Electric power system fusion safety and stability control method and system

Abstract

The invention discloses a power system fusion security and stability control method and system, and provides a novel control measure and establishes a fault matching search model in order to solve the problems that an existing security and stability device does not consider the influence of network attacks and cannot judge and deal with the network attacks. Conventional mode processing is carried out when conventional faults occur, and network attack mode processing is carried out in a network attack scene. Then, in consideration of inadaptability of a launching and stopping model of an existing security device under the influence of network attacks, a novel security launching and stopping criterion model is established, a fusion control strategy for coping with the network attacks is provided, and accurate response and disposal to malicious behaviors are achieved through a control mechanism of dynamic adjustment and offline matching. According to the method, novel faults caused by network attacks can be identified and reliably controlled, the problem that extreme faults cannot be prevented and controlled in an existing method is solved, and the network attack resisting capacity of the power system is improved.

Description

Technical Field

[0001] The present invention relates to the field of power system security and stability control, and particularly to a power system integrated security and stability control method and system. Background Art

[0002] The coupling degree between the power system and the information system is increasing continuously, bringing new risks and network security hazards to the safe and stable operation of modern power systems. Attackers use security vulnerabilities to break through security systems such as firewalls, isolation devices, and intrusion detection devices, enter the production control area of the power system, maliciously disconnect circuit breakers, disconnectors, or shut down operating generators, resulting in security and stability problems in the power grid. However, existing security and stability control devices are designed for conventional faults and cannot identify new fault modes such as frequent opening and closing of components and malicious switching under network attacks. In addition, simple control means such as generator tripping, load shedding, and power adjustment adopted by existing security and stability devices cannot adapt to the uncontrolled environment caused by network attacks, and are extremely likely to cause control strategy failures, and corresponding control strategies cannot be matched for new faults. Therefore, it is urgent to invent a security and stability control method for setting extreme risks such as network attacks, preventing the spread of extreme faults, and ensuring the safe and stable operation of the power system. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a power system integrated security and stability control method and system for identifying and disposing of network attacks, preventing the spread of extreme faults, and ensuring the safe and stable operation of the power system in view of the deficiencies of the prior art.

[0004] To solve the above technical problem, the technical solution adopted by the present invention is: a power system integrated security and stability control method, including the following steps:

[0005] Construct a policy table including fault information and network topology, and use the policy table to determine control measures; the elements in the policy table are determined by the following formula:

[0006]

[0007] where A(X) is the control measure, RX is the removed generator, RL is the removed load, FX is the application of strong excitation, SPPF, FT, and BLVF are the output results of the fault diagnosis models SPPFM, TFM, and BLVFM, CVQ is the fast valve closure, T p is the component type, JZ is the unit, DC-M is the DC modulation, DC is the DC pole, ICB is the information channel blocking, N F =1 is the number of faults occurred, P F =MS represents a fault occurring at the master station, P F=SS represents a fault in the substation, CCI is the control channel interlock, SPI is the stop plate interlock, SSI is the switch state interlock, FIF, DC-FIF, CLAF, RRAF are the output results of the fault diagnosis models FIFM, DC-FIFM, CLAFM, RRAFM.

[0008] The expressions of fault diagnosis models SPPFM, TFM, and BLVFM are:

[0009] SPPFM = {N IR ≥1,N Ud ≥1, N TWJ =2, T(i) NTWJ -T(i-1) NTWJ ≥T C};

[0010] TFM = {N IR ≥1,N Ud ≥1, N TWJ =1, TWJ=1→3TWJ=1};

[0011] BLVFM={U η ≤U r ,U η (-5)≤U l , T ≥ T u};

[0012] Among them, N IR Increase the number of phases for current, N Ud is the number of phases of voltage reduction, N TWJ is the number of trip signals, T(i) NTWJ -T(i-1) NTWJ is the time difference between the two-phase tripping signals, T C is the reclosing time, TWJ=1→3TWJ=1 means that a three-phase trip signal appears after a single-phase trip signal, U η is the current voltage percentage, U r is the real-time low voltage of the busbar, U η (-5) is the voltage percentage 5s ago, U l is the busbar pressure loss threshold, T is the delay time, T u Delay for busbar pressure loss confirmation.

[0013] The expressions of fault diagnosis models FIFM, DC-FIFM, CLAFM, and RRAFM are:

[0014] FIFM = {N TT ≥2,T Ti ≤T Tl}∪{N YK ≥2,TYi ≤T C};

[0015] CLAFM = {ΔU - ≥U -MAX , ΔP≥P MAX , N dlq =0};

[0016] RRAFM = {SPPF = 1, MIT = 1};

[0017] Among them, N TT is the number of times the main transformer or unit is put into or taken out of service, T Ti is the interval time between the main transformer or unit being taken out of service and put into service, T Tl is the threshold value of the maintenance outage time of the main transformer or unit, N YK is the number of times of remote control put into or taken out of service, T C is the reclosing time, ΔU - is the change amount of the negative sequence voltage component of the three phases of the transformer, U -MAX is the threshold value of the change amount of the negative sequence voltage component, ΔP is the change amount of the transformer power, P MAX is the threshold value of the transformer power change, N dlq is the number of transformer circuit breaker tripping signals, SPPF = 1 represents a single-phase instantaneous fault occurs, MIT = 1 represents a malicious instruction trip occurs, T Yi is the interval time of remote control put into or taken out of service.

[0018] Determine the number of times of putting into or taking out of service according to the putting into or taking out of service criterion model;

[0019] The putting into or taking out of service criterion model is as follows: Among them, X(t) is the output result of the attack behavior, IJA is the information congestion attack, DTA is the data tampering attack, D JXZ (t) = 2 represents that the putting into or taking out of service criterion of the unit, main transformer, and line at time t adopts the second putting into or taking out of service criterion, D DIT (t) = 2 represents that the putting into or taking out of service criterion of the DC pole at time t adopts the second putting into or taking out of service criterion;

[0020] For the first putting into or taking out of service criterion of the main transformer, line, and unit: If the status of the closing position relay is in the closed state, and the voltage of the component is greater than the set value, that is, U > U s , meeting the above is the in-service state; If the status of the closing position relay is in the open state, and the active power is less than the set value, that is, P < P T , meeting the above is the out-of-service state; If the active power is greater than the set value, that is, P > P T , but the status of the closing position relay is in the open state, P ≤ P T , meeting the above is the non-corresponding state;

[0021] The second criterion for the commissioning and decommissioning of main transformers, lines, and units: If the active power is greater than the set value and the current is greater than the threshold value, i.e., P > P T , I > I T , and meeting the above conditions indicates an in-service state; if the active power is less than the set value and the current is less than the threshold value, i.e., P ≤ P T , I ≤ I T , and meeting the above conditions indicates an out-of-service state;

[0022] The third criterion for the commissioning and decommissioning of main transformers, lines, and units: If the pressure plate is inserted and the component voltage is normal, meeting the above conditions indicates an in-service state; if the pressure plate is removed and the component voltage disappears, meeting the above conditions indicates an out-of-service state;

[0023] The first criterion for the commissioning and decommissioning of DC poles: If the DC pole transmission power is greater than the set value, i.e., P > P s , and there is no DC pole blocking signal, meeting the above conditions indicates the commissioning of the DC pole; if the DC pole transmission power is less than the set value, i.e., P ≤ P s , and there is a DC pole blocking signal, meeting the above conditions indicates the decommissioning of the DC pole;

[0024] The second criterion for the commissioning and decommissioning of DC poles: If the converter transformer power is greater than the set value, i.e., P h > P s , and there is no DC pole blocking signal, meeting the above conditions indicates the decommissioning of the DC pole; if the converter transformer power is less than the set value, i.e., P h ≤ P s , and there is a DC pole blocking signal, meeting the above conditions indicates the commissioning of the DC pole.

[0025] As an inventive concept, the present invention also discloses a power system integrated security and stability control system, including a memory, a processor, and a computer program stored on the memory; the processor executes the computer program to implement the steps of the above method.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. The method of the present invention has a high accuracy rate for identifying malicious attack behaviors and will not misjudge normal behaviors, ensuring the safety and stability of the power system. The present invention only models high-risk abnormal behaviors, and low-risk and normal behaviors will not be triggered, ensuring stable and reliable control.

[0028] 2. When the present invention is implemented on the stability control system, the identification and handling of network attacks are deployed in parallel with the traditional stability control scheme, without affecting the original services of the stability control system.

[0029] 3. The design format of the control strategy table proposed by the present invention is standardized and unified, which is easy for later maintenance personnel to modify and debug. At the same time, it can be customized according to requirements. Brief Description of the Drawings

[0030] Figure 1 is the overall flowchart of the power system integrated security and stability control method according to the embodiments of the present invention;

[0031] Figure 2 is the flowchart for querying the integrated stability control strategy according to the embodiments of the present invention;

[0032] Figure 3 is the schematic structural diagram of the power system integrated security and stability control device according to the embodiments of the present invention;

[0033] Figure 4 is the business logic diagram of the start-up judgment control board according to the embodiments of the present invention;

[0034] Figure 5 is the business logic diagram of the logic judgment control board according to the embodiments of the present invention. Detailed Embodiments

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Traditional stability control devices cannot identify and handle network attacks, so traditional stability control services are completely exposed to malicious attack behaviors. To address the above problems, embodiments of the present invention propose a new power system integrated security and stability control method applicable to integrated security and stability control devices. First, construct basic fault measures for integrated security and stability control, including existing basic fault measures for security and stability control and fault measures considering network attacks. Then, consider the impact of network attacks and comprehensively judge the fault types under network attacks through the results of the network traffic malicious behavior detection algorithm model. At the same time, to address the impact of network attacks on the switching criteria, the present invention proposes a new switching criterion model applicable to network attacks, and this method model can well handle malicious attack behaviors. Finally, propose an integrated control strategy, and combine control mechanisms of dynamic adjustment and offline matching to accurately handle power system faults, especially with strong adaptability and robustness in network attack scenarios.

[0037] Embodiment 1

[0038] Figure 1 The overall flowchart of the power system integrated security and stability control method and device provided by the embodiments of the present invention is as follows. The specific implementation steps are as follows:

[0039] Step S1: Construct a new commissioning and decommissioning criterion model for the integrated stability device, fully considering the potential threats of cyberattacks. By intelligently matching the criterion strategies under various cyberattack scenarios, achieve precise defense and effective response to complex cyberattacks.

[0040] Step S2: Construct the control strategy of the stability device, including basic control and new control measures, and establish the basic control mode in the network scenario.

[0041] Step S3: According to the model conditions in Step S1, establish a fault diagnosis model to achieve rapid identification of faults.

[0042] Step S4: According to the fault measure set and fault matching model in S1, S2, and S3, construct an offline strategy to achieve a control mechanism of dynamic adjustment and offline matching.

[0043] Furthermore, the specific implementation method of Step S1 is as follows:

[0044] Step S1-1: Establish the first commissioning and decommissioning criterion for the main transformer, line, and unit, that is, use the active power combined with the circuit breaker position to judge. Specifically:

[0045] If the status of the closing position relay is in the closed state and the voltage of the component is greater than the set value, that is, U > U s , the above conditions are met for the in-service state. If the status of the closing position relay is in the open state and the active power is less than the set value, that is, P < P T , the above conditions are met for the out-of-service state. In addition, if the active power is greater than the set value, that is, P > P T , but the status of the closing position relay is in the open state, P ≤ P T , the above conditions are met for the non-corresponding state.

[0046] Step S1-2: Establish the second commissioning and decommissioning criterion for the main transformer, line, and unit, that is, judge by combining the active power with the current. Specifically:

[0047] If the active power is greater than the set value and the current is greater than the threshold value, that is, P > P T , I > I T , the above conditions are met for the in-service state. If the active power is less than the set value and the current is less than the threshold value, that is, P ≤ P T , I ≤ I T , the above conditions are met for the out-of-service state.

[0048] Step S1-3: Establish the third commissioning and decommissioning criterion for the main transformer, line, and unit, that is, judge by setting soft and hard pressure plates. Specifically:

[0049] If the pressure plate is put into operation and the component voltage is normal, meeting the above conditions indicates the operation state. If the pressure plate is withdrawn and the component voltage disappears, meeting the above conditions indicates the outage state.

[0050] Step S1-4: Establish the first start-stop criterion for the DC pole, which is determined according to the operating state of the DC pole provided by the DC system. Specifically:

[0051] If the DC pole transmission power is greater than the set value, i.e., P > P s , and there is no DC pole blocking signal, meeting the above conditions indicates the DC pole is in operation. If the DC pole transmission power is less than the set value, i.e., P ≤ P s , and there is a DC pole blocking signal, meeting the above conditions indicates the DC pole is out of service.

[0052] Step S1-5: Establish the second start-stop criterion for the DC pole, which is determined by the operating state of the converter transformer. Specifically:

[0053] If the converter transformer power is greater than the set value, i.e., P h > P s , and there is no DC pole blocking signal, meeting the above conditions indicates the DC pole is out of service. If the converter transformer power is less than the set value, i.e., P h ≤ P s , and there is a DC pole blocking signal, meeting the above conditions indicates the DC pole is in operation.

[0054] To further explain the above steps S1-1 to S1-5, considering the impact of cyber attacks, the above start-stop judgments may fail and be misjudged. Therefore, a new start-stop criterion model in the scenario of cyber attacks needs to be established. Specifically as follows:

[0055]

[0056] Among them, X(t) is the output result of the attack behavior, IJA is the information jamming attack, DTA is the data tampering attack, D JXZ (t) = 2 means that the start-stop criterion of the unit, main transformer, and line at time t adopts the second start-stop criterion, D DIT (t) = 2 means that the start-stop criterion of the DC pole at time t adopts the second start-stop criterion.

[0057] Step S2-1: Construct a set of basic stable operation fault measures and achieve rapid allocation through logical rules. The specific fault measures include: tripping the unit; shedding the load; quickly closing the steam valve; reducing the output; DC modulation; electrical braking; and applying forced excitation.

[0058] Step S2-2: Considering the impact of cyber attacks, add security and stability fault measures based on cyber attacks to establish a basic control mode. Specific fault measures include: reclosing operation; reclosing recovery; blocking information channels; blocking control channels; blocking trip and block pressure plates; blocking switch status; blocking all channels.

[0059] Furthermore, the specific implementation method of Step S3 is as follows:

[0060] Step S3-1: Add a basic security and stability fault diagnosis model. The number of commissioning and decommissioning times refers to the number of times of commissioning and decommissioning in one round. The judgment of the commissioning and decommissioning status follows Step S1. The specific fault diagnosis model is as follows:

[0061] (1) Construct SPPFM, specifically as follows:

[0062] SPPFM = {N IR ≥ 1, N Ud ≥ 1, N TWJ = 2, T(i) NTWJ - T(i - 1) NTWJ ≥ T C}

[0063] Where N IR is the number of current increasing phases, N Ud is the number of voltage decreasing phases, N TWJ is the number of trip signals, T(i) NTWJ - T(i - 1) NTWJ is the time difference between two-phase trip signals, and T c is the reclosing time.

[0064] (2) Construct TFM, specifically as follows:

[0065] TFM = {N IR ≥ 1, N Ud ≥ 1, N TWJ = 1, TWJ = 1 → 3TWJ = 1}

[0066] Where N IR is the number of current increasing phases, N Ud is the number of voltage decreasing phases, N TWJ is the number of trip signals, and TWJ = 1 → 3TWJ = 1 represents that a three-phase trip signal appears after a single-phase trip signal.

[0067] (3) Construct BLVFM, specifically as follows:

[0068] BLVFM = {U η ≤ U r , U η (-5) ≤ U l , T ≥ T u}

[0069] Among them U η is the current voltage percentage, U r The real-time low voltage of the busbar, U η (-5) is the voltage percentage 5s ago, U l is the busbar pressure loss threshold, T is the delay time, T u Delay for busbar pressure loss confirmation.

[0070] Further explanation of step 2: The above faults are basic faults, and the objects of occurrence include lines, units, and main transformers. Among them, the power failure of the whole plant is mainly aimed at power plants and load stations. The integrated safety devices arranged in these two places can play a monitoring role.

[0071] Step S3-2: According to the results of the startup / shutdown criterion model in step S1, a new fault diagnosis model is added. The specific contents are as follows:

[0072] (1) Using the investment and stop judgment model in steps S1-1, S1-2, and S1-3, FIFM is further constructed as follows:

[0073] FIFM = {N TT ≥2,T Ti ≤T Tl}∪{N YK ≥2,T Yi ≤T C}

[0074] Where N TT The number of times the main transformer or unit is started or stopped, T Ti The main transformer or unit shutdown interval, T Tl Main transformer or unit maintenance shutdown time threshold, N YK is the number of remote control shots and stops, T C is the reclosing time.

[0075] (2) Using the investment and stop judgment model in steps S1-4 and S1-5, further construct the DC-FIFM, as follows:

[0076] DC-FIFM={N DC ≥3,T DC-i ≤T DC-l}

[0077] Where N DC T is the number of DC switching on and off times, DC-i T is the DC pole switching interval time, DC-l It is the DC pole maintenance shutdown time threshold.

[0078] (2) Construct CLAFM. The specific contents are as follows:

[0079] CLAFM = {ΔU - ≥ U -MAX , ΔP ≥ P MAX , N dlq = 0}

[0080] where ΔU - is the change in the negative sequence voltage component of the three - phase transformer, U -MAX is the threshold of the change in the negative sequence voltage component, ΔP is the change in the transformer power, P MAX is the threshold of the change in the transformer power, and N dlq is the number of transformer open - circuit trip signals.

[0081] (3) Construct RRAFM, the specific content is as follows:

[0082] RRAFM = {SPPF = 1, MIT = 1}

[0083] where SPPF = 1 represents a single - phase instantaneous fault occurs, and MIT = 1 represents a malicious instruction trip occurs.

[0084] Furthermore, Figure 2 is the flow chart for querying the integrated stability control strategy. The integrated control strategy table serves as the final control reference. The specific implementation details of the strategy table and step 4 are as follows:

[0085] Step S4 - 1: Retrieve the component status of the entire network through the on - off judgment model in step S1, determine the network topology, and construct a two - dimensional strategy table. Each table represents an operating mode.

[0086] Furthermore, match the operating mode and the type of network attack to determine which table to run specifically. General operating modes include: normal operating mode, summer large operating mode, summer small operating mode, winter large operating mode, winter small operating mode, dry - season operating mode, wet - season operating mode, maintenance 1 operating mode, maintenance 2 operating mode... Matching the above operating modes is mainly achieved through the on - off information of the main components, network attack information, and software and hardware pressure plates.

[0087] Step S4 - 2: Construct a traditional strategy table to implement the control strategy. The specific matching elements of the table are the diagnosed fault types and the network topology determined in step S4 - 1.

[0088] Update the strategy according to the fault information and the power grid topology structure, add the basic control measure set in step S2 - 1, and perform dynamic matching and filling of the elements of the traditional strategy table. The specific filling rule model is as follows:

[0089]

[0090] A(X) is the control measure, RX is the removal of the main engine, RL is the removal of the load, FX is the strong excitation, SPPF, FT, BLVF are the output results of SPPFM, TFM, BLVFM in step S3-1, CVQ is the fast valve closing, T p is the component type, JZ is the unit, DC-M is the DC modulation, and DC is the DC pole.

[0091] Step S4-3: Construct a strategy table under network attack, implement fusion control strategy, update strategy according to network attack information and power grid topology, add the new control measure set in step S2-2, and dynamically match and fill the elements of network attack strategy table. The specific filling model is as follows:

[0092]

[0093] Where A(X) is the control measure, ICB is the information channel blocking, N F =1 is the number of faults, P F =MS means a failure occurred at the master station, P F =SS represents a fault in the substation, CCI represents the control channel interlock, SPI represents the stop plate interlock, SSI represents the switch status interlock, FIF, DC-FIF, CLAF, RRAF are the output results of FIFM, DC-FIFM, CLAFM, RRAFM in step S3-2.

[0094] Example 2

[0095] Figure 3 The structural diagram of the power system integrated safety and stability control device provided by the embodiment of the present invention is mainly composed of an AC quantity acquisition board, a switch quantity acquisition board, a start judgment control board, a logic judgment control board, a switch quantity output board, and a power supply board. The information collected by the AC quantity acquisition board and the switch quantity acquisition board is used as the input of the start judgment control board and the logic judgment control board, and the switch quantity output board receives the information of the logic judgment control board as the control execution component, and the start judgment control board also transmits the start information to the logic judgment control board.

[0096] The AC quantity acquisition board mainly collects and processes analog quantities, collects multiple three-phase voltages and currents, and calculates the effective value and power of the collected multiple signals in real time and transmits them to the start judgment control board and the logic judgment control board.

[0097] The switch quantity acquisition board mainly collects and processes the open signals of power grid components and various switch quantity signals, including line tripping signals, contact position signals, etc. In addition, the switch quantity can be used as a state signal quantity to represent various pressure plate information in the power system.

[0098] The startup judgment control board mainly receives the alternating current quantities from the alternating current quantity acquisition board, and monitors the voltage, current, power, etc. in real time, and transmits the change information according to a certain logic.

[0099] The logic judgment control board is used to process the information transmitted by the startup judgment module, that is, various change states (startup information) reflected by the startup logic control board. At the same time, it comprehensively judges the network attacks of the network detection device and the switch quantities collected by the switch quantity acquisition board to give a logic judgment result, and according to the pre-set logic program, sends out various trip signals through the switch quantity output board.

[0100] Such as Figure 4 , the business logics of the startup control board mainly include voltage startup judgment service, current startup judgment service and power startup judgment service. They will continuously and circularly implement the above services and transmit information to the corresponding boards according to the service requirements.

[0101] In one embodiment, the alternating current acquisition board collects and calculates the three-phase voltage and current from the line and calculates their effective values and power, and then transmits the information to the startup judgment control board, and the voltage startup judgment service, current startup judgment service and power startup judgment service will be started.

[0102] The voltage startup judgment service receives the alternating current information from the alternating current quantity acquisition board and monitors the effective value of the voltage in real time.

[0103] The current startup judgment service receives the alternating current information from the alternating current quantity acquisition board and monitors the effective value of the current in real time.

[0104] The power startup judgment service receives the alternating current information from the alternating current quantity acquisition board and monitors the power in real time.

[0105] In one embodiment, the voltage startup judgment service mainly receives the effective value of the voltage from the alternating current quantity acquisition board in real time and monitors whether the effective value of the voltage exceeds the set threshold U s , if it exceeds, it will transmit a voltage startup signal to the logic judgment control board. Similarly, the current startup judgment service and the power startup judgment service also receive the effective value of the current and the power from the alternating current quantity acquisition board in real time, and monitor whether the effective value of the current and the power exceed the set thresholds I s and P s , if it exceeds, it will transmit a current startup signal and power to the logic judgment control board.

[0106] Such as Figure 5 , the business logics of the logic judgment control board include conventional fault judgment service, integrated new type fault judgment service, and fault correction service.

[0107] The three services are in sequence. According to the order of first performing the conventional fault judgment service and then the integrated new type fault judgment service, the fault correction service is finally implemented.

[0108] The conventional fault judgment service is used to judge common general faults in the power system.

[0109] The integrated new fault judgment service is used for new fault judgment against cyberattacks.

[0110] The fault correction service is used for misjudgment correction in the scenario of cyberattacks.

[0111] The above is the entire logical architecture of the integrated security and stability control device, which cooperate with each other to complete the identification and disposal of cyberattacks.

[0112] Embodiment 3

[0113] Embodiment 3 of the present invention provides a terminal device corresponding to Embodiment 1 above. The terminal device can be a processing device for a client, such as a mobile phone, a laptop computer, a tablet computer, a desktop computer, etc., to execute the method of the above embodiment.

[0114] The terminal device of this embodiment includes a memory, a processor, and a computer program stored on the memory; the processor executes the computer program on the memory to implement the steps of the method of Embodiment 1 above.

[0115] In some implementations, the memory can be a high-speed random access memory (RAM: Random Access Memory), and may also include a non-volatile memory, such as at least one disk memory.

[0116] In other implementations, the processor can be a central processing unit (CPU), a digital signal processor (DSP), or various types of general-purpose processors, which are not limited here.

[0117] Embodiment 4

[0118] Embodiment 4 of the present invention provides a computer-readable storage medium corresponding to Embodiment 1 above, on which a computer program / instructions are stored. When the computer program / instructions are executed by a processor, the steps of the method of Embodiment 1 above are implemented.

[0119] A computer-readable storage medium can be a tangible device that holds and stores instructions used by an instruction execution device. A computer-readable storage medium can be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any combination of the above.

[0120] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present application can be implemented in various computer languages. For example, object-oriented programming languages such as Java and interpreted scripting languages such as JavaScript, etc.

[0121] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for realizing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 or multiple blocks.

[0122] These computer program instructions can also be loaded onto a computer or other programmable data processing devices, so that a series of operation steps are executed on the computer or other programmable devices to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable devices provide steps for realizing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 or multiple blocks.

[0123] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present application.

[0124] Obviously, those skilled in the art can make various changes and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A method for integrated safety and stability control of a power system, characterized in that: The following steps are involved: Constructing a strategy table including fault information and network topology, and determining control measures using the strategy table; The elements in the strategy table are determined by the following formula: Among them, A(X) is the control measure, RX is the removal of the main engine, RL is the removal of the load, FX is the strong excitation, SPPF, FT, BLVF are the output results of the fault diagnosis models SPPFM, TFM, BLVFM, CVQ is the fast closing valve, T p is the component type, JZ is the unit, DC-M is the DC modulation, DC is the DC pole, ICB is the information channel blocking, N F =1 is the number of faults, P F =MS means a failure occurred at the master station, P F =SS represents a fault in the substation, CCI is the control channel interlock, SPI is the stop plate interlock, SSI is the switch state interlock, FIF, DC-FIF, CLAF, RRAF are the output results of the fault diagnosis models FIFM, DC-FIFM, CLAFM, RRAFM.

2. The power system integrated safety and stability control method according to claim 1 is characterized in that: The expressions of fault diagnosis models SPPFM, TFM, and BLVFM are: SPPFM={N IR ≥1,N Ud ≥1,N TWJ =2,T(i) NTWJ -T(i-1) NTWJ ≥T C }; TFM={N IR ≥1,N Ud ≥1,N TWJ [1,NWJ=1→3NWJ=1}? BLVFM={U η ≤U r ,IN η (-5)≤U l ,T≥T u }; Among them, N IR Increase the number of phases for current, N Ud is the number of phases of voltage reduction, N TWJ is the number of trip signals, T(i) NTWJ -T(i-1) NTWJ is the time difference between the two-phase tripping signals, T C is the reclosing time, TWJ=1→3TWJ=1 means that a three-phase trip signal appears after a single-phase trip signal, U η is the current voltage percentage, U r is the real-time low voltage of the busbar, U η (-5) is the voltage percentage 5s ago, U l is the busbar pressure loss threshold, T is the delay time, T u Delay for busbar pressure loss confirmation.

3. The power system integrated safety and stability control method according to claim 1 is characterized in that: The expressions of fault diagnosis models FIFM, DC-FIFM, CLAFM, and RRAFM are: FIFM={N TT ≥2,T Ti ≤T Tl }∪{N YK ≥2,T Yi ≤T C }; CLAFM={ΔU - ≥U -MAX ,ΔP≥P MAX ,N dlq =0}; RRAFM = {SPPF = 1, MIT = 1}; Among them, N TT The number of times the main transformer or unit is started or stopped, T Ti The main transformer or unit shutdown interval, T Tl Main transformer or unit maintenance shutdown time threshold, N YK is the number of remote control shots and stops, T C is the reclosing time, ΔU - is the change of the three-phase negative sequence voltage component of the transformer, U -MAX is the negative sequence voltage component change threshold, ΔP is the transformer power change, P MAX is the transformer power change threshold, N dlq is the number of transformer circuit breaker tripping signals, SPPF = 1 represents a single-phase instantaneous fault, MIT = 1 represents a malicious command tripping, T Yi It is the interval time of remote control throwing and stopping.

4. The power system integrated safety and stability control method according to claim 2 or 3, characterized in that: Determine the number of stoppages according to the stoppage criterion model; The investment suspension criterion model is as follows: Where X(t) is the output result of the attack behavior, IJA is the information blocking attack, DTA is the data tampering attack, and D JXZ (t) = 2 means that the second criterion for the start and stop of the unit, main transformer and line at time t is adopted, D DIT (t) = 2 means that the DC pole at time t uses the second criterion for switching on and off; The first criterion for switching on and off the main transformer, line and unit: If the closing position relay is in the closed state and the voltage of the component is greater than the set value, that is, U>U s , if the above conditions are met, it is in operation; if the relay state at the closing position is disconnected and the active power is less than the set value, that is, P<P T , if the above is met, it is in shutdown state; if the active power is greater than the fixed value, that is, P>P T , but the closing position relay is in the disconnected state, P≤P T , satisfying the above is a non-corresponding state; The second criterion for switching on and off the main transformer, line and unit: if the active power is greater than the set value and the current is greater than the threshold value, that is, P>P T 、I>I T , if the above conditions are met, it is in operation; if the active power is less than the set value, and the current is less than the threshold value, that is, P≤P T , I≤I T , if the above conditions are met, it is in shutdown state; The third criterion for the main transformer, line and unit is: if the pressure plate is put into operation and the component voltage is normal, it is in operation if the pressure plate is withdrawn and the component voltage disappears, it is in shutdown if the pressure plate is withdrawn. The first criterion for the DC pole is: if the DC pole transmission power is greater than the set value, that is, P>P s , and there is no DC pole blocking signal, the DC pole is put into operation if the above is met; if the DC pole transmission power is less than the fixed value, that is, P≤P s , and there is a DC pole blocking signal, if the above is met, the DC pole will be shut down; The second criterion for the DC pole is: if the commutation power is greater than the set value, that is, P h >P s , and there is no DC pole blocking signal, the DC pole is shut down if the above is met; if the commutation power is less than the set value, that is, P h ≤P s , and there is a DC pole locking signal. If the above conditions are met, the DC pole can be put into operation.

5. A power system integrated safety and stability control system, comprising a memory, a processor and a computer program stored in the memory; characterized in that: The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 4.

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