CN112130013A - MMC converter valve low-pressure pressurization test system and method thereof - Google Patents
MMC converter valve low-pressure pressurization test system and method thereof Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
A MMC converter valve low pressure pressurization test system and method, the system includes the valve control test backstage, is used for monitoring MMC converter valve running state, and set up the operational mode of the valve control system; the low-voltage pressurizing device is used for applying voltage to the MMC converter valve submodule; and the monitoring test background is used for issuing a test instruction to the test system, monitoring a test state and outputting a result. The invention constructs a monitoring test background and a low-pressure pressurization test mode of the valve control system, the valve control system can perform corresponding project test according to an instruction issued by the monitoring test background in the low-pressure pressurization test mode, the monitoring test background can judge the running condition of the whole converter valve system according to data returned by the valve control system, the MMC sub-module function, the MMC converter valve and valve control system communication link and the basic function of the valve control system are included, and the problem that the communication link of the MMC converter valve and the valve control system and the basic function of the valve control system cannot be tested in the existing method is solved.
Description
Technical Field
The invention relates to the technical field of field debugging of flexible direct current transmission engineering, in particular to a low-voltage pressurization test system and method for an MMC converter valve.
Background
The flexible direct current transmission is a new generation direct current transmission technology taking a voltage source converter as a core, a converter valve is a core unit for completing electric energy conversion in a flexible direct current transmission project, and the converter valve adopting an MMC technical route is formed by connecting power modules in series. Along with the improvement of voltage level and capacity, converter valve submodule quantity is huge day by day, mainly through portable submodule piece tester to MMC valve tower test at present, through plug optic fibre mode, test each submodule piece alone, firstly the test is more troublesome, need take the tester on the tower to provide the tester power, secondly need pull out optic fibre, destroyed original system connection, can not test MMC submodule piece and valve accuse system communication and the basic function of valve accuse in batches moreover.
Disclosure of Invention
The invention aims to provide a low-pressure pressurization test system and a low-pressure pressurization test method for an MMC converter valve, and aims to solve the problem that the existing field test for the converter valve system is not comprehensive.
In order to solve the problems, the invention adopts the following technical scheme:
the invention provides a MMC converter valve low-pressure pressurization test system in a first aspect, which comprises:
the valve control test background is used for monitoring the running state of the MMC converter valve and setting the running mode of the valve control system;
the low-voltage pressurizing device is used for applying voltage to the MMC converter valve submodule;
and the monitoring test background is used for issuing a test instruction to the test system, monitoring a test state and outputting a result.
Further, the operation mode of the valve control system set in the valve control test background comprises: the test system comprises a normal operation mode, a low-pressure pressurization test mode, a maintenance mode and/or a pole control communication test mode.
Further, the low-voltage pressurizing device applies rated voltage which can be adjusted by 0-50% to the capacitance of all or a single submodule of the MMC converter valve; the low-pressure pressurizing device comprises an overcurrent protection module and a soft start module.
Further, the test instruction issued by the monitoring test background includes: the module comprises a valve control system software version, an MMC valve tower sub-module software version, voltages acquired by sub-modules, sub-module IGBT on-off, a sub-module and valve control system communication state and/or a sub-module state.
Further, the monitoring the test status comprises: the communication state between the MMC converter valve internal systems, the voltage acquisition of the MMC converter valve, the execution of the instruction by the MMC converter valve submodule and the data of the instruction issued by the valve control system and/or the fault analysis of the MMC submodule are realized.
The invention provides a MMC converter valve low-pressure pressurization test method, which is executed by adopting the MMC converter valve low-pressure pressurization test system and comprises the following steps:
issuing a low-pressure pressurization test mode to the valve control system through a valve control test background;
supplying power to a capacitor of the submodule of the MMC converter valve through a low-voltage pressurizing device;
and the monitoring test background sends a test instruction to the MMC converter valve submodule and the valve control system thereof, and the test is automatically started. The test object comprises the MMC converter valve sub-module and the valve control system thereof, the original system optical fiber connection is not required to be damaged, and the function of the MMC converter valve system can be comprehensively verified at the same time. Verifying the function of the whole MMC converter valve system comprises the following steps: the normal function of the MMC converter valve submodule, the communication function of the MMC converter valve submodule and the valve control system, the control function of the valve control system and the analysis when a fault occurs.
Further, the step of issuing a low-pressure pressurization test mode to the valve control system through the valve control test background comprises: the valve control test background sets the running state of the valve control system into an overhaul mode, then sets the running state of the valve control system into a low-pressure pressurization test mode, and the valve control system can forcibly send a converter valve which does not have normal running conditions to the pole control system;
after the test is finished, the valve control test background issues a low-pressure pressurization test mode to the valve control system to be invalid, an overhaul mode to be invalid, and the valve control system enters a normal operation mode.
The valve control test background is set to be in an overhaul mode firstly, a low-pressure-sending pressurization test mode can be set, and the converter valve is forcedly sent to the pole control system without normal operation conditions; in the operation mode, the low-pressure pressurization test mode can be automatically shielded, so that the converter valve is prevented from being abnormally operated under the normal working condition because the low-pressure pressurization test mode is not cancelled.
Furthermore, the low-voltage pressurizing device supplies power to all or part of the MMC converter valve sub-modules or a single MMC converter valve sub-module, and rated voltage which can be adjusted by 0-50% is applied.
Further, the test instructions include: the module comprises a valve control system software version, an MMC valve tower submodule software version, voltage collected by a submodule, a submodule IGBT (insulated gate bipolar translator) on-off state, a submodule and valve control system communication state and a submodule state.
Further, when a fault occurs in the test process, stopping the test and displaying a fault code;
and when no fault occurs in the test process, displaying that the test result is qualified after the test is finished, and outputting a report.
When a fault occurs, the power-on of the fault module can be independently tested according to fault analysis.
In summary, the invention provides a system and a method for a low-pressure pressurization test of an MMC converter valve, wherein the system comprises a valve control test background for monitoring the running state of the MMC converter valve and setting the running mode of a valve control system; the low-voltage pressurizing device is used for applying voltage to the MMC converter valve submodule; and the monitoring test background is used for issuing a test instruction to the test system, monitoring a test state and outputting a result. The invention constructs a monitoring test background and a low-pressure pressurization test mode of the valve control system, the valve control system can perform corresponding project test according to an instruction issued by the monitoring test background in the low-pressure pressurization test mode, the monitoring test background can judge the running condition of the whole converter valve system according to data returned by the valve control system, the MMC sub-module function, the MMC converter valve and valve control system communication link and the basic function of the valve control system are included, and the problem that the communication link of the MMC converter valve and the valve control system and the basic function of the valve control system cannot be tested in the existing method is solved.
Drawings
FIG. 1 is a schematic diagram of a MMC converter valve low-pressure pressurization test system in an example of the MMC converter valve low-pressure pressurization test system of the present invention;
FIG. 2 is a schematic diagram of a test flow of an MMC converter valve low-pressure pressurization test system in an embodiment of the MMC converter valve low-pressure pressurization test method of the present invention;
FIG. 3 is a schematic flow chart of the MMC converter valve low-pressure pressurization test method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The invention provides a low-pressure pressurization test system for an MMC converter valve, which comprises a valve control test background, a low-pressure pressurization device and a monitoring test background, wherein the low-pressure pressurization test system is shown in figure 1. The valve control test background is used for monitoring the running state of the MMC converter valve and setting the running mode of the valve control system; the low-voltage pressurizing device is used for applying voltage to the MMC converter valve submodule; and the monitoring test background is used for issuing a test instruction to the test system, monitoring a test state and outputting a result. And the valve control test background issues a valve control system overhaul mode and a low-pressure pressurization test mode, the low-pressure pressurization device applies voltage to the MMC sub-module capacitor, the monitoring test background issues a test instruction, the valve control system completes the test according to the instruction and returns back to background data, and the monitoring test background makes a judgment according to the returned data and outputs a report.
The low-voltage pressurizing device of the embodiment takes a direct-current power supply device capable of outputting adjustable power as an example, an output loop is connected with a soft start resistor in series and is connected with a discharge resistor in parallel (the soft start resistor is only used for discharging capacitor voltage of a sub-module of a valve tower during power failure and can automatically control switching).
Further, the operation mode of the valve control system set in the valve control test background comprises: the test system comprises a normal operation mode, a low-pressure pressurization test mode, a maintenance mode and/or a pole control communication test mode. The valve control test background and the valve control system of the embodiment transmit data through a standard protocol, and issue various modes (a normal operation mode, a low-pressure pressurization test mode, an overhaul mode, a polar control communication test mode and the like) of the valve control system and upload all states of the valve control system are carried out. The valve control background is set to be in an overhaul mode firstly, a low-pressure-sending pressurization test mode can be set, and the converter valve is forced to send a normal running condition to the pole control system; in the operation mode, the low-pressure pressurization test mode can be automatically shielded, so that the converter valve is prevented from being abnormally operated under the normal working condition because the low-pressure pressurization test mode is not cancelled. As other embodiments, the valve control background and the valve control system can be added with other operation modes.
Further, the low-voltage pressurizing device applies rated voltage which can be adjusted by 0-50% to the capacitance of all or a single submodule of the MMC converter valve; the low-pressure pressurizing device comprises an overcurrent protection module and a soft start module. The test system can simultaneously test the whole MMC valve tower sub-modules and can also independently test some bridge arms or some sub-modules.
Further, the test instruction issued by the monitoring test background includes: the module comprises a valve control system software version, an MMC valve tower sub-module software version, voltages acquired by sub-modules, sub-module IGBT on-off, a sub-module and valve control system communication state and/or a sub-module state. Specifically, the monitoring test background and the valve control of this embodiment transmit data through a standard protocol, the test flow is as shown in fig. 2, and the instructions issued in sequence after the monitoring test background issues the test start include: the system comprises a voltage monitoring module, a submodule IGBT (insulated gate bipolar transistor) on-off control module, a submodule and valve control system communication state test module, a submodule state test module and the like, wherein the voltage monitoring module collects voltage, the submodule IGBT on-off control module, the submodule and valve control system communication state test module, the submodule state test module and the like, the valve control system can test items such as the voltage, the submodule IGBT on-off control module, the submodule and valve control system communication state and the submodule state according to instructions issued by a monitoring test background in sequence, and the. As other embodiments, the monitoring test background may add other test items.
Further, the monitoring the test status comprises: the communication state between the MMC converter valve internal systems, the voltage acquisition of the MMC converter valve, the execution of the instruction by the MMC converter valve submodule and the data of the instruction issued by the valve control system and/or the fault analysis of the MMC submodule are realized.
A second aspect of the present invention provides an MMC converter valve low-pressure pressurization test method, which is implemented by using the MMC converter valve low-pressure pressurization test system as described above, and as shown in fig. 3, includes the following steps:
and S100, issuing a low-pressure pressurization test mode to the valve control system through the valve control test background. The valve control test background sets the running state of the valve control system into an overhaul mode, then sets the running state into a low-pressure pressurization test mode, the valve control system can forcibly send the converter valve to the pole control system without normal running conditions, and the low-pressure pressurization test mode can be automatically shielded in the running mode, so that the converter valve is prevented from running abnormally due to the fact that the low-pressure pressurization test mode is not cancelled in normal working conditions. The valve control system is a lower-layer control link of the converter valve, the whole converter valve needs to operate the pole control system to issue an instruction to the valve control system, the pole control system is directly operated by a user, and the valve control overhaul and test mode is not a normal operation mode, so that the pole control system does not issue an instruction for operating the converter valve when the converter valve is not in a normal operation condition. After the test is finished, the valve control test background issues a low-pressure pressurization test mode to the valve control system to be invalid, an overhaul mode to be invalid, and the valve control system enters a normal operation mode.
And step S200, supplying power to a capacitor of the submodule of the MMC converter valve through a low-voltage pressurizing device. In the low-pressure pressurization test mode, the valve control system can test the software version of the valve control system, the software version of the submodule of the MMC valve tower, the voltage acquired by the submodule, the on/off state of the IGBT (insulated gate bipolar translator) of the submodule, the communication state of the submodule and the valve control system, the state of the submodule and the like according to the instruction issued by the monitoring test background.
And step S300, issuing a test instruction to the MMC converter valve sub-module and the valve control system thereof by the monitoring test background, and automatically starting the test. The monitoring test background can issue a test instruction, automatically monitor the test state in real time and output a test report.
The test object comprises the MMC converter valve sub-module and the valve control system thereof, the original system optical fiber connection is not required to be damaged, and the function of the MMC converter valve system can be comprehensively verified at the same time. Verifying the function of the whole MMC converter valve system comprises the following steps: the normal function of the MMC converter valve submodule, the communication function of the MMC converter valve submodule and the valve control system, the control function of the valve control system and the analysis when a fault occurs.
Furthermore, the low-voltage pressurizing device supplies power to all or part of the MMC converter valve sub-modules or a single MMC converter valve sub-module, and rated voltage which can be adjusted by 0-50% is applied.
Further, the test instructions include: the module comprises a valve control system software version, an MMC valve tower submodule software version, voltage collected by a submodule, a submodule IGBT (insulated gate bipolar translator) on-off state, a submodule and valve control system communication state and a submodule state.
The monitoring test status includes, but is not limited to: the method comprises the steps of analyzing the total state of a valve control system, the software version of the valve control system, the software version of a submodule of an MMC valve tower, the voltage collected by the submodule, the on and off of an IGBT (insulated gate bipolar translator) of the submodule, the communication state of the submodule and the valve control system, the state of the submodule and the fault generated in the test.
Further, when a fault occurs in the test process, stopping the test and displaying a fault code; and when no fault occurs in the test process, displaying that the test result is qualified after the test is finished, and outputting a report.
When a fault occurs, the power-on of the fault module can be independently tested according to fault analysis.
The embodiment is described by testing a single submodule and a valve control system thereof, and as other embodiments, a test object can expand a plurality of submodules or the whole valve tower.
The MMC converter valve low-pressure pressurization test method of the embodiment takes the test of a plurality of modules as an example, and comprises the following steps:
issuing an overhaul mode and a low-pressure pressurization test mode to the valve control system through the valve control test background;
the monitoring test background is connected and opened to see that the 6 bridge arm valve control low-pressure pressurization test mode is effective, and the valve control general state is normal. Setting a software version of a valve control system, a software version of a sub-module and a lowest voltage value Vset of the sub-module (the lowest voltage value is the minimum voltage value judged by module voltage acquisition);
the capacitor of the submodule of the MMC converter valve is supplied with power through the low-voltage pressurizing device, when the voltage of the capacitor applied to the submodule by the low-voltage pressurizing device reaches Vset, the background can display the position number of the current module, and the test start-stop button is clicked at the moment to automatically start the test. And when a fault occurs in the test, stopping the test, displaying a fault code, if no fault exists, displaying that the total test result is qualified after the test is finished, and then clicking to output a report. And finally, clicking a test start-stop button to stop the test and carrying out the next test. Repeating the step 3;
after all tests are finished, a low-pressure pressurization test mode issued to the valve control system by the valve control background is invalid, an overhaul mode is invalid, and the system enters a normal operation mode and has normal operation conditions. The monitoring test background does not need to be used any more.
In summary, the invention provides a system and a method for a low-pressure pressurization test of an MMC converter valve, wherein the system comprises a valve control test background for monitoring the running state of the MMC converter valve and setting the running mode of a valve control system; the low-voltage pressurizing device is used for applying voltage to the MMC converter valve submodule; and the monitoring test background is used for issuing a test instruction to the test system, monitoring a test state and outputting a result. The invention constructs a monitoring test background and a low-pressure pressurization test mode of the valve control system, the valve control system can perform corresponding project test according to an instruction issued by the monitoring test background in the low-pressure pressurization test mode, the monitoring test background can judge the running condition of the whole converter valve system according to data returned by the valve control system, the MMC sub-module function, the MMC converter valve and valve control system communication link and the basic function of the valve control system are included, and the problem that the communication link of the MMC converter valve and the valve control system and the basic function of the valve control system cannot be tested in the existing method is solved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. The utility model provides a MMC converter valve low pressure pressurization test system which characterized in that includes:
the valve control test background is used for monitoring the running state of the MMC converter valve and setting the running mode of the valve control system;
the low-voltage pressurizing device is used for applying voltage to the MMC converter valve submodule;
and the monitoring test background is used for issuing a test instruction to the test system, monitoring a test state and outputting a result.
2. The MMC converter valve low-pressure pressurization test system of claim 1, wherein the valve control test background sets the operational mode of the valve control system comprising: the test system comprises a normal operation mode, a low-pressure pressurization test mode, a maintenance mode and/or a pole control communication test mode.
3. The MMC converter valve low-pressure pressurization test system of claim 1, wherein the low-pressure pressurization device applies an adjustable 0-50% rated voltage to the capacitance of all or a single submodule of the MMC converter valve; the low-pressure pressurizing device comprises an overcurrent protection module and a soft start module.
4. The MMC converter valve low-pressure pressurization test system of claim 1, wherein the test instructions issued by the monitoring test background comprise: the module comprises a valve control system software version, an MMC valve tower sub-module software version, voltages acquired by sub-modules, sub-module IGBT on-off, a sub-module and valve control system communication state and/or a sub-module state.
5. The MMC converter valve low-pressure pressurization test system of claim 1, wherein the monitoring test conditions comprises: the communication state between the MMC converter valve internal systems, the voltage acquisition of the MMC converter valve, the execution of the instruction by the MMC converter valve submodule and the data of the instruction issued by the valve control system and/or the fault analysis of the MMC submodule are realized.
6. An MMC converter valve low-pressure pressurization test method, characterized in that, the method is executed by the MMC converter valve low-pressure pressurization test system according to any one of claims 1-5, and comprises the following steps:
issuing a low-pressure pressurization test mode to the valve control system through a valve control test background;
supplying power to a capacitor of the submodule of the MMC converter valve through a low-voltage pressurizing device;
and the monitoring test background sends a test instruction to the MMC converter valve submodule and the valve control system thereof, and the test is automatically started.
7. The MMC converter valve low-pressure pressurization test method of claim 6,
the step of issuing a low-pressure pressurization test mode to the valve control system through the valve control test background comprises the following steps: the valve control test background sets the running state of the valve control system into an overhaul mode, then sets the running state of the valve control system into a low-pressure pressurization test mode, and the valve control system can forcibly send a converter valve which does not have normal running conditions to the pole control system;
after the test is finished, the valve control test background issues a low-pressure pressurization test mode to the valve control system to be invalid, an overhaul mode to be invalid, and the valve control system enters a normal operation mode.
8. The MMC converter valve low-pressure pressurization test method of claim 6, wherein the low-pressure pressurization device supplies power to all or part of or a single MMC converter valve sub-module, and rated voltage which can be adjusted by 0-50% is applied.
9. The MMC converter valve low-pressure pressurization test method of claim 6, wherein the test instructions comprise: the module comprises a valve control system software version, an MMC valve tower submodule software version, voltage collected by a submodule, a submodule IGBT (insulated gate bipolar translator) on-off state, a submodule and valve control system communication state and a submodule state.
10. The MMC converter valve low-pressure pressurization test method of claim 6,
when a fault occurs in the test process, stopping the test and displaying a fault code;
and when no fault occurs in the test process, displaying that the test result is qualified after the test is finished, and outputting a report.
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