A high-voltage dual-power supply line phase-loss rapid detection device for a power distribution room

Abstract

The utility model relates to a kind of high-voltage dual-power supply line phase-loss quick detection device of distribution room, including low-voltage distribution cabinet, three-phase phase-loss detection device, control circuit, DCS control system, alarm device, low-voltage distribution room is powered by two transformers, and each transformer is powered by different high-voltage line respectively, wherein a set of three-phase phase-loss detection device is installed in each transformer output to low-voltage distribution cabinet with fault switch output signal, connected to DCS control system by circuit, switch signal is connected alarm device after receiving switch alarm signal by DCS control system inside, alarm by main control room personnel to contact electrician to investigate reason to eliminate fault or stop equipment operation in the first time when phase-loss is found.The utility model aims at providing a kind of simple, quick detection power supply system phase-loss fault device, avoid the situation that equipment is damaged by phase-loss occurs, ensure that production system is safely and stably operated.

Description

Technical Field

[0001] This utility model relates to the field of power system protection technology, specifically a rapid phase loss detection device for high-voltage dual-power supply lines in power distribution rooms. This device is particularly suitable for power distribution systems in industries such as chemical, metallurgical, and power, enabling real-time monitoring of phase loss faults in dual-power supply systems and timely alarm issuance to prevent equipment damage and production accidents caused by phase loss. Background Technology

[0002] In existing industrial power supply systems, critical low-voltage distribution rooms typically employ a dual-transformer split power supply mode to improve power supply reliability. However, traditional high-voltage distribution systems have the following technical drawbacks: Traditional power supply methods rely on the high-voltage distribution room supplying the transformer, which then monitors the three-phase current and grounding status via the high-voltage distribution cabinet at the high-voltage station. Personnel cannot monitor all high-voltage output lines in real time. Low-voltage power consumption is checked by electricians during shift inspections, but there are no devices for real-time detection of low-voltage phase loss. Delayed detection of low-voltage phase loss in the production system can easily lead to the burnout of motors, computers, frequency converters, and other electrical equipment, causing abnormal shutdowns and hindering the safe and stable operation of the production system. Utility Model Content

[0003] To address the aforementioned issues, this invention provides a simple and rapid device for detecting phase loss faults in power supply systems, thereby preventing equipment damage caused by phase loss and ensuring the safe and stable operation of production systems.

[0004] The technical solution of this utility model is implemented as follows: A rapid phase loss detection device for a high-voltage dual-power supply line in a power distribution room includes two transformers, each powered by a different high-voltage power supply line; the output terminals of the two transformers are connected to a low-voltage distribution cabinet, and each transformer's main line to the low-voltage distribution cabinet is equipped with a three-phase phase loss detection device to detect whether the line is missing a phase in real time and output a fault switch signal; the three-phase phase loss detection device is connected to a DCS control system through a control line, and the DCS control system is connected to an alarm device; Preferably, the three-phase phase loss detection device adopts a passive point switch signal output method; Preferably, the three-phase phase loss detection device is equipped with a voltage sensor; Preferably, after receiving a phase loss signal, the DCS control system automatically records the fault information and triggers the alarm device; Preferably, the alarm device includes at least one of an audible and visual alarm and a main control room monitoring system linkage alarm module; Preferably, the control circuit uses shielded cable or optical fiber transmission.

[0005] The beneficial effects of this utility model are: by adding low-voltage phase loss detection and connecting it to the DCS control system, this utility model can immediately trigger an alarm after a phase loss. The low-voltage electrician can detect the low voltage and, if it is confirmed that the high-voltage phase loss is the cause, promptly contact the relevant person in charge to shut down the system to investigate the high-voltage fault, thus avoiding the situation where prolonged phase loss causes equipment damage and forces the system to shut down. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of this utility model.

[0007] Parts Description: 1. Low-voltage distribution cabinet, 2. Three-phase phase loss detection device, 3. Control circuit, 4. DCS control system, 5. Alarm device, 6. Electrical equipment. Detailed Implementation

[0008] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0009] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0010] See attached document Figure 1 A rapid phase loss detection device for a high-voltage dual-power supply line in a power distribution room includes a low-voltage distribution cabinet 1, a three-phase phase loss detection device 2, a control line 3, a DCS control system 4, and an alarm device 5. The low-voltage distribution room is powered by two transformers, each powered by a different high-voltage line. A three-phase phase loss detection device 2 with a fault switch output signal is installed in the low-voltage distribution cabinet at the output of each transformer. It is connected to the DCS control system 4 through the control line 3. After receiving the switch alarm signal, the DCS control system 4 outputs a switch signal to connect to the alarm device 5. When a phase loss is detected, an alarm is triggered immediately, and the personnel in the main control room contact an electrician to investigate the cause, eliminate the fault, or stop the equipment operation.

[0011] The three-phase phase loss detection device 2 adopts a passive point switch signal output method; the three-phase phase loss detection device 2 is equipped with a high-precision voltage sensor; after receiving the phase loss signal, the DCS control system 4 automatically records the fault information and triggers the alarm device 5. The alarm device 5 adopts an audible and visual alarm, and the control line 3 adopts fiber optic transmission or shielded cable.

[0012] A three-phase phase loss detection device 2 is installed in each of the low-voltage side distribution cabinets of the two transformers. When any one of them has a phase loss, the signal is transmitted to the DCS control system 4 through a passive switch. The control system then controls the alarm device 5 to sound an alarm, thus reminding the main control personnel to contact the electrician in time to investigate the cause of the fault.

[0013] Finally, it should be noted that the above examples are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above examples, those skilled in the art should understand that various changes or adjustments can be made to the above embodiments in detail and form without departing from the spirit and scope of this utility model, without deviating from the scope defined by the claims of this utility model.

Claims

1. A rapid phase loss detection device for a high-voltage dual-power supply line in a power distribution room, comprising two transformers, each powered by a different high-voltage power supply line; the output terminals of the two transformers are connected to a low-voltage distribution cabinet (1), characterized in that... Each transformer output to the low-voltage distribution cabinet (1) is equipped with a three-phase phase loss detection device (2) to detect whether the line is missing a phase in real time and output a fault switch signal; the three-phase phase loss detection device (2) is connected to the DCS control system (4) through the control line (3), and the DCS control system (4) is connected to the alarm device (5).

2. The rapid phase loss detection device for a high-voltage dual-power supply line in a power distribution room as described in claim 1, characterized in that... The three-phase phase loss detection device (2) adopts a passive point switch signal output method.

3. A rapid phase loss detection device for a high-voltage dual-power supply line in a power distribution room as described in claim 1 or 2, characterized in that... The three-phase phase loss detection device (2) is equipped with a voltage sensor.

4. A rapid phase loss detection device for a high-voltage dual-power supply line in a power distribution room as described in claim 1 or 2, characterized in that... After receiving a phase loss signal, the DCS control system (4) automatically records the fault information and triggers the alarm device (5).

5. A rapid phase loss detection device for a high-voltage dual-power supply line in a power distribution room as described in claim 1 or 2, characterized in that... The alarm device (5) includes at least one of an audible and visual alarm and a main control room monitoring system linkage alarm module.

6. A rapid phase loss detection device for a high-voltage dual-power supply line in a power distribution room according to claim 1 or 2, characterized in that... The control line (3) is transmitted using shielded cable or optical fiber.

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