CN203798982U - Switch electric life test loop for extra-high voltage substation reactive compensation - Google Patents
Switch electric life test loop for extra-high voltage substation reactive compensation Download PDFInfo
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- CN203798982U CN203798982U CN201420155832.6U CN201420155832U CN203798982U CN 203798982 U CN203798982 U CN 203798982U CN 201420155832 U CN201420155832 U CN 201420155832U CN 203798982 U CN203798982 U CN 203798982U
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- transformer
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- test loop
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- 238000012360 testing method Methods 0.000 title claims abstract description 46
- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model provides a switch electric life test loop for extra-high voltage substation reactive compensation. The secondary side high voltage terminal of a first transformer is connected with a protection circuit breaker, a first electric reactor, a closing switch, a first auxiliary switch, an operation switch, a first capacitor, a resistor, the secondary side of a second transformer and the secondary side low voltage terminal of the first transformer in series in sequence to form a loop. The common node of the protection circuit breaker and the first electric reactor is connected with the primary side low voltage terminal of the second transformer. The secondary side low voltage terminal of the first transformer is connected with the primary side high voltage terminal of the second transformer and a grounding point. A switch to be tested is bridged between the grounding point and the common node of the first auxiliary switch and the operation switch. The high voltage terminal of the switch to be tested is connected with a second auxiliary switch, a second electric reactor, a second capacitor and the grounding point in series in sequence to form a loop. The test loop can save test capacity; the closing-separating operation of the switch can be carried out in one test without switching the test loop frequently; and thus the test efficiency is improved.
Description
Technical field
The utility model belongs to high-voltage switch gear high-power test field, particularly relates to a kind of switch electrical endurance test loop for ultra-high voltage transformer station reactive-load compensation.
Background technology
Idle profit and loss in ultra-high voltage AC transmission system have variation by a relatively large margin, and wherein the capacitor group of three sides of switching main transformer is important means of idle adjusting.At present, in extra-high voltage engineering, capacitor group rated voltage reaches 110kV, it is even higher that single group capacitor capacity reaches 210Mvar, reactive-load compensation special switch has also been used 126kV switchgear first, capacitor group rated voltage is high, capacity is large, special switch needs frequent operation, and operating condition is harsh.
The dropout current increasing, close process prebreakdown ablation, the factor such as operation makes definite purpose circuit breaker operating condition very harsh frequently, once exceeding life span uses, bang very easily occurs wears, to directly threaten the insulating property of capacitor group, cause a hidden trouble to the safe operation of extra-high voltage grid.Therefore, the electrical endurance test of carrying out special switch opening-closing capacitor bank is particularly urgent, and existing national standard this pilot project not, and under the condition of laboratory finite capacity, be difficult to carry out this test, even if carry out and will realize " close-minute " operation, need frequently to switch test loop, test efficiency is low.
Utility model content
For the defect of prior art, the purpose of this utility model is to propose a kind of without frequently switching test loop, to improve the electrical endurance test loop of carrying out special switch opening-closing capacitor bank of test efficiency.
In order to solve above technical matters, the utility model adopts following technical scheme to realize.
A switch electrical endurance test loop for ultra-high voltage transformer station reactive-load compensation, comprising: network electric power, and the first transformer, first, second, third voltage sensor and first, second, third current sensor,
Described the first Circuit Fault on Secondary Transformer high-pressure side is in series and forms loop with protective breaker, the first reactor, closing switch, the first auxiliary switch, operating switch, the first capacitor, resistor, the second Circuit Fault on Secondary Transformer and the first Circuit Fault on Secondary Transformer low pressure end successively;
The common node of described protective breaker and the first reactor connects the second transformer primary side low pressure end;
Described the first Circuit Fault on Secondary Transformer low pressure end is connected with earth point with the second transformer primary side high-pressure side respectively;
Describedly treat that runin is closed and be connected across between earth point and the first auxiliary switch and the common node of operating switch; Describedly treat that runin closes high-pressure side and be in series and form loop with the second auxiliary switch, the second reactor, the second capacitor and earth point successively;
Described the first voltage sensor is arranged on the common node of the first auxiliary switch and operating switch, and second voltage sensor setting is at the second Circuit Fault on Secondary Transformer high-pressure side, and tertiary voltage sensor setting is at the common node of the first reactor and closing switch;
Described the first current sensor detects by the electric current of the first auxiliary switch, and the second current sensor detects the electric current by treating that runin is closed, and the 3rd current sensor detects the second transformer output current.
Further, described the second Circuit Fault on Secondary Transformer is parallel with the first lightning arrester.
Further, described the first capacitor two ends are parallel with the second lightning arrester, and the first capacitor two ends are parallel with discharging resistor.
Further, between described closing switch and the first auxiliary switch common node and earth point, be parallel with protection gap.
Compared with prior art, the beneficial effects of the utility model are:
The second capacitor, the second reactor, the second auxiliary switch for the utility model, treat that runin closes the loop forming and carry out making test; Utilize the first transformer that the most test current that cut-offs is provided, the second transformer provides fraction dropout current and full recovery voltage; Can utilize the experiment power supply of finite capacity to carry out the test of special switch opening-closing capacitor bank, save capacity of experiment; And special switch " close-minute " operate and can in single test, carry out, without frequently switching test loop, improved the efficiency of test.
Accompanying drawing explanation
Fig. 1 is that the utility model carries out special switch opening-closing capacitor bank electrical endurance test schematic diagram;
In figure: S-network electric power; T1-the first transformer; BD-protective breaker; Lc-the first reactor; HK-closing switch; FK1-the first auxiliary switch; CD-operating switch; Cv-the first capacitor; Rv-resistor; Rf-discharging resistor; P2-the second lightning arrester; P1-the first lightning arrester; T2-the second transformer; SP-treats runin pass; FK2-the second auxiliary switch; Lh-the second reactor; Ch-the second capacitor; BQ-protects gap; V1-the first voltage sensor; V2-second voltage sensor; V3-tertiary voltage sensor; A1-the first current sensor; A2-the second current sensor; A3-the 3rd current sensor.
Embodiment
With reference to Fig. 1, the second capacitor Ch and the second reactor Lh, before test, give in advance the second capacitor Ch charging, power supply when both combine as making test, S is network electric power, the first transformer T1 primary side is in parallel with power supply S, the first transformer T1 secondary side high-pressure side series connection protection switch BD, the second transformer T2 primary side is by protection switch BD and the first transformer T1 secondary side inverse parallel, the first transformer T1 secondary side low pressure end ground connection, two extension lines of the first transformer T1 secondary side, as cut-offfing when test current source output terminal, two extension lines of the second transformer T2 secondary side, as cut-offfing when test voltage output terminal.
The making test power output end second auxiliary switch FK2 that connects successively, treat runin pass SP, form loop, provide the high frequency while closing to shove, cut-off the test current source output terminal protection switch BD that connects successively, the first reactor Lc, closing switch HK, the first auxiliary switch FK, treat runin pass SP, the first transformer T1 secondary side low pressure end forms loop, the most of test current that cut-offs test is provided, cut-off trial voltage source output terminal resistors in series Rv successively, the first capacitor Cv, operating switch CD, treat runin pass SP, the second transformer T2 secondary side low pressure end forms loop, provide and cut-off test portion test current and full recovery voltage.
The first lightning arrester P1 of the second transformer T2 secondary side parallel connection, for limiting the second transformer T2 secondary side superpotential; The second lightning arrester P2 of the first capacitor Cv two ends parallel connection, for limiting the first capacitor Cv two ends superpotential; Between the common node of closing switch HK and the first auxiliary switch FK and earth point, be parallel with protection gap BQ, for limiting the superpotential of the first transformer T1 secondary side.
The first voltage sensor V1 is arranged on the first auxiliary switch FK1 and operating switch CD common node, second voltage sensor V2 is arranged on the second transformer T2 secondary side high-pressure side, and tertiary voltage sensor V3 is arranged on the first reactor Lc and closing switch HK common node; Described the first current sensor A1 detects by the electric current of the first auxiliary switch FK1, and the second current sensor A2 detects by treating the electric current of runin pass SP, and the 3rd current sensor A3 detects the second transformer T2 output current.
While testing, charge to specified making test voltage first to the second capacitor Ch, now closing switch HK, the first auxiliary switch FK1, treat that SP is closed in runin, the second auxiliary switch FK2, operating switch CD are all in gate-dividing state, by test routine, first close the second auxiliary switch FK2, after close and treat that runin closes SP, treat that runin closes SP and close and meet shoving of set peak value and frequency requirement, the second auxiliary switch FK2 and treat that runin closes successively separating brake of SP after 0.1 second.According to test routine, successively by protection switch BD, the first auxiliary switch FK1, treat that runin closes SP and close a floodgate, then close closing switch HK, treat that it is idle-loaded switching-on that SP is closed in runin; Treat before the SP separating brake of runin pass, close operating switch CD in good time, treat the electric current that runin pass SP provides jointly by the first transformer T2 and the second transformer T2, this electric current is specified dropout current, after 0.1 second, the first auxiliary switch FK1 and treat that runin closes SP separating brake, now treats that runin closes SP and cut-off rated current, treats that runin closes the recovery voltage that standard-required is born at SP two ends.Until runin close SP cut-off after 0.3 second, operating switch CD, closing switch HK, protection switch BD separating brake, this off-test, all devices restPoses, for test next time is prepared.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; in conjunction with above-described embodiment, the utility model is had been described in detail; those of ordinary skill in the field are to be understood that: those skilled in the art still can modify or be equal to replacement embodiment of the present utility model, but among the claim protection domain that these modifications or change are all awaited the reply in application.
Claims (4)
1. for a switch electrical endurance test loop for ultra-high voltage transformer station reactive-load compensation, it is characterized in that, this test loop comprises: network electric power, and the first transformer, first, second, third voltage sensor and first, second, third current sensor,
Described the first Circuit Fault on Secondary Transformer high-pressure side is in series and forms loop with protective breaker, the first reactor, closing switch, the first auxiliary switch, operating switch, the first capacitor, resistor, the second Circuit Fault on Secondary Transformer and the first Circuit Fault on Secondary Transformer low pressure end successively;
The common node of described protective breaker and the first reactor connects the second transformer primary side low pressure end;
Described the first Circuit Fault on Secondary Transformer low pressure end is connected with earth point with the second transformer primary side high-pressure side respectively;
Describedly treat that runin is closed and be connected across between earth point and the first auxiliary switch and the common node of operating switch; Describedly treat that runin closes high-pressure side and be in series and form loop with the second auxiliary switch, the second reactor, the second capacitor and earth point successively;
Described the first voltage sensor is arranged on the common node of the first auxiliary switch and operating switch, and second voltage sensor setting is at the second Circuit Fault on Secondary Transformer high-pressure side, and tertiary voltage sensor setting is at the common node of the first reactor and closing switch;
Described the first current sensor detects by the electric current of the first auxiliary switch, and the second current sensor detects the electric current by treating that runin is closed, and the 3rd current sensor detects the second transformer output current.
2. test loop according to claim 1, is characterized in that, described the second Circuit Fault on Secondary Transformer is parallel with the first lightning arrester.
3. test loop according to claim 1, is characterized in that, described the first capacitor two ends are parallel with the second lightning arrester and discharging resistor.
4. test loop according to claim 1, is characterized in that, is parallel with protection gap between the common node of described closing switch and the first auxiliary switch and earth point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420155832.6U CN203798982U (en) | 2014-04-02 | 2014-04-02 | Switch electric life test loop for extra-high voltage substation reactive compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420155832.6U CN203798982U (en) | 2014-04-02 | 2014-04-02 | Switch electric life test loop for extra-high voltage substation reactive compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203798982U true CN203798982U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420155832.6U Expired - Lifetime CN203798982U (en) | 2014-04-02 | 2014-04-02 | Switch electric life test loop for extra-high voltage substation reactive compensation |
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| Country | Link |
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| CN (1) | CN203798982U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110376515A (en) * | 2019-07-10 | 2019-10-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of DC high-speed switch direct current sky fills current breaking test method |
-
2014
- 2014-04-02 CN CN201420155832.6U patent/CN203798982U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110376515A (en) * | 2019-07-10 | 2019-10-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of DC high-speed switch direct current sky fills current breaking test method |
| CN110376515B (en) * | 2019-07-10 | 2021-11-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | DC high-speed switch DC air charging current on-off test method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140827 |
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| CX01 | Expiry of patent term |