Multi-power automatic switching control system and control method

Abstract

The present invention provides a multi-power automatic switching control system and a control method, wherein the multi-power automatic switching control system includes a plurality of multi-power automatic switching control devices and an emergency power automatic switching control device; each multi-power automatic switching control device includes a first processor; a first acquisition unit; a first switch output unit; the emergency power automatic switching control device includes a second processor; a second acquisition unit; a second switch output unit; the first processor is also used to send a start-up signal to the emergency power generator and a power failure signal to the second processor according to the data collected by the first acquisition unit. The control system of the present invention realizes real-time monitoring of current and voltage of multi-power circuits by directly acquiring analog signals of voltage and current without conversion, and then realizes safe and reliable multi-power switching and multi-point emergency power input through the switch quantity in the control system based on a programmable processor.

Description

Technical Field

[0001] The present invention relates to the technical field of power electronics, and in particular to a multi-power automatic switching control system and a control method. Background Art

[0002] In order to improve the reliability of power supply, enterprises need to set up multiple generators such as diesel generators as emergency power supply in addition to two mains. The enterprise has an emergency diesel power station and multiple regional 10kV distribution stations. The primary loads in the factory area are distributed in multiple regional 10kV stations for power supply. The emergency power supply needs to be supplied to multiple regional 10kV distribution stations. If any regional 10kV distribution station loses power, the emergency power supply must be put into use in time.

[0003] The existing multi-power input system including emergency power supply (diesel generator) mainly adopts the following schemes:

[0004] The existing distributed control system (DCS) or a single programmable logic controller (PLC) in the enterprise is used to collect the main power supply signals of each distribution station. The DCS or PLC performs logic programming to determine whether the main power supply is lost, and then controls the start and stop of the diesel generator and the opening and closing of each circuit breaker, thereby realizing the switching of the emergency power supply.

[0005] However, the above prior art has the following shortcomings:

[0006] Ordinary power switching devices cannot solve the problem of multiple power input or multiple point input;

[0007] DCS or PLC are both process controllers and cannot directly collect signals from electrical voltage transformers PT and current transformers CT. They need to be converted into 4-20MA analog signals.

[0008] DCS or PLC lacks electromagnetic interference resistance, stability, reliability and response time;

[0009] The cost of DCS or PLC is high. Basically, a centralized system is used to collect the power supply signals of 10kV stations in various regions. The signal distance is long, and the signal is easily attenuated and interfered.

[0010] DCS or PLC cannot interact directly with the high-voltage comprehensive protection device, some electrical signals cannot be directly shared, and interlocking is inconvenient.

[0011] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0012] In view of the problems in the prior art, the purpose of the present invention is to provide a multi-power automatic switching control system and a control method. The multi-power automatic switching control system is suitable for application in a SCADA system and realizes programmable switching and input of multiple power supplies. At the same time, each multi-power automatic switching control device and emergency power automatic input control device works independently, the modules have strong anti-interference ability, and the collected signals are accurate and reliable, thereby solving the safety and reliability problems of multi-power switching and multi-point input of emergency power supplies required for the project.

[0013] The embodiment of the present invention provides a multi-power automatic switching control system, including a plurality of multi-power automatic switching control devices and an emergency power automatic switching control device;

[0014] Each of the multiple power supply automatic switching control devices comprises:

[0015] a first processor;

[0016] A first acquisition unit, comprising a plurality of voltage transformers and a plurality of current transformers, is electrically connected to the first processor and is used to acquire at least two incoming line voltages and two incoming line currents, two bus voltages, and two emergency power supply incoming line voltages;

[0017] A first switch output unit, electrically connected to the first processor, includes a plurality of first outputs, each of which is used to control the opening and closing states of each incoming line circuit breaker, bus tie circuit breaker or each emergency power incoming line circuit breaker according to a control instruction sent by the first processor;

[0018] The emergency power supply automatic input control device comprises:

[0019] A second processor;

[0020] A second acquisition unit, including a plurality of voltage transformers, is electrically connected to the second processor and is used to acquire at least the emergency power supply line voltage and the emergency section bus voltage;

[0021] A second switch output unit is electrically connected to the second processor and includes a plurality of second outputs, each of which is used to control the opening and closing state of a circuit breaker between the emergency power supply and the emergency section bus or the opening and closing state of two emergency power supply output circuit breakers according to an instruction sent by the second processor;

[0022] The first processor is also used to send a start-up signal of the emergency power supply generator to the emergency power supply generator and send a power failure signal to the second processor according to the data collected by the first collection unit.

[0023] According to some examples of the present invention, each of the multi-power automatic switching control devices further includes a first switch input unit, which is electrically connected to the first processor respectively, and includes multiple first inputs, and the multiple first inputs are used to receive at least the opening and closing status of the incoming circuit breaker or the bus tie circuit breaker of the main power supply;

[0024] The emergency power supply automatic input control device also includes a second switch input unit, which is electrically connected to the second processor and includes multiple second inputs, and the multiple second inputs are used to receive the opening and closing states of at least two emergency power supply output circuit breakers.

[0025] According to some examples of the present invention, the first processor further includes a first programming module for setting a function of defining multiple first output ports and / or multiple first input ports; or

[0026] The second processor further comprises a second programming module for setting a function of defining a plurality of second output ports and / or a plurality of second input ports.

[0027] According to some examples of the present invention, each of the multi-power automatic switching control devices also includes an interaction unit, which is electrically connected to the first processor and is used to set parameter information of the control instruction sent by the first processor, wherein the parameter information includes a control action value and / or a control action time.

[0028] According to some examples of the present invention, each of the multi-power automatic switching control devices further includes a first communication unit electrically connected to the first processor;

[0029] The first communication unit includes two Ethernet interfaces and one RS485 interface. The two Ethernet interfaces are used to communicate with an external comprehensive security device or a SCADA system respectively, and the RS485 interface is used to connect with an external program updating device and a debugging device.

[0030] According to some examples of the present invention, the first processor and / or the second processor adopts a 64-bit DSP dual-core large-capacity non-volatile storage chip.

[0031] The embodiment of the present invention further provides a multi-power automatic switching control method, which uses the multi-power automatic switching control system and includes the following steps:

[0032] Each of the first processors acquires a first incoming line voltage, a first incoming line current, a second incoming line voltage, and a second incoming line current through the first acquisition unit;

[0033] Each of the first processors determines whether the first incoming line voltage, the first incoming line current, the second incoming line voltage, and the second incoming line current are 0;

[0034] If the first incoming line voltage and the first incoming line current are both 0, and the second incoming line voltage and the second incoming line current are not 0, the first switching output unit controls the first incoming line circuit breaker and the bus tie circuit breaker to be in the open state and the closed state respectively.

[0035] According to some examples of the present invention, the multi-power automatic switching control method further includes the following steps:

[0036] Each of the first processors determines whether the first incoming line voltage, the first incoming line current, the second incoming line voltage, and the second incoming line current are all 0;

[0037] If the first incoming line voltage, the first incoming line current, the second incoming line voltage, and the second incoming line current are all 0, the first switching output unit controls the first incoming line circuit breaker, the second incoming line circuit breaker, and the bus tie circuit breaker to be in an open state; and

[0038] The first processor sends a start-up emergency power generator signal to the emergency power generator and sends a power failure signal to the second processor;

[0039] The second acquisition unit acquires the voltage of the emergency power supply line. When the second processor determines that the voltage of the emergency power supply line is acquired, the second switch output unit controls the circuit breaker between the emergency power supply and the emergency section bus to be in a closed state;

[0040] The second acquisition unit acquires the emergency section bus voltage. When the second processor determines that the emergency section bus voltage is acquired, the second switch output unit controls the emergency power supply output circuit breaker corresponding to the multi-power automatic switching control device that sends a power failure signal to be in a closed state.

[0041] According to some examples of the present invention, the multi-power automatic switching control method further includes the following steps:

[0042] The first acquisition unit obtains at least one emergency power supply incoming line voltage;

[0043] Read the opening and closing status of each incoming line circuit breaker and bus tie circuit breaker;

[0044] When the first processor of a multi-power automatic switching control device determines that at least one emergency power supply incoming line voltage has been collected, and each incoming line circuit breaker and the bus tie circuit breaker are in the open state, the first switch output unit controls the emergency power supply incoming line circuit breaker to be in the closed state.

[0045] The multi-power automatic switching control system of the present invention realizes real-time monitoring of current and voltage of multi-power circuits by directly collecting analog signals of voltage transformers and current transformers that do not need to be converted, and then controls the switch quantity in the system based on a programmable processor, which is suitable for application in a SCADA system to realize programmable switching and input of multiple power supplies; at the same time, each multi-power automatic switching control device and emergency power automatic input control device works independently, has strong anti-interference ability between modules, and the collected signals are accurate and reliable, thereby solving the safety and reliability problems of multi-power switching and multi-point input of emergency power required for the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes and advantages of the present invention will become more obvious. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0047] Figure 1 A schematic diagram of a multi-power automatic switching control device according to an embodiment of the present invention;

[0048] Figure 2 This is a schematic diagram of the structure of a regional power distribution station according to an embodiment of the present invention;

[0049] Figure 3 This is a structural schematic diagram of an emergency power station according to an embodiment of the present invention;

[0050] Figure 4 The present invention is a control logic diagram of a multi-power automatic switching control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0052] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0053] The embodiment of the present invention provides a multi-power automatic switching control system, which includes a plurality of multi-power automatic switching control devices and an emergency power automatic switching control device.

[0054] Figure 1 This is a schematic diagram of a multi-power automatic switching control device according to an embodiment of the present invention, each of which comprises:

[0055] A first processor M100;

[0056] The first acquisition unit M200 includes a plurality of voltage transformers PT and a plurality of current transformers CT, is electrically connected to the first processor, and is used to acquire at least two incoming line voltages and two incoming line currents, two bus voltages, and two emergency power supply incoming line voltages;

[0057] a first switch output unit, electrically connected to the first processor, comprising a plurality of first outputs, each of which is used to control the opening and closing states of each incoming line circuit breaker, bus tie circuit breaker or each emergency power incoming line circuit breaker according to a control instruction sent by the first processor;

[0058] Similarly, the emergency power supply automatic input control device includes:

[0059] A second processor;

[0060] The second acquisition unit includes multiple voltage transformers PT, which are electrically connected to the second processor and are used to collect at least the emergency power supply line voltage and the emergency section bus voltage; in some embodiments, the second acquisition unit also includes multiple current transformers CT, which are used to collect the emergency power supply line current and the emergency section bus current, etc.

[0061] A second switch output unit is electrically connected to the second processor and includes a plurality of second outputs, each of which is used to control the opening and closing state of a circuit breaker between the emergency power supply and the emergency section bus or the opening and closing state of two emergency power supply output circuit breakers according to an instruction sent by the second processor;

[0062] The first processor is also used to send a start-up signal to the emergency power generator and a power failure signal to the second processor according to the data collected by the first acquisition unit. The function of this configuration is further described in the multi-power automatic switching control method section below.

[0063] Of course, each multi-power automatic switching control device and emergency power automatic input control device has a power module M900 electrically connected to its processor, which is used to provide power to the module. The multi-power automatic switching control system of the present invention is suitable for a situation including multiple regional power distribution stations and an emergency power station. Each regional power distribution station is equipped with a multi-power automatic switching control device, and the emergency power station is equipped with an emergency power automatic input control device.

[0064] Figure 2 and Figure 3 The following are structural diagrams of a regional power distribution station and an emergency power station according to an embodiment of the present invention; Figure 2 and Figure 3 The embodiment further illustrates the structure of the multi-power automatic switching control system of the present invention. Figure 2 The regional distribution station of the embodiment has two main power supply incoming lines (110, 210), two busbars (210, 220) and two emergency power supply incoming lines (310, 320). Accordingly, the first acquisition unit M200 of the multi-power automatic switching control device configured in the regional distribution station includes at least six voltage transformers PT and two current transformers CT. The six voltage transformers PT are respectively used to read the voltage analog quantities of the two main power supply incoming lines, the two busbars and the two emergency power supply incoming lines, and the two current transformers CT can be used to read the current analog quantities of the two main power supply incoming lines.

[0065] In some other embodiments, the first acquisition unit M200 includes more voltage transformers PT and more current transformers CT. For example, since the main power supply line is three-phase, one incoming line PT requires three PTs. Similarly, the bus is also three-phase and requires three CTs. In this case, the first acquisition unit M200 includes at least ten voltage transformers PT and six current transformers CT. The voltage and current signals detected by the first acquisition unit of each regional distribution station are all in-station signals, with short transmission distance, high accuracy and fast response.

[0066] Likewise, Figure 2 The first switch output unit M300 configured in the regional power distribution station of the embodiment at least includes multiple first outputs capable of controlling two incoming line circuit breakers of the main power supply, a bus tie circuit breaker between two busbars, and two incoming line circuit breakers of the emergency power supply.

[0067] Figure 3The emergency power station of the embodiment has an emergency power supply motor incoming line, an emergency section bus and an emergency power supply outgoing line. Accordingly, the second acquisition unit of the emergency power supply automatic start-up control device configured in the emergency power station includes at least two voltage transformers PT for collecting the emergency power supply line voltage and the emergency section bus current 400, and the second switch output unit includes at least four second outputs, which are respectively used to control the opening and closing states of the circuit breaker on the emergency power supply motor incoming line or the opening and closing states of the circuit breakers of the two emergency power supply outgoing lines (301, 302) between the emergency power supply and the emergency section bus. It should be noted that the two emergency power supply outgoing lines (301, 302) of the emergency power station are connected to the two emergency power supply incoming lines (310, 320) of the regional distribution station. The power generator of the emergency power station can be a diesel generator, and the emergency power station can include multiple generators ( Figure 3 In the embodiment, there are two generators. At this time, the first switch output unit M300 configured in the regional distribution station can start multiple generators simultaneously through the first output.

[0068] The voltage of the regional distribution station may be 4KV, 6KV, 10KV or 20KV, without limitation. Accordingly, the voltage of the emergency power station matches the voltage of the regional distribution station.

[0069] The multi-power automatic switching control system of the present invention realizes real-time monitoring of current and voltage of multiple power supply circuits by directly collecting analog signals of voltage transformers and current transformers that do not require conversion, and then realizes programmable switching of multiple power supplies through the switch quantity in the control system based on a programmable processor.

[0070] In the process of using the multi-power automatic switching control system of the present invention, it is also necessary to obtain the status of each circuit breaker to determine the on-off status of each line. In some embodiments, each of the multi-power automatic switching control devices may also include a first switch input unit M400, which is electrically connected to the first processor respectively, including multiple first inputs, and the multiple first inputs are used to receive the opening and closing status of the incoming circuit breaker of the main power supply, the opening and closing status of the busbar circuit breaker and / or the opening and closing status of the two emergency power supply output circuit breakers, etc.;

[0071] Similarly, the emergency power supply automatic start-up control device also includes a second switch input unit, which is electrically connected to the second processor and includes multiple second inputs, which are used to receive the opening and closing status of the circuit breaker between the emergency power supply and the emergency section bus or the opening and closing status of the emergency power supply output circuit breaker, etc.

[0072] In some embodiments, the first processor and / or the second processor may both adopt a 64-bit DSP dual-core large-capacity non-volatile memory chip. In this case, the first processor may include a first programming module M110 for setting a function of defining multiple first output ports and / or multiple first input ports; or

[0073] The second processor may include a second programming module for setting a function of defining a plurality of second output ports and / or a plurality of second input ports.

[0074] The first programming modules of each regional distribution station work independently without interfering with each other, and are respectively interlocked with the second programming module of the emergency power station and the emergency generator control module (included in the emergency generator control cabinet), ensuring reliability and flexibility.

[0075] Each of the multi-power automatic switching control devices may further include an interaction unit M500, which is electrically connected to the first processor and is used to set parameter information of the control instruction sent by the first processor, wherein the parameter information includes a control action value and / or a control action time.

[0076] Each of the multi-power automatic switching control devices also includes a first communication unit M500, and the first communication unit M600 is electrically connected to the first processor, including two Ethernet interfaces and an RS485 interface, the two Ethernet interfaces are respectively used to communicate with an external comprehensive security device or a SCADA system, and the RS485 interface is used to connect to an external program update device and a debugging device. Similarly, the emergency power automatic switching control device may also include a second communication unit, and the second communication unit includes an interface that can communicate with an external comprehensive security device or a SCADA system, so that the communication between the multi-power automatic switching control device and the emergency power automatic switching control device is realized through the SCADA system, so that the multi-power automatic switching control system is suitable for application in the SCADA system.

[0077] The embodiment of the present invention further provides a multi-power automatic switching control method, using the multi-power automatic switching control system, Figure 4 This is a control logic diagram of a multi-power automatic switching control method according to an embodiment of the present invention. The multi-power automatic switching control method comprises the following steps:

[0078] At each regional power distribution station, each of the first processors obtains a first incoming line voltage, a first incoming line current, a second incoming line voltage, and a second incoming line current through the first acquisition unit;

[0079] Each of the first processors determines whether the first incoming line voltage, the first incoming line current, the second incoming line voltage, and the second incoming line current are 0;

[0080] If the first incoming line voltage and the first incoming line current of one of the multi-power automatic switching control devices are both 0, and the second incoming line voltage and the second incoming line current are not 0, then the first switch output unit of the module controls the first incoming line circuit breaker and the main circuit breaker to be in the open state and the closed state respectively.

[0081] It should be understood that the above method takes two incoming lines of the main power supply at each regional distribution station as an example, and the "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0082] When the first processor receives and determines whether the voltage and current of the two incoming lines are 0, when it is detected that only one incoming line PT has no voltage and the CT has no current, usually, when the first processor also determines that there is no short-circuit fault in the system, the first processor starts the incoming line and bus tie standby automatic switching program, that is, the first processor sends a control instruction to the first switch output unit to trip the one incoming line circuit breaker that has lost power and delay the closing of the bus tie circuit breaker. The first switch output unit makes the one incoming line circuit breaker that has lost power and the bus tie circuit breaker in the open state and closed state respectively according to the above control instruction. The delay can be set according to the actual use scenario, such as 1 second or 2 seconds, and its value can be set by the first programming module described above.

[0083] The multi-power automatic switching control method of the present invention also includes the following steps:

[0084] Each of the first processors determines whether the received first incoming line voltage, first incoming line current, second incoming line voltage, and second incoming line current are all 0;

[0085] If the first incoming line voltage, first incoming line current, second incoming line voltage, and second incoming line current of one of the multi-power automatic switching control devices are all 0, it is determined whether the PT and CT of the two incoming lines of the module are both missing. If so, it is determined that the two main power supplies of the module are out of power. Usually, when the first processor of the module also determines that there is no short-circuit fault in the system, the first processor sends a control instruction to the first switch output unit to control the first incoming line circuit breaker, the second incoming line circuit breaker, and the bus tie circuit breaker to be in the open state, and controls the first incoming line circuit breaker, the second incoming line circuit breaker, and the bus tie circuit breaker to be in the open state through the first switch output unit. Figure 4 It can be seen that the above-mentioned control of the opening and closing states of the first incoming line circuit breaker, the second incoming line circuit breaker or the bus tie circuit breaker may have a certain delay, and the control parameters of the corresponding control instructions may be set by the first processor.

[0086] At the same time, the first processor sends a signal to start the emergency power supply generator and a power-off signal to the second processor; the power-off signal is a signal that the regional distribution station corresponding to the first processor is in a power-off state; specifically, the first processor sends a signal to start the emergency power supply generator to the emergency power supply generator, which can be the first processor sending a signal to start the emergency power supply generator to the emergency power supply generator control cabinet, and the emergency power supply generator control cabinet starts the emergency power supply generator according to the signal. The above are steps executed at the regional distribution station end.

[0087] The second acquisition unit acquires the voltage of the emergency power supply line. When the second processor determines that the voltage of the emergency power supply line is acquired, the second switch output unit controls the circuit breaker between the emergency power supply and the emergency section bus to be in a closed state; the above step is to electrically connect the emergency power supply motor line to the emergency section bus after detecting that the emergency power supply has a PT voltage;

[0088] The second acquisition unit acquires the emergency section bus voltage. When the second processor determines that the emergency section bus voltage is acquired, the second switch output unit controls the emergency power output circuit breaker corresponding to the multi-power automatic switching control device that sends the power failure signal to be in a closed state. At this time, the emergency power outlet cabinet completes power distribution.

[0089] When the emergency power supply outlet cabinet completes power distribution, the first processor at the regional distribution station end obtains at least one emergency power supply incoming line voltage through the first acquisition unit, that is, at least one emergency power supply input voltage is detected;

[0090] Read the opening and closing status of each incoming line circuit breaker and the bus tie circuit breaker; this step can be obtained through the first switch input unit M400. When the first processor of a multi-power automatic switching control device determines that at least one emergency power supply incoming line voltage is collected, and each incoming line circuit breaker and the bus tie circuit breaker are in the open state, that is, to ensure that the regional distribution station is in a power-off state, the first switch output unit controls the emergency power supply incoming line circuit breaker to be in the closed state, so as to realize the emergency power supply to the regional distribution station with power off, and the emergency power supply input process ends.

[0091] In summary, the present invention provides a multi-power automatic switching control system and a control method, a multi-power automatic switching control system includes multiple multi-power automatic switching control devices and an emergency power automatic input control device; each of the multi-power automatic switching control devices includes a first processor; a first acquisition unit including multiple voltage transformers and multiple current transformers; a first switch output unit; the emergency power automatic input control device includes a second processor; a second acquisition unit including multiple voltage transformers; a second switch output unit; the first processor is also used to send a power failure signal to the second processor according to the data collected by the first acquisition unit. The multi-power automatic switching control system of the present invention directly collects analog signals of voltage transformers and current transformers that do not need to be converted, realizes real-time monitoring of current and voltage of multi-power circuits, and then controls the switch quantity in the control system based on a programmable processor, which is suitable for application in a SCADA system to realize programmable switching and input of multiple power supplies; at the same time, each multi-power automatic switching control device and the emergency power automatic input control device work independently, the anti-interference ability between modules is strong, and the collected signals are accurate and reliable, thereby solving the safety and reliability problems of multi-power switching and multi-point input of emergency power required for the project.

[0092] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the device claim can also be implemented by one unit or device through software or hardware. The words first, second, etc. are used to indicate the name, and do not indicate any specific order.

Claims

1. A multi-power automatic switching control system, characterized in that: It includes multiple automatic switching control devices for multiple power supplies and an automatic emergency power supply control device; Each of the multiple power supply automatic switching control devices comprises: a first processor; The first acquisition unit includes at least six voltage transformers and two current transformers, the six voltage transformers are used to read the voltage analog quantities of the two incoming lines of the main power supply, the two busbars and the two incoming lines of the emergency power supply, and the two current transformers are used to read the current analog quantities of the two incoming lines of the main power supply; a first switch output unit, electrically connected to the first processor, comprising a plurality of first outputs, each of which is used to control the opening and closing states of each incoming line circuit breaker, bus tie circuit breaker or each emergency power incoming line circuit breaker according to a control instruction sent by the first processor; The emergency power supply automatic input control device comprises: A second processor; A second acquisition unit, including a plurality of voltage transformers, is electrically connected to the second processor and is used to acquire at least the emergency power supply line voltage and the emergency section bus voltage; A second switch output unit, electrically connected to the second processor, includes at least four second outputs, each second output is used to control the opening and closing state of the circuit breaker between the emergency power supply and the emergency section bus or the opening and closing state of the two emergency power supply output circuit breakers according to the instruction sent by the second processor; Both the voltage transformer and the current transformer provide analog signals; The first processor is also used to send a start-up emergency power supply generator signal to the emergency power supply generator and a power failure signal to the second processor according to the data collected by the first collection unit; The first processor further comprises a first programming module for setting a function of defining a plurality of first output ports and / or a plurality of first input ports; or The second processor further comprises a second programming module for setting a function of defining a plurality of second output ports and / or a plurality of second input ports.

2. The multi-power automatic switching control system according to claim 1 is characterized in that: Each of the multi-power automatic switching control devices also includes a first switch input unit, which is electrically connected to the first processor respectively, and includes multiple first inputs, and the multiple first inputs are used to receive at least the opening and closing states of the incoming circuit breaker or the bus tie circuit breaker of the main power supply; The emergency power supply automatic input control device also includes a second switch input unit, which is electrically connected to the second processor and includes multiple second inputs, and the multiple second inputs are used to receive the opening and closing states of at least two emergency power supply output circuit breakers.

3. The multi-power automatic switching control system according to claim 1 is characterized in that: Each of the multi-power automatic switching control devices also includes an interaction unit, which is electrically connected to the first processor and is used to set parameter information of the control instruction sent by the first processor, wherein the parameter information includes a control action value and / or a control action time.

4. The multi-power automatic switching control system according to claim 1 is characterized in that: Each of the multi-power automatic switching control devices further includes a first communication unit electrically connected to the first processor; The first communication unit includes two Ethernet interfaces and one RS485 interface. The two Ethernet interfaces are used to communicate with an external comprehensive security device or a SCADA system respectively, and the RS485 interface is used to connect with an external program updating device and a debugging device.

5. The multi-power automatic switching control system according to claim 1 is characterized in that: The first processor and / or the second processor adopts a 64-bit DSP dual-core large-capacity non-volatile storage chip.

6. A method for controlling automatic switching of multiple power supplies, using the automatic switching control system of multiple power supplies as claimed in claim 2, characterized in that: The following steps are involved: Each of the first processors acquires a first incoming line voltage, a first incoming line current, a second incoming line voltage, and a second incoming line current through the first acquisition unit; Each of the first processors determines whether the first incoming line voltage, the first incoming line current, the second incoming line voltage, and the second incoming line current are 0; If the first incoming line voltage and the first incoming line current are both 0, and the second incoming line voltage and the second incoming line current are not 0, the first switching output unit controls the first incoming line circuit breaker and the bus tie circuit breaker to be in the open state and the closed state respectively.

7. The multi-power automatic switching control method according to claim 6, characterized in that: The following steps are also included: Each of the first processors determines whether the first incoming line voltage, the first incoming line current, the second incoming line voltage, and the second incoming line current are all 0; If the first incoming line voltage, the first incoming line current, the second incoming line voltage, and the second incoming line current are all 0, the first switching output unit controls the first incoming line circuit breaker, the second incoming line circuit breaker, and the bus tie circuit breaker to be in an open state; and The first processor is also used to send a start-up signal of the emergency power supply generator to the emergency power supply generator and a power failure signal to the second processor according to the data collected by the first collection unit; The first processor sends a start-up emergency power generator signal to the emergency power generator and sends a power failure signal to the second processor; The second acquisition unit acquires the voltage of the emergency power supply line. When the second processor determines that the voltage of the emergency power supply line is acquired, the second switch output unit controls the circuit breaker between the emergency power supply and the emergency section bus to be in a closed state; The second acquisition unit acquires the emergency section bus voltage. When the second processor determines that the emergency section bus voltage is acquired, the second switch output unit controls the emergency power supply output circuit breaker corresponding to the multi-power automatic switching control device that sends a power failure signal to be in a closed state.

8. The multi-power automatic switching control method according to claim 7, characterized in that: The following steps are also included: The first acquisition unit obtains at least one emergency power supply incoming line voltage; Read the opening and closing status of each incoming line circuit breaker and bus tie circuit breaker; When the first processor of a multi-power automatic switching control device determines that at least one emergency power supply incoming line voltage has been collected, and each incoming line circuit breaker and the bus tie circuit breaker are in the open state, the first switch output unit controls the emergency power supply incoming line circuit breaker to be in the closed state.

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