CN206673583U - A kind of pre-excitation loop of energy-storage system - Google Patents
A kind of pre-excitation loop of energy-storage system Download PDFInfo
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- CN206673583U CN206673583U CN201720364022.5U CN201720364022U CN206673583U CN 206673583 U CN206673583 U CN 206673583U CN 201720364022 U CN201720364022 U CN 201720364022U CN 206673583 U CN206673583 U CN 206673583U
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- excitation
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- storage system
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Abstract
A kind of pre-excitation loop applied to energy-storage system.Including pre-excitation major loop and pre-excitation electric power loop；The pre-excitation major loop is connected in main circuit breaker (QF1) both ends between energy-storage system transformer (T) and alternating current net side in parallel；Pre-excitation contactor loop, main switch closing circuit, main switch sub-gate circuit and main switch auxiliary contact timing circuit in parallel on the pre-excitation electric power loop.The utility model is added Time Delay Opening contact in the closing circuit of pre-excitation contactor, is entered line delay to the auxiliary contact of main circuit breaker, eliminate this adverse effect so that the inexpensive breaker is used in the product by the transformation to energized circuit.
Description
Technical field：
The utility model belongs to energy-storage system field, suitable for energy accumulation current converter, to improve front end using it is specific it is low into
The reliability of the pre-excitation process of the access transformer of this switch.
Background technology：
Because energy accumulation current converter exchange end interface voltage class is different with power network, therefore become with needing to set at grid interface
Depressor carries out voltage transformation.The front end is provided with main circuit breaker with power network junction and switched as main protection.Should generally for suppression
Transformer during no-load closing excitation surge current is provided with pre-excitation loop to the adverse effect of circuit and switch in major loop.In order to
Reduce product cost and attempt main circuit breaker from a kind of relatively low single-break main circuit breaker switching device of price.Due to the breaker
Some inherent characteristics, close a floodgate moment main contact influenceed by electrodynamic repulsion force so that the moment pre-excitation that closes a floodgate is possible to disappear
Lose, cause major loop breaker closing to fail., can in order to prevent the refusal of excitation in the case where excitation fundamental circuit is constant
Can, it can only just select expensive other types breaker.Because the low price breaker is in its in addition to excitation process
His basic mechanical design feature is satisfied by the demand in product actual motion, and only because of non-principal factor, to abandon use more unfortunate.Therefore
Wish to transform by energized circuit, improve the reliability that inexpensive single-breakpoint circuit breaker coordinates with energized circuit, effectively reduce production
Product cost.
The content of the invention：
To solve above-mentioned technical problem present in prior art, the utility model discloses one kind to be applied to energy-storage system
Pre-excitation loop, the pre-excitation loop of use, by pre-excitation contactor closing circuit add delay divide contact, improve
Reliability when being switched in product using inexpensive single-breakpoint circuit breaker during combined floodgate pre-excitation.
The utility model specifically uses following technical scheme：
A kind of pre-excitation loop applied to energy-storage system, including pre-excitation major loop and pre-excitation electric power loop；It is special
Sign is：
The pre-excitation major loop is connected in the main circuit breaker between energy-storage system transformer T and alternating current net side in parallel
QF1 both ends；
Pre-excitation contactor loop in parallel, main switch closing circuit, main switch separating brake return on the pre-excitation electric power loop
Road and main switch auxiliary contact timing circuit.
The utility model further comprises following preferred scheme：
The pre-excitation major loop from left to right touch respectively by series connection miniature circuit breaker KK, pre-excitation contactor KM delay conjunction
Point, and excitation resistance (R1~R3).
The pre-excitation contactor loop be by pre-excitation contactor KM time-delay closing contact series combined floodgate contact K01,
It is connected to after pre-excitation contactor KM contactor coil between operation power, wherein combined floodgate contact K01 parallel connections pre-excitation contacts
Device KM auxiliary contact.
The main switch closing circuit is the conjunction that main circuit breaker QF1 is connected in series to by pre-excitation contactor KM delay conjunction contact
On lock loop.
The main switch sub-gate circuit is to be connected in series to by separating brake contact K02 on main circuit breaker QF1 sub-gate circuit.
The main switch auxiliary contact timing circuit is the normally-closed contact and time-delay relay KMH by main circuit breaker QF1
It is connected to after relay coil series connection between operation power.
The utility model has technique effect beneficial below：
To reduce product cost, a kind of relatively low main circuit breaker of price is selected in transformer front end, has been led in practical application
The transformation to energized circuit is crossed, Time Delay Opening contact is added in the closing circuit of pre-excitation contactor, to the auxiliary of main circuit breaker
Line delay is entered in contact, eliminates issuable pre-excitation failure during low price breaker use so that the low cost is disconnected
Road device is used in the product.
Brief description of the drawings
Fig. 1 is circuit theory diagrams-simple excitation main circuit figure of the utility model application environment；
Fig. 2 is the pre-excitation loop circuit schematic diagram that the utility model is applied to energy-storage system.
Embodiment
The technical solution of the utility model is described in further detail with reference to Figure of description.
Accompanying drawing 1 is circuit theory diagrams-simple excitation main circuit figure of the utility model application environment, and QF1 is main circuit breaker
(carrying auxiliary contact), T are main transformers, and KM is pre-excitation contactor, and R1~R3 is energized circuit resistance, and KK is energized circuit
Miniature circuit breaker.
Accompanying drawing 2 is the pre-excitation loop circuit schematic diagram applied to energy-storage system, the application disclosed in the utility model
Include pre-excitation major loop and pre-excitation electric power loop in the pre-excitation loop of energy-storage system.
Wherein, the master that the pre-excitation major loop is connected in parallel between energy-storage system transformer T and alternating current net side is broken
Road device QF1 both ends；Pre-excitation contactor loop in parallel, main switch closing circuit, main switch point on the pre-excitation electric power loop
Lock loop and main switch auxiliary contact timing circuit.
The pre-excitation major loop from left to right touch respectively by series connection miniature circuit breaker KK, pre-excitation contactor KM delay conjunction
Point, and excitation resistance (R1~R3).
The pre-excitation contactor loop is the time-delay closing contact series combined floodgate contact K01, pre- by time relay KM
It is connected to after excitation contactor KM contactor coil between operation power, wherein combined floodgate contact K01 parallel connections pre-excitation contactor
KM auxiliary contact.
The main switch closing circuit is the conjunction that main circuit breaker QF1 is connected in series to by pre-excitation contactor KM delay conjunction contact
On lock loop.The main switch sub-gate circuit is to be connected in series to by separating brake contact K02 on main circuit breaker QF1 sub-gate circuit.It is described
Main switch auxiliary contact timing circuit is the relay coil string of the normally-closed contact by main circuit breaker QF1 and time-delay relay KMH
It is connected to after connection between operation power.
When energy-storage system major loop separates with power network, as figure main circuit breaker 1QF1 is in gate-dividing state, main circuit breaker QF1 is normal
Closed contact is closure state.As Fig. 2 when loop to electricity after, close combined floodgate node K01, now time relay KM close divide in loop
Time-delay relay KMH delay point contact is also closure state, therefore pre-excitation contactor KM coils are powered and auxiliary by itself
Node is helped to carry out loop from sealed.At this moment the pre-excitation contactor KM main contacts closure in accompanying drawing 1, the conducting of pre-excitation loop, warp
Cross resistance R1~3 pair transformer T and carry out pre-excitation.After reaching delay time, in accompanying drawing 2 pre-excitation contactor KM delay close tactile
Point closure so that main circuit breaker QF1 closing circuit conducting, now main circuit breaker QF1 main contact closure makes to lead back in accompanying drawing 1
Road turns on, and transformer T is connected to power network.Now such as its normally closed auxiliary while main circuit breaker QF1 main contacts close in accompanying drawing 2
Contact, which disconnects, causes time-delay relay KMH coil blackouts, because the relay is powered off delayed-type relay, therefore reaches and sets
KMH delay point contact is opened after fixing time, and pre-excitation contactor KM is closed sub-coil loop and is disconnected.Transformer T, which closes a floodgate, to be terminated.
Claims (6)
1. a kind of pre-excitation loop applied to energy-storage system, including pre-excitation major loop and pre-excitation electric power loop；Its feature
It is：
The pre-excitation major loop is connected in the main circuit breaker between energy-storage system transformer (T) and alternating current net side in parallel
(QF1) both ends；
Pre-excitation contactor loop in parallel on the pre-excitation electric power loop, main switch closing circuit, main switch sub-gate circuit and
Main switch auxiliary contact timing circuit.
2. the pre-excitation loop according to claim 1 applied to energy-storage system, it is characterised in that：
The pre-excitation major loop from left to right touch respectively by the delay conjunction of series connection miniature circuit breaker (KK), pre-excitation contactor (KM)
Point, and excitation resistance (R1~R3).
3. the pre-excitation loop according to claim 2 applied to energy-storage system, it is characterised in that：
The pre-excitation contactor loop be by pre-excitation contactor (KM) time-delay closing contact series combined floodgate contact (K01),
It is connected to after the contactor coil of pre-excitation contactor (KM) between operation power, wherein combined floodgate contact (K01) pre-excitation in parallel
The auxiliary contact of contactor (KM).
4. the pre-excitation loop according to claim 3 applied to energy-storage system, it is characterised in that：
The main switch closing circuit is the conjunction that main circuit breaker (QF1) is connected in series to by the delay conjunction contact of pre-excitation contactor (KM)
On lock loop.
5. the pre-excitation loop according to claim 4 applied to energy-storage system, it is characterised in that：
The main switch sub-gate circuit is to be connected in series to by separating brake contact (K02) on main circuit breaker (QF1) sub-gate circuit.
6. the pre-excitation loop applied to energy-storage system according to claim 2 or 5, it is characterised in that：
The main switch auxiliary contact timing circuit is the normally-closed contact and time-delay relay (KMH) by main circuit breaker (QF1)
It is connected to after relay coil series connection between operation power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720364022.5U CN206673583U (en) | 2017-04-06 | 2017-04-06 | A kind of pre-excitation loop of energy-storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720364022.5U CN206673583U (en) | 2017-04-06 | 2017-04-06 | A kind of pre-excitation loop of energy-storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206673583U true CN206673583U (en) | 2017-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720364022.5U Active CN206673583U (en) | 2017-04-06 | 2017-04-06 | A kind of pre-excitation loop of energy-storage system |
Country Status (1)
| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054880A (en) * | 2017-12-24 | 2018-05-18 | 佛山中锦微电科技有限公司 | The pre- excitation current of automobile current generator is in road detection device and method |
| CN111756033A (en) * | 2020-06-03 | 2020-10-09 | 武汉船用机械有限责任公司 | High-voltage switch device |
-
2017
- 2017-04-06 CN CN201720364022.5U patent/CN206673583U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054880A (en) * | 2017-12-24 | 2018-05-18 | 佛山中锦微电科技有限公司 | The pre- excitation current of automobile current generator is in road detection device and method |
| CN111756033A (en) * | 2020-06-03 | 2020-10-09 | 武汉船用机械有限责任公司 | High-voltage switch device |
| CN111756033B (en) * | 2020-06-03 | 2022-08-23 | 武汉船用机械有限责任公司 | High-voltage switch device |
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