Intelligent power grid monitoring system

Abstract

The invention discloses an intelligent power grid monitoring system, which comprises a public total power grid center, a reactive voltage control center, a dynamic grouping voltage control center and an intelligent server terminal, and in the public total power grid, voltage is transmitted to users through the reactive voltage control center, the dynamic grouping voltage control center and the intelligent server terminal. Meanwhile, cluster control is carried out, and the control requirement for the new energy high-permeability regional power grid is met. According to the intelligent power grid monitoring system, on the basis of dynamic grouping double-time-sequence multi-resource cooperative reactive voltage control, during voltage transmission, voltage transmission testing and instruction receiving and issuing can be carried out, meanwhile, data are analyzed in real time, and an artificial intelligence online decision technology is carried out on reactive voltage control; cluster dynamic reactive power rapid and accurate group control use can be carried out on an area, and new energy high-permeability power grid reactive power voltage cooperative system processing control is carried out.

Description

Technical Field

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

[0002] With the rapid increase in the penetration rate of renewable energy in regional power grids, problems such as multi-point voltage peaking and frequent fluctuations have become prominent. The risk of local voltage collapse and renewable energy disconnection is increasing sharply. Famous blackouts in Brazil, the United States and Canada were all caused by voltage problems. Existing reactive voltage control means and methods can no longer cope with the control needs of power grids in areas with high penetration of renewable energy. Although the smart grid monitoring system supports a variety of control methods and means, in actual applications, due to technical limitations or cost considerations, it may not be able to provide timely information warning notifications, making it difficult to ensure safe and reliable operation. At the same time, the ability to warn of grid risks is not efficient enough, making the monitoring and management of the entire grid less secure. In order to overcome the above-mentioned defects, prior art 1 (application number CN111260504B, Chinese patent with application date of 2020-02-11) a smart grid monitoring method, system and smart grid monitoring controller, which can obtain the operating status log file of each electrical equipment from the data storage device, and parse the multiple groups of operating parameters included in the operating status log file of each electrical equipment based on the log file parsing process, and then determine the operating condition trajectory of each group of operating parameters of each group of electrical equipment, and then determine the comprehensive failure rate of the target electrical equipment according to the safety factor and operating condition trajectory of each group of operating parameters of each group of electrical equipment; and push warning information to the corresponding electrical equipment when the comprehensive failure rate reaches the set value. In this way, the operating condition trajectory of the electrical equipment can be analyzed, and the risk of failure of the electrical equipment can be effectively reduced by pushing the warning information, thereby ensuring the safe and reliable operation of smart grid monitoring; There is also prior art 2 (publication number CN108336725A, Chinese patent application date 2017-12-18) power grid dispatching equipment monitoring management and intelligent analysis system including power grid dispatching equipment monitoring management system and power system automatic meter reading fault warning system; the power grid dispatching equipment monitoring management system includes equipment monitoring business control center module, equipment comprehensive monitoring center module, signal analysis and disposal center module, equipment reliability analysis center module, equipment online operation status assessment center module. The present invention standardizes the management of various types of monitoring information and conducts comprehensive monitoring. Through the application of equipment abnormal signal analysis, equipment fault reliability analysis, equipment online operation status analysis, etc., it assists the monitor to monitor, warn, analyze and deal with the power grid equipment, thereby improving the monitor's ability to control the power grid operation status and the ability to pre-control the power grid operation risks; And prior art 3 (Chinese patent with publication number CN117856453B and application date of 2024-03-05) smart grid monitoring and management system, including a node marking module, a node network creation module, a first data acquisition module, a first data transmission module, a first data processing module, a first data analysis module and a control management terminal. Different levels of networks are established according to the degree of importance. The control management terminal controls and manages the first-level network. The first-level network manages and controls the node devices of the second-level network. The second-level network manages and controls the node devices of the third-level network. Therefore, the data of each node device in the entire power grid does not need to be transmitted to the control management terminal for processing and analysis. On the one hand, it greatly reduces the transmission volume of various data information and reduces the requirements for data transmission capacity; on the other hand, it effectively improves the monitoring and management efficiency of the entire power grid; on the other hand, it improves the security of the monitoring and management of the entire power grid; Among the above technologies, although it is proposed to improve the early warning capability of the power grid and the monitoring and management security of the power grid arrangement, with the penetration of power grids in new energy areas, the risk of disconnection in most areas has increased sharply, and the regional power grid control has poor applicability and weak intelligence; At the same time, due to poor regional control, it is easy to cause large-scale voltage risks to increase, causing regional voltage collapse, failing to meet voltage usage requirements, and leading to large-scale power outages and other problems.

[0003] Moreover, due to the complex distribution of voltage inverters, it is difficult to monitor the entire device, which is not conducive to group control monitoring. The control technology for massive inverter clusters is backward, and rapid and accurate control is difficult, making it difficult to implement intelligent control decisions.

[0004] Moreover, the overall control system is used centrally by all users, and the overall control cannot be achieved, resulting in dispersion between regions, making it difficult to adapt to the overall framework structure, and unable to receive and feedback in a timely manner, and unable to achieve a coordinated reactive voltage control system.

[0005] So we proposed a smart grid monitoring system to solve the problems raised above. Summary of the invention

[0006] The purpose of the present invention is to provide a smart grid monitoring system to solve the problem raised by the above background technology that due to technical limitations or cost considerations, power companies in the current market only use one or a few notification methods, which may result in some users being unable to receive power outage notifications in a timely manner. Especially in emergency situations, a single notification method may not be able to meet the needs of all users.

[0007] To achieve the above object, the present invention provides the following technical solutions: a smart grid monitoring system, comprising a public main grid center, a reactive voltage control center, a dynamic group voltage control center and an intelligent server terminal; In the public power grid, the voltage is transmitted to users through the reactive voltage control center, dynamic group voltage control center and intelligent server terminal, and cluster control is performed at the same time to meet the control requirements of the power grid in the area with high penetration of new energy; The dynamic grouping voltage control center is connected to the power grid through the regulation center. During the communication data transmission, the data is transmitted to the customer in real time, and the customer feedback information is received in real time. The maintenance personnel are arranged to conduct on-site inspection and maintenance. At the same time, the power grid equipment is viewed in real time through the connected monitoring, and the equipment management and adjustment are carried out. The decision-making technology of artificial intelligence can be implemented through the feedback of the decision support system and the intelligent server; The intelligent server terminal is connected to the power grid through the energy management system. When multiple inverters are connected, the energy management system can feed back the inverter information to the intelligent server terminal, and then adjust multiple inverters individually through the connection of the group control terminal, so that the data can be changed and the accurate data can be quickly controlled; The reactive voltage control center is connected to the power grid through an AC line segment. When transmitting electricity, the control center measures the voltage in real time, analyzes the demand data of the power grid, and calculates the data through a computer to see if the constraints are met. Then, the center issues instructions through the connection allocation of the inverter, and waits for the instructions to be completed before transmitting electricity. Environmental monitoring, local monitoring and cloud data are connected. Through environmental detection and viewing, weather is checked. In conjunction with local monitoring, when maintenance notifications are received, maintenance personnel can view them in real time and upload the data. The data is saved through cloud data, making it easy to check the maintenance status anytime and anywhere and take corresponding countermeasures. The generator changes the voltage, frequency, number of phases and other electrical quantities or characteristics of the power system through the inverter, and can transmit the excess electricity generated to the power grid. At the same time, it can be used in conjunction with the connected photovoltaic array, and can convert the variable DC voltage generated by the photovoltaic (PV) solar panel into AC power (AC) at the mains frequency. The inverter can be fed back to the commercial transmission system or used for off-grid power grids. The excess electricity can be stored in the energy storage battery and provided to users for charging other electrical equipment.

[0008] Preferably, the reactive voltage control center can perform real-time voltage testing to meet voltage usage requirements, form constraints, and perform inverter connection allocation. By transmitting instructions, it can provide users with real-time electricity delivery needs and perform reactive voltage control.

[0009] Preferably, the dynamic grouping voltage control center can form artificial intelligence control, send user information and information for feedback, make online intelligent decisions based on the received information through the decision support system, manage power grid-related equipment and real-time monitoring of the power grid, and notify management personnel to carry out maintenance and installation of user electricity.

[0010] Preferably, the intelligent server terminal can connect multiple inverters to form a regional new energy cluster dynamic reactive power fast and accurate group control technology.

[0011] Preferably, the environmental monitoring can monitor the environment of power grid-related equipment, predict the impact and record the environment, and upload information to ensure the installation and use of subsequent equipment.

[0012] Preferably, the local monitoring can perform real-time monitoring of voltage equipment and upload it to cloud data, so that maintenance personnel can check the damage and adopt different maintenance methods based on the information received by the monitoring.

[0013] Preferably, the generator can utilize other resources to generate electric energy, and convert AC power to DC power through an inverter to be suitable for different places.

[0014] Preferably, the photovoltaic array can receive and convert the light energy absorbed, and through the connected photovoltaic inverter, a variable DC voltage is converted into AC power of mains frequency, which can be directly used by electrical equipment and the excess electricity generated can be transmitted to the power grid for use.

[0015] Preferably, the energy storage battery can store electricity, and through the connection of the storage inverter, the energy storage inverter can adjust the output voltage value to be consistent with the energy storage battery when in use, so as to ensure that different types of energy storage batteries can be used to store electricity.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the intelligent grid monitoring system can realize dual-time sequence multi-resource coordinated reactive voltage control based on dynamic grouping, can perform voltage transmission test, receive and issue instructions when the voltage is transmitted, and analyze the data in real time, and perform artificial intelligence online decision-making technology on reactive voltage control, and can perform fast and accurate group control of regional cluster dynamic reactive power, and perform reactive voltage coordinated system processing and control of new energy high penetration power grid. The specific contents are as follows: (1) Provide voltage measurement and perform numerical calculations to determine whether the constraints are met to ensure safety. Voltage can only be transmitted and used after instructions are issued and completed. (2) Furthermore, through the setting of artificial intelligence, rapid decision-making on reactive power and voltage information can be made, timely information reminders can be given to users, and the efficiency of information transmission can be improved. At the same time, feedback information from users can be received, and feedback can be quickly provided and personnel can be arranged for processing; (3) Enhance user awareness and enable users to receive information in a timely manner, so that users have enough time to take appropriate measures and reduce the impact of power outages on their lives and work; (4) Improve unification, connect and use related equipment through intelligent systems, quickly and accurately perform group control, achieve higher efficiency, and quickly arrange relevant personnel to handle the problem; (5) Collaborative integrated control: connecting through a new energy high-penetration reactive voltage collaborative control system, so that discrete equipment has low operating frequency, reduced line loss, and higher reactive power, and can provide a highly reliable, low-cost large-scale technical solution for the voltage safety of new regional power grids; (6) Use of low-cost energy, through generators to provide part of the electrical energy for use in electrical equipment; (7) Solar energy conversion and utilization: The photovoltaic array is used to absorb and convert solar energy, and the excess electrical energy can be transmitted to the power grid, so that the power grid can provide electrical energy to other areas for use; (8) Energy storage: Electric energy can be stored in batteries, which can be carried and used. In addition, there is continuous power available when there is a short power outage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the voltage cooperative control system of the present invention; Figure 2 It is a schematic diagram of the reactive voltage control method of the present invention; Figure 3 This is a schematic diagram of the artificial intelligence online decision-making technology of the present invention; Figure 4 It is a schematic diagram of the reactive power precise group control technology of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0019] The present invention provides the following technical solutions: including a public main power grid center, a reactive voltage control center, a dynamic group voltage control center and an intelligent server terminal; In the public power grid, the voltage is transmitted to users through the reactive voltage control center, dynamic group voltage control center and intelligent server terminal, and cluster control is performed at the same time to meet the control requirements of the power grid in the area with high penetration of new energy; The dynamic grouping voltage control center is connected to the power grid through the regulation center. During the communication data transmission, the data is transmitted to the customer in real time, and the customer feedback information is received in real time. The maintenance personnel are arranged to conduct on-site inspection and maintenance. At the same time, the power grid equipment is viewed in real time through the connected monitoring, and the equipment management and adjustment are carried out. The decision-making technology of artificial intelligence can be implemented through the feedback of the decision support system and the intelligent server; The intelligent server terminal is connected to the power grid through the energy management system. When multiple inverters are connected, the energy management system can feed back the inverter information to the intelligent server terminal, and then adjust multiple inverters individually through the connection of the group control terminal, so that the data can be changed and the accurate data can be quickly controlled; The reactive voltage control center is connected to the power grid through an AC line segment. When transmitting electricity, the control center measures the voltage in real time, analyzes the demand data of the power grid, and calculates the data through a computer to see if the constraints are met. Then, the center issues instructions through the connection allocation of the inverter, and waits for the instructions to be completed before transmitting electricity. Environmental monitoring, local monitoring and cloud data are connected. Through environmental detection and viewing, weather is checked. In conjunction with local monitoring, when maintenance notifications are received, maintenance personnel can view them in real time and upload the data. The data is saved through cloud data, making it easy to check the maintenance status anytime and anywhere and take corresponding countermeasures. The generator changes the voltage, frequency, number of phases and other electrical quantities or characteristics of the power system through the converter, and can transmit the excess electricity generated to the grid. At the same time, it can be used with the connected photovoltaic array, and can convert the variable DC voltage generated by the photovoltaic (PV) solar panel into AC (alternating current) at the mains frequency. The inverter can be fed back to the commercial transmission system or used for off-grid power grids. The excess electricity can be stored in the energy storage battery and provided to users for charging other electrical equipment. Embodiment 1: New energy reactive power voltage coordinated control system; In the power grid monitoring system, power is supplied through the main power grid to the user. During the use of the current, the generator, photovoltaic array and energy storage battery are used to provide and use the excess power, and the power is stored for subsequent use. Before transmission, the voltage safety instruction is provided to ensure the safe use of the power supply. Through the online decision-making and group control rapid positioning of artificial intelligence, the control requirements of the regional power grid are met to ensure the safe use of electricity for more users. The AVC full-process control system of the power grid in the area with high penetration of new energy can be constructed. The full set of system equipment can generally increase the voltage qualification rate by 0.3-2%, solve the problems of frequent discrete equipment action, increased line loss and insufficient reactive power, effectively promote the safe and low-carbon operation of the power grid, and have significant social benefits. It provides a highly reliable and low-cost large-scale technical solution for the voltage safety of the power grid in new areas with high penetration of new energy. Embodiment 2: Dual-sequence coordinated voltage control; Before the power grid system transmits voltage, a real-time voltage safety test is performed to ensure that it meets the power grid requirements and the power demand of users. The test system conducts a quick command test to determine whether the constraints can be met, so that the inverter distributes the voltage, issues the command, and then waits for the command to be completed before transmitting the voltage, so that users can use electricity quickly, while ensuring the power supply needs and safety, and reducing the problems caused by the voltage supply. Embodiment 3: Artificial intelligence online decision making; The artificial intelligence system can make quick decisions through system terminals and decision support systems. After receiving user feedback, it can quickly reply to users so that users can receive replies immediately and feel at ease. At the same time, it can check the situation through real-time monitors, quickly arrange personnel for on-site maintenance, and prompt the use of relevant equipment. It uses online monitoring to check the on-site situation in real time and quickly make subsequent maintenance steps. Embodiment 4: Dynamic, fast and accurate group control; Regional voltage equipment is managed in a unified manner through group control technology. Through system automation control integration technology, the operating interfaces of multiple voltage equipment are mapped to the computer monitor, achieving the effect of controlling multiple voltage equipment by one computer, and implementing centralized management and control.

[0020] Embodiment 5: Feedback of excess power; When the total power grid is transmitting electricity, part of the electric energy can be provided and transmitted through the generator, used in electrical equipment, and converted into light energy. The photovoltaic array is used to absorb and convert light energy, and the excess electric energy is transmitted to the power grid through the inverter. The power grid can provide electric energy to other areas for use again, ensuring the electricity needs of more users. At the same time, it can store energy and save it. Electric energy can be stored in batteries and energy storage piles can be set up to charge trams and other equipment.

[0021] like Figure 1-Figure 4 As shown in the figure, the smart grid monitoring system performs real-time voltage safety detection through the reactive voltage control center, dynamic group voltage control center and intelligent server terminal installed at key nodes during the transmission process of the total power grid, and accurately controls the transmitted current and voltage to ensure safe electricity use in the area. At the same time, it conducts real-time monitoring and records relevant data. These data will be transmitted to the cloud data for recording, providing more accurate data for subsequent processing; The high penetration system of new energy can quickly provide electricity when regional electricity consumption increases through coordinated processing and control, avoiding local voltage collapse and the risk of new energy grid disconnection, and making the voltage equipment within the region group-controlled. Using a host system, multiple devices within the region can be controlled to make rapid control more accurate. When the power grid is transmitting, it can connect the corresponding photovoltaic and generator equipment, and feed back the excess electricity to the main power grid through the conversion of the inverter, so that the user's electricity demand is more sufficient. It can also store excess electricity through energy storage batteries, which can be used for energy storage and charging of electric vehicles, batteries and other equipment. At the same time, in the voltage distribution scene, power consumption monitoring equipment is set up to conduct real-time monitoring, feedback and recording, so that the host system can receive real-time information and the artificial intelligence system can respond quickly when encountering a situation; It can also detect power supply anomalies in real time, such as short circuit, leakage, overload, overtemperature, etc. The system can quickly arrange personnel to take maintenance measures. When it detects that the voltage of a circuit is abnormal, the system will trigger a notification to remind personnel to conduct inspections and remind users that the line needs to be repaired and a short power outage will occur. Once the manual system determines that maintenance is needed, it will quickly make a decision and generate a power outage notice to notify all users involved in the maintenance line in the area, so that users can receive information such as the power outage time, location, cause, and maintenance time. At the same time, the power outage notice can be notified through multiple channels, such as APP, SMS, email, and phone calls, so that users can make preparations in time and understand the details of the power outage; When a power outage notification is sent, the system will notify nearby maintenance personnel to go and investigate and repair. At the same time, it will provide the cause and situation of the power outage, and provide relevant real-time monitoring videos, reminding them to use relevant equipment for repairs, ensuring that maintenance personnel can make corresponding judgments on the damage and achieve higher safety and maintenance efficiency. The artificial intelligence system will record relevant information and store it in the cloud. During maintenance, it can check previous relevant situations, repair and replace equipment in a timely manner, and avoid the occurrence of hidden dangers.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A smart grid monitoring system, including a public main grid center, a reactive voltage control center, a dynamic group voltage control center and an intelligent server terminal; In the public power grid, the voltage is transmitted to users through the reactive voltage control center, dynamic group voltage control center and intelligent server terminal, and cluster control is performed at the same time to meet the control requirements of the power grid in the area with high penetration of new energy; The dynamic grouping voltage control center is connected to the power grid through the regulation center. During the communication data transmission, the data is transmitted to the customer in real time, and the customer feedback information is received in real time. The maintenance personnel are arranged to conduct on-site inspection and maintenance. At the same time, the power grid equipment is viewed in real time through the connected monitoring, and the equipment management and adjustment are carried out. The decision-making technology of artificial intelligence can be implemented through the feedback of the decision support system and the intelligent server; The intelligent server terminal is connected to the power grid through the energy management system. When multiple inverters are connected, the energy management system can feed back the inverter information to the intelligent server terminal, and then adjust multiple inverters individually through the connection of the group control terminal, so that the data can be changed and the accurate data can be quickly controlled; The reactive voltage control center is connected to the power grid through an AC line segment. When transmitting electricity, the control center measures the voltage in real time, analyzes the demand data of the power grid, and calculates the data through a computer to see if the constraints are met. Then, the center issues instructions through the connection allocation of the inverter, and waits for the instructions to be completed before transmitting electricity. Environmental monitoring, local monitoring and cloud data are connected. Through environmental detection and viewing, weather is checked. In conjunction with local monitoring, when maintenance notifications are received, maintenance personnel can view them in real time and upload the data. The data is saved through cloud data, making it easy to check the maintenance status anytime and anywhere and take corresponding countermeasures. The generator changes the voltage, frequency, number of phases and other electrical quantities or characteristics of the power system through the inverter, and can transmit the excess electricity generated to the power grid. At the same time, it can be used in conjunction with the connected photovoltaic array, and can convert the variable DC voltage generated by the photovoltaic (PV) solar panel into AC power (AC) at the mains frequency. The inverter can be fed back to the commercial transmission system or used for off-grid power grids. The excess electricity can be stored in the energy storage battery and provided to users for charging other electrical equipment.

2. A smart grid monitoring system according to claim 1, characterized in that: The reactive voltage control center can perform real-time voltage testing to meet voltage usage requirements, form constraints, and perform inverter connection allocation. By transmitting instructions, it can provide users with real-time electricity transmission requirements and perform reactive voltage control.

3. The smart grid monitoring system according to claim 1, characterized in that: The dynamic grouping voltage control center can form artificial intelligence control, send user information and information for feedback, make online intelligent decisions based on the received information through the decision support system, manage power grid-related equipment and real-time monitoring of the power grid, and notify management personnel to carry out maintenance and installation of user electricity.

4. The smart grid monitoring system according to claim 1, characterized in that: The intelligent server terminal can connect multiple inverters to form a regional new energy cluster dynamic reactive power fast and accurate group control technology.

5. The smart grid monitoring system according to claim 1, characterized in that: The environmental monitoring system can monitor the environment of power grid related equipment, predict the impact and record the environment, and upload the information to ensure the installation and use of subsequent equipment.

6. A smart grid monitoring system according to claim 1, characterized in that: The local monitoring can perform real-time monitoring of voltage equipment and upload it to cloud data, making it easy for maintenance personnel to check the damage and adopt different maintenance methods based on the information received by the monitoring.

7. The smart grid monitoring system according to claim 1, characterized in that: The generator can utilize other resources to generate electric energy, and convert AC power to DC power through an inverter to be suitable for different places.

8. The smart grid monitoring system according to claim 1, characterized in that: The photovoltaic array can receive and convert the light energy absorbed by the photovoltaic array, and convert the variable DC voltage into AC power of the mains frequency through the connected photovoltaic inverter, which can be directly used by electrical equipment and can also transmit the excess electricity generated to the power grid for use.

9. The smart grid monitoring system according to claim 1, characterized in that: The energy storage battery can store electricity. By connecting to the storage inverter, the energy storage inverter can adjust the output voltage value to be consistent with the energy storage battery when in use, so as to ensure that different types of energy storage batteries can be used to store and use electricity.

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