CN107834518B - Identification method for distributed arrangement of submodules - Google Patents

Identification method for distributed arrangement of submodules Download PDF

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Publication number
CN107834518B
CN107834518B CN201711089293.5A CN201711089293A CN107834518B CN 107834518 B CN107834518 B CN 107834518B CN 201711089293 A CN201711089293 A CN 201711089293A CN 107834518 B CN107834518 B CN 107834518B
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sub
module
modules
valve control
control device
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CN107834518A (en
Inventor
丁久东
卢宇
董云龙
鲁江
姜崇学
李海英
田杰
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NR Electric Co Ltd
NR Engineering Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
    • H02H7/1227—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to abnormalities in the output circuit, e.g. short circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
    • 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]

Abstract

The invention provides an identification method for sub-module decentralized arrangement, which is characterized in that maintenance personnel identify the topological type of a sub-module and set a configuration value of a valve control device, or the sub-module sends the topological type information of the sub-module to the valve control device, the valve control device identifies the topological type of the sub-module according to the configuration value and generates control and protection behaviors of the corresponding sub-module, so that the decentralized arrangement of the sub-modules is supported, and the overhaul and maintenance of the sub-modules are facilitated.

Description

Identification method for distributed arrangement of submodules
Technical Field
The invention belongs to the technical field of power electronics, and particularly relates to a method for identifying dispersed arrangement of submodules.
Background
The flexible DC transmission is a new type of DC transmission technology and features that it adopts voltage source converter based on full-controlled device and pulse width modulation technology to transmit DC. The flexible direct current transmission is very suitable for being applied to the fields of renewable energy grid connection, distributed power generation grid connection, island power supply, urban power grid power supply, asynchronous alternating current power grid interconnection and the like. The converter is a core device of a flexible direct current technology, and a Modular Multilevel Converter (MMC) is a preferred scheme of the current flexible direct current engineering due to the advantages of modular design, low switching frequency, good harmonic performance and the like.
At present, flexible direct current engineering based on an MMC scheme which is put into operation adopts a half-bridge sub-module based modular multilevel converter (HB-MMC) scheme, when a short-circuit fault occurs on a direct current side of the converter, an alternating current power supply, an anti-parallel diode in the half-bridge sub-module and the short-circuit fault point form a short-circuit loop, and because the technology and the manufacturing process of a high-voltage direct current breaker at the present stage are not mature, the fault loop needs to be cut off by breaking the alternating current breaker and the fault current needs to be restarted after being naturally attenuated to 0, the scheme has longer time delay for recovering power supply, and the power supply reliability is reduced.
In order to enable the converter to have the capability of clearing direct-current faults, a plurality of novel topologies are proposed by domestic and foreign scholars. Among them, the proposed MMC, the german scholars r.marquart, proposes a generalized MMC concept using sub-modules as basic power units and proposes a new sub-module topology such as full bridge sub-modules (FBSM). However, a full bridge sub-module based modular multilevel converter (FB-MMC) based on a full bridge sub-module has many switching devices, a low utilization rate of the switching devices, and a large running loss. For this reason, WO2012103936a1 proposes a hybrid modular multilevel converter (HBFB-MMC) scheme based on half-bridge and full-bridge sub-modules, which has the advantages of both HB-MMC and FB-MMC, reduces the number of switching devices compared with the FB-MMC scheme while having a dc fault clearing capability, and even more types of sub-module topologies and hybrid modular multilevel converter schemes composed of these sub-modules will appear in the future, so that the hybrid modular multilevel converter scheme has a wide application prospect.
The conventional modular multilevel converter based on half-bridge or full-bridge sub-modules has the same topology type of all sub-modules, and the control and protection behaviors of all the sub-modules are similar, so that the configuration method of the control system is relatively simple. The hybrid modular multilevel converter at least comprises two sub-modules, the control and protection behaviors of different sub-modules are different, under the condition that the sub-modules are distributed, a control system of the hybrid modular multilevel converter needs to identify different sub-module types and generate different control and protection behaviors according to preset corresponding relations, and related reports of a sub-module topology type identification method are not found at present, so that the sub-module identification method of the hybrid modular multilevel converter needs to be invented.
Disclosure of Invention
The invention aims to provide a submodule identification method of a hybrid modular multilevel converter, which can identify the topological type of a submodule so as to generate different control and protection behaviors according to the type of the submodule.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for identifying distributed sub-modules, each valve control device controls N sub-modules, and the identification method of the valve control sub-modules comprises the following steps:
(1) each valve control device is provided with N configuration values corresponding to the topology types of the N sub-modules;
(2) the valve control device receives the topology type information of the N sub-modules and assigns the topology type information to the N configuration values in the step (1);
(3) the valve control device reads the configuration value and generates corresponding control and protection behaviors according to the configuration value.
The sub-module topology type comprises a half-bridge sub-module, a full-bridge-like sub-module, a clamping dual sub-module and a damping sub-module.
The method for identifying the topological type of the sub-module by the valve control device can be as follows:
(1) and after reading the topological type information of the sub-modules, setting corresponding configuration values, reading the configuration values by the valve control device, and identifying the topological types of the sub-modules according to the set corresponding relation.
(2) The sub-modules send sub-module topology type information to the valve control device, the valve control device reads the sub-module topology type information and stores the sub-module topology type information as a configuration value, and the sub-module topology type is identified according to the set corresponding relation.
(3) And reading the sub-module topology type information, setting a corresponding configuration value, sending the sub-module topology type information to the valve control device by the sub-module, checking the set configuration value by the valve control device and the sub-module topology type information sent to the valve control device by the sub-module, if the two are consistent, checking the set configuration value and the sub-module topology type information, identifying the sub-module topology type according to the set corresponding relation, and if the two are inconsistent, checking the sub-module which is failed and bypasses the corresponding sub.
After the scheme is adopted, the invention has the beneficial effects that:
(1) and the distributed arrangement of the submodules is supported, so that the overhaul and maintenance of the submodules are facilitated.
Drawings
FIG. 1 is a first submodule identification method, in which SM is a submodule;
FIG. 2 is a second sub-module identification method, in which SM is a sub-module;
FIG. 3 illustrates a third sub-module identification method, wherein SM is a sub-module;
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
A method for identifying distributed sub-modules, each valve control device controls N sub-modules, and the identification method of the valve control sub-modules comprises the following steps:
(1) each valve control device is provided with N configuration values corresponding to the topology types of the N sub-modules;
(2) the valve control device receives the topology type information of the N sub-modules and assigns the topology type information to the N configuration values in the step (1);
(3) the valve control device reads the configuration value and generates corresponding control and protection behaviors according to the configuration value.
The sub-module topology type comprises a half-bridge sub-module, a full-bridge-like sub-module, a clamping dual sub-module and a damping sub-module.
Referring to fig. 1, a maintainer reads the sub-module topology type information and then sets a corresponding configuration value, and a valve control device reads the configuration value and identifies the sub-module topology type according to a predetermined corresponding relationship.
And a second method for identifying the valve control submodule is shown in fig. 2, wherein the submodule sends submodule topology type information to the valve control device, the valve control device reads the submodule topology type information and stores the submodule topology type information as a configuration value, and the submodule topology type is identified according to the set corresponding relation.
As shown in fig. 3, a maintainer reads the sub-module topology type information and then sets a corresponding configuration value, the sub-module sends the sub-module topology type information to the valve control device, the valve control device checks the set configuration value and the sub-module topology type information sent by the sub-module to the valve control device, if the two are consistent, the check is passed, the sub-module topology type is identified according to the set corresponding relationship, and if the two are not consistent, the check fails and bypasses the corresponding sub-module.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.

Claims (4)

1. A method for identifying distributed sub-modules, wherein each valve control device controls N sub-modules, is characterized in that the identification method is used for the sub-modules of a hybrid modular multilevel converter, and the identification method of the valve control sub-modules is as follows:
(1) each valve control device is provided with N configuration values corresponding to the topology types of the N sub-modules;
(2) the valve control device receives the topology type information of the N sub-modules and assigns the topology type information to the N configuration values in the step (1);
(3) the valve control device reads the configuration value and generates corresponding control and protection behaviors according to the configuration value;
the method for identifying the topological type of the sub-module by the valve control device comprises the following steps: and after reading the topological type information of the sub-modules, setting corresponding configuration values, reading the configuration values by the valve control device, and identifying the topological types of the sub-modules according to the set corresponding relation.
2. A method of identifying a decentralized arrangement of sub-modules according to claim 1, wherein: the sub-module topology type comprises a half-bridge sub-module, a full-bridge-like sub-module, a clamping dual sub-module and a damping sub-module.
3. The method for identifying the dispersed arrangement of the sub-modules as claimed in claim 1, wherein the method for the valve control device to identify the topology type of the sub-modules is as follows: the sub-modules send sub-module topology type information to the valve control device, the valve control device reads the sub-module topology type information and stores the sub-module topology type information as a configuration value, and the sub-module topology type is identified according to the set corresponding relation.
4. The method for identifying the dispersed arrangement of the sub-modules as claimed in claim 1, wherein the method for the valve control device to identify the topology type of the sub-modules is as follows: and reading the sub-module topology type information, setting a corresponding configuration value, sending the sub-module topology type information to the valve control device by the sub-module, checking the set configuration value by the valve control device and the sub-module topology type information sent to the valve control device by the sub-module, if the two are consistent, checking the set configuration value and the sub-module topology type information, identifying the sub-module topology type according to the set corresponding relation, and if the two are inconsistent, checking the sub-module which is failed and bypasses the corresponding sub.
CN201711089293.5A 2017-11-08 2017-11-08 Identification method for distributed arrangement of submodules Active CN107834518B (en)

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Publication number Priority date Publication date Assignee Title
CN111103486B (en) * 2019-12-23 2022-05-20 国家电网有限公司 Flexible direct current converter valve submodule type identification method and valve base controller

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101414925A (en) * 2007-10-17 2009-04-22 华为技术有限公司 Method, system and apparatus for configuring optical network terminal
CN103280894A (en) * 2013-06-14 2013-09-04 山东理工大学 Power distribution network control application network topology automatic identifying method
CN104300569A (en) * 2014-09-29 2015-01-21 华中科技大学 Short-circuit fault ride-through and recovery method for direct current side of HVDC on basis of mixed type MMC
CN106021767A (en) * 2016-05-27 2016-10-12 天津大学 Mixed type MMC topology submodule quantity configuration calculation method
CN106786707A (en) * 2015-11-23 2017-05-31 国网智能电网研究院 A kind of soft lineal system DC Line Fault restoration methods based on mixed topology transverter
CN107317472A (en) * 2017-06-30 2017-11-03 中国西电电气股份有限公司 A kind of full-bridge starts method with half-bridge mixed type module multilevel converter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101414925A (en) * 2007-10-17 2009-04-22 华为技术有限公司 Method, system and apparatus for configuring optical network terminal
CN103280894A (en) * 2013-06-14 2013-09-04 山东理工大学 Power distribution network control application network topology automatic identifying method
CN104300569A (en) * 2014-09-29 2015-01-21 华中科技大学 Short-circuit fault ride-through and recovery method for direct current side of HVDC on basis of mixed type MMC
CN106786707A (en) * 2015-11-23 2017-05-31 国网智能电网研究院 A kind of soft lineal system DC Line Fault restoration methods based on mixed topology transverter
CN106021767A (en) * 2016-05-27 2016-10-12 天津大学 Mixed type MMC topology submodule quantity configuration calculation method
CN107317472A (en) * 2017-06-30 2017-11-03 中国西电电气股份有限公司 A kind of full-bridge starts method with half-bridge mixed type module multilevel converter

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