CN215911945U - Unattended system based on total drop substation - Google Patents

Abstract

The utility model discloses an unattended system based on a main drop substation, which comprises: an SF6 leakage alarm subsystem and a high-voltage wireless temperature measurement subsystem; wherein, SF6 leakage warning subsystem arranges in total transformer substation GIS room that falls, and includes: the system comprises a power supply module, a sensor module, an SF6 core control module, an alarm module and a fan controller; the high-voltage wireless temperature measurement subsystem is arranged in a high-voltage switch chamber of a main drop transformer substation and comprises: the temperature measuring component, the main controller HN-2800A and the communication module AOPRE-RS 485. The utility model can transmit and display a plurality of parameters such as SF6 and O2 contents of each collector, the temperature of a moving contact and a static contact of a breaker, the alarm state and the like in real time, thereby carrying out remote real-time monitoring and alarm on a 35KVGIS chamber and a10 KV high-voltage switch chamber of a substation, predicting the hidden production trouble in advance and eliminating the fault; the labor intensity of workers is reduced, the cost is saved, and the unattended function is really realized.

Description

Unattended system based on total drop substation

Technical Field

The utility model belongs to the field of transformer substations, and particularly relates to an unattended system based on a main drop transformer substation.

Background

At present, unattended systems in most of domestic total-drop transformer substations are mainly integrated with an automatic microcomputer protection system, a video monitoring system, a safety precaution system, a fire alarm system and the like, and the working efficiency is effectively improved in the mode, so that errors caused by personnel inspection are reduced; however, the system only has monitoring after hidden danger occurs, is not predictive, often has production accidents when problems are discovered, and cannot eliminate equipment hidden danger in advance. The general transformer substation that falls adopts four shifts three operation modes to carry out periodic blind inspection by four workman, relies on the traditional way of artifical fault point of seeking, and the management is difficult, and work efficiency is low, and personnel fortune dimension is with high costs, can't satisfy the security and the reliability of the required electric power of normal production, can't adapt to the information-based intelligent demand of quick development.

At present, the department substation mainly comprises a 35KVGIS chamber and a10 KV high-voltage switch chamber. SF6 gas used in GIS chambers is widely used in power systems with excellent insulation and arc extinguishing properties; similarly, a high-voltage handcart is also a core component of a high-voltage switch cabinet, and in the long-term operation process of equipment, the temperature of a handcart contact in the high-voltage switch cabinet rises due to poor contact, overlarge contact resistance or overload operation, so that an overheating phenomenon is generated, and interphase short circuit can be caused seriously or even caused, thereby burning the equipment seriously and endangering the safe operation of other adjacent equipment.

The existing equipment is mainly used for professional inspection by personnel on duty who generally go down to duty, although the gas SF6 in the 35KVGIS chamber is colorless, tasteless and nontoxic inert gas, some highly toxic substances can be generated under the action of electric arc and corona or after encountering moisture, even if the inspection personnel find that SF6 leaks in time, a small amount of toxic gas can be inhaled, oxygen deficiency and even death can be caused seriously, and the safety of life and property of staff is threatened directly; meanwhile, the switch cabinet is damaged, most of the damage is related to large current, only the regular blind inspection is needed, the working efficiency is greatly reduced by the traditional method of manually searching fault points, and the potential fault hazards are difficult to find and eliminate in time during the inspection.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects of the prior art and provides an unattended system based on a main drop substation, which can transmit and display a plurality of parameters such as SF6 and O2 contents of each collector, the temperature of a moving contact and a static contact of a breaker, an alarm state and the like in real time, thereby remotely monitoring and alarming a 35KVGIS chamber and a10 KV high-voltage switch chamber of the substation in real time, predicting the hidden production danger in advance and eliminating the fault; the labor intensity of workers is reduced, the cost is saved, and the unattended function is really realized.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model relates to an unattended system based on a main drop substation, which is characterized by comprising the following components: an SF6 leakage alarm subsystem and a high-voltage wireless temperature measurement subsystem;

the SF6 leakage alarm subsystem is arranged in a GIS room of a main drop substation and comprises: the system comprises a power supply module, a sensor module, an SF6 core control module, an alarm module and a fan controller;

the sensor module consists of a temperature oxygen sensor and an SF6 sensor;

an X1 pin and an X2 pin of the SF6 core control module are respectively connected with a JX1 terminal and a JX2 terminal of the sensor module through RS485 data lines and are used for transmitting the measured SF6 concentration information;

the alarm module consists of a relay, an LED lamp and a buzzer; when the level of the S1 pin of the SF6 core control module changes, the Z13 pin of the relay coil drives the relay coil to attract, and meanwhile, the Z1 pin and the Z2 pin of the relay drive an LED lamp and a buzzer to act respectively;

the A1 pin and the A2 pin of the fan controller are respectively connected with the S6 pin and the S8 pin of the SF6 core control module, when the level of the S6 pin of the core control module changes, the A1 pin of the fan controller drives a contactor coil in the fan controller to attract and be combined, and therefore the U pin, the V pin and the W pin of the fan controller are used for driving a three-phase 380V fan to act;

the power supply module is respectively connected with the sensor module, the SF6 core control module, the alarm module and the fan controller through power lines, so that power is supplied to each module;

the high-voltage wireless temperature measurement subsystem is arranged in a high-voltage switch chamber of a main reducing substation and comprises: the temperature measuring component, the main controller HN-2800A and the communication module AOPRE-RS 485;

the temperature measuring component consists of a temperature sensor TMP35 and a wireless communication module CC 1020; when the current on the contact arm of the circuit breaker exceeds a set threshold value after the circuit breaker is switched on and put into operation, the Vout pin of the temperature sensor transmits a measured temperature signal to the No. 2 pin of the wireless communication module CC 1020;

the pin a10 of the main controller HN-2800A receives the temperature signal from the pin No. 6 of the wireless communication module CC1020 and displays the temperature in real time;

the pins A15 and A16 of the main controller HN-2800A are connected with the pins F + and F-of the communication module CC1020, so that the temperature signal is transmitted to a control center through an optical fiber or an Ethernet.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, all operation data are completely accessed to the remote comprehensive intelligent monitoring platform of the main transformer substation through the SF6 leakage alarm subsystem and the high-voltage wireless temperature measurement subsystem, real-time monitoring, query and alarm are carried out on the main transformer substation, the stability of the SF6 and the high-voltage trolley is ensured, personnel-specific attendance is not required, the safety is high, the labor is saved, the operation cost is reduced, the control level of equipment is improved, and the system has important significance for safe and reliable operation of the main transformer substation.

Drawings

FIG. 1 is a schematic structural diagram of an SF6 leakage alarm system of the present invention;

FIG. 2-1 is a block diagram of a high voltage wireless temperature measurement subsystem of the present invention;

fig. 2-2 is a block diagram of the high-voltage wireless temperature measurement subsystem of the present invention.

Detailed Description

In this embodiment, an unmanned on duty system based on total transformer substation that falls includes: an SF6 leakage alarm subsystem shown in figure 1 and a high-voltage wireless temperature measurement subsystem shown in figure 2;

as shown in fig. 1, the SF6 leakage alarm subsystem is arranged in a GIS room of a main substation and comprises: the system comprises a power supply module, a sensor module, an SF6 core control module, an alarm module and a fan controller;

the sensor module consists of an oxygen sensor and an SF6 sensor; the device is arranged in a GIS room, is arranged on channel steel which is 10-15cm away from the ground, and accurately measures the oxygen content and the SF6 gas content in the air within the range of 0-3000 ppm.

The SF6 core control module is installed outside a GIS room and is in a wall-mounted mode, an X1 pin and an X2 pin of the module are respectively connected with a JX1 terminal and a JX2 terminal of a sensor module of each acquisition point through RS485 data lines and are used for transmitting measured oxygen concentration and SF6 concentration information; and the measured concentration of the SF6 gas and the concentration of oxygen are displayed on the SF6 core control module in real time.

The alarm module is arranged above the SF6 core control module and consists of a relay, an LED lamp and a buzzer; when the SF6 of the GIS chamber generates a leakage condition and the oxygen content is lower than the allowable threshold value of 18%, the level of the S1 pin of the SF6 core control module changes, the Z13 pin of the relay coil drives the relay coil to attract and be combined, and meanwhile, the Z1 pin and the Z2 pin of the relay drive the LED lamp and the buzzer to act respectively; the system gives out audible and visual alarm to prompt the inspection personnel not to enter a GIS room with SF6 leakage to cause poisoning and suffocation, thereby more effectively ensuring personal safety.

The fan controller is arranged outside a GIS room and connected with a three-phase fan through a 2.5 square cable, the fan is arranged on the indoor wall of the GIS and is required to be about 20CM away from the ground (SF6 gas is heavier than air), the fan needs to exhaust from inside to outside in a turning direction, pins A1 and A2 of the fan controller are respectively connected with pins S6 and S8 of an SF6 core control module, when the level of the pin S6 of the core control module changes, the pin A1 of the fan controller drives a contactor coil in the fan controller to suck, and therefore the U pin, the V pin and the W pin of the fan controller are used for driving the three-phase 380V fan to act; after the fan is started, the oxygen content of the power room is rapidly increased, and the personal safety is ensured; under the condition, the on-site leakage point can be found and timely processed through the number of the abnormal concentration module displayed on the SF6 core control module, and the hidden danger of equipment is eliminated.

The power supply module is respectively connected with the sensor module, the SF6 core control module, the alarm module and the fan controller through power lines so as to supply power to each module;

in this embodiment, the high-voltage wireless temperature measurement subsystem is arranged in the high-voltage switch room of the total drop substation, and includes: the temperature measuring component, the main controller HN-2800A and the communication module AOPRE-RS 485; as shown in fig. 2-1;

1 temperature measurement component is respectively configured on 6 insulating arms about every high tension switchgear, and temperature measurement component can directly detect the insulating arm temperature of cubical switchboard, and then judges whether the running state of equipment is good. The temperature measuring component consists of a temperature sensor TMP35 and a wireless communication module CC 1020; when the circuit breaker is switched on and put into operation, the data processing, transmitting and receiving circuits of the sensor part are powered by C T power supplies induced by the bus, and when the current on the contact arm of the circuit breaker exceeds a set threshold (the current of the contact arm is more than or equal to 5A), the induced current output can provide a working power supply for the sensor signal processing module, so that the problem that the long-term operation cannot be realized due to the fact that the battery is easy to lose power is solved. A pin Vout of the temperature sensor transmits a measured temperature signal to a pin No. 2 of the wireless communication module CC 1020; each temperature measurement component corresponds to one digital code and is transmitted in a digital coding mode.

As shown in fig. 2-2, the main controller HN-2800A is installed on the door of the high-voltage switch cabinet, each controller can receive 6 temperature measurement component signals, when the pin a10 of the main controller receives the temperature signal transmitted from the pin No. 6 of the wireless communication module CC1020, and the temperature signal is directly displayed on the panel of the main controller, and at the same time, it is determined whether the temperature alarm value exceeds the preset temperature alarm value, if the temperature rise exceeds the limit, the relay alarm contact signal is sent out (the normally open point of the pins a5 and a6 is closed), and at the same time, the main controller has an RS485 serial interface, that is, the pin a15 and the pin a16 of the main controller HN-2800A are connected with the pin F + and the pin F of the communication module AOPRE-RS485, so that the temperature signal is transmitted to the control center through the optical fiber or the ethernet.

In conclusion, the utility model is based on the electric automation technology, can realize early judgment and early warning of the hidden trouble of the fault at lower cost, thoroughly gets rid of the conventional way of regularly and blindly inspecting the substation in the past and finding the fault point manually, improves the working efficiency, ensures the safety and reliability of the electric power required by normal production, has important significance on the safe and reliable operation of the main drop substation, provides scientific basis for the maintenance and overhaul of the main drop substation, and realizes the development of the substation to self diagnosis and intellectualization.

Claims (1)

1. An unattended system based on a main drop substation is characterized by comprising: an SF6 leakage alarm subsystem and a high-voltage wireless temperature measurement subsystem;

the SF6 leakage alarm subsystem is arranged in a GIS room of a main drop substation and comprises: the system comprises a power supply module, a sensor module, an SF6 core control module, an alarm module and a fan controller;

the sensor module consists of a temperature oxygen sensor and an SF6 sensor;

an X1 pin and an X2 pin of the SF6 core control module are respectively connected with a JX1 terminal and a JX2 terminal of the sensor module through RS485 data lines and are used for transmitting the measured SF6 concentration information;

the alarm module consists of a relay, an LED lamp and a buzzer; when the level of the S1 pin of the SF6 core control module changes, the Z13 pin of the relay coil drives the relay coil to attract, and meanwhile, the Z1 pin and the Z2 pin of the relay drive an LED lamp and a buzzer to act respectively;

the A1 pin and the A2 pin of the fan controller are respectively connected with the S6 pin and the S8 pin of the SF6 core control module, when the level of the S6 pin of the core control module changes, the A1 pin of the fan controller drives a contactor coil in the fan controller to attract and be combined, and therefore the U pin, the V pin and the W pin of the fan controller are used for driving a three-phase 380V fan to act;

the power supply module is respectively connected with the sensor module, the SF6 core control module, the alarm module and the fan controller through power lines, so that power is supplied to each module;

the high-voltage wireless temperature measurement subsystem is arranged in a high-voltage switch chamber of a main reducing substation and comprises: the temperature measuring component, the main controller HN-2800A and the communication module AOPRE-RS 485;

the temperature measuring component consists of a temperature sensor TMP35 and a wireless communication module CC 1020; when the current on the contact arm of the circuit breaker exceeds a set threshold value after the circuit breaker is switched on and put into operation, the Vout pin of the temperature sensor transmits a measured temperature signal to the No. 2 pin of the wireless communication module CC 1020;

the pin a10 of the main controller HN-2800A receives the temperature signal from the pin No. 6 of the wireless communication module CC1020 and displays the temperature in real time;

the pins A15 and A16 of the main controller HN-2800A are connected with the pins F + and F-of the communication module CC1020, so that the temperature signal is transmitted to a control center through an optical fiber or an Ethernet.

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