CN115656682A - Converter valve thyristor control unit testing device and method - Google Patents
Converter valve thyristor control unit testing device and method Download PDFInfo
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- CN115656682A CN115656682A CN202211366781.7A CN202211366781A CN115656682A CN 115656682 A CN115656682 A CN 115656682A CN 202211366781 A CN202211366781 A CN 202211366781A CN 115656682 A CN115656682 A CN 115656682A
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Abstract
The invention relates to a testing device and a method for a thyristor control unit of a converter valve, which comprises the following steps: the thyristor-level test system is characterized in that a main control unit is respectively connected with a high-frequency signal output unit, an analog quantity acquisition unit, an optical interface and a communication interface; the high-frequency signal output unit is connected with the thyristor level to be tested and is used for applying a test signal to the thyristor level to be tested; the optical interface is connected with the thyristor level to be tested and used for applying an optical pulse test signal to the thyristor level to be tested; the analog quantity acquisition unit is connected with the thyristor level to be tested and is used for acquiring a test feedback signal of the thyristor level to be tested; the pole control signal simulation system is used for providing pole control signals for the converter valve to be tested; and the return inspection signal simulation system is used for providing a return inspection signal for the converter valve to be tested. According to the invention, different test signals are applied to the corresponding converter valve interfaces by using the thyristor-level test system, the pole control signal simulation system and the return inspection signal simulation system, so that multiple functional tests on the thyristor control units of various converter valves can be realized.
Description
Technical Field
The invention relates to the technical field of direct current transmission, in particular to a device and a method for testing a thyristor control unit of a converter valve.
Background
The converter valve is core equipment of conventional direct current and extra-high voltage direct current transmission, mainly comprises a trigger thyristor, a TVM (transient voltage monitor) plate (or TE plate, TCE (thyristor control element) plate and the like) of a thyristor voltage detection circuit, a multimode star coupler MSC, a trigger loop, a return circuit optical fiber and a VBE (or VCE, VCU and the like) system, and the reliability of the operation of a direct current transmission system can be influenced by the fault of any component.
At present, mainstream converter valve and valve control technology manufacturers have an allowance, ABB, siemens and electric Purui, the converter valve types have light control and electric control, and control protection equipment manufacturers have an allowance, ABB, siemens and Nanrui. The detection method, the detection means and the test equipment of the converter valve of each manufacturer are different, most of the test equipment and the detection method have single function, poor universality and high cost, the function detection of the converter valve system is insufficient, the full detection of a converter valve control and monitoring system consisting of valve control equipment, optical fibers and a converter valve assembly thyristor-level loop cannot be realized, and in order to fill detection leaks, improve the universality of the equipment and reduce the cost, a universal converter valve detection method is needed and is used for triggering a converter valve thyristor control unit of a direct current converter station and detecting the system level of a monitoring channel.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a testing device and a testing method for a thyristor control unit of a converter valve.
In order to achieve the purpose, the invention provides the following scheme:
a converter valve thyristor control unit testing device comprises:
the thyristor level test system comprises a main control unit, a high-frequency signal output unit, an analog quantity acquisition unit, an optical interface and a communication interface; the main control unit is respectively connected with the high-frequency signal output unit, the analog quantity acquisition unit, the optical interface and the communication interface; the high-frequency signal output unit is connected with the thyristor level to be tested and is used for applying a test signal to the thyristor level to be tested; the optical interface is connected with the thyristor level to be tested and is used for applying an optical pulse test signal to the thyristor level to be tested; the analog quantity acquisition unit is connected with the thyristor level to be tested and is used for acquiring a test feedback signal of the thyristor level to be tested;
the pole control signal simulation system is used for providing pole control signals for the converter valve to be tested;
and the return inspection signal simulation system is used for providing a return inspection signal for the converter valve to be tested.
Preferably, the method further comprises the following steps:
the input end of the isolation transformer is connected with the AC-DC power supply module; the AC-DC power supply module is used for supplying power to the thyristor-level test system.
Preferably, the method further comprises the following steps: and the PT/CT acquisition unit is respectively connected with the thyristor level to be detected and the analog quantity acquisition unit and is used for acquiring electric signals of the thyristor level to be detected.
Preferably, the communication interface is a DB9 interface; and the DB9 interface is in communication connection with an upper computer.
The invention also provides a method for testing the thyristor control unit of the converter valve, which comprises the following steps:
when the ABB valve triggering function test is carried out, a thyristor-level test system is used, alternating-current power-frequency voltage is applied to two ends of a tested thyristor level, and meanwhile, the voltage of the two ends of the tested thyristor is collected to test the tested thyristor.
Preferably, the method further comprises the following steps:
when a Siemens route converter valve triggering test is carried out, a pole control signal simulation system is used for providing a pole control signal for a CLC interface of the Siemens route converter valve; outputting a return inspection signal generated by a return inspection signal simulation system to a VBE-LR interface of the Siemens route converter valve; and applying voltage to two ends of the cathode and the anode of the single-stage thyristor of the Siemens route converter valve by using a thyristor-level test system, and detecting the thyristor level according to the acquired voltage and current at the two ends of the thyristor level.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a testing device and a testing method for thyristor control units of converter valves, and the testing device and the testing method can be used for applying different testing signals on corresponding converter valve interfaces by utilizing a thyristor-level testing system, a pole control signal simulation system and a return inspection signal simulation system, so that multiple functional tests on various thyristor control units of converter valves can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a thyristor-level test system according to an embodiment of the present invention;
FIG. 2 is a diagram of the thyristor level test system control hardware architecture in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a polar control signal simulation system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a return test signal simulation system according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an ABB valve control loop detection system in an embodiment provided by the invention;
FIG. 6 is a schematic diagram of a Siemens valve control loop detection system in an embodiment provided by the present invention;
fig. 7 is a timing diagram of signals between systems during the siemens valve triggering function test in the embodiment of the present invention.
Description of the symbols:
1. trigger signal (valve control-thyristor level); 2. analog trigger synchronization signal FCS (polar control signal analog system-valve control); 3. simulating a return inspection signal (return inspection signal simulation system-valve control); 4. voltage synchronization signal (thyristor level test system-return test signal simulation system); 5. a thyristor-level voltage waveform u (t); 6. the thyristor level test device outputs a voltage waveform.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
In the direct current transmission project, a plurality of thyristor elements are connected in series to form a single converter valve, and the equipment of the whole converter valve control system is divided into a plurality of parts: (1) polar control System (PCP): finishing the calculation of the trigger angle, generating a trigger control pulse (FCS/CP) and a control signal and sending the FCS/CP and the control signal to a valve control system; (2) valve control system (VBE/VCU/VCE): receiving trigger control pulse and control signal from the pole control system, generating trigger pulse (FP) and sending to the thyristor, collecting the return pulse signal of the thyristor, analyzing and processing, and sending the information of the valve control system to the pole control system; (3) thyristor control unit (TFM/TCU/TCE): and receiving the trigger pulse of the valve control system, generating gate pulse to conduct the thyristor and realizing the related protection function of the thyristor.
The invention researches a universal converter valve detection method by researching the Siemens and ABB technology line converter valve control equipment control principle, interface characteristics, trigger circuit principle and the working principle of each component of the converter valve, can be compatible with line converter valve control systems of different technologies, and realizes the system level detection of the converter valve triggering and monitoring channels, wherein the system level detection comprises a valve control unit, a TVM (transient voltage suppressor) board, a return detection optical fiber, a triggering optical fiber, an MSC (switch center) and the like.
The content of the invention is realized by the following technical scheme:
1. the Siemens route light-operated converter valve fault detection method is provided with an interface of a converter valve control system of an ABB route, and meanwhile, the Siemens route light-operated converter valve fault detection method has the function of realizing the integral detection of valve control loops of the ABB route and the Siemens route converter valves.
2. The test system comprises a return inspection signal simulation system, a polar control signal simulation system and a configuration scheme of a thyristor-level test system. The pole control signal simulation system and the return inspection signal simulation system generate corresponding control signals on the converter valve control equipment side to meet the condition that the valve control equipment sends out thyristor-level trigger pulses, and the thyristor-level test system applies test voltage to two ends of a thyristor level and collects the voltage of the two ends of the thyristor to judge whether the functions of the thyristor and the auxiliary equipment of the thyristor are normal or not.
3. The thyristor-level test system can output 600V alternating-current voltage to the thyristor level, simultaneously collect voltage signals at two ends of a tested thyristor and judge whether the thyristor-level trigger function is normal; the thyristor-level impedance detection function is achieved; the tester is provided with an RS232 communication interface and can be connected with a computer to read the state of the tester and the test result, wherein the test result comprises an impedance value, a resistance value, a capacitance value and the like.
4. The polar control signal simulation system has a polar control signal simulation function, can realize the setting of a test working mode of the valve control equipment, is connected with the VBE through a DB37 cable, and can set a control signal and a trigger synchronous control signal of the valve control equipment and indicate corresponding states.
5. The return inspection signal simulation system has a return inspection signal simulation function and can realize the establishment condition of forward voltage required by the valve control equipment to issue the trigger signal.
A converter valve thyristor control unit testing device comprises: the system comprises a thyristor-level test system, a polar control signal simulation system and a return inspection signal simulation system.
Referring to fig. 1-2, the thyristor level test system includes a main control unit, a high frequency signal output unit, an analog acquisition unit, an optical interface, a communication interface, an isolation transformer, an AC-DC power module, and a PT/CT acquisition unit; the main control unit is respectively connected with the high-frequency signal output unit, the analog quantity acquisition unit, the optical interface and the communication interface; the high-frequency signal output unit is connected with the thyristor level to be tested and is used for applying a test signal to the thyristor level to be tested; the optical interface is connected with the thyristor level to be tested and is used for applying an optical pulse test signal to the thyristor level to be tested; the analog quantity acquisition unit is connected with the thyristor level to be tested and is used for acquiring a test feedback signal of the thyristor level to be tested; the input end of the isolation transformer is connected with the AC-DC power supply module; the AC-DC power supply module is used for supplying power to the thyristor-level test system. And the PT/CT acquisition unit is respectively connected with the thyristor level to be detected and the analog quantity acquisition unit and is used for acquiring electric signals of the thyristor level to be detected. The communication interface is a DB9 interface; and the DB9 interface is in communication connection with an upper computer.
In practical application, the thyristor-level test system mainly realizes online detection of the thyristor unit on the valve component, so as to detect the trigger characteristics of the thyristor level (including the trigger detection loop) on the valve component, the thyristor state detection loop and the working state of the damping loop. The test system mainly comprises a power supply, an isolation transformer, a power resistor, a relay, a printed circuit board and the like. The circuit board comprises a main control board, an impedance test board and a voltage dividing board, wherein the main control board mainly comprises a main control unit, an input/output unit, a communication interface unit and an analog quantity acquisition unit. The control unit adopts an FPGA + ARM architecture, the FPGA mainly completes the functions of bottom layer control, high-frequency signal generation and the like, and the ARM can realize the functions of upper layer algorithm control and background communication; the opening-in and opening-out unit mainly comprises a voltage and current sampling module, an optical transceiving module and the like, and is used for opening in and opening out optical signals and electric signals; the impedance test board completes the high-frequency signal output function; the backboard provides power supply and signal connection for the board card; the voltage dividing plate is responsible for completing signal acquisition and voltage transformation of the voltage and current transformers. The RS232 is connected with the upper computer, so that the functions of modifying the test parameters and the qualified criterion requirements, displaying the test data, automatically generating the test report and the like are realized.
The trigger test is divided into two modes of local test and test with valve control equipment, alternating voltage is applied to two ends of the thyristor, a thyristor trigger signal is generated by a thyristor-level test system (or valve control equipment) and is sent to a thyristor trigger unit to trigger the thyristor, and whether the test is passed or not is displayed by detecting thyristor-level current.
When the impedance test is carried out, two frequency excitation signals are required to be applied to two ends of a thyristor level respectively, so that the impedance value of a thyristor level damping loop is measured, whether the measured values under the condition of applying the two angular frequency excitation signals are within a qualified value range is judged, and whether the test is passed is judged. The invention can communicate with the PC background through the DB9 interface, and the PC background can be used for triggering or setting parameters of impedance test items and producing test reports and the like.
Referring to fig. 3, the polar control signal simulation system has a polar control signal simulation function, and can implement setting of a test mode of the valve control device and issuing of a test signal. The main signals of the polar control signal analog output comprise CB _ ON, FP _ EN, UNDERVAT, SYS _ ACT, SYS _ PASS, FP _ EN _ NOT and BYPASS, and the trigger control signal analog output comprises 12 FCS signals. The control signal of the valve control device and the trigger control signal can be set through the touch screen and indicate corresponding states. The internal framework mainly comprises a power supply, a main control board, a voltage sampling board, a signal opening board and a touch screen.
Referring to fig. 4, the return inspection signal simulation system mainly realizes the simulation of the return inspection signal of the thyristor unit on the valve assembly, and is used for meeting the requirement of the forward voltage establishment of the valve control device on the return inspection signal in the maintenance state of the converter valve. And a power supply inlet is provided, and the power supply control of the device is realized by a ship-shaped switch. The LR plate of the light receiving plate of the valve control device is connected with the optical fiber, so that the requirements of the valve control device on the establishment of forward voltage for a return detection signal and the like are met. The internal framework mainly comprises 1 AC 220V-DC 24V power supply module and 1 light emitting plate. The power supply module is responsible for converting AC220V into DC24V to supply power for the light emitting panel, and the light emitting panel generates and outputs a return detection signal.
The invention also provides a method for testing the thyristor control unit of the converter valve, which comprises the following steps:
when the ABB valve triggering function test is carried out, a thyristor-level test system is used, alternating-current power-frequency voltage is applied to two ends of a tested thyristor level, and meanwhile, the voltage of the two ends of the tested thyristor is collected to test the tested thyristor. When a Siemens route converter valve triggering test is carried out, a pole control signal simulation system is used for providing a pole control signal for a CLC interface of the Siemens route converter valve; outputting a return inspection signal generated by a return inspection signal simulation system to a VBE-LR interface of the Siemens route converter valve; and applying voltage to two ends of the cathode and the anode of the single-stage thyristor of the Siemens route converter valve by using a thyristor-level test system, and detecting the thyristor level according to the acquired voltage and current at the two ends of the thyristor level.
This is illustrated below with reference to specific examples:
referring to fig. 5, when testing the ABB valve triggering function, only the thyristor level test system is needed. Setting valve control to enter a test mode, wherein the valve control has a trigger pulse output condition and monitors the state of the thyristor, and the thyristor-level test system applies alternating-current power frequency voltage to two ends of the tested thyristor, simultaneously collects the voltage at the two ends of the tested thyristor, and judges and indicates the thyristor-level trigger state.
Referring to fig. 6, when the siemens route converter valve triggering test is performed, a thyristor-level test system, a return inspection signal simulation system, and an extreme control signal simulation system are used in cooperation, and a control signal output command is issued by the extreme control simulation system, and a DC24V signal is output after being processed, and is matched with a VBE interface signal voltage, which mainly includes: and 12 FCS signals, signals such as CB _ ON, FP _ EN, ACTIVE, PASSIVE and the like set VBE in a normal unlocking operation mode. The control VBE sends a trigger pulse to the converter valve by outputting a return detection signal generated by the return detection signal simulation system to the VBE-LR board. The thyristor-level test system applies AC600V voltage to the two ends of the cathode and the anode of the single-stage thyristor, and detects the trigger characteristic of the thyristor level and the state of the whole trigger channel according to the voltage and the current at the two ends of the thyristor level.
It should be noted that, when the siemens valve thyristor level trigger function test is performed, the signal connection and timing coordination between each system and the valve control device are as shown in fig. 7.
The impedance test is independently completed by the thyristor-level test system, signals with different frequencies are output to two ends of a thyristor-level cathode and anode, and parameters of a thyristor-level damping loop are calculated by detecting voltage and current at two ends of the thyristor level.
Through the mode, the whole trigger test environment is a closed loop circuit consisting of the valve control equipment and an information display background thereof, a thyristor level and trigger and return detection optical fibers. The thyristor-level test system can indicate whether the thyristor level is normally triggered and whether the impedance test is normal, the information display background can display event information of the thyristor level in the test, and can indicate whether the valve control equipment recheck signal is normally received.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
1. the high-voltage test of the converter valve high-potential control protection system is realized by adopting a high-voltage simulation mode, the volume of equipment can be reduced, the voltage level is reduced, and the safety of the equipment is greatly improved.
2. By adopting the embedded processor, the system is highly integrated and automated, and the board card testing efficiency and accuracy are obviously improved.
3. The invention can quickly position the failure reason of the thyristor control unit, has obvious price advantage and can save the expenses of technical communication, service and the like required in the later period of purchasing foreign equipment.
4. The invention can cooperate with the converter valve project of early introduced foreign enterprise technology in China, and solves the urgent need in the operation and maintenance process of the converter station. The function test of the thyristor control unit can be realized, the risk caused by the safety and stability of the system when the direct current engineering fault spare parts are put into operation can be effectively avoided, and means are provided for the detection and maintenance recycling of the fault board card.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principle and the embodiment of the present invention are explained by applying specific examples, and the above description of the embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. A converter valve thyristor control unit testing arrangement which characterized in that includes:
the thyristor-level test system comprises a main control unit, a high-frequency signal output unit, an analog quantity acquisition unit, an optical interface and a communication interface; the main control unit is respectively connected with the high-frequency signal output unit, the analog quantity acquisition unit, the optical interface and the communication interface; the high-frequency signal output unit is connected with the thyristor level to be tested and is used for applying a test signal to the thyristor level to be tested; the optical interface is connected with the thyristor level to be tested and is used for applying an optical pulse test signal to the thyristor level to be tested; the analog quantity acquisition unit is connected with the thyristor level to be tested and is used for acquiring a test feedback signal of the thyristor level to be tested;
the pole control signal simulation system is used for providing pole control signals for the converter valve to be tested;
and the return inspection signal simulation system is used for providing a return inspection signal for the converter valve to be tested.
2. The converter valve thyristor control unit testing device of claim 1, further comprising:
the input end of the isolation transformer is connected with the AC-DC power supply module; the AC-DC power supply module is used for supplying power to the thyristor-level test system.
3. The converter valve thyristor control unit testing device according to claim 2, further comprising: and the PT/CT acquisition unit is respectively connected with the thyristor level to be detected and the analog quantity acquisition unit and is used for acquiring the electric signal of the thyristor level to be detected.
4. The converter valve thyristor control unit testing device according to claim 1, wherein the communication interface is a DB9 interface; and the DB9 interface is in communication connection with an upper computer.
5. A method for testing a thyristor control unit of a converter valve is characterized by comprising the following steps:
when the ABB valve triggering function test is carried out, a thyristor-level test system is used, alternating-current power-frequency voltage is applied to two ends of a tested thyristor level, and meanwhile, the voltage of the two ends of the tested thyristor is collected to test the tested thyristor.
6. The method for testing the thyristor control unit of the converter valve according to claim 5, further comprising:
when a Siemens route converter valve triggering test is carried out, an electrode control signal simulation system is used for providing an electrode control signal for a CLC interface of the Siemens route converter valve; outputting a return inspection signal generated by a return inspection signal simulation system to a VBE-LR interface of the Siemens route converter valve; and applying voltage to two ends of the cathode and the anode of the single-stage thyristor of the Siemens route converter valve by using a thyristor-level test system, and detecting the thyristor level according to the acquired voltage and current at the two ends of the thyristor level.
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| CN202211366781.7A CN115656682A (en) | 2022-11-01 | 2022-11-01 | Converter valve thyristor control unit testing device and method |
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| CN202211366781.7A CN115656682A (en) | 2022-11-01 | 2022-11-01 | Converter valve thyristor control unit testing device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116381386A (en) * | 2023-04-04 | 2023-07-04 | 北京龙腾蓝天科技有限公司 | Comprehensive testing system and method for universal high-voltage direct-current transmission converter valve |
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2022
- 2022-11-01 CN CN202211366781.7A patent/CN115656682A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116381386A (en) * | 2023-04-04 | 2023-07-04 | 北京龙腾蓝天科技有限公司 | Comprehensive testing system and method for universal high-voltage direct-current transmission converter valve |
| CN116381386B (en) * | 2023-04-04 | 2024-04-02 | 北京龙腾蓝天科技有限公司 | Comprehensive testing system and method for universal high-voltage direct-current transmission converter valve |
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