CN115508650A - New energy station frequency modulation detection method and system based on multipoint synchronous measurement - Google Patents
New energy station frequency modulation detection method and system based on multipoint synchronous measurement Download PDFInfo
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- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
Abstract
The invention provides a new energy station frequency modulation detection method based on multipoint synchronous measurement, which is characterized by comprising the following steps of: step S1: the server acquires historical measurement information of the new energy station through the database, the server transmits the historical measurement information to the numerical calculation module, and the numerical calculation module calculates according to the received historical measurement information to obtain a historical frequency modulation reference value; step S2: the server sets a reference interval according to the acquired historical frequency modulation reference value; and step S3: the server controls the multi-point measurement module to acquire real-time measurement information of the new energy station, the server transmits the real-time measurement information to the numerical calculation module, and the numerical calculation module calculates according to the received real-time measurement information to obtain a frequency modulation detection reference value; and step S4: the server receives the frequency modulation detection reference value and judges whether frequency modulation is carried out or not in the range interval of the reference interval.
Description
Technical Field
The invention relates to the technical field of frequency modulation detection, in particular to a new energy station frequency modulation detection method and system based on multipoint synchronous measurement.
Background
The new energy station comprises: the device comprises a set of all devices below a wind power station or a solar power station grid-connected point which are connected into a power system in a centralized manner, wherein the set of all devices comprises a transformer, a bus, a circuit, a converter, an energy storage device, a wind turbine generator, photovoltaic power generation equipment, reactive power regulation equipment, auxiliary equipment and the like.
In the prior art, with the continuous development of the science and technology level of China, new energy is more and more widely concerned, and with the continuous increase of the installed proportion of new energy power generation of a northwest power grid and the continuous operation of a large-capacity direct-current transmission project, the risk of system frequency stability caused by direct-current blocking or power dip is more and more large. However, in the general process of detecting the frequency of the new energy, the frequency condition of the current detection point is only detected simply, and then the current detection point is evaluated, the detection is relatively simple, and the frequency modulation detection based on the change parameters of the new energy station cannot be performed based on a plurality of parameter information, so that the frequency modulation change of the new energy station is judged, and therefore, the invention provides the frequency modulation detection method and the frequency modulation detection system of the new energy station based on multi-point synchronous measurement.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a new energy station frequency modulation detection method and system based on multipoint synchronous measurement.
In order to realize the purpose, the invention is realized by the following technical scheme: a new energy station frequency modulation detection method based on multipoint synchronous measurement comprises the following steps:
step S1: the server acquires a current information numerical value, a voltage information numerical value, a frequency information numerical value and a pulse coefficient in historical measurement information of the new energy station through the database, the server transmits the historical measurement information to the numerical calculation module, and the numerical calculation module calculates according to the received historical measurement information to obtain a historical frequency modulation reference value;
step S2: the server sets a reference interval according to the acquired historical frequency modulation reference value;
and step S3: the server controls the multi-point measurement module to acquire real-time current information, real-time voltage information, real-time frequency information and real-time pulse coefficients in the real-time measurement information of the new energy station, the server transmits the real-time measurement information to the numerical calculation module, and the numerical calculation module calculates according to the received real-time measurement information to obtain a frequency modulation detection reference value;
and step S4: the server receives the frequency modulation detection reference value and judges whether frequency modulation is carried out or not in the range of the reference interval, and the server transmits the judgment information to the frequency modulation reminding module to remind the frequency modulation information of the new energy station.
Further, when the historical frequency modulation reference value is obtained, the specific process is as follows:
acquiring measurement data of historical measurement information in time periods from T1 to Tn, and setting current information values as follows: DLz, the obtained voltage information values are: DYz, the obtained frequency information values are: PLz, the pulse coefficients obtained are: MCz, setting a historical frequency modulation reference value as LSTPz, and solving the historical frequency modulation reference value;
the current information values obtained at the point T1 are set as follows: DLz1, the obtained voltage information values are: DYz1, the obtained frequency information values are: PLz1, the pulse coefficients obtained are: MCz1; the current information values obtained at the Tn time point were set as: DLzn, the obtained voltage information value is: and DYzn, wherein the obtained frequency information value is as follows: PLzn, the obtained pulse coefficients are: MCzn; and obtaining historical frequency modulation reference values from the time point T1 to the time point Tn.
Further, in step S2, when the reference interval is set, the setting process is specifically as follows:
step S21: arranging the acquired multiple frequency modulation reference values in a descending order, wherein when n is an even number, the frequency modulation reference value arranged at n/2 is taken as a standard reference value, and when n is an odd number, the frequency modulation reference value arranged at (n-1)/2 is taken as a standard reference value;
step S22: setting the standard value as BZLSTPz, and setting (0 to (n-3) multiplied by BZLSTPz/n) as a first reference interval;
step S23: setting [ (n-3) xBZLSTPz/n, (n + 3) xBZLSTPz/n ] as a second reference interval;
step S24: the third reference interval ((n + 3). Times.BZLTPz/n, ∞) is set.
Further, in step S4, when the frequency modulation detection reference value is determined:
if the obtained frequency modulation detection reference value is within (0 to (n-3) xBZLSTPz/n), carrying out frequency reduction on the new energy station, and detecting to carry out frequency modulation on the new energy station;
if the calculated frequency modulation detection reference value is within [ (n-3) xBZLSTPz/n, (n + 3) xBZLSTPz/n ], the new energy station is not subjected to frequency modulation and belongs to a normal variation range;
and if the obtained frequency modulation detection reference value is within ((n + 3) multiplied by BZLSTTpz/n and infinity), the frequency of the new energy station is increased, and the frequency modulation of the new energy station is detected.
Further, in step S4, the frequency modulation reminding module includes an information broadcasting unit, an information display unit, and a numerical value storage unit; when the frequency modulation reminding module carries out frequency modulation reminding, the specific steps are as follows:
step S41: the numerical value storage unit stores the frequency modulation detection reference value and the acquired time;
step S42: after the storage is finished, the information broadcasting unit broadcasts the frequency modulation detection reference values in the first reference interval and the third reference interval respectively, if the frequency modulation detection reference values are in the first reference interval, the broadcasting time is set to be 3-5 s, the information is broadcasted through male voice, and if the frequency modulation detection reference values are in the second reference interval, the broadcasting time is set to be 5-8 s, and the information is broadcasted through female voice;
step S43: and when the information is broadcasted, the information display unit displays the currently acquired frequency modulation detection reference value, and the information display unit displays the numerical value information frequency modulation detection reference value ranges in the first reference interval, the second reference interval and the third reference interval in real time.
A new energy station frequency modulation detection system based on multipoint synchronous measurement comprises a database, a multipoint measurement module, a numerical calculation module, a frequency modulation reminding module and a server, wherein the database, the multipoint measurement module, the numerical calculation module and the frequency modulation reminding module are respectively in data connection with the server;
the server acquires historical measurement information of the new energy station through a database; the multi-point measurement module acquires real-time measurement information of the new energy station, the server receives historical measurement information and the real-time measurement information and transmits the historical measurement information and the real-time measurement information to the numerical value calculation module, and the numerical value calculation module calculates according to the received historical measurement information to obtain a historical frequency modulation reference value;
the server sets a reference interval according to the acquired historical frequency modulation reference value, and the numerical calculation module calculates according to the received real-time measurement information to obtain a frequency modulation detection reference value; and the server receives the frequency modulation detection reference value in the range interval of the reference interval and judges whether frequency modulation is carried out or not.
Further, the historical measurement information includes a current information value, a voltage information value, a frequency information value and a pulse coefficient, and when the historical measurement information is acquired, the method specifically includes the following steps:
the method comprises the following steps: acquiring measurement data of historical measurement information in a period of time, and respectively acquiring the measurement data in the time periods from T1 to Tn, wherein n is more than 0;
step two: classifying the acquired historical measurement information according to the sequence of the acquired time points, wherein the information of each time point comprises a current information numerical value, a voltage information numerical value, a frequency information numerical value and a pulse coefficient;
step three: according to the historical measurement information obtained at the time point, the current information value obtained at the T1 point is set as follows: DLz1, the obtained voltage information values are: DYz1, the obtained frequency information values are: PLz1, the pulse coefficients obtained are: MCz1; the values of the current information obtained at the Tn time point were set as: DLzn, the obtained voltage information value is: and DYzn, wherein the obtained frequency information value is as follows: PLzn, the obtained pulse coefficients are: MCzn;
step four: and respectively transmitting the acquired historical measurement information of each time point to a database for data arrangement.
Further, the real-time measurement information comprises real-time current information, real-time voltage information, real-time frequency information and a real-time pulse coefficient; when the real-time measurement information is acquired, the specific process is as follows:
the real-time current information value, the real-time voltage information value, the real-time frequency information value and the real-time pulse coefficient are detected by the multi-point measuring module and defined as detection coefficients, and when at least one detection coefficient is changed, the server controls the multi-point measuring module to transmit the detection coefficient in the change to the numerical calculation module.
Further, when the historical frequency modulation reference value is calculated, the numerical calculation module sequentially obtains the current information numerical value, the voltage information numerical value, the frequency information numerical value and the pulse coefficient at the time point of T1, and the current information numerical value, the voltage information numerical value, the frequency information numerical value and the pulse coefficient at the time point of … … Tn at the time point of T2, and sets the current information numerical values as: DLz, the obtained voltage information values are: DYz, the obtained frequency information values are: PLz, the pulse coefficients obtained are: MCz, and setting the historical frequency modulation reference value as LSTPz.
Further, the obtained frequency modulation detection reference value is compared with the numerical values of the first reference interval, the second reference interval and the third reference interval, and the obtained frequency modulation detection reference value is judged;
when the judgment is carried out, the specific judgment process is as follows:
if the obtained frequency modulation detection reference value is in a first reference interval, carrying out frequency modulation on the new energy station;
if the obtained frequency modulation detection reference value is in a second reference interval, the new energy station is not subjected to frequency modulation and belongs to a normal variation range;
if the obtained frequency modulation detection reference value is in a third reference interval, carrying out frequency modulation on the new energy station;
the server transmits the judgment information to a frequency modulation reminding module to remind the frequency modulation information of the new energy station;
the frequency modulation reminding module comprises an information broadcasting unit, an information display unit and a numerical value storage unit, frequency modulation detection reference values and acquired time are stored through the numerical value storage unit, the frequency modulation detection reference values in a first reference interval and a third reference interval are respectively broadcasted through the information broadcasting unit, if the frequency modulation detection reference values are in the first reference interval, broadcasting is carried out through male voice, if the frequency modulation detection reference values are in the second reference interval, broadcasting is carried out through female voice, and if the frequency modulation detection reference values are in the second reference interval, broadcasting is carried out through male voice; and displaying the currently acquired frequency modulation detection reference value through an information display unit, wherein the information display unit displays numerical value information frequency modulation detection reference value ranges in a first reference interval, a second reference interval and a third reference interval in real time.
The invention has the beneficial effects that:
1. according to the method, historical information parameters of the new energy station are acquired, frequency change information in the new energy station is detected according to the acquired parameter information, frequency modulation detection is carried out on the basis of a plurality of parameter information, and frequency modulation change of the new energy station is judged.
2. The method comprises the steps of acquiring historical measurement information, solving a historical frequency modulation reference value according to the acquired historical measurement information, dividing the historical frequency modulation reference value into a plurality of reference intervals according to the solved historical frequency modulation reference value, solving a frequency modulation detection reference value according to parameter information acquired in real time, and judging whether frequency modulation is performed or not according to the reference intervals.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a method step diagram of a new energy station frequency modulation detection method based on multipoint synchronous measurement according to the present invention;
fig. 2 is a schematic block diagram of a new energy station frequency modulation detection system based on multipoint synchronous measurement.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the present invention, please refer to fig. 1 and fig. 2, a new energy station frequency modulation detection system based on multipoint synchronous measurement includes a database, a multipoint measurement module, a numerical value calculation module, a frequency modulation reminding module and a server, wherein the database, the multipoint measurement module, the numerical value calculation module and the frequency modulation reminding module are respectively in data connection with the server;
acquiring historical measurement information of the new energy station through a database;
the historical measurement information comprises a current information value, a voltage information value, a frequency information value and a pulse coefficient, and when the historical measurement information is acquired, the method specifically comprises the following steps:
the method comprises the following steps: acquiring measurement data of historical measurement information in a period of time, and respectively acquiring the measurement data in the time periods from T1 to Tn, wherein n is more than 0;
step two: classifying the acquired historical measurement information according to the sequence of the acquired time points, wherein the information of each time point comprises a current information numerical value, a voltage information numerical value, a frequency information numerical value and a pulse coefficient;
step three: according to the historical measurement information obtained at the time point, the current information value obtained at the T1 point is set as follows: DLz1, the obtained voltage information values are: DYz1, the obtained frequency information values are: PLz1, the pulse coefficients obtained are: MCz1; the current information values obtained at the Tn time point were set as: DLzn, the obtained voltage information value is: and DYzn, wherein the obtained frequency information value is as follows: PLzn, the obtained pulse coefficients are: MCzn;
step four: and respectively transmitting the acquired historical measurement information of each time point to a database for data arrangement.
It should be noted that: the time period from T1 to Tn includes T1, T2, T3 … … Tn, and the historical measurement information at each time point is constantly changed, T1 to Tn means within a period of time, which may be within 0 to 1h or 0 to 3h, and thus, the current information value obtained at the time point T2 is: DLz2, the obtained voltage information values are: DYz2, the obtained frequency information values are: PLz2, the pulse coefficients obtained are: MCz2; the current information values obtained at the time point T3 are: DLz3, the obtained voltage information values are: DYz3, the obtained frequency information values are: PLz3, the obtained pulse coefficients are: MCz3, and accordingly, the current information value, the voltage information value, the frequency information value and the pulse coefficient at the rest time point are respectively set and marked.
The multi-point measurement module acquires real-time measurement information of the new energy station;
the real-time measurement information comprises real-time current information, real-time voltage information, real-time frequency information and a real-time pulse coefficient; it should be noted that: when the real-time measurement information is acquired, the specific process is as follows:
the real-time current information value, the real-time voltage information value, the real-time frequency information value and the real-time pulse coefficient are detected by the multi-point measuring module and defined as detection coefficients, and when at least one detection coefficient is changed, the server controls the multi-point measuring module to transmit the detection coefficient in the change to the numerical calculation module.
The server receives the historical measurement information and the real-time measurement information, and transmits the historical measurement information and the real-time measurement information to the numerical calculation module, and the numerical calculation module calculates according to the received historical measurement information to obtain a historical frequency modulation reference value;
when the historical frequency modulation reference value is calculated, the numerical value calculation module sequentially acquires a current information numerical value, a voltage information numerical value, a frequency information numerical value and a pulse coefficient at a T1 time point, and a current information numerical value, a voltage information numerical value, a frequency information numerical value and a pulse coefficient … … Tn time point, and sets the current information numerical values as follows: DLz, the obtained voltage information values are: DYz, the obtained frequency information values are: PLz, the pulse coefficients obtained are: MCz, setting the historical fm reference value as LSTPz, specifically referring to the following formula:
wherein K is a constant and K > 0.
Obtaining the historical frequency modulation reference value at the point T1 as LSTPz1 according to the reference formula of the historical frequency modulation reference value, and obtaining the frequency modulation reference value at the point T1 as LSTPz1
Obtaining the historical frequency modulation reference value at the point T2 as LSTPz2 according to the reference formula of the historical frequency modulation reference value, and obtaining the frequency modulation reference value at the point T2 as LSTPz2
Obtaining the historical FM reference value at the T3 point as LSTPz3 by referring to the formula of the historical FM reference value, then
According to the formula, the historical frequency modulation reference value at Tn point is LSTPzn
Accordingly, a plurality of historical FM reference values LSTPz1, LSTPz2 and LSTPz3 … … LSTPzn are obtained, the obtained plurality of FM reference values are arranged in the order from small to large, when n is an even number, the FM reference value arranged at n/2 is a standard reference value, when n is an odd number, the FM reference value arranged at (n-1)/2 is a standard reference value, the standard value is BZLSTPz, and (0 to (n-3) BZLSTPz/n) is set as a first reference interval, [ (n-3) BZLSTPz/n, (n + 3) BZLTPz/n ] is a second reference interval, and ((n + 3) BZLSTPz/n, ∞) is a third reference interval.
It should be noted that: BZLSTPz is one of LSTPz1, LSTPz2, LSTPz3 … … LSTPzn historical FM reference values.
The server sets a reference interval according to the acquired historical frequency modulation reference value, and the numerical value calculation module calculates according to the received real-time measurement information to obtain a frequency modulation detection reference value;
when the numerical value calculation module calculates the reference value of the frequency modulation detection system, the frequency modulation detection reference value is set as follows: TPJCz, real-time current information values are as follows: SSDLz, real-time voltage information values are: SSDYz, real-time frequency information values are: the SSPLz real-time pulse coefficients are: SSMCz;
when calculating the reference value of frequency modulation detection, please refer to the following formula:
it is noted that K1 is a constant, and K1 > 0;
and the numerical value calculation module substitutes the received real-time current information numerical value, the real-time voltage information numerical value, the real-time frequency information numerical value and the real-time pulse coefficient into the formula to obtain a frequency modulation detection reference value, compares the obtained frequency modulation detection reference value with numerical values of a first reference interval, a second reference interval and a third reference interval, and judges the obtained frequency modulation detection reference value.
The server receives the frequency modulation detection reference value in a reference interval range interval and judges whether frequency modulation is carried out or not;
it should be noted that: when the judgment is carried out, the specific judgment process is as follows:
if the obtained frequency modulation detection reference value is in a first reference interval, carrying out frequency modulation on the new energy station;
if the obtained frequency modulation detection reference value is in a second reference interval, the new energy station is not subjected to frequency modulation and belongs to a normal variation range;
and if the obtained frequency modulation detection reference value is in a third reference interval, carrying out frequency modulation on the new energy station.
The server transmits the judgment information to a frequency modulation reminding module to remind the frequency modulation information of the new energy station;
the frequency modulation reminding module comprises an information broadcasting unit, an information display unit and a numerical value storage unit, frequency modulation detection reference values and acquired time are stored through the numerical value storage unit, the frequency modulation detection reference values in a first reference interval and a third reference interval are respectively broadcasted through the information broadcasting unit, if the frequency modulation detection reference values are in the first reference interval, broadcasting is carried out through male voice, if the frequency modulation detection reference values are in the second reference interval, broadcasting is carried out through female voice, and if the frequency modulation detection reference values are in the second reference interval, broadcasting is carried out through male voice; and displaying the currently acquired frequency modulation detection reference value through an information display unit, wherein the information display unit displays numerical value information frequency modulation detection reference value ranges in a first reference interval, a second reference interval and a third reference interval in real time.
And after the value storage unit continuously stores for 1 week, the stored information is transmitted to the database, and the stored content is cleaned.
The invention discloses a new energy station frequency modulation detection method based on multipoint synchronous measurement, which comprises the following steps:
step S1: the server acquires a current information numerical value, a voltage information numerical value, a frequency information numerical value and a pulse coefficient in historical measurement information of the new energy station through the database, the server transmits the historical measurement information to the numerical calculation module, and the numerical calculation module calculates according to the received historical measurement information to obtain a historical frequency modulation reference value;
when the historical frequency modulation reference value is obtained, the specific process is as follows:
acquiring measurement data of historical measurement information in time periods from T1 to Tn, and setting current information values as follows: DLz, the obtained voltage information values are: DYz, the obtained frequency information values are: PLz, the pulse coefficients obtained are: MCz, setting the historical fm reference value as LSTPz, specifically referring to the following formula:
the current information values obtained at the point T1 are set as follows: DLz1, the obtained voltage information values are: DYz1, the obtained frequency information values are: PLz1, the pulse coefficients obtained are: MCz1; the values of the current information obtained at the Tn time point were set as: DLzn, the obtained voltage information value is: and DYzn, wherein the obtained frequency information value is as follows: PLzn, the obtained pulse coefficients are: MCzn; calculating a historical frequency modulation reference value from the time point T1 to the time point Tn by using a formula in the step S11;
step S2: the server sets a reference interval according to the acquired historical frequency modulation reference value;
setting a reference interval according to the plurality of historical frequency modulation reference values obtained in the step S1, wherein the setting process specifically comprises the following steps:
step S21: arranging the acquired multiple frequency modulation reference values in a descending order, wherein when n is an even number, the frequency modulation reference value arranged at n/2 is taken as a standard reference value, and when n is an odd number, the frequency modulation reference value arranged at (n-1)/2 is taken as a standard reference value;
step S22: setting the standard value as BZLSTPz, and setting (0 to (n-3) multiplied by BZLSTPz/n) as a first reference interval;
step S23: setting [ (n-3) xBZLSTPz/n, (n + 3) xBZLSTPz/n ] as a second reference interval;
step S24: the third reference interval ((n + 3). Times.BZLTPz/n, ∞) is set.
And step S3: the server controls the multi-point measurement module to acquire real-time current information, real-time voltage information, real-time frequency information and real-time pulse coefficients in the real-time measurement information of the new energy station, the server transmits the real-time measurement information to the numerical calculation module, and the numerical calculation module calculates according to the received real-time measurement information to obtain a frequency modulation detection reference value;
the calculation process of the frequency modulation detection system reference value by the numerical value calculation module is as follows:
setting the frequency modulation detection reference value as follows: TPJCz, real-time current information values are as follows: SSDLz, real-time voltage information values are: SSDYz, real-time frequency information values are: the SSPLz real-time pulse coefficients are: SSMCz;
when calculating the reference value of frequency modulation detection, please refer to the following formula:
comparing the obtained frequency modulation detection reference value with the numerical values of the first reference interval, the second reference interval and the third reference interval, and judging the obtained frequency modulation detection reference value;
and step S4: the server receives the frequency modulation detection reference value and judges whether frequency modulation is carried out or not in the range of the reference interval, and the server transmits the judgment information to the frequency modulation reminding module to remind the frequency modulation information of the new energy station.
When the frequency modulation detection reference value is judged:
if the obtained frequency modulation detection reference value is within (0 to (n-3) xBZLSTPz/n), carrying out frequency reduction on the new energy station, and detecting to carry out frequency modulation on the new energy station;
if the calculated frequency modulation detection reference value is within [ (n-3) xBZLSTPz/n, (n + 3) xBZLSTPz/n ], the new energy station is not subjected to frequency modulation and belongs to a normal variation range;
and if the obtained frequency modulation detection reference value is within ((n + 3) multiplied by BZLSTTpz/n and infinity), the frequency of the new energy station is increased, and the frequency modulation of the new energy station is detected.
The frequency modulation reminding module comprises an information broadcasting unit, an information display unit and a numerical value storage unit; when the frequency modulation reminding module carries out frequency modulation reminding, the specific steps are as follows:
step S41: the numerical value storage unit stores the frequency modulation detection reference value and the acquired time;
step S42: after the information broadcasting unit finishes storing, broadcasting the frequency modulation detection reference values in the first reference interval and the third reference interval respectively, setting broadcasting time to be 4s in the first reference interval, and broadcasting through male voice, and setting broadcasting time to be 6s in the second reference interval, and broadcasting through female voice;
step S43: and when the information is broadcasted, the information display unit displays the currently acquired frequency modulation detection reference value, and the information display unit displays the numerical value information frequency modulation detection reference value ranges in the first reference interval, the second reference interval and the third reference interval in real time.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A new energy station frequency modulation detection method based on multipoint synchronous measurement is characterized by comprising the following steps:
step S1: the server acquires a current information numerical value, a voltage information numerical value, a frequency information numerical value and a pulse coefficient in historical measurement information of the new energy station through the database, the server transmits the historical measurement information to the numerical calculation module, and the numerical calculation module calculates according to the received historical measurement information to obtain a historical frequency modulation reference value;
step S2: the server sets a reference interval according to the acquired historical frequency modulation reference value;
and step S3: the server controls the multi-point measurement module to acquire real-time current information, real-time voltage information, real-time frequency information and real-time pulse coefficients in the real-time measurement information of the new energy station, the server transmits the real-time measurement information to the numerical calculation module, and the numerical calculation module calculates according to the received real-time measurement information to obtain a frequency modulation detection reference value;
and step S4: the server receives the frequency modulation detection reference value and judges whether frequency modulation is carried out or not in the range of the reference interval, and the server transmits the judgment information to the frequency modulation reminding module to remind the frequency modulation information of the new energy station.
2. The method for detecting the frequency modulation of the new energy station based on the multipoint synchronous measurement as claimed in claim 1, wherein when the historical frequency modulation reference value is obtained, the specific process is as follows:
acquiring measurement data of historical measurement information in time periods from T1 to Tn, and setting current information values as follows: DLz, the obtained voltage information values are: DYz, the obtained frequency information values are: PLz, the pulse coefficients obtained are: MCz, setting a historical frequency modulation reference value as LSTPz, and solving the historical frequency modulation reference value;
the current information values obtained at the point T1 are set as follows: DLz1, the obtained voltage information values are: DYz1, the obtained frequency information values are: PLz1, the obtained pulse coefficients are: MCz1; the current information values obtained at the Tn time point were set as: DLzn, the obtained voltage information value is: and DYzn, wherein the obtained frequency information value is as follows: PLzn, the obtained pulse coefficients are: MCzn; and obtaining historical frequency modulation reference values from the time point T1 to the time point Tn.
3. The method according to claim 1, wherein in step S2, when the reference interval is set, the setting process specifically includes:
step S21: arranging the acquired multiple frequency modulation reference values in a descending order, wherein when n is an even number, the frequency modulation reference value arranged at n/2 is taken as a standard reference value, and when n is an odd number, the frequency modulation reference value arranged at (n-1)/2 is taken as a standard reference value;
step S22: setting the standard value as BZLSTPz, and setting (0 to (n-3) multiplied by BZLSTPz/n) as a first reference interval;
step S23: setting [ (n-3) xBZLSTPz/n, (n + 3) xBZLSTPz/n ] as a second reference interval;
step S24: the third reference interval ((n + 3). Times.BZLTPz/n, ∞) is set.
4. The method for detecting frequency modulation of a new energy station based on multi-point synchronous measurement as claimed in claim 1, wherein in step S4, when the reference value for frequency modulation detection is determined:
if the obtained frequency modulation detection reference value is within (0 to (n-3) xBZLSTPz/n), carrying out frequency reduction on the new energy station, and detecting to carry out frequency modulation on the new energy station;
if the calculated frequency modulation detection reference value is within [ (n-3) xBZLSTPz/n, (n + 3) xBZLSTPz/n ], the new energy station is not subjected to frequency modulation and belongs to a normal variation range;
and if the obtained frequency modulation detection reference value is within ((n + 3) multiplied by BZLSTTpz/n and infinity), the frequency of the new energy station is increased, and the frequency modulation of the new energy station is detected.
5. The new energy station frequency modulation detection method based on multipoint synchronous measurement according to claim 1, wherein in step S4, the frequency modulation reminding module comprises an information broadcasting unit, an information display unit and a numerical value storage unit; when the frequency modulation reminding module carries out frequency modulation reminding, the specific steps are as follows:
step S41: the numerical value storage unit stores the frequency modulation detection reference value and the acquired time;
step S42: after the storage is finished, the information broadcasting unit broadcasts the frequency modulation detection reference values in the first reference interval and the third reference interval respectively, if the frequency modulation detection reference values are in the first reference interval, the broadcasting time is set to be 3-5 s, the information is broadcasted through male voice, and if the frequency modulation detection reference values are in the second reference interval, the broadcasting time is set to be 5-8 s, and the information is broadcasted through female voice;
step S43: and when the information is broadcasted, the information display unit displays the currently acquired frequency modulation detection reference value, and the information display unit displays the numerical value information frequency modulation detection reference value ranges in the first reference interval, the second reference interval and the third reference interval in real time.
6. A new energy station frequency modulation detection system based on multipoint synchronous measurement is suitable for the new energy station frequency modulation detection method based on multipoint synchronous measurement according to any one of claims 1 to 5, and is characterized in that the detection system comprises a database, a multipoint measurement module, a numerical value calculation module, a frequency modulation reminding module and a server, wherein the database, the multipoint measurement module, the numerical value calculation module and the frequency modulation reminding module are respectively in data connection with the server;
the server acquires historical measurement information of the new energy station through a database; the multi-point measurement module acquires real-time measurement information of the new energy station, the server receives historical measurement information and the real-time measurement information and transmits the historical measurement information and the real-time measurement information to the numerical calculation module, and the numerical calculation module calculates a historical frequency modulation reference value according to the received historical measurement information;
the server sets a reference interval according to the acquired historical frequency modulation reference value, and the numerical calculation module calculates according to the received real-time measurement information to obtain a frequency modulation detection reference value; and the server receives the frequency modulation detection reference value in the range interval of the reference interval and judges whether frequency modulation is carried out or not.
7. The system for detecting the frequency modulation of the new energy station based on the multipoint synchronous measurement as claimed in claim 6, wherein the historical measurement information includes a current information value, a voltage information value, a frequency information value and a pulse coefficient, and when the historical measurement information is obtained, the method specifically includes the following steps:
the method comprises the following steps: acquiring measurement data of historical measurement information in a period of time, and respectively acquiring the measurement data in the time periods from T1 to Tn, wherein n is more than 0;
step two: classifying the acquired historical measurement information according to the sequence of the acquired time points, wherein the information of each time point comprises a current information numerical value, a voltage information numerical value, a frequency information numerical value and a pulse coefficient;
step three: according to the historical measurement information obtained at the time point, the current information value obtained at the T1 point is set as follows: DLz1, the obtained voltage information values are: DYz1, the obtained frequency information values are: PLz1, the pulse coefficients obtained are: MCz1; the current information values obtained at the Tn time point were set as: DLzn, the obtained voltage information value is: and DYzn, wherein the obtained frequency information value is as follows: PLzn, the obtained pulse coefficients are: MCzn;
step four: and respectively transmitting the acquired historical measurement information of each time point to a database for data arrangement.
8. The system for detecting the frequency modulation of the new energy station based on the multipoint synchronous measurement as claimed in claim 6, wherein the real-time measurement information comprises real-time current information, real-time voltage information, real-time frequency information and real-time pulse coefficients; when the real-time measurement information is acquired, the specific process is as follows: the real-time current information value, the real-time voltage information value, the real-time frequency information value and the real-time pulse coefficient are detected by the multi-point measuring module and defined as detection coefficients, and when at least one detection coefficient is changed, the server controls the multi-point measuring module to transmit the detection coefficient in the change to the numerical calculation module.
9. The system as claimed in claim 6, wherein when calculating the historical FM reference value, the value calculating module sequentially obtains the current information value, the voltage information value, the frequency information value and the pulse coefficient at the time point T1, and the current information value, the voltage information value, the frequency information value and the pulse coefficient at the time point T2, and the current information value, the voltage information value, the frequency information value and the pulse coefficient at the time point … … Tn, and sets the current information values as: DLz, the obtained voltage information values are: DYz, the obtained frequency information values are: PLz, the pulse coefficients obtained are: MCz, and setting the historical frequency modulation reference value as LSTPz.
10. The system for detecting the frequency modulation of the new energy station based on the multipoint synchronous measurement as claimed in claim 6, wherein the determined frequency modulation detection reference value is judged according to the comparison of the determined frequency modulation detection reference value with the numerical values of the first reference interval, the second reference interval and the third reference interval;
when the judgment is carried out, the specific judgment process is as follows:
if the obtained frequency modulation detection reference value is in a first reference interval, carrying out frequency down adjustment on the new energy station;
if the obtained frequency modulation detection reference value is in a second reference interval, the new energy station is not subjected to frequency modulation and belongs to a normal variation range;
if the obtained frequency modulation detection reference value is in a third reference interval, carrying out frequency modulation on the new energy station;
the server transmits the judgment information to a frequency modulation reminding module to remind the frequency modulation information of the new energy station;
the frequency modulation reminding module comprises an information broadcasting unit, an information display unit and a numerical value storage unit, frequency modulation detection reference values and acquired time are stored through the numerical value storage unit, the frequency modulation detection reference values in a first reference interval and a third reference interval are respectively broadcasted through the information broadcasting unit, if the frequency modulation detection reference values are in the first reference interval, broadcasting is carried out through male voice, if the frequency modulation detection reference values are in the second reference interval, broadcasting is carried out through female voice, and if the frequency modulation detection reference values are in the second reference interval, broadcasting is carried out through male voice; and displaying the currently acquired frequency modulation detection reference value through an information display unit, wherein the information display unit displays numerical value information frequency modulation detection reference value ranges in a first reference interval, a second reference interval and a third reference interval in real time.
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