Method and device for determining phase state of circuit breaker, and computer readable storage medium

Abstract

The present invention discloses a method and device for determining the phase state of a circuit breaker, and a computer-readable storage medium, and relates to the technical field of power equipment monitoring. The method includes: obtaining the load-side voltage of the circuit breaker; determining the phase voltage of the three phases in the circuit breaker according to the load-side voltage; obtaining the line voltage between any two phases in the circuit breaker; selecting any phase in the circuit breaker as the target phase, and determining the phase voltage of the target phase as the target phase voltage; determining the line voltage between the target phase and the first candidate phase as the first target line voltage, and determining the line voltage between the first candidate phase and the second candidate phase as the second target line voltage; determining the phase state of the circuit breaker according to the values ​​of the target phase voltage, the first target line voltage, and the second target line voltage. The present invention solves the technical problem in the related art that when using traditional methods to judge the non-full-phase state of the circuit breaker, the state quantity parameters usually required are relatively large, and the judgment process is relatively cumbersome.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment monitoring, and in particular to a method and device for determining a phase state of a circuit breaker, and a computer-readable storage medium. Background Art

[0002] 10-35kV circuit breakers generally use three-phase linkage operating mechanisms to simplify mechanism design and reduce manufacturing costs. During the operation of the circuit breaker, due to the breakage or loosening of the transmission mechanism pin, one or two phases may fail to close or open. The three-phase linkage operating mechanism generally does not have the function of monitoring the non-full-phase state of the circuit breaker. In addition, the 10-35kV circuit breaker has a compact mechanism and small space, and it is impossible to directly observe the mechanism connecting rod to determine whether there is an abnormal state of non-full-phase closing or opening.

[0003] If the circuit breaker is not fully closed, the load may malfunction or even be damaged due to long-term operation of the non-full phase. If the circuit breaker is not fully open, the load switch or unloaded line may occur during the switching operation, causing phase-to-phase faults, endangering the safety of people, power grid and equipment, and causing great harm.

[0004] However, the existing method for judging the non-full-phase operation state of the circuit breaker is usually to judge by current, voltage, etc., which requires many state quantity parameters and is relatively cumbersome.

[0005] In view of the problem that many state quantity parameters are usually required when using traditional methods to judge the non-full-phase state of the circuit breaker in the above-mentioned related technologies, and the judgment process is relatively complicated, no effective solution has been proposed yet. Summary of the invention

[0006] The embodiments of the present invention provide a method and device for determining the phase state of a circuit breaker, and a computer-readable storage medium, so as to at least solve the technical problem in the related art that when using traditional methods to judge the non-full-phase state of a circuit breaker, a large number of state quantity parameters are usually required, and the judgment process is relatively cumbersome.

[0007] According to one aspect of an embodiment of the present invention, a method for determining a phase state of a circuit breaker is provided, comprising: obtaining a load-side voltage of the circuit breaker, wherein the load-side voltage refers to a voltage on an electrical equipment side or a load side connected to the circuit breaker; determining the phase voltages of three phases in the circuit breaker according to the load-side voltage, wherein the circuit breaker comprises: phase A, phase B and phase C, and the phase voltages comprise: phase A voltage, phase B voltage and phase C voltage; obtaining a line voltage between any two phases in the circuit breaker, wherein the line voltages comprise: AB line voltage, BC line voltage and CA line voltage, wherein the AB line voltage is the voltage between the A phase and the B phase, the BC line voltage is the voltage between the B phase and the C phase, and the CA line voltage is the voltage between the C phase and the A phase; selecting any one phase in the circuit breaker as a target phase, and determining the phase voltage of the target phase as the target phase voltage; determining the line voltage between the target phase and a first candidate phase The voltage is a first target line voltage, and the line voltage between the first candidate phase and the second candidate phase is determined to be a second target line voltage, wherein, when the target phase is the A phase, the first candidate phase is the B phase, the second candidate phase is the C phase, the first target line voltage is the AB line voltage, and the second target line voltage is the BC line voltage, when the target phase is the B phase, the first candidate phase is the C phase, the second candidate phase is the A phase, the first target line voltage is the BC line voltage, and the second target line voltage is the CA line voltage, when the target phase is the C phase, the first candidate phase is the A phase, the second candidate phase is the B phase, the first target line voltage is the CA line voltage, and the second target line voltage is the AB line voltage; the phase state of the circuit breaker is determined according to the values ​​of the target phase voltage, the first target line voltage, and the second target line voltage.

[0008] Optionally, obtaining the load side voltage of the circuit breaker includes: obtaining the load side AC voltage of the circuit breaker; and using a voltage divider to step down the load side AC voltage according to a predetermined ratio to obtain the load side voltage.

[0009] Optionally, determining the phase voltage of the three phases in the circuit breaker according to the load side voltage includes: using a live display to detect the load side voltage to obtain a phase voltage signal of each of the three phases of the circuit breaker; using a converter to convert each of the phase voltage signals to obtain the corresponding phase voltage.

[0010] Optionally, obtaining the line voltage between any two phases in the circuit breaker includes at least one of the following: directly detecting the line voltage in the circuit breaker using a voltage sensor; obtaining the corresponding line voltage by calculating the phase voltages of any two phases in the circuit breaker.

[0011] Optionally, determining the phase state of the circuit breaker according to the values ​​of the target phase voltage, the first target line voltage and the second target line voltage includes: when the target phase voltage, the first target line voltage and the second target line voltage are all zero, determining the phase state of the circuit breaker as a three-phase split, wherein the three-phase split indicates that the three phases of the circuit breaker are all in a split state; when the target phase voltage is a predetermined phase voltage and the first target line voltage and the second target line voltage are both zero, determining the phase state of the circuit breaker as a one-phase closed position and two-phase split, wherein the one-phase closed position and two-phase split indicates that one phase of the three phases of the circuit breaker is in a closed state and the other two phases are in the split state; when the target phase voltage is the predetermined phase voltage and the first target line voltage and the second target line voltage are both zero, determining the phase state of the circuit breaker as a one-phase closed position and two-phase split, wherein the one-phase closed position and two-phase split indicates that one phase of the three phases of the circuit breaker is in a closed state and the other two phases are in the split state. When at least one of the target line voltages is a half-value predetermined line voltage, or when the target phase voltage is a half-value predetermined phase voltage and the first target line voltage and the second target line voltage are different and both are not zero, the phase state of the circuit breaker is determined to be one-phase open and two-phase closed, wherein the half-value predetermined line voltage is half of the predetermined line voltage, the half-value predetermined phase voltage is half of the predetermined phase voltage, and the one-phase open and two-phase closed position indicates that one of the three phases of the circuit breaker is in the open state and the other two phases are in the closed state; when the target phase voltage is the predetermined phase voltage and the first target line voltage and the second target line voltage are both the predetermined line voltage, the phase state of the circuit breaker is determined to be three-phase closed, wherein the three-phase closed position indicates that the three phases of the circuit breaker are all in the closed state.

[0012] Optionally, when the target phase voltage is the predetermined phase voltage and at least one of the first target line voltage and the second target line voltage is a half-value predetermined line voltage, or when the target phase voltage is a half-value predetermined phase voltage and the first target line voltage and the second target line voltage are different and both are not zero, determining that the phase state of the circuit breaker is a one-phase split and two-phase combined position includes: when the target phase voltage is the predetermined phase voltage and the first target line voltage and the second target line voltage are both the half-value predetermined line voltage, determining that the one-phase split and two-phase combined position is that the first candidate phase is in the split state and the target phase and the second candidate phase are both in the closed state; when the target phase voltage is the predetermined phase voltage and the first target line voltage is the predetermined line voltage and the second target line voltage is the half-value predetermined line voltage, the one-phase split two-phase closed state is determined as the second candidate phase is in the split state and the target phase and the first candidate phase are both in the closed state; when the target phase voltage is the half-value predetermined phase voltage and the first target line voltage is the half-value predetermined line voltage and the second target line voltage is the predetermined line voltage, the one-phase split two-phase closed state is determined as the target phase is in the split state and the first candidate phase and the second candidate phase are both in the closed state.

[0013] Optionally, the method for determining the phase state of the circuit breaker further includes: obtaining a load-side AC voltage signal of the circuit breaker; when two load-side AC voltage signals are obtained, processing the two load-side AC voltage signals using a subtractor to obtain a voltage signal difference; when one load-side AC voltage signal is obtained, determining that the load-side AC voltage signal is the voltage signal difference; and calculating the effective value of the voltage signal difference by a transmitter according to a first formula, wherein the first formula is: , Y represents the effective value, y represents the voltage signal difference, and T represents the time period; the effective value is compared with a predetermined threshold value by a comparator to obtain a comparison result; when the comparison result indicates that the deviation value between the effective value and the predetermined threshold value exceeds the deviation threshold value, it is determined that the circuit breaker is in a non-full-phase state, wherein the non-full-phase state indicates a state in which the three phases of the circuit breaker cannot be disconnected or closed at the same time.

[0014] According to another aspect of an embodiment of the present invention, a phase state determination device for a circuit breaker is provided, comprising: a first acquisition unit, for acquiring a load-side voltage of the circuit breaker, wherein the load-side voltage refers to a voltage on the side of an electrical device or a load connected to the circuit breaker; a first determination unit, for determining the phase voltages of three phases in the circuit breaker according to the load-side voltage, wherein the circuit breaker comprises: phase A, phase B and phase C, and the phase voltages comprise: phase A voltage, phase B voltage and phase C voltage; a second acquisition unit, for acquiring a line voltage between any two phases in the circuit breaker, wherein the line voltages comprise: AB line voltage, BC line voltage and CA line voltage, wherein the AB line voltage is the voltage between the A phase and the B phase, the BC line voltage is the voltage between the B phase and the C phase, and the CA line voltage is the voltage between the C phase and the A phase; a second determination unit, for selecting any phase in the circuit breaker as a target phase, and determining the phase voltage of the target phase as the target phase voltage; a third determination unit, for determining The line voltage between the target phase and the first candidate phase is the first target line voltage, and the line voltage between the first candidate phase and the second candidate phase is determined to be the second target line voltage, wherein, when the target phase is the A phase, the first candidate phase is the B phase, the second candidate phase is the C phase, the first target line voltage is the AB line voltage, and the second target line voltage is the BC line voltage; when the target phase is the B phase, the first candidate phase is the C phase, the second candidate phase is the A phase, the first target line voltage is the BC line voltage, and the second target line voltage is the CA line voltage; when the target phase is the C phase, the first candidate phase is the A phase, the second candidate phase is the B phase, the first target line voltage is the CA line voltage, and the second target line voltage is the AB line voltage; a fourth determination unit is used to determine the phase state of the circuit breaker according to the values ​​of the target phase voltage, the first target line voltage, and the second target line voltage.

[0015] Optionally, the first acquisition unit includes: a first acquisition module, used to acquire the load side AC voltage of the circuit breaker; and a second acquisition module, used to use a voltage divider to reduce the load side AC voltage according to a predetermined ratio to obtain the load side voltage.

[0016] Optionally, the first determination unit includes: a third acquisition module, used to detect the load side voltage using a live display to obtain the phase voltage signal of each of the three phases of the circuit breaker; a fourth acquisition module, used to use a converter to convert each of the phase voltage signals to obtain the corresponding phase voltage.

[0017] Optionally, the second acquisition unit includes at least one of the following: a detection module, used to directly detect the line voltage in the circuit breaker using a voltage sensor; a fifth acquisition module, used to obtain the corresponding line voltage by calculating the phase voltages of any two phases in the circuit breaker.

[0018] Optionally, the fourth determination unit includes: a first determination module, used to determine that the phase state of the circuit breaker is a three-phase split when the target phase voltage, the first target line voltage and the second target line voltage are all zero, wherein the three-phase split indicates that the three phases of the circuit breaker are all in a split state; a second determination module, used to determine that the phase state of the circuit breaker is a one-phase closed position and two-phase split when the target phase voltage is a predetermined phase voltage and the first target line voltage and the second target line voltage are both zero, wherein the one-phase closed position and two-phase split indicates that one phase of the three phases of the circuit breaker is in a closed position and the other two phases are in the split state; a third determination module, used to determine that the phase state of the circuit breaker is a one-phase closed position and two-phase split when the target phase voltage is the predetermined phase voltage and at least one of the first target line voltage and the second target line voltage is The first target line voltage is a half-value predetermined line voltage, or the target phase voltage is a half-value predetermined phase voltage and the first target line voltage and the second target line voltage are different and both are not zero, determining that the phase state of the circuit breaker is a one-phase open position and two-phase closed position, wherein the half-value predetermined line voltage is half of the predetermined line voltage, the half-value predetermined phase voltage is half of the predetermined phase voltage, and the one-phase open position and two-phase closed position indicates that one of the three phases of the circuit breaker is in the open position state and the other two phases are in the closed position state; a fourth determination module is used to determine that the phase state of the circuit breaker is a three-phase closed position when the target phase voltage is the predetermined phase voltage, and the first target line voltage and the second target line voltage are both the predetermined line voltages, wherein the three-phase closed position indicates that the three phases of the circuit breaker are all in the closed position.

[0019] Optionally, the third determination module includes: a first determination submodule, used for, when the target phase voltage is the predetermined phase voltage and the first target line voltage and the second target line voltage are both the half-value predetermined line voltage, determining that the one-phase split and two-phase combination is the first candidate phase being in the split state and the target phase and the second candidate phase are both in the combined state; a second determination submodule, used for, when the target phase voltage is the predetermined phase voltage and the first target line voltage is the predetermined line voltage and the second target line voltage is the half-value predetermined line voltage, determining that the one-phase split and two-phase combination is the second candidate phase being in the split state and the target phase and the first candidate phase are both in the combined state; a third determination submodule, used for, when the target phase voltage is the half-value predetermined phase voltage and the first target line voltage is the half-value predetermined line voltage and the second target line voltage is the predetermined line voltage, determining that the one-phase split and two-phase combination is the target phase being in the split state and the first candidate phase and the second candidate phase are both in the combined state.

[0020] Optionally, the phase state determination device of the circuit breaker further includes: a third acquisition unit, used to acquire the load-side AC voltage signal of the circuit breaker; a fourth acquisition unit, used to process the two load-side AC voltage signals by using a subtractor to obtain a voltage signal difference when two load-side AC voltage signals are acquired; a fifth determination unit, used to determine that the load-side AC voltage signal is the voltage signal difference when one load-side AC voltage signal is acquired; and a calculation unit, used to calculate the effective value of the voltage signal difference according to a first formula through a transmitter, wherein the first formula is: , Y represents the effective value, y represents the voltage signal difference, and T represents the time period; a fifth acquisition unit is used to compare the effective value with a predetermined threshold value through a comparator to obtain a comparison result; a sixth determination unit is used to determine that the circuit breaker is in a non-full-phase state when the comparison result indicates that the deviation value between the effective value and the predetermined threshold value exceeds the deviation threshold value, wherein the non-full-phase state indicates a state in which the three phases of the circuit breaker cannot be disconnected or closed at the same time.

[0021] According to another aspect of an embodiment of the present invention, a phase state determination system for a circuit breaker is further provided. The phase state determination system for a circuit breaker uses any one of the above-mentioned phase state determination methods for a circuit breaker.

[0022] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is further provided, wherein the computer-readable storage medium includes a stored program, wherein the program executes any one of the above-mentioned methods for determining a phase state of a circuit breaker.

[0023] According to another aspect of an embodiment of the present invention, a processor is further provided, the processor being used to run a program, wherein the program executes any one of the above-mentioned methods for determining a phase state of a circuit breaker when running.

[0024] According to another aspect of an embodiment of the present invention, a computer program product is further provided, comprising computer instructions, wherein when the computer instructions are executed by a processor, any one of the above-mentioned methods for determining a phase state of a circuit breaker is executed.

[0025] In an embodiment of the present invention, a load-side voltage of a circuit breaker is obtained, wherein the load-side voltage refers to a voltage on an electrical device side or a load side connected to the circuit breaker; a phase voltage of three phases in the circuit breaker is determined according to the load-side voltage, wherein the circuit breaker includes: phase A, phase B and phase C, and the phase voltage includes: phase A voltage, phase B voltage and phase C voltage; a line voltage between any two phases in the circuit breaker is obtained, wherein the line voltage includes: AB line voltage, BC line voltage and CA line voltage, AB line voltage is the voltage between phase A and phase B, BC line voltage is the voltage between phase B and phase C, and CA line voltage is the voltage between phase C and phase A; any phase in the circuit breaker is selected as a target phase, and the phase voltage of the target phase is determined as the target phase voltage; the line voltage between the target phase and the first candidate phase is determined The voltage is the first target line voltage, and the line voltage between the first candidate phase and the second candidate phase is determined to be the second target line voltage, wherein, when the target phase is phase A, the first candidate phase is phase B, the second candidate phase is phase C, the first target line voltage is the AB line voltage, and the second target line voltage is the BC line voltage, when the target phase is phase B, the first candidate phase is phase C, the second candidate phase is phase A, the first target line voltage is the BC line voltage, and the second target line voltage is the CA line voltage, when the target phase is phase C, the first candidate phase is phase A, the second candidate phase is phase B, the first target line voltage is the CA line voltage, and the second target line voltage is the AB line voltage; the phase state of the circuit breaker is determined according to the values ​​of the target phase voltage, the first target line voltage and the second target line voltage. Through the above technical scheme, the purpose of judging the phase state of the circuit breaker according to the combination of the phase voltage and the line voltage by sampling only the phase voltage on the load side and generating the line voltage is achieved, and the technical effect of judging the phase state of the circuit breaker using fewer state quantities is achieved, which simplifies the judgment logic, thereby solving the technical problem in the related art that when using traditional methods to judge the non-full-phase state of the circuit breaker, the state quantity parameters usually required are large and the judgment process is complicated. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 It is a hardware structure block diagram of a mobile terminal of a method for determining a phase state of a circuit breaker according to an embodiment of the present invention;

[0028] Figure 2 is a flow chart of a method for determining a phase state of a circuit breaker according to an embodiment of the present invention;

[0029] FIG3( a ) is a schematic diagram of a star load connection according to an embodiment of the present invention;

[0030] FIG3( b ) is a schematic diagram of a delta load connection according to an embodiment of the present invention;

[0031] Figure 4 is a schematic diagram of a circuit breaker non-full-phase state monitoring logic according to an embodiment of the present invention;

[0032] Figure 5 is a schematic diagram of the logic of the “∩ / #” analog comparison and logic judgment module according to an embodiment of the present invention;

[0033] Figure 6 is a schematic diagram of a phase state determination device for a circuit breaker according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] As introduced in the background technology, the conventional method used in the related art to judge the non-full-phase state of the circuit breaker usually requires many state quantity parameters, and the judgment process is relatively cumbersome. In view of the above defects, a method and device for determining the phase state of a circuit breaker and a computer-readable storage medium are provided in the embodiments of the present invention.

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0038] The method embodiments provided in the embodiments of the present invention can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 FIG. 1 is a hardware structure block diagram of a mobile terminal of a method for determining a phase state of a circuit breaker according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0039] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the phase state determination method of the circuit breaker in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the above method is implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories can be connected to the mobile terminal through a network. Examples of the above network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0040] According to an embodiment of the present invention, a method embodiment of a method for determining a phase state of a circuit breaker is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0041] Figure 2 is a flow chart of a method for determining a phase state of a circuit breaker according to an embodiment of the present invention. Figure 2 As shown, the method comprises the following steps:

[0042] Step S202, obtaining the load-side voltage of the circuit breaker, wherein the load-side voltage refers to the voltage on the side of the electrical equipment or the load connected to the circuit breaker.

[0043] In this embodiment, the phase voltage of the circuit breaker can be further determined by detecting the voltage on the load side of the circuit breaker, so as to judge the phase state of the circuit breaker, that is, the phase state of the circuit breaker can be judged only according to the voltage on the load side of the circuit breaker.

[0044] According to the above embodiment of the present invention, in the above step S202, obtaining the load side voltage of the circuit breaker includes: obtaining the load side AC voltage of the circuit breaker; and using a voltage divider to reduce the load side AC voltage according to a predetermined ratio to obtain the load side voltage.

[0045] In this embodiment, a 10-35 kV circuit breaker is taken as an example for explanation.

[0046] Specifically, the AC voltage on the load side of the circuit breaker can be obtained first. Since the detected voltage of 10-35kV is much higher than the voltage level at which the low-voltage equipment can work safely, it is necessary to use a voltage divider (such as a capacitive voltage divider or a resistive voltage divider) to reduce the voltage to a safe level.

[0047] Step S204, determining the three-phase phase voltages in the circuit breaker according to the load side voltage, wherein the circuit breaker includes: phase A, phase B and phase C, and the phase voltages include: phase A voltage, phase B voltage and phase C voltage.

[0048] In this embodiment, the phase voltage of each phase in the circuit breaker can be determined based on the voltage on the load side of the circuit breaker. The circuit breaker usually has three phases: phase A, phase B and phase C. The phase voltage of the circuit breaker usually refers to the phase voltage of each phase, namely, phase A voltage, phase B voltage and phase C voltage.

[0049] According to the above embodiment of the present invention, in the above step S204, the phase voltages of the three phases in the circuit breaker are determined according to the load side voltage, including: using a live display to detect the load side voltage to obtain a phase voltage signal of each of the three phases of the circuit breaker; using a converter to convert each phase voltage signal to obtain a corresponding phase voltage.

[0050] The above embodiment of the present invention is described in detail below in conjunction with Figure 3 (a) and Figure 3 (b). Figure 3 (a) is a schematic diagram of a star load connection according to an embodiment of the present invention, and Figure 3 (b) is a schematic diagram of a triangle load connection according to an embodiment of the present invention.

[0051] Specifically, the voltage divider is usually installed in the switch cabinet and connected to the outgoing line terminal; the divided voltage can be measured and displayed by a voltage detection device (such as a live display), which usually has a three-phase voltage detection function and can display the voltage value of each phase separately; for example, as shown in Figure 3 (a) and Figure 3 (b) above, the switch cabinet live display can be used to display the phase voltage of each phase in the circuit breaker; for further data processing, such as in an automatic monitoring system, these voltage signals may need to be converted into signals suitable for digital processing. This can be achieved by an analog-to-digital converter (ADC) to convert the analog voltage signal into a digital signal.

[0052] The phase voltage obtained by the above method has the following relationship with the AC voltage on the load side of the circuit breaker: 1) Amplitude ratio: The phase voltage obtained by the voltage divider is the value of the original AC voltage after being reduced by a certain ratio; for example, if the ratio of a voltage divider is 1000:1, then when the AC voltage on the load side is 10kV, the voltage output by the voltage divider is 10V; 2) Phase relationship: The phase voltage after voltage division maintains the phase relationship of the original AC voltage; that is, if the original voltages differ by 120°, the voltage after voltage division should also maintain such a phase difference; 3) Same frequency: The voltage after voltage division has the same frequency as the original voltage. In a 50Hz or 60Hz system, the voltage frequency after voltage division should also be 50Hz or 60Hz; 4) Real-time reflection: The obtained phase voltage should be able to reflect the voltage status on the load side in real time for accurate monitoring and judgment; Through the above method, the phase voltage on the load side of the circuit breaker can be effectively obtained, and the voltage information can be used to monitor the working status of the circuit breaker, such as whether there is a non-full-phase closing or opening situation, which is crucial to ensure the safe operation of the power system.

[0053] Step S206, obtaining the line voltage between any two phases in the circuit breaker, wherein the line voltage includes: AB line voltage, BC line voltage and CA line voltage, AB line voltage is the voltage between phase A and phase B, BC line voltage is the voltage between phase B and phase C, CA line voltage is the voltage between phase C and phase A.

[0054] In this embodiment, the line voltage can be determined by obtaining the phase voltage of the circuit breaker. The line voltage is generally the voltage between any two different phases in the circuit breaker; for example, the AB line voltage is the voltage between phase A and phase B, the BC line voltage is the voltage between phase B and phase C, and the CA line voltage is the voltage between phase C and phase A.

[0055] According to the above embodiment of the present invention, in the above step S206, the line voltage between any two phases in the circuit breaker is obtained, including at least one of the following: using a voltage sensor to directly detect the line voltage in the circuit breaker; obtaining the corresponding line voltage by calculating the phase voltage between any two phases in the circuit breaker.

[0056] Specifically, the line voltage output from the circuit breaker can be directly detected by using a voltage sensor installed on the outgoing line side (load side) of the circuit breaker; the line voltage can also be calculated using the phase voltage of the circuit breaker. In the star connection, the phase voltage is the voltage across any phase winding, and the line voltage is the voltage between any two different phases. The line voltage is the phase voltage. times; in the triangle connection, the phase voltage is the voltage between any two adjacent windings, and the line voltage is equal to the phase voltage.

[0057] Step S208, selecting any phase in the circuit breaker as the target phase, and determining the phase voltage of the target phase as the target phase voltage.

[0058] In this embodiment, any phase in the circuit breaker can be selected as the target phase, and then the phase voltage of the target phase is used as the phase voltage when judging the phase state of the circuit breaker.

[0059] Step S210, determine that the line voltage between the target phase and the first candidate phase is the first target line voltage, and determine that the line voltage between the first candidate phase and the second candidate phase is the second target line voltage, wherein, when the target phase is phase A, the first candidate phase is phase B, the second candidate phase is phase C, the first target line voltage is the AB line voltage, and the second target line voltage is the BC line voltage; when the target phase is phase B, the first candidate phase is phase C, the second candidate phase is phase A, the first target line voltage is the BC line voltage, and the second target line voltage is the CA line voltage; when the target phase is phase C, the first candidate phase is phase A, the second candidate phase is phase B, the first target line voltage is the CA line voltage, and the second target line voltage is the AB line voltage.

[0060] In this embodiment, one of the three phases of the circuit breaker can be selected as the first candidate phase and the other phase as the second candidate phase, and then the line voltage between the target phase and the first candidate phase and the line voltage between the first candidate phase and the second candidate phase are used as the line voltages for judging the phase state of the circuit breaker.

[0061] Specifically, when the target phase is phase A, the first candidate phase can be selected as phase B, the second candidate phase can be selected as phase C, the first target line voltage can be selected as the AB line voltage, and the second target line voltage can be selected as the BC line voltage; when the target phase is phase B, the first candidate phase can be selected as phase C, the second candidate phase can be selected as phase A, the first target line voltage can be selected as the BC line voltage, and the second target line voltage can be selected as the CA line voltage; when the target phase is phase C, the first candidate phase can be selected as phase A, the second candidate phase can be selected as phase B, the first target line voltage can be selected as the CA line voltage, and the second target line voltage can be selected as the AB line voltage.

[0062] It should be noted that the selection of the target phase voltage, the first target line voltage and the second target line voltage here only selects a set of data to judge the phase state of the circuit breaker.

[0063] Step S212, determining the phase state of the circuit breaker according to the values ​​of the target phase voltage, the first target line voltage and the second target line voltage.

[0064] In this embodiment, the phase state of the circuit breaker may be determined according to a combination of values ​​of the target phase voltage, the first target line voltage, and the second target line voltage.

[0065] According to the above embodiment of the present invention, in the above step S212, the phase state of the circuit breaker is determined according to the values ​​of the target phase voltage, the first target line voltage and the second target line voltage, including: when the target phase voltage, the first target line voltage and the second target line voltage are all zero, the phase state of the circuit breaker is determined to be three-phase split, wherein the three-phase split indicates that the three phases of the circuit breaker are all in a split state; when the target phase voltage is a predetermined phase voltage and the first target line voltage and the second target line voltage are both zero, the phase state of the circuit breaker is determined to be one-phase closed position and two-phase split, wherein the one-phase closed position and two-phase split indicates that one phase of the three phases of the circuit breaker is in a closed position and the other two phases are in a split state; when the target phase voltage is a predetermined phase voltage and the first target line voltage and the second target line voltage are both zero, the phase state of the circuit breaker is determined to be one-phase closed position and two-phase split, wherein the one-phase closed position and two-phase split indicates that one phase of the three phases of the circuit breaker is in a closed position and the other two phases are in a split state; When at least one of the target line voltage and the second target line voltage is a half-value predetermined line voltage, or the target phase voltage is a half-value predetermined phase voltage and the first target line voltage and the second target line voltage are different and both are not zero, the phase state of the circuit breaker is determined to be one-phase open and two-phase closed, wherein the half-value predetermined line voltage is half of the predetermined line voltage, and the half-value predetermined phase voltage is half of the predetermined phase voltage. The one-phase open and two-phase closed position indicates that one of the three phases of the circuit breaker is in an open state and the other two phases are in a closed state; when the target phase voltage is the predetermined phase voltage, and the first target line voltage and the second target line voltage are both predetermined line voltages, the phase state of the circuit breaker is determined to be three-phase closed, wherein the three-phase closed position indicates that all three phases of the circuit breaker are in a closed state.

[0066] Specifically, the logic of determining the phase state of the circuit breaker based on the combination of the values ​​of one phase voltage and two line voltages can be inferred based on the values ​​of the phase voltage and the line voltage when the circuit breaker is in various phase states.

[0067] In the above embodiment of the present invention, when the target phase voltage is a predetermined phase voltage and at least one of the first target line voltage and the second target line voltage is a half-value predetermined line voltage, or when the target phase voltage is a half-value predetermined phase voltage and the first target line voltage and the second target line voltage are different and both are not zero, determining the phase state of the circuit breaker as a one-phase split and two-phase combined position includes: when the target phase voltage is a predetermined phase voltage and the first target line voltage and the second target line voltage are both half-value predetermined line voltages, determining the one-phase split and two-phase combined position as the first candidate phase is in a split state and the target phase and The second candidate phases are all in the closed state; when the target phase voltage is the predetermined phase voltage, the first target line voltage is the predetermined line voltage, and the second target line voltage is the half-value predetermined line voltage, the one-phase split and two-phase closed state is determined as the second candidate phase is in the split state and the target phase and the first candidate phase are both in the closed state; when the target phase voltage is half-value predetermined phase voltage, the first target line voltage is half-value predetermined line voltage, and the second target line voltage is the predetermined line voltage, the one-phase split and two-phase closed state is determined as the target phase is in the split state and the first candidate phase and the second candidate phase are both in the closed state.

[0068] When making a specific judgment, the phase states of three-phase separation, one-phase combination, two-phase separation, and three-phase combination can be judged by the values ​​of any phase voltage and any two line voltages, while the state of one-phase separation and two-phase combination needs to be judged by the combination of phase voltage and line voltage to determine which phase separation and which two phase combination. For the judgment of the phase states of three-phase separation, one-phase combination, two-phase separation, and three-phase combination, the selection of the target phase, the first candidate phase, and the third candidate phase does not need to be strictly defined.

[0069] First, based on the values ​​of phase voltage and line voltage when the circuit breaker is in various phase states, the logic of judging the phase state of the circuit breaker based on the combination of the values ​​of one phase voltage and two line voltages is inferred. The specific process is as follows:

[0070] 1) When the circuit breaker is normally opened, the three-phase voltage on the outgoing line side is zero;

[0071] 2) Only one phase is in the closed position, and the other two phases are in the open position. Taking phase A in the closed position and phases B and C in the open position as an example, whether it is a star load or a triangle load, the voltage of phase A is transmitted to phases B and C through the load, that is, the line voltage of phases B and C is , All three-phase lines carry A-phase voltage, so the line voltage is zero. , is the phase voltage on the load side of phases B and C of the circuit breaker, the same below;

[0072] 3) Two phases are in the closed position, and the other phase is in the open position. For example, phases B and C are in the closed position, and phase A is in the open position. Phases B and C carry phase voltage. ,but , , since the three-phase load is symmetrical, , , ,in, is the phase voltage on the load side of phase A of the circuit breaker, , , is the three-phase line voltage on the load side of the circuit breaker, the same below.

[0073] 4) When the three phases are in the closed position, the three phases on the outgoing line side have symmetrical phase voltages.

[0074] From the above content, the values ​​of the phase voltage and the line voltage of the circuit breaker in various phase states are as shown in Table 1, and the judgment logic of judging the phase state of the circuit breaker according to the combination of the values ​​of one phase voltage and two line voltages is as shown in Table 2. Table 1 shows the values ​​of each phase voltage and the line voltage in various phase states of the circuit breaker, and Table 2 shows the logic of judging the phase state of the circuit breaker according to the combination of the values ​​of one phase voltage and two line voltages when phase A is the target phase, phase B is the first candidate phase, and phase C is the second candidate phase.

[0075] Table 1

[0076]

[0077] Table 2

[0078]

[0079] According to the above embodiment of the present invention, the method for determining the phase state of the circuit breaker further includes: obtaining a load-side AC voltage signal of the circuit breaker; when two load-side AC voltage signals are obtained, processing the two load-side AC voltage signals by a subtractor to obtain a voltage signal difference; when one load-side AC voltage signal is obtained, determining that the load-side AC voltage signal is a voltage signal difference; and calculating the effective value of the voltage signal difference by a transmitter according to a first formula, wherein the first formula is: , Y represents the effective value, y represents the voltage signal difference, and T represents the time period; the effective value is compared with the predetermined threshold by a comparator to obtain a comparison result; when the comparison result indicates that the deviation value between the effective value and the predetermined threshold exceeds the deviation threshold, it is determined that the circuit breaker is in a non-full-phase state, wherein the non-full-phase state indicates a state in which the three phases of the circuit breaker cannot be disconnected or closed at the same time.

[0080] Combine the following Figure 4 and Figure 5 The above embodiments of the present invention are described in detail. Figure 4 is a schematic diagram of a circuit breaker non-full-phase state monitoring logic according to an embodiment of the present invention, Figure 5 4 is a schematic diagram of the logic of the “∩ / #” analog comparison and logic judgment module according to an embodiment of the present invention.

[0081] As above Figure 4 As shown, the line voltage can be generated by comparing the difference between the two-phase voltages through the "∩ / #" module, that is, the analog comparison and logic judgment module, and then the effective value of the line voltage is calculated and compared with the preset voltage threshold. If the effective value is within the allowable range of the threshold, the circuit breaker is considered to be in a normal state; if it is out of the range, it is considered that there is a non-full-phase situation. This method can effectively monitor the non-full-phase state of the circuit breaker.

[0082] like Figure 5 As shown in the figure, when using the "∩ / #" module for judgment, the two input signals x1 and x2 are first subtracted by a subtractor, and the output result is y=x1-x2. The function here is to generate line voltage. The two input signals of the subtractor usually represent two-phase voltage. If only x1 is input, y is equal to x1, that is, y=x1; then the transmitter is used to convert the analog signal into a digital signal, that is, the effective value of y is calculated through the transmitter. Finally, the comparator is used to compare the effective value Y with each output judgment value (i=1, 2, 3) are compared, when the effective value Y is equal to each output judgment value (i=1, 2, 3) deviation is less than the threshold , the output is 1, otherwise it is 0, that is , , Represents the effective value Y and the i-th output judgment value When the output of the comparator is 0, it indicates that the circuit breaker is in a non-full-phase state.

[0083] As can be seen from the above, through the technical solution provided by the above embodiment of the present invention, the load side voltage of the circuit breaker can be obtained, wherein the load side voltage refers to the voltage on the side of the electrical equipment or the load side connected to the circuit breaker; the phase voltages of the three phases in the circuit breaker are determined according to the load side voltage, wherein the circuit breaker includes: phase A, phase B and phase C, and the phase voltages include: phase A voltage, phase B voltage and phase C voltage; the line voltage between any two phases in the circuit breaker is obtained, wherein the line voltages include: AB line voltage, BC line voltage and CA line voltage, AB line voltage is the voltage between phase A and phase B, BC line voltage is the voltage between phase B and phase C, and CA line voltage is the voltage between phase C and phase A; any phase in the circuit breaker is selected as the target phase, and the phase voltage of the target phase is determined as the target phase voltage; the line voltage between the target phase and the first candidate phase is determined as the first target line voltage, and the line voltage between the first candidate phase and the second candidate phase is determined as the second target line voltage, Among them, when the target phase is phase A, the first candidate phase is phase B, the second candidate phase is phase C, the first target line voltage is the AB line voltage, and the second target line voltage is the BC line voltage. When the target phase is phase B, the first candidate phase is phase C, the second candidate phase is phase A, the first target line voltage is the BC line voltage, and the second target line voltage is the CA line voltage. When the target phase is phase C, the first candidate phase is phase A, the second candidate phase is phase B, the first target line voltage is the CA line voltage, and the second target line voltage is the AB line voltage. The phase state of the circuit breaker is determined according to the values ​​of the target phase voltage, the first target line voltage and the second target line voltage, so as to achieve the purpose of judging the phase state of the circuit breaker according to the combination of the values ​​of the phase voltage and the line voltage by only sampling the phase voltage on the load side and generating the line voltage, and realizing the technical effect of judging the phase state of the circuit breaker using fewer state quantities and simplifying the judgment logic.

[0084] Therefore, the technical solution provided by the above-mentioned embodiment of the present invention solves the technical problem in the related art that when using traditional methods to judge the non-full-phase state of the circuit breaker, many state quantity parameters are usually required and the judgment process is relatively complicated.

[0085] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0086] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0087] According to an embodiment of the present invention, there is also provided a phase state determination device for a circuit breaker for implementing the above-mentioned phase state determination method for a circuit breaker. Figure 6 is a schematic diagram of a phase state determination device of a circuit breaker according to an embodiment of the present invention. Figure 6 As shown, the device includes: a first acquisition unit 601, a first determination unit 603, a second acquisition unit 605, a second determination unit 607, a third determination unit 609 and a fourth determination unit 611. The phase state determination device of the circuit breaker is described in detail below.

[0088] The first acquisition unit 601 is used to acquire the load side voltage of the circuit breaker, wherein the load side voltage refers to the voltage on the electrical equipment side or the load side connected to the circuit breaker.

[0089] The first determination unit 603 is used to determine the phase voltages of the three phases in the circuit breaker according to the load side voltage, wherein the circuit breaker includes: phase A, phase B and phase C, and the phase voltages include: phase A voltage, phase B voltage and phase C voltage.

[0090] The second acquisition unit 605 is used to acquire the line voltage between any two phases in the circuit breaker, wherein the line voltage includes: AB line voltage, BC line voltage and CA line voltage, AB line voltage is the voltage between phase A and phase B, BC line voltage is the voltage between phase B and phase C, CA line voltage is the voltage between phase C and phase A.

[0091] The second determining unit 607 is used to select any phase in the circuit breaker as a target phase, and determine the phase voltage of the target phase as the target phase voltage.

[0092] The third determination unit 609 is used to determine that the line voltage between the target phase and the first candidate phase is the first target line voltage, and to determine that the line voltage between the first candidate phase and the second candidate phase is the second target line voltage, wherein, when the target phase is phase A, the first candidate phase is phase B, the second candidate phase is phase C, the first target line voltage is the AB line voltage, and the second target line voltage is the BC line voltage; when the target phase is phase B, the first candidate phase is phase C, the second candidate phase is phase A, the first target line voltage is the BC line voltage, and the second target line voltage is the CA line voltage; when the target phase is phase C, the first candidate phase is phase A, the second candidate phase is phase B, the first target line voltage is the CA line voltage, and the second target line voltage is the AB line voltage.

[0093] The fourth determining unit 611 is used to determine the phase state of the circuit breaker according to the values ​​of the target phase voltage, the first target line voltage and the second target line voltage.

[0094] It should be noted here that the above-mentioned first acquisition unit 601, first determination unit 603, second acquisition unit 605, second determination unit 607, third determination unit 609 and fourth determination unit 611 correspond to steps S202 to S212 in the above-mentioned embodiments, and the six units are the same as the instances and application scenarios implemented by the corresponding steps, but are not limited to the contents disclosed in the above-mentioned embodiments.

[0095] As can be seen from the above, in the scheme recorded in the above-mentioned embodiment of the present invention, the first acquisition unit can be used to acquire the load side voltage of the circuit breaker, wherein the load side voltage refers to the voltage on the side of the electrical equipment or the load side connected to the circuit breaker; then the first determination unit is used to determine the phase voltages of the three phases in the circuit breaker according to the load side voltage, wherein the circuit breaker includes: phase A, phase B and phase C, and the phase voltages include: phase A voltage, phase B voltage and phase C voltage; then the second acquisition unit is used to acquire the line voltage between any two phases in the circuit breaker, wherein the line voltages include: AB line voltage, BC line voltage and CA line voltage, AB line voltage is the voltage between phase A and phase B, BC line voltage is the voltage between phase B and phase C, and CA line voltage is the voltage between phase C and phase A; then the second determination unit is used to select any phase in the circuit breaker as the target phase, and determine the phase voltage of the target phase as the target phase voltage; then the third determination unit is used to determine the line voltage between the target phase and the first candidate phase as the first target line voltage, and determine the line voltage between the first candidate phase and the second candidate phase. The line voltage between the phases is the second target line voltage, wherein, when the target phase is phase A, the first candidate phase is phase B, the second candidate phase is phase C, the first target line voltage is the AB line voltage, and the second target line voltage is the BC line voltage; when the target phase is phase B, the first candidate phase is phase C, the second candidate phase is phase A, the first target line voltage is the BC line voltage, and the second target line voltage is the CA line voltage; when the target phase is phase C, the first candidate phase is phase A, the second candidate phase is phase B, the first target line voltage is the CA line voltage, and the second target line voltage is the AB line voltage; finally, the fourth determination unit is used to determine the phase state of the circuit breaker according to the values ​​of the target phase voltage, the first target line voltage and the second target line voltage, so as to achieve the purpose of judging the phase state of the circuit breaker according to the combination of the values ​​of the phase voltage and the line voltage by only sampling the phase voltage on the load side and generating the line voltage, and realize the technical effect of judging the phase state of the circuit breaker using fewer state quantities, and simplifying the judgment logic.

[0096] Therefore, the technical solution provided by the above-mentioned embodiment of the present invention solves the technical problem in the related art that when using traditional methods to judge the non-full-phase state of the circuit breaker, many state quantity parameters are usually required and the judgment process is relatively complicated.

[0097] Optionally, the first acquisition unit includes: a first acquisition module for acquiring the load-side AC voltage of the circuit breaker; and a second acquisition module for using a voltage divider to step down the load-side AC voltage according to a predetermined ratio to obtain the load-side voltage.

[0098] Optionally, the first determination unit includes: a third acquisition module, used to detect the load side voltage using a live display to obtain the phase voltage signal of each of the three phases of the circuit breaker; a fourth acquisition module, used to use a converter to convert each phase voltage signal to obtain the corresponding phase voltage.

[0099] Optionally, the second acquisition unit includes at least one of the following: a detection module, used to directly detect the line voltage in the circuit breaker using a voltage sensor; a fifth acquisition module, used to obtain the corresponding line voltage by calculating the phase voltages of any two phases in the circuit breaker.

[0100] Optionally, the fourth determination unit includes: a first determination module, which is used to determine that the phase state of the circuit breaker is a three-phase split when the target phase voltage, the first target line voltage and the second target line voltage are all zero, wherein the three-phase split indicates that the three phases of the circuit breaker are all in a split state; a second determination module, which is used to determine that the phase state of the circuit breaker is a one-phase closed position and two-phase split when the target phase voltage is a predetermined phase voltage and the first target line voltage and the second target line voltage are both zero, wherein the one-phase closed position and two-phase split indicates that one phase of the three phases of the circuit breaker is in a closed position and the other two phases are in a split state; a third determination module, which is used to determine that the phase state of the circuit breaker is a one-phase closed position and two-phase split when the target phase voltage is a predetermined phase voltage and the first target line voltage and the second target line voltage are both zero. When at least one of the target phase voltages is half the predetermined line voltage, or the target phase voltage is half the predetermined phase voltage and the first target line voltage and the second target line voltage are different and both are not zero, the phase state of the circuit breaker is determined to be one-phase open and two-phase closed, wherein the half-value predetermined line voltage is half of the predetermined line voltage, the half-value predetermined phase voltage is half of the predetermined phase voltage, and the one-phase open and two-phase closed position indicates that one of the three phases of the circuit breaker is in an open state and the other two phases are in a closed state; a fourth determination module is used to determine that the phase state of the circuit breaker is three-phase closed when the target phase voltage is the predetermined phase voltage and the first target line voltage and the second target line voltage are both predetermined line voltages, wherein the three-phase closed position indicates that all three phases of the circuit breaker are in a closed state.

[0101] Optionally, the third determination module includes: a first determination submodule, used to determine that the one-phase split and two-phase combination is the first candidate phase in the split state and the target phase and the second candidate phase are both in the closed state when the target phase voltage is the predetermined phase voltage and the first target line voltage and the second target line voltage are both half-value predetermined line voltages; a second determination submodule, used to determine that the one-phase split and two-phase combination is the second candidate phase in the split state and the target phase and the first candidate phase are both in the closed state when the target phase voltage is the predetermined phase voltage and the first target line voltage is the predetermined line voltage and the second target line voltage is half-value predetermined line voltage; a third determination submodule, used to determine that the one-phase split and two-phase combination is the target phase in the split state and the first candidate phase and the second candidate phase are both in the closed state when the target phase voltage is half-value predetermined phase voltage and the first target line voltage is half-value predetermined line voltage and the second target line voltage is the predetermined line voltage.

[0102] Optionally, the phase state determination device of the circuit breaker further includes: a third acquisition unit, used to acquire the load-side AC voltage signal of the circuit breaker; a fourth acquisition unit, used to process the two load-side AC voltage signals by a subtractor to obtain a voltage signal difference when two load-side AC voltage signals are acquired; a fifth determination unit, used to determine that the load-side AC voltage signal is a voltage signal difference when one load-side AC voltage signal is acquired; and a calculation unit, used to calculate the effective value of the voltage signal difference according to a first formula through a transmitter, wherein the first formula is: , Y represents the effective value, y represents the voltage signal difference, and T represents the time period; a fifth acquisition unit is used to compare the effective value with a predetermined threshold value through a comparator to obtain a comparison result; a sixth determination unit is used to determine that the circuit breaker is in a non-full-phase state when the comparison result indicates that the deviation value between the effective value and the predetermined threshold value exceeds the deviation threshold value, wherein the non-full-phase state indicates a state in which the three phases of the circuit breaker cannot be disconnected or closed at the same time.

[0103] According to another aspect of an embodiment of the present invention, a phase state determination system for a circuit breaker is further provided. The phase state determination system for a circuit breaker uses any one of the above-mentioned phase state determination methods for a circuit breaker.

[0104] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is further provided. The computer-readable storage medium includes a stored program, wherein the program executes any one of the above-mentioned methods for determining a phase state of a circuit breaker.

[0105] Optionally, in this embodiment, the computer-readable storage medium may be located in any one of the computer terminals in a computer terminal group in a computer network, or in any one of the communication devices in a communication device group.

[0106] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: obtaining the load-side voltage of the circuit breaker, wherein the load-side voltage refers to the voltage on the side of the electrical equipment or the load connected to the circuit breaker; determining the phase voltages of the three phases in the circuit breaker according to the load-side voltage, wherein the circuit breaker includes: phase A, phase B and phase C, and the phase voltages include: phase A voltage, phase B voltage and phase C voltage; obtaining the line voltage between any two phases in the circuit breaker, wherein the line voltages include: AB line voltage, BC line voltage and CA line voltage, AB line voltage is the voltage between phase A and phase B, BC line voltage is the voltage between phase B and phase C, and CA line voltage is the voltage between phase C and phase A; selecting any phase in the circuit breaker as the target phase, and determining the phase voltage of the target phase as the target phase voltage; Determine that the line voltage between the target phase and the first candidate phase is the first target line voltage, and determine that the line voltage between the first candidate phase and the second candidate phase is the second target line voltage, wherein, when the target phase is phase A, the first candidate phase is phase B, the second candidate phase is phase C, the first target line voltage is the AB line voltage, and the second target line voltage is the BC line voltage; when the target phase is phase B, the first candidate phase is phase C, the second candidate phase is phase A, the first target line voltage is the BC line voltage, and the second target line voltage is the CA line voltage; when the target phase is phase C, the first candidate phase is phase A, the second candidate phase is phase B, the first target line voltage is the CA line voltage, and the second target line voltage is the AB line voltage; determine the phase state of the circuit breaker according to the values ​​of the target phase voltage, the first target line voltage, and the second target line voltage.

[0107] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: obtaining the load-side AC voltage of the circuit breaker; and using a voltage divider to step down the load-side AC voltage according to a predetermined ratio to obtain the load-side voltage.

[0108] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: using a live display to detect the load side voltage to obtain a phase voltage signal of each of the three phases of the circuit breaker; using a converter to convert each phase voltage signal to obtain a corresponding phase voltage.

[0109] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: directly detecting the line voltage in the circuit breaker using a voltage sensor; and obtaining the corresponding line voltage by calculating the phase voltages of any two phases in the circuit breaker.

[0110] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: when the target phase voltage, the first target line voltage, and the second target line voltage are all zero, determining the phase state of the circuit breaker to be a three-phase split, wherein the three-phase split indicates that the three phases of the circuit breaker are all in a split state; when the target phase voltage is a predetermined phase voltage and the first target line voltage and the second target line voltage are both zero, determining the phase state of the circuit breaker to be a one-phase closed position and two-phase split, wherein the one-phase closed position and two-phase split indicates that one of the three phases of the circuit breaker is in a closed position and the other two phases are in a split state; when the target phase voltage is a predetermined phase voltage and the first target line voltage and the second target line voltage are both zero, determining the phase state of the circuit breaker to be a one-phase closed position and two-phase split, wherein the one-phase closed position and two-phase split indicates that one of the three phases of the circuit breaker is in a closed position and the other two phases are in a split state; When at least one of the voltages is a half-value predetermined line voltage, or the target phase voltage is a half-value predetermined phase voltage and the first target line voltage and the second target line voltage are different and both are not zero, the phase state of the circuit breaker is determined to be one-phase open and two-phase closed, wherein the half-value predetermined line voltage is half of the predetermined line voltage, and the half-value predetermined phase voltage is half of the predetermined phase voltage. The one-phase open and two-phase closed position indicates that one of the three phases of the circuit breaker is in an open state and the other two phases are in a closed state; when the target phase voltage is the predetermined phase voltage, and the first target line voltage and the second target line voltage are both predetermined line voltages, the phase state of the circuit breaker is determined to be three-phase closed, wherein the three-phase closed position indicates that all three phases of the circuit breaker are in a closed state.

[0111] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: when the target phase voltage is a predetermined phase voltage and the first target line voltage and the second target line voltage are both half-value predetermined line voltages, determining that the one-phase split and two-phase combination is the first candidate phase in a split state and the target phase and the second candidate phase are both in a closed state; when the target phase voltage is a predetermined phase voltage and the first target line voltage is a predetermined line voltage and the second target line voltage is a half-value predetermined line voltage, determining that the one-phase split and two-phase combination is the second candidate phase in a split state and the target phase and the first candidate phase are both in a closed state; when the target phase voltage is half-value predetermined phase voltage and the first target line voltage is half-value predetermined line voltage and the second target line voltage is a predetermined line voltage, determining that the one-phase split and two-phase combination is the target phase in a split state and the first candidate phase and the second candidate phase are both in a closed state.

[0112] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: obtaining a load-side AC voltage signal of a circuit breaker; in the case of obtaining two load-side AC voltage signals, processing the two load-side AC voltage signals using a subtractor to obtain a voltage signal difference; in the case of obtaining one load-side AC voltage signal, determining that the load-side AC voltage signal is a voltage signal difference; and calculating the effective value of the voltage signal difference by a transmitter according to a first formula, wherein the first formula is: , Y represents the effective value, y represents the voltage signal difference, and T represents the time period; the effective value is compared with the predetermined threshold by a comparator to obtain a comparison result; when the comparison result indicates that the deviation value between the effective value and the predetermined threshold exceeds the deviation threshold, it is determined that the circuit breaker is in a non-full-phase state, wherein the non-full-phase state indicates a state in which the three phases of the circuit breaker cannot be disconnected or closed at the same time.

[0113] According to another aspect of an embodiment of the present invention, a processor is further provided, and the processor is used to run a program, wherein when the program is run, any one of the above-mentioned methods for determining the phase state of a circuit breaker is executed.

[0114] According to another aspect of an embodiment of the present invention, a computer program product is further provided, comprising computer instructions, and when the computer instructions are executed by a processor, any one of the above-mentioned methods for determining the phase state of a circuit breaker is executed.

[0115] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0116] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0117] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0118] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0119] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0120] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0121] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for determining a phase state of a circuit breaker, characterized in that: include: Obtaining a load-side voltage of a circuit breaker, wherein the load-side voltage refers to a voltage on an electrical device side or a load side connected to the circuit breaker; Determine the phase voltages of the three phases in the circuit breaker according to the load side voltage, wherein the circuit breaker includes: phase A, phase B and phase C, and the phase voltages include: phase A voltage, phase B voltage and phase C voltage; Obtaining a line voltage between any two phases in the circuit breaker, wherein the line voltage includes: an AB line voltage, a BC line voltage, and a CA line voltage, wherein the AB line voltage is the voltage between the A phase and the B phase, the BC line voltage is the voltage between the B phase and the C phase, and the CA line voltage is the voltage between the C phase and the A phase; Selecting any one phase of the circuit breaker as a target phase, and determining the phase voltage of the target phase as a target phase voltage; Determine that the line voltage between the target phase and a first candidate phase is a first target line voltage, and determine that the line voltage between the first candidate phase and a second candidate phase is a second target line voltage, wherein, when the target phase is the A phase, the first candidate phase is the B phase, the second candidate phase is the C phase, the first target line voltage is the AB line voltage, and the second target line voltage is the BC line voltage; when the target phase is the B phase, the first candidate phase is the C phase, the second candidate phase is the A phase, the first target line voltage is the BC line voltage, and the second target line voltage is the CA line voltage; when the target phase is the C phase, the first candidate phase is the A phase, the second candidate phase is the B phase, the first target line voltage is the CA line voltage, and the second target line voltage is the AB line voltage; The phase state of the circuit breaker is determined according to the values ​​of the target phase voltage, the first target line voltage and the second target line voltage, wherein the phase state of the circuit breaker is determined according to the values ​​of the target phase voltage, the first target line voltage and the second target line voltage, including: when the target phase voltage, the first target line voltage and the second target line voltage are all zero, determining the phase state of the circuit breaker as a three-phase split, wherein the three-phase split indicates that the three phases of the circuit breaker are all in a split state; when the target phase voltage is a predetermined phase voltage and the first target line voltage and the second target line voltage are both zero, determining the phase state of the circuit breaker as a one-phase closed position and two-phase split, wherein the one-phase closed position and two-phase split indicates that one phase of the three phases of the circuit breaker is in a closed state and the other two phases are in the split state; when the target phase voltage is When the predetermined phase voltage and at least one of the first target line voltage and the second target line voltage is a half-value predetermined line voltage, or when the target phase voltage is a half-value predetermined phase voltage and the first target line voltage and the second target line voltage are different and both are not zero, the phase state of the circuit breaker is determined to be one-phase open and two-phase closed, the half-value predetermined line voltage is half of the predetermined line voltage, the half-value predetermined phase voltage is half of the predetermined phase voltage, and the one-phase open and two-phase closed position indicates that one of the three phases of the circuit breaker is in the open state and the other two phases are in the closed state; when the target phase voltage is the predetermined phase voltage, and the first target line voltage and the second target line voltage are both the predetermined line voltages, the phase state of the circuit breaker is determined to be three-phase closed, and the three-phase closed position indicates that the three phases of the circuit breaker are all in the closed state.

2. The method for determining the phase state of a circuit breaker according to claim 1, characterized in that: Obtain the load side voltage of the circuit breaker, including: Obtaining the load-side AC voltage of the circuit breaker; The load side AC voltage is stepped down by a voltage divider according to a predetermined ratio to obtain the load side voltage.

3. The method for determining the phase state of a circuit breaker according to claim 1, characterized in that: Determining the phase voltages of three phases in the circuit breaker according to the load side voltage includes: Using a live display to detect the load side voltage to obtain a phase voltage signal of each of the three phases of the circuit breaker; A converter is used to perform signal conversion on each of the phase voltage signals to obtain the corresponding phase voltage.

4. The method for determining the phase state of a circuit breaker according to claim 1, characterized in that: Obtaining the line voltage between any two phases in the circuit breaker includes at least one of the following: Directly detecting the line voltage in the circuit breaker using a voltage sensor; The corresponding line voltage is obtained by calculating the phase voltages of any two phases in the circuit breaker.

5. The method for determining the phase state of a circuit breaker according to claim 1, characterized in that: When the target phase voltage is the predetermined phase voltage and at least one of the first target line voltage and the second target line voltage is a half-value predetermined line voltage, or when the target phase voltage is a half-value predetermined phase voltage and the first target line voltage and the second target line voltage are different and both are not zero, determining that the phase state of the circuit breaker is a one-phase open position and two-phase closed position includes: When the target phase voltage is the predetermined phase voltage and the first target line voltage and the second target line voltage are both the half-value predetermined line voltages, determining the one-phase split and two-phase combined state is that the first candidate phase is in the split state and the target phase and the second candidate phase are both in the combined state; When the target phase voltage is the predetermined phase voltage, the first target line voltage is the predetermined line voltage, and the second target line voltage is the half-value predetermined line voltage, determining that the one-phase split and two-phase combined state is that the second candidate phase is in the split state and the target phase and the first candidate phase are both in the combined state; When the target phase voltage is the half-value predetermined phase voltage, the first target line voltage is the half-value predetermined line voltage, and the second target line voltage is the predetermined line voltage, the one-phase split and two-phase combined state is determined as the target phase is in the split state and the first candidate phase and the second candidate phase are both in the combined state.

6. The method for determining the phase state of a circuit breaker according to claim 1, characterized in that: Also includes: Acquiring a load-side AC voltage signal of the circuit breaker; When the two load-side AC voltage signals are obtained, the two load-side AC voltage signals are processed by a subtractor to obtain a voltage signal difference; In the case of obtaining one of the load-side AC voltage signals, determining the load-side AC voltage signal as the voltage signal difference; The effective value of the voltage signal difference is calculated by the transmitter according to a first formula, wherein the first formula is: , Y represents the effective value, y represents the voltage signal difference, and T represents the time period; Comparing the effective value with a predetermined threshold value by a comparator to obtain a comparison result; When the comparison result indicates that the deviation value between the effective value and the predetermined threshold exceeds the deviation threshold, it is determined that the circuit breaker is in a non-full-phase state, wherein the non-full-phase state indicates a state in which the three phases of the circuit breaker cannot be opened or closed at the same time.

7. A phase state determination device for a circuit breaker, characterized in that: include: A first acquisition unit, configured to acquire a load-side voltage of a circuit breaker, wherein the load-side voltage refers to a voltage on an electrical device side or a load side connected to the circuit breaker; a first determining unit, configured to determine the phase voltages of the three phases in the circuit breaker according to the load side voltage, wherein the circuit breaker includes: phase A, phase B and phase C, and the phase voltages include: phase A voltage, phase B voltage and phase C voltage; a second acquisition unit, configured to acquire a line voltage between any two phases of the circuit breaker, wherein the line voltage includes: an AB line voltage, a BC line voltage, and a CA line voltage, wherein the AB line voltage is the voltage between the A phase and the B phase, the BC line voltage is the voltage between the B phase and the C phase, and the CA line voltage is the voltage between the C phase and the A phase; a second determining unit, configured to select any one phase of the circuit breaker as a target phase, and determine the phase voltage of the target phase as a target phase voltage; a third determining unit, configured to determine that the line voltage between the target phase and the first candidate phase is the first target line voltage, and to determine that the line voltage between the first candidate phase and the second candidate phase is the second target line voltage, wherein, when the target phase is the A phase, the first candidate phase is the B phase, the second candidate phase is the C phase, the first target line voltage is the AB line voltage, and the second target line voltage is the BC line voltage; when the target phase is the B phase, the first candidate phase is the C phase, the second candidate phase is the A phase, the first target line voltage is the BC line voltage, and the second target line voltage is the CA line voltage; when the target phase is the C phase, the first candidate phase is the A phase, the second candidate phase is the B phase, the first target line voltage is the CA line voltage, and the second target line voltage is the AB line voltage; a fourth determining unit, configured to determine the phase state of the circuit breaker according to the values ​​of the target phase voltage, the first target line voltage, and the second target line voltage, wherein the fourth determining unit comprises: a first determining module, configured to determine that the phase state of the circuit breaker is a three-phase split when the target phase voltage, the first target line voltage, and the second target line voltage are all zero, and the three-phase split indicates that the three phases of the circuit breaker are all in a split state; a second determining module, configured to determine that the phase state of the circuit breaker is a one-phase closed position and two-phase split when the target phase voltage is a predetermined phase voltage and the first target line voltage and the second target line voltage are both zero, and the one-phase closed position and two-phase split indicates that one phase of the three phases of the circuit breaker is in a closed position and the other two phases are in the split state; a third determining module, configured to determine that the phase state of the circuit breaker is a one-phase closed position and two-phase split when the target phase voltage is the predetermined phase voltage and the first target line voltage and the second target line voltage are both zero. voltage and at least one of the first target line voltage and the second target line voltage is a half-value predetermined line voltage, or the target phase voltage is a half-value predetermined phase voltage and the first target line voltage and the second target line voltage are different and both are not zero, determining that the phase state of the circuit breaker is one-phase open and two-phase closed, the half-value predetermined line voltage is half of the predetermined line voltage, the half-value predetermined phase voltage is half of the predetermined phase voltage, the one-phase open and two-phase closed position indicates that one of the three phases of the circuit breaker is in the open state and the other two phases are in the closed state; a fourth determination module is used to determine that the phase state of the circuit breaker is three-phase closed when the target phase voltage is the predetermined phase voltage and the first target line voltage and the second target line voltage are both the predetermined line voltages, and the three-phase closed position indicates that the three phases of the circuit breaker are all in the closed state.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the phase state determination method of a circuit breaker according to any one of claims 1 to 6.

9. A computer program product comprising computer instructions, characterized in that When the computer instructions are executed by a processor, the method for determining the phase state of a circuit breaker according to any one of claims 1 to 6 is performed.

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