CN105116874B - A kind of MMC submodules numeral physical mixed analogy method and system - Google Patents

A kind of MMC submodules numeral physical mixed analogy method and system Download PDF

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CN105116874B
CN105116874B CN201510418386.2A CN201510418386A CN105116874B CN 105116874 B CN105116874 B CN 105116874B CN 201510418386 A CN201510418386 A CN 201510418386A CN 105116874 B CN105116874 B CN 105116874B
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submodule
analogy
physical
control instruction
control
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CN105116874A (en
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俎立峰
董朝阳
胡四全
李坤
樊大帅
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State Grid Corp of China SGCC
XJ Electric Co Ltd
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State Grid Corp of China SGCC
XJ Electric Co Ltd
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00Testing or monitoring of control systems or parts thereof
    • G05B23/02Electric testing or monitoring
    • G05B23/0205Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0208Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
    • G05B23/0213Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols

Abstract

The present invention relates to a kind of MMC submodules numeral physical mixed analogy method and system, this method to include:It is determined that the digital simulation submodule number m of generation need to be simulated per the physical analogy submodule i in mutually each bridge armi;Valve control system issues m to physical analogy submodule iiIndividual control instruction, count miControl instruction number corresponding to the species of individual control instruction and each control instruction species, judge the control instruction that the physical analogy submodule performs;And physical analogy submodule i capacitance voltage and state are replicated into m respectivelyiPart is uploaded to valve control system.The system of the present invention includes valve control system and physical simulating device and digital simulator, and digital simulator is connected with physical simulating device and valve control system optical fiber.The method and system of the present invention can be greatly saved Material Cost on the premise of the quantity of physical analogy submodule is not increased with comprehensive verification valve control uniform voltage function.

Description

A kind of MMC submodules numeral physical mixed analogy method and system
Technical field
The invention belongs to the Technology of HVDC based Voltage Source Converter field of power system, and in particular to a kind of MMC submodules numeral thing Manage hybrid method and system.
Technical background
Modular multi-level flexible direct-current transmission (MMC-HVDC) is the HVDC Transmission Technology of a new generation.Except with tradition Outside D.C. high voltage transmission advantage, flexible direct current power transmission system directly can also power to small-sized island load at a distance, connection point Power supply is dissipated, operation control method is flexible and changeable, can reduce transmission line of electricity voltage landing and flickering, improves the quality of power supply.It is flexible straight Stream transmission of electricity has greater advantage in the relatively conventional direct current transportation of the construction of DC distribution net, island power supply, Power System Interconnection etc..
Flexible direct current transmission converter valve is composed in series by submodule, is carried with the continuous of voltage class of flexible DC power transmission Height, soft straight converter valve submodule quantity are also being sharply increased, and generally each bridge arm is made up of hundreds of submodules.Flexible direct current is defeated Electric change of current valve control system is the device for being directly connected to control submodule, and its Core Feature is that submodule is pressed.Submodule quantity Increase to valve control system test checking just bring extreme difficulty.
Traditional valve control uniform voltage function test is connected survey using the physical analogy submodule reduced by relevant parameter with valve control Examination.The physical analogy submodule to control the size limited is also accordingly reduced control parameter in valve control.Therefore, valve control access submodule Quantity is far smaller than maximum access quantity amount.
And if using on a sub- module interface of valve control access a physical analogy submodule connecting test, that Need to produce a large amount of physical analogy submodules.It can not receive in cost.Therefore, it is badly in need of designing a kind of ASM system, To use less physical analogy submodule, reach the comprehensive verification to valve control system uniform voltage function.
The content of the invention
The invention provides a kind of MMC submodules numeral physical mixed analogy method and system, it is intended to solves traditional valve Function test method is controlled in comprehensive verification valve control uniform voltage function, due to needing to use a large amount of physical analogy submodules to cause cost The problem of too high.
To solve the above problems, a kind of MMC submodules numeral physical mixed analogy method of the present invention, comprises the following steps:
1) for a physical analogy submodule i, for simulating the m being in same bridge armiIndividual submodule, physics submodule Block is actual submodule, and i is physical analogy submodule sequence number;
2) valve control system issues m to physical analogy submodule iiIndividual control instruction, count miThe species of individual control instruction and every Control instruction number corresponding to individual control instruction species, if whole control instructions are locking, physical analogy submodule i is performed Lock-in control instructs;If input control number of instructions is more than or equal to excision control instruction number, physical analogy submodule i is performed Input control instructs, and otherwise, performs excision control instruction;It is and physical analogy submodule i capacitance voltage and state is multiple respectively M processediPart represents miThe capacitance voltage and state of individual submodule are uploaded to valve control system.
A kind of MMC submodules numeral physical mixed simulation system of the present invention, the system includes valve control system, in addition to is used for Digital simulator corresponding with each bridge arm, digital simulator connect several in valve control system and each bridge arm by optical fiber Physical analogy submodule;The digital simulator determines that each physical analogy submodule needs the digital simulation submodule simulated Number mi, the control instruction that valve control system issues is received, after judging by analysis, is handed down to corresponding physical analogy submodule, And the capacitance voltage of each physical analogy submodule and state are replicated into m respectivelyiValve control system is uploaded to after part.
The digital simulator is provided with corresponding per mutually every bridge arm switch board Neutron module interface with valve control system Optical fiber interface.
MMC submodules numeral physical mixed analogy method and system of the present invention, are mutually tied by digital simulation with physical analogy The method of conjunction simulates multiple digital simulation submodules, so as to add the ASM quantity of cut-in valve control, is not increasing On the premise of the quantity of physical analogy submodule, Material Cost can be greatly saved with comprehensive verification valve control uniform voltage function.
Brief description of the drawings
The control of Fig. 1 conventional valves and submodule connection figure;
Fig. 2 numeral physical mixed ASM systems;
Fig. 3 numeral physical mixed environmental simulation submodule block instruction product process figures.
Embodiment
Technical scheme is further described in detail below in conjunction with the accompanying drawings.
MMC submodule numeral physical mixed analogy method embodiments
MMC submodule numeral physical mixed analogy methods comprise the following steps:
1) for a physical analogy submodule i, for simulating the m being in same bridge armiIndividual submodule, physics submodule Block is actual MMC submodules, and i is physical analogy submodule sequence number;
2) valve control system issues m to physical analogy submodule iiIndividual control instruction, count miThe species of individual control instruction and every Control instruction number corresponding to individual control instruction species, if whole control instructions are locking, physical analogy submodule i is performed Lock-in control instructs;If input control number of instructions is more than or equal to excision control instruction number, physical analogy submodule i is performed Input control instructs, and otherwise, performs excision control instruction;It is and physical analogy submodule i capacitance voltage and state is multiple respectively M processediPart represents miThe capacitance voltage and state of individual submodule are uploaded to valve control system.
Above-mentioned steps are described in detail below:
As shown in figure 1, when valve control system submodule interface number much larger than actual physical analogy submodule number, With regard to needing to simulate the generation number corresponding per the submodule interface of mutually each bridge arm with valve control system by digital simulator Word ASM, to realize the comprehensive verification to valve control system function.
In the present embodiment by taking bridge arm in A phases as an example, the submodule interface for bridge arm in step 1) valve control system A phases is N It is individual, and actual physics ASM number is n, n<N, then, it is determined that per the physical analogy submodule i in mutually each bridge arm The digital simulation submodule number m of generation need to be simulatedi, that is, have N=m1+m2+…+mn, i=1,2,3 ..., n;.
It is preferably to be directed to each physical analogy submodule in the present embodiment, simulation generates m digital simulation submodule, i.e., The number of digital simulation submodule is identical corresponding to each physics submodule.
Certainly other embodiment is used as, the digital simulation submodule number of each physical analogy submodule simulation can not Together, as long as the total number of digital simulation submodule is equal to N.
The control instruction that physical analogy submodule is handed down to for valve control system in step 2) is defined as CI, m, wherein i is real Border physical analogy submodule block number, i=1,2 ... n.M is digital simulation submodule block number;To corresponding to i-th of physics submodule The control instruction C that digital simulation submodule receivesI, 1、CI, 2…CI, mIt is individual corresponding to the species of middle control instruction and each species Number is counted, and the species of control instruction includes locking, input and excision, if the number of input control instruction is more than or equal to excision The number of control instruction, then the control instruction of i-th of physical analogy submodule is input control instruction, if CI, 1、CI, 2…CI, mIn All control instructions are lock-in control instruction, and the control instruction of i-th of physical analogy submodule instructs for lock-in control, no Then, the control instruction of i-th of physical analogy submodule is excision control instruction.
N physical analogy submodule capacitor voltage is defined as U in the present embodimenti, i=1,2 ... n;By n physics mould Intend submodule bulk state and be defined as Si, i=1,2 ... n, Si=0 instruction submodule is normal, Si=1 instruction sub-module fault.So, For physical analogy submodule i capacitance voltage UiWith state Si, make m digital simulation corresponding with physical analogy submodule i The capacitance voltage of submodule is UI, 1=UI, 2=...=UI, m=Ui;Order m number type matrix corresponding with physical analogy submodule i The state for intending submodule is SI, 1=SI, 2=...=SI, m=Si, i.e., respectively by physical analogy submodule i capacitance voltage UiAnd shape State SiReplicate that m parts represent the capacitance voltage of m digital simulation submodule and state uploads to valve control system by optical fiber respectively.
Similarly, to bridge arm under valve control system A phases, the upper and lower bridge arm of B phases, the upper and lower bridge arm submodule interface of C phases is using above-mentioned Analogy method, realize the checking of valve control uniform voltage function.
MMC submodule numeral physical mixed simulation system embodiments
Traditional valve control system function test system as shown in figure 1, the present embodiment in traditional valve control system functional test Digital simulator is added in system, as shown in Fig. 2 the system in the present embodiment includes valve control system, for each bridge arm Corresponding digital simulator, digital simulator connect several physical analogys in valve control system and each bridge arm by optical fiber Submodule;Digital simulator determines that each physical analogy submodule needs the digital simulation submodule number m simulatedi, receive The control instruction that valve control system issues, and control instruction is analyzed according to the comparative approach in above-mentioned analogy method step 2) After judgement, corresponding physical analogy submodule is handed down to, and the capacitance voltage of each physical analogy submodule and state are distinguished Replicate miValve control system is uploaded to after part.
Above-mentioned analogy method can be realized using the MMC submodule numeral physical mixed simulation systems in the present embodiment, On the premise of the quantity for not increasing physical analogy submodule, comprehensive verification valve control uniform voltage function, Material Cost is greatly saved.
In embodiments above, character express, formula explanation are carried out to sub- module simulation system.The present invention is not limited to Described embodiment.For those of ordinary skill in the art, according to the teachings of the present invention, the mould of various modifications is designed Type, formula, parameter simultaneously need not spend creative work.Without departing from the principles and spirit of the present invention to embodiment party The change, modification, replacement and modification that formula is carried out are still fallen within protection scope of the present invention.

Claims (3)

  1. A kind of 1. Modularized multi-level converter sub-module numeral physical mixed analogy method, it is characterised in that the simulation side Method is realized that the simulation system includes valve control system by Modularized multi-level converter sub-module numeral physical mixed simulation system Unite, for several physical analogy submodules in digital simulator corresponding with each bridge arm and each bridge arm, the numeral Analogue means connects several physical analogy submodules in the valve control system and each bridge arm by optical fiber;The analogy method Including:
    1) for a physical analogy submodule i, for simulating the m being in same bridge armiIndividual submodule, physics submodule are Actual module multilevel converter submodule, i are physical analogy submodule sequence number;
    2) valve control system issues m to physical analogy submodule iiIndividual control instruction, m is counted using digital simulatoriIndividual control refers to Control instruction number corresponding to the species of order and each control instruction species, if whole control instructions are locking, physics mould Intend submodule i and perform lock-in control instruction;If input control number of instructions is more than or equal to excision control instruction number, physics mould Intend submodule i and perform input control instruction, otherwise, perform excision control instruction;And digital simulator is utilized by physical analogy Submodule i capacitance voltage and state replicates m respectivelyiPart represents miThe capacitance voltage and state of individual submodule are uploaded to valve control system System.
  2. 2. a kind of Modularized multi-level converter sub-module numeral physical mixed simulation system, the system is including valve control system and respectively Several physical analogy submodules in bridge arm, it is characterised in that the system also includes being used for digital mould corresponding with each bridge arm Intend device, digital simulator connects several physical analogy submodules in valve control system and each bridge arm by optical fiber;It is described Digital simulator determines that each physical analogy submodule needs the digital simulation submodule number m simulatedi, receive valve control system The control instruction issued, after judging by analysis, be handed down to corresponding to physical analogy submodule, and by each physical analogy submodule The capacitance voltage and state of block replicate m respectivelyiValve control system is uploaded to after part;
    Analogy method corresponding to the Modularized multi-level converter sub-module numeral physical mixed simulation system specifically includes:1) For a physical analogy submodule i, for simulating the m being in same bridge armiIndividual submodule, physics submodule are actual mould Block multilevel converter submodule, i are physical analogy submodule sequence number;
    2) valve control system issues m to physical analogy submodule iiIndividual control instruction, m is counted using digital simulatoriIndividual control refers to Control instruction number corresponding to the species of order and each control instruction species, if whole control instructions are locking, physics mould Intend submodule i and perform lock-in control instruction;If input control number of instructions is more than or equal to excision control instruction number, physics mould Intend submodule i and perform input control instruction, otherwise, perform excision control instruction;And digital simulator is utilized by physical analogy Submodule i capacitance voltage and state replicates m respectivelyiPart represents miThe capacitance voltage and state of individual submodule are uploaded to valve control system System.
  3. 3. Modularized multi-level converter sub-module numeral physical mixed simulation system according to claim 2, its feature It is, the digital simulator is provided with and every mutually corresponding optical fiber per bridge arm switch board Neutron module interface in valve control system Interface.
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CN108918998B (en) * 2018-06-25 2020-11-20 南方电网科学研究院有限责任公司 MMC power module control protection closed-loop test method and system
CN111221322B (en) * 2020-01-07 2021-04-20 国家电网有限公司 Valve control system function detection system and simulation method, device and system

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