CN201623529U - Automatic switching wide-area control system for wide-area backup power supply of power system - Google Patents
Automatic switching wide-area control system for wide-area backup power supply of power system Download PDFInfo
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- CN201623529U CN201623529U CN2009202372605U CN200920237260U CN201623529U CN 201623529 U CN201623529 U CN 201623529U CN 2009202372605 U CN2009202372605 U CN 2009202372605U CN 200920237260 U CN200920237260 U CN 200920237260U CN 201623529 U CN201623529 U CN 201623529U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/12—Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
Abstract
An automatic switching wide-area control system for the wide-area backup power supply of a power system is characterized in that a main station end comprises a data acquisition unit, a data processing unit and a data sending unit, wherein the data acquisition unit gathers wide-area state information of the power system and all switch information, the data processing unit offers the load feeder cutoff list of a transformer substation, and the sending unit sends out the load feeder cutoff list to a station end. The station end is equipped with a main control unit and comprises a receiving unit, a detecting unit, and a processing and executing unit, the receiving unit receives and stores the load feeder cutoff list of the current transformer substation, the detecting unit detects on line whether a common action condition is met or not, and the processing and executing unit firstly switches on a line switch on the side of the back up supply, then cuts off the load feeder required to be cut off, and finally sends out activated information to the main station. Remote control and remote communication can be achieved among the main station end and all station ends through the special communication network of the power system. The system can achieve the effect of wide-area control according to all state information of the power system, and the action process is reliable.
Description
Technical field
The utility model relates to a kind of automatic control technology of power system, is specifically related to a kind of control system for automatically switching wide areas of wide area backup power supply of electric power system.
Background technology
Along with electrical network constantly enlarges, it is difficult all the more that the blocking of area power grid short circuit current becomes, and in order to reduce the influence of electromagnetic looped network to electric network security, constituted under the situation of looped network at high one-level electrical network, the low one-level electrical network of area power grid will unlink and be the power supply of radial pattern subregion burst.But the reliability of the electrical network after unlinking obviously descends, and " stand-by power supply automatic switching device " for this reason (industrial stand-by power supply automatic switching or BZT of also usually abbreviating as) is widely applied as a kind of " microcomputer control equipment " in area power grid transformer station.The stand-by power supply automatic switching device is after a certain working power fault and other reason are disconnected, and can automatically stand-by power supply or other operate as normal power supply be devoted oneself to work a kind of automatics that the user that working power is disconnected is unlikely to have a power failure rapidly.
In order to describe the operation principle of traditional standby power supply automatic switching device in detail, Fig. 1 has provided a typical 110kV circuit stand-by power supply automatic switching schematic diagram.
The switching control mode of stand-by power supply automatic switching is as described below.
I circuit stand-by power supply automatic switching (mode 1)
At ordinary times, the operation of #1 inlet wire, the #2 inlet wire is standby, and promptly 1DL, 3DL are closing the position, and 2DL is in a minute position.
When the #1 incoming power hinders or after other reason was disconnected, #2 inlet wire stand-by power supply should be able to drop into automatically, and only allows action once for some reason.In order to meet this requirement, designed the stand-by power supply automatic switching control device that is similar to the circuit automatic reclosing, after charging is finished just control device only allows to haul oneself willingly into.
The control device charge condition:
A) mother I, the female all three-phases of II have pressure, and when the #2 line voltage distribution checked that control word drops into, the #2 circuit had pressure (Ux2),
B) 1DL, 3DL are closing the position, and 2DL is in a minute position.
Must satisfy above-mentioned two conditions simultaneously, after 15 seconds, charge and finish.
It also is discharging condition that control device is hauled oneself willingly into:
A) when the #2 line voltage distribution checked that control word drops into, the #2 circuit did not have pressure (Ux2),
B) 2DL closes,
C) hand is jumped 1DL or 3DL,
D) other outside block signal,
E) control word of adjusting does not allow the #2 service entrance switch to haul oneself willingly into.
Satisfy that any one gets final product in above-mentioned 5 conditions.
Course of action: after charging was finished, mother I, mother II did not all have pressure, and Ux2 has pressure, were equipped with to throw to open, and I1 does not have stream, and time-delay Tb1 tripping 1DL after the affirmation 1DL tripping, closes 2DL.
II circuit stand-by power supply automatic switching (mode 2)
Mode 2 processes are mode 1 roughly the same.
III bridge switch stand-by power supply automatic switching (mode 3, mode 4)
When two sections bus fanout operations, device selects bridge switch to haul oneself willingly into scheme.
Charge condition: a) mother I, the female all three-phases of II have pressure;
B) 1DL, 2DL are closing the position, and 3DL is in a minute position.
Must satisfy above-mentioned two conditions simultaneously, after 15 seconds, charge and finish.
Discharging condition: a) 3DL is closing the position;
B) mother I, the female all three-phases of II do not have pressure;
C) hand is jumped 1DL or 2DL;
D) other outside block signal is as power transformer interior fault etc.
Satisfy that any one gets final product in above-mentioned 4 conditions.
Course of action: after charging is finished
A) the female nothing pressure of mode 3:I, #1 inlet wire do not have stream, and mother II has pressure, and mode 3 is hauled oneself willingly into the control word of adjusting and allowed, and then after the Tb3 time-delay, jumps 1DL, close 3DL after the affirmation 1DL tripping.
B) the female nothing pressure of mode 4:II, #2 inlet wire do not have stream, and mother I has pressure, and mode 4 is hauled oneself willingly into the control word of adjusting and allowed, and then after the Tb4 time-delay, jumps 2DL, close 3DL after the affirmation 2DL tripping.
What provide on the current market all designs according to following 1 to 6 " control logic of local state information " with all stand-by power supply automatic switching devices that moving, and does not have the ability of the whole running statuses of whole electric power system being adjusted in real time response.
Existing stand-by power supply automatic switching control basic principle is:
1, have only after working power is disconnected really, stand-by power supply could be dropped into, and fault can not be excised by the stand-by power supply automatic switching.
When 2, causing that because of its protection tripping of the standby object fault of stand-by power supply automatic switching working power is excised in adjacent backup protection action, answer locking stand-by power supply automatic switching.
3, the time-delay of stand-by power supply automatic switching is in order to escape the busbar voltage decline that working power lead-out wire fault causes, so the time-delay time limit of stand-by power supply automatic switching should be greater than the longest external fault mute time.
4, by artificial excision working power, the stand-by power supply automatic switching should not move, and increases hand in case of necessity and jumps locking.
5, stand-by power supply does not satisfy press strip spare, and the stand-by power supply automatic switching should not move.
Therefore 6, the stand-by power supply automatic switching only should move once, wants equipment electricity consumption source automatic switching once to move locking or increase charge condition, generally is that discharge order at once is equipped with throwing and can't moves once more after the action.
Do not have based on the existing stand-by power supply automatic switching device of " local information " (industrial yet often be called: information) on the spot all state informations of whole electric power system are carried out the analyzing and processing ability, in order to further specify this problem, please control the problem of being brought referring to typical electric power system shown in Figure 2 and conventional stand-by power supply automatic switching thereof:
(1) existing stand-by power supply automatic switching strategy is not considered the fail safe of distant place stand-by power supply side apparatus, may cause power grid accident to spread.
Stand-by power supply automatic switching control strategy has only been considered local substation bus bar voltage or inlet wire current on the spot at present, and do not consider the capacity-load ratio of distant place stand-by power supply side main transformer, the thermally-stabilised limit of circuit etc., easily cause stand-by power supply side overload tripping operation, cause the further expansion of fault.
In Fig. 2, when circuit 1 fault withdraws from, the DL1 tripping, transformer station's 1 dead electricity, circuit stand-by power supply automatic switching moves and the DL2 that closes automatically, drops into extension wire 2, at this moment, transformer station's 1 load will all be transferred on the statements based on collusion circuit and 220kV main transformer T1 in a circuit 2 and a distant place basically; If this moment, the capacity-load ratio of T1 was very low, or the approaching thermally-stabilised limit of the branch power of statements based on collusion circuit, then the load of this part transfer will cause the action of relevant overload or overcurrent protection, finally cause the system failure to enlarge.Therefore, the state information with distant place stand-by power supply side transformer and statements based on collusion circuit is incorporated in the local stand-by power supply automatic switching strategy and seems extremely important.
(2) the existing stand-by power supply automatic switching strategy power supply that is subject to occupy a narrow space disturbs, and causes malfunction and tripping accident.
The fault detection of power loss signal of stand-by power supply automatic switching generally is a voltage and current at present, and the single meeting of detection signal causes the malfunction of stand-by power supply automatic switching and the generation of tripping phenomenon.For the voltage setting value Ding Detai low (as voltage be decided to be 30%) of some transformer station with dead electricity, when taking place as (1) described fault, after the DL2 tripping, 110kV2M since the supporting role of local unit can't fall too much, thereby cause the generation of stand-by power supply automatic switching tripping phenomenon; On the other hand, if voltage setting value Ding Detaigao (being decided to be 70%) as voltage, then local power supply idle exert oneself less, generation malfunction when local load or burden without work is heavier.
(3) existing stand-by power supply automatic switching strategy can't be realized and the safety control coordination, causes a large amount of stand-by power supply automatic switchings to have to stop using.
What the safety control of existing major network was relevant with local power network mainly is low frequency load shedding equipment.If the fixed automatic excision circuit of UFLS has circuit 2, then when circuit 2 be because during UFLS excision that the major network fault causes, existing stand-by power supply automatic switching can't be offered an explanation circuit 1 fault or the action of security control device, so can throw into circuit 1 side automatically; This will cause original major network security control measure to fall through, and directly threaten the major network safe operation.Also just because of this contradictory relation, if top 220kV transformer station is a stable system actuating station, 110kV transformer station will have to withdraw from the stand-by power supply automatic switching, cause a kind of waste of stand-by power supply automatic switching resource at present.In fact; if can in existing stand-by power supply automatic switching strategy, introduce the peace control signal and the guard signal of distant place 220kV transformer station; can offer an explanation line fault or stable system acting with simple logic; can recover the work of existing stand-by power supply automatic switching like this; directly improve the utilance of stand-by power supply automatic switching and the reliability of transformer station's power supply, finally realize the coordination of stand-by power supply automatic switching and security control device.Present actual conditions are, the stand-by power supply automatic switching device that China's area power grid has come into operation does not all possess distant place locking and wide area controlled function, according to the requirement of afore mentioned rules, the 110kV stand-by power supply automatic switching device relevant with stable system must be out of service.
The utility model content
Technical problem to be solved of the present utility model, a kind of control system for automatically switching wide areas of wide area backup power supply of electric power system just is provided, consider the fail safe of a distant place stand-by power supply side apparatus during its control stand-by power supply automatic switching, can avoid power grid accident to spread, and the power supply that is not subject to occupy a narrow space disturbs, and can not cause malfunction and tripping accident, and is last, can also realize and the safety control coordination, directly improve the utilance of stand-by power supply automatic switching and the reliability of transformer station's power supply.
Realize above-mentioned purpose, the technical scheme that the utility model is taked is:
A kind of control system for automatically switching wide areas of wide area backup power supply of electric power system, it is characterized in that comprising: the stand-by power supply automatic switching device of wide area stand-by power supply automatic switching computerized information and controlling platform (main website end) and a plurality of bottoms (factory's station end) constitutes, the main website end is stood with each factory and is communicated by letter with a distant place by electric power system private wore network network realization distant place control between the end, constitutes the electric power system layered distribution type wide-area control system of a high and low layer structure.
Described main website end is circumscribed with human-computer interaction interface, and described factory's station end (each transformer station) is provided with main control unit.
Described main website end contains data acquisition unit, data processing unit and data transmission unit, data acquisition unit is gathered electrical power system wide-area state information and switching information (all information that comprised the electrical network actual motion, the for example state of electrical network and switch data, electric current, the size of voltage, the state of switch etc., each substation connects load, the circuit through-put power, voltage, current parameters, switching information or the like) and pass to data processing unit, the electrical power system wide-area state information of the importance degree of transformer station's load and continuous real-time update in the data processing unit database, switching information adopts wide area stand-by power supply automatic switching control decision method to provide current all transformer station's load feeder connection that the stand-by power supply automatic switching is installed and cuts tabulation and pass to data transmission unit; The load feeder connection that the stand-by power supply automatic switching device that data transmission unit is regularly held to the factory station issues is at that time cut tabulation.
Described factory station end is provided with main control unit, it comprises receiving element, detecting unit, the processing execution unit, receiving element receives and storage is cut tabulation by the current load feeder connection in this station that the main website end sends, whether the online detection stand-by power supply of detecting unit automatic switching satisfies conventional operation condition, the processing execution unit satisfies under the conventional operation condition receiving this stand-by power supply automatic switching device that detecting unit sends, the line switching of stand-by power supply side closes earlier, cut away load feeder connection according to the current distant place control command of stand-by power supply automatic switching then and cut the load feeder that requires excision in the tabulation, then and send the information of " moving " to the main website end.
Beneficial effect: on December 9th, 2008 is in Zhaoqing power supply administration of CHINA SOUTHERN POWER Guangdong Power Grid company, South China Science ﹠ Engineering University, Holley's science and technology, Tsing-Hua University, under the personnel's of relevant departments that the Nanjing electricity grinds the positive cooperation, " control system for automatically switching wide areas of wide area backup power supply of electric power system " that is proposed in the utility model application carried out a series of on-the-spot test test, obtained good Expected Results.
Concrete test experiments is summarized as follows: test process is divided into three phases, and first: do not have the operation of power networks risk situation after being set at the action of stand-by power supply automatic switching device, promptly do not have the out-of-limit ruuning situation of equipment; Second: only need join the situation of cutting one 10 kilovolt after being set at the action of stand-by power supply automatic switching device; The the 3rd: be set at the situation that needs connection to cut two 10 kilovolt switches after the backup auto-activating device action.Test event is as follows:
The main website end:
(1) control system result of calculation correctness;
(2) cut 10 kilovolt switches (in the phase I not this step) for connection in the control strategy table;
(3) distant place is thrown and is moved back stand-by power supply automatic switching device function (phase I is " distant place ", and second stage is " on the spot ");
(4) dispatching terminal interface display correctness;
Actuating station:
(1) correctly receives control command;
(2) on-the-spot backup auto-activating device sequence of movement is for moving earlier in 110 kilovolt switches, and connection is cut two 10 kilovolt switches again;
(3) actuating signal correctness;
(4) carry out distant place throwing and move back the order correctness.
All test results have all reached desirable Expected Results, test result shows that " control system for automatically switching wide areas of wide area backup power supply of electric power system " that proposed in the utility model application can reach basis " all POWER SYSTEM STATE information " thereby the effect of realization " wide area control ", and course of action is reliable.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the circuit stand-by power supply automatic switching associated diagram that the 110kV transformer station of prior art uses;
Fig. 2 is the 110kV transformer station stand-by power supply automatic switching device wiring schematic diagram that contains the power supply that occupies a narrow space;
Fig. 3 is the hardware basic framework figure of wide area stand-by power supply automatic switching control system;
Fig. 4 is the control flow chart of wide area stand-by power supply automatic switching control system;
Fig. 5 is the software architecture diagram of wide area stand-by power supply automatic switching control system main website end;
Fig. 6 is the logical schematic of wide area stand-by power supply automatic switching device.
Embodiment
As depicted in figs. 1 and 2, the stand-by power supply automatic switching device principle of prior art is applied in the circuit that 110kV transformer station uses, and these two inlet wires of 1# and 2# pass through 1DL among the figure, 2DL, and 3DL carries out the switching of electric power incoming line.
Fig. 2 is the 110kV transformer station stand-by power supply automatic switching device wiring schematic diagram (typical statements based on collusion mode) that contains the power supply that occupies a narrow space, this figure be the normal electricity system from voltage levels to low-voltage grade power grids schematic diagram, comprising main power source side and stand-by power supply side, each transformer station has certain power load, the power supply that occupies a narrow space is surfed the Net by main transformer, wherein P
GAnd Q
GMeritorious and idle exerting oneself for the power supply that occupies a narrow space.
Figure 3 shows that the composition basic framework figure of wide area stand-by power supply automatic switching control system of the present utility model, as can be seen from FIG., wide area stand-by power supply automatic switching control system of the present utility model comprises:
The stand-by power supply automatic switching device of wide area stand-by power supply automatic switching computerized information and controlling platform (main website end) 1 and a plurality of bottoms (factory's station end) 2 constitutes, constitute the electric power system layered distribution type wide-area control system of a high and low layer structure, main website end 1 is circumscribed with human-computer interaction interface 4, and main website end 1 is stood with each factory and communicated by letter with a distant place by electric power system private wore network network 3 (the wide area prepared auto restart communication protocol of transforming on the IEC60870-5-101 stipulations) realization distant place control between the end 2.
Control flow chart referring to the wide area stand-by power supply automatic switching control system of Fig. 4, main website end 1 contains data acquisition unit 11, data processing unit 12 and data transmission unit 13, data acquisition unit 11 is gathered electrical power system wide-area state information and switching information (all information that comprised the electrical network actual motion, the for example state of electrical network and switch data, electric current, the size of voltage, the state of switch etc., each substation connects load, the circuit through-put power, voltage, current parameters, switching information or the like), data processing unit 12 is according to the importance degree of transformer station's load in the database, and electrical power system wide-area state information and switching information, provide current all transformer station specific electric load feeder line connection that the stand-by power supply automatic switching is installed and cut tabulation; The stand-by power supply automatic switching device that data transmission unit 13 is regularly held to the factory station issues the load feeder connection and cuts tabulation.
Factory's station end 2 is provided with main control unit, it comprises receiving element 21, detecting unit 22, processing execution unit 23, receiving element 21 regularly receives and storage is cut tabulation by the current load feeder connection in this station that main website end 1 sends, whether detecting unit 22 online detection stand-by power supply automatic switchings satisfy conventional operation condition, if do not satisfy operation condition, then return the distant place control command that continues to receive and store the main website end; If satisfy operation condition, then processing execution unit 23 is according to the current distant place control command of stand-by power supply automatic switching, the line switching of stand-by power supply side that closes earlier cuts away the load feeder connection then and cuts the load feeder that requires excision in the tabulation, and is last and send the information of " moving " to main website.
In this explanation a bit, because electrical power system wide-area state information and switching information are dynamic changes, so above-mentioned control flow also is dynamic.
Fig. 5 is the software architecture diagram of wide area stand-by power supply automatic switching control system main website end, because the stand-by power supply automatic switching device is under the jurisdiction of numerous electric power system dispatching of power netwoks control system, therefore " wide area stand-by power supply automatic switching control system " software systems of being developed generally can be embedded in the dispatching of power netwoks computer control system software.
Part among Fig. 5 in the empty frame 501 is exactly that the utility model proposes " wide area stand-by power supply automatic switching control decision method ", it generates " Power system state estimation program " according to the state and the switch data of electrical network, form tidal current analysis border design conditions and autoexec, carry out the application that trend is calculated, system at first checks whether satisfy static security verification safety, if verification is defective then according to " 10% diminishing method " search method, reduce the load value (transferable load value) of stand-by power supply automatic switching device place substation bus bar, qualified until safety check, preserving qualified transferable load value is the control permission definite value of this prepared auto restart, finish the stand-by power supply automatic switching and control definite value and slip condition database in real time, issue corresponding load feeder connection to each stand-by power supply automatic switching device of a distant place at last and cut tabulation.
And " Power system state estimation program " is the advanced applied software of the standard configuration in the modern power systems dispatching of power netwoks control system.
Fig. 6 is the logical schematic of wide area stand-by power supply automatic switching device, comprises two parts among the figure, and the conventional logic of the conventional stand-by power supply automatic switching device of the first has independent starting section, and charge protection carries out switching mode; Another part is that the utility model newly adds part, cut tabulation by a distant place load feeder connection of accepting to send by the main website end, whether online detection stand-by power supply automatic switching device satisfies conventional operation condition, if do not satisfy operation condition, then return the distant place control command that continues to receive and store the main website end, if satisfy operation condition, then earlier according to the current distant place control command of stand-by power supply automatic switching device, the line switching of stand-by power supply side closes earlier, cut away in the tabulation load feeder that requires excision then, then and send the information of " moving " to main website.After the action of stand-by power supply automatic switching device, cut strategy from main website termination receipts " wide area stand-by power supply automatic switching our station load feeder connection is cut the tabulation definite value " as connection according to device is the last, finish the load connection with " throw afterwards earlier and cut " pattern and cut course of action, install during this time sent out the time-delay order by the cutting load circuit, be generally 200ms.And move back function by throwing of soft pressing plate implement device at the remote control of master station; Realize that by hard pressing plate " distant place, on the spot " switch.
Factory's end stand-by power supply automatic switching device should possess two kinds of functions: (1) basic function, the repertoire of " control on the spot " of promptly former traditional standby power supply automatic switching device; (2) receive " distant place control " function that main website end wide area is controlled.
Foreign current and voltage are imported behind the isolation transformer isolated variable, input to A-D converter through low pass filter, and handle numeral CPU sampling back, constitutes various protection relays, and calculate various remote measurement amounts.
UA1, UB1, UC1 are the female voltage of I, angle knot input; UA2, UB2, UC2 are the female voltage of II, angle knot input.
UJx1, UJx2 are the voltage between phases input of two inlet wire circuit PT.
IJX1, IJX2 are two inlet wires, one phase currents, device mistake starting when being used to prevent the PT broken string.
IAC, IBC, ICC are special measurement CT input.
Device is introduced two sections busbar voltages (Uab1, Ubc1, Uca1, Uab2, Ubc2, Uca2), is used to that pressure is arranged, does not have to press and differentiate.Introduce two sections primary voltages (Ux1, Ux2) as hauling oneself willingly into the assistant criteria of preparing and moving, can select whether use through control word.Each service entrance switch is respectively introduced a phase current (I1, I2), is to cause the bridge switch miscarrying behind the PT three-phase broken string in order to prevent, and also be in order better to confirm service entrance switch tripping.
Device is introduced 1DL, 2DL, 3DL position of the switch contact (TWJ), differentiates as system operation mode, hauls oneself willingly into and prepares and select to haul oneself willingly into mode.That has introduced 1DL, 2DL, 3DL switch closes back position signalling (attracting from the switching manipulation loop), as the locking of hauling oneself willingly under the various ruuning situations.Also introduced closedown mode 1 in addition respectively and hauled oneself willingly into, closedown mode 2 is hauled oneself willingly into, and closedown mode 3,4 is hauled oneself willingly into three inputs.
The device output contact has 1DL, the 2DL of jumping, and 3DL closes 1DL, 2DL, each one pair of contact of 3DL, and one group of remote control is jumped and closed output.Signal output is respectively: device locking (can monitor the direct current dead electricity, normally closed contact), device is reported to the police, each one pair of contact of protection action.
Device also has 32 road load connection to cut output contact, is used for stand-by power supply automatic switching action back cutting load.
1) circuit stand-by power supply automatic switching (mode 1)
The operation of #1 inlet wire, the #2 inlet wire is standby, and promptly 1DL, 3DL are closing the position, and 2DL is in a minute position.When the #1 incoming power hinders or after other reason was disconnected, #2 inlet wire stand-by power supply should be able to drop into automatically, and only allows action once for some reason.In order to meet this requirement, designed the charging process that is similar to the circuit automatic reclosing, just only after charging is finished, allow to haul oneself willingly into.
Charge condition: a) mother I, the female all three-phases of II have pressure, and when the #2 line voltage distribution checked that control word drops into, the #2 circuit had pressure (Ux2)
B) 1DL, 3DL are closing the position, and 2DL is in a minute position
After 15 seconds, charge and finish.
Discharging condition: a) when the #2 line voltage distribution checked that control word drops into, the #2 circuit did not have pressure (Ux2)
B) 2DL closes
C) hand is jumped 1DL or 3DL
D) other outside block signal
E) control word of adjusting does not allow the #2 service entrance switch to haul oneself willingly into
Course of action: after charging was finished, mother I, mother II did not all have pressure, and Ux2 has pressure, and I1 does not have stream, and time-delay Tb1 tripping 1DL after the affirmation 1DL tripping, closes 2DL.
2) circuit stand-by power supply automatic switching (mode 2)
Mode 2 processes are with mode 1.The operation of #2 circuit, the 1# circuit is standby.
Charge condition: a) mother I, the female all three-phases of II have pressure, and when the #1 line voltage distribution checked that control word drops into, the #1 circuit had pressure (Ux1);
B) 2DL, 3DL are closing the position, and 1DL is in a minute position.
After 15 seconds, charge and finish.
Discharging condition: a) when the #1 line voltage distribution checked that control word drops into, the #1 circuit did not have pressure (Ux1);
B) 1DL closes;
C) hand is jumped 2DL or 3DL;
D) other outside block signal;
E) control word of adjusting does not allow the #1 service entrance switch to haul oneself willingly into.
Course of action: after charging was finished, mother I, mother II did not all have pressure, and Ux1 has pressure, and I2 does not have stream, and time-delay Tb2 tripping 2DL after the affirmation 2DL tripping, closes 1DL.
3) bridge switch stand-by power supply automatic switching (mode 3, mode 4)
When two sections bus fanout operations, device selects bridge switch to haul oneself willingly into scheme.
Charge condition: a) mother I, the female all three-phases of II have pressure;
B) 1DL, 2DL are closing the position, and 3DL is in a minute position.
After 15 seconds, charge and finish.
Discharging condition: a) 3DL is closing the position;
B) mother I, the female all three-phases of II do not have pressure;
C) hand is jumped 1DL or 2DL;
D) other outside block signal is as power transformer interior fault etc.
Course of action: after charging is finished
A) the female nothing pressure of mode 3:I, #1 inlet wire do not have stream, and mother II has pressure, and mode 3 is hauled oneself willingly into the control word of adjusting and allowed, and then after the Tb3 time-delay, jumps 1DL, close 3DL after the affirmation 1DL tripping.
B) the female nothing pressure of mode 4:II, #2 inlet wire do not have stream, and mother I has pressure, and mode 4 is hauled oneself willingly into the control word of adjusting and allowed, and then after the Tb4 time-delay, jumps 2DL, close 3DL after the affirmation 2DL tripping.
4) female connection charge protection
One section three-phase overcurrent protection is set device specially and one section zero sequence overcurrent protection is used for the bus charge protection, at bus connection switch
The 500ms that closes is interior to be dropped into automatically, and female connection charge protection can move back with the pressing plate throwing.
5) the load connection is cut protection (function that increases newly in the utility model application)
After the action of device stand-by power supply automatic switching, cut strategy from main website termination receipts " wide area stand-by power supply automatic switching our station load connection is cut the tabulation definite value " as connection according to device is the last, finish the load connection with " throw afterwards earlier and cut " pattern and cut course of action, idiographic flow is as follows: wide area stand-by power supply automatic switching computerized information and controlling platform comprise: the data acquisition of (1) " to electrical power system wide-area state information and switching information "; (2) carry out the online in real time control decision; (3) and according to the importance degree of transformer station load in the database, provide current all transformer station's load feeder connection that the stand-by power supply automatic switching is installed and cut tabulation; (4) the last stand-by power supply automatic switching device of regularly holding to each factory station, a distant place issues the load feeder connection and cuts tabulation.The stand-by power supply automatic switching device of bottom comprises that (1) regularly receives and storage is cut tabulation by the distant place load feeder connection that the main website end sends; (2) whether online detection prepared auto restart satisfies conventional operation condition; (3), then return the distant place control command that continues to receive and store the main website end if do not satisfy operation condition; (4) if satisfy operation condition, then earlier according to the current distant place control command of prepared auto restart, the line switching of stand-by power supply side that closes earlier cuts away the load feeder that requires excision in the tabulation then, then and send the information of " moving " to main website.Install during this time being sent out the 200ms trip signal by the cutting load circuit.The load connection of device is cut the visible Fig. 6 of protection action logic figure.
6) PT broken string
The female PT broken string of I is differentiated:
When a) positive sequence voltage was less than 30V, I1 was closing an I2 greater than 0.06In greater than 0.06In or 1DL at jumping position, 3DL;
B) negative sequence voltage is greater than 8V.
The female PT broken string of I was reported in arbitrary condition time-delay in 2.5 seconds more than satisfying, and broken string disappearance back time-delay was returned in 10 seconds.
Female PT broken string criterion of II and mother I are roughly the same.
The circuit PT differentiation of breaking: the control word of adjusting requires to check line voltage distribution, if line voltage distribution Ux1 (Ux2) less than 0.3Un (Un=100V) and I1 (I2) greater than 0.06In, report #1 (#2) circuit PT broken string through 2.5 seconds, delay time and returned in 10 seconds in the broken string back that disappears.
7) device alarm
When CPU detects own hardware fault, a whole set of protection of issue device alarm signal locking simultaneously.Hardware fault comprises: FLASHROM, RAM, definite value is made mistakes.
When CPU detects following fault, send operation exception and report to the police:
A) switch has electric current (I1, I2, IA or IB or IC) and corresponding TWJ (1DL, 2DL, 3DL) is " 1 ", and is unusual through 10 seconds corresponding TWJ of time-delay newspaper, and the locking automatic closing;
B) mother I, the female PT broken string of II, circuit PT broken string.
8) remote signalling function
The remote signalling amount mainly contains: 4 tunnel remote signalling are opened into, displacement remote signalling and accident remote signalling, and make sequence of events recording, and remote signalling resolution is less than 2ms.
9) to the time function
When device possesses the network software school and hardware pulse to the time function.
10) a stand-by power supply automatic switching device distant place is thrown and is moved back function (function that increases newly in the utility model application)
Device is set up the remote control throwing at master station of " a stand-by power supply automatic switching distant place is thrown and moved back " soft pressing plate implement device and is moved back function.
11) stand-by power supply automatic switching " distant place, on the spot " switches (function that increases newly in the utility model application)
Device is set up " a stand-by power supply automatic switching distant place, on the spot " and is switched hard pressing plate, and the pressing plate input represents that the stand-by power supply automatic switching device adopts distant place function, withdraws from indication device and adopts function on the spot.When adopting on the spot function, device is not accepted " master station wide area load connection is cut the tabulation definite value " and the unloading device order is thrown in a distant place.
Claims (2)
1. control system for automatically switching wide areas of wide area backup power supply of electric power system, it is characterized in that: comprise wide area stand-by power supply automatic switching computerized information and controlling platform (1), and the stand-by power supply automatic switching device (2) of a plurality of bottoms, realize that by electric power system private wore network network (3) distant place control communicates by letter with a distant place between wide area stand-by power supply automatic switching computerized information and controlling platform (1) and each stand-by power supply automatic switching device (2), constitute the electric power system layered distribution type wide-area control system of a high and low layer of structure; Described wide area stand-by power supply automatic switching computerized information and controlling platform (1) contain data acquisition unit (11), data processing unit (12) and data transmission unit (13), data acquisition unit (11) is gathered electrical power system wide-area state information and switching information, data processing unit (12) is according to the importance degree of transformer station load in electrical power system wide-area state and switching information and the database, adopts wide area stand-by power supply automatic switching control decision method to provide current all transformer station's load feeder connection that stand-by power supply automatic switching device (2) is installed and cuts tabulation; Data transmission unit (13) regularly issues the load feeder connection to each stand-by power supply automatic switching device (2) and cuts tabulation.
2. control system for automatically switching wide areas of wide area backup power supply of electric power system according to claim 1, it is characterized in that: described stand-by power supply automatic switching device (2) is provided with main control unit, it comprises receiving element (21), detecting unit (22), processing execution unit (23), receiving element (21) receives by electric power system private wore network network (3) and storage is cut tabulation by the current load feeder connection of this stand-by power supply automatic switching device (2) that wide area stand-by power supply automatic switching computerized information and controlling platform (1) send, whether detecting unit (22) online this stand-by power supply of detection automatic switching device (2) satisfies conventional operation condition, processing execution unit (23) satisfies the line switching of this stand-by power supply automatic switching device (2) mains side that closes earlier under the situation of conventional operation condition receiving this stand-by power supply automatic switching device (2) that detecting unit (22) sends, again according to the current distant place control command of this stand-by power supply automatic switching device (2), cut away the load feeder connection then and cut the load feeder that requires excision in the tabulation, and send the information of having moved to wide area stand-by power supply automatic switching computerized information and controlling platform (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202372605U CN201623529U (en) | 2009-10-14 | 2009-10-14 | Automatic switching wide-area control system for wide-area backup power supply of power system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202372605U CN201623529U (en) | 2009-10-14 | 2009-10-14 | Automatic switching wide-area control system for wide-area backup power supply of power system |
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| CN201623529U true CN201623529U (en) | 2010-11-03 |
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| CN2009202372605U Expired - Lifetime CN201623529U (en) | 2009-10-14 | 2009-10-14 | Automatic switching wide-area control system for wide-area backup power supply of power system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522815A (en) * | 2012-01-09 | 2012-06-27 | 云南电力试验研究院（集团）有限公司电力研究院 | Automatic switching method of intelligent inter-station remote backup power supply |
| CN101714777B (en) * | 2009-10-14 | 2013-01-23 | 广东电网公司肇庆供电局 | Control system for automatically switching wide areas of wide area backup power supply of electric power system |
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| RU2745155C1 (en) * | 2020-09-23 | 2021-03-22 | Федеральное государственное бюджетное научное учреждение "Федеральный научный агроинженерный центр ВИМ" (ФГБНУ ФНАЦ ВИМ) | Multi-contact switching system with independent control of two power contact groups with redundant power circuits |
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- 2009-10-14 CN CN2009202372605U patent/CN201623529U/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101714777B (en) * | 2009-10-14 | 2013-01-23 | 广东电网公司肇庆供电局 | Control system for automatically switching wide areas of wide area backup power supply of electric power system |
| CN102522815A (en) * | 2012-01-09 | 2012-06-27 | 云南电力试验研究院（集团）有限公司电力研究院 | Automatic switching method of intelligent inter-station remote backup power supply |
| CN103595030A (en) * | 2013-11-28 | 2014-02-19 | 山东迅风电子有限公司 | Method for distribution network automation feeder terminal protection control based on current criterions |
| CN103595030B (en) * | 2013-11-28 | 2016-01-20 | 山东迅风电子有限公司 | Based on the distribution network automation feeder terminal protecting control method of electric current criterion |
| CN110571808A (en) * | 2019-10-25 | 2019-12-13 | 广东电网有限责任公司 | Remote spare power automatic switching line association setting verification method and spare power automatic switching device |
| CN110571808B (en) * | 2019-10-25 | 2021-09-14 | 广东电网有限责任公司 | Remote spare power automatic switching line association setting verification method and spare power automatic switching device |
| CN111564900A (en) * | 2020-04-14 | 2020-08-21 | 云南电网有限责任公司 | Stability control system comprising multiple direct current coordinated control main stations and regional stability control substations |
| CN111564900B (en) * | 2020-04-14 | 2023-09-22 | 云南电网有限责任公司 | Stability control system comprising multiple direct current coordination control master stations and regional stability control substations |
| RU2745155C1 (en) * | 2020-09-23 | 2021-03-22 | Федеральное государственное бюджетное научное учреждение "Федеральный научный агроинженерный центр ВИМ" (ФГБНУ ФНАЦ ВИМ) | Multi-contact switching system with independent control of two power contact groups with redundant power circuits |
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