CN111614162B - Performance evaluation method of transformer substation monitoring system based on avalanche test - Google Patents
Performance evaluation method of transformer substation monitoring system based on avalanche test Download PDFInfo
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- CN111614162B CN111614162B CN202010445722.3A CN202010445722A CN111614162B CN 111614162 B CN111614162 B CN 111614162B CN 202010445722 A CN202010445722 A CN 202010445722A CN 111614162 B CN111614162 B CN 111614162B
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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
- H02J13/00006—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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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
- H02H7/26—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
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- 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
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- 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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- 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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The application relates to a performance evaluation method of a transformer substation monitoring system based on an avalanche test, which is characterized in that a remote signaling signal is set and counted, and meanwhile, remote signaling avalanche simulation and remote signaling avalanche simulation are realized, in the simulation process, different grades of remote signaling avalanche simulation and remote signaling avalanche simulation are carried out, the state of a transformer substation to be tested is monitored, and the performance grade of the transformer substation monitoring system to be tested is obtained. The application can intuitively see the performance condition of the substation monitoring system and is convenient for an electric company to evaluate the performance of the substation monitoring system.
Description
Technical Field
The application belongs to the technical field of power grids, in particular to the field of performance test and evaluation of a substation monitoring system in a power dispatching automation system, and relates to a performance evaluation method of the substation monitoring system based on avalanche test.
Background
According to the network data flow condition of the substation dispatching automation system, the running state of the substation can be divided into: normal state, emergency state, critical state.
The accuracy and timeliness of the signals are critical to the power grid, and are the basis of safe operation of the power grid, so that the performance of the transformer substation monitoring system is particularly critical.
In emergency situations, for example, when a part of the transformer substation trips in a fault, particularly when a bus is out of gate, signals are sent up in a concentrated manner, and part of the signals are lost or wrong due to insufficient performance of a transformer substation monitoring system. In critical state of the transformer substation, the transformer substation receives a large amount of data including line tripping, remote switching, voltage breakdown, frequency drop and the like in a short time, and if the monitoring system is in fault, the remote information is easy to be lost and even the remote is interrupted, and the fault is possibly enlarged and the like. Therefore, the method has important significance in scientific evaluation of the performance of the transformer substation monitoring system.
Disclosure of Invention
The technical problem to be solved by the application is to overcome the defects in the prior art, and provide the performance evaluation method of the substation monitoring system based on the avalanche test, so that the performance condition of the substation monitoring system can be intuitively seen, and the performance of the substation monitoring system can be conveniently evaluated by an electric company.
The technical scheme adopted for solving the technical problems is as follows: setting the remote signaling signals and counting the remote signaling signals, and simultaneously realizing remote signaling avalanche simulation and remote sensing avalanche simulation, wherein in the simulation process, the remote signaling avalanche simulation and the remote sensing avalanche simulation of different grades are performed, the state of a tested transformer substation is monitored, and the performance grade of the monitoring system of the tested transformer substation is obtained.
Further, the remote signaling avalanche simulation is to set a remote signaling signal, and from sending one remote signaling shift every few seconds to thousands of remote signaling shifts every second, the remote signaling avalanche simulation of different grades is realized;
the telemetry avalanche simulation is realized by sending one change telemetry from a few seconds to hundreds of thousands of change telemetry per second in a telemetry counting mode, and different grades of telemetry avalanche simulation are realized.
Further, it comprises the following steps,
(1) Setting the ratio of the remote signaling avalanche density to the remote signaling avalanche density;
(2) And (3) under the proportion set in the step (1), gradually increasing the telemetry avalanche density and the telemetry avalanche density, performing avalanche test, measuring the minimum comprehensive avalanche density sigma (lost) when the problem occurs in the telemetry signal, the telemetry signal or the avalanche test inspection item, and obtaining the performance grade of the substation monitoring system.
Further, in the step (1), the remote signaling avalanche density is:
wherein sigma yx Avalanche density for telemetry;
t is avalanche duration;
N yx transmitting the number of remote signaling shifts in the avalanche duration time;
in step (1), the telemetry avalanche density is:
wherein sigma yc For telemetry of avalanche density;
t is avalanche duration;
N yc for the avalanche duration, a varying telemetry number is sent.
Further, in the step (1), the ratio of the telemetry avalanche density to the telemetry avalanche density is:
wherein N is yc Transmitting a varying telemetry number for the avalanche duration;
N yx for the duration of the avalanche, the number of remote signaling shifts is sent.
Further, in the step (2), the integrated avalanche density is:
σ＝σ yx +γ*σ yc ＝σ yx +α*γ*σ yx (6)
wherein σ is the integrated avalanche density;
alpha is the ratio of the telemetry number to the telemetry number in the tested transformer substation;
gamma is the remote signaling and remote sensing avalanche performance influence factor ratio;
σ yc for telemetry of avalanche density;
σ yx is the remote signaling avalanche density.
Further, the method comprises the steps of,
wherein lambda is yc Is a telemetry avalanche performance impact factor;
λ yx is a telemetry avalanche performance impact factor;
gamma is the remote signaling and remote sensing avalanche performance influence factor ratio; lambda (lambda) yc 、λ yx As to avalanche density sigma x Is a statistical value of (a).
Further, in the step (2), the performance grade of the substation monitoring system is divided into four grades: beta=1, beta=2, beta=3, beta=4;
wherein beta is the performance grade of the substation monitoring system.
Further, for the same voltage class substation monitoring system:
a＜b＜c (8)；
for different voltage class substation monitoring systems, the avalanche performance class demarcation point values a, b and c are different, each increasing with increasing voltage class.
Further, the avalanche test inspection item includes the following:
(1) Checking whether a report missing, a false report avalanche test remote signaling or a remote measuring signal exists in a simulation scheduling master station system and a monitoring background;
(2) During the avalanche simulation process, remote control operation is carried out in a monitoring background, whether a corresponding device acts correctly or not is checked, and whether a simulation scheduling master station reacts correctly or not is checked;
(3) During the avalanche simulation process, actual telemetering refreshing is carried out, and whether the monitoring background and the simulation scheduling master station react correctly or not is checked;
(4) During the avalanche simulation process, performing actual protection action, and checking whether the monitoring background and the simulation scheduling master station react correctly;
(5) During the avalanche simulation process, actual calling protection fixed value is carried out, and whether the function is normal is checked;
(6) During the avalanche simulation process, performing actual linkage verification, and checking whether the function is normal;
(7) During the avalanche simulation, whether the CPU load rate, the network load rate, the memory occupancy rate and the system response time of the station layer equipment are normal or not is checked.
The application has the beneficial effects that:
1. the application adopts a software command setting mode to simulate the remote signaling signal, adopts a software command setting mode to perform remote sensing simulation, and gradually increases the remote signaling and remote sensing avalanche density to realize remote signaling and remote sensing avalanche simulation of different grades, and the testing process does not depend on actual spacer layer equipment, thereby being convenient to realize.
2. According to the application, proper remote signaling, remote measurement proportion and number are selected for simulation according to the actual condition of the monitored substation monitoring system, so that the condition of the substation is reflected more truly.
3. The application has different parameter requirements for judging the performance grade of transformer substation monitoring systems with different voltage grades, and is more in line with the actual situation.
4. According to the avalanche test evaluation results, namely the good, medium and bad, the performance condition of the substation monitoring system can be visually seen, the power company is convenient to evaluate the performance of the substation monitoring system, and equipment manufacturers are promoted to gradually improve the performance level of the equipment.
Drawings
FIG. 1 is an avalanche test environment diagram of a substation monitoring system of the present application;
fig. 2 is a performance rating chart of the substation monitoring system according to the present application.
Detailed Description
The application is further described in connection with the following examples, but the scope of the application is not limited thereto, but is set forth in the following claims. The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As shown in fig. 1-2, the overall idea of the application is: setting the remote signaling signals and counting the remote signaling signals, and simultaneously realizing remote signaling avalanche simulation and remote sensing avalanche simulation, wherein in the simulation process, the remote signaling avalanche simulation and the remote sensing avalanche simulation of different grades are performed, the state of a tested transformer substation is monitored, and the performance grade of the monitoring system of the tested transformer substation is obtained.
The remote signaling avalanche simulation is to set a remote signaling signal in a software command mode, and the remote signaling avalanche simulation of different grades is realized from sending one remote signaling shift every few seconds to thousands of remote signaling shifts every second;
the remote sensing avalanche simulation is that a remote sensing number setting mode is performed in a software command mode, so that one change telemetry is sent from a few seconds to hundreds of thousands of change telemetry per second, and different levels of remote sensing avalanche simulation are realized.
Wherein the specific number and frequency in the telemetry avalanche simulation and the telemetry avalanche simulation may be configured as desired.
And at the same time, software commands are adopted to set the telemetry signal and count the telemetry signal, so that the telemetry avalanche and the telemetry avalanche simulation are realized.
According to the actual situation, proper remote signaling, telemetry proportion and number are selected for simulation, the situation of a transformer substation can be reflected more truly, and by taking a certain 500kV transformer substation as an example, the proportion of the remote signaling and telemetry average number of the transformer substation is 7:1.
The present embodiment specifically includes the following steps,
(1) Setting the ratio of the remote signaling avalanche density to the remote sensing avalanche density by combining the remote signaling and remote sensing actual conditions of a monitored substation monitoring system;
(2) And (3) under the proportion set in the step (1), gradually increasing the telemetry avalanche density and the telemetry avalanche density, performing avalanche test, measuring the minimum comprehensive avalanche density sigma (lost) when the problem occurs in the telemetry signal, the telemetry signal or the avalanche test inspection item, and obtaining the performance grade of the substation monitoring system.
The explanation is made on the condition that when the problem occurs in the event of starting to lose the remote signaling, the remote signaling or the avalanche test checking item, the condition that the problem occurs in the event of starting to lose the remote signaling and the remote signaling, or the condition that the problem occurs in the avalanche test checking item or the two conditions occur simultaneously, and when the three conditions occur, the minimum comprehensive avalanche density sigma (lost) at the time is recorded.
The situation that the remote signaling signal and the remote measuring signal are lost is that any one of the two signals is lost, including the loss of the remote signaling signal, the loss of the remote measuring signal or the simultaneous loss of the two signals.
In the step (1), the remote signaling avalanche density is:
wherein sigma yx Avalanche density for telemetry; according to the application, different grades of remote signaling avalanche simulation can be realized through different remote signaling avalanche densities;
t is avalanche duration;
N yx transmitting the number of remote signaling shifts within the avalanche duration time T;
in step (1), the telemetry avalanche density is:
wherein sigma yc For telemetry of avalanche density; the application can realize telemetry avalanche simulation of different grades through different telemetry avalanche densities;
t is avalanche duration;
N yc for the avalanche duration T, a varying telemetry number is sent.
In the step (1), according to the above formula (1) and formula (2), the ratio of the telemetry avalanche density to the telemetry avalanche density is:
wherein N is yc Transmitting a varying telemetry number for the avalanche duration;
N yx for the duration of the avalanche, the number of remote signaling shifts is sent.
When the remote signaling and the remote sensing avalanche test are simultaneously carried out, according to the formulas (1), (2) and (3), there are
σ yc ＝α*σ yx (4)
The remote signaling and remote sensing avalanche performance influence factor ratio is as follows:
wherein lambda is yc Is a telemetry avalanche performance impact factor;
λ yx is a telemetry avalanche performance impact factor;
gamma is the telemetry avalanche performance impact factor ratio. I.e., 1 unit telemetry density and gamma unit telemetry density have the same effect on the monitoring system. Lambda (lambda) yc 、λ yx As to avalanche density sigma x Can be obtained by a number of avalanche detection tests, typically lambda yx ＝1。
For example, describing the above formula, if the telemetry avalanche density is 100, and the telemetry avalanche density is 200, the performance of the substation monitoring system is affected, then γ is 2 (λ yc ＝2、λ yx =1); the gamma and avalanche density sigma can be obtained through a large number of similar tests x And then counted as a data table. The gamma value can be obtained by looking up a table and the like during the performance evaluation test of the actual transformer substation monitoring system.
Comprehensive avalanche density definition: according to the influence on the performance of the monitoring system, the telemetering avalanche density is also converted into a remote signaling avalanche density according to formulas (4) and (5), and in the step (2), the comprehensive avalanche density is as follows:
σ＝σ yx +γ*σ yc ＝σ yx +α*γ*σ yx (6)
wherein σ is the integrated avalanche density;
alpha is the ratio of the telemetry number to the telemetry number in the tested transformer substation; referring to formula (3);
gamma is the remote signaling and remote sensing avalanche performance influence factor ratio; i.e. when transmitting telemetry avalanche density sigma yc The performance of the monitoring system is affected, which is equivalent to the remote signaling avalanche density of gamma sigma yc The remote signaling avalanche of (a) affects the monitoring system;
σ yc for telemetry of avalanche density;
σ yx is the remote signaling avalanche density.
In the step (2), the performance grade β of the substation monitoring system is divided into four grades: beta=1, beta=2, beta=3, beta=4;
wherein beta is the performance grade of the substation monitoring system.
Sigma (lost) is avalanche test, increasing the avalanche density of remote signaling, the avalanche density of remote signaling (according to proportion), and measuring the minimum comprehensive avalanche density of the problem of the remote signaling, the loss of remote signaling or the detection project of avalanche test.
a. b and c are three comprehensive avalanche density key values, are demarcation points of 4 avalanche performance grades (excellent, good, medium and bad), and are used for monitoring the system of the transformer substation with the same voltage grade.
a＜b＜c (8)
For transformer substation monitoring systems with different voltage levels, the avalanche performance level demarcation point values a, b and c are different, and the specific values of a, b and c can be set for the requirements of the transformer substation monitoring systems more practically, and each avalanche performance level demarcation point value is increased along with the increase of the voltage level.
Taking 35kV, 110kV, 220kV and 500kV voltage levels as examples, the following conditions are satisfied:
for substations with different voltage classes, the avalanche performance class demarcation point values are different, the comprehensive avalanche density key value is increased along with the voltage class rise, and the voltage classes of 35kV, 110kV, 220kV and 500kV are taken as examples, so that the requirements are satisfied:
according to the avalanche test evaluation result, the performance of the substation monitoring system can be visually seen by optimizing (beta=1), optimizing (beta=2), optimizing (beta=3) and optimizing (beta=4), so that the power company can evaluate the performance of the substation monitoring system conveniently, and equipment manufacturers can be promoted to gradually improve the performance level of the equipment.
In the application, sigma (lost) is the minimum comprehensive avalanche density of the problem of the remote signaling, the remote signaling signal loss or the avalanche test checking item, namely, if any one of the remote signaling, the remote signaling signal loss or the avalanche test checking item is generated, the corresponding minimum comprehensive avalanche density is sigma (lost) for judging beta.
Wherein the avalanche test inspection item includes the following:
(1) Checking whether a report missing, a false report avalanche test remote signaling or a remote measuring signal exists in a simulation scheduling master station system and a monitoring background;
(2) During the avalanche simulation process, remote control operation is carried out in a monitoring background, whether a corresponding device acts correctly or not is checked, and whether a simulation scheduling master station reacts correctly or not is checked;
(3) During the avalanche simulation process, actual telemetering refreshing is carried out, and whether the monitoring background and the simulation scheduling master station react correctly or not is checked;
(4) During the avalanche simulation process, performing actual protection action, and checking whether the monitoring background and the simulation scheduling master station react correctly;
(5) During the avalanche simulation process, actual calling protection fixed value is carried out, and whether the function is normal is checked;
(6) During the avalanche simulation process, performing actual linkage verification, and checking whether the function is normal;
(7) During the avalanche simulation, whether or not the CPU load factor, network load factor, memory occupancy, and system response time of the checkpoint device are normal or not is considered to be a situation in which the avalanche test inspection item is problematic if any of the above (1) to (7) occurs.
According to the condition of the monitored substation monitoring system, the normal state, the emergency state and the crisis state of the power grid are simulated through avalanche tests of different grades, the voltage grade is combined, and the performance of the substation monitoring system is rated according to different reactions of the monitoring system.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A transformer substation monitoring system performance evaluation method based on avalanche test is characterized by comprising the following steps: setting the remote signaling signals and counting the remote signaling signals, and simultaneously realizing remote signaling avalanche simulation and remote sensing avalanche simulation, wherein in the simulation process, the remote signaling avalanche simulation and the remote sensing avalanche simulation of different grades are carried out, the state of a tested transformer substation is monitored, and the performance grade of a monitoring system of the tested transformer substation is obtained;
which comprises the steps of the following steps of,
(1) Setting the ratio of the remote signaling avalanche density to the remote signaling avalanche density;
(2) Gradually increasing the telemetry avalanche density and the telemetry avalanche density under the proportion set in the step (1), performing avalanche test, measuring the minimum comprehensive avalanche density sigma (lost) when the problem occurs in the telemetry signal, the telemetry signal or the avalanche test checking item,
obtaining the performance grade of a transformer substation monitoring system;
in the step (1), the remote signaling avalanche density is:
wherein sigma yx Avalanche density for telemetry;
t is avalanche duration;
N yx transmitting the number of remote signaling shifts in the avalanche duration time;
in step (1), the telemetry avalanche density is:
wherein sigma yc For telemetry of avalanche density;
t is avalanche duration;
N yc transmitting a varying telemetry number for the avalanche duration;
in the step (1), the ratio of the telemetry avalanche density to the telemetry avalanche density is:
wherein N is yc Transmitting a varying telemetry number for the avalanche duration;
N yx transmitting the number of remote signaling shifts in the avalanche duration time;
wherein lambda is yc Is a telemetry avalanche performance impact factor;
λ yx the avalanche performance impact factor is a remote signaling;
gamma is the remote signaling and remote sensing avalanche performance influence factor ratio; lambda (lambda) yc (σ x )、λ yx (σ x ) As to avalanche density sigma x Is a statistical value of (2);
in step (2), the integrated avalanche density is:
σ＝σ yx +γ*σ yc ＝σ yx +α*γ*σ yx (6)
wherein σ is the integrated avalanche density;
alpha is the ratio of the telemetry number to the telemetry number in the tested transformer substation;
gamma is the remote signaling and remote sensing avalanche performance influence factor ratio;
σ yc for telemetry of avalanche density;
σ yx avalanche density for telemetry;
in the step (2), the performance grade of the substation monitoring system is divided into four grades: beta=1, beta=2, beta=3, beta=4;
wherein beta is the performance grade of the substation monitoring system; when sigma (lost) is avalanche test, increasing the remote signaling avalanche density and the remote signaling avalanche density step by step according to the proportion, and measuring the minimum comprehensive avalanche density of the problem of the remote signaling loss or the avalanche test examination item; a. b, c are avalanche performance level cut point values.
2. The method for evaluating the performance of the transformer substation monitoring system based on the avalanche test according to claim 1 is characterized in that: the remote signaling avalanche simulation is to set a remote signaling signal, and from sending one remote signaling shift every few seconds to thousands of remote signaling shifts every second, different grades of remote signaling avalanche simulation are realized;
the telemetry avalanche simulation is realized by sending one change telemetry from a few seconds to hundreds of thousands of change telemetry per second in a telemetry counting mode, and different grades of telemetry avalanche simulation are realized.
3. The method for evaluating the performance of the transformer substation monitoring system based on the avalanche test according to claim 1 is characterized in that: for the same voltage class substation monitoring system:
a＜b＜c (8)；
for different voltage class substation monitoring systems, the avalanche performance class demarcation point values a, b and c are different, each increasing with increasing voltage class.
4. The method for evaluating the performance of the transformer substation monitoring system based on the avalanche test according to claim 1 is characterized in that: the avalanche test inspection item includes the following:
(1) Checking whether a report missing, a false report avalanche test remote signaling or a remote measuring signal exists in a simulation scheduling master station system and a monitoring background;
(2) During the avalanche simulation process, remote control operation is carried out in a monitoring background, whether a corresponding device acts correctly or not is checked, and whether a simulation scheduling master station reacts correctly or not is checked;
(3) During the avalanche simulation process, actual telemetering refreshing is carried out, and whether the monitoring background and the simulation scheduling master station react correctly or not is checked;
(4) During the avalanche simulation process, performing actual protection action, and checking whether the monitoring background and the simulation scheduling master station react correctly;
(5) During the avalanche simulation process, actual calling protection fixed value is carried out, and whether the function is normal is checked;
(6) During the avalanche simulation process, performing actual linkage verification, and checking whether the function is normal;
(7) During the avalanche simulation, whether the CPU load rate, the network load rate, the memory occupancy rate and the system response time of the station layer equipment are normal or not is checked.
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