CN112147447B - Wave recording triggering method and system of relay protection device based on input amount - Google Patents
Wave recording triggering method and system of relay protection device based on input amount Download PDFInfo
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Abstract
The invention discloses a method and a system for triggering wave recording of a relay protection device of an input quantity, wherein the method comprises the following steps of S1: setting a test input quantity channel number, test input quantity advance time and test input quantity width in a relay protection device; s2: setting an input quantity setting time and an input quantity resetting time, and initializing the input quantity setting time and the input quantity resetting time; s3: setting a sampling period; s4: detecting the input amount, and updating the input amount setting time and the input amount resetting time according to the input amount; s5: calculating the input amount time according to the updated input amount setting time and the updated input amount resetting time; s6: and if the input amount time is less than or equal to the judgment threshold, triggering wave recording by the relay protection device. The invention can trigger wave recording when no protection is started, and is convenient for analyzing whether the action behavior of the device is correct under any test condition through the wave recording data.
Description
Technical Field
The invention relates to the technical field of relay protection, in particular to a recording triggering method and system used in a relay protection device test based on an input amount.
Background
For a regional power grid enterprise, a large number of substations are generally managed, and a large number of suppliers of products run in the substations. There is a certain difference in the external characteristics of these products, sometimes very much. These differences bring certain inconveniences to the operation and maintenance of the substation.
In order to reduce the problem of inconvenient operation and maintenance caused by the difference of products of suppliers, power grid enterprises make the requirements of standardized design on products supplied into transformer substations. The microcomputer relay protection device is one of main products which require standardized design in power grid enterprises.
The standardized design specifies the external characteristics of microcomputer relay protection devices supplied by microcomputer relay protection manufacturers, such as analog quantity, input and output quantity, protection logic and the like. The external characteristics of microcomputer relay protection devices of various suppliers are required to be consistent.
After each supplier designs the microcomputer relay protection device according to the requirements of standardized design. In order to check whether the external characteristics of the microcomputer relay protection devices of all suppliers are consistent and whether the performance meets the requirements, the power grid enterprise carries out centralized test on the relay protection devices provided by all suppliers.
One of the most important test contents in the centralized test is a dynamic simulation experiment, which verifies whether the action behavior of the relay protection device is correct by simulating various faults. And whether the action behavior of the protection is correct or not is analyzed through the recording of the device.
In the design of the existing relay protection device, the wave recording of the device is generally triggered by protection starting. The device triggers the device to record waves when the protection is started.
The invention discloses an intelligent relay protection fault recording method with publication number CN108445321A of No. 03 month 19 in 2018.A data compression module is adopted, and a front-and-back waveform differential compression algorithm based on waveform periodicity characteristics is adopted, so that the intelligent relay protection fault recording method has the characteristics of low power consumption, small calculated amount and high compression ratio, has a good waveform data compression effect, and greatly reduces the manufacturing cost of a relay protection fault recording and playback system; according to the fault wave recording method and device, on the basis of fault wave recording data, modeling is carried out on primary equipment of a power system, a primary equipment model is associated with a wave recording channel in a fault wave recording data file to obtain a wave recording analysis model, and when a fault occurs, wave alignment of multi-wave recording data can be carried out according to sudden change characteristics of voltage and current.
During dynamic simulation test, under the same test, the behavior of the relay protection devices of different suppliers is often inconsistent. Under certain tests, there were cases where some suppliers' relaying protection devices were protection-enabled while others did not. Under the condition, each relay protection device supplier needs to analyze the action behavior of relay protection, a relay protection device with protection starting can be analyzed through wave recording triggered by protection starting, and a relay protection device without protection starting cannot be analyzed through wave recording data because wave recording is not triggered.
Disclosure of Invention
The invention aims to provide a wave recording triggering method used in a relay protection device test based on the input quantity, which can trigger wave recording when no protection is started.
The invention further aims to provide a recording triggering system used in the relay protection device test based on the input amount.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a wave recording triggering method used in a relay protection device test based on the input quantity comprises the following steps:
s1: setting a test input quantity channel number, test input quantity advance time and test input quantity width in a relay protection device;
s2: setting an input quantity setting time and an input quantity resetting time, and initializing the input quantity setting time and the input quantity resetting time;
s3: setting a sampling period;
s4: detecting the input amount, and updating the input amount setting time and the input amount resetting time according to the input amount;
s5: calculating the input amount time according to the updated input amount setting time and the updated input amount resetting time;
s6: and if the input amount time is less than or equal to the judgment threshold, triggering wave recording by the relay protection device.
Preferably, in step S1, the trial input channel number nC, the trial input amount advance time tP, and the trial input amount width tW are all constant values.
Preferably, in step S2, the initialization opening amount set time t1 and the opening amount reset time t2 are 0.
Preferably, in step S4, the updating the entry amount set time and the entry amount reset time according to the entry amount includes:
when detecting that the input amount at the current time point is 1 and the input amount at the last time point is 0, updating t1 to be the current time;
when it is detected that the current time point entry amount is 0 and the previous time point entry amount is 1, t2 is updated to the current time.
Preferably, the calculation of the intake time in step S5 is specifically:
calculating a difference t3 between the opening amount set time t1 and the opening amount reset time t 2:
t3＝t2-t1
calculating the absolute value t4 of the difference between t3 and the trial input width tW:
t4＝|t3-tW|
judging the size of t4, if t4 is smaller than the preset time, setting the input quantity setting time t1 and the input quantity resetting time t2 to be 0, and setting the current time to be t 5; if t4 is not less than the preset time, setting t5 to 0;
setting the current time as t6, calculating the absolute value t7 of t6-t 5:
T7＝|t6-t5|
calculating the absolute value t8 of tP-tW:
T8＝|tP-tW|
calculating the absolute value t9 of t7-t 8:
T9＝|t7-t8|
in the formula, t9 is the input amount time.
Preferably, the preset time is 3 ms.
Preferably, the determination threshold is 0.5 × tT, where tT is a sampling period.
When a dynamic simulation test is performed, the input value of the device channel number nC is set for tP time before loading the input value to be tested, and the set time is tW.
A recording triggering system used in a relay protection device test based on the input quantity comprises:
the relay protection device comprises a setting module, a control module and a control module, wherein the setting module is used for setting a test input channel number, test input advance time, test input width, input setting time, input resetting time and a sampling period in the relay protection device;
the initialization module initializes the input quantity setting time and the input quantity resetting time;
the updating module updates the input quantity setting time and the input quantity resetting time according to the input quantity;
the calculation module calculates the input amount time according to the updated input amount setting time and the updated input amount resetting time;
and the judging module is used for triggering the relay protection device to record waves when the input quantity time is less than or equal to a judging threshold value.
Preferably, the update module updates the entry amount set time t1 and the entry amount reset time t2 according to the entry amount, specifically:
when detecting that the input amount at the current time point is 1 and the input amount at the last time point is 0, updating t1 to be the current time;
when it is detected that the current time point entry amount is 0 and the previous time point entry amount is 1, t2 is updated to the current time.
Preferably, the calculating module calculates the open amount time according to the updated open amount set time and open amount reset time, specifically:
calculating a difference t3 between the opening amount set time t1 and the opening amount reset time t 2:
t3＝t2-t1
calculating the absolute value t4 of the difference between t3 and the trial input width tW:
t4＝|t3-tW|
judging the size of t4, if t4 is smaller than the preset time, setting the input quantity setting time t1 and the input quantity resetting time t2 to be 0, and setting the current time to be t 5; if t4 is not less than the preset time, setting t5 to 0;
setting the current time as t6, calculating the absolute value t7 of t6-t 5:
T7＝|t6-t5|
calculating the absolute value t8 of tP-tW:
T8＝|tP-tW|
calculating the absolute value t9 of t7-t 8:
T9＝|t7-t8|
in the formula, t9 is the input amount time.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
by the method, when a dynamic simulation test is carried out on the relay protection device, the device is triggered to record waves at the time of tP-tW after the difference between the width of the input quantity set position and tW is detected to be not more than 3ms, so that the device can trigger wave recording at the beginning of the test no matter what test is carried out. The problem of do not have among the prior art under the circumstances that the protection starts, the device can't trigger the record ripples to there is not record ripples data can analysis protection action is solved.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention.
Fig. 2 is a schematic diagram illustrating a process of whether to trigger wave recording in the method of the present invention.
Fig. 3 is a schematic diagram of the system structure of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
The implementation provides a wave recording triggering method used in a relay protection device test based on the input amount, as shown in fig. 1, comprising the following steps:
s1: setting a test input quantity channel number, test input quantity advance time and test input quantity width in a relay protection device;
s2: setting an input quantity setting time and an input quantity resetting time, and initializing the input quantity setting time and the input quantity resetting time;
s3: setting a sampling period;
s4: detecting the input amount, and updating the input amount setting time and the input amount resetting time according to the input amount;
s5: calculating the input amount time according to the updated input amount setting time and the updated input amount resetting time;
s6: and if the input amount time is less than or equal to the judgment threshold, triggering wave recording by the relay protection device.
In step S1, the trial entry amount channel number nC, the trial entry amount advance time tP, and the trial entry amount width tW are fixed values.
In step S2, the initialization open amount set time t1 and the open amount reset time t2 are 0.
As shown in fig. 2, in step S4, the updating of the entry amount set time and the entry amount reset time according to the entry amount includes:
when detecting that the input amount at the current time point is 1 and the input amount at the last time point is 0, updating t1 to be the current time;
when it is detected that the current time point entry amount is 0 and the previous time point entry amount is 1, t2 is updated to the current time.
In step S5, the calculation of the intake time specifically includes:
calculating a difference t3 between the opening amount set time t1 and the opening amount reset time t 2:
t3＝t2-t1
calculating the absolute value t4 of the difference between t3 and the trial input width tW:
t4＝|t3-tW|
judging the size of t4, if t4 is smaller than the preset time, setting the input quantity setting time t1 and the input quantity resetting time t2 to be 0, and setting the current time to be t 5; if t4 is not less than the preset time, setting t5 to 0;
setting the current time as t6, calculating the absolute value t7 of t6-t 5:
T7＝|t6-t5|
calculating the absolute value t8 of tP-tW:
T8＝|tP-tW|
calculating the absolute value t9 of t7-t 8:
T9＝|t7-t8|
in the formula, t9 is the input amount time.
The preset time is 3 ms.
The judgment threshold is 0.5 × tT, wherein tT is a sampling period.
Example 2
The embodiment provides a wave recording trigger system used in a relay protection device test based on an input amount, as shown in fig. 3, including:
the relay protection device comprises a setting module, a control module and a control module, wherein the setting module is used for setting a test input channel number, test input advance time, test input width, input setting time, input resetting time and a sampling period in the relay protection device;
the initialization module initializes the input quantity setting time and the input quantity resetting time;
the updating module updates the input quantity setting time and the input quantity resetting time according to the input quantity;
the calculation module calculates the input amount time according to the updated input amount setting time and the updated input amount resetting time;
and the judging module is used for triggering the relay protection device to record waves when the input quantity time is less than or equal to a judging threshold value.
The updating module updates the access amount setting time t1 and the access amount resetting time t2 according to the access amount, and specifically comprises the following steps:
when detecting that the input amount at the current time point is 1 and the input amount at the last time point is 0, updating t1 to be the current time;
when it is detected that the current time point entry amount is 0 and the previous time point entry amount is 1, t2 is updated to the current time.
The calculation module calculates the input amount time according to the updated input amount setting time and the updated input amount resetting time, and specifically comprises the following steps:
calculating a difference t3 between the opening amount set time t1 and the opening amount reset time t 2:
t3＝t2-t1
calculating the absolute value t4 of the difference between t3 and the trial input width tW:
t4＝|t3-tW|
judging the size of t4, if t4 is smaller than the preset time, setting the input quantity setting time t1 and the input quantity resetting time t2 to be 0, and setting the current time to be t 5; if t4 is not less than the preset time, setting t5 to 0;
setting the current time as t6, calculating the absolute value t7 of t6-t 5:
T7＝|t6-t5|
calculating the absolute value t8 of tP-tW:
T8＝|tP-tW|
calculating the absolute value t9 of t7-t 8:
T9＝|t7-t8|
in the formula, t9 is the input amount time.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (4)
1. A wave recording triggering method used in a relay protection device test based on the input amount is characterized by comprising the following steps:
s1: setting a test input quantity channel number, test input quantity advance time and test input quantity width in a relay protection device;
s2: setting an input quantity setting time and an input quantity resetting time, and initializing the input quantity setting time and the input quantity resetting time;
s3: setting a sampling period;
s4: detecting the input amount, and updating the input amount setting time and the input amount resetting time according to the input amount;
s5: calculating the input amount time according to the updated input amount setting time and the updated input amount resetting time;
s6: if the input amount time is less than or equal to the judgment threshold, triggering wave recording by the relay protection device;
in step S1, the trial input channel number nC, the trial input advance time tP, and the trial input width tW are fixed values;
in step S2, the initialization open amount set time t1 and the open amount reset time t2 are 0;
in step S4, the method updates the entry amount set time and the entry amount reset time according to the entry amount, specifically:
when detecting that the input amount at the current time point is 1 and the input amount at the last time point is 0, updating t1 to be the current time;
when detecting that the input amount at the current time point is 0 and the input amount at the last time point is 1, updating t2 to be the current time;
in step S5, the calculation of the intake time specifically includes:
calculating a difference t3 between the opening amount set time t1 and the opening amount reset time t 2:
t3＝t2-t1
calculating the absolute value t4 of the difference between t3 and the trial input width tW:
t4＝|t3-tW|
judging the size of t4, if t4 is smaller than the preset time, setting the input quantity setting time t1 and the input quantity resetting time t2 to be 0, and setting the current time to be t 5; if t4 is not less than the preset time, setting t5 to 0;
setting the current time as t6, calculating the absolute value t7 of t6-t 5:
t7 ＝|t6-t5|
calculating the absolute value t8 of tP-tW:
t8 ＝|tP-tW|
calculating the absolute value t9 of t7-t 8:
t9 ＝|t7-t8|
in the formula, t9 is the input amount time.
2. The wave recording triggering method used in the relay protection device test based on the input amount according to claim 1, wherein the preset time is 3 ms.
3. The method for triggering wave recording used in the relay protection device test based on the input amount according to claim 1, wherein the judgment threshold is 0.5 × tT, where tT is a sampling period.
4. A recording triggering system used in a relay protection device test based on an input amount is characterized by comprising:
the relay protection device comprises a setting module, a control module and a control module, wherein the setting module is used for setting a test input channel number, test input advance time, test input width, input setting time, input resetting time and a sampling period in the relay protection device;
the initialization module initializes the input quantity setting time and the input quantity resetting time;
the updating module updates the input quantity setting time and the input quantity resetting time according to the input quantity;
the calculation module calculates the input amount time according to the updated input amount setting time and the updated input amount resetting time;
the judging module is used for triggering the relay protection device to record waves when the input amount time is less than or equal to a judging threshold value;
the updating module updates the access amount setting time t1 and the access amount resetting time t2 according to the access amount, and specifically comprises the following steps:
when detecting that the input amount at the current time point is 1 and the input amount at the last time point is 0, updating t1 to be the current time;
when detecting that the input amount at the current time point is 0 and the input amount at the last time point is 1, updating t2 to be the current time;
the calculation module calculates the input amount time according to the updated input amount setting time and the updated input amount resetting time, and specifically comprises the following steps:
calculating a difference t3 between the opening amount set time t1 and the opening amount reset time t 2:
t3＝t2-t1
calculating the absolute value t4 of the difference between t3 and the trial input width tW:
t4＝|t3-tW|
judging the size of t4, if t4 is smaller than the preset time, setting the input quantity setting time t1 and the input quantity resetting time t2 to be 0, and setting the current time to be t 5; if t4 is not less than the preset time, setting t5 to 0;
setting the current time as t6, calculating the absolute value t7 of t6-t 5:
t7 ＝|t6-t5|
calculating the absolute value t8 of tP-tW:
t8 ＝|tP-tW|
calculating the absolute value t9 of t7-t 8:
t9 ＝|t7-t8|
in the formula, t9 is the input amount time.
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