CN210181137U - Flexible direct current transmission control protection real-time simulation device - Google Patents
Flexible direct current transmission control protection real-time simulation device Download PDFInfo
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Abstract
The application discloses flexible direct current transmission control protection real-time simulation device includes: the operation and maintenance operation module, the control protection device, the real-time simulator and the protection setting module are arranged independently; this application sets up fortune dimension operation module and can show control protection device's operating condition to fortune dimension personnel through operation interface, be convenient for fortune dimension personnel master control protection device's operating condition, carry out the maintenance of pertinence, fortune dimension personnel can also carry out real-time settlement and control to the protect function in the control protection device through the protection module of setting, make the protect function in the control protection device can dynamic adjustment, it is convenient to make the control protection device maintain, utilize real-time simulator to replace real AC/DC side circuit, avoided leading to the fact the potential safety hazard to real AC/DC side when testing control protection device, and simultaneously, real-time simulator is convenient for connect and use, be convenient for debug control protection device.
Description
Technical Field
The utility model relates to a flexible direct current transmission of electricity field, in particular to flexible direct current transmission of electricity control protection real-time simulation device.
Background
Flexible dc power transmission is a new type of power transmission technology based on voltage source converters, self-turn-off devices and Pulse Width Modulation (PWM) technology. Compared with the traditional direct-current transmission technology, the flexible direct-current transmission technology has the advantages of being capable of supplying power to a passive network, being free of phase change failure, being easy to form a multi-terminal direct-current system and the like, shows huge economic and technical advantages in application occasions such as wind power plant grid connection, asynchronous grid connection, power supply in cities, improvement of traditional direct-current operation characteristics and the like, is an important technical basis for building a direct-current power grid and developing an energy internet in the future, and is one of important development directions in the field of power transmission in the future.
The flexible direct current transmission control protection device is a core component of flexible direct current transmission and determines the basic functions, the operating characteristics, the dynamic response characteristics and the safety and reliability of a flexible direct current transmission system.
At present, the dynamic performance of a control protection system of flexible direct current transmission needs to be tested before the flexible direct current transmission is put into operation, and the untested flexible direct current transmission system possibly has design defects so as to influence a power grid; after the flexible direct current transmission system is put into operation, the faults and problems which actually appear on the site need to be simulated and reproduced, and the control protection device also needs to be accessed for testing.
Therefore, a flexible direct current transmission control protection real-time simulation system with comprehensive functions, simple wiring and convenience in testing is needed.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a flexible direct current transmission control protection real-time simulation device, the high-efficient test of the flexible direct current transmission of being convenient for. The specific scheme is as follows:
a flexible direct current transmission control protection real-time simulation device comprises: the operation and maintenance operation module, the control protection device, the real-time simulator and the protection setting module are arranged independently, the operation and maintenance operation module, the control protection device and the protection setting module are sequentially connected, and the real-time simulator is respectively connected with the operation and maintenance operation module and the control protection device;
the operation and maintenance operation module is used for displaying an operation interface of a control protection device, receiving a station alignment state signal and an alternating current and direct current field switch state signal sent by the real-time simulator, sending a control command signal to the control protection device, and sending an alternating current and direct current field switch control command to the real-time simulator;
the control protection device is used for receiving the control command signal, the protection control signal sent by the protection setting module, the converter valve state signal sent by the real-time simulator, the AC-DC flow field switch state signal and the measurement signal of the AC-DC side, and sending an action outlet signal and a trigger pulse signal for controlling the conduction of the converter valve to the real-time simulator;
the real-time simulator is used for simulating signals on an alternating current side and a direct current side to communicate with the control protection device, receiving the alternating current-direct current field switch control command, the trigger pulse signal and the action outlet signal, and sending the station alignment state signal, the alternating current-direct current field switch state signal, the measurement signal and the converter valve state signal;
and the protection setting module is used for sending the protection control signal to the control protection device.
Optionally, the control protection device includes: the system comprises a station control module, an unlocking and locking control module, a measurement signal processing module, a power control module, a current amplitude limiting control module, a current inner ring control module, a converter valve control module and a fault protection module which are arranged independently;
the station control module is used for receiving the control command signal, the AC/DC field switch state signal and the unlocking signal sent by the unlocking control module; sending a power control signal and a control mode selection signal to the power control module; sending a converter station running state signal to the current amplitude limiting control module; sending an unlocking control signal to the unlocking control module;
the unlocking and locking control module is used for receiving an alternating current and direct current field switch state signal, an unlocking and locking control signal sent by the station control module, a fault characteristic signal sent by the fault protection module and an action outlet signal; sending the unblocking signal to the station control module, the converter valve control module and the power control module;
the measurement signal processing module is used for receiving the measurement signal and sending an alternating current/direct current signal to the fault protection module and the power control module;
the power control module is configured to receive the power control signal, the control mode selection signal, the ac/dc signal, the fault characteristic signal, and the deblocking signal, and send a current reference signal to the current amplitude limiting control module;
the current amplitude limiting control module is used for receiving the converter station running state signal, the current reference signal and the fault characteristic signal and sending a current reference value signal to the current inner loop control module;
the current inner loop control module is used for receiving the current reference value signal and the alternating current/direct current signal and sending a modulation wave signal to the converter valve control module;
the converter valve control module is used for receiving the modulation wave signal, the unblocking signal and a converter valve state signal fed back by a converter valve and sending a trigger pulse signal for controlling the conduction of the converter valve;
the fault protection module is used for receiving the alternating current and direct current signals and the protection control signals sent by the protection setting module, sending the fault characteristic signals to the power control module, the unlocking module and the current amplitude limiting control module, and sending the action outlet signals to the unlocking controller and the real-time simulator.
Optionally, the fault protection module includes an ac fault detection module and a protection module;
the alternating current fault detection module is used for receiving the alternating current and direct current signals and sending the fault characteristic signals to the protection module, the power control module, the unlocking module and the current amplitude limiting control module;
and the protection module is used for receiving the protection control signal, the alternating current and direct current signal and the fault characteristic signal and sending the action outlet signal to the unlocking and locking controller and the real-time simulator.
Optionally, the system further comprises a warning module connected with the alternating current fault detection module;
and the warning module is used for receiving the fault characteristic signal and displaying prompt information corresponding to the fault characteristic signal.
Optionally, the power control module includes an active power control module and a reactive power control module;
the active power control module is configured to receive an active power control signal in the power control signal, an active control mode selection signal in the control mode selection signal, the ac/dc signal, the fault characteristic signal, and the deblocking signal, and send an active current reference signal in the current reference signal to the current amplitude limiting control module;
the reactive power control module is configured to receive a reactive power control signal in the power control signal, a reactive control mode selection signal in the control mode selection signal, the ac/dc signal, the fault characteristic signal, and the deblocking signal, and send a reactive current reference signal in the current reference signal to the current amplitude limiting control module.
Optionally, the active power control module includes: the device comprises an active power control module, a direct current voltage control module and an active current control mode selection module;
the active power control module is configured to receive an active power reference signal, the ac/dc signal, and the unblocking signal in the active power control signal, and send a first active current reference signal to the active current control mode selection module;
the direct-current voltage control module is configured to receive a direct-current voltage reference signal, the alternating-current/direct-current signal, and the unblocking signal in the active power control signal, and send a second active current reference signal to the active current control mode selection module;
the active current control mode selection module is used for receiving the first active current reference signal, the second active current reference signal, the active control mode selection signal and the fault characteristic signal, and sending the active current reference signal to the current amplitude limiting control module.
Optionally, the reactive power control module includes: the control system comprises a reactive power control module, a direct current voltage control module and a reactive current control mode selection module;
the reactive power control module is used for receiving a reactive power reference signal, the alternating current/direct current signal and the unblocking signal in the reactive power control signal and sending a first reactive current reference signal to the reactive current control mode selection module;
the direct-current voltage control module is configured to receive a direct-current voltage reference signal, the alternating-current/direct-current signal, and the unblocking signal in the reactive power control signal, and send a second reactive current reference signal to the reactive current control mode selection module;
the reactive current control mode selection module is used for receiving the first reactive current reference signal, the second reactive current reference signal, the reactive control mode selection signal and the fault characteristic signal and sending the reactive current reference signal to the current amplitude limiting control module.
The utility model discloses in, flexible direct current transmission protection device, include: the operation and maintenance operation module, the control protection device, the real-time simulator and the protection setting module are arranged independently, the operation and maintenance operation module, the control protection device and the protection setting module are sequentially connected, and the real-time simulator is respectively connected with the operation and maintenance operation module and the control protection device; the operation and maintenance operation module is used for displaying an operation interface of the control protection device, receiving a station alignment state signal and an AC-DC field switch state signal sent by the real-time simulator, sending a control command signal to the control protection device, and sending an AC-DC field switch control command to the real-time simulator; the control protection device is used for receiving a control command signal, a protection control signal sent by the protection setting module, a converter valve state signal sent by the real-time simulator, an alternating current-direct current field switch state signal and a measurement signal at an alternating current side and a direct current side, and sending an action outlet signal and a trigger pulse signal for controlling the conduction of the converter valve to the real-time simulator; the real-time simulator is used for simulating the communication of signals on the AC-DC side and the control protection device, receiving an AC-DC flow field switch control command, a trigger pulse signal and an action outlet signal, and sending a station alignment state signal, an AC-DC flow field switch state signal, a measurement signal and a converter valve state signal; and the protection setting module is used for sending a protection control signal to the control protection device.
The utility model discloses it can show control protection device's operating condition to fortune dimension personnel to set up fortune dimension operation module through operation interface, the operation of being convenient for dimension personnel master control protection device's operating condition, carry out the maintenance of pertinence, fortune dimension personnel can also carry out real-time settlement and control to the protect function in the control protection device through the module of setting of protection, make the protect function in the control protection device can dynamic adjustment, it is convenient to make the control protection device maintain, utilize real-time simulator to replace real friendship straight side circuit, avoided leading to the fact the potential safety hazard to real friendship straight side when testing control protection device, and simultaneously, real-time simulator is convenient for connect and use, be convenient for debug control protection device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural view of a flexible dc power transmission control protection real-time simulation apparatus disclosed in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another flexible dc power transmission control protection real-time simulation apparatus disclosed in the embodiment of the present invention;
fig. 3 is a schematic structural view of another flexible dc power transmission control protection real-time simulation apparatus disclosed in the embodiment of the present invention;
fig. 4 is a schematic structural diagram of another flexible dc power transmission control protection real-time simulation apparatus disclosed in the embodiment of the present invention;
fig. 5 is a schematic structural view of another flexible dc power transmission control protection real-time simulation apparatus disclosed in the embodiment of the present invention;
fig. 6 is a schematic structural view of another flexible dc power transmission control protection real-time simulation apparatus disclosed in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model discloses flexible direct current transmission control protection real-time simulation device, it is shown with reference to figure 1, the device includes: the operation and maintenance control system comprises an operation and maintenance operation module 11, a control protection device 12, a real-time simulator 14 and a protection setting module 13 which are arranged independently, wherein the operation and maintenance operation module 11, the control protection device 12 and the protection setting module 13 are sequentially connected, and the real-time simulator 14 is respectively connected with the operation and maintenance operation module 11 and the control protection device 12;
the operation and maintenance operation module 11 is configured to display an operation interface of the control protection device 12, receive an opposite station status signal S0 and an ac/dc field switch status signal S2 sent by the real-time simulator 14, send a control command signal S1 to the control protection device 12, and send an ac/dc field switch control command S45 to the real-time simulator 14.
Specifically, the operation and maintenance operation module 11 is used for simulating an operation interface of an actual flexible direct current power transmission system, so that operation and maintenance personnel can issue instructions according to the operation interface, and meanwhile, various working parameters of the flexible direct current converter station can be displayed, and the operation and maintenance personnel can perform targeted maintenance more conveniently and rapidly through various parameters displayed by the operation interface.
It can be understood that in practical applications, a plurality of flexible dc converter stations may be operated in parallel, and each flexible dc converter station may output a dc current together, and therefore, when the converter valves are adjusted, the working condition of each flexible dc converter station needs to be considered, and therefore, the operation and maintenance operation module 11 is further configured to receive a flexible dc converter station-to-station status signal S0, that is, the flexible dc converter station related to the current flexible dc converter station, so as to jointly make a control command signal S1 to control the conduction time of the converter valve of the protection device 12.
Furthermore, since the ac-dc side is simulated by the real-time simulator, the operation and maintenance personnel can send an ac-dc field switch control command S45 to the real-time simulator 14 through the operation and maintenance operation module 11 to control the working state of the real-time simulator, control whether the real-time simulator continues to simulate the ac-dc field, and control the real-time simulator 14 to close the ac-dc field.
And the control protection device 12 is configured to receive the control command signal S1 and a protection control signal S43 sent by the protection setting module 13, and control the converter valve to be turned on.
The real-time simulator is used for simulating signals on an alternating current side and a direct current side to communicate with the control protection device, receiving the alternating current-direct current field switch control command, the trigger pulse signal and the action outlet signal, and sending the station alignment state signal, the alternating current-direct current field switch state signal, the measurement signal S33 and the converter valve state signal.
Specifically, the real-time simulator 14 is configured to simulate various signals of the ac-dc side connected to the control protection device 12, for example, various signals of the simulated converter valve and its related signals, a measurement signal S33 of the ac-dc side that the simulation control protection device 12 needs to obtain, and a measurement signal S33 of the ac-dc side includes three-phase ac voltage, ac current, dc voltage, and the like, so as to realize a one-time ac/dc test, facilitate the test, and avoid the control protection device to be tested from being connected to a real ac-dc test, thereby avoiding the potential safety hazard of the control protection device to be tested to the ac-dc side.
And the protection setting module 13 is configured to send a protection control signal S43 to the control protection device 12.
Specifically, the protection setting module 13 sends a protection control signal S43 to the control protection device 12, and is used to control the switching in and out of the protection function in the control protection device 12, and modify and set the protection setting value, so as to implement setting and control of the protection function in the control protection device 12.
The protection control signal S43 sent by the protection setting module 13 may be input by an operation and maintenance person through a corresponding input interface or input through the operation and maintenance operation module 11.
It can be understood that the connection relationship between each module and each device is consistent with the signal transmission relationship, each module and each device are correspondingly connected through a communication interface and a communication line, meanwhile, each module is an independent board card with mutually independent function modules, each board card is correspondingly connected through the communication interface and the communication line, and each board card can independently carry out device replacement and program debugging according to an application scene.
It can be seen, the embodiment of the utility model provides a set up fortune dimension operating module 11 and can show the operating condition of control protection device 12 to fortune dimension personnel through operation interface, be convenient for fortune dimension personnel master the operating condition of control protection device 12, carry out the maintenance of pertinence, fortune dimension personnel can also carry out real-time settlement and control to the protect function in the control protection device 12 through protection setting module 13, make protect function in the control protection device 12 can the dynamic adjustment, it is convenient to make the control protection device 12 maintain, utilize real-time simulator 14 to replace real friendship straight side circuit, avoided leading to the fact the potential safety hazard to real friendship straight side when testing control protection device 12, and simultaneously, real-time simulator 14 is convenient for connect and use, be convenient for debug control protection device 12.
It will be appreciated that the converter valves 9 described above are virtual devices simulated in the real-time simulator 14.
The embodiment of the utility model discloses specific flexible direct current transmission protection device, for last embodiment, further explanation and optimization have been made to technical scheme to this embodiment. Specifically, the method comprises the following steps:
specifically, referring to fig. 2, the control protection device 12 may include a station control module 1, an unlocking control module 2, a measurement signal processing module 3, a power control module 4, a current limiting control module 5, a current inner loop control module 6, a converter valve control module 7, and a fault protection module 8, which are independently arranged;
the station control module 1 is configured to receive an input control command signal S1, an ac/dc field switch state signal S2, and an unblocking signal S31 sent by the unblocking control module 2; generating and transmitting a power control signal S50 and a control mode selection signal S51 to the power control module 4 by using the control command signal S1, the AC/DC field switch state signal S2 and the unblocking signal S31; sending a converter station running state signal S40 to the current amplitude limiting control module 5; an unblocking control signal S30 is sent to the unblocking control module 2.
Specifically, the station control module 1 is configured to control a control mode and a command of the entire flexible dc converter station, and includes issuing control mode signals such as a STATCOM control mode, a power forward-transmission backward-transmission, a black-start control mode, and a converter station operation state signal S40.
The station operating status signal S40 includes various information such as the state of unblocking, the direction of power transmission, the control mode, etc.
The unlocking control module 2 is used for receiving an alternating current and direct current field switch state signal S2, an unlocking control signal S30 sent by the station control module 1, a fault characteristic signal S36 sent by the fault protection module 8 and an action outlet signal S37; and sending an unblocking signal S31 to the station control module 1, the converter valve control module 7 and the power control module 4.
Specifically, the unlocking and locking control module 2 controls unlocking and locking of the whole flexible direct current converter station according to an alternating current field state obtained from the alternating current and direct current field switch state signal S2, the station control instruction unlocking and locking control signal S30, the fault characteristic signal S36 and the protection module action information action exit signal S37, and transmits unlocking and locking information to the corresponding modules, so that the modules change working states according to the unlocking and locking information, and finally unlocking or locking is achieved.
For example, if the information recorded in the unblocking signal S31 received by the power control module 4 is blocking, the power control module 4 may decrease the power, gradually bring the control protection device 12 into the blocking state, and finally block, and after the power control module 4 is closed, the information recorded in the received unblocking signal S31 is blocking, the power control module 4 starts up, and gradually generates the corresponding current reference signal S52 according to the start rule, so that the flexible dc converter station gradually enters the working state.
And the measurement signal processing module 3 is used for receiving and utilizing the measurement signal S33 sent by the real-time simulator 14, and generating and sending an alternating current signal S34 to the fault protection module and the power control module 4.
And the power control module 4 is configured to receive and use the power control signal S50, the control mode selection signal S51, the ac/dc signal S52, the fault characteristic signal S53, and the unblocking signal S31, and generate and send a current reference signal S52 to the current clipping control module 5.
Specifically, the power control module 4 calculates power information output by the flexible dc converter station according to signals sent by the modules, and outputs a current reference signal S52 for adjusting the on-time of the switching tube in the converter valve 9 to the current amplitude limiting control module 5 based on a negative feedback principle according to the output power information.
And the current amplitude limiting control module 5 is configured to receive and utilize the converter station operating state signal S40, the current reference signal S52 and the fault characteristic signal S23 to perform amplitude limiting on the current, and generate and send a current reference value signal S55 to the current inner loop control module 6.
Specifically, the current amplitude limiting control module 5 performs corresponding amplitude limiting on a current signal in the current reference signal S52 output by the power control module 4 according to different control modes and converter station operating states, where an amplitude limiting degree corresponds to the current mode, and the amplitude limiting module may perform amplitude limiting according to a pre-stored amplitude limiting calculation rule or a correspondence between the amplitude limiting and the current mode, so as to finally obtain the current reference value signal S55.
And the current inner loop control module 6 is used for receiving and utilizing the current reference value signal S55 and the alternating current/direct current signal S41 to perform negative feedback operation, and generating and sending a modulation wave signal to the converter valve control module 7.
Specifically, the current inner loop control module 6 is configured to control tracking control of output current of the converter station, and utilize a current reference value in the current reference value signal S55 and an actual feedback value to make a difference, and then adjust the difference through the proportional-integral regulator to obtain a modulated voltage signal, that is, a modulated wave signal, so as to implement dynamic tracking of an actual feedback value of power transmission.
And the converter valve control module 7 is used for receiving and utilizing the modulation wave signal, the unblocking signal S31 and the converter valve state signal S28 fed back by the converter valve 9, and generating and sending a trigger pulse signal S27 for controlling the conduction of the converter valve 9.
Specifically, before the converter valve 9 is controlled, a converter valve state signal S28 of the converter valve 9 needs to be acquired, so as to determine the current operating state of the converter valve 9, so as to control the converter valve 9 more accurately in the following, and by using the modulation wave signal, the unblocking signal S31 and the converter valve state signal S28, a trigger pulse signal S27 for controlling the conduction of the converter valve 9 is generated, so as to control the conduction time of the converter valve 9, so as to change the direct current output by the flexible direct current converter station.
The fault protection module 8 is configured to receive the ac/dc signal S34 and the protection control signal S43 sent by the protection setting module 13, send a fault feature signal S53 to the power control module 4, the unblocking control module 2, and the current amplitude limiting control module 5, and send an action exit signal S37 to the unblocking control module 2 and the real-time simulator 14.
It can be understood that, according to the ac/dc signal S34, the fault protection module 8 can analyze the working state of the ac/dc side to generate corresponding fault characteristic signals (S53, S36), and generate corresponding action exit signals S37 according to the fault characteristic signals (S53, S36) and the ac/dc signal S34, and after the generation, send the fault characteristic signals S53 to the power control module 4, the unlocking control module 2 and the current limiting control module 5, send the action exit signals S37 to the unlocking control module 2 and the real-time simulator 14, so that the modules perform corresponding actions according to the signals, for example, the unlocking control module 2 sends the unlocking signal S31 for enabling each module to enter into the locking state.
Further, the fault protection module 8 may set its own protection parameter by using the protection control signal S43, and generate the operation exit signal S37 after the parameter is changed, or may directly obtain the operation exit signal S37 corresponding to the changed parameter based on the protection control signal S43, and for example, may generate the operation exit signal S37 corresponding to the time of locking when the information in the protection control signal S43 is for locking, so as to lock the control protection device 12 and stop the output.
It can be understood that the connection relationship between each module and each device is consistent with the signal transmission relationship, each module and each device are correspondingly connected through a communication interface and a communication line, meanwhile, each module is an independent board card with mutually independent function modules, each board card is correspondingly connected through the communication interface and the communication line, and each board card can independently carry out device replacement and program debugging according to an application scene.
It will be appreciated that the converter valves 9 described above are virtual devices simulated in the real-time simulator 14.
Correspondingly, the embodiment of the utility model discloses a concrete flexible direct current transmission protection device, for last embodiment, further explanation and optimization have been made to technical scheme to this embodiment. Specifically, the method comprises the following steps:
specifically, referring to fig. 3, the fault protection module 8 may include an ac fault detection module 81 and a protection module 82;
and the alternating current fault detection module 81 is used for receiving and utilizing the alternating current and direct current signal S34, generating and sending fault characteristic signals (S35, S53, S36 and S23) to the protection module 82, the power control module 4, the unlocking control module 2 and the current amplitude limiting control module 5.
Specifically, the ac fault detection module 81 analyzes the fault characteristics of the current flexible dc conversion station according to the ac/dc signal S34, and further generates fault characteristic signals (S35, S53, S36, S23), and sends the fault characteristic signals (S35, S53, S36, S23) to the protection module 82, the power control module 4, the unlocking control module 2, and the current limiting control module 5, so that each module responds to the fault described in the current fault characteristic signal (S35, S53, S36, S23).
The protection module 82 is configured to receive and use the protection control signal S43, the ac/dc signal S32, and/or the fault signature signal S35, and generate and send an operation exit signal S37 to the unblocking control module 2.
Specifically, the protection module 82 determines whether to put the system into the locked state according to the severity of the ac/dc signal S32 and the fault characteristic signal S35, and stops the operation, and if the fault is severe and needs to be put into the locked state, the protection module 82 sends the operation exit signal S37 to the unlocking control module 2, so that the unlocking control module 2 sends the corresponding unlocking signal S31, and may set its own protection parameters according to the protection control signal S43, so as to generate the operation exit signal S37 after the parameters change, or of course, directly obtain the operation exit signal S37 corresponding to the protection control signal S43 according to the protection control signal S43, for example, if the information in the protection control signal S43 is to perform locking, the operation exit signal S37 corresponding to the time phase of locking may be generated, so as to control the protection device 12 to lock and stop the output.
Specifically, as shown in fig. 4, the system may further include an alarm module 10 connected to the ac fault detection module 81;
the warning module 10 is configured to receive and utilize the fault characteristic signal S35 to generate a prompt message, where the warning module 10 may be a display or a prompt light, and when the display is used, may display text, numbers and/or images corresponding to the fault characteristic signal to prompt a user of a current fault.
It will be appreciated that the power is divided into active power and reactive power, for which purpose the analysis can be performed separately by means of the active power module 41 and the reactive power module 42.
Specifically, referring to fig. 5, the power control module 4 may include an active power module 41 and a reactive power module 42;
an active power module 41, configured to receive and use an active power control signal S56 in the power control signal S50, an active control mode selection signal S38 in the control mode selection signal S51, an ac/dc signal S58, a fault characteristic signal S19, and an unblocking signal S31, to generate and send an active current reference signal S21 in the current reference signal S52 to the current clipping control module 5;
and the reactive power module 42 is configured to receive and use the reactive power control signal S57 in the power control signal S50, the reactive control mode selection signal S39 in the control mode selection signal S51, the ac/dc signal S59, the fault characteristic signal S20, and the unblocking signal S31 to generate and send the reactive current reference signal S22 in the current reference signal S52 to the current clipping control module 5.
Further, referring to fig. 6, the active power module 41 may include an active power control module 43, a dc voltage control module 44, and an active current control mode selection module 45;
and the active power control module 43 is configured to receive and utilize an active power reference signal S3 in the active power control signal S56, an active power feedback signal S11 in the ac/dc signal S58, and the unblocking signal S7, and generate and send a first active current reference signal S15 to the active current control mode selection module 45.
Specifically, the active power control module 43 is configured to perform active power tracking control, and obtain a first active current reference signal S15 through a proportional-integral regulator after a difference is made between a pre-stored power reference value and an actual feedback value, so as to implement dynamic tracking of the actual feedback value of the active power, where the actual feedback value is the active power feedback signal S11 in the ac/dc signal S58.
And the dc voltage control module 44 is configured to receive and utilize the dc voltage reference signal S4 in the active power control signal S56, the dc voltage feedback signal S12 in the ac/dc signal S58, and the deblocking signal S8, and generate and send a second active current reference signal S16 to the active current control mode selection module 45.
Specifically, the dc voltage control module 44 is configured to perform dc voltage tracking control, and obtain a first active current reference signal S15 through a proportional-integral regulator after a difference is made between a dc voltage reference value and an actual feedback value that are stored in advance, so as to achieve dynamic tracking of the actual feedback value of the dc voltage reference value, where the actual feedback value is a dc voltage feedback signal S12 in the ac/dc signal S58.
The active current control mode selection module 45 is configured to receive and utilize the first active current reference signal S15, the second active current reference signal S16, the active control mode selection signal S38, and the fault signature signal S19, select the first active current reference signal or the second active current reference signal as the active current reference signal S21, and send the active current reference signal S21 to the current clipping control module 5.
Specifically, the active current control mode selection module 45 is configured to select an active current control mode, select an active power control mode or a dc voltage control mode according to the active control mode selection signal S38 and the fault characteristic signal S19, select the first active current reference signal S15 or the second active current reference signal S16 as the active current reference signal S21, and send the active current reference signal S21 to the current clipping control module 5, for example, select the active power control mode, select the first active current reference signal S15 as the active current reference signal S21, and select the second active current reference signal S16 as the active current reference signal S21 if the dc voltage control mode is selected.
Further, referring to fig. 6, the reactive power module 42 may include a reactive power control module 46, an ac voltage control module 47, and a reactive current control mode selection module 48;
and the reactive power control module 46 is configured to receive and utilize the reactive power reference signal S5 in the reactive power control signal S57, the reactive power signal S13 in the ac/dc signal S59, and the unblocking signal S31, and generate and send the first reactive current reference signal S17 to the reactive current control mode selection module 48.
Specifically, the reactive power control module 46 is configured to perform reactive power tracking control, and obtain a first reactive current reference signal S17 through a proportional-integral regulator after a difference is made between a pre-stored reactive power reference value and an actual feedback value, so as to implement dynamic tracking of the actual feedback value of the reactive power, where the actual feedback value is the reactive power signal S13 in the ac/dc signal S59.
And the alternating voltage control module 47 is configured to receive and utilize the alternating voltage reference signal S6 in the reactive power control signal S57, the alternating voltage effective value signal S14 in the alternating current/direct current signal S59, and the deblocking signal S31, and generate and send a second reactive current reference signal S18 to the reactive current control mode selection module 48.
Specifically, the ac voltage control module 47 is configured to perform ac voltage tracking control, and obtain a first reactive current reference signal S17 through a proportional-integral regulator after subtracting a reference value of an ac voltage effective value and an actual feedback value stored in advance, so as to realize dynamic tracking of the actual feedback value of the ac voltage effective value, where the actual feedback value is the ac voltage effective value signal S14 in the ac/dc signal S59.
The reactive current control mode selection module 48 is configured to receive and utilize the first reactive current reference signal S17, the second reactive current reference signal S18, the reactive control mode selection signal S39, and the fault signature signal S20, select the first reactive current reference signal or the second reactive current reference signal as the reactive current reference signal S22, and send the reactive current reference signal S22 to the current slice control module 5.
Specifically, for the reactive current control mode selection, the reactive power control mode or the ac voltage control mode is selected according to the reactive control mode selection signal S39 and the fault characteristic signal S20, the first reactive current reference signal S17 or the second reactive current reference signal S18 is selected as the reactive current reference signal S22 to be sent to the current slice control module 5, for example, the first reactive current reference signal S17 is selected as the reactive current reference signal S22 when the reactive power control mode is selected, and the second reactive current reference signal S18 is selected as the reactive current reference signal S22 when the ac voltage control mode is selected.
Note that, the above-mentioned part of the signals are annotated with different reference numbers to correspond to the signals sent to different modules.
It can be understood that the connection relationship between each module and each device is consistent with the signal transmission relationship, each module and each device are correspondingly connected through a communication interface and a communication line, meanwhile, each module is an independent board card with mutually independent function modules, each board card is correspondingly connected through the communication interface and the communication line, and each board card can independently carry out device replacement and program debugging according to an application scene.
It will be appreciated that the converter valves 9 described above are virtual devices simulated in the real-time simulator 14.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides a flexible direct current transmission control protection real-time simulation device which characterized in that includes: the operation and maintenance operation module, the control protection device, the real-time simulator and the protection setting module are arranged independently, the operation and maintenance operation module, the control protection device and the protection setting module are sequentially connected, and the real-time simulator is respectively connected with the operation and maintenance operation module and the control protection device;
the operation and maintenance operation module is used for displaying an operation interface of a control protection device, receiving a station alignment state signal and an alternating current and direct current field switch state signal sent by the real-time simulator, sending a control command signal to the control protection device, and sending an alternating current and direct current field switch control command to the real-time simulator;
the control protection device is used for receiving the control command signal, the protection control signal sent by the protection setting module, the converter valve state signal sent by the real-time simulator, the AC-DC flow field switch state signal and the measurement signal of the AC-DC side, and sending an action outlet signal and a trigger pulse signal for controlling the conduction of the converter valve to the real-time simulator;
the real-time simulator is used for simulating signals on an alternating current side and a direct current side to communicate with the control protection device, receiving the alternating current-direct current field switch control command, the trigger pulse signal and the action outlet signal, and sending the station alignment state signal, the alternating current-direct current field switch state signal, the measurement signal and the converter valve state signal;
and the protection setting module is used for sending the protection control signal to the control protection device.
2. The flexible direct-current power transmission control protection real-time simulation device according to claim 1, wherein the control protection device comprises: the system comprises a station control module, an unlocking and locking control module, a measurement signal processing module, a power control module, a current amplitude limiting control module, a current inner ring control module, a converter valve control module and a fault protection module which are arranged independently;
the station control module is used for receiving the control command signal, the AC/DC field switch state signal and an unlocking signal sent by the unlocking control module; sending a power control signal and a control mode selection signal to the power control module; sending a converter station running state signal to the current amplitude limiting control module; sending an unlocking control signal to the unlocking control module;
the unlocking and locking control module is used for receiving an alternating current and direct current field switch state signal, an unlocking and locking control signal sent by the station control module, a fault characteristic signal sent by the fault protection module and an action outlet signal; sending the unblocking signal to the station control module, the converter valve control protection module and the power control module;
the measurement signal processing module is used for receiving the measurement signal and sending an alternating current/direct current signal to the fault protection module and the power control module;
the power control module is configured to receive the power control signal, the control mode selection signal, the ac/dc signal, the fault characteristic signal, and the deblocking signal, and send a current reference signal to the current amplitude limiting control module;
the current amplitude limiting control module is used for receiving the converter station running state signal, the current reference signal and the fault characteristic signal and sending a current reference value signal to the current inner loop control module;
the current inner loop control module is used for receiving the current reference value signal and the alternating current/direct current signal and sending a modulation wave signal to the converter valve control module;
the converter valve control module is used for receiving the modulation wave signal, the unblocking signal and a converter valve state signal fed back by a converter valve and sending a trigger pulse signal for controlling the conduction of the converter valve;
the fault protection module is used for receiving the alternating current and direct current signals and the protection control signals sent by the protection setting module, sending the fault characteristic signals to the power control module, the unlocking module and the current amplitude limiting control module, and sending the action outlet signals to the unlocking controller and the real-time simulator.
3. The flexible direct current power transmission control protection real-time simulation device according to claim 2, wherein the fault protection module comprises an alternating current fault detection module and a protection module;
the alternating current fault detection module is used for receiving the alternating current and direct current signals and sending the fault characteristic signals to the protection module, the power control module, the unlocking module and the current amplitude limiting control module;
and the protection module is used for receiving the protection control signal, the alternating current and direct current signal and the fault characteristic signal and sending the action outlet signal to the unlocking and locking controller and the real-time simulator.
4. The flexible direct current power transmission control protection real-time simulation device according to claim 3, further comprising an alarm module connected to the alternating current fault detection module;
and the warning module is used for receiving the fault characteristic signal and displaying prompt information corresponding to the fault characteristic signal.
5. The flexible direct current transmission control protection real-time simulation device according to any one of claims 2 to 4, wherein the power control module comprises an active power control module and a reactive power control module;
the active power control module is configured to receive an active power control signal in the power control signal, an active control mode selection signal in the control mode selection signal, the ac/dc signal, the fault characteristic signal, and the deblocking signal, and send an active current reference signal in the current reference signal to the current amplitude limiting control module;
the reactive power control module is configured to receive a reactive power control signal in the power control signal, a reactive control mode selection signal in the control mode selection signal, the ac/dc signal, the fault characteristic signal, and the deblocking signal, and send a reactive current reference signal in the current reference signal to the current amplitude limiting control module.
6. The flexible direct current power transmission control protection real-time simulation device according to claim 5, wherein the active power control module comprises: the device comprises an active power control module, a direct current voltage control module and an active current control mode selection module;
the active power control module is configured to receive an active power reference signal, the ac/dc signal, and the unblocking signal in the active power control signal, and send a first active current reference signal to the active current control mode selection module;
the direct-current voltage control module is configured to receive a direct-current voltage reference signal, the alternating-current/direct-current signal, and the unblocking signal in the active power control signal, and send a second active current reference signal to the active current control mode selection module;
the active current control mode selection module is used for receiving the first active current reference signal, the second active current reference signal, the active control mode selection signal and the fault characteristic signal, and sending the active current reference signal to the current amplitude limiting control module.
7. The flexible direct current transmission control protection real-time simulation device according to claim 5, wherein the reactive power control module comprises: the control system comprises a reactive power control module, a direct current voltage control module and a reactive current control mode selection module;
the reactive power control module is used for receiving a reactive power reference signal, the alternating current/direct current signal and the unblocking signal in the reactive power control signal and sending a first reactive current reference signal to the reactive current control mode selection module;
the direct-current voltage control module is configured to receive a direct-current voltage reference signal, the alternating-current/direct-current signal, and the unblocking signal in the reactive power control signal, and send a second reactive current reference signal to the reactive current control mode selection module;
the reactive current control mode selection module is used for receiving the first reactive current reference signal, the second reactive current reference signal, the reactive control mode selection signal and the fault characteristic signal and sending the reactive current reference signal to the current amplitude limiting control module.
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| CN112285459A (en) * | 2020-09-30 | 2021-01-29 | 清华大学 | Flexible direct current line traveling wave protection test method and computer readable storage medium |
| CN112285459B (en) * | 2020-09-30 | 2022-05-27 | 清华大学 | Flexible direct current line traveling wave protection test method and computer readable storage medium |
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