CN203180534U - Reactive power compensation device for distribution line containing 10kV high-power motor - Google Patents
Reactive power compensation device for distribution line containing 10kV high-power motor Download PDFInfo
- Publication number
- CN203180534U CN203180534U CN 201320070423 CN201320070423U CN203180534U CN 203180534 U CN203180534 U CN 203180534U CN 201320070423 CN201320070423 CN 201320070423 CN 201320070423 U CN201320070423 U CN 201320070423U CN 203180534 U CN203180534 U CN 203180534U
- Authority
- CN
- China
- Prior art keywords
- distribution line
- reactive power
- power compensation
- reactive
- motor
- 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.)
- Withdrawn - After Issue
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The utility model discloses a reactive power compensation device for a distribution line containing a 10kV high-power motor, comprising a switch and a reactive compensation capacitor (C0). The reactive power compensation device is characterized in that: the reactive compensation capacitor (C0) is electrically connected with the distribution line at a position of a line tail end (Aj) of a trunk line (A) of the distribution line through the switch, the switch is closed during a starting period of the high-power motor (M), then the reactive compensation capacitor (C0) is accessed into the distribution line, so as to reduce voltage drop of the distribution line, and the switch is open after the starting of the high-power motor (M) is completed, so as to remove the reactive compensation capacitor (C0) from the distribution line. The reactive power compensation device of the utility model overcomes the technical prejudice of a reactive local compensation principle adopted by the reactive compensation capacitor of the high-power motor in the prior art, and can significantly stabilize the voltage of the distribution line during the starting period of the high-power motor with the reactive compensation capacitor having the same capacity with the capacity in the prior art, therefore, the reactive power compensation device of the utility model has a higher economic benefit.
Description
Technical field
The utility model relates to a kind of reactive power compensator of distribution line of the 10kV of containing heavy-duty motor.
Background technology
Along with the expansion of China's industrially scalable, the application of alternating current large-power asynchronous machine is more and more general.The high-power asynchronous machine of 10kV inserts in China's distribution line, starting current reached more than 3 times of rated current when it started, consume a large amount of reactive powers, therefore often cause distribution line voltage along the line seriously to fall between the starting period at heavy-duty motor, influence the normal power supply of other load on the distribution line.
It is idle in a large number that employing consumes when heavy-duty motor inserts reactive power compensation electric capacity and starts with small electromotor between the starting period, can reduce electric motor starting to the influence of distribution circuit electric voltage, in the prior art, according to known reactive power compensation on the spot principle, reactive power compensation electric capacity inserts in the electric room at heavy-duty motor place.
But, through in a large number to the actual detected of the distribution line that contains the 10kV heavy-duty motor, can alleviate the amplitude that distribution circuit electric voltage falls to a certain extent though find the above-mentioned mode that inserts reactive power compensation electric capacity from motor electricity room, but the line end voltage of distribution line backbone is with respect to circuit sending end voltage, be that the 10kV of transformer station busbar voltage still has falling by a relatively large margin, and the distribution line node voltage between heavy-duty motor and the line end promotes difficulty, resident along the line to heavy-duty motor place distribution line, still there is considerable influence in the normal electricity consumption of enterprise, fails to satisfy the demand of reliable supply high-quality electric energy.
By analysis, it is to be located at motor electricity room because of the compensation place with reactive power compensation electric capacity that there is deficiency in above-mentioned reactive-load compensation method, though this moment, electric room current potential got a promotion, but the raising of motor terminal voltage is accompanied by the increase of starting current, this impels again, and each point voltage along the line descends on the distribution line basic routing line, particularly the node voltage that is positioned at behind the heavy-duty motor on-position of distribution line promotes difficulty, makes that inserting reactive power compensation electric capacity fails to comply with one's wishes to the stabilization of line voltage distribution.
The utility model content
The purpose of this utility model provides a kind of reactive power compensator of the distribution line that contains the 10kV heavy-duty motor of economical and efficient.
The purpose of this utility model is to realize by following technical measures:
A kind of reactive power compensator that contains the distribution line of 10kV heavy-duty motor, comprise switch and reactive power compensation electric capacity, it is characterized in that: described reactive power compensation electric capacity is electrically connected by line end position and the distribution line of described switch at the distribution line backbone, described switch is closed between the starting period at heavy-duty motor, described reactive power compensation electric capacity is inserted in the distribution line, to reduce the voltage drop of distribution line, and after the heavy-duty motor startup is finished, disconnect, described reactive power compensation electric capacity is excised from distribution line.
Compared with prior art, the utlity model has following beneficial effect:
First, the utility model is chosen the line end of distribution line backbone, be that 10kV distribution line terminal is often opened distribution line is inserted in the position, contact point as reactive power compensation electric capacity position, the reactive power compensation electric capacity of heavy-duty motor inserts in motor electricity room according to the reactive power compensation on the spot principle in the prior art, the utility model is under the prerequisite of selecting for use with the reactive power compensation electric capacity of the equal capacity of prior art, castering action to distribution circuit electric voltage during the electric motor starting significantly improves, and the distribution section voltage of distribution line between motor on-position and line end is more stable, be easy to promote.Therefore, the utility model has overcome the technology prejudice that the reactive power compensation electric capacity of heavy-duty motor adopts the reactive power compensation on the spot principle to arrange in the prior art, can improve the stabilization to distribution circuit electric voltage; And because the capacity of reactive power compensation electric capacity is bigger, the electric capacity price variance is big between each capacity, and line end voltage is being promoted under the prerequisite of equal amplitude, and the utility model reduces greatly compared to the required reactive power compensation capacitance of prior art.Therefore, the utility model also has the high advantage of economic benefit.
The second, the utility model generally is applicable to the 10kV distribution line that China is existing, and no matter whether meeting " Guangdong Power Grid planning and designing technology guide rule " power supply distance must not all can realize having the wide advantage of applicability above the distribution line of 15km.
Description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments:
Fig. 1 is the distribution line schematic diagram that contains the 10kV heavy-duty motor of the utility model embodiment one;
Fig. 2 is one of 10kV heavy-duty motor distribution line schematic diagram that adopts existing reactive-load compensation method;
Fig. 3 is the distribution line schematic diagram that contains the 10kV heavy-duty motor of the utility model embodiment two;
Fig. 4 is two of the 10kV heavy-duty motor distribution line schematic diagram that adopts existing reactive-load compensation method.
Embodiment
" Guangdong Power Grid planning and designing guide rule " requires the power supply distance of 10kV distribution line, be that the circuit sending end of its backbone is to line end, be that the 10kV of transformer station bus to 10kV distribution line terminal is often opened the distance of contact point, the area, villages and small towns should not surpass 15km, but China is limited to condition of power supply at present stage, and it is much that 10kV distribution line power supply distance surpasses this scope in the practical power systems.Illustrate respectively that below by two embodiment the utility model is applied to the execution mode that China typical case contains 10kV heavy-duty motor distribution line, and contrast with the effect that adopts existing reactive-load compensation method to produce.
Embodiment one
As shown in Figure 1, the distribution line I of a pair of 10kV of the containing heavy-duty motor of present embodiment M carries out reactive power compensation, wherein the power supply distance of distribution line I is 28km, and take the LGJ-240 lead completely, its load parameter is as shown in table 1 below, the circuit sending end of distribution line I and transformer station's 10kV bus join, voltage is 10.26kV, distribution line I is connected to 1 10kV heavy-duty motor M, the important technological parameters of this motor M is as shown in table 2, it passes through the distribution branch line of 0.47km from the 135# bar access of distribution line I backbone A, and this motor M is parallel with the idle capacitor C 1 that 450kVAR puts into operation for a long time in electric room.
The load parameter of table 1 distribution line I
Table 210kV heavy-duty motor important technological parameters
| Model | Y5601-4 |
| Capacity (kW) | 1250 |
| Rated current (A) | 8491 |
| Rated speed (r/min) | 1483 |
| Efficient | 955 |
| Power factor | 089 |
| Breakdown torque/nominal torque | 18 |
| Detent torque/nominal torque | 07 |
| Starting current/rated current | 7 |
| Motor moment of inertia (kg.m 2) | 60 |
| Maximum load rotating inertia (the kg.m that allows 2) | 650 |
| Motor weight (kg) | 6250 |
The reactive power compensator of present embodiment one comprises switch (not shown) and reactive power compensation capacitor C 0, reactive power compensation capacitor C 0 is electrically connected by line end Aj position and the distribution line I backbone A of switch at distribution line I backbone A, switch is controlled closed between the heavy-duty motor M starting period, reactive power compensation capacitor C 0 is inserted among the distribution line I, and after finishing, the motor M startup disconnects, reactive power compensation capacitor C 0 is excised from distribution line I, wherein line end is that the distribution line terminal is often opened the interconnection switch place, for the cable system distribution line, switch and reactive power compensation capacitor C 0 are installed in the electric room of line end Aj, for built on stilts net distribution line, then need often drive interconnection switch place installing stand or casing in line end Aj terminal, switch and reactive power compensation capacitor C 0 are installed on this stand or in the casing.
As shown in Figure 2, adopt existing reactive-load compensation method that the distribution line I of the above-mentioned 10kV of containing heavy-duty motor M is carried out reactive power compensation, be that switch and reactive power compensation capacitor C 0 are installed in the electric room at motor M place, reactive power compensation capacitor C 0 is electrically connected by electric room and the distribution line I backbone A of switch at the motor M place, switch is controlled closed between the heavy-duty motor M starting period, and reactive power compensation capacitor C 0 is inserted among the distribution line I; After the motor M startup is finished, disconnect, reactive power compensation capacitor C 0 is excised from distribution line I.
Adopt PSCAD/EMTDC electromagnetic transient in power system simulation software respectively the distribution line I of above-mentioned 10kV heavy-duty motor M illustrated in figures 1 and 2 and the distribution line I that do not carry out reactive power compensation to be carried out emulation, wherein distribution transforming load factor arranges by 65%, simultaneity factor arranges by 0.6, power factor arranges by 0.91, load takes to consider the model of voltage, frequency static characteristic, and when requiring to carry out reactive power compensation, the line end Aj voltage of distribution line I is not less than 8.5kV during the electric motor starting, obtains following result.
Wherein, the distribution line I simulation calculation result who does not carry out reactive power compensation is as shown in table 3 below, and as shown in Table 3, the distribution line I that does not carry out reactive power compensation is at 10kV heavy-duty motor M between the starting period, the voltage of its line end Aj is 7.7kV, descends 24.7% compared to circuit sending end voltage.
Table 3 distribution line I does not carry out reactive power compensation, the simulation calculation result during the electric motor starting
Present embodiment one is inserted the distribution line I(of reactive power compensation capacitor C 0 hereinafter to be referred as the distribution line I of Fig. 1 at line end Aj place in motor M between the starting period) and prior art in insert the distribution line I(of reactive power compensation capacitor C 0 hereinafter to be referred as the distribution line I of Fig. 2 in motor M electricity room in motor M between the starting period), the voltage that proposes their line end Aj is not less than the requirement of 8.5kV, calculate through software emulation, the distribution line I condition of meeting the requirements of shown in Figure 1 be reactive power compensation capacitor C 0 capacity more than 1130kVAR, the distribution line I condition of meeting the requirements of shown in Figure 2 is that reactive power compensation capacitor C 0 capacity is more than 2500kVAR.Be 1130kVAR and 2500kVAR with reactive power compensation capacitor C 0 capacity setting among the distribution line I illustrated in figures 1 and 2 respectively, simulation calculation result is shown in following table 4 and table 5.
Table 4 drops into 1130kVAR electric capacity, the simulation calculation result of distribution line I during electric motor starting
Table 5 drops into 2500kVAR electric capacity, the simulation calculation result of distribution line I during electric motor starting
As shown in Table 4, be under the situation of 1130kVAR in the capacity setting with reactive power compensation capacitor C 0, the line end Aj voltage of distribution line I shown in Figure 1 is 8.51kV, the line end Aj voltage of distribution line I shown in Figure 2 is 8.07kV; As shown in Table 5, be under the situation of 2500kVAR in the capacity setting with reactive power compensation capacitor C 0, the line end Aj voltage of distribution line I shown in Figure 1 is 9.66kV, the line end Aj voltage of distribution line I shown in Figure 2 is 8.55kV.
To above-mentioned data analysis as can be known, distribution line I adopts the reactive-load compensation method of present embodiment one compared to the reactive-load compensation method that adopts prior art, select for use under the prerequisite of reactive power compensation electric capacity of equal capacity, in motor M between the starting period, the voltage of its line end Aj has a distinct increment, 0 pair of circuit motor of reactive power compensation capacitor C access point is more remarkable to the voltage support effect of line end Aj, and the 10kV busbar voltage in electricity room, motor M place changes little.
Embodiment two
As shown in Figure 3, the distribution line II that two pairs of present embodiments contain 10kV heavy-duty motor M carries out reactive power compensation, wherein the power supply distance of distribution line II is 14km, take the LGJ-240 lead completely, its load parameter is as shown in table 6 below, the circuit sending end of distribution line II and transformer station's 10kV bus join, voltage is 10.26kV, distribution line II is connected to 1 10kV heavy-duty motor M, the important technological parameters of this motor M is shown in the table 2 of above-mentioned embodiment one, it passes through the distribution branch line of 0.47km from the 60# bar access of distribution line II backbone A, and this motor M is parallel with the idle capacitor C 1 that 450kVAR puts into operation for a long time in electric room.
The load parameter of table 6 distribution line II
The reactive power compensator of present embodiment two comprises switch (not shown) and reactive power compensation capacitor C 0, reactive power compensation capacitor C 0 is by the line end Aj of switch at distribution line II backbone A, be that 10kV distribution line terminal is often opened the position, contact point and distribution line II backbone A is electrically connected, switch is controlled closed between the heavy-duty motor M starting period, reactive power compensation capacitor C 0 is inserted among the distribution line II, and after the motor M startup is finished, disconnect, reactive power compensation capacitor C 0 is excised from distribution line II.
As shown in Figure 4, adopt existing reactive-load compensation method that the distribution line II of above-mentioned 10kV heavy-duty motor M is carried out reactive power compensation, be that switch (not shown) and reactive power compensation capacitor C 0 are installed in the electric room at motor M place, reactive power compensation capacitor C 0 is electrically connected by electric room and the distribution line II backbone A of switch at the motor M place, switch is controlled closed between the heavy-duty motor M starting period, reactive power compensation capacitor C 0 is inserted among the distribution line II, and after the motor M startup is finished, disconnect, reactive power compensation capacitor C 0 is excised from distribution line II.
Adopt PSCAD/EMTDC electromagnetic transient in power system simulation software respectively the distribution line II of above-mentioned Fig. 3 and 10kV heavy-duty motor M shown in Figure 4 and the distribution line II that do not carry out reactive power compensation to be carried out emulation, wherein distribution transforming load factor arranges by 65%, simultaneity factor arranges by 0.6, power factor arranges by 0.91, load takes to consider the model of voltage, frequency static characteristic, and when requiring to carry out reactive power compensation, the line end Aj voltage of distribution line II is not less than 9.0kV, obtains following result.
Wherein, the distribution line II simulation calculation result who does not carry out reactive power compensation is as shown in table 7 below, and as shown in Table 7, the distribution line II that does not carry out reactive power compensation is at 10kV heavy-duty motor M between the starting period, the voltage of its line end Aj is 8.78kV, descends 14.43% compared to circuit sending end voltage.
Table 7 distribution line II does not carry out reactive power compensation, the simulation calculation result during the electric motor starting
Present embodiment two is inserted the distribution line II(of reactive power compensation capacitor C 0 hereinafter to be referred as the distribution line II of Fig. 3 at line end Aj place in motor M between the starting period) and prior art in insert the distribution line II(of reactive power compensation capacitor C 0 hereinafter to be referred as the distribution line II of Fig. 4 in motor M electricity room in motor M between the starting period), the voltage that proposes their line end Aj is not less than the requirement of 9.0kV.Calculate through software emulation, the distribution line II condition of meeting the requirements of shown in Figure 3 be reactive power compensation capacitor C 0 capacity more than 785kVAR, the distribution line II condition of meeting the requirements of shown in Figure 4 is that reactive power compensation capacitor C 0 capacity is more than 1570kVAR.Be 785kVAR and 1570kVAR with reactive power compensation capacitor C 0 capacity setting among Fig. 3 and the distribution line II shown in Figure 4 respectively, simulation calculation result is shown in following table 8 and table 9.
Table 8 drops into 785kVAR electric capacity, the simulation calculation result of distribution line II during electric motor starting
Table 9 drops into 1570kVAR electric capacity, the simulation calculation result of distribution line II during electric motor starting
As shown in Table 8, be under the situation of 785kVAR in the capacity setting with reactive power compensation capacitor C 0, the line end Aj voltage of distribution line II shown in Figure 3 is 9.1kV, the line end Aj voltage of distribution line II shown in Figure 4 is 8.9kV; As shown in Table 9, be under the situation of 1570kVAR in the capacity setting with reactive power compensation capacitor C 0, the line end Aj voltage of distribution line II shown in Figure 3 is 9.38kV, the line end Aj voltage of distribution line II shown in Figure 4 is 9.05kV.
To above-mentioned data analysis as can be known, distribution line II adopts the reactive-load compensation method of present embodiment two compared to the reactive-load compensation method that adopts prior art, select for use under the prerequisite of reactive power compensation electric capacity of equal capacity, in motor M between the starting period, the voltage of its line end Aj has a distinct increment, 0 pair of circuit motor of reactive power compensation capacitor C access point is more remarkable to the voltage support effect of line end Aj, and the 10kV busbar voltage in electricity room, motor M place changes little.
Claims (1)
1. reactive power compensator that contains the distribution line of 10kV heavy-duty motor, comprise switch and reactive power compensation electric capacity (C0), it is characterized in that: described reactive power compensation electric capacity (C0) is electrically connected by line end (Aj) position and the distribution line of described switch at distribution line backbone (A), described switch is closed between the starting period at heavy-duty motor (M), described reactive power compensation electric capacity (C0) is inserted in the distribution line, to reduce the voltage drop of distribution line, and after heavy-duty motor (M) startup is finished, disconnect, described reactive power compensation electric capacity (C0) is excised from distribution line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320070423 CN203180534U (en) | 2013-02-06 | 2013-02-06 | Reactive power compensation device for distribution line containing 10kV high-power motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320070423 CN203180534U (en) | 2013-02-06 | 2013-02-06 | Reactive power compensation device for distribution line containing 10kV high-power motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203180534U true CN203180534U (en) | 2013-09-04 |
Family
ID=49077194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320070423 Withdrawn - After Issue CN203180534U (en) | 2013-02-06 | 2013-02-06 | Reactive power compensation device for distribution line containing 10kV high-power motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203180534U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138276A (en) * | 2013-02-06 | 2013-06-05 | 广东电网公司佛山供电局 | Reactive compensation method and device of distributing line of high-power motor containing 10 kilovolt (KV) |
-
2013
- 2013-02-06 CN CN 201320070423 patent/CN203180534U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138276A (en) * | 2013-02-06 | 2013-06-05 | 广东电网公司佛山供电局 | Reactive compensation method and device of distributing line of high-power motor containing 10 kilovolt (KV) |
| CN103138276B (en) * | 2013-02-06 | 2016-03-02 | 广东电网公司佛山供电局 | A kind of reactive-load compensation method of the distribution line containing 10kV heavy-duty motor and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103973094A (en) | Rapid precharging circuit for modular multi-level converter | |
| CN103606932A (en) | Load-related automatic control method of low-voltage dynamic reactive compensation capacitor | |
| CN103746389A (en) | Reactive compensation configuration method based on reactive voltage feature for wind power 500kV collecting transformer substation | |
| CN103475032B (en) | A kind of intelligent adapted electricity flexible control system | |
| CN104600831A (en) | Inverter auxiliary power supply system and method | |
| CN110619791A (en) | High-speed rail comprehensive energy utilization system experiment platform and experiment method thereof | |
| CN202066930U (en) | Test system for loading of frequency converter | |
| CN203180534U (en) | Reactive power compensation device for distribution line containing 10kV high-power motor | |
| CN210490481U (en) | Dynamic voltage restorer based on short-time high-frequency secondary flywheel energy storage system | |
| CN202405792U (en) | Mining high-voltage dynamic filter energy saving device | |
| CN202495699U (en) | Photovoltaic grid-connected power generation voltage-boosting intelligent box-type transformer substation | |
| CN205231583U (en) | Integration box formula integration charging station | |
| CN202455094U (en) | Full-power converter, control system and direct-drive type wind power generating set | |
| CN202616803U (en) | Hybrid current-inversion-type power generation system using wind, light and superconducting magnetic energy storage | |
| CN103138276B (en) | A kind of reactive-load compensation method of the distribution line containing 10kV heavy-duty motor and device | |
| CN204334402U (en) | Motor local compensation energy saver | |
| CN104753154A (en) | Initial charging device and method of energy storage system battery | |
| CN102545223A (en) | High-voltage dynamic filtering power-saving device for mine | |
| CN201623495U (en) | Reactive power compensation complete equipment of SVC transformer substation | |
| CN105281369A (en) | Topological structure of wind power plant, and boost control method, device and system | |
| CN203312821U (en) | Dynamic and continuous reactive power compensation device of low-voltage distribution system | |
| CN201126997Y (en) | High power rate motor | |
| CN203434631U (en) | Reactive local-compensation starting device | |
| CN202957606U (en) | Intelligent dynamic reactive power compensation device | |
| CN204304447U (en) | Voltage reactive compensation device of submerged |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130904 Effective date of abandoning: 20160302 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130904 Effective date of abandoning: 20160302 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |