Grounding wiring network with grounding wire monitoring sub-network

Abstract

The application provides a ground routing network with a ground wire monitoring sub-network, comprising: a device ground routing sub-network for connecting a plurality of device ground nodes; the grounding wiring monitoring sub-network is used for connecting a plurality of monitoring nodes, and each monitoring node corresponds to one equipment grounding node in the equipment grounding wiring sub-network and is arranged to be close to the corresponding equipment grounding node; the equipment grounding wiring sub-network and the grounding wiring monitoring sub-network are electrically conducted and connected only through two points of a reliable grounding end located at a far end; the monitoring nodes are configured to judge the conduction condition of the grounding wiring network by measuring the connectivity or resistance between the monitoring nodes and the corresponding equipment grounding nodes.

Description

Technical Field

[0001] This application belongs to the fields of electrical safety and power systems, and generally relates to a grounding wiring network. Background Art

[0002] Equipment grounding is one of the important measures for electrical safety and the normal operation of power systems. Its main functions include safety protection, voltage stabilization, interference reduction, lightning protection, system reliability improvement, signal reference, corrosion prevention, fault location, static electricity discharge, etc.

[0003] Currently, there are usually the following ways to detect the grounding condition.

[0004] ① Periodically verify the grounding resistance of the grounding point, with a period of about half a year or one year.

[0005] ② For occasions where grounding is relatively important, use real-time on-line monitoring equipment for grounding resistance to monitor the grounding resistance condition in real time.

[0006] The implementation principles of real-time monitoring equipment for grounding resistance usually include non-contact on-line testing of grounding resistance and contact on-line testing of grounding resistance. The principle of non-contact is to measure the grounding resistance of the grounding loop through the principle of current transformers. The grounding resistance to be measured needs to form a loop, or an auxiliary lead is used to form a loop. The resistance measurement range is usually about 0.01Ω - 200Ω. The contact on-line detector for grounding resistance measures the resistance between the equipment grounding point and the remote grounding point through the principle of the two-wire, three-wire or four-wire method.

[0007] Generally speaking, the above two types of real-time on-line monitoring equipment for grounding resistance are relatively large in volume, and they are additional equipment independent of functional equipment. If each functional equipment is equipped with a real-time on-line monitor for grounding resistance, it will occupy a large volume. If it is a wired measurement, each device also needs to be equipped with a wire connected to the remote grounding point.

[0008] In the work area, if there are many devices, the ground wire network is relatively complex, and there are many connection points between the ground wire networks, it is very easy to have the situation of breakage and loosening. In these occasions, the size of the grounding resistance is not the main concern, but whether the ground wire is disconnected is the primary problem that needs to be monitored.

[0009] In the anti-static field, a very typical working scenario is the table mat of the anti-static workbench, the anti-static wristband jack, the wristband continuous monitor, etc. If the ground wire breaks during use, it will not play the role of static electricity discharge.

[0010] In some application scenarios with relatively high requirements, such as signal ground and anti-static ground, etc., which need to maintain continuous connection, the method of periodic verification cannot detect the fault of ground wire disconnection in time. Although the contact type real-time on-line monitoring device for grounding resistance can achieve real-time monitoring, the test requires additional connection of test wires. Each test point adds test wires, and the measurement is carried out based on the principle of two-wire, three-wire or four-wire method. Especially when it is necessary to connect to the remote ground point, the connection wires will be very long. Although the non-contact type real-time on-line monitoring device for grounding resistance does not require wire connection, it is impossible to monitor the grounding resistance of the ground wire that does not form a loop, unless additional auxiliary test wires for connecting to the remote ground point are added. Summary of the Invention

[0011] In view of the situation that the grounding wire network may have problems such as loose connection points and broken grounding wires, which may lead to equipment grounding failure, the present invention provides a grounding wire network. Outside the original grounding network, a monitoring network is added, and these two networks are connected at the reliable ground point at the remote end. A grounding monitoring point is set at the position of each grounding point, so that the grounding condition of the equipment can be detected or on-line monitored by measuring the resistance or conductivity between the grounding point and the monitoring point. And according to the monitoring results of each monitoring node, the grounding wire connection fault can be assisted in diagnosis and location.

[0012] The present application provides a grounding wiring network, including:

[0013] An equipment grounding wiring sub-network for connecting multiple equipment grounding nodes;

[0014] A grounding wiring monitoring sub-network for connecting multiple monitoring nodes. Each monitoring node corresponds to an equipment grounding node in the equipment grounding wiring sub-network and is set to be adjacent to the corresponding equipment grounding node;

[0015] The equipment grounding wiring sub-network and the grounding wiring monitoring sub-network are electrically connected only through two points at the reliable grounding end located at the remote end;

[0016] The monitoring node is configured to: judge the conduction condition of the grounding wiring network by measuring the connectivity or resistance between the monitoring node and the corresponding equipment grounding node.

[0017] In at least one embodiment, the equipment grounding wiring sub-network and the grounding wiring monitoring sub-network are not conductively connected at other nodes except at the reliable grounding end.

[0018] In at least one embodiment, the reliable grounding end is a grounding copper bar.

[0019] In at least one embodiment, the grounding wire connection fault is diagnosed and located by measuring the connectivity or resistance between the monitoring node and the corresponding equipment grounding node.

[0020] In at least one embodiment, the device grounding wiring sub-network is composed of bare copper bars.

[0021] In at least one embodiment, the grounding wiring monitoring sub-network uses wires with insulating sheaths and leads out measurable interfaces at the monitoring nodes.

[0022] In at least one embodiment, the monitoring nodes are configured to be able to monitor the ground wire connection status in real time through a digital multimeter or an on-line ground resistance tester.

[0023] This application also provides a method for monitoring a grounding wiring network. By measuring the connectivity or resistance between the monitoring nodes and the corresponding device grounding nodes, the conduction status of the grounding wiring network is judged.

[0024] In at least one embodiment, the ground wire connection status is monitored in real time through a digital multimeter or an on-line ground resistance tester.

[0025] In at least one embodiment, the ground wire connection faults are diagnosed and located based on the test results of the monitoring nodes.

[0026] Compared with the periodic verification and real-time on-line monitoring equipment for ground resistance, the present invention adds a monitoring network on the original grounding network. By measuring the resistance or conductivity between the grounding points and the monitoring points, users or maintenance personnel can easily understand the grounding status. It can be used in places with high grounding requirements to monitor the ground wire in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above features, technical features, advantages and implementation manners of the present application will be further described below in a clear and understandable manner through the description of the preferred embodiments in combination with the drawings. The following drawings are only intended to illustrate and explain the present application schematically and do not limit the scope of the present application. Among them:

[0028] Figure 1 Shows a schematic diagram of the grounding wiring network provided by the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] For a clearer understanding of the technical features, purposes and effects of the present application, the specific embodiments of the present application will now be described with reference to the drawings.

[0030] As Figure 1 shown, the grounding wiring network provided by the present application includes:

[0031] A device grounding wiring sub-network that connects multiple device grounding nodes (G_1A, G_2A, G_3A, etc.);

[0032] The grounding wiring monitoring sub-network is connected to multiple monitoring nodes (such as G_1B, G_2B, G_3B, etc.). Each monitoring node corresponds to a device grounding node in the device grounding wiring sub-network and is set to be adjacent to the corresponding device grounding node.

[0033] The device grounding wiring sub-network and the grounding wiring monitoring sub-network are electrically connected only through two points of a reliable grounding end (grounding copper bar) located at the far end. The device grounding wiring sub-network and the grounding wiring monitoring sub-network have no conductor connection at other nodes except at the reliable grounding end.

[0034] By measuring the connectivity or resistance between the monitoring node and the corresponding device grounding node, the conduction status of the grounding wiring network can be judged. If there is a situation where the ground wire is interrupted somewhere, the ground wire connection fault can also be diagnosed and located through the test results of these monitoring nodes.

[0035] The device grounding wiring sub-network can be an exposed copper bar. During the laying process of the grounding wiring monitoring sub-network, insulated-sheath wires need to be used, and interfaces for measurement are led out at the monitoring nodes.

[0036] Through the monitoring nodes, a digital multimeter or an on-line grounding resistance tester can be used to monitor the ground wire connection status in real time. Or the grounding electrode of the device and the monitoring node are introduced into the device or appliance that needs to be grounded, and a circuit is designed to on-line monitor the conductivity or the magnitude of the resistance between these two points to realize on-line monitoring of the ground wire connection status.

[0037] The present invention proposes a new type of grounding wiring network mode. The remarkable feature of this network is that it includes two sets of networks, one is the device grounding wiring sub-network, and the other is the grounding wiring monitoring sub-network. These two networks are connected only at two points of the reliable grounding point at the far end. By measuring or on-line monitoring the grounding nodes and the monitoring nodes, the connection status of the grounding network is judged.

[0038] By using the grounding wiring monitoring sub-network, it is possible to on-line monitor whether the device grounding wiring sub-network is intact. By using the monitoring results of each monitoring node in the grounding wiring monitoring sub-network, it is possible to assist in diagnosing and locating the occurring ground wire connection faults.

[0039] It should be understood that although this specification is described according to each embodiment, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0040] The above is only a schematic specific implementation manner of the present application and is not intended to limit the scope of the present application. Any equivalent changes, modifications and combinations made by those skilled in the art without departing from the concept and principle of the present application shall fall within the scope of protection of the present application.

Claims

1. A grounding wiring network, comprising: A device grounding wiring sub-network for connecting multiple device grounding nodes; A grounding wiring monitoring sub-network for connecting multiple monitoring nodes, each monitoring node corresponding to a device grounding node in the device grounding wiring sub-network and being arranged adjacent to the corresponding device grounding node; The device grounding wiring sub-network and the grounding wiring monitoring sub-network are electrically connected only through two points at the reliable grounding end located at the far end; The monitoring node is configured to: judge the conduction status of the grounding wiring network by measuring the connectivity or resistance between the monitoring node and the corresponding device grounding node.

2. The grounding wiring network according to claim 1, wherein, The device grounding wiring sub-network and the grounding wiring monitoring sub-network are not conductively connected at all other nodes except at the reliable grounding end.

3. The grounding wiring network according to claim 1, wherein The reliable grounding end is a grounding copper bar.

4. The grounding wiring network according to claim 1, wherein, Diagnose and locate the ground wire connection fault by measuring the connectivity or resistance between the monitoring node and the corresponding device grounding node.

5. The grounding wiring network according to claim 1, wherein, The device grounding wiring sub-network is composed of bare copper bars.

6. The grounding wiring network according to claim 1, wherein, The grounding wiring monitoring sub-network uses a wire with an insulating outer sheath and leads out a measurable interface at the monitoring node.

7. The grounding wiring network according to claim 1, wherein, The monitoring node is configured to: be able to monitor the ground wire connection status in real time through a digital multimeter or an on-line ground resistance tester.

8. A monitoring method for the grounding wiring network according to claim 1, judging the conduction status of the grounding wiring network by measuring the connectivity or resistance between the monitoring node and the corresponding device grounding node.

9. The monitoring method according to claim 1, monitoring the ground wire connection status in real time through a digital multimeter or an on-line ground resistance tester.

10. The monitoring method according to claim 1, diagnosing and locating the ground wire connection fault through the test results of the monitoring node.

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