CN110865216A - Trap device for no-load test of +/-800 kV power transmission and transformation main equipment - Google Patents
Trap device for no-load test of +/-800 kV power transmission and transformation main equipment Download PDFInfo
- Publication number
- CN110865216A CN110865216A CN201911227378.4A CN201911227378A CN110865216A CN 110865216 A CN110865216 A CN 110865216A CN 201911227378 A CN201911227378 A CN 201911227378A CN 110865216 A CN110865216 A CN 110865216A
- Authority
- CN
- China
- Prior art keywords
- reactor
- power transmission
- main equipment
- load test
- test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model provides a +/-800 kV power transmission and transformation main equipment is trapped wave device for no-load test, relates to electrical test equipment technical field, and its structure is: the filter is formed by connecting a 3-order harmonic filter and a 5-order harmonic filter in parallel; the 3 rd harmonic filter and the 5 th harmonic filter are both formed by connecting a capacitor bank and a reactor in series. The invention has the beneficial effects that: when the voltage waveform correction factor d is used, the absolute value of the voltage waveform correction factor d and the voltage waveform distortion rate THD are both greatly reduced, the standard requirement can be met, the voltage waveform correction factor d is less than or equal to +/-3%, the 3-order harmonic filter and the 5-order harmonic filter are used in parallel, the capacity of a test power supply can be obviously reduced, and the auxiliary effect on a field test is realized.
Description
Technical Field
The invention relates to the technical field of electrical test equipment, in particular to a trap device for a +/-800 kV power transmission and transformation main equipment no-load test.
Background
When +/-800 kV power transmission and transformation main equipment performs a no-load test at 1.1 times of rated voltage, the requirement on the power supply capacity during a field test is high, and the good waveform of the voltage needs to be ensured. Usually, a capacitor is used for reactive compensation, but due to the particularity of the main equipment of the power transmission and transformation, the existing technology, such as the method for improving the power supply capacity and using the capacitor compensation, has poor effect on the actual no-load test.
The harmonic content of the no-load current of the power transmission and transformation main equipment is higher, the influence on the test voltage waveform of the no-load test is larger, the waveform control difficulty in the no-load test is larger, the harmonic current of 3 times, 5 times and 7 times accounts for the proportion of the fundamental wave current to be higher, so that the test voltage waveform is distorted, and the voltage waveform is difficult to reach the standard requirement in the no-load test.
In the prior art, for example, the capacity of a test power supply is increased, the requirement on field test conditions is very high, and the difficulty in field implementation is higher. The method of adopting the capacitor to perform reactive compensation on the basis of the capacity of the field allowable test power supply cannot properly reduce the capacity of the test power supply, has insignificant influence on the actual test result, and cannot enable the voltage waveform to reach the standard waveform. If a high-voltage filter is not used, the correction factor d of the waveform in the no-load test, and the relative deviation between the average value of the voltage and the effective value are not less than 3%, and the total harmonic content of the voltage is still higher.
If the requirement on the capacity of a test power supply during the no-load test of the main power transmission and transformation equipment is reduced only by using capacitance compensation according to the conventional no-load test method of the power transformer, the effect is not obvious because the capacitance only provides power frequency compensation current under the power frequency voltage similar to sine wave and has no practical effect on the generated harmonic current, so that the waveform correction factor d cannot be ensured to meet the standard requirement.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a trap device for a no-load test of +/-800 kV power transmission and transformation main equipment, which can solve the problems.
The invention provides a trap device for a no-load test of +/-800 kV power transmission and transformation main equipment, which is connected into a system after a fixed capacitor bank and a variable reactor are connected in series, namely, the trap device is carried out at the valve side or the low and medium voltage sides of a test article;
the device is formed by connecting a 3 rd harmonic filter and a 5 th harmonic filter in parallel; the 3 rd harmonic filter and the 5 th harmonic filter are both formed by connecting a capacitor bank and a reactor in series;
the capacitor bank is formed by connecting a plurality of capacitors in series, when the wiring mode of the test sample valve side is D connection, 10 identical capacitors are selected to be connected in series to form the capacitor bank, and when the wiring mode of the test sample valve side is Y connection, 7 identical capacitors are selected to be connected in series to form the capacitor bank.
The voltage at the bottommost part of the capacitor bank is the highest point and is a resonance point, and the resonance point is connected with one reactor or 2 reactors connected in series; the bottom of the reactor at the lowest end is directly grounded.
When the wiring mode of the test sample valve side is D connection, the resonance point is connected with 2 reactors connected in series, and the reactance values of the two reactors are different; when the wiring mode of the sample valve side is Y connection, the resonance point is connected with a reactor.
A plurality of taps are reserved in each reactor, and proper taps can be selected according to the field condition to finely adjust the reactance value of the reactor, so that the resonance frequencies of the two filters are close to 150Hz and 250Hz respectively;
the capacitors are all mounted on the fixed frame, a safety distance is reserved, and the position of the reactor can be adjusted according to specific conditions.
The 3-order and 5-order harmonic filters can realize switching by manually switching the high-voltage incoming busbar according to the reactive load demand and the harmonic content of the 3-order and 5-order harmonic filters, the 3-order branch is switched firstly during switching, and the 5-order branch is cut firstly during cutting.
The invention has the beneficial effects that: when a +/-800 kV power transmission and transformation main equipment no-load test is carried out, the wave trap device is used, the absolute value of the waveform correction factor d and the waveform distortion rate THD are both greatly reduced, and the standard requirement can be met so that the waveform correction factor d is less than or equal to +/-3%.
The waveform generated by the adopted filter is better if the capacity of the filter is larger, the waveform generated by the 3 rd harmonic filter and the 5 th harmonic filter which are connected in parallel is better than the waveform generated by the 3 rd harmonic filter which is used alone, if the capacity of the matched filter is in an optimal value, the capacity of a test power supply can be obviously reduced, and the auxiliary effect on a field test is realized.
Drawings
FIG. 1 is a circuit diagram of the present invention;
FIG. 2 is a schematic circuit diagram according to embodiment 1 of the present invention;
FIG. 3 is a schematic circuit diagram according to embodiment 2 of the present invention;
in the figure, a1-a2 are capacitor banks, and b1-b4 are reactors.
Detailed Description
Embodiment 1, as shown in the figure, the present invention provides a trap device for a no-load test of ± 800kV transmission and transformation main equipment, a test sample valve side adopts a D connection mode, a 3-th harmonic filter capacitor bank is formed by connecting 10 capacitors with a parameter of 1376nF/35kV in series, a voltage at the bottommost of the series capacitor bank is a highest point, and the point is a connection point with a reactor and is a resonance point.
The 3-order harmonic filter reactor selects two reactors with reactance values of 2.454H +/-10% and 5.727H +/-10% to be used in series, three taps are reserved for each reactor, and fine adjustment can be performed during field test. In the figure, an L3-1 reactor is overhead or placed above an L3-2 reactor, and the bottom of the L3-2 reactor is directly grounded.
The 5 th harmonic filter capacitor bank is composed of 10 capacitors with a single parameter of 516nF/30kV in series, and is similar to the 3 rd harmonic filter.
The 5 th harmonic filter reactor selects two reactors with reactance values of 2.356H +/-10% and 5.498H +/-10% to be used in series, and the mode is similar to that of the 3 rd harmonic filter.
A plurality of taps are reserved in each reactor, and proper taps can be selected according to the field condition to finely adjust the reactance value of the reactor, so that the resonance frequencies of the two filters are close to 150Hz and 250Hz respectively;
the capacitors are all mounted on the fixed frame, a safety distance is reserved, and the position of the reactor can be adjusted according to specific conditions.
The 3-time branch circuit and the 5-time branch circuit can realize switching by manually switching the high-voltage incoming busbar according to the reactive demand of the load and the harmonic content of the load for 3 times and 5 times, the 3-time branch circuit is firstly switched during switching, and the 5-time branch circuit is firstly switched during switching.
All the capacitors used can continuously operate at 1.3 times of rated current, and the capacitor with the largest positive deviation can continuously operate at 1.43 times of rated current, and the capacitor can bear inrush current impact of 100 times of rated current. The reactor can be adjusted properly through the arranged taps, so that the resonant frequencies of the two filters are 150Hz and 250Hz respectively, the two groups of filters are integrated into a test system, and then the no-load test of the power transmission and transformation main equipment can be carried out.
The 3 rd harmonic filter reactor is used by selecting a reactor with a reactance value of 5.727H +/-10%, three taps are reserved for each reactor, and fine adjustment can be performed during field test. In the figure, the top end of the L3-2 reactor is connected with the bottom of the capacitor, and the bottom of the L3-2 reactor is directly grounded.
The 5 th harmonic filter capacitor bank is composed of 7 capacitors with a single parameter of 516nF/30kV in series, and is similar to the 3 rd harmonic filter.
The reactor of the 5 th harmonic filter is selected to have a reactance value of 5.498H +/-10%, and the mode is similar to that of the 3 rd harmonic filter.
A plurality of taps are reserved in each reactor, and proper taps can be selected according to the field condition to finely adjust the reactance value of the reactor, so that the resonance frequencies of the two filters are close to 150Hz and 250Hz respectively;
the capacitors are all mounted on the fixed frame, a safety distance is reserved, and the position of the reactor can be adjusted according to specific conditions.
The 3-time branch circuit and the 5-time branch circuit can realize switching by manually switching the high-voltage incoming busbar according to the reactive demand of the load and the harmonic content of the load for 3 times and 5 times, the 3-time branch circuit is firstly switched during switching, and the 5-time branch circuit is firstly switched during switching.
All the capacitors used can continuously operate at 1.3 times of rated current, and the capacitor with the largest positive deviation can continuously operate at 1.43 times of rated current, and the capacitor can bear inrush current impact of 100 times of rated current. The reactor can be adjusted properly through the arranged taps, so that the resonant frequencies of the two filters are 150Hz and 250Hz respectively, the two groups of filters are integrated into a test system, and then the no-load test of the power transmission and transformation main equipment can be carried out.
Claims (7)
1. The utility model provides a +/-800 kV power transmission and transformation main equipment is trapped wave device for no-load test which characterized in that: the filter is formed by connecting a 3-order harmonic filter and a 5-order harmonic filter in parallel; the 3 rd harmonic filter and the 5 th harmonic filter are both formed by connecting a capacitor bank and a reactor in series.
2. The notch device for the no-load test of the +/-800 kV power transmission and transformation main equipment as claimed in claim 1, wherein: the capacitor bank is formed by connecting a plurality of capacitors in series, when the wiring mode of the test sample valve side is D connection, 10 identical capacitors are selected to be connected in series to form the capacitor bank, and when the wiring mode of the test sample valve side is Y connection, 7 identical capacitors are selected to be connected in series to form the capacitor bank.
3. The notch device for the no-load test of the +/-800 kV power transmission and transformation main equipment as claimed in claim 2, wherein: the voltage at the bottommost part of the capacitor bank is the highest point and is a resonance point, and the resonance point is connected with one reactor or 2 reactors connected in series; the bottom of the reactor at the lowest end is directly grounded.
4. The notch device for the no-load test of the +/-800 kV power transmission and transformation main equipment as claimed in claim 3, wherein: when the wiring mode of the test sample valve side is D connection, the resonance point is connected with 2 reactors connected in series, and the reactance values of the two reactors are different; when the wiring mode of the sample valve side is Y connection, the resonance point is connected with a reactor.
5. The notch device for the no-load test of the +/-800 kV power transmission and transformation main equipment as claimed in claim 4, wherein: a plurality of taps are reserved in each reactor, and proper taps can be selected according to the field condition to finely adjust the reactance value of the reactor, so that the resonant frequencies of the two filters are close to 150Hz and 250Hz respectively.
6. The notch device for the no-load test of the +/-800 kV power transmission and transformation main equipment as claimed in claim 5, wherein: the capacitors are all mounted on the fixed frame, a safety distance is reserved, and the position of the reactor can be adjusted according to specific conditions.
7. The notch device for the no-load test of the +/-800 kV power transmission and transformation main equipment as claimed in claim 6, wherein: the 3-order and 5-order harmonic filters can realize switching by manually switching the high-voltage incoming busbar according to the reactive load demand and the harmonic content of the 3-order and 5-order harmonic filters, the 3-order branch is switched firstly during switching, and the 5-order branch is cut firstly during cutting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911227378.4A CN110865216A (en) | 2019-12-04 | 2019-12-04 | Trap device for no-load test of +/-800 kV power transmission and transformation main equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911227378.4A CN110865216A (en) | 2019-12-04 | 2019-12-04 | Trap device for no-load test of +/-800 kV power transmission and transformation main equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110865216A true CN110865216A (en) | 2020-03-06 |
Family
ID=69657333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911227378.4A Pending CN110865216A (en) | 2019-12-04 | 2019-12-04 | Trap device for no-load test of +/-800 kV power transmission and transformation main equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110865216A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325024A (en) * | 2021-12-29 | 2022-04-12 | 海华电子企业(中国)有限公司 | Method for testing tuning parameters of efficient trap filter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630841A (en) * | 2009-08-18 | 2010-01-20 | 武汉理工大学 | Dynamic harmonic filter |
| US7800380B1 (en) * | 2007-08-24 | 2010-09-21 | Keithley Instruments Inc. | High capacitance load testing |
| CN102818949A (en) * | 2012-07-17 | 2012-12-12 | 杭州银湖电气设备有限公司 | Full-load testing device for magnetically controlled reactors |
| CN103187728A (en) * | 2012-12-26 | 2013-07-03 | 江阴华明电气设备有限公司 | Filter device for controlling harmonic wave of electric power system |
| CN103543362A (en) * | 2013-10-31 | 2014-01-29 | 国家电网公司 | Selecting method of filters in extra-high voltage transformer no-load test |
| CN105182103A (en) * | 2015-07-21 | 2015-12-23 | 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 | Converter transformer symmetrical voltage boosting no-load test circuit |
-
2019
- 2019-12-04 CN CN201911227378.4A patent/CN110865216A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7800380B1 (en) * | 2007-08-24 | 2010-09-21 | Keithley Instruments Inc. | High capacitance load testing |
| CN101630841A (en) * | 2009-08-18 | 2010-01-20 | 武汉理工大学 | Dynamic harmonic filter |
| CN102818949A (en) * | 2012-07-17 | 2012-12-12 | 杭州银湖电气设备有限公司 | Full-load testing device for magnetically controlled reactors |
| CN103187728A (en) * | 2012-12-26 | 2013-07-03 | 江阴华明电气设备有限公司 | Filter device for controlling harmonic wave of electric power system |
| CN103543362A (en) * | 2013-10-31 | 2014-01-29 | 国家电网公司 | Selecting method of filters in extra-high voltage transformer no-load test |
| CN105182103A (en) * | 2015-07-21 | 2015-12-23 | 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 | Converter transformer symmetrical voltage boosting no-load test circuit |
Non-Patent Citations (1)
| Title |
|---|
| 刘会林 等: "《电弧炉短流程炼钢设备与技术》", 31 January 2012 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325024A (en) * | 2021-12-29 | 2022-04-12 | 海华电子企业(中国)有限公司 | Method for testing tuning parameters of efficient trap filter |
| CN114325024B (en) * | 2021-12-29 | 2023-09-29 | 海华电子企业(中国)有限公司 | Test method for tuning parameters of efficient wave trap |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103558536A (en) | Circuit for testing overload tolerance capacity of series capacitor and working method of circuit | |
| CN105375454A (en) | Short circuit fault current limiter | |
| CN2672667Y (en) | Variable frequency type series resonance work frequency anti-pressure test device | |
| CN111555284A (en) | Cut-off frequency grading adjustable passive filter device | |
| CN110865216A (en) | Trap device for no-load test of +/-800 kV power transmission and transformation main equipment | |
| CN206211533U (en) | A kind of capacitor tuning type automatic Following-up Compensation Arc-decreasing Wires system | |
| CN201247961Y (en) | Mobile dynamic compensator for reactive harmonious wave | |
| CN106920661B (en) | A kind of electric power electric transformer | |
| CN102427232A (en) | Multiple-harmonic-source harmonic isolation device | |
| CN209200954U (en) | A kind of high-frequency and high-voltage power supply based on half-bridge copped wave amplitude modulation | |
| CN208224331U (en) | A kind of wideband resonance potential generator | |
| CN210109250U (en) | High-voltage low-pass filter | |
| CN203502551U (en) | Circuit capable of testing overloading tolerance capability of capacitors connected in series | |
| CN202975079U (en) | Load capacitor used for reactor switching impulse test | |
| CN2344908Y (en) | Resonance-proof arc-suppression coil | |
| CN202084937U (en) | MCR type SVC apparatus | |
| CN105470939A (en) | Filtering-type dynamic reactive compensation adjustment arc-extinguishing system | |
| CN204230900U (en) | A kind of iterated electrical filter | |
| CN204464997U (en) | A kind of tandem three-phase passive electric filter | |
| CN1438749A (en) | Series capacitor compensating device capable of inhibiting sub-syuchronous resonance of electric network | |
| CN109546658A (en) | A kind of distribution overvoltage inhibiting apparatus based on induction filtering | |
| CN204794084U (en) | Many level of H bridge tandem type active power filter device | |
| CN209748200U (en) | Main wiring device of 35KV two-section FC system | |
| CN203339709U (en) | Compound SVC (static var compensator) regulation device with low-voltage stepless regulation-type var compensation filtering function | |
| CN2612141Y (en) | Series capacitance compensator with high series compensatnig degree |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200306 |
|
| RJ01 | Rejection of invention patent application after publication |