CN204178965U - The safety interlock system of 10kV ring main unit and off-tube Ore-controlling Role - Google Patents

Abstract

A safety locking device and a locking control system for a 10kV ring network cabinet, the safety locking device at least includes a ring network cabinet with a high-voltage sensor inside, the ring network cabinet has at least a grounding knife switch operating mechanism, and the high-voltage sensor is equipped with a A GYN2 high-voltage electric test display device is connected, and a GYNS mechanical padlock is installed on the grounding knife switch operating mechanism through a locking mechanism. The GYN2 high-voltage electric test display device and the GYNS mechanical padlock are equipped with a pairable GYN2 high-voltage electric test display device. Carry out the electric test and then carry out the computer key of GYNS mechanical padlock opening and closing action; Described locking management and control system, it comprises an industrial control host computer with background management software, this industrial control host computer is connected with computer key through a transmission adapter, and will The one-to-one correspondence between the high-voltage live display device set on the industrial control host and the locking device is transmitted to the computer key through the transmission adapter, and the safety locking device is controlled by the computer key; it has the advantages of convenient construction, safety and reliability, and reasonable structure. , can better improve the anti-misoperation locking function of the ring network cabinet and other characteristics.

Description

Safety locking device and locking control system of 10kV ring main unit

technical field

The utility model relates to a safety locking device and a locking management and control system of a 10kV ring network cabinet, belonging to the technical field of power pipe network safety assurance. the

Background technique

With the continuous increase of the city, the city's cleanliness and beautification requirements continue to increase, and the urban power cable network plays a pivotal role. At present, more than 90% of the general urban power cable network are ring network cabinets, and the ring network cabinets all adopt the "hand in hand" wiring mode. This mode presents a serious safety hazard at the normal disconnection switch - that is, the switch is in the heat. In the standby state, the grounding switch on the line side loses the lockout. For a long time, the distribution network has been frequently operated, and the main guarantee of safety is the check of the on-site switch of the operating personnel and the constraints of the operation ticket. When checking the status of the switch on the opposite side, there will be problems such as the long distance, the distance between the switch and the switch interval is very close and it is easy to misread the interval, and it is easy to cause serious vicious misoperation, that is, the grounding switch on the live line side. the

10kV switchgear is a very important power receiving and distribution equipment. In the safe power supply, it is clearly stipulated that the high-voltage switchgear must have the "five defenses" function, one of which is "prevent live connection and grounding switch". Under normal circumstances, the high-voltage switchgear achieves the purpose of "preventing the charging of the grounding switch" and "preventing the grounding wire from closing the circuit breaker" through mutual locking between the circuit breaker and the grounding switch, but this "live" is Whether it is charged or not is judged by the opening and closing of the circuit breaker. In the double-circuit power supply system, when the circuit breaker of the feed switch cabinet is in the open state, there is a reverse power transmission situation. In this case, the grounding switch is not blocked. , Once the grounding knife switch will cause a short circuit fault. Therefore, how to prevent the reverse power transmission high-voltage cabinet from closing the grounding knife switch is of great significance to the safe power supply. the

After investigation and investigation, at present the switch station mainly uses mechanical locks to artificially control the grounding operation mechanism, and some cabinets solve the false grounding fault by removing the grounding bar. Some institutions use an external locking box to solve the grounding operation. The disadvantage is that the overall size is too large, and it needs to be attached to the outside after destroying the original mask; 

(1) The traditional mechanical anti-error locking mainly relies on installing mechanical locks on the stroke position of electrical equipment, and the locking is completed through mechanical transmission devices. The structure is simple, the function is relatively single, and the failure rate of the switch is relatively high. It is mainly used in low-voltage power distribution systems.

(2) The traditional electromagnetic anti-misoperation locking is a kind of on-site electrical interlocking technology, which is mainly connected through the auxiliary contacts of related equipment, connected in series to the secondary circuit, and realized locking through electromagnetic devices. Reliable locking is the most basic form of electrical locking, but it needs to be connected to a large number of secondary cables, the wiring method is more complicated, and the operation and maintenance are more difficult. Its functions are also relatively few, and generally can only prevent the misoperation of switches, spacers and floor knives, but can't do anything about strayed into the electrified interval, the connection (removal) of the ground wire, etc. the

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art, and to provide an improvement on the basis of the existing ring network cabinets that have been used and installed with live display devices from the perspective of ensuring the safety of operators, and the construction is convenient. , safe and reliable, reasonable in structure, and can better improve the safety locking device and locking control system of the 10kV ring network cabinet with the anti-mislocking function of the ring network cabinet. the

The purpose of this utility model is accomplished through the following technical solutions, the safety locking device at least includes a ring network cabinet with a high-voltage sensor inside, the ring network cabinet has at least a grounding knife switch operating mechanism, and the The high-voltage sensor is connected with a high-voltage electric test display device, a locking mechanism is installed on the grounding knife switch operating mechanism, and a mechanical padlock is installed on the locking mechanism, and the high-voltage electric test display device and the mechanical padlock are correspondingly equipped with a It is a computer key that can perform electric inspection on the high-voltage electric inspection display device and then open and close the mechanical padlock. the

The computer key has a built-in digital current signal driver that can be connected with the photoelectric isolator in the high-voltage electrometry display device to drive the unlocking action set in the key. the

A locking management and control system for safety locking devices, the system includes an industrial control host with background management software, the industrial control host is connected to a computer key through a transmission adapter, and the high-voltage live display device set on the industrial control host The locking data one-to-one corresponding to the locking locks are transmitted to the computer key through the transmission adapter, and the safety locking device is controlled through the computer key. the

The utility model mainly starts from the perspective of ensuring the safety of operators, and improves on the basis of the existing ring network cabinet installed with a live display device. It has the advantages of convenient construction, safety and reliability, and reasonable structure. Features such as the anti-misoperation locking function of the network cabinet. the

Description of drawings

Fig. 1 is a structural composition block diagram of the utility model. the

Fig. 2 is a schematic diagram of the basic operation process described in the utility model. the

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings: As shown in Figure 1, the safety locking device and the locking control system of the 10kV ring network cabinet described in the utility model, wherein the safety locking device includes at least one with a high voltage sensor The ring network cabinet 1, the ring network cabinet 1 has at least a grounding knife switch operating mechanism, the high voltage sensor is connected to a high voltage electrometry display device 3, and a locking mechanism 4 is installed on the grounding knife switch operating mechanism 2 , and a mechanical padlock 5 is installed on the locking mechanism, and the high-voltage electric test display device 3 and the mechanical padlock 5 are correspondingly equipped with a device that can carry out electric test on the high-voltage electric test display device 3 and then open and close the mechanical padlock 5 computer key6. the

The computer key 6 of the utility model has a built-in digital current signal driver that can be connected with the photoelectric isolator in the high-voltage electrometry display device 3 to drive the unlocking action set in the key. the

The simplest embodiment of the utility model is: the key of the mechanical padlock 5 is placed in the key body of the computer key 6, and is locked in the key body under normal conditions and when the built-in driver is powered. If there is no current induction signal during electric inspection, the driver will be triggered to work, and the key will be ejected from the key body. At this time, the key protruding from the key body can be used to unlock the lock. the

The more intelligent embodiment of the utility model is: through the locking control system as shown in Figure 1, the system includes an industrial control host 8 with background management software 7, and the industrial control host 8 is connected with the computer key 6 through a transmission adapter , and transmit the one-to-one corresponding locking data between the high-voltage charged display device 3 set on the industrial control host 8 and the locking lock 5 to the computer key 6 through the transmission adapter 9, and control the safety locking device through the computer key 6. the

The utility model adopts the technical scheme of "computer key + display electric testing device + locking lock". The technical scheme installs a high-voltage live display device on the cabinet, and locks the grounding knife gate operating mechanism with a lock. Only when there is no electricity, the lock is allowed to be unlocked, so as to realize the mandatory locking of the corresponding equipment. the

Example:

The principle of the utility model is: when the cable side is electrified, firstly, through the capacitive voltage divider, the electrified condition of the high-voltage side is collected from the primary circuit, and converted into a weak current AC signal; then, the soft electrical signal is converted into a standard digital At the same time, through photoelectric isolation, input the charging status to the computer key driver; finally, the computer key judges that the line is charged, and locks the grounding operating mechanism; and in the case of no charging, the driver closes the electromagnetic lock and operates the grounding operating mechanism.

As shown in Figure 1, the utility model is mainly composed of a background management software, a transmission adapter, a computer key, a high-voltage electric test display device, and a mechanical padlock. The background management software can set the one-to-one correspondence and locking logic between the high-voltage live display device and the locking lock, and then transmit the self-study data with the corresponding relationship to the computer key through the transmission adapter. After that, when operating the locking lock, the computer The key will first require an electric test operation on the device, and only when the device reports no electricity is it allowed to unlock the corresponding locking device, otherwise it cannot be operated to achieve the purpose of mandatory locking. A set of background management software, transmission adapters and computer keys can manage all the ring main unit locking points of the entire power supply company, and the power supply company can equip a corresponding number of computer keys according to the number of operating teams. the

Yes: First, the live locking logic can be flexibly configured by special management software; second, a mandatory electric inspection operation is added to the unlocking operation process, and the live state is included in the unlocking operation logic judgment; third, a management system can manage multiple opening and closing stations, which can be locked Cabinet door, net door, grounding knife switch, operating mechanism and other equipment; fourth, the equipment installed on the whole set of cabinets does not need power supply, which is especially suitable for distribution network equipment; fifth, the lock can also be equipped with an emergency unlocking mechanism for special case unlocked. the

The application of the utility model changes the traditional operation mode in which the grounding switch on the line side of the medium voltage switchgear mainly relies on manual judgment, so that the anti-misoperation of the medium voltage switchgear in the substation is technically guaranteed, and effectively prevents the The possibility of human misoperation during the switching operation further ensures the safety of people, power grids and equipment. At the same time, the system is simple and convenient to operate, which improves the labor efficiency of operators, and the comprehensive benefits generated by it are obvious. the

The installation and debugging of the utility model are:

The display device is easy to install, the original high-voltage live display device on the cabinet is removed, and the original high-voltage sensor in the cabinet is used to connect the signal to our display device. The mechanical padlock can be easily installed on the existing locking mechanism, or the mechanical lock can be hung after installing our customized locking mechanism.

After the installation is completed, the self-study data with the corresponding relationship is transmitted to the computer key through the transmission adapter. When the unlocking operation is required, first check the power of the device through the computer key. If there is power, the computer key will prompt "Operation Prohibited" and the corresponding mechanical lock cannot be opened. If there is no electricity, you can unlock the corresponding ground knife. At this time, the computer key will also judge whether the code of the mechanical lock is correct. If it is correct, the lock can be opened. If the code does not correspond, unlocking is prohibited, so as to prevent electrification. Misoperation accidents of the grounding knife occur; all operation results can also be sent back to the management software for easy query. the

The general operation process is shown in Figure 2, and the content shown in Figure 2 is also the content of the embodiment of the present invention. the

Claims (3)

1. A safety locking device for a 10kV ring network cabinet, which at least includes a ring network cabinet that is provided with a high-voltage sensor, and the ring network cabinet has at least a grounding knife switch operating mechanism, which is characterized in that the high-voltage sensor is connected to There is a high-voltage electric test display device, a locking mechanism is installed on the grounding knife switch operating mechanism, and a mechanical padlock is installed on the locking mechanism. The high-voltage electric test display device and the mechanical padlock are correspondingly equipped with a pair of high-voltage test The electric display device conducts electric inspection and then performs the computer key for opening and closing the mechanical padlock. 2. The safety locking device of the 10kV ring main unit according to claim 1, characterized in that the computer key has a built-in digital current signal driver that can be connected to the photoelectric isolator in the high-voltage electrometry display device to drive the key The unlocking action set in it. 3. A locking management and control system for the safety locking device described in claim 1 or 2, the system includes an industrial control host with background management software, characterized in that the industrial control host is connected to the computer key through a transmission adapter , and transmit the one-to-one corresponding locking data between the high-voltage charged display device set on the industrial control host and the locking device to the computer key through the transmission adapter, and control the safety locking device through the computer key.