CN114647227A - Full closed loop test platform and method for high-voltage direct-current transmission valve control system - Google Patents
Full closed loop test platform and method for high-voltage direct-current transmission valve control system Download PDFInfo
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- CN114647227A CN114647227A CN202210129427.6A CN202210129427A CN114647227A CN 114647227 A CN114647227 A CN 114647227A CN 202210129427 A CN202210129427 A CN 202210129427A CN 114647227 A CN114647227 A CN 114647227A
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- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
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- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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Abstract
The invention relates to the technical field of power automation, in particular to a full closed-loop test platform and a full closed-loop test method for a high-voltage direct-current transmission valve control system. The test platform includes: the 12-pulse direct-current back-to-back physical dynamic model device is used for connecting a plurality of thyristor trigger monitoring units of the high-voltage direct-current transmission valve control system to be tested, can perform full closed-loop test on the high-voltage direct-current transmission valve control system, and can realize comprehensive test on the function and reliability of the high-voltage direct-current transmission valve control system to be tested under the full-engineering configuration of software and hardware. The system can realize the test under various conditions, and solves the problem of single test scene in the prior art.
Description
Technical Field
The invention relates to the technical field of power automation, in particular to a full closed-loop test platform and a full closed-loop test method for a high-voltage direct-current transmission valve control system.
Background
The valve control system is the brain of the direct current transmission converter valve and plays a key role in the alternating current-direct current electric energy conversion function of the converter valve. The valve control system monitors each thyristor level in the converter valve in real time, realizes the control protection strategy of the converter valve, and directly influences the safe and stable operation of the converter valve and even the whole direct current transmission project due to the reliability of the converter valve.
The high-voltage direct-current transmission valve control system mainly comprises a plurality of thyristor trigger monitoring units (TTM) and valve base electronic equipment (VBE), and is core equipment controlled by the high-voltage direct-current transmission valve control system, as shown in fig. 1. The thyristor triggering monitoring unit (TTM) is used as a converter valve bottom layer control and protection unit and mainly completes the triggering, monitoring and protecting functions of the thyristor, and the valve base electronic equipment (VBE) is an intermediate link which is connected with an upper layer control protection system and the bottom layer thyristor triggering monitoring unit and is used for receiving a control command of a higher level control protection system and realizing synchronous triggering of the multi-stage thyristor and information interaction of a multi-information-quantity state. As described above, the high-voltage direct-current transmission valve control system not only has complex functions, but also has a large number of signal interfaces and very complex logic, and the development of the interface and the functional equivalence is a difficult point.
At present, a valve control system function and reliability verification method commonly adopted by various valve control system manufacturers in China is shown in fig. 2. Specifically, the method comprises the following steps:
a discrete test method is adopted to test the high-voltage direct-current transmission valve control system, namely, the VBE uses a digital simulation platform to verify the function and the interface between the VBE and a direct-current control protection system, but lacks a TTM link and is not a complete valve control system closed-loop test platform, the interface function between valve base electronic equipment (VBE) and a thyristor trigger monitoring unit (TTM) is completed through an independent test platform, and the test platform is an open-loop test system and cannot completely and equivalently equalize various working conditions and interface characteristics of the valve control system. In addition, limited by the testing capability of the test platform, the current testing method adopts digital simulation equipment to simulate the converter valve, only can realize the function test under the simplified configuration of the valve control system, the software and hardware configuration of the valve control system participating in the test has larger difference with the actual engineering, and the software and hardware configuration is a simplified version, so that the defects of incomplete test and condition simulation under the software and hardware configuration of the valve control system engineering cannot be realized, and the like exist. That is to say, the existing test platform valve control system engineering has low equivalence, and cannot completely simulate software, hardware and interface logic of the valve control system.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a full closed-loop test platform and a full closed-loop test method for a high-voltage direct-current transmission valve control system.
The invention discloses a full closed loop test platform of a high-voltage direct-current transmission valve control system, which comprises the following technical scheme:
the method comprises the following steps: the system comprises a control protection system, high-voltage direct-current transmission thyristor-level equivalent simulation equipment and a 12-pulse direct-current back-to-back physical dynamic model device, wherein the 12-pulse direct-current back-to-back physical dynamic model device is used for connecting a plurality of thyristor trigger monitoring units of a high-voltage direct-current transmission valve control system to be tested;
the high-voltage direct-current transmission thyristor-level equivalent simulation equipment is used for: equivalently simulating the working state of valve base electronic equipment of the high-voltage direct-current transmission valve control system to be tested to obtain the operating parameter data of the valve base electronic equipment, generating a control signal according to the operating parameter data of the valve base electronic equipment, and outputting the control signal to the 12-pulse direct-current back-to-back physical dynamic model device;
the 12 pulsating direct current back-to-back physical dynamic model device is used for: controlling all thyristor trigger monitoring units to operate according to the control signal to obtain operating parameter data of all thyristor trigger monitoring units;
the control protection system is used for: and obtaining a test result of the high-voltage direct-current transmission valve control system to be tested according to the operation parameter data of the valve base electronic equipment and the operation parameter data of all thyristor trigger monitoring units.
The full closed loop test platform of the high-voltage direct-current transmission valve control system has the following beneficial effects:
the working state of valve base electronic equipment of the high-voltage direct-current transmission valve control system to be tested can be equivalently simulated through high-voltage direct-current transmission thyristor-level equivalent simulation equipment, a plurality of thyristor trigger monitoring units of the high-voltage direct-current transmission valve control system to be tested are connected to a 12-pulse direct-current back-to-back physical dynamic model device, the valve base electronic equipment and all the thyristor trigger monitoring units can be tested simultaneously, namely, a full closed-loop test can be carried out on the high-voltage direct-current transmission valve control system, the comprehensive test on the functions and the reliability of the high-voltage direct-current transmission valve control system to be tested under the full-engineering configuration of software and hardware can be realized, and the problem that the transient steady-state characteristic and the signal interface of a converter valve cannot be accurately simulated by an existing test platform based on a digital simulation system is solved.
The invention discloses a full closed loop test method of a high-voltage direct-current transmission valve control system, which adopts the technical scheme as follows:
the high-voltage direct-current transmission thyristor-level equivalent simulation equipment equivalently simulates the working state of valve base electronic equipment of a high-voltage direct-current transmission valve control system to be tested to obtain operation parameter data of the valve base electronic equipment, generates a control signal according to the operation parameter data of the valve base electronic equipment and outputs the control signal to the 12 pulsating direct-current back-to-back physical dynamic model device;
the 12-pulse direct-current back-to-back physical dynamic model device is used for connecting the thyristor trigger monitoring units of the high-voltage direct-current transmission valve control system to be tested, and controls all the thyristor trigger monitoring units to operate according to the control signal to obtain the operation parameter data of all the thyristor trigger monitoring units;
and the control protection system obtains and obtains a test result of the high-voltage direct-current transmission valve control system to be tested according to the operation parameter data of the valve base electronic equipment and the operation parameter data of all thyristor trigger monitoring units.
The full closed loop test method of the high-voltage direct current transmission valve control system has the following beneficial effects:
the working state of valve base electronic equipment of the high-voltage direct-current transmission valve control system to be tested can be equivalently simulated through high-voltage direct-current transmission thyristor-level equivalent simulation equipment, a plurality of thyristor trigger monitoring units of the high-voltage direct-current transmission valve control system to be tested are connected to a 12-pulse direct-current back-to-back physical dynamic model device, the valve base electronic equipment and all the thyristor trigger monitoring units can be tested simultaneously, namely, a full closed-loop test can be carried out on the high-voltage direct-current transmission valve control system, the comprehensive test on the functions and the reliability of the high-voltage direct-current transmission valve control system to be tested under the full-engineering configuration of software and hardware can be realized, and the problem that the transient steady-state characteristic and the signal interface of a converter valve cannot be accurately simulated by an existing test platform based on a digital simulation system is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced 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 that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a high-voltage direct-current transmission valve control system.
Fig. 2 is a schematic diagram of a test platform principle of a conventional high-voltage direct-current transmission valve control system.
Fig. 3 is a schematic structural diagram of a full closed loop test platform of a high-voltage direct-current transmission valve control system according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a 12-pulse DC back-to-back physical dynamic model apparatus;
FIG. 5 is a schematic structural diagram of a physical model of a single 12-pulse converter valve;
FIG. 6 is a schematic structural diagram of an equivalent simulation apparatus at the thyristor level of the HVDC transmission;
FIG. 7 is a voltage waveform across a rectifier single valve;
FIG. 8 is a rectifier single valve current waveform;
FIG. 9 is a voltage waveform across a single valve of an inverter;
FIG. 10 is an inverter single-valve current waveform;
fig. 11 shows the principle of the in-loop test of the hardware of the thyristor trigger monitoring unit.
Fig. 12 is a schematic flow chart of a full closed-loop test method for a high-voltage dc transmission valve control system according to an embodiment of the present invention;
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 some, not all, embodiments of the present invention. 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.
As shown in fig. 3, a full closed loop test platform of a high voltage direct current transmission valve control system according to an embodiment of the present application includes: the system comprises a control protection system, high-voltage direct-current transmission thyristor-level equivalent simulation equipment and 12-pulse direct-current back-to-back physical dynamic model devices, wherein the 12-pulse direct-current back-to-back physical dynamic model devices are used for connecting a plurality of thyristor trigger monitoring units of a high-voltage direct-current transmission valve control system to be tested and are connected with each other to form a closed loop;
the control protection system can be a processor, a server or a chip, and the high-voltage direct-current transmission thyristor-level equivalent simulation equipment can adopt high-voltage direct-current transmission thyristor-level equivalent simulation equipment with the subject name of '201510724793.6'.
The high-voltage direct-current transmission thyristor-level equivalent simulation equipment is used for: equivalently simulating the working state of valve base electronic equipment of the high-voltage direct-current transmission valve control system to be tested to obtain operation parameter data of the valve base electronic equipment, generating a control signal according to the operation parameter data of the valve base electronic equipment, and outputting the control signal to the 12-pulse direct-current back-to-back physical dynamic model device;
the 12 pulsating direct current back-to-back physical dynamic model device is used for: controlling all thyristor trigger monitoring units to operate according to the control signal to obtain operating parameter data of all thyristor trigger monitoring units;
the control protection system is used for: and obtaining a test result of the high-voltage direct-current transmission valve control system to be tested according to the operation parameter data of the valve base electronic equipment and the operation parameter data of all thyristor trigger monitoring units. Specifically, the method comprises the following steps:
and the control protection system acquires and compares the operation parameter data of the valve base electronic equipment and the operation parameter data of all thyristor trigger monitoring units with the prestored correct operation parameter data of the valve base electronic equipment and the operation parameter data of all thyristor trigger monitoring units, if the operation parameter data of the valve base electronic equipment and the operation parameter data of all thyristor trigger monitoring units are inconsistent, the test result indicates that the high-voltage direct-current transmission valve control system to be tested has a problem, and the position where the problem occurs can be marked in detail, such as the specific position of the valve base electronic equipment or the specific position of the thyristor trigger monitoring unit.
Preferably, in the above technical solution, the control protection system is further configured to: sending a first abnormal operation instruction to the high-voltage direct-current transmission thyristor-level equivalent simulation equipment;
the high-voltage direct-current transmission thyristor-level equivalent simulation equipment is further used for: generating a first abnormal operation control signal according to the first abnormal operation instruction, controlling the valve base electronic equipment to operate according to the first abnormal operation control signal, obtaining abnormal operation parameter data of the valve base electronic equipment, and sending the abnormal operation parameter data to the control protection system;
the control protection system is further configured to: and obtaining an abnormal test result of the valve base electronic equipment according to the abnormal operation parameter data of the valve base electronic equipment.
Specifically, the abnormal operation control signals corresponding to the first abnormal operation instructions are detected through some first abnormal operation instructions so that the valve base electronic equipment can normally find or process the abnormal operation control signals, and the abnormal operation control signals are compared with prestored correct abnormal operation parameter data (the parameter data are numerical data for recording abnormality) of the valve base electronic equipment, if the abnormal operation parameter data are inconsistent, the abnormal test result of the valve base electronic equipment is as follows: the valve base electronic equipment cannot normally detect the abnormal condition, and if the abnormal condition is consistent with the abnormal condition, the abnormal test result of the valve base electronic equipment is shown as follows: the valve-based electronics can normally detect the abnormal condition.
The first abnormal operation instruction can be set according to actual conditions. The command may be a command for controlling the conduction or protection of the thyristor, or may be a control command for a communication parameter.
Preferably, in the above technical solution, the control protection system is further configured to: sending a second abnormal operation instruction to the high-voltage direct-current transmission thyristor-level equivalent simulation equipment;
the high-voltage direct-current transmission thyristor-level equivalent simulation equipment is further used for: generating a second abnormal operation control signal according to the second abnormal operation instruction, and sending the second abnormal operation control signal to a 12-pulse direct-current back-to-back physical dynamic model device; the second abnormal operation instruction can also adopt a control instruction related to the conduction of the thyristor.
The 12 pulsating direct current back-to-back physical dynamic model device is further used for: controlling all thyristor trigger monitoring units to operate according to the second abnormal operation control signal to obtain abnormal operation parameter data of all thyristor trigger monitoring units, and sending the abnormal operation parameter data to the control protection system;
the control protection system is further configured to: and acquiring abnormal test results of all thyristor trigger monitoring units according to the abnormal operation parameter data of all thyristor trigger monitoring units.
Specifically, the abnormal operation control signals corresponding to the second abnormal operation instructions can be normally found or processed by detecting the second abnormal operation instructions through the second abnormal operation instructions, and are compared with the prestored correct abnormal operation parameter data of all thyristor trigger monitoring units, if the abnormal operation parameter data are inconsistent, the abnormal test results of all thyristor trigger monitoring units are as follows: all thyristor trigger monitoring units can not normally detect abnormal conditions, if the abnormal conditions are consistent, the abnormal test results of all thyristor trigger monitoring units are as follows: all thyristor trigger monitoring units can normally detect abnormal conditions.
Wherein, the second abnormal operation instruction can be set according to actual conditions.
Preferably, in the above technical solution, the system further includes a data acquisition and monitoring control System (SCADA), and the control and protection system performs data interaction with the high-voltage dc transmission thyristor-level equivalent simulation device and the 12-pulse dc back-to-back physical dynamic model device through the data acquisition and monitoring control system, specifically:
1) the control protection system sends an instruction through the data acquisition and monitoring control system so as to equivalently simulate the working state of the valve base electronic equipment of the high-voltage direct-current transmission valve control system to be tested; the operating state generally includes a normal state or an abnormal state, a fault state, and the like.
2) The control protection system acquires the operation parameter data of the valve-based electronic equipment and the operation parameter data of all thyristor trigger monitoring units through the data acquisition and monitoring control system, and the parameter data can be triggered by adopting a command of thyristor-level overvoltage protection action;
3) the control protection system sends a first abnormal operation instruction to the high-voltage direct-current transmission thyristor-level equivalent simulation equipment through a data acquisition and monitoring control system;
4) the control protection system collects abnormal operation parameter data of the valve base electronic equipment, such as related numerical data of abnormal operation, through the data collection and monitoring control system, and sends the abnormal operation parameter data to the control protection system;
5) the control protection system sends a second abnormal operation instruction to the high-voltage direct-current transmission thyristor-level equivalent simulation equipment through a data acquisition and monitoring control system;
6) and the control protection system triggers abnormal operation parameter data of the monitoring unit by the data acquisition and monitoring control system and all thyristors and sends the abnormal operation parameter data to the control protection system.
The control protection system obtains specific structure data of valve base electronic equipment of the high-voltage direct-current transmission valve control system to be tested through a field bus standard PROFIBUS of an automation technology, and sends the specific structure data to high-voltage direct-current transmission thyristor-level equivalent simulation equipment through a data acquisition and monitoring control system SCADA (supervisory control and data acquisition), so that the high-voltage direct-current transmission thyristor-level equivalent simulation equipment can equivalently simulate the working state of the valve base electronic equipment of the high-voltage direct-current transmission valve control system to be tested.
The control protection system obtains specific structure data of valve base electronic equipment of the high-voltage direct-current transmission valve control system to be tested through multiple paths of control optical signals.
The telemetry measurements in fig. 3 are: the operation parameter data of all thyristor trigger monitoring units and the abnormal operation parameter data of all thyristor trigger monitoring units, and the remote control quantity can be as follows: the control protection system can also directly send instructions to the 12-pulse direct-current back-to-back physical dynamic model device to obtain the operation parameter data of all thyristor trigger monitoring units and the abnormal operation parameter data of all thyristor trigger monitoring units.
Preferably, in the above technical solution, the control protection system is configured to: and adding the abnormal test results of the valve base electronic equipment and the abnormal test results of all thyristor trigger monitoring units into the test results of the high-voltage direct-current transmission valve control system to be tested.
As shown in fig. 3, the fully closed loop test platform of the high-voltage direct current transmission valve control system of the present application includes a 12-pulse direct current back-to-back physical dynamic model device, a single-valve thyristor-level equivalent device, i.e., a high-voltage direct current transmission thyristor-level equivalent simulation device, and a control protection system. The control protection system comprises a direct current control protection system and a background monitoring system SCADA (supervisory control and data acquisition), namely a data acquisition and monitoring control system SCADA, the tested products are VBE (voltage-variable bit array) and a plurality of TTMs (time-to-live) of a high-voltage direct current transmission valve control system, the test equipment and the tested products are organically combined, the basic operation condition of the actual direct current transmission project is simulated, the tested products are enabled to operate under the operation condition equivalent to the actual project, and various functions and performances of the tested products are comprehensively verified.
The control protection system is used as a control and monitoring system of the test platform, realizes the functions of starting and stopping tests, simulating various working conditions and the like of the test platform, and is the brain of the whole test platform. The control protection system can monitor and control the switch equipment in the 12 pulsating direct current back-to-back physical dynamic model device through remote measurement and remote control quantity, and simultaneously control and monitor the direct current converter valve in the 12 pulsating direct current back-to-back physical dynamic model device through VBE and TTM.
The 12 pulsating direct current back-to-back physical dynamic model device simulates the operation conditions of actual direct current transmission engineering, including steady-state and transient conditions. The VBE and TTM are also actual controlled objects of tested products, so that the controlled objects can run under the working condition the same as that of the actual engineering, and the purpose of verifying all functions and performances of the controlled objects is achieved.
The VBE and TTM of the tested products are used as interface equipment between the control protection system and the 12 pulsating direct current back-to-back physical dynamic model device, and assist the control protection system to realize direct current converter valve equipment in the 12 pulsating direct current back-to-back physical dynamic model device.
The single valve thyristor equivalent equipment, namely the high-voltage direct-current transmission thyristor level equivalent simulation equipment, serves as an interface device between a VBE (voltage-to-average potential) of a tested product and a TTM (time to live) of the tested product, interface signals between the VBE and the TTM are configured according to the number of the interface signals of actual engineering, so that the two tested products are equivalent to actual operation conditions, and the test integrity is improved.
The 12-pulse direct-current back-to-back physical dynamic model device is composed of two 12-pulse converter valve physical models and adopts a ring topology, as shown in fig. 4. The single converter valve in the 12-pulse converter valve physical model is composed of 60-80 stages of thyristors in series connection during actual engineering use, and is simulated by the single thyristor stage, as shown in fig. 5, so that the cost and safety requirements are met on the premise of ensuring equivalent electrical characteristics. And each thyristor-level electric loop is the same as the actual engineering, comprises a thyristor, a direct-current voltage-sharing resistor, a damping capacitor and the like, has the electrical and control characteristics equivalent to the actual engineering, can be compatible with the thyristor trigger monitoring unit of a tested product, and realizes the hardware-in-loop test of the thyristor trigger monitoring unit. Specifically, the method comprises the following steps:
as shown in fig. 4, in addition to two 12-pulse converter valve physical models, in order to equivalent complete operation characteristics of the direct current transmission project, the converter transformer, the voltage regulator, the disconnecting switch, the circuit breaker and related measuring devices are further included. And in order to realize flexible configuration of test items, isolating switches (Q31 and Q32) and resistive loads are configured between the two converter valve models.
The 12-pulse direct-current back-to-back physical dynamic model device comprises two operation and test modes:
1) double 12-pulse converter valve HVDC operation mode: q31 is switched on, Q32 is switched off, Q11 is switched on, Q12 is switched on, Q21 is switched on, and Q22 is switched on;
2) the single 12-pulse converter valve rectification operation mode is as follows: q32 closing, Q31 opening, Q11 closing (or opening), Q12 closing (or opening), Q21 opening (or closing), and Q22 opening (or closing).
The 12 pulsating direct current back-to-back physical dynamic model device is equivalent to the electrical characteristics of a high-voltage direct current transmission system of an actual project, simulates the actual operation conditions of a thyristor trigger monitoring unit TTM and a valve base electronic equipment VBE of a tested product, and realizes the hardware-in-loop test under the full project configuration of the thyristor trigger monitoring unit TTM and the valve base electronic equipment VBE.
The high-voltage direct-current transmission thyristor-level equivalent simulation equipment is used for simulating the operation state of any one level, multiple levels and even all thyristor levels in a single valve. The structure is specifically shown in fig. 6, after the high-voltage direct-current transmission thyristor-level equivalent simulation device receives a communication signal of a single thyristor level, the signal is copied in the device content, and the same quantity as an actual engineering signal is realized. The system mainly comprises an optical signal receiver, an optical signal transmitter, an optical signal replication and distribution module and an optical signal merging module. For the specific working process, refer to the equivalent simulation equipment of the high-voltage dc transmission thyristor level in the application number "201510724793.6" and the subject name "an equivalent simulation equipment of the high-voltage dc transmission thyristor level", which is not described herein again.
The direct-current control protection system mainly comprises a main control case, an analog quantity acquisition case and a switching value transceiver case, is used for simulating the direct-current control protection system of the actual engineering, is connected with the valve base electronic equipment of the tested object, realizes the control and monitoring function simulation of the valve base electronic equipment, enables the valve base electronic equipment to be tested under the full engineering configuration, and improves the test equivalence. The main control case realizes the control protection strategy, the communication with the valve-based electronic device and other functions, the analog quantity acquisition case realizes the running electrical quantity acquisition function of the 12-pulse physical model, the switching quantity transceiver case realizes the control and monitoring functions of the circuit breaker and the disconnecting switch of the physical model, and the working process of the direct current control protection system is known by those skilled in the art and is not described herein.
Wherein, backstage monitored control system, visual degree height, convenient operation's integral converter valve operation monitored control system, the data that specifically are used for the control are: the method comprises the steps of triggering and monitoring the running state of a unit by a tested object thyristor, the running state of a tested object valve base electronic device, a 12-pulse direct-current back-to-back physical dynamic model device, simulating converter valve faults, controlling starting and stopping of a test, controlling emergency shutdown of a test platform and the like.
The starting process of the full closed-loop test platform of the high-voltage direct-current transmission valve control system is as follows:
the test platform is started by simulating the starting mode of back-to-back direct current transmission engineering, firstly, the voltage regulators (as shown in figure 2) on the rectification and inversion sides are adjusted to the lowest gear (the lowest voltage gear of the voltage on the transformer valve side), then the switch Q32 is separated, the switch Q31 is closed, then the switches Q11 and Q12 on the rectifying side and the switches Q21 and Q22 on the inverting side are closed, whether the output voltage of the voltage regulator is the lowest is observed, then the switches Q13, Q14, Q23 and Q24 are closed to charge the converter transformers on the two sides, and observing whether the output voltage of the converter transformer meets the transformation ratio after the charging is finished, then adjusting the voltage regulators at the two sides to the rated voltage (for example, 400VDC) of the system, locking all converter valves at the moment, enabling all 24 TTM boards in the system, establishing communication between all TTMs and the VBE when the TTMs are enabled completely, observing whether the RFO signal of the VBE is normal through a background at the moment, and indicating that the system has an unlocking condition if the TTMs are normal.
The method comprises the following steps of issuing a rectification side unlocking instruction from an SCADA background remote control, observing whether the rated voltage of a direct current bus is stably established or not by an operator at the moment, issuing an inversion side unlocking instruction after confirming that the rated voltage is normal, and confirming that all thyristor levels operate without faults by profibus messages uploaded from a VBE after the rectification side and the inversion side are normally unlocked, wherein the test platform has test conditions supporting various test items of the VBE at the moment, can be used for carrying out tests, and the test items are explained by 2 test examples below, specifically:
1) thyristor level overvoltage protection test of VBE: the method specifically includes the steps that a background SCADA remote control single valve thyristor level equivalent device is used for designating a certain valve, such as a valve 3, wherein the communication code which is reported to a VBE by a xth channel (or any multiple channels and the like) thyristor level in a test process is a thyristor level overvoltage protection action, an operator observes a profibus message output by the VBE in the test process to judge whether the VBE function is normal, and when the VBE monitors that the number of thyristor level which reports the thyristor level overvoltage protection action exceeds a VBE system redundancy setting, the VBE reports that the thyristor level overvoltage protection action of the valve x is in super-redundancy.
2) VBE thyristor level fault monitoring test: the principle of the test is designed according to the characteristics of the LCC type converter valve, a thyristor-level trigger monitoring plate (TTM) needs to be taken from the thyristor level to work, when a thyristor on the thyristor level breaks down, the thyristor level is equivalent to a short circuit, the TTM cannot take energy, the optical fiber communication transmitted to VBE by the TTM cannot be light, the VBE cannot monitor an optical signal from the TTM, and the VBE is considered to be damaged after a plurality of power frequency cycles, so that corresponding related actions are carried out.
According to the principle, the test specifically includes that a background SCADA is used to remotely control a single-valve thyristor level equivalent device, and a certain valve, such as the valve 3 (a valve Y2 in fig. 2 or fig. 4) is specified, wherein the xth-channel (or any multiple channels and the like) thyristor level interrupts a communication optical signal reported back to the VBE in the test process, so as to induce the VBE to consider that the thyristor level is damaged, an operator can judge whether the VBE functions are normal by observing a profibus message output by the VBE in the test process, and when the VBE monitors that the number of thyristor levels reporting "thyristor level fault" exceeds VBE system redundancy setting, the VBE reports "valve x thyristor level fault super redundancy".
In another embodiment, the method comprises the following steps: 12 pulsating direct current back-to-back physical dynamic model devices, high-voltage direct current transmission thyristor level equivalent simulation equipment, a direct current control protection system and a background monitoring system; specifically, the method comprises the following steps:
1)12 pulsating direct current back-to-back physical dynamic model device:
a12-pulse direct-current back-to-back physical dynamic model device is designed, the electrical characteristics of a high-voltage direct-current power transmission system of an equivalent actual project of a low-voltage physical model are innovatively adopted, and the 12-pulse direct-current back-to-back physical model is composed of two 12-pulse current converters, 2 transformers, 2 voltage regulators, a plurality of circuit breakers and isolating switches, wherein a single thyristor simulates one converter valve. The converter valve is simulated by a single thyristor level and is compatible with an actual thyristor trigger monitoring unit, so that a hardware-in-loop test of the thyristor trigger monitoring unit is realized for the first time. The model adopts a ring-shaped electrical topology, so that the rectification side and the inversion side of the back-to-back direct current transmission system adopt the same alternating current bus, active power required by the test platform forms a circulating current, active dependence on a laboratory power supply is reduced, and the operation safety of the test platform is improved.
2) High-voltage direct-current transmission thyristor-level equivalent simulation equipment:
the single-valve thyristor level equivalent equipment is developed, the running state of any one level, multiple levels and even all thyristor levels in a single valve can be flexibly simulated according to the running state of a single-stage thyristor, the defects that a pure digital simulation system cannot simulate the real physical transient and steady state characteristics and incomplete signals of the thyristor level of the converter valve are overcome, and the VBE interface and the working condition can be completely equivalent to the actual engineering.
3) A background monitoring system:
the integrated converter valve operation monitoring system with high visualization degree and convenient operation is developed, can visually reflect the operation working conditions of each thyristor level in the converter valve, monitors the operation state and the test result of the tested valve control system in real time, and has the characteristics of complete function, strong performance, high data response speed, strong information processing capability and the like.
4) The full-working-condition dynamic mold test method comprises the following steps:
the valve control system kilo-level thyristor real-time monitoring and the comprehensive assessment of the control protection strategy of the converter valve under the full engineering configuration can be realized under the laboratory environment by adopting the real direct-current control protection and the background monitoring as the upper control system, the full equivalence of the functions and the interfaces among the valve control system, the direct-current control protection system, the background monitoring system and the converter valve is realized, the various functions and the reliability of the valve control system are fully verified, and the optimal test evaluation conclusion is reached.
In the embodiment of the invention, a brand-new 12-pulse direct-current back-to-back physical dynamic model device is designed, and as shown in fig. 4, the device can be matched with a VBE (visual basic), a TTM (time to live) and a control and protection system to complete a related valve control test. The back-to-back direct current system can operate according to a complete direct current system or a single rectifier with load based on transient steady-state characteristics of a direct current transmission system required by a low-voltage physical model equivalent valve control system full closed-loop test, system parameters are shown in the following table 1, and voltage and current waveforms of converter valves are shown in fig. 7, 8, 9 and 10.
Table 1:
| serial number | Parameter name | (symbol) | Value of | Unit of | |
| 1 | Direct current voltage at rectifying side | Udr | 420 | V | |
| 2 | DC voltage at inverter side | Udi | 380 | V | |
| 3 | Direct Current (DC) | Id | 40 | |
|
| 4 | Rectifying side trigger angle | α | 15 | Power frequency electric angle | |
| 5 | Turn-off angle of inverter side | γ | 17 | Power frequency electric angle | |
| 6 | Leakage reactance of converter | X | 0.18 | pu | |
| 7 | Number of 6 pulse series connections | N | 2 | An | |
| 8 | Line | R | 1 | Ω | |
| 9 | No-load line voltage of rectifier side converter | Ur | 166 | |
|
| 10 | Inversion side current conversion transformer no-load line voltage | Ui | 152 | V | |
| 11 | Rectifying side commutation varactor | Sr | 9400 | VA | |
| 12 | Inverting side commutation variable capacitance | Si | 8619 | VA |
This 12 pulsation direct current is physical dynamic model device back-to-back comprises a plurality of physics real objects, includes: the system consists of 2 12 pulse converter valves with single valve formed by single thyristor, 4 on-load tap changing transformers, 2 voltage regulators, a plurality of circuit breakers and isolating switches, a bus and a plurality of voltage and current measuring devices. The physical model adopts a unique annular electrical topology, so that the rectification side and the inversion side of the back-to-back direct current transmission system adopt the same electrical bus, and the bus is connected with a power supply of a laboratory. The advantage of this kind of electric topology is that the real power forms the conversion of current in the annular electric return circuit, reduces the real dependence to the laboratory power supply, has reduced the impact to the laboratory power supply.
The single converter valve in the 12-pulse direct-current back-to-back physical dynamic model device consists of a thyristor, and a thyristor damping voltage-sharing loop with the same parameters as those of a project site is also configured, so that the functions of the interface of the thyristor trigger monitoring unit for the project are completely compatible, and the hardware-in-loop test of the thyristor trigger monitoring unit of the tested product can be realized, as shown in fig. 11.
In the embodiment of the invention, high-voltage direct-current transmission thyristor level equivalent simulation equipment is developed, the running state of any one level, multiple levels and even all thyristor levels in a single valve can be flexibly simulated according to the running state of a single-level thyristor, the defects that a pure digital simulation system cannot simulate the real physical transient and steady-state characteristics and signals of the thyristor level of a converter valve are incomplete are overcome, and the VBE interface and the working condition of a tested product are completely equivalent to the actual engineering.
In the embodiment of the invention, a set of converter valve operation monitoring data processing platform is developed, the operation conditions of each thyristor level in the converter valve can be visually embodied, the operation state and the test result of the tested valve control system can be monitored in real time, and the requirements of operators on calling, monitoring and operating each thyristor level of the converter valve and the operation state of the tested valve control system at any time can be met.
The embodiment of the invention provides a full-working-condition dynamic simulation test method for a valve control system, which adopts real direct-current control protection and background monitoring as an upper-layer control system, can realize the real-time monitoring of a thousand-level thyristor and the comprehensive examination of a control protection strategy of a converter valve of the valve control system under full engineering configuration in a laboratory environment, realizes the full equivalence of the functions and interfaces between the valve control system and the direct-current control protection system, between the background monitoring system and between the valve control system and the converter valve, fully verifies the various functions and the reliability of the high-voltage direct-current transmission valve control system, and reaches the optimal test evaluation conclusion.
The high-voltage direct-current transmission thyristor level equivalent simulation equipment comprises a 12-pulse direct-current back-to-back physical dynamic model device, high-voltage direct-current transmission thyristor level equivalent simulation equipment, a direct-current control protection system, a background monitoring system, a tested valve control system (VBE and TTM) and the like. By the test platform, comprehensive testing of functions and reliability of the valve control system under the full-engineering configuration of software and hardware is realized for the first time, the defect that the hardware-in-the-loop test under the full-engineering configuration of the valve control system cannot be realized due to the fact that the traditional test platform based on the digital simulation system cannot simulate massive signal interfaces and operating conditions of the valve control system is overcome, and the reliability of the high-voltage direct-current converter valve control system and even a direct-current transmission project is further improved. Aiming at the characteristics of complex structure, test method, interface configuration, huge communication data volume and the like of a valve control system test platform, the invention provides a function and reliability test method of the valve control system of the high-voltage direct-current converter valve, completes the design of the test platform, and breaks through the technical difficulties of research on test interfaces and functional equivalence, development of key equipment and the like.
As shown in fig. 12, a full closed-loop test method for a high-voltage direct-current transmission valve control system according to an embodiment of the present invention includes:
s1, equivalently simulating the working state of valve base electronic equipment of the high-voltage direct-current transmission valve control system to be tested by high-voltage direct-current transmission thyristor-level equivalent simulation equipment to obtain the operation parameter data of the valve base electronic equipment, generating a control signal according to the operation parameter data of the valve base electronic equipment, and outputting the control signal to the 12 pulsating direct-current back-to-back physical dynamic model device;
s2, connecting 12 pulsating direct current back-to-back physical dynamic model devices of a plurality of thyristor trigger monitoring units of the high-voltage direct current transmission valve control system to be tested, and controlling all thyristor trigger monitoring units to operate according to the control signals to obtain operation parameter data of all thyristor trigger monitoring units;
and S3, the control protection system obtains and obtains the test result of the high-voltage direct-current transmission valve control system to be tested according to the operation parameter data of the valve base electronic equipment and the operation parameter data of all thyristor trigger monitoring units.
Preferably, in the above technical solution, the method further comprises:
s10, the control protection system sends a first abnormal operation instruction to the high-voltage direct-current transmission thyristor-level equivalent simulation equipment;
s11, generating a first abnormal operation control signal by the high-voltage direct-current transmission thyristor-level equivalent simulation equipment according to the first abnormal operation instruction, controlling the valve base electronic equipment to operate according to the first abnormal operation control signal, obtaining abnormal operation parameter data of the valve base electronic equipment, and sending the abnormal operation parameter data to the control protection system;
and S12, the control protection system further obtains and obtains an abnormal test result of the valve base electronic equipment according to the abnormal operation parameter data of the valve base electronic equipment.
Preferably, in the above technical solution, the method further comprises:
s20, the control protection system sends a second abnormal operation instruction to the high-voltage direct-current transmission thyristor-level equivalent simulation equipment;
s21, generating a second abnormal operation control signal by the high-voltage direct-current transmission thyristor-level equivalent simulation equipment according to the second abnormal operation instruction, and sending the second abnormal operation control signal to a 12-pulse direct-current back-to-back physical dynamic model device;
s22, the 12 pulsating direct current back-to-back physical dynamic model device controls all thyristor trigger monitoring units to operate according to the second abnormal operation control signal, abnormal operation parameter data of all thyristor trigger monitoring units are obtained, and the abnormal operation parameter data are sent to the control protection system;
and S23, the control protection system acquires and obtains the abnormal test results of all thyristor trigger monitoring units according to the abnormal operation parameter data of all thyristor trigger monitoring units.
Preferably, in the above technical solution, the process of data interaction between the control protection system and the high-voltage dc transmission thyristor-level equivalent simulation device and the 12-pulse dc back-to-back physical dynamic model device includes:
and the control protection system performs data interaction with the high-voltage direct-current transmission thyristor-level equivalent simulation equipment and the 12 pulsating direct-current back-to-back physical dynamic model device through the data acquisition and monitoring control system.
Preferably, in the above technical solution, the method further comprises:
and S4, the control protection system adds the abnormal test results of the valve base electronic equipment and the abnormal test results of all thyristor trigger monitoring units to the test results of the high-voltage direct-current transmission valve control system to be tested.
In the foregoing embodiments, although the steps are numbered as S1, S2, etc., but only the specific embodiments given herein are provided, and those skilled in the art may adjust the execution sequence of S1, S2, etc. according to the actual situation, and this is also within the protection scope of the present invention, and it is understood that some embodiments may include some or all of the above embodiments.
In the present invention, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a full closed loop test platform of high voltage direct current transmission valve accuse system which characterized in that includes: the system comprises a control protection system, high-voltage direct-current transmission thyristor-level equivalent simulation equipment and 12-pulse direct-current back-to-back physical dynamic model devices, wherein the 12-pulse direct-current back-to-back physical dynamic model devices are used for connecting a plurality of thyristor trigger monitoring units of a high-voltage direct-current transmission valve control system to be tested and are connected with each other to form a closed loop;
the high-voltage direct-current transmission thyristor-level equivalent simulation equipment is used for: equivalently simulating the working state of valve base electronic equipment of the high-voltage direct-current transmission valve control system to be tested to obtain the operating parameter data of the valve base electronic equipment, generating a control signal according to the operating parameter data of the valve base electronic equipment, and outputting the control signal to the 12-pulse direct-current back-to-back physical dynamic model device;
the 12 pulsating direct current back-to-back physical dynamic model device is used for: controlling all thyristor trigger monitoring units to operate according to the control signal to obtain operating parameter data of all thyristor trigger monitoring units;
the control protection system is used for: and obtaining a test result of the high-voltage direct-current transmission valve control system to be tested according to the operation parameter data of the valve base electronic equipment and the operation parameter data of all thyristor trigger monitoring units.
2. The fully closed loop test platform of the HVDC transmission valve control system according to claim 1, wherein the control protection system is further configured to: sending a first abnormal operation instruction to the high-voltage direct-current transmission thyristor-level equivalent simulation equipment;
the high-voltage direct-current transmission thyristor-level equivalent simulation equipment is further used for: generating a first abnormal operation control signal according to the first abnormal operation instruction, controlling the valve base electronic equipment to operate according to the first abnormal operation control signal to obtain abnormal operation parameter data of the valve base electronic equipment, and sending the abnormal operation parameter data to the control protection system;
the control protection system is further configured to: and obtaining an abnormal test result of the valve base electronic equipment according to the abnormal operation parameter data of the valve base electronic equipment.
3. The fully closed loop test platform of the HVDC transmission valve control system according to claim 2, wherein the control protection system is further configured to: sending a second abnormal operation instruction to the high-voltage direct-current transmission thyristor-level equivalent simulation equipment;
the high-voltage direct-current transmission thyristor-level equivalent simulation equipment is further used for: generating a second abnormal operation control signal according to the second abnormal operation instruction, and sending the second abnormal operation control signal to a 12-pulse direct-current back-to-back physical dynamic model device;
the 12 pulsating direct current back-to-back physical dynamic model device is further used for: controlling all thyristor trigger monitoring units to operate according to the second abnormal operation control signal to obtain abnormal operation parameter data of all thyristor trigger monitoring units, and sending the abnormal operation parameter data to the control protection system;
the control protection system is further configured to: and acquiring abnormal test results of all thyristor trigger monitoring units according to the abnormal operation parameter data of all thyristor trigger monitoring units.
4. The full closed loop test platform of the HVDC valve control system according to any one of claims 1 to 3, further comprising a data acquisition and monitoring control system, wherein the control protection system performs data interaction with the HVDC thyristor-level equivalent simulation device and the 12-pulse DC back-to-back physical dynamic model device through the data acquisition and monitoring control system.
5. The full closed loop test platform of a HVDC transmission valve control system of claim 3, wherein the control protection system is configured to: and adding the abnormal test results of the valve base electronic equipment and the abnormal test results of all thyristor trigger monitoring units into the test results of the high-voltage direct-current transmission valve control system to be tested.
6. A full closed loop test method of a high-voltage direct current transmission valve control system is characterized by comprising the following steps: the following devices which are connected with each other to form a closed loop;
the high-voltage direct-current transmission thyristor-level equivalent simulation equipment equivalently simulates the working state of valve base electronic equipment of a high-voltage direct-current transmission valve control system to be tested to obtain operation parameter data of the valve base electronic equipment, generates a control signal according to the operation parameter data of the valve base electronic equipment and outputs the control signal to the 12 pulsating direct-current back-to-back physical dynamic model device;
the 12-pulse direct-current back-to-back physical dynamic model device is used for connecting the thyristor trigger monitoring units of the high-voltage direct-current transmission valve control system to be tested, and controls all the thyristor trigger monitoring units to operate according to the control signal to obtain the operation parameter data of all the thyristor trigger monitoring units;
and the control protection system obtains and obtains a test result of the high-voltage direct-current transmission valve control system to be tested according to the operation parameter data of the valve base electronic equipment and the operation parameter data of all thyristor trigger monitoring units.
7. The full closed-loop test method for the HVDC valve control system according to claim 6, further comprising:
the control protection system sends a first abnormal operation instruction to the high-voltage direct-current transmission thyristor-level equivalent simulation equipment;
the high-voltage direct-current transmission thyristor-level equivalent simulation equipment generates a first abnormal operation control signal according to the first abnormal operation instruction, controls the valve base electronic equipment to operate according to the first abnormal operation control signal, obtains abnormal operation parameter data of the valve base electronic equipment, and sends the abnormal operation parameter data to the control protection system;
and the control protection system also acquires and obtains an abnormal test result of the valve base electronic equipment according to the abnormal operation parameter data of the valve base electronic equipment.
8. The full closed-loop test method for the HVDC valve control system according to claim 7, further comprising:
the control protection system sends a second abnormal operation instruction to the high-voltage direct-current transmission thyristor-level equivalent simulation equipment;
the high-voltage direct-current transmission thyristor-level equivalent simulation equipment generates a second abnormal operation control signal according to the second abnormal operation instruction, and sends the second abnormal operation control signal to a 12-pulse direct-current back-to-back physical dynamic model device;
the 12 pulsating direct current back-to-back physical dynamic model device controls all thyristor trigger monitoring units to operate according to the second abnormal operation control signal, obtains abnormal operation parameter data of all thyristor trigger monitoring units, and sends the abnormal operation parameter data to the control protection system;
and the control protection system acquires and obtains abnormal test results of all thyristor trigger monitoring units according to the abnormal operation parameter data of all thyristor trigger monitoring units.
9. The full closed-loop test method for the HVDC valve control system according to any one of claims 6 to 8, wherein the process of the control protection system performing data interaction with the HVDC thyristor-level equivalent simulation device and the 12-pulse DC back-to-back physical dynamic model device includes:
and the control protection system performs data interaction with the high-voltage direct-current transmission thyristor-level equivalent simulation equipment and the 12 pulsating direct-current back-to-back physical dynamic model device through the data acquisition and monitoring control system.
10. The full closed-loop test method for the valve control system of the high-voltage direct current transmission according to claim 8, further comprising:
and the control protection system adds the abnormal test results of the valve base electronic equipment and the abnormal test results of all thyristor trigger monitoring units into the test results of the high-voltage direct-current transmission valve control system to be tested.
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| CN202210129427.6A CN114647227A (en) | 2022-02-11 | 2022-02-11 | Full closed loop test platform and method for high-voltage direct-current transmission valve control system |
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