Three-phase linkage high-voltage isolation switch operation state auxiliary analysis system

Abstract

The utility model discloses a three-phase linkage high-voltage isolation switch operation state auxiliary analysis system, which comprises an analog quantity acquisition module, a switching value acquisition module, a CPU module and a switching value output module, and is characterized in that the signal input end of the analog quantity acquisition module is electrically connected with the signal output end of an analog quantity acquisition mutual inductor; the signal output end is electrically connected with the signal input end of the CPU module; the signal input end of the switching value acquisition module is electrically connected with an isolating switch position node, and the signal output end of the switching value acquisition module is electrically connected with the signal input end of the CPU module; the signal output end of the CPU module is electrically connected with the signal input end of the switching value output module, and the signal output end of the switching value output module is electrically connected with the signal input end of the power station monitoring system. The system can analyze the running state of the disconnecting switch in real time, and can timely analyze and send out an early warning signal for abnormal operation when a connecting rod of the three-phase linkage disconnecting switch falls off, overload operation of a motor, long-time operation of the disconnecting switch and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of high - voltage disconnectors in power systems, and particularly relates to an auxiliary analysis system for the operating state of a three - phase linkage high - voltage disconnector. Background Technique

[0002] The disconnector is an important primary device in the power system, and its operating state is particularly important for the operation of the power system. Currently, most high - voltage disconnectors adopt a three - phase linkage method to realize opening and closing operations, and their operating state is mainly determined by the opening and closing auxiliary modules of the main drive - phase disconnector. However, in the actual operation process, there are situations such as the shedding of the three - phase linkage rod or other abnormalities, resulting in one or two phases of the three - phase linkage disconnector being unable to operate in place normally. And the actual displayed disconnector state is determined by the main drive phase, which fails to truly reflect the actual state of the three - phase disconnector, and further leads to the non - full - phase operation of the circuit breaker, affecting the stable operation of the power system. In severe cases, it will burn out primary main equipment such as high - voltage disconnectors. Content of the Utility Model

[0003] In order to solve the above problems, the utility model proposes an auxiliary analysis system for the operating state of a three - phase linkage high - voltage disconnector. For the operation process of the disconnector, this system is used to assist in analyzing the actual operating state of the three - phase linkage disconnector, providing an auxiliary criterion for the analysis of the abnormal state of the three - phase linkage disconnector and the subsequent operation of the circuit breaker.

[0004] The technical solution adopted by the utility model is as follows:

[0005] An auxiliary analysis system for the operating state of a three - phase linkage high - voltage disconnector includes an analog quantity acquisition module, a digital quantity acquisition module, a CPU module, and a digital quantity output module. The signal input end of the analog quantity acquisition module is electrically connected to the signal output end of the analog quantity acquisition mutual inductor, and the signal output end is electrically connected to the signal input end of the CPU module; the signal input end of the digital quantity acquisition module is electrically connected to the disconnector position node, and the signal output end is electrically connected to the signal input end of the CPU module; the signal output end of the CPU module is electrically connected to the signal input end of the digital quantity output module, and the signal output end of the digital quantity output module is electrically connected to the signal input end of the power station monitoring system.

[0006] Further, the analog quantity acquisition mutual inductor is connected to the control circuit and the motor circuit of the disconnector, and collects the status information of the control circuit and the motor circuit.

[0007] Further, the analog quantity acquisition module is configured to collect the status information collected by the analog quantity acquisition mutual inductor, and send the processed data to the CPU module through analog - to - digital conversion.

[0008] Further, the status information of the control loop and the motor loop collected by the analog quantity acquisition mutual inductor includes voltage and current information.

[0009] Further, the digital quantity acquisition module is configured to collect and process the disconnector position nodes and send them to the CPU module.

[0010] Further, the disconnector position nodes are taken from the auxiliary position contacts of the disconnector.

[0011] Further, the CPU module is configured to calculate and analyze the operation process of the disconnector based on the collected information data, and then calculate the relevant operation status of the disconnector in combination with the status of the auxiliary position nodes of the disconnector.

[0012] Further, the relevant operation status of the disconnector includes: the opening and closing positions of the disconnector, motor overload, and control loop abnormal information.

[0013] Further, the digital quantity output module is configured to send the digital quantity status output result to the power station monitoring system according to the result calculated by the CPU module.

[0014] Further, the auxiliary analysis system for the operation status of the three-phase linkage high-voltage disconnector further includes a power supply module, and the power supply module is configured to supply power to each module.

[0015] The beneficial effects of the present utility model are as follows:

[0016] The auxiliary analysis system for the operation status of the three-phase linkage high-voltage disconnector proposed by the present utility model collects the operating current of the disconnector control loop and the motor loop through the analog quantity acquisition module, collects the opening and closing position nodes of the disconnector through the digital quantity acquisition module, analyzes whether the operation process of the disconnector is normal through the operation algorithm of the CPU module, and finally sends out the abnormal signal through the digital quantity output module. In the operation of the high-voltage three-phase linkage disconnector, the present utility model can analyze the operation status of the disconnector in real time, and can timely analyze and send out warning signals for abnormal operations such as the disconnection of the connecting rod of the three-phase linkage disconnector, motor overload operation, and long-time operation of the disconnector. Description of the Drawings

[0017] Figure 1 is a schematic diagram of an auxiliary analysis system for the operation status of a three-phase linkage high-voltage disconnector according to an embodiment of the present utility model. Detailed Embodiments

[0018] In order to have a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present utility model.

[0019] As Figure 1 shown, this embodiment provides an auxiliary analysis system for the operating state of a three-phase interlocking high-voltage disconnector, including an analog quantity acquisition module 2, a digital quantity acquisition module 3, a CPU module 4, a digital quantity output module 5, and a power supply module 6. Among them, the signal input end of the analog quantity acquisition module 2 is electrically connected to the signal output end of the analog quantity acquisition transformer 7, and the signal output end is electrically connected to the signal input end of the CPU module 4; the signal input end of the digital quantity acquisition module 3 is electrically connected to the disconnector position node 8, and the signal output end is electrically connected to the signal input end of the CPU module 4; the signal output end of the CPU module 4 is electrically connected to the signal input end of the digital quantity output module 5, and the signal output end of the digital quantity output module 5 is electrically connected to the signal input end of the power station monitoring system 9.

[0020] In this embodiment, the analog quantity acquisition transformer 7 is connected to the control circuit and the motor circuit of the disconnector to collect information such as voltage and current related to the circuit; the analog quantity acquisition module 2 collects information such as current and voltage of the analog quantity acquisition transformer 7 and sends the processed data to the CPU module 4 through analog-to-digital conversion; the digital quantity acquisition module 3 collects and processes the auxiliary position nodes of the disconnector and sends them to the CPU module 4; the CPU module 4 calculates and analyzes the operation process of the disconnector through internal algorithms based on the collected information data, and then combines the state of the auxiliary position nodes of the disconnector to calculate and analyze the operating state of the disconnector; the digital quantity output module 5 outputs the results analyzed by the CPU module 4 through the digital quantity state. For example, information such as the opening and closing position of the disconnector, motor overload, and control circuit abnormality can be sent to the power station monitoring system 9 for the feedback of information results; the power supply module 6 mainly provides power for the auxiliary analysis system and its related modules to enable the system to operate normally.

[0021] When the disconnector is closed or opened, under normal operating conditions, the closing or opening time of the disconnector is fixed. Similarly, the voltage and current changes in its control circuit and motor circuit are also fixed. The closing or opening time of the disconnector is used as the operation time of the disconnector based on the duration of the voltage change in the control circuit, and the current change in the motor circuit is used as the criterion for judging the operating state of the motor. The closing or opening time of the disconnector analyzed by the CPU module 4 is compared with the normal operation time, and the operation time and the auxiliary position of the disconnector are analyzed in combination. If both the time and the position are satisfied, the closing or opening state of the disconnector is correct. If not, it can be analyzed that the disconnector is not fully closed or opened. Similarly, the current in the motor circuit is compared with the normal operating current. If they are consistent, the motor is operating normally. If not, there are situations such as single-phase loss or overload in the motor. Of course, the specific analysis method is not limited to the above description method, and a combined analysis of multiple state variables can be carried out in combination with the actual situation of the specific disconnector.

[0022] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. And the changes and modifications made by those skilled in the art that do not depart from the spirit and scope of the present invention should all be within the protection scope of the appended claims of the present invention.

Claims

1. A three-phase linkage high-voltage disconnector operating status auxiliary analysis system, characterized in that: The invention comprises an analog quantity acquisition module (2), a switch quantity acquisition module (3), a CPU module (4) and a switch quantity output module (5), wherein the signal input end of the analog quantity acquisition module (2) is electrically connected to the signal output end of the analog quantity acquisition transformer (7), and the signal output end is electrically connected to the signal input end of the CPU module (4); the signal input end of the switch quantity acquisition module (3) is electrically connected to the isolation switch position node (8), and the signal output end is electrically connected to the signal input end of the CPU module (4); the signal output end of the CPU module (4) is electrically connected to the signal input end of the switch quantity output module (5), and the signal output end of the switch quantity output module (5) is electrically connected to the signal input end of the power station monitoring system (9).

2. The three-phase linkage high-voltage disconnector operating status auxiliary analysis system according to claim 1 is characterized in that: The analog quantity acquisition mutual inductor (7) is connected to the control circuit and the motor circuit of the isolating switch, and acquires status information of the control circuit and the motor circuit.

3. The three-phase linkage high-voltage disconnector operating status auxiliary analysis system according to claim 2 is characterized in that: The analog quantity acquisition module (2) is configured to collect state information acquired by the analog quantity acquisition transformer (7), and to send the processed data to the CPU module (4) through analog-to-digital conversion.

4. The three-phase linkage high-voltage disconnector operating status auxiliary analysis system according to claim 2 is characterized in that: The state information of the control circuit and the motor circuit collected by the analog quantity collection mutual inductor (7) includes voltage and current information.

5. The three-phase linkage high-voltage disconnector operating status auxiliary analysis system according to claim 1 is characterized in that: The switch quantity acquisition module (3) is configured to collect and process the isolating switch position node (8) and send it to the CPU module (4).

6. The three-phase linkage high-voltage disconnector operating status auxiliary analysis system according to claim 1 is characterized in that: The isolating switch position node (8) is taken from the isolating switch auxiliary position contact.

7. The three-phase linkage high-voltage disconnector operating status auxiliary analysis system according to claim 1 is characterized in that: The CPU module (4) is configured to calculate and analyze the operation process of the isolating switch according to the collected information data, and then calculate the relevant operation state of the isolating switch in combination with the auxiliary position node state of the isolating switch.

8. The three-phase linkage high-voltage disconnector operating status auxiliary analysis system according to claim 7 is characterized in that: The relevant operating status of the isolating switch includes: the opening and closing positions of the isolating switch, motor overload and control circuit abnormality information.

9. The three-phase linkage high-voltage disconnector operating status auxiliary analysis system according to claim 1 is characterized in that: The switch quantity output module (5) is configured to send the result of calculation by the CPU module (4) to the power station monitoring system (9) through the switch quantity state output result.

10. The three-phase linkage high-voltage disconnector operating status auxiliary analysis system according to claim 1 is characterized in that: It also comprises a power supply module (6), wherein the power supply module (6) is configured to provide power to each module.

Images