CN105527545A - DC power distribution network dynamic simulation experimental device and method - Google Patents

DC power distribution network dynamic simulation experimental device and method Download PDF

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Publication number
CN105527545A
CN105527545A CN201610091314.6A CN201610091314A CN105527545A CN 105527545 A CN105527545 A CN 105527545A CN 201610091314 A CN201610091314 A CN 201610091314A CN 105527545 A CN105527545 A CN 105527545A
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China
Prior art keywords
isolating switch
dynamic simulation
load
power supply
interface
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CN201610091314.6A
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Chinese (zh)
Inventor
沈鑫
马红升
张林山
曹敏
黄星
周年荣
闫永梅
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Electric Power Research Institute of Yunnan Power System Ltd
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Electric Power Research Institute of Yunnan Power System Ltd
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Priority to CN201610091314.6A priority Critical patent/CN105527545A/en
Publication of CN105527545A publication Critical patent/CN105527545A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/081Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/086Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors

Abstract

An embodiment of the invention discloses a DC power distribution network dynamic simulation experimental device and a DC power distribution network dynamic simulation experimental method. The DC power distribution network dynamic simulation experimental device comprises AC power supply systems, loads, load circuit breakers, a DC distribution circuit, circuit interfaces, circuit interface circuit breakers, DC circuits and high-voltage DC buses. The DC power distribution network dynamic simulation experiment method comprises the steps of accessing the DC circuits between the circuit interface circuit breakers, switching on the circuit interface circuit breakers, and switching on the load circuit breakers. By arranging the circuit interfaces in the DC distribution circuit, the DC power distribution network dynamic simulation experimental device can access DC cables or DC test instruments of different types, and the problem of single dynamic simulation and emulation experiment object of a DC power distribution network system is solved through operations of adjusting DC cable circuit parameters of the power distribution network dynamic simulation equipment and adding the DC testing instruments and the like.

Description

A kind of DC distribution net dynamic simulation experimental device and method
Technical field
The present invention relates to power transmission and distribution technical field, particularly relate to a kind of DC distribution net dynamic simulation experimental device and method.
Background technology
DC distribution net refers between power transmission network to user, with DC form by the interconnected energy transmission system formed of a large amount of DC terminal.DC distribution net adopts straight converter technique, utilizes thyristor and self-turn-off device to control to realize break-make, DC voltage is intermittently added in load.Compared to AC distribution net, the application of DC distribution net can realize the level and smooth access of new forms of energy and independence control that is meritorious, reactive power, provide the powering mode that adaptability is stronger, and flexible and safe distribution controls.From field of power transmission, DC distribution net and distributed power source access, equipment investment are low, and the quality of power supply is high, and power supply reliability is good, has huge development prospect.
Because DC distribution netting gear has a large amount of power electronic equipment, and each apparatus structure is complicated, comprises the switching device of a great deal of fast transient, and meanwhile, direct current network runs to be needed to observe the dynamic of long period.Therefore, direct current network modeling and simulating technology is faced with the challenge of Model suitability, accuracy.Existing DC distribution net dynamic similation platform comprises the dynamic similation of the direct-flow distribution system typical element such as voltage source converter, the generating of various distributed energy analogue means, energy storage device, DC power distribution line analogue means, all kinds of load simulation device, d-c transformer.
But existing DC distribution net dynamic simulation experiment research device simulated object is single, cannot by regulating the line parameter circuit value of power distribution network dynamic similation equipment and adding the operations such as DC test instrument, the dynamic similation of researching DC distribution network system and emulation experiment.
Summary of the invention
The invention provides a kind of DC distribution net dynamic simulation experimental device and method, cannot by regulating power distribution network dynamic similation device line parameter and adding the operations such as DC test instrument to solve in prior art, solve the dynamic similation of DC distribution net system and the single problem of emulation experiment simulated object.
In order to solve the problems of the technologies described above, the embodiment of the invention discloses following technical scheme:
A kind of DC distribution net dynamic simulation experiment method, comprises the following steps:
DC line is accessed between line interface isolating switch;
Closed circuit interface isolating switch;
Closed load break switch.
Preferably, DC distribution net dynamic simulation experiment method is further comprising the steps of:
Closed first Alternating Current Power Supply isolating switch, the second Alternating Current Power Supply isolating switch and bilateral line interface isolating switch, simulation ring-type DC distribution topological structure;
Closed first Alternating Current Power Supply isolating switch, the second Alternating Current Power Supply isolating switch and one-sided grid-connected circuit line interface isolating switch, simulation two ends DC distribution topological structure;
Closed first Alternating Current Power Supply isolating switch and single-ended grid-connected circuit line interface isolating switch, simulated emission shape DC distribution topological structure.
A kind of DC distribution net dynamic simulation experimental device, comprises ac power supply system, load, load break switch, DC power distribution line, line interface, line interface isolating switch, DC line and high voltage dc bus, wherein,
Ac power supply system is connected with DC power distribution line;
DC power distribution line is connected with high voltage dc bus;
Line interface is connected with DC power distribution line by line interface isolating switch;
DC line is connected with line interface;
Load is connected with high voltage dc bus by load break switch.
Preferably, DC line comprises direct current cables or DC test instrument.
Preferably, ac power supply system comprises the first Alternating Current Power Supply interface, the second Alternating Current Power Supply interface, the first Alternating Current Power Supply isolating switch, the second Alternating Current Power Supply isolating switch; Wherein, the first interchange interface exchanges interface one end with second and is connected with AC system respectively, and the other end is connected with high voltage dc bus with the second Alternating Current Power Supply isolating switch respectively by the first Alternating Current Power Supply isolating switch.
Preferably, DC distribution net dynamic simulation experimental device also comprises test interface, test interface comprises grid-connected circuit experimental interface and grid-connected circuit experimental interface isolating switch, and grid-connected circuit experimental interface is connected with high voltage dc bus by grid-connected circuit experimental interface isolating switch.
Preferably, DC distribution net dynamic simulation experimental device also comprises Blast Furnace Top Gas Recovery Turbine Unit (TRT) and Blast Furnace Top Gas Recovery Turbine Unit (TRT) isolating switch, and Blast Furnace Top Gas Recovery Turbine Unit (TRT) is connected with high voltage dc bus by Blast Furnace Top Gas Recovery Turbine Unit (TRT) isolating switch.
Preferably, DC distribution net dynamic simulation experimental device also comprises energy storage device and energy storage device isolating switch, and energy storage device is connected with high voltage dc bus by energy storage device isolating switch.
Preferably, DC distribution net dynamic simulation experimental device also comprises low-voltage direct bus and low-voltage direct transformer, and low-voltage direct bus is connected with high voltage dc bus by low-voltage direct transformer.
Preferably, load comprises high-voltage linear load, high pressure nonlinear load, low-pressure linear load, low pressure nonlinear load, DC load and AC load, wherein high-voltage linear load, high pressure nonlinear load, DC load are connected with high voltage dc bus by load break switch with AC load, and low-pressure linear load is connected with low-voltage direct bus by load break switch with low pressure nonlinear load.
Preferably, DC distribution net dynamic simulation experimental device also comprises synchronous motor, asynchronous machine and motor breaking device, and synchronous motor is connected with low-voltage direct bus by motor breaking device with asynchronous machine.
From above technical scheme, DC distribution net dynamic simulation experiment method provided by the invention and device, be included between line interface isolating switch and access DC line, the step of closed circuit interface isolating switch and closed load break switch.By arranging line interface in DC power distribution line, make DC distribution net dynamic simulation experimental device can access dissimilar direct current cables or DC test instrument, then by regulating the direct current cables line parameter circuit value of power distribution network dynamic similation equipment and adding the operations such as DC test instrument, the dynamic similation of DC distribution net system and the single problem of emulation experiment simulated object is solved.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, for those of ordinary skills, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The first DC distribution net dynamic simulation experimental device structural representation that Fig. 1 provides for the embodiment of the present invention;
The second DC distribution net dynamic simulation experimental device structural representation that Fig. 2 provides for the embodiment of the present invention;
The third DC distribution net dynamic simulation experimental device structural representation that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Technical scheme in the present invention is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
Fig. 1 is the electrical block diagram of DC distribution net dynamic simulation experimental device, as seen from the figure, DC distribution net dynamic simulation experimental device comprises load, load break switch, line interface isolating switch, DC power distribution line, line interface and high voltage dc bus, wherein, DC power distribution line is connected with high voltage dc bus, line interface is connected with DC power distribution line by line interface isolating switch, and load is connected with high voltage dc bus by load break switch.
The second DC distribution net dynamic simulation experimental device structural representation that Fig. 2 provides for the embodiment of the present invention, as seen from the figure, DC distribution net dynamic simulation experimental device also comprises the first Alternating Current Power Supply interface, the second Alternating Current Power Supply interface, the first Alternating Current Power Supply isolating switch 1, second Alternating Current Power Supply isolating switch 18; Wherein, the first interchange interface and described second exchanges interface one end and is connected with AC system respectively, and the other end is connected with the second Alternating Current Power Supply isolating switch 18 with the first Alternating Current Power Supply isolating switch 1 respectively.The third DC distribution net dynamic simulation experimental device structural representation that Fig. 3 provides for the embodiment of the present invention, as seen from Figure 3, the first Alternating Current Power Supply isolating switch 1 is connected with high voltage dc bus by rectification link (AC/DC device) device with the second Alternating Current Power Supply isolating switch 18.
DC distribution net dynamic simulation experimental device provided by the invention with exchange Infinite bus system and have two place's interfaces, be respectively the first Alternating Current Power Supply interface and the second Alternating Current Power Supply interface.Infinite bus system calculates according to the ratio of net capacity.The capacity exchanging Iarge-scale system at least will reach more than 10 times of experimental system capacity, just can regard infinitely great AC system as relative to the capacity of direct current distribution experimental system.Therefore experimental provision provided by the invention is access via telephone line with the two place's access points exchanging Iarge-scale system, and installs isolating transformer additional in ac grid system outside, and the power system capacity after conversion reaches 250kVA, meets the condition exchanging Infinite bus system completely.Alternating Current Power Supply device is connected with high voltage dc bus by Alternating Current Power Supply isolating switch.
In distribution network systems, voltage is generally 10.5kV, and capacity is more than 1000kVA, selects voltage ± 380V in the present invention, capacity 25kVA, and therefore power analog ratio is:
m p = P s P m = 1000 25 = 40 ,
Wherein, subscript S (source) represents the physical quantity of prototype system, and m (model) then represents the physical quantity of simulation system.
Voltage analog ratio is:
m v = U s U m = 10500 380 = 27.63 ,
Current analog ratio is:
m i = m p m v = 40 27.63 = 1.45 ,
The maximum current of simulation system is
I m a x = 100 1.45 = 70.0 A .
As seen from Figure 3, DC distribution net dynamic simulation experimental device test interface provided by the invention also comprises grid-connected circuit experimental interface and grid-connected circuit experimental interface isolating switch 22 and/or 23, and grid-connected circuit experimental interface is connected with high voltage dc bus by grid-connected circuit experimental interface isolating switch.Grid-connected circuit experimental interface can connect DC circuit breaker, d-c transformer and new development equipment etc.By closed grid-connected circuit experimental interface isolating switch 22 and/or 23, by DC circuit breaker, d-c transformer and/or new development equipment access pilot system, operation can be carried out under dissimilar fault to distinct device and controls and relay protection research.Wherein, d-c transformer can connect DC energy storage power supply and DC load, tests the performance of d-c transformer; Also can by accessing the characteristic of the dissimilar more dissimilar DC load of DC load; And the impact studied energy storage device and direct-flow distribution system is run is accessed by DC energy storage.
DC distribution net dynamic simulation experimental device comprises Blast Furnace Top Gas Recovery Turbine Unit (TRT) and Blast Furnace Top Gas Recovery Turbine Unit (TRT) isolating switch 26,27 and 28, and Blast Furnace Top Gas Recovery Turbine Unit (TRT) is connected with high voltage dc bus with 28 by Blast Furnace Top Gas Recovery Turbine Unit (TRT) isolating switch 26,27.Blast Furnace Top Gas Recovery Turbine Unit (TRT) is grid-connected power generation system, comprises the generating of biomass power generation electric battery, aerogenerator and photovoltaic array.Alternating voltage is converted on DC voltage access high voltage dc bus as interchange distributed power source through rectification link (AC/DC device) by wind-power electricity generation; Biomass power generation electric battery and photovoltaic array generating access on high voltage dc bus through dc chopper (DC/DC device) as direct current distributed power source.
DC distribution net dynamic simulation experimental device also comprises energy storage device and energy storage device isolating switch 29 and 30, and energy storage is connected with high voltage dc bus with 30 by energy storage device isolating switch 29.All types of energy storage devices accesses on high direct voltage bus by dc chopper (DC/DC device), the dc chopper (DC/DC device) connecting energy storage device needs to carry out charge and discharge to energy storage device, needs to possess energy in bidirectional flow function.Energy storage device provided by the invention comprises super capacitor energy-storage equipment and batteries to store energy equipment.Ultracapacitor is as a kind of emerging energy storage device, and use special material to make electrode and electrolyte, its memory capacity is 20 ~ 1000 times of ordinary capacitor, but maintains the fast feature of fault offset.Batteries to store energy equipment is made up of parts such as battery, straight-friendship inverter, control device and utility appliance.Accumulator is divided into a variety of, and in large-scale energy storage system, current domestic and international application accumulator that is comparatively wide, technology relative maturity has lead-acid accumulator, sodium-sulphur battery and liquid vanadium cell.The preferred lead-acid accumulator of the present invention, its low cost, is convenient to the test of DC distribution net.
DC distribution net dynamic simulation experimental device provided by the invention has two DC voltage level, and high-voltage dc voltage is ± 380V, and low-voltage dc voltage is ± 220V, powers for giving the load of different electric pressure.Direct current ± 380 bus is mainly in order to mate the DC voltage level of industrial standard, and it accesses main electrical network by rectifier and circuit of power factor correction; Direct current ± 220V bus is mainly in order to mate the DC voltage level of communication standard, and it is connected with ± 380V bus by d-c transformer.Layer-stepping bus structure can reduce the use of power supply adaptor, and on the other hand, two kinds of electric pressures are isolated by d-c transformer, improves the security of powering for low-voltage equipment.
DC distribution net dynamic simulation experimental device provided by the invention load comprises high-voltage linear load, high pressure nonlinear load, low-pressure linear load, low pressure nonlinear load, DC load and AC load, wherein high-voltage linear load, high pressure nonlinear load, DC load and AC load are connected with high voltage dc bus with 25 respectively by load break switch 19,21,20, and low-pressure linear load is connected with low-voltage direct bus with 33 respectively by load break switch 32 with low pressure nonlinear load.AC load and nonlinear load access on high direct voltage bus by rectification link (AC/DC device); Linear load accesses on high direct voltage bus by dc chopper (DC/DC device); DC load is by d-c transformer access high direct voltage bus.
DC distribution net dynamic simulation experimental device provided by the invention also synchronous motor, asynchronous machine and motor breaking device 34 and 35.Synchronous motor and described asynchronous machine are accessed on low-voltage direct bus by rectification link (AC/DC device).The break-make of motor breaking device 34 and 35 difference control synchronization motor and asynchronous machine.Under the condition that synchronous motor and asynchronous machine can have a power failure completely in system, disconnect the first Alternating Current Power Supply isolating switch 1 and 2, second Alternating Current Power Supply isolating switch 17 and 18, carry out associated straight and banish electrical network simulation test.
DC distribution net dynamic simulation experiment method comprises the following steps: between line interface isolating switch, access different model, different manufacturers, have the DC line cable of difference in functionality, as single core cable, polycore cable or subsea DC cable, closed circuit interface isolating switch 3,4,5,6,7,8,9,10,11,12,13,14 and/or 15,16, closed load break switch 19,20,21,25,32 and/or 33, dynamic simulation experiment is carried out to DC distribution net.By arranging line interface in DC power distribution line, make DC distribution net dynamic simulation experimental device can access dissimilar direct current cables, then by regulating the circuit cable parameter of power distribution network dynamic similation equipment, the Dynamic simulation experiment of analog DC distribution network system.Also DC test instrument can be accessed, the AC compounent in the circuit direct electric current in test DC distribution net System Dynamic Model process, voltage, ripple current and DC circuit loop between line interface isolating switch.
DC distribution net dynamic simulation experiment method is further comprising the steps of: closed first Alternating Current Power Supply isolating switch 1 and 2, second Alternating Current Power Supply isolating switch 17 and 18 and bilateral line interface isolating switch 3-16, simulation ring-type DC distribution topological structure; Closed first Alternating Current Power Supply isolating switch 1 and 2, second Alternating Current Power Supply isolating switch 17 and 18 and one-sided grid-connected circuit line interface isolating switch 3-10, simulation two ends DC distribution topological structure; Closed first Alternating Current Power Supply isolating switch 1 and 2 and single-ended grid-connected circuit line interface isolating switch 3,4 or/and 15,16, simulated emission shape DC distribution topological structure.
The ring-type DC distribution topological structure that the embodiment of the present invention provides has Double-End Source, improve power supply reliability, ring-type DC distribution topological structure comprises many direct current supply lines and DC bus simultaneously, improves the dirigibility of distributed power source and energy storage device access.The system investments of this kind of topological structure is large, and service area is large, and reliability is high, but network is more complicated, and therefore difficulty is larger with protecting control coordinates etc. for its Fault Identification.Radial DC distribution topological structure structure is simple, and investment cost is low, and Fault Identification and protecting control cooperation etc. are relatively easy, but power supply reliability is poor, and along with the increase of load, DC voltage can decline along with the direction of trend flowing.And easily there is power-off fault.Two ends direct current joins topological electric structure and AC system has two access points; compare power supply reliability with radial structure to increase; usually the interchange interface having one end in the DC distribution net of two ends adopts determines Control of Voltage; all the other exchange interfaces adopt constant dc power control, therefore two ends distribution structure Control protection and coordinate relative complex.In existing DC power-supply system, adopt two ends formula electric power-feeding structure as ship power supply system, power supply system of electric traction etc. are most.DC distribution net dynamic simulation experiment method provided by the invention can carry out ring-type, the radial mutual conversion with two ends formula 3 kinds of topological structures by the switching of the mode of connection, operating mode under simulation different running method, simulates with this and studies the feature of three kinds of different topology structures and respective advantage.
Each embodiment in this instructions all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments.Especially, for device or system embodiment, because it is substantially similar to embodiment of the method, so describe fairly simple, relevant part illustrates see the part of embodiment of the method.Apparatus and system embodiment described above is only schematic, the wherein said unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
It should be noted that, in this article, the such as relational terms of " first " and " second " etc. and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
The above is only the specific embodiment of the present invention, those skilled in the art is understood or realizes the present invention.To be apparent to one skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
The above is only the specific embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (11)

1. a DC distribution net dynamic simulation experiment method, is characterized in that, described DC distribution net dynamic simulation experiment method comprises the following steps:
DC line is accessed between line interface isolating switch;
Closed circuit interface isolating switch;
Closed load break switch.
2. DC distribution net dynamic simulation experiment method according to claim 1, is characterized in that, described DC distribution net dynamic simulation experiment method is further comprising the steps of:
Closed first Alternating Current Power Supply isolating switch, the second Alternating Current Power Supply isolating switch and bilateral line interface isolating switch, simulation ring-type DC distribution topological structure;
Closed first Alternating Current Power Supply isolating switch, the second Alternating Current Power Supply isolating switch and one-sided grid-connected circuit line interface isolating switch, simulation two ends DC distribution topological structure;
Closed first Alternating Current Power Supply isolating switch and single-ended grid-connected circuit line interface isolating switch, simulated emission shape DC distribution topological structure.
3. a DC distribution net dynamic simulation experimental device, is characterized in that, comprises ac power supply system, load, load break switch, DC power distribution line, line interface, line interface isolating switch, DC line and high voltage dc bus, wherein,
Described ac power supply system is connected with described DC power distribution line;
Described DC power distribution line is connected with described high voltage dc bus;
Described line interface is connected with described DC power distribution line by described line interface isolating switch;
Described DC line is connected with line interface;
Described load is connected with described high voltage dc bus by described load break switch.
4. DC distribution net dynamic simulation experimental device according to claim 3, is characterized in that, described DC line comprises direct current cables or DC test instrument.
5. DC distribution net dynamic simulation experimental device according to claim 3, is characterized in that, described ac power supply system comprises the first Alternating Current Power Supply interface, the second Alternating Current Power Supply interface, the first Alternating Current Power Supply isolating switch, the second Alternating Current Power Supply isolating switch; Wherein, described first interchange interface and described second exchanges interface one end and is connected with AC system respectively, and the other end is connected with described high voltage dc bus with described second Alternating Current Power Supply isolating switch respectively by described first Alternating Current Power Supply isolating switch.
6. DC distribution net dynamic simulation experimental device according to claim 3, it is characterized in that, described DC distribution net dynamic simulation experimental device also comprises test interface, described test interface comprises grid-connected circuit experimental interface and grid-connected circuit experimental interface isolating switch, and described grid-connected road test interface is connected with described high voltage dc bus by described grid-connected circuit experimental interface isolating switch.
7. DC distribution net dynamic simulation experimental device according to claim 3, it is characterized in that, described DC distribution net dynamic simulation experimental device also comprises Blast Furnace Top Gas Recovery Turbine Unit (TRT) and Blast Furnace Top Gas Recovery Turbine Unit (TRT) isolating switch, and described Blast Furnace Top Gas Recovery Turbine Unit (TRT) is connected with described high voltage dc bus by described Blast Furnace Top Gas Recovery Turbine Unit (TRT) isolating switch.
8. DC distribution net dynamic simulation experimental device according to claim 3, it is characterized in that, described DC distribution net dynamic simulation experimental device also comprises energy storage device and energy storage device isolating switch, and described energy storage device is connected with described high voltage dc bus by described energy storage device isolating switch.
9. DC distribution net dynamic simulation experimental device according to claim 3, it is characterized in that, described DC distribution net dynamic simulation experimental device also comprises low-voltage direct bus and low-voltage direct transformer, and described low-voltage direct bus is connected with described high voltage dc bus by described low-voltage direct transformer.
10. the DC distribution net dynamic simulation experimental device according to claim 3 or 9, it is characterized in that, described load comprises high-voltage linear load, high pressure nonlinear load, low-pressure linear load, low pressure nonlinear load, DC load and AC load, wherein said high-voltage linear load, high pressure nonlinear load, DC load are connected with described high voltage dc bus by described load break switch with AC load, and described low-pressure linear load is connected with described low-voltage direct bus by described load break switch with low pressure nonlinear load.
11. DC distribution net dynamic simulation experimental device according to claim 3 or 9, it is characterized in that, described DC distribution net dynamic simulation experimental device also comprises synchronous motor, asynchronous machine and motor breaking device, and described synchronous motor is connected with described low-voltage direct bus by described motor breaking device with described asynchronous machine.
CN201610091314.6A 2016-02-18 2016-02-18 DC power distribution network dynamic simulation experimental device and method Pending CN105527545A (en)

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Application publication date: 20160427