CN212622841U - Direct current control protection test system - Google Patents
Direct current control protection test system Download PDFInfo
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- CN212622841U CN212622841U CN202020436541.XU CN202020436541U CN212622841U CN 212622841 U CN212622841 U CN 212622841U CN 202020436541 U CN202020436541 U CN 202020436541U CN 212622841 U CN212622841 U CN 212622841U
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Abstract
The utility model discloses a direct current control protection test system, which comprises a real-time simulator, an LCC control protection device, an LCC pulse trigger device, a VSC control protection device, a VSC submodule trigger device and a workstation; the real-time simulator is respectively connected with a first input/output end of the LCC control protection device, a first input/output end of the VSC control protection device, a first input/output end of the LCC pulse trigger device and a first input/output end of the VSC sub-module trigger device; a second input/output end of the LCC control protection device is connected with a second input/output end of the LCC pulse trigger device; a second input/output end of the VSC control protection device is connected with a second input/output end of the VSC sub-module trigger device; the workstation is connected with LCC control protection device and VSC control protection device respectively through the switch. The system provided by the utility model both retrench, easily operate again, and with low costs, can also test and research the key characteristic of DC control protection device.
Description
Technical Field
The utility model relates to a power control protection test technical field especially relates to a direct current control protection test system.
Background
At present, the field of direct current transmission is mainly applied to two direct current transmission technologies, an LCC converter transmission technology, a VSC converter transmission technology and charging of a converter of a mixed type of LCC and VSC. LCC transmission is a semi-controlled device such as a thyristor, mainly carries out power transmission by controlling current on a direct current line, and needs larger direct current reactance on a direct current side. VSC transmission is a full-control device such as IGBT, the voltage of a direct current side is mainly controlled by controlling the on and off of direct current side sub-modules, and each sub-module needs to be configured with a large sub-module capacitor. The control protection system of each converter type is relatively complex, system control is carried out through a large number of control protection screen cabinets, the system is large, the occupied area is large, the cost is high, and time and labor are consumed when the system is subjected to performance test.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a direct current control protection test system, the system both retrencies, and easy operation again, and is with low costs, can not only realize with the same characteristic of on-the-spot actual control protection device, can also test and research direct current control protection device's key characteristic.
In order to achieve the above object, an embodiment of the present invention provides a dc control protection test system, which includes a real-time simulator, an LCC control protection device, an LCC pulse trigger device, a VSC control protection device, a VSC sub-module trigger device, and a workstation; wherein the content of the first and second substances,
a first input/output end of the real-time simulator is connected with a first input/output end of the LCC control protection device, a second input/output end of the real-time simulator is connected with a first input/output end of the VSC control protection device, an input end of the real-time simulator is connected with a first input/output end of the LCC pulse trigger device, and a third input/output end of the real-time simulator is connected with a first input/output end of the VSC sub-module trigger device;
a second input/output end of the LCC control protection device is connected with a second input/output end of the LCC pulse trigger device;
a second input/output end of the VSC control protection device is connected with a second input/output end of the VSC sub-module trigger device;
and the workstation is respectively connected with a third input/output end of the LCC control protection device and a third input/output end of the VSC control protection device through a switch.
Preferably, the workstation comprises a running workstation and a development workstation; the operation workstation is connected with a third input/output end of the LCC control protection device and a third input/output end of the VSC control protection device through the switch, and the development workstation is connected with the third input/output end of the LCC control protection device and the third input/output end of the VSC control protection device through the switch.
Preferably, the input end of the real-time simulator is connected with the first input/output end of the LCC pulse triggering device through a cable and an interface board card.
Preferably, the third input/output end of the real-time simulator is connected with the first input/output end of the VSC sub-module trigger device through an optical fiber.
Preferably, the second input/output end of the LCC control protection device is connected with the second input/output end of the LCC pulse triggering device through an optical fiber.
Preferably, a second input/output end of the VSC control protection device is connected with a second input/output end of the VSC sub-module trigger device through an optical fiber.
Compared with the prior art, the embodiment of the utility model provides a direct current control protection test system retrenches through the experimental screen cabinet of transverter complicated with actual scene, remains core and key part such as LCC control protection device and VSC control protection device, and real-time emulation ware and workstation of arranging again reach and can realize and the same characteristic of on-the-spot actual control protection device, can also test and research direct current control protection device's key characteristic.
Drawings
Fig. 1 is a schematic structural diagram of a dc control protection testing system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a testing method of a dc control protection testing system according to an 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 efforts belong to the protection scope of the present invention.
Referring to fig. 1, which is a schematic structural diagram of a dc control protection testing system provided in an embodiment of the present invention, the system includes a real-time simulator, an LCC control protection device, an LCC pulse trigger device, a VSC control protection device, a VSC sub-module trigger device, and a workstation; wherein the content of the first and second substances,
a first input/output end of the real-time simulator is connected with a first input/output end of the LCC control protection device, a second input/output end of the real-time simulator is connected with a first input/output end of the VSC control protection device, a third input/output end of the real-time simulator is connected with a first input/output end of the LCC pulse trigger device, and a fourth input/output end of the real-time simulator is connected with a first input/output end of the VSC sub-module trigger device;
a second input/output end of the LCC control protection device is connected with a second input/output end of the LCC pulse trigger device;
a second input/output end of the VSC control protection device is connected with a second input/output end of the VSC sub-module trigger device;
and the workstation is respectively connected with a third input/output end of the LCC control protection device and a third input/output end of the VSC control protection device through a switch.
It should be noted that, at present, the field of dc power transmission is mainly applied to two dc power transmission technologies, an LCC converter power transmission technology and a VSC converter power transmission technology, and charging of an LCC and VSC hybrid converter. The LCC is called a Line Commutated Converter, also called a phase control Converter, and the VSC is called a Voltage Source Converter, also called a Voltage Source Converter. The control protection system of each converter type is relatively complex, and the cost is high because the system control is carried out through a large number of control protection screen cabinets. Taking the yunnan asynchronous networking project as an example, the project relates to 2 conventional direct current transmission units and 1 flexible direct current transmission unit, a screen cabinet has 200 surfaces, and the system is extremely large and complex.
To the test screen cabinet in current scene complicacy, the utility model discloses simplify this system. Specifically, the direct-current control protection test system comprises a real-time simulator, an LCC control protection device, an LCC pulse trigger device, a VSC control protection device, a VSC submodule trigger device and a workstation. The real-time simulator is used for simulating primary equipment in an actual power grid, such as a converter valve, a transformer, a direct current line and the like. The LCC control protection device, the LCC pulse trigger device, the VSC control protection device and the VSC sub-module trigger device jointly form a control protection device for simulating a control protection system in an actual power grid. And the workstation is used for developing the control protection system program and operating the control protection system program. Wherein the content of the first and second substances,
a first input/output end of the real-time simulator is connected with a first input/output end of the LCC control protection device, a second input/output end of the real-time simulator is connected with a first input/output end of the VSC control protection device, a third input/output end of the real-time simulator is connected with a first input/output end of the LCC pulse trigger device, and a fourth input/output end of the real-time simulator is connected with a first input/output end of the VSC sub-module trigger device;
a second input/output end of the LCC control protection device is connected with a second input/output end of the LCC pulse trigger device; and a second input/output end of the VSC control protection device is connected with a second input/output end of the VSC sub-module trigger device.
And the workstation is respectively connected with a third input/output end of the LCC control protection device and a third input/output end of the VSC control protection device through the switch. The workstation accesses the network of the system through the switch, and besides the switch, the workstation can also access the network of the system through other communication modes.
The utility model discloses a direct current control protection test system that this embodiment provided, through utilizing the simulator, LCC control protection device, LCC pulse trigger device, VSC control protection device, VSC submodule trigger device and workstation, replace the complicated control protection screen cabinet of LCC transverter and VSC transverter in the actual electric wire netting engineering, the simulation system structure that makes has both retrencied, core and key part have been kept, can realize again with the same characteristic of on-the-spot actual control protection device, thereby test and research direct current control protection device's key characteristic.
As an improvement of the above scheme, the workstation comprises an operation workstation and a development workstation; the operation workstation is connected with a third input/output end of the LCC control protection device and a third input/output end of the VSC control protection device through the switch, and the development workstation is connected with the third input/output end of the LCC control protection device and the third input/output end of the VSC control protection device through the switch.
Specifically, the workstation includes an operation workstation and a development workstation; the operation workstation is connected with a third input/output end of the LCC control protection device and a third input/output end of the VSC control protection device through the switch respectively, and the development workstation is connected with the third input/output end of the LCC control protection device and the third input/output end of the VSC control protection device through the switch respectively. The operation workstation is used for operating the control protection system program; and the development workstation is used for developing a control protection system program, and the development workstation and the control protection system program are both unavailable. In addition, the connection between the workstation and the switch, and the connection between the switch and the LCC control protection device and the VSC control protection device may also use network cables.
As an improvement of the above scheme, an input end of the real-time simulator is connected with a first input/output end of the LCC pulse triggering device through a cable and an interface board card.
Specifically, an input end of the real-time simulator is connected with a first input/output end of the LCC pulse trigger device through a cable and an interface board card, and is used for receiving a pulse signal sent by the LCC pulse trigger device so as to control a simulation model of the real-time simulator.
As an improvement of the scheme, the third input/output end of the real-time simulator is connected with the first input/output end of the VSC sub-module trigger device through an optical fiber.
Specifically, a third input/output end of the real-time simulator is connected with a first input/output end of the VSC sub-module trigger device through an optical fiber, and is used for receiving a pulse signal sent by the VSC sub-module trigger device and sending each sub-module voltage to the VSC sub-module trigger device.
As an improvement of the above scheme, the second input/output end of the LCC control protection device is connected with the second input/output end of the LCC pulse trigger device through an optical fiber.
Specifically, a second input/output end of the LCC control protection device is connected with a second input/output end of the LCC pulse trigger device through an optical fiber, so that the LCC pulse trigger device can send a simulated thyristor conducting state signal to the LCC control protection device, and the thyristor conducting state signal is used for indicating that the thyristor has been reliably triggered; the LCC pulse trigger device can also receive a trigger angle sent by the LCC control protection device and convert the trigger angle into a trigger pulse signal to be issued.
As an improvement of the scheme, the second input/output end of the VSC control protection device is connected with the second input/output end of the VSC sub-module trigger device through an optical fiber.
Specifically, the second input/output end of the VSC control protection device is connected with the second input/output end of the VSC sub-module trigger device through optical fibers, so that the VSC sub-module trigger device can send the running state and the sub-module voltage of the VSC control protection device, and meanwhile, the VSC sub-module trigger device can also receive the modulation wave and the unblocking signal of the VSC control protection device.
Referring to fig. 2, which is a schematic flow chart of a testing method of a dc control protection testing system according to another embodiment of the present invention, it can be seen from fig. 2 that the testing method of a dc control protection testing system includes the following specific steps:
building and operating a primary model of direct current transmission operation in a real-time simulator;
a main control station is arranged in a control protection system, namely, the main control station is arranged in an LCC control protection device and a VSC control protection device, and the control mode of each direct current station is set to be a sequential control automatic mode or a sequential control manual mode;
the dc field ground mode is adjusted to a predetermined operating mode, such as a bipolar earth return mode.
And adjusting the model into a bipolar unlocking operation mode, wherein the operation state of the operation valve group is substantially adjusted into the bipolar unlocking operation mode so as to carry out rated power operation. In addition, the direct current filter is adjusted to be in a connection state, direct current voltage and current are set, full voltage of the pole 1 and the pole 2 is achieved, normal communication between stations is guaranteed, a power transmission mode and a set value are set, and the power transmission mode can be set to be a bipolar power control mode; setting tap control mode: automatic, angle control; setting a reactive power control mode of each direct current station: both stations 1 and 2 are in Q mode; and setting a real-time simulator, namely RTDS (real time digital system) as a mode of an equivalent power supply.
And changing the operation condition of the primary model in the real-time simulator to perform fault simulation. For example, a single-phase metal ground fault occurs in an alternating current system of a simulation station 1 in a real-time simulator, the voltage drops to 0%, the fault duration is 700ms, and the real-time simulator is matched with wave recording for 10 s.
And obtaining the response of the LCC control protection device and the VSC control protection device, observing and recording the response condition, and finishing the test.
To sum up, the embodiment of the utility model provides a direct current control protection test system retrenches through the experimental screen cabinet of transverter complicated with actual scene, remains core and key part such as LCC control protection device and VSC control protection device, and real-time emulation ware and workstation of arranging again reach and can realize and the same characteristic of on-the-spot actual control protection device, can also test and study direct current control protection device's key characteristic.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (6)
1. A direct current control protection test system is characterized by comprising a real-time simulator, an LCC control protection device, an LCC pulse trigger device, a VSC control protection device, a VSC submodule trigger device and a workstation; wherein the content of the first and second substances,
a first input/output end of the real-time simulator is connected with a first input/output end of the LCC control protection device, a second input/output end of the real-time simulator is connected with a first input/output end of the VSC control protection device, an input end of the real-time simulator is connected with a first input/output end of the LCC pulse trigger device, and a third input/output end of the real-time simulator is connected with a first input/output end of the VSC sub-module trigger device;
a second input/output end of the LCC control protection device is connected with a second input/output end of the LCC pulse trigger device;
a second input/output end of the VSC control protection device is connected with a second input/output end of the VSC sub-module trigger device;
and the workstation is respectively connected with a third input/output end of the LCC control protection device and a third input/output end of the VSC control protection device through a switch.
2. The dc control protection test system of claim 1, wherein the workstation comprises a run workstation and a development workstation; the operation workstation is connected with a third input/output end of the LCC control protection device and a third input/output end of the VSC control protection device through the switch, and the development workstation is connected with the third input/output end of the LCC control protection device and the third input/output end of the VSC control protection device through the switch.
3. The dc control protection test system of claim 1, wherein an input terminal of the real-time simulator is connected to the first input/output terminal of the LCC pulse triggering device through a cable and an interface board.
4. The direct current control protection test system of claim 1, wherein a third input/output end of the real-time simulator is connected with a first input/output end of the VSC sub-module triggering device through an optical fiber.
5. The dc controlled protection test system of claim 1, wherein the second input/output terminal of the LCC controlled protection device is connected to the second input/output terminal of the LCC pulse trigger device by an optical fiber.
6. The DC control protection test system of claim 1, wherein the second input/output of the VSC control protection device is connected to the second input/output of the VSC sub-module trigger device by an optical fiber.
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| CN111458580A (en) * | 2020-03-30 | 2020-07-28 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Direct-current control protection test system and test method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111458580A (en) * | 2020-03-30 | 2020-07-28 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Direct-current control protection test system and test method thereof |
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