CN102590743A - Dynamic analog simulation system of direct-current power supply - Google Patents
Dynamic analog simulation system of direct-current power supply Download PDFInfo
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- CN102590743A CN102590743A CN2012100583631A CN201210058363A CN102590743A CN 102590743 A CN102590743 A CN 102590743A CN 2012100583631 A CN2012100583631 A CN 2012100583631A CN 201210058363 A CN201210058363 A CN 201210058363A CN 102590743 A CN102590743 A CN 102590743A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
Abstract
The invention discloses a dynamic analog simulation system of a direct-current power supply, which comprises a storage battery, a charging cabinet, a control cabinet, a test cabinet, a resistance cabinet, a feeder cabinet, an emergency illumination cabinet, a communication power supply cabinet and an AC power distribution cabinet, wherein the communication power supply cabinet and the emergency illumination cabinet are electrically connected to the AC power distribution cabinet, the charging cabinet is used for converting AC of the AC power distribution cabinet into AC and storing the DC into the storage battery, the storage battery and the charging cabinet provide a DC power supply for the test cabinet and the feeder cabinet through a selective cabinet, a sliding resistor in the resistance cabinet is used for regulating the current in a test cabinet circuit, the control cabinet is used for controlling the test cabinet through a control switch, and the feeder cabinet is electrically connected to the storage battery. According to the dynamic analog simulation system, a reasonable selective protection scheme is recommended for the configuration of a DC system protection element, and the purposes of safety, practicability and accuracy are achieved in the electric power application.
Description
Technical field
The present invention relates to the electric equipment protection field, particularly, relate to a kind of direct supply dynamic simulative emulation system.
Background technology
DC power system is the visual plant that guarantees power network safety operation.During normal operation, straight-flow system is that isolating switch provides power switch, for relay protection and aut.eq., communication etc. provide direct supply; During fault, particularly under the situation of AC interruptions, straight-flow system be relay protection and aut.eq., isolating switch close tripping operation, emergency lighting provides safe and reliable direct supply.Straight-flow system is the basic assurance of relay protection of power system, aut.eq. and isolating switch correct operation.
But because improper, the differential cooperation of DC loop protection choice of equipment is unreasonable, the accident that the reasons such as moving or can not correctly excise short trouble of under failure condition, bypassing the immediate leadership causes or enlarges.Because the power supply content of generating plant and transforming station direct current system is many; Loop distribution is wide; In a DC network, often there are many branch roads need isolating switch be set or fuse is protected; And often being divided into three to level Four series connection, this just exists the how matching problem of selective protection between correct type selecting and the upper and lower level of protection electrical equipment.
So-called selective protection is meant in the distribution system cooperation of the current-time characteristic between two or several isolating switch or the fuse; When in given range, overcurrent fault occurring; Specify in the isolating switch or the fuse action of this scope action; And other isolating switch or fuse are failure to actuate, thereby will receive the number of loads of fault effects to remain on minimum degree.In straight-flow system; Different to the choosing of each transformer station's accumulator capacity, direct current cabinet and technical requirements such as monitoring and protection screen power supply mode, connected mode and protection importance degree because of various places power supply administration, its distributing position is with regard to corresponding difference, and the sectional area, the length that cause lead, conductor to be chosen are all different; The difference of these factors; The capital changes the loop resistance value, and the variation of resistance value also changes short-circuit current value thereupon, causes the short-circuit current at each station all different.
For satisfying the selectivity requirement of differential cooperation, mainly take following three kinds of methods:
(1) a kind of method is that last isolating switch of feed panel in the straight-flow system (or dividing electric screen) and the last isolating switch of monitoring and protection screen adopt man-to-man power supply mode; The problem that this mode causes is: two leads are all arranged between every pair of isolating switch; Distance between feed panel (or dividing electric screen) and the monitoring and protection screen is little then tens meters, rice up to a hundred at most, and this not only much but also longer lead ties together; The operation meeting of use through for many years produces complicated and chaotic problem, as: lead is connected loosening with isolating switch; The insulation of lead descends; Damage unexpectedly, bite; Harm such as mutual short circuit of multichannel under cover of the lead of weave in or arc discharge catch fire will cause monitoring and protection to shield the major hidden danger of comprehensive dead electricity;
(2) another kind of mode is blindly to strengthen the rated current of higher level's isolating switch; Difference through strengthening moving setting valve of upper and lower level isolating switch wink guarantees the selectivity requirement; Do like this and not only might cause higher level's isolating switch insufficient sensitivity, cause the isolating switch tripping, and economic and practical is relatively poor;
(3) for improving the selectivity requirement of differential cooperation; Also having a kind of mode is to realize selective protection for the small-sized DC isolating switch of catching up with the C type electrical apparatus release characteristic on the level master/minute electric screen; The monitoring and protection screen is selected the small-sized DC isolating switch of Type B tripping characteristic for use, and this kind mode exists the possibility of malfunction.
Summary of the invention
The objective of the invention is to; To the problems referred to above; Propose a kind of direct supply dynamic simulative emulation system, the isolating switch of thinking different model is with isolating switch, isolating switch and differential cooperation of fuse test platform is provided, and makes it in Electric Application, realize safe, practical and accurate advantage.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is:
A kind of direct supply dynamic simulative emulation system; Comprise accumulator, charging cabinet, switch board, experiment cabinet, resistor box, feeder line cabinet, emergency lighting cabinet, communication power supply cabinet and AC power distribution cabinet/AC distribution panel; Said communication power supply cabinet, emergency lighting cabinet are connected electrically in AC distribution cashier's office in a shop; Said charging cabinet converts the alternating current of AC power distribution cabinet/AC distribution panel into direct current; And this direct current saved in the accumulator, said accumulator and charging cabinet are that experiment cabinet, feeder line cabinet provide direct supply through SS, the swept resistance in the said resistor box is regulated the size of current in the experiment cabinet circuit; Said switch board is controlled experiment cabinet through CS, and said feeder line cabinet is connected electrically on the accumulator.
According to a preferred embodiment of the invention, said accumulator is two covers.
According to a preferred embodiment of the invention, said experiment cabinet is isolating switch and fuse extreme difference compatibility test platform.
According to a preferred embodiment of the invention, said system is connected with the computing machine of control total system.
According to a preferred embodiment of the invention; Be connected with the hyperchannel oscillograph in the circuit of said resistor box and experiment cabinet; This hyperchannel oscillograph obtains the current waveform of adjustable resistance loop and test loop respectively; The electric current variation tendency that is used for real time record extreme difference compatibility test process provides foundation for analyzing the cooperation of DC power system protecting component extreme difference.
Under the actual motion environment of technical scheme of the present invention through simulation distribution straight-flow system, dc circuit breaker and the breaking characteristics of fuse and the various differential coordinated scheme between them of different manufacturers different size commonly used; Build the differential compatibility test of straight-flow system station; Through to dc circuit breaker and a large amount of differential compatibility test of fuse under the direct-current short circuit condition; With homemade, import isolating switch and the differential registration property of fuse under multiple combination of grasping different manufacturers different model commonly used in the electric power engineering DC power supply system; Inquire into the condition of the selectivity action that realizes straight-flow system protecting components at different levels, reasonably have the scheme of selective protection for the configuration recommendation of dc system protection element.In Electric Application, realize safe, practical and accurate purpose to reach.
Other features and advantages of the present invention will be set forth in instructions subsequently, and, partly from instructions, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the instructions of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of instructions, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the electrical structure synoptic diagram of the described direct supply dynamic simulative emulation of embodiment of the invention system.
Wherein: 1-isolating switch test product; 2-fuse test product.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
As shown in Figure 1; A kind of direct supply dynamic simulative emulation system comprises accumulator, charging cabinet, switch board, experiment cabinet, resistor box, feeder line cabinet, emergency lighting cabinet, communication power supply cabinet and AC power distribution cabinet/AC distribution panel, and communication power supply cabinet, emergency lighting cabinet are connected electrically in AC distribution cashier's office in a shop; Charging cabinet converts the alternating current of AC power distribution cabinet/AC distribution panel into direct current; And this direct current saved in the accumulator, accumulator and charging cabinet are that experiment cabinet, feeder line cabinet provide direct supply through SS, the swept resistance in the resistor box is regulated the size of current in the experiment cabinet circuit; Switch board is controlled experiment cabinet through CS, and the feeder line cabinet is connected electrically on the accumulator.
Wherein, accumulator is two covers.Experiment cabinet is isolating switch and fuse extreme difference compatibility test platform.System is connected with the computing machine of control total system.
Be connected with the hyperchannel oscillograph in the circuit of resistor box and experiment cabinet; This hyperchannel oscillograph obtains the current waveform of adjustable resistance loop and test loop respectively; The electric current variation tendency that is used for real time record extreme difference compatibility test process provides foundation for analyzing the cooperation of DC power system protecting component extreme difference.
The direct supply feed system adopts the radial pattern supply network.Be straight-flow system dc load at different levels generally by the two-way direct supply, under normal circumstances one the tunnel work, another road is in hot stand-by duty; If work branch occurs under the abnormal conditions such as short circuit tripping operation, the stand-by power supply branch road can put into operation automatically;
System's realization event journal (SOE) function, related contents such as exquisite detail incident title, actuation time, event content are convenient to carry out faults analysis, judgement.The system communication function is strong, can realize the communication of multiple stipulations, different communication medias, can realize the communication with other system.
DC earthing detects: the ground connection branch road of DC power system bus and branch roads at different levels, grounding resistance, polarity etc. are detected in real time or show, and the fault branch situation is detected in real time.
The feeder line short-circuit protection is by the impact switching current that can correctly distinguish the ac hv breaker closing circuit and the short-circuit current of straight-flow system; Can realize the quick identification of DC power system short trouble and selectively excision; And the method for operation of the timely Adjustment System of ability, dc standby power is dropped into automatically.
Isolating switch can be realized on the spot, remote operation, and the isolating switch control device can correctly reflect the short trouble of straight-flow system, and excises fault branch fast, drops into corresponding emergency bypass, to improve the operational reliability of system.
The method of operation of direct supply feeder line realizes real-time monitoring of computer; Promptly can realize a distant place or on the spot to the control of the dc feeder method of operation; Dc feeder standby power supply branch road is dropped into or excision automatically, the state parameter of straight-flow system bus and each branch road is kept watch on.
The system configuration straight-flow system is control and protective device automatically, can monitor load current, the ground current (resistance) in each loop, and control each circuit breaker.Can also implement on-line monitoring to the running status and the operational factor of whole straight-flow system, can realize " four is distant " function.
Straight-flow system power switch branch road adopts ABB or equal imported product with control power branch isolating switch, and charged pneumatic operating mechanism, capacity are pressed the loop parameter configuration.Operation feed leg isolating switch adopts the dc circuit breaker of Beijing RenMin Electric Appliance Factory's band automatic time delay segmentation;
Straight-flow system should possess the emergency lighting automatic switching function.
The present invention also has the ground connection measuring ability
The automatic time of accomplishing the straight-flow system insulation detects, and testing process must not cause the fluctuation to the dc bus voltage-to-ground.
One utmost point ground connection and multipole earthing wire-selecting, and can realize the automatic detection that feed leg is being got lines crossed.
Realize the differentiation of multipoint earthing fault, in picture, in time show and warning, point out ground connection branch road and polarity.
Realize the real-time detection of state parameters such as straight-flow system busbar voltage, branch current.
Short-circuit protection function
Protective device possesses the requirement of selectivity, quick-action property, sensitivity, reliability.
Can classification excise the requirement of short circuits ability implementation phase formulas at different levels protection with ground or the two poles of the earth, strange land short trouble.
Can correctly distinguish high-voltage switch gear especially electromagnetic operating mechanism closing circuit impact switching current and short-circuit current.
After the direct current branch short circuit tripping operation, device can realize that the throwing of this branch road reclosing is moved back or the adjusting of reclosure time.
Can carry out distant place computer control to the straight-flow system circuit-breaker status, Backup Power Switch is all established soft pressing plate throwing and is moved back.
The standby power supply branch road drops into function automatically:
Behind the work branch dc circuit breaker protection would trip, the powered operation mode of device ability automatic time Adjustment System drops into emergency bypass automatically.
The present invention can also be installed flasher additional at dc bus as required.Device can be realized the automatic generation and the emergency review of data sheet.
Software of the present invention can be divided into the five functional module: module, output module etc. are as a result checked in DBM, line configuring module, protection electrical equipment type selecting module, the analysis of protection electrical equipment.Wherein protecting the electrical equipment analysis to check module comprises: lead/cable pressure drop checks, protects electrical equipment sensitivity check, rated current to check, WV is checked and the superior and the subordinate's isolating switch selective protection is checked.The theory of this The software adopted modular design, convenient management and maintenance are for the upgrading of software later on lays the first stone.
1, DBM
Database section is the basis of total system, and playing a part to arrange with the element type selecting for circuit provides basic data, for checking calculating criteria parameter is provided.The design of library structure is a criterion with the requirement of database design three big normal forms, and plans according to actual needs, guarantees that increase, modification, deletion and the easy maintenance of database is prone to row, and extensibility is good; The data input has availability deciding.
2, line configuring module
According to the structure of actual dc power-supply system, the line configuring module is divided into 4 parts: be followed successively by accumulator, feed panel, branch electric screen and monitoring and protection screen at present.Wherein, comprise accumulator and outlet protecting component, charging device and charge circuit switch and electric discharge device in the battery module; Feed panel comprises feed panel cable and feed panel protection switch; Divide electric screen to comprise branch electric screen cable and branch electric screen protection switch; Survey guarantor's screen and comprise that the screen cable is protected in survey, survey is protected screen protection and protected switch and load.
3, protection electrical equipment type selecting module
After line configuring finishes, load current should be set at first, then element in the straight-flow system be carried out the type selecting setting, mainly comprise protecting component type selecting and lead/cable type selecting.
4, module is checked in the analysis of protection electrical equipment
Each element selection rationality check is the major function of this software in the DC power system, mainly checks content and comprises lead/cable pressure drop check, protecting component sensitivity check, reaches the superior and the subordinate's protecting component selectivity check.
Lead/cable pressure drop is checked
For lead/cable pressure drawdown analysis mainly is owing in general straight-flow system, not too value for the selection of lead/cross-section of cable size, tends to cause pressure drop excessive because section selection is too small, does not meet the demands.Main the deciding of lead/cable pressure drop check according to DL/T 5044-2004 " power engineering straight-flow system designing technique rules ".
Protecting component sensitivity is checked
The rated current specification of protecting component should be selected according to actual dc system running current size, should excessive (not being prone to cause tripping), and should too small (not being prone to cause malfunction) yet.So-called sensitivity analysis refers to the check of single-stage protection unit level part, promptly analyzes the judgement that when breaking down electric current in straight-flow system protecting component whether can tripping.
If need to check the sensitivity of protecting component, at first to calculate short-circuit current size everywhere in the DC power system.After obtaining in the DC power system everywhere short-circuit current value, need to confirm to require the harshest position for protecting component sensitivity, i.e. the position that sensitivity is minimum is during actual analysis, promptly with here as checking the standard whether protecting component sensitivity meets the demands.If protecting component all can satisfy the sensitivity requirement under exacting terms, prove that then there is not the possibility of tripping in this protecting component.When analyzing protecting component sensitivity in this software, with the least significant end of lead/cable of connecting protecting component as criterion.This is because lead/cable least significant end short-circuit current is minimum, and the sensitivity of protecting component is minimum comparatively speaking, here for judging the harshest position of sensitivity.
After judging that the sensitivity position is confirmed, can judge that protecting component is divided into isolating switch and fuse two big classes to protecting component sensitivity, wherein isolating switch is divided into two types of two segment protects and three section protections.
The superior and the subordinate's protecting component selectivity analysis is checked
Can introduce cut-off current characteristics when checking the superior and the subordinate's protecting component selectivity in this software, judged result and actual conditions are more approaching like this.When carrying out the selectivity analysis; Also need find the harshest position of condition in the system to be used to judge whether selectivity meets the demands; The harshest position of the condition of this moment refers to the maximum position of short-circuit current, and this is because short-circuit current causes the misoperation of higher level's protecting component more greatly more easily.Therefore, when selectivity is judged, take off grade switch bottom conduct harsh conditions position the most, short-circuit current is maximum here.
5, output module as a result
Check analysis can be exported result of calculation after accomplishing, and output content mainly comprises wiring layout output and analysis report output.Wiring layout can be picture format, is used for intuitively showing the check situation of whole DC power system topology layout, element type selecting and differential cooperation; Analysis report is the Excel formatted file, the judge conclusion of recording element type selecting information and check, and the technician can be reference with these information, the design process of auxiliary direct current origin system.
In sum, the present invention also has following effect:
1, AC power and direct supply layering, shield wiring.Thereby the precision in the raising data transmission;
2, compact electric apparatus is concentrated and to be assemblied in casing, thereby conserve space, makes that wiring is more reasonable, neat appearance;
3, the data processing aspect adopts breadth First, depth-first, topological sorting scheduling algorithm, improves precision, the raising Millisecond conversion time controlled;
4, remote signalling aspect adopts CDT, 103 stipulations.Increased and other compatibility of apparatus of collection control center;
5, end current discriminating aspect increases the syllogic protective breaker, has improved the reliability of software and hardware.
What should explain at last is: the above is merely the preferred embodiments of the present invention; Be not limited to the present invention; Although the present invention has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. direct supply dynamic simulative emulation system; It is characterized in that; Comprise accumulator, charging cabinet, switch board, experiment cabinet, resistor box, feeder line cabinet, emergency lighting cabinet, communication power supply cabinet and AC power distribution cabinet/AC distribution panel; Said communication power supply cabinet, emergency lighting cabinet are connected electrically in AC distribution cashier's office in a shop, and said charging cabinet converts the alternating current of AC power distribution cabinet/AC distribution panel into direct current, and this direct current is saved in the accumulator; Said accumulator and charging cabinet are that experiment cabinet, feeder line cabinet provide direct supply through SS; Swept resistance in the said resistor box is regulated the size of current in the experiment cabinet circuit, and said switch board is controlled experiment cabinet through CS, and said feeder line cabinet is connected electrically on the accumulator.
2. direct supply dynamic simulative emulation according to claim 1 system is characterized in that said accumulator is two covers.
3. direct supply dynamic simulative emulation according to claim 1 and 2 system is characterized in that said experiment cabinet is isolating switch and fuse extreme difference compatibility test platform.
4. direct supply dynamic simulative emulation according to claim 3 system is characterized in that, said system is connected with the computing machine of control total system.
5. direct supply dynamic simulative emulation according to claim 3 system is characterized in that, is connected with the hyperchannel oscillograph in the circuit of said resistor box and experiment cabinet.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100583631A CN102590743B (en) | 2012-03-07 | 2012-03-07 | Dynamic analog simulation system of direct-current power supply |
| CN2012200831478U CN202486287U (en) | 2012-03-07 | 2012-03-07 | Direct-current (DC) power supply dynamic analog simulation system |
| PCT/CN2012/086786 WO2013131392A1 (en) | 2012-03-07 | 2012-12-17 | Dc power supply dynamic simulation system and dc power supply test system |
| CA2866400A CA2866400A1 (en) | 2012-03-07 | 2012-12-17 | Dc power dynamic analog simulation system and dc power test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100583631A CN102590743B (en) | 2012-03-07 | 2012-03-07 | Dynamic analog simulation system of direct-current power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102590743A true CN102590743A (en) | 2012-07-18 |
| CN102590743B CN102590743B (en) | 2013-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200831478U Expired - Lifetime CN202486287U (en) | 2012-03-07 | 2012-03-07 | Direct-current (DC) power supply dynamic analog simulation system |
| CN2012100583631A Expired - Fee Related CN102590743B (en) | 2012-03-07 | 2012-03-07 | Dynamic analog simulation system of direct-current power supply |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200831478U Expired - Lifetime CN202486287U (en) | 2012-03-07 | 2012-03-07 | Direct-current (DC) power supply dynamic analog simulation system |
Country Status (3)
| Country | Link |
|---|---|
| CN (2) | CN202486287U (en) |
| CA (1) | CA2866400A1 (en) |
| WO (1) | WO2013131392A1 (en) |
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| WO2013131392A1 (en) * | 2012-03-07 | 2013-09-12 | 甘肃省电力公司电力科学研究院 | Dc power supply dynamic simulation system and dc power supply test system |
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| CN202486287U (en) * | 2012-03-07 | 2012-10-10 | 甘肃电力科学研究院 | Direct-current (DC) power supply dynamic analog simulation system |
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- 2012-12-17 WO PCT/CN2012/086786 patent/WO2013131392A1/en active Application Filing
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013131392A1 (en) * | 2012-03-07 | 2013-09-12 | 甘肃省电力公司电力科学研究院 | Dc power supply dynamic simulation system and dc power supply test system |
| CN107947332A (en) * | 2017-09-13 | 2018-04-20 | 浙江时通电气制造有限公司 | A kind of vehicle moving direct current emergency power supply case |
| CN107947332B (en) * | 2017-09-13 | 2020-02-07 | 浙江时通电气制造有限公司 | Vehicle-mounted mobile direct-current emergency power box |
| CN112180247A (en) * | 2020-09-11 | 2021-01-05 | 上海二十冶建设有限公司 | Concentrated online test method for operating mechanisms of vacuum circuit breakers of high-voltage cabinets in line |
| CN112180247B (en) * | 2020-09-11 | 2022-09-16 | 上海二十冶建设有限公司 | Concentrated online test method for operating mechanisms of vacuum circuit breakers of high-voltage cabinets in line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102590743B (en) | 2013-11-20 |
| CN202486287U (en) | 2012-10-10 |
| WO2013131392A1 (en) | 2013-09-12 |
| CA2866400A1 (en) | 2013-09-12 |
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