CN106707796B - Hybrid simulation physical simulation device for flexible direct current converter - Google Patents
Hybrid simulation physical simulation device for flexible direct current converter Download PDFInfo
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- CN106707796B CN106707796B CN201710113635.6A CN201710113635A CN106707796B CN 106707796 B CN106707796 B CN 106707796B CN 201710113635 A CN201710113635 A CN 201710113635A CN 106707796 B CN106707796 B CN 106707796B
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- 230000002457 bidirectional effect Effects 0.000 description 5
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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
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The invention relates to a hybrid simulation physical simulation device of a flexible direct current converter, and belongs to the technical field of electric automation equipment. The device comprises a flexible direct current converter valve simulation device, an alternating current bus power amplifier and a direct current bus power amplifier. The digital and analog signal ends of the alternating current bus power amplifier are respectively connected to an external power system real-time digital simulation platform and a tested flexible direct current converter control and protection device, and the digital and analog signal ends of the direct current bus power amplifier are respectively connected to the external power system real-time digital simulation platform and the tested flexible direct current converter control and protection device. The invention can realize the direct access of the flexible direct current converter control and protection device for real-time simulation test, and can also be combined with the real-time digital simulation platform of the RTDS and other power systems for hybrid simulation, thereby solving the problem of factory test of the flexible direct current converter control and protection device.
Description
Technical Field
The invention relates to a hybrid simulation physical simulation device of a flexible direct current converter, and belongs to the technical field of electric automation equipment.
Background
At present, simulation researches of control and protection of a flexible direct current converter and a power transmission system generally adopt theoretical analysis, off-line PSCAD simulation/MATLAB simulation and RT-LAB/RTDS real-time simulation platforms. Compared with digital simulation, the dynamic model physical simulation system has consistent physical characteristics and prototypes, the change process of the relative values of physical quantities such as current, voltage, power and the like in the model can be the same as that in the simulated prototyping system, and effects such as saturation, hysteresis, vortex and the like which are often ignored or approximated in theoretical analysis or off-line simulation can be reflected more completely in dynamic simulation, and the effects on the transition process are often considered in control and protection. Thus, the dynamic physical simulation can more truly reflect the operational characteristics of the actual system. On the other hand, the real-time digital simulation platform of the electric power system such as RTDS and the like can comprehensively simulate the operation and protection of an alternating current/direct current power grid, and has large-scale advantages which cannot be compared with physical simulation, so that the hybrid simulation system combining the real-time digital simulation platform of the electric power system such as RTDS and the flexible direct current physical simulation device has unique advantages, can comprehensively and accurately simulate various main equipment such as an alternating current field, a converter transformer, a converter valve, a direct current field, a direct current transmission line, a valve triggering interface, a voltage transformer, a current transformer, a direct current voltage/current measuring element, an isolation and grounding disconnecting link and the like of the flexible direct current HVDC power transmission system, and the direct current control protection system can be connected into the simulation system to operate in a mode basically consistent with actual engineering. The fault points can be arranged on an alternating current bus, a converter transformer, a converter valve, a direct current transmission line and the like of the simulation system, faults of the HVDC system can be conveniently researched, the response of the control protection system to the faults is researched and checked, the control protection algorithms of the PCP and the VBC of the flexible direct current control and protection system are thoroughly verified, the reliability of the control protection device is checked, and the reliability is used as a means for controlling the factory test of the protection system to correct and optimize the control parameters so that the system can be directly used for engineering debugging after the test is completed.
Disclosure of Invention
The invention aims to provide a hybrid simulation physical simulation device of a flexible direct current converter, which overcomes the defects of the prior art, enables a control and protection device of the flexible direct current converter to be directly connected to perform real-time simulation test, and can be combined with a real-time digital simulation platform of an RTDS and other power systems to perform hybrid simulation so as to solve the problem of factory test of the control and protection device of the flexible direct current converter.
The invention provides a flexible direct current converter hybrid simulation physical simulation device which comprises a flexible direct current converter valve simulation device, an alternating current bus power amplifier and a direct current bus power amplifier. The three-phase alternating current input end AI/BI/CI of the alternating current bus power amplifier is connected to an alternating current power grid, the three-phase alternating current output end AO/BO/CO of the alternating current bus power amplifier is connected to the three-phase alternating current input end A/B/C of the flexible direct current converter valve simulation device, the direct current output end DC1 < + >/DC 1 < - > of the flexible direct current converter valve simulation device is connected to the direct current output end DC2 < + >/DC 2 < + >, of the direct current bus power amplifier, and the three-phase alternating current input end U/V/W of the direct current bus power amplifier is connected to the alternating current power grid; the digital and analog signal ends IO1 and IO2 of the alternating current bus power amplifier are respectively connected to an external power system real-time digital simulation platform and a tested flexible direct current converter control and protection device, and the digital and analog signal ends IO3 and IO4 of the direct current bus power amplifier are respectively connected to the external power system real-time digital simulation platform and the tested flexible direct current converter control and protection device.
The invention provides a hybrid simulation physical simulation device of a flexible direct current converter, which has the advantages that: the device can realize the direct access of the flexible direct current converter control and protection device for real-time simulation test, and can also be combined with a real-time digital simulation platform of an RTDS and other power systems for hybrid simulation, thereby solving the problem of factory test of the flexible direct current converter control and protection device.
Drawings
Fig. 1 is a schematic diagram of the structure of the hybrid simulation physical simulation device of the flexible direct current converter.
Fig. 2 is a schematic circuit diagram of an ac bus power amplifier in the hybrid simulated physical simulation device of the flexible dc converter shown in fig. 1.
Fig. 3 is a schematic circuit diagram of a dc bus power amplifier and a flexible dc converter valve simulation device in the flexible dc converter hybrid simulation physical simulation device shown in fig. 1.
Fig. 4 is a schematic diagram of an H-bridge power module in the dc bus power amplifier shown in fig. 3.
Detailed Description
The invention provides a flexible direct current converter hybrid simulation physical simulation device, which comprises a flexible direct current converter valve simulation device, an alternating current bus power amplifier and a direct current bus power amplifier as shown in a dotted line frame in fig. 1. The three-phase alternating current input end AI/BI/CI of the alternating current bus power amplifier is connected to an alternating current power grid, the three-phase alternating current output end AO/BO/CO of the alternating current bus power amplifier is connected to the three-phase alternating current input end A/B/C of the flexible direct current converter valve simulation device, the direct current output end DC1 < + >/DC 1 < - > of the flexible direct current converter valve simulation device is connected to the direct current output end DC2 < + >/DC 2 < + >, of the direct current bus power amplifier, and the three-phase alternating current input end U/V/W of the direct current bus power amplifier is connected to the alternating current power grid; the digital and analog signal ends IO1 and IO2 of the alternating current bus power amplifier are respectively connected to an external power system real-time digital simulation platform and a tested flexible direct current converter control and protection device, and the digital and analog signal ends IO3 and IO4 of the direct current bus power amplifier are respectively connected to the external power system real-time digital simulation platform and the tested flexible direct current converter control and protection device.
The alternating current bus power amplifier used in the flexible direct current converter hybrid simulation physical simulation device provided by the invention can be an alternating current bus power amplifier based on the direct current back-to-back connection of an NPC (neutral point clamped) three-level voltage source inverter as shown in figure 2, and is produced by Beijing Sieve open-circuit conversion technology Co., ltd, the product model is SWBAD-X/X, and the direct current back-to-back connection of the existing two-level voltage source inverter or other bidirectional AC-DC-AC converter circuits or bidirectional AC-AC direct conversion converter circuits can be adopted.
In the flexible direct current converter hybrid simulation physical simulation device provided by the invention, the direct current bus power amplifier and the flexible direct current converter valve simulation device can be used, wherein the direct current bus power amplifier based on an MMC (modular multilevel converter) converter shown in fig. 3 can be adopted, and a converter module is an H-bridge power module shown in fig. 4. The direct current bus power amplifier and the direct current bus power amplifier are manufactured by Beijing Sieve clear current technology limited company, the product model is SWMMC-X/X, and other existing bidirectional DC-AC converter circuits can be adopted.
The invention provides a hybrid simulation physical simulation device of a flexible direct current converter, which has the following working principle: the measurement and control optical fiber connected with the valve of the tested flexible direct current converter control and protection device is directly connected to the corresponding optical fiber interface end IO5 of the flexible direct current converter valve simulation device, and is used for simulating measurement and control of the tested flexible direct current converter control and protection device on the actual engineering flexible direct current converter valve; the alternating current bus power amplifier capable of realizing bidirectional power transmission carries out analog or digital signal exchange with the real-time digital simulation platform of the power system through IO1, and controls the three-phase alternating current voltage of the three-phase alternating current output end AO/BO/CO of the alternating current bus power amplifier according to the alternating current bus voltage output signal output by the real-time digital simulation platform of the power system, which is equivalent to the fact that the three-phase alternating current input end A/B/C of the analog device of the flexible direct current converter valve is connected with the corresponding alternating current bus of the real-time digital simulation platform of the power system; the DC bus power amplifier capable of realizing bidirectional power transmission exchanges analog or digital signals with the real-time digital simulation platform of the power system through IO3, and controls the DC voltage or DC current of a DC output end DC1 < + >/DC 1 < - >, which is equivalent to the DC output end DC1 < + >/DC 1 < - >, which simulates the flexible DC converter valve simulation device, of the DC bus power amplifier according to the DC bus voltage or DC bus current output signal output by the real-time digital simulation platform of the power system, and the corresponding DC bus of the real-time digital simulation platform of the power system is connected; the alternating current bus power amplifier transmits signals such as alternating current bus voltage, current and switching state to the tested flexible direct current converter control and protection device through the digital and analog signal end IO2, and the direct current bus power amplifier transmits signals such as direct current bus voltage, current and switching state to the tested flexible direct current converter control and protection device through the digital and analog signal end IO4, so that closed loop control and protection test of the tested flexible direct current converter control and protection device on the flexible direct current converter valve simulation device is realized.
The flexible direct current converter valve simulation device can also be realized by adopting other types of voltage sources or current source converters, and any equivalent conversion circuit based on the circuit belongs to the protection scope of the invention.
Claims (1)
1. The utility model provides a flexible direct current converter mixes emulation physical simulation device which characterized in that includes: a flexible DC converter valve analog device, an AC bus power amplifier, a DC bus power amplifier; the three-phase alternating current input end AI/BI/CI of the alternating current bus power amplifier is connected to an alternating current power grid, the three-phase alternating current output end AO/BO/CO of the alternating current bus power amplifier is connected to the three-phase alternating current input end A/B/C of the flexible direct current converter valve simulation device, the direct current output end DC1 < + >/DC 1 < - > of the flexible direct current converter valve simulation device is connected to the direct current output end DC2 < + >/DC 2 < + >, of the direct current bus power amplifier, and the three-phase alternating current input end U/V/W of the direct current bus power amplifier is connected to the alternating current power grid; the digital and analog signal ends IO1 and IO2 of the alternating current bus power amplifier are respectively connected to an external power system real-time digital simulation platform and a tested flexible direct current converter control and protection device, and the digital and analog signal ends IO3 and IO4 of the direct current bus power amplifier are respectively connected to the external power system real-time digital simulation platform and the tested flexible direct current converter control and protection device; wherein,,
the measurement and control optical fiber connected with the valve of the tested flexible direct current converter control and protection device is directly connected to the corresponding optical fiber interface end IO5 of the flexible direct current converter valve simulation device, and is used for simulating measurement and control of the tested flexible direct current converter control and protection device on the actual engineering flexible direct current converter valve;
the alternating current bus power amplifier exchanges analog or digital signals with the real-time digital simulation platform of the power system through IO1, and the three-phase alternating current voltage of the three-phase alternating current output end AO/BO/CO of the alternating current bus power amplifier is controlled according to the alternating current bus voltage output signal output by the real-time digital simulation platform of the power system;
the DC bus power amplifier performs analog or digital signal exchange with the real-time digital simulation platform of the power system through IO3, and controls the DC voltage or DC current of a DC output end DC1 < + >/DC 1 < - >, of the DC bus power amplifier according to the DC bus voltage or DC bus current output signal output by the real-time digital simulation platform of the power system;
the alternating current bus power amplifier transmits alternating current bus voltage, current and switching state signals to the tested flexible direct current converter control and protection device through a digital and analog signal end IO2, and the direct current bus power amplifier transmits direct current bus voltage, current and switching state signals to the tested flexible direct current converter control and protection device through a digital and analog signal end IO 4.
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| CN109387804B (en) * | 2017-08-09 | 2021-06-04 | 国网浙江省电力公司电力科学研究院 | Flexible direct system statistical method and metering device precision detection method and system |
| CN110726889B (en) * | 2019-09-24 | 2021-09-10 | 国电南瑞科技股份有限公司 | Test method and system for test model of large phase modulation machine transformer bank protection system |
| CN113791293B (en) * | 2021-09-03 | 2024-07-19 | 河南省高压电器研究所有限公司 | Low-voltage direct flow die test platform |
| WO2023060371A1 (en) * | 2021-10-11 | 2023-04-20 | 南方电网科学研究院有限责任公司 | Full-link simulation system |
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