CN106712078A - Monitoring and control method for photovoltaic power generation island operations of low-voltage transformer area - Google Patents

Monitoring and control method for photovoltaic power generation island operations of low-voltage transformer area Download PDF

Info

Publication number
CN106712078A
CN106712078A CN201611118692.5A CN201611118692A CN106712078A CN 106712078 A CN106712078 A CN 106712078A CN 201611118692 A CN201611118692 A CN 201611118692A CN 106712078 A CN106712078 A CN 106712078A
Authority
CN
China
Prior art keywords
islanding
modulation
low
monitoring
signal
Prior art date
Application number
CN201611118692.5A
Other languages
Chinese (zh)
Inventor
许杏桃
杨恒章
李然
严程伟
黄昕
黄文静
李静
丁勇
Original Assignee
国网江苏省电力公司镇江供电公司
江苏安方电力科技有限公司
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 国网江苏省电力公司镇江供电公司, 江苏安方电力科技有限公司 filed Critical 国网江苏省电力公司镇江供电公司
Priority to CN201611118692.5A priority Critical patent/CN106712078A/en
Publication of CN106712078A publication Critical patent/CN106712078A/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/382Dispersed generators the generators exploiting renewable energy
    • H02J3/383Solar energy, e.g. photovoltaic energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/388Islanding, i.e. disconnection of local power supply from the network
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Abstract

The invention relates to the technical field of power monitoring, and specifically relates to a monitoring and control method for photovoltaic power generation island operations of a low-voltage transformer area. The method is characterized in that a photovoltaic power generation user required to be monitored is equipped with an anti-islanding device A, an anti-islanding device B is installed at an outgoing line side of the low-voltage transformer area, the anti-islanding device A has a function of receiving modulation and demodulation signals, the anti-islanding device B has a function of sending modulation and demodulation signals, and the anti-islanding device A can receive the modulation and demodulation signals sent by the anti-islanding device B. By adopting the technical scheme disclosed by the invention, effective monitoring and control isolation for photovoltaic power generation island operations of the low-voltage transformer area can be effectively realized.

Description

A kind of low-voltage platform area photovoltaic generation islet operation detects control method
Technical field
It is a kind of low-voltage platform area photovoltaic generation islet operation specifically the present invention relates to electric power monitoring technical field Monitoring and control method.
Background technology
Power distribution network is in the end of power system, with Regional Distribution it is wide, power network scale is big, device category is more, network company Connect the distinguishing features such as the various, method of operation is changeable.With the growth of Urbanization Construction and need for electricity, power distribution network is always continuous Ground transformation and enlarging, its scale also constantly expand, and the scale of most of power distribution networks above county level has all reached in state's net Corporation system To more than hundred feeder lines, in some, the middle pressure feeder line of large size city met or exceeded thousand.
With continuing to develop for power system, long distance transmission line is more and more, and being accurately positioned for line fault point is outstanding For important.When low-voltage platform area is short-circuited failure, many, the wide characteristic of line length is put because ground condition in mountain area is complicated, excluding event More manpower and larger workload are needed during barrier, the service restoration time of faulty line is directly affected, is also run to circuit and tieed up Shield personnel bring heavy burden.
A kind of station user identification apparatus are provided in the prior art, including installed in the low voltage outlet terminals of transformer to be measured On main frame, and after being attempted by and there is pulse current on the low-pressure line-outgoing end of the user terminal transformer of power line, to detecting There is the bus injected carrier signal of pulse current;Handheld terminal is used for after pulse current is produced, and receives carrier signal, and root The platform area information of the user of terminal unit and separate is determined and connect according to the carrier signal for receiving.Platform area of the present invention identifier is used The method that pulse current method and FSK power carrier signal methods are combined carries out the identification of platform area, it is ensured that adjacent stations become altogether high pressure, Altogether, the identification of platform area can be accurately carried out in the case of cable duct altogether, for the circuit of distance serious interference, power carrier letter Number possibly cannot transmit, even if such case pulse current also can recognize that, but its pulsed current signal shortcoming be can only be at end End transmission signal, transformer terminal detection, complex operation, controllability is poor in addition, is easily damaged equipment, and ammeter to carrier wave Signal attenuation is very big, and signal is serious to the loss of ammeter rear end.Transformer can not isolate out carrier signal, and signal can be by becoming It is coupled to another transformer in depressor high-pressure side so that the identification of platform area is inaccurate.
The content of the invention
In order to solve the above-mentioned technical problem, the invention discloses a kind of monitoring of low-voltage platform area photovoltaic generation islet operation with Control method, concrete technical scheme is as follows:
A kind of monitoring of low-voltage platform area photovoltaic generation islet operation and control method, it would be desirable to the photovoltaic generation user installation of monitoring Anti-islanding device A, in low-voltage platform area, total outgoing line side installs anti-islanding device B, and there is anti-islanding device A modulation-demodulation signal to receive Function, anti-islanding device B has modulation-demodulation signal sending function, and anti-islanding device A can receive anti-islanding device B transmissions Modulation-demodulation signal.
Further improvement of the present invention, anti-islanding device A is main to be believed by Cortex-M3 high-performance treatments core, modulation /demodulation Number receiver module, GPS module, GPRS module and human-computer interface module composition.
Further improvement of the present invention, anti-islanding device B is main to be believed by Cortex-M3 high-performance treatments core, modulation /demodulation Number sending module, GPS module, GPRS module and human-computer interface module composition, anti-islanding device B send tune simultaneously using Dual module Demodulated signal pattern processed.
Specific workflow of the invention, the exit potential of anti-islanding device B collections distribution low-voltage side, when collection voltages very It is small near zero when, judge the distribution transforming be in island operation state, anti-islanding device B stop send modulation-demodulation signal, otherwise, Anti-islanding device B is continual to send modulation-demodulation signal on the line;Anti-islanding device A receives anti-islanding device B and sends Modulation-demodulation signal, when normally receiving signal, assert the distribution transforming be in normal condition, when anti-islanding device A is not received During signal, assert that the distribution transforming is in island operation state, now, anti-islanding device A is by photovoltaic generation user and net side switch is disconnected Open, when anti-islanding device A from do not receive signal to can receive signal when, assert that the distribution transforming is no longer on islet operation shape State, now, anti-islanding device A is by photovoltaic generation user and net side switchs closure.
Beneficial effects of the present invention:Low-voltage platform area photovoltaic generation can effectively be realized using the technical scheme of present disclosure Effective monitoring of islet operation is isolated with control.
Brief description of the drawings
Fig. 1 is the structural representation of anti-islanding device A.
Fig. 2 is the structural representation of anti-islanding device B.
Specific embodiment
In order to deepen the understanding of the present invention, the present invention is done below in conjunction with drawings and Examples is further retouched in detail State, the embodiment is only used for explaining the present invention, protection scope of the present invention is not constituted and is limited.
Embodiment, a kind of monitoring of low-voltage platform area photovoltaic generation islet operation and control method, it would be desirable to the photovoltaic of monitoring Generating user installation anti-islanding device A, in low-voltage platform area, total outgoing line side installs anti-islanding device B, and anti-islanding device A has modulation Demodulated signal receive capabilities, anti-islanding device B has modulation-demodulation signal sending function, and anti-islanding device A can receive anti-orphan The modulation-demodulation signal that island device B sends.
As shown in figure 1, anti-islanding device A is main to receive mould by Cortex-M3 high-performance treatments core, modulation-demodulation signal Block, GPS module, GPRS module and human-computer interface module composition.
As shown in Fig. 2 anti-islanding device B is main to send mould by Cortex-M3 high-performance treatments core, modulation-demodulation signal Block, GPS module, GPRS module and human-computer interface module composition, anti-islanding device B send modulation /demodulation letter using Dual module simultaneously Number pattern.
Specific workflow of the invention, the exit potential of anti-islanding device B collections distribution low-voltage side, when collection voltages very It is small near zero when, judge the distribution transforming be in island operation state, anti-islanding device B stop send modulation-demodulation signal, otherwise, Anti-islanding device B is continual to send modulation-demodulation signal on the line;Anti-islanding device A receives anti-islanding device B and sends Modulation-demodulation signal, when normally receiving signal, assert the distribution transforming be in normal condition, when anti-islanding device A is not received During signal, assert that the distribution transforming is in island operation state, now, anti-islanding device A is by photovoltaic generation user and net side switch is disconnected Open, when anti-islanding device A from do not receive signal to can receive signal when, assert that the distribution transforming is no longer on islet operation shape State, now, anti-islanding device A is by photovoltaic generation user and net side switchs closure.
General principle of the invention, principal character and advantage has been shown and described above.The technical staff of the industry should Understand, the present invention is not limited to the above embodiments, simply original of the invention is illustrated described in above-described embodiment and specification Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements All fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appending claims and its equivalent circle. It is fixed.

Claims (5)

1. a kind of monitoring of low-voltage platform area photovoltaic generation islet operation and control method, it is characterised in that the light of monitoring will be needed Volt generating user installation anti-islanding device A, in low-voltage platform area, total outgoing line side installs anti-islanding device B, the anti-islanding device A tools There are modulation-demodulation signal receive capabilities, the anti-islanding device B has modulation-demodulation signal sending function, the anti-islanding device A can receive the modulation-demodulation signal that the anti-islanding device B sends.
2. the monitoring of photovoltaic generation islet operation in low-voltage platform area according to claim 1 and control method, it is characterised in that The anti-islanding device A is main by Cortex-M3 high-performance treatments core, modulation-demodulation signal receiver module, GPS module, GPRS Module and human-computer interface module are constituted.
3. the monitoring of photovoltaic generation islet operation in low-voltage platform area according to claim 2 and control method, it is characterised in that The anti-islanding device B is main by Cortex-M3 high-performance treatments core, modulation-demodulation signal sending module, GPS module, GPRS Module and human-computer interface module are constituted.
4. the monitoring of photovoltaic generation islet operation in low-voltage platform area according to claim 3 and control method, it is characterised in that The anti-islanding device B sends modulation-demodulation signal pattern simultaneously using Dual module.
5. the monitoring of the low-voltage platform area photovoltaic generation islet operation according to claim any one of 1-4 and control method, its It is characterised by that the exit potential of the anti-islanding device B collection distribution low-voltages side, when collection voltages very little is near zero, is sentenced The fixed distribution transforming is in island operation state, and the anti-islanding device B stops sending modulation-demodulation signal, otherwise, anti-islanding device B It is continual to send modulation-demodulation signal on the line;The anti-islanding device A receives the tune that the anti-islanding device B sends Demodulated signal processed, when normally receiving signal, assert that the distribution transforming is in normal condition, when anti-islanding device A does not receive signal When, assert that the distribution transforming is in island operation state, now, by photovoltaic generation user, simultaneously net side is switched off anti-islanding device A, when Anti-islanding device A from do not receive signal to can receive signal when, assert that the distribution transforming is no longer on island operation state, this When, anti-islanding device A is by photovoltaic generation user and net side switchs closure.
CN201611118692.5A 2016-12-08 2016-12-08 Monitoring and control method for photovoltaic power generation island operations of low-voltage transformer area CN106712078A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611118692.5A CN106712078A (en) 2016-12-08 2016-12-08 Monitoring and control method for photovoltaic power generation island operations of low-voltage transformer area

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611118692.5A CN106712078A (en) 2016-12-08 2016-12-08 Monitoring and control method for photovoltaic power generation island operations of low-voltage transformer area

Publications (1)

Publication Number Publication Date
CN106712078A true CN106712078A (en) 2017-05-24

Family

ID=58936232

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611118692.5A CN106712078A (en) 2016-12-08 2016-12-08 Monitoring and control method for photovoltaic power generation island operations of low-voltage transformer area

Country Status (1)

Country Link
CN (1) CN106712078A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102005742A (en) * 2010-11-17 2011-04-06 中国电力科学研究院 Distributed power generation island detection system and method based on power frequency carrier wave
CN103124068A (en) * 2013-01-31 2013-05-29 中国电力科学研究院 Anti-islanding protection system for distributed grid-connected system and protection method of anti-islanding protection system
CN104795838A (en) * 2015-04-24 2015-07-22 国家电网公司 Intelligent anti-islanding device and automatic islanding detecting and destroying method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102005742A (en) * 2010-11-17 2011-04-06 中国电力科学研究院 Distributed power generation island detection system and method based on power frequency carrier wave
CN103124068A (en) * 2013-01-31 2013-05-29 中国电力科学研究院 Anti-islanding protection system for distributed grid-connected system and protection method of anti-islanding protection system
CN104795838A (en) * 2015-04-24 2015-07-22 国家电网公司 Intelligent anti-islanding device and automatic islanding detecting and destroying method

Similar Documents

Publication Publication Date Title
CN100353642C (en) Method and device of realizing hot plug for power distribution singleboard
CN105988063B (en) A kind of comprehensive on-line monitoring method of transmission line malfunction hidden danger and device
CN201637791U (en) Online monitoring system for high-voltage shunt capacitor
CN103293443B (en) A kind of distribution network overhead line Earth design method
CN105866615A (en) 10kV power distribution line disconnection fault judging method based on three-phase voltage current
CN201352239Y (en) Distribution room user identifier
CN105093061A (en) Power distribution network line fault on-line monitoring and alarming system
CN201229389Y (en) Cable sheath insulation on-line monitoring device
CN105093033A (en) Power grid multi-source information-based fault integrated analysis system and analysis method
CN205665347U (en) 10kV distribution lines broken string fault detection and positioning system based on three phase voltage electric current
CN203870191U (en) Low-voltage line fault locating terminal of power distribution area
CN102707190A (en) Direct-current-side short-circuit fault distance measuring device and method of metro tractive power supply system
CN105896470A (en) Double loop network-based protection device free of main in-situ transformer and protection method
CN107968850A (en) The taiwan area identifying system and method for power line carrier
CN204389628U (en) A kind of electric network fault automatic positioning equipment based on Multi-information acquisition
CN105069697A (en) Intelligent transformer station maintenance strategy automatic identification system and method
CN102768330A (en) System and device for detecting defects in underground cables
CN102064537B (en) Method for judging and processing single-phase earth faults by using electronic mutual inductor
CN103135038A (en) Alternative current electric crosstalk and insulation fault monitoring line selection method of direct current system
CN102435871A (en) On-line monitoring system for data collection of electric arresters based on GPS (Global Positioning System) synchronization
CN102879667A (en) Lightning protection device on-line remote monitoring recorder
CN103592563A (en) Direct current system insulation on-line monitoring device
CN101738565B (en) Adaptive fault indicator
CN105527540B (en) A kind of fault detector and the matched overhead distribution network fault positioning method of distributed intelligent terminal
CN102521944B (en) A kind of method of high-tension electricity equipment non-contact intelligent early warning and early warning system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20170524