CN109217332A - A kind of automatic switchover system of pair of generating set reactive compensation - Google Patents
A kind of automatic switchover system of pair of generating set reactive compensation Download PDFInfo
- Publication number
- CN109217332A CN109217332A CN201811151751.8A CN201811151751A CN109217332A CN 109217332 A CN109217332 A CN 109217332A CN 201811151751 A CN201811151751 A CN 201811151751A CN 109217332 A CN109217332 A CN 109217332A
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- generating set
- relay
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- compensation
- terminals
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- 230000005611 electricity Effects 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The present invention relates to the automatic switchover systems of a kind of pair of generating set reactive compensation, three are opened including three and closes relay, generating set current transformer and compensation output automatic transfer switch, and three, which open three, closes the normally-closed contact of relay and connect with the secondary side terminal of generating set current transformer；Three, which open three, closes the normally opened contact of relay and connect with the secondary side terminal of mains current mutual inductor；Three open the supply terminals that three close relay connect with alternating current main bus-bar terminals；The sampled voltage signal input part of compensating controller is connect with generator bus terminals；Fling-cut switch control terminal connects in the control signal output and compensating cabinet of compensating controller；The main power supply terminals of compensation output automatic transfer switch are connect with alternating current main bus-bar terminals；The available supply terminals of compensation output automatic transfer switch is connect with generator bus terminals.The present invention is able to achieve the reactive compensation to generating set, not only effectively saves electric energy, but also significantly improve the power supply capacity of generating set.
Description
Technical field
The present invention relates to the automatic switching control equipments of a kind of pair of generating set reactive compensation.
Background technique
It is all provided with generating set in current numerous construction projects, when municipal power loss, generating set starts automatically,
The emergency power sources of self-preparing is provided for some important power loads, when municipal power up, generating set autostop exits fortune
Row.In general, system power factor when each power load is without reactive compensation is 0.8 or so, at this time to reduce reactive loss, mention
High mains-supplied ability need to carry out reactive compensation to distribution system, make system power factor not less than 0.95.Due to generating set
It only uses in municipal power loss, to reduce investment outlay, is not set individually on the generator bus of electric set electric supply at present
Set reactive power compensator, so that generating set institute on-load power factor can only achieve 0.8 or so, affect generating set
Power output, reduces its power supply capacity, wastes the energy.
Summary of the invention
The problem to be solved by the invention is to provide a kind of automatic switchover system of generating set reactive compensation, the system is logical
A set of current sample mechanism for automatically switching and one group of compensation output automatic transfer switch are crossed, nothing will be provided originally for mains-supplied system
The compensation device of function compensation, automatically switches to and provides reactive compensation for generating set.Using the investment of very little, hair can be greatly improved
The active power of motor group exports.
Present invention provide the technical scheme that a kind of automatic switchover system of generating set reactive compensation, including electric current are adopted
Sample mechanism for automatically switching, compensating cabinet, compensating controller and compensation output automatic transfer switch, the current sample automatic switching machine
Structure opens three including three and closes relay, generating set current transformer, and three open the normally-closed contacts that three close relay and generating set electricity
The secondary side terminal of current transformer connects；Three, which open three, closes the normally opened contact of relay and the secondary of mains current mutual inductor flanks
Line end connection；Three open the supply terminals that three close relay connect with alternating current main bus-bar terminals；Three, which open three, closes the defeated of relay
The connection of the sampled current signals input terminal of outlet and compensating controller；The sampled voltage signal input part of compensating controller and power generation
The connection of machine bus terminals；Fling-cut switch control terminal connects in the control signal output and compensating cabinet of compensating controller；Compensation
One output end of output automatic transfer switch is connect with alternating current main bus-bar terminals；Another output connects with generator bus
Line end connection.The input terminal of compensation output automatic transfer switch and the reactive power output end of compensating cabinet connect.
The compensation output automatic transfer switch is double power supply automatic transfer switch.
The current sample mechanism for automatically switching further includes time-delay relay, and three, which open three, closes the output end of relay by prolonging
When relay and compensating controller sampled current signals input terminal connect.
Described three, which open three, closes relay with generating set current transformer, mains current mutual inductor, time-delay relay to have
Line mode connects and wireless mode connection, and compensating controller and time-delay relay etc. are connect in a wired fashion or wireless mode company
It connects.
The present invention makes full use of the compensation system of when electric set electric supply " usually use when mains-supplied, idle ", only
Mains-supplied system on a small quantity, cleverly improve, a small amount of electric components, including above-mentioned a set of current sample are only increased
Mechanism for automatically switching and one group of compensation output automatic transfer switch etc., gross investment is extremely limited, but effectively increases generating set
Power supply capacity or reduce generating set investment cost.So cost performance of the present invention is very high, not only securely and reliably, but also economic conjunction
Reason, has filled up the relevant technologies blank, economic benefit, social benefit and energy-saving benefit highly significant are suitble in numerous engineering projects
Middle application, has broad application prospects.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 opens three for three and closes relay terminal schematic diagram.
Specific embodiment
It is detailed in Fig. 1 and Fig. 2, the present invention includes current sample mechanism for automatically switching, compensating cabinet, compensating controllerWith
Compensation output automatic transfer switch 9., the current sample mechanism for automatically switching include three open three close relay 7., generating set
2., three open three closes the secondary side terminal company of the normally-closed contact of relay 7. and generating set current transformer 2. to current transformer
It connects；Three, which open three, closes the normally opened contact of relay 7. and connect with the secondary side terminal of mains current mutual inductor 1.；Three open three close after
6. terminals are connect the supply terminals of electric appliance 7. with alternating current main bus-bar；Three, which open three, closes the output end of relay 7. and compensation control
DeviceSampled current signals input terminal connection；Compensating controllerSampled voltage signal input part and generator bus 5.
Terminals connection；Compensating controllerControl signal output and compensating cabinetMiddle fling-cut switch control terminal connection；It compensates defeated
6. terminals are connect the input terminal of automatic transfer switch 9. with alternating current main bus-bar out；9. compensation output automatic transfer switch
5. terminals are connect another input terminal with generator bus.
The current sample mechanism for automatically switching further include time-delay relay 8., three open three, and to close the output end of relay 7. logical
Cross time-delay relay 8. with compensating controllerSampled current signals input terminal connection.
Described three open three close relay 7. with generating set current transformer 2., mains current mutual inductor 1., delay relay
Device 8. connection or wireless mode connection in a wired fashion, compensating controllerIt 8. waits with time-delay relay and connect in a wired fashion
Or wireless mode connection.
It is of the invention that the specific working principle is as follows:
Compensating controllerVoltage input signal be derived from the three-phase voltage of generator bus 5., compensating controllerElectric current
1. 2. input signal, which is derived from mains current mutual inductor, passes through three with generating set current transformer and opens three and close relay and 7. switch, prolong
When the three-phase current that is 8. delayed of relay.Compensating controllerPhase splitting compensation capacity is calculated using related algorithm, and exports control
Signal processed realizes phase splitting compensation reactive power.
When 3. the transformer of mains-supplied works normally, the power supply of generator bus 5. is through double power supply automatic transfer switch
10. 6. (being in A) is derived from alternating current main bus-bar, compensating cabinet9. compensated output automatic transfer switch (is in C) and is connected to city
Electric main bus-bar 6., compensating controller at this timeThe voltage signal of collected generator bus 5. is the electricity of alternating current main bus-bar 6.
Press signal, collected current signal is by three to open three and close relay 7. to choose the three-phase current of mains current mutual inductor 1.,
Realize the reactive power of compensating cabinet phase splitting compensation alternating current whole load.
When alternating current power-off, alternating current main bus-bar 6. power loss, at this time to ensure the power supply to important load, generating set is being advised
In the fixed time 4. (usual 15~30s) starting generating set is used as the emergency power sources of self-preparing, at this time double power supply automatic transfer switch
10. automatically switching to B.9. compensation output automatic transfer switch automatically switches to D, 5. provide idle benefit for generator bus
It repays.It opens the power supply that three close the coil 12 of relay 7. and is derived from alternating current main bus-bar 6. due to three, now because of alternating current main bus-bar 6. power loss, three
It opens three and closes the coil 12 of relay 7. power loss therewith, current sampling signal automatically switches to three of generating set current transformer 2.
8. phase current, this current signal access compensating controller by time-delay relay, former compensating cabinet is utilized to realizeSplit-phase
The reactive power of the whole loads of automatic offset electricity generation unit institute band (is arranged the purpose of time-delay relay 8., is in order to ensure compensating
Cabinet capacitor puts into operation again after being substantially discharged, so that capacitor be avoided to puncture, the visual capacitor discharge time of delay time and
It is fixed).
It is involved in the present invention to component be the prior art matured product.
The compensating controller involved in the present invention arrived is original mains-supplied system configuration, using collected electric current and
Voltage signal calculates phase splitting compensation capacity by related algorithm, and output control signal realizes phase splitting compensation reactive power.
The compensating cabinet involved in the present invention arrived is original mains-supplied system configuration, and compensation fling-cut switch form can be to connect
The semiconductor switch devices such as tentaculum or thyristor, IGBT；Compensation device can be switch on-off fixed capacity, Static Var Compensator
The types such as SVC, static reactive generator SVG, synchronous capacitor.
Three in the present invention, which open three, closes relay 7. connecting terminal schematic diagram, as shown in Figure 2.Wherein, 1,2,3 be respectively A,
B, the signal output terminal of C three-phase current；4,5,6 be respectively alternating current A, B, C three-phase current signal input terminal；7,8,9 points
Not Wei generating set A, B, C three-phase current signal input terminal；12 open three coils for closing relay for three, and 10,11 open for three
Three close the power supply terminal of relay coil.
When mains-supplied, three open three close the coil 12 of relay 7. it is electric, input terminal 4,5,6 connect, sample at this time
Signal is mains current signal.
When alternating current power-off, electric set electric supply, three, which open three, closes 12 power loss of coil of relay 7., input terminal 7,8,9
It connects, sampled signal is generating set current signal at this time.
Conclusion
The present invention only exports automatic transfer switch by adding a set of current sample mechanism for automatically switching and one group of compensation, in alternating current
When main bus-bar power loss, the reactive power compensator for alternating current deactivated is automatically switched to and carries out nothing for generating set important load
Function compensation when alternating current main bus-bar restores electricity, and switchback can restore to carry out reactive compensation to alternating current full load, i.e., with very automatically
The reactive compensation to generating set is successfully realized in small investment, not only effective electricity-saving energy, but also significantly improves the confession of generating set
Electric energy power, so as to provide electricity consumption guarantee for more important loads.
After present system provides reactive compensation, generating set system power factor be can be improved by 0.8 to 0.95.Example
Such as: capacity is the generating set of 1000kVA, and powerfactorcosφ=0.8 before compensating, i.e., available active power is 800kW,
Powerfactorcosφ=0.95 after present system compensates, i.e., available active power is 950kW, so through of the invention
After automatic switchover system compensation, generating set can provide active power 150kW more, and the power supply capacity for being equivalent to generating set improves
: 150/800 x100%=18.75%.
On the other hand, in the case where engineering project important load total capacity is constant, the installation of generating set can also be reduced
Capacity reduces initial cost, reduces operating cost.Such as: the practical important load active power of certain project is 750kW, is not being used
Before present system, generator system powerfactorcosφ=0.8, the generating set at least needing that capacity is selected to be 1000kVA.
And after using present system, generator system powerfactorcosφ=0.95, then only needing to select capacity is 800kVA's
Generating set can be met the requirements, and it is (domestic, inlet generating unit to make to be equivalent to the expense of reducing investment outlay 20~500,000 yuan
Valence is different).
The present invention makes full use of the compensation device of when electric set electric supply " usually use when mains-supplied, idle ", only
Mains-supplied system on a small quantity, cleverly improve, a small amount of electric components, including above-mentioned a set of current sample are only increased
Mechanism for automatically switching and one group of compensation output automatic transfer switch etc., gross investment is extremely limited, but effectively increases generating set
Power supply capacity or reduce generating set investment cost.So cost performance of the present invention is very high, not only securely and reliably, but also economic conjunction
Reason, has filled up the relevant technologies blank, economic benefit, social benefit and energy-saving benefit highly significant are suitble in numerous engineering projects
Middle application, has broad application prospects.
Claims (4)
1. the automatic switchover system of a kind of pair of generating set reactive compensation, including current sample mechanism for automatically switching, compensating cabinet, benefit
Repay controller and compensation output automatic transfer switch, it is characterised in that: the current sample mechanism for automatically switching opens three including three
Relay, generating set current transformer are closed, three open the two of the normally-closed contact that three close relay and generating set current transformer
Secondary side terminal connection；Three, which open three, closes the normally opened contact of relay and connect with the secondary side terminal of mains current mutual inductor；Three
The supply terminals that three close relay is opened to connect with alternating current main bus-bar terminals；Three open the output end that three close relay and compensation control
The sampled current signals input terminal of device processed connects；The sampled voltage signal input part and generator bus terminals of compensating controller
Connection；Fling-cut switch control terminal connects in the control signal output and compensating cabinet of compensating controller；Compensation output is automatically switched
One output end of switch is connect with alternating current main bus-bar terminals, and another output is connect with generator bus terminals；It mends
The reactive power output end of the input terminal and compensating cabinet of repaying output automatic transfer switch connects.
2. the automatic switchover system of generating set reactive compensation according to claim 1, it is characterised in that: the compensation is defeated
Automatic transfer switch is double power supply automatic transfer switch out.
3. the automatic switchover system of generating set reactive compensation according to claim 1 or 2, it is characterised in that: the electricity
Stream sampling mechanism for automatically switching further includes time-delay relay, and three, which open the output end that three close relay, passes through time-delay relay and compensation
The sampled current signals input terminal of controller connects.
4. the automatic switchover system of generating set reactive compensation according to claim 3, it is characterised in that: described three open three
Close the connection in a wired fashion or wireless of relay and generating set current transformer, mains current mutual inductor, time-delay relay
Mode connects, and compensating controller is connect in a wired fashion with time-delay relay or wireless mode connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811151751.8A CN109217332A (en) | 2018-09-29 | 2018-09-29 | A kind of automatic switchover system of pair of generating set reactive compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811151751.8A CN109217332A (en) | 2018-09-29 | 2018-09-29 | A kind of automatic switchover system of pair of generating set reactive compensation |
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| Publication Number | Publication Date |
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| CN109217332A true CN109217332A (en) | 2019-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811151751.8A Withdrawn CN109217332A (en) | 2018-09-29 | 2018-09-29 | A kind of automatic switchover system of pair of generating set reactive compensation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738676A (en) * | 2019-03-06 | 2019-05-10 | 湖南省湘电试验研究院有限公司 | A kind of frequency signal wiring switching device and its application method |
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| CN103986167A (en) * | 2014-04-03 | 2014-08-13 | 珠海万力达电气股份有限公司 | Reactive compensation device and reactive compensation method |
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| CN105866592A (en) * | 2016-05-18 | 2016-08-17 | 国网山西省电力公司电力科学研究院 | System and method for acquiring dynamic reactive power compensation response waveforms |
| CN106998100A (en) * | 2017-05-22 | 2017-08-01 | 合肥联信电源有限公司 | A kind of centralized emergency power supply configuration system |
| CN207010245U (en) * | 2017-07-24 | 2018-02-13 | 中海石油海南天然气有限公司 | A kind of reactive-load compensation automatic tracking control apparatus |
| CN208874294U (en) * | 2018-09-29 | 2019-05-17 | 中信建筑设计研究总院有限公司 | A kind of automatic switching control equipment of pair of generating set reactive compensation |
-
2018
- 2018-09-29 CN CN201811151751.8A patent/CN109217332A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986167A (en) * | 2014-04-03 | 2014-08-13 | 珠海万力达电气股份有限公司 | Reactive compensation device and reactive compensation method |
| CN204205612U (en) * | 2014-11-27 | 2015-03-11 | 宁波华浙电力技术有限公司 | For the Powerless compensation control box of double power-supply system |
| CN105866592A (en) * | 2016-05-18 | 2016-08-17 | 国网山西省电力公司电力科学研究院 | System and method for acquiring dynamic reactive power compensation response waveforms |
| CN106998100A (en) * | 2017-05-22 | 2017-08-01 | 合肥联信电源有限公司 | A kind of centralized emergency power supply configuration system |
| CN207010245U (en) * | 2017-07-24 | 2018-02-13 | 中海石油海南天然气有限公司 | A kind of reactive-load compensation automatic tracking control apparatus |
| CN208874294U (en) * | 2018-09-29 | 2019-05-17 | 中信建筑设计研究总院有限公司 | A kind of automatic switching control equipment of pair of generating set reactive compensation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109738676A (en) * | 2019-03-06 | 2019-05-10 | 湖南省湘电试验研究院有限公司 | A kind of frequency signal wiring switching device and its application method |
| CN109738676B (en) * | 2019-03-06 | 2023-11-24 | 湖南省湘电试验研究院有限公司 | Frequency signal wiring switching device and application method thereof |
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Application publication date: 20190115 |