CN111025059A - Transient electromagnetic pulse injection test system and method for high-voltage port of converter valve sub-module - Google Patents
Transient electromagnetic pulse injection test system and method for high-voltage port of converter valve sub-module Download PDFInfo
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- CN111025059A CN111025059A CN201911266213.8A CN201911266213A CN111025059A CN 111025059 A CN111025059 A CN 111025059A CN 201911266213 A CN201911266213 A CN 201911266213A CN 111025059 A CN111025059 A CN 111025059A
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Abstract
The invention discloses a transient electromagnetic pulse injection test system and method for a high-voltage port of a converter valve submodule. The method comprises the following steps: grounding the tested converter valve sub-module; connecting a high-voltage direct-current power supply with a high-voltage coupling decoupling network; connecting an electromagnetic pulse generator with a high-voltage coupling and decoupling network; connecting a high-voltage coupling and decoupling network with the high-voltage port of the sub-module; connecting electromagnetic interference test equipment with the sub-module monitoring circuit board; starting a high-voltage direct-current power supply and a high-voltage coupling decoupling network; starting the electromagnetic interference test equipment; starting an electromagnetic pulse generator, and injecting transient electromagnetic pulses into the high-voltage port of the sub-module through the high-voltage coupling decoupling network; and the electromagnetic interference test equipment determines the influence degree of the tested converter valve submodule by the transient electromagnetic pulse according to the monitoring data obtained from the submodule monitoring circuit board and according to a preset judgment rule. The method has the advantages of rapid adjustment of test parameters and high test accuracy.
Description
Technical Field
The invention belongs to the technical field of electronic detection of power systems, and particularly relates to a transient electromagnetic pulse injection test system and method for a high-voltage port of a converter valve submodule.
Background
The flexible direct-current power grid test demonstration project of Zhang Bei renewable energy resources, which is being built in China, is the first four-terminal +/-500 kV flexible direct-current power grid project in the world. The Zhang Bei flexible direct current power grid can meet the delivery requirement of renewable energy sources in Zhang Jiakou areas for medium and long periods and the load requirement in Jingjin Ji areas, and meanwhile, the project can directly serve the Beijing-Zhang Jiakou winter Olympic Games in 2022 years.
In the flexible direct current converter valve used in the four-terminal +/-500 kV flexible direct current power grid, each bridge arm is formed by connecting 264 submodules in series. The flexible direct current converter valve submodule comprises a high-voltage port, a submodule monitoring circuit board, a submodule copper bar, an Insulated Gate Bipolar Transistor (IGBT) module which is quickly switched on and off and the like. Because the position distance of this submodule piece control circuit board is less than 0.3m apart from the submodule piece copper bar that flows through high voltage heavy current and the IGBT of switching on and shutting down fast, the electromagnetic environment that gentle straight converter valve submodule piece was whole to be located is very abominable, carries out the immunity test to this gentle straight converter valve submodule piece and has important meaning.
And in the existing GB 17626 series electromagnetic compatibility standard, a test method for injecting electromagnetic pulses into a high-voltage port is not available, so that the anti-interference capability of the sub-module on the transient electromagnetic pulses cannot be effectively tested.
Disclosure of Invention
The invention provides a transient electromagnetic pulse injection test system and method for a high-voltage port of a converter valve submodule, and aims to solve the problem that a pulse waveform anti-electromagnetic interference capability test cannot be carried out on the converter valve submodule in the prior art.
In a first aspect, the invention provides a transient electromagnetic pulse injection test method for a high-voltage port of a converter valve submodule, which comprises the following steps:
1) building a test environment:
grounding a tested converter valve sub-module, wherein the converter valve sub-module comprises a sub-module monitoring circuit board and a sub-module high-voltage port which are connected;
connecting a high-voltage direct-current power supply with a high-voltage coupling decoupling network;
connecting an electromagnetic pulse generator with a high-voltage coupling and decoupling network;
connecting a high-voltage coupling and decoupling network with the high-voltage port of the sub-module;
connecting electromagnetic interference test equipment with the sub-module monitoring circuit board;
2) starting each device to make the submodule monitoring circuit board work normally:
starting a high-voltage direct-current power supply and a high-voltage coupling decoupling network, and providing high-voltage direct-current voltage for the submodule monitoring circuit board through the submodule high-voltage port;
starting the electromagnetic interference test equipment to enable the sub-module monitoring circuit board to execute the working waveform received from the electromagnetic interference test equipment so as to normally work;
3) injecting transient electromagnetic pulses into the high-voltage port of the sub-module:
starting an electromagnetic pulse generator, and injecting transient electromagnetic pulses into the high-voltage port of the sub-module through the high-voltage coupling decoupling network;
4) determining the immunity of the submodule monitoring circuit board to the transient electromagnetic pulse:
and the electromagnetic interference test equipment determines the influence degree of the tested converter valve submodule by the transient electromagnetic pulse according to the monitoring data obtained from the submodule monitoring circuit board and according to a preset judgment rule.
Specifically, 1) set up the test environment, still include:
connecting an oscilloscope with the high-voltage port of the sub-module; accordingly, the number of the first and second electrodes,
and 3) injecting transient electromagnetic pulses into the high-voltage port of the sub-module, further comprising:
and starting the oscilloscope, and adjusting the electromagnetic pulse generator according to the monitored waveform of the oscilloscope, so that the electromagnetic pulse generator generates transient electromagnetic pulses of the voltage grade specified in the pre-established test plan.
Specifically, 3) injecting transient electromagnetic pulse into the high-voltage port of the sub-module,
the method for injecting the high-voltage transient electromagnetic pulse into the high-voltage port of the sub-module comprises a common mode injection mode and a differential mode injection mode;
when the electromagnetic interference mode to be simulated in the pre-made test plan is common-mode electromagnetic interference, adopting a common-mode injection mode;
and when the electromagnetic interference mode to be simulated in the pre-established test plan is differential mode electromagnetic interference, adopting a differential mode injection mode.
Specifically, the high voltage coupling and decoupling network comprises a ground terminal, a high voltage terminal and a neutral line terminal;
the common mode injection mode comprises the following steps:
connecting the ground terminal and the high-voltage terminal with the high-voltage port of the sub-module respectively;
the differential mode injection mode comprises the following steps:
and respectively connecting the high-voltage terminal and the neutral terminal with a sub-module high-voltage port.
Specifically, the electromagnetic interference test equipment comprises an industrial control computer provided with an acquisition board card and a drive board card;
and 4) determining the immunity of the submodule monitoring circuit board to the transient electromagnetic pulse, wherein the immunity comprises the following steps:
judging whether the monitoring data is within a preset threshold range;
if the current is within the threshold range, the submodule monitoring circuit board can still normally work after being subjected to electromagnetic interference;
if the current is not within the threshold range, the submodule is judged to monitor that the circuit board cannot work normally after being subjected to electromagnetic interference.
Specifically, the high-voltage coupling and decoupling network comprises a pulse input port connected with the electromagnetic pulse generator;
the high voltage coupling and decoupling network includes a dc input port that is subject to a dc input voltage of 2.2 kV.
Specifically, the oscilloscope is powered by a battery or an isolation transformer.
Specifically, the electromagnetic pulse generator is powered by alternating current 220V;
when the output of the high-voltage direct-current power supply is 2.2kV direct-current voltage, the transient electromagnetic pulse output by the electromagnetic pulse generator comprises:
a surge signal having a voltage of 2kV, 3kV or 4 kV;
an electrical fast transient pulse burst at a voltage of 2kV, 3kV, or 4 kV;
the damped oscillation wave has a voltage of 2kV, 3kV, or 4 kV.
In a second aspect, the present invention provides a transient electromagnetic pulse injection testing system for a high-voltage port of a sub-module of a converter valve, including:
the tested flexible straight converter valve sub-module;
a high voltage direct current power supply;
an electromagnetic pulse generator;
a high voltage coupling decoupling network;
an electromagnetic interference test device;
the tested soft direct converter valve sub-module, the high voltage direct current power supply, the electromagnetic pulse generator, the high voltage coupling and decoupling network, and the electromagnetic interference test equipment perform the transient electromagnetic pulse injection test explained in the first aspect.
Specifically, the high-voltage coupling and decoupling network comprises a pulse input port connected with the electromagnetic pulse generator;
the high voltage coupling and decoupling network includes a dc input port that is subject to a dc input voltage of 2.2 kV.
The transient electromagnetic pulse injection test system and method for the high-voltage port of the converter valve submodule provided by the invention are used for the flexible-direct converter valve of the converter station, the submodule is tested in a laboratory to monitor the anti-electromagnetic interference capability of a circuit board on the transient electromagnetic pulse waveform, the test parameters are quickly adjusted, the test accuracy is high, and the test result of the electromagnetic interference is favorable for ensuring the safe and stable operation of the converter valve of the flexible-direct converter station.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
fig. 1 is a schematic flow chart of a soft-straight converter valve sub-module high-voltage port electromagnetic pulse injection method according to an embodiment of the present invention;
fig. 2 is a schematic composition diagram of a high-voltage port electromagnetic pulse injection system of a submodule of a flexible-straight converter valve according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a compliant converter valve sub-module according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a high voltage coupling and decoupling network according to an embodiment of the present invention; wherein the content of the first and second substances,
1. an upper computer; 2. a flexible straight converter valve submodule; 3. an oscilloscope; 4. a high voltage coupling decoupling network; 5. an electromagnetic pulse generator; 6. a high voltage direct current power supply; 7. a ground reference plane; 8. an insulating support; 9. the submodule monitors the circuit board; 10. a sub-module high-voltage port.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
It should be understood that the sub-module herein monitors the circuit board, including the circuit substrate and the monitoring circuit disposed thereon.
As shown in fig. 1, the transient electromagnetic pulse injection test method for the high-voltage port of the converter valve sub-module according to the embodiment of the invention includes:
step S00: building a test environment:
grounding a tested converter valve sub-module, wherein the converter valve sub-module comprises a sub-module monitoring circuit board and a sub-module high-voltage port which are connected;
connecting a high-voltage direct-current power supply with a high-voltage coupling decoupling network;
connecting an electromagnetic pulse generator with a high-voltage coupling and decoupling network;
connecting a high-voltage coupling and decoupling network with the high-voltage port of the sub-module;
connecting electromagnetic interference test equipment with the sub-module monitoring circuit board;
step S200: starting each device to make the submodule monitoring circuit board work normally:
starting a high-voltage direct-current power supply and a high-voltage coupling decoupling network, and providing high-voltage direct-current voltage for the submodule monitoring circuit board through the submodule high-voltage port;
starting the electromagnetic interference test equipment to enable the sub-module monitoring circuit board to execute the working waveform received from the electromagnetic interference test equipment so as to normally work;
step S300: injecting transient electromagnetic pulses into the high-voltage port of the sub-module:
starting an electromagnetic pulse generator, and injecting transient electromagnetic pulses into the high-voltage port of the sub-module through the high-voltage coupling decoupling network;
step S400: determining the immunity of the submodule monitoring circuit board to the transient electromagnetic pulse:
and the electromagnetic interference test equipment determines the influence degree of the tested converter valve submodule by the transient electromagnetic pulse according to the monitoring data obtained from the submodule monitoring circuit board and according to a preset judgment rule.
Specifically, 1) set up the test environment, still include:
connecting an oscilloscope with the high-voltage port of the sub-module; accordingly, the number of the first and second electrodes,
and 3) injecting transient electromagnetic pulses into the high-voltage port of the sub-module, further comprising:
and starting the oscilloscope, and adjusting the electromagnetic pulse generator according to the monitored waveform of the oscilloscope, so that the electromagnetic pulse generator generates transient electromagnetic pulses of the voltage grade specified in the pre-established test plan.
Specifically, 3) injecting transient electromagnetic pulse into the high-voltage port of the sub-module,
the method for injecting the high-voltage transient electromagnetic pulse into the high-voltage port of the sub-module comprises a common mode injection mode and a differential mode injection mode;
when the electromagnetic interference mode to be simulated in the pre-made test plan is common-mode electromagnetic interference, adopting a common-mode injection mode;
and when the electromagnetic interference mode to be simulated in the pre-established test plan is differential mode electromagnetic interference, adopting a differential mode injection mode.
Specifically, the high voltage coupling and decoupling network comprises a ground terminal, a high voltage terminal and a neutral line terminal;
the common mode injection mode comprises the following steps:
connecting the ground terminal and the high-voltage terminal with the high-voltage port of the sub-module respectively;
the differential mode injection mode comprises the following steps:
and respectively connecting the high-voltage terminal and the neutral terminal with a sub-module high-voltage port.
Specifically, the electromagnetic interference test equipment comprises an industrial control computer provided with an acquisition board card and a drive board card;
and 4) determining the immunity of the submodule monitoring circuit board to the transient electromagnetic pulse, wherein the immunity comprises the following steps:
judging whether the monitoring data is within a preset threshold range;
if the current is within the threshold range, the submodule monitoring circuit board can still normally work after being subjected to electromagnetic interference;
if the current is not within the threshold range, the submodule is judged to monitor that the circuit board cannot work normally after being subjected to electromagnetic interference.
Specifically, the high-voltage coupling and decoupling network comprises a pulse input port connected with the electromagnetic pulse generator;
the high voltage coupling and decoupling network includes a dc input port that is subject to a dc input voltage of 2.2 kV.
Specifically, the oscilloscope is powered by a battery or an isolation transformer.
Specifically, the electromagnetic pulse generator is powered by alternating current 220V;
when the output of the high-voltage direct-current power supply is 2.2kV direct-current voltage, the transient electromagnetic pulse output by the electromagnetic pulse generator comprises:
a surge signal having a voltage of 2kV, 3kV or 4 kV;
an electrical fast transient pulse burst at a voltage of 2kV, 3kV, or 4 kV;
the damped oscillation wave has a voltage of 2kV, 3kV, or 4 kV.
As shown in fig. 2, the transient electromagnetic pulse injection testing system for the high-voltage port of the sub-module of the converter valve according to the embodiment of the invention includes:
the tested flexible straight converter valve sub-module 2;
a high voltage direct current power supply 6;
an electromagnetic pulse generator 5;
a high voltage coupling and decoupling network 4;
an electromagnetic interference test device;
the tested flexible direct current converter valve submodule, the high-voltage direct current power supply, the electromagnetic pulse generator, the high-voltage coupling and decoupling network and the electromagnetic interference testing equipment execute the transient electromagnetic pulse injection test.
Specifically, the high-voltage coupling and decoupling network 4 comprises a pulse input port connected with the electromagnetic pulse generator 5;
the high voltage coupling and decoupling network 4 comprises a dc input port which is subjected to a dc input voltage of 2.2 kV.
The transient electromagnetic pulse injection test system and method for the high-voltage port of the converter valve submodule in the embodiment of the invention are used for the flexible-direct converter valve of the converter station, the submodule is tested in a laboratory to monitor the anti-electromagnetic interference capability of a circuit board on the transient electromagnetic pulse waveform, the test parameters are adjusted quickly, the test accuracy is high, and the test result of the electromagnetic interference is favorable for ensuring the safe and stable operation of the converter valve of the flexible-direct converter station.
It should be understood that in the converter valve submodule, the submodule high-voltage port is connected with the submodule monitoring circuit board through a lead. The high voltage port includes a voltage terminal of 2.2kV voltage class and a ground terminal.
During actual work, the converter valve submodule supplies high-voltage direct-current electric energy to the high-voltage port through the copper bar, supplies power to the submodule monitoring circuit board through the high-voltage port, and controls the IGBT switch operation through the submodule monitoring circuit board according to the working waveform. At this time, the source of electromagnetic interference caused to the sub-module monitoring circuit board is the copper bar passing through large voltage and large current and the IGBT which is frequently switched on and off.
Therefore, in the immunity test carried out by the invention, no voltage or current passes through the copper bar; the IGBT is not disconnected any more, thereby stripping the copper bar and the IGBT from the sub-module and independently inspecting the immunity of the sub-module monitoring circuit board to transient electromagnetic pulse.
Specifically, a high-voltage direct-current power supply is used for supplying power to the sub-module monitoring circuit board, and transient electromagnetic pulses output by the electromagnetic pulse generator are injected into the high-voltage port to simulate electromagnetic interference caused by a copper bar flowing large voltage and large current and an IGBT which is frequently switched on and switched off to the sub-module monitoring circuit board during normal work.
Specifically, the working waveform is generated by the electromagnetic interference test equipment, so that the sub-module monitoring circuit board generates an instruction signal for switching on and off the IGBT according to the working waveform, and determines the immunity of the sub-module monitoring circuit board to the transient electromagnetic pulse by detecting whether the instruction signal is correct or not to judge the electromagnetic interference of the transient electromagnetic pulse injected through the high-voltage port on the sub-module monitoring circuit board.
Specifically, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the transient electromagnetic pulse injection testing method for the high-voltage port of the converter valve sub-module includes:
step 1): the converter valve submodule 2 is placed on an insulating support 8, and a high-voltage direct-current power supply 6 supplies power to a submodule monitoring circuit board 9 through a high-voltage coupling and decoupling network 4 and a submodule high-voltage port 10; meanwhile, the electromagnetic pulse generator 5 is connected with the high-voltage port 10 of the sub-module through the high-voltage coupling and decoupling network 4; connecting an oscilloscope 3 with a sub-module high-voltage port 10; and connecting the upper computer 1 with the submodule monitoring circuit board 9 to judge whether the monitoring circuit board 9 sends out an instruction signal for enabling the IGBT to work correctly.
Step 2): a high-voltage direct-current power supply 6 (used for providing 2.2KV direct current) is used for providing high-voltage direct-current electric energy to a high-voltage port of the converter valve submodule 2 through a high-voltage coupling and decoupling network 4, so that the submodule monitoring circuit board 9 can normally work according to the electric energy obtained from the high-voltage port and the working waveform obtained from the upper computer 1, and an instruction signal for enabling the IGBT to correctly work is output;
specifically, the high-voltage dc power supply 6 (for providing 2.2KV dc) is connected to the sub-module monitoring circuit board 9 sequentially through the high-voltage coupling and decoupling network 4 and the sub-module high-voltage port 10, and supplies power to the sub-module monitoring circuit board 9.
Step 3): injecting high-voltage transient electromagnetic pulse into a high-voltage port 10 of the sub-module by using an electromagnetic pulse generator 5 through a high-voltage coupling decoupling network 4 so as to generate electromagnetic interference on a monitoring circuit board 9 of the sub-module;
step 4): monitoring the waveform of the oscilloscope 3, and adjusting the electromagnetic pulse generator 5 according to the monitored waveform of the oscilloscope, so that the electromagnetic pulse generator 5 sequentially outputs high-voltage transient electromagnetic pulses with different grades and waveforms according to a pre-made test plan;
step 5): and starting the upper computer 1, and judging whether the monitored sub-module monitoring circuit board 9 is subjected to electromagnetic interference of the high-voltage transient electromagnetic pulse or whether the monitored sub-module monitoring circuit board 9 fails (i.e. loses working capability) due to the high-voltage transient electromagnetic pulse according to monitoring data acquired by the upper computer 1 from the sub-module monitoring circuit board.
In specific implementation, the electromagnetic interference test equipment comprises an industrial control computer, namely an upper computer 1, which is provided with a collection board card and a drive board card. The converter valve sub-modules need to be independently grounded when carrying out the immunity test. During specific implementation, a grounding metal plate is placed on the ground to serve as a grounding reference plane 7, and an insulating support 8 is arranged between one side, facing the grounding metal plate, of the converter valve sub-module and the grounding metal plate, so that the converter valve sub-module is insulated from the ground.
It should be understood that here the grounded metal plate is used to provide a ground reference plane for the converter valve sub-module. Other devices, such as high voltage coupling and decoupling networks, high voltage dc power supplies, electromagnetic pulse generators, oscilloscopes, upper computers are also provided with reliable grounding measures as disclosed in the prior art.
Specifically, the sub-module monitoring circuit board 9 includes: the high-voltage energy-taking power supply comprises a high-voltage energy-taking power supply, a main control board and a drive board, wherein the high-voltage energy-taking power supply obtains 2.2kV direct current from a high-voltage direct current capacitor connected with an external high-voltage direct current power supply (such as a high-voltage direct current power supply 6 accessed through a high-voltage coupling and decoupling network 4 and a submodule high-voltage port 10), and converts the direct current into 16V direct current to respectively supply power to the drive board and the main.
The driving board and the main control board control and drive the IGBT of the converter valve sub-module to work according to the received instruction waveform from the upper computer. Specifically, the main control board is connected with the main control room and used for controlling the driving board; the driving plate is used for controlling the IGBT to be switched on and off. The upper computer is used for monitoring whether the driving board and the main control board send out command signals for enabling the IGBT to work correctly in the immunity test.
The signal obtained by the probe of the oscilloscope 3 from the high-voltage port 10 of the submodule is a superimposed signal of 2.2kV direct current and kV level pulse signals, and the waveform of the superimposed signal is displayed in the display screen of the oscilloscope 3.
Wherein, the electromagnetic pulse generator 5 is powered by 220V alternating current; when the output of the high-voltage direct-current power supply is a direct-current voltage of 2.2kV, the high-voltage transient electromagnetic pulse output by the electromagnetic pulse generator 5 comprises:
a surge signal having a voltage of 2kV, 3kV, or 4 kV;
an electrical fast transient pulse burst at a voltage of 2kV, 3kV, or 4 kV;
the damped oscillation wave has a voltage of 2kV, 3kV, or 4 kV.
High-voltage transient electromagnetic pulses output by the electromagnetic pulse generator 5 are injected into the high-voltage port 10 of the sub-module after being capacitively coupled by the high-voltage coupling and decoupling network 4;
the high-voltage coupling and decoupling network 4 receives high-voltage direct current electric energy provided by the high-voltage direct current power supply 6 and supplies power to the submodule monitoring circuit board 9 through the submodule high-voltage port 10; the high-voltage coupling and decoupling network 4 also adopts a decoupling inductor to reversely isolate the high-voltage transient pulse signal from the high-voltage direct-current power supply 6.
The high voltage coupling and decoupling network 4 can withstand an input voltage of 2.2 kV. Different from the common coupling and decoupling network which can only bear the direct current input voltage not exceeding 500V, the coupling and decoupling network adopted in the test device can bear the high voltage of 2.2kV required by the test.
As shown in fig. 3, in the immunity test state, the high voltage dc power supply 6 supplies power to the submodule monitoring circuit board 9 through the submodule high voltage port 10. In fig. 3, the two leftmost terminals are or are used for connecting copper bars for flowing high voltage and large current, and the two terminals are not electrically connected in the noise immunity test state.
Specifically, the modes of injecting the high-voltage transient electromagnetic pulse from the electromagnetic pulse generator 5 to the high-voltage port 10 of the sub-module in step 3) include a common mode injection mode and a differential mode injection mode: when the electromagnetic interference mode to be simulated is common-mode electromagnetic interference, a common-mode injection mode is adopted; and when the electromagnetic interference mode to be simulated is differential mode electromagnetic interference, adopting a differential mode injection mode.
As shown in the high-voltage coupling and decoupling network 4 in fig. 4, the common mode injection manner specifically includes: transient electromagnetic pulses are injected into the submodule monitoring circuit board 9 through the grounding terminal PE and the high-voltage terminal L1 through the submodule high-voltage port 10; the differential mode injection mode specifically comprises the following steps: transient electromagnetic pulses are injected into the submodule monitoring circuit board 9 through the neutral line N and the high voltage terminal L1 through the submodule high voltage port 10.
In fig. 4, 3 capacitors C (coupling capacitors) at the upper right side of the high-voltage coupling and decoupling network 4 are respectively connected with the high-voltage direct-current power supply 6; the rightmost terminals connected to the three inductors L (decoupling inductors) are connected to the pulse signal generator 5.
Specifically, the oscilloscope 3 is powered by a battery or an isolation transformer.
The method for judging whether the flexible-straight converter valve submodule 2 is subjected to electromagnetic interference in the step 5) comprises the following steps:
judging whether the monitoring data of the upper computer is within a preset normal threshold range; if the monitoring data of the upper computer is within the normal threshold range, judging that the converter valve sub-module 2 is not subjected to electromagnetic interference; otherwise, the converter valve submodule 2 is judged to be subjected to electromagnetic interference.
Specifically, the upper computer monitors signals output from the optical fiber interface between the drive board of the sub-module monitoring circuit board 9 and the main control board, and determines whether the drive board of the sub-module monitoring circuit board 9 and the main control board are working normally according to the error rate. Preferably, it is also possible to monitor whether the bypass switch of the submodule is malfunctioning.
According to the flexible direct converter valve submodule high-voltage port electromagnetic pulse injection test method, an electromagnetic interference test is directly carried out in a laboratory, and the implementation is convenient; compared with the existing laboratory standard electromagnetic compatibility test, the method can more truly investigate the anti-interference capability of the flexible-straight converter valve submodule, can effectively test the tolerance degree of the flexible-straight converter valve submodule to transient electromagnetic interference under the actual working condition of the converter station, and is favorable for deeply researching the electromagnetic interference problem of the flexible-straight converter station on the converter valve submodule under the complex electromagnetic environment.
According to the soft direct converter valve submodule high-voltage port electromagnetic pulse injection test method, high-voltage transient electromagnetic interference of different levels can be effectively injected into the submodule high-voltage port, the submodule can be favorably tested for the anti-electromagnetic interference capability of transient electromagnetic pulse, and therefore safe and stable operation of the soft direct converter station is guaranteed better.
The invention has been described above by reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a// the [ device, component, etc ]" are to be interpreted openly as at least one instance of a device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
Claims (10)
1. A transient electromagnetic pulse injection test method for a high-voltage port of a converter valve sub-module is characterized by comprising the following steps:
1) building a test environment:
grounding a tested converter valve sub-module, wherein the converter valve sub-module comprises a sub-module monitoring circuit board and a sub-module high-voltage port which are connected;
connecting a high-voltage direct-current power supply with a high-voltage coupling decoupling network;
connecting an electromagnetic pulse generator with a high-voltage coupling and decoupling network;
connecting a high-voltage coupling and decoupling network with the high-voltage port of the sub-module;
connecting electromagnetic interference test equipment with the sub-module monitoring circuit board;
2) starting each device to make the submodule monitoring circuit board work normally:
starting a high-voltage direct-current power supply and a high-voltage coupling decoupling network, and providing high-voltage direct-current voltage for the submodule monitoring circuit board through the submodule high-voltage port;
starting the electromagnetic interference test equipment to enable the sub-module monitoring circuit board to execute the working waveform received from the electromagnetic interference test equipment so as to normally work;
3) injecting transient electromagnetic pulses into the high-voltage port of the sub-module:
starting an electromagnetic pulse generator, and injecting transient electromagnetic pulses into the high-voltage port of the sub-module through the high-voltage coupling decoupling network;
4) determining the immunity of the submodule monitoring circuit board to the transient electromagnetic pulse:
and the electromagnetic interference test equipment determines the influence degree of the tested converter valve submodule by the transient electromagnetic pulse according to the monitoring data obtained from the submodule monitoring circuit board and according to a preset judgment rule.
2. The converter valve sub-module high-voltage port transient electromagnetic pulse injection testing method of claim 1,
the 1) test environment is built, and the method further comprises the following steps:
connecting an oscilloscope with the high-voltage port of the sub-module; accordingly, the number of the first and second electrodes,
and 3) injecting transient electromagnetic pulses into the high-voltage port of the sub-module, further comprising:
and starting the oscilloscope, and adjusting the electromagnetic pulse generator according to the monitored waveform of the oscilloscope, so that the electromagnetic pulse generator generates transient electromagnetic pulses of the voltage grade specified in the pre-established test plan.
3. The converter valve sub-module high-voltage port transient electromagnetic pulse injection testing method of claim 1,
and 3) injecting transient electromagnetic pulse into the high-voltage port of the sub-module,
the method for injecting the high-voltage transient electromagnetic pulse into the high-voltage port of the sub-module comprises a common mode injection mode and a differential mode injection mode;
when the electromagnetic interference mode to be simulated in the pre-made test plan is common-mode electromagnetic interference, adopting a common-mode injection mode;
and when the electromagnetic interference mode to be simulated in the pre-established test plan is differential mode electromagnetic interference, adopting a differential mode injection mode.
4. The converter valve sub-module high-voltage port transient electromagnetic pulse injection testing method of claim 3,
the high-voltage coupling and decoupling network comprises a grounding terminal, a high-voltage terminal and a neutral line terminal;
the common mode injection mode comprises the following steps:
connecting the ground terminal and the high-voltage terminal with the high-voltage port of the sub-module respectively;
the differential mode injection mode comprises the following steps:
connecting the high voltage terminal and the neutral terminal with the sub-module high voltage port, respectively.
5. The soft DC converter valve submodule high-voltage port transient electromagnetic pulse injection testing method of claim 1, wherein,
the electromagnetic interference test equipment comprises an industrial control computer provided with an acquisition board card and a drive board card;
and 4) determining the immunity of the submodule monitoring circuit board to the transient electromagnetic pulse, wherein the immunity comprises the following steps:
judging whether the monitoring data is within a preset threshold range;
if the current is within the threshold range, the submodule monitoring circuit board can still normally work after being subjected to electromagnetic interference;
if the current is not within the threshold range, the submodule is judged to monitor that the circuit board cannot work normally after being subjected to electromagnetic interference.
6. The soft DC converter valve submodule high-voltage port transient electromagnetic pulse injection testing method of claim 1, wherein,
the high-voltage coupling and decoupling network comprises a pulse input port which is connected with the electromagnetic pulse generator;
the high voltage coupling and decoupling network includes a dc input port that is subject to a dc input voltage of 2.2 kV.
7. The soft DC converter valve submodule high-voltage port transient electromagnetic pulse injection testing method of claim 1, wherein,
the oscilloscope is powered by a battery or an isolation transformer.
8. The soft DC converter valve submodule high-voltage port transient electromagnetic pulse injection testing method of claim 1, wherein,
the electromagnetic pulse generator is powered by alternating current 220V;
when the output of the high-voltage direct-current power supply is a direct-current voltage of 2.2kV, the transient electromagnetic pulse comprises:
a surge signal having a voltage of 2kV, 3kV or 4 kV;
an electrical fast transient pulse burst at a voltage of 2kV, 3kV, or 4 kV;
the damped oscillation wave has a voltage of 2kV, 3kV, or 4 kV.
9. The utility model provides a converter valve submodule piece high pressure port transient state electromagnetic pulse pours into test system which characterized in that includes:
the tested flexible straight converter valve sub-module;
a high voltage direct current power supply;
an electromagnetic pulse generator;
a high voltage coupling decoupling network;
an electromagnetic interference test device;
the tested compliant converter valve sub-module, the high voltage dc power supply, the electromagnetic pulse generator, the high voltage coupling and decoupling network, and the electromagnetic interference testing apparatus perform the transient electromagnetic pulse injection test as claimed in any one of claims 1 to 8.
10. The FLC sub-module high-voltage port transient electromagnetic pulse injection testing system of claim 9,
the high-voltage coupling and decoupling network comprises a pulse input port which is connected with the electromagnetic pulse generator;
the high voltage coupling and decoupling network includes a dc input port that is subject to a dc input voltage of 2.2 kV.
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