A Power Grid Monitoring and Early Warning System

Abstract

The present invention relates to the field of power grid early warning technology, and in particular to a power grid monitoring and early warning system, comprising: a plurality of monitors of different categories; a basic server, which is used to determine the basic working state of a corresponding line section according to a power change and a stress state; an integrated server, which is used to activate a corresponding environmental monitor according to the basic working state of each line section, and generate an environmental state of the corresponding line section; an emergency server, which is used to determine the operating state of the corresponding line according to the basic working state and the environmental state, and issue a corresponding early warning according to the operating state; the present invention determines the impact of the power grid on the environment according to whether the cable is dragged on the ground or whether the bracket is tilted, and while effectively improving the monitoring accuracy of the power grid through the environment The impact of the power grid is reduced while reducing the risk of fire, thereby effectively improving the sensitivity of power grid monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid early warning, and in particular to a power grid monitoring and early warning system. Background Art

[0002] With the continuous development of intelligent and information technology, the power grid monitoring and early warning system will further enhance its monitoring and data processing capabilities. The power grid early warning system can timely detect the potential failure risks of power equipment and send early warning signals so that repair measures can be taken in time to avoid the impact of failures on power supply.

[0003] Chinese patent application number: CN202410314265.2 discloses a power monitoring and early warning system and method based on data fusion. The power monitoring and early warning system includes a display terminal and a data integration system for accessing and processing power platform data. The data integration system includes a gateway layer, a service layer, a data access layer and a storage layer. By integrating relevant data such as a data center platform, a data asset management platform, an intelligent platform, a power grid management platform, and a customer service platform, data fusion is achieved, and power production safety management and marketing management business early warnings are realized, thereby improving the operational efficiency, safety and customer service quality of the power industry.

[0004] However, the above method has the following problems: it is difficult to conduct effective environmental monitoring on the power grid path, and thus it is impossible to identify the risks brought by the environment on the power grid path. Summary of the invention

[0005] To this end, the present invention provides a power grid monitoring and early warning system to overcome the problem in the prior art that it is difficult to perform effective environmental monitoring on the power grid path, thereby failing to identify the risks brought by the environment on the power grid path.

[0006] To achieve the above object, the present invention provides a power grid monitoring and early warning system, comprising:

[0007] The power grid to be monitored is set as a number of power grid nodes and the power grid is divided into a number of line sections based on each power grid node, and the corresponding early warning system is configured on the power grid to be monitored;

[0008] A plurality of node monitors arranged at each of the grid nodes for monitoring the power variation of the grid nodes;

[0009] A number of line monitors are arranged in each line section to monitor the stress state of the power grid line during operation;

[0010] A plurality of environmental monitors arranged at protruding points on the ground for monitoring the impact of the power grid line on the environment;

[0011] A basic server, which is connected to each node monitor and each line monitor, and is used to determine the basic working state of the corresponding line section according to the power change amount and the stress state;

[0012] An integrated server connected to the basic server and the environmental monitor, configured to activate the corresponding environmental monitor according to the basic working state of each line section and generate the environmental state of the corresponding line section;

[0013] An emergency server, connected to the basic server and the integrated server, for determining the operation status of the corresponding line according to the basic working status and the environmental status, and issuing a corresponding warning according to the operation status;

[0014] The grid nodes include transformer equipment, power transformer equipment and connection points of transmission lines;

[0015] There are constraints at both ends of the line section, but no constraints in the middle of the line;

[0016] The stress state includes an axial stress state and a tangential stress state.

[0017] Furthermore, the grid nodes are arranged in accordance with the line laying path of the grid, and are marked in order from the power transmission end to the power consumption end, and any adjacent grid nodes form a line unit with an input end, an output end and a line section;

[0018] For any line unit, whether a corresponding environmental monitor is set in the line section is determined according to the shortest distance between the corresponding line section and the ground;

[0019] If the closest distance is not greater than a closest distance threshold, the environmental monitor is set on the ground at the closest distance.

[0020] Furthermore, the environmental monitor is also arranged at the connection between the corresponding line section and the output end when the angle between the direction of the output end perpendicular to the horizontal plane and the normal vector of the corresponding ground is not less than a preset angle threshold.

[0021] Furthermore, the environmental monitor comprises:

[0022] A ground contact monitoring group, which is arranged on a preset ground surface, is used to monitor the influence of the line section cables on the corresponding ground surface of the line section;

[0023] The node damage monitoring group is arranged at the contact position between the preset line section and the corresponding grid node, and is used to monitor the influence of the grid node on the corresponding ground of each grid node.

[0024] Furthermore, the integrated server is provided with corresponding cable drop strategy and environmental fluctuation strategy according to the climate;

[0025] The ground contact monitoring group works when the cable drop strategy is triggered;

[0026] The node damage monitoring group operates when the environmental fluctuation strategy is triggered.

[0027] Furthermore, the integrated server is provided with a high temperature trigger value, a low temperature trigger value and a wind force trigger value.

[0028] If the ambient temperature is not less than the high temperature trigger value, the integrated server activates the cable dropping strategy;

[0029] If the ambient temperature is not greater than the low temperature trigger or not less than the wind force trigger value, the integrated server activates the environmental fluctuation strategy;

[0030] The high temperature trigger value is the temperature corresponding to the cable falling to the nearest distance threshold in any line section;

[0031] The low temperature trigger value is the temperature corresponding to the freezing of the cable;

[0032] The wind trigger value is related to the resonant frequency of the cable node.

[0033] Furthermore, the integrated server also activates the cable drop strategy and / or environmental fluctuation strategy according to the basic working state, and the integrated server is provided with a power change threshold, a tangential force threshold and an axial force threshold corresponding to the line unit;

[0034] When the basic working state of any line unit reaches the power change threshold,

[0035] The integrated server activates the environmental fluctuation strategy when the axial force corresponding to the corresponding power grid line reaches the axial force threshold, or activates the cable dropping strategy when the tangential force corresponding to the corresponding power grid line reaches the axial force threshold.

[0036] Further, the environmental monitor monitors whether the cable of the corresponding power grid line contacts the corresponding ground in response to the cable drop strategy, and issues cable drop information when the power grid line contacts the ground, or,

[0037] In response to the environmental fluctuation strategy, the structural swing amplitude of the corresponding power grid node is monitored, and environmental damage information is issued when the power grid node shakes.

[0038] Further, the emergency server determines the corresponding line unit in response to the cable drop information, and sends a corresponding cable drop warning according to the basic working state and the environmental state of the line unit, or,

[0039] In response to the environmental damage information, a corresponding environmental damage warning is sent.

[0040] Furthermore, the emergency server is also provided with an emergency handling strategy, and when the emergency server issues any type of warning, the operating power of the power grid to be monitored is adjusted to the minimum operating power;

[0041] The minimum operating power is the minimum power required to keep each node monitor, each line monitor, and each environment monitor running.

[0042] Compared with the prior art, the beneficial effect of the present invention lies in that it utilizes a method of dividing the power grid and setting up a number of monitors at the grid nodes to monitor the power changes, stress conditions and distance from the ground of the power grid, and determines the impact of the power grid on the environment according to whether the cable is dragging on the ground or whether the bracket is tilted. While effectively improving the monitoring accuracy of the impact of the power grid on the environment through the power grid, it reduces the risk of fire, thereby effectively improving the sensitivity of power grid monitoring.

[0043] Furthermore, by setting up environmental monitors, the operating status of the power grid is monitored at the ground where the power grid passes or at the position where it contacts the ground, which effectively improves the accuracy of monitoring the environment affecting the power grid and further improves the sensitivity of power grid monitoring.

[0044] Furthermore, dividing the environmental monitors into different functions can effectively save monitoring consumption, and implement corresponding monitoring strategies according to different groups, thereby further improving the sensitivity of power grid monitoring.

[0045] Furthermore, by monitoring temperature and wind speed and initiating different monitoring strategies, the targeted nature of power grid monitoring is effectively improved while effectively avoiding abnormal problems in power grid monitoring due to different environmental conditions, thereby further improving the sensitivity of power grid monitoring.

[0046] Furthermore, by monitoring the fluctuations generated inside the cable due to power changes, it is determined whether the cable has a corresponding impact on the environment, which effectively improves the efficiency of power grid monitoring and further improves the sensitivity of power grid monitoring.

[0047] Furthermore, by responding to information about the impact of the power grid on the environment, the power grid is synchronously adjusted, which effectively reduces the probability of power grid damage and further improves the sensitivity of power grid monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a structural schematic diagram of the power grid monitoring and early warning system of the present invention;

[0049] Figure 2 This is a schematic diagram of power grid segmentation according to an embodiment of the present invention;

[0050] Figure 3 A schematic diagram of the configuration of a node damage monitoring group according to an embodiment of the present invention;

[0051] Figure 4 This is a schematic diagram of the configuration of a ground contact monitoring group according to an embodiment of the present invention;

[0052] Among them: 1, environmental monitor; 2, angle. DETAILED DESCRIPTION

[0053] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0054] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0055] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0056] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] See also Figure 1 As shown, it is a schematic diagram of the structure of the power grid monitoring and early warning system of the present invention, including:

[0058] A plurality of node monitors are arranged at each grid node to monitor the power variation of the grid node;

[0059] A number of line monitors are arranged in each line section to monitor the stress state of the power grid line during operation;

[0060] A number of environmental monitors installed at protruding points on the ground to monitor the impact of power grid lines on the environment;

[0061] A basic server, which is connected to each node monitor and each line monitor, and is used to determine the basic working state of the corresponding line section according to the power change and the stress state;

[0062] An integrated server connected to the basic server and the environmental monitor to activate the corresponding environmental monitor according to the basic working status of each line section and generate the environmental status of the corresponding line section;

[0063] The emergency server is connected to the basic server and the integrated server to determine the operation status of the corresponding line according to the basic working status and environmental status, and issue corresponding warnings according to the operation status;

[0064] Among them, the grid nodes include transformer equipment, substation equipment and connection points of transmission lines;

[0065] There are constraints at both ends of the line section, but no constraints in the middle of the line;

[0066] The stress state includes axial stress state and tangential stress state.

[0067] By dividing the power grid and setting up several monitors at the grid nodes to monitor the power changes, stress conditions and distance from the ground, the impact of the power grid on the environment is determined based on whether the cables are dragging on the ground or whether the brackets are tilted. This effectively improves the monitoring accuracy of the impact of the power grid on the environment and reduces the risk of fire, thereby effectively improving the sensitivity of power grid monitoring.

[0068] In practice, in mountainous areas with abundant forest resources, some cables will be located closer to the ground due to height differences during installation, and the growth of trees in the forest is relatively random. On this basis, cable shaking will cause the cables to rest on tree branches, which in turn will cause the trees to be struck by lightning and cause fires.

[0069] See also Figure 2 As shown, it is a schematic diagram of power grid segmentation according to an embodiment of the present invention. In the figure, the power grid to be monitored is set as a number of power grid nodes and the power grid is divided into a number of line sections based on each power grid node, and the corresponding early warning system is configured on the power grid to be monitored;

[0070] The grid nodes are set according to the line laying path of the grid and marked in order from the power transmission end to the power consumption end. Any adjacent grid nodes form a line unit with input end, output end and line section.

[0071] See also Figure 3 As shown, it is a schematic diagram of the setting of the node damage monitoring group according to an embodiment of the present invention. In the figure, for any line unit, it is determined whether the corresponding environmental monitor 1 is set in the line section according to the shortest distance between the corresponding line section and the ground;

[0072] If the closest distance is not greater than the closest distance threshold, an environmental monitor 1 is set on the ground at the closest distance.

[0073] See also Figure 4 As shown, it is a schematic diagram of the setting of the ground contact monitoring group of an embodiment of the present invention. In the figure, the environmental monitor is also arranged at the connection between the corresponding line section and the output end when the angle 2 between the direction of the output end perpendicular to the horizontal plane and the normal vector of the corresponding ground is not less than a preset angle threshold.

[0074] By setting up environmental monitors, the operating status of the power grid is monitored at the ground where the power grid passes or at the position where it contacts the ground. This effectively improves the accuracy of monitoring the environment that affects the power grid and further improves the sensitivity of power grid monitoring.

[0075] Specifically, environmental monitors include:

[0076] A ground contact monitoring group, which is arranged on a preset ground surface, is used to monitor the influence of the line section cables on the corresponding ground surface of the line section;

[0077] The node damage monitoring group is arranged at the contact position between the preset line section and the corresponding grid node, and is used to monitor the influence of the grid node on the corresponding ground of each grid node.

[0078] Specifically, the integrated server has corresponding cable drop strategies and environmental fluctuation strategies according to the climate;

[0079] The ground contact monitoring team works when the cable drop strategy is triggered;

[0080] The node damage monitoring group works when the environmental fluctuation strategy is triggered.

[0081] Dividing environmental monitors into different functions can effectively save monitoring consumption and implement corresponding monitoring strategies according to different groups, thereby further improving the sensitivity of power grid monitoring.

[0082] Specifically, the integrated server has high temperature trigger value, low temperature trigger value and wind speed trigger value.

[0083] If the ambient temperature is not less than the high temperature trigger value, the integrated server activates the cable drop strategy;

[0084] If the ambient temperature is not greater than the low temperature trigger or not less than the wind force trigger, the integrated server activates the environmental fluctuation strategy;

[0085] The high temperature trigger value is the temperature corresponding to the cable falling to the nearest distance threshold in any line section;

[0086] The low temperature trigger value is the temperature corresponding to the cable freezing;

[0087] The wind trigger value is related to the resonant frequency of the cable node.

[0088] By monitoring temperature and wind speed and initiating different monitoring strategies, the targeted nature of power grid monitoring is effectively improved while effectively avoiding abnormal problems in power grid monitoring due to different environmental conditions, thereby further improving the sensitivity of power grid monitoring.

[0089] Specifically, the integrated server also activates the cable drop strategy and / or environmental fluctuation strategy according to the basic working status, and the integrated server is provided with a power change threshold, a tangential force threshold and an axial force threshold corresponding to the line unit;

[0090] When the basic working state of any line unit reaches the power change threshold, the integrated server starts the environmental fluctuation strategy when the axial force corresponding to the corresponding power grid line reaches the axial force threshold, or starts the cable dropping strategy when the tangential force corresponding to the corresponding power grid line reaches the axial force threshold.

[0091] It can be understood that for a section of cable, due to electromagnetic effects during operation, when the power of the power grid to which the cable belongs changes, the cable will vibrate in the axial and lateral directions, and the amplitude of the vibration is proportional to the change in power;

[0092] In the summer when the outside temperature is high, the cable will stretch a part, and the lateral shaking of the cable will cause the cable to be closer to the ground;

[0093] In winter when the outside temperature is low, the cables will be tight and their elasticity will decrease. At this time, the axial vibration of the cables will cause the structural stability of the fixed equipment at the front and rear ends of the cables to be damaged, such as poles, electrical boxes or transformer piles, which will lead to the risk of tipping over or cable tripping.

[0094] In implementation, the power fluctuation threshold is related to the maximum power that the cable itself can generate, such as:

[0095] For a cable with a maximum power of 270kW, according to its installation route, the power change threshold of the cable can be set as:

[0096] Summer: 120kW; Winter: 180kW.

[0097] It is understandable that the above settings take into account the influence of the specific position of the cable, and different power change thresholds should be set for different cables during the settings.

[0098] By monitoring the fluctuations inside the cable caused by power changes, it is determined whether the cable has a corresponding impact on the environment, which effectively improves the efficiency of power grid monitoring and further improves the sensitivity of power grid monitoring.

[0099] Specifically, the environmental monitor monitors the corresponding power grid line cable in response to the cable drop strategy to monitor whether it contacts the corresponding ground, and sends out cable drop information when the power grid line contacts the ground, or,

[0100] The strategy responding to environmental fluctuations monitors the structural swing amplitude of the corresponding power grid node and sends out environmental damage information when the power grid node shakes.

[0101] Specifically, the emergency server responds to the cable drop information to determine the corresponding line unit, and sends a corresponding cable drop warning according to the basic working status and environmental status of the line unit, or,

[0102] In response to the environmental damage information, a corresponding environmental damage warning is sent.

[0103] Specifically, the emergency server also has an emergency handling strategy. When the emergency server issues any type of warning, the operating power of the power grid to be monitored is adjusted to the minimum operating power;

[0104] The minimum operating power is the minimum power required to keep each node monitor, each line monitor, and each environmental monitor running.

[0105] By responding to information about the impact of the power grid on the environment, the power grid is adjusted synchronously, which effectively reduces the probability of power grid damage and further improves the sensitivity of power grid monitoring.

[0106] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0107] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power grid monitoring and early warning system, characterized in that: include: The power grid to be monitored is set as a number of power grid nodes and the power grid is divided into a number of line sections based on each power grid node, and the corresponding early warning system is configured on the power grid to be monitored; A plurality of node monitors arranged at each of the grid nodes for monitoring the power variation of the grid nodes; A number of line monitors are arranged in each line section to monitor the stress state of the power grid line during operation; A plurality of environmental monitors arranged at protruding points on the ground for monitoring the impact of the power grid line on the environment; A basic server, which is connected to each node monitor and each line monitor, and is used to determine the basic working state of the corresponding line section according to the power change amount and the stress state; An integrated server connected to the basic server and the environmental monitor, configured to activate the corresponding environmental monitor according to the basic working state of each line section and generate the environmental state of the corresponding line section; An emergency server, which is connected to the basic server and the integrated server, is used to determine the operation status of the corresponding line according to the basic working status and the environmental status, and issue a corresponding cable drop warning and / or environmental damage warning according to the operation status; The grid nodes include transformer equipment, power transformer equipment and connection points of transmission lines; There are constraints at both ends of the line section, but no constraints in the middle of the line; The stress state includes an axial stress state and a tangential stress state.

2. The power grid monitoring and early warning system according to claim 1, characterized in that: The grid nodes are arranged in accordance with the line laying path of the grid and are marked in order from the power transmission end to the power consumption end. Any adjacent grid nodes form a line unit with an input end, an output end and a line section. For any line unit, whether a corresponding environmental monitor is set in the line section is determined according to the shortest distance between the corresponding line section and the ground; If the closest distance is not greater than a closest distance threshold, the environmental monitor is set on the ground at the closest distance.

3. The power grid monitoring and early warning system according to claim 2, characterized in that: The environmental monitor is also arranged at the connection between the corresponding line section and the output end when the angle between the direction of the output end perpendicular to the horizontal plane and the normal vector of the corresponding ground is not less than a preset angle threshold.

4. The power grid monitoring and early warning system according to claim 3, characterized in that: The environmental monitor comprises: A ground contact monitoring group, which is arranged on a preset ground surface, is used to monitor the influence of the line section cables on the corresponding ground surface of the line section; The node damage monitoring group is arranged at the contact position between the preset line section and the corresponding grid node, and is used to monitor the influence of the grid node on the corresponding ground of each grid node.

5. The power grid monitoring and early warning system according to claim 4, characterized in that: The integrated server is provided with corresponding cable drop strategy and environmental fluctuation strategy according to the climate; The ground contact monitoring group works when the cable drop strategy is triggered; The node damage monitoring group operates when the environmental fluctuation strategy is triggered.

6. The power grid monitoring and early warning system according to claim 5, characterized in that: The integrated server is provided with a high temperature trigger value, a low temperature trigger value and a wind force trigger value. If the ambient temperature is not less than the high temperature trigger value, the integrated server activates the cable dropping strategy; If the ambient temperature is not greater than the low temperature trigger or not less than the wind force trigger value, the integrated server activates the environmental fluctuation strategy; The high temperature trigger value is the temperature corresponding to the cable falling to the nearest distance threshold in any line section; The low temperature trigger value is the temperature corresponding to the freezing of the cable; The wind force trigger value is related to the resonance frequency of the grid node.

7. The power grid monitoring and early warning system according to claim 5, characterized in that: The integrated server also activates the cable drop strategy and / or environmental fluctuation strategy according to the basic working state, and the integrated server is provided with a power change threshold, a tangential force threshold and an axial force threshold corresponding to the line unit; When the basic working state of any line unit reaches the power change threshold, the integrated server starts the environmental fluctuation strategy when the axial force corresponding to the corresponding power grid line reaches the axial force threshold, or starts the cable dropping strategy when the tangential force corresponding to the corresponding power grid line reaches the axial force threshold.

8. The power grid monitoring and early warning system according to any one of claims 6 or 7, characterized in that: The environmental monitor monitors whether the cable of the corresponding power grid line contacts the corresponding ground in response to the cable droop strategy, and issues cable droop information when the power grid line contacts the ground, or, In response to the environmental fluctuation strategy, the structural swing amplitude of the corresponding power grid node is monitored, and environmental damage information is issued when the power grid node shakes.

9. The power grid monitoring and early warning system according to claim 8, characterized in that: The emergency server determines the corresponding line unit in response to the cable drop information, and sends a corresponding cable drop warning according to the basic working state and the environmental state of the line unit, or, In response to the environmental damage information, a corresponding environmental damage warning is sent.

10. The power grid monitoring and early warning system according to claim 9, characterized in that: The emergency server is also provided with an emergency handling strategy, and when the emergency server issues any type of warning, the operating power of the power grid to be monitored is adjusted to the minimum operating power; The minimum operating power is the minimum power required to keep each node monitor, each line monitor, and each environment monitor running.

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