CN111817432A - Method for solving abnormal terminal alarm - Google Patents

Method for solving abnormal terminal alarm Download PDF

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Publication number
CN111817432A
CN111817432A CN202010342859.6A CN202010342859A CN111817432A CN 111817432 A CN111817432 A CN 111817432A CN 202010342859 A CN202010342859 A CN 202010342859A CN 111817432 A CN111817432 A CN 111817432A
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alarm
slip
executing
setting
power
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CN202010342859.6A
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CN111817432B (en
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陈文敏
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Ningbo Sanxing Electric Co Ltd
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Ningbo Sanxing Electric Co Ltd
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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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • 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
    • 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
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/046—Signalling the blowing of a fuse
    • 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
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
    • H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
    • 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
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
    • H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
    • 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
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
    • H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)

Abstract

The invention relates to a method for solving abnormal terminal alarm, which is characterized by comprising the following steps: the method comprises S1, judging whether the monitoring time T is larger than or equal to the slip period T, if so, executing S2, and if not, executing S3; s2, calling a conventional slip power Pslip calculation formula, and executing S4; s3, calling a corrected slip power Pslip calculation formula and executing S4; and S4, judging whether the slip power Pslip is larger than Pset, if so, triggering an alarm, wherein P is a set alarm threshold. The invention well solves the problem of terminal monitoring alarm delay.

Description

Method for solving abnormal terminal alarm
Technical Field
The invention relates to the technical field of electric meters, in particular to a method for solving abnormal terminal alarm.
Background
The special transformer terminal is used as an important component of a national grid power system, is widely applied to places with large power consumption, such as factories and hotels, monitors the whole power consumption condition of an installation area in real time through a special control function, and once abnormal conditions such as power overrun occur in a monitoring area, the special transformer terminal gives an alarm and then trips, so that the power consumption safety is ensured.
Due to the fact that the quality of the power grid fluctuates, when the power in a monitoring area is short and exceeds the limit, the special transformer terminal cannot immediately perform alarm tripping, a period needs to be monitored continuously, and when the average total power in the period also exceeds the limit, abnormity is judged. In the industry, the monitoring period is named as a slip period, the average power in the slip period is defined as the slip power, and from the professional definition, the alarm condition is: when the average total power in the slip period is larger than or equal to the alarm threshold value, the terminal executes an alarm tripping action, namely P slip (t) is larger than or equal to P constant, and an alarm is triggered when the formula is met, wherein PSliding deviceRepresents the average value of the total power (hereafter referred to as the slip power) in the slip time, PStatorIndicating a set alarm threshold.
Obviously, P is the slip time after one slip cycle is fullSliding deviceEqual to the total power P in nearly 1 cycle timetAverage value of (i), i.e.
Figure RE-GDA0002675344230000011
However, when the alarm condition is set according to the formula, it is found that when the total power Pt is just equal to the alarm threshold value, that is, Pt is equal to P, the terminal should trigger an alarm at the T-th time, and as a result, the terminal does not trigger after a delay time of more than 1h, which causes the terminal to start an alarm after a long time, and the alarm delay causes the relay to trip in time, which may cause a large potential safety hazard.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method for solving an abnormal terminal alarm, which can accurately implement alarm triggering without changing the existing distribution room structure.
In order to achieve the purpose, the technical scheme of the invention is as follows: a method for solving terminal alarm abnormity is characterized in that: the method comprises the following steps of,
s1, judging whether the monitoring time T is larger than or equal to the slip period T, if so, executing S2, and if not, executing S3;
s2, calling a conventional slip power Pslip calculation formula, and executing S4;
s3, calling a corrected slip power Pslip calculation formula and executing S4;
and S4, judging whether the slip power Pslip is larger than Pset, if so, triggering an alarm, wherein P is a set alarm threshold.
Further, the method also comprises the step of executing tripping operation at the same time of triggering the alarm.
Furthermore, the method also comprises the step of generating an alarm event and reporting the alarm event to the main station after the triggering alarm and the tripping action are executed.
Further, the method includes continuing to monitor and jump to S1 when P slip is less than P timing.
Further, the method further includes, before performing S1, S0, where the alarm event is set to be valid and reported.
Further, the method further includes determining whether the setting is successful after performing S0, and performing S1 when the setting is successful.
Further, the method includes continuing to jump to execution S0 when the determination S0 is that the setting is unsuccessful.
Further, the conventional slip power pwlip is calculated by the formula,
Figure RE-GDA0002675344230000021
further, the corrected slip power pwlip is calculated by the formula,
Figure RE-GDA0002675344230000022
compared with the prior art, the invention has the advantages that: by carrying out sectional processing on the calculation of the slip power, judging the size relation between the time T and the slip period T, calculating according to a conventional definition formula when the time T is greater than or equal to the slip period, and making detection judgment according to the calculation, and calculating the slip power by adopting a formula with a linear growth relation when the time T is less than the slip period, the problem that the terminal alarm is abnormal is solved, and the power utilization safety of the terminal monitoring is improved.
Drawings
Fig. 1 is a flowchart of a method for solving a middle-high end alarm anomaly according to the present application.
FIG. 2 is a graph obtained by analysis of simulation software according to the method of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1, which is a schematic structural diagram of a preferred embodiment of the present invention, as shown in the figure, the method includes,
s1, judging whether the monitoring time T is larger than or equal to the slip period T, if so, executing S2, and if not, executing S3;
s2, calling a conventional slip power Pslip calculation formula, and executing S4;
s3, calling a corrected slip power Pslip calculation formula and executing S4;
and S4, judging whether the slip power Pslip is larger than Pset, if so, triggering an alarm, wherein P is a set alarm threshold.
In order to ensure the safety of electricity utilization, the method executes tripping operation at the same time of executing triggering alarm. Meanwhile, after the method executes the triggering alarm and the tripping action, an alarm event is also generated and reported to the main station. The alarm event is reported to the main station, so that the staff can know the abnormal monitoring area in time, and the corresponding measures can be taken in time, and the monitoring accuracy and the electricity utilization safety can be further ensured.
Of course, in order to ensure the integrity of the monitoring judgment, the method further includes continuing to monitor and jump to S1 when P slip is less than P timing. Meanwhile, step S0 is included before S1 is executed, that is, when an alarm event is set to exist, the alarm event is valid and reported.
To avoid this problem, since sometimes a system problem may cause the setting to be unsuccessful, the method further includes determining whether the setting is successful after performing S0, and performing S1 when the setting is successful, and continuing to jump to perform S0 when the setting is not successful at S0 until the setting is successful.
Preferably, the conventional slip power pwlip is calculated by the formula,
Figure RE-GDA0002675344230000031
correspondingly, the corrected slip power pwlip is calculated by the formula,
Figure RE-GDA0002675344230000032
that is, when the time T is less than the slip period T, the average value of the total power added in the early stage is taken, and after one period is completed, the calculation is defined according to the conventional slip power, so that the slip power is calculated in a segmented mode, the simplest linear increase is preferentially considered under the condition that the value of the T-less slip period part is guaranteed to be nonzero and is normally connected with the rear stage, namely, the mode of summing and averaging the total power sampling values at all the moments in the early stage can well solve the problem of alarm delay.
The invention calculates the slip power by section, and judges the relationship between the time T and the slip period T, when T is more than or equal to the slip period, the calculation is carried out according to the conventional definition formula and the detection judgment is made according to the conventional formula, and when T is less than the slip period, the slip power is calculated by adopting the formula with the linear growth relationship, so that when the total power meets the alarm threshold, namely Pt is more than or equal to P, and the terminal is less than or equal to the slip period, the alarm can still be triggered without time delay, thereby solving the abnormal alarm problem of the terminal and improving the power utilization safety of the terminal in monitoring.
FIG. 2 is a diagram of the analysis of the total P added by simulation softwaret＝PStatorWhen T is 1000w and T is 5min, drawing PSliding deviceThe curves are shown in FIG. 2。
It can be seen that when the total power sum just meets the alarm threshold, i.e., Pt＝PStatorWhen is, PSliding deviceReaches 1000w at 5min, and satisfies PSliding device(t)≥PStatorThe theoretical analysis result of the alarm condition (2): the alarm is normal, i.e. when the total power added meets the alarm threshold (P)t≥PStator) And the terminal triggers an alarm at the time less than or equal to the slip cycle without delay.
While embodiments of the invention have been shown and described, it will be understood by those skilled in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A method for solving terminal alarm abnormity is characterized in that: the method comprises the following steps of,
s1, judging whether the monitoring time T is larger than or equal to the slip period T, if so, executing S2, and if not, executing S3;
s2, calling a conventional slip power Pslip calculation formula, and executing S4;
s3, calling a corrected slip power Pslip calculation formula and executing S4;
and S4, judging whether the slip power Pslip is larger than Pset, if so, triggering an alarm, wherein P is a set alarm threshold.
2. The method of claim 1, further comprising:
the method further comprises performing a trip while triggering the alarm.
3. The method of claim 2, further comprising:
the method also comprises the steps of generating an alarm event and reporting the alarm event to the main station after the triggering alarm and the tripping action are executed.
4. The method of claim 3, further comprising:
the method further includes continuing to monitor and jump to execution S1 when Plout is less than Ptiming.
5. The method of claim 1, further comprising:
the method further includes, prior to performing S1, S0, setting to be active and reporting when an alarm event exists.
6. The method of claim 4, further comprising:
the method further includes determining whether the setting is successful after performing S0, and performing S1 when the setting is successful.
7. The method according to claim 5 or 6, wherein:
the method further includes determining whether the setting is successful after performing S0, and performing S1 when the setting is successful.
8. The method of claim 7, further comprising:
the method further includes continuing to jump to execution S0 upon determining that the setting of S0 is unsuccessful.
9. The method of claim 1, further comprising:
the conventional slip power pwlip calculation formula is,
Figure FDA0002469067180000011
10. the method of claim 1, further comprising:
the corrected slip power pwlip is calculated by the formula,
Figure FDA0002469067180000012
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CN102087305A (en) * 2010-12-10 2011-06-08 宁波三星电气股份有限公司 Method for processing active demand of energy meter
CN103809150A (en) * 2012-11-15 2014-05-21 国家电网公司 Method for testing demand of electric energy meter
CN106841773A (en) * 2016-12-26 2017-06-13 深圳市科陆电子科技股份有限公司 Recognize the method and system of bad load
CN108829643A (en) * 2018-06-29 2018-11-16 宁波三星智能电气有限公司 A kind of requirement calculation method of intelligent electric meter
CN110544181A (en) * 2019-08-23 2019-12-06 南京国电南自电网自动化有限公司 method, system and storage medium for calculating maximum demand of electric power

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CN102087305A (en) * 2010-12-10 2011-06-08 宁波三星电气股份有限公司 Method for processing active demand of energy meter
CN103809150A (en) * 2012-11-15 2014-05-21 国家电网公司 Method for testing demand of electric energy meter
CN106841773A (en) * 2016-12-26 2017-06-13 深圳市科陆电子科技股份有限公司 Recognize the method and system of bad load
CN108829643A (en) * 2018-06-29 2018-11-16 宁波三星智能电气有限公司 A kind of requirement calculation method of intelligent electric meter
CN110544181A (en) * 2019-08-23 2019-12-06 南京国电南自电网自动化有限公司 method, system and storage medium for calculating maximum demand of electric power

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