CN114047442B

CN114047442B - Fault ride-through detection method, device and system for new energy station

Info

Publication number: CN114047442B
Application number: CN202111609844.2A
Authority: CN
Inventors: 薛水莲; 王治国; 赵廉; 王栋栋; 高攀; 倪铄; 高仁将
Original assignee: Xi'an Dena Testing Co ltd
Current assignee: Xi'an Dena Testing Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-04-26
Anticipated expiration: 2041-12-27
Also published as: CN114047442A

Abstract

The invention discloses a fault ride-through detection method, a device and a system for a new energy station, belonging to the field of new energy stations, the fault ride-through detection system is used for solving the problem that a wind turbine generator in a new energy station does not set corresponding fault ride-through detection capability according to actual fault conditions, and comprises a ride-through capability analysis module, an operation monitoring module, a detection judgment module and a ride-through verification module, the barrier crossing capability analysis module is used for analyzing the barrier crossing capability of the wind generating set in the new energy station, the operation monitoring module is used for monitoring the operation condition of the wind generating set in the new energy station, the detection and judgment module is used for judging the running state of the wind generating set in the new energy station, the fault penetration checking module is used for checking the fault penetration capability of the wind turbine generator in the new energy station, and the corresponding fault penetration detection capability can be conveniently set according to the actual fault condition of the wind turbine generator in the new energy station.

Description

Fault ride-through detection method, device and system for new energy station

Technical Field

The invention belongs to the field of new energy stations, relates to a fault ride-through detection technology, and particularly relates to a fault ride-through detection method, device and system for a new energy station.

Background

The new energy station refers to all equipment below a grid-connected point of a wind power plant or a photovoltaic power station which is connected into a power system in a centralized mode, and the equipment comprises a transformer, a bus, a circuit, a converter, an energy storage unit, a wind turbine generator, a photovoltaic power generation system, reactive power regulation equipment, auxiliary equipment and the like.

In the prior art, a relatively general method is adopted for detecting the fault ride-through capability of a wind turbine generator in a new energy station, a relatively high fault ride-through detection capability is usually set for the wind turbine generator in the new energy station to avoid power faults, and a corresponding fault ride-through detection capability is not set according to the actual fault condition of the wind turbine generator in the new energy station, so that the waste of power resources is easily caused.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a fault ride-through detection method, device and system for a new energy station.

The technical problem to be solved by the invention is as follows:

(1) how to set corresponding fault ride-through detection capability for the wind turbine generator in the new energy station according to the actual fault condition of the wind turbine generator in the new energy station.

The purpose of the invention can be realized by the following technical scheme:

a fault crossing detection device for a new energy station comprises detection equipment and a server, wherein a processor is arranged in the detection equipment, the processor is in communication connection with a data acquisition module, an alarm and the server, and the server is connected with a barrier crossing capability analysis module, an operation monitoring module, a detection and judgment module, a barrier crossing checking module and a maintenance terminal;

the data acquisition module is used for acquiring the operation data and the performance data of the wind turbine generator set in the new energy field station and sending the operation data and the performance data to the processor;

a processor for sending the operational data and the performance data to a server;

the server stores preset barrier penetration capacity value range intervals of different barrier penetration capacity grades of the wind turbine generator, preset operation data of the wind turbine generator and an operation deviation threshold value of the wind turbine generator in the new energy station, and sends the operation data to the operation monitoring module and the performance data to the barrier penetration capacity analysis module;

the barrier penetration capability analysis module is used for analyzing the barrier penetration capability of the wind turbine generator in the new energy station, and analyzing to obtain the barrier penetration capability grade of the wind turbine generator and a corresponding barrier penetration capability value;

the operation monitoring module is used for monitoring the operation condition of the wind turbine generator set in the new energy station and monitoring to obtain an operation abnormal signal or an operation deviation value of the wind turbine generator set in the new energy station;

the detection and judgment module is used for judging the running state of the wind turbine generator in the new energy station and judging to obtain the fault level of the wind turbine generator in the new energy station;

the barrier crossing checking module is used for checking the fault crossing capability of the wind generating set in the new energy station, and generating a barrier crossing matching signal, a barrier crossing sufficient signal or a barrier crossing deficient signal through checking and feeding back to the server;

the alarm is used for detecting and alarming the wind turbine generator set in the new energy station;

and the maintenance terminal is used for maintaining the wind turbine generator.

A processor is arranged in detection equipment and comprises a processor and a server, the processor is in communication connection with a data acquisition module, an alarm and the server, the server is connected with a barrier-crossing capability analysis module, an operation monitoring module, a detection judgment module, a barrier-crossing checking module and a maintenance terminal, and the alarm is used for detecting and alarming a wind turbine generator set in a new energy station; the data acquisition module is used for acquiring operation data and performance data of a wind turbine generator in the new energy field station and sending the operation data and the performance data to the processor, the processor sends the operation data and the performance data to the server, the server sends the operation data to the operation monitoring module, and the server sends the performance data to the barrier penetration capability analysis module; the server stores preset barrier penetration capacity value range intervals of different barrier penetration capacity grades of the wind turbine generator, preset operation data of the wind turbine generator and an operation deviation threshold value of the wind turbine generator in the new energy station;

the barrier penetration capability analysis module is used for analyzing the barrier penetration capability of the wind turbine generator in the new energy station, analyzing the barrier penetration capability level of the wind turbine generator to obtain the barrier penetration capability level of the wind turbine generator and sending the barrier penetration capability level to the server; the operation monitoring module is used for monitoring the operation condition of the wind turbine generator in the new energy station, monitoring to obtain an operation abnormal signal or an operation deviation value YPu of the wind turbine generator in the new energy station and feeding the operation abnormal signal or the operation deviation value YPu back to the server; the system comprises a server, a detection and judgment module, a barrier penetration verification module and a barrier penetration verification module, wherein the server sends an operation deviation value of a wind turbine generator in a new energy station to the detection and judgment module, the detection and judgment module is used for judging the operation state of the wind turbine generator in the new energy station and judging to obtain the fault level of the wind turbine generator in the new energy station, the detection and judgment module feeds the fault level of the wind turbine generator in the new energy station back to the server, the server sends the barrier penetration capability level and the fault level of the wind turbine generator to the barrier penetration verification module, and the barrier penetration verification module is used for verifying the fault penetration capability of the wind turbine generator in the new energy station and generating a barrier penetration matching signal, a barrier penetration sufficient signal or a barrier penetration deficient signal to be fed back to the server;

if the server receives the barrier-wearing matching signal or the barrier-wearing sufficient signal, no operation is performed, if the server receives the barrier-wearing deficiency signal or the barrier-wearing abnormal signal, the barrier-wearing deficiency signal or the operation abnormal signal is sent to the processor, the processor generates an alarm instruction after receiving the barrier-wearing deficiency signal or the operation abnormal signal and loads the alarm instruction to the alarm, the alarm works to give an alarm sound after receiving the alarm instruction, meanwhile, the server generates a maintenance signal and sends the maintenance signal to the maintenance terminal, and the maintenance terminal corresponding to the wind turbine generator in the new energy station maintains the wind turbine generator after receiving the maintenance signal.

Further, the operation data comprise an operation current value, an operation voltage value and an operation temperature value of the wind turbine generator set in the new energy station;

the preset operation data comprise a preset operation current value, a preset operation voltage value and a preset operation temperature value of the wind turbine generator in the new energy field station;

the performance data comprises the number of braking resistors of the wind turbine generator in the new energy field station, the wind power access capacity of the wind turbine generator in the new energy field station, the capacity of a converter in the wind turbine generator in the new energy field station and the current amount of a stator winding of a doubly-fed generator in the wind turbine generator in the new energy field station.

Further, the analysis process of the barrier penetration ability analysis module is specifically as follows:

the method comprises the following steps: marking the corresponding wind turbine generator in the new energy station as u, u =1, 2, … …, z, z being positive integers; obtaining the number of braking resistors of the wind turbine generator, and marking the number of braking resistors as ZDZu;

step two: acquiring wind power access capacity of a wind turbine generator, and marking the wind power access capacity as FJRu; acquiring the capacity of a converter in the wind turbine generator set, and recording the capacity as the converter capacity BRu; obtaining the current magnitude of a stator winding of a double-fed generator in a wind turbine generator set, and marking the current magnitude of the stator winding as DDLu;

step three: combination formula

Calculating to obtain a barrier penetration capability value ZCnu of a wind turbine generator set in the new energy station; in the formula, a1 and a2 are proportionality coefficients with fixed values, a1 and a2 are both greater than zero, and e is a natural constant;

step four: acquiring preset barrier penetration capability value range intervals of different barrier penetration capability grades stored in a server;

step five: if the obstacle-crossing capability value of the wind turbine belongs to the range of the preset obstacle-crossing capability value of the obstacle-crossing capability level, the preset obstacle-crossing capability value is set as the obstacle-crossing capability value of the wind turbine, and meanwhile the obstacle-crossing capability level of the wind turbine is obtained.

Further, the monitoring process of the operation monitoring module is specifically as follows:

step S1: acquiring the operation time of a wind turbine generator set in the new energy station, and setting a plurality of time points in the operation time;

step S2: acquiring an operating current value, an operating voltage value and an operating temperature value of the new energy station at a plurality of time points;

step S3: acquiring preset operation data of the wind turbine generator to obtain a preset operation current value, a preset operation voltage value and a preset operation temperature value of the wind turbine generator;

step S4: if the operation current value at any time point is greater than or equal to the preset operation current value of the wind turbine generator, the operation voltage value is greater than or equal to the preset operation voltage value of the wind turbine generator or the operation temperature value is greater than or equal to the preset operation temperature value of the wind turbine generator, generating an operation abnormal signal, otherwise, entering the next step;

step S5: calculating a difference value between the operation current value and a preset operation current value and taking an absolute value to obtain an operation current difference CYLu, calculating a difference value between the operation voltage value and a preset operation voltage value and taking an absolute value to obtain an operation voltage difference CYYu, and calculating a difference value between the operation temperature value and a preset operation temperature value and taking an absolute value to obtain an operation temperature difference CYWu;

step S6: combination formula

And calculating to obtain an operation deviation value YPu of the wind turbine set in the new energy station.

Further, the determination steps of the detection determination module are specifically as follows:

step SS 1: acquiring a running deviation threshold of a wind turbine set in the new energy station;

step SS 2: if the operation deviation value of the wind turbine generator set in the new energy station is greater than or equal to the operation deviation threshold value, entering the next step;

if the operation deviation value of the wind turbine generator set in the new energy station is smaller than the operation deviation threshold value, no operation is performed;

step SS 3: comparing the operation deviation value of the new energy station with a fault level threshold value;

step SS 4: if YPu is less than X1, the fault level of the wind turbine generator set in the new energy station is a third-level fault level;

step SS 5: if the X1 is not more than YSu and is more than X2, the fault level of the wind turbine generator in the new energy station is a secondary fault level;

step SS 6: if the X2 is less than or equal to YSu, the fault level of the wind turbine generator in the new energy station is a primary fault level; wherein X1 and X2 are both fault level thresholds, and X1 < X2.

Furthermore, the barrier-through capability level of the wind turbine generator comprises a first-level barrier-through capability level, a second-level barrier-through capability level and a third-level barrier-through capability level, the barrier-through capability of the first-level barrier-through capability level is larger than that of the second-level barrier-through capability level, and the barrier-through capability of the second-level barrier-through capability level is larger than that of the third-level barrier-through capability level;

the first level barrier-penetration capacity level corresponds to the first level fault level, the second level barrier-penetration capacity level corresponds to the second level fault level, and the third level barrier-penetration capacity level corresponds to the third level fault level.

Further, the barrier-crossing checking module specifically comprises the following checking process:

step P1: if the wind turbine generator in the new energy station is in a first-level fault level and the breakdown capability level of the wind turbine generator is in a first-level breakdown capability level, generating a breakdown matching signal;

if the wind turbine generator in the new energy station is in a first-level fault level, and the breakdown capacity level of the wind turbine generator is in a second-level breakdown capacity level or a third-level breakdown capacity level, generating a breakdown lack signal;

step P2: if the wind turbine generator in the new energy station is in a secondary fault level and the breakdown capability level of the wind turbine generator is in a primary breakdown capability level, generating a sufficient breakdown signal;

if the wind turbine generator in the new energy station is in a secondary fault level and the breakdown capability level of the wind turbine generator is in a secondary breakdown capability level, generating a breakdown matching signal;

if the wind turbine generator in the new energy station is in a secondary fault level and the breakdown capability level of the wind turbine generator is in a tertiary breakdown capability level, generating a breakdown lack signal;

step P3: if the wind turbine generator in the new energy station is in a third-level fault level and the barrier penetration capability level of the wind turbine generator is in a first-level barrier penetration capability level or a second-level barrier penetration capability level, generating a sufficient barrier penetration signal;

and if the wind turbine generator in the new energy station is in a third-level fault level and the barrier penetration capability level of the wind turbine generator is in a third-level barrier penetration capability level, generating a barrier penetration matching signal.

A fault ride-through detection method for a new energy station comprises the following specific steps:

step S101, a data acquisition module acquires operation data and performance data of a wind turbine generator in a new energy field station, the operation data is sent to an operation monitoring module, and the performance data is sent to a barrier penetration capability analysis module;

step S102, analyzing the obstacle crossing capability of the wind turbine generator in the new energy station by using an obstacle crossing capability analysis module to obtain the obstacle crossing capability grade of the wind turbine generator and sending the obstacle crossing capability grade to an obstacle crossing checking module;

step S103, monitoring the operation condition of the wind turbine generator set in the new energy station through the operation monitoring module, monitoring to obtain an operation abnormal signal or feeding back an operation deviation value to the server, and sending the operation deviation value of the wind turbine generator set in the new energy station to the detection judging module;

step S104, judging the running state of the wind turbine generator in the new energy station by using a detection judging module, judging to obtain the fault level of the wind turbine generator in the new energy station and sending the fault level to a barrier-through checking module;

step S105, checking the fault penetration capability of the wind turbine generator in the new energy station through a penetration checking module, and generating a penetration matching signal, a penetration sufficient signal or a penetration deficient signal after the penetration capability grade of the wind turbine generator is compared with the fault grade;

and S106, when the server receives the barrier-wearing lack signal or the operation abnormal signal, the alarm works to give an alarm, and the server generates a maintenance signal and sends the maintenance signal to the maintenance terminal.

Compared with the prior art, the invention has the beneficial effects that:

the method comprises the steps of analyzing the obstacle crossing capability of the wind turbine generator in the new energy field station by using an obstacle crossing capability analysis module to obtain the obstacle crossing capability grade of the wind turbine generator, monitoring the operation condition of the wind turbine generator in the new energy field station by using an operation monitoring module to obtain an abnormal operation signal or an operation deviation value, sending the operation deviation value of the wind turbine generator in the new energy field station to a detection and judgment module, judging the operation state of the wind turbine generator in the new energy field station by using the detection and judgment module, and judging to obtain the fault grade of the wind turbine generator in the new energy field station;

according to the method, the breakdown capability grade and the fault grade of the wind turbine generator are sent to the breakdown checking module, the fault penetration capability of the wind turbine generator in the new energy station is checked through the breakdown checking module, a breakdown matching signal, a breakdown sufficient signal or a breakdown insufficient signal is generated after the breakdown capability grade of the wind turbine generator is compared with the fault grade, an alarm is generated when an alarm works and gives out an alarm when a breakdown insufficient signal or an abnormal operation signal is generated, a maintenance signal is generated and sent to a maintenance terminal, and the maintenance terminal is used for maintaining the wind turbine generator in the new energy station.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is an overall system block diagram of the present invention;

fig. 2 is a flow chart of the operation of the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1, the new energy station fault crossing detection device comprises detection equipment and a server, wherein a processor is arranged in the detection equipment, the processor is in communication connection with a data acquisition module, an alarm and the server, and the server is connected with a barrier crossing capability analysis module, an operation monitoring module, a detection and judgment module, a barrier crossing verification module and a maintenance terminal;

the new energy station is a wind power plant which is connected to the power system in a centralized manner or all equipment below a grid-connected point of a photovoltaic power station, and comprises a transformer, a bus, a circuit, a converter, energy storage, a wind turbine, a photovoltaic power generation system, reactive power regulation equipment, auxiliary equipment and the like;

the alarm is arranged on the wind turbine set in the new energy station and used for detecting and alarming the wind turbine set in the new energy station; the data acquisition module is used for acquiring operation data and performance data of a wind turbine generator in the new energy field station and sending the operation data and the performance data to the processor, the processor sends the operation data and the performance data to the server, the server sends the operation data to the operation monitoring module, and the server sends the performance data to the barrier penetration capability analysis module;

the server stores preset barrier penetration capacity value range intervals of different barrier penetration capacity grades of the wind turbine generator, preset operation data of the wind turbine generator and an operation deviation threshold value of the wind turbine generator in the new energy station;

the operation data comprise an operation current value, an operation voltage value, an operation temperature value and the like of a wind turbine generator in the new energy field station, the preset operation data comprise a preset operation current value, a preset operation voltage value, a preset operation temperature value and the like of the wind turbine generator in the new energy field station, and the performance data comprise the number of brake resistors of the wind turbine generator in the new energy field station, the wind power access capacity of the wind turbine generator in the new energy field station, the capacity of a converter in the wind turbine generator in the new energy field station, the stator winding current quantity of a doubly-fed generator in the wind turbine generator in the new energy field station and the like;

the obstacle crossing capability analysis module is used for analyzing the obstacle crossing capability of the wind turbine generator in the new energy station, and the analysis process is as follows:

step three: combination formula

Calculating to obtain a barrier penetration capability value ZCnu of a wind turbine generator set in the new energy station; in the formula (I), the compound is shown in the specification,a1 and a2 are both proportional coefficients with fixed values, the values of a1 and a2 are both greater than zero, e is a natural constant, and in specific implementation, the value of a1 can be 1.246115, and the value of a2 can be 2.0147461, as long as the value of the proportional coefficients does not influence the positive-negative ratio relationship between the parameters and the result value;

step five: if the barrier penetration capability value of the wind turbine generator belongs to the range of the preset barrier penetration capability value of the barrier penetration capability level, setting the preset barrier penetration capability value as the barrier penetration capability value of the wind turbine generator, and obtaining the barrier penetration capability level of the wind turbine generator at the same time;

the barrier penetration capability analysis module sends the barrier penetration capability grade of the wind turbine generator to a server, and the server sends the barrier penetration capability grade of the wind turbine generator to a barrier penetration checking module;

the operation monitoring module is used for monitoring the operation condition of the wind generating set in the new energy station, and the monitoring process is as follows:

step S6: combination formula

Calculating to obtain an operation deviation value YPu of a wind turbine set in the new energy station; in the formula, b1, b2 and b3 are all weight coefficients with fixed values, the values of b1, b2 and b3 are all greater than zero, b1+ b2+ b3=1, in specific implementation, the value of b1 may be 0.25, the value of b2 may be 0.24, and the value of b3 may be 0.51, as long as the value of the weight coefficients does not affect the positive-negative ratio relationship between the parameters and the result value;

the operation monitoring module feeds back an operation abnormal signal or an operation deviation value YPu of a wind turbine generator set in the new energy field station to the server, if the server receives the operation abnormal signal, the operation abnormal signal is sent to the processor, the processor generates an alarm instruction according to the operation abnormal signal and loads the alarm instruction to the alarm, the alarm works to give an alarm sound after receiving the alarm instruction, meanwhile, the server generates a maintenance signal and sends the maintenance signal to the maintenance terminal, and the maintenance terminal corresponding to the wind turbine generator set in the new energy field station maintains the wind turbine generator set after receiving the maintenance signal;

the server sends the running deviation value of the wind turbine generator set in the new energy station to the detection and judgment module, the detection and judgment module is used for judging the running state of the wind turbine generator set in the new energy station, and the judgment steps are as follows:

step SS 6: if the X2 is less than or equal to YSu, the fault level of the wind turbine generator in the new energy station is a primary fault level; wherein X1 and X2 are both fault level thresholds, and X1 < X2;

specifically, the barrier-through capability level of the wind turbine generator comprises a first-level barrier-through capability level, a second-level barrier-through capability level and a third-level barrier-through capability level, wherein the barrier-through capability of the first-level barrier-through capability level is greater than that of the second-level barrier-through capability level, and the barrier-through capability of the second-level barrier-through capability level is greater than that of the third-level barrier-through capability level;

the primary barrier penetration capacity grade corresponds to the primary fault grade, the secondary barrier penetration capacity grade corresponds to the secondary fault grade, and the tertiary barrier penetration capacity grade corresponds to the tertiary fault grade;

the detection and judgment module feeds back the fault level of the wind turbine generator in the new energy field station to the server, the server sends the fault level of the wind turbine generator in the new energy field station to the barrier-through checking module, the barrier-through checking module is used for checking the fault-through capacity of the wind turbine generator in the new energy field station, and the checking process is as follows:

if the wind turbine generator in the new energy station is in a third-level fault level and the breakdown capability level of the wind turbine generator is in a third-level breakdown capability level, generating a breakdown matching signal;

the barrier-crossing checking module feeds back a barrier-crossing matching signal, a barrier-crossing sufficient signal or a barrier-crossing deficient signal to the server, and if the server receives the barrier-crossing matching signal or the barrier-crossing sufficient signal, no operation is performed;

if the server receives the obstacle-crossing deficiency signal, the obstacle-crossing deficiency signal is sent to the processor, the processor generates an alarm instruction to load to the alarm after receiving the obstacle-crossing deficiency signal, the alarm works to send out an alarm sound after receiving the alarm instruction, meanwhile, the server generates a maintenance signal to be sent to the maintenance terminal, and the maintenance terminal corresponding to the wind turbine generator in the new energy station maintains the wind turbine generator after receiving the maintenance signal.

Based on another concept of the same invention, a new energy station fault crossing detection system is provided, and comprises a processor and a server, wherein the processor is in communication connection with a data acquisition module, an alarm and the server, and the server is connected with a barrier-crossing capability analysis module, an operation monitoring module, a detection and judgment module, a barrier-crossing checking module and a maintenance terminal;

step three: combination formula

Calculating to obtain a barrier penetration capability value ZCnu of a wind turbine generator set in the new energy station; in the formula, a1 and a2 are both proportional coefficients with fixed values, a1 and a2 both have values greater than zero, e is a natural constant, and in specific implementation, a1 can take a value of 1.246115 and a2 can take a value of 2.0147461, so long as the value of the proportional coefficients does not affect the positive-negative ratio relationship between the parameters and the result value;

step S6: combination formula

A fault ride-through detection system of a new energy station is characterized in that when the fault ride-through detection system works, a data acquisition module is used for acquiring operation data and performance data of a wind turbine generator set in the new energy station and sending the operation data and the performance data to a processor, the processor sends the operation data and the performance data to a server, and the server sends the operation data to an operation monitoring module and sends the performance data to a fault ride-through capability analysis module;

meanwhile, the server stores preset penetration resistance value range intervals of different penetration resistance levels of the wind turbine generator, preset operation data of the wind turbine generator and an operation deviation threshold value of the wind turbine generator in the new energy station;

analyzing the obstacle crossing capability of the wind turbine generator in the new energy station through an obstacle crossing capability analysis module to obtain the braking resistance number ZDZu, the wind power access capacity FJRu, the converter capacity BRu and the stator winding current amount DDLu of the wind turbine generator, and combining a formula

Calculating to obtain a barrier penetration capability value ZCnu of a wind turbine generator in the new energy station, then obtaining preset barrier penetration capability value range sections of different barrier penetration capability levels stored in a server, setting the preset barrier penetration capability value as a barrier penetration capability value of the wind turbine generator if the barrier penetration capability value of the wind turbine generator belongs to the preset barrier penetration capability value range section of the barrier penetration capability level, and simultaneously obtaining the barrier penetration capability level of the wind turbine generator, sending the barrier penetration capability level of the wind turbine generator and the corresponding barrier penetration capability value ZCnu to the server by a barrier penetration capability analysis module, and sending the barrier penetration capability level of the wind turbine generator and the corresponding barrier penetration capability value ZCnu to a barrier penetration verification module by the server;

monitoring the operation condition of the wind turbine generator in the new energy field station through an operation monitoring module, acquiring the operation time of the wind turbine generator in the new energy field station, setting a plurality of time points in the operation time, then acquiring the operation current value, the operation voltage value and the operation temperature value of the new energy field station at the plurality of time points, acquiring preset operation data of the wind turbine generator, acquiring the preset operation current value, the preset operation voltage value and the preset operation temperature value of the wind turbine generator, if the operation current value at any time point is greater than or equal to the preset operation current value of the wind turbine generator, the operation voltage value is greater than or equal to the preset operation voltage value of the wind turbine generator or the operation temperature value is greater than or equal to the preset operation temperature value of the wind turbine generator, generating an operation abnormal signal, calculating the difference value of the operation current value and the preset operation current value, and completely removing the difference valueCalculating the difference value between the operation voltage value and the preset operation voltage value and taking the absolute value to obtain the operation voltage difference CYYU, calculating the difference value between the operation temperature value and the preset operation temperature value and taking the absolute value to obtain the operation temperature difference CYWu, combining the formula

The operation deviation value YPu of the wind turbine generator in the new energy station is obtained through calculation, the operation monitoring module feeds back an operation abnormal signal or the operation deviation value YPu of the wind turbine generator in the new energy station to the server, if the server receives the operation abnormal signal, the operation abnormal signal is sent to the processor, the processor generates an alarm instruction according to the operation abnormal signal and loads the alarm instruction to the alarm, the alarm works to give an alarm sound after receiving the alarm instruction, meanwhile, the server generates a maintenance signal and sends the maintenance signal to the maintenance terminal, the maintenance terminal corresponding to the wind turbine generator in the new energy station maintains the wind turbine generator after receiving the maintenance signal, and the operation deviation value of the wind turbine generator in the new energy station is sent to the detection judging module;

judging the running state of the wind turbine set in the new energy station through a detection judging module to obtain a running deviation threshold value of the wind turbine set in the new energy station, if the running deviation value of the wind turbine set in the new energy station is smaller than the running deviation threshold value, no operation is carried out, if the running deviation value of the wind generating set in the new energy station is greater than or equal to the running deviation threshold value, comparing the operation deviation value of the new energy station with a fault level threshold, if YPu is less than X1, the fault grade of the wind turbine generator set in the new energy station is a third-level fault grade, if X1 is not more than YSu and is more than X2, the fault grade of the wind turbine generator set in the new energy station is a secondary fault grade, if X2 is less than or equal to YSu, the fault grade of the wind turbine generator in the new energy station is a first-grade fault grade, the detection and judgment module feeds the fault grade of the wind turbine generator in the new energy station back to the server, and the server sends the fault grade of the wind turbine generator in the new energy station to the barrier-through checking module;

checking the fault penetration capability of the wind turbine generator in the new energy station by a barrier penetration checking module, if the wind turbine generator in the new energy station is in a primary fault level and the barrier penetration capability level of the wind turbine generator is in a primary barrier penetration capability level, generating a barrier penetration matching signal, if the wind turbine generator in the new energy station is in a primary fault level and the barrier penetration capability level of the wind turbine generator is in a secondary barrier penetration capability level or a tertiary barrier penetration capability level, generating a barrier penetration lack signal, if the wind turbine generator in the new energy station is in a secondary fault level and the barrier penetration capability level of the wind turbine generator is in a primary barrier penetration capability level, generating a barrier penetration sufficient signal, if the wind turbine generator in the new energy station is in a secondary fault level and the barrier penetration capability level of the wind turbine generator is in a secondary barrier penetration capability level, generating a barrier penetration matching signal, and if the wind turbine generator in the new energy station is in a secondary fault level, and the breakdown capacity grade of the wind turbine generator is a third-level breakdown capacity grade, a breakdown lack signal is generated, if the wind turbine generator in the new energy station is a third-level fault grade, and the breakdown capacity grade of the wind turbine generator is a first-level breakdown capacity grade or a second-level breakdown capacity grade, a sufficient breakdown signal is generated, if the wind turbine generator in the new energy station is a third-level fault grade, and the breakdown capacity grade of the wind turbine generator is a third-level breakdown capacity grade, a breakdown matching signal is generated, a breakdown verification module feeds back the breakdown matching signal, the sufficient breakdown signal or the insufficient breakdown signal to a server, if the server receives the breakdown matching signal or the sufficient breakdown signal, no operation is performed, if the server receives the breakdown lack signal, the breakdown lack signal is sent to a processor, the processor receives the breakdown lack signal and then generates an alarm instruction to be loaded to an alarm, the alarm receives the alarm command and then works to give out an alarm sound, meanwhile, the server generates a maintenance signal and sends the maintenance signal to the maintenance terminal, and the maintenance terminal corresponding to the wind turbine generator in the new energy station receives the maintenance signal and then maintains the wind turbine generator.

The formulas are all calculated by removing dimensions and taking numerical values thereof, the formulas are one formula which is obtained by acquiring a large amount of data and performing software simulation on the data to obtain the latest real situation, preset parameters in the formulas are set by technicians in the field according to the actual situation, the size of the coefficient is a specific numerical value obtained by quantizing each parameter, the subsequent comparison is convenient, and the size of the coefficient depends on the amount of sample data and the initial setting of the corresponding humidity coefficient for each group of sample data by the technicians in the field; as long as the proportional relationship between the parameters and the quantized values is not affected.

As shown in fig. 2, based on another concept of the same invention, a fault ride-through detection method for a new energy station is proposed, which includes the following steps:

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The fault ride-through detection system of the new energy station is characterized by comprising detection equipment and a server, wherein a processor is arranged in the detection equipment, the processor is in communication connection with a data acquisition module, an alarm and the server, the server is connected with a barrier-wearing capacity analysis module, an operation monitoring module, a detection judgment module, a barrier-wearing verification module and a maintenance terminal, and the alarm is used for detecting and alarming a wind generating set in the new energy station; the data acquisition module is used for acquiring operation data and performance data of a wind turbine generator in the new energy field station and sending the operation data and the performance data to the processor, the processor sends the operation data and the performance data to the server, the server sends the operation data to the operation monitoring module, and the server sends the performance data to the barrier penetration capability analysis module; the server stores preset barrier penetration capacity value range intervals of different barrier penetration capacity grades of the wind turbine generator, preset operation data of the wind turbine generator and an operation deviation threshold value of the wind turbine generator in the new energy station;

step three: combination formula

the barrier penetration capability analysis module analyzes the barrier penetration capability grade of the wind turbine generator and sends the barrier penetration capability grade to the server; the operation monitoring module is used for monitoring the operation condition of the wind generating set in the new energy station, and the monitoring process is as follows:

step S6: combination formula

Calculating to obtain an operation deviation value YPu of a wind turbine set in the new energy station; in the formula, b1, b2 and b3 are all weight coefficients with fixed numerical values, the values of b1, b2 and b3 are all larger than zero, and b1+ b2+ b3= 1;

the operation monitoring module is used for monitoring an operation abnormal signal or an operation deviation value YPu of a wind turbine set in the new energy station and feeding back the operation abnormal signal or the operation deviation value YPu to the server; the server sends the running deviation value of wind turbine generator in the new energy field station to the detection and judgment module, the detection and judgment module is used for judging the running state of the wind turbine generator in the new energy field station, and judges the fault level of the wind turbine generator in the new energy field station, the detection and judgment module feeds back the fault level of the wind turbine generator in the new energy field station to the server, the server sends the fault penetrating capacity level and the fault level of the wind turbine generator to the fault penetrating verification module, the fault penetrating verification module is used for verifying the fault penetrating capacity of the wind turbine generator in the new energy field station, and the verification process is specifically as follows:

the barrier crossing checking module feeds back a barrier crossing matching signal, a barrier crossing sufficient signal or a barrier crossing lack signal generated by checking to the server;

2. The fault ride-through detection system for the new energy station according to claim 1, wherein the operation data comprises an operation current value, an operation voltage value and an operation temperature value of a wind turbine set in the new energy station;

3. The system according to claim 1, wherein the determination steps of the detection determination module are as follows:

4. The new energy station fault crossing detection system as claimed in claim 3, wherein the breakdown capability levels of the wind turbine generator set include a first breakdown capability level, a second breakdown capability level and a third breakdown capability level, the breakdown capability of the first breakdown capability level is greater than that of the second breakdown capability level, and the breakdown capability of the second breakdown capability level is greater than that of the third breakdown capability level;

5. The new energy station fault ride-through detection device is applied to the new energy station fault ride-through detection system of any one of claims 1 to 4, and comprises detection equipment and a server, wherein a processor is arranged in the detection equipment, the processor is in communication connection with a data acquisition module, an alarm and the server, and the server is connected with a barrier-wearing capacity analysis module, an operation monitoring module, a detection judgment module, a barrier-wearing verification module and a maintenance terminal;

6. A fault ride-through detection method for a new energy station, which is based on the fault ride-through detection system for the new energy station of any one of claims 1 to 4, and comprises the following specific steps: