CN212435430U - High-reliability main and standby alternating current power supply switching control system - Google Patents
High-reliability main and standby alternating current power supply switching control system Download PDFInfo
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- CN212435430U CN212435430U CN202021514725.XU CN202021514725U CN212435430U CN 212435430 U CN212435430 U CN 212435430U CN 202021514725 U CN202021514725 U CN 202021514725U CN 212435430 U CN212435430 U CN 212435430U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
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Abstract
The utility model discloses a high-reliability main standby alternating current power supply switching control system, which comprises a three-phase output circuit, wherein the three-phase output circuit is electrically connected with a first power supply, a second power supply, a first switching module, a first default phase detection module, a second switching module and a second default phase detection module; the first switching module comprises a K1 relay and a K2 relay; the second switching module comprises a K3 relay and a K4 relay; normally closed contacts of a K1 relay and a K2 relay are connected in series between the K3 relay and the three-phase output circuit, and normally closed contacts of a K3 relay and a K4 relay are connected in series between the K1 relay and the three-phase output circuit; a four-point change-over switch S is arranged between the first power supply and the second power supply, and two contacts of the four-point change-over switch S are respectively connected with the K2 relay and the K4 relay in series. The utility model discloses not only can improve the reliability of switching, still have simple structure, convenient to use, the security in utilization is high and detect the high advantage of accuracy.
Description
Technical Field
The utility model relates to a power supply technology, especially high reliable activestandby alternating current power supply switch control system.
Background
With the improvement of the economic living standard of China, the electric equipment is visible everywhere in our life, and electricity is indispensable no matter in small size to families or in large size to the industrial field; in some important electric equipment in the industrial field, once the power supply is stopped, the equipment is easily damaged, and even casualties can be caused; in order to avoid this situation, when the power supply circuit is designed, the standby power supply is connected to the power supply circuit of the important electric equipment, so as to form a dual-power supply system.
The existing alternating current dual-power supply system is mainly realized by a controller, but a circuit for controlling dual-power supply by using the controller needs to be matched with various sensors and other electronic elements, so that the overall structure is complex; when one of the electronic components or the sensor fails, a detection error is easily caused, and the reliability of power switching is further affected. Therefore, the existing alternating current dual-power switching control system has the phenomena of lower use reliability and more complex structure.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high reliable activestandby alternating current power supply switches control system. The utility model discloses not only can improve the reliability of switching, still have simple structure's advantage.
The technical scheme of the utility model: the high-reliability main and standby alternating current power supply switching control system comprises a three-phase output circuit, wherein a first power supply and a second power supply are electrically connected to the three-phase output circuit and are arranged in parallel; a first switching module and a first open-phase detection module are sequentially arranged between the first power supply and the three-phase output circuit in parallel, and the first open-phase detection module and the first switching module are arranged in series; a second switching module and a second open-phase detection module are sequentially arranged between the second power supply and the three-phase output circuit in parallel, and the second open-phase detection module and the second switching module are arranged in series; the first switching module comprises a K1 relay and a K2 relay which are arranged in parallel, and a first normally open switch of the K1 relay is connected between a first power supply and the three-phase output circuit in series; the second switching module comprises a K3 relay and a K4 relay which are arranged in parallel, and a first normally open switch of the K3 relay is connected between the second power supply and the three-phase output circuit in series; normally closed contacts of the K1 relay and the K2 relay are connected between the K3 relay and the three-phase output circuit in series, and normally closed contacts of the K3 relay and the K4 relay are connected between the K1 relay and the three-phase output circuit in series; a four-point change-over switch S is arranged between the first power supply and the second power supply, a first contact of the four-point change-over switch S is connected with the K2 relay in series, and a second contact of the four-point change-over switch S is connected with the K4 relay in series.
In the foregoing high-reliability main-standby alternating-current power supply switching control system, the three-phase output circuit includes a zero line N, and one side of the zero line N is provided with a live line a, a live line B, and a live line C that are distributed in parallel.
In the foregoing high-reliability main-standby alternating current power supply switching control system, the first open-phase detection module includes a KA1 relay, a KB1 relay, and a KC1 relay, and the KA1 relay is connected in parallel between the zero line N and the live line a; the KB1 relay is connected in parallel with the live wire B and the zero wire N, and the KC1 relay is connected in parallel with the live wire C and the zero wire N; the normally open switches of the KA1 relay, the KB1 relay and the KC1 relay are connected in series with the connecting circuit of the first switching module.
In the foregoing high-reliability main-standby alternating current power supply switching control system, the first open-phase detection module includes a KA2 relay, a KB2 relay, and a KC2 relay, and the KA2 relay is connected in parallel between the zero line N and the live line a; the KB2 relay is connected in parallel with the live wire B and the zero wire N, and the KC2 relay is connected in parallel with the live wire C and the zero wire N; the normally open switches of the KA2 relay, the KB2 relay and the KC2 relay are connected in series on the connecting circuit of the second switching module.
In the foregoing high-reliability main-standby alternating-current power supply switching control system, the first switching module is provided with a first indicator light, and the first indicator light is connected in parallel with the K1 relay and the K2 relay; and a second normally open contact of the K1 relay is arranged in series with the first indicator light.
In the foregoing high-reliability main-standby alternating-current power supply switching control system, a second indicator light is arranged on the second switching module, and the second indicator light is connected in parallel with the K3 relay and the K4 relay; the second normally open contact of the K3 relay is placed in series with the second indicator light.
In the foregoing high-reliability main-standby alternating-current power supply switching control system, a third indicator light, a fourth indicator light and a fifth indicator light are arranged between the first power supply and the three-phase output circuit, and the third indicator light is connected in parallel with the KA1 relay; the fourth indicator light is arranged in parallel with the KB1 relay, and the fifth indicator light is arranged in parallel with the KC1 relay.
In the foregoing high-reliability main-standby alternating-current power supply switching control system, a sixth indicator light, a seventh indicator light and an eighth indicator light are arranged between the second power supply and the three-phase output circuit, and the sixth indicator light is connected in parallel with the KA2 relay; the seventh indicator light is arranged in parallel with the KB2 relay, and the eighth indicator light is arranged in parallel with the KC2 relay.
In the foregoing high-reliability main/standby ac power supply switching control system, a first air switch is connected in series between the first power supply and the three-phase output circuit; and a second air switch is connected in series between the second power supply and the three-phase output circuit.
In the foregoing high-reliability main-standby alternating-current power supply switching control system, the three-phase output circuit is electrically connected to a storage battery, a three-phase rectifier is installed between a charging port of the storage battery and the three-phase output circuit, and a third air switch is arranged between the three-phase rectifier and the storage battery; a three-phase inverter is arranged between the discharge port of the storage battery and the three-phase output circuit; a fourth air switch is connected between the three-phase inverter and the storage battery in series, and normally open contacts of a K1 relay and a K3 relay are connected between the fourth air switch and the three-phase inverter in series; the first power supply, the second power supply and the storage battery are arranged in parallel.
Compared with the prior art, the utility model improves the existing AC power supply switching control circuit, and can automatically detect whether the power supply of the first power supply and the second power supply is normal or not through the first default phase detection module and the second default phase detection module by arranging the first default phase detection module and the second default phase detection module; the first open-phase detection module is connected with the first switching module in series, and the second open-phase detection module is connected with the second switching module in series, so that the start and stop of the first switching module and the second switching module are controlled, the automatic switching between the first power supply and the second power supply is realized, and the operation is convenient; normally closed switches of a K1 relay and a K2 relay are connected in series with a K3 relay, and normally closed switches of a K3 relay and a K4 relay are connected in series with a K1 relay, so that a relay self-locking structure between a first switching module and a second switching module is formed, stable switching of connection between the first switching module and the second switching module is guaranteed, and switching reliability is improved; the self-locking structure formed by combining the plurality of relays and the plurality of relays ensures that the whole structure does not need to be provided with different electric elements, so that the whole structure is simpler; simultaneously, through setting up four change over switch S, four change over switch S' S both sides contact is established ties with K2 relay and K4 relay respectively to can realize the main, assist the transform between first power and the second power, and then made things convenient for the use. In addition, the utility model discloses still pass through KA1 relay, KB1 relay and KC1 relay, pass through KA1 relay, KB1 relay and KC1 relay and detect respectively whether the circular telegram between first power and live wire A, live wire B and live wire C is normal; similarly, the KA2 relay, the KB2 relay and the KC2 relay are utilized, and the KA2 relay, the KB2 relay and the KC2 relay are utilized to respectively detect whether the electrification between the second power supply and the live wire A, the live wire B and the live wire C is normal or not, so that the detection accuracy is improved; whether the first switching module or the second switching module works normally or not is directly displayed by the aid of the first indicator lamp and the second indicator lamp through arrangement of the first indicator lamp and the second indicator lamp, so that the use is facilitated; by arranging the third indicator light, the fourth indicator light, the fifth indicator light, the sixth indicator light, the seventh indicator light and the eighth indicator light, the condition that one phase of the first power supply and the second power supply is lost can be directly judged according to the brightness conditions of the third indicator light, the fourth indicator light, the fifth indicator light, the sixth indicator light, the seventh indicator light and the eighth indicator light, so that the use is convenient; the first air switch is arranged on the first power supply, the second air switch is arranged on the second power supply, and the effect of immediately cutting off power supply can be realized by utilizing the first air switch and the second air switch under the conditions of short circuit, overload and the like, so that the use safety is improved; the storage battery which is electrically connected with the first power supply and the second power supply in parallel is arranged on the three-phase output circuit, and the storage battery can be used for performing emergency power supply under the condition that the first power supply and the second power supply are both out of power, so that the influence on electric equipment is reduced, and the use safety is further improved; by arranging the three-phase inverter and the three-phase rectifier, the storage battery can be charged by using the three-phase rectifier under the condition that the storage battery is not supplied with power; and the three-phase inverter can change the direct current in the battery into alternating current to supply power, has improved the power supply timeliness under the emergency situation, has further made things convenient for the use. Therefore, the utility model discloses not only can improve the reliability of switching, still have simple structure, convenient to use, the security in utilization is high and detect the high advantage of accuracy.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention;
fig. 2 is a circuit diagram of the present invention.
The labels in the figures are: 1-a first power supply, 2-a second power supply, 3-K1 relay, 4-K2 relay, 5-K3 relay, 6-K4 relay, 7-four-point transfer switch S, 8-zero line N, 9-live line A, 10-live line B, 11-live line C, 12-KA1 relay, 13-KB1 relay, 14-KC1 relay, 15-KA2 relay, 16-KB2 relay, 17-KC2 relay, 18-a first indicator light, 19-a second indicator light, 20-a third indicator light, 21-a fourth indicator light, 22-a fifth indicator light, 23-a sixth indicator light, 24-a seventh indicator light, 25-an eighth indicator light, 26-a first air switch, 27-a second air switch, 28-storage battery, 29-three-phase rectifier, 30-third air switch, 31-three-phase inverter, 32-fourth air switch.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
Examples are given. A high-reliability main-standby alternating current power supply switching control system, which is formed as shown in fig. 1 and 2 and comprises a three-phase output circuit, wherein the three-phase output circuit is electrically connected with a first power supply 1 and a second power supply 2, and the first power supply 1 and the second power supply 2 are arranged in parallel; a first switching module and a first open-phase detection module are sequentially arranged between the first power supply 1 and the three-phase output circuit in parallel, and the first open-phase detection module and the first switching module are arranged in series; a second switching module and a second open-phase detection module are sequentially arranged between the second power supply 2 and the three-phase output circuit in parallel, and the second open-phase detection module and the second switching module are arranged in series; the first switching module comprises a K1 relay 3 and a K2 relay 4 which are arranged in parallel, and a first normally open switch of the K1 relay 3 is connected between the first power supply 1 and the three-phase output circuit in series; the second switching module comprises a K3 relay 5 and a K4 relay 6 which are arranged in parallel, and a first normally open switch of the K3 relay 5 is connected between the second power supply 2 and the three-phase output circuit in series; normally closed contacts of the K1 relay 3 and the K2 relay 4 are connected between the K3 relay 5 and the three-phase output circuit in series, and normally closed contacts of the K3 relay 5 and the K4 relay 6 are connected between the K1 relay 3 and the three-phase output circuit in series; a four-point change-over switch S7 is arranged between the first power supply 1 and the second power supply 2, a first contact of a four-point change-over switch S7 is connected with the K2 relay 4 in series, and a second contact of a four-point change-over switch S7 is connected with the K4 relay 6 in series.
The three-phase output circuit comprises a zero line N8, and a live wire A9, a live wire B10 and a live wire C11 which are distributed in parallel are arranged on one side of a zero line N8; the first open-phase detection module comprises a KA1 relay 12, a KB1 relay 13 and a KC1 relay 14, wherein the KA1 relay 12 is connected between a zero line N8 and a live line A9 in parallel; the KB1 relay 13 is connected in parallel with a live wire B10 and a zero wire N8, and the KC1 relay 14 is connected in parallel with a live wire C11 and a zero wire N8; the normally open switches of the KA1 relay 12, the KB1 relay 13 and the KC1 relay 14 are connected in series on the connecting circuit of the first switching module; the first open-phase detection module comprises a KA2 relay 15, a KB2 relay 16 and a KC2 relay 17, wherein the KA2 relay 15 is connected between a zero line N8 and a live line A9 in parallel; the KB2 relay 16 is connected in parallel with a live wire B10 and a zero wire N8, and the KC2 relay 17 is connected in parallel with a live wire C11 and a zero wire N8; the normally open switches of the KA2 relay 15, the KB2 relay 16 and the KC2 relay 17 are connected in series on the connecting circuit of the second switching module; the first switching module is provided with a first indicator light 18, and the first indicator light 18 is connected with the K1 relay 3 and the K2 relay 4 in parallel; the second normally open contact of the K1 relay 3 is arranged in series with the first indicator light 18; the second switching module is provided with a second indicator light 19, and the second indicator light 19 is connected with the K3 relay 5 and the K4 relay 6 in parallel; the second normally open contact of the K3 relay 5 is arranged in series with the second indicator light 19; a third indicator light 20, a fourth indicator light 21 and a fifth indicator light 22 are arranged between the first power supply 1 and the three-phase output circuit, and the third indicator light 20 is connected with the KA1 relay 12 in parallel; the fourth indicator light 21 is arranged in parallel with the KB1 relay 13, and the fifth indicator light 22 is arranged in parallel with the KC1 relay 14; a sixth indicator lamp 23, a seventh indicator lamp 24 and an eighth indicator lamp 25 are arranged between the second power supply 2 and the three-phase output circuit, and the sixth indicator lamp 23 is connected with the KA2 relay 15 in parallel; the seventh indicator light 24 is arranged in parallel with the KB2 relay 16, and the eighth indicator light 25 is arranged in parallel with the KC2 relay 17; a first air switch 26 is connected in series between the first power supply 1 and the three-phase output circuit; a second air switch 27 is connected in series between the second power supply 2 and the three-phase output circuit; the three-phase output circuit is electrically connected with a storage battery 28, a three-phase rectifier 29 is installed between a charging port of the storage battery 28 and the three-phase output circuit, and a third air switch 30 is arranged between the three-phase rectifier 29 and the storage battery 28; a three-phase inverter 31 is installed between the discharge port of the storage battery 28 and the three-phase output circuit; a fourth air switch 32 is connected in series between the three-phase inverter 31 and the battery 28, and normally open contacts of a K1 relay 3 and a K3 relay 5 are connected in series between the fourth air switch 32 and the three-phase inverter 31; the first power supply 1, the second power supply 2 and the storage battery 28 are arranged in parallel.
The working principle is as follows: the first air switch 26, the second air switch 27, the third air switch 30 and the fourth air switch 32 are all in a closed state prior to use.
When the first power supply 1 is used as a main power supply and the second power supply 2 is used as an auxiliary power supply, the contact S1(1, 2) of the four-point switch S7 is switched on; when the three-phase circuit of the first power supply 1 is completely and normally electrified, the KA1 relay 12, the KB1 relay 13 and the KC1 relay 14 can be electrically excited, and meanwhile, the circuits of the third indicator lamp 20, the fourth indicator lamp 21 and the fifth indicator lamp 22 are all communicated, so that the third indicator lamp 20, the fourth indicator lamp 21 and the fifth indicator lamp 22 are synchronously lightened, and an operator can clearly know that the first power supply 1 is normally powered; after the KA1 relay 12, the KB1 relay 13 and the KC1 relay 14 are electrically excited, normally open contacts KA1(1, 2), KB1(1, 2) and KC1(1, 2) of the KA1 relay 12, the KB1 relay 13 and the KC1 relay 14 are switched on, at this time, a circuit of the first switching module is communicated, so that the K1 relay 3 and the K2 relay 4 are electrically excited, when the K1 relay 3 and the K2 relay 4 are electrically excited, normally open contacts K1(1, 2), K1(5, 6), K1(7, 8) K1(9, 10) and K1(11, 12) of the K1 relay 3 are switched on, and after the K1(1, 2) is switched on, a circuit of the first indicator lamp 18 is switched on and is lightened, so that an operator knows that the first power supply 1 supplies power definitely; when the K1(5, 6), the K1(7, 8), the K1(9, 10) and the K1(11, 12) are switched on, the first power supply 1 is communicated with the three-phase output circuit, so that the first power supply 1 supplies power; normally closed contacts K1(3, 4) and K2(1, 2) of the K1 relay 3 and the K2 relay 4 are both opened, so that an electrified circuit of the K3 relay 5 is opened, and further normally open contacts K3(1, 2), K3(5, 6), K3(7, 8) K3(9, 10) and K3(11, 12) of the K3 relay 5 are opened, so that the second power supply 2 is communicated and disconnected with the three-phase output circuit, and therefore the second power supply 2 does not supply power.
When power is not supplied to one or more phases of the first power source 1 (i.e. power is not supplied to a1, B1 or/and C1 in fig. 2), and the second power source 2 is normally supplied (i.e. the KA2 relay 15, the KB2 relay 16 and the KC2 relay 17 are electrically excited), the corresponding KA1 relay 12, the KB1 relay 13 or the KC1 relay 14 is electrically disconnected, one or more of the normally open contacts KA1(1, 2), KB1(1, 2) and KC1(1, 2) of the corresponding disconnected KA1 relay 12, KB1 relay 13 or KC1 relay 14 are switched from a closed state to an open state, the communication circuit of the K1 relay 3 and the K2 relay 4 is switched from a communication state to an open state, the normally closed contacts KA 1(3, 4) and K2(1, 2) of the K1 relay 3 and the K2 relay 4 are switched from a closed state to an open state, and the normally closed contact 1 of the K1 relay 3 is switched from a closed state to an open state, 4) K1(13, 14) and K1(15, 16) will close; after the normally closed contacts K1(3, 4) are switched on, the K3 relay 5 is electrically excited, so that the normally open contacts K3(5, 6), K3(7, 8), K3(9, 10) and K3(11, 12) of the K3 relay 5 are switched on, and at the moment, the second power supply 2 can supply power; when power is not supplied to one or more phases of the second power supply 2 (i.e., power is not supplied to a phase a2, a phase B2, or/and a phase C2 in fig. 2), one or more of the KA2 relay 15, the KB2 relay 16, and the KC2 relay 17 are in a power-off state, the connection circuit of the K3 relay 5 and the K4 relay 6 is also in an off state, and after the K3 relay 5 is powered off, the normally-closed contacts K3(3, 4), K3(13, 14), and K3(15, 16) of the K3 relay 5 are also changed from the off state to the on state, so that the discharge circuit of the battery 28 is connected, and the direct current in the battery 28 is converted into three-phase alternating current through the three-phase inverter 31, and the electric equipment is supplied with power through the three-phase output circuit.
When the second power supply 2 is used as a main power supply and the first power supply 1 is used as an auxiliary power supply, the contact S1(3, 4) of the four-point switch S7 is switched on; when the three-phase circuit of the second power supply 2 is completely and normally electrified, the KA2 relay 15, the KB2 relay 16 and the KC2 relay 17 can be electrically excited, and meanwhile, the circuits of the sixth indicator lamp 23, the seventh indicator lamp 24 and the eighth indicator lamp 25 are all communicated, so that the sixth indicator lamp 23, the seventh indicator lamp 24 and the eighth indicator lamp 25 are synchronously lightened, and an operator can clearly know that the second power supply 2 is normally powered; after the KA2 relay 15, the KB2 relay 16 and the KC2 relay 17 are electrically excited, normally open contacts KA2(1, 2), KB2(1, 2) and KC2(1, 2) of the KA2 relay 15, KB2 relay 16 and KC2 relay 17 are switched on, at this time, a circuit of the second switching module is communicated, so that the K3 relay 5 and the K4 relay 6 are electrically excited, when the K3 relay 5 and the K4 relay 6 are electrically excited, normally open contacts K3(1, 2), K3(5, 6), K3(7, 8) K3(9, 10) and K3(11, 12) of the K3 relay 5 are switched on, and after the K3(1, 2) is switched on, a circuit of the second indicator lamp 19 is switched on and is lightened, so that an operator knows that the second power supply 2 supplies power definitely; when the K3(5, 6), the K3(7, 8), the K3(9, 10) and the K3(11, 12) are switched on, the second power supply 2 is communicated with the three-phase output circuit, so that the second power supply 2 supplies power; normally closed contacts K3(3, 4) and K4(1, 2) of the K3 relay 5 and the K4 relay 6 are both opened, so that an electrified circuit of the K1 relay 3 is opened, and further normally open contacts K1(1, 2), K1(5, 6), K1(7, 8), K1(9, 10) and K1(11, 12) of the K1 relay 3 are opened, so that the first power supply 1 is communicated and disconnected with the three-phase output circuit, and therefore the first power supply 1 does not supply power.
When power is not supplied to one or more phases of the second power source 2 (i.e. power is not supplied to a2, B2 or/and C2 in fig. 2), and the first power source 1 is normally supplied (i.e. the KA1 relay 13, the KB1 relay 14 and the KC1 relay 15 are electrically excited), the corresponding KA2 relay 15, KB2 relay 16 and KC2 relay 17 are electrically disconnected, so that one or more of the normally open contacts KA2(1, 2), KB2(1, 2) and KC2(1, 2) of the disconnected KA2 relay 15, KB2 relay 16 and KC2 relay 17 are switched from a closed state to an open state, and further the communication circuit of the K3 and K4 relays 6 is switched from a communication state to an open state, and the normally closed contacts K2(3, 4) and K4(1, 2) of the K3 relays 5 and K4 are switched from an open state to a closed state, and the normally closed contacts K3 of the K3 are switched from a closed state to an open state, 4) K3(13, 14) and K3(15, 16) will close; after the normally closed contacts K3(3, 4) are switched on, the K1 relay 3 is electrically excited, so that the normally open contacts K1(5, 6), K1(7, 8), K1(9, 10) and K1(11, 12) of the K1 relay 3 are switched on, and at the moment, the first power supply 1 can supply power; when no power is supplied to one or more phases of the first power source 1 and the second power source 2 (i.e., one or more phases of a1, B1, C1, a2, B2 or/and C2 in fig. 2), one or more of the KA1 relay 12, the KB1 relay 13 and the KC1 relay 14 are in a power-off state, the connection circuit of the K1 relay 3 and the K2 relay 4 is also in an open state, and after the power of the K1 relay 3 is cut off, the normally closed contacts K1(3, 4), K1(13, 14) and K1(15, 16) of the K1 relay 3 are also changed from the open state to the closed state, so that the discharge circuit of the battery 28 is connected, and the direct current in the battery 28 is changed into three-phase alternating current through the three-phase inverter 31, and the electric equipment is supplied with power through the three-phase output circuit.
Claims (10)
1. High reliable activestandby alternating current power supply switches control system, its characterized in that: the power supply comprises a three-phase output circuit, wherein the three-phase output circuit is electrically connected with a first power supply (1) and a second power supply (2), and the first power supply (1) and the second power supply (2) are arranged in parallel; a first switching module and a first open-phase detection module are sequentially arranged between the first power supply (1) and the three-phase output circuit in parallel, and the first open-phase detection module and the first switching module are arranged in series; a second switching module and a second open-phase detection module are sequentially arranged between the second power supply (2) and the three-phase output circuit in parallel, and the second open-phase detection module and the second switching module are arranged in series; the first switching module comprises a K1 relay (3) and a K2 relay (4) which are arranged in parallel, and a first normally open switch of the K1 relay (3) is connected between a first power supply (1) and a three-phase output circuit in series; the second switching module comprises a K3 relay (5) and a K4 relay (6) which are arranged in parallel, and a first normally open switch of the K3 relay (5) is connected between the second power supply (2) and the three-phase output circuit in series; normally closed contacts of the K1 relay (3) and the K2 relay (4) are connected in series between the K3 relay (5) and the three-phase output circuit, and normally closed contacts of the K3 relay (5) and the K4 relay (6) are connected in series between the K1 relay (3) and the three-phase output circuit; a four-point change-over switch S (7) is arranged between the first power supply (1) and the second power supply (2), a first contact of the four-point change-over switch S (7) is connected with the K2 relay (4) in series, and a second contact of the four-point change-over switch S (7) is connected with the K4 relay (6) in series.
2. The high-reliability main/standby alternating-current power supply switching control system according to claim 1, characterized in that: the three-phase output circuit comprises a zero line N (8), and a live wire A (9), a live wire B (10) and a live wire C (11) which are distributed in parallel are arranged on one side of the zero line N (8).
3. The high-reliability main/standby alternating-current power supply switching control system according to claim 2, characterized in that: the first open-phase detection module comprises a KA1 relay (12), a KB1 relay (13) and a KC1 relay (14), wherein the KA1 relay (12) is connected between a zero line N (8) and a live line A (9) in parallel; a KB1 relay (13) is connected in parallel with a live wire B (10) and a zero wire N (8), and a KC1 relay (14) is connected in parallel with a live wire C (11) and a zero wire N (8); the normally open switches of the KA1 relay (12), the KB1 relay (13) and the KC1 relay (14) are connected in series with the connection circuit of the first switching module.
4. The high-reliability main/standby alternating-current power supply switching control system according to claim 2, characterized in that: the first open-phase detection module comprises a KA2 relay (15), a KB2 relay (16) and a KC2 relay (17), wherein the KA2 relay (15) is connected between a zero line N (8) and a live line A (9) in parallel; a KB2 relay (16) is connected in parallel with a live wire B (10) and a zero wire N (8), and a KC2 relay (17) is connected in parallel with a live wire C (11) and a zero wire N (8); the normally open switches of the KA2 relay (15), the KB2 relay (16) and the KC2 relay (17) are connected in series on the connecting circuit of the second switching module.
5. The high-reliability main/standby alternating-current power supply switching control system according to claim 1, characterized in that: the first switching module is provided with a first indicator light (18), and the first indicator light (18) is connected with the K1 relay (3) and the K2 relay (4) in parallel; the second normally open contact of the K1 relay (3) is arranged in series with the first indicator light (18).
6. The high-reliability main/standby alternating-current power supply switching control system according to claim 1, characterized in that: the second switching module is provided with a second indicator light (19), and the second indicator light (19) is connected with the K3 relay (5) and the K4 relay (6) in parallel; the second normally open contact of the K3 relay (5) is arranged in series with the second indicator light (19).
7. The high-reliability main/standby alternating-current power supply switching control system according to claim 4, characterized in that: a third indicator light (20), a fourth indicator light (21) and a fifth indicator light (22) are arranged between the first power supply (1) and the three-phase output circuit, and the third indicator light (20) is connected with the KA1 relay (12) in parallel; the fourth indicator light (21) is arranged in parallel with the KB1 relay (13), and the fifth indicator light (22) is arranged in parallel with the KC1 relay (14).
8. The high-reliability main/standby alternating-current power supply switching control system according to claim 5, characterized in that: a sixth indicator light (23), a seventh indicator light (24) and an eighth indicator light (25) are arranged between the second power supply (2) and the three-phase output circuit, and the sixth indicator light (23) is connected with the KA2 relay (15) in parallel; the seventh indicator light (24) is arranged in parallel with the KB2 relay (16), and the eighth indicator light (25) is arranged in parallel with the KC2 relay (17).
9. The high-reliability main/standby alternating-current power supply switching control system according to claim 1, characterized in that: a first air switch (26) is connected in series between the first power supply (1) and the three-phase output circuit; and a second air switch (27) is connected in series between the second power supply (2) and the three-phase output circuit.
10. The high-reliability main/standby alternating-current power supply switching control system according to any one of claims 1 to 9, characterized in that: the three-phase output circuit is electrically connected with a storage battery (28), a three-phase rectifier (29) is installed between a charging port of the storage battery (28) and the three-phase output circuit, and a third air switch (30) is arranged between the three-phase rectifier (29) and the storage battery (28); a three-phase inverter (31) is arranged between a discharge port of the storage battery (28) and the three-phase output circuit; a fourth air switch (32) is connected in series between the three-phase inverter (31) and the storage battery (28), and normally open contacts of a K1 relay (3) and a K3 relay (5) are connected in series between the fourth air switch (32) and the three-phase inverter (31); the first power supply (1), the second power supply (2) and the storage battery (28) are arranged in parallel.
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| CN202021514725.XU CN212435430U (en) | 2020-07-28 | 2020-07-28 | High-reliability main and standby alternating current power supply switching control system |
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| CN202021514725.XU CN212435430U (en) | 2020-07-28 | 2020-07-28 | High-reliability main and standby alternating current power supply switching control system |
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| CN212435430U true CN212435430U (en) | 2021-01-29 |
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| CN202021514725.XU Active CN212435430U (en) | 2020-07-28 | 2020-07-28 | High-reliability main and standby alternating current power supply switching control system |
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