CN109100590B - Test power supply and cascading static synchronous compensator converter valve test system - Google Patents
Test power supply and cascading static synchronous compensator converter valve test system Download PDFInfo
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- CN109100590B CN109100590B CN201810810694.3A CN201810810694A CN109100590B CN 109100590 B CN109100590 B CN 109100590B CN 201810810694 A CN201810810694 A CN 201810810694A CN 109100590 B CN109100590 B CN 109100590B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention discloses a test power supply and a cascading static synchronous compensator converter valve test system. The testing system comprises a testing power supply with adjustable output voltage and frequency, a tested converter valve, a control device and a human-computer interaction system. The test power supply is connected with the primary side of the multiple phase-shifting transformer through an alternating current power supply, each secondary side of the transformer is connected with the rectifying module and outputs to the direct current bus, and the direct current bus, the inverting module and the connecting reactance are sequentially cascaded to output. The control device synchronously adjusts the test power supply and the tested converter valve through optical fiber communication. The converter valve testing system has the characteristics of integration, universality, adjustable voltage and frequency, high automation degree, suitability for system tests and the like. The invention also discloses a test method of the converter valve test system of the cascading static synchronous compensator.
Description
Technical Field
The invention belongs to the technical field of high-power electronics, and particularly relates to a test power supply and a cascading static synchronous compensator converter valve test system.
Background
The static synchronous compensator is voltage source type current conversion equipment based on a fully-controlled semiconductor switching device, and is the leading technical route and the future development direction for applying a high-power electronic technology to the improvement of the quality of electric energy. The cascade topology is the most effective scheme and trend of the static synchronous compensator towards the direction of high voltage grade and large capacity.
The static synchronous compensator is widely applied to various scenes such as power transmission and distribution grids of various voltage grades, various industrial and mining enterprises, wind power and photovoltaic power stations, direct-current power transmission converter stations and the like. In order to ensure the effectiveness, stability, reliability and safety of the static synchronous compensator in application, a complete factory test and a complete system test are required to be carried out on the converter valve of the static synchronous compensator so as to verify the operation performance of the converter valve under various working conditions.
The existing testing means is based on that two sets of tested converter valves are connected to an alternating current network for power generation in a factory to carry out a push operation test. The test is not systematic, each test needs to be carried out by a separate test arrangement, and the test process is complex and tedious. The existing testing means can only test a few types of converter valves under the condition of voltage grade and frequency of an alternating current grid produced in a fixed factory, and can not provide the test conditions of the converter valves with different frequencies for various voltage grades and overseas requirements. The existing testing means can not realize the system tests such as high voltage ride through, low voltage ride through and the like.
The converter valve testing system is provided to solve the problems.
Disclosure of Invention
The invention provides a test power supply and a cascading static synchronous compensator converter valve test system, which have the characteristics of integration, universality, adjustable voltage and frequency, high automation degree, suitability for system tests and the like.
In order to achieve the purpose, the invention adopts the following specific scheme:
a test power supply comprises a multiple phase-shifting transformer, a reactor and N power supply modules which are formed by connecting a rectifier module, a voltage stabilizing capacitor and an inverter module in series, wherein N is more than or equal to 2, a primary coil of the multiple phase-shifting transformer is connected with an alternating current power supply, the multiple phase-shifting transformer comprises N secondary coils, each secondary coil is connected with a power supply module, alternating current output ends of the power supply modules are sequentially connected in series end to end and are used as output ends of the test power supply after being connected with the reactor in series.
In the above scheme, the rectifier module is a three-phase bridge rectifier circuit formed by diodes or a three-phase bridge rectifier circuit formed by fully-controlled power semiconductor devices.
In the above scheme, the inverter module is an H-bridge inverter circuit formed by fully-controlled power semiconductor devices.
The invention also correspondingly provides a system for testing the converter valve of the cascading static synchronous compensator, which comprises a test power supply and the converter valve to be tested: the test power supply comprises a multiple phase-shifting transformer, a reactor and N power supply modules which are formed by connecting a rectifier module, a voltage stabilizing capacitor and an inverter module in series, wherein N is more than or equal to 2, a primary coil of the multiple phase-shifting transformer is connected with an alternating current power supply, the multiple phase-shifting transformer comprises N secondary coils, each secondary coil is connected with a power supply module, alternating current output ends of the power supply modules are sequentially connected in series end to end and serve as the output end of the test power supply after being connected with the reactor in series, and the output end of the test power supply is connected with a tested converter valve.
The converter valve to be tested of the converter valve testing system comprises M power modules, wherein M is larger than or equal to 2, and the M power modules are sequentially connected in series end to end.
The converter valve testing system further comprises a control device, and the control device can control the test power supply and the tested converter valve to work.
The converter valve testing system further comprises a human-computer interaction system, and the human-computer interaction system is communicated with the control device.
The rectifier module is a three-phase bridge rectifier circuit formed by diodes.
The rectification module is a three-phase bridge rectification circuit formed by a fully-controlled power semiconductor device.
The inversion module is an H-bridge type inversion circuit formed by fully-controlled power semiconductor devices.
And the power module in the converter valve to be tested is an H-bridge inverter circuit formed by a fully-controlled power semiconductor device.
The invention also discloses a control method of the cascading static synchronous compensator converter valve test system, which comprises the following steps:
step 1: switching on the alternating current power supply, and simultaneously starting all the rectifier modules and charging corresponding direct current buses;
step 2: when all the direct current buses reach the minimum working voltage of the inversion module, the control system obtains a ready feedback signal and sends an unlocking instruction to the inversion module;
and step 3: after the inversion module is unlocked, the modulation ratio is gradually increased from zero through a PWM (pulse-width modulation) mode, the output alternating-current voltage is gradually increased, and the converter valve to be tested is charged;
and 4, step 4: after the tested converter valve is charged, the control system sends an unlocking instruction to the tested converter valve, and the control system simultaneously performs coordination control on the PWM modulation ratios of the test power supply and the tested converter valve so that the voltage of the alternating current bus is stabilized at the target test voltage level of the tested converter valve;
and 5: sending a power control instruction to the tested converter valve to enable the test system to operate in a power transmission state; sending out various instructions corresponding to working conditions according to the requirements of the test items, and testing; in the test process, each tested module sends telemetering and remote signaling data to the control device through the optical fiber, and the control device judges whether the test is abnormal or not according to the signals and preset logic; if the abnormal condition occurs, the control device immediately sends a locking instruction to the test power supply and the tested valve to prompt abnormal information, for example, the abnormal information is displayed on a man-machine interaction interface;
step 6: through adjusting the PWM modulation ratio, a transient low voltage or high voltage instruction is sent to a test power supply, and the high voltage ride through and low voltage ride through performance test of the tested converter valve is completed;
and 7: and after the test is finished, displaying a test result on a human-computer interaction interface.
The invention has the beneficial effects that:
(1) the whole testing system is an automatic complete set of device, the tested converter valve can be directly connected with a testing power supply, a starting loop and a switching loop of the tested valve and corresponding starting and charging steps are omitted, and complexity and operation complexity of a testing circuit are greatly simplified.
(2) The test power supply of the test system has a large-range adjustable output voltage grade, can be used for testing converter valves with various different voltage grades, and can be used for testing valve sections with various different series stages. The test power supply has an adjustable output frequency and can be used for testing converter valves used in different countries or regions. The test power supply adopts three-phase split-phase control, can be used for testing a complete three-phase converter valve of a static synchronous compensator, and can also be used for testing a single-phase valve section.
(3) The test power supply of the test system can simulate the transient overvoltage and transient undervoltage of the system to perform system tests such as high-voltage ride through and low-voltage ride through of the converter valve. The difficulty that the system test cannot be carried out due to the limitation of a factory power supply in the in-factory test is solved, and powerful support is provided for the engineering performance verification of the converter valve.
Drawings
Figure 1 is a schematic diagram of the overall system of the present invention,
number designation in the figures:
1. a test power supply; 2. a converter valve to be tested; 3. a rectification module; 4. an inversion module; 5. a power module in the converter valve to be tested; 6. a multiple phase-shifting transformer; 7. an alternating current power supply; 8. a direct current bus; 9. an alternating current output end of the test power supply; 10. a reactor; 11. a control device; 12. human-computer interaction system
FIG. 2 is an example of a three-phase test power supply and a tested valve as a complete three-phase valve;
fig. 3 shows an example of the tested valve as a single-phase cascade valve section.
Detailed Description
The invention will be further explained with reference to the drawings.
Fig. 1 shows a schematic diagram of the overall system of the present invention. The invention provides a test power supply which comprises a multiple phase-shifting transformer, a reactor and N power supply modules, wherein the N power supply modules are formed by serially connecting a rectifier module, a voltage stabilizing capacitor and an inverter module, N is more than or equal to 2, a primary coil of the multiple phase-shifting transformer is connected with an alternating current power supply, the multiple phase-shifting transformer comprises N secondary coils, each secondary coil is connected with one power supply module, alternating current output ends of the power supply modules are sequentially connected in series end to end, and the alternating current output ends of the power supply modules are connected with the reactor in series to serve as the.
The rectification module is a three-phase bridge rectification circuit formed by diodes or a three-phase bridge rectification circuit formed by fully-controlled power semiconductor devices.
The inversion module is an H-bridge type inversion circuit formed by fully-controlled power semiconductor devices.
As shown in fig. 1, the invention also discloses a converter valve testing system of a cascading static synchronous compensator, which comprises a test power supply and a tested converter valve: the test power supply comprises a multiple phase-shifting transformer, a reactor and N power supply modules which are formed by connecting a rectifier module, a voltage stabilizing capacitor and an inverter module in series, wherein N is more than or equal to 2, a primary coil of the multiple phase-shifting transformer is connected with an alternating current power supply, the multiple phase-shifting transformer comprises N secondary coils, each secondary coil is connected with a power supply module, alternating current output ends of the power supply modules are sequentially connected in series end to end and serve as the output end of the test power supply after being connected with the reactor in series, and the output end of the test power supply is connected with a tested converter valve.
The converter valve to be tested of the converter valve testing system comprises M power modules, wherein M is larger than or equal to 2, and the M power modules are sequentially connected in series end to end.
The converter valve testing system further comprises a control device, and the control device can control the test power supply and the tested converter valve to work.
The converter valve testing system further comprises a human-computer interaction system, and the human-computer interaction system is communicated with the control device.
The rectifier module is a three-phase bridge rectifier circuit formed by diodes.
The rectification module is a three-phase bridge rectification circuit formed by a fully-controlled power semiconductor device.
The inversion module is an H-bridge type inversion circuit formed by fully-controlled power semiconductor devices.
And the power module in the converter valve to be tested is an H-bridge inverter circuit formed by a fully-controlled power semiconductor device.
The serial number of the test power supply modules can reach 18 as the serial number N on the basis of selecting reasonable repeated numbers of the phase-shifting transformers. The voltage working range of each independent direct current bus is 400V-2300V. The output alternating voltage of the test power supply is 0-42 kV, and the output frequency is 0-100 Hz. The selectable range of the series connection stage number M of the tested converter valve (valve section) is 5-80.
As shown in fig. 2, the test power supply is a three-phase power supply, and the valve to be tested is a complete set of three-phase converter valves of a static synchronous compensator.
As shown in FIG. 3, the test power supply adopts split-phase control, and the tested valve is a single-phase valve section of module cascade.
The invention also comprises a control method of the converter valve test system, which comprises the following steps:
step 1: switching on the alternating current power supply, and simultaneously starting all the rectifier modules and charging corresponding direct current buses;
step 2: when all the direct current buses reach the minimum working voltage of the inversion module, the control system obtains a ready feedback signal and sends an unlocking instruction to the inversion module;
and step 3: after the inversion module is unlocked, the modulation ratio is gradually increased from zero through a PWM (pulse-width modulation) mode, the output alternating-current voltage is gradually increased, and the converter valve to be tested is charged;
and 4, step 4: after the tested converter valve is charged, the control system sends an unlocking instruction to the tested converter valve, and the control system simultaneously performs coordination control on the PWM modulation ratios of the test power supply and the tested converter valve so that the voltage of the alternating current bus is stabilized at the target test voltage level of the tested converter valve;
and 5: sending a power control instruction to the tested converter valve to enable the test system to operate in a power transmission state; sending out various instructions corresponding to working conditions according to the requirements of the test items, and testing; in the test process, each tested module sends telemetering and remote signaling data to the control device through the optical fiber, and the control device judges whether the test is abnormal or not according to the signals and preset logic; if the abnormal condition occurs, the control device immediately sends a locking instruction to the test power supply and the tested valve, and abnormal information is displayed on a human-computer interaction interface;
step 6: through adjusting the PWM modulation ratio, a transient low voltage or high voltage instruction is sent to a test power supply, and the high voltage ride through and low voltage ride through performance test of the tested converter valve is completed;
and 7: and after the test is finished, displaying a test result on a human-computer interaction interface.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and various modifications or changes made with reference to the above embodiments are within the scope of the present invention.
Claims (9)
1. A test control method of a cascading static synchronous compensator converter valve test system comprises a test power supply and a tested converter valve; the test power supply comprises a multiple phase-shifting transformer, a reactor and N power supply modules which are formed by connecting a rectifier module, a voltage stabilizing capacitor and an inverter module in series, wherein N is more than or equal to 2, a primary coil of the multiple phase-shifting transformer is connected with an alternating current power supply, the multiple phase-shifting transformer comprises N secondary coils, each secondary coil is connected with a power supply module, alternating current output ends of the power supply modules are sequentially connected in series end to end and are connected with the reactor in series to serve as the output end of the test power supply, and the output end of the test power supply is connected with a converter valve to;
the test control method is characterized by comprising the following steps:
step 1: switching on the alternating current power supply, and simultaneously starting all the rectifier modules and charging corresponding direct current buses;
step 2: when all the direct current buses reach the minimum working voltage of the inversion module, the control system obtains a ready feedback signal and sends an unlocking instruction to the inversion module;
and step 3: after the inversion module is unlocked, the modulation ratio is gradually increased from zero through a PWM (pulse-width modulation) mode, the output alternating-current voltage is gradually increased, and the converter valve to be tested is charged;
and 4, step 4: after the tested converter valve is charged, the control system sends an unlocking instruction to the tested converter valve, and the control system simultaneously performs coordination control on the PWM modulation ratios of the test power supply and the tested converter valve so that the voltage of the alternating current bus is stabilized at the target test voltage level of the tested converter valve;
and 5: sending a power control instruction to the tested converter valve to enable the test system to operate in a power transmission state; sending out various instructions corresponding to working conditions according to the requirements of the test items, and testing; in the test process, each tested module sends telemetering and remote signaling data to the control device through the optical fiber, and the control device judges whether the test is abnormal or not according to the signals and preset logic; if the abnormal condition occurs, the control device immediately sends a locking instruction to the test power supply and the tested valve and prompts abnormal information.
2. The test control method of the cascading static synchronous compensator converter valve test system of claim 1, characterized by comprising the following steps: the tested converter valve of the converter valve testing system comprises M power modules, wherein M is more than or equal to 2, and the M power modules are sequentially connected in series end to end.
3. The test control method of the cascading static synchronous compensator converter valve test system of claim 1, characterized by comprising the following steps: the converter valve testing system further comprises a control device, and the control device can control the test power supply and the tested converter valve to work.
4. The test control method of the cascading static synchronous compensator converter valve test system of claim 1, characterized by comprising the following steps: the converter valve testing system further comprises a human-computer interaction system, and the human-computer interaction system is communicated with the control device.
5. The test control method of the cascading static synchronous compensator converter valve test system of claim 1, characterized by comprising the following steps: the rectification module is a three-phase bridge rectification circuit formed by diodes or a three-phase bridge rectification circuit formed by fully-controlled power semiconductor devices.
6. The test control method of the cascading static synchronous compensator converter valve test system of claim 1, characterized by comprising the following steps: the inversion module is an H-bridge type inversion circuit formed by fully-controlled power semiconductor devices.
7. The test control method of the cascading static synchronous compensator converter valve test system as claimed in claim 2, characterized in that: and the power module in the tested converter valve is an H-bridge inverter circuit formed by a fully-controlled power semiconductor device.
8. The test control method of the cascading static synchronous compensator converter valve test system of claim 1, characterized by comprising the following steps: also comprises
Step 6: and (3) sending a transient low-voltage or high-voltage instruction to the test power supply by adjusting the PWM (pulse width modulation) ratio to finish the high-voltage ride-through and low-voltage ride-through performance test of the tested converter valve.
9. The test control method of the cascading static synchronous compensator converter valve test system of claim 1, characterized by comprising the following steps: and after the test is finished, displaying a test result on a human-computer interaction interface.
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| CN113567107B (en) * | 2021-06-15 | 2024-09-13 | 南京南瑞继保电气有限公司 | Cascaded converter valve testing system and control method thereof |
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| CN116381395B (en) * | 2023-06-05 | 2023-08-01 | 北京市轨道交通运营管理有限公司 | Power converter valve group opposite-impact test platform and test method |
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