CN103746304B - The remodeling method of Intelligent transformer station - Google Patents

The remodeling method of Intelligent transformer station Download PDF

Info

Publication number
CN103746304B
CN103746304B CN201310726673.0A CN201310726673A CN103746304B CN 103746304 B CN103746304 B CN 103746304B CN 201310726673 A CN201310726673 A CN 201310726673A CN 103746304 B CN103746304 B CN 103746304B
Authority
CN
China
Prior art keywords
differential protection
bus differential
main frame
digitlization
handset
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201310726673.0A
Other languages
Chinese (zh)
Other versions
CN103746304A (en
Inventor
张广嘉
陈远生
朱慧文
侯亮
冯亮
李荣昌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CYG Sunri Co Ltd
Original Assignee
CYG Sunri Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CYG Sunri Co Ltd filed Critical CYG Sunri Co Ltd
Priority to CN201310726673.0A priority Critical patent/CN103746304B/en
Publication of CN103746304A publication Critical patent/CN103746304A/en
Application granted granted Critical
Publication of CN103746304B publication Critical patent/CN103746304B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention discloses a kind of remodeling method of Intelligent transformer station, during the technical problem that solve is Intelligent transformer station transformation, bus does not lose protection operation.Method of the present invention; comprise the following steps: the transfer of the secondary cable at traditional transformer station bus differential protection each interval is connected to digitlization bus differential protection handset; interval merge cells and intelligent terminal are electrically connected with transforming plant primary equipment by cable; the messaging parameter of amendment digitlization bus differential protection main frame is arranged, and removes handset.The present invention compared with prior art; the digitlization bus differential protection main frame of Intelligent transformer station and digitlization bus differential protection handset is adopted to share in the process of transformation; transformation process does not affect the protection operational mode and sharing of load that transformer station stands entirely; the interruption duration of equipment during decreasing transformation, only needed to have a power failure once by the primary equipment transformed, bus differential protection is shorter for disengaging time; operation of power networks reliability is high; reduce difficulty of construction, increase work efficiency, invest less.

Description

The remodeling method of Intelligent transformer station
Technical field
The present invention relates to a kind of building method of Intelligent transformer station, particularly a kind of method adopting digitlization bus differential protection to transform Intelligent transformer station.
Background technology
The further genralrlization built along with Intelligent transformer station and the extensive use of digital protection, the engineer applied of digital protection in Intelligent transformer station construction and transformation is one of emphasis of intelligent substation construction.The importance of digitlization bus protection and protection range and application conditions and particularity, occupy extremely important status in the engineer applied of Intelligent transformer station.Because Intelligent transformer station adopts Optical Fiber Transmission digital information; greatly reduce transformer station's inner cable wiring workload; shorten installation, debugging Intelligent transformer station cycle; and protective relaying device and secondary circuit on-line monitoring can be realized, provide robust techniques guarantee for carrying out relaying protection repair based on condition of component.Traditional Transfomer Substation Reconstruction is the method for intelligent substation by prior art; because all intervals of bus once can not complete transformation; during transformation, bus differential protection device can not collect complete bus information, need to suspend the protection to bus, and this brings potential safety hazard to power supply.
Summary of the invention
The object of this invention is to provide a kind of remodeling method of Intelligent transformer station, during the technical problem that solve is Intelligent transformer station transformation, bus does not lose protection operation.
The present invention is by the following technical solutions: a kind of remodeling method of Intelligent transformer station, comprises the following steps:
One, information gathering is transmitted and is switched, by the traditional transformer station transformed, a digitlization bus differential protection main frame is set, by every platform digitlization bus differential protection handset access 1-12 interval, the transfer of the secondary cable at traditional transformer station bus differential protection each interval is connected to digitlization bus differential protection handset, digitlization bus differential protection handset receives the intake at the interval be connected to, by every cycle 80 point, the interval of access is carried out to the of ac sampling of electric current and voltage, of ac is converted to digital quantity, by optical fiber, intake, digital quantity is transferred to digitlization bus differential protection main frame;
Two, after digitlization bus differential protection main frame receives intake that digitlization bus differential protection handset sends, digital quantity, judge the operational mode of bus according to the intake at each interval, digital quantity is processed by bus protection criterion, realize the real-time guard to bus;
Three, the primary equipment at interval is had a power failure, respectively interval merge cells and intelligent terminal are electrically connected by the transforming plant primary equipment at cable and this interval, then by merge cells and intelligent terminal and digitlization bus differential protection main frame by Fiber connection, drop into primary equipment;
Four, to the interval completing intellectualized reconstruction, the messaging parameter of amendment digitlization bus differential protection main frame is arranged, the interval intake of collection and of ac being sent by digitlization bus differential protection handset being sent be switched on merge cells and intelligent terminal, realizing the switching of transformation interval Information Monitoring;
Five, the digitlization bus differential protection main frame access spaced merge cells of institute and intelligent terminal, all remove handset, complete the transformation of Intelligent transformer station.
What in the step one of the inventive method, digitlization bus differential protection handset reception digitlization bus differential protection main frame sent outputs information; digitlization bus differential protection main frame sends protection act signal, realizes a switch trip by the relay of outputing of digitlization bus differential protection handset.
The digitlization bus differential protection handset of the inventive method receives the GOOSE tripping operation message of digitlization bus differential protection main frame transmission and carries out packet parsing according to the form that IEC61850 standard specifies; obtain digitlization bus differential protection main frame current send action command; when in GOOSE message to when should have an interval set tripping operation outlet order; outlet order is sent out, controls corresponding exit relay outlet tripping operation.
Bus differential protection operation information is sent to the Automatic monitoring systems being positioned at main control room by the step 2 digitlization bus differential protection main frame of the inventive method, realizes the remote monitoring of substation operation personnel to bus differential protection; Described digitlization bus differential protection main frame stores bus differential protection operation information; Described bus differential protection operation information is the communication work information of intake, digital quantity, main frame and the handset that main frame receives handset and sends.
After the step 3 input primary equipment of the inventive method; merge cells and intelligent terminal deliver to digitlization bus differential protection main frame by the digital quantity of the electric current of collection and the of ac of voltage, intake; during transformation connection merge cells and intelligent terminal are carried out in each interval; digitlization bus differential protection main frame still receives by the intake at transformation interval, the digital quantity of of ac that gathers by 80, every cycle through digitlization bus differential protection handset, is combined digital quantity, the intake of unit and intelligent terminal being delivered to main frame and does not process.
Before the messaging parameter of the step 4 amendment digitlization bus differential protection main frame of the inventive method is arranged, test, method of testing is:
The synchronism of digitlization bus differential protection handset and merge cells is tested, merge cells and digitlization bus differential protection handset send the digital quantity by every cycle 80 of acs gathered to digitlization bus differential protection main frame at equal intervals, and digitlization bus differential protection main frame adopts interpolation synchronous method to process;
To bus differential protection configuration testing, adopt analog quantity tester simulated intelligence terminal, merge cells, digitlization bus differential protection handset or before transformation by digitlization bus differential protection main frame and intelligent terminal, merge cells, digitlization bus differential protection handset simulated field is got up by Fiber connection, and install to intelligent terminal by under configuration file, merge cells, digitlization bus differential protection handset, check intelligent terminal, merge cells, whether normally communicate between digitlization bus differential protection handset with digitlization bus differential protection main frame, simulation adds intake to digitlization bus differential protection main frame, of ac, check whether digitlization bus differential protection main frame correctly can receive message, alarm, after action, to be tripped information, warning information correctly sends.
The interval intelligent terminal that the step 4 of the inventive method completes transformation send intake in real time, and merge cells carries out the of ac sampling of electric current and voltage by 80, every cycle to interval and analog-to-digital conversion send digitlization bus differential protection main frame.
The digitlization bus differential protection handset of the inventive method gathers the of ac of multi-compartment electric current and voltage; the AC sampling data obtained after analog-to-digital conversion conversion; AC sampling data are combined; time synchronized is carried out by the AC sampling data of difference sampling algorithm to different interval; IEC61850-9-2 stipulations packing framing is pressed again by merging each interval AC sampling data synchronously; convert light signal to, by optical fiber line, the message comprising AC sampling value information is sent to digitlization bus differential protection main frame.
The digitlization bus differential protection handset of the inventive method gathers multi-compartment and opens into signal; convert digital information to; after the intake chosen is packed by the GOOSE message form specified according to IEC61850 standard; convert light signal to, by optical fiber line, the message comprising intake data is sent to digitlization bus differential protection main frame.
The step one of the inventive method, for the configuration of dual tradition bus differential protection, a set of traditional bus differential protection configuration puts into operation all the time, by out of service for another set of traditional bus differential protection configuration, the of ac in each loop, interval, the terminal order of input and output amount cable connection before the traditional bus differential protection configuration exited are accessed digitlization bus differential protection handset;
For the configuration of substanceization tradition bus differential protection outdoor breaker, instrument transformer secondary side have access needed for bus differential protection of ac, input and output amount spare contact, by cable, spare contact is accessed digitlization bus differential protection handset, do not exit existing traditional bus differential protection;
The of ac accessed needed for the configuration of tradition bus differential protection, input and output amount are without contact for subsequent use; exit conventional busbars protection, institute before the traditional bus differential protection device exited is connect the of ac in each loop, interval, the terminal of input and output amount cable connection sequentially accesses handset.
The present invention compared with prior art, the digitlization bus differential protection main frame of Intelligent transformer station and digitlization bus differential protection handset is adopted to share in the process of transformation, transformation process does not affect the protection operational mode and sharing of load that transformer station stands entirely, the interruption duration of equipment during decreasing transformation, only needed to have a power failure once by the primary equipment transformed, bus differential protection is shorter for disengaging time, operation of power networks reliability is high, reduce difficulty of construction, increase work efficiency, invest less, only need to increase digitlization bus differential protection handset, digitlization bus differential protection handset can repeated multiple timesly use.
Accompanying drawing explanation
Fig. 1 is digitlization bus differential protection main frame and the digitlization bus differential protection handset winding diagram of the embodiment of the present invention.
Fig. 2 is the digitlization bus differential protection main frame connection layout in embodiment of the present invention transformation process.
Fig. 3 is the digitlization bus differential protection main frame connection layout after the embodiment of the present invention has been transformed.
Schematic diagram when Fig. 4 is 1588 clock synchronous school of the embodiment of the present invention.
Fig. 5 is the digitlization bus differential protection handset circuit block diagram of the embodiment of the present invention.
Fig. 6 is the schematic diagram of interpolation synchronous method.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.The remodeling method of Intelligent transformer station of the present invention, adopts the digitlization bus differential protection main frame (main frame) of Intelligent transformer station and digitlization bus differential protection handset (handset) to share in the process of transformation, comprises the following steps:
One, information gathering is transmitted and is switched, each a main frame is set by the traditional transformer station transformed, before intellectualized reconstruction is carried out to traditional transformer station, as shown in Figure 1, according to by the traditional transformer station actual interval number transformed, every estrade machine access 1-12 interval, therefore 1-3 estrade machine can be set by the 110kV tradition transformer station transformed, the transfer of the secondary cable at traditional transformer station bus differential protection each interval is connected to handset, carry out information gathering by handset and be transferred to main frame, realize information gathering to switch, each handset receives the intake at the interval be connected to, by every cycle 80 point, the interval of access is carried out to of ac (of ac) sampling of electric current and voltage, and the of ac obtained of sampling is converted to digital quantity, by optical fiber by intake, digital quantity transfers to main frame, what handset Receiving Host sent simultaneously outputs information, once main frame sends protection act signal, the relay of outputing by handset is realized a switch trip.
Two, after main frame receives intake that handset sends, digital quantity; judge that this is by the operational mode of traditional substation bus bar transformed according to the intake at each interval; by bus protection criterion, normal process is carried out to digital quantity; realize the real-time guard to bus; bus differential protection operation information is sent to the Automatic monitoring systems being positioned at main control room; realize the remote monitoring of substation operation personnel to bus differential protection; and storing bus differential protection operation information in the administrative unit of main frame, handled easily personnel are checked at any time by the man-machine interface of main frame.Bus differential protection operation information is the communication work information of intake, digital quantity, main frame and the handset that main frame receives handset and sends.
Three, intellectualized reconstruction is carried out to traditional transformer station, as shown in Figure 2, had a power failure by the primary equipment at the interval of transforming to being about to, respectively interval merge cells MU and intelligent terminal are electrically connected by the transforming plant primary equipment at cable and this interval, in order to gather of ac, the intake of electric current and the voltage needed, then merge cells MU and intelligent terminal and main frame are passed through Fiber connection, drop into primary equipment, merge cells MU and intelligent terminal deliver to main frame by the digital quantity of the electric current of collection and the of ac of voltage, intake.During transformation connection merge cells and intelligent terminal are carried out in each interval; main frame still receives by the intake at transformation interval, the digital quantity of of ac that gathers by 80, every cycle through handset; be combined digital quantity, the intake of unit and intelligent terminal being delivered to main frame not process, put into operation with bus differential protection during ensureing transformation.
Four, carry out in intellectualized reconstruction to traditional transformer station, to the interval completing intellectualized reconstruction, merge cells and intelligent terminal are by intelligent acess main frame, arranged by the messaging parameter revising main frame, the interval intake of collection and of ac are sent by handset being sent be switched on merge cells and intelligent terminal.The interval intelligent terminal completing transformation send intake in real time, and merge cells carries out of ac by 80, every cycle to interval and samples and analog-to-digital conversion send main frame, realizes the switching of transformation interval Information Monitoring.The messaging parameter of amendment main frame, by be the network service MAC Address of handset by the receiving parameter at transformation interval, APPID (application identities in IEC61850 stipulations), application identities be revised as MAC Address, APPID, the application identities of merge cells and intelligent terminal.
Five, all interval connects merge cells and intelligent terminal, and as shown in Figure 3, the main frame access spaced merge cells of institute and intelligent terminal, all remove handset, complete the transformation of Intelligent transformer station.
Described handset, as the visual plant in digitlization bus differential protection transformation process, gathers the intake at multiple interval respectively, carries out of ac sampling simultaneously, and by sampling, the of ac obtained is converted to digital quantity, then intake and digital quantity are transferred to main frame.
Described main frame is finally at the bus differential protection device of transformer station's long-time running; after tradition transformer station carries out intellectualized reconstruction; main frame receives the digital quantity of the of ac of electric current and the voltage that each interval merge cells send; the position signalling (intake) of the primary equipment that intelligent terminal send, judges the running status of bus after calculating.Bus operating condition can be checked at any time by the man-machine interface operating personnel of bus differential protection device; when bus runs and occurs abnormal; the alarm of main frame stand by lamp, man-machine interface will provide warning information; and send bus operation exception information by the network set up in station in real time to the Automatic monitoring systems being positioned at main control room; main frame sends protection act signal, realizes a switch trip by the relay of outputing of intelligent terminal.Main frame stores bus differential protection operation information.In intellectualized reconstruction process, main frame receives intake, the digital quantity that handset sends and carries out bus protection, when main frame sends protection act signal, realizes a switch trip by the relay of outputing of handset.
Intelligent terminal is intelligent assembly, adopts cable to be connected with transforming plant primary equipment, adopts Fiber connection with secondary devices such as protection, observing and controlling.Intelligent terminal gathers the intake of primary equipment, and intake is transferred to main frame; The amount of outputing that Receiving Host exports, controls primary equipment action.Transforming plant primary equipment is the equipment of transformer station's transmission & distribution electric energy, comprises circuit breaker, isolation switch, main transformer etc.
Merge cells is to the physical location carrying out time correlation combination from the electric current of two times transfer device and voltage data.Merge cells, as the interface arrangement of electronic current, voltage transformer, carries out merging and synchronous process, by the digital data transmission after process to main frame to electric current and voltage.But merge cells electronic current, voltage transformer component parts, may also be a separate unit.
As shown in Figure 5, handset is provided with alternating current sampling circuit (AC sampling plate), modulus A/D convertor circuit, opens into circuit (opening into plate), digital output circuit (exit plate), analog quantity sampling SV communication interface (SV communication interface board), the transformer substation case GOOSE communication interface (GOOSE communication interface board) towards general object, optical fiber interface, power supply.On the GOOSE communication interface board of handset, receive light mouth and arrange in pairs with transmission light mouth.Each circuit and interface adopt 1000M high velocity, low pressure differential signal transmission LVDS (LowVoltageDifferentialSignaling) bus.Each circuit of handset and interface classifying rationally plate, be reasonably assigned to each plate amount of calculation, make full use of the advantage of Distributed Calculation, realize high-performance.Handset can realize AC sampling and the transmission of input and output amount at 12 intervals, tunnel.When adopting synchronous couple of the precise clock synchronization consensus standard IEEE1588 of network measure and control system, do not relying under external clock condition, when having coordinated the synchronous of AC sampling and bus differential protection device pair with main frame.
Handset completes following work:
1, complete multi-compartment AC sampling and synchronous, send to main frame by direct-connected optical fiber with substation communication network and system protocol IEC61850-9-2 stipulations message by after alternating data acquisition modulus AD conversion.
2, gather multi-compartment intake, by direct-connected optical fiber, intake is sent to main frame with GOOSE stipulations message.
3, by the spaced apart output that direct-connected optical fiber Receiving Host sends with GOOSE stipulations message, then by relay outlet tripping operation.
The method of work of handset is:
1, exchange and gather, the AC sampling plate of handset gathers the of ac (alternating data acquisition) of multi-compartment electric current and voltage, the digital quantity (AC sampling data) that A/D convertor circuit obtains after alternating data acquisition is carried out AD conversion, send to SV communication interface board, the AC sampling data at each interval received combine by SV communication interface board, each interval AC sampling data after merging are pressed IEC61850-9-2 stipulations packing framing again, light signal is become by SV communication interface board glazing module converts, by the optical fiber line of ST model optical fiber interface and connection thereof, the message comprising AC sampling value information is sent to main frame.
2, gather open into output tripping operation, opening of handset is opened into signal into plate collection multi-compartment, send into GOOSE communication interface board, GOOSE communication interface board converts intake signal to digital information, the intake data chosen main frame and need are set according to the GOOSE functional module of handset, after the intake chosen is packed by the GOOSE message form specified according to IEC61850 standard, become light signal by GOOSE communication interface board glazing module converts, by the optical fiber line of ST model optical fiber interface and connection thereof, the message comprising intake data is sent to main frame.
The GOOSE communication interface board of the handset GOOSE that Receiving Host sends simultaneously trips message carry out packet parsing according to the form that IEC61850 standard specifies, obtain the current action command situation sent of main frame, when in GOOSE message to when should have an interval set tripping operation outlet order, spaced apart for outlet order output is sent to exit plate by GOOSE communication interface board, controls corresponding exit relay outlet tripping operation.
3, during synchronous couple of IEEE1588, according to the difference of role in synchronizing process, equipment on network can be divided into two classes, master clock and from clock.What provide synchronous clock source is master clock, and clock synchronous is with it called from clock, therefore master clock be relative from clock, any one network clocking can serve as master clock and from clock.As shown in Figure 4, when the first stage only has main frame to be connected with handset, main frame is as master clock, handset is as from clock, the point-to-point mode be directly connected is adopted between main frame with handset, do not rely on external synchronization clock and the network switch carries out inter-sync, communication reliability is high, and net synchronization capability is also high.Along with transformation is carried out, main frame access switch network, master/backup clock source is as master clock, and main frame, intelligent terminal and merge cells all realize synchronous as message when receiving the synchronous school of master clock from clock.Handset, as from clock, when can carry out synchronous school using main frame as master clock, also can pass through the switch network set up in access station, as message when receiving Network Synchronization school from clock together with main frame, intelligent terminal, merge cells.
The present embodiment is Intelligent transformer station for 330kV tradition Transfomer Substation Reconstruction; interval quantity is 16; First handset accesses 12 intervals; second estrade machine accesses 4 intervals; main frame adopts the BP-2C-D protection equipment for busbar of CYG Sunrui Co., Ltd.; merge cells adopts the BP-2C-D bus protection handset of CYG Sunrui Co., Ltd., and intelligent terminal adopts the NSR351D of Guodian Nannui Tech Co., Ltd, is divided into three phases:
1, the first stage is main frame and handset wiring and puts into operation, and to reduce primary equipment interruption duration in intellectualized reconstruction process, ensure that bus equipment has been in guard mode and has run, concrete engineering embodiment is divided into two kinds:
For the situation of dual tradition bus differential protection configuration, a set of traditional bus differential protection configuration puts into operation all the time, by out of service for another set of traditional bus differential protection configuration, the of ac in each loop, interval before the traditional bus differential protection exited is configured, the terminal order of input and output amount cable connection accesses handset, and main frame and handset are passed through Fiber connection, connect with main frame after the wiring of all access handsets has been changed, by checking that main frame shows, determine the of ac that main frame gathers, it is consistent that intake and a set of traditional bus differential protection in scene gather, again by tester to bus differential protection logic and output loop and test, after determining that connection is no problem, digitlization bus differential protection main frame and digitlization bus differential protection handset are put into operation.
For the situation of substanceization tradition bus differential protection configuration, if outdoor breaker, instrument transformer secondary side has the of ac of the required access of bus differential protection, the spare contact of input and output amount, by cable, spare contact is accessed handset, can not exit in existing traditional bus differential protection situation, by the of ac in each loop, interval, the terminal of input and output amount cable connection presses the order access handset of design drawing design, main frame and handset are passed through Fiber connection, connect with main frame after the wiring of all access handsets has been changed, by checking that main frame shows, determine the of ac that main frame gathers, input and output amount is consistent with scene, again by tester to bus differential protection logic and output loop and test, after determining that connection is no problem, digitlization bus differential protection main frame and digitlization bus differential protection handset are put into operation.
If the of ac of the required access of traditional bus differential protection configuration, input and output amount is without contact for subsequent use, then for reducing primary equipment interruption duration, conventional busbars protection need be exited, and as early as possible by before the traditional bus differential protection device exited connect the of ac in each loop, interval, the terminal order of input and output amount cable connection accesses handset, main frame and handset are passed through Fiber connection, after the wiring of all access handsets has been changed, complete main frame and handset wiring to transform and test, put into operation immediately after test is normal, by checking that main frame shows, determine the of ac that main frame gathers, input and output amount is consistent with scene, and by tester to bus differential protection logic and output loop and test, after determining that connection is no problem, digitlization bus differential protection main frame and digitlization bus differential protection handset are put into operation.
Consider the protective device of bus differential protection device as substation bus bar; extremely important to the safe operation of bus; except transformation is carried out perfect to protection, debugging plan in uniting and adjustment process early stage; the communication configuration file communicated with handset to the relay protective scheme of bus differential protection device, main frame carries out outside checking backs up; also need to coordinate with handset main frame after wiring completes and belt fuser is tested, to ensure correctness and the test completeness of main frame and the handset wiring put into operation.
Digitlization bus differential protection main frame after first stage completes and the wiring of digitlization bus differential protection handset are as shown in Figure 1.
2, second stage is the transformation interval that has a power failure, access digitlization bus differential protection main frame.
The transformation interval that has a power failure is coordinated to carry out digital improvement; had a power failure by the primary equipment at transformation interval; because the interval after digital improvement does not have cable terminal can be connected to traditional bus differential protection device; cause traditional bus differential protection device not collect improved interval information, traditional bus differential protection device is by out of service.Second stage is the emphasis step of bus differential protection intellectualized reconstruction, mainly comprises the following steps in transformation process:
(1) after being had a power failure by the primary equipment at transformation interval; carry out interval to be correlated with protection and the intellectualized reconstruction of circuit connection; remove the wiring at the interval that handset has connected; interval merge cells MU and intelligent terminal are electrically connected by the transforming plant primary equipment at cable and this interval; by merge cells MU and intelligent terminal and main frame by Fiber connection, change the configuration file of main frame.
(2) bus differential protection device after having transformed is debugged, checking bus differential protection logic, input and output amount, interface control document icd, character library form CID, learn the correctness of reference database SCD file and relevant empty terminal connections.
(3) drop into transformation interval primary equipment, observe bus differential protection each interval AC sampling correctness and synchronism, observe difference stream and open into correctness, if bus differential protection normal operation, can bus differential protection be dropped into.
Digitlization bus differential protection main frame in second stage transformation process connects as shown in Figure 2.
3, the phase III be all by transformation interval all access digitlization bus differential protection main frame.
After the equal access host in interval of all transformations that has a power failure, can remove handset completely, the bus differential protection of Intelligent transformer station has been transformed.Shown in digitlization bus differential protection main frame connection layout 3 after having transformed.
Bus differential protection transformation adopts the pattern of main frame+handset, and after the work of transformation connection main frame completes, need to test, the messaging parameter can revising main frame is arranged, and drop into digitlization bus differential protection, method of testing is:
(1) handset and interval merge cells synchronism detection
Because AC sampling synchronism is comparatively large on the impact of bus differential protection differential current computing, therefore need test the synchronism of handset and merge cells.For ensureing of ac sample-synchronous, the present embodiment main frame adopts interpolation synchronous method, synchronously do not rely on external synchronization clock, merge cells and handset need the digital quantity comprising of ac information sending 80, every cycle at equal intervals to main frame, ensure that communication channel delay and actual time delay keep completely the same.
As shown in Figure 6; the principle of interpolation synchronous method: write down corresponding moment T11, T12, T13 and T21, T22, T23 when bus differential protection receives each sampled value of every circuit-switched data of merge cells and handset; on each resampling moment point T entering interrupt routine; the data on each road all can have sampled value before and after it; numerical value and the time difference in moment is therewith put according to front and back; utilize Lagrange's interpolation algorithm can obtain one " synchronized sampling value ", the data " synchronized sampling value " on all roads are all that this is with reference to the moment.Move by after fixed interval with reference to moment T, calculate and constantly carry out, so obtain continuous print " synchronized sampling value ".
(2) bus differential protection configuration testing in transformation process
Bus differential protection configuration is the necessary file of bus differential protection communication, what file was generated by full station CONFIG.SYS SCD comprises the MAC Address that bus differential protection sends GOOSE message, APPID, GoID, GOOSE tripping operation information and bus differential protection need the merge cells of communication, intelligent terminal, the MAC Address of female difference handset, APPID, GoID, svID information, send the file of data message, when bus differential protection starts, need loading configuration file, by the information that whether message is correct and obtaining means needs from the message received that the transmission parameter of parameter determination bus differential protection message wherein and determining receives.
Because the present embodiment transformation interval quantity is many, transformation is pressed for time, transformation process relative complex, and it is great that bus differential protection configuration carries out impact smoothly on transformation process.Therefore the present embodiment in transformation process in bus differential protection configuration testing (uniting and adjustment) process for transformation each stage, test is configured to bus differential protection, configuration file is carried out simultaneously preservations back up.
Configuration testing is for adopting analog quantity tester simulated intelligence terminal, merge cells, handset or main frame and intelligent terminal, merge cells, handset simulated field being got up by Fiber connection before transformation, and intelligent terminal, merge cells, handset will be installed under configuration file, check intelligent terminal, merge cells, communicate between handset with main frame whether normal, simulation adds intake, of ac to main frame, check whether main frame correctly can receive message, after alarm, action, tripping operation information, warning information are correctly sent.Configuration file is not unique herein, but along with the progress transformed, there is main frame Information Monitoring is switched to intelligent terminal, merge cells situation from handset, switch all corresponding configuration file of main frame each time, handset, intelligent terminal, merge cells configuration file are unique.
Special project test in uniting and adjustment process ensure that correctness and the consistency of each file configuration of transformation process; saved the time of the final operating file configuration of bus differential protection device in transformation process and debugging greatly simultaneously; guarantee that bus differential protection retrofit work carries out smoothly in planned time, put into operation on time.
When bus differential protection device does not rely on outside pair, system realizes its defencive function, and the present embodiment bus differential protection sample-synchronous mode adopts interpolation synchronous method.Because sample-synchronous is very large to digitlization bus differential protection performance impact, therefore when uniting and adjustment, synchronously special project is carried out to handset and each merge cells and test.
Special method of testing is: the sampling delay time adopting mutual-inductor tester to be combined unit and handset is tested.The analog AC amount that standard source exports is connected to the AC sampling input of mutual-inductor tester, by same road of ac sampling access data collecting unit DAU merge cells or handset, merge cells and the defeated light-emitting window of handset digital sample are connected to the light mouth of tester simultaneously.The synchronizing signal of transformer station is received the synchronizing signal input of mutual-inductor tester, or use the synchronizing signal of this mutual-inductor tester then the output of the synchronizing signal of mutual-inductor tester to be connected to merge cells.The angular difference exported according to mutual-inductor tester and ratio, can test merge cells and whether accurately handset exports time delay, and determine that whether sample waveform is qualified.By serial connection electric current with and the system synchronization performance of mode to handset and merge cells connecing voltage carries out validation test.Because the present embodiment adopts traditional instrument transformer, analog quantity tester can be adopted as standard source.
Method of the present invention is applicable to carry out intellectualized reconstruction to traditional transformer station of 1000kV and following electric pressure, comprise the various main wiring modes of single busbar connection, single mother partition, double-bus, the single segmentation of two mother, the two segmentation of two mother (realizing in set of device) and 3/2 wiring, main electrical scheme change is by having configured.Maximum support main electrical scheme scale is 36 branch roads (circuit, element and interconnection switches).Method of the present invention adopts unified handset and system, achieves the standardization of handset, modularization, the configuration of system, convenient configuration and expansion.Handset, based on gigabit technology of Low Voltage Differential Signaling interface LVDS bus architecture and Design and application process, realizes Data classification process, realizes the mutual and low-power consumption of the Large Volume Data of protection equipment for busbar.Bus during LVDS school, each CPU board synchronization accuracy of handset can reach 0.1us.Be suitable for the synchronous and multiple clock method of synchronization (pulse per second (PPS), B code, IEEE1588) of interpolation.
Method transformation process of the present invention does not affect the protection operational mode and sharing of load that transformer station stands entirely, and is applicable to various main wiring mode; The interruption duration of primary equipment during decreasing transformation; only needed to have a power failure once by the primary equipment transformed; bus differential protection is shorter for disengaging time; operation of power networks reliability is high; reduce difficulty of construction, increase work efficiency, invest less; only need to increase handset screen cabinet, handset screen cabinet can repeated multiple timesly use.

Claims (10)

1. a remodeling method for Intelligent transformer station, comprises the following steps:
One, information gathering is transmitted and is switched, by the traditional transformer station transformed, a digitlization bus differential protection main frame is set, by every platform digitlization bus differential protection handset access 1-12 interval, the transfer of the secondary cable at traditional transformer station bus differential protection each interval is connected to digitlization bus differential protection handset, digitlization bus differential protection handset receives the intake at the interval be connected to, by every cycle 80 point, the interval of access is carried out to the of ac sampling of electric current and voltage, of ac is converted to digital quantity, by optical fiber, intake, digital quantity is transferred to digitlization bus differential protection main frame;
Two, after digitlization bus differential protection main frame receives intake that digitlization bus differential protection handset sends, digital quantity, judge the operational mode of bus according to the intake at each interval, digital quantity is processed by bus protection criterion, realize the real-time guard to bus;
Three, the primary equipment at interval is had a power failure, respectively interval merge cells and intelligent terminal are electrically connected by the transforming plant primary equipment at cable and this interval, then by merge cells and intelligent terminal and digitlization bus differential protection main frame by Fiber connection, drop into primary equipment;
Four, to the interval completing intellectualized reconstruction, the messaging parameter of amendment digitlization bus differential protection main frame is arranged, the interval intake of collection and of ac being sent by digitlization bus differential protection handset being sent be switched on merge cells and intelligent terminal, realizing the switching of transformation interval Information Monitoring;
Five, the digitlization bus differential protection main frame access spaced merge cells of institute and intelligent terminal, all remove handset, complete the transformation of Intelligent transformer station.
2. the remodeling method of Intelligent transformer station according to claim 1; it is characterized in that: what in described step one, digitlization bus differential protection handset reception digitlization bus differential protection main frame sent outputs information; digitlization bus differential protection main frame sends protection act signal, realizes a switch trip by the relay of outputing of digitlization bus differential protection handset.
3. the remodeling method of Intelligent transformer station according to claim 2; it is characterized in that: described digitlization bus differential protection handset receives the GOOSE tripping operation message of digitlization bus differential protection main frame transmission and carries out packet parsing according to the form that IEC61850 standard specifies; obtain the current action command sent of digitlization bus differential protection main frame; when in GOOSE message to when should have an interval set tripping operation outlet order; outlet order is sent out, controls corresponding exit relay outlet tripping operation.
4. the remodeling method of Intelligent transformer station according to claim 1, it is characterized in that: bus differential protection operation information is sent to the Automatic monitoring systems being positioned at main control room by described step 2 digitlization bus differential protection main frame, realizes the remote monitoring of substation operation personnel to bus differential protection; Described digitlization bus differential protection main frame stores bus differential protection operation information; Described bus differential protection operation information is the communication work information of intake, digital quantity, main frame and the handset that main frame receives handset and sends.
5. the remodeling method of Intelligent transformer station according to claim 1, it is characterized in that: after described step 3 drops into primary equipment, merge cells and intelligent terminal are by the digital quantity of the of ac of the electric current that gathers and voltage, intake is delivered to digitlization bus differential protection main frame, during transformation connection merge cells and intelligent terminal are carried out in each interval, digitlization bus differential protection main frame still receives by the intake at transformation interval through digitlization bus differential protection handset, the digital quantity of the of ac gathered by 80, every cycle, be combined digital quantity unit and intelligent terminal being delivered to main frame, intake does not process.
6. the remodeling method of Intelligent transformer station according to claim 1, is characterized in that: before the messaging parameter of described step 4 amendment digitlization bus differential protection main frame is arranged, test, method of testing is:
The synchronism of digitlization bus differential protection handset and merge cells is tested, merge cells and digitlization bus differential protection handset send the digital quantity by every cycle 80 of acs gathered to digitlization bus differential protection main frame at equal intervals, and digitlization bus differential protection main frame adopts interpolation synchronous method to process;
To bus differential protection configuration testing, adopt analog quantity tester simulated intelligence terminal, merge cells, digitlization bus differential protection handset or before transformation by digitlization bus differential protection main frame and intelligent terminal, merge cells, digitlization bus differential protection handset simulated field is got up by Fiber connection, and install to intelligent terminal by under configuration file, merge cells, digitlization bus differential protection handset, check intelligent terminal, merge cells, whether normally communicate between digitlization bus differential protection handset with digitlization bus differential protection main frame, simulation adds intake to digitlization bus differential protection main frame, of ac, check whether digitlization bus differential protection main frame correctly can receive message, alarm, after action, to be tripped information, warning information correctly sends.
7. the remodeling method of Intelligent transformer station according to claim 1; it is characterized in that: the interval intelligent terminal that described step 4 completes transformation send intake in real time, merge cells is sampled by 80, every cycle to the of ac that electric current and voltage are carried out in interval and analog-to-digital conversion send digitlization bus differential protection main frame.
8. the remodeling method of Intelligent transformer station according to claim 1, it is characterized in that: described digitlization bus differential protection handset gathers the of ac of multi-compartment electric current and voltage, the AC sampling data obtained after analog-to-digital conversion, AC sampling data are combined, time synchronized is carried out by the AC sampling data of difference sampling algorithm to different interval, IEC61850-9-2 stipulations packing framing is pressed again by merging each interval AC sampling data synchronously, convert light signal to, by optical fiber line, the message comprising AC sampling value information is sent to digitlization bus differential protection main frame.
9. the remodeling method of Intelligent transformer station according to claim 1; it is characterized in that: described digitlization bus differential protection handset gathers multi-compartment and opens into signal; convert digital information to; after the intake chosen is packed by the GOOSE message form specified according to IEC61850 standard; convert light signal to, by optical fiber line, the message comprising intake data is sent to digitlization bus differential protection main frame.
10. the remodeling method of Intelligent transformer station according to claim 1, it is characterized in that: described step one, for the configuration of dual tradition bus differential protection, a set of traditional bus differential protection configuration puts into operation all the time, by out of service for another set of traditional bus differential protection configuration, the of ac in each loop, interval, the terminal order of input and output amount cable connection before the traditional bus differential protection configuration exited are accessed digitlization bus differential protection handset;
For the configuration of substanceization tradition bus differential protection outdoor breaker, instrument transformer secondary side have access needed for bus differential protection of ac, input and output amount spare contact, by cable, spare contact is accessed digitlization bus differential protection handset, do not exit existing traditional bus differential protection;
The of ac accessed needed for the configuration of tradition bus differential protection, input and output amount are without contact for subsequent use; exit conventional busbars protection, institute before the traditional bus differential protection device exited is connect the of ac in each loop, interval, the terminal of input and output amount cable connection sequentially accesses handset.
CN201310726673.0A 2013-12-25 2013-12-25 The remodeling method of Intelligent transformer station Active CN103746304B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310726673.0A CN103746304B (en) 2013-12-25 2013-12-25 The remodeling method of Intelligent transformer station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310726673.0A CN103746304B (en) 2013-12-25 2013-12-25 The remodeling method of Intelligent transformer station

Publications (2)

Publication Number Publication Date
CN103746304A CN103746304A (en) 2014-04-23
CN103746304B true CN103746304B (en) 2016-03-02

Family

ID=50503309

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310726673.0A Active CN103746304B (en) 2013-12-25 2013-12-25 The remodeling method of Intelligent transformer station

Country Status (1)

Country Link
CN (1) CN103746304B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104332962B (en) * 2014-11-06 2017-06-16 国家电网公司 The intelligent bus differential protection of transformer station's generation and the method for corresponding intelligent interval protection
CN104701985A (en) * 2015-03-13 2015-06-10 南京南瑞继保电气有限公司 Interface smooth transition method and interface smooth transition system in modifying process of transformer substation
CN104991542A (en) * 2015-07-17 2015-10-21 国家电网公司 Application of a cluster testing and control system in conventional-to-intelligent substation modification projects
CN105162254B (en) * 2015-09-01 2018-01-05 国网浙江省电力公司 Transformer station's digital improvement method
CN106711963B (en) * 2016-11-17 2018-11-20 云南电网有限责任公司电力科学研究院 Multistage route differential protective system and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101854054A (en) * 2010-02-08 2010-10-06 广东电网公司中山供电局 Bus protection system of transformer station and protection method thereof
CN102868218A (en) * 2012-09-04 2013-01-09 昆山市万丰制衣有限责任公司 Transition method for improving monitoring system in intelligent improvement of ordinary transformer substation
CN102983627A (en) * 2012-10-19 2013-03-20 上海市电力公司 Transition method of intellectualized monitoring system modification process of conventional transformer substation
CN103036216A (en) * 2012-12-07 2013-04-10 延安供电局 System and clock synchronization method applied to intelligentized converting station digitization busbar differential protection

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101854054A (en) * 2010-02-08 2010-10-06 广东电网公司中山供电局 Bus protection system of transformer station and protection method thereof
CN102868218A (en) * 2012-09-04 2013-01-09 昆山市万丰制衣有限责任公司 Transition method for improving monitoring system in intelligent improvement of ordinary transformer substation
CN102983627A (en) * 2012-10-19 2013-03-20 上海市电力公司 Transition method of intellectualized monitoring system modification process of conventional transformer substation
CN103036216A (en) * 2012-12-07 2013-04-10 延安供电局 System and clock synchronization method applied to intelligentized converting station digitization busbar differential protection

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
常规站智能化改造中母线保护方案研究;吕航等;《江苏电机工程》;20120731;第31卷(第4期);第48-51页 *

Also Published As

Publication number Publication date
CN103746304A (en) 2014-04-23

Similar Documents

Publication Publication Date Title
CN103746304B (en) The remodeling method of Intelligent transformer station
CN102937685B (en) The integrated testing platform of a kind of transformer station based on Real-time Simulation Technology
CN101465564B (en) In-situ digitalization method and apparatus for transforming plant primary equipment
CN103744417A (en) Multifunctional integrated measurement and control apparatus and system for intelligent transformer station
CN101465563A (en) Integrated automation integration protection method and system
CN103703654A (en) Merging unit and method of operating a merging unit
CN101576743B (en) Distributed ring main unit monitor terminal
CN102290865A (en) Integrated intelligent unit of intelligent substation
CN101958581A (en) Network message monitoring and fault recording integrated device for intelligent transformer substation
CN107681642A (en) A kind of transformer station's site protects system
CN103200280B (en) Transformer station process layer interface equipment
CN201846138U (en) Breaker intelligent assembly based on unified section data acquisition
CN202142911U (en) An intelligent monitoring module and a distributed distribution terminal having the intelligent monitoring module
CN102255388A (en) Distributed distribution network terminal device
CN104935079A (en) Station-domain protection system of intelligent transformer station and function debugging method of system
CN203166626U (en) Intelligent traction substation
CN104753085A (en) Remote online monitoring system for distributed photovoltaic access
CN102072996A (en) System for realizing automatic digital protection and closed loop moving die test
CN103915898A (en) Operation and maintenance method for intelligent substation network
CN103036216B (en) System and clock synchronization method applied to intelligentized converting station digitization busbar differential protection
CN104701979A (en) Protective measurement and control integrated device and protective measurement and control method
CN201966689U (en) Integrated device used for network message monitoring and fault recording of intelligent substation
CN106532939A (en) Main-sub-machine heterogeneous in-situ measurement control device applied on intelligent transformer substation
CN102983632A (en) Synchronous sampling method for protected data of digital tractor substation
WO2016090934A1 (en) Simulation test device for mutual inductor of lte wireless communication intelligent substation

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant