Intelligent power grid control system and control method thereof

Abstract

The invention relates to the technical field of intelligent power grids, in particular to an intelligent power grid control system and a control method thereof. The intelligent power grid control system comprises a plurality of nodes, wherein each node is connected through a network and is used for adjusting the state and behavior of the network according to the change of time; the time sensing module is used for dividing the network into a plurality of time slots, and each time slot has a specific task; the operation control module is used for adjusting the operation state of the network according to the power demand and the system state; the time synchronization module is used for ensuring time synchronization of all nodes; the monitoring module is used for monitoring the network state and the equipment operation condition in real time; the data recording module is used for recording historical data and performing data analysis and optimization based on the operation control module; according to the invention, in a power transmission network, the accuracy of network performance is ensured through accurate time synchronization.

Description

Technical Field

[0001] The present invention relates to the technical field of smart grids, and in particular to a smart grid control system and a control method thereof. Background Art

[0002] As the complexity and scale of power systems continue to increase, the performance requirements for power transmission networks are also getting higher and higher. Traditional power networks face many challenges in large-scale power transmission, load balancing, fault detection, etc.

[0003] Traditional Ethernet has major limitations, such as low time synchronization accuracy: Traditional Ethernet time synchronization technology (such as NTP) has low accuracy and cannot meet the nanosecond time synchronization requirements in industrial applications; large transmission delay: Traditional Ethernet is prone to delays and packet loss when transmitting large amounts of data, affecting the real-time and reliability of the system; lack of determinism: Traditional Ethernet lacks a deterministic data transmission mechanism, making it difficult to ensure that data arrives at the designated node within the scheduled time.

[0004] A smart grid control system disclosed in publication number CN104993585A can measure the electrical and non-electrical data of residential users, industrial and commercial users and distributed energy sources in real time through the cloud service of the smart grid control system, grasp the operating status of the smart grid at any time, and conduct centralized statistical analysis of the data to facilitate the two-way scheduling of smart electricity consumption. However, in terms of time synchronization, any slight time deviation may lead to large-scale power loss or instability of the power system.

[0005] Therefore, it becomes particularly important to develop a smart grid system that can accurately control time synchronization. Summary of the invention

[0006] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art, provide a smart grid control system and a control method thereof, so as to solve the problems existing in the existing power transmission network, such as accuracy, rapid fault monitoring and protection switching, and precise and flexible control of distributed new power grid connection, and enable application scenarios such as intelligent operation and maintenance and smart inspection.

[0007] The technical solution adopted by the present invention to solve the technical problem is: the smart grid control system includes

[0008] Multiple nodes: Each node is connected through a network and is used to adjust the state and behavior of the network according to changes in time;

[0009] Time-aware module: used to divide the network into multiple time slots, each of which has a specific task;

[0010] Operation control module: used to adjust the operation status of the network according to power demand and system status;

[0011] Time synchronization module: used to ensure time synchronization of all nodes;

[0012] Monitoring module: used to monitor network status and equipment operation in real time;

[0013] Data recording module: used to record historical data and perform data analysis and optimization based on the operation control module.

[0014] The nodes include

[0015] Host node: located in the center, responsible for the management and control of the overall network;

[0016] Slave nodes: distributed in various equipment locations in the power network;

[0017] The host node and the slave node are connected through a communication network module, and the communication network module supports high-speed data transmission.

[0018] The time perception module divides the network into at least 5 time slots, time slot 1 is used for load balancing, time slot 2 is used for fault detection, time slot 3 is used for power scheduling, time slot 4 is used to start the energy-saving mode, and time slot 5 is used for the high-performance mode.

[0019] The operation control module adjusts the system based on the time slot to operate in the optimal way at any time point; for example, the network state is adjusted to energy-saving mode when the power demand is low, and the network state is adjusted to high-performance mode when the power demand is high; the system relies on control strategies such as load balancing, frequency control, voltage control, etc. to achieve precise control of the power system.

[0020] The time synchronization module includes the following steps when running:

[0021] The host node sends a time synchronization signal;

[0022] Receive time synchronization signals from the nodes and correct the local clock;

[0023] Feedback time synchronization confirmation signal from the node;

[0024] The host node further corrects the time synchronization according to the fed-back time synchronization confirmation signal.

[0025] The time synchronization module of this application ensures that the time signal received by each node is accurate through the Precision Time Protocol (PTP).

[0026] The entire system of the present application relies on network communication technology, including Ethernet technology at the physical layer, scheduling algorithms at the MAC layer, and routing protocols at the network layer to ensure fast and stable transmission of control signals.

[0027] Through precise time synchronization and scheduling, it is ensured that each node receives the same control signal at the same time, thereby achieving precise control; the system can realize remote monitoring and management of the entire power system through real-time network communication, thereby improving the flexibility and response speed of the power system.

[0028] The operation control module includes a fault monitoring and protection switching unit, a power grid connection unit, and an intelligent operation and maintenance inspection unit.

[0029] The fault monitoring and protection switching unit receives the heartbeat signal sent periodically by the device during operation. When a device fails, the heartbeat signal is interrupted. If the fault monitoring and protection switching unit detects that the heartbeat signal is interrupted, the fault detection program is started to determine the faulty device. The host node sends an instruction to switch to the backup device, and the backup device takes over the operation task and resumes operation.

[0030] When a device fails, the system can quickly detect the failure and switch to the backup device within a predetermined time, avoiding failure delays and system downtime.

[0031] When the power grid-connected unit is in operation, the same control signal is sent based on the renewable resources generated by each node (such as a wind farm, a solar power station, etc.) to schedule the power generation of each node. The present application is based on precise time synchronization to ensure that each node receives the same control signal at the same time, and schedules the power generation of each node according to power demand and system status. The present application realizes precise and flexible control of new distributed power grid connection, and is suitable for centralized and decentralized management and control of renewable energy sources such as wind power and solar energy.

[0032] The intelligent operation and maintenance inspection unit monitors various equipment in the power grid (such as substations, power distribution equipment, etc.) in real time based on precise time synchronization and delay control, controls and dispatches equipment based on monitoring data, and locates faults of power grid equipment based on remote control and performs early warning maintenance. The intelligent operation and maintenance inspection unit records the historical data of the equipment for analysis and optimization.

[0033] The control method applied to the above-mentioned smart grid control system comprises the following steps:

[0034] S1: Initialize the network and set multiple time slots, each with a specific task;

[0035] S2: Control the time synchronization of all nodes;

[0036] S3: Obtain power demand to dynamically adjust the network state and determine the control strategy; for example, when power demand is low, the network state is adjusted to energy-saving mode, and when power demand is high, the network state is adjusted to high-performance mode to achieve optimal energy utilization efficiency;

[0037] S4: Control the power system according to the determined control strategy;

[0038] S5: Monitor the operation of the equipment in real time, perform maintenance and inspections, and issue an early warning and switch to backup equipment if a device fails.

[0039] The control strategy in S3 includes:

[0040] Load balancing strategy: Dynamically adjust the power distribution in different areas to ensure uniform load distribution in the power system; this strategy is suitable for the demand for uniform load distribution in the power system to avoid local overload.

[0041] Frequency control strategy: adjust the output power of the generator to keep the grid frequency within the standard range; this strategy is suitable for maintaining the stability of the grid frequency and ensuring the normal operation of the power system.

[0042] Voltage control strategy: adjust the tap position of the transformer to keep the grid voltage within the standard range. This strategy is suitable for maintaining the stability of the grid voltage and ensuring the safe operation of the power system.

[0043] This application can be used for the intelligent upgrade and transformation of existing power grids, and to improve the level of intelligence of power system grid communications; the system establishes and improves an ultra-low latency network system with time-clear characteristics from the three levels of "network-device-data".

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] This application solves the accuracy network performance requirements of the power transmission network. In the power transmission network, the accuracy of network performance is guaranteed by accurate time synchronization. By introducing a time-aware mechanism, the network is divided into multiple time slots, each of which has a specific task, and the state and behavior of the network are adjusted according to the change of time. This method can ensure that the network can operate in the optimal way at any time point.

[0046] The present application can perform fast fault monitoring and protection switching, and synchronize all devices in the network based on accurate time information. This synchronization enables devices to perform specific tasks at a predetermined time, thereby improving the efficiency and reliability of the network. In the power system, it can be used for fast fault monitoring and protection switching. For example, when a device fails, the fault can be quickly detected and switched to a backup device within a predetermined time, thereby avoiding delays in the fault and system downtime. At the same time, it can also help power personnel have a more accurate understanding of the status of the system. For example, you can know exactly when a fault occurred and how long the fault lasted.

[0047] This application realizes the precise and flexible control of distributed new power grid connection. Distributed new power grid connection refers to the centralized and decentralized management and control of various renewable energy sources such as wind power and solar energy through the power grid. Its characteristics are that the generation and consumption of energy are distributed at various nodes, and a high degree of precise control and coordination are required to ensure the stable operation of the power system. Through precise time synchronization and scheduling, this application can ensure that each node receives the same control signal at the same time, thereby achieving precise control. In addition, it can also realize remote monitoring and management of the entire power system through real-time network communication, thereby improving the flexibility and response speed of the power system.

[0048] This application can ensure the accuracy and stability of network data transmission through clear time management and scheduling, thereby achieving high performance of the network. It can not only provide efficient data transmission, but also reduce the possibility of data loss and delay. Through clear time management, the network can be quickly protected. It can not only prevent network attacks, but also quickly restore and maintain the network when problems occur. Through clear time management, the operation and maintenance of the network can also be carried out accurately. It can ensure the stable operation of the network and reduce the possibility of network problems.

[0049] This application improves the operating efficiency of the power system and reduces energy waste through optimized scheduling and precise control. It reduces the impact of faults on the power system and reduces maintenance costs through rapid fault detection and protection switching. It improves the safety of the power system and reduces the occurrence of safety accidents through real-time monitoring and remote control.

[0050] This application improves the efficient two-way interactive capability of the new power system grid, promotes the widespread application of renewable energy, and promotes the optimization of energy structure. It also reduces carbon emissions and promotes environmental protection by improving energy utilization efficiency and reducing failures. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] Smart grid control systems include

[0055] Multiple nodes: Each node is connected through a network and is used to adjust the state and behavior of the network according to changes in time;

[0056] Time-aware module: used to divide the network into multiple time slots, each of which has a specific task;

[0057] Operation control module: used to adjust the operation status of the network according to power demand and system status;

[0058] Time synchronization module: used to ensure time synchronization of all nodes;

[0059] Monitoring module: used to monitor network status and equipment operation in real time;

[0060] Data recording module: used to record historical data and perform data analysis and optimization based on the operation control module.

[0061] The nodes include

[0062] Host node: located in the center, responsible for the management and control of the overall network;

[0063] Slave nodes: distributed in various equipment locations in the power network, such as substations, distribution equipment, etc.;

[0064] The host node and the slave node are connected through a communication network module, and the communication network module supports high-speed data transmission.

[0065] The system can achieve accuracy in the power transmission network and meet network performance requirements.

[0066] The time perception module divides the network into at least 5 time slots. Taking the division of 5 time slots as an example, the tasks of each time slot are as follows:

[0067] Time slot 1 is used for load balancing;

[0068] Time slot 2 is used for fault detection;

[0069] Time slot 3 is used for power dispatching;

[0070] Time slot 4 is used to turn on the energy-saving mode;

[0071] Time slot 5 is used for high performance mode.

[0072] The operation control module adjusts the system based on time slots so that it can operate in the best way at any time point. For example, when the power demand is low, the network state is adjusted to energy-saving mode, and when the power demand is high, the network state is adjusted to high-performance mode.

[0073] In addition, the system relies on control strategies such as load balancing, frequency control, voltage control, etc. to achieve precise control of the power system.

[0074] The time synchronization module includes the following steps when running:

[0075] The host node sends a time synchronization signal;

[0076] Receive time synchronization signals from the nodes and correct the local clock;

[0077] Feedback time synchronization confirmation signal from the node;

[0078] The host node further corrects the time synchronization according to the fed-back time synchronization confirmation signal.

[0079] The time synchronization module of this application ensures that the time signal received by each node is accurate through the Precision Time Protocol (PTP).

[0080] The entire system of the present application relies on network communication technology, including Ethernet technology at the physical layer, scheduling algorithms at the MAC layer, and routing protocols at the network layer to ensure fast and stable transmission of control signals.

[0081] Through precise time synchronization and scheduling, each node is ensured to receive the same control signal at the same time, thus achieving precise control.

[0082] The system can realize remote monitoring and management of the entire power system through real-time network communication, thereby improving the flexibility and response speed of the power system.

[0083] The operation control module includes a fault monitoring and protection switching unit, a power grid connection unit, and an intelligent operation and maintenance inspection unit.

[0084] The operation of the fault monitoring and protection switching unit during operation is as follows:

[0085] Receive heartbeat signals sent periodically by the device;

[0086] When a device fails, the heartbeat signal is interrupted. If the fault monitoring and protection switching unit detects that the heartbeat signal is interrupted, the fault detection program is started to determine the faulty device;

[0087] The host node sends instructions to switch to the backup device, which then takes over the running task and resumes operation.

[0088] When a device fails, the system can quickly detect the failure and switch to the backup device within a predetermined time, avoiding failure delays and system downtime.

[0089] In addition, the system continuously detects faulty equipment and records accurate fault time and duration information, helping power personnel to have a more accurate understanding of the system status.

[0090] The present application realizes fast fault monitoring and protection switching. For example, when a device fails, the fault can be detected quickly and switched to a backup device within a predetermined time, thereby avoiding delays in the failure and system downtime. At the same time, it can also help power personnel have a more accurate understanding of the status of the system. For example, it is possible to accurately know when a fault occurred and how long the fault lasted.

[0091] Through rapid fault detection and protection switching, the impact of faults on the power system is reduced, and maintenance costs are reduced. Through real-time monitoring and remote control, the safety of the power system is improved and the occurrence of safety accidents is reduced.

[0092] When the power grid-connected unit is in operation, the same control signal is sent based on the renewable resources generated by each node (such as a wind farm, a solar power station, etc.) to schedule the power generation of each node. The present application is based on precise time synchronization to ensure that each node receives the same control signal at the same time, and schedules the power generation of each node according to power demand and system status. The present application realizes precise and flexible control of new distributed power grid connection, and is suitable for centralized and decentralized management and control of renewable energy sources such as wind power and solar energy.

[0093] This application can ensure that each node receives the same control signal at the same time through precise time synchronization and scheduling, thereby achieving precise control. In addition, it can also achieve remote monitoring and management of the entire power system through real-time network communication, improving the flexibility and response speed of the power system.

[0094] The intelligent operation and maintenance inspection unit monitors various equipment in the power grid (such as substations, power distribution equipment, etc.) in real time based on precise time synchronization and delay control, controls and dispatches equipment based on monitoring data, and locates faults of power grid equipment based on remote control and performs early warning maintenance. The intelligent operation and maintenance inspection unit records the historical data of the equipment for analysis and optimization.

[0095] The system enables intelligent operation and maintenance, and realizes precise scheduling and control of power grid equipment through precise time synchronization and delay control; the system can realize real-time monitoring and precise control of various equipment in the power grid (such as substations, distribution equipment, etc.), and improve the operation and maintenance efficiency and accuracy of the power grid; the system can realize remote control and fault location of power grid equipment through precise time synchronization, and improve the stability and security of the power grid.

[0096] The system enables intelligent inspections and achieves real-time monitoring and early warning of power grid equipment through precise time synchronization and delay control; the system can achieve real-time monitoring of the status of power grid equipment (such as substations, distribution equipment, etc.), promptly discover equipment abnormalities, and provide early warnings or repairs to avoid equipment failures; the system can achieve accurate recording of historical data of power grid equipment through precise time synchronization, providing data support for the maintenance and optimization of power grid equipment.

[0097] The control method applied to the above-mentioned smart grid control system comprises the following steps:

[0098] S1: Initialize the network and set multiple time slots, each with a specific task;

[0099] S2: Control the time synchronization of all nodes;

[0100] S3: Obtain power demand to dynamically adjust the network state and determine the control strategy; for example, when power demand is low, the network state is adjusted to energy-saving mode, and when power demand is high, the network state is adjusted to high-performance mode to achieve optimal energy utilization efficiency;

[0101] The control strategy in S3 includes:

[0102] Load balancing strategy: Dynamically adjust the power distribution in different areas to ensure uniform load distribution in the power system; this strategy is suitable for the demand for uniform load distribution in the power system to avoid local overload.

[0103] Frequency control strategy: adjust the output power of the generator to keep the grid frequency within the standard range; this strategy is suitable for maintaining the stability of the grid frequency and ensuring the normal operation of the power system.

[0104] Voltage control strategy: adjust the tap position of the transformer to keep the grid voltage within the standard range. This strategy is suitable for maintaining the stability of the grid voltage and ensuring the safe operation of the power system.

[0105] S4: Control the power system according to the determined control strategy;

[0106] S5: Monitor the operation of the equipment in real time, perform maintenance and inspections, and issue an early warning and switch to backup equipment if a device fails.

[0107] This application can be used for the intelligent upgrade and transformation of existing power grids, and to improve the level of intelligence of power system grid communications; the system establishes and improves an ultra-low latency network system with time-clear characteristics from the three levels of "network-device-data".

[0108] This application has many significant advantages, including improving network performance and accuracy, fast fault detection and protection switching, realizing accurate control of distributed new power grid connection, improving the efficiency of intelligent operation and maintenance and intelligent inspection, improving the overall performance, economic and social benefits of the power system, and promoting technological innovation and industrial upgrading. These advantages not only improve the operating efficiency and safety of the power system, but also provide strong support for the sustainable development of the power industry.

[0109] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the present invention specification under the inventive concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A smart grid control system, characterized in that: include Multiple nodes: Each node is connected through a network and is used to adjust the state and behavior of the network according to changes in time; Time-aware module: used to divide the network into multiple time slots, each of which has a specific task; Operation control module: used to adjust the operation status of the network according to power demand and system status; Time synchronization module: used to ensure time synchronization of all nodes; Monitoring module: used to monitor network status and equipment operation in real time; Data recording module: used to record historical data and perform data analysis and optimization based on the operation control module.

2. The smart grid control system according to claim 1, characterized in that: The nodes include Host node: located in the center, responsible for the management and control of the overall network; Slave nodes: distributed in various equipment locations in the power network; The host node and the slave node are connected through a communication network module.

3. The smart grid control system according to claim 2, characterized in that: The time perception module divides the network into at least 5 time slots, time slot 1 is used for load balancing, time slot 2 is used for fault detection, time slot 3 is used for power scheduling, time slot 4 is used to start the energy-saving mode, and time slot 5 is used for the high-performance mode.

4. The smart grid control system according to claim 2, characterized in that: The time synchronization module includes the following steps when running: The host node sends a time synchronization signal; Receive time synchronization signals from the nodes and correct the local clock; Feedback time synchronization confirmation signal from the node; The host node further corrects the time synchronization according to the fed-back time synchronization confirmation signal.

5. The smart grid control system according to claim 2, characterized in that: The operation control module includes a fault monitoring and protection switching unit, a power grid connection unit, and an intelligent operation and maintenance inspection unit.

6. The smart grid control system according to claim 5, characterized in that: The fault monitoring and protection switching unit receives the heartbeat signal sent periodically by the device during operation. If the heartbeat signal is detected to be interrupted, the fault detection program is started to determine the faulty device. The host node sends an instruction to switch to the backup device, which takes over the operation task and resumes operation.

7. The smart grid control system according to claim 5, characterized in that: When the power grid-connected unit is in operation, the same control signal is sent based on the renewable resources generated by each node to schedule the power generation of each node.

8. The smart grid control system according to claim 5, characterized in that: The intelligent operation and maintenance inspection unit monitors various devices in the power grid in real time based on precise time synchronization and delay control, controls and dispatches devices according to monitoring data, locates faults of power grid equipment, and performs early warning maintenance.

9. A control method for a smart grid control system according to any one of claims 1 to 8, characterized in that: The steps include: S1: Initialize the network and set multiple time slots, each with a specific task; S2: Control the time synchronization of all nodes; S3: Obtain power demand to dynamically adjust network status and determine control strategy; S4: Control the power system according to the determined control strategy; S5: Monitor the operation of the equipment in real time, perform maintenance and inspections, and issue an early warning and switch to backup equipment if a device fails.

10. The smart grid control method according to claim 9, characterized in that: The control strategy in S3 includes: Load balancing strategy: Dynamically adjust power distribution in different areas to ensure uniform load distribution in the power system; Frequency control strategy: adjust the output power of the generator to keep the grid frequency within the standard range; Voltage control strategy: Adjust the tap position of the transformer to keep the grid voltage within the standard range.