Intelligent non-perception power supply operation system and method

Abstract

The application provides an intelligent non-perception power supply operation device, system and method, which comprises a cabinet body and a first switch QF1, a second switch QF2 and a third switch QF3 arranged in the cabinet body, the inner connection ends of the first switch QF1, the second switch QF2 and the third switch QF3 are commonly short-circuited, the outer connection end of the first switch QF1 is connected with a commercial power output end, the outer connection end of the second switch QF2 is connected with a temporary power supply source, and the outer connection end of the third switch QF3 is connected with an input end of a first power consumption load branch; and the short-circuiting points of the first switch QF1, the second switch QF2 and the third switch QF3 are connected with an input end of a second power consumption load branch. When planned power cut is realized, the application can reduce short-time fluctuation of a power supply system and reduce loss caused by power cut.

Description

Technical Field

[0001] This invention relates to the field of bypass operation technology for power supply and distribution systems, and more specifically, to an intelligent, non-intrusive power supply operation device, system, and method. Background Technology

[0002] JP cabinets, or low-voltage switchgear integrated distribution cabinets, have a compact internal structure. How to achieve seamless emergency power supply to users during planned power outages of JP cabinets is a topic worthy of research. Existing methods are all short-term outage methods, which can cause short-term fluctuations and some losses to users. Therefore, achieving truly seamless power supply for users during planned power outages of JP cabinets is of great significance. Summary of the Invention

[0003] This invention addresses the technical problems existing in the prior art by providing an intelligent, seamless power supply operation device, system, and method. When implementing planned power outages, it can reduce short-term fluctuations in the power supply system and reduce losses caused by power outages.

[0004] According to a first aspect of the present invention, an intelligent, seamless power supply operation device is provided, comprising a cabinet and a first switch QF1, a second switch QF2, and a third switch QF3 disposed within the cabinet. The internal terminals of the first switch QF1, the second switch QF2, and the third switch QF3 are short-circuited together. The external terminal of the first switch QF1 is connected to the mains power output terminal. The external terminal of the second switch QF2 is connected to a temporary power supply. The external terminal of the third switch QF3 is connected to the input terminal of a first electrical load branch. The short-circuit point of the first switch QF1, the second switch QF2, and the third switch QF3 is connected to the input terminal of a second electrical load branch.

[0005] Preferably, the cabinet is also equipped with a phase sequence detector. The multiple detection terminals of the phase sequence detector are connected one-to-one to the input terminal of the second electrical load branch, the external terminal of the first switch QF1, the external terminal of the second switch QF2, and the external terminal of the third switch QF3, for detecting the phase sequence of the second electrical load branch, the phase sequence of the mains power, the phase sequence of the temporary power supply, and the phase sequence of the first electrical load branch.

[0006] Preferably, it also includes multiple multi-functional power meters, which are connected one-to-one to the input terminal of the second electrical load branch, the external terminal of the first switch QF1, the external terminal of the second switch QF2, and the external terminal of the third switch QF3, for detecting any one or more of the frequency, voltage, and current at each connection point.

[0007] Preferably, it also includes a controller, wherein multiple information sampling terminals of the controller are connected one-to-one to the output terminals of the phase sequence detector and the output terminals of the multiple multifunctional power meters, for comparing the detected values ​​with preset thresholds to determine the detection results.

[0008] Preferably, the cabinet is equipped with multiple set-top and closing buttons, and multiple input terminals of the controller are connected one-to-one with the multiple set-top and closing buttons to receive the opening and closing control commands of the first switch QF1, the second switch QF2, and the third switch QF3; multiple output terminals of the controller are connected one-to-one with the opening and closing control terminals of the first switch QF1, the second switch QF2, and the third switch QF3 through multiple relays to control the opening and closing states of the first switch QF1, the second switch QF2, and the third switch QF3 respectively.

[0009] Preferably, it also includes a touch display unit, which is communicatively connected to the controller.

[0010] Preferably, it also includes a wireless communication unit, which is communicatively connected to the controller.

[0011] Preferably, the device further includes a synchronization detection device and a synchronization changeover switch. The synchronization detection device includes at least two sets of detection channels, and the two sets of detection channels of the synchronization detection device are connected one-to-one with the two sets of switch contacts of the synchronization changeover switch to realize the switching of the two sets of detection channels. One set of detection channels of the synchronization detection device is set at both ends of the first switch QF1 to detect the synchronization between the mains power output terminal and the first power load branch / second power load branch. The other set of detection channels of the synchronization detection device is set at both ends of the second switch QF2 to detect the synchronization between the temporary power supply output terminal and the first power load branch / second power load branch.

[0012] According to a second aspect of the present invention, an intelligent seamless power supply operation system is provided, comprising the aforementioned intelligent seamless power supply operation device, and further comprising: a fourth switch QF4 and a fifth switch QF5, one end of the fourth switch QF4 and the fifth switch QF5 being connected to the mains power output terminal, the other end of the fourth switch QF4 being connected to the input terminal of the second power load branch, and the other end of the fifth switch QF5 being connected to the input terminal of the first power load branch.

[0013] According to a third aspect of the present invention, based on the above-described system, an intelligent, seamless power supply operation method is also provided, comprising:

[0014] S1, after verifying that the phase sequence of the third switch QF3 is correct, close the third switch QF3; after verifying that the phase sequence of the first switch QF1 is correct, close the first switch QF1 to establish a bypass power supply.

[0015] S2, trips the fourth switch QF4 and the fifth switch QF5;

[0016] S3, after determining that the quasi-synchronization conditions at both ends of the second switch QF2 are qualified, close the second switch QF2 to connect the temporary power supply;

[0017] S4, increase the output power of the temporary power supply until the output power of the temporary power supply is deemed qualified, and disconnect the first switch QF1 to disconnect the bypass power supply.

[0018] S5, after determining that the quasi-synchronization conditions at both ends of the first switch QF1 are qualified, close the first switch QF1 to connect the bypass power supply;

[0019] S6, reduce the output power of the temporary power supply until the power output of the mains power supply is deemed qualified, and open the second switch QF2 to disconnect the temporary power supply.

[0020] S7, close the fourth switch QF4 and the fifth switch QF5;

[0021] S8, trips the first switch QF1 and the third switch QF3.

[0022] This invention provides an intelligent, seamless power supply operation device, system, and method. When providing emergency power to users using temporary power supplies (such as generator trucks), it enables seamless connection and disconnection of the temporary power supply, reducing losses on the user side. Especially when dealing with JP cabinets, the device has two outputs, and when the two loads of the JP cabinet are connected, there is a bypass phase detection to avoid short-circuit faults caused by wiring errors. This device integrates automatic phase detection, multi-point quasi-synchronous control, and equipment line status monitoring, further improving the accuracy and safety of operation; moreover, the device is small in size and easy to carry. The development of this equipment is beneficial to improving the efficiency of emergency power supply operations, making the operation more intelligent and convenient. Attached Figure Description

[0023] Figure 1 The present invention provides an overall wiring diagram of an intelligent, non-intrusive power supply operation device and system;

[0024] Figure 2 This is a schematic diagram of the detection points of the device of the present invention;

[0025] Figure 3 This is the electrical schematic diagram of the device of the present invention;

[0026] Figure 4 This is a wiring diagram of the controller of the present invention;

[0027] Figure 5 This is a schematic diagram illustrating the functions of each terminal of the controller of the present invention;

[0028] Figure 6This is a schematic diagram of the external structure of the device of the present invention;

[0029] Figure 7 This is a schematic diagram of the operation panel layout of the device of the present invention;

[0030] Figure 8 A flowchart of an intelligent, seamless power supply operation method provided by the present invention.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Cabinet; 2. Controller; 301. Multifunctional power meter on the mains side; 302. Multifunctional power meter on the temporary power supply side; 303. Multifunctional power meter for the first electrical load; 304. Multifunctional power meter for the second electrical load; 401. Phase sequence detection hole on the mains side; 402. Phase sequence detection hole on the temporary power supply side; 403. Phase sequence detection hole for the first electrical load; 404. Phase sequence detection hole for the second electrical load; 501. Power indicator light on the mains side; 502. Power indicator light on the temporary power supply side; 503. Power indicator light for the first electrical load; 504. Power indicator light for the second electrical load; 6. Touch display unit; 7. Synchronization switch; 8. Handle; 9. Roller.

[0033] 101. QF1 trip button, 101a. QF1 trip indicator light, 102. QF2 trip button, 102a. QF2 trip indicator light, 103. QF3 trip button, 103a. QF3 trip indicator light, 104. QF1 close button, 104a. QF1 close indicator light, 105. QF2 close button, 105a. QF2 close indicator light, 106. QF3 close button, 106a. QF3 close indicator light;

[0034] QF1, first switch; QF2, second switch; QF3, third switch; QF4, fourth switch; QF5, fifth switch; QS1 / QS2, disconnecting switches. Detailed Implementation

[0035] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0036] Please see Figure 1 and Figure 6 , Figure 1 This embodiment provides an overall wiring diagram for the application of an intelligent, non-intrusive power supply maintenance device in a power supply and distribution system. Figure 6 This is a schematic diagram of the external structure of the device provided in this embodiment.

[0037] like Figure 1 and Figure 6As shown, this device includes a cabinet 1 and a first switch QF1, a second switch QF2, and a third switch QF3 disposed within the cabinet 1. The internal terminals of the first switch QF1, the second switch QF2, and the third switch QF3 are short-circuited together. The external terminal of the first switch QF1 is connected to the mains power output terminal, the external terminal of the second switch QF2 is connected to the temporary power supply, and the external terminal of the third switch QF3 is connected to the input terminal of the first electrical load branch. The short-circuit point of the first switch QF1, the second switch QF2, and the third switch QF3 is connected to the input terminal of the second electrical load branch.

[0038] Understandably, this embodiment addresses the shortcomings pointed out in the background technology by providing an intelligent, seamless power supply backup device that overcomes these shortcomings. In use, the external terminal of the first switch QF1 is first connected to the mains output terminal and closed to form a bypass power supply. After the bypass power supply stabilizes, the second switch QF2 is closed to provide power to both the bypass and the temporary power supply. The output power of the temporary power supply is gradually increased to transfer the load. Subsequently, the first switch QF1 is opened to switch to power supply solely from the temporary power supply. When mains power needs to be restored, the reverse steps are followed. When this device is applied to a power supply system, it can seamlessly connect and disconnect the temporary power supply when providing emergency power to users using a temporary power supply (e.g., a generator G in a generator truck), reducing losses on the user side. To enhance portability, a handle 8 is provided on the top of the cabinet 1, and multiple casters 9 are provided on the bottom of the cabinet 1. This device has a simple structure, small size, is easy to carry, and offers operational flexibility.

[0039] In this embodiment, the cabinet 1 is also equipped with a phase sequence detector. Multiple detection terminals of the phase sequence detector are connected one-to-one to the input terminal of the second electrical load branch, the external terminal of the first switch QF1, the external terminal of the second switch QF2, and the external terminal of the third switch QF3, for detecting the phase sequence of the second electrical load branch, the mains power phase sequence, the temporary power supply phase sequence, and the phase sequence of the first electrical load branch. For example... Figure 2 Schematic diagram of each detection point of the device Figure 3 As shown in the electrical schematic diagram of the device, it has four phase sequence detection points to detect the phase sequence of the mains power, the phase sequence of the temporary power supply, and the phase sequence of the two load branches, respectively. Figure 7As shown in the schematic diagram of the device's operation panel layout, the lower part of the panel is equipped with a mains-side phase sequence detection hole 401, a temporary power supply-side phase sequence detection hole 402, a first electrical load phase sequence detection hole 403, and a second electrical load phase sequence detection hole 404, for multi-point phase sequence detection. Corresponding to the location of each phase sequence detection point, there are also mains-side energized indicator lights 501, temporary power supply-side energized indicator lights 502, first electrical load energized indicator lights 503, and second electrical load energized indicator lights 504, to reflect the energization status of each phase sequence detection point in real time.

[0040] Understandably, before closing each switch, it is necessary to check the phase sequence at both ends of the switch and confirm that the phase sequence is correct before closing the switch, in order to improve the safety of power supply.

[0041] In this embodiment, as Figure 6 As shown in the schematic diagram of the device panel, the device also includes multiple multi-functional power meters, such as a mains-side multi-functional power meter 301, a temporary power supply-side multi-functional power meter 302, a first electrical load multi-functional power meter 303, and a second electrical load multi-functional power meter 304. The multiple multi-functional power meters are connected one-to-one to the input terminal of the second electrical load branch, the external terminal of the first switch QF1, the external terminal of the second switch QF2, and the external terminal of the third switch QF3, for detecting any one or more of the frequency, voltage, and current of the mains side, the temporary power supply side, the first electrical load, and the second electrical load.

[0042] In this embodiment, as Figures 3-5 As shown, the device also includes a controller 2, whose multiple information sampling terminals are connected one-to-one to the output terminals of the phase sequence detector and the output terminals of the multiple multifunctional power meters, for comparing the detected values ​​with preset thresholds to determine the detection results.

[0043] In this embodiment, as Figure 6As shown, the cabinet 1 is equipped with multiple opening and closing buttons, such as QF1 opening button 101, QF2 opening button 102, QF3 opening button 103, QF1 closing button 104, QF2 closing button 105, and QF3 closing button 106. Each button is also equipped with a corresponding QF1 opening indicator light 101a, QF2 opening indicator light 102a, QF3 opening indicator light 103a, QF1 closing indicator light 104a, QF2 closing indicator light 105a, and QF3 closing indicator light 106a to indicate the working status of each opening and closing button in real time. The controller 2 has multiple input terminals connected one-to-one with multiple opening and closing buttons, used to receive opening and closing control commands from the first switch QF1, the second switch QF2, and the third switch QF3. The controller 2 also has multiple output terminals connected one-to-one with the opening and closing control terminals of the first switch QF1, the second switch QF2, and the third switch QF3 via multiple relays, used to control the opening and closing states of the first switch QF1, the second switch QF2, and the third switch QF3 respectively. Indicator lights corresponding to each opening and closing button are connected in series in their respective relay control circuits to indicate in real time the controller 2's control operations for opening and closing each switch.

[0044] In this embodiment, as Figure 6 As shown, the control panel of the cabinet 1 is also equipped with a touch display unit 6 that is integrated with the controller 2. The touch display unit 6 is communicatively connected to the controller 2 and is used to provide a human-computer interaction page.

[0045] In this embodiment, as Figure 4 As shown in the wiring diagram of controller 2, this device also includes a wireless communication unit, which is communicatively connected to controller 2 to enable wireless communication between the device and the host computer. Similarly, as... Figure 5 The schematic diagram of each terminal of the controller 2 is shown. This device is also equipped with a communication serial port and a communication network port to realize the communication connection between the controller 2 and other devices.

[0046] like Figure 6 As shown, this device also includes a synchronization detection device and a synchronization changeover switch 7. The synchronization detection device includes at least two sets of detection channels, and the two sets of detection channels of the synchronization detection device are connected one-to-one with the two sets of switch contacts of the synchronization changeover switch 7 to realize the switching of the two sets of detection channels. One set of detection channels of the synchronization detection device is set at both ends of the first switch QF1 to detect the synchronization between the mains power output terminal and the first power load branch / second power load branch. The other set of detection channels of the synchronization detection device is set at both ends of the second switch QF2 to detect the synchronization between the temporary power supply output terminal and the first power load branch / second power load branch.

[0047] Based on the above-described apparatus, this embodiment provides as follows: Figure 1 The illustrated intelligent, seamless power supply backup system includes the aforementioned intelligent, seamless power supply backup device, and further includes: a fourth switch QF4 and a fifth switch QF5. One end of both switches QF4 and QF5 is connected to the mains power output terminal. The other end of the fourth switch QF4 is connected to the input terminal of the second power load branch, and the other end of the fifth switch QF5 is connected to the input terminal of the first power load branch. The mains power output terminal can be understood as the secondary output terminal of the 10kV / 0.4kV transformer in the power supply and distribution system. To increase the safety of the power supply and distribution system, isolating switches QS1 and QS2 are respectively installed on the primary and secondary sides of the 10kV / 0.4kV transformer.

[0048] The aforementioned intelligent, seamless power supply system enables seamless connection and disconnection of temporary power sources (such as generator trucks) to provide emergency power to users, reducing losses on the user side. Especially when dealing with JP cabinets, the device features dual outputs, and bypass phase detection is implemented when the two loads of the JP cabinet are connected, preventing short-circuit faults caused by wiring errors.

[0049] It is understood that the intelligent seamless power supply operation system provided by the present invention corresponds to the intelligent seamless power supply operation device provided in the foregoing embodiments. The relevant technical features of the intelligent seamless power supply operation system can be referred to the relevant technical features of the intelligent seamless power supply operation device, and will not be repeated here.

[0050] like Figure 8 The diagram shown is a flowchart of an intelligent, seamless power supply maintenance method provided in this embodiment. The intelligent, seamless power supply maintenance method provided in this embodiment includes the following steps:

[0051] S1, Establish bypass power supply: After verifying that the phase sequence of the third switch QF3 is correct, close the third switch QF3; after verifying that the phase sequence of the first switch QF1 is correct, close the first switch QF1 to establish bypass power supply.

[0052] S2, disconnect mains power supply: trip the fourth switch QF4 and the fifth switch QF5;

[0053] S3, Temporary power supply and bypass power supply in parallel: After determining that the quasi-synchronization conditions at both ends of the second switch QF2 are qualified, close the second switch QF2 to connect the temporary power supply.

[0054] S4, Load Transfer, Bypass Exit: Increase the output power of the temporary power supply until the output power of the temporary power supply is deemed qualified, and open the first switch QF1 to exit the bypass power supply.

[0055] It is understandable that the above steps S1~S5 complete the seamless conversion from mains power supply to temporary power supply, and there is a bypass phase detection when the two loads are connected, which can avoid short circuit faults caused by wiring errors.

[0056] When it is necessary to restore mains power, you can follow the steps S5 to S8 below.

[0057] S5, connect to bypass, the bypass and temporary power supply are powered together: after judging that the quasi-synchronization conditions at both ends of the first switch QF1 are qualified, close the first switch QF1 to connect to the bypass power supply.

[0058] S6, load transfer, disconnect temporary power supply: reduce the output power of the temporary power supply until the power output of the mains power terminal is deemed qualified, and open the second switch QF2 to disconnect the temporary power supply.

[0059] S7, bypass and parallel power supply to mains: close the fourth switch QF4 and the fifth switch QF5;

[0060] S8, Exit Bypass: Open the first switch QF1 and the third switch QF3.

[0061] This invention provides an intelligent, seamless power supply operation device, system, and method. When providing emergency power to users using temporary power supplies (such as generator trucks), it enables seamless connection and disconnection of the temporary power supply, reducing losses on the user side. Especially when dealing with JP cabinets, the device has two outputs, and when the two loads of the JP cabinet are connected, there is a bypass phase detection to avoid short-circuit faults caused by wiring errors. This device integrates automatic phase detection, multi-point quasi-synchronous control, and equipment line status monitoring, further improving the accuracy and safety of operation; moreover, the device is small in size and easy to carry. The development of this equipment is beneficial to improving the efficiency of emergency power supply operations, making the operation more intelligent and convenient.

[0062] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0063] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0064] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An intelligent, seamless power supply operation system, characterized in that, Includes a cabinet (1) and a first switch QF1, a second switch QF2 and a third switch QF3 installed inside the cabinet (1). The inner terminals of the first switch QF1, the second switch QF2 and the third switch QF3 are short-circuited together. The outer terminal of the first switch QF1 is connected to the mains power output terminal. The outer terminal of the second switch QF2 is connected to the temporary power supply. The outer terminal of the third switch QF3 is connected to the input terminal of the first power load branch. The short-circuit point of the first switch QF1, the second switch QF2 and the third switch QF3 is connected to the input terminal of the second power load branch. It also includes a fourth switch QF4 and a fifth switch QF5. One end of the fourth switch QF4 and the fifth switch QF5 are connected to the mains power output terminal. The other end of the fourth switch QF4 is connected to the input terminal of the second power load branch, and the other end of the fifth switch QF5 is connected to the input terminal of the first power load branch. The operating method of the system includes: S1, after verifying that the phase sequence of the third switch QF3 is correct, close the third switch QF3; after verifying that the phase sequence of the first switch QF1 is correct, close the first switch QF1 to establish a bypass power supply. S2, trips the fourth switch QF4 and the fifth switch QF5; S3, after determining that the quasi-synchronization conditions at both ends of the second switch QF2 are qualified, close the second switch QF2 to connect the temporary power supply; S4, increase the output power of the temporary power supply until the output power of the temporary power supply is deemed qualified, and disconnect the first switch QF1 to disconnect the bypass power supply. S5, after determining that the quasi-synchronization conditions at both ends of the first switch QF1 are qualified, close the first switch QF1 to connect the bypass power supply; S6, reduce the output power of the temporary power supply until the power output of the mains power supply is deemed qualified, and open the second switch QF2 to disconnect the temporary power supply. S7, close the fourth switch QF4 and the fifth switch QF5; S8, trips the first switch QF1 and the third switch QF3.

2. The intelligent, seamless power supply operation system according to claim 1, characterized in that, The cabinet (1) is also equipped with a phase sequence detector. The multiple detection terminals of the phase sequence detector are connected one-to-one to the input terminal of the second power load branch, the external terminal of the first switch QF1, the external terminal of the second switch QF2 and the external terminal of the third switch QF3, for detecting the phase sequence of the second power load branch, the phase sequence of the mains power, the phase sequence of the temporary power supply and the phase sequence of the first power load branch.

3. The intelligent, seamless power supply operation system according to claim 2, characterized in that, It also includes multiple multi-functional power meters, which are connected one-to-one to the input terminal of the second power load branch, the external terminal of the first switch QF1, the external terminal of the second switch QF2, and the external terminal of the third switch QF3, for detecting any one or more of the frequency, voltage, and current at each connection point.

4. The intelligent, seamless power supply operation system according to claim 3, characterized in that, It also includes a controller (2), wherein multiple information sampling terminals of the controller (2) are connected one-to-one to the output terminals of the phase sequence detector and the output terminals of multiple multifunctional power meters, for comparing the detection value with a preset threshold and determining the detection result.

5. The intelligent, seamless power supply operation system according to claim 4, characterized in that, The cabinet (1) is equipped with multiple opening and closing buttons. Multiple input terminals of the controller (2) are connected to the multiple opening and closing buttons one by one, and are used to receive the opening and closing control commands of the first switch QF1, the second switch QF2 and the third switch QF3. Multiple output terminals of the controller (2) are connected to the opening and closing control terminals of the first switch QF1, the second switch QF2 and the third switch QF3 one by one through multiple relays, and are used to control the opening and closing states of the first switch QF1, the second switch QF2 and the third switch QF3 respectively.

6. An intelligent, seamless power supply operation system according to claim 4 or 5, characterized in that, It also includes a touch display unit (6), which is communicatively connected to the controller (2).

7. An intelligent, seamless power supply operation system according to claim 4 or 5, characterized in that, It also includes a wireless communication unit, which is communicatively connected to the controller (2).

8. The intelligent, seamless power supply operation system according to claim 6, characterized in that, It also includes a synchronization detection device and a synchronization changeover switch (7). The synchronization detection device includes at least two sets of detection channels. The two sets of detection channels of the synchronization detection device are connected one-to-one with the two sets of switch contacts of the synchronization changeover switch (7) to realize the switching of the two sets of detection channels. One set of detection channels of the synchronization detection device is set at both ends of the first switch QF1 to detect the synchronization between the mains output terminal and the first power load branch / second power load branch. The other set of detection channels of the synchronization detection device is set at both ends of the second switch QF2 to detect the synchronization between the temporary power supply output terminal and the first power load branch / second power load branch.

Images