CN101944764A - Thyristor forced commutation-based double-loop power supply switching device - Google Patents
Thyristor forced commutation-based double-loop power supply switching device Download PDFInfo
- Publication number
- CN101944764A CN101944764A CN2009101578111A CN200910157811A CN101944764A CN 101944764 A CN101944764 A CN 101944764A CN 2009101578111 A CN2009101578111 A CN 2009101578111A CN 200910157811 A CN200910157811 A CN 200910157811A CN 101944764 A CN101944764 A CN 101944764A
- Authority
- CN
- China
- Prior art keywords
- power supply
- thyristor
- main
- stand
- power source
- 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.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention discloses thyristor device forced commutation control method-based power equipment used for quickly switching a double-loop power supply of a power supply system. The power equipment comprises a detecting unit (1), a calculation and judgment detecting unit (2), a triggering unit (3) and a working power supply (4), and the key point is that a main switching circuit (5) is connected with the detecting unit (1) and the triggering unit (3) respectively and is also connected with a main power supply (6), a backup power supply (7) and a load (8). The power equipment has the advantages of simple structure, high reliability, low loss, low manufacturing cost, no influence on the known sensitive loads and capacity of positively improving the reliability, the power quality and the power supply and utilization environment of the power supply system.
Description
Technical field:
Patent of the present invention relates to a kind of power equipment, specifically is meant a kind of quick power equipment that switches of double loop power supply that is used for electric power system based on thyristor device forced commutation control method.
Background technology:
Development along with informationization technology, modern society improves day by day to the requirement of power supply quality, the high quality power supply has become the production line that modern society produces, life is smooth, the primary condition of stable development drives based on system controlled by computer, frequency control, these modern societies typical case such as the financial system of Network Basedization using electricity system, even if of short duration power failure or other power quality problems just can cause economic loss difficult to the appraisal.Yet because apparatus factor, management factors and the natural cause that is difficult to resist, other power quality problems such as power failure, voltage dip still serious threat the high-quality power supply.The statistics of U.S.'s DianKeYuan shows: the economic loss that U.S. every year causes because of power quality problem is between 15,000,000,000 to 24,000,000,000 dollars.China's economic development is along with national product, living standard improve constantly, the introduction and the employing of novel automatic production line, networked services system, and the user more and more pays close attention to the quality problems of supply of electric power.Supply of electric power enters the new stage of stressing quality stage and benefit from the quantity in past.The quality of power supply has become the restraining factors of capital introduction, developing industry.Along with joining of China WTO, the development of Chinese production and processing industries, national product, life more are tending towards internationalization, and power supply quality also will be tending towards international standard.Therefore, the research of China's high-quality power supply technique has more urgency and challenge with corresponding product development and application.
The solution of power quality problem is usually relevant with the power quality problem ability to bear of Electric Power Network Planning and operation, equipment, quality of power supply adjusting measure etc.People have carried out many fruitful work in these areas.The general supply power mode of power consumers such as becoming the industrial enterprise of outbalance, municipal administration, commerce and trade, building supplies power with double circuit.When one road power supply breaks down, put into operation in another road, improves the reliability of power supply.Supply power with double circuit at present and switch the main prepared auto restart mode that adopts based on mechanical switch, mechanical switch exists the time-delay of switching process big, the problem of very flexible, and switching time is at least more than 1 second, the continuous power supply of sensitive load can't be guaranteed, the effect of supplying power with double circuit can not be given full play to.The thuristor throw-in and throw-off mode is the quick switching mode that progressively comes into one's own in recent years.It is strong that thyristor has a power handling capability, the characteristics that cost is low.But thyristor belongs to the half control device, for avoiding forming circulation between the two-way power supply, must wait the thyristor current flows natural zero-crossing pass of pending fault road power supply correspondence to have no progeny, and just can drop into normal road power supply.Prolonged switching time greatly, representative value reaches more than the 20ms, and the power supply continuity of many sensitive loads also can't guarantee.
Summary of the invention:
Goal of the invention of the present invention is to disclose a kind of power equipment that switches fast based on the double loop power supply that is used for electric power system of thyristor device forced commutation control method.
Realize that main circuit technical scheme of the present invention is as follows: comprise detecting unit, calculating and judgement detecting unit, trigger element and working power, key is that main commutation circuit is connected with trigger element with detecting unit respectively, and main commutation circuit also is connected with main power source, stand-by power supply and load.
Described main commutation circuit is by main power source thyristor module TP and stand-by power supply side thyristor module TA series connection, above-mentioned main power source thyristor module TP and stand-by power supply side thyristor module TA constitute by three thyristor unit are in parallel, correspondingly connect the three-phase of main power source and the three-phase of stand-by power supply, each above-mentioned thyristor unit is made of a pair of anti-parallel thyristor, and load is connected with stand-by power supply side thyristor module TA with main power source thyristor module TP.
Described bypass machinery switch P b and Ab are in parallel with thyristor module TP and TA respectively.
Described isolating switch M1p is connected with main power source thyristor module TP two ends with M2p, and isolating switch M1a is connected with stand-by power supply side thyristor module TA two ends with M2a, and isolating switch M2p is connected with isolating switch M2a.
The electric current of described thyristor is 2～3 times of rated current of load, and voltage is the twice of rated voltage.
Characteristics such as that the present invention has is simple in structure, reliability is high, loss is little, and cost is low constitute switching device shifter in conjunction with control device and auxiliary circuit.Fall existence temporarily though still have in the handoff procedure, time restriction can not impact known sensitive load below 10ms.Certainly, there is harm to fall temporarily simultaneously for double loop power supply or during power failure, can't guarantees continuous power supply load.To single time power supply reliability is 99.9% electric power system, can rise to 99.9999%, on average occurs 10 times falling temporarily of harm arranged single time power supply is annual, can reduce to 3 years and take place once.Thereby the improvement of applying reliability, the quality of power supply and the confession power utilization environment that will give electric power system of the present invention brings positive variation.
Description of drawings:
Fig. 1 is a whole theory diagram of the present invention.
Fig. 2 is the schematic diagram of the main commutation circuit among Fig. 1.
Embodiment:
See also Fig. 1～Fig. 2, specific embodiments of the invention are as follows: comprise detecting unit 1, calculate and judge detecting unit 2, trigger element 3 and working power 4, key is that main commutation circuit 5 is connected with trigger element 3 with detecting unit 1 respectively, and main commutation circuit 5 also is connected with main power source 6, stand-by power supply 7 and load 8; Above-mentioned detecting unit 1, calculating and judgement detecting unit 2, trigger element 3 and working power 4 are prior art, 1 couple of main power source abc of detecting unit three-phase voltage instantaneous value carries out the dq conversion, through the non-DC component of low pass filter filters out, then signal is transferred to calculate and judge and reaches the dq coordinate corresponding voltage value V that all square computing obtains conversion main power source 6 by quadratic sum by detecting unit 2
Dq, with V
DqBear limit value with the voltage dip of sensitive loads 8 and compare, if V
DqGreater than the limit value that bears of load 8, sensitive loads 8 can normally be moved so, and voltage detection unit 1 does not send switching command; If V
DqLess than the restriction of bearing of load 8, and stand-by power supply just often, and voltage detection unit 1 should send instruction immediately, carries out the switching operation, gives sensitive loads 8 power supplies by the good stand-by power supply of quality of voltage; Above-mentioned main commutation circuit 5 is by main power source thyristor module TP and stand-by power supply side thyristor module TA series connection, above-mentioned main power source thyristor module TP and stand-by power supply side thyristor module TA constitute by three thyristor unit are in parallel, correspondingly connect the three-phase of main power source 6 and the three-phase of stand-by power supply 7, each above-mentioned thyristor unit is made of a pair of anti-parallel thyristor, and load 8 is connected with stand-by power supply side thyristor module TA with main power source thyristor module TP; Above-mentioned main commutation circuit 5 control signals are at first blocked the gate pole control signal of thyristor module TP, terminal voltage Eps polarity according to thyristor PP/PN, trigger stand-by power supply side thyristor AP or AN, if Eps is greater than zero, illustrate that electric current is to flow to load 8 by power supply, thyristor PP flows through, trigger thyristor AP this moment, after triggering thyristor AP, if the instantaneous value of backup power source voltage is higher than main power source, leading so, can be applied in a reverse voltage under the stand-by power supply acting in conjunction on the thyristor PP, force the electric current among the thyristor PP to reduce, promptly mean and shortened switching time; Electric current in thyristor PP1 is reduced to zero, when main power source is disconnected, triggers thyristor AN, finishes the handoff procedure of load 8; If aforesaid Eps is less than zero the time, illustrate that electric current is to power supply by load flow, thyristor PN flows through, trigger thyristor AN this moment, after triggering thyristor AN, if the instantaneous value of backup power source voltage is lower than main power source, leading so, can be applied in a reverse voltage under the stand-by power supply acting in conjunction on the thyristor PN, force the electric current among the thyristor PN to reduce, shortened switching time equally, and concern when opposite when main power source and stand-by power supply instantaneous value under above-mentioned two kinds of situations, can not cause power supply circulation, by above-mentioned narration, realized the present invention to the main power source 6 of load 8 and the switching between the stand-by power supply 7, also can be at main power source thyristor module TP and stand-by power supply side thyristor module TA two ends bypass machinery switch P b respectively in parallel and Ab, when thyristor module is out of service, give load 8 power supplies by bypass machinery switch P b and Ab, can improve operational reliability; Be respectively equipped with isolating switch M1p, M2pM1p and M1a, M2a at main power source thyristor module TP and stand-by power supply side thyristor module TA, two thyristor module TA, TP can be isolated from main commutation circuit 5 fully, with maintenance, maintenance and the test that makes things convenient for thyristor; During concrete enforcement, the electric current of core devices thyristor should be elected 2～3 times of load 8 rated current as, voltage is the twice of rated voltage, the dq conversion has bigger amount of calculation, need computational speed faster, therefore the realization that voltage dip detects among the present invention need adopt the microprocessor with Digital Signal Processing function to finish, and the present invention is higher to the voltage detecting required precision of thyristor both sides, and this voltage measurement unit precision should be 0.1 grade.
Claims (5)
1. double loop power supply switching device shifter based on the thyristor forced commutation, comprise detecting unit (1), calculate and judge detecting unit (2), trigger element (3) and working power (4), it is characterized in that main commutation circuit (5) is connected with trigger element (3) with detecting unit (1) respectively, main commutation circuit (5) also is connected with main power source (6), stand-by power supply (7) and load (8).
2. by the described double loop power supply switching device shifter of claim 1 based on the thyristor forced commutation, it is characterized in that described main commutation circuit (5) is by main power source thyristor module TP and stand-by power supply side thyristor module TA series connection, above-mentioned main power source thyristor module TP and stand-by power supply side thyristor module TA constitute by three thyristor unit are in parallel, correspondingly connect the three-phase of main power source (6) and the three-phase of stand-by power supply (7), each above-mentioned thyristor unit is made of a pair of anti-parallel thyristor, and load (8) is connected with stand-by power supply side thyristor module TA with main power source thyristor module TP.
3. by the described double loop power supply switching device shifter of claim 2, it is characterized in that described bypass machinery switch P b and Ab are in parallel with thyristor module TP and TA respectively based on the thyristor forced commutation.
4. by claim 2 or 3 described double loop power supply switching device shifters based on the thyristor forced commutation, it is characterized in that described isolating switch M1p is connected with main power source thyristor module TP two ends with M2p, isolating switch M1a is connected with stand-by power supply side thyristor module TA two ends with M2a, and isolating switch M2p is connected with isolating switch M2a.
5. by the described double loop power supply switching device shifter based on the thyristor forced commutation of claim 4, the electric current that it is characterized in that described thyristor is 2～3 times of rated current of load (8), and voltage is the twice of rated voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101578111A CN101944764A (en) | 2009-07-07 | 2009-07-07 | Thyristor forced commutation-based double-loop power supply switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101578111A CN101944764A (en) | 2009-07-07 | 2009-07-07 | Thyristor forced commutation-based double-loop power supply switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101944764A true CN101944764A (en) | 2011-01-12 |
Family
ID=43436603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101578111A Pending CN101944764A (en) | 2009-07-07 | 2009-07-07 | Thyristor forced commutation-based double-loop power supply switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101944764A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570590A (en) * | 2012-01-05 | 2012-07-11 | 青岛经济技术开发区创统科技发展有限公司 | Solid-state changeover switch |
| CN102879664A (en) * | 2012-06-26 | 2013-01-16 | 兰州海红技术股份有限公司 | Monitoring system for independent double-way AC (Alternate Current) power distribution equipment |
| CN106785708A (en) * | 2016-12-28 | 2017-05-31 | 广东工业大学 | A kind of socket and its line management method |
| CN111293779A (en) * | 2020-02-28 | 2020-06-16 | 南方电网科学研究院有限责任公司 | Spare power automatic switching system without circulating current |
| CN112366701A (en) * | 2020-11-04 | 2021-02-12 | 合肥联信电源有限公司 | Parallel connection method of static switches |
| CN112583007A (en) * | 2020-12-08 | 2021-03-30 | 西安爱科赛博电气股份有限公司 | Fast solid state transfer switch control strategy and system |
-
2009
- 2009-07-07 CN CN2009101578111A patent/CN101944764A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570590A (en) * | 2012-01-05 | 2012-07-11 | 青岛经济技术开发区创统科技发展有限公司 | Solid-state changeover switch |
| CN102879664A (en) * | 2012-06-26 | 2013-01-16 | 兰州海红技术股份有限公司 | Monitoring system for independent double-way AC (Alternate Current) power distribution equipment |
| CN106785708A (en) * | 2016-12-28 | 2017-05-31 | 广东工业大学 | A kind of socket and its line management method |
| CN106785708B (en) * | 2016-12-28 | 2019-03-29 | 广东工业大学 | A kind of socket and its line management method |
| CN111293779A (en) * | 2020-02-28 | 2020-06-16 | 南方电网科学研究院有限责任公司 | Spare power automatic switching system without circulating current |
| CN112366701A (en) * | 2020-11-04 | 2021-02-12 | 合肥联信电源有限公司 | Parallel connection method of static switches |
| CN112366701B (en) * | 2020-11-04 | 2024-05-10 | 合肥联信电源有限公司 | Parallel connection method of static switch |
| CN112583007A (en) * | 2020-12-08 | 2021-03-30 | 西安爱科赛博电气股份有限公司 | Fast solid state transfer switch control strategy and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101944764A (en) | Thyristor forced commutation-based double-loop power supply switching device | |
| CN103457283B (en) | A kind of super capacitor dynamic voltage recovery system and power-supply system | |
| CN108649592B (en) | Multifunctional automatic phase changing system and method for medium and low voltage line | |
| CN203261121U (en) | Rapid switching control power supply of solenoid valve | |
| CN202424301U (en) | Solid state change-over switch | |
| CN201528201U (en) | Submersible series capacitor compensation device | |
| CN101413982B (en) | Method and apparatus for detecting short circuit of current loop | |
| Moschakis et al. | A detailed model for a thyristor-based static transfer switch | |
| CN215300162U (en) | Low-voltage transformer area load uninterrupted switching system | |
| CN207039169U (en) | Motor stator exception loss protecting device based on chip microcontroller | |
| CN113595227B (en) | Low-voltage transformer area load uninterrupted switching system and working method thereof | |
| CN203481839U (en) | Super capacitor dynamic voltage recovery system and power supply system | |
| CN203574382U (en) | Intelligent control circuit for controlling switching of compensating capacitor | |
| CN102075001A (en) | Intelligent incoming line backup power automatic switching method and device suitable for areas with abundant small hydroelectric stations | |
| CN112583007A (en) | Fast solid state transfer switch control strategy and system | |
| CN101295003A (en) | On-line monitoring method for thyristor of synchronous motor | |
| CN208001155U (en) | Reactive power compensator and potential device | |
| CN201075725Y (en) | Series connection double bus electricity supply system standby with each other | |
| CN110601351A (en) | Dual-power seamless switching device and method | |
| CN101719688B (en) | Starting method for industrial enterprise power supply rapid switching device based on power direction | |
| CN201541146U (en) | Automatic two-way power supply switching unit | |
| CN200990575Y (en) | Elevator frequency changer external hanging energy feedback device | |
| CN102820654B (en) | Cooperative control method of power electronic system | |
| CN208110339U (en) | Double power supply converting switch action state detection circuit | |
| CN208001183U (en) | Backup auto-activating device and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110112 |