CN208908362U - A kind of regional power grid excitation surge current elimination system - Google Patents
A kind of regional power grid excitation surge current elimination system Download PDFInfo
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- CN208908362U CN208908362U CN201820948218.3U CN201820948218U CN208908362U CN 208908362 U CN208908362 U CN 208908362U CN 201820948218 U CN201820948218 U CN 201820948218U CN 208908362 U CN208908362 U CN 208908362U
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- 230000005284 excitation Effects 0.000 title claims abstract description 57
- 238000003379 elimination reaction Methods 0.000 title abstract description 6
- 239000002283 diesel fuel Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 3
- 206010033799 Paralysis Diseases 0.000 abstract 1
- 230000000994 depressed Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001429 stepping Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000001131 transforming Effects 0.000 description 2
- 230000001052 transient Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000003068 static Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The utility model discloses a kind of regional power grid excitation surge current elimination system, the regional power grid includes system side bus (300), transformer (9) and excitation bus, the transformer (9) includes high voltage side of transformer (100) and step down side (200), the system side bus (300) is electrical connected with the high voltage side of transformer (100), the excitation bus is electrical connected with the step down side (100), it includes diesel-driven generator (14) that the excitation surge current, which eliminates system, the diesel-driven generator (14) is connected with the excitation bus and is connected in parallel on step down side (200), the step down side (200) is powered by the diesel-driven generator (14).Influence of the excitation surge current to regional power grid when the utility model completely eliminates transformer impact, is solved perfectly the problem of causing network system to be paralysed because of excitation surge current when regional power grid impacts high-power transformer.
Description
Technical field
The utility model relates to electrical power distribution electrical domain, in particular to a kind of regional power grid excitation surge current eliminates system.
Background technique
With the fast development of industrial economy, Construction of Industrial Park is in full flourish.According to industrial park power demands situation,
And consider Business Economic Benefit, garden using power plant for self-supply power, formation micro-capacitance sensor promote and apply at home it is more and more extensive,
But garden power plant for self-supply carries out regional power grid operational mode, for national grid, system realm electrical network capacity is inclined
It is small, when put into operation high-power transformer when, transformer in impact process due to the presence of transient state magnetic flux, cause its impact moment
May magnetic saturation to generate very high excitation surge current will cause the impact to regional power grid, in some instances it may even be possible to lead to system watt
Solution.
Utility model content
The purpose of this utility model is that in view of the above-mentioned drawbacks in the prior art, providing a kind of regional power grid excitation surge current
Elimination system, can eliminating transformer impact when influence of the excitation surge current to system, regional power grid impact large capacity is solved perfectly and becomes
The problem of leading to systemic breakdown because of excitation surge current when depressor.
For achieving the above object, the utility model adopts the technical scheme that a kind of regional power grid excitation surge current
Elimination system, the regional power grid include system side bus, transformer and excitation bus, and the transformer includes transformer high-voltage
Side and step down side, the system side bus are electrical connected with the high voltage side of transformer, the excitation bus with it is described
Step down side is electrical connected, and it includes diesel-driven generator that the excitation surge current, which eliminates system, the diesel-driven generator with it is described
Excitation bus is connected and is connected in parallel on step down side, and the step down side is powered by the diesel-driven generator.
In addition, the utility model also proposes following attached technical scheme: the diesel-driven generator and the excitation bus phase
Even and it is connected in parallel on step down side, the 6th breaker, the diesel oil are provided between the diesel-driven generator and excitation bus
The electric power that generator issues is put into or is resected to the excitation bus by the 6th breaker.
The voltage rating of the diesel-driven generator output is identical as the voltage rating of step down side.
It is defeated through the excitation bus to control that the 4th breaker is provided between the step down side and excitation bus
It is sent to step down side electric power.
The regional power grid includes system side bus, and the system side bus is electrical connected with the high voltage side of transformer.
It is provided with the second breaker and the 6th disconnecting switch between the high voltage side of transformer and system side bus, described second
Breaker is delivered to the electric power of the high voltage side of transformer to put into or cut off by the system side bus.
A kind of method that power grid excitation surge current in application region eliminates system, specifically comprises the following steps:
S1: provide: diesel-driven generator, high voltage side of transformer, step down side, the second breaker, third breaker and
4th breaker confirms the second breaker, the third breaker of the transformer high-low-voltage side before the diesel-driven generator starting
With the 4th breaker in quartile.
S2: provide: the 6th breaker, first the 6th breaker of closing in sequence and transformer are low before the diesel-driven generator operation
4th breaker of pressure side makes the voltage of the step down side to be impacted boost to voltage rating from zero, realizes stable state
The slow promotion of magnetic flux is to eliminate excitation surge current.
S3: after the step down side rises to voltage rating, the high voltage side of transformer voltage and the regional power grid
Voltage is equal, and the second breaker is closed, by bavin hair power supply and regional power grid power supply synchronization paralleling.
S4: after the diesel-driven generator and the regional power grid realize synchronization paralleling, diesel generation is slowly reduced manually
The power of machine is finally down to zero, successively separated the 6th of the 4th breaker of step down side and diesel-driven generator output end
Breaker, excitation surge current eliminate system Safe withdrawing.
Compared with the prior art, utility model has the advantages that diesel-driven generator drives transformer stepping up from zero, transformation
Device high side voltage is equal with regional power grid system voltage, by the way that diesel-driven generator hair power supply and regional power grid power supply is same
Phase is arranged side by side, avoids the full voltage idle-loaded switching-on of transformer, influence of the excitation surge current to system when completely eliminating transformer impact.
Detailed description of the invention
Fig. 1 is the utility model regional power grid electrical system schematic diagram.
Fig. 2 is that the utility model excitation surge current eliminates system and power grid connection schematic diagram.
Fig. 3 is that the utility model excitation surge current eliminates system partial enlarged view.
Specific embodiment
In conjunction with the preferred embodiment and its attached drawing is further unrestricted detailed to technical solutions of the utility model work
Explanation.
It is as shown in Figure 1 existing regional power grid electrical system, first, second, third and fourth, five, six disconnecting switch are below
220KV disconnecting switch, the first, second breaker are 220KV breaker, third and fourth, five, six breakers be 10KV open circuit
Device, the electrical system includes interconnection, the system side bus 300 that is electrical connected with interconnection, electrically connects with system side bus
The transformer 9 connect is provided with the second breaker 7 and the 6th disconnecting switch 8 between high voltage side of transformer 100 and system side bus 300
The electric power for being transported to from system side bus 300 transformer 9 to control investment or cut off, one's respective area power grid electrical system is double female
Line power supply, is equipped with the first disconnecting switch 1 and the first breaker 2, the first system side bus between interconnection and system side bus 300
301 and second are provided with third disconnecting switch 4 and the 4th disconnecting switch 5, second system side bus 302 and second between breaker 7
It is provided with the second disconnecting switch 3 and the 5th disconnecting switch 6 between breaker 7, realizes two bus mutual backup.Electric power is through system side
Bus 300 is transmitted to transformer 9, then by transformer 9 using 220KV voltage step-down to 10KV as station service, excitation bus root
Several distribution branches are separated according to actual needs to use for electrical appliance.Interconnection one, interconnection two and each electric component mode of connection
Identical, for the present embodiment by being illustrated to interconnection one, interconnection two can equally reach required purpose.
As shown in Figure 2 and Figure 3 to install the electrical system after excitation surge current elimination system additional, excitation surge current system includes diesel oil
Generator 14, diesel-driven generator 14 is connected with the excitation bus and is connected in parallel on step down side 200, specifically, diesel oil
14 output end of generator is connected with excitation bus, between be provided with the 6th breaker 13 to control diesel-driven generator 14 issue
Electric power investment or be resected to excitation bus, diesel-driven generator 14 is delivered in excitation bus after generating electricity, and realizes diesel-driven generator
14 pairs of step down sides 200 are powered, in addition, the 4th breaker 11 is provided between excitation bus and step down side 200, when
When excitation surge current system overall startup, the 6th breaker 13 and step down side 200 of 14 front end of diesel-driven generator need to be closed
The 4th breaker 11, diesel-driven generator 14 can drive 9 overall startup of transformer.
Further, the voltage rating that diesel-driven generator 14 exports is identical as the voltage rating of step down side 200, when
When eliminating system using excitation surge current, confirmation the second breaker 7 of 9 high and low pressure side of transformer, third breaker 10 and the are checked
Four breakers 11 are in quartile, and the 6th disconnecting switch 8 of high voltage side of transformer 100 and the 4th disconnecting switch 5 have been become reconciled, at this time
Close the 4th breaker 11 that diesel-driven generator 14 exports the 6th breaker 13 and step-down side 200, diesel-driven generator packet
Controller (not shown) is included, diesel-driven generator 14 is started by controller, when 14 stepping up from zero of diesel-driven generator is slowly increased to volume
When constant voltage, the voltage of 100 inductive output of high voltage side of transformer also gradually rises to the specified electricity of high voltage side of transformer 100 at this time
Pressure, when 100 voltage of high voltage side of transformer be high-pressure side voltage rating, diesel-driven generator 14 is switched to and determines power mode, transformation
100 voltage of device high-pressure side is equal with regional power grid system voltage, ensures diesel-driven generator by adjusting 14 revolving speed of diesel-driven generator
14 power supplies are identical as regional power grid supply frequency, then close the second breaker 7, diesel-driven generator 14 and regional power grid
Realize synchronization paralleling, when the second breaker 7 closes a floodgate, had been established steady magnetic field in transformer core, transformer 9 close a floodgate without
Transient process is crossed, does not generate excitation surge current in winding.Last Safe withdrawing diesel-driven generator 14, it is preferred that slowly reduce manually
The power of diesel-driven generator 14, is finally down to zero.Successively separate the 4th breaker 11 and diesel oil hair of step down side 200
6th breaker 13 of 14 output end of motor, so far, excitation surge current eliminate system Safe withdrawing, and regional power grid system bio-occlusion becomes
Depressor 9 is powered, and avoids the full voltage idle-loaded switching-on of transformer 9, static exciter bus through third breaker 10 can tape splicing it is negative
It carries.
The utility model has the beneficial effects that diesel-driven generator drives transformer stepping up from zero, high voltage side of transformer induction
Output voltage also gradually rises to voltage rating, and high voltage side of transformer voltage is equal with regional power grid system voltage at this time, then leads to
High voltage side of transformer switch is crossed by diesel-driven generator hair power supply and regional power grid power supply synchronization paralleling, avoids transformer
Full voltage idle-loaded switching-on, influence of the excitation surge current to system when completely eliminating transformer impact, solves regional power grid and impacts great Rong
The problem of leading to systemic breakdown because of excitation surge current when quantitative change depressor.
It should be pointed out that above-mentioned preferred embodiment is only to illustrate the technical ideas and features of the present invention, purpose
It is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly, this reality can not be limited with this
With novel protection scope.All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover in this reality
Within novel protection scope.
Claims (5)
1. a kind of regional power grid excitation surge current eliminates system, the regional power grid includes system side bus (300), transformer (9)
With excitation bus, the transformer (9) includes high voltage side of transformer (100) and step down side (200), and the system side is female
Line (300) is electrical connected with the high voltage side of transformer (100), the excitation bus and the step down side (200) electricity
Property be connected, it is characterised in that: it includes diesel-driven generator (14) that the excitation surge current, which eliminates system, the diesel-driven generator (14) with
The excitation bus is connected and is connected in parallel on step down side (200), and the step down side (200) passes through the diesel oil
Generator (14) power supply.
2. regional power grid excitation surge current eliminates system according to claim 1, it is characterised in that: the diesel-driven generator (14)
The 6th breaker (13) is provided between excitation bus, the electric power that the diesel-driven generator (14) issues passes through the 6th open circuit
Device (13) puts into or is resected to the excitation bus.
3. regional power grid excitation surge current eliminates system according to claim 2, it is characterised in that: the diesel-driven generator (14)
The voltage rating of output is identical as the voltage rating of step down side (200).
4. regional power grid excitation surge current eliminates system according to claim 1, it is characterised in that: the step down side
(200) it is provided with the 4th breaker (11) between excitation bus and is transported to step down side through the excitation bus to control
(200) electric power.
5. regional power grid excitation surge current eliminates system according to claim 1, it is characterised in that: the high voltage side of transformer
(100) the second breaker (7) and the 6th disconnecting switch (8), second breaker are provided between system side bus (300)
(7) electric power of the high voltage side of transformer (100) is delivered to by the system side bus (300) to put into or cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820948218.3U CN208908362U (en) | 2018-06-20 | 2018-06-20 | A kind of regional power grid excitation surge current elimination system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820948218.3U CN208908362U (en) | 2018-06-20 | 2018-06-20 | A kind of regional power grid excitation surge current elimination system |
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| Publication Number | Publication Date |
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| CN208908362U true CN208908362U (en) | 2019-05-28 |
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| CN201820948218.3U Active CN208908362U (en) | 2018-06-20 | 2018-06-20 | A kind of regional power grid excitation surge current elimination system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165704A (en) * | 2019-05-29 | 2019-08-23 | 华润协鑫(北京)热电有限公司 | A kind of black-start method of power grid |
-
2018
- 2018-06-20 CN CN201820948218.3U patent/CN208908362U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165704A (en) * | 2019-05-29 | 2019-08-23 | 华润协鑫(北京)热电有限公司 | A kind of black-start method of power grid |
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