CN205945010U - Generator connecting in parallel with system system based on parallel reactor large capacity fast switch cabinet - Google Patents
Generator connecting in parallel with system system based on parallel reactor large capacity fast switch cabinet Download PDFInfo
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- CN205945010U CN205945010U CN201620997177.8U CN201620997177U CN205945010U CN 205945010 U CN205945010 U CN 205945010U CN 201620997177 U CN201620997177 U CN 201620997177U CN 205945010 U CN205945010 U CN 205945010U
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Abstract
Generator connecting in parallel with system system based on parallel reactor large capacity fast switch cabinet solves prior art's electric power system cluster and goes into voltage drop, energy losses and the leakage magnetic field scheduling problem that brings behind the reactor. The utility model discloses it is main including large capacity fast switch cabinet, connect the transformer substation to it has the reactor to ally oneself with, large capacity fast switch cabinet is connected to an auxiliary switch cabinet, still drives the auxiliary assembly of generator through the transformer, the 2nd auxiliary switch cabinet for gather the first electrical parameter of one section electric wire netting, connect large capacity fast switch cabinet, large capacity fast switch cabinet is connected to the generator connecting in parallel with system cubical switchboard, the generator for auxiliary assembly switches on the back electricity generation, connects the generator connecting in parallel with system cubical switchboard, first motor switch cabinet for gather the second electrical parameter of generator or two -stage process electric wire netting, connect the generator. The utility model is used for generator connecting in parallel with system.
Description
Technical field
The present invention relates to generator connecting in parallel with system system is and in particular to generating based on shunt reactor large capacity quick switch cabinet
Machine grid-connected system.
Background technology
In power system, the be short-circuited situation of fault of system happens occasionally, and short circuit current can cause very big to system
Impact, in order to solve this problem, general way is series connection current-limiting reactor in systems, using its inductance characteristic, limits
The short circuit current of system processed, reduces the impact to system for the short circuit current；This mode can also reduce cut-offfing of breaker selection
Capacity, expense of reducing investment outlay, improves the residual voltage of system simultaneously.
But after current-limiting reactor, also can bring some negative effects to system, such as can there is very big electric energy
Loss, if system voltage has big voltage pulsation, can cause big voltage pulsation when starting jumbo motor,
Thus affecting the normal operation of other equipment, make Generator Voltage Regulation difficult impact system stability.Simultaneously to power supply unit around, build
Build thing and communications service can produce large effect, or even cause unit exception.How to eliminate reactor generation these bear
Face rings, and has become as the very important problem being faced in the normal operation of power system.
Content of the invention
For above-mentioned prior art, present invention aim at providing sending out based on shunt reactor large capacity quick switch cabinet
Motor grid-connected system, voltage drop, electric energy loss and stray field that the power system of solution prior art brings after sealing in reactor
The problems such as.
For reaching above-mentioned purpose, the technical solution used in the present invention is as follows：
Based on the generator connecting in parallel with system system of shunt reactor large capacity quick switch cabinet, including large capacity quick switch cabinet,
Connect transformer station, be parallel with reactor；First auxiliary switch cabinet, connects large capacity quick switch cabinet, drives also by transformer
The auxiliary equipment of generator；Second auxiliary switch cabinet, for gathering the first electrical quantity of one section of electrical network, connects Large Copacity and quickly opens
Close cabinet；Generator connecting in parallel with system switch cubicle, connects large capacity quick switch cabinet；Generator, generates electricity for after auxiliary equipment conducting, connects
Generator connecting in parallel with system switch cubicle；First generator contactor cabinet, for gathering the second electrical quantity of generator or two sections of electrical networks, connects and sends out
Motor；Described generator connecting in parallel with system switch cubicle, for the conducting when the first electrical quantity is equal to the second electrical quantity generating electricity
Machine is grid-connected.
In such scheme, the first described auxiliary switch cabinet or the second auxiliary switch cabinet pass through the 3rd auxiliary switch cabinet and connect
Large capacity quick switch cabinet.
In such scheme, described the first auxiliary switch cabinet, the second auxiliary switch cabinet or the 3rd auxiliary switch cabinet, including high
Pressure vacuum circuit breaker.
In such scheme, described high-pressure vacuum breaker, from model ZN63A-12.
In such scheme, also include the second generator contactor cabinet, for the electrical quantity collection of generator, connect generator.
In such scheme, described electrical quantity, including phase place, amplitude and frequency.
In such scheme, described large capacity quick switch cabinet, including current-carrying pontic parallel with one another, high-voltage and current-limitation fusing
Device and zinc oxide nonlinear assembly, jointly in parallel with reactor.
In such scheme, described reactor, from model XKDGKL-10.
In such scheme, described current-carrying pontic is 1 to 2000 with the impedance ratio of high-voltage and current-limitation fuse.
Compared with prior art, beneficial effects of the present invention：
Introduce Voltage Drop to generator connecting in parallel with system system, concrete effect is as follows
1), the energy-saving effect after reactor parallel connection large capacity quick switch
After reactor and large capacity quick switch parallel connection, when normally running, reactor is substantially existed by FSR short circuit, electric current
Pass through on FSR, after short trouble, FSR quick blast within the time of 0.2ms disconnects, and electric current ability is passed through from reactor.
The energy-saving effect of reactor thus can be reached.
Rated current is 2000A, and reactance Rate is that the active loss of 8% reactor is about 9kw, in year run time
In the case of 8000h, the such as electricity charge are pressed 0.4 yuan/kWh and are calculated, and the energy loss of every reactor active loss is up to every year
Ten thousand yuan of 8000 × 9 × 3 × 0.4=8.64.So, only avoid electric energy loss one, every reactor just can realize annual 80000
The economic benefit of Yu Yuan.
2) extend the service life of generator and main transformer
When system short-circuit, the quick disjunction of FSR, reactor is sealed in major loop, is cut-off by the breaker of fault short
Road electric current.Due to the current limliting of FSR, equipment is not subjected to the impact of short circuit current, extends making of the equipment such as generator, main transformer
With the life-span, substantially increase the margin of safety in dynamic stability and thermally-stabilised aspect for the system equipment.The rapidity of FSR, fault is made to cut
The time removed greatly shortens (less than 3ms), more can be effectively protected equipment.Substantial amounts of result of study shows, only in 20ms
Excision fault, is just avoided that the damage of the equipment such as main transformer and generator, FSR limits and cut-offs overvoltage, makes to produce in interrupting process
Raw overvoltage is limited in the range of equipment permission.
3) reduce the capacity of short circuit selecting system high pressure breaker, improve the economy selecting primary cut-out to select
Property.
Brief description
Fig. 1 is the equivalent electric diagram of FSR primary system of the present invention；
Fig. 2 is the action current waveform diagram of the present invention；
Fig. 3 is the electrical schematics of each switch cubicle of the present invention.
Specific embodiment
All features disclosed in this specification, or disclosed all methods or during step, except mutually exclusive
Feature and/or step beyond, all can combine by any way.
The present invention will be further described below in conjunction with the accompanying drawings：
Embodiment 1
During normal operation, by reactor short circuit, electric current is substantially all to be passed through from FSR FSR, just fundamentally avoids
Voltage pulsation, electric energy loss and stray field that when often running, reactor brings.
The principle of large capacity quick switch is：FS is current-carrying pontic, and the impedance ratio of FS and FU is 1:2000.Flow through when normal
Operating current, once short trouble occurs, after being connected to the fragmentation command of measurement and control unit, FS explosion within 0.15ms disconnects；FU
For high-voltage and current-limitation fuse, after FS disjunction, whole short circuit currents are forced in FU, through 0.5msFU fusing；FR is that zinc oxide is non-
Linear modules, are changed into turning on from cut-off under the arc voltage effect when FU fuses, energy absorption, mitigate the arc pressure in FU, and
Within the phase voltage of the overvoltage in interrupting process is limited in equipment permission 2.5 times.As shown in Fig. 2 fuse FU is in t1
Fuse in time and dam, and produce arc voltage and electric current is forced into rapid decay in nonlinear resistance FR, now short circuit current only rises
To IP, only the 1/5 to 1/10 of prospective short circuit current peak value.
Microcomputer control device detection electric current and current changing rate, using advanced computing circuit and algorithm routine so that surveying
Control unit can complete algorithm routine and judgement within 0.15ms.This device adopts the observing and controlling portion that 3 identicals work independently
Part, is judged with " two from three " manner of execution, when current amplitude and current changing rate exceed definite value simultaneously, is judged as short circuit
Occur, send originating terminal signal to FS.
In Fig. 2,1 expects three short circuit current curve for system；2 is short circuit current attenuation curve in FR；3 is FSR's
Starting current value i=ilimit；4 is the overcurrent curve of peak value；5 is the current changing rate of the actual act current curve of system
Tangent line；T0 reaches required time during working value for short circuit current；T1 is the current cut-off time；T2 be current attenuation to zero when
Between；IP is cut-off current.
In Fig. 3,1AH-7AH is switch cubicle, and 1TV-3TV is mutual inductance type voltage acquisition point.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Belong to those skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in, all answer
It is included within the scope of the present invention.
Claims (9)
1. the generator connecting in parallel with system system based on shunt reactor large capacity quick switch cabinet is it is characterised in that include
Large capacity quick switch cabinet (7AH), connects transformer station, is parallel with reactor；
First auxiliary switch cabinet (5AH), connects large capacity quick switch cabinet (7AH), drives generator also by transformer (1DB)
Auxiliary equipment；
Second auxiliary switch cabinet (4AH), for gathering the first electrical quantity of one section of electrical network, connects large capacity quick switch cabinet
(7AH)；
Generator connecting in parallel with system switch cubicle (3AH), connects large capacity quick switch cabinet (7AH)；
Generator, generates electricity for after auxiliary equipment conducting, connects generator connecting in parallel with system switch cubicle (3AH)；
First generator contactor cabinet (2AH), for gathering the second electrical quantity of generator or two sections of electrical networks, connects generator；
Described generator connecting in parallel with system switch cubicle (3AH), for the conducting when the first electrical quantity is equal to the second electrical quantity to incite somebody to action
Generator connecting in parallel with system.
2. the generator connecting in parallel with system system based on shunt reactor large capacity quick switch cabinet according to claim 1, it is special
Levy and be, the first described auxiliary switch cabinet (5AH) or the second auxiliary switch cabinet (4AH) pass through the 3rd auxiliary switch cabinet (6AH)
Connect large capacity quick switch cabinet (7AH).
3. the generator connecting in parallel with system system based on shunt reactor large capacity quick switch cabinet according to claim 2, it is special
Levy and be, described the first auxiliary switch cabinet (5AH), the second auxiliary switch cabinet (4AH) or the 3rd auxiliary switch cabinet (6AH), bag
Include high-pressure vacuum breaker.
4. the generator connecting in parallel with system system based on shunt reactor large capacity quick switch cabinet according to claim 3, it is special
Levy and be, described high-pressure vacuum breaker, from model ZN63A-12.
5. the generator connecting in parallel with system system based on shunt reactor large capacity quick switch cabinet according to claim 1, it is special
Levy and be, also include the second generator contactor cabinet (1AH), for the electrical quantity collection of generator, connect generator.
6. the generator connecting in parallel with system system based on shunt reactor large capacity quick switch cabinet according to claim 1 or 5, its
It is characterised by, described electrical quantity, including phase place, amplitude and frequency.
7. the generator connecting in parallel with system system based on shunt reactor large capacity quick switch cabinet according to claim 1, it is special
Levy and be, described large capacity quick switch cabinet (7AH), including current-carrying pontic FS, high-voltage and current-limitation fuse FU parallel with one another
With zinc oxide nonlinear assembly FR, jointly in parallel with reactor.
8. the generator connecting in parallel with system system based on shunt reactor large capacity quick switch cabinet according to claim 1 or 7, its
It is characterised by, described reactor, from model XKDGKL-10.
9. the generator connecting in parallel with system system based on shunt reactor large capacity quick switch cabinet according to claim 7, it is special
Levy and be, the impedance ratio of described current-carrying pontic FS and high-voltage and current-limitation fuse FU is 1 to 2000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620997177.8U CN205945010U (en) | 2016-08-30 | 2016-08-30 | Generator connecting in parallel with system system based on parallel reactor large capacity fast switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620997177.8U CN205945010U (en) | 2016-08-30 | 2016-08-30 | Generator connecting in parallel with system system based on parallel reactor large capacity fast switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205945010U true CN205945010U (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620997177.8U Active CN205945010U (en) | 2016-08-30 | 2016-08-30 | Generator connecting in parallel with system system based on parallel reactor large capacity fast switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205945010U (en) |
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2016
- 2016-08-30 CN CN201620997177.8U patent/CN205945010U/en active Active
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