CN112886713A - Power grid emergency control method based on shore-based power supply offshore oil field group - Google Patents
Power grid emergency control method based on shore-based power supply offshore oil field group Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 claims abstract description 43
- 238000004458 analytical method Methods 0.000 claims abstract description 6
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- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/248—UPS systems or standby or emergency generators
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to the technical field of electric power, in particular to a shore-based power supply offshore oilfield group-based power grid emergency control method, which comprises the following steps of: s1, monitoring the operation condition of the power grid in real time by using a monitoring module when the power grid system of the oil field group operates; s2, collecting the power grid operation parameters by using the parameter collection module while monitoring the power grid operation condition, and sending the parameters to the fault judgment module; s3, analyzing and processing the collected parameters by using a fault judgment module, and judging whether the power grid runs in fault according to the analysis and processing result; and S4, if the fault judgment module judges that the power grid has no fault, repeating the step S1, and if the fault judgment module judges that the power grid has a fault, starting the shore-based power supply module to emergently supply power to the power grid of the offshore oilfield group, and adjusting the voltage of the power grid of the offshore oilfield group by using the shore-based power supply module until the fault judgment module judges that the power grid has no fault.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a shore-based power supply offshore oil field group-based power grid emergency control method.
Background
An oil field refers to a specific area of crude oil production. Sometimes referred to collectively as the reservoir of oil accumulated in the subsurface of a particular area. Several oil zones are broadly referred to together as an oil field. Such as Daqing oil field, North sea oil field in England, autumn Bright oil field in Russia, etc. Oil fields are naturally occurring hydrocarbons in the subsurface that are liquid at surface conditions. In contrast, it is still a gas at surface conditions, and is natural gas. A particular area of natural gas production is a natural gas field. The size of the recoverable reserves of the oil determines the exploitation value. It is required to accurately calculate the size of the oil-containing area, the number and thickness of oil layers, the oil reserves per unit area, and the like.
The offshore oil field group power grid is an independent micro-grid system which is dispersed on the ocean and consists of distributed power generation, platform transformer substations/loads, sea cables and the like, is an important infrastructure for ocean oil and gas exploitation, and has important effect on ensuring the reliability and efficiency of offshore oil and gas production due to safety and stability. The emergency control is a series of control measures for preventing the system from being damaged or developing to a worse condition and avoiding serious power failure accidents when the system is disturbed to enter an emergency or extreme emergency state, and is an important link for ensuring the safety and stability of the system. The pre-decision of the emergency control means that before disturbance or fault occurs, a control scheme for dealing with various possible disturbances or faults is made, namely a decision table, so that when actual disturbance or fault is detected, control measures are quickly implemented by comparing the decision table, and the safety and stability of the power grid are ensured.
When the power grid of the existing oil field group has an emergency fault, the power grid is difficult to be timely controlled by a shore-based power supply system.
Disclosure of Invention
The invention aims to provide a power grid emergency control method based on a shore-based power supply offshore oilfield group, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a power grid emergency control method based on a shore-based power supply offshore oilfield group comprises the following steps:
s1, monitoring the operation condition of the power grid in real time by using a monitoring module when the power grid system of the oil field group operates;
s2, collecting the power grid operation parameters by using the parameter collection module while monitoring the power grid operation condition, and sending the parameters to the fault judgment module;
s3, analyzing and processing the collected parameters by using a fault judgment module, and judging whether the power grid runs in fault according to the analysis and processing result;
and S4, if the fault judgment module judges that the power grid has no fault, repeating the step S1, and if the fault judgment module judges that the power grid has a fault, starting the shore-based power supply module to emergently supply power to the power grid of the offshore oilfield group, and adjusting the voltage of the power grid of the offshore oilfield group by using the shore-based power supply module until the fault judgment module judges that the power grid has no fault.
As a still further scheme of the invention: in step S4, if the fault determination module determines that the power grid has a fault, the fault determination module starts an alarm module to send an alarm to the relevant personnel to remind the relevant personnel of the power grid of the oilfield group that the power grid has a fault.
As a still further scheme of the invention: in step S4, if the fault determination module determines that the power grid has a fault, the fault determination condition is sent to the remote control terminal through the internet via the network sharing module, so that the relevant personnel can know the power grid fault information of the oilfield group remotely.
As a still further scheme of the invention: the monitoring module is electrically connected with a power grid of the offshore oilfield group and used for collecting working parameters of various devices in the power grid of the offshore oilfield group, and the monitoring module is further in telecommunication connection with the parameter collecting module and used for collecting the obtained working parameters and sending the working parameters to the parameter collecting module.
As a still further scheme of the invention: the parameter collecting module is electrically connected with the fault judging module, the parameter collecting module receives the working parameters sent by the monitoring module and then sends the working parameters to the fault judging module, the fault judging module receives the working parameters and then compares the working parameters with the internal prestored standard value, and the difference value of the comparison result is used as the fault judging basis.
As a still further scheme of the invention: and a standard value pre-storing unit is arranged in the fault judgment module and is used for receiving standard values of various working equipment entering the fault judgment module by pre-storing the standard values by a worker.
As a still further scheme of the invention: the shore-based power supply module is electrically connected with the power grid of the offshore oilfield group and the fault judgment module respectively, and when the fault judgment module judges that the working state of the equipment is a fault, the shore-based power supply module supplies power to the power grid of the offshore oilfield group.
Compared with the prior art, the invention has the beneficial effects that: when the power grid system of the oil field group operates, the monitoring module is used for monitoring the power grid operation condition in real time, if the fault judgment module judges that the power grid has no fault, repeating the step S1, if the fault judging module judges that the power grid has a fault, starting the shore-based power supply module, emergency power supply is carried out on the power grid of the offshore oilfield group, the shore-based power supply module is used for adjusting the voltage of the power grid of the offshore oilfield group until the fault judgment module judges that the power grid has no fault, if the fault judgment module judges that the power grid has a fault, then an alarm module is started to give an alarm to relevant personnel to remind the relevant personnel that the power grid of the oil field group has a fault, if the fault judgment module judges that the power grid has a fault, and the fault judgment condition is sent to the remote control end through the internet through the network sharing module, so that related personnel can conveniently and remotely know the power grid fault information of the oil field group.
Drawings
Fig. 1 is a control module diagram of a power grid emergency control method based on a shore-based power supply offshore oilfield group.
Fig. 2 is a flow chart of a power grid emergency control method based on a shore-based power supply offshore oilfield group.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, an element of the present invention may be said to be "fixed" or "disposed" to another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Example 1
Referring to fig. 1 and 2, in an embodiment of the present invention, a shore-based power supply offshore oilfield group-based power grid emergency control system includes a monitoring module, a parameter collection module, a fault determination module, a shore-based power supply module, and a voltage control module, where the monitoring module is configured to monitor a power grid of an offshore oilfield group in real time, the monitoring module is connected to the parameter collection module, the fault determination module is connected to the parameter collection module and configured to determine whether the power grid of the oilfield group is faulty, the parameter collection module is used to collect and arrange monitored parameters and then send the parameters to the fault determination module, the fault determination module is used to analyze the parameters and determine whether the power grid of the oilfield group is faulty, the shore-based power supply module is connected to the fault determination module, the voltage control module is connected to the shore-based power supply module, and when the power grid is faulty, starting a shore-based power supply module, and adjusting the power grid voltage of the oil field group by using a voltage control module;
in the embodiment of the present invention, it should be noted that the monitoring module is electrically connected to the power grid of the offshore oilfield group and is configured to collect working parameters of each device in the power grid of the offshore oilfield group, and the monitoring module is further connected to the parameter collection module in a telecommunication manner and is configured to send the collected working parameters to the parameter collection module.
In the embodiment of the present invention, it should be noted that the parameter collection module is electrically connected to the fault determination module, the parameter collection module receives the working parameters sent by the monitoring module and sends the working parameters to the fault determination module, the fault determination module receives the working parameters and compares the working parameters with an internal pre-stored standard value, and a difference value of comparison results is used as a fault determination basis.
In the embodiment of the present invention, it should be noted that a standard value pre-storing unit is arranged inside the fault determining module, and is used for receiving a standard value pre-stored by a worker when each device entering the fault determining module works.
In the embodiment of the present invention, it should be noted that the shore-based power supply module is electrically connected to the power grid of the offshore oilfield group and the fault determination module, respectively, and when the fault determination module determines that the operating state of the device is a fault, the shore-based power supply module supplies power to the power grid of the offshore oilfield group.
Example 2
Referring to fig. 1 and 2, in an embodiment of the present invention, a shore-based power supply offshore oilfield group-based power grid emergency control system includes a monitoring module, a parameter collection module, a fault determination module, a network sharing module, a shore-based power supply module, an alarm module, and a voltage control module, wherein the monitoring module is configured to monitor a power grid of an offshore oilfield group in real time, the monitoring module is connected to the parameter collection module, the fault determination module is connected to the parameter collection module and configured to determine whether the power grid of the oilfield group is faulty, the parameter collection module collects and arranges the monitored parameters and sends the parameters to the fault determination module, the fault determination module analyzes the parameters and determines whether the power grid of the oilfield group is faulty, the alarm module is connected to the fault determination module, and the network sharing module is connected to the fault determination module, the shore-based power supply module is connected with the fault judgment module, the voltage control module is connected with the shore-based power supply module, when a power grid fails, the alarm module is used for giving an alarm to related personnel, meanwhile, the network sharing module is used for sending fault information to the remote control end through the internet, the shore-based power supply module is started, and the voltage control module is used for adjusting the power grid voltage of the oil field group until the fault alarm is relieved;
in the embodiment of the present invention, it should be noted that the monitoring module is electrically connected to the power grid of the offshore oilfield group and is configured to collect working parameters of each device in the power grid of the offshore oilfield group, and the monitoring module is further connected to the parameter collection module in a telecommunication manner and is configured to send the collected working parameters to the parameter collection module.
In the embodiment of the present invention, it should be noted that the parameter collection module is electrically connected to the fault determination module, the parameter collection module receives the working parameters sent by the monitoring module and sends the working parameters to the fault determination module, the fault determination module receives the working parameters and compares the working parameters with an internal pre-stored standard value, and a difference value of comparison results is used as a fault determination basis.
In the embodiment of the present invention, it should be noted that a standard value pre-storing unit is arranged inside the fault determining module, and is used for receiving a standard value pre-stored by a worker when each device entering the fault determining module works.
In the embodiment of the present invention, it should be noted that the shore-based power supply module is electrically connected to the power grid of the offshore oilfield group and the fault determination module, respectively, and when the fault determination module determines that the operating state of the device is a fault, the shore-based power supply module supplies power to the power grid of the offshore oilfield group.
Example 3
A power grid emergency control method based on a shore-based power supply offshore oilfield group comprises the following steps:
s1, monitoring the operation condition of the power grid in real time by using a monitoring module when the power grid system of the oil field group operates;
s2, collecting the power grid operation parameters by using the parameter collection module while monitoring the power grid operation condition, and sending the parameters to the fault judgment module;
s3, analyzing and processing the collected parameters by using a fault judgment module, and judging whether the power grid runs in fault according to the analysis and processing result;
and S4, if the fault judgment module judges that the power grid has no fault, repeating the step S1, if the fault judgment module judges that the power grid has a fault, starting a shore-based power supply module to perform emergency power supply on the power grid of the offshore oilfield group, adjusting the power grid voltage of the offshore oilfield group by using the shore-based power supply module until the fault judgment module judges that the power grid has no fault, and if the fault judgment module judges that the power grid has a fault, starting an alarm module to give an alarm to related personnel to remind the related personnel that the power grid of the oilfield group has a fault.
Example 4
A power grid emergency control method based on a shore-based power supply offshore oilfield group comprises the following steps:
s1, monitoring the operation condition of the power grid in real time by using a monitoring module when the power grid system of the oil field group operates;
s2, collecting the power grid operation parameters by using the parameter collection module while monitoring the power grid operation condition, and sending the parameters to the fault judgment module;
s3, analyzing and processing the collected parameters by using a fault judgment module, and judging whether the power grid runs in fault according to the analysis and processing result;
and S4, if the fault judgment module judges that the power grid has no fault, repeating the step S1, if the fault judgment module judges that the power grid has a fault, starting a shore-based power supply module to perform emergency power supply on the power grid of the offshore oilfield group, adjusting the power grid voltage of the offshore oilfield group by using the shore-based power supply module until the fault judgment module judges that the power grid has no fault, and if the fault judgment module judges that the power grid has a fault, starting an alarm module to give an alarm to related personnel to remind the related personnel that the power grid of the oilfield group has a fault.
If the fault judgment module judges that the power grid has faults, the fault judgment condition is sent to the remote control end through the internet through the network sharing module, and related personnel can conveniently know the power grid fault information of the oil field group remotely.
Example 5
A power grid emergency control method based on a shore-based power supply offshore oilfield group comprises the following steps:
s1, monitoring the operation condition of the power grid in real time by using a monitoring module when the power grid system of the oil field group operates;
s2, collecting the power grid operation parameters by using the parameter collection module while monitoring the power grid operation condition, and sending the parameters to the fault judgment module;
s3, analyzing and processing the collected parameters by using a fault judgment module, and judging whether the power grid runs in fault according to the analysis and processing result;
and S4, if the fault judgment module judges that the power grid has no fault, repeating the step S1, if the fault judgment module judges that the power grid has a fault, starting a shore-based power supply module to perform emergency power supply on the power grid of the offshore oilfield group, adjusting the power grid voltage of the offshore oilfield group by using the shore-based power supply module until the fault judgment module judges that the power grid has no fault, and if the fault judgment module judges that the power grid has a fault, starting an alarm module to give an alarm to related personnel to remind the related personnel that the power grid of the oilfield group has a fault.
If the fault judgment module judges that the power grid has faults, the fault judgment condition is sent to the remote control end through the internet through the network sharing module, and related personnel can conveniently know the power grid fault information of the oil field group remotely.
The embodiment of the invention is different from the embodiments 1 to 4 in that:
in the embodiment of the invention, the monitoring module is electrically connected with the power grid of the offshore oilfield group and is used for collecting the working parameters of each device in the power grid of the offshore oilfield group, and the monitoring module is also in telecommunication connection with the parameter collecting module and is used for sending the collected working parameters to the parameter collecting module.
In the embodiment of the invention, the parameter collection module is electrically connected with the fault judgment module, the parameter collection module receives the working parameters sent by the monitoring module and then sends the working parameters to the fault judgment module, the fault judgment module receives the working parameters and then compares the working parameters with the internal prestored standard value, and the difference value of the comparison result is used as the fault judgment basis.
In the embodiment of the invention, a standard value pre-storing unit is arranged inside the fault judgment module and is used for receiving the standard value pre-stored by a worker when each piece of equipment entering the fault judgment module works.
In the embodiment of the invention, the shore-based power supply module is respectively electrically connected with the power grid of the offshore oilfield group and the fault judgment module, and when the fault judgment module judges that the working state of the equipment is a fault, the shore-based power supply module supplies power to the power grid of the offshore oilfield group.
The invention has the beneficial effects that:
when the power grid system of the oil field group operates, the monitoring module is used for monitoring the power grid operation condition in real time, if the fault judgment module judges that the power grid has no fault, repeating the step S1, if the fault judging module judges that the power grid has a fault, starting the shore-based power supply module, emergency power supply is carried out on the power grid of the offshore oilfield group, the shore-based power supply module is used for adjusting the voltage of the power grid of the offshore oilfield group until the fault judgment module judges that the power grid has no fault, if the fault judgment module judges that the power grid has a fault, then an alarm module is started to give an alarm to relevant personnel to remind the relevant personnel that the power grid of the oil field group has a fault, if the fault judgment module judges that the power grid has a fault, and the fault judgment condition is sent to the remote control end through the internet through the network sharing module, so that related personnel can conveniently and remotely know the power grid fault information of the oil field group.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A power grid emergency control method based on a shore-based power supply offshore oilfield group is characterized by comprising the following steps:
s1, monitoring the operation condition of the power grid in real time by using a monitoring module when the power grid system of the oil field group operates;
s2, collecting the power grid operation parameters by using the parameter collection module while monitoring the power grid operation condition, and sending the parameters to the fault judgment module;
s3, analyzing and processing the collected parameters by using a fault judgment module, and judging whether the power grid runs in fault according to the analysis and processing result;
and S4, if the fault judgment module judges that the power grid has no fault, repeating the step S1, and if the fault judgment module judges that the power grid has a fault, starting the shore-based power supply module to perform emergency power supply on the power grid of the offshore oilfield group.
2. The power grid emergency control method based on the shore-based power supply offshore oilfield group as claimed in claim 1, wherein in step S4, if the fault determination module determines that the power grid is faulty, the alarm module is activated to send an alarm to the relevant personnel to remind the relevant personnel that the power grid of the offshore oilfield group is faulty.
3. The power grid emergency control method based on the shore-based power supply offshore oilfield group as claimed in claim 1, wherein in step S4, if the fault determination module determines that the power grid has a fault, the fault determination module sends the fault determination to the remote control end via the internet for the relevant personnel to remotely know the power grid fault information of the oilfield group.
4. The shore-based power supply offshore oilfield group based power grid emergency control method according to claims 1-3, wherein the monitoring module is electrically connected with the offshore oilfield group power grid and is used for acquiring operating parameters of each device in the offshore oilfield group power grid.
5. The shore-based power grid emergency control method for offshore oilfield groups, which is powered on shore, according to claim 4, wherein the monitoring module is further in telecommunication connection with the parameter collection module, and is configured to collect the obtained working parameters and send the collected working parameters to the parameter collection module.
6. The power grid emergency control method based on the shore-based power supply offshore oilfield group as claimed in claim 5, wherein the parameter collection module is electrically connected with the fault judgment module, and the parameter collection module receives the working parameters sent by the monitoring module and sends the working parameters to the fault judgment module.
7. The shore-based power supply offshore oilfield group-based power grid emergency control method according to claim 6, wherein the fault judgment module compares the obtained working parameters with an internal pre-stored standard value, and uses a comparison result difference as a fault judgment basis.
8. The power grid emergency control method based on the shore-based power supply offshore oilfield group as defined in claim 7, wherein a standard value pre-storing unit is arranged inside the fault judgment module and is used for receiving standard values pre-stored by workers when various devices entering the fault judgment module work.
9. The shore-based power supply offshore oilfield group-based power grid emergency control method according to claims 1-3, wherein the shore-based power supply module is electrically connected to the offshore oilfield group power grid and the fault determination module, respectively, and when the fault determination module determines that the working state of the device is a fault, the shore-based power supply module supplies power to the offshore oilfield group power grid.
10. The shore-based power supply offshore oilfield group-based power grid emergency control method according to claim 1, wherein in step S4, the shore-based power supply module is used to adjust the power grid voltage of the offshore oilfield group until the fault determination module determines that the power grid has no fault.
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