CN102244380A - Open-phase protection method and device of 35kV American box-type substation for wind power station - Google Patents
Open-phase protection method and device of 35kV American box-type substation for wind power station Download PDFInfo
- Publication number
- CN102244380A CN102244380A CN2011100959965A CN201110095996A CN102244380A CN 102244380 A CN102244380 A CN 102244380A CN 2011100959965 A CN2011100959965 A CN 2011100959965A CN 201110095996 A CN201110095996 A CN 201110095996A CN 102244380 A CN102244380 A CN 102244380A
- Authority
- CN
- China
- Prior art keywords
- phase
- current
- pressure side
- low
- transformer
- 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.)
- Granted
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to an open-phase protection method and device of a 35kV American box-type substation for a wind power station, belonging to the technical field of power system failure analysis. A current transformer and a zero sequence transformer in a breaker are used to collect required current signals and then the current signals are operated by a central processing unit to obtain current magnitude which is taken as a main criterion, and an auxiliary criterion current magnitude is collected and operated by a system directly; the non electrical quantity and a switching value are subjected to optoelectronic isolation and then collected by the central processing unit so as to judge the open-phase state of the 35kV American box-type substation for the wind power station; and a control output module outputs the judgment result automatically or manually in accordance with conditions. The method and device provided by the invention is suitable for eliminating the open-phase operation failures at a high-voltage side and a low-voltage side of the 35kV American box-type substation for the wind power station; and the device integrates the protection function, the control function, the measurement function, the state monitoring function and the like into a whole, has the open-phase protection function at the high-voltage side and the low-voltage side of the transformer, the overcurrent protection function at the low-voltage side, the overvoltage function, the undervoltage protection function and the overload alarm function, and can prevent a wind driven generator from being influenced by burnout of a fuse at a high-voltage side of a step-up transformer.
Description
Technical field:
The present invention relates to a kind of wind energy turbine set with American box transformer phase-lacking protective method of 35kV and device, belong to the power system fault analysis technical field.
Background technology:
Box-type substation (being called for short case becomes) generally is made up of hyperbaric chamber, transformer room and low-pressure chamber.According to the difference of product structure difference and employing components and parts, be divided into European case change and American case and become two kinds of typical styles.American case becomes the high-pressure side and adopts the fuse protection, and on-load switch only plays the function of switching conversion and cutoff high load current, and capacity is less.When a phase fuse failure appears in the high-pressure side, the voltage of low-pressure side just reduces, and moulds under voltage protection of shell automatic air-break switch or overcurrent protection and will move, and low pressure operation can not take place.In electric power system, transmission line one disconnects mutually or two-phase disconnection (containing fuse blows) is called as non-full-operating state, claims vertical unbalanced fault again.In the case, can not cause overvoltage, generally can not cause big electric current (open-phase operation is followed except the vibration situation) yet, but owing to occurred vertical asymmetric, to produce negative sequence component, zero-sequence component (except the isolated neutral system) in the system, when negative-sequence current flows through generator, jeopardize generator amature, cause the overheated and insulation damages of rotor, influence generator output.In wind power plant, the design of the low pressure of step-up transformer (0.69kV) side has circuit breaker, and fuse is installed in the high-pressure side, but does not have the open-phase protection function.
Summary of the invention:
The object of the invention provides a kind of wind energy turbine set American box transformer phase-lacking protective method of 35kV and device; for preventing that step-up transformer high pressure (35kV) side from influencing wind-driven generator because of fuse blows; set up the open-phase protection function; can move in signal; also can move in tripping operation; and show by message, solve the problems referred to above that exist in the background technology.
Technical scheme of the present invention is:
A kind of wind energy turbine set American box transformer phase-lacking protective device of 35kV; comprise central processing unit, electric current input module, voltage input module, non electrical quantity and switching input module, analog-to-digital conversion module, photoelectric isolation module, human-computer interaction module, control output module; electric current input module, voltage input module connect central processing unit by analog-to-digital conversion module; non electrical quantity and switching input module connect central processing unit by photoelectric isolation module, connect central processing unit junctor interactive module, control output module.
The present invention has RS485 interface, CAN bus interface (apolegamy), supports IEC60870-5-103, Modbus agreement; Can with wind energy turbine set supervisory control system interface.
A kind of wind energy turbine set American box transformer phase-lacking protective method of 35kV; by current transformer in the circuit breaker and zero-sequence transformer; to calculate the magnitude of current by central processing unit after the needed current signal collection; as main dish certificate; the assistant criteria voltage is directly from the system acquisition union; non electrical quantity and switching value are handed over the central processing unit collection after photoelectricity is isolated, judge that wind energy turbine set becomes scarce state with the American case of 35kV, and the control output module is according to condition automatic or manual output result of determination.
Open-phase protection of the present invention, the output result action in wind power plant, influences wind-driven generator for preventing the step-up transformer high-pressure side because of fuse blows in signal or move in tripping operation.
Said judgement wind energy turbine set becomes scarce state with the American case of 35kV and is divided into: 1. single-phase phase shortage is differentiated; 2. the two-phase phase shortage is differentiated; 3. the three-phase phase shortage is differentiated; 4. low-pressure side phase shortage; 5. overload alarm.
Wind energy turbine set primary system situation: the design of step-up transformer low pressure (0.69kV) side has circuit breaker, current transformer, the no-voltage instrument transformer, and transformer high-voltage (35kV) side is installed fuse, no circuit breaker.The failure condition that open-phase operation takes place has:
1) high-pressure side is normally moved, and no short trouble or phase fault cause, a phase fuse melting;
2) two-phase short-circuit fault takes place in the high-pressure side, causes the two-phase fuse melting;
3) three phase short circuit fault takes place in the high-pressure side, causes the three-phase fuse melting;
4) low-pressure side generation earth fault, phase fault, open-phase operation.
The overload alarm also is the function that the present invention possesses, and for ease of narration, puts together with the phase shortage judgement.
It is as follows that the concrete phase shortage of the present invention is differentiated process:
1. single-phase phase shortage is differentiated: low pressure (0.69kV) side three-phase current is all less than maximum load current, and harmonic current components is little, and fuse blows takes place high pressure (35kV) side any mutually, causes the three-phase current size and the phase place of low-pressure side to change; The size and the phase place of high-pressure side secondary current also change thereupon; Low-pressure side is a positive phase sequence before the open-phase fault, and the three-phase current phase angle difference is 120 °, non-negative sequence current, non-zero-sequence current; When single-phase fuse blows takes place in the high-pressure side, for example: high-pressure side A insures mutually and falls, low-pressure side A, B phase current size are equal substantially, phase place is identical, C phase current size is A, B phase current two times, and phase place is opposite, and produces negative-sequence current, after the delay time that process is set is confirmed single-phase phase shortage, saltus step depressor low-pressure side circuit breaker; The present invention adopts negative-sequence current to start protection component, which is distinguished by each phase current of differentiation low tension source and breaks mutually;
2. the two-phase phase shortage is differentiated: when the high-pressure side circuit is short-circuited fault, cause the two-phase phase shortage, after the fuse blows, transformer can not be sent load, and each phase current is very little; Close the position when low-side switch is in, the low-pressure side three-phase current is all less than 2*I
KZBehind delay confirmation, can alarm or move in tripping operation; I
KZBe the no-load transformer electric current;
3. the three-phase phase shortage is differentiated: distinguishing rule is differentiated with the two-phase phase shortage;
4. low-pressure side phase shortage: after the low-pressure side phase shortage, produce negative-sequence current and zero-sequence current,, confirm open-phase fault, saltus step depressor low-pressure side circuit breaker through behind the delay time;
5. overload alarm: when any phase current of low-pressure side greater than the overload current ration, behind the overload delay time, send out alarm signal.
Different faults situation when the present invention can differentiate the high-pressure side of step-up transformer and low-pressure side generation phase-deficient operation is different from general generator open-phase protection, all can show by message for different failure conditions, is convenient to carry out accident analysis; Device of the present invention has RS485 interface, CAN bus interface (apolegamy), supports IEC60870-5-103, Modbus agreement; Can with wind energy turbine set supervisory control system interface.
The invention has the beneficial effects as follows: the present invention is applicable to that the American case of excision wind energy turbine set 35kV becomes the phase-deficient operation fault of high-pressure side and low-pressure side; integrated protection; control; functions such as measurement and Stateful Inspection; have transformer high-voltage side and low-pressure side open-phase protection; the low-pressure side overcurrent protection; overvoltage; under voltage protection and overload alarm function; prevent that step-up transformer high pressure (35kV) side from influencing wind-driven generator because of fuse blows; the present invention collects protection; measure; function one such as control and status monitoring; be furnished with communication interface, and compact conformation; reduce installing space.
Description of drawings:
Fig. 1 is the structural representation of the embodiment of the invention;
Embodiment:
Below in conjunction with accompanying drawing, the invention will be further described by embodiment.
With reference to accompanying drawing 1; a kind of wind energy turbine set American box transformer phase-lacking protective device of 35kV; comprise central processing unit, electric current input module, voltage input module, non electrical quantity and switching input module, analog-to-digital conversion module, photoelectric isolation module, human-computer interaction module, control output module; electric current input module, voltage input module connect central processing unit by analog-to-digital conversion module; non electrical quantity and switching input module connect central processing unit by photoelectric isolation module, connect central processing unit junctor interactive module, control output module.
A kind of wind energy turbine set American box transformer phase-lacking protective method of 35kV; by current transformer in the circuit breaker and zero-sequence transformer; to calculate the magnitude of current by central processing unit after the needed current signal collection; as main dish certificate; the assistant criteria voltage is directly from the system acquisition union; non electrical quantity and switching value are handed over the central processing unit collection after photoelectricity is isolated, judge that wind energy turbine set becomes scarce state with the American case of 35kV, and the control output module is according to condition automatic or manual output result of determination.
Open-phase protection of the present invention, the output result action in wind power plant, influences wind-driven generator for preventing the step-up transformer high-pressure side because of fuse blows in signal or move in tripping operation.
In an embodiment, troubleshooting process of the present invention:
A. the single-phase phase shortage in high-pressure side:
35KV high-pressure side output breaks down, and causes certain phase fuse blows, produces single-phase phase shortage, and the current transformer place in circuit breaker can produce electric current and change, and electric current calculates negative-sequence current I through gathering and computing
2, work as I
2I
2dz(I
2dzThe negative-sequence current of setting starts definite value) time, start single-phase open-phase fault handling process, single-phase voltage value relatively at this moment, if all greater than 620V(0.9 rated voltage doubly), enter time-delay T(T time definite value), if T in the time above-mentioned two conditions all no longer satisfied, then withdraw from flow process, return normal condition; All can satisfy in the T time as above-mentioned two conditions, then finish the tripping operation action; If what this protection was selected is to move in signal, then send alarm signal, be failure to actuate in tripping operation.
B. the above phase shortage of high-pressure side two-phase:
Become the high-pressure side owing to boost and adopt angle-type scheme, when breaking more than the two-phase of 35KV high-pressure side, step-up transformer is in Light Condition, low-tension supply 690V side is very little by the three-phase current of circuit breaker, close the position when circuit breaker is in, three-phase voltage is all greater than 620V, and its three-phase current is all less than 2*I
KZBehind delay confirmation, can alarm or move in tripping operation; I
KZBe the no-load transformer electric current.
C. low-pressure side phase shortage:
When being at circuit breaker when closing, transformer is star-like to bring out existing monophase current less than 2*I
KZ, corresponding simultaneously single-phase specified 690V voltage can be judged as this phase low-pressure side phase shortage less than 69V, action and alarm.
D. low-pressure side overcurrent protection:
In the low-pressure side of transformer, the monophase current by circuit breaker with corresponding overcurrent definite value relatively, when it surpasses the overcurrent definite value, starts delay confirmation after gathering computing, by finishing the tripping operation action behind the delay confirmation.
E. overload alarm:
In the low-pressure side of transformer, the monophase current by circuit breaker with the overload definite value relatively, when it surpasses the overload definite value, starts delay confirmation after gathering computing, can finish the tripping operation action by behind the delay confirmation, also can move in alarm.
Claims (6)
1. a wind energy turbine set is with the American box transformer phase-lacking protective device of 35kV; it is characterized in that comprising central processing unit, electric current input module, voltage input module, non electrical quantity and switching input module, analog-to-digital conversion module, photoelectric isolation module, human-computer interaction module, control output module; electric current input module, voltage input module connect central processing unit by analog-to-digital conversion module; non electrical quantity and switching input module connect central processing unit by photoelectric isolation module, connect central processing unit junctor interactive module, control output module.
2. the wind energy turbine set 35kV American box transformer phase-lacking protective device according to claim 1 is characterized in that the present invention has RS485 interface, CAN bus interface (apolegamy), supports IEC60870-5-103, Modbus agreement; Can with wind energy turbine set supervisory control system interface.
3. a wind energy turbine set is with the American box transformer phase-lacking protective method of 35kV; it is characterized in that by current transformer in the circuit breaker and zero-sequence transformer; to calculate the magnitude of current by central processing unit after the needed current signal collection; as main dish certificate; the assistant criteria voltage is directly from the system acquisition union; non electrical quantity and switching value are handed over the central processing unit collection after photoelectricity is isolated; judge that wind energy turbine set becomes scarce state with the American case of 35kV, the control output module is according to condition automatic or manual output result of determination.
4. the wind energy turbine set 35kV American box transformer phase-lacking protective method according to claim 3; it is characterized in that open-phase protection of the present invention; the output result action in wind power plant, influences wind-driven generator for preventing the step-up transformer high-pressure side because of fuse blows in signal or move in tripping operation.
5. according to claim 3 or the 4 described wind energy turbine set American box transformer phase-lacking protective methods of 35kV, it is characterized in that said judgement wind energy turbine set becomes scarce state with the American case of 35kV and is divided into: 1. single-phase phase shortage is differentiated; 2. the two-phase phase shortage is differentiated; 3. the three-phase phase shortage is differentiated; 4. low-pressure side phase shortage; 5. overload alarm.
6. the wind energy turbine set 35kV American box transformer phase-lacking protective method according to claim 5, it is as follows to it is characterized in that concrete phase shortage is differentiated process:
1. single-phase phase shortage is differentiated: low pressure (0.69kV) side three-phase current is all less than maximum load current, and harmonic current components is little, and fuse blows takes place high pressure (35kV) side any mutually, causes the three-phase current size and the phase place of low-pressure side to change; The size and the phase place of high-pressure side secondary current also change thereupon; Low-pressure side is a positive phase sequence before the open-phase fault, and the three-phase current phase angle difference is 120 °, non-negative sequence current, non-zero-sequence current; When single-phase fuse blows takes place in the high-pressure side, for example: high-pressure side A insures mutually and falls, low-pressure side A, B phase current size are equal substantially, phase place is identical, C phase current size is A, B phase current two times, and phase place is opposite, and produces negative-sequence current, after the delay time that process is set is confirmed single-phase phase shortage, saltus step depressor low-pressure side circuit breaker; The present invention adopts negative-sequence current to start protection component, which is distinguished by each phase current of differentiation low tension source and breaks mutually;
2. the two-phase phase shortage is differentiated: when the high-pressure side circuit is short-circuited fault, cause the two-phase phase shortage, after the fuse blows, transformer can not be sent load, and each phase current is very little; Close the position when low-side switch is in, the low-pressure side three-phase current is all less than 2*I
KZBehind delay confirmation, can alarm or move in tripping operation; I
KZBe the no-load transformer electric current;
3. the three-phase phase shortage is differentiated: distinguishing rule is differentiated with the two-phase phase shortage;
4. low-pressure side phase shortage: after the low-pressure side phase shortage, produce negative-sequence current and zero-sequence current,, confirm open-phase fault, saltus step depressor low-pressure side circuit breaker through behind the delay time;
5. overload alarm: when any phase current of low-pressure side greater than the overload current ration, behind the overload delay time, send out alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110095996 CN102244380B (en) | 2010-12-22 | 2011-04-18 | Open-phase protection method and device of 35kV American box-type substation for wind power station |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010600274.6 | 2010-12-22 | ||
| CN201010600274 | 2010-12-22 | ||
| CN 201110095996 CN102244380B (en) | 2010-12-22 | 2011-04-18 | Open-phase protection method and device of 35kV American box-type substation for wind power station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102244380A true CN102244380A (en) | 2011-11-16 |
| CN102244380B CN102244380B (en) | 2013-09-11 |
Family
ID=44962296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110095996 Expired - Fee Related CN102244380B (en) | 2010-12-22 | 2011-04-18 | Open-phase protection method and device of 35kV American box-type substation for wind power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102244380B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868230A (en) * | 2012-10-17 | 2013-01-09 | 河南省电力公司驻马店供电公司 | Intelligent managing device for condition based maintenance of 10-20kv transformer |
| CN102868229A (en) * | 2012-10-17 | 2013-01-09 | 河南省电力公司驻马店供电公司 | Intelligent management command system for state maintenance of power distribution network equipment |
| CN105572535A (en) * | 2015-12-30 | 2016-05-11 | 北京天诚同创电气有限公司 | Monitoring method, monitoring device and monitoring system of step-up transformer |
| CN106159901A (en) * | 2016-08-19 | 2016-11-23 | 宝亨新电气（集团）有限公司 | A kind of phase-lacking protective device of combined transformer |
| CN106786419A (en) * | 2016-12-21 | 2017-05-31 | 华北电力大学 | Wind power plant based on station domain protection philosophy collects system relay protection method |
| CN107039958A (en) * | 2017-06-09 | 2017-08-11 | 云南电力试验研究院(集团)有限公司 | The protection system to earth and method of a kind of wind power plant box type transformer low-pressure system |
| CN105589008B (en) * | 2014-11-18 | 2019-02-19 | 德信东源电力技术服务（北京）有限公司 | Open phase fault detection method and device |
| CN109490686A (en) * | 2018-10-31 | 2019-03-19 | 苏州热工研究院有限公司 | Nuclear power plant's power transmission and transforming equipment open phase detection method and system |
| CN113777964A (en) * | 2021-09-15 | 2021-12-10 | 智慧(如皋)高压开关有限公司 | Intelligent controller |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6496012B1 (en) * | 2000-09-22 | 2002-12-17 | Koninklijke Philips Electronics, N.V. | Apparatus and method for detecting a short circuit in a lighting system |
| CN1632996A (en) * | 2004-12-22 | 2005-06-29 | 刘建南 | An intelligent transformer operating and controlling device and its use |
-
2011
- 2011-04-18 CN CN 201110095996 patent/CN102244380B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6496012B1 (en) * | 2000-09-22 | 2002-12-17 | Koninklijke Philips Electronics, N.V. | Apparatus and method for detecting a short circuit in a lighting system |
| CN1632996A (en) * | 2004-12-22 | 2005-06-29 | 刘建南 | An intelligent transformer operating and controlling device and its use |
Non-Patent Citations (1)
| Title |
|---|
| 屈刚等: "配电变压器非全相运行时各侧相量分析", 《华中电力》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868230A (en) * | 2012-10-17 | 2013-01-09 | 河南省电力公司驻马店供电公司 | Intelligent managing device for condition based maintenance of 10-20kv transformer |
| CN102868229A (en) * | 2012-10-17 | 2013-01-09 | 河南省电力公司驻马店供电公司 | Intelligent management command system for state maintenance of power distribution network equipment |
| CN105589008B (en) * | 2014-11-18 | 2019-02-19 | 德信东源电力技术服务（北京）有限公司 | Open phase fault detection method and device |
| CN105572535A (en) * | 2015-12-30 | 2016-05-11 | 北京天诚同创电气有限公司 | Monitoring method, monitoring device and monitoring system of step-up transformer |
| CN106159901A (en) * | 2016-08-19 | 2016-11-23 | 宝亨新电气（集团）有限公司 | A kind of phase-lacking protective device of combined transformer |
| CN106786419A (en) * | 2016-12-21 | 2017-05-31 | 华北电力大学 | Wind power plant based on station domain protection philosophy collects system relay protection method |
| CN107039958A (en) * | 2017-06-09 | 2017-08-11 | 云南电力试验研究院(集团)有限公司 | The protection system to earth and method of a kind of wind power plant box type transformer low-pressure system |
| CN107039958B (en) * | 2017-06-09 | 2019-11-01 | 云南电力试验研究院(集团)有限公司 | A kind of protection system to earth and method of wind power plant box type transformer low-pressure system |
| CN109490686A (en) * | 2018-10-31 | 2019-03-19 | 苏州热工研究院有限公司 | Nuclear power plant's power transmission and transforming equipment open phase detection method and system |
| CN113777964A (en) * | 2021-09-15 | 2021-12-10 | 智慧(如皋)高压开关有限公司 | Intelligent controller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102244380B (en) | 2013-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102244380B (en) | Open-phase protection method and device of 35kV American box-type substation for wind power station | |
| CN103124068B (en) | A kind of anti-island protect system of distributed power generation grid-connected system and guard method thereof | |
| CN101936258A (en) | A wind power plant predictive protection circuit | |
| CN203747436U (en) | Distributed photovoltaic power generation access system | |
| CN202586308U (en) | Comprehensive grounding protective device for microcomputer | |
| CN202127283U (en) | Circuit backup power automatic switching protection device | |
| CN112271698A (en) | Comprehensive protection system and method for power collection line and box transformer substation of wind power plant | |
| Li et al. | Analysis of directional pilot protection on transmission line with wind farm integration | |
| CN207518284U (en) | A kind of accident disconnection device of small power incorporating into power network | |
| CN107039958B (en) | A kind of protection system to earth and method of wind power plant box type transformer low-pressure system | |
| CN107732971A (en) | A kind of band bidirectional current protection distributed grid-connected access case | |
| Louro et al. | Network islanding—A real event | |
| Rezaei et al. | A Novel Differential-based Protection Scheme for Intertie Zone of Large-Scale Centralized DFIG Wind Farms | |
| Comech et al. | Protection in distributed generation | |
| CN112865034A (en) | Selective relay protection configuration method | |
| CN108183464A (en) | A kind of judgement system and method for generator start and stop protection automatic switching | |
| CN206947938U (en) | A kind of protection system to earth of wind power plant box type transformer low-pressure system | |
| Zhang et al. | Configuration, cooperation and existing problems of wind farm relay protection | |
| CN2397599Y (en) | Double system relay protector for distribution equipment | |
| Gajić et al. | Integrated protection scheme for pump-storage hydroelectric power plant | |
| CN209217702U (en) | Breaker fail protection module in arc light protective device | |
| Liu et al. | Research on the process of power flow transferring and its identification method | |
| CN213125593U (en) | Automatic switch for small hydropower line | |
| CN216851313U (en) | Wind-powered electricity generation field current collection circuit of circuit breaker converges system on area post | |
| Foss et al. | Design and implementation of an anti-islanding protection strategy for distributed generation involving multiple passive protections |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130911 Termination date: 20160418 |