CN-121474067-B - Wind turbine generator system safe operation regulation and control system

CN121474067BCN 121474067 BCN121474067 BCN 121474067BCN-121474067-B

Abstract

The invention relates to the technical field of operation regulation and control, in particular to a safe operation regulation and control system of a wind turbine generator, which comprises a state sensing module, a fault coupling identification module, a state migration control module, a regulation and control strategy screening module and an interface execution isolation module. According to the invention, a transition path sequence is formed by extracting the historical operation state label and the state transition characteristic, so that the state transition mechanism is controlled in a refined mode, matching is carried out on a target parameter interval in the process of screening a control instruction, the regulation and control action incompatible with the current working condition is avoided, the risk event is judged by combining the transient electric parameter change trend before the instruction is executed, and the interface authority isolation strategy is set, so that the fault identification precision and response pertinence are improved, the execution abnormality of the regulation and control instruction caused by the sudden working condition is effectively avoided, and the safety robustness of the whole-period operation of the wind turbine generator and the real-time closed-loop consistency of the regulation and control effect are improved.

Inventors

LI FEI
YU KONGLI
LIU HAIBO
Lian Yangwei
Lian Weixi
HONG WEI
TANG ZHENGHUA

Assignees

江西龙源新能源有限公司

Dates

Publication Date: 20260512
Application Date: 20251112

Claims (8)

1. A wind turbine generator system safe operation regulation and control system, the system comprising: The state sensing module acquires operation parameters acquired by the SCADA system in the wind turbine, carries out single-period difference on a combined trend sequence of current, temperature rise and output power, judges whether continuous inversion occurs in a fluctuation direction in three periods and the maximum difference exceeds a single-period change threshold value, and generates an operation state parameter fluctuation feature set; The fault coupling identification module judges whether a combined coupling difference value exceeds a set fault coupling critical threshold value based on the running state parameter fluctuation feature set, marks a corresponding running condition node as a fault high coupling point and obtains fault coupling node positioning information; The state migration control module extracts a historical instruction response period, a state switching rate and an operating state residence time average value among state pairs according to the fault coupling node positioning information, calculates whether a migration association value exceeds a state transition trigger reference value, sets the state pairs as paths to be transferred, and generates a state transition path identification sequence; and the regulation strategy screening module acquires an instruction scheme set bound by an endpoint state based on the state transition path identification sequence, judges whether a conflict item exists between the current operation parameter and the instruction requirement, removes a control action with unmatched parameters, and generates a regulation scheme execution list.
2. The wind turbine generator system safe operation regulation and control system according to claim 1, wherein the running state parameter fluctuation feature set comprises wind wheel rotation period difference statistics, output power fluctuation rate samples and temperature rise time sequence fluctuation indexes, the fault coupling node positioning information comprises high risk state combination point identification, parameter coupling strength ordering labels and state label indexes in a combination interval, the state transition path identification sequence is specifically a migration state chain number set, a state association probability sequence set and a running state transition path pointing index table, and the regulation and control scheme execution list comprises an effective instruction code number set, parameter matching success instruction identification and a state target corresponding instruction path number.
3. The wind turbine generator system safe operation regulation and control system according to claim 2, wherein the state sensing module comprises: the data acquisition sub-module acquires operation parameters acquired by the SCADA system in the wind turbine, wherein the operation parameters comprise wind wheel rotation speed, current value, voltage value, temperature rise value and output power value, monitors rotation speed data of a wind wheel blade root sensor, voltage data of a generator bus voltage node and power output data of a power channel of a pitch system, invokes a measurement time sequence and establishes a basic data matrix to obtain operation parameter basic information; The slope extraction submodule extracts three groups of sequences of current, temperature rise and output power based on the basic information of the operation parameters, calculates the average slope change value of the sequences in adjacent time periods, extracts a difference value sample of the current period and the previous period from single period difference, combines the standard time interval of the current measurement period, calculates and acquires electric quantity disturbance responsivity, screens samples with disturbance responsivity exceeding a threshold value interval, and carries out slope anomaly marking to obtain a slope mutation screening result; And the fluctuation identification submodule judges whether a direction reversal signal occurs in three continuous periods in the current, temperature rise and output power sequences according to the slope mutation screening result, identifies the sample sequence number corresponding to the maximum fluctuation value, screens the range of a time window, calculates a fluctuation extreme value interval by combining the difference between the maximum value in the difference sample and the period average fluctuation threshold value, and generates an operation state parameter fluctuation feature set.
4. A wind turbine safety operation regulation system according to claim 3, wherein the fault coupling identification module comprises: Based on the running state parameter fluctuation feature set, the parameter pairing submodule combines three parameter pairs into three parameter pairing modes according to the rotating speed change rate, the electromagnetic torque change rate, the voltage drop gradient, the current response slope, the temperature rise increment and the main shaft load change quantity, divides the three parameter pairs into rotating speed-torque, voltage-current and temperature rise-load parameter pairing modes according to the structure coupling relation, establishes a pairing matrix and calls a time synchronization interval value in the current measurement period to generate parameter combination pairing information; The difference value calculation sub-module constructs a slope change vector based on the time step difference value in the measurement period according to the parameter combination pairing information, calculates and obtains coupling deviation coefficients between the combinations, sorts the coupling deviation coefficients of each group, extracts the combination higher than a set coupling critical threshold value, and generates a high-deviation combination sequence; The coupling positioning sub-module calls the high-deviation combination sequence, identifies the corresponding operation condition node number, judges whether the node has historical trend data of the parameter slope mutation in a continuous period, if so, marks the node as a coupling high-risk point and adds the coupling high-risk point to a positioning list, establishes the arrangement sequence information of coupling combinations contained in each node, and generates fault coupling node positioning information.
5. The wind turbine generator system safe operation regulation system of claim 4, wherein the state transition control module comprises: The state pair identification sub-module extracts an operation state label under a high coupling node in the current wind turbine generator according to the fault coupling node positioning information, performs cross comparison with label values in a state label mapping set, calls an adjacent matrix path set among labels, screens a data pair set with associated side weights, and obtains a label adjacent state pair set; The migration judgment submodule extracts a command response period, a state switching rate and an operating state residence time average value corresponding to the state pair according to the label adjacent state pair set, acquires current wind speed fluctuation amplitude and wind wheel torque response time as superposition factors, calculates and acquires a migration intensity value of the state pair, judges whether the migration intensity value exceeds a state transition trigger reference value, marks the state pair as a path to be transferred if the migration intensity value exceeds the state transition trigger reference value, and generates a migration intensity screening result; And the path construction sub-module calls a target state number sequence existing in a state label path dictionary according to the migration intensity screening result, rearranges a node index sequence in the target state sequence, connects a path identification set between a state label and a target state node, establishes label mapping information of the target state path, and generates a state transition path identification sequence.
6. The wind turbine generator system safe operation regulation and control system according to claim 5, wherein the regulation and control strategy screening module comprises: The instruction extraction submodule acquires the state transition path identification sequence, calls a strategy library instruction index table corresponding to the terminal state number, screens the regulation instruction item bound by the current node, extracts the action type, the applicable state number and the regulation target parameter set corresponding to each instruction, and generates a target instruction index set; The parameter verification sub-module is used for calling the running current in the current measurement period, the wind wheel rotating speed change duration and the winding temperature acquisition sequence according to the current peak value range, the wind wheel deceleration time and the winding temperature rise limit value required by each instruction based on the target instruction index set, judging whether each running value is in the instruction requirement threshold value interval or not, and screening effective instruction items meeting constraint requirements to obtain a parameter adaptation screening result; The channel screening submodule is used for matching executable channel numbers in the regulation and control path mapping table according to the effective instruction items based on the parameter adaptation screening result, judging whether the channel is in an available state and not triggering protection limiting logic, eliminating channel items with action conflicts or execution path conflicts, and generating a regulation and control scheme execution list.
7. The wind turbine generator system safe operation regulation system of claim 6, wherein the system further comprises: The interface execution isolation module judges whether an abnormal event that the voltage drop amplitude continuously drops in the instruction period and the current negative jump exceeds the short drop threshold exists or not according to the regulation and control scheme execution list, if yes, the interface issuing authority corresponding to the control instruction is frozen, the interface port state is recorded, and a regulation and control command execution isolation mark is obtained; the regulation command execution isolation mark specifically refers to an interface channel freezing number, a control command waiting list position and a fault state identification label.
8. The wind turbine safety operation regulation system of claim 7, wherein the interface execution isolation module comprises: the signal extraction submodule is used for extracting a sampling sequence and constructing a parameter matrix according to a channel period and generating control signal monitoring information by calling a busbar voltage jump value, current negative slope time slice distribution and wind wheel rotating speed transient response state corresponding to each channel in the controller according to the execution channel number of the control instruction based on the regulation scheme execution list; the abnormal recognition submodule judges whether a voltage value descending trend of more than two continuous time points exists in each record or not according to the periodic sequence of the voltage and the current based on the control signal monitoring information and whether record items with current jump amplitude being larger than a short-time drop threshold value are accompanied or not, and an abnormal channel number set is screened to obtain an abnormal channel index sequence; And the permission freezing submodule calls the abnormal channel index sequence, positions the current state in the interface management unit according to the control instruction number corresponding to the marked channel, judges whether the state is in the execution preposed queue, if so, stops the instruction issuing and records the freezing time point state label and the channel state, establishes a control channel freezing registry, and generates a regulation and control command execution isolation mark.

Description

Wind turbine generator system safe operation regulation and control system Technical Field The invention relates to the technical field of operation regulation and control, in particular to a safe operation regulation and control system of a wind turbine generator. Background The technical field of operation regulation and control belongs to a core link in a wind power technology system, and relates to control and management of aspects such as state monitoring, power output management, energy conversion efficiency regulation, load allocation, abnormal working condition identification and the like of a wind turbine generator in an operation process. The technical field comprises the contents of real-time state monitoring, operation parameter optimization, electric energy output stability adjustment, grid-connected operation coordination, fault detection and diagnosis strategies and the like of the wind turbine, and aims to ensure that the wind turbine can operate efficiently, safely and stably under complex environments such as wind speed fluctuation, grid disturbance and the like. The operation regulation and control technology is usually based on a wind farm SCADA system, a wind resource evaluation model, a power prediction model and a power grid interactive control algorithm, and emphasizes data intercommunication and joint decision mechanism among multiple systems so as to improve the economical efficiency and reliability of the whole wind power system. The wind turbine generator safe operation regulation and control system is an integrated system for wind turbine generator safe control and dynamic regulation, and is mainly used for realizing real-time identification, risk assessment and regulation response of the running state of the wind turbine generator through collection and analysis of parameters such as wind speed, current, voltage, rotating speed, mechanical load, vibration and the like. The system aims to prevent the running efficiency of the wind turbine generator from being reduced or the safety accident from occurring due to abnormal working conditions, further ensure the stability and the service life of wind power equipment, and simultaneously improve the grid-connected quality and the power generation efficiency of a wind power plant. The traditional regulation and control system lacks a periodic trend structure extraction and combination change judgment mechanism in the aspects of parameter fluctuation trend identification and cross-parameter coupling state identification, is difficult to cope with a multiparameter linkage effect caused by working condition mutation, only depends on single-point threshold judgment or static index early warning in a fault identification stage, so that the identification precision of complex fault characteristics is insufficient, a definite state migration path and a response sequence are not established in the aspect of state control, a control instruction is executed only depending on a current state, the problems of out-of-control state jump or control instruction action time lag, power fluctuation, electric load overrun and the like are easily caused, and the control defects are more easily exposed particularly under the condition of quick switching of grid-connected working conditions or extreme weather conditions. Disclosure of Invention The invention aims to solve the defects in the prior art, and provides a safe operation regulation and control system of a wind turbine generator. In order to achieve the purpose, the invention adopts the following technical scheme that the system for regulating and controlling the safe operation of the wind turbine generator comprises: The state sensing module acquires operation parameters acquired by the SCADA system in the wind turbine, carries out single-period difference on a combined trend sequence of current, temperature rise and output power, judges whether continuous inversion occurs in a fluctuation direction in three periods and the maximum difference exceeds a single-period change threshold value, and generates an operation state parameter fluctuation feature set; The fault coupling identification module judges whether a combined coupling difference value exceeds a set fault coupling critical threshold value based on the running state parameter fluctuation feature set, marks a corresponding running condition node as a fault high coupling point and obtains fault coupling node positioning information; The state migration control module extracts a historical instruction response period, a state switching rate and an operating state residence time average value among state pairs according to the fault coupling node positioning information, calculates whether a migration association value exceeds a state transition trigger reference value, sets the state pairs as paths to be transferred, and generates a state transition path identification sequence; and the regulation strategy screening module acquires an instr