A phase-advancer identification system

Abstract

The application discloses a phase identifier system. The system comprises a voltage transformer, a three-phase live display, a three-phase phase identifier, a three-phase indicator lamp and a central processing unit. The three-phase live display is electrically connected with the three-phase conductor through the voltage transformer, and the three-phase live display is electrically connected with the three-phase indicator lamp in series. The three-phase live display is also electrically connected with the three-phase phase identifier. The voltage transformer detects the voltage of the three-phase conductor and converts the voltage into a low-voltage electric signal. The three-phase live display identifies the live state on the three-phase conductor according to the low-voltage electric signal. The three-phase indicator lamp indicates according to the live state. The three-phase phase identifier identifies the voltage of any two-phase conductor on the three-phase conductor. The three-phase phase identifier further comprises a photosensitive sheet. The photosensitive sheet senses the indication state of the three-phase indicator lamp. The central processing unit judges the opening and closing state of the three-phase switch according to the voltage of any two-phase conductor identified by the three-phase phase identifier and the indication state of the three-phase indicator lamp sensed by the photosensitive sheet.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to three-phase conductor voltage technology, and particularly to a phase identifier identification system. BACKGROUND

[0002] 10kV switch cabinet is a common device in power system, which has the advantages of small size, simple maintenance and convenient operation. In the process of power generation, power transmission and power distribution in power system, the switch cabinet can open, control and protect the electrical equipment. The live display device is an important device of the switch cabinet, which mainly consists of a live display and a voltage sensor. The live display is generally installed on the low-voltage chamber door of the switch cabinet, and the three-phase (A, B, C three-phase) voltage sensor is generally installed on the three-phase high-voltage conductor. The voltage sensor transmits the signal of whether the high-voltage conductor is live to the live display, and through the indicator light of the live display, the live condition of the three-phase high-voltage conductor can be monitored in real time, which can prevent external electrical misoperation and ensure personal safety.

[0003] Generally, there are four situations of 10kV switch, a, when three-phase closing, the three-phase conductor voltage to ground is normal, and the line-to-line voltage between the three-phase conductors is normal; b, when three-phase opening, the three-phase conductor voltage to ground is 0, and the line-to-line voltage between the three-phase conductors is 0; c, when single-phase closing and two-phase opening, the three-phase conductor voltage to ground is normal, and the line-to-line voltage between the three-phase conductors is 0; d, when single-phase opening and two-phase closing, the three-phase conductor voltage to ground is normal, and only the line-to-line voltage between two phases is line voltage. At present, in the prior art, only the voltage transformer can be used to monitor whether the three-phase voltage to ground is normal, but it cannot detect the phase-to-phase voltage, so it cannot comprehensively identify the closing and opening conditions of the switch on the power side of the three-phase conductor. SUMMARY

[0004] The present application provides a phase identifier identification system, which can detect the phase-to-phase voltage through the phase identifier, and comprehensively identify the conditions of the switch on the power side of the three-phase conductor.

[0005] The present application provides a phase identifier identification system, which comprises a voltage transformer, a three-phase live display, a three-phase phase identifier, a three-phase indicator light and a central processing unit; the three-phase live display is electrically connected with the three-phase conductor through the voltage transformer, and the three-phase live display is electrically connected in series with the three-phase indicator light; the three-phase live display is also electrically connected with the three-phase phase identifier;

[0006] The voltage transformer is used to detect the three-phase conductor voltage and convert the three-phase conductor voltage into a low-voltage electrical signal;

[0007] The three-phase live display is used to identify the live state on the three-phase conductor according to the low-voltage electrical signal detected by the voltage transformer;

[0008] The three-phase indicator is used for indicating the live state of the live display;

[0009] The three-phase phase identifier is used for identifying the voltage of any two-phase conductor on the three-phase conductor;

[0010] The three-phase phase identifier further comprises a photosensitive sheet; the photosensitive sheet is used for sensing the indication state of the three-phase indicator;

[0011] The central processor is electrically connected with the three-phase phase identifier, and is used for judging the opening and closing state of the switch on the power side of the three-phase conductor according to the voltage of any two-phase conductor identified by the three-phase phase identifier and the indication state of the three-phase indicator sensed by the photosensitive sheet.

[0012] Optionally, the central processor is further used for judging the fault state of the three-phase indicator according to the indication state of the three-phase indicator sensed by the photosensitive sheet and the voltage of any two-phase conductor identified by the three-phase identifier.

[0013] Optionally, the central processor is further used for judging the fault state of the three-phase indicator according to the indication state of the three-phase indicator sensed by the photosensitive sheet and the voltage of any two-phase conductor identified by the three-phase identifier, and specifically comprises:

[0014] When the voltage of any two-phase conductor identified by the three-phase identifier is line voltage, and the photosensitive sheet senses that the three-phase indicator is bright, it is judged that the three-phase indicator emits light normally;

[0015] When the voltage of any two-phase conductor identified by the three-phase phase identifier is line voltage, and the photosensitive sheet senses that the three-phase indicator is not bright, it is judged that the three-phase indicator has a fault.

[0016] Optionally, it further comprises an alarm unit and an LED indicator;

[0017] The alarm unit is used for outputting an alarm signal when the three-phase indicator has a fault;

[0018] The LED indicator is used for starting to work when the alarm unit outputs the alarm signal.

[0019] Optionally, the central processor is used for judging the opening and closing state of the three-phase switch on the power side of the three-phase conductor according to the voltage value of any two-phase conductor identified by the three-phase phase identifier and the indication state of the three-phase indicator sensed by the photosensitive sheet, and specifically comprises:

[0020] When the voltage value of at least one two-phase conductor identified by the three-phase phase identifier is line voltage, it is judged that the three-phase switch is normally closed or that the three-phase switch is single-phase opened.

[0021] Optionally, the central processor is configured to determine the on-off state of the three-phase switch on the power side of the three-phase conductor according to the voltage value of any two phases identified by the three-phase phase identifier and the indication state of the three-phase indicator sensed by the photosensitive sheet, and specifically further comprises:

[0022] When the voltage between any two phases identified by the three-phase phase identifier is 0, and the photosensitive sheet senses that the three-phase indicator is on, it is determined that the single-phase of the three-phase switch cannot be tripped.

[0023] Optionally, the central processor is configured to determine the on-off state of the three-phase switch on the power side of the three-phase conductor according to the voltage value of any two phases identified by the three-phase phase identifier and the indication state of the three-phase indicator sensed by the photosensitive sheet, and specifically further comprises:

[0024] When the voltage of any two phases identified by the three-phase phase identifier is 0, and the photosensitive sheet senses that the three-phase indicator is off, it is determined that the three-phase of the three-phase switch is tripped.

[0025] Optionally, the phase identifier comprises a rectifier bridge and a voltage comparator.

[0026] The rectifier bridge is configured to rectify the voltage value of any two phases into a direct current voltage.

[0027] The voltage comparator is configured to output the phase voltage value according to the direct current voltage and a voltage output threshold.

[0028] Optionally, the voltage transformer comprises a first capacitor C1, and the live display comprises a second capacitor C2.

[0029] The capacitance of the second capacitor C2 and the capacitance of the first capacitor C1 satisfy: C1 / C1+C2 approaches 1.

[0030] Optionally, the photosensitive sheet comprises a semiconductor material.

[0031] The embodiment of the present application detects three-phase conductor voltage through a voltage transformer, and converts the three-phase conductor voltage into a low-voltage electric signal; a three-phase live display identifies the live state on the three-phase conductor according to the low-voltage electric signal detected by the voltage transformer; the three-phase indicator light indicates according to the live state of the live display; the three-phase phase identifier identifies the voltage between any two phases of the three-phase conductor; wherein the three-phase phase identifier further comprises a photosensitive sheet; the photosensitive sheet is used for sensing the indication state of the three-phase indicator light; the central controller judges the opening and closing state of the three-phase switch on the power supply side of the three-phase conductor according to the voltage of any two phases identified by the three-phase phase identifier and the indication state of the three-phase indicator light sensed by the photosensitive sheet, so that the present application realizes the effect of comprehensively identifying the opening and closing state of the three-phase switch through the phase identifier detecting the phase-to-phase voltage. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 FIG. 1 is a structural schematic diagram of a phase identifier recognition system provided by the embodiment of the present application;

[0033] Figure 2 FIG. 2 is a structural schematic diagram of a phase identifier recognition system provided by the embodiment of the present application. DETAILED DESCRIPTION

[0034] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0035] Figure 1is a structural schematic view of a phase identifier recognition system provided by an embodiment of the present application, and the phase identifier system comprises a voltage transformer 10, a three-phase live display 20, a three-phase indicator lamp 30, a three-phase phase identifier 40 and a central processing unit 50; the three-phase live display 20 is electrically connected with the three-phase conductors A, B and C through the voltage transformer 10, and the three-phase live display 20 is electrically connected with the three-phase indicator lamp 30 in series; the three-phase live display 20 is also electrically connected with the three-phase phase identifier 40; the voltage transformer 10 is used for detecting the three-phase conductor voltage and converting the three-phase conductor voltage into a low-voltage electric signal; the three-phase live display 20 is used for recognizing the live state on the three-phase conductor according to the low-voltage electric signal detected by the voltage transformer 10; the three-phase indicator lamp 30 is used for indicating according to the live state of the live display 20; the three-phase phase identifier 40 is used for recognizing the voltage of any two-phase conductors on the three-phase conductor; the three-phase phase identifier 40 further comprises a photosensitive sheet 41; the photosensitive sheet 41 is used for sensing the indication state of the three-phase indicator lamp 30; and the central processing unit 50 is used for judging the opening and closing state of the three-phase switch on the power supply side of the three-phase conductor according to the voltage of any two-phase conductors recognized by the three-phase phase identifier 30 and the indication state of the three-phase indicator lamp 30 sensed by the photosensitive sheet 41.

[0036] Among them, there are four cases of 10kV three-phase switch, a, when the three-phase is closed, the three-phase conductor voltage to ground is normal, and the phase-to-phase voltage between the three-phase conductors is normal; b, when the three-phase is opened, the three-phase conductor voltage to ground is 0, and the phase-to-phase voltage between the three-phase conductors is 0; c, when the single-phase is closed and the two-phase is opened, the three-phase conductor voltage to ground is normal, and the phase-to-phase voltage between the three-phase conductors is 0. d, when the single-phase is opened and the two-phase is closed, the three-phase conductor voltage to ground is normal, and only the line-to-line voltage between the two-phase conductors is line voltage. At present, the prior art can only monitor whether the three-phase voltage to ground is normal through the voltage transformer, and cannot detect the phase-to-phase voltage, so it is impossible to comprehensively identify the closing and opening conditions of the three-phase switch.

[0037] The present scheme detects the three-phase conductor voltage through the voltage transformer 10, and converts the three-phase conductor voltage into a low-voltage electric signal; the three-phase live display 20 recognizes the live state on the three-phase conductor according to the low-voltage electric signal detected by the voltage transformer 10; the three-phase indicator lamp 30 indicates according to the live state of the live display 20; the three-phase phase identifier 40 is used for recognizing the voltage of any two-phase conductors on the three-phase conductor; the three-phase phase identifier 40 further comprises a photosensitive sheet 41; the photosensitive sheet 41 is used for sensing the indication state of the three-phase indicator lamp 30; and the central processing unit 50 judges the opening and closing state of the three-phase switch according to the voltage value of any two-phase conductors recognized by the three-phase phase identifier 30 and the indication state of the three-phase indicator lamp sensed by the photosensitive sheet 41. Thus, the present scheme detects the phase-to-phase voltage through the phase identifier, and achieves the effect of comprehensively identifying the closing and opening conditions of the three-phase switch.

[0038] Specifically, the on-off of the three-phase switch is divided into four cases: when the three-phase switch is all on, the voltage transformer 10 detects that the three-phase conductor voltage is high, the voltage transformer 10 can convert the high three-phase conductor voltage signal into a low voltage electrical signal; the three-phase live display 20 recognizes that the three-phase conductor is live, the three-phase indicator light 30 is on, the sensing sheet 41 senses that the three-phase indicator light 30 is on; at this time, the three-phase phase identifier 40 identifies that the voltage of any two-phase conductor on the three-phase conductor is line voltage; when the three-phase switch is all off, the voltage transformer 10 detects that the three-phase conductor voltage is 0, the three-phase live display 20 recognizes that the three-phase conductor is not live, the three-phase indicator light 30 is not on, the sensing sheet 41 senses that the three-phase indicator light is not on; at this time, the three-phase phase identifier 40 identifies that the voltage value of any two-phase conductor on the three-phase conductor is 0; when the three-phase switch is single-phase on and two-phase off, the voltage transformer 10 detects that the three-phase conductor voltage is high, the three-phase live display 20 recognizes that the three-phase conductor is live, the three-phase indicator light 30 is on, the sensing sheet 41 senses that the three-phase indicator light 30 is on; at this time, the three-phase phase identifier 40 identifies that the voltage value of any two-phase conductor on the three-phase conductor is 0; when the three-phase switch is single-phase off and two-phase on, the voltage transformer 10 detects that the three-phase conductor voltage is high, the three-phase live display 20 recognizes that the three-phase conductor is live, the three-phase indicator light 30 is on, the sensing sheet 41 senses that the three-phase indicator light 30 is on; at this time, the three-phase phase identifier 40 identifies that the voltage value of at least one two-phase conductor on the three-phase conductor is line voltage, so the central processor judges that the three-phase switch is normally on or judges that the three-phase switch is single-phase off. When the voltage value of any two-phase conductor identified by the three-phase phase identifier 40 is 0, and the photosensitive sheet senses that the three-phase indicator light is on, it is judged that the three-phase conductor cannot be single-phase off. When the voltage value of any two-phase identified by the three-phase phase identifier is 0, and the photosensitive sheet senses that the three-phase indicator light is not on, it is judged that the three-phase switch is three-phase off.

[0039] Optionally, Figure 2 is another phase identifier system structure diagram provided by the embodiment of the application, as Figure 2 shown, the phase identifier system further includes: an alarm unit 60 and an LED indicator light 70; the alarm unit 60 is used for outputting an alarm signal when the three-phase indicator light fails; the LED indicator light 70 is used for starting to work when the alarm unit outputs the alarm signal.

[0040] It should be explained here that the central processor 50 is also used to determine the fault state of the three-phase indicator light according to the indication state of the three-phase indicator light 30 sensed by the photosensitive sheet 41 and the voltage value of the arbitrary two-phase conductor identified by the three-phase identifier 40. Specifically, when the voltage of the at least one two-phase conductor identified by the three-phase identifier 40 is a line voltage, if the photosensitive sheet 41 senses that the three-phase indicator light 30 is bright, it is determined that the three-phase indicator light 30 emits light normally; when the voltage of the at least one two-phase conductor identified by the three-phase identifier 40 is a line voltage, if the photosensitive sheet 41 senses that the three-phase indicator light is not bright at this time, it is determined that the three-phase indicator light 30 is faulty. When the three-phase indicator light 30 is faulty, the alarm unit 60 outputs an alarm signal, and the LED indicator light 70 starts to work, which avoids that the three-phase indicator light 30 cannot normally indicate when it is faulty, and the operating personnel do not realize that the indicator light is faulty in time, which easily leads to that the operating personnel access external equipment in the case that the three-phase conductor is live.

[0041] Optionally, as shown in Figure 2 , the phase identifier 40 includes a rectifier bridge and a voltage comparator; the rectifier bridge is used to rectify the voltage value of the identified arbitrary two-phase into a direct current voltage; and the voltage comparator is used to output the phase voltage value according to the direct current voltage and a voltage output threshold value.

[0042] In actual power grid operation, the phase identifier 40 will output the phase voltage value caused by external waves due to the influence of external waves; the voltage comparator can filter the phase voltage value output under the influence of external waves, that is, directly output the phase voltage value greater than the voltage output threshold value, thereby increasing the reliability of the phase identifier 40 in identifying the phase voltage value.

[0043] Optionally, as shown in Figure 2 , the voltage transformer 10 includes a first capacitor C1; and the live display 20 includes a second capacitor C2; the capacitance value of the second capacitor C2 and the capacitance value of the first capacitor C1 satisfy: C1 / C1+C2 approaches 1.

[0044] Since the voltage transformer 10 and the three-phase live display 20 are connected in series, according to the capacitor voltage division principle, when the voltage division of the first capacitor C1 in the voltage transformer 10 is much greater than the voltage division value of the second capacitor C2 in the live display 20, the voltage across the three-phase live display 20 is ensured to be a small value, thereby ensuring that the three-phase indicator light 30 can work under a safe voltage.

[0045] Optionally, as shown in Figure 2As shown, the photosensitive sheet 41 comprises a semiconductor material. The photosensitive sheet 41 comprises a high photosensitivity semiconductor material, which can convert the light signal monitored from the three-phase indicator light into an electric signal according to the photoelectric effect, and feed back the electric signal to the central processor 50, so that the central processor 50 determines the indication state of the three-phase indicator light 30 sensed by the photosensitive sheet 41.

[0046] It should be noted that the above only describes the preferred embodiments of the present application and the principles of the applied technology. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A phase detector identification system, characterized in that, It includes a voltage transformer, a three-phase live display, a three-phase phase identifier, three-phase indicator lights, and a central processing unit; the three-phase live display is electrically connected to the three-phase conductors through the voltage transformer, and the three-phase live display is connected in series with the three-phase indicator lights; the three-phase live display is also electrically connected to the three-phase phase identifier. The voltage transformer is used to detect the voltage of the three-phase conductors and convert the voltage of the three-phase conductors into a low-voltage electrical signal; The three-phase energized display is used to identify the energized state of the three-phase conductors based on the low-voltage electrical signal detected by the voltage transformer. The three-phase indicator light is used to indicate the energized status of the energized display. The three-phase phase identifier is used to identify the voltage of any two phase conductors on the three-phase conductor; The three-phase phase identifier also includes a photosensitive film; the photosensitive film is used to sense the indication status of the three-phase indicator lights; The central processing unit is electrically connected to the three-phase phase identifier and is used to determine the open / closed state of the three-phase switch on the power supply side of the three-phase conductor based on the voltage of any two phase conductors identified by the three-phase phase identifier and the indication state of the three-phase indicator light sensed by the photosensitive film; the step of determining the open / closed state of the three-phase switch on the power supply side of the three-phase conductor based on the voltage of any two phase conductors identified by the three-phase phase identifier and the indication state of the three-phase indicator light sensed by the photosensitive film includes: If the three-phase phase identifier detects that the voltage of at least two phase conductors is line voltage, it is determined that the three-phase switch is normally closed or that a single phase of the three-phase switch is open; if the voltage of any two phase conductors detected by the three-phase phase identifier is 0, and the photosensitive film detects that the three-phase indicator light is on, it is determined that a single phase of the three-phase switch cannot be opened; if the voltage of any two phase conductors detected by the three-phase phase identifier is 0, and the photosensitive film detects that the three-phase indicator light is not on, it is determined that a single phase of the three-phase switch is open. The central processing unit is also used to determine the fault status of the three-phase indicator light based on the indication status of the three-phase indicator light sensed by the photosensitive film and the voltage of any two phase conductors identified by the three-phase phase identifier. The central processing unit is further configured to determine the fault status of the three-phase indicator lights based on the indication status of the three-phase indicator lights sensed by the photosensitive film and the voltage of any two phase conductors identified by the three-phase phase identifier, specifically including: When the voltage of any two phase conductors identified by the three-phase phase identifier is the line voltage, and the photosensitive film detects that the three-phase indicator light is lit, it is determined that the three-phase indicator light is illuminating normally. When the voltage of any two phase conductors identified by the three-phase phase identifier is the line voltage, and the photosensitive film detects that the three-phase indicator light is not lit, it is determined that the three-phase indicator light has malfunctioned.

2. The phase detector identification system according to claim 1, characterized in that, Also includes: Alarm unit and LED indicator lights; The alarm unit is used to output an alarm signal when the three-phase indicator light malfunctions; The LED indicator light is used to activate the alarm unit when it outputs an alarm signal.

3. The phase detector identification system according to claim 1, characterized in that, The phase identifier includes a rectifier bridge and a voltage comparator; The rectifier bridge is used to rectify the voltage values ​​of any two phases into a DC voltage. The voltage comparator is used to output a phase voltage value based on the DC voltage and the voltage output threshold.

4. The phase detector identification system according to claim 1, characterized in that, The voltage transformer includes a first capacitor C1; the energized display includes a second capacitor C2; The capacitance of the second capacitor C2 and the capacitance of the first capacitor C1 satisfy the condition that C1 / C1+C2 approaches 1.

5. The phase detector identification system according to claim 1, characterized in that, The photosensitive film includes semiconductor materials.

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