CN108429268A - Intelligent stillness wattless occurrence apparatus - Google Patents
Intelligent stillness wattless occurrence apparatus Download PDFInfo
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- CN108429268A CN108429268A CN201810226478.4A CN201810226478A CN108429268A CN 108429268 A CN108429268 A CN 108429268A CN 201810226478 A CN201810226478 A CN 201810226478A CN 108429268 A CN108429268 A CN 108429268A
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- voltage
- reactor
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- parallel
- high breaking
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Classifications
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- 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
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention relates to a kind of intelligent stillness wattless occurrence apparatus; including voltage source inverter; by can turn-off type device break-make the DC voltage on capacitance is converted into the three-phase alternating voltage synchronous with power system voltage; power grid is accessed by reactor, voltage transformer, PCB control panels again; it is parallel with protection module on the reactor; the protection module includes zinc oxide nonlinear energy consumption resistor and the high breaking breaker in parallel with zinc oxide nonlinear energy consumption resistor, and pulse signal acquisition device is arranged on high breaking breaker.It consumes energy low, reliability higher.
Description
Technical field
The invention belongs to distribution systems, are related to a kind of intelligent stillness wattless occurrence apparatus.
Background technology
In a power distribution system, providing a large amount of reactive currents to load for reduction power distribution network causes line power to be lost,
Each load point must configure the reactive power compensator of relevant voltage grade, to improve transmitting capacity of the electric wire netting, reduce transmission losses.Match
The reactive-load compensation of power grid, it has also become ensure the indispensable important link of power grid security economical operation.
In addition, with a large amount of inputs of large power power electronic appliance, the harmonic wave for injecting power grid is increasing, electric network pollution
It is on the rise, power grid quality severe exacerbation.Traditional static compensation and static passive filtration unit cannot be satisfied improvement power grid
Power quality requirement, dynamic passive compensation become increasingly conspicuous with the problem of harmonic wave control.In terms of comprehensive, Reactive Power Control and compensation
Importance be embodied in and solve the problems, such as following four aspects.First, requirement of the power grid to operational efficiency increasingly improves, in order to effectively sharp
It, should be to idle carry out local compensation with power transmission and transformation capacity；Secondly, power supply point is generally off-site from load center, and transmission of electricity at a distance needs
It wants flexible modulation idle and solves stability and voltage control problem to support；Again, in power distribution network there are a large amount of inductive load,
Consumption is a large amount of idle in operation so that distribution system loss is very big；Finally, user for power quality understanding and want
It asks and increasingly improves, improve power factor, reduce voltage deviation and disturbance, administer and inhibit Harmonics amplification, it has also become significant concern
Point.Therefore, the idle carry out local compensation of power grid, especially dynamic are compensated, it is particularly significant in a power distribution system.
Dynamic compensation way include automatic switching capacitor group (TSC, contactor switching), Static Var Compensator (SVC),
Intelligent stillness wattless occurrence apparatus.Wherein, automatic switching capacitor group (TSC, contactor switching), by increasing capacitive to power grid
Reactive load, so that network system power factor improves.This method is technically simple, at low cost, is the low pressure of current mainstream
Complete distribution Reactive Compensation Mode.However there is also many deficiencies for this method, such as：Due to the capacitance assignment problem of capacitor,
The problems such as grouping switching is intermittent, discontinuous for the compensation of inductive reactive power under compensating, and there are undercompensation or overcompensation.Separately
Parallel resonance or Harmonic Amplification Problem caused by outer harmonic wave also seriously affect operational safety and the service life of capacitor group.It is static
Reactive-load compensator (SVC) controls switching reactor and capacitor group by thyristor and forms, this method Reactive-power control speed is fast,
And can realize smooth adjustment, but the method for operation itself manufactures harmonic wave, need to configure passive filter to absorb, is easy in switching
Higher hamonic wave is generated, equipment power dissipation is larger.The main body of intelligent stillness wattless occurrence apparatus is a voltage source inverter, by can
DC voltage on capacitance, is converted into the three-phase alternating current synchronous with power system voltage by turn-off type device break-make appropriate
Pressure, then power grid is accessed by reactor, voltage transformer, PCB control panels.The output voltage of suitable control inverter, so that it may with
Neatly change its operating condition, is at capacitive, perception or zero load state.Compared with Static Var Compensator (SVC),
Faster, harmonic current is less for static reactive generator response speed, and remain to when system voltage is relatively low to system injection compared with
Big is idle.With the technology maturation and cost reduction of static reactive generator, gradually become the important technology in compensation field
Means.Existing intelligence stillness wattless occurrence apparatus uses high performance control core plate and all-controlling power electronics device, examines in real time
Electric current in power grid is surveyed, quick separating goes out reactive current component, and generates control instruction according to the size of reactive current, in real time will be big
Small compensation electric current equal, that direction is opposite is injected into power grid, realizes instantaneous cancellation reactive current.But existing intelligence is static
Reactive generating device finds that its unfailing performance need to be improved in actual use.
Invention content
It is an object of the present invention to provide a kind of intelligent stillness wattless occurrence apparatus, and consume energy low, reliability higher.
In order to achieve the goal above, the technical solution adopted by the present invention is：A kind of intelligence stillness wattless occurrence apparatus, including
Voltage source inverter, by can turn-off type device break-make the DC voltage on capacitance is converted into it is synchronous with power system voltage
Three-phase alternating voltage, then power grid is accessed by reactor, voltage transformer, PCB control panels, is parallel on the reactor
Protection module, the protection module include zinc oxide nonlinear energy consumption resistor and in parallel with zinc oxide nonlinear energy consumption resistor
Pulse signal acquisition device is arranged on high breaking breaker for high breaking breaker.
Further, the device includes the first current-voltage transformer being set on current output line, and electric current is defeated
In outlet breaker, fuse, the first reactor, precharge list have been sequentially connected in series positioned at the upper of the first current-voltage transformer
Member, the second current-voltage transformer, the second reactor, voltage source inverter and capacitance, on the first reactor, the second reactor
It is parallel with protection module.
Preferably, the input of high breaking breaker, output end are both provided with pulse signal acquisition device.
The technical effects of the invention are that：Intelligence stillness wattless occurrence apparatus of the present invention is non-thread using the zinc oxide of large capacity
Property energy consumption resistor it is in parallel with high breaking breaker, on high breaking breaker use pulse signal acquisition device, when electric system send out
When raw short circuit, pulse signal acquisition device sends a signal to high breaking breaker, and high breaking breaker cut-offs rapidly, cut-offs simultaneously
Energy in the process is absorbed by zinc oxide nonlinear energy consumption resistor in parallel therewith, and at this moment reactor puts into operation, and energy consumption is low, can
By property higher.
Description of the drawings
Fig. 1 is the structure chart of the present invention.
Specific implementation mode
With reference to attached drawing, a kind of intelligence stillness wattless occurrence apparatus, including voltage source inverter 1, by can turn-off type device
DC voltage on capacitance 2 is converted into the three-phase alternating voltage synchronous with power system voltage by break-make, then by reactor,
Voltage transformer, PCB control panels access power grid, and protection module 3, the protection module 3 packet are parallel on the reactor
Include zinc oxide nonlinear energy consumption resistor 3a and the high breaking breaker 3b in parallel with zinc oxide nonlinear energy consumption resistor 3a, high breaking
Pulse signal acquisition device is set on breaker 3b.
Further, the device includes the first current-voltage transformer being set on current output line, and electric current is defeated
In outlet breaker, fuse, the first reactor 4a, precharge have been sequentially connected in series positioned at the upper of the first current-voltage transformer
Unit, the second current-voltage transformer, the second reactor 4b, voltage source inverter 1 and capacitance 2, the first reactor 4a, second
Protection module 3 is parallel on reactor 4b.
Intelligence stillness wattless occurrence apparatus of the present invention uses the zinc oxide nonlinear energy consumption resistor 3a and high breaking of large capacity
Breaker 3b is in parallel, and pulse signal acquisition device is used on high breaking breaker 3b, when short circuit occurs for electric system, pulse letter
Number harvester sends a signal to high breaking breaker 3b, and high breaking breaker 3b is cut-off rapidly, while the energy in interrupting process
Amount is absorbed by zinc oxide nonlinear energy consumption resistor 3a in parallel therewith, and at this moment reactor puts into operation, and energy consumption is low, and reliability is more
It is high.
In Fig. 1 after breaker closing, voltage source inverter 1 is first by the pre-charge resistance of precharge unit to capacitance
2 charging, this process can clock for 10 seconds, prevent after the power is turned on to the moment impact of capacitance 2.When busbar voltage Vdc arrival is specified
After value, the pre-charge contactor of precharge unit is closed.When 1 dead electricity of voltage source inverter, pre-charge contactor can just be beaten
It opens.
Preferably, the input of high breaking breaker 3b, output end are both provided with pulse signal acquisition device.
Playing the role of in this way can to the consumption reduction of entire intelligent stillness wattless occurrence apparatus.Pulse signal acquisition device is to height
There are signal transmission in the forward and backward parts breaking circuit breaker 3b, and that accelerates high breaking breaker 3b cut-offs speed, while reliability is high
Efficiency is faster.
Claims (3)
1. a kind of intelligence stillness wattless occurrence apparatus, including voltage source inverter (1), by can turn-off type device break-make by capacitance
(2) DC voltage on is converted into the three-phase alternating voltage synchronous with power system voltage, then passes through reactor, mutual induction of voltage
Device, PCB control panels access power grid, it is characterised in that：Protection module (3), the protection mould are parallel on the reactor
Block (3) includes zinc oxide nonlinear energy consumption resistor (3a) and the high breaking in parallel with zinc oxide nonlinear energy consumption resistor (3a) open circuit
Pulse signal acquisition device is arranged on high breaking breaker (3b) for device (3b).
2. intelligence stillness wattless occurrence apparatus according to claim 1, it is characterised in that：The device includes being set to
The first current-voltage transformer on current output line, be located on current output line the first current-voltage transformer it is upper successively
It is in series with breaker, fuse, the first reactor (4a), precharge unit, the second current-voltage transformer, the second reactor
(4b), voltage source inverter (1) and capacitance (2) are parallel with protection mould on the first reactor (4a), the second reactor (4b)
Block (3).
3. intelligence stillness wattless occurrence apparatus according to claim 2, it is characterised in that：High breaking breaker (3b) it is defeated
Enter, output end is both provided with pulse signal acquisition device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810226478.4A CN108429268A (en) | 2018-03-19 | 2018-03-19 | Intelligent stillness wattless occurrence apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810226478.4A CN108429268A (en) | 2018-03-19 | 2018-03-19 | Intelligent stillness wattless occurrence apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108429268A true CN108429268A (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810226478.4A Pending CN108429268A (en) | 2018-03-19 | 2018-03-19 | Intelligent stillness wattless occurrence apparatus |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082442A (en) * | 2011-03-14 | 2011-06-01 | 丹东欣泰电气股份有限公司 | High-voltage static var generator (SVG) without starting circuit and method for connecting SVG to power grid |
| CN203398793U (en) * | 2013-07-23 | 2014-01-15 | 湖南森能电力科技有限公司 | Low-voltage dynamic reactive power compensation device |
| CN105226657A (en) * | 2015-10-26 | 2016-01-06 | 国网上海市电力公司 | A kind of series-parallel comprehensive compensation arrangement administered for power distribution network low-voltage |
| CN205863889U (en) * | 2016-05-17 | 2017-01-04 | 安徽徽凯电气有限公司 | Power system reactor bypass energy-saving protective device |
| CN206461365U (en) * | 2017-02-16 | 2017-09-01 | 科姆勒电气（安徽）有限公司 | Intelligent static reacance generator |
-
2018
- 2018-03-19 CN CN201810226478.4A patent/CN108429268A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082442A (en) * | 2011-03-14 | 2011-06-01 | 丹东欣泰电气股份有限公司 | High-voltage static var generator (SVG) without starting circuit and method for connecting SVG to power grid |
| CN203398793U (en) * | 2013-07-23 | 2014-01-15 | 湖南森能电力科技有限公司 | Low-voltage dynamic reactive power compensation device |
| CN105226657A (en) * | 2015-10-26 | 2016-01-06 | 国网上海市电力公司 | A kind of series-parallel comprehensive compensation arrangement administered for power distribution network low-voltage |
| CN205863889U (en) * | 2016-05-17 | 2017-01-04 | 安徽徽凯电气有限公司 | Power system reactor bypass energy-saving protective device |
| CN206461365U (en) * | 2017-02-16 | 2017-09-01 | 科姆勒电气（安徽）有限公司 | Intelligent static reacance generator |
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Application publication date: 20180821 |