1, in this embodiment, the isolating switch analog circuit 10 further includes a first diode D1 and a second diode D2. The cathodes of both the first diode D1 and the second diode D2 are connected to the positive power supply terminal V1+ of the closing coil X1. The anode of the first diode D1 is used to receive pulse signals, and the anode of the second diode D2 is connected to the stationary contact of the second switch K2.
[0069] Similarly, to avoid current backflow at the positive power supply terminal V2+ of the trip coil X2, the isolating switch analog circuit 10 also includes a third diode D3 and a fourth diode D4. The cathodes of both the third diode D3 and the fourth diode D4 are connected to the positive power supply terminal V2+ of the trip coil X2. The anode of the third diode D3 is used to receive pulse signals, and the anode of the fourth diode D4 is connected to the stationary contact of the fourth switch K4.
[0070] Furthermore, when current flows through a relay coil, an induced electromotive force (EMF) is generated across its terminals. When the current disappears, this induced EMF exerts a reverse voltage on the components in the circuit. If this reverse voltage exceeds the reverse breakdown voltage of the components, it will damage them.
[0071] In view of this, please refer to Figure 3 In one alternative implementation, the isolation switch analog circuit 10 further includes a first freewheeling diode D5 and a second freewheeling diode D6.
[0072] In this circuit, the cathode of the first freewheeling diode D5 is connected to the positive power supply terminal V1+ of the closing coil X1, and the anode of the first freewheeling diode D5 is connected to the negative power supply terminal V1- of the closing coil X1. The cathode of the second freewheeling diode D6 is connected to the positive power supply terminal V2+ of the opening coil X2, and the anode of the second freewheeling diode D6 is connected to the negative power supply terminal V2- of the opening coil X2.
[0073] In addition, since the disconnecting switch will output a level for feedback when it receives a pulse signal to close or open the circuit, the disconnecting switch analog circuit 10 in this embodiment of the application also includes a first resistor R1 and a second resistor R2.
[0074] One end of the first resistor R1 is connected to the stationary contact of the first switch K1, and the other end of the first resistor R1 serves as the closing level detection port IO_DI_1.
[0075] One end of the second resistor R2 is connected to the stationary contact of the third switch K3, and the other end of the second resistor R2 serves as the tripping level detection port IO_DI_2.
[0076] For the closing relay 100, when the positive power supply terminal V1+ of the closing coil X1 does not receive a pulse signal (i.e., when the closing coil X1 is not energized), the moving contact of the first switch K1 closes with the first normally closed contact NC1, which is equivalent to one end of the first resistor R1 being connected to the second power supply 400. Therefore, the closing level detection port IO_DI_1 is at a high level. When the positive power supply terminal V1+ of the closing coil X1 receives a pulse signal, the moving contact of the first switch K1 closes with the first normally open contact NO1, which is equivalent to one end of the first resistor R1 being grounded. Therefore, the closing level detection port IO_DI_1 is at a low level.
[0077] In other words, when the positive power supply terminal V1+ of the closing coil X1 receives a pulse signal, the closing coil X1 is energized and self-primes, while the opening coil X2 cannot be energized and self-primed, and the voltage at the closing level detection port IO_DI_1 changes from high level to low level (i.e., the closing level detection port IO_DI_1 outputs a low level), thereby simulating the closing function of the disconnecting switch.
[0078] Similarly, when the positive power supply terminal V2+ of the trip coil X2 receives a pulse signal, the trip coil X2 is energized and self-primes, while the closing coil X1 cannot be energized and self-primes. Furthermore, the voltage at the trip level detection port IO_DI_2 changes from high level to low level (i.e., the trip level detection port IO_DI_2 outputs a low level), thereby simulating the tripping function of the disconnecting switch.
[0079] Furthermore, to more intuitively observe the operating state of the disconnector switch analog circuit 10, please refer to [link / reference needed]. Figure 4 In this embodiment of the application, the disconnector switch analog circuit 10 further includes a closing indicator module 500 and a opening indicator module 600.
[0080] One end of the closing indicator module 500 is connected to the stationary contact of the second switch K2, and the other end of the closing indicator module 500 is grounded. One end of the opening indicator module 600 is connected to the stationary contact of the fourth switch K4, and the other end of the opening indicator module 600 is grounded.
[0081] Optionally, the closing indicator module 500 includes a first light-emitting diode (LED) D7. The anode of the first LED D7 is connected to the stationary contact of the second switch K2, and the cathode of the first LED D7 is grounded. Further, to protect the first LED D7, the closing indicator module 500 also includes a third resistor R3. One end of the third resistor R3 is connected to the cathode of the first LED D7, and the other end of the third resistor R3 is grounded.
[0082] The tripping indicator module 600 includes a second light-emitting diode (LED) D8. The anode of the second LED D8 is connected to the stationary contact of the fourth switch K4, and the cathode of the second LED D8 is grounded. Furthermore, to protect the second LED D8, the tripping indicator module 600 also includes a fourth resistor R4. One end of the fourth resistor R4 is connected to the cathode of the second LED D8, and the other end of the fourth resistor R4 is grounded.
[0083] In addition, to improve signal quality, in one optional embodiment, the isolation switch analog circuit 10 further includes a first filter capacitor C1 and a second filter capacitor C2.
[0084] In this circuit, one end of the first filter capacitor C1 is connected to the positive power supply terminal V1+ of the closing coil X1, and the other end of the first filter capacitor C1 is grounded. One end of the second filter capacitor C2 is connected to the positive power supply terminal V2+ of the opening coil X2, and the other end of the second filter capacitor C2 is grounded.
[0085] To better understand the technical solution of this application, please refer to Figure 5 The following describes the entire closing process of the isolating switch simulation circuit 10.
[0086] When the positive power supply terminal V1+ of the closing coil X1 receives a pulse signal, the closing coil X1 is energized, thereby controlling the moving contact of the first switch K1 to close with the first normally open contact NO1, and the moving contact of the second switch K2 to close with the second normally open contact NO2. Since the opening coil X2 does not receive a pulse signal, the moving contact of the third switch K3 closes with the third normally closed contact NC3.
[0087] At this time, the first power supply 300 continuously supplies power to the positive power supply terminal V1+ of the closing coil X1 through the third normally closed contact NC3, the third switch K3, the second resistor R2, the second normally open contact NO2, the second switch K2, and the second diode D2 in sequence to keep the contacts continuously closed. Simultaneously, the closing level detection port IO_DI_1 outputs a low level. Furthermore, the current supplied by the first power supply 300 also flows to the anode of the first light-emitting diode D7, causing D7 to light up, thus allowing direct observation that the isolating switch analog circuit 10 is in the closed state.
[0088] Furthermore, since the first normally closed contact NC1 of the closing relay 100 is disconnected from the first switch K1, even if the fourth normally open contact NO4 and the fourth switch K4 are closed, the second power supply 400 cannot supply power to the trip coil X2, that is, the trip coil X2 cannot be energized and self-primed, thereby simulating the closing function of the disconnecting switch.
[0089] Please see Figure 6 The entire tripping process of the disconnector switch analog circuit 10 is as follows:
[0090] When the positive power supply terminal V2+ of the trip coil X2 receives a pulse signal, the trip coil X2 is energized, thereby controlling the moving contact of the third switch K3 to close with the third normally open contact NO3, and the moving contact of the fourth switch K4 to close with the fourth normally open contact NO4. Since the closing coil X1 does not receive a pulse signal, the moving contact of the first switch K1 closes with the first normally closed contact NC1.
[0091] At this time, the second power supply 400 continuously supplies power to the positive power supply terminal V2+ of the trip coil X2 through the first normally closed contact NC1, the first switch K1, the first resistor R1, the fourth normally open contact NO4, the fourth switch K4, and the fourth diode D4 in sequence to keep the contacts continuously closed. Simultaneously, the trip level detection port IO_DI_2 outputs a low level. Furthermore, the current supplied by the second power supply 400 also flows to the anode of the second light-emitting diode D8, causing D8 to light up, thus allowing direct observation that the isolating switch analog circuit 10 is in the tripped state.
[0092] Furthermore, since the third normally closed contact NC3 of the trip relay 200 is disconnected from the third switch K3, even if the second normally open contact NO2 and the second switch K2 are closed, the first power supply 300 cannot supply power to the closing coil X1, that is, the closing coil X1 cannot be energized and self-primed, thereby simulating the tripping function of the disconnecting switch.
[0093] The combination of the two logics above completes the linkage between the closing relay 100 and the opening relay 200, simulating that the disconnecting switch only exists in one state, namely closed or open, which greatly reduces the testing cost.
[0094] Optionally, embodiments of this application also provide a disconnector simulation system, which includes a disconnector simulation circuit 10 as described in any of the foregoing embodiments.
[0095] In summary, this application provides a circuit and system for simulating a disconnecting switch. Since pulse signals cannot provide continuous power, without other control circuits, this application can continuously power the relays via the power supply when triggered by a pulse signal, using only two relays, two power supplies, and multiple diodes. The normally open and normally closed contacts within the two relays enable logical linkage between the closing and opening relays. This ensures that when one relay is energized and self-priming, the other relay cannot be energized and self-priming, simulating that the disconnecting switch has only one state (i.e., closed or open). Simultaneously, the level detection port of the energized relay outputs a low level, allowing for direct observation of the relay's state via LEDs, thus simulating the function of the disconnecting switch. This significantly saves testing area and cost, and improves testing convenience and efficiency.
[0096] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
[0097] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A disconnector switch analog circuit, characterized in that, The isolation switch simulation circuit includes: a closing relay, a opening relay, a first power supply, and a second power supply. The first port of the closing relay is connected to the second power supply, and the second port of the closing relay is connected to the third port of the opening relay; the first port of the opening relay is connected to the first power supply, and the second port of the opening relay is connected to the third port of the closing relay. When the closing relay receives a pulse signal, the first and second ports of the closing relay are disconnected, the first and second ports of the opening relay are closed, and the closing relay is energized and self-closing. When the tripping relay receives a pulse signal, the first and second ports of the tripping relay are disconnected, the first and second ports of the closing relay are closed, and the tripping relay is energized and self-primed.
2. The isolating switch analog circuit according to claim 1, characterized in that, The closing relay includes: a closing coil, a first normally closed contact, a second normally closed contact, a first normally open contact, a second normally open contact, a first switch, and a second switch; the opening relay includes: an opening coil, a third normally closed contact, a fourth normally closed contact, a third normally open contact, a fourth normally open contact, a third switch, and a fourth switch; The first normally closed contact is connected to the second power supply, the first normally open contact is grounded, the stationary contact of the first switch is connected to the fourth normally open contact, the stationary contact of the second switch is connected to the positive power supply terminal of the closing coil, and the negative power supply terminal of the closing coil is grounded. The third normally closed contact is connected to the first power supply, the third normally open contact is grounded, the stationary contact of the third switch is connected to the second normally open contact, the stationary contact of the fourth switch is connected to the positive power supply terminal of the trip coil, and the negative power supply terminal of the trip coil is grounded. When a pulse signal is received at the positive power supply terminal of the closing coil, the moving contact of the first switch closes with the first normally open contact, the moving contact of the third switch closes with the third normally closed contact, the moving contact of the second switch closes with the second normally open contact, and the closing coil is energized and self-primed. When a pulse signal is received at the positive power supply terminal of the trip coil, the moving contact of the third switch closes with the third normally open contact, the moving contact of the first switch closes with the first normally closed contact, the moving contact of the fourth switch closes with the fourth normally open contact, and the trip coil is energized and self-primed.
3. The isolating switch analog circuit according to claim 2, characterized in that, The isolation switch analog circuit also includes a first diode, a second diode, a third diode, and a fourth diode; The cathodes of the first diode and the second diode are both connected to the positive power supply terminal of the closing coil. The anode of the first diode is used to receive pulse signals, and the anode of the second diode is connected to the stationary contact of the second switch. The cathodes of the third diode and the fourth diode are both connected to the positive power supply terminal of the trip coil. The anode of the third diode is used to receive pulse signals, and the anode of the fourth diode is connected to the stationary contact of the fourth switch.
4. The isolating switch analog circuit according to claim 2, characterized in that, The isolation switch analog circuit also includes a first freewheeling diode and a second freewheeling diode. The cathode of the first freewheeling diode is connected to the positive power supply terminal of the closing coil, and the anode of the first freewheeling diode is connected to the negative power supply terminal of the closing coil. The cathode of the second freewheeling diode is connected to the positive power supply terminal of the trip coil, and the anode of the second freewheeling diode is connected to the negative power supply terminal of the trip coil.
5. The isolating switch analog circuit according to claim 2, characterized in that, The isolation switch analog circuit also includes a first resistor and a second resistor; One end of the first resistor is connected to the stationary contact of the first switch, and the other end of the first resistor serves as a closing level detection port. One end of the second resistor is connected to the stationary contact of the third switch, and the other end of the second resistor serves as the tripping level detection port.
6. The isolating switch analog circuit according to claim 2, characterized in that, The disconnector switch simulation circuit also includes a closing indicator module and a closing indicator module; One end of the closing indicator module is connected to the stationary contact of the second switch, and the other end of the closing indicator module is grounded. One end of the trip indicator module is connected to the stationary contact of the fourth switch, and the other end of the trip indicator module is grounded.
7. The isolating switch analog circuit according to claim 6, characterized in that, The closing indicator module includes a first light-emitting diode, the anode of which is connected to the stationary contact of the second switch, and the cathode of which is grounded. The trip indicator module includes a second light-emitting diode, the anode of which is connected to the stationary contact of the fourth switch, and the cathode of which is grounded.
8. The isolating switch analog circuit according to claim 7, characterized in that, The closing indicator module also includes a third resistor, one end of which is connected to the cathode of the first light-emitting diode, and the other end of which is grounded. The circuit breaker indicator module also includes a fourth resistor, one end of which is connected to the cathode of the second light-emitting diode, and the other end of which is grounded.
9. The isolating switch analog circuit according to claim 2, characterized in that, The isolation switch analog circuit also includes a first filter capacitor and a second filter capacitor. One end of the first filter capacitor is connected to the positive power supply terminal of the closing coil, and the other end of the first filter capacitor is grounded. One end of the second filter capacitor is connected to the positive power supply terminal of the trip coil, and the other end of the second filter capacitor is grounded.
10. A disconnector switch simulation system, characterized in that, The disconnector switch simulation system includes the disconnector switch simulation circuit as described in any one of claims 1-9.