CN107306029B - Analog quantity transmission system and method for hybrid power transmission control protection device - Google Patents
Analog quantity transmission system and method for hybrid power transmission control protection device Download PDFInfo
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- CN107306029B CN107306029B CN201610247677.4A CN201610247677A CN107306029B CN 107306029 B CN107306029 B CN 107306029B CN 201610247677 A CN201610247677 A CN 201610247677A CN 107306029 B CN107306029 B CN 107306029B
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The invention discloses an analog quantity transmission system and method of a hybrid power transmission control protection device, relates to the technical field of power systems, and is used for timely finding out weak links of a hybrid power transmission system and improving safe operation of a power grid. The analog quantity transmission system of the hybrid power transmission control protection device comprises: the system comprises an interface conversion device, a photoelectric conversion device, a conventional direct current unit, a flexible direct current unit and an RTDS modeling workstation for outputting alternating current analog quantity and direct current analog quantity; the interface conversion device is respectively connected with the RTDS modeling workstation, the conventional direct current unit and the flexible direct current unit in a signal manner; the photoelectric conversion device is respectively connected with the RTDS modeling workstation, the conventional direct current unit and the flexible direct current unit in a signal mode. The analog quantity transmission system and method of the hybrid power transmission control protection device are used for a hybrid power transmission system comprising a conventional direct current system and a flexible direct current system.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to an analog quantity transmission system and method of a hybrid power transmission control protection device.
Background
The continuous expansion of the power grid scale brings great economic benefit, but brings a plurality of new technical problems for the safe operation of the power grid, so that the operation and management of the power grid are more complex, and the power transmission system of the power grid is required to be subjected to deep research and analysis to find out the weak links of the power transmission system, thereby reasonably regulating the operation mode of the power grid and ensuring the safe and stable operation of the power grid in different development stages.
At present, the power grid mainly develops towards ultra-high voltage, large-capacity and long-distance AC/DC parallel operation, namely, the power transmission system of the power grid is mainly a conventional DC/flexible DC hybrid power transmission system. However, although the hybrid power transmission system can solve the problem that the direct current phase conversion is easy to fail caused by the conventional direct current power transmission system and the problems of small power transmission capacity and high manufacturing cost caused by the flexible direct current power transmission system, the hybrid power transmission system can complicate the operation and control of the power grid, and if weak links existing in the hybrid power transmission system cannot be found in time in the use process of the hybrid power transmission system, the safe operation of the power grid is very easy to influence.
Disclosure of Invention
The invention aims to provide an analog quantity transmission system and method of a hybrid power transmission control protection device, which are used for timely finding out weak links of a hybrid power transmission system and improving safe operation of a power grid.
In order to achieve the above object, the present invention provides the following technical solutions:
an analog quantity transmission system of a hybrid transmission control protection device, comprising: the system comprises an interface conversion device, a photoelectric conversion device, a conventional direct current unit, a flexible direct current unit and an RTDS modeling workstation for outputting alternating current analog quantity and direct current analog quantity; wherein,
the interface conversion device is respectively connected with the RTDS modeling workstation, the conventional direct current unit and the flexible direct current unit in a signal manner; the interface conversion device receives the alternating current analog quantity output by the RTDS modeling workstation and outputs the alternating current analog quantity to the conventional direct current unit and the flexible direct current unit respectively;
the photoelectric conversion device is respectively connected with the RTDS modeling workstation, the conventional direct current unit and the flexible direct current unit in a signal manner; the photoelectric conversion device receives the direct current analog quantity output by the RTDS modeling workstation and outputs the direct current analog quantity to the conventional direct current unit and the flexible direct current unit respectively.
The analog quantity transmission system of the hybrid power transmission control protection device provided by the invention has the following beneficial effects:
the RTDS modeling workstation simulates the hybrid power transmission system with the conventional direct current unit and the flexible direct current unit in real time, and is used for timely finding out weak links in the operation of the hybrid power transmission system; after simulation processing, the RTDS modeling workstation divides the analog quantity required to be output into an alternating current analog quantity and a direct current analog quantity, and then transmits the alternating current analog quantity and the direct current analog quantity through different transmission routes: the alternating current analog quantity is concentrated and summarized through the interface conversion device and then is respectively output to the conventional direct current unit and the flexible direct current unit, and the direct current analog quantity is converted into an optical signal from an electric signal through the photoelectric conversion device and then is output to the conventional direct current unit and the flexible direct current unit; the conventional direct current unit and the flexible direct current unit have the functions of controlling and protecting the power transmission system, and the conventional direct current unit and the flexible direct current unit form a hybrid power transmission control and protection device together. According to the analog quantity transmission system of the hybrid power transmission control protection device, through the isolated transmission of different analog quantities, the anti-interference performance of the analog quantity transmission system is improved, the accurate transmission of analog quantities can be ensured, the analog quantity output by the analog quantity transmission system after the simulation processing of the RTDS modeling workstation is accurately transmitted to the conventional direct current unit and the flexible direct current unit, and the hybrid power transmission control protection device can be ensured to timely control and protect the hybrid power transmission system, so that the safe operation of a power grid is improved.
The invention also provides an analog quantity transmission method of the hybrid power transmission control protection device, which comprises the following steps:
step one, an RTDS modeling workstation simulates a hybrid power transmission control protection device with a conventional direct current unit and a flexible direct current unit in real time, outputs alternating current analog quantity to an interface conversion device and outputs direct current analog quantity to a photoelectric conversion device;
step two, after receiving the alternating current analog quantity output by the RTDS modeling workstation, the interface conversion device outputs the alternating current analog quantity to the conventional direct current unit and the flexible direct current unit respectively; and after receiving the direct current analog quantity output by the RTDS modeling workstation, the photoelectric conversion device outputs the direct current analog quantity to the conventional direct current unit and the flexible direct current unit respectively.
The analog quantity transmission method of the hybrid power transmission control protection device has the same beneficial effects as those of the analog quantity transmission system of the hybrid power transmission control protection device. According to the analog quantity transmission method of the hybrid power transmission control protection device, for different analog quantities output by the RTDS modeling workstation, the analog quantity to be transmitted is precisely transmitted to the conventional direct current unit and the flexible direct current unit in an isolated transmission mode, so that the hybrid power transmission control protection device is used for controlling and protecting a hybrid power transmission system in time, and the safe operation of a power grid is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a schematic structural diagram of an analog transmission system of a hybrid transmission control protection device according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an analog transmission system of a hybrid power transmission control protection device according to a second embodiment of the present invention.
Reference numerals:
1-DB37 cable, 2-conductor,
3-DB78 cable, 4-fiber.
Detailed Description
In order to facilitate understanding, the analog quantity transmission system of the hybrid transmission control protection device provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
Referring to fig. 1, an analog transmission system of a hybrid transmission control protection device according to an embodiment of the present invention includes: the system comprises an interface conversion device, a photoelectric conversion device, a conventional direct current unit, a flexible direct current unit and an RTDS modeling workstation for outputting alternating current analog quantity and direct current analog quantity; wherein,
the interface conversion device is respectively connected with the RTDS modeling workstation, the conventional direct current unit and the flexible direct current unit in a signal manner; the interface conversion device receives the alternating current analog quantity output by the RTDS modeling workstation and outputs the alternating current analog quantity to the conventional direct current unit and the flexible direct current unit respectively;
the photoelectric conversion device is respectively connected with the RTDS modeling workstation, the conventional direct current unit and the flexible direct current unit in a signal manner; the photoelectric conversion device receives the direct current analog quantity output by the RTDS modeling workstation and outputs the direct current analog quantity to the conventional direct current unit and the flexible direct current unit respectively.
When the analog quantity transmission system with the structure is adopted for analog quantity transmission, the RTDS modeling workstation simulates a hybrid power transmission system with a conventional direct current unit and a flexible direct current unit in real time, outputs alternating current analog quantity to the interface conversion device, and outputs direct current analog quantity to the photoelectric conversion device; the photoelectric conversion device is respectively connected with the RTDS modeling workstation, the conventional direct current unit and the flexible direct current unit in a signal way, and outputs the direct current analog quantity to the conventional direct current unit and the flexible direct current unit after receiving the direct current analog quantity output by the RTDS modeling workstation.
The RTDS modeling workstation simulates the hybrid power transmission system with the conventional direct current unit and the flexible direct current unit in real time, and is used for timely finding out weak links in the operation of the hybrid power transmission system; after simulation processing, the RTDS modeling workstation divides the analog quantity required to be output into an alternating current analog quantity and a direct current analog quantity, and then the alternating current analog quantity and the direct current analog quantity are transmitted in an isolated mode through different transmission routes; the conventional direct current unit and the flexible direct current unit have the functions of controlling and protecting the power transmission system, and the conventional direct current unit and the flexible direct current unit form a hybrid power transmission control and protection device together. According to the analog quantity transmission system of the hybrid power transmission control protection device, through the isolated transmission of different analog quantities, the anti-interference performance of the analog quantity transmission system is improved, the accurate transmission of analog quantities can be ensured, the analog quantity output by the analog quantity transmission system after the simulation processing of the RTDS modeling workstation is accurately transmitted to the conventional direct current unit and the flexible direct current unit, and the hybrid power transmission control protection device can be ensured to timely control and protect the hybrid power transmission system, so that the safe operation of a power grid is improved.
In a first embodiment of the present invention, as shown in FIG. 1, an RTDS modeling workstation includes: the processor board card is used for carrying out simulation processing on the hybrid transmission system and obtaining alternating current analog quantity and direct current analog quantity; and the analog quantity output board card is connected with the processor board card signal and receives and outputs alternating current analog quantity and direct current analog quantity. Specifically, the processor board card of the RTDS modeling workstation is preferably a board card PB5, and the analog output board card is preferably a board card GTAO; the board PB5 can be used for processing various complex power transmission system models and high-strength multi-node circuit checking calculation, and the board GTAO is used for multipath high-precision analog quantity output.
With continued reference to fig. 1, since the RTDS modeling workstation separately transmits an ac analog quantity and a dc analog quantity, and the ac analog quantity and the dc analog quantity have different technical characteristics, in the first embodiment of the present invention, different transmission media are correspondingly selected according to the different technical characteristics of the transmission analog quantity, and specifically, the processor board card and the analog quantity output board card are connected by signals through the optical fiber 4; the interface conversion device is connected with the analog output board card, the interface conversion device is connected with the conventional direct current unit and the flexible direct current unit through cable signals; the analog output board card is connected with the photoelectric conversion device through a wire, and the photoelectric conversion device is connected with the conventional direct current unit and the flexible direct current unit through optical fiber signals.
As shown in fig. 2, in the analog transmission system of the hybrid power transmission control protection device provided in the second embodiment of the present invention, for convenience in wiring of the analog transmission system, preferably, the number of interface conversion devices is two, where one interface conversion device is respectively connected with an analog output board card and a conventional dc unit signal, and the other interface conversion device is respectively connected with the analog output board card and a flexible dc unit signal; the number of the photoelectric conversion devices is two, one photoelectric conversion device is respectively connected with the analog output board card and the conventional direct current unit in a signal manner, and the other photoelectric conversion device is respectively connected with the analog output board card and the flexible direct current unit in a signal manner. Two interface conversion devices and two photoelectric conversion devices are selected, so that the conventional direct current unit is respectively connected with one interface conversion device and one photoelectric conversion device in a signal manner, and the flexible direct current unit is respectively connected with one interface conversion device and one photoelectric conversion device in a signal manner, thereby reducing overlapping wiring of transmission lines and facilitating wiring.
In the second embodiment of the present invention, in order to reduce interference between ac analog quantities or different types of analog quantities in dc analog quantities, the interface conversion device and the analog quantity output board card are connected by signals through a DB37 cable 1, and the interface conversion device and the conventional dc unit, and the interface conversion device and the flexible dc unit are connected by signals through a DB78 cable 3. The DB37 cable 1 is internally provided with 16 signal channels, the DB78 cable 3 is internally provided with 48 signal channels, and different analog quantities are transmitted through different signal channels, so that signal interference can be effectively avoided.
According to different running conditions of different power transmission systems, the specific types and the number of the alternating current analog quantity and the direct current analog quantity which need to be output after RTDS real-time simulation are different, so in the second embodiment of the invention, one end of each interface conversion device is respectively connected with an analog quantity output board card through 3 DB37 cables 1 according to the types and the number of the alternating current analog quantity and the direct current analog quantity which are required by a conventional direct current unit and a flexible direct current unit; and in the two interface conversion devices, the other end of one interface conversion device is in signal connection with a conventional direct current unit through 1 DB78 cable 3, and the other end of the other interface conversion device is in signal connection with a flexible direct current unit through 1 DB78 cable 3. In the second embodiment, since the types and the number of the analog quantities required by the conventional dc unit are more than those of the flexible dc unit, the interface conversion device is connected with the conventional dc unit through 1 DB78 cable 3 in a signal manner, so that the analog quantity transmission required by the conventional dc unit can be satisfied, and when the other interface conversion device is connected with the flexible dc unit through 1 DB78 cable 3 in a signal manner, there is an unnecessary idle channel in addition to the analog quantity transmission required by the flexible dc unit.
In order to facilitate the coordination control of the conventional dc unit and the flexible dc unit, on the basis of the analog quantity transmission system of the hybrid power transmission control protection device provided in the second embodiment, the hybrid power transmission control protection device further includes a coordination control unit, the coordination control unit is connected with the interface conversion device through a cable signal, and the coordination control unit is connected with the conventional dc unit and the flexible dc unit through optical fiber signals respectively. Preferably, in the second embodiment, when the interface conversion device is in signal connection with the flexible dc unit through 1 DB78 cable 3, there are redundant idle channels, and the analog quantity required by the coordination control unit is an ac analog quantity, and the number of the analog quantities is small, so that the coordination control unit and the flexible dc unit can share 1 DB78 cable 3, and receive the ac analog quantity output by the interface conversion device through different signal channels; the coordination control unit transmits signals with the conventional direct current unit and the flexible direct current unit through optical fibers, has higher transmission rate in the long-distance transmission process, and can facilitate data exchange; in addition, the coordination control unit can send control instructions to coordinate and control the conventional direct current unit and the flexible direct current unit according to actual needs, such as power distribution adjustment and the like between the conventional direct current unit and the flexible direct current unit, and safe operation of a power grid is facilitated.
In order to facilitate control and protection of a hybrid power transmission system having a conventional dc unit and a flexible dc unit, in a second embodiment provided by the present invention, the conventional dc unit specifically includes a conventional dc control device and a conventional dc protection device, and the flexible dc unit specifically includes a flexible dc control device and a flexible dc protection device; the conventional direct current control device is respectively connected with the interface conversion device, the photoelectric conversion device and the coordination control unit in a signal way, and the conventional direct current protection device is also respectively connected with the interface conversion device, the photoelectric conversion device and the coordination control unit in a signal way; the flexible direct current control device is respectively connected with the interface conversion device, the photoelectric conversion device and the coordination control unit in a signal way, and the flexible direct current protection device is also respectively connected with the interface conversion device, the photoelectric conversion device and the coordination control unit in a signal way. In the embodiment, the control part and the protection part in the conventional direct current unit and the flexible direct current unit are separated and independently arranged as the control device and the protection device, so that analog quantities required by the control device and the protection device can be separately transmitted, disorder of analog quantity transmission is avoided, and independent regulation and control are facilitated. The control devices in the conventional direct current unit and the flexible direct current unit can control the hybrid power transmission system according to the received analog quantity, so that weak links in the hybrid power transmission system are adjusted, and the operation stability of a power grid is improved; the protection devices in the conventional direct current unit and the flexible direct current unit can protect the hybrid power transmission system according to the received analog quantity, and the operation safety of the power grid is improved.
It should be noted that, the specific types of ac analog quantity and dc analog quantity output by the analog quantity output board card should depend on the specific power transmission system of RTDS real-time simulation, and those skilled in the art can select and set the output according to the specific situation and experience of the power transmission system.
In the analog quantity transmission system of the hybrid power transmission control protection device provided in the second embodiment, the ac analog quantity output by the board card GTAO to the conventional dc control device through the interface conversion device specifically includes a three-phase voltage on the converter transformer network side, a three-phase current on the converter transformer Y/Y valve side, a three-phase current on the converter transformer Y/D valve side, and the like. The board card GTAO outputs the alternating current analog quantity which is output to the conventional direct current protection device through the interface conversion device and specifically comprises three-phase current of a converter transformer Y/Y valve side, three-phase current of a converter transformer Y/D valve side and the like. The board card GTAO outputs the same alternating current analog quantity to the flexible direct current control device and the flexible direct current protection device through the interface conversion device, and specifically comprises a converter transformer network side three-phase voltage, a converter transformer network side three-phase current, a converter transformer valve side three-phase voltage, a converter transformer valve side three-phase current and the like. The board card GTAO outputs the alternating current analog quantity which is output to the coordination control unit through the interface conversion device and specifically comprises three-phase voltages of a large group of buses of the filter, three-phase voltages of a converter transformer network side and the like.
In the analog quantity transmission system of the hybrid power transmission control protection device provided in the second embodiment, the direct current analog quantity output by the board card GTAO to the conventional direct current control device through the photoelectric conversion device is the same as the direct current analog quantity output to the conventional direct current protection device, and specifically includes a positive direct current voltage, a negative direct current voltage, a positive direct current, a negative direct current, a neutral point grounding direct current, a direct current magnetic bias current, and the like. The direct current analog quantity of the board card GTAO which is output to the flexible direct current control device through the photoelectric conversion device is the same as the direct current analog quantity which is output to the flexible direct current protection device, and the board card GTAO specifically comprises positive direct voltage, negative direct voltage, positive direct current, negative direct current, neutral point current at the connecting variable valve side, neutral point current at the connecting variable network side and the like.
It should be noted that, if the hybrid power transmission system only operates a conventional dc system or a flexible dc system in the hybrid power transmission system, the analog transmission system provided in the first embodiment or the second embodiment of the present invention may still be used for analog transmission: when a conventional direct current system in the hybrid power transmission system is operated singly, the analog quantity transmission line from the RTDS modeling workstation to the conventional direct current unit runs normally, and the analog quantity transmission line from the RTDS modeling workstation to the flexible direct current unit is in an idle state; when the flexible direct current system in the hybrid power transmission system is operated singly, the analog quantity transmission line from the RTDS modeling workstation to the flexible direct current unit operates normally, and the analog quantity transmission line from the RTDS modeling workstation to the conventional direct current unit is in an idle state.
The embodiment of the invention also provides an analog quantity transmission method of the hybrid power transmission control protection device, which comprises the following steps:
step one, an RTDS modeling workstation simulates a hybrid power transmission system with a conventional direct current unit and a flexible direct current unit, outputs an alternating current analog quantity to an interface conversion device and outputs a direct current analog quantity to a photoelectric conversion device;
step two, after receiving the alternating current analog quantity output by the RTDS modeling workstation, the interface conversion device outputs the alternating current analog quantity to the conventional direct current unit and the flexible direct current unit respectively; and after receiving the direct current analog quantity output by the RTDS modeling workstation, the photoelectric conversion device outputs the direct current analog quantity to the conventional direct current unit and the flexible direct current unit respectively.
Specifically, the RTDS modeling workstation comprises a processor board card and an analog output board card which is in signal connection with the processor board card; the first step specifically comprises the following steps: the processor board card simulates the hybrid power transmission system to obtain an alternating current analog quantity and a direct current analog quantity; the analog quantity output board card receives the alternating current analog quantity and the direct current analog quantity obtained by the processor board card, outputs the alternating current analog quantity to the interface conversion device, and outputs the direct current analog quantity to the photoelectric conversion device.
In the analog quantity transmission method of the hybrid power transmission control protection device provided by the embodiment of the invention, aiming at different analog quantities output by an RTDS modeling workstation, the analog quantity to be transmitted is precisely transmitted to a conventional direct current unit and a flexible direct current unit by adopting a transmission mode of isolated transmission, so that the hybrid power transmission control protection device is used for controlling and protecting a hybrid power transmission system in time, and the safe operation of a power grid is improved.
When the analog quantity transmission system provided by the embodiment of the invention is used for transmitting analog quantity, the analog quantity transmission is specifically characterized in that an analog quantity output board outputs alternating current analog quantity to an interface conversion device through a cable, and the interface conversion device outputs the alternating current analog quantity to a conventional direct current unit and a flexible direct current unit through the cable respectively; the analog output board card outputs the direct current analog to the photoelectric conversion device through the lead, and the photoelectric conversion device outputs the direct current analog to the conventional direct current unit and the flexible direct current unit through the optical fiber.
When the analog quantity transmission system provided by the second embodiment of the invention is used for transmitting analog quantity, the number of the interface conversion devices and the number of the photoelectric conversion devices are two, and the analog quantity transmission is specifically characterized in that an analog quantity output board card outputs alternating current analog quantity to a conventional direct current unit through one interface conversion device, and the analog quantity output board card outputs alternating current analog quantity to a flexible direct current unit and a coordination control unit through the other interface conversion device; the analog output board card outputs the direct current analog quantity to the conventional direct current unit through one photoelectric conversion device, and the analog output board card outputs the direct current analog quantity to the flexible direct current unit through the other photoelectric conversion device.
It should be noted that, if the conventional dc system or the flexible dc system is only operated in a single hybrid power transmission system of conventional dc and flexible dc, the analog transmission system provided in the first embodiment or the second embodiment of the present invention may still be used to perform analog transmission, where the analog transmission method specifically includes:
when a conventional direct current system in a hybrid power transmission system is operated singly, the RTDS modeling workstation simulates the conventional direct current system in real time, and an analog quantity transmission line from the RTDS modeling workstation to a conventional direct current unit operates normally: the alternating current analog quantity is output to the conventional direct current unit through the interface conversion device, and the direct current analog quantity is output to the conventional direct current unit through the photoelectric conversion device; the analog transmission line from the RTDS modeling workstation to the flexible dc unit is in an idle state.
When the flexible direct current system in the hybrid power transmission system is operated singly, the RTDS modeling workstation simulates the flexible direct current system in real time, and the analog quantity transmission line from the RTDS modeling workstation to the flexible direct current unit operates normally: the alternating current analog quantity is output to the flexible direct current unit through the interface conversion device, and the direct current analog quantity is output to the flexible direct current unit through the photoelectric conversion device; the analog transmission lines of the RTDS modeling workstation to the conventional dc unit are in an idle state.
In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. An analog quantity transmission system of a hybrid power transmission control protection device, comprising: the system comprises an interface conversion device, a photoelectric conversion device, a conventional direct current unit, a flexible direct current unit and an RTDS modeling workstation for outputting alternating current analog quantity and direct current analog quantity; wherein the RTDS modeling workstation comprises:
the processor board card is used for carrying out simulation processing on the hybrid transmission system and obtaining the alternating current analog quantity and the direct current analog quantity;
the analog quantity output board card is connected with the processor board card through signals, and receives and outputs the alternating current analog quantity and the direct current analog quantity;
the interface conversion device is respectively connected with the RTDS modeling workstation, the conventional direct current unit and the flexible direct current unit in a signal manner; the interface conversion device receives the alternating current analog quantity output by the RTDS modeling workstation and outputs the alternating current analog quantity to the conventional direct current unit and the flexible direct current unit respectively; one end of each interface conversion device is connected with an analog output board card through 3 DB37 cables (1) respectively; one of the two interface conversion devices is connected with a conventional direct current unit through 1 DB78 cable (3) in a signal manner, and the other end of the other interface conversion device is connected with a flexible direct current unit through 1 DB78 cable (3) in a signal manner; the analog quantity output board card is a board card GTAO, and the board card GTAO outputs an alternating current analog quantity to a conventional direct current control device through an interface conversion device, wherein the alternating current analog quantity comprises a converter transformer network side three-phase voltage, a converter transformer network side three-phase current, a converter transformer Y/Y valve side three-phase current and a converter transformer Y/D valve side three-phase current;
the photoelectric conversion device is respectively connected with the RTDS modeling workstation, the conventional direct current unit and the flexible direct current unit in a signal manner; the photoelectric conversion device receives the direct current analog quantity output by the RTDS modeling workstation and outputs the direct current analog quantity to the conventional direct current unit and the flexible direct current unit respectively.
2. The analog quantity transmission system of the hybrid transmission control protection device according to claim 1, wherein the processor board card and the analog quantity output board card are connected through optical fiber signals;
the interface conversion device is connected with the analog output board card, the interface conversion device is connected with the conventional direct current unit and the flexible direct current unit through cable signals;
the analog output board card is connected with the photoelectric conversion device through a wire, and the photoelectric conversion device is connected with the conventional direct current unit and the flexible direct current unit through optical fiber signals.
3. The analog quantity transmission system of a hybrid transmission control and protection device according to claim 2, wherein,
the number of the interface conversion devices is two, one interface conversion device is respectively connected with the analog output board card and the conventional direct current unit through signals, and the other interface conversion device is respectively connected with the analog output board card and the flexible direct current unit through signals;
the number of the photoelectric conversion devices is two, one photoelectric conversion device is respectively connected with the analog output board card and the conventional direct current unit in a signal manner, and the other photoelectric conversion device is respectively connected with the analog output board card and the flexible direct current unit in a signal manner.
4. The analog quantity transmission system of a hybrid transmission control and protection device according to claim 1, wherein the conventional dc unit includes a conventional dc control device and a conventional dc protection device, and the flexible dc unit includes a flexible dc control device and a flexible dc protection device; wherein,
the conventional direct current control device is respectively in signal connection with the interface conversion device and the photoelectric conversion device, and the conventional direct current protection device is respectively in signal connection with the interface conversion device and the photoelectric conversion device;
the flexible direct current control device is respectively connected with the interface conversion device and the photoelectric conversion device in a signal way, and the flexible direct current protection device is respectively connected with the interface conversion device and the photoelectric conversion device in a signal way.
5. The analog quantity transmission method of the hybrid power transmission control protection device is characterized by comprising the following steps of:
step one, an RTDS modeling workstation simulates a hybrid power transmission system with a conventional direct current unit and a flexible direct current unit, outputs an alternating current analog quantity to an interface conversion device and outputs a direct current analog quantity to a photoelectric conversion device; the RTDS modeling workstation comprises a processor board card and an analog output board card which is in signal connection with the processor board card;
the first step specifically comprises the following steps:
the processor board card simulates the hybrid power transmission system to obtain the alternating current analog quantity and the direct current analog quantity;
the analog quantity output board card receives the alternating current analog quantity and the direct current analog quantity obtained by the processor board card, outputs the alternating current analog quantity to the interface conversion device, and outputs the direct current analog quantity to the photoelectric conversion device;
step two, after receiving the alternating current analog quantity output by the RTDS modeling workstation, the interface conversion device outputs the alternating current analog quantity to a conventional direct current unit and a flexible direct current unit respectively; the photoelectric conversion device receives the direct current analog quantity output by the RTDS modeling workstation and then outputs the direct current analog quantity to the conventional direct current unit and the flexible direct current unit respectively; one end of each interface conversion device is connected with an analog output board card through 3 DB37 cables (1) respectively; one of the two interface conversion devices is connected with a conventional direct current unit through 1 DB78 cable (3) in a signal manner, and the other end of the other interface conversion device is connected with a flexible direct current unit through 1 DB78 cable (3) in a signal manner; the analog output board card is a board card GTAO, and the board card GTAO outputs an alternating current analog to a conventional direct current control device through an interface conversion device, wherein the alternating current analog comprises a converter transformer network side three-phase voltage, a converter transformer network side three-phase current, a converter transformer Y/Y valve side three-phase current and a converter transformer Y/D valve side three-phase current.
6. The method for analog transmission of a hybrid transmission control and protection device according to claim 5, wherein,
the analog output board is connected with the interface conversion device through a cable, and the interface conversion device outputs the alternating analog to the conventional direct current unit and the flexible direct current unit through the cable respectively;
the analog output board is connected with the lead to output the direct current analog to the photoelectric conversion device, and the photoelectric conversion device outputs the direct current analog to the conventional direct current unit and the flexible direct current unit through optical fibers.
7. The method for analog transmission of a hybrid transmission control and protection device according to claim 6, wherein,
the number of the interface conversion devices is two, the analog output board card outputs the alternating current analog quantity to the conventional direct current unit through one interface conversion device, and the analog output board card outputs the alternating current analog quantity to the flexible direct current unit through the other interface conversion device;
the number of the photoelectric conversion devices is two, the analog quantity output board card outputs the direct current analog quantity to the conventional direct current unit through one photoelectric conversion device, and the analog quantity output board card outputs the direct current analog quantity to the flexible direct current unit through the other photoelectric conversion device.
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