101-channel self-loop test box

Abstract

The invention provides a 101-channel self-loop test box, and belongs to the technical field of electric power operation and maintenance. According to the structure, at least two self-loop lines are connected between a transmitting line and a receiving line from a telecontrol device to a monitoring master station, a controller for controlling the on-off state of one self-loop line is arranged on one self-loop line, a solid handle is arranged on the controller, an intermediate relay for controlling the on-off state of the other self-loop line is arranged on the other self-loop line, and the solid handle is connected with the intermediate relay. And the intermediate relay responds to a remote control instruction. According to the invention, when the 101 channel is interrupted, field operation personnel arrive at the field and then knock a handle to the manual test part, so that the 101 channel can be subjected to self-loop test, and whether the 101 channel is on or off is judged. And whether the 101 channel has a fault or not can be judged through remote control testing performed by 104 channel centralized control personnel, so that the time for removing the fault is shortened, and the safe and stable operation capability of the power grid is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power operation and maintenance, and specifically relates to a 101-channel self-loop test box. Background Art

[0002] Electricity is the pillar of national economic development, so ensuring the safe and stable operation of the power grid is the top priority of power companies. At present, the four remote information such as remote control, telemetry, and telesignaling at the substation end (substation end) are uploaded to the dispatching and monitoring system (master station end), usually using 101 analog channels and 104 digital channels to form a one-master-one-standby data transmission mode. However, due to the extremely unstable transmission of the 101 channel, the 101 channel is often interrupted, resulting in the master station monitoring being unable to monitor the operation of the substation end equipment in real time. For this reason, a device that can facilitate operating personnel and monitoring personnel to quickly, conveniently, and correctly judge the interruption of the 101 channel has a high practical value and greatly improves the ability to judge faults. There is no good processing method in the prior art, and we can only wait for personnel to arrive at the scene to check one by one. Summary of the invention

[0003] The technical problem to be solved by the present invention is: when channel 101 is interrupted, how to quickly and conveniently determine whether channel 101 is connected or disconnected.

[0004] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0005] The 101-channel self-loop test box has at least two self-loop lines connected between the sending line and the receiving line from the remote control device to the monitoring main station. A controller for controlling its on-off is provided on one of the self-loop lines, and a physical handle is provided on the controller. An intermediate relay for controlling its on-off is provided on the other self-loop line, and the intermediate relay responds to remote control instructions.

[0006] Preferably, the intermediate relay responds to remote control instructions through the remote control device.

[0007] Preferably, at least two contacts are provided on the controller, one of which is located on one of the self-loop lines, and the other is located on the power supply circuit of the manual test status monitoring light. When the handle is triggered, the two contacts are connected.

[0008] Preferably, at least four contacts are provided on the controller, the third contact is located on the sending line or the receiving line from the remote control device to the monitoring main station, and the fourth contact is located on the power supply circuit of the normal operating status monitoring light. When the handle is not triggered, the third contact and the fourth contact are connected.

[0009] Preferably, at least two contacts are provided on the intermediate relay, one of which is located on the other self-loop line, and the other is located on the power supply circuit of the remote control test status monitoring light. When the intermediate relay is triggered in response to the remote control command, the two contacts are connected.

[0010] The present invention discloses a 101 channel self-loop test box. With the present invention, when the 101 channel is interrupted, the on-site operator can perform a self-loop test on the 101 channel by turning the handle to the manual test part after arriving at the site, and determine whether the 101 channel is on or off. The 104 channel centralized control personnel can also remotely perform a remote control test to determine whether the 101 channel is faulty, thereby reducing the troubleshooting time and greatly improving the safe and stable operation capability of the power grid. The present invention facilitates the operator and the monitoring personnel to quickly, conveniently and correctly determine the interruption of the 101 channel, greatly improves the ability to determine faults, and has high practical value.

[0011] The beneficial effects of the present invention are also concentrated in the following aspects:

[0012] (1) The present invention has a simple structure and is easy to operate, which greatly reduces the troubleshooting time.

[0013] (2) The device is small in size, easy to install and requires short operation time.

[0014] (3) By creating a self-loop circuit, maintenance personnel can find the cause of the fault, improve the efficiency of fault detection, and effectively reduce the interruption time of channel 101. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the schematic diagram of the 101 channel.

[0016] Figure 2 It is a schematic diagram of the present invention.

[0017] Figure 3 It is the circuit diagram of the status monitoring light when channel 101 is operating normally in the present invention.

[0018] Figure 4 It is the circuit diagram of the status monitoring light of the 101-channel manual test part in the present invention.

[0019] Figure 5 It is the principle diagram of the 101-channel remote control test part in the present invention;

[0020] Figure 6 It is the circuit diagram of the status monitoring light of the 101-channel remote control test part in the present invention;

[0021] Figure 7 It is a logic block diagram of the operation process of the present invention. DETAILED DESCRIPTION

[0022] The specific embodiments of the present invention will be described in detail below. In order to avoid too much unnecessary details, the well-known structures or functions will not be described in detail in the following examples. The approximate language used in the following examples can be used for quantitative expression, indicating that the quantity can be allowed to have a certain change without changing the basic function. Unless otherwise defined, the technical and scientific terms used in the following examples have the same meaning as those generally understood by those skilled in the art to which the present invention belongs.

[0023] The communication between the substation and the master station consists of 104 digital channels (main channels) and 101 analog channels (backup channels). The transmission principle of the 101 channels is as follows: Figure 1 shown.

[0024] Channel 101 adopts the RS485 serial communication mode of receiving and transmitting. The remote control device at the substation is connected to the monitoring master device at the master station. When the receiving and transmitting links in the transmission path of channel 101 are normal, channel 101 at the master station shows that the channel is normal. When the receiving and transmitting links in the transmission path of channel 101 are interrupted, channel 101 at the master station shows that the channel is interrupted, and the substation monitoring function is lost at the same time.

[0025] Figure 2 This is the principle diagram of the self-loop test of channel 101, which is divided into two parts: on-site manual test and remote control test. When channel 101 is interrupted, the on-site operator can perform a self-loop test on channel 101 by turning the ZK (handle) to the manual test part after arriving at the site to determine whether channel 101 is connected or disconnected. The 104 channel centralized control personnel can also perform a remote control test to determine whether channel 101 is faulty, thereby reducing the time for troubleshooting and greatly improving the safe and stable operation capability of the power grid.

[0026] Manual testing principle:

[0027] Figure 2 In the middle, ZK is the handle. In normal operation, the handle is turned to the normal operation state. At this time, the 1-2 and 5-6 contacts are connected, and the normal operation light is on. Figure 3 The channel operation status can be observed by observing the operation light on site. "×" means on, and "-" means off (see Table 1 below).

[0028] When a fault occurs in channel 101, the main station monitoring system will find that channel 101 is broken, and will notify the operator to go to the site to check the condition of channel 101 and check whether the channel is good or bad. The operator can move the handle ZK of the self-loop test box of channel 101 to the manual test position, and then 3-4 and 7-8 are turned on. When 3-4 is turned on, the receiving and sending of channel 101 can be short-circuited to realize channel self-loop and check the channel status. When 7-8 is turned on. The manual channel test light circuit is connected, and the light is on. Figure 4shown.

[0029] Remote control test principle:

[0030] When channel 101 is interrupted, the monitoring personnel can also test the quality of channel 101 through remote control of channel 104. Figure 5 shown.

[0031] The monitoring personnel remotely controls the remote channel test button, which is sent to the measurement and control device through the telecontrol device. At this time, the contact of the measurement and control device is closed, and the intermediate relay ZJ is activated. Figure 2 The ZJ1 contact is closed, so that the receiving and transmitting of channel 101 are short-circuited, and the channel self-loop function is realized. The ZJ2 contact is also closed, the remote control channel test light circuit works, and the monitoring channel is in the remote control self-loop test state. Figure 6 shown.

[0032] The overall operation logic of the present invention is as follows Figure 7 shown.

[0033] The contact on-off rules of the ZK handle are shown in Table 1 below.

[0034] Table 1 ZK handle contact on-off table

[0035]

[0036]

[0037] In summary, when the 101 channel is interrupted, the on-site operator can perform a self-loop test on the 101 channel by turning the ZK (handle) to the manual test part after arriving at the site to determine whether the 101 channel is on or off. The 104 channel centralized control personnel can also perform a remote control test to determine the quality of the 101 channel, thereby reducing the troubleshooting time and greatly improving the safe and stable operation capability of the power grid. It is of great significance to build a conservation-oriented society, an environmentally friendly power grid, and improve the product design and manufacturing level of my country's power industry.

[0038] The embodiments of the present invention are described in detail above, but the contents are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the scope of the present invention shall be included in the protection scope of the present invention.

Claims

1. 101 channel self-loop test box, characterized in that: At least two self-loop lines are connected between the sending line and the receiving line from the remote control device to the monitoring main station. A controller for controlling its on and off is provided on one of the self-loop lines, and a physical handle is provided on the controller. An intermediate relay for controlling its on and off is provided on the other self-loop line, and the intermediate relay responds to remote control instructions.

2. The 101-channel self-loop test box according to claim 1, characterized in that: The intermediate relay responds to the remote control instruction through the remote control device.

3. The 101-channel self-loop test box according to claim 1, characterized in that: At least two contacts are arranged on the controller, one of which is located on one of the self-loop lines, and the other is located on the power supply circuit of the manual test status monitoring light. When the handle is triggered, the two contacts are connected.

4. The 101-channel self-loop test box according to claim 3, characterized in that: At least four contacts are provided on the controller, the third contact is located on the sending line or the receiving line from the remote control device to the monitoring main station, and the fourth contact is located on the power supply circuit of the normal operating status monitoring light. When the handle is not triggered, the third contact and the fourth contact are connected.

5. The 101-channel self-loop test box according to claim 1, characterized in that: At least two contacts are provided on the intermediate relay, one of which is located on the other self-loop line, and the other is located on the power supply circuit of the remote control test status monitoring light. When the intermediate relay is triggered in response to the remote control command, the two contacts are connected.

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