CN202405772U - Application system of resistor in resonant earthed system - Google Patents
Application system of resistor in resonant earthed system Download PDFInfo
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- CN202405772U CN202405772U CN2011205625542U CN201120562554U CN202405772U CN 202405772 U CN202405772 U CN 202405772U CN 2011205625542 U CN2011205625542 U CN 2011205625542U CN 201120562554 U CN201120562554 U CN 201120562554U CN 202405772 U CN202405772 U CN 202405772U
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Abstract
The utility model discloses an application system of a resistor in a resonant earthed system, which comprises a neutral point and a control circuit, wherein the control circuit comprises a voltage mutual inductance circuit, a current mutual inductance circuit and a side parallel circuit in sequential parallel connection. The voltage mutual inductance circuit comprises an earthed voltage transformer, and the current mutual inductance circuit comprises a neutral point disconnecting switch, a controllable reactor, a current transformer, an automatic control parallel resistance switch and an automatic control parallel resistor, wherein the neutral point disconnecting switch, the controllable reactor and the current transformer are in sequential series connection, and the automatic control parallel resistance switch and the automatic control parallel resistor are in mutual series connection. The side parallel circuit comprises a side parallel switch and a side parallel resistor in sequential series connection, the automatic control parallel resistance switch and the automatic control parallel resistor are parallelly connected on the controllable reactor or serially connected between the controllable reactor and the current transformer, and the current transformer and the side parallel resistor are earthed. The application system of the resistor in the resonant earthed system has the advantages that accurate and real-time measurement of capacitive current is realized, damping ratio is automatically adjusted, the application system is suitable for work conditions of an electric power system in different periods to lead complete devices and power grids to reach an optimal state so that stability of the electric power system is enhanced, and the application system is widely applied to the technical field of the electric power system.
Description
Technical field
The utility model relates to technical field of power systems, particularly relates to the application system of resistance in resonant earthed system.
Background technology
Earth neutral system is exactly neutral-point solid ground or through the system of low resistance grounding, also claims big grounding current system.During a phase ground connection, another earth point except that neutral point occurs in this system, constituted short-circuit loop, the earth fault phase current is very big, in order to prevent device damage, must cut off the electricity supply rapidly, thereby power supply reliability is low, easy generation power outage.But when single phase ground fault takes place in this system,, thereby be favourable to system insulation because the clamping action of system neutral makes the voltage to earth of non-fault phase not have tangible rising.Resonant earthed system is wherein a kind of of earth neutral system, and controlled reactor is arc suppression coil in this system.
Existing capacitance current measurement technology is generally single, and two-point method, line-of-sight course, injection current method, voltage-phase method etc. are in the automatic measurement scheme of the common tradition of resonant earthed system.Current capacitance current detection scheme, according to the controlled reactor of different adjustment mode all have problems as: the capacitance current sense cycle is long, precision is not high; The number of times of transferring the files is too much, has shortened the loaded switch life-span; Need the artificial bias voltage of regulating.
Existing variant projects of location is a paraller resistanc method.It utilizes control and controlled reactor parallel resistor to carry out route selection or tripping operation etc., but it fails to give full play to the effect of secondary damping resistance, has caused the wasting of resources, has increased the loss of system simultaneously, and there is potential harm in operation to system.
Existing damping scheme is for when dispatching from the factory, in primary side or secondary side serial or parallel connection one fixed resistance value.This fixed resistance value possibly need artificial adjustment resistance value when system capacitive current changes, make troubles to operation.
The utility model content
For addressing the above problem, the utility model provide a kind of stable, fast, accurately, the application system of resistance in resonant earthed system flexibly.
The utility model solves the technical scheme that its technical problem adopted:
The application system of resistance in resonant earthed system; Comprise neutral point and control circuit; Said control circuit is connected on the neutral point, and said control circuit comprises mutual induction of voltage circuit, electric current mutual inductance circuit and the side parallel circuits of parallel connection successively, and said mutual induction of voltage circuit comprises the voltage transformer of a ground connection; Said electric current mutual inductance circuit comprises neutral point isolating switch, controlled reactor, the current transformer of series connection successively; Automatic control parallel resistance switch that also comprises mutual series connection and control parallel resistance automatically, said automatic control parallel resistance switch and control automatically parallel resistance be connected in parallel on the controlled reactor or be connected on controlled reactor and current transformer between, said current transformer ground connection; Said side parallel circuits comprises the side paralleling switch and the side parallel resistance of series connection successively, side parallel resistance ground connection.
Further, said controlled reactor is wherein a kind of of traditional mechanical formula controlled reactor, magnet controlled reactor, thyristor-controlled reactor, PWM control reactor or superconductive controllable reactor.
Further, said automatic control parallel resistance switch is at least one group of switch that is cascaded and resistance with controlling parallel resistance automatically.
The beneficial effect of the utility model: the application system of the utility model resistance in resonant earthed system comprises neutral point and control circuit; Said control circuit comprises mutual induction of voltage circuit, electric current mutual inductance circuit and the side parallel circuits of parallel connection successively; The utility model can be measured the capacitance current of electric power system quickly and accurately; And can significantly reduce the frequency of utilization of the main vulnerable equipment of part in the complete sets of equipment, thereby prolong the life-span of equipment; Can self-adaptive electric power system's different phase to the requirement of ratio of damping, reduces in servicely, need the artificial drawback of adjusting; Resistance through being parallel to controlled reactor or route selection result detect the excision that earth fault line and kinds of schemes are grounded faulty line.
Description of drawings
Be described further below in conjunction with the embodiment of accompanying drawing the utility model:
Fig. 1 is the application system parallel connection scheme modular structure figure of the utility model resistance in resonant earthed system;
Fig. 2 is the application system parallel connection scheme electrical block diagram of the utility model resistance in resonant earthed system;
Fig. 3 is the application system tandem plan modular structure figure of the utility model resistance in resonant earthed system;
Fig. 4 is the application system tandem plan electrical block diagram of the utility model resistance in resonant earthed system.
Among the figure: neutral point 1, voltage transformer 11, side paralleling switch 12, side parallel resistance 13, neutral point isolating switch 14, controlled reactor 15, current transformer 16, automatically control parallel resistance switch 17, control parallel resistance 18, channel selector 19 automatically.
Embodiment
With reference to Fig. 1, Fig. 2; The application system of resistance in resonant earthed system; Comprise neutral point 1 and control circuit; Said control circuit is connected on the neutral point 1, and said control circuit comprises mutual induction of voltage circuit, electric current mutual inductance circuit and the side parallel circuits of parallel connection successively, and said mutual induction of voltage circuit comprises the voltage transformer 11 of a ground connection; Said electric current mutual inductance circuit comprises neutral point isolating switch 14, controlled reactor 15, the current transformer 16 of series connection successively; Also comprise the automatic control parallel resistance switch 17 of mutual series connection and control parallel resistance 18 automatically, said automatic control parallel resistance switch 17 and control automatically parallel resistance 18 be connected in parallel on the controlled reactor 15 or be connected on controlled reactor 15 and current transformer 16 between, said current transformer 16 ground connection; Said side parallel circuits comprises the side paralleling switch 12 and side parallel resistance 13 of series connection successively, side parallel resistance 13 ground connection.
With reference to Fig. 3; The application system of resistance in resonant earthed system comprises neutral point 1 and control circuit, and said control circuit is connected on the neutral point 1; Said control circuit comprises mutual induction of voltage circuit, electric current mutual inductance circuit and the side parallel circuits of parallel connection successively; Said mutual induction of voltage circuit comprises the voltage transformer 11 of a ground connection, and said electric current mutual inductance circuit comprises neutral point isolating switch 14, controlled reactor 15, the current transformer 16 of series connection successively, also comprises the automatic control parallel resistance switch 17 of mutual series connection and controls parallel resistance 18 automatically; Said automatic control parallel resistance switch 17 is connected in parallel on the controlled reactor 15 with automatic control parallel resistance 18; Said current transformer 16 ground connection, said side parallel circuits comprise the side paralleling switch 12 and side parallel resistance 13 of series connection successively, side parallel resistance 13 ground connection.
Further as preferred embodiment, said controlled reactor 15 be that traditional mechanical formula controlled reactor, magnet controlled reactor, thyristor-controlled reactor, PWM are controlled wherein a kind of of reactor or superconductive controllable reactor.
Further as preferred embodiment, said automatic control parallel resistance switch 17 is at least one group of switch that is cascaded and resistance with controlling parallel resistance 18 automatically.
Further as preferred embodiment, control the opening of said automatic control parallel resistance switch 17, electric capacity and electric current that closure can be measured electric power system.
Further as preferred embodiment, control the opening of said automatic control parallel resistance switch 17, closure can make the complete sets of equipment adapt to the variation of electric power system automatically, makes ratio of damping remain on optimum state.
Further as preferred embodiment, controlling the opening of said automatic control parallel resistance switch 17, closure can be when electric power system generation earth fault, through the active power method carry out fast, repeatedly route selection.
Further as preferred embodiment, control the opening of said side paralleling switch 12, closure can when electric power system generation earth fault, realize active power method route selection or tripping operation under different setting resistance values.
With reference to Fig. 4; The application system of resistance in resonant earthed system; Comprise neutral point 1 and control circuit; Said control circuit is connected on the neutral point 1, and said control circuit comprises mutual induction of voltage circuit, electric current mutual inductance circuit and the side parallel circuits of parallel connection successively, and said mutual induction of voltage circuit comprises the voltage transformer 11 of a ground connection; Said electric current mutual inductance circuit comprises neutral point isolating switch 14, controlled reactor 15, the current transformer 16 of series connection successively; Also comprise the automatic control parallel resistance switch 17 of mutual series connection and control parallel resistance 18 automatically, said automatic control parallel resistance switch 17 and control parallel resistance 18 automatically and be connected between controlled reactor 15 and the current transformer 16 said current transformer 16 ground connection; Said side parallel circuits comprises the side paralleling switch 12 and side parallel resistance 13 of series connection successively, side parallel resistance 13 ground connection.
Further as preferred embodiment, parallelly connected with automatic control parallel resistance switch 17 and control parallel resistance automatically 18 channel selector 19, channel selector 19 is opened, and does not insert resistance; Switch breaks off, and is inserted the size of resistance by automatic control parallel resistance switch 17 decisions.
Certainly; The utility model is not limited to above-mentioned execution mode; Those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite of the utility model spirit, modification that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (3)
1. the application system of resistance in resonant earthed system; Comprise neutral point (1) and control circuit; Said control circuit is connected on the neutral point (1); It is characterized in that: said control circuit comprises mutual induction of voltage circuit, electric current mutual inductance circuit and the side parallel circuits of parallel connection successively; Said mutual induction of voltage circuit comprises the voltage transformer (11) of a ground connection; Said electric current mutual inductance circuit comprises neutral point isolating switch (14), controlled reactor (15), the current transformer (16) of series connection successively; Also comprise the automatic control parallel resistance switch (17) of mutual series connection and automatic control parallel resistance (18), said automatic control parallel resistance switch (17) and control parallel resistance (18) automatically are connected in parallel on controlled reactor (15) upward or be connected between controlled reactor (15) and the current transformer (16) said current transformer (16) ground connection; Said side parallel circuits comprises the side paralleling switch (12) and the side parallel resistance (13) of series connection successively, side parallel resistance (13) ground connection.
2. the application system of resistance according to claim 1 in resonant earthed system is characterized in that: said controlled reactor (15) is wherein a kind of of traditional mechanical formula controlled reactor, magnet controlled reactor, thyristor-controlled reactor, PWM control reactor or superconductive controllable reactor.
3. the application system of resistance according to claim 1 in resonant earthed system is characterized in that: said automatic control parallel resistance switch (17) and automatic control parallel resistance (18) are at least one group of switch that is cascaded and resistance.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104503951A CN102570420A (en) | 2011-12-29 | 2011-12-29 | System for application of resistor to resonant grounding system |
| CN2011205625542U CN202405772U (en) | 2011-12-29 | 2011-12-29 | Application system of resistor in resonant earthed system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104503951A CN102570420A (en) | 2011-12-29 | 2011-12-29 | System for application of resistor to resonant grounding system |
| CN2011205625542U CN202405772U (en) | 2011-12-29 | 2011-12-29 | Application system of resistor in resonant earthed system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202405772U true CN202405772U (en) | 2012-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205625542U Expired - Fee Related CN202405772U (en) | 2011-12-29 | 2011-12-29 | Application system of resistor in resonant earthed system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202405772U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570420A (en) * | 2011-12-29 | 2012-07-11 | 广东中钰科技有限公司 | System for application of resistor to resonant grounding system |
-
2011
- 2011-12-29 CN CN2011205625542U patent/CN202405772U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570420A (en) * | 2011-12-29 | 2012-07-11 | 广东中钰科技有限公司 | System for application of resistor to resonant grounding system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGDONG ZHONGYU TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ZHONGYU SCIENCE + TECHNOLOGY CO., LTD., GUANGDONG |
|
| CP03 | Change of name, title or address |
Address after: 511495 Guangdong city of Guangzhou province Panyu District zhongcunzhen Pingshan Village (office building No. 2) Patentee after: GUANGDONG ZHONGYU TECHNOLOGY CO., LTD. Address before: A street in Guangdong city of Guangzhou province Panyu District 511495 cliff Street Xinghong Patentee before: Zhongyu Science & Technology Co., Ltd., Guangdong |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20171229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |