CN111628573A - Online measurement structure for reactive capacitance compensation - Google Patents
Online measurement structure for reactive capacitance compensation Download PDFInfo
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- CN111628573A CN111628573A CN202010458850.1A CN202010458850A CN111628573A CN 111628573 A CN111628573 A CN 111628573A CN 202010458850 A CN202010458850 A CN 202010458850A CN 111628573 A CN111628573 A CN 111628573A
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- 238000005259 measurement Methods 0.000 title claims abstract description 30
- 239000003990 capacitor Substances 0.000 claims abstract description 53
- 238000001514 detection method Methods 0.000 claims 1
- KYIKRXIYLAGAKQ-UHFFFAOYSA-N abcn Chemical compound C1CCCCC1(C#N)N=NC1(C#N)CCCCC1 KYIKRXIYLAGAKQ-UHFFFAOYSA-N 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides an online measurement structure for reactive capacitance compensation, which comprises: the system comprises a plurality of compensation capacitors to be detected, a plurality of current detectors and a plurality of voltage detectors, wherein the plurality of compensation capacitors to be detected are connected with a power grid through a main switch; or the compensation capacitors to be detected are respectively connected with a power grid through first switches; the current detector is arranged on a circuit between the compensation capacitor to be detected and the main switch or the first switch, and the voltage detector is connected with the compensation capacitor to be detected. The online measurement of each path of reactive compensation capacitor is realized, so that the energy efficiency and the quality of the power grid are improved.
Description
Technical Field
The invention relates to the field of power grids and power distribution, in particular to an online measurement structure for reactive capacitance compensation.
Background
Consumers of an electrical power system generate reactive power when in use and are often inductive, which reduces the efficiency of the capacity usage of the power supply and can be improved by adding appropriate capacitance to the system. Reactive power based on an alternating current power grid requires capacitance compensation to adjust a power factor to improve the operating efficiency and the electric energy quality of the power grid. And the current reactive capacitance compensation lacks a discrimination means for whether each compensation capacitor is normally operated. It is obviously far from sufficient to judge the appearance of the capacitor by external phenomena such as swelling, leakage, heat generation, etc.
A large amount of reactive capacitance compensation has long been operating abnormally, similarly to a dummy, thus resulting in a penalty for the grid company for insufficient power factor. On the one hand, the economic benefits of the users are impaired, and on the other hand, the quality of the power supply and the operating efficiency of the power grid are also affected.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an online measurement structure for reactive capacitance compensation.
According to the invention, the on-line measurement structure for reactive capacitance compensation comprises: a plurality of compensation capacitors to be measured, a plurality of current detectors and a plurality of voltage detectors,
the compensation capacitors to be detected are connected with a power grid through a main switch; alternatively, the first and second electrodes may be,
the compensation capacitors to be detected are respectively connected with a power grid through a first switch;
the current detector is arranged on a circuit between the compensation capacitor to be detected and the main switch or the first switch, and the voltage detector is connected with the compensation capacitor to be detected.
Preferably, the compensation capacitor to be measured is connected with the main switch through a reactor, a second switch and a fuse which are connected in series.
Preferably, the second switch includes: a combination switch, a thyristor switch or an ac contactor.
Preferably, the compensation capacitor to be measured is connected with the first switch through a reactor, a second switch and a fuse which are connected in series.
Preferably, the master switch includes: and a fuse switch.
Preferably, the first switch is composed of a fixed contact and a movable contact.
Preferably, the compensation capacitor to be measured includes: three-phase capacitance or single-phase capacitance.
Preferably, the current detector includes: a current sensor and a current display device;
the current sensor is arranged between the compensation capacitor to be detected and the main switch or the first switch, and the current display device is electrically connected with the current sensor.
Compared with the prior art, the invention has the following beneficial effects:
the online measurement of each path of reactive compensation capacitor is realized, and the running state, grid-connected energy output and the failure or attenuation of the capacitor of each compensation capacitor are mastered in real time, so that the energy efficiency and the quality of a power grid are improved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic circuit diagram according to embodiment 1 of the present invention;
fig. 2 is a schematic circuit structure diagram according to embodiment 2 of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
The bus grid-connected reactive capacitance compensation online measurement structure is shown in fig. 1.
The bus grid-connected reactive capacitance compensation online measurement structure is composed of a grid-connected main switch 101 and a reactive capacitance compensation online measurement structure 102. The N reactive capacitance compensation online measurement structures 102 are superposed and combined to transmit electric energy stored in a capacitor to a power grid ABCN through a grid-connected main switch 101.
The reactive capacitance compensation online measurement structure 102 is composed of a fuse 103, a second switch 104, a current sensor 105, a reactor 106, a three-phase capacitor 107 (or a single-phase capacitor), a current display device 108 and a voltage display device 109.
A current sensor 105 and a current display device 108 are arranged between a second switch 104 and a three-phase capacitor 107 (or a single-phase capacitor) of a main loop of the reactive capacitance compensation online measurement structure 102, and compensation current of the compensation capacitor 107 is measured online to judge parameters such as transmission of stored electric energy to a power grid ABCN by the compensation capacitor 107 and attenuation failure. Meanwhile, a voltage display device 109 is arranged at a port of the compensation capacitor 107, and the voltage of the port of the compensation capacitor 107 is measured on line to judge the switching operation state of the compensation capacitor 107. The operation condition of the compensation capacitor 107 is grasped in real time through online measurement of the current and voltage of the reactive compensation capacitor 107.
Example 2
Fig. 2 shows an extraction-type tap-grid reactive capacitance compensation online measurement system.
The extraction type branching and grid-connection reactive capacitance compensation online measurement structure 200 is composed of a first switch (a fixed contact 201 and a movable contact 202), a fuse 203, a second switch 204, a current sensor 205, a reactor 206, a three-phase capacitor or a single-phase capacitor 207, a current display device 208 and a voltage display device 209.
The N extraction-type branching grid-connected reactive capacitance compensation online measurement structures 200 directly transmit the electric energy stored in the capacitance to the power grid ABCN. The fixed contact 201 of the first switch of the main loop of the extraction type branching grid-connected reactive capacitance compensation online measurement structure 200 is connected with the power grid ABCN, and the movable contact 202 of the first switch is connected with the fuse 203. The insertion or extraction of the moving contact 202 relative to the fixed contact 201 acts as the grid-connected access or exit of the extraction type reactive capacitance compensation online measurement system 200. A current sensor 205 and a current display device 208 are arranged between the second switch 204 and the three-phase capacitor 207 (or single-phase capacitor) of the extraction type branching and grid-connection reactive capacitance compensation online measurement system 200, and the compensation current of the compensation capacitor 207 is measured online so as to judge parameters such as the transmission of the stored electric energy to the power grid ABCN by the compensation capacitor 207, attenuation failure and the like. Meanwhile, a voltage measuring device 209 is arranged at a port of the compensation capacitor 207, and the voltage at the port of the compensation capacitor 207 is measured on line to judge the switching operation condition of the compensation capacitor 207. The operation condition of the compensation capacitor 207 is grasped in real time through online measurement of the current and voltage of the reactive compensation capacitor 207.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (9)
1. An on-line measurement structure for reactive capacitance compensation, comprising: a plurality of compensation capacitors to be measured, a plurality of current detectors and a plurality of voltage detectors,
the compensation capacitors to be detected are connected with a power grid through a main switch; alternatively, the first and second electrodes may be,
the compensation capacitors to be detected are respectively connected with a power grid through a first switch;
the current detector is arranged on a circuit between the compensation capacitor to be detected and the main switch or the first switch, and the voltage detector is connected with the compensation capacitor to be detected.
2. The on-line measurement structure of reactive capacitance compensation according to claim 1, wherein the compensation capacitor to be measured is connected to the main switch through a reactor, a second switch and a fuse connected in series.
3. The on-line measurement arrangement for reactive capacitance compensation according to claim 2, characterized in that the second switch comprises: a combination switch, a thyristor switch or an ac contactor.
4. The on-line measurement structure for reactive capacitance compensation according to claim 1, wherein the compensation capacitor to be measured is connected to the first switch through a reactor, a second switch and a fuse connected in series.
5. The on-line measurement structure for reactive capacitance compensation according to claim 1, wherein the main switch comprises: and a fuse switch.
6. The reactive capacitance compensation on-line measuring structure according to claim 1, wherein the first switch is composed of a fixed contact and a movable contact.
7. The on-line measurement structure for reactive capacitance compensation according to claim 1, wherein the compensation capacitor to be measured comprises: three-phase capacitance or single-phase capacitance.
8. The on-line measurement structure for reactive capacitance compensation according to claim 1, wherein the current detector comprises: a current sensor and a current display device;
the current sensor is arranged between the compensation capacitor to be detected and the main switch or the first switch, and the current display device is electrically connected with the current sensor.
9. The on-line measurement structure for reactive capacitance compensation according to claim 1, wherein the voltage detection device is connected to a compensation capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010458850.1A CN111628573A (en) | 2020-05-20 | 2020-05-20 | Online measurement structure for reactive capacitance compensation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010458850.1A CN111628573A (en) | 2020-05-20 | 2020-05-20 | Online measurement structure for reactive capacitance compensation |
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| CN111628573A true CN111628573A (en) | 2020-09-04 |
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| CN202010458850.1A Pending CN111628573A (en) | 2020-05-20 | 2020-05-20 | Online measurement structure for reactive capacitance compensation |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414200A (en) * | 2013-08-16 | 2013-11-27 | 四川九成信息技术有限公司 | Method for monitoring and controlling automatic reactive power compensation system of high-low voltage power distribution network |
| CN203722242U (en) * | 2014-02-11 | 2014-07-16 | 上海上电电容器有限公司 | High-voltage parallel capacitor device |
| CN106896287A (en) * | 2017-04-13 | 2017-06-27 | 山东汇能电气有限公司 | The on-line monitoring method of power capacitor working condition in reactive power compensator |
| CN207082849U (en) * | 2017-08-15 | 2018-03-09 | 宁夏大有电气集团有限公司 | Reactive compensation cabinet |
| CN109066714A (en) * | 2018-08-24 | 2018-12-21 | 常州博瑞电力自动化设备有限公司 | A kind of box distribution series compensation device and its working method |
| CN109406883A (en) * | 2018-12-27 | 2019-03-01 | 日新电机（无锡）有限公司 | A kind of Assembled high-voltage shunted capacitor device and power equipment |
| CN213341748U (en) * | 2020-05-20 | 2021-06-01 | 上海华声电气研究所 | Online measurement structure for reactive capacitance compensation |
-
2020
- 2020-05-20 CN CN202010458850.1A patent/CN111628573A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414200A (en) * | 2013-08-16 | 2013-11-27 | 四川九成信息技术有限公司 | Method for monitoring and controlling automatic reactive power compensation system of high-low voltage power distribution network |
| CN203722242U (en) * | 2014-02-11 | 2014-07-16 | 上海上电电容器有限公司 | High-voltage parallel capacitor device |
| CN106896287A (en) * | 2017-04-13 | 2017-06-27 | 山东汇能电气有限公司 | The on-line monitoring method of power capacitor working condition in reactive power compensator |
| CN207082849U (en) * | 2017-08-15 | 2018-03-09 | 宁夏大有电气集团有限公司 | Reactive compensation cabinet |
| CN109066714A (en) * | 2018-08-24 | 2018-12-21 | 常州博瑞电力自动化设备有限公司 | A kind of box distribution series compensation device and its working method |
| CN109406883A (en) * | 2018-12-27 | 2019-03-01 | 日新电机（无锡）有限公司 | A kind of Assembled high-voltage shunted capacitor device and power equipment |
| CN213341748U (en) * | 2020-05-20 | 2021-06-01 | 上海华声电气研究所 | Online measurement structure for reactive capacitance compensation |
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