CN203759069U - Reactor switching system of voltage sag device - Google Patents
Reactor switching system of voltage sag device Download PDFInfo
- Publication number
- CN203759069U CN203759069U CN201420115631.3U CN201420115631U CN203759069U CN 203759069 U CN203759069 U CN 203759069U CN 201420115631 U CN201420115631 U CN 201420115631U CN 203759069 U CN203759069 U CN 203759069U
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- reactor
- pole double
- throw
- spdt
- disconnecting link
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Abstract
The utility model relates to a reactor switching system of voltage sag device. The system comprises a first single-pole double-throw switch, a second single-pole double-throw switch, a first reactor and a second reactor, wherein the first single-pole double-throw switch is connected with an electrical-network connection point, the second single-pole double-throw switch is connected with a short-circuit grounding point, tap joints of the first and second reactors are respectively connected with separate voltage testing wires, and the first or second reactor is connected by the first and second single-pole double-throw switches according to the voltage sag depth required for the voltage sag device. The first reactor includes five reactance sections, and the second reactor includes nine reactance sections. The reactor switching system enables that the two reactors of different reactance are switched and connected via the two single-pole double-throw switches, redundant configuration of reactors is avoided, and the cost of the whole voltage sag device is reduced.
Description
Technical field
The utility model relates to new forms of energy access and control field, particularly, relates to a kind of reactor switched system of voltage falling device.
Background technology
Since Eleventh Five-Year Plan, China's generation of electricity by new energy industry development is advanced by leaps and bounds, and wind-powered electricity generation adding new capacity is doubled year after year, and solar cell yield is to exceed 100% average growth rate per annum fast development.But China's new forms of energy, in fast-developing, be also faced with new forms of energy and access on a large scale quality and the safety problem that electrical network brings.In order to ensure the stable of the rear electrical network of the extensive access of the generation of electricity by new energy such as wind-powered electricity generation, photovoltaic generation, need to be in the situation that electrical network transient fault causes voltage rapid drawdown is to certain value at short notice, the generator unit such as wind-powered electricity generation, photovoltaic still can not depart from electrical network and operation continually and steadily, until power system restoration is normal, thereby " pass through " this low-voltage time, this ability is called as low voltage ride-through capability (Low Voltage RideThrough, LVRT).
Verify whether generator unit possesses low voltage ride-through capability, need to carry out the voltage that simulating grid fault causes by specific voltage falling device and fall.At present, the voltage falling device based on impedance short circuit voltage divider principle is widely used in low voltage crossing site test.From functional structure, impedance short circuit divided voltage falling device mainly comprises current limiting reactor, short-circuit reactance device and three functional parts of fling-cut switch cabinet.Fig. 1 shows the principle assumption diagram of existing voltage falling device.As shown in Figure 1, between voltage falling device series connection access electrical network and tested generator unit, drop into the current limiting reactor X1 with certain resistance value to reduce the impact of voltage fall-down test on electrical network by by-pass switch S1, drop into the short-circuit reactance device X2 with specified impedance value to produce short circuit malfunction by short circuiting switch cabinet S2, fall thereby produce voltage in test point.Test point voltage falls the degree of depth and equals the ratio of current-limiting impedance and resulting impedance, i.e. Udip=X1/ (X1+X2) * Un, and wherein, Udip is that voltage falls the degree of depth, Un is system rated voltage.In the time carrying out the test that different voltage falls the degree of depth, the quantity dropping into by changing current limiting reactor and short-circuit reactance device, just can change impedance dividing point, thus the degree of depth that change voltage falls.
Low voltage crossing testing standard requirement voltage falling device can produce voltage within the scope of 0%Un～90%Un and fall, and adjusts step-length and is 10%Un.Fig. 2 shows the reactor configuration structure of current voltage falling device.For meeting testing standard requirement, voltage falling device adopts two groups of identical reactors that possess 9 taps respectively as current-limiting reactor and short-circuit reactance conventionally, as shown in Figure 2, current-limiting reactor head end is directly connected with electrical network access point A point, and short-circuit reactance head end is directly connected with earth point D point.Utilize copper bar or cable the specific tap of current-limiting reactor and short-circuit reactance (B point and C point) to be accessed respectively to the dividing potential drop test point of test macro, thereby by required current-limiting reactor section and short-circuit reactance section access test macro, realize the short circuit of different impedanoe ratios.
Above-mentioned conventional equipment principle is simple, current limiting reactor and short-circuit reactance device function are fixed, for the voltage that produces different depth falls, conventionally need to configure respectively current limiting reactor and short-circuit reactance device that multiple function is single, in the time carrying out single test, there is the idle situation of many group reactors like this, caused the great redundancy waste of reactor, and increased the volume of equipment, more increase equipment cost.
Utility model content
The utility model provides a kind of reactor switched system of voltage falling device, use two cover single-pole double-throw type switching over disconnecting links, between the reactor of two groups of different sizes, carry out function switching, complete the voltage drop test of different depth, reduce the redundant configuration of reactor, and equipment volume is reduced, and reduced the cost of whole voltage falling device.
For this purpose, the utility model proposes a kind of reactor switched system of voltage falling device, it is characterized in that, described system comprises the first single-pole double-throw (SPDT) disconnecting link, the second single-pole double-throw (SPDT) disconnecting link, the first reactor and the second reactor, described the first single-pole double-throw (SPDT) disconnecting link is connected with electrical network, described the second single-pole double-throw (SPDT) disconnecting link is connected with short circuit grounding point, and the voltage that need to test according to described voltage falling device with described the second single-pole double-throw switch (SPDT) of described the first single-pole double-throw switch (SPDT) falls the degree of depth and selects to be connected described the first reactor and the second reactor; Wherein said the first reactor has 5 sections of reactance, and described the second reactor has 9 sections of reactance.
Wherein, using the reactor being connected with described the first single-pole double-throw (SPDT) disconnecting link as current limiting reactor, using the reactor being connected with described the second single-pole double-throw (SPDT) disconnecting link as short-circuit reactance device.
Wherein, when described voltage falls the degree of depth 90%～50% time, described the first single-pole double-throw (SPDT) disconnecting link is connected to described the first reactor, and described the first reactor is as current limiting reactor, described the second single-pole double-throw (SPDT) disconnecting link is connected to described the second reactor, and described the second reactor is as short-circuit reactance device.
Wherein, when described voltage falls the degree of depth 0%～50% time, described the first single-pole double-throw switch (SPDT) is connected to described the second reactor, described the second reactor is as described current limiting reactor, described the second single-pole double-throw (SPDT) disconnecting link is connected to described the first reactor, and described the first reactor is as described short-circuit reactance device.
Wherein, when described voltage falls the degree of depth 50% time, the first single-pole double-throw (SPDT) disconnecting link can select to connect described the first reactor or above-mentioned the second reactor any one as current limiting reactor, described the second single-pole double-throw (SPDT) disconnecting link connects as short-circuit reactance device with described the first reactor or the second reactor that are connected with described the first single-pole double-throw (SPDT) disconnecting link.
Beneficial effect
Use the reactor switched system of voltage falling device described in the utility model, the value that can be according to voltage drop test time, voltage falls the degree of depth is selected current limiting reactor and short-circuit reactance device, carry out the selection of reactor by single-pole double-throw (SPDT) disconnecting link simultaneously, simple and convenient in use, improve the dirigibility of reactor system, simultaneously, use the reactor of two different reactance, can reduce the volume of whole voltage falling device, reduce simultaneously and use reactant devices, avoid the redundancy waste of equipment, also reduced the cost of device.
Brief description of the drawings
Can more clearly understand feature and advantage of the present utility model by reference to accompanying drawing, accompanying drawing is schematically to should not be construed as the utility model is carried out to any restriction, in the accompanying drawings:
Fig. 1 shows the principle assumption diagram of existing voltage falling device.
Fig. 2 shows the reactor configuration structure of existing voltage falling device.
Fig. 3 is the schematic diagram that a kind of connected mode of the reactor switched system of voltage falling device described in the utility model is shown.
Fig. 4 is the schematic diagram of the another kind of connected mode of the reactor switched system of voltage falling device described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
Fig. 3 is the schematic diagram that a kind of connected mode of the reactor switched system of voltage falling device described in the utility model is shown.
With reference to Fig. 3, the reactor switched system system of the voltage falling device described in embodiment of the present utility model comprises the first single-pole double-throw (SPDT) disconnecting link K1, the second single-pole double-throw (SPDT) disconnecting link K2, the first reactor X3 and the second reactor X4.
The first single-pole double-throw (SPDT) disconnecting link K1 and the second single-pole double-throw (SPDT) disconnecting link K2 have identical structure, the connection that the first single-pole double-throw (SPDT) disconnecting link K1 and electrical network access point A are ordered, the connection that the second single-pole double-throw (SPDT) disconnecting link K2 and short circuit grounding point D are ordered.
In the present embodiment, the reactor being connected with the first single-pole double-throw (SPDT) disconnecting link K1 uses as current limiting reactor in voltage falling device, and the reactor being connected with the second single-pole double-throw (SPDT) disconnecting link K2 uses as short-circuit reactance device.
The first reactor X3 is the reactor with 5 sections of reactance, and the second reactor X4 is the reactor with 9 sections of reactance, and the tap of the first reactor X3 and the second reactor X4 is connected respectively to B point and the C point of dividing potential drop test point.The voltage that the first single-pole double-throw (SPDT) disconnecting link K1 need to test according to voltage falling device with the second single-pole double-throw (SPDT) disconnecting link K2 falls the degree of depth and selects to be connected described the first reactor X3 or the second reactor X4.
As shown in Figure 3, when the first single-pole double-throw (SPDT) disconnecting link K1 is connected to the first reactor X3, the first reactor X3 is as current limiting reactor, the second single-pole double-throw (SPDT) disconnecting link K2 is connected to the second reactor X4, the second reactor X4 is as short-circuit reactance device, by the tap of mobile the first reactor X3, can select the size of the value of current limiting reactor, now, the maximum access of electric current reactor is 5 sections of reactance, similarly, and by the tap of mobile the second reactor X4, can select the size of the value of short-circuit reactance device, the maximum access of short-circuit reactance device is 9 sections of reactance.
Fig. 4 is the schematic diagram of the another kind of connected mode of the reactor switched system of voltage falling device described in the utility model.
In the time that current limiting reactor need to access larger reactance, can be by the first single-pole double-throw (SPDT) disconnecting link K1 be connected with the second single-pole double-throw (SPDT) disconnecting link K2 exchange, as shown in Figure 4, the first single-pole double-throw (SPDT) disconnecting link K1 is connected with the second reactor X4, the second single-pole double-throw (SPDT) disconnecting link K2 is connected with the first reactor X3, now the second reactor X4 is current limiting reactor, and the first reactor X3 is short-circuit reactance device, and the access of the maximum of current limiting reactor is 9 sections of reactance like this.
Table 1 is the connected mode that current-limiting reactor and short-circuit reactance while adopting the voltage falling device of reactor switched system of the present embodiment to carry out voltage drop test within the scope of 0%Un～90%Un are shown.
As shown in table 1, when voltage falls the degree of depth 90%～50% time, the first single-pole double-throw (SPDT) disconnecting link K1 is connected to the first reactor X3, the second single-pole double-throw (SPDT) disconnecting link K2 is connected to the second reactor X4, at this moment, the first reactor is current limiting reactor, and the second reactor is short-circuit reactance device.
When voltage falls the degree of depth 0%～50% time, described the first single-pole double-throw switch (SPDT) is connected to described the second reactor, and described the second single-pole double-throw (SPDT) disconnecting link is connected to described the first reactor, at this moment, the second reactor is current limiting reactor, and the first reactor is short-circuit reactance device.
Simultaneously, as can be seen from Table 1, when falling the degree of depth 50% time, because the quantity of current limiting reactor and the access of short-circuit reactance device is all 5 sections of reactance, so now two reactors can connect arbitrarily, the first single-pole double-throw (SPDT) disconnecting link K1 both can be connected to the first reactor, using the first reactor X3 as current limiting reactor, also can be connected to the second reactor X4, using the second reactor X4 as current limiting reactor, meanwhile, another reactor is connected with the second single-pole double-throw (SPDT) disconnecting link K2, as short-circuit reactance device.
Known by above-described embodiment, use the reactor switched system of voltage falling device described in the utility model, the value that can be according to voltage drop test time, voltage falls the degree of depth is selected current limiting reactor and short-circuit reactance device, carry out the selection of reactor by single-pole double-throw (SPDT) disconnecting link simultaneously, simple and convenient in use, improve the dirigibility of reactor system, simultaneously, use the reactor of two different reactance, can reduce the volume of whole voltage falling device, reduce and use reactant devices simultaneously, avoided the redundancy waste of equipment, also reduced the cost of device.
Although described by reference to the accompanying drawings embodiment of the present utility model, but those skilled in the art can make various modifications and variations in the situation that not departing from spirit and scope of the present utility model, and such amendment and modification all fall into by within claims limited range.
Claims (5)
1. the reactor switched system of a voltage falling device, it is characterized in that, described system comprises the first single-pole double-throw (SPDT) disconnecting link, the second single-pole double-throw (SPDT) disconnecting link, the first reactor and the second reactor, described the first single-pole double-throw (SPDT) disconnecting link is connected with electrical network tie point, described the second single-pole double-throw (SPDT) disconnecting link is connected with short circuit grounding point, the tap of described the first reactor and described the second reactor is connected respectively to dividing potential drop p-wire, and the voltage that described the first single-pole double-throw switch (SPDT) and described the second single-pole double-throw switch (SPDT) need to produce according to described voltage falling device falls the degree of depth and selects to be connected to described the first reactor and described the second reactor, wherein, described the first reactor has 5 sections of reactance, and described the second reactor has 9 sections of reactance.
2. the reactor switched system of voltage falling device according to claim 1, it is characterized in that, using the reactor being connected with described the first single-pole double-throw (SPDT) disconnecting link as current limiting reactor, using the reactor being connected with described the second single-pole double-throw (SPDT) disconnecting link as short-circuit reactance device.
3. the reactor switched system of voltage falling device according to claim 2, it is characterized in that, when described voltage falls the degree of depth 90%～50% time, described the first single-pole double-throw (SPDT) disconnecting link is connected to described the first reactor, described the first reactor is as current limiting reactor, described the second single-pole double-throw (SPDT) disconnecting link is connected to described the second reactor, and described the second reactor is as short-circuit reactance device.
4. the reactor switched system of voltage falling device according to claim 2, it is characterized in that, when described voltage falls the degree of depth 0%～50% time, described the first single-pole double-throw switch (SPDT) is connected to described the second reactor, described the second reactor is as current limiting reactor, described the second single-pole double-throw (SPDT) disconnecting link is connected to described the first reactor, and described the first reactor is as short-circuit reactance device.
5. the reactor switched system of voltage falling device according to claim 2, it is characterized in that, when described voltage falls the degree of depth 50% time, described the first single-pole double-throw (SPDT) disconnecting link can select to connect described the first reactor or described the second reactor any one as current limiting reactor, described the second single-pole double-throw (SPDT) disconnecting link connects as short-circuit reactance device with described the first reactor or above-mentioned the second reactor that are connected with described the first single-pole double-throw (SPDT) disconnecting link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420115631.3U CN203759069U (en) | 2014-03-13 | 2014-03-13 | Reactor switching system of voltage sag device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420115631.3U CN203759069U (en) | 2014-03-13 | 2014-03-13 | Reactor switching system of voltage sag device |
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| Publication Number | Publication Date |
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| CN203759069U true CN203759069U (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420115631.3U Withdrawn - After Issue CN203759069U (en) | 2014-03-13 | 2014-03-13 | Reactor switching system of voltage sag device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941050A (en) * | 2014-03-13 | 2014-07-23 | 北京群菱能源科技有限公司 | Reactor switching system of voltage dropping device |
-
2014
- 2014-03-13 CN CN201420115631.3U patent/CN203759069U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941050A (en) * | 2014-03-13 | 2014-07-23 | 北京群菱能源科技有限公司 | Reactor switching system of voltage dropping device |
| CN103941050B (en) * | 2014-03-13 | 2016-06-22 | 北京群菱能源科技有限公司 | The reactor switched system of Voltage Drop device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140806 Effective date of abandoning: 20160622 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |