Second-level load precision cutting method and system based on province-region control information two-way routing interaction

Abstract

The invention discloses a second-level load precision cutting method and system based on provincial and regional control information two-way routing interaction. The method comprises the following steps: researching and formulating a provincial and regional heterogeneous system load precision cutting control information interaction standard; a provincial and regional load precision cutting control instruction bidirectional routing interaction technology is researched; researching a modeling method and an aggregation technology of second-level fine load resources; the real-time information synchronization and aggregation analysis technology of provincial and local second-level precise load shedding resources is researched; the system comprises a control module, an aggregation module and an analysis module. The safety and stability level and operation efficiency of a large power grid are greatly improved, high-quality development of the power grid is promoted, and the operation efficiency and benefit of the power grid are improved; accurate control and efficient management of the second-level interruptible load are realized, stability and reliability of operation of a power system are improved, and powerful support is provided for intelligent development of the power system.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent dispatching of transformer substations, and in particular to a method and system for precise load shedding in seconds based on two-way routing interaction of provincial and local control information. Background Art

[0002] With the deepening construction of new power systems, the proportion of non-synchronous power sources such as DC transmission and new energy has increased significantly, while the proportion of synchronous power sources represented by conventional coal-fired units has continued to decline. The contradictions in the power grid in terms of system safety, new energy consumption, and power grid utilization efficiency have become increasingly prominent: First, the scale of power reception continues to increase, and the high power reception ratio is prominent. Once serious faults such as DC interlocking and power receiving channel damage occur, it will cause a large power loss, and problems such as frequency stability and section overload are very prominent. The safe operation of the power grid faces severe challenges; second, the means of dealing with power grid faults are relatively single. At present, it mainly relies on conventional unit regulation and batch load regulation. Especially in the case of serious DC interlocking faults, a large number of loads need to be adjusted in a short time. The existing batch load regulation method The mode is simple and extensive, which can easily cause serious impact on social production; third, new energy is developing rapidly, the proportion of new energy installed capacity continues to increase, and distributed photovoltaic is showing explosive growth. Under the influence of photovoltaic power generation, the grid's unified load shows a "duck curve" characteristic with high ends and low in the middle, and the grid's power balance regulation pressure is huge; fourth, the peak-to-valley difference continues to expand, and peak regulation is extremely difficult, which is even more serious during holidays such as the Spring Festival, National Day, and May Day, and new energy is on the verge of power abandonment; fifth, the control means of the power grid under the traditional "source follows load" dispatching mode have been almost exhausted, and new loads such as electric vehicles and energy storage equipment, as well as new energy forms such as load aggregators and smart buildings are constantly emerging. It is urgent to rely on the construction of Zhejiang Internet of Things and power market to expand power grid regulation resources and optimize control modes.

[0003] In the context of large-scale power consumption, AC / DC hybrid connection, and a high proportion of clean energy, each power grid company aggregates massive resources on the grid side and in society, and adopts rigid and precise control methods to deal with problems such as equipment and section over-limit, insufficient backup, etc.; based on the current status of provincial grid companies, there are currently two mainstream methods for the construction of second-level interruptible load systems: one is to establish load substations in each municipal company, and directly connect the second-level resources of the municipal companies to the local dispatching system; the other is to build a load master station in the provincial dispatching company, connect the second-level resources of the entire province, and then distribute them to local dispatching companies through the dispatching data network.

[0004] To sum up, how to establish a set of construction methods that are suitable for interruptible load systems in various places, utilize the short-term interruptibility of loads, promote the transformation of the traditional "source follows load" dispatching mode to the "source, grid, load and storage multi-dimensional coordination" mode, improve the safety and stability level and operation efficiency of large power grids, promote high-quality development of power grids, and improve the efficiency and benefits of power grid operations, is a problem that needs to be solved at present. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a method and system for precise load shedding in seconds based on two-way routing interaction of provincial control information.

[0006] Technical solution: The second-level load precise shedding method based on bidirectional routing interaction of provincial and local control information described in the present invention comprises the following steps:

[0007] (1) Research and formulate information exchange standards for precise load control of heterogeneous systems in provinces and regions;

[0008] (2) Research on bidirectional routing interaction technology of load-saving precise control instructions;

[0009] (3) Research on modeling methods and aggregation technologies for second-level precise load resources;

[0010] (4) Research on real-time information synchronization and aggregation analysis technology for precise load shedding resources in seconds.

[0011] Furthermore, the step (1) comprises:

[0012] (1.1) Determine the key elements of the interaction standard;

[0013] (1.2) Experimental verification and optimization.

[0014] Furthermore, the key elements of step (1.1) include:

[0015] Information format specification: define a unified data format, including load status information and control instruction information; determine the accuracy and unit of the data;

[0016] Communication protocol selection: Evaluate different communication protocols and select the appropriate protocol based on requirements; determine communication ports, IP address allocation network configuration parameters; formulate encapsulation and decapsulation rules for communication protocols;

[0017] Furthermore, the step (1.2) comprises:

[0018] Build a simulation experiment environment, including a provincial power grid control system simulation platform, a local second-level load control substation simulation platform, and a two-way routing interactive channel simulation device;

[0019] In a simulation environment, multiple rounds of testing are conducted on the interaction standards to verify their effectiveness and stability under different load scenarios;

[0020] Based on the test results, the interaction standards are optimized and adjusted, the data format is adjusted, and the communication protocol is optimized.

[0021] Furthermore, the step (3) comprises:

[0022] (3.1) The precise load control system is connected to the power grid safety and stability control system through the control master station and serves as an execution substation of the latter. When the safety and stability system is activated, the precise load control system extends the load shedding command to the interruptible circuit breaker on the user side.

[0023] (3.2) According to the nature of the user's internal power load, each interruptible load is divided into three levels. When the precise load control system is activated, the interruptible load is cut off in the order of priority of the first-level load, the second-level load, and the third-level load.

[0024] Furthermore, the precise load control system of step (3.1) includes two types of terminal control objects, namely, interruptible load and energy storage station. The interruptible load control system is divided into four levels, namely, load control master station, load control substation, load terminal nearest access station, and load terminal. The interruptible load circuit breaker is controlled by the load terminal. The precise load control system of the energy storage station is divided into four levels, namely, precise load control master station, energy storage substation, MUXO2E, and energy storage station load terminal. The PCS power output in the station is adjusted by the load terminal.

[0025] Furthermore, in the step (3.2), the first level of the interruptible load is the non-production load; the second level is the production auxiliary load; and the third level is the main production load.

[0026] The second-level load precise shedding system based on bidirectional routing interaction of provincial and local control information of the present invention comprises:

[0027] Control module, used to study the bidirectional routing interaction technology of land-saving load precision cutting control instructions;

[0028] Aggregation module, used to study the modeling method and aggregation technology of second-level precise load resources;

[0029] The analysis module is used to study the real-time information synchronization and aggregation analysis technology of precise load shedding resources in seconds.

[0030] Furthermore, when the processor executes the program, a method for precise load shedding in seconds based on two-way routing interaction of provincial control information is implemented.

[0031] Furthermore, the computer program is designed to implement a second-level load precision shearing method based on two-way routing interaction of provincial control information when running.

[0032] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: by establishing a set of construction methods that are suitable for interruptible load systems in various places and utilizing the short-term interruptibility of loads, the traditional "source follows load" dispatching mode is promoted to be transformed into a "source, grid, load and storage multi-dimensional coordination" mode, which greatly improves the safety and stability level and operation efficiency of large power grids, promotes the high-quality development of power grids, and improves the efficiency and benefits of power grid operation; realizes precise control and efficient management of interruptible loads in seconds, improves the stability and reliability of power system operation, and provides strong support for the intelligent development of power systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0035] The present invention deeply analyzes the regulation characteristics of the second-level interruptible load, fully considers the adaptability of the interaction between heterogeneous systems, and formulates the provincial and local heterogeneous system load precise control information interaction standard; secondly, based on the provincial and local control information bidirectional routing technology, the information interaction between the power grid control system and the second-level load control substation is completed, thereby realizing the provincial and local independent access function and the provincial and local bidirectional control function of the second-level load; finally, the classification modeling method of the multi-load in the dispatching master station system is studied, the regulation attributes and dispatchable attributes of different types of load resources are constructed, and a hierarchical model of adjustable load resources is formed, so as to meet the needs of aggregated monitoring, analysis and regulation of the province's second-level interruptible load; it is characterized in that: the method provided by the present invention can adapt to the construction methods of different grid and provincial second-level interruptible load systems.

[0036] like Figure 1 As shown, the present invention comprises the following steps:

[0037] (1) Research and formulate information exchange standards for precise load control of heterogeneous systems in provinces and regions;

[0038] The interoperability between provincial and local load control systems is directly related to the accuracy, reliability and real-time performance of load control. By deeply analyzing the regulation characteristics of loads that can be interrupted in seconds, and fully considering the adaptability of interactions between heterogeneous systems, based on standard protocol expansion, three-way handshake mechanism, encrypted transmission mechanism, and exception handling mechanism technical means, the provincial and local heterogeneous system load precision control information interaction standard is formulated to provide standardized guidance for the realization of business functions. The specific steps are as follows:

[0039] (1.1) Determine the key elements of the interaction standard, including: 1) Information format specification: define a unified data format, including load status information (such as load size, interruptibility, response time, etc.), control instruction information (such as open / close instructions, adjustment instructions, etc.); determine the precision and unit of the data to ensure the accuracy and consistency of the information; consider the scalability of the data so that it can adapt to new load types and control requirements in the future; 2) Communication protocol selection: evaluate different communication protocols, such as TCP / IP, UDP, MQTT, etc., and select the appropriate protocol based on real-time, reliability, security and other requirements; determine network configuration parameters such as communication ports and IP address allocation; formulate encapsulation and decapsulation rules for communication protocols;

[0040] (1.2) Experimental verification and optimization, including: 1) Building a simulation experimental environment, including a provincial power grid control system simulation platform, a local second-level load control substation simulation platform, and a two-way routing interaction channel simulation device; 2) In the simulation environment, conduct multiple rounds of tests on the formulated interaction standards to verify their effectiveness and stability under different load scenarios; (3) Based on the test results, optimize and adjust the interaction standards, adjust the data format to improve transmission efficiency, and optimize the communication protocol to enhance real-time performance.

[0041] (2) Research on bidirectional routing interaction technology of load-saving precise control instructions;

[0042] (2.1) Establish a dedicated two-way routing channel to ensure that load precision control instructions can be transmitted quickly and accurately between provinces and regions. This channel has the characteristics of low latency and high bandwidth, and can meet the requirements of second-level response;

[0043] (2.2) Multiple verification and confirmation mechanisms are used to ensure that control instructions are not lost or tampered with during transmission. The sender and receiver will verify the instructions multiple times and will only execute the corresponding operation after confirming that the instructions are complete and correct;

[0044] (2.3) Use advanced encryption technology to encrypt and transmit control instructions to prevent the instructions from being illegally stolen or tampered with.

[0045] (3) Research on modeling methods and aggregation technologies for second-level precise load resources;

[0046] (3.1) The precise load control system is connected to the power grid safety and stability control system through the control master station and serves as an execution substation of the latter. The system includes two types of terminal control objects: interruptible loads and energy storage stations. The interruptible load control system is divided into four levels: load control master station, load control substation, load terminal nearest access station, and load terminal. The interruptible load circuit breaker is controlled by the load terminal; the energy storage station precise load control system is divided into four levels: precise load control master station, energy storage substation, MUXO2E, and energy storage station load terminal. The load terminal adjusts the PCS power output in the station. When the safety and stability system is activated, the precise load control system will quickly and accurately extend the load shedding command to the user-side interruptible circuit breaker;

[0047] (3.2) According to the nature of the user's internal power load, each interruptible load is divided into three levels: the first level is non-production load, such as factory fire protection, lighting, non-production central air conditioning, office lighting, office appliances, and daily electricity; the second level is production auxiliary load, such as workshop air conditioning, fans, conveyor belts, etc., which have little impact after interruption; the third level is the main production load, which will not cause personal safety hazards to users after interruption, but will cause certain economic losses. When the precise load control system is activated, the interruptible load is cut off in the order of priority of the first level load, the second level load, and the third level load.

[0048] (4) Research on real-time information synchronization and aggregation analysis technology for precise load shedding resources in seconds.

[0049] The provincial and local access second-level interruptible loads collect real-time load data and perform aggregation analysis according to multiple levels of regions (provinces, cities, counties, power supply areas, main transformers), operators, load types and other dimensions. From the bottom layer of single load devices to the middle layer of load groups, and then to the upper layer of regional load collections, efficient aggregation management is gradually achieved.

[0050] The second-level load precise shedding system based on bidirectional routing interaction of provincial and local control information of the present invention comprises:

[0051] Control module, used to study the bidirectional routing interaction technology of land-saving load precision cutting control instructions;

[0052] Aggregation module, used to study the modeling method and aggregation technology of second-level precise load resources;

[0053] The analysis module is used to study the real-time information synchronization and aggregation analysis technology of precise load shedding resources in seconds.

Claims

1. A second-level load shedding method based on bidirectional routing interaction of provincial control information, characterized in that: The steps include: (1) Research and formulate information exchange standards for precise load control of heterogeneous systems in provinces and regions; (2) Research on bidirectional routing interaction technology of load-saving precise control instructions; (3) Research on modeling methods and aggregation technologies for second-level precise load resources; (4) Research on real-time information synchronization and aggregation analysis technology for precise load shedding resources in seconds.

2. The method for precise load shedding in seconds based on bidirectional routing interaction of provincial control information according to claim 1 is characterized in that: The step (1) comprises: (1.1) Determine the key elements of the interaction standard; (1.2) Experimental verification and optimization.

3. The method for precise load shedding in seconds based on bidirectional routing interaction of provincial control information according to claim 2 is characterized in that: The key elements of step (1.1) include: Information format specification: define a unified data format, including load status information and control instruction information; determine the accuracy and unit of the data; Communication protocol selection: Evaluate different communication protocols and select the appropriate protocol based on requirements; determine the communication port and IP address allocation network configuration parameters; formulate encapsulation and decapsulation rules for the communication protocol.

4. The method for precise load shedding in seconds based on bidirectional routing interaction of provincial control information according to claim 2 is characterized in that: The step (1.2) comprises: Build a simulation experiment environment, including a provincial power grid control system simulation platform, a local second-level load control substation simulation platform, and a two-way routing interactive channel simulation device; In a simulation environment, multiple rounds of testing are conducted on the interaction standards to verify their effectiveness and stability under different load scenarios; Based on the test results, the interaction standards are optimized and adjusted, the data format is adjusted, and the communication protocol is optimized.

5. The method for precise load shedding in seconds based on bidirectional routing interaction of provincial and local control information according to claim 1 is characterized in that: The step (3) comprises: (3.1) The precise load control system is connected to the power grid safety and stability control system through the control master station and serves as an execution substation of the latter. When the safety and stability system is activated, the precise load control system extends the load shedding command to the interruptible circuit breaker on the user side. (3.2) According to the nature of the user's internal power load, each interruptible load is divided into three levels. When the precise load control system is activated, the interruptible load is cut off in the order of priority of the first-level load, the second-level load, and the third-level load.

6. The method for precise load shedding in seconds based on bidirectional routing interaction of provincial and local control information according to claim 5 is characterized in that: The precise load control system in step (3.1) includes two types of final control objects: interruptible load and energy storage station. The interruptible load control system is divided into four levels: load control master station, load control substation, load terminal nearby access station, and load terminal. The interruptible load circuit breaker is controlled by the load terminal; The precise load control system of the energy storage station is divided into four levels: precise load control master station, energy storage substation, MUXO2E, and energy storage station load terminal. The load terminal regulates the PCS power output in the station.

7. The method for precise load shedding in seconds based on bidirectional routing interaction of provincial and local control information according to claim 5 is characterized in that: In the step (3.2), the first level of interruptible load is non-production load; the second level is production auxiliary load; and the third level is main production load.

8. A second-level load shedding system based on two-way routing interaction of provincial control information, characterized in that: include: Control module, used to study the bidirectional routing interaction technology of land-saving load precision cutting control instructions; Aggregation module, used to study the modeling method and aggregation technology of second-level precise load resources; The analysis module is used to study the real-time information synchronization and aggregation analysis technology of precise load shedding resources in seconds.

9. An electronic device comprising a memory, a processor, and a program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the method for precise load shedding in seconds based on bidirectional routing interaction of provincial control information is implemented according to any one of claims 1 to 7.

10. A storage medium storing a computer program, characterized in that: The computer program is designed to implement the second-level load precision shearing method based on bidirectional routing interaction of provincial control information according to any one of claims 1 to 7 when running.

Images