CN111723481A - Relay protection equipment simulation verification method and device and readable storage medium - Google Patents
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Abstract
The invention discloses a simulation verification method, a simulation verification device and a readable storage medium for relay protection equipment, wherein the method comprises the following steps: performing switching operation of a preset protection pressure plate based on a pre-constructed power system protection device model; after the protection pressing plate is put on or off, inputting preset secondary voltage and current into the protection device model; and verifying the protection device of the power system based on the action condition of the protection device model. The method is based on a pre-constructed power system protection device model to carry out the operation of switching on and off a preset protection pressure plate; the action condition based on the protection device model is used for verifying the protection device of the power system, so that the simulation communication, data acquisition and processing and logic verification of the relay protection device on a power plant, a transformer substation and a power distribution network are realized, and the improvement of the business quality of professionals is facilitated.
Description
Technical Field
The invention relates to the technical field of relay protection of power systems, in particular to a simulation verification method and device of relay protection equipment and a readable storage medium.
Background
With the rapid development of economic construction in China, the scale of the power grid is continuously enlarged. The high-capacity unit is connected to the power generation, the high-voltage grade transformer substation with advanced automation equipment is put into operation, and the power grid structure is changed greatly. In order to ensure safe and stable operation of a power grid, relay protection personnel are required to have higher professional technical level, and how to utilize the existing technology and equipment to quickly improve the business quality of the professional personnel is a current urgent necessity.
Disclosure of Invention
In view of the above defects in the prior art, an object of the present invention is to provide a simulation verification method, device and readable storage medium for relay protection devices, which are used for performing analog communication, data acquisition and processing, and logic verification on relay protection devices in power plants, substations and power distribution networks.
One of the purposes of the present invention is realized by such a technical solution, a relay protection device simulation verification method, including the following steps:
performing switching operation of a preset protection pressure plate based on a pre-constructed power system protection device model;
after the protection pressing plate is put on or off, inputting preset secondary voltage and current into the protection device model;
and verifying the protection device of the power system based on the action condition of the protection device model.
Optionally, before the pre-established electric power system protection device model is used for performing the operation of switching on and off the preset protection pressing plate, the method further includes:
and configuring the power system protection device model according to the setting fixed value of the power system relay protection equipment.
Optionally, the operation of switching on and off of the preset protection pressing plate is performed based on a pre-constructed power system protection device model, including:
and performing corresponding operation of switching on and off of the protection pressing plate based on the bus protection, the transformer protection and the line protection of the power system.
Optionally, after inputting the preset secondary voltage and current into the protection device model, the method further includes:
sampling the secondary voltage current through the protection device model to obtain a sampling parameter.
Optionally, verifying the protection device of the power system based on the action condition of the protection device model includes:
determining a system loop parameter based on the sampling parameter;
and logically checking the input protection pressure plate and the enabled protection type according to the system loop parameters.
Optionally, determining a system loop parameter based on the sampling parameter includes:
determining short circuit current, short circuit impedance, zero sequence current and zero sequence voltage based on the sampling parameters.
Optionally, performing logic verification on the inputted protection pressure plate and the activated protection type according to the system loop parameter includes:
and judging whether protection action logic is met or not according to the system loop parameters, the input protection pressing plate and the protection control words.
Optionally, after the power system protection device is verified based on the action condition of the protection device model, the method further includes:
and displaying the verification result through a chart.
The second purpose of the invention is realized by the technical scheme, and the simulation calibration device of the relay protection equipment comprises:
the switching module is used for switching the preset protection pressing plate on or off based on a pre-constructed power system protection device model;
the input module is used for inputting preset secondary voltage and current into the protection device model after the protection pressing plate is put on or off;
and the verification module is used for verifying the power system protection device based on the action condition of the protection device model.
The third object of the present invention is achieved by the technical solution, which is a computer-readable storage medium, wherein an implementation program for information transmission is stored on the computer-readable storage medium, and when the program is executed by a processor, the steps of the simulation verification method for relay protection equipment as described above are implemented.
Due to the adoption of the technical scheme, the invention has the following advantages: the method is based on a pre-constructed power system protection device model to carry out the operation of switching on and off a preset protection pressure plate; the action condition based on the protection device model is used for verifying the protection device of the power system, so that the simulation communication, data acquisition and processing and logic verification of the relay protection device on a power plant, a transformer substation and a power distribution network are realized, and the improvement of the business quality of professionals is facilitated.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The drawings of the invention are illustrated as follows:
FIG. 1 is a flow chart of a first embodiment of the present invention;
FIG. 2 is a flow chart of a second embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
Example one
A first embodiment of the present invention provides a simulation verification method for relay protection equipment, as shown in fig. 1, including the following steps:
s10, performing switching operation of a preset protection pressure plate based on a pre-constructed power system protection device model;
s20, after the protection pressing plate is put on or off, inputting preset secondary voltage and current into the protection device model;
and S30, verifying the power system protection device based on the action condition of the protection device model.
Specifically, in this embodiment, the same manner as the setting of the relay protection device is configured, and the setting process, the automatic calibration process of the setting value, and the logical operation process of the relay protection device according to the setting process of the relay protection device, such as a substation, a power plant, and a power distribution network, may be performed.
In this embodiment, before the pre-established electric power system protection device model is used for performing the operation of putting on or off the preset protection pressing plate, the method further includes:
and configuring the power system protection device model according to the setting fixed value of the power system relay protection equipment.
After configuration is completed, the relay protection equipment is subjected to operation of setting on and off of a pressing plate, the simulation secondary A, B, C three-phase current and three-phase voltage are input into the protection device model, and finally logic verification of the protection device is performed.
The method is based on a pre-constructed power system protection device model to carry out the operation of switching on and off a preset protection pressure plate; the action condition based on the protection device model is used for verifying the protection device of the power system, so that the simulation communication, data acquisition and processing and logic verification of the relay protection device on a power plant, a transformer substation and a power distribution network are realized, and the improvement of the business quality of professionals is facilitated.
Optionally, the operation of switching on and off of the preset protection pressing plate is performed based on a pre-constructed power system protection device model, including:
and performing corresponding operation of switching on and off of the protection pressing plate based on the bus protection, the transformer protection and the line protection of the power system.
Specifically, in the specific implementation process, different logic algorithms can be executed by researching the response of the protection device to the switching on and off of various pressing plates by adopting a method of simulating switching on and off according to different characteristics of various protections (bus protection, transformer protection and line protection), hard pressing plates such as protection outlets and the like, device logic soft pressing plates and the like.
After the protection pressing plate is put on or off, preset secondary voltage and current are input into the protection device model, in the implementation process, secondary A, B, C three-phase current and three-phase voltage are simulated to be sampled, and when secondary current and voltage are added to the protection device in a simulation mode, accurate sampling of the current magnitude of the relay protection device can be observed.
Optionally, after inputting the preset secondary voltage and current into the protection device model, the method further includes:
sampling the secondary voltage current through the protection device model to obtain a sampling parameter.
Optionally, verifying the protection device of the power system based on the action condition of the protection device model includes:
determining a system loop parameter based on the sampling parameter;
and logically checking the input protection pressure plate and the enabled protection type according to the system loop parameters.
Optionally, determining a system loop parameter based on the sampling parameter includes:
determining short circuit current, short circuit impedance, zero sequence current and zero sequence voltage based on the sampling parameters.
Specifically, in this embodiment, data acquisition and analysis calculation are performed on three-phase current and three-phase voltage added in simulation, then impedance, zero-sequence current and voltage of each loop are calculated, and logic check is performed on an input pressure plate and enabled protection to determine whether protection action logic is satisfied.
Optionally, performing logic verification on the inputted protection pressure plate and the activated protection type according to the system loop parameter includes:
and judging whether protection action logic is met or not according to the system loop parameters, the input protection pressing plate and the protection control words.
Specifically, logic check can be performed according to the input pressure plate state and the protection control word, and whether protection action logic is met or not can be calculated.
Optionally, after the power system protection device is verified based on the action condition of the protection device model, the method further includes:
and displaying the verification result through a chart.
Specifically, in this embodiment, a plot, a histogram, a power spectrum, a bar graph, an error map, a scatter plot, or the like can be generated for the test result by Matplotlib.
Example two
A second embodiment of the present invention provides an implementation case of a simulation verification method for a relay protection device, as shown in fig. 2:
configuring the power system protection device model according to the setting fixed value of the power system relay protection equipment;
specifically, simulating a communication process between the relay protection device and the display interface, and writing in a new ui2py.
@echooff
@cd/d"％～dp0"
pyuic4％1>％～n1.py
And dragging the ui file into batch processing to generate a directory in which the ui file is located, wherein the file name is py _ name.
S10, performing switching operation of a preset protection pressure plate based on a pre-constructed power system protection device model;
s20, after the protection pressing plate is put on or off, inputting preset secondary voltage and current into the protection device model;
the analog currents Ia, Ib, Ic and Ua, Ub, Uc are input, can be displayed in real time in a display interface, and whether TV disconnection or TA disconnection and the like are detected through analysis.
S30, verifying the power system protection device based on the action condition of the protection device model;
specifically, according to the input analog currents Ia, Ib and Ic and Ua, Ub and Uc, short-circuit current, short-circuit impedance, zero-sequence current and zero-sequence voltage are calculated, and then logic check is carried out on the input pressure plate state and the protection control word, so that whether protection action logic is met or not is calculated.
The specific method for visually displaying the test result after the verification is finished is as follows:
by Matplotlib, a plot, a histogram, a power spectrum, a bar graph, an error map, a scatter plot, etc. can be generated for the test results.
In conclusion, the main functions simulated by the method are constant value setting calculation of the protection device, pressing plate switching, logic verification, liquid crystal display, keyboard operation and the like. By analyzing the system function, a PYQT graphical interface, python logic codes and a Windows API are realized. The method is independent of a real system, can be used for simulation exercise at any time, and a simulation training system does not need to know the specific implementation of the system. The method adopts data analysis and processing of big data, visualization display of matploitlib and database application, and has strong universality and maintainability. The relay protection device on a power plant, a transformer substation and a power distribution network can be subjected to analog communication, data acquisition and processing, logic verification and visual display.
EXAMPLE III
A third embodiment of the present invention provides a simulation calibration apparatus for relay protection devices, including:
the switching module is used for switching the preset protection pressing plate on or off based on a pre-constructed power system protection device model;
the input module is used for inputting preset secondary voltage and current into the protection device model after the protection pressing plate is put on or off;
and the verification module is used for verifying the power system protection device based on the action condition of the protection device model.
Example four
A fourth embodiment of the present invention provides a computer-readable storage medium, where an implementation program for information transmission is stored on the computer-readable storage medium, and when the program is executed by a processor, the method implements the steps of the simulation verification method for relay protection equipment as described above.
Specifically, in one embodiment, the processor calls a program in a computer-readable storage medium, and performs the operation of switching on and off the preset protection pressure plate based on a pre-constructed power system protection device model;
after the protection pressing plate is put on or off, inputting preset secondary voltage and current into the protection device model;
and verifying the protection device of the power system based on the action condition of the protection device model.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered thereby.
Claims (10)
1. A simulation verification method for relay protection equipment is characterized by comprising the following steps:
performing switching operation of a preset protection pressure plate based on a pre-constructed power system protection device model;
after the protection pressing plate is put on or off, inputting preset secondary voltage and current into the protection device model;
and verifying the protection device of the power system based on the action condition of the protection device model.
2. The relay protection device simulation verification method according to claim 1, wherein before performing the operation of turning on and off the preset protection pressing plate based on the pre-constructed power system protection device model, the method further comprises:
and configuring the power system protection device model according to the setting fixed value of the power system relay protection equipment.
3. The relay protection device simulation verification method according to claim 1, wherein performing the operation of switching on and off the preset protection pressing plate based on a pre-constructed power system protection device model comprises:
and performing corresponding operation of switching on and off of the protection pressing plate based on the bus protection, the transformer protection and the line protection of the power system.
4. The relay protection device simulation verification method according to any one of claim 1, wherein after inputting a preset secondary voltage and current into the protection device model, the method further comprises:
sampling the secondary voltage current through the protection device model to obtain a sampling parameter.
5. The relay protection device simulation verification method of claim 4, wherein verifying the power system protection device based on the action condition of the protection device model comprises:
determining a system loop parameter based on the sampling parameter;
and logically checking the input protection pressure plate and the enabled protection type according to the system loop parameters.
6. The relay protection device simulation verification method of claim 5, wherein determining system loop parameters based on the sampling parameters comprises:
determining short circuit current, short circuit impedance, zero sequence current and zero sequence voltage based on the sampling parameters.
7. The relay protection device simulation verification method according to claim 5, wherein performing logic verification on the inputted protection pressure plate and the activated protection type according to the system loop parameters comprises:
and judging whether protection action logic is met or not according to the system loop parameters, the input protection pressing plate and the protection control words.
8. The relay protection device simulation verification method according to any one of claims 1 to 7, wherein after verifying the power system protection device based on the behavior of the protection device model, the method further includes:
and displaying the verification result through a chart.
9. The utility model provides a relay protection equipment emulation verifying attachment which characterized in that includes:
the switching module is used for switching the preset protection pressing plate on or off based on a pre-constructed power system protection device model;
the input module is used for inputting preset secondary voltage and current into the protection device model after the protection pressing plate is put on or off;
and the verification module is used for verifying the power system protection device based on the action condition of the protection device model.
10. A computer-readable storage medium, wherein the computer-readable storage medium stores thereon a program for implementing information transfer, and when the program is executed by a processor, the program implements the steps of the relay protection device simulation verification method according to any one of claims 1 to 8.
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| RU2810619C1 (en) * | 2023-05-03 | 2023-12-28 | Иосиф Яковлевич Клецель | Method for test diagnostics of relay protection devices |
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| RU2810619C1 (en) * | 2023-05-03 | 2023-12-28 | Иосиф Яковлевич Клецель | Method for test diagnostics of relay protection devices |
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