Online monitoring and cooperative regulation and control method and system for risk of local dispatching operation section

Abstract

The invention discloses a local dispatching operation section risk on-line monitoring and cooperative regulation method and system, and belongs to the field of power grid analysis, and the method comprises the steps: collecting grid company data, importing the grid company data into a graph database, and carrying out the modeling to form a node switch graph model; defining a section type, creating a corresponding section, setting an emergency condition grade limit of the section, comparing an equipment value with the set limit, and triggering an alarm when the equipment value exceeds the set limit; according to different overload conditions, corresponding emergency measures are distributed, and feasibility evaluation is carried out before the emergency measures are executed. According to the invention, the state change of the power grid is reflected in real time, the monitoring precision is improved, corresponding measures are rapidly taken, the occurrence of power system faults is reduced, different overload conditions are flexibly handled according to actual conditions, various resources in the power grid are effectively utilized, the power operation efficiency is improved, the operation cost is reduced, and a guarantee is provided for the access and consumption of renewable energy sources. And the development of green energy is promoted.

Description

Technical Field

[0001] The present invention belongs to the field of power grid analysis, and specifically relates to a method and system for online monitoring and coordinated regulation of risks of a ground-dispatching operation section. Background Art

[0002] In the power system, a "section" refers to a specific part of the transmission line or equipment in the power grid. The monitoring and management of these sections is crucial for grid operators because their operating status is directly related to the stability and security of the power system. With the continuous growth of electricity demand, traditional grid monitoring methods face many challenges, such as slow monitoring response speed and inflexible control measures. These problems may lead to unreliable power supply, especially in high load and emergency situations.

[0003] In modern power systems, real-time monitoring and dynamic regulation have become particularly important. By introducing advanced monitoring technologies, grid operators can quickly identify potential risks and take corresponding regulatory measures to ensure a stable supply of electricity. Graph computing-based technologies can effectively process complex data relationships in the power grid and provide more accurate monitoring and regulation capabilities. Summary of the invention

[0004] In view of the above existing problems, the present invention aims to provide a risk online monitoring and coordinated control system for ground-based operation sections based on graph calculation to solve the problems of insufficient traditional power grid monitoring means, slow response speed and inflexible control measures. Through real-time monitoring and dynamic control, the safety and stability of power grid operation can be improved to ensure power supply under various load conditions, especially the rapid response capability under high load and emergency conditions.

[0005] In order to solve the above technical problems, a method for online monitoring and coordinated regulation of the risk of the operating section of the ground regulation is proposed, including:

[0006] Collect data from power grid companies and import them into graph databases, and perform modeling to form node switch graph models. According to telesignaling and telemetry data, update the status of nodes and edges of the graph model in real time. Define section types and create corresponding sections, set emergency level limits for sections, compare equipment values ​​with set limits, and trigger alarms when exceeded. According to different overload conditions, assign corresponding emergency measures, conduct feasibility assessments before emergency measures are implemented, perform load transfer or load shedding measures within the breaker status and generator power range, and monitor the power of generator sets during power generation adjustments.

[0007] As a preferred solution of the method for online monitoring and coordinated regulation of the risk of a ground-dispatching operation section described in the present invention, wherein: the node switch graph model includes importing the full amount of grid organization relationship data, topology data, and measurement data of the grid company into the graph database;

[0008] Model the physical devices of transformers, busbars, generators, loads, and lines as nodes in the graph;

[0009] Switches and knife switches are modeled as edges in the graph, forming a node switch graph model;

[0010] According to the real-time updated telesignaling data, i.e. switch status data and telemetry data, i.e. equipment operation measurement data, the attributes of nodes and edges change over time, the node switch graph model is updated in real time, and the graph structure of time-series changes is a space-time graph.

[0011] As a preferred solution of the method for online monitoring and coordinated regulation of the risk of a ground-regulating operation section described in the present invention, wherein: the defining section type includes defining the section as a target monitoring device, including transformer windings and AC line terminals;

[0012] According to the characteristics and functions of the sections, they are divided into three types: safety-oriented sections, maintenance-oriented sections, and renewable energy capacity assessment sections;

[0013] The creation of the corresponding section includes that the key section will be set as an input of the power grid operator, the user will input the section name, type, target limit of the strategy set and the equipment to be monitored, and the equipment of the monitored section is defined to include the transformer and the AC line terminal and extract the power value;

[0014] The emergency level limit of the set section includes high emergency, medium emergency and low emergency, and a limit value is set, and the limit value is divided into a fixed threshold and a dynamic threshold;

[0015] The fixed threshold includes setting it as a high emergency situation when the power range is between 80% and 85% of the rated power;

[0016] When the power range is between 85% and 90% of the rated power, it is set to medium emergency;

[0017] When the power range is 90%-95% of the rated power, it is set to low emergency.

[0018] As a preferred solution of the method for online monitoring and coordinated regulation of the risk of a ground-distributing operation section described in the present invention, the dynamic threshold includes calculation using the rated power and safety factor of the equipment:

[0019] θ=P e ×(1-k)

[0020] Among them, θ is the threshold, P e is the rated power, k is the safety factor, and its value is 0.05-0.15;

[0021] Compare the device value with the set limit value. When the device value exceeds the limit value, an alarm is triggered and the corresponding status is reported.

[0022] As a preferred solution of the method for online monitoring and coordinated control of the risk of a ground-dispatching section of the present invention, the allocation of corresponding emergency measures includes classifying different section overload situations into high urgency, medium urgency and low urgency;

[0023] For each critical section, three sets of measures, namely three strategy sets, are established: high urgency set, medium urgency set, and low urgency set. Different sets are ranked with different priorities.

[0024] The first rule for measures of the same type is to sort by type. For the high emergency situation, the over-limit situation will worsen. The first priority is to transfer the load, the second priority is to adjust the power generation of the substation, and the third priority is to cut the load.

[0025] For the above-mentioned emergency situation, the first priority is to adjust the power generation of the substation, and the second priority is to transfer the load;

[0026] For the low emergency situation, preventive measures include monitoring the status of equipment and adjusting load distribution.

[0027] As a preferred solution of the method for online monitoring and coordinated regulation of the risk of a ground-adjusting operation section described in the present invention, wherein: the emergency measures corresponding to the allocation also include that the second rule of the same type of measures is sensitivity analysis, considering the size and importance of the load to be transferred, abandoned, and adjusted, and will be sorted according to the sensitivity parameters. In high emergency and medium emergency situations, measures with high sensitivity parameters will be selected, and in low emergency situations, measures with low sensitivity parameters with small impact will be selected;

[0028] The sensitivity parameters include power change and load impact, which are calculated as:

[0029] M=ΔP / P 0

[0030] Where M is the sensitivity, ΔP is the change in power after the measure is applied, and P 0 is the original power before the measure is applied.

[0031] As a preferred solution of the method for online monitoring and coordinated regulation of the risk of a ground-dispatching section of the present invention, the feasibility assessment includes: after the implementation of the measures, the section is monitored in real time, and when the section is overloaded and exceeds the limit, the regulation is carried out according to the overload level allocation strategy set and the corresponding measure priority, and before the measures are executed, the feasibility check of the measures is carried out, including the feasibility check of load transfer and load shedding, and the feasibility check of generator adjustment;

[0032] The feasibility check of load transfer and load shedding is to determine whether load transfer and load shedding measures are allowed, and two assessments are performed:

[0033] The first assessment is to check whether the specified circuit breaker is in the correct switch state. When all the required circuit breakers are closed under the selected load transfer measure, and the circuit breaker that needs to be opened is already in the open state, it is considered that the current measure is not allowed to be executed; when the circuit breaker is in a state opposite to the target state, it is considered that the current measure is allowed to be executed;

[0034] Assessment 2 is that when the circuit breaker that needs to be opened does not transmit power, whether the circuit breaker is opened or not does not affect power transmission, and the current measure is deemed not to be allowed to be implemented;

[0035] The feasibility check of the generator adjustment is to determine the generator sets involved, extract the current power values ​​of the generator sets involved, determine the substations to which the generator sets belong, and monitor the power generation of each substation. When the power generation of the substation is between 80% and 120% of the target value, the current measures are not allowed to be executed. When the power generation of the substation is within the target value range, the current measures are allowed to be executed.

[0036] Another object of the present invention is to provide an online monitoring and coordinated control system for the risks of ground-dispatching operation sections. The present invention aims to solve the problems of real-time monitoring, key section identification, equipment overload risk prevention and coordinated control in emergency situations in power grid operation. By constructing a power grid time-space node switch diagram, defining monitoring sections, setting emergency level limits and real-time monitoring of equipment values, and conducting feasibility assessments of control measures, it is ensured that power grid risks can be identified and responded to in a timely manner, and the safety, stability and reliability of power grid operation can be improved, thereby ensuring the continuity and quality of power supply.

[0037] As a preferred solution of the on-line monitoring and coordinated control system for the risk of the ground-dispatching operation section described in the present invention, it is characterized by comprising a power grid spatiotemporal node switch diagram construction module, a monitoring section definition and creation module, a strategy set construction module, and a monitoring and measure feasibility inspection module;

[0038] The grid spatiotemporal node switch graph construction module imports grid company data into a graph database, models the equipment as nodes in the graph, and models switches and knife switches as edges in the graph to form a node switch graph model. According to telesignaling and telemetry data, the states of nodes and edges of the graph model are updated in real time.

[0039] The monitoring section definition and creation module defines the section as a target monitoring device and creates a corresponding section;

[0040] The strategy set building module sets the emergency level limit of the section, compares the equipment value with the set limit, triggers an alarm when it exceeds the limit, and allocates corresponding emergency measures according to different overload conditions;

[0041] The monitoring and measure feasibility check module performs a feasibility assessment before executing emergency measures, performs load transfer or load shedding measures within the circuit breaker state and the power range of the generator, and monitors the power of the generator set during power generation adjustment.

[0042] A computer device includes a memory and a processor, wherein the memory stores a computer program, and is characterized in that when the processor executes the computer program, the steps of a method described in online monitoring and coordinated regulation of risks of a geostationary operation section are implemented.

[0043] A computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of a method described in online monitoring and coordinated regulation of risks of a geostationary operation section are implemented.

[0044] Beneficial effects of the present invention: The present invention can monitor in real time. By constructing a spatiotemporal node switch diagram, the state change of the power grid can be reflected in real time, thereby improving the monitoring accuracy.

[0045] Efficient response. Automatically allocate strategy sets according to the risk level of the section, quickly take corresponding measures, and reduce the occurrence of power system failures.

[0046] Flexible control: By dynamically adjusting the priority of measures, it can flexibly respond to different overload situations according to actual conditions.

[0047] Optimize resource allocation. Effectively utilize various resources within the power grid to improve power operation efficiency and reduce operating costs.

[0048] Support renewable energy. Provide guarantees for the access and consumption of renewable energy and promote the development of green energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0050] Figure 1 An operation identification flow chart of a method for online monitoring and coordinated regulation of risks of a geological survey operation section provided by an embodiment of the present invention.

[0051] Figure 2A measure sequence design rule diagram for a method for online monitoring and coordinated regulation of risks of a geostationary operation section provided by an embodiment of the present invention.

[0052] Figure 3 A system functional architecture diagram of a system for online monitoring and coordinated control of risks of a geological survey operation section provided in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0054] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0055] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively.

[0056] The present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0057] At the same time, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] Example 1, reference Figure 1-Figure 2 , which is the first embodiment of the present invention, and provides a method for online monitoring and coordinated regulation of risks of a ground-dispatching operation section, comprising:

[0060] S1: Collect data from power grid companies and import them into the graph database, and model them to form a node switch graph model. According to the telesignaling and telemetry data, update the status of nodes and edges of the graph model in real time.

[0061] Furthermore, the grid company's full grid organizational relationship data, topology data, and measurement data are imported into the graph database;

[0062] Model the physical devices of transformers, busbars, generators, loads, and lines as nodes in the graph;

[0063] Switches and knife switches are modeled as edges in the graph, forming a node switch graph model;

[0064] According to the real-time updated telesignaling data, i.e. switch status data and telemetry data, i.e. equipment operation measurement data, the attributes of nodes and edges change over time, the node switch graph model is updated in real time, and the graph structure of time-series changes is a space-time graph.

[0065] Among them, graph computing technology uses a graph database to build a spatiotemporal node switch graph of the power grid to achieve efficient data storage and query.

[0066] Dynamic status updates, real-time updates of node and edge attributes, ensure the timeliness and accuracy of monitoring data.

[0067] S2: Define the section type and create the corresponding section, set the emergency level limit of the section, compare the equipment value with the set limit, and trigger an alarm if it exceeds the limit.

[0068] Preferably, the section is defined as the target monitoring device, including the transformer winding and the AC line terminal;

[0069] According to the characteristics and functions of the sections, they are divided into three types, including safety-oriented sections, maintenance-oriented sections, and renewable energy capacity assessment sections; the sections are defined in multiple dimensions, and various types of monitoring sections can be flexibly defined according to different monitoring needs to adapt to different operating scenarios.

[0070] Specifically,

[0071] Safety oriented sections that monitor real-time downstream load conditions under normal operating conditions. Only the positive power flow transmitted through the monitored transformer winding high voltage section and the selected AC line terminals is checked.

[0072] Maintenance-oriented sections, these critical sections are mainly activated during the maintenance of the target equipment. Other monitored equipment will be evaluated for their load-bearing capacity.

[0073] Renewable energy capacity assessment sections, which monitor their load’s ability to assimilate downstream renewable resources. These sections differ from safety-oriented sections in that the direction of power flow is different.

[0074] The creation of the corresponding section includes that the key section will be set as an input of the power grid operator, the user will input the section name, type, target limit of the strategy set and the equipment to be monitored, and the equipment of the monitored section is defined to include the transformer and the AC line terminal and extract the power value;

[0075] The emergency level limit of the set section includes high emergency, medium emergency and low emergency, and a limit value is set, and the limit value is divided into a fixed threshold and a dynamic threshold;

[0076] The fixed threshold includes considering relevant standards and specifications of the power industry, combining historical operation data and load conditions, analyzing past overload conditions, and setting corresponding thresholds:

[0077] When the power range is 80%-85% of the rated power, it is set to high emergency;

[0078] When the power range is between 85% and 90% of the rated power, it is set to medium emergency;

[0079] When the power range is 90%-95% of the rated power, it is set to low emergency.

[0080] The dynamic threshold includes, calculated using the rated power of the equipment and a safety factor:

[0081] θ=P e ×(1-k)

[0082] Among them, θ is the threshold, P e is the rated power, k is the safety factor, and its value is 0.05-0.15;

[0083] Compare the device value with the set limit value. When the device value exceeds the limit value, an alarm is triggered and the corresponding status is reported.

[0084] S3: Assign corresponding emergency measures according to different overload conditions, conduct feasibility assessment before implementing emergency measures, perform load transfer or load shedding measures within the circuit breaker status and generator power range, and monitor the power of the generator set during power generation adjustment.

[0085] Furthermore, different cross-section overload situations are divided into high urgency, medium urgency and low urgency; when the cross-section overload is serious, effective and quick measures are preferred; when the cross-section overload is slight, measures with the least impact on power flow are usually implemented. Therefore, for each critical cross-section.

[0086] For each critical section, three sets of measures, namely three strategy sets, are established: high urgency set, medium urgency set, and low urgency set. Different sets are ranked with different priorities.

[0087] Specifically, the three measures are as follows:

[0088] Load Shifting: Shifting of power demand from one line / transformer / busbar to another, involving circuit breaker switching operations.

[0089] Substation power generation adjustment: Alleviate overload by adjusting the power generation of renewable energy.

[0090] Load shedding: directly cutting off part of the load, usually with the lowest priority.

[0091] In addition, the first rule of the same type of measures is to sort by type. For the high emergency situation, the over-limit situation will worsen. The first priority is to transfer the load, the second priority is to adjust the power generation of the substation, and the third priority is to cut the load;

[0092] For the medium emergency situation, the first priority is to adjust the power generation of the substation, and the second priority is to transfer the load; in the medium emergency strategy set, load shedding is the least priority type, and such measures will not be considered in the case of slight overload.

[0093] For the low emergency situation, preventive measures include monitoring the status of equipment and adjusting load distribution.

[0094] It should be noted that the second rule for measures of the same type is sensitivity analysis, which takes into account the size and importance of the load of transfer, abandonment and adjustment, and will be ranked according to the sensitivity parameter. In high and medium emergency situations, measures with high sensitivity parameters will be selected, while in low emergency situations, measures with low sensitivity parameters with small impact will be selected;

[0095] The sensitivity parameters include power change and load impact, which are calculated as:

[0096] M=ΔP / P 0

[0097] Where M is the sensitivity, i.e., the degree of influence of a certain measure (such as load transfer, load shedding or power generation adjustment) on system performance (such as power flow, system stability, etc.); ΔP is the change in power after the measure is applied, P 0 is the original power before the measure is applied.

[0098] In order to improve the accuracy of sensitivity, the load influence L and risk factor R are considered at the same time:

[0099]

[0100] It should also be noted that after the implementation of the measures, the section is monitored in real time. When the section is overloaded, the strategy set and the corresponding measure priority are allocated according to the overload level for regulation. Before the measures are implemented, the feasibility of the measures is checked, including the feasibility of load transfer and load shedding, and the feasibility of generator adjustment.

[0101] The feasibility check of load transfer and load shedding is to determine whether load transfer and load shedding measures are allowed, and two assessments are performed:

[0102] The first assessment is to check whether the specified circuit breaker is in the correct switch state. When all the required circuit breakers are closed under the selected load transfer measure, and the circuit breaker that needs to be opened is already in the open state, it is considered that the current measure is not allowed to be executed; when the circuit breaker is in a state opposite to the target state, it is considered that the current measure is allowed to be executed;

[0103] Assessment 2 is that when the circuit breaker that needs to be opened does not transmit power, whether the circuit breaker is opened or not does not affect power transmission, and the current measure is deemed not to be allowed to be implemented;

[0104] The feasibility check of the generator adjustment is to determine the generator sets involved, extract the current power values ​​of the generator sets involved, determine the substations to which the generator sets belong, and monitor the power generation of each substation. When the power generation of the substation is between 80% and 120% of the target value, the current measures are not allowed to be executed. When the power generation of the substation is within the target value range, the current measures are allowed to be executed.

[0105] The feasibility check mechanism conducts strict feasibility checks before taking any measures to ensure their effectiveness and safety.

[0106] Example 2 is an embodiment of the present invention, which provides a method for online monitoring and coordinated regulation of risks of a ground-smoothing operation section. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through experiments.

[0107] The feasibility of the proposed method is tested on a computer server equipped with an 8-core CPU and 16GB memory.

[0108] The graph database used is Tigergraph Database version 3.3.

[0109] 24-hour data of a 220 kV substation and its downstream substations, 10 kV feeders and generators were selected from a regional dispatching center to verify the proposed method.

[0110] The substation has two hydropower plants and multiple solar power plants supplying its downstream loads, making it vulnerable to generation peaks caused by excess renewable energy generation and low power demand. In this case, a critical section was created to monitor the overload problem of the two transformers in this 220kV substation. The dispatch center provided the corresponding measures and used them as inputs to the measures as shown in Table 1, and a sensitivity analysis was also performed.

[0111] The priority rankings of measures were rearranged according to their type and sensitivity parameters, with measures with higher sensitivity parameters being assigned higher priority rankings for high urgency strategies, and measures with lower sensitivity parameters being assigned higher priority rankings for low urgency strategies.

[0112] Since the section exceeded the low urgency limit, the low urgency strategy set was successfully executed according to the priority ranking of the measures.

[0113] Table 1

[0114]

[0115] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0116] Embodiment 3, the third embodiment of the present invention, is different from the first two embodiments in that:

[0117] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program codes.

[0118] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0119] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0120] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0121] Example 4, reference Figure 3 , which is the fourth embodiment of the present invention, and provides a system for online monitoring and coordinated control of risks of a ground-dispatching operation section, including a power grid time-space node switch diagram construction module 10, a monitoring section definition and creation module 20, a strategy set construction module 30, and a monitoring and measure feasibility inspection module 40;

[0122] The power grid spatiotemporal node switch graph construction module 10 imports the power grid company data into the graph database, models the equipment as nodes in the graph, and models the switches and knife switches as edges in the graph, forming a node switch graph model, and updates the states of the nodes and edges of the graph model in real time according to the telesignaling and telemetry data;

[0123] The monitoring section definition and creation module 20 defines the section as a target monitoring device and creates a corresponding section;

[0124] The strategy set building module 30 sets the emergency level limit of the section, compares the equipment value with the set limit, triggers an alarm when it exceeds the limit, and allocates corresponding emergency measures according to different overload conditions;

[0125] The monitoring and measure feasibility check module 40 performs a feasibility assessment before executing the emergency measures, performs load transfer or load shedding measures within the circuit breaker status and the power range of the generator, and monitors the power of the generator set during power generation adjustment.

[0126] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for online monitoring and coordinated regulation of risks in a geostationary section, characterized in that: include, Collect data from power grid companies and import them into the graph database, and then model them to form a node switch graph model. Based on telesignaling and telemetry data, update the status of nodes and edges of the graph model in real time. Define the section type and create the corresponding section, set the emergency level limit of the section, compare the equipment value with the set limit, and trigger an alarm if it exceeds the limit; According to different overload conditions, corresponding emergency measures are assigned, and feasibility assessment is carried out before the emergency measures are implemented. Load transfer or load shedding measures are carried out within the circuit breaker status and the power range of the generator. At the same time, the power of the generator set is monitored during power generation adjustment.

2. The method for online monitoring and coordinated control of the risk of a geological survey section according to claim 1, characterized in that: The node switch graph model includes importing the full amount of grid organization relationship data, topology data, and measurement data of the grid company into the graph database; Model the physical devices of transformers, busbars, generators, loads, and lines as nodes in the graph; Switches and knife switches are modeled as edges in the graph, forming a node switch graph model; According to the real-time updated telesignaling data, i.e. switch status data and telemetry data, i.e. equipment operation measurement data, the attributes of nodes and edges change over time, the node switch graph model is updated in real time, and the graph structure of time-series changes is a space-time graph.

3. The method for online monitoring and coordinated control of the risk of a geological survey section according to claim 2, characterized in that: Defining the section type includes defining the section as a target monitoring device, including transformer windings and AC line terminals; According to the characteristics and functions of the sections, they are divided into three types: safety-oriented sections, maintenance-oriented sections, and renewable energy capacity assessment sections; The creation of the corresponding section includes that the key section will be set as an input of the power grid operator, the user will input the section name, type, target limit of the strategy set and the equipment to be monitored, and the equipment of the monitored section is defined to include the transformer and the AC line terminal and extract the power value; The emergency level limit of the set section includes high emergency, medium emergency and low emergency, and a limit value is set, and the limit value is divided into a fixed threshold and a dynamic threshold; The fixed threshold includes setting it as a high emergency situation when the power range is between 80% and 85% of the rated power; When the power range is between 85% and 90% of the rated power, it is set to medium emergency; When the power range is 90%-95% of the rated power, it is set to low emergency.

4. The method for online monitoring and coordinated control of the risk of a geological survey section according to claim 3, characterized in that: The dynamic threshold includes, calculated using the rated power of the equipment and a safety factor: θ=P e ×(1-k) Among them, θ is the threshold, P e is the rated power, k is the safety factor, and its value is 0.05-0.15; Compare the device value with the set limit value. When the device value exceeds the limit value, an alarm is triggered and the corresponding status is reported.

5. The method for online monitoring and coordinated control of the risk of a geological survey section according to claim 4, characterized in that: The emergency measures corresponding to the allocation include classifying different cross-section overload situations into high urgency, medium urgency and low urgency; For each critical section, three sets of measures, namely three strategy sets, are established: high urgency set, medium urgency set, and low urgency set. Different sets are ranked with different priorities. The first rule for measures of the same type is to sort by type. For the high emergency situation, the over-limit situation will worsen. The first priority is to transfer the load, the second priority is to adjust the power generation of the substation, and the third priority is to cut the load. For the above-mentioned emergency situation, the first priority is to adjust the power generation of the substation, and the second priority is to transfer the load; For the low emergency situation, preventive measures include monitoring the status of equipment and adjusting load distribution.

6. The method for online monitoring and coordinated control of the risk of a geological survey section according to claim 5, characterized in that: The emergency measures corresponding to the allocation also include, the second rule of the same type of measures is sensitivity analysis, considering the size and importance of the load of transfer, abandonment and adjustment, and will be sorted according to the sensitivity parameter. In high emergency and medium emergency situations, measures with high sensitivity parameters will be selected, and in low emergency situations, measures with low sensitivity parameters with small impact will be selected; The sensitivity parameters include power change and load impact, which are calculated as: M=ΔP / P0 Where M is the sensitivity, ΔP is the change in power after the measure is taken, and P0 is the original power before the measure is taken.

7. The method for online monitoring and coordinated control of the risk of a geological survey section according to claim 6, characterized in that: The feasibility assessment includes: after the implementation of the measures, real-time monitoring of the section, when the section is overloaded, regulation is performed according to the overload level allocation strategy set and the corresponding measure priority, and before the measures are executed, feasibility checks are performed on the measures, including feasibility checks on load transfer and load shedding, and feasibility checks on generator adjustment; The feasibility check of load transfer and load shedding is to determine whether load transfer and load shedding measures are allowed, and two assessments are performed: The first assessment is to check whether the specified circuit breaker is in the correct switch state. When all the required circuit breakers are closed under the selected load transfer measure, and the circuit breaker that needs to be opened is already in the open state, it is considered that the current measure is not allowed to be executed; when the circuit breaker is in a state opposite to the target state, it is considered that the current measure is allowed to be executed; Assessment 2 is that when the circuit breaker that needs to be opened does not transmit power, whether the circuit breaker is opened or not does not affect power transmission, and the current measure is deemed not to be allowed to be implemented; The feasibility check of the generator adjustment is to determine the generator sets involved, extract the current power values ​​of the generator sets involved, determine the substations to which the generator sets belong, and monitor the power generation of each substation. When the power generation of the substation is between 80% and 120% of the target value, the current measures are not allowed to be executed. When the power generation of the substation is within the target value range, the current measures are allowed to be executed.

8. A system using a method for online monitoring and coordinated regulation of risk of a geostationary section as claimed in any one of claims 1 to 7, characterized in that: It includes a power grid time-space node switch diagram construction module, a monitoring section definition and creation module, a strategy set construction module, and a monitoring and measure feasibility check module; The grid spatiotemporal node switch graph construction module imports grid company data into a graph database, models the equipment as nodes in the graph, and models switches and knife switches as edges in the graph to form a node switch graph model. According to telesignaling and telemetry data, the states of nodes and edges of the graph model are updated in real time. The monitoring section definition and creation module defines the section as a target monitoring device and creates a corresponding section; The strategy set building module sets the emergency level limit of the section, compares the equipment value with the set limit, triggers an alarm when it exceeds the limit, and allocates corresponding emergency measures according to different overload conditions; The monitoring and measure feasibility check module performs a feasibility assessment before executing emergency measures, performs load transfer or load shedding measures within the circuit breaker state and the power range of the generator, and monitors the power of the generator set during power generation adjustment.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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