CN111221269A - Multi-loop direct current power grid stability simulation test system and method - Google Patents
Multi-loop direct current power grid stability simulation test system and method Download PDFInfo
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Abstract
The application discloses a multi-loop direct current power grid stability simulation test system and a method, wherein the system comprises: the method comprises the steps of building a multi-loop direct current system simulation model in a real-time digital simulator, carrying out parameter control on operation parameters of a direct current system obtained through simulation through a direct current control protection device to obtain a direct current operation state responding to the fault characteristics of the direct current system in operation, sending the direct current operation state to a stability control device, executing a tripping operation through the stability control device, wherein the tripping operation is executed according to the direct current operation state and unit state information capable of carrying out tripping operation in the multi-loop direct current system. The technical problems that the prior art is greatly limited and comprehensive testing requirements cannot be provided for different control characteristics and operation modes of a multi-loop direct current system are solved.
Description
Technical Field
The application relates to the technical field of power systems, in particular to a multi-loop direct-current power grid stability simulation test system and method.
Background
The safety and stability control System is one of the most important contents in three defense lines of a power System, a power grid comprises a multi-loop direct current transmission end System, the number of safety and stability devices in the transmission end System is large, the control mode is complex, dynamic testing must be carried out through a Real Time Digital Simulation (RTDS) test, the safety and stability devices can be guaranteed to adapt to System change and change, and the safe and stable operation of the power grid System is maintained.
The test of the existing safety and stability control device is usually performed on a single stability control substation, the existing test cannot meet the simulation test of a stability control system with a multi-loop direct-current stability control main station, has great limitation, and cannot provide more comprehensive test for various control characteristics and various operation modes.
Disclosure of Invention
The application provides a multi-loop direct current power grid stability simulation test system and method, which are used for solving the technical problems that the existing stability test technology is greatly limited in test results obtained by simulating only by single control characteristics established in a laboratory, and cannot provide comprehensive test requirements for different control characteristics and operation modes of a multi-loop direct current system.
In view of this, the present application provides, in a first aspect, a multi-loop dc power grid stability simulation test system, including: the system comprises a real-time digital simulator, a direct current control protection device and a stability control device;
the real-time digital simulator is used for building a simulation model for the multi-loop direct-current system, sending the obtained simulation operation parameters to the direct-current control protection device, receiving the direct-current operation state of the direct-current control protection device, receiving the tripping instruction information of the stability control device, and adjusting the operation state of the system unit according to the tripping instruction information;
the direct current control protection device is used for receiving the simulation operation parameters sent by the real-time digital simulator, controlling the direct current operation parameters according to the simulation operation parameters, and sending the direct current operation state responded to the real-time digital simulator and the stability control device;
the safety and stability control device is used for receiving the direct current running state sent by the direct current control protection device, determining the machine tripping unit information in the multi-loop direct current system, executing the machine tripping operation according to the direct current running state to obtain the machine tripping instruction information, and sending the machine tripping instruction information to the real-time digital simulator, and the safety and stability control device comprises a multi-loop direct current coordination part and a stability control machine tripping part.
Preferably, the method further comprises the following steps: a human-computer interaction module;
the man-machine interaction module is used for providing an interface for adjusting the direct current operation condition and the output of the generator set and providing an interface for setting a generator tripping action strategy of the simulation stability control device under a multi-circuit direct current operation state or a direct current lockout fault.
Preferably, the real-time digital simulator is further configured to:
and sending the simulation operation parameters and the direct current operation state to the human-computer interaction module, so that the human-computer interaction module provides an interface for adjusting the direct current operation condition and the output of the generator set, and provides an interface for setting a tripping action strategy of the simulation stability control device in a multi-loop direct current operation state or a direct current blocking fault.
Preferably, the method further comprises the following steps: a simulation data conversion device;
the simulation data conversion device is used for converting data types between the real-time digital simulator and the direct-current control protection device, converting data types between the direct-current control protection device and the stability control device, and converting data types between the real-time digital simulator and the stability control device.
Preferably, the simulation data conversion apparatus includes: GTAO interface cards, GTDO interface cards, and GTDI interface cards.
Preferably, the stability control device is specifically configured to:
receiving the direct current running state sent by the direct current control protection device;
acquiring the information of the switchable machine sets accessed to the multi-circuit direct current system, and calculating the total effective switchable quantity;
executing a tripping action according to the total effective switchable amount and the direct current running state;
and sending the cutting instruction information after the cutting is finished to the real-time digital simulator.
The application provides a multi-loop direct current power grid stability simulation test method in a second aspect, which comprises the following steps:
carrying out simulation on the actual operation process of the power grid system, and building a multi-circuit direct current system simulation model to obtain simulation operation parameters;
controlling a direct current operation parameter according to the simulation operation parameter to obtain a response result, wherein the response result is a direct current operation state;
determining the information of a switchable unit of a multi-loop direct current system, and executing a switching action according to the direct current running state to obtain switching instruction information;
and adjusting the running state of the system unit according to the generator tripping instruction information.
Preferably, the method further comprises the following steps:
the adjustment of the direct current operation working condition and the output of the generator set is realized in a man-machine interaction mode, and the simulation operation of the generator tripping action strategy in a multi-circuit direct current operation state or a direct current blocking fault is realized.
Preferably, the controlling the dc operating parameter according to the simulation operating parameter to obtain a response result further includes:
and performing data type conversion on the simulation operation parameters to obtain the simulation operation parameters meeting preset standards.
Preferably, the determining the information of the machine switching unit of the multi-circuit direct current system, and executing the machine switching action according to the direct current running state to obtain the instruction information of the machine switching, includes:
acquiring information of all switchable machine sets accessed to the multi-circuit direct current system, and calculating total effective switchable quantity;
and executing the cutting machine action according to the total effective cutting amount and the direct current operation parameters to obtain cutting machine instruction information.
According to the technical scheme, the embodiment of the application has the following advantages:
in this application, a many times direct current electric wire netting safety and stability analogue test system is provided, include: the real-time digital simulator is used for building a simulation model for the multi-loop direct current system, sending the obtained simulation operation parameters to the direct current control protection device, receiving the direct current operation state of the direct current control protection device, receiving the tripping instruction information of the stability control device and adjusting the operation state of the system unit according to the tripping instruction information; the direct current control protection device is used for receiving the simulation operation parameters sent by the real-time digital simulator, controlling the direct current operation parameters according to the simulation operation parameters and sending the response direct current operation state to the real-time digital simulator and the stability control device; and the stability control device is used for receiving the direct current running state sent by the direct current control protection device, determining the information of the machine cutting machine set in the multi-loop direct current system, executing the machine cutting operation according to the direct current running state to obtain the instruction information of the machine cutting machine, and sending the instruction information of the machine cutting machine to the real-time digital simulator, and comprises a multi-loop direct current coordination part and a stability control machine cutting part.
In the multi-loop direct-current power grid stability simulation test system, a multi-loop direct-current system simulation model is built in a real-time digital simulator, the operation parameters of a direct-current system obtained through simulation are subjected to parameter control through a direct-current control protection device, a response direct-current operation state is obtained, the response direct-current operation state is more consistent with the fault characteristics of the actual direct-current system in operation, then the direct-current operation state is sent to a stability control device, a tripping operation is executed through the stability control device, the tripping operation is executed according to the direct-current operation state and unit state information which can perform tripping operation in the multi-loop direct-current system, the number of tripping units required by the direct-current system can be obtained according to the system operation state parameters, and unit state information accessed in the multi-loop direct-current system can provide alternative switchable units; the direct current running state that different direct current blocking faults lead to can be obtained according to actual operating mode information through the direct current control protection device, the direct current running state that obtains both has the accuracy, possess the comprehensiveness again, handle direct current running state through the steady control device, the unit that needs the machine of cutting in the direct current system that can judge the simulation to carry out the machine cutting operation, guarantee the stability of many times direct current system through correct machine cutting operation, real-time digital simulator also can be according to the running state of the machine set of received machine cutting instruction information adjustment system. Therefore, the multi-loop direct-current power grid stability simulation test system solves the technical problems that the existing stability test technology is limited greatly by a test result obtained by simulating only by single control characteristics established in a laboratory, and comprehensive test requirements cannot be provided for different control characteristics and operation modes of a multi-loop direct-current system.
Drawings
Fig. 1 is a schematic structural diagram of a multiple-circuit dc power grid stability simulation test system according to an embodiment of the present disclosure;
fig. 2 is another schematic structural diagram of a multiple-circuit dc power grid stability simulation test system according to an embodiment of the present disclosure;
fig. 3 is a schematic flow chart of a multi-loop dc power grid stability simulation test method provided in the embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
For easy understanding, please refer to fig. 1, a first embodiment of a multi-loop dc power grid stability simulation test system provided in the present application includes: a real-time digital simulator 101, a direct current control protection device 102 and a stability control device 103.
The real-time digital simulator 101 is used for building a simulation model for the multi-loop direct current system, sending the obtained simulation operation parameters to the direct current control protection device, receiving the direct current operation state of the direct current control protection device, receiving the tripping instruction information of the stability control device, and adjusting the operation state of the system unit according to the tripping instruction information.
It should be noted that the real-time digital simulator not only has the characteristic of digital simulation, but also more importantly, the adoption of parallel processing technology and the design of special hardware ensure the real-time performance of the RTDS operation and the capability of closed-loop test, and can complete the real-time simulation operation of a large-scale power system in a step length of 50 us. In the system, the real-time digital simulator is used for simulating a multi-loop direct current system and adjusting the running state of a unit in the multi-loop direct current system according to feedback generator tripping instruction information obtained by tests.
The direct current control protection device 102 is configured to receive the simulation operation parameters sent by the real-time digital simulator, control the direct current operation parameters according to the simulation operation parameters, and send the response direct current operation status to the real-time digital simulator and the stability control device.
It should be noted that the dc control protection device is mainly used for controlling and protecting the dc running parameters obtained by the simulation of the real-time digital simulator, so that the dc running parameters can be kept consistent with the actual working conditions of the multi-circuit dc system, the dc running parameters are controlled by the received simulation running parameters, and in the case of a dc fault, the dc control protection device triggers a protection mechanism, adjusts the dc running parameters, forms a dc lock, obtains a dc running state, and sends the dc running state to the stability control device, so as to implement subsequent fault testing and corresponding fault operation.
And the stability control device 103 is used for receiving the direct current running state sent by the direct current control protection device, determining the information of the machine cutting machine set in the multi-loop direct current system, executing the machine cutting operation according to the direct current running state to obtain the instruction information of the machine cutting machine, and sending the instruction information of the machine cutting machine to the real-time digital simulator, and comprises a multi-loop direct current coordination component and a stability control machine cutting component.
The stable control device comprises a multi-circuit direct current coordination part and a stable control generator tripping part, wherein the multi-circuit direct current coordination part is mainly used for receiving a direct current running state sent by the direct current control protection device, determining generator tripping information according to a generator set accessed in the multi-circuit direct current system, determining a target generator tripping unit according to actually required generator tripping amount in parameters of the direct current running state, and the generator tripping operation is completed by the stable control generator tripping part, and the generator tripping instruction information is required to be sent to the real-time digital simulator when the generator tripping operation is completed, so that the generator tripping control device can conveniently adjust the running state of the multi-circuit direct current system according to the generator set state information after the generator tripping is completed.
In the multi-loop direct-current power grid stability simulation test system, a multi-loop direct-current system simulation model is built in a real-time digital simulator, the operation parameters of a direct-current system obtained through simulation are subjected to parameter control through a direct-current control protection device, a response direct-current operation state is obtained, the response direct-current operation state is more consistent with the fault characteristics of the actual direct-current system in operation, then the direct-current operation state is sent to a stability control device, a tripping operation is executed through the stability control device, the tripping operation is executed according to the direct-current operation state and unit state information which can perform tripping operation in the multi-loop direct-current system, the number of tripping units required by the direct-current system can be obtained according to the system operation state parameters, and unit state information accessed in the multi-loop direct-current system can provide alternative switchable units; the direct current running state that different direct current blocking faults lead to can be obtained according to actual operating mode information through the direct current control protection device, the direct current running state that obtains both has the accuracy, possess the comprehensiveness again, handle direct current running state through the steady control device, the unit that needs the machine of cutting in the direct current system that can judge the simulation to carry out the machine cutting operation, guarantee the stability of many times direct current system through correct machine cutting operation, real-time digital simulator also can be according to the running state of the machine set of received machine cutting instruction information adjustment system. Therefore, the multi-loop direct-current power grid stability simulation test system solves the technical problems that the existing stability test technology is limited greatly by a test result obtained by simulating only by single control characteristics established in a laboratory, and comprehensive test requirements cannot be provided for different control characteristics and operation modes of a multi-loop direct-current system.
For convenience of understanding, please refer to fig. 2, an embodiment two of a multi-loop dc power grid stability simulation test system is provided in the embodiment of the present application, including: the system comprises a real-time digital simulator 201, a direct current control protection device 202, a stability control device 203, a human-computer interaction module 204 and a simulation data conversion device 205.
The real-time digital simulator 201 is used for building a simulation model for the multi-loop direct current system, sending the obtained simulation operation parameters to the direct current control protection device, receiving the direct current operation state of the direct current control protection device, receiving the tripping instruction information of the stability control device, and adjusting the operation state of the system unit according to the tripping instruction information.
It should be noted that the real-time digital simulator is further configured to: and sending the simulation operation parameters and the direct current operation state to a human-computer interaction module, so that the human-computer interaction module provides an interface for adjusting the direct current operation condition and the output of the generator set, and provides an interface for setting a generator tripping action strategy of the simulation stability control device in a multi-loop direct current operation state or a direct current lockout fault. The setting of the human-computer interaction interface is to facilitate the execution of the simulation test of an operator, the direct current control protection device in the system can carry out the operations of parameter control, adjustment and the like on the human-computer interaction interface, in addition, the adjustment and parameter modification of simulation can be realized through the human-computer interaction interface, and the simulated multi-circuit direct current system is displayed through the human-computer interaction interface for the operator to check and operate.
The direct current control protection device 202 is configured to receive the simulation operation parameters sent by the real-time digital simulator, control the direct current operation parameters according to the simulation operation parameters, and send the response direct current operation status to the real-time digital simulator and the stability control device.
It should be noted that the dc control protection device is mainly used for controlling the operating parameters of the dc system according to the simulation operating parameters, so as to perform a control protection function, so that the operating parameters can be consistent with the actual operating conditions of the multi-circuit dc system, when the dc operating data in the simulation operating parameters fails, the dc control protection device triggers a protection mechanism, controls the dc operating parameters, changes the dc operating state, i.e. dc locking, obtains the related parameters of the dc operating state, and implements subsequent fault testing and corresponding fault operations.
And the stability control device 203 is used for receiving the direct current running state sent by the direct current control protection device, determining the information of the machine cutting machine set in the multi-loop direct current system, executing the machine cutting operation according to the direct current running state to obtain the instruction information of the machine cutting machine, and sending the instruction information of the machine cutting machine to the real-time digital simulator, and comprises a multi-loop direct current coordination component and a stability control machine cutting component.
It should be noted that the stability control device is specifically configured to: receiving a direct current running state sent by a direct current control protection device; acquiring information of all switchable machine sets accessed to the multi-circuit direct current system, and calculating total effective switchable quantity; executing the cutting machine action according to the total effective cutting amount and the direct current running state; and sending the cutting instruction information after the cutting is finished to the real-time digital simulator. The stability control device comprises a multi-loop direct current coordination part and a stability control switching-off part, wherein the multi-loop direct current coordination part is mainly used for receiving a direct current running state sent by the direct current control protection device, determining switchable unit information according to units accessed in the multi-loop direct current system, and calculating the total effective switchable amount, namely the number of the units allowed to be switched off, and not all the units accessed in the multi-loop direct current system can be switched off; and then, determining a target cutting unit according to the actually required unit cutting amount in the running state parameters of the direct current system, wherein the cutting operation is completed by a stable control cutting unit, and the cutting completion needs to send the cutting instruction information of the unit to a real-time digital simulator, so that the running state of the unit in the multi-circuit direct current system can be conveniently adjusted according to the cutting instruction information after the cutting is completed. The tripping command information may be represented by "1" and "0," with "1" representing that the unit is still present and has not been tripped, and "0" representing that the unit has been tripped.
And the human-computer interaction module 204 is used for providing an interface for adjusting the direct-current operation condition and the output of the generator set and providing an interface for setting a tripping action strategy of the simulation stability control device in a multi-circuit direct-current operation state or a direct-current lockout fault.
It should be noted that an interface is provided for the simulation operation and the adjustment control operation of the operator, and the convenience of visualization and operability is provided for the test system.
And the simulation data conversion device 205 is used for performing data type conversion between the real-time digital simulator and the direct-current control protection device, performing data type conversion between the direct-current control protection device and the stability control device, and performing data type conversion between the real-time digital simulator and the stability control device.
It should be noted that the simulation data conversion apparatus includes: GTAO interface cards, GTDO interface cards, and GTDI interface cards. Wherein, the GTAO (Gigabit Transceiver Analog Output) interface card is used for converting an Analog signal sent by the real-time digital simulator into a digital signal after optical coupling processing, and then sending the digital signal to a target device, otherwise, conversion from the digital signal to the Analog signal can be carried out; the GTDO (Gigabit Transceiver Digital Output) interface card is used for converting a switching signal sent by the real-time Digital simulator into a Digital signal after optical coupling processing and then sending the Digital signal to a target device, and otherwise, the GTDO interface card can also complete conversion from the Digital signal to the switching signal; and the GTDI (Gigabit Transceiver digital input) interface card is used for converting the cutting machine state information output by the stability control device into a digital signal and sending the digital signal to the real-time digital simulator.
For convenience of understanding, please refer to fig. 3, an embodiment of a multi-loop dc power grid stability simulation test method is further provided in the present application, including:
301, performing simulation of an actual power grid system operation process, and building a multi-loop direct current system simulation model to obtain simulation operation parameters;
303, controlling the direct current operation parameters according to the simulation operation parameters to obtain a response result, wherein the response result is a direct current operation state;
and 305, adjusting the running state of the system unit according to the generator tripping instruction information.
Further, still include: the adjustment of the direct current operation working condition and the output of the generator set is realized in a man-machine interaction mode, and the simulation operation of the generator tripping action strategy in a multi-circuit direct current operation state or a direct current blocking fault is realized.
Further, determining the information of the machine switching unit according to the fault simulation operation parameters, and executing the machine switching action to obtain the state information of the machine switching unit, wherein the state information comprises:
acquiring information of all switchable machine sets accessed to the multi-circuit direct current system, and calculating total effective switchable quantity;
and executing the cutting machine action according to the total effective cutting amount and the direct current operation parameters to obtain cutting machine instruction information.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for executing all or part of the steps of the method described in the embodiments of the present application through a computer device (which may be a personal computer, a server, or a network device). And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. The utility model provides a many times direct current electric wire netting security analogue test system which characterized in that includes: the system comprises a real-time digital simulator, a direct current control protection device and a stability control device;
the real-time digital simulator is used for building a simulation model for the multi-loop direct-current system, sending the obtained simulation operation parameters to the direct-current control protection device, receiving the direct-current operation state of the direct-current control protection device, receiving the tripping instruction information of the stability control device, and adjusting the operation state of the system unit according to the tripping instruction information;
the direct current control protection device is used for receiving the simulation operation parameters sent by the real-time digital simulator, controlling the direct current operation parameters according to the simulation operation parameters, and sending the direct current operation state responded to the real-time digital simulator and the stability control device;
the safety and stability control device is used for receiving the direct current running state sent by the direct current control protection device, determining the machine tripping unit information in the multi-loop direct current system, executing the machine tripping operation according to the direct current running state to obtain the machine tripping instruction information, and sending the machine tripping instruction information to the real-time digital simulator, and the safety and stability control device comprises a multi-loop direct current coordination part and a stability control machine tripping part.
2. The multi-circuit direct-current power grid stability simulation test system according to claim 1, further comprising: a human-computer interaction module;
the man-machine interaction module is used for providing an interface for adjusting the direct current operation condition and the output of the generator set and providing an interface for setting a generator tripping action strategy of the simulation stability control device under a multi-circuit direct current operation state or a direct current lockout fault.
3. The multi-loop direct current power grid stability simulation test system according to claim 2, wherein the real-time digital simulator is further configured to:
and sending the simulation operation parameters and the direct current operation state to the human-computer interaction module, so that the human-computer interaction module provides an interface for adjusting the direct current operation condition and the output of the generator set, and provides an interface for setting a tripping action strategy of the simulation stability control device in a multi-loop direct current operation state or a direct current blocking fault.
4. The multi-circuit direct-current power grid stability simulation test system according to claim 1, further comprising: a simulation data conversion device;
the simulation data conversion device is used for converting data types between the real-time digital simulator and the direct-current control protection device, converting data types between the direct-current control protection device and the stability control device, and converting data types between the real-time digital simulator and the stability control device.
5. The multi-loop direct-current power grid stability simulation test system according to claim 4, wherein the simulation data conversion device comprises: GTAO interface cards, GTDO interface cards, and GTDI interface cards.
6. The multi-circuit direct-current power grid stability simulation test system according to claim 1, wherein the stability control device is specifically configured to:
receiving the direct current running state sent by the direct current control protection device;
acquiring the information of the switchable machine sets accessed to the multi-circuit direct current system, and calculating the total effective switchable quantity;
executing a tripping action according to the total effective switchable amount and the direct current running state;
and sending the cutting instruction information after the cutting is finished to the real-time digital simulator.
7. A multi-loop direct current power grid stability simulation test method is characterized by comprising the following steps:
carrying out simulation on the actual operation process of the power grid system, and building a multi-circuit direct current system simulation model to obtain simulation operation parameters;
controlling a direct current operation parameter according to the simulation operation parameter to obtain a response result, wherein the response result is a direct current operation state;
determining the information of a switchable unit of a multi-loop direct current system, and executing a switching action according to the direct current running state to obtain switching instruction information;
and adjusting the running state of the system unit according to the generator tripping instruction information.
8. The method for the multi-circuit DC power grid stability simulation test according to claim 7, further comprising:
the adjustment of the direct current operation working condition and the output of the generator set is realized in a man-machine interaction mode, and the simulation operation of the generator tripping action strategy in a multi-circuit direct current operation state or a direct current blocking fault is realized.
9. The method for the multi-circuit direct-current power grid stability simulation test according to claim 7, wherein the step of controlling the direct-current operation parameters according to the simulation operation parameters to obtain the response result further comprises the following steps:
and performing data type conversion on the simulation operation parameters to obtain the simulation operation parameters meeting preset standards.
10. The method for the stability simulation test of the multi-circuit direct-current power grid according to claim 7, wherein the determining the switchable unit information of the multi-circuit direct-current system and executing the switching operation according to the direct-current running state to obtain the switching instruction information comprises:
acquiring information of all switchable machine sets accessed to the multi-circuit direct current system, and calculating total effective switchable quantity;
and executing the cutting machine action according to the total effective cutting amount and the direct current operation parameters to obtain cutting machine instruction information.
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