CN102420464B - Intelligent body protection device and protection method thereof - Google Patents
Intelligent body protection device and protection method thereof Download PDFInfo
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- CN102420464B CN102420464B CN201110399155.3A CN201110399155A CN102420464B CN 102420464 B CN102420464 B CN 102420464B CN 201110399155 A CN201110399155 A CN 201110399155A CN 102420464 B CN102420464 B CN 102420464B
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- 241000272814 Anser sp. Species 0.000 claims description 5
- 238000004868 gas analysis Methods 0.000 abstract description 5
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- 238000012544 monitoring process Methods 0.000 abstract description 3
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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Abstract
The invention relates to an intelligent body protection device and a protection method thereof. Due to the adoption of the intelligent body protection device and the method thereof, the reliability and the rapidness of the tripping operation are improved. The intelligent body protection device comprises a CPU (central processing unit) and a relay. One path of non-electricity protection signal outputs a tripping signal TZ by utilizing the relay; the other path of non-electricity protection signal is sent to the CPU and the CPU sends a signal record XH; the CPU is also additionally provided with two paths of inputs; one path of input is a DGA (Dissolved Gas Analysis) control word determined by a user; the other path of input is DGA information; the DGA information comprises early warning information sent out by a DGA unit and information of various component gases dissolved in transformer oil; the DGA information is sent out by a GOOSE (Generic Object Oriented Substation Event)/MMS (Multimedia Messaging Service) form; after the DGA information is judged by the CPU, a tripping signal TZ1 and a signal record XH1 are output; and the tripping signals TZ and TZ1 are connected in parallel to a tripping circuit and are both used for realizing tripping of a transformer. In the scheme, DGA (Dissolved Gas Analysis) on-line monitoring information is introduced to improve the reliability and the rapidness of protection of a transformer body and the intelligent body protection device and the protection method thereof are convenient to analyze the condition of the body protection operation later.
Description
Technical field
The invention belongs to electricity field, particularly relate to a kind of Intelligent body protection device and method thereof that is applicable to digitizing station.
Background technology
At present, transformer is provided with special non-electricity protecting device, mainly monitors the information such as temperature of oil in transformer, gas, oil level.In the time of corresponding switching value signal input, main body protection directly trips by cable, has very strong real-time.DGA is dissolved gas analysis device, is used for reflecting the faults such as the inner various heatings of transformer and electric discharge, and maturity is high.In operation of power networks, 220kV and above and important 110kV transformer generally all will maybe will adopt DGA device, its various component information and situation of change reflection transformer over-heat inside by oil dissolved gas, the abnormal conditions such as discharge, make moist.
Existing some subject matters be:
1) adopt cable transformer body signal to be sent to the transformer body protective device of master-control room from transformer body.In the time having very strong power frequency to disturb, on the long cable of coupling time, main body protection device may receive wrong input signal and export tripping operation;
2) for addressing the above problem; generally adopt at present relay to open into mode; on the one hand by the method for energy drives threshold (relay coil operating power is 5W), prevent that by the method for relay time delay 18～35ms on-the-spot electromagnetic disturbance or overvoltage from causing protection malfunction on the other hand.Clearly, this method can reduce the responsiveness of transformer body protection, isolated fault equipment rapidly.
Summary of the invention
The object of the invention is to address the above problem, a kind of Intelligent body protection device and method thereof are provided, improved reliability and the rapidity of tripping operation.This scheme is introduced DGA (dissolved gas analysis) on-line monitoring information and is improved reliability and the rapidity of transformer body protection, and the convenient analysis to main body protection action situation afterwards.
To achieve these goals, the technical solution used in the present invention is:
A kind of Intelligent body protection device, it comprises CPU and relay, non electrical quantity guard signal one tunnel utilizes relay output TZ trip signal, guard signal is given CPU by another road, CPU sends signal and records XH, and described CPU also has additional two-way input, and a road is the definite DGA control word of user; Another road is DGA information, this DGA packets of information has contained the various component gases information of dissolving in early warning information that DGA sends and transformer oil, form by GOOSE/MMS is sent into, after differentiating, CPU exports trip signal TZ1 and signal records XH1, trip signal TZ and TZ1 are parallel to trip(ping) circuit, and all for realizing transformer tripping operation.
A guard method for Intelligent body protection device, its detailed process is:
1) detect and whether have non electrical quantity guard signal, if detect the fault that non electrical quantity occurs, utilize relay to produce TZ trip signal by non electrical quantity guard signal one tunnel, guard signal is given CPU by another road, send signal XH, then proceed to step 4);
2) CPU detects whether there is DGA control word signal, if do not had, proceeds to step 1); If had, proceed to step 3);
3) CPU reads DGA information, this packets of information has contained various component gases information in early warning information that DGA sends and transformer oil, CPU carries out logic judgement by DGA information, in the time that DGA packets of information contains internal fault feature, the condition of open tripping operation, if now detect again that non electrical quantity guard signal exists, record XH1 without time delay generation trip signal TZ1 and signal, and proceed to step 4); Open when DGA trip condition, but while now non electrical quantity guard signal not detected, do not trip, proceed to step 1); Open when DGA does not possess trip condition, directly return to step 1);
4) form of TZ trip signal and trip signal TZ1 parallel connection access trip(ping) circuit, as long as have an appearance in both, controls trip operation; Otherwise, do not carry out tripping operation action.
Described step 3) in, CPU to the logic deterministic process of DGA information is: whether CPU detects in transformer oil various component gases information has gas content out-of-limit and generate the out-of-limit situation of gas rate of change and exist, also detect and whether have early warning signal simultaneously, and three is passed through to logical "or" resume module, as long as there is an existence, just send signal, this signal one tunnel is directly as signal XH1, and logical “and” module is sent on another road; Logical “and” detects the signal that whether has body trip signal, DGA control word and logical "or" to send here, if all existed, produces trip signal TZ1.
Intelligent body protection device of the present invention, it is introduced DGA (dissolved gas analysis) on-line monitoring information and improves rapidity and the reliability of transformer body protection action.It does not affect original main body protection function, and the information decision logic of the DGA of increase is realized in the CPU of original main body protection, in the time that body signal and DGA fault-signal exist simultaneously, drives the fast trip outlet of independent and original main body protection tripping operation outlet.
Detailed process is:
1) user determines whether adding DGA information to differentiate transformer outlet by dropping into " DGA control word ", if do not adopt this kind of scheme, exits " DGA control word ";
2) DGA information has comprised the assessment result of DGA and seven kinds of component information of transformer oil simultaneously;
3), in the time dropping into DGA control word, the convenient information of sending here with DGA is processed and differentiates in the CPU of main body protection device; In the time that body signal and DGA fault-signal exist simultaneously, main body protection device tripping operation outlet, this tripping operation outlet is independent of original main body protection device tripping operation outlet, because it be to export fast, plays the Accelerated trip effect under failure condition.
The information exchange of described DGA is crossed GOOSE/MMS and sends to the CPU of Intelligent body protection device.
Described " DGA control word " exits in situation, still judges power transformer interior fault situation by the information of DGA.
Wherein, in CPU, to the processing method of DGA information be:
Body switching value signal access way is the same with traditional main body protection; when access tripping relay, after diode-isolated, be connected to opening into (referring to Fig. 1) of CPU; be connected to the body switching value of CPU on the one hand as signal record (XH), protect one of startup necessary condition of outlet fast simultaneously as intelligent noumenon.This intelligent noumenon protection adopts IEC 61850 standards simultaneously, introduce the signal of DGS device in high speed fibre Ethernet mode, the gas that has comprised seven kinds of components in early warning information that DGA sends and transformer oil, form by GOOSE/MMS is sent into, (seeing Fig. 2) output trip signal TZ1 and signal XH after cpu logic is differentiated; TZ and TZ1 all realize transformer tripping operation.
Fig. 2 is given in the Trip Logic of intelligent noumenon protection; input comprises the body trip signal switching value of hard contact mode; the concentration information of H2, CO in DGA that Internet Transmission is come assessment failure volume and transformer oil, CH4, C2H2, C2H4, C2H6, seven kinds of dissolved gases of CO2; these seven kinds of gas composition content information divide two-way to give two software discrimination modules: the out-of-limit discrimination module of gas content and generate gas rate of change out-of-limit discrimination module, differentiate with this whether every gas content is out-of-limit and whether every gas rate of change is out-of-limit.Together with three groups of switching values of malfunction of the result of two discrimination module generations and DGA assessment, carry out OR operation, as long as wherein an index is fault, exports malfunction and arrive next step, otherwise directly exit, no longer carry out next step operation; Next step time, if user has dropped into DGA control word, export trip signal XH1.
The invention has the beneficial effects as follows: 1. add DGA information in order to differentiate the outlet of transformer, improved the rapidity of transformer action; 2. user can move back DGA control word by throwing and determine whether adding DGA information differentiation tripping operation, has improved flexibility; 3. the information that DGA sends has comprised the assessment result of DGA and seven kinds of component information of transformer oil simultaneously; 4. the information of DGA realizes in the CPU of original main body protection, does not affect main body protection function; 5. accuracy and the rapidity of tranformer protection tripping operation have been improved.
This intelligent noumenon protection implementation is simple, has fully improved tranformer protection accuracy of action and rapidity.
Accompanying drawing explanation
Fig. 1 is this intelligent noumenon protection implementation schematic diagram.
Fig. 2 utilizes the DGA information implementation schematic diagram that trips in CPU.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention will be further described.
As shown in Figure 1, solid line part is the fundamental diagram of original main body protection device, and the present invention is retaining on the loop of original main body protection and the basis of function, increases the information judgment section of DGA.The DGA increasing differentiates part and dots.
The part increasing comprises, outside DGA device is to CPU input DGA information and the definite DGA control word of user, this packets of information has contained seven kinds of component gases information in early warning information that DGA sends and transformer oil, form by GOOSE/MMS is sent into, and after CPU differentiates, exports trip signal TZ1 and signal XH1.
Whether control word can make user select to utilize DGA information to participate in the control of tripping operation, and some words also will detect DGA information in existing control; If it's not true, only utilize existing structure to complete tripping operation and control.
Meanwhile, intelligent noumenon has retained original main body protection function, if detect the fault that non electrical quantity occurs, utilizes relay to carry out TZ tripping operation by non electrical quantity guard signal simultaneously, sends signal XH.TZ tripping operation and TZ1 tripping operation access in parallel trip(ping) circuit fast, therefore, system reliability is high.
A guard method for Intelligent body protection device, its detailed process is:
1) detect and whether have non electrical quantity guard signal, if detect the fault that non electrical quantity occurs, utilize relay to produce TZ trip signal by non electrical quantity guard signal one tunnel, guard signal is given CPU by another road, send signal XH, then proceed to step 4);
2) CPU detects whether there is DGA control word signal, if do not had, proceeds to step 1); If had, proceed to step 3);
3) CPU reads DGA information, this packets of information has contained various component gases information in early warning information that DGA sends and transformer oil, CPU carries out logic judgement by DGA information, in the time that DGA packets of information contains internal fault feature, the condition of open tripping operation, if now detect again that non electrical quantity guard signal exists, record XH1 without time delay generation trip signal TZ1 and signal, and proceed to step 4); Open when DGA trip condition, but while now non electrical quantity guard signal not detected, do not trip, proceed to step 1); Open when DGA does not possess trip condition, directly return to step 1);
4) form of TZ trip signal and trip signal TZ1 parallel connection access trip(ping) circuit, as long as have an appearance in both, controls trip operation; Otherwise, do not carry out tripping operation action.
In Fig. 2, described step 3) in, the processing scheme to DGA information in CPU, input comprises the malfunction of switching value: DGA assessment; Analog quantity: seven kinds of dissolved gas components in transformer oil.Wherein, these seven kinds of gas compositions divide two-way to give two modules: the out-of-limit discrimination module of gas content and generate gas rate of change out-of-limit discrimination module, differentiate with this whether every gas content is out-of-limit and whether every gas rate of change is out-of-limit.Together with three groups of switching values of malfunction of the result of two discrimination module generations and DGA assessment, carry out OR operation, as long as wherein an index is fault, exports malfunction and arrive next step, otherwise directly exit, no longer carry out next step operation.Next step time, if user has dropped into DGA control word, export trip signal TZ1.
Claims (1)
1. the guard method of an Intelligent body protection device, described device, comprise CPU and relay, non electrical quantity guard signal one tunnel utilizes relay output TZ trip signal, guard signal is given CPU by another road, and CPU sends signal and records XH, it is characterized in that, described CPU also has additional two-way input, and a road is the definite DGA control word of user; Another road is DGA information, this DGA packets of information has contained the various component gases information of dissolving in early warning information that DGA sends and transformer oil, form by GOOSE/MMS is sent into, after differentiating, CPU exports trip signal TZ1 and signal records XH1, trip signal TZ and TZ1 are parallel to trip(ping) circuit, and all for realizing transformer tripping operation; It is characterized in that, its detailed process is:
1) detect whether there is non electrical quantity guard signal, if detect the fault that non electrical quantity occurs, utilize relay to produce TZ trip signal by non electrical quantity guard signal one tunnel, guard signal is given CPU by another road, sends signal XH, then proceeds to step 4);
2) CPU detects whether there is DGA control word signal, if do not had, proceeds to step 1); If had, proceed to step 3);
3) CPU reads DGA information, this packets of information has contained various component gases information in early warning information that DGA sends and transformer oil, CPU carries out logic judgement by DGA information, in the time that DGA packets of information contains internal fault feature, the condition of open tripping operation, if now detect again that non electrical quantity guard signal exists, record XH1 without time delay generation trip signal TZ1 and signal, and proceed to step 4); Open when DGA trip condition, but while now non electrical quantity guard signal not detected, do not trip, proceed to step 1); Open when DGA does not possess trip condition, directly return to step 1);
4) form of TZ trip signal and trip signal TZ1 parallel connection access trip(ping) circuit, as long as have an appearance in both, controls trip operation; Otherwise, do not carry out tripping operation action;
In described step 3), CPU to the logic deterministic process of DGA information is: whether CPU detects in transformer oil various component gases information has gas content out-of-limit and generate the out-of-limit situation of gas rate of change and exist, also detect and whether have early warning signal simultaneously, and three is passed through to logical "or" resume module, as long as there is an existence, just send signal, XH1 is directly recorded as signal in this signal one tunnel, and logical “and” module is sent on another road; Logical “and” detects the signal that whether has body trip signal, DGA control word and logical "or" to send here, if all existed, produces trip signal TZ1.
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| CN201110399155.3A CN102420464B (en) | 2011-12-05 | 2011-12-05 | Intelligent body protection device and protection method thereof |
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| CN201110399155.3A CN102420464B (en) | 2011-12-05 | 2011-12-05 | Intelligent body protection device and protection method thereof |
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| CN102420464B true CN102420464B (en) | 2014-06-11 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1632996A (en) * | 2004-12-22 | 2005-06-29 | 刘建南 | An intelligent transformer operating and controlling device and its use |
| CN202334002U (en) * | 2011-12-05 | 2012-07-11 | 山东电力研究院 | Intelligent body protection device |
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- 2011-12-05 CN CN201110399155.3A patent/CN102420464B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1632996A (en) * | 2004-12-22 | 2005-06-29 | 刘建南 | An intelligent transformer operating and controlling device and its use |
| CN202334002U (en) * | 2011-12-05 | 2012-07-11 | 山东电力研究院 | Intelligent body protection device |
Non-Patent Citations (2)
| Title |
|---|
| 刘有为.智能电力变压器信息流方案的设计.《电网技术》.2011,第35卷(第1期),正文1-4页、图1-6. |
| 智能电力变压器信息流方案的设计;刘有为;《电网技术》;20110131;第35卷(第1期);正文1-4页、图1-6 * |
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Effective date of registration: 20121219 Address after: 250002 Ji'nan City Central District, Shandong, No. 2 South Road, No. 500 Applicant after: SHANDONG ELECTRIC POWER Research Institute Applicant after: State Grid Corporation of China Address before: 250002 Ji'nan City Central District, Shandong, No. 2 South Road, No. 500 Applicant before: SHANDONG ELECTRIC POWER Research Institute |
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Address after: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee after: Shandong Electric Power Research Institute Patentee after: State Grid Corporation of China Address before: 250002, No. 500, South Second Ring Road, Shizhong District, Shandong, Ji'nan Patentee before: Shandong Electric Power Research Institute Patentee before: State Grid Corporation of China |
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Address after: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee after: SHANDONG ELECTRIC POWER Research Institute Patentee after: STATE GRID CORPORATION OF CHINA Address before: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee before: SHANDONG ELECTRIC POWER Research Institute Patentee before: State Grid Corporation of China |
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Effective date of registration: 20220128 Address after: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Patentee after: STATE GRID CORPORATION OF CHINA Address before: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee before: SHANDONG ELECTRIC POWER Research Institute Patentee before: STATE GRID CORPORATION OF CHINA |
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