CN114142439B - Power restoration method based on station bus voltage loss - Google Patents
Power restoration method based on station bus voltage loss Download PDFInfo
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- CN114142439B CN114142439B CN202111366608.2A CN202111366608A CN114142439B CN 114142439 B CN114142439 B CN 114142439B CN 202111366608 A CN202111366608 A CN 202111366608A CN 114142439 B CN114142439 B CN 114142439B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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Abstract
The application discloses a station bus voltage loss based power restoration method, which comprises the steps of reading telemetering communication data for normalization data processing; judging the charging state, the locking state and the triggering state of the duplicate cell according to the processing result; constructing an automatic generation model of the duplicate strategy, and combining the judgment basis to automatically generate the duplicate strategy; executing the generated duplicate supply strategy to finish duplicate supply; according to the application, the complex electricity strategy is automatically produced through the model, so that the working efficiency is greatly improved; and the accuracy of the duplicate calculation is improved by judging the state of the duplicate unit.
Description
Technical Field
The application relates to the technical field of station duplicate electricity, in particular to a duplicate electricity method based on station bus voltage loss.
Background
The bus voltage loss refers to that the bus voltage is zero in a power system due to faults, the bus voltage loss is a major power production accident, a series of results can be caused, the bus voltage loss is the most serious accident in the system, and the voltage is recovered by rapidly processing as much as possible.
When the bus voltage disappears, the operator on duty should judge the fault property of the bus voltage loss according to the action conditions of the instrument indication, the signal falling, the relay protection and the automatic device and the external symbols during the voltage loss. If the bus voltage disappears due to the failure of the circuit breaker, the fault circuit should be manually cut off, and then the power transmission of other circuits is restored. If the bus is short-circuited or the lead between the bus and the circuit breaker is short-circuited, the external sign of the bus is that the meter has a short-circuit phenomenon (the meter swings violently, the bus voltmeter is zero, and the light character is bright) except for the distribution panel meter. The fault place also has the phenomena of explosion sound, smoke or fire, etc., and can trip the circuit breaker and the line breaker of the main transformer connected to the fault bus, flash light, loudspeaker sound, etc., and the fault bus should be cut off at the moment, and the standby bus is put into.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
The present application has been made in view of the above-described problems occurring in the prior art.
In order to solve the technical problems, the application provides the following technical scheme: the method comprises the steps of reading telemetry communication data for normalization data processing; judging the charging state, the locking state and the triggering state of the duplicate cell according to the processing result; constructing an automatic generation model of the duplicate strategy, and combining the judgment basis to automatically generate the duplicate strategy; executing the generated power restoration strategy to finish power restoration.
As a preferable scheme of the station bus voltage-loss-based power restoration method, the application comprises the following steps: the processed telemetry communication data accords with standard normal distribution, namely the mean value is 0, the standard deviation is 1, and the conversion function is as follows:
wherein μ is the mean value of all sample data, σ is the standard deviation of all sample data; x is the telemetry communication data before processing and x is the telemetry communication data after processing.
As a preferable scheme of the station bus voltage-loss-based power restoration method, the application comprises the following steps: the charging state includes that the following conditions are required to be satisfied in the charging state judgment: the bus corresponding to the duplicate unit is in a pressed state, the main transformer switch communicated with the bus corresponding to the duplicate unit has current, the bus corresponding to the duplicate unit has a duplicate path, one and only one switch in the duplicate path is in a hot standby state, and the other switches are in a closed state.
As a preferable scheme of the station bus voltage-loss-based power restoration method, the application comprises the following steps: the locking state comprises the following conditions that the locking state judgment needs to be satisfied: the 110kV bus busbar differential protection action of the 220kV station where the return unit is located is not more than 10 minutes after the return or not more than 10 minutes after the return of the backup protection action of the main transformer.
As a preferable scheme of the station bus voltage-loss-based power restoration method, the application comprises the following steps: the triggering state comprises that the triggering state judges that one of the following conditions needs to be met: the 220kV busbar differential protection action of the 220kV station where the return unit is positioned is not more than 10 minutes after the return; the main transformer main protection action of the 220kV station where the power recovery unit is located is not more than 10 minutes after the main transformer main protection action is recovered; the 220kV bus of the 220kV station where the complex electricity unit is located is in a voltage-losing state.
As a preferable scheme of the station bus voltage-loss-based power restoration method, the application comprises the following steps: the automatic generation model of the complex electricity strategy comprises,
w ij (t+1)＝w ij (t)+α(d i -y i )x j (t)
wherein w is ij (t+1) represents the connection weight from neuron j to neuron i at time t+1, w ij (t) represents the connection weight of neuron j to neuron i at time t, d i Is the expected output of neuron i, y i Is the actual output of neuron i, x j (t) represents the state of the neuron j at time t, a is a constant representing the learning speed, and t is time.
As a preferable scheme of the station bus voltage-loss-based power restoration method, the application comprises the following steps: the power distribution network background system also comprises a connection weight w for controlling the neurons j to the neurons i when judging the charging state of the complex electric unit ij To allocate the voltage and current in the power grid line node to obtain the connection weight w in the activated state ij To ensure that charging is performed normally; when judging the locking state, the power distribution network background system controls the connection weight w of the neuron j to the neuron i ij To allocate the voltage and current in the power grid line node to obtain the connection weight w in the inhibition state ij When the background system of the power distribution network is notified by the duplicate electricity, the neuron j is sent toConnection weight w of neuron i ij Adjusting to an activated state; when judging the triggering state, the power distribution network background system controls the connection weight w from the neuron j to the neuron i ij To allocate the voltage and current in the power grid line node to obtain the connection weight w in the activated state ij So as to ensure normal power restoration.
As a preferable scheme of the station bus voltage-loss-based power restoration method, the application comprises the following steps: the re-electricity strategy comprises the steps of judging whether the charging state of a re-electricity unit is met, if so, setting the re-electricity unit as the charging state, if not, setting the re-electricity unit to discharge, judging whether the re-electricity unit is discharged, if not, judging the discharging state, triggering state and locking state of the re-electricity unit, and if the discharging is ended, re-reading telemetering communication data; judging whether the locking state of the duplicate electric unit is satisfied, locking the duplicate electric unit and re-reading the telemetering communication data if the locking state of the duplicate electric unit is satisfied, unlocking the duplicate electric unit if the locking state of the duplicate electric unit is not satisfied, judging whether the discharge of the duplicate electric unit is ended, and judging the discharge state, the triggering state and the locking state of the duplicate electric unit if the discharge is not ended; judging whether the triggering state of the duplicate electric unit is satisfied, if so, setting the duplicate electric unit as a triggerable state, judging the discharging state, the triggering state and the locking state of the duplicate electric unit, and if not, re-reading the telemetering communication data; and finishing the power restoration until the generated strategy meets the triggering state of the power restoration unit.
The application has the beneficial effects that: according to the application, the complex electricity strategy is automatically produced through the model, so that the working efficiency is greatly improved; and the accuracy of the duplicate calculation is improved by judging the state of the duplicate unit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is a schematic flow chart of a power restoration method based on voltage loss of a bus of a station according to a first embodiment of the present application.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present application can be understood in detail, a more particular description of the application, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
While the embodiments of the present application have been illustrated and described in detail in the drawings, the cross-sectional view of the device structure is not to scale in the general sense for ease of illustration, and the drawings are merely exemplary and should not be construed as limiting the scope of the application. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Also in the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper, lower, inner and outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected, and coupled" should be construed broadly in this disclosure unless otherwise specifically indicated and defined, such as: can be fixed connection, detachable connection or integral connection; it may also be a mechanical connection, an electrical connection, or a direct connection, or may be indirectly connected through an intermediate medium, or may be a communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1, in a first embodiment of the present application, a method for power recovery based on voltage loss of a bus of a plant is provided, including:
s1: and reading telemetry communication data for normalization data processing.
The processed telemetry communication data accords with standard normal distribution, namely the mean value is 0, the standard deviation is 1, and the conversion function is as follows:
wherein μ is the mean value of all sample data, σ is the standard deviation of all sample data; x is the telemetry communication data before processing and x is the telemetry communication data after processing.
S2: and judging the charging state, the locking state and the triggering state of the complex electric unit according to the processing result.
The charge state judgment needs to satisfy the following conditions: the bus corresponding to the duplicate unit is in a pressed state, the main transformer switch communicated with the bus corresponding to the duplicate unit has current, the bus corresponding to the duplicate unit has a duplicate path, one and only one switch in the duplicate path is in a hot standby state, and the other switches are in a closed state.
The blocking state judgment needs to meet the following conditions: the 110kV bus busbar differential protection action of the 220kV station where the return unit is located is not more than 10 minutes after the return or not more than 10 minutes after the return of the backup protection action of the main transformer.
The trigger state judgment needs to meet one of the following conditions: the 220kV busbar differential protection action of the 220kV station where the return unit is positioned is not more than 10 minutes after the return; the main transformer main protection action of the 220kV station where the power recovery unit is located is not more than 10 minutes after the main transformer main protection action is recovered; the 220kV bus of the 220kV station where the complex electricity unit is located is in a voltage-losing state.
S3: and constructing an automatic generation model of the duplicate strategy, and combining the judgment basis to automatically generate the duplicate strategy.
In this embodiment, a complex electric strategy automatic generation model is built based on a Delta learning rule, which is a simple guided learning algorithm that adjusts the connection weight according to the difference between the actual output and the expected output of neurons, and the mathematical expression is as follows:
w ij (t+1)＝w ij (t)+α(d i -y i )x j (t)
wherein w is ij (t+1) represents the connection weight from neuron j to neuron i at time t+1, w ij (t) represents the connection weight of neuron j to neuron i at time t, d i Is the expected output of neuron i, y i Is the actual output of neuron i, x j (t) represents the state of the neuron j at time t, a is a constant representing the learning speed, and t is time; x if neuron j is in an active state j 1, x is the number x if in the suppressed state j 0 or-1 (depending on the activation function); let x be i 1, if d i Ratio y i Large then w ij Will increase if d i Ratio y i Small, then w ij Will become smaller.
The Delta rule is simply described as: if the actual output of the neuron is larger than the expected output, the weights of all the connections with positive inputs are reduced, and the weights of all the connections with negative inputs are increased, otherwise, if the actual output of the neuron is smaller than the expected output, the weights of all the connections with positive inputs are increased, and the weights of all the connections with negative inputs are reduced.
When judging the duplicate electric billIn the state of charge of the cells, the distribution network background system controls (program code runs) the connection weight w of the cell j (circuit node j) to the cell i (circuit node i) ij (connecting line weight) to allocate voltage and current in the line node of the power grid, and obtaining the connection weight w in an activated state through calculation ij To ensure that the charging is performed normally.
When judging the locking state, the power distribution network background system controls (running program code) the connection weight w of the neuron j (circuit node j) to the neuron i (circuit node i) ij (connecting line weight) to allocate voltage and current in the line node of the power grid, and obtaining the connection weight w in the inhibition state by calculation ij When the background system of the power distribution network obtains a duplicate notification, the connection weight w from the neuron j (circuit node j) to the neuron i (circuit node i) is further calculated ij The (link weights) are adjusted to the active state (program code running).
When judging the triggering state, the power distribution network background system controls (running program codes) the connection weight w of the neuron j (circuit node j) to the neuron i (circuit node i) ij (connecting line weight) to allocate voltage and current in the line node of the power grid, and obtaining the connection weight w in an activated state through calculation ij So as to ensure normal power restoration.
S4: executing the generated power restoration strategy to finish power restoration.
Executing a power recovery strategy:
(1) Judging whether the charging state of the duplicate electric unit is satisfied, if so, setting the duplicate electric unit as the charging state, if not, setting the duplicate electric unit to discharge, judging whether the duplicate electric unit is discharged, if not, judging the discharging state, the triggering state and the locking state of the duplicate electric unit, and if the discharging is ended, re-reading the telemetering communication data;
(2) Judging whether the locking state of the duplicate electric unit is satisfied, locking the duplicate electric unit and re-reading the telemetering communication data if the locking state of the duplicate electric unit is satisfied, unlocking the duplicate electric unit if the locking state of the duplicate electric unit is not satisfied, judging whether the discharge of the duplicate electric unit is ended, and judging the discharge state, the triggering state and the locking state of the duplicate electric unit if the discharge is not ended;
(3) Judging whether the triggering state of the duplicate electric unit is satisfied, if so, setting the duplicate electric unit as a triggerable state, judging the discharging state, the triggering state and the locking state of the duplicate electric unit, and if not, re-reading the telemetering communication data;
(4) And finishing the power restoration until the generated strategy meets the triggering state of the power restoration unit.
Example 2
In order to verify and explain the technical effects adopted in the method, the embodiment selects the traditional technical scheme and adopts the method to carry out comparison test, and the test results are compared by means of scientific demonstration so as to verify the true effects of the method.
In this embodiment, the state of the duplicate electric unit is respectively judged and compared by adopting the conventional technical scheme and the method, and the accuracy of duplicate electric calculation is counted, and the result is shown in the following table.
Table 1: and (5) comparing the complex electric effect.
From the table, the method can accurately judge the state of the duplicate electric unit, and the accuracy of duplicate electric calculation is obviously improved.
It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application, which is intended to be covered in the scope of the claims of the present application.
Claims (2)
1. A power recovery method based on station bus voltage loss is characterized in that: comprising the steps of (a) a step of,
reading telemetry communication data to perform normalization data processing;
judging the charging state, the locking state and the triggering state of the duplicate cell according to the processing result;
constructing an automatic generation model of the duplicate strategy, and combining the judgment basis to automatically generate the duplicate strategy;
executing the generated duplicate supply strategy to finish duplicate supply;
the processed telemetry communication data accords with standard normal distribution, namely the mean value is 0, the standard deviation is 1, and the conversion function is as follows:
wherein μ is the mean value of all sample data, σ is the standard deviation of all sample data; x is telemetry communication data before processing, x is telemetry communication data after processing;
the state of charge may include a state of charge that,
the charge state judgment needs to satisfy the following conditions: the bus corresponding to the duplicate unit is in a pressed state, the main transformer switch communicated with the bus corresponding to the duplicate unit has current, the bus corresponding to the duplicate unit has a duplicate path, one and only one switch in the duplicate path is in a hot standby state, and the other switches are in a closed state;
the said locked-out state includes the state,
the blocking state judgment needs to meet the following conditions: the 110kV bus busbar differential protection action of the 220kV station where the return unit is positioned is not more than 10 minutes after the return or not more than 10 minutes after the return of the backup protection action of the main transformer;
the trigger state may include a state that,
the trigger state judgment needs to meet one of the following conditions: the 220kV busbar differential protection action of the 220kV station where the return unit is positioned is not more than 10 minutes after the return; the main transformer main protection action of the 220kV station where the power recovery unit is located is not more than 10 minutes after the main transformer main protection action is recovered; the 220kV bus of the 220kV station where the duplicate electric unit is located is in a voltage-losing state;
the automatic generation model of the complex electricity strategy comprises,
w ij (t+1)＝w ij (t)+α(d i -y i )x j (t)
wherein w is ij (t+1) represents the connection weight from neuron j to neuron i at time t+1, w ij (t) represents the connection weight of neuron j to neuron i at time t, d i Is the expected output of neuron i, y i Is the actual output of neuron i, x j (t) represents the state of the neuron j at time t, a is a constant representing the learning speed, and t is time;
the back-power strategy includes that,
judging whether the charging state of the duplicate electric unit is satisfied, if so, setting the duplicate electric unit as the charging state, if not, setting the duplicate electric unit to discharge, judging whether the duplicate electric unit is discharged, if not, judging the discharging state, the triggering state and the locking state of the duplicate electric unit, and if the discharging is ended, re-reading the telemetering communication data;
judging whether the locking state of the duplicate electric unit is satisfied, locking the duplicate electric unit and re-reading the telemetering communication data if the locking state of the duplicate electric unit is satisfied, unlocking the duplicate electric unit if the locking state of the duplicate electric unit is not satisfied, judging whether the discharge of the duplicate electric unit is ended, and judging the discharge state, the triggering state and the locking state of the duplicate electric unit if the discharge is not ended;
judging whether the triggering state of the duplicate electric unit is satisfied, if so, setting the duplicate electric unit as a triggerable state, judging the discharging state, the triggering state and the locking state of the duplicate electric unit, and if not, re-reading the telemetering communication data;
and finishing the power restoration until the generated strategy meets the triggering state of the power restoration unit.
2. The station bus voltage loss based power recovery method according to claim 1, wherein: comprising the steps of (a) a step of,
when judging the charging state of the complex electricity unit, the power distribution network background system controls the connection weight w from the neuron j to the neuron i ij To allocate the voltage and current in the line node of the power grid to obtain the positionConnection weight w in active state ij To ensure that charging is performed normally;
when judging the locking state, the power distribution network background system controls the connection weight w of the neuron j to the neuron i ij To allocate the voltage and current in the power grid line node to obtain the connection weight w in the inhibition state ij When the background system of the power distribution network obtains a duplicate notification, the connection weight w from the neuron j to the neuron i is further calculated ij Adjusting to an activated state;
when judging the triggering state, the power distribution network background system controls the connection weight w from the neuron j to the neuron i ij To allocate the voltage and current in the power grid line node to obtain the connection weight w in the activated state ij So as to ensure normal power restoration.
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| US5524175A (en) * | 1992-10-29 | 1996-06-04 | Hitachi, Ltd. | Neuro-computer system for executing a plurality of controlling algorithms |
| CN101630835A (en) * | 2009-08-12 | 2010-01-20 | 国电南京自动化股份有限公司 | Bus-coupled or segmented charge protection method |
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