CN210377748U - Electrical fire monitoring system based on harmonic suppression - Google Patents

Abstract

The utility model discloses an electric fire monitored control system based on harmonic suppression, including system's power, three-phase four-wire system power load, electric harmonic suppression unit, full parameter monitoring detector, host computer, monitoring host. The electric harmonic suppression unit is connected between a system power supply and a three-phase four-wire system electric load and is connected with an upper computer; the load current transformer is connected between the electric harmonic suppression unit and the three-phase four-wire system electric load in a penetrating manner, and the output end of the load current transformer is connected to the electric harmonic suppression unit; the full-parameter monitoring detector is connected to the electric harmonic suppression unit through a 485 communication port and a start-stop interface, is connected to the monitoring host through an alarm communication linkage interface, and is connected to the residual current sensor, the temperature detection sensor, the system voltage transformer and the system current sensor through sampling ports. The utility model discloses can follow the emergence probability that early warning and two aspects of suppression effectively reduce electric fire before the calamity.

Description

Electrical fire monitoring system based on harmonic suppression

Technical Field

The utility model relates to an electric fire monitored control system based on harmonic restraines especially relates to a full parameter electric fire monitored control system to the detection of one of electric fire potential safety hazard and suppression.

Background

Along with the continuous improvement of the living standard of people, the popularization of household appliances reaches unprecedented level, the electrical fire hazard is also increased sharply along with the multiple increase of the electricity consumption of urban residents, and the electrical fire hazard gradually becomes a leading role in various fires from the eighties of the last century. Comprehensive data statistics show that the electric fire accidents always occupy the first position of the whole fire accidents, account for more than 30 percent of the total number of the accidents, and have a tendency of increasing the occupied proportion, so that the loss caused by the electric fire is particularly disastrous. According to statistical analysis, the causes of various electrical fires mainly include overload, local overheat, insulation aging, spark discharge, heating of electrical appliances, overvoltage or undervoltage, nonlinear load and the like. The phenomena of overload, local overheating, insulation aging, discharge spark, heating of electrical appliances, overvoltage or undervoltage and the like can be effectively controlled by the current management and regulation and technical standards, but the monitoring and the inhibition of harmonic current generated by nonlinear load are not effectively controlled. The existence of harmonic waves can cause neutral current overload; resonance is formed with a system, overvoltage is generated, and the insulation aging of the cable is accelerated; the skin effect and the proximity effect cause the over-high temperature rise of the cable; electromagnetic radiation and interference generated by higher harmonics are increased; the power factor is reduced, and the system current is increased, so that the heating is intensified; electromagnetic losses and eddy current losses increase; as a result of the temperature rise during charging of the battery, electrical fire is induced in many ways. Therefore, the electrical harmonic is mainly the root of an electrical fire, and the detection and suppression of the electrical harmonic are of great significance in the field of electrical fire monitoring from the aspect of electrical harmonic early warning and suppression to radically reduce the potential hazards of the electrical fire.

The electrical fire monitoring system based on harmonic suppression calculates the electrical harmonic content of a load circuit by carrying out technical analysis on the sampled data of the load current of the system, and gives an overproof early warning according to the fixed value of the electrical harmonic content. By adopting the modern power electronic device, the harmonic waves with the quantity opposite to the load phase are inverted and offset, the electric harmonic waves of the system are restrained, and the potential safety hazard of electric fire caused by the existence of the electric harmonic waves is reduced. The circuit overheating caused by the proximity effect of harmonic current is reduced by inhibiting the harmonic, the insulation aging of the cable is slowed down, the temperature rise of the cable is reduced, and the danger of system resonance and the occurrence probability of equipment misoperation are reduced. By utilizing the technical means of electrical harmonic detection and suppression, the fire hazard of the electrical fire is predicted and prevented in advance, and the occurrence probability of the electrical fire is reduced.

An electrical fire monitoring system based on harmonic suppression is one of important means for reducing the potential safety hazards of electrical fires, and the electrical fire monitoring system suppresses the occurrence of fires before the fires occur and prevents the fires from happening in the future; the system has a full-parameter data analysis function, sampling analysis is carried out on residual current, cable temperature, system voltage and system current in the system, electric quantity mutation of an electric fire can be caused, and a certain early warning effect can be achieved.

Disclosure of Invention

The utility model aims to reduce because of there is the electric fire hidden danger that electric harmonic causes in the power consumption load, play early warning and inhibitory action to the electric harmonic that exists in the power consumption load, it is overheated to have reduced the circuit that the effect of closing on of harmonic current caused through restraining the harmonic, has slowed down cable insulation ageing, has reduced the cable temperature rise, has reduced the danger of system resonance and the emergence probability of equipment malfunction, and fundamentally reduces electric fire hidden danger.

The utility model provides a technical scheme that its technical problem adopted is:

the electrical fire monitoring system based on harmonic suppression comprises a system power supply, a three-phase four-wire system electrical load, an electrical harmonic suppression unit, a full-parameter monitoring detector, an upper computer and a monitoring host. The method is characterized in that:

an electric harmonic suppression unit is connected in parallel between a system power supply and a three-phase four-wire system electric load and is connected to an upper computer through an upper computer interface; load current transformers CTa, CTb and CTc are connected between the electric harmonic suppression unit and the three-phase four-wire electric load in a penetrating manner, and the output ends of the load current transformers are connected to a load current sampling interface of the electric harmonic suppression unit; the full-parameter monitoring detector is connected to the 485 communication port and the start-stop interface of the electrical harmonic suppression unit through the 485 communication port and the start-stop interface;

the electrical harmonic suppression unit of the electrical fire monitoring system based on harmonic suppression comprises a system power supply interface A, B, C, N, an active inversion and current transformation main body module, a load current sampling interface, a 485 communication interface, a start-stop interface and an upper computer interface; the method is characterized in that:

the electric harmonic suppression unit is connected with a system power supply through a system power supply interface A, B, C, N; the active inversion current transformation main body module is connected to a system power interface A, B, C, N through an internal wiring of the electric harmonic suppression unit; a load current sampling port of the electric harmonic suppression unit is connected to the output end of the load current transformer; the 485 communication interface of the electric harmonic suppression unit is connected to the 485 communication interface of the full-parameter monitoring detector; the start-stop interface of the electrical harmonic suppression unit is connected to the start-stop interface of the full-parameter monitoring detector; an upper computer interface of the electric harmonic suppression unit is connected to an upper computer;

the full-parameter monitoring detector of the electrical fire monitoring system based on harmonic suppression comprises a 485 communication port, a start-stop interface, a residual current sampling port, a temperature sampling port, a system voltage sampling port, a system current sampling port and an alarm communication linkage port; the method is characterized in that:

the full-parameter monitoring detector is connected to the 485 communication port and the start-stop interface of the electrical harmonic suppression unit through the 485 communication port and the start-stop interface; the full-parameter monitoring detector is connected to the monitoring host through an alarm communication linkage interface; the full-parameter monitoring detector is connected to the output ends of the residual current sensor, the temperature detection sensor, the system voltage transformer and the system current sensor through the residual current sampling port, the temperature sampling port, the system voltage sampling port and the system current sampling port.

The utility model discloses the beneficial effect who has is:

the utility model discloses an electric fire monitoring system based on harmonic suppression, have the function of early warning electric fire, restrain the electric harmonic in the electric load, early warning from the function, the hidden danger of suggestion electric fire is important; fundamentally inhibiting, reducing the temperature rise of the cable, slowing down the insulation aging, and eliminating the key hidden dangers of electrical fire such as system resonance and the like.

Drawings

FIG. 1: a main circuit diagram of an electrical fire monitoring system based on harmonic suppression.

In the figure: 1. a system power supply; 2. load current transformers CTa, CTb, CTc; 3. three-phase four-wire system electrical load; 4. an electric harmonic suppression unit; 5. an upper computer; 6. a full parameter monitoring detector; 7. a residual current sensor; 8. a temperature detection sensor; 9. a system voltage transformer; 10. a system current sensor; 11. monitoring host

Detailed Description

The invention will be described in further detail with reference to the following drawings and specific embodiments: this embodiment is implemented on the premise of the technical solution of the present invention, and an implementation manner and an operation process are given, but the scope of the present invention is not limited to the following embodiments.

Fig. 1 is the utility model provides an electric fire monitored control system structure block diagram based on harmonic suppression, and the package includes system power (1), three-phase four-wire system power load (3), electric harmonic suppression unit (4), full parameter monitoring detector (6), host computer (5), monitoring host computer (11).

In the embodiment, an electric harmonic suppression unit (4) is connected in parallel between a system power supply (1) and a three-phase four-wire system electric load (3), and the electric harmonic suppression unit (4) is connected to an upper computer (5) through an upper computer interface; a load current transformer (2) is connected between the electric harmonic suppression unit (4) and the three-phase four-wire system electric load (3) in a penetrating manner, and the output end of the load current transformer (2) is connected to a load current sampling interface of the electric harmonic suppression unit (4); the full-parameter monitoring detector (6) is connected with the 485 communication port and the start-stop interface of the electrical harmonic suppression unit (4) through the 485 communication port and the start-stop interface.

The electrical harmonic suppression unit of the electrical fire monitoring system based on harmonic suppression comprises a system power supply interface A, B, C, N, an active inversion and current transformation main body module, a load current sampling interface, a 485 communication interface, a start-stop interface and an upper computer interface (5).

Claims (3)

1. The utility model provides an electric fire monitored control system based on harmonic suppression, includes system power (1), three-phase four-wire system power load (3), electric harmonic suppression unit (4), full parameter monitoring detector (6), host computer (5), monitoring host computer (11), its characterized in that: an electric harmonic suppression unit (4) is connected in parallel between a system power supply (1) and a three-phase four-wire system electric load (3), and the electric harmonic suppression unit (4) is connected to an upper computer (5) through an upper computer interface; a load current transformer (2) is connected between the electric harmonic suppression unit (4) and the three-phase four-wire system electric load (3) in a penetrating manner, and the output end of the load current transformer (2) is connected to a load current sampling interface of the electric harmonic suppression unit (4); the full-parameter monitoring detector (6) is connected to the 485 communication port and the start-stop interface of the electrical harmonic suppression unit (4) through the 485 communication port and the start-stop interface.

2. An electrical fire monitoring system based on harmonic suppression as claimed in claim 1 wherein: the electric harmonic suppression unit (4) comprises a system power supply interface A, B, C, N, an active inversion and current transformation main body module, a load current sampling interface, a 485 communication interface, a start-stop interface and an upper computer interface; the method is characterized in that: the electrical harmonic suppression unit (4) is connected to a system power supply through a system power supply interface A, B, C, N; the active inversion current transformation main body module is connected with a system power interface A, B, C, N through the internal wiring of the electric harmonic suppression unit (4); a load current sampling port of the electric harmonic suppression unit (4) is connected to the output end of the load current transformer; a 485 communication interface of the electric harmonic suppression unit (4) is connected to a 485 communication interface of the full-parameter monitoring detector (6); the start-stop interface of the electrical harmonic suppression unit (4) is connected to the start-stop interface of the full-parameter monitoring detector (6); an upper computer interface of the electric harmonic suppression unit (4) is connected to an upper computer (5).

3. An electrical fire monitoring system based on harmonic suppression as claimed in claim 1 wherein: the full-parameter monitoring detector (6) comprises a 485 communication port, a start-stop interface, a residual current sampling port, a temperature sampling port, a system voltage sampling port, a system current sampling port and an alarm communication linkage port; the method is characterized in that: the full-parameter monitoring detector (6) is connected to the monitoring host (11) through an alarm communication linkage interface; the full-parameter monitoring detector (6) is connected to the output ends of the residual current sensor (7), the temperature detection sensor (8), the system voltage transformer (9) and the system current sensor (10) through the residual current sampling port, the temperature sampling port, the system voltage sampling port and the system current sampling port.

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