CN109308529B - Unit excitation function comprehensive performance evaluation method applied to network source platform - Google Patents
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Abstract
The invention discloses a method for evaluating the comprehensive performance of a unit excitation function applied to a network source platform, which comprises the following steps: step A: the network source platform is connected with data such as AVR input state, unit operation state, PSS input state required by provincial regulation, unit excitation device input year, unit non-stop caused by an excitation device, excitation device purchase cost, excitation device maintenance cost and the like of the unit; and B: performing examination and scoring on each subentry of the excitation function of the unit; and C: calculating the comprehensive performance score of the excitation function of the unit according to each subentry score of the excitation function of the unit; step D: and (5) displaying the score of the excitation function of the unit. The invention is used for evaluating the comprehensive performance of the excitation function of the unit by the network source platform, can monitor the comprehensive performance in real time, can clearly display the excitation function performance of each unit in real time on the network source platform, alarms the unit with unqualified excitation function, and can display each subentry score of the excitation function of the unit for checking.
Description
Technical Field
The invention relates to the field of power system machine network coordination, in particular to a comprehensive performance evaluation method for a unit excitation function applied to a network source platform.
Background
The generator automatic excitation regulator (AVR) can stabilize the generator terminal voltage of the generator by adjusting the exciting current, improve the static limit power of the unit, increase the transient stability of the unit and play an important role in the safe and stable operation of the unit. All local dispatches have clear requirements on the AVR input rate of the unit.
The interconnection degree of the current regional power grid is deepened, a Power System Stabilizer (PSS) is simple to realize, the damping of the system can be effectively increased, and the method is the most effective means for inhibiting the regional low-frequency oscillation. Scheduling in various places has clear requirements on the PSS input rate of the unit.
The microcomputer excitation device is generally arranged in an excitation room around the generator, and the service life of the microcomputer excitation device is influenced by the environmental temperature, the humidity and the electromagnetic interference; on the other hand, the microcomputer excitation device runs for a long time, the electronic components have service lives, and the service life of the excitation device does not exceed 12 years under normal conditions.
The unplanned shutdown of the unit affects the regulation and control operation and the safety and stability of the power system, and the unplanned shutdown of the unit may be caused when the excitation system of the unit fails, so that the unplanned shutdown of the unit is necessarily monitored, the hidden danger of the excitation system of the unit is timely discovered, and the durability of the excitation device of the unit is reflected by the proportion of the maintenance cost of the excitation system of the unit to the cost of the unit, so that the performance of the excitation system of the unit can be effectively evaluated and the subsequent safe operation of the excitation device can be guided by monitoring the maintenance investment of the excitation device of the unit.
The invention aims to establish a mechanism for carrying out real-time visual monitoring on the AVR input rate, the PSS input rate, the comprehensive performance of the age limit of the exciting device, the non-stop of the unit caused by the exciting system and the maintenance input of the exciting system on a set of network source platform, can compare the performance of different units, timely alarms the unit which does not reach the standard, carries out specific analysis on the reason of the unit which does not reach the standard, has important significance on the safe and stable operation of the unit, and has good application prospect.
Disclosure of Invention
The invention aims to provide a method for evaluating the comprehensive performance of the unit excitation function applied to a network source platform, aiming at the problems, so as to comprehensively evaluate the unit excitation function applied to the network source platform as a reference for unit maintenance.
In order to achieve the above object, the present invention adopts the following technical solutions.
A unit excitation function comprehensive performance evaluation method applied to a network source platform comprises the following steps:
step A: the network source platform is connected with data such as AVR input state, unit operation state, PSS input state required by provincial regulation, unit excitation device input year, unit non-stop caused by an excitation device, excitation device purchase cost, excitation device maintenance cost and the like of the unit;
and B: performing examination and scoring on each subentry of the excitation function of the unit;
and C: calculating the comprehensive performance score of the excitation function of the unit according to each subentry score of the excitation function of the unit;
step D: and (5) displaying the score of the excitation function of the unit.
The step B comprises the following steps:
calculation of PSS investment score: the PSS input rate = PSS input hours of the unit/PSS input hours of the unit required by province, the subentry reference is divided into 100 points, the PSS input rate of the unit is calculated in real time by the network source platform, when the PSS input rate is 100%, the corresponding score is 100 points, the input rate is reduced, the score is reduced, and when the input rate is lower than a certain threshold value, the subentry score is unqualified;
calculating the service life score of the excitation device: the subentry standard is 100, the longer the service life of the excitation device is, the lower the subentry score is, and the unqualified subentry score is obtained when the service life of the excitation device exceeds a certain threshold;
calculation of AVR engagement score: the AVR input rate = unit AVR input hours/unit actual operation hours, the subentry reference is divided into 100 points, the AVR input rate of the unit is calculated in real time by the network source platform, when the AVR input rate is 100%, the corresponding score is 100 points, the input rate is reduced, the score is reduced, and when the input rate is lower than a certain threshold value, the subentry score is unqualified;
and (3) calculating the non-stop score of the unit caused by the excitation system: the number of non-stop times of the computer unit caused by an excitation system is divided into 100 according to the sub-item standard, the more the non-stop times caused by the excitation system are, the lower the score is, and when the number of non-stop times caused by the excitation system exceeds a certain threshold value, the sub-item score is unqualified;
and (3) calculating the maintenance investment score of the excitation system: excitation system maintenance investment = excitation device maintenance cost accumulation/excitation device purchase cost, the division basis is divided into 100, the higher the excitation system maintenance investment is, the lower the score is, and when the excitation system maintenance investment is higher than a certain threshold value, the division score is unqualified.
The step C comprises the following steps:
and adding the PSS investment score, the exciting device service life score, the AVR investment score, the non-stop score of the unit caused by the exciting system and the maintenance investment score of the exciting system to obtain an average, namely the comprehensive performance score of the exciting function of the unit.
The step D comprises the following steps:
the method comprises the steps that the comprehensive performance scores of the excitation functions of different units are shown in the same bar chart, the height of each column in the bar chart can clearly show the comprehensive performance of the excitation functions of the units, and warning is given for the failure of the comprehensive performance scores of the excitation functions;
clicking the excitation function comprehensive performance grading histogram of a certain unit shown in the histogram can display the grading condition of each item of the excitation function of the unit, and the specific condition of the unit can be checked and analyzed.
The invention has the beneficial effects that: the method for evaluating the comprehensive performance of the excitation function of the unit applied to the network source platform can monitor the comprehensive performance of the unit accessed to the network source platform in real time in the aspects of AVR input rate, PSS input rate, excitation device age, unit non-stop caused by an excitation system, excitation system maintenance input and the like, compares different units in the daily operation of the unit, and can remind the unit with poor performance in time and warn the unqualified unit.
Drawings
FIG. 1 is a flow chart of the operation of the present invention;
FIG. 2 is a concrete implementation method of the unit excitation function sub-item assessment scoring in the step B;
FIG. 3 is a graph showing the overall performance scores of different units in step D;
FIG. 4 is a chart showing the scores of the items of a certain unit in step D.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, the method for evaluating the comprehensive performance of the excitation function of the unit applied to the network source platform comprises the following steps:
step A: the network source platform is connected with data such as AVR input state, unit operation state, PSS input state required by provincial regulation, unit excitation device input year, unit non-stop caused by an excitation device, excitation device purchase cost, excitation device maintenance cost and the like of the unit;
and B: performing examination and scoring on each subentry of the excitation function of the unit;
and C: calculating the comprehensive performance score of the excitation function of the unit according to each subentry score of the excitation function of the unit;
step D: and (5) displaying the score of the excitation function of the unit.
Referring to fig. 2, step B includes the following steps:
step B1: calculation of PSS investment score: the PSS input rate = the PSS input hours of the unit/the PSS input hours of the unit required by province, the item is divided into 100 parts, the PSS input rate of the unit is calculated by a network source platform in real time, the value is 100 parts when the PSS input rate is 100%, the input rate is reduced, the value is reduced, (for example, when the input rate is reduced by 0.1%, the value is reduced by 4 parts), and when the input rate is lower than a certain threshold value, the item is unqualified (for example, when the PSS input rate is 99%, the item is 60 parts);
step B2: calculating the service life score of the excitation device of the unit: the subentry standard is 100, the lower the subentry score is as the service life of the excitation device is longer (for example, the service life of the excitation device is 1 to 10 years and is reduced by 3 minutes per year; the service life of the excitation device is reduced by 5 minutes per year in 11 years and 12 years), and the subentry score is unqualified when the service life of the excitation device exceeds a certain threshold (for example, the subentry score is 60 minutes when the excitation device of the unit is used for 12 years);
step B3: calculation of AVR engagement score: the AVR input rate = unit AVR input hours/unit actual operation hours, the subentry reference score is 100, the AVR input rate of the unit is calculated in real time by the network source platform, the input rate is reduced when the AVR input rate is 100% and the corresponding score is 100, the value is reduced (for example, the input rate is reduced by 0.1% and the corresponding score is reduced by 4), and when the input rate is lower than a certain threshold value, the subentry score is unqualified (for example, when the input rate is 99%, the score is 60);
step B4: and (3) calculating the non-stop score of the unit caused by the excitation system: the number of times of non-stop caused by an excitation system of the computer unit is calculated, the sub-item reference is divided into 100 minutes, the more non-stop caused by the excitation system, the lower the score is (for example, the sub-item score is reduced by 20 minutes each time the non-stop caused by the excitation system is caused), and when the number of times of non-stop caused by the excitation system exceeds a certain threshold value, the sub-item score is unqualified (for example, when the number of times of non-stop caused by the excitation system is 2 times, the sub-item score is divided into 60 minutes);
step B5: and (3) calculating the maintenance investment score of the excitation system: exciter system maintenance investment = exciter system maintenance cost accumulation/exciter system purchase cost, the division basis is divided into 100, the higher the exciter system maintenance investment is, the lower the score is (for example, the division score is reduced by 4 per 1% increase of the exciter system maintenance investment), and when the exciter system maintenance investment is higher than a certain threshold, the division score is not good (for example, when the exciter system maintenance investment is 10%, the division score is 60).
The step C comprises the following steps:
and adding the PSS investment score, the exciting device service life score, the AVR investment score, the non-stop score of the unit caused by the exciting system and the maintenance investment score of the exciting system to obtain an average, namely the comprehensive performance score of the exciting function of the unit.
The step D comprises the following steps:
step D1: as shown in fig. 3, the overall performance scores of the excitation functions of the units of different units are represented in the same bar chart, the height of each column in the bar chart can clearly represent the overall performance of the excitation functions of the units, and an alarm is given for the failure of the overall performance scores of the excitation functions;
step D2: as shown in fig. 4, clicking on the histogram of the comprehensive performance score of the excitation function of a unit shown in D1 can display the score of each item of the excitation function of the unit, and can check and analyze the specific situation of the unit.
In summary, the invention provides a comprehensive evaluation method for the excitation function of a machine set applied to a network source platform, the AVR input rate subentry score and the PSS input rate subentry score of the unit are calculated by sampling the AVR input state and the PSS input state of the unit on a network source platform in real time, the input date of the unit excitation device is stored on the network source platform, automatically calculating the sub-item score of the exciting device of the unit on a network source platform, calculating the sub-item score of the non-stop of the unit caused by the exciting system and the maintenance investment score of the exciting device by the maintenance cost of the non-stop of the unit and the exciting system caused by the exciting system connected to the unit, thereby forming the comprehensive performance score of the excitation function of the unit, and carrying out the comparative display of different units, the system can realize real-time supervision on the comprehensive performance of the excitation function of the unit, alarm the unqualified unit and ensure safe and stable operation of the excitation function of the unit.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A unit excitation function comprehensive performance evaluation method applied to a network source platform is characterized by comprising the following steps:
step A: the method comprises the following steps that a network source platform is connected to an AVR (audio video recorder) input state, a unit operation state, a PSS (power system stabilizer) input state, a PSS input state required by provincial debugging, a unit excitation device input year, unit non-stop caused by an excitation device, excitation device purchase cost and excitation device maintenance cost data of a unit;
and B: the method for evaluating the excitation function of the unit specifically comprises the following steps:
calculation of PSS investment score: the PSS input rate = PSS input hours of the unit/PSS input hours of the unit required by province, the subentry reference is divided into 100 points, the PSS input rate of the unit is calculated in real time by the network source platform, when the PSS input rate is 100%, the corresponding score is 100 points, the input rate is reduced, the score is reduced, and when the input rate is lower than a certain threshold value, the subentry score is unqualified;
calculating the service life score of the excitation device: the subentry standard is 100, the longer the service life of the excitation device is, the lower the subentry score is, and the unqualified subentry score is obtained when the service life of the excitation device exceeds a certain threshold;
calculation of AVR engagement score: the AVR input rate = unit AVR input hours/unit actual operation hours, the subentry reference is divided into 100 points, the AVR input rate of the unit is calculated in real time by the network source platform, when the AVR input rate is 100%, the corresponding score is 100 points, the input rate is reduced, the score is reduced, and when the input rate is lower than a certain threshold value, the subentry score is unqualified;
and (3) calculating the non-stop score of the unit caused by the excitation system: the number of non-stop times of the computer unit caused by an excitation system is divided into 100 according to the sub-item standard, the more the non-stop times caused by the excitation system are, the lower the score is, and when the number of non-stop times caused by the excitation system exceeds a certain threshold value, the sub-item score is unqualified;
and (3) calculating the maintenance investment score of the excitation system: excitation system maintenance investment = excitation device maintenance cost accumulation/excitation device purchase cost, the division basis is divided into 100, the higher the excitation system maintenance investment is, the lower the score is, when the excitation system maintenance investment is higher than a certain threshold value, the division score is unqualified;
and C: calculating the comprehensive performance score of the excitation function of the unit according to each subentry score of the excitation function of the unit;
step D: and (5) displaying the score of the excitation function of the unit.
2. The method for evaluating the comprehensive performance of the excitation function of the unit applied to the network source platform according to claim 1, wherein the step C comprises the following steps:
and adding and averaging the PSS investment score, the exciting device service life score, the AVR investment score, the non-stop score of the unit caused by the exciting system and the maintenance investment score of the exciting system to obtain the comprehensive performance score of the exciting function of the unit.
3. The method for evaluating the comprehensive performance of the excitation function of the unit applied to the network source platform according to claim 2, wherein the step D comprises the following steps:
the method comprises the steps that the comprehensive performance scores of the excitation functions of different units are shown in the same bar chart, the height of each column in the bar chart can clearly show the comprehensive performance of the excitation functions of the units, and warning is given for the failure of the comprehensive performance scores of the excitation functions;
clicking the excitation function comprehensive performance grading histogram of a certain unit shown in the histogram can display the grading condition of each item of the excitation function of the unit, and the specific condition of the unit can be checked and analyzed.
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