CN112260213A - Remote online relay protection setting value checking system and method - Google Patents
Remote online relay protection setting value checking system and method Download PDFInfo
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- CN112260213A CN112260213A CN202011209363.8A CN202011209363A CN112260213A CN 112260213 A CN112260213 A CN 112260213A CN 202011209363 A CN202011209363 A CN 202011209363A CN 112260213 A CN112260213 A CN 112260213A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
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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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Abstract
The invention relates to a remote online relay protection setting value checking system and a method, which are characterized by comprising the following steps: the graphic modeling module is used for establishing a power grid model to be tested according to the structure of the actual power grid to be tested by adopting a visualization method; the data acquisition module is used for acquiring real-time operation parameters of the power grid to be detected and the closing states of all switches, and automatically monitoring the operation state of the power grid to be detected; the fault analysis and calculation module is used for carrying out real-time fault simulation and early warning on the power grid model to be detected in the current operation state on the basis of the acquired real-time operation parameters by adopting a short-circuit current calculation method to obtain parameters of the power grid to be detected; the protection setting checking module is used for checking whether the protection setting value of the relay protection equipment of the power grid model to be tested is reasonable according to the running state and the fault analysis calculation result of the power grid to be tested, and correcting the unreasonable protection setting value in a remote online setting mode.
Description
Technical Field
The invention relates to a remote online relay protection setting value checking system and method, and belongs to the field of offshore oilfield power grid operation control.
Background
In recent years, in order to realize the shared standby of the main power station of the oil field and improve the power supply reliability, China constructs a plurality of offshore multi-platform interconnected power systems, but with the complexity of an offshore multi-platform interconnected power grid structure, the operation state is flexible and changeable, the power grid structure is weak, power faults are easily induced, the protection of each area is not coordinated enough, and the damage such as protection misoperation is easily caused. Whether the relay protection setting work of the offshore power system is carried out scientifically and reasonably plays an important role in safe and reliable operation and operation production of the offshore power grid.
However, the fixed value checking system in the prior art is mainly applied to a large land power grid, and a fixed value checking system which can be applied to an offshore oilfield group power grid does not exist, and the fixed value checking system in the prior art cannot be applied to the offshore oilfield group power grid because the offshore oilfield group power grid changes more frequently than the large land power grid and has higher stability requirements.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a remote online relay protection setting value calibration system and method capable of improving the operation reliability of offshore oilfield group power grids.
In order to achieve the purpose, the invention adopts the following technical scheme: a remote online relay protection setting value checking system comprises:
the graphic modeling module is used for establishing a power grid model to be tested according to the structure of the actual power grid to be tested by adopting a visualization method;
the data acquisition module is used for acquiring real-time operation parameters of the power grid to be detected and the closing states of all switches, mapping the real-time operation parameters into corresponding equipment of the power grid model to be detected for real-time analysis, and automatically monitoring the operation state of the power grid to be detected;
the fault analysis and calculation module is used for carrying out real-time fault simulation and early warning on the power grid model to be detected in the current operation state on the basis of the acquired real-time operation parameters by adopting a short-circuit current calculation method to obtain a fault analysis result of the power grid to be detected;
and the protection setting checking module is used for checking whether the protection setting value of the relay protection equipment of the power grid model to be detected is reasonable or not according to the running state of the power grid to be detected and the fault analysis calculation result, and correcting the unreasonable protection setting value in a remote online setting mode.
Further, the graphical modeling module comprises:
the visualized single line diagram building module is used for building a visualized single line diagram model of the power grid to be tested according to the structure of the actual power grid to be tested by adopting a visualized method;
and the power grid model determining module is used for inputting the performance parameters and setting the protection setting value of the relay protection equipment in the established visual single line diagram model, determining the power grid model to be tested, and displaying each attribute and the running state of the power grid to be tested in a graphic mode.
Further, the data acquisition module comprises:
the operation parameter acquisition module is used for acquiring real-time operation parameters of the power grid to be detected and closing states of all switches of the power grid to be detected from an EMS system of the power grid to be detected;
the mapping module is used for mapping the acquired real-time operation parameters and the closing states of all switches of the power grid to be tested to corresponding equipment of the power grid model to be tested through the data labels;
and the load flow calculation module is used for carrying out load flow calculation on the mapped power grid model to be measured to obtain the running state of the power grid to be measured.
Further, the protection setting checking module comprises:
the view generation module is used for selecting single equipment or a group of equipment for setting relay protection in the power grid model to be tested to generate a STAR view;
the simulation fault insertion module is used for inserting fault conditions at any position in the power grid model to be tested;
the checking module is used for checking whether the protection setting value of the relay protection equipment is reasonable or not according to the equipment damage curve and the equipment operation curve of the relay protection equipment after the simulated fault condition is inserted;
and the remote online setting module is used for remotely adjusting the TCC curve of the unreasonable relay protection equipment online and correcting the protection setting value of the unreasonable relay protection equipment to obtain a reasonable protection setting value.
Further, the starting criterion condition of the protection setting checking module is switch deflection and line current change of the power grid to be tested.
A remote online relay protection fixed value checking method comprises the following steps:
1) the graphic modeling module adopts a visualization method to establish a power grid model to be tested according to the structure of the actual power grid to be tested;
2) the data acquisition module acquires real-time operation parameters of the power grid to be tested, maps the real-time operation parameters to corresponding equipment of the power grid model to be tested for real-time analysis, and automatically monitors the operation state of the power grid to be tested;
3) when the data acquisition module monitors that the running state of the power grid to be tested changes, signals are sent to the fault analysis calculation module and the protection setting check module, and the fault analysis calculation module 13 and the protection setting check module are automatically started;
4) the fault analysis and calculation module carries out real-time fault simulation and early warning on the to-be-detected power grid model in the current operation state on the basis of the acquired real-time operation parameters by adopting a short-circuit current calculation method to obtain a fault analysis result of the to-be-detected power grid;
5) and the protection setting checking module checks whether the protection setting value of the relay protection equipment of the power grid model to be tested is reasonable according to the fault analysis calculation result, corrects the unreasonable protection setting value of the relay protection equipment by adopting a remote online setting mode, and finishes checking the protection setting value of the relay protection equipment of the power grid to be tested.
Further, the specific process of the step 1) is as follows:
1.1) the visualized single line diagram building module adopts a visualization method to build a visualized single line diagram model of the power grid to be tested according to the structure of the actual power grid to be tested;
1.2) the power grid model determining module inputs performance parameters and sets a protection setting value of the relay protection device in the established visual single line diagram model, determines the power grid model to be tested, and displays each attribute and operation state of the power grid to be tested in a graphic mode.
Further, the specific process of step 2) is as follows:
2.1) the operation parameter acquisition module acquires real-time operation parameters of the power grid to be detected and closing states of all switches of the power grid to be detected from an EMS system of the power grid to be detected;
2.2) the mapping module maps the acquired real-time operation parameters and the closing states of all switches of the power grid to be detected to corresponding equipment of the power grid model to be detected through data labels, wherein each equipment of the power grid model to be detected is provided with a corresponding label;
and 2.3) carrying out load flow calculation on the mapped power grid model to be measured by the load flow calculation module to obtain the running state of the power grid to be measured.
Further, the starting criterion condition of the protection setting checking module in the step 3) is switch deflection and line current change of the power grid to be tested.
Further, the specific process of step 5) is as follows:
5.1) selecting a single device or a group of devices with relay protection in the power grid model to be tested by a view generation module to generate a STAR view;
5.2) the simulation fault insertion module is used for inserting fault conditions at any position in the power grid model to be tested;
5.3) after the simulation fault condition is inserted, the checking module checks whether the protection setting value of the relay protection equipment is reasonable or not by judging whether the TCC curve of the relay protection equipment is positioned on the left lower side of the equipment damage curve of the relay protection equipment and the right upper side of the equipment operation curve of the relay protection equipment at the same time or not;
and 5.4) remotely adjusting the TCC curve of the unreasonable relay protection equipment on line by a remote online setting module, and correcting the protection setting value of the unreasonable relay protection equipment to obtain a reasonable protection setting value.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. in order to better improve the safety and stability of the offshore multi-platform interconnected power system, the invention can judge all the protected performance parameters in the power grid to be tested in real time, carry out real-time check on the protection performance of the power grid to be tested in the current operating state, judge whether the protection performance of the relay protection equipment meets the requirements in time and carry out remote online setting, can effectively prevent large-area power failure accidents caused by protection misoperation and improve the operating reliability of the power system.
2. The invention can effectively monitor and manage the running state and parameter setting of the power grid to be tested due to the real-time fault analysis module and the protection setting and checking module, correct the unreasonable relay protection setting value of the relay protection equipment of the power grid to be tested in different running states in real time, ensure that the offshore multi-platform interconnected power system runs more safely and stably, provide support for the offshore power grid intellectualization and can be widely applied to the field of offshore oilfield group power grid running control.
Drawings
FIG. 1 is a schematic diagram of a configuration of a checking system of the present invention;
FIG. 2 is a flow chart of a verification method of the present invention;
FIG. 3 is a schematic diagram of a TCC curve for a STAR view in an embodiment of the present invention, where the abscissa is the current value (kA) and the ordinate is the time(s).
Detailed Description
The present invention is described in detail below with reference to the attached drawings. It is to be understood, however, that the drawings are provided solely for the purposes of promoting an understanding of the invention and that they are not to be construed as limiting the invention.
Example one
As shown in fig. 1, the present embodiment provides a remote online relay protection constant value checking system, which includes a real-time fault analysis module 1 and a protection setting checking module 2, where the real-time fault analysis module 1 includes a graphical modeling module 11, a data acquisition module 12, and a fault analysis and calculation module 13.
The graphic modeling module 11 is configured to establish a model of the power grid to be tested according to the structure of the actual power grid to be tested by using a visualization method, and display various attributes and operating states of the power grid to be tested in a graphic manner, where the various attributes of the power grid to be tested include electrical operating parameter attributes such as voltage, current, and power of all devices in the power grid to be tested, and the operating state of the power grid to be tested is a working state of all switching devices in the power grid to be tested.
The data obtaining module 12 is configured to obtain real-time operation parameters of the power grid to be detected and closing states of all switches from an EMS System (Energy Management System) of the power grid to be detected, map the real-time operation parameters to corresponding devices of the power grid model to be detected for real-time analysis, and automatically monitor the operation state of the power grid to be detected, where the real-time operation parameters of the power grid to be detected include voltage, current, active power, reactive power, frequency, power factor, and the like, and a time interval for obtaining the parameters may be freely set according to specific situations.
The fault analysis and calculation module 13 is configured to perform real-time fault simulation and early warning on the to-be-detected power grid model in the current operating state based on the acquired real-time operating parameters by using a short-circuit current calculation method, simulate the conditions of the to-be-detected power grid under various fault conditions, and obtain a fault analysis result of the to-be-detected power grid, that is, power grid fault state parameters such as equivalent impedance of each bus, each branch coefficient, and short-circuit current, wherein the fault conditions include various types such as a single-phase short circuit, a two-phase ground fault, and a three-phase short-circuit fault, and the short-circuit current calculation method considering the.
The protection setting checking module 2 is used for checking whether the protection setting value of the relay protection equipment of the power grid model to be tested is reasonable according to the running state of the power grid to be tested and the fault analysis calculation result, and correcting the unreasonable protection setting value in a remote online setting mode.
In a preferred embodiment, the graphical modeling module 11 includes a visualization single line diagram construction module and a grid model determination module.
The visualized single line diagram building module is used for building a visualized single line diagram model of the power grid to be tested according to the structure of the actual power grid to be tested by adopting a visualized method.
The power grid model determining module is used for inputting performance parameters and setting protection setting values of the relay protection equipment in the established visual single line diagram model, determining a power grid model to be tested, and displaying various attributes and running states of the power grid to be tested in a graphic mode, wherein the performance parameters comprise basic parameters which can represent the performance of the equipment in the power grid to be tested, such as rated voltage, rated current, rated impedance and the like.
In a preferred embodiment, the data acquisition module 12 includes an operation parameter acquisition module, a mapping module and a power flow calculation module.
The operation parameter acquisition module is used for acquiring real-time operation parameters of the power grid to be detected and closing states of all switches of the power grid to be detected from an EMS system of the power grid to be detected.
The mapping module is used for mapping the acquired real-time operation parameters and the closing states of all switches of the power grid to be tested to corresponding equipment (including the switches) of the power grid model to be tested through the data labels.
And the load flow calculation module is used for carrying out load flow calculation on the mapped power grid model to be measured to obtain the running state of the power grid to be measured so as to ensure that the established power grid model to be measured is consistent with the actual power grid to be measured.
In a preferred embodiment, the protection setting checking module 2 comprises a view generating module 21, a simulated fault inserting module 22, a checking module 23 and a remote online setting module 24.
The view generation module 21 is configured to select a single device or a group of devices for setting relay protection in the power grid model to be tested to generate a STAR view (relay protection module cooperation view).
The simulated fault insertion module 22 is used for inserting a simulated fault condition at any position in the power grid model to be tested.
The checking module 23 is configured to check whether the protection setting value of the relay protection device is reasonable according to a device damage curve and a device operation curve of the relay protection device after the simulated fault condition is inserted, where the device damage curve is possessed by the relay protection device itself, and the device operation curve is obtained by monitoring a current change with time in an operation process of the relay protection device.
The remote online setting module 24 is configured to remotely adjust a TCC curve of the unreasonable relay protection device online, and correct the protection setting value of the unreasonable relay protection device, that is, move the TCC curve to make the TCC curve be located on both the left lower side of the device damage curve and the right upper side of the device operation curve, so as to obtain a reasonable protection setting value, where the reasonable relay protection device is a TCC curve of the relay protection device that is located on both the left lower side of the device damage curve and the right upper side of the device operation curve, and the unreasonable relay protection device is a TCC curve of the relay protection device that is not located on both the left lower side of the device damage curve and the right upper side of the device operation.
In a preferred embodiment, the starting criterion condition of the protection setting checking module 2 is the switch deflection and the line current change of the power grid to be tested.
Example two
As shown in fig. 2, the present embodiment provides a remote online relay protection setting value checking method, including the following steps:
1) the graphic modeling module 11 adopts a visualization method to establish a model of the power grid to be tested according to the structure of the actual power grid to be tested, and displays various attributes and operation states of the power grid to be tested in a graphic manner, specifically:
1.1) the visualized single line diagram building module adopts a visualization method to build a visualized single line diagram model of the power grid to be tested according to the structure of the actual power grid to be tested.
1.2) the power grid model determining module inputs performance parameters and sets a protection setting value of the relay protection device in the established visual single line diagram model, determines the power grid model to be tested, and displays each attribute and operation state of the power grid to be tested in a graphic mode.
2) The data obtaining module 12 obtains real-time operation parameters of the power grid to be tested and the closing states of all switches from the EMS system of the power grid to be tested, maps the real-time operation parameters to corresponding devices of the power grid model to be tested for real-time analysis, and automatically monitors the operation state of the power grid to be tested, specifically:
2.1) the operation parameter obtaining module obtains the real-time operation parameters of the power grid to be tested and the closing states of all switches of the power grid to be tested from the EMS system of the power grid to be tested.
2.2) the mapping module maps the obtained real-time operation parameters and the closing states of all switches of the power grid to be tested to corresponding devices of the power grid model to be tested through an OPC (OLE for Process Control) interface through data tags, wherein each device of the power grid model to be tested is provided with a corresponding tag.
And 2.3) carrying out load flow calculation on the mapped power grid model to be measured by the load flow calculation module to obtain the running state of the power grid to be measured.
3) When the data acquisition module 12 monitors that the operation state of the power grid to be tested changes, a signal is sent to the fault analysis calculation module 13 and the protection setting check module 2, the fault analysis calculation module 13 and the protection setting check module 2 are automatically started, wherein the starting criterion conditions of the protection setting check module 2 are switch deflection and line current change of the power grid to be tested:
if the switch of the power grid to be tested is displaced and the line current changes, the setting of the protection setting value of the relay protection equipment in the power grid to be tested is influenced, on one hand, the operation of the unit, the main transformer and other equipment of the power grid to be tested is switched on and off, or the operation state of the power grid to be tested is directly influenced due to the tripping caused by faults, and the reasons are mainly reflected in the change of the opening and closing states of the switch and the disconnecting link; on the other hand, the changes of the load of the power grid to be measured and the tidal current of the unit and the like also have great influence on the protection setting value of the relay protection equipment. Therefore, the criterion conditions for starting the protection setting check module 2 are switch deflection and line current change.
4) The fault analysis and calculation module 13 performs real-time fault simulation and early warning on the to-be-detected power grid model in the current operation state based on the acquired real-time operation parameters by using a short circuit calculation method, simulates the condition of the to-be-detected power grid under various fault conditions, and obtains a fault analysis result of the to-be-detected power grid, namely, power grid fault state parameters such as bus equivalent impedance, branch coefficients and short circuit current of the power system, and specifically includes:
4.1) the fault analysis and calculation module 13 performs real-time fault simulation on the to-be-detected power grid model in the current operation state based on the acquired real-time operation parameters, simulates the conditions of the to-be-detected power grid under various fault conditions, and obtains performance parameters such as bus equivalent impedance, branch coefficients and short-circuit current of the to-be-detected power grid, wherein the short-circuit calculation method is a method disclosed in the prior art, and the specific process is not repeated here.
4.2) if the electrical parameters of the power grid model to be detected, such as voltage, current and the like, exceed the preset reasonable values after short circuit calculation, early warning is carried out.
5) The protection setting checking module 2 checks whether the protection setting value of the relay protection equipment of the power grid model to be tested is reasonable according to the fault analysis calculation result, corrects the unreasonable protection setting value of the relay protection equipment by adopting a remote online setting mode, and completes checking of the protection setting value of the relay protection equipment of the power grid to be tested, and the method specifically comprises the following steps:
5.1) the view generation module 21 selects a single device or a group of devices for setting relay protection in the power grid model to be tested to generate a STAR view so as to apply a TCC curve in the STAR view to carry out protection coordination on the selected relay protection devices.
5.2) the simulation fault insertion module 22 is used for inserting fault conditions at any position in the power grid model to be tested.
5.3) the checking module 23 checks whether the protection setting value of the relay protection device is reasonable by judging whether the TCC curve of the relay protection device is simultaneously positioned at the left lower part of the device damage curve of the relay protection device and the right upper part of the device operation curve of the relay protection device after inserting the simulated fault condition, as shown in fig. 3, the TCC curve of the transformer protection device is positioned at the left lower part of the transformer damage curve.
And 5.4) the remote online setting module 24 remotely adjusts the TCC curve of the unreasonable relay protection equipment on line (namely, the TCC curve of the relay protection equipment is not positioned at the left lower part of the equipment damage curve of the relay protection equipment and at the right upper part of the equipment operation curve of the relay protection equipment at the same time), and corrects the unreasonable protection setting value of the relay protection equipment to obtain a reasonable protection setting value.
The above embodiments are only used for illustrating the present invention, and the structure, connection mode, manufacturing process, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.
Claims (10)
1. The utility model provides a long-range online relay protection definite value check system which characterized in that includes:
the graphic modeling module is used for establishing a power grid model to be tested according to the structure of the actual power grid to be tested by adopting a visualization method;
the data acquisition module is used for acquiring real-time operation parameters of the power grid to be detected and the closing states of all switches, mapping the real-time operation parameters into corresponding equipment of the power grid model to be detected for real-time analysis, and automatically monitoring the operation state of the power grid to be detected;
the fault analysis and calculation module is used for carrying out real-time fault simulation and early warning on the power grid model to be detected in the current operation state on the basis of the acquired real-time operation parameters by adopting a short-circuit current calculation method to obtain a fault analysis result of the power grid to be detected;
and the protection setting checking module is used for checking whether the protection setting value of the relay protection equipment of the power grid model to be detected is reasonable or not according to the running state of the power grid to be detected and the fault analysis calculation result, and correcting the unreasonable protection setting value in a remote online setting mode.
2. The remote on-line relay protection constant value checking system according to claim 1, wherein the graphic modeling module comprises:
the visualized single line diagram building module is used for building a visualized single line diagram model of the power grid to be tested according to the structure of the actual power grid to be tested by adopting a visualized method;
and the power grid model determining module is used for inputting the performance parameters and setting the protection setting value of the relay protection equipment in the established visual single line diagram model, determining the power grid model to be tested, and displaying each attribute and the running state of the power grid to be tested in a graphic mode.
3. The remote on-line relay protection constant value checking system according to claim 1, wherein the data obtaining module comprises:
the operation parameter acquisition module is used for acquiring real-time operation parameters of the power grid to be detected and closing states of all switches of the power grid to be detected from an EMS system of the power grid to be detected;
the mapping module is used for mapping the acquired real-time operation parameters and the closing states of all switches of the power grid to be tested to corresponding equipment of the power grid model to be tested through the data labels;
and the load flow calculation module is used for carrying out load flow calculation on the mapped power grid model to be measured to obtain the running state of the power grid to be measured.
4. The remote on-line relay protection constant value checking system according to claim 1, wherein the protection setting checking module comprises:
the view generation module is used for selecting single equipment or a group of equipment for setting relay protection in the power grid model to be tested to generate a STAR view;
the simulation fault insertion module is used for inserting fault conditions at any position in the power grid model to be tested;
the checking module is used for checking whether the protection setting value of the relay protection equipment is reasonable or not according to the equipment damage curve and the equipment operation curve of the relay protection equipment after the simulated fault condition is inserted;
and the remote online setting module is used for remotely adjusting the TCC curve of the unreasonable relay protection equipment online and correcting the protection setting value of the unreasonable relay protection equipment to obtain a reasonable protection setting value.
5. The system according to claim 1, wherein the start criterion condition of the protection setting and checking module is a switch shift and a line current change of the power grid to be tested.
6. A remote online relay protection fixed value checking method is characterized by comprising the following steps:
1) the graphic modeling module adopts a visualization method to establish a power grid model to be tested according to the structure of the actual power grid to be tested;
2) the data acquisition module acquires real-time operation parameters of the power grid to be tested, maps the real-time operation parameters to corresponding equipment of the power grid model to be tested for real-time analysis, and automatically monitors the operation state of the power grid to be tested;
3) when the data acquisition module monitors that the running state of the power grid to be tested changes, signals are sent to the fault analysis calculation module and the protection setting check module, and the fault analysis calculation module 13 and the protection setting check module are automatically started;
4) the fault analysis and calculation module carries out real-time fault simulation and early warning on the to-be-detected power grid model in the current operation state on the basis of the acquired real-time operation parameters by adopting a short-circuit current calculation method to obtain a fault analysis result of the to-be-detected power grid;
5) and the protection setting checking module checks whether the protection setting value of the relay protection equipment of the power grid model to be tested is reasonable according to the fault analysis calculation result, corrects the unreasonable protection setting value of the relay protection equipment by adopting a remote online setting mode, and finishes checking the protection setting value of the relay protection equipment of the power grid to be tested.
7. The remote online relay protection fixed value checking method according to claim 6, wherein the specific process of the step 1) is as follows:
1.1) the visualized single line diagram building module adopts a visualization method to build a visualized single line diagram model of the power grid to be tested according to the structure of the actual power grid to be tested;
1.2) the power grid model determining module inputs performance parameters and sets a protection setting value of the relay protection device in the established visual single line diagram model, determines the power grid model to be tested, and displays each attribute and operation state of the power grid to be tested in a graphic mode.
8. The remote online relay protection fixed value checking method according to claim 6, wherein the specific process of the step 2) is as follows:
2.1) the operation parameter acquisition module acquires real-time operation parameters of the power grid to be detected and closing states of all switches of the power grid to be detected from an EMS system of the power grid to be detected;
2.2) the mapping module maps the acquired real-time operation parameters and the closing states of all switches of the power grid to be detected to corresponding equipment of the power grid model to be detected through data labels, wherein each equipment of the power grid model to be detected is provided with a corresponding label;
and 2.3) carrying out load flow calculation on the mapped power grid model to be measured by the load flow calculation module to obtain the running state of the power grid to be measured.
9. The remote on-line relay protection constant value checking method according to claim 6, wherein the starting criterion condition of the protection setting checking module in the step 3) is a switch deflection and a line current change of the power grid to be tested.
10. The remote online relay protection fixed value checking method according to claim 6, wherein the specific process of the step 5) is as follows:
5.1) selecting a single device or a group of devices with relay protection in the power grid model to be tested by a view generation module to generate a STAR view;
5.2) the simulation fault insertion module is used for inserting fault conditions at any position in the power grid model to be tested;
5.3) after the simulation fault condition is inserted, the checking module checks whether the protection setting value of the relay protection equipment is reasonable or not by judging whether the TCC curve of the relay protection equipment is positioned on the left lower side of the equipment damage curve of the relay protection equipment and the right upper side of the equipment operation curve of the relay protection equipment at the same time or not;
and 5.4) remotely adjusting the TCC curve of the unreasonable relay protection equipment on line by a remote online setting module, and correcting the protection setting value of the unreasonable relay protection equipment to obtain a reasonable protection setting value.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113541320A (en) * | 2021-09-17 | 2021-10-22 | 广东电网有限责任公司东莞供电局 | Power grid power failure and restoration visual monitoring method and system and storage medium |
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| CN117458411A (en) * | 2023-12-26 | 2024-01-26 | 四川迪思源科技有限公司 | Distribution network protection self-adaptive system under power system |
| CN117458411B (en) * | 2023-12-26 | 2024-03-12 | 四川迪思源科技有限公司 | Distribution network protection self-adaptive system under power system |
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