CN111638699A - Test system of direct current control protection device - Google Patents
Test system of direct current control protection device Download PDFInfo
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- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
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Abstract
The invention relates to the technical field of power systems, and discloses a test system of a direct current control protection device, which comprises a real-time simulation device, a simulation interface board card, a data processing device, a direct current control protection device, a field layer simulation device and a converter valve control system; a first data end of the real-time simulation device is connected with a first input end of the direct-current control protection device through the simulation interface board card and the data processing device in sequence; the first input/output end of the field layer simulation device is connected with the first input/output end of the direct current control protection device, and the second input/output end of the field layer simulation device is connected with the second input/output end of the data processing device; and a first output end of the direct current control protection device is connected with a second data end of the real-time simulation device through the converter valve control system and the simulation interface board card in sequence. The invention avoids the problem of excessive consumption of board card resources, reduces the resource consumption and improves the real-time performance and the reliability of the test system of the direct current control protection device.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a test system of a direct-current control protection device.
Background
High Voltage Direct Current (HVDC) is high-power long-distance direct current transmission which is adopted by utilizing the advantages that stable direct current has no inductive reactance, no capacitive reactance function, no synchronization problem and the like; when the distance is far enough, the economic benefit is obviously better than that of alternating current transmission, and the problem of reactive power stability does not exist, so the method is widely applied.
In recent years, electric power systems tend to be in a state of alternating current-direct current hybrid operation, however, direct current systems and alternating current systems and direct current systems have mutual influence, and therefore higher requirements are put forward on power grid operation and direct current control protection. In the construction and operation of a direct-current transmission system, a control protection device is a key part for guaranteeing the safe operation of the system, and the accurate selection, sensitive and quick response of control protection seriously influences the safe operation of a power grid. Therefore, before the control protection device is put into engineering use, rigorous simulation tests need to be performed on the control protection device.
At present, when an existing control protection device is subjected to simulation test, as the control protection device needs to collect more analog quantity and digital quantity from a real-time simulator of a simulation primary device for logic calculation, more interface processing board cards and special interface cabinet devices need to be equipped, and the resource consumption is high; in addition, in order to connect the system, each board card needs to be connected with the incoming optical fiber of the real-time simulator, and meanwhile, an interface board card needs to be connected to the control protection device to perform complex hard wiring, so that the communication time delay of the simulation system is long, and the real-time performance is poor.
Disclosure of Invention
The invention aims to provide a test system of a direct current control protection device, which can avoid the problem of excessive consumption of board card resources, thereby reducing resource consumption and improving the real-time performance and reliability of the test system of the direct current control protection device.
In order to solve the technical problem, the invention provides a test system of a direct current control protection device, which comprises a real-time simulation device, a simulation interface board card, a data processing device, a direct current control protection device, a field layer simulation device and a converter valve control system, wherein the real-time simulation device is connected with the field layer simulation device;
the real-time simulation device is used for controlling a simulation power grid of a pre-configured primary device according to the received control signal and outputting working parameters of the simulation power grid; the control signal comprises a component control command and a pulse trigger signal, and the pulse trigger signal is used for triggering a converter valve in the simulation power grid to act;
a first input/output end of the simulation interface board card is connected with a first data end of the real-time simulation device, and a second input/output end of the simulation interface board card is connected with a first input/output end of the data processing device;
the data processing device is used for preprocessing the working parameters of the simulation power grid;
the first input end of the direct current control protection device is connected with the output end of the data processing device and is used for receiving the working parameters of the simulation power grid processed by the data processing device so as to calculate and obtain a corresponding control command according to the working parameters of the simulation power grid; wherein the control command comprises the component control command and a trigger release command;
a first input/output end of the field layer simulation device is connected with a first input/output end of the direct current control protection device, a second input/output end of the field layer simulation device is connected with a second input/output end of the data processing device, and the field layer simulation device is used for receiving the component control command sent by the direct current control protection device, so as to simulate a field measurement and control device and send the component control command to the data processing device;
a first input end of the converter valve control system is connected with a first output end of the direct current control protection device and used for receiving the trigger pulse release command sent by the direct current control protection device so as to generate a pulse trigger signal; and a first input/output end of the current conversion control system is connected with a third input/output end of the simulation interface board card, and a fourth input/output end of the simulation interface board card is connected with a second data end of the real-time simulation device.
As a preferred scheme, the simulation interface board card comprises an FPGA board card and a first I/O board card, a first input/output end of the FPGA board card is a first input/output end of the simulation interface board card, and a second input/output end of the FPGA board card is a second input/output end of the simulation interface board card; the first input/output end of the first I/O board card is a third input/output end of the emulation interface board card, and the second input/output end of the first I/O board card is a fourth input/output end of the emulation interface board card.
As a preferred scheme, the real-time simulation device is further configured to, after controlling the corresponding component in the simulation grid according to the component control command, return the current state of the controlled component to the field layer simulation device through the FPGA board card and the data processing device in sequence;
the field layer simulation device is also used for sending the received current state of the controlled component to the direct current control protection device; wherein the component control commands include on/off knife switch action commands, tap gear shifting commands, and alternating current filter switching commands.
As a preferred scheme, the test system of the dc control protection device further includes a background, and a first input/output end of the background is connected to a third input/output end of the field layer simulation device;
the field layer simulation device is also used for sending a fault state signal to the background when the current state of the controlled component is determined to be different from the actual state of the component, so that the background displays corresponding fault information; and the actual state of the component is obtained by the field layer simulation device after the field measurement and control device is simulated according to the component control command.
As a preferred scheme, the real-time simulation device is further configured to return a trigger pulse return detection signal to the converter valve control system through the first I/O board after controlling a converter valve in the simulation power grid according to the pulse trigger signal;
the converter valve control system is further configured to determine whether a converter valve in the simulation power grid is normally conducted according to the trigger pulse rechecking signal when the trigger pulse rechecking signal is received, and send a trigger pulse normal signal to the direct current control protection device when the converter valve in the simulation power grid is determined to be normally conducted.
Preferably, the converter valve control system is further configured to send a trip request to the upper-level control system to request a trip when it is determined that the converter valves in the simulation power grid are not normally turned on.
As a preferred scheme, the data processing device includes a simulation interface device for performing protocol coding on the operating parameters of the simulation power grid, and a merging unit for merging the operating parameters of the simulation power grid;
the first input/output end of the simulation interface device is the first input/output end of the data processing device, the second input/output end of the simulation interface device is the second input/output end of the data processing device, the output end of the simulation interface device is connected with the input end of the merging unit, and the output end of the merging unit is the output end of the data processing device.
As a preferred scheme, the test system of the dc control protection device further includes a second I/O board and a power amplifier, a third data end of the real-time simulation device is connected to a first input/output end of the second I/O board, a second input/output end of the second I/O board is connected to an input end of the power amplifier, and an output end of the power amplifier is connected to a second input end of the dc control protection device.
Preferably, the real-time simulation device comprises a real-time simulation workstation and a real-time digital simulator, wherein the real-time simulation workstation is used for configuring the simulation power grid;
the output end of the real-time simulation workstation is connected with the input end of the real-time digital simulator, the first data end of the real-time digital simulator is the first data end of the real-time simulation device, the second data end of the real-time digital simulator is the second data end of the real-time simulation device, and the third data end of the real-time digital simulator is the third data end of the real-time simulation device.
As a preferred scheme, optical fiber communication is adopted between the real-time simulation device and the simulation interface board card, between the simulation interface board card and the data processing device, between the data processing device and the dc control protection device, between the data processing device and the site layer simulation device, between the converter valve control system and the dc control protection device, and between the converter valve control system and the simulation interface board card
Compared with the prior art, the invention provides a method for testing the direct current control protection device by arranging the real-time simulation device, the simulation interface board card, the data processing device, the field layer simulation device and the converter valve control system; meanwhile, data transmission between the real-time simulation device and the direct-current control protection device is carried out through the simulation interface board card, so that the problems that all direct-current and alternating-current system analog quantity and digital quantity of a direct-current control protection test system in the prior art are sent out through a common interface board card in a hard wiring mode, the number of interface processing board cards is large, and special interface cabinet equipment is needed are effectively solved, the problem of excessive board card resource consumption is avoided, and resource consumption is reduced; in addition, in this embodiment, by using the emulation interface board card, the wiring of the test system of the dc control protection device is simplified, so that the communication delay is shortened, and thus the real-time performance and reliability of the test system of the dc control protection device are improved.
Drawings
Fig. 1 is a schematic structural diagram of a test system of a dc control protection device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a test system of another dc control protection device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a test system of another dc control protection device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a DC simulation model provided by an embodiment of the present invention;
fig. 5 is a schematic flowchart illustrating a testing method of a testing system of a dc control protection device according to an embodiment of the present invention.
Wherein, 1, a real-time simulation device; 11. a real-time simulation workstation; 12. a real-time digital simulator; 2. simulating an interface board card; 21. an FPGA board card; 22. a first I/O board card; 3. a data processing device; 31. a simulation interface device; 32. a merging unit; 4. a direct current control protection device; 5. a field layer simulation device; 6. a converter valve control system; 7. a background; 8. a second I/O board card; 9. a power amplifier.
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.
Fig. 1 is a schematic structural diagram of a test system of a dc control protection device according to an embodiment of the present invention.
In the embodiment of the invention, the test system of the direct current control protection device comprises a real-time simulation device 1, a simulation interface board card 2, a data processing device 3, a direct current control protection device 4, a field layer simulation device 5 and a converter valve control system 6;
the real-time simulation device 1 is used for controlling a simulation power grid of a pre-configured primary device according to a received control signal and outputting working parameters of the simulation power grid; the control signal comprises a component control command and a pulse trigger signal, and the pulse trigger signal is used for triggering a converter valve in the simulation power grid to act;
a first input/output end of the simulation interface board 2 is connected with a first data end of the real-time simulation device 1, and a second input/output end of the simulation interface board 2 is connected with a first input/output end of the data processing device 3;
the data processing device 3 is used for preprocessing the working parameters of the simulation power grid;
a first input end of the direct current control protection device 4 is connected with an output end of the data processing device 3, and is used for receiving the working parameters of the simulation power grid processed by the data processing device 3, so as to calculate and obtain a corresponding control command according to the working parameters; wherein the control command comprises the component control command and a trigger release command;
a first input/output end of the field layer simulation device 5 is connected with a first input/output end of the direct current control protection device 4, a second input/output end of the field layer simulation device 5 is connected with a second input/output end of the data processing device 4, and the field layer simulation device is used for receiving the component control command sent by the direct current control protection device 4, so as to simulate a field measurement and control device, and sending the component control command to the data processing device 4;
a first input end of the converter valve control system 6 is connected with a first output end of the dc control protection device 4, and is configured to receive the trigger pulse release command sent by the dc control protection device 4 to generate a pulse trigger signal; a first input/output end of the commutation control system 6 is connected with a third input/output end of the simulation interface board 2, and a fourth input/output end of the simulation interface board 2 is connected with a second data end of the real-time simulation device 1.
Specifically, in the test system of the dc control protection device of this embodiment, the real-time simulation device 1 is used to simulate a dc power grid primary device and an ac system network connected to the dc power transmission system primary device, that is, a simulation power grid of the primary device is built, and the simulation power grid is controlled according to the received control signal, so as to cut off a fault line and isolate a fault; the simulation power grid comprises a three-terminal conventional direct-current converter transformer, a converter valve, a direct-current line, a direct-current grounding electrode, an alternating-current bus, an alternating-current filter, an equivalent power supply and the like, and is a three-terminal conventional direct-current simulation model as shown in fig. 4. Transmitting the working parameters of the simulation power grid output by the real-time simulation device 1 to the data processing device 3 through the simulation interface board card 2, and preprocessing the working parameters of the simulation power grid by the data processing device 3; wherein the pretreatment specifically comprises the following steps: and carrying out protocol conversion on the working parameters of the simulation power grid, and merging the working parameters. The working parameters of the simulation power grid processed by the data processing device 3 are transmitted to the direct current control protection device 4, and the direct current control protection device 4 performs control calculation and protection calculation according to the working parameters to obtain and output corresponding control commands, so that the state and response condition of the control protection device are observed in real time, and meanwhile, the rectification direct current system is ensured to operate in a reasonable interval, and faults are effectively isolated; the operating parameters of the simulation power grid comprise the voltage quantity and the current quantity of the direct current system and the voltage quantity and the current quantity of the alternating current system.
Meanwhile, in order to realize real-time converter valve control, a trigger pulse release command output by the direct current control protection device 4 of the embodiment is transmitted to the converter valve control system 5; after receiving the trigger pulse release command, the converter valve control system 5 generates a pulse trigger signal, and the pulse trigger signal is transmitted to the converter valve model in the real-time simulation device 1 through the third input/output end of the simulation interface board 2 and the fourth input/output end of the simulation interface board 2 in sequence, so as to realize real-time converter valve triggering.
In addition, in order to truly simulate the dynamic response of the dc control protection device 4, the test system of the dc control protection device of this embodiment also adopts the field layer simulation device 5 to simulate the field measurement and control device; the field layer simulation device 5 receives the component control command issued by the dc control protection device 4 in real time, and the component control command output from the field layer simulation device 5 is transmitted to the real-time simulation device 1 sequentially through the data processing device 3 and the simulation interface board 2, so that the real-time simulation device 1 controls the state of the corresponding component in the simulation grid according to the component control command, thereby implementing the actual regulation and control of the primary equipment in the simulation grid.
In the embodiment of the present invention, the three data paths form a whole dc control protection test closed loop. The operation condition of the test system of the direct current control protection device is adjusted, faults are set at different positions, the control response correctness of the control system under different operation conditions is detected, and the protection system accurately acts and isolates the faults under different fault conditions of the system.
In the embodiment of the invention, the real-time simulation device 1, the simulation interface board card 2, the data processing device 3, the field layer simulation device 5 and the converter valve control system 6 are arranged to test the direct-current control protection device 4; meanwhile, data transmission between the real-time simulation device 1 and the direct-current control protection device 4 is carried out through the simulation interface board card 2, so that the problems that in the prior art, all direct-current and alternating-current system analog quantity and digital quantity of a direct-current control protection test system are sent out through hard wiring of a common interface board card, the number of interface processing board cards is large, and special interface cabinet equipment needs to be adopted are effectively solved, and therefore the problem of excessive consumption of board card resources is solved, and resource consumption is reduced; in addition, in this embodiment, by using the simulation interface board card 2, the wiring of the test system of the dc control protection device is simplified, so that the communication delay is shortened, and thus the real-time performance and reliability of the test system of the dc control protection device are improved.
In a preferred embodiment, the real-time simulation apparatus 1 of the present embodiment includes a real-time simulation workstation 11 for configuring the simulation grid and a real-time digital simulator 12;
the output end of the real-time simulation workstation 11 is connected with the input end of the real-time digital simulator 12, the first data end of the real-time digital simulator 12 is the first data end of the real-time simulation device 1, the second data end of the real-time digital simulator 12 is the second data end of the real-time simulation device 1, and the third data end of the real-time digital simulator 12 is the third data end of the real-time simulation device 1.
Specifically, the real-time simulation workstation 11 is used for building an RTDS simulation power grid of the primary ac and dc power grid equipment; and setting simulation model parameters of primary equipment of the alternating current and direct current power grids, realizing different operation condition simulation and wiring form simulation of alternating current and direct current systems by parameter adjustment, and setting and simulating faults of the direct current system by faults at different positions. The real-time digital simulator 12 is configured to obtain a simulated ac and dc power grid, and control a circuit breaker to cut off the fault line and isolate a fault according to a control command of the dc control protection device 4; the simulated alternating current and direct current power grids are the simulated power grids which are built in advance and used for simulating the operation working conditions of the actual power grids.
In the embodiment of the present invention, data transmission is performed between the real-time simulation workstation 11 and the real-time digital simulator 12 through a network cable. Of course, this is merely one example of the present invention, and the present invention is not limited thereto.
In a preferred embodiment, the simulation interface board card 2 of this embodiment includes an FPGA board card 21 and a first I/O board card 22, a first input/output end of the FPGA board card 21 is a first input/output end of the simulation interface board card 2, and a second input/output end of the FPGA board card 21 is a second input/output end of the simulation interface board card 2; the first input/output end of the first I/O board 22 is a third input/output end of the emulation interface board 2, and the second input/output end of the first I/O board 22 is a fourth input/output end of the emulation interface board 2.
It can be understood that the working parameters of the simulation power grid are output from the first data end of the real-time digital simulator 12, and then are transmitted to the first input/output end of the FPGA board 21, and are output from the second input/output end of the FPGA board 21 to the data processing device 3, and then are transmitted from the data processing device 3 to the dc control protection device 4. The component control command output from the dc control protection device 4 passes through the field layer simulation device 5, the data processing device 3, and the FPGA board 21 in sequence and then is transmitted to the real-time digital simulator 12. The pulse trigger signal output from the commutation control system 6 is sequentially transmitted to the real-time digital simulator 12 through the first input/output end of the first I/O board 22, the second input/output end of the first I/O board 22, and the second data end of the real-time digital simulator 12.
In the embodiment of the invention, the FPGA-based high-speed digital quantity communication board card is adopted for data transmission, so that the resource consumption is further reduced, and the real-time property of data transmission is improved.
In a preferred embodiment, the real-time simulation apparatus 1 of this embodiment is further configured to, after controlling the corresponding component in the simulation grid according to the component control command, return the current state of the controlled component to the field layer simulation apparatus 5 through the FPGA board 21 and the data processing apparatus 3 in sequence;
the field layer simulation device 5 is further configured to send the received current state of the controlled component to the dc control protection device 4; wherein the component control commands include on/off knife switch action commands, tap gear shifting commands, and alternating current filter switching commands.
It can be understood that, after the real-time simulation device 1 controls the corresponding component in the simulation power grid according to the received component control command, the current state of the controlled component is returned to the field layer simulation device 5 sequentially through the FPGA board 21 and the data processing device 3, and the field layer simulation device 5 sends the current state of the controlled component to the direct current control protection device 4 for confirmation as a protection action and confirmation of the state of the controlled component. It should be noted that the component control command specifically includes: the switching device comprises a rapid switching \ disconnecting link action command, a tap shifting command, an alternating current filter switching command, a slow switching \ disconnecting link action command, a tap shifting command and an alternating current filter switching command.
Further, as shown in fig. 2, the test system of the dc control protection device of this embodiment further includes a background 7, and a first input/output end of the background 7 is connected to a third input/output end of the field layer simulation apparatus 5;
the field layer simulation device 5 is further configured to send a fault state signal to the background 7 when it is determined that the current state of the controlled component is different from the actual state of the component, so that the background 7 displays corresponding fault information; and the actual state of the component is obtained by the field layer simulation device 5 after the field measurement and control device is simulated according to the component control command.
It can be understood that, after receiving the component control command sent by the dc control protection device 4, the field layer simulation device 5 performs simulation of the field measurement and control device according to the component control command, so as to obtain the actual state of the controlled component; when the field layer simulation device 5 receives the current state of the controlled component returned by the real-time digital simulator 12, the current state of the controlled component is compared with the actual state of the component, and when the current state of the controlled component is determined to be different from the actual state of the component, a fault state signal is sent to the background 7, so that the background 7 displays corresponding fault information, and the states of switch validation, converter gear shifting, alternating current filter switching and the like are checked.
In the embodiment of the present invention, the first input/output terminal of the field floor simulation apparatus 5 may communicate with the dc control protection apparatus 4 through a profile bus. Of course, this is only one embodiment of the present invention, and the present invention is not limited to this.
In addition, in the embodiment of the present invention, a second input/output end of the background 7 is connected to a second input/output end of the dc control protection device 4, so as to send a control instruction to the dc control protection device 4 through the background 7.
In a preferred embodiment, the real-time simulation apparatus 1 of this embodiment is further configured to return a trigger pulse review signal to the converter valve control system 6 through the first I/O board 21 after controlling the converter valve in the simulation grid according to the pulse trigger signal;
the converter valve control system 6 is further configured to, when receiving the trigger pulse recheck signal, determine whether the converter valve in the simulation power grid is normally turned on according to the trigger pulse recheck signal, and when determining that the converter valve in the simulation power grid is normally turned on, send a trigger pulse normal signal to the dc control protection device 5.
Specifically, the determining, according to the trigger pulse recheck signal, whether a converter valve in the simulation power grid is normally turned on includes:
when the number of the received trigger pulse rechecking signals reaches a preset number threshold, judging that a converter valve in the simulation power grid is normally conducted;
and when the number of the received trigger pulse rechecking signals does not reach a preset number threshold value, judging that a converter valve in the simulation power grid is not normally conducted. The number threshold may be set according to an actual use situation, which is not limited in the present invention.
When the converter valve control system 6 of this embodiment determines that the converter valve in the simulation power grid is normally turned on, it sends a trigger pulse normal signal to the dc control protection device 4, which is used for confirming a protection action and confirming a state of the converter valve in the simulation power grid.
Further, the converter valve control system 6 of this embodiment is further configured to send a trip request to the upper-level control system to request a trip when it is determined that the converter valves in the simulation power grid are not normally turned on. Wherein the upper-level control system can be the direct current control protection device 4; the trip request is for requesting a trip.
In a preferred implementation manner, the data processing apparatus 3 of this embodiment includes a simulation interface apparatus 31 for performing protocol coding on the operating parameters of the simulation power grid, and a merging unit 32 for merging the operating parameters of the simulation power grid;
a first input/output end of the emulation interface device 31 is a first input/output end of the data processing device 3, a second input/output end of the emulation interface device 31 is a second input/output end of the data processing device 3, an output end of the emulation interface device 31 is connected with an input end of the merging unit 32, and an output end of the merging unit 32 is an output end of the data processing device.
It can be understood that the working parameters of the simulation power grid output from the real-time digital simulator 12 are transmitted to the simulation interface device 31 through the FPGA board 21, so that the simulation interface device 31 performs protocol coding on the working parameters of the simulation power grid according to the data requirements of different devices of the dc control protection device 4, and then transmits the coded data to the merging unit 32, so as to merge the working parameters of the simulation power grid and transmit the merged working parameters to the dc control protection device 4, so as to control logic calculation and protection logic calculation of the control protection system. The component control command output from the dc control protection device 4 is transmitted to the real-time digital simulator 12 after sequentially passing through the field layer simulation device 5, the simulation interface device 31, and the FPGA board 21.
As shown in fig. 3, in a preferred embodiment, the test system of the dc control protection device further includes a second I/O board 8 and a power amplifier 9, a third data terminal of the real-time simulation apparatus 1 is connected to a first input/output terminal of the second I/O board 8, a second input/output terminal of the second I/O board is connected to an input terminal of the power amplifier 9, and an output terminal of the power amplifier 9 is connected to a second input terminal of the dc control protection device 4.
Through the arrangement of the second I/O board 8 and the power amplifier 9, a small signal output from the real-time simulation device 1 can be transmitted to the power amplifier 9 through the second I/O board 8, amplified and output to the direct-current control protection device 4, and is used for controlling control logic calculation and protection logic calculation of a protection system. The small signal can be an operating parameter of the simulated power grid with a smaller signal.
In a preferred embodiment, optical fiber communications are adopted between the real-time simulation apparatus 1 and the simulation interface board 2, between the simulation interface board 2 and the data processing apparatus 3, between the data processing apparatus 3 and the dc control protection apparatus 4, between the data processing apparatus 3 and the field layer simulation apparatus 5, between the converter valve control system 6 and the dc control protection apparatus 4, and between the converter valve control system 6 and the simulation interface board 2 in this embodiment.
Specifically, the real-time simulation device 1 and the simulation interface board card 2 are in optical fiber communication, specifically: optical fiber communication is adopted between the real-time digital simulator 12 and the FPGA board card 21, and between the real-time digital simulator 12 and the first I/O board card 22. The simulation interface board card 2 and the data processing device 3 are communicated by optical fibers, and the method specifically comprises the following steps: the FPGA board card 21 and the simulation interface device 31 are communicated by optical fibers. The data processing device 3 and the direct current control protection device 4 adopt optical fiber communication, and specifically, the method comprises the following steps: the merging unit 32 and the dc control protection device 4 communicate with each other by optical fiber. The data processing device 3 and the field layer simulation device 5 adopt optical fiber communication, and specifically, the method comprises the following steps: the simulation interface device 31 and the field layer simulation device 5 adopt optical fiber communication. The converter valve control system 6 and the simulation interface board card 2 are communicated by optical fibers, and the method specifically comprises the following steps: and the converter valve control system 6 and the first I/O board card 22 adopt optical fiber communication. In addition, the emulation interface device 31 and the merging unit 32. The second I/O board 8 and the real-time digital simulator 12 also communicate with each other by optical fiber. The optical fiber is adopted to transmit data, so that the stability and the accuracy of the data are effectively improved, the accurate test of the function and the dynamic performance of the direct-current transmission control protection system is realized, and the reliable technical guarantee is provided for engineering production.
In the embodiment of the present invention, the process of performing a test by using the test system of the dc control protection device specifically includes: steady state control performance testing and direct current fault type testing.
Specifically, as shown in fig. 5, when the steady-state control performance test is performed, the following are sequentially performed: (1) running an RTDS model in a real-time simulator; (2) respectively configuring a direct current system operation mode and a wiring mode; (3) unlocking direct current, and increasing and decreasing power; (4) reactive switching; (5) and judging whether the steady-state and dynamic control performances of the direct-current control system are normal according to the power and current step and the steady-state operation condition.
When carrying out direct current fault class test, carry out in proper order: (1) testing the fault of the alternating current bus; (2) testing faults of a converter valve area; (3) testing faults of the direct current field area; (4) and (4) carrying out fault test on the direct current line area, and judging the correctness of the direct current protection function according to the test result.
Of course, the above-mentioned testing process is only one of the testing processes of the embodiments of the present invention, and the present invention is not limited thereto.
In summary, the present invention provides a test system for a dc control protection device, which is configured with the real-time simulation device 1, the simulation interface board 2, the data processing device 3, the field layer simulation device 5, and the converter valve control system 6, so as to test the dc control protection device 4; meanwhile, data transmission between the real-time simulation device 1 and the direct-current control protection device 4 is carried out through the simulation interface board card 2, so that the problems that in the prior art, all direct-current and alternating-current system analog quantity and digital quantity of a direct-current control protection test system are sent out through hard wiring of a common interface board card, the number of interface processing board cards is large, and special interface cabinet equipment needs to be adopted are effectively solved, and therefore the problem of excessive consumption of board card resources is solved, and resource consumption is reduced; in addition, in this embodiment, by using the simulation interface board card 2, the wiring of the test system of the dc control protection device is simplified, so that the communication delay is shortened, and thus the real-time performance and reliability of the test system of the dc control protection device are improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A test system of a direct current control protection device is characterized by comprising a real-time simulation device, a simulation interface board card, a data processing device, a direct current control protection device, a field layer simulation device and a converter valve control system;
the real-time simulation device is used for controlling a simulation power grid of a pre-configured primary device according to the received control signal and outputting working parameters of the simulation power grid; the control signal comprises a component control command and a pulse trigger signal, and the pulse trigger signal is used for triggering a converter valve in the simulation power grid to act;
a first input/output end of the simulation interface board card is connected with a first data end of the real-time simulation device, and a second input/output end of the simulation interface board card is connected with a first input/output end of the data processing device;
the data processing device is used for preprocessing the working parameters of the simulation power grid;
the first input end of the direct current control protection device is connected with the output end of the data processing device and is used for receiving the working parameters of the simulation power grid processed by the data processing device so as to calculate and obtain a corresponding control command according to the working parameters of the simulation power grid; wherein the control command comprises the component control command and a trigger release command;
a first input/output end of the field layer simulation device is connected with a first input/output end of the direct current control protection device, a second input/output end of the field layer simulation device is connected with a second input/output end of the data processing device, and the field layer simulation device is used for receiving the component control command sent by the direct current control protection device, so as to simulate a field measurement and control device and send the component control command to the data processing device;
a first input end of the converter valve control system is connected with a first output end of the direct current control protection device and used for receiving the trigger pulse release command sent by the direct current control protection device so as to generate a pulse trigger signal; and a first input/output end of the current conversion control system is connected with a third input/output end of the simulation interface board card, and a fourth input/output end of the simulation interface board card is connected with a second data end of the real-time simulation device.
2. The test system of the dc control protection device according to claim 1, wherein the simulation interface board includes an FPGA board and a first I/O board, a first input/output end of the FPGA board is a first input/output end of the simulation interface board, and a second input/output end of the FPGA board is a second input/output end of the simulation interface board; the first input/output end of the first I/O board card is a third input/output end of the emulation interface board card, and the second input/output end of the first I/O board card is a fourth input/output end of the emulation interface board card.
3. The test system of the dc control protection device according to claim 2, wherein the real-time simulation device is further configured to return the current state of the controlled component to the field layer simulation apparatus through the FPGA board and the data processing device in sequence after controlling the corresponding component in the simulation power grid according to the component control command;
the field layer simulation device is also used for sending the received current state of the controlled component to the direct current control protection device; wherein the component control commands include on/off knife switch action commands, tap gear shifting commands, and alternating current filter switching commands.
4. The test system of the dc control protection device according to claim 3, wherein the test system of the dc control protection device further comprises a background, and a first input/output terminal of the background is connected to a third input/output terminal of the field layer simulation apparatus;
the field layer simulation device is also used for sending a fault state signal to the background when the current state of the controlled component is determined to be different from the actual state of the component, so that the background displays corresponding fault information; and the actual state of the component is obtained by the field layer simulation device after the field measurement and control device is simulated according to the component control command.
5. The test system of the dc control protection device according to claim 2, wherein the real-time simulation device is further configured to return a trigger pulse review signal to the converter valve control system through the first I/O board after controlling a converter valve in the simulation power grid according to the pulse trigger signal;
the converter valve control system is further configured to determine whether a converter valve in the simulation power grid is normally conducted according to the trigger pulse rechecking signal when the trigger pulse rechecking signal is received, and send a trigger pulse normal signal to the direct current control protection device when the converter valve in the simulation power grid is determined to be normally conducted.
6. The test system of the direct current control protection device according to claim 5, wherein the converter valve control system is further used for sending a tripping request to the upper level control system to request tripping when the converter valve in the simulation power grid is judged not to be normally conducted.
7. The test system of the direct current control protection device according to any one of claims 1 to 6, wherein the data processing device comprises a simulation interface device for protocol coding the operating parameters of the simulation power grid and a merging unit for merging the operating parameters of the simulation power grid;
the first input/output end of the simulation interface device is the first input/output end of the data processing device, the second input/output end of the simulation interface device is the second input/output end of the data processing device, the output end of the simulation interface device is connected with the input end of the merging unit, and the output end of the merging unit is the output end of the data processing device.
8. The system according to any one of claims 1 to 6, wherein the system further comprises a second I/O board and a power amplifier, the third data terminal of the real-time simulation device is connected to the first input/output terminal of the second I/O board, the second input/output terminal of the second I/O board is connected to the input terminal of the power amplifier, and the output terminal of the power amplifier is connected to the second input terminal of the DC control protection device.
9. The test system of the dc control protection device of claim 8, wherein the real-time simulation device comprises a real-time simulation workstation for configuring the simulation grid and a real-time digital simulator;
the output end of the real-time simulation workstation is connected with the input end of the real-time digital simulator, the first data end of the real-time digital simulator is the first data end of the real-time simulation device, the second data end of the real-time digital simulator is the second data end of the real-time simulation device, and the third data end of the real-time digital simulator is the third data end of the real-time simulation device.
10. The system for testing a dc control protection device according to any one of claims 1 to 6, wherein optical fiber communication is adopted between the real-time simulation device and the simulation interface board, between the simulation interface board and the data processing device, between the data processing device and the dc control protection device, between the data processing device and the site-level simulation device, between the converter valve control system and the dc control protection device, and between the converter valve control system and the simulation interface board.
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| CN115586730A (en) * | 2021-07-05 | 2023-01-10 | 全球能源互联网研究院有限公司 | Power electronic simulation system, disturbance injection method and electronic equipment |
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