CN2563729Y - Loaded voltage regulator for full thyristor non-transient transformer - Google Patents
Loaded voltage regulator for full thyristor non-transient transformer Download PDFInfo
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- CN2563729Y CN2563729Y CN 02278583 CN02278583U CN2563729Y CN 2563729 Y CN2563729 Y CN 2563729Y CN 02278583 CN02278583 CN 02278583 CN 02278583 U CN02278583 U CN 02278583U CN 2563729 Y CN2563729 Y CN 2563729Y
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- thyristor
- transformer
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Abstract
The utility model discloses an on-load voltage regulation non transient state switching device of a transformer. The utility model utilizes an on-load voltage regulation tap switch composed of full thyristors to throw thyristor switches into gear for situating tap switches in a non-arc state at the instant of switching, and the non transient state process switching can be realized by selecting the appropriate switching angle. The device is composed of a voltage transmitter, a current transmitter, a singlechip controller, a thyristor trigger circuit, a pulse transformer and a thyristor tap switch group. The utility model has advantages of strong overloading, overcurrent and overvoltage resistance power, high reliability, long service life, relative low maintenance workload and being capable of frequent voltage regulation operations, and has broad promotion and application value in electric systems.
Description
(1) technical field
The utility model belongs to electric power quality control technology field, and particularly a kind of all-thyristor does not have temporarily
The attitude transformer on-load voltage regulating device.
(2) technical background
Voltage is one of quality of power supply leading indicator, and voltage deviation influences the stable operation and the economical operation of electric power system.And voltage deviation directly endangers power consumption equipment.In the abundant electrical network of reactive power source, extensively utilize the on-load tap-changing transformer pressure regulation, to guarantee grid voltage quality.
At present, the transformer more than 90% all is equipped with on-load tap changer, and the shunting switch that uses is mechanical contact, occurs with electric arc during switching, and contact burns out easily.Because mechanical type shunting switch internal connector is loosening, the strength of materials is poor, lifts one's head loose contact even come off, and operating mechanism and limit switch are malfunctioning etc., so shunting switch in use often breaks down, reliability is low.It is reported that the fault of on-load tap changer accounts for 17.5% of transformer fault in the period of nineteen ninety to 1994, is up to more than 22%.In addition, mechanical type shunting switch governing speed is slow, can not frequent operation, and more can not follow the tracks of the variation of circuit load voltage and regulate automatically.When many on-load tap-changing transformer parallel runnings,, very easily form the inside circulation of bigger transformer because the switching of mechanical switch is difficult to synchronously.
Based on the problem that the mechanical type on-load tap changer exists, make every effort to develop a kind of novel non-arc breaking both at home and abroad and connect switch, with replacement prior mechanical on-load tap changer, thereby satisfy the power system operation requirement.
(3) summary of the invention
The purpose of this utility model is to overcome the problem of the deficiencies in the prior art and existence, and a kind of all-thyristor non-transient transformer on-load voltage regulating device that proposes, the principle of promptly utilizing current over-zero to trigger, thyristor shunting switch group is triggered or switches, thereby realize transformer on-load voltage regulating process non-transient.
The utility model all-thyristor non-transient transformer on-load voltage regulating device, its input connection bus, voltage transformer summation current transformer, its output connects transformer, the transformer connected load, described all-thyristor non-transient transformer on-load voltage regulating device is made up of voltage transmitter, current transducer, singlechip controller, thyristor gating circuit, pulse transformer, thyristor shunting switch group; Wherein:
The input of voltage transmitter connects the output of voltage transformer, the input of current transducer connects the output of current transformer, the output of voltage transmitter and current transducer is connected with the input of singlechip controller respectively, the output of singlechip controller connects the input of thyristor gating circuit, the output of thyristor gating circuit connects the input of pulse transformer, the output of pulse transformer is connected to the input of thyristor shunting switch group, the output of thyristor shunting switch group connects the input of transformer, its output connection bus.
Described thyristor gating circuit produces the current over-zero trigger impulse, and singlechip controller is made of single-chip microcomputer, also can be made of computer, and thyristor shunting switch group constitutes by thyristor.
The utlity model has following advantage and good effect:
1. the shunting switch that currently used mechanical type tap switch or mechanical contact cooperate with thyristor all exists
A series of problems, failure rate height, this device have then overcome the problem of they existence, reliability effectively
High.
2. all-thyristor tap switch is contactless, can not produce electric arc, so there is not the problem of burning contact.
3. all-thyristor tap breaker acting speed is fast, can follow the tracks of the variation of circuit load voltage and regulate automatically.Many
During the parallel running of platform on-load tap-changing transformer, good synchronously, can not form the inner circulation of bigger transformer.
4. easy and simple to handle, non-maintaining.
(4) description of drawings
Fig. 1 is an all-thyristor non-transient transformer on-load voltage regulating device theory diagram.
Among the figure 1, bus 2, voltage transformer 3, current transformer 4, all-thyristor non-transient transformer on-load voltage regulating device 4.1, voltage transmitter 4.2, current transducer 4.3, singlechip controller 4.4, thyristor gating circuit 4.5, pulse transformer 4.6, thyristor shunting switch group 5, transformer 6, load
(5) embodiment
Below in conjunction with drawings and Examples operation principle of the present utility model is described further.
As shown in Figure 1, bus 1 voltage and electric current are converted to the 100V voltage of standard and 1A (5A) electric current of standard through voltage transformer 2, current transformer 3, send into all-thyristor non-transient transformer on-load voltage regulating device 4.4 pairs of voltages of all-thyristor non-transient transformer on-load voltage regulating device are sampled, and data processing obtains actual voltage value U as calculated
X, with actual voltage value U
XWith standard voltage value U
RCompare, calculate voltage deviation (plus or minus), as thyristor shunting switch S in the thyristor shunting switch group 4.6
i(i=1,2 ... n) criterion of closure or disconnection.Corresponding closed thyristor shunting switch S
i(i=1,2 ... n) be chosen in current zero-crossing point, send trigger impulse, make its conducting; Disconnect the thyristor shunting switch of original conducting subsequently, thereby realize the load tapchanging purpose of transformer non-transient.If actual voltage value U
XWith standard voltage value U
REquate, then still keep the thyristor shunting switch conducting of original conducting.
All-thyristor non-transient transformer on-load voltage regulating device operation principle of the present utility model is as follows:
Convert voltage, the current signal that inserts voltage transformer 2 summation current transformers 3 outputs on the bus 1 to light current through voltage transmitter 4.1, current transducer 4.2 respectively and press u
x, weak current signal i
xVoltage u
x, current i
xSignal is sent to singlechip controller 4.3, is measured by singlechip controller 4.3, carries out data processing and calculates actual voltage value U
X, with U
XWith standard voltage value U
RCompare, calculate voltage deviation (plus or minus), as the thyristor shunting switch S of thyristor shunting switch group 4.6
i(i=1,2 ... n) criterion of closure or disconnection.Suppose voltage just often, the thyristor shunting switch S in the thyristor shunting switch group
1Closure, other thyristor shunting switch group S
2, S
3..., S
nAll disconnect.Work as U
X=U
RThe time, singlechip controller 4.3 sends the D in high level signal (1 level) the blockade thyristor gating circuit 4.4
2～D
n, the thyristor shunting switch S of thyristor shunting switch group 4.6
2～S
nBe not triggered and keep off-state.Thyristor shunting switch group S
1Still keep closure state, the transformer output voltage remains unchanged, and promptly load voltage is constant; If U
X≠ U
R, then singlechip controller 4.3 compares and calculates voltage deviation (plus or minus) according to survey voltage, and singlechip controller 4.3 is removed the D of respective thyristor circuits for triggering 4.4
iSend low level signal (0 level), remove D thyristor gating circuit 4.4
iBlockade; Thyristor gating circuit 4.4D
iDetect the zero crossing of electric current, produce trigger impulse, the thyristor shunting switch S in pulse transformer 4.5 triggering thyristor shunting switch groups 4.6 at current zero-crossing point
iThe control utmost point, the thyristor shunting switch S in the thyristor shunting switch group 4.6
iClosed; Simultaneously, singlechip controller 4.3 is to the D of thyristor gating circuit 4.4
1～D
I-1, D
I+1～D
nSend high level signal (1 level), block other thyristor gating circuit and do not produce trigger impulse, make other thyristor shunting switch S of thyristor shunting switch group 4.6
i～S
I-1, S
I+1～S
nDisconnect, so far finish the transformer on-load voltage regulating process one time.Owing to be zero crossing triggering thyristor shunting switch at electric current, impact so can not produce thyristor, realize the transformer on-load voltage regulating of non-transient process.
Embodiment of the present utility model: a 380V all-thyristor non-transient transformer on-load voltage regulating device.Voltage transmitter 4.1, input voltage is 100V, is output as 3.5V; Current transducer 4.2 is the Hall-type current sensor, is input as 5A, is output as 3.5V, and singlechip controller 4.3 is made up of single-chip microcomputer, analog integrated circuit and digital integrated circuit etc., and single-chip microcomputer adopts 80C320; Thyristor gating circuit 4.4 is made up of analog integrated circuit, digital integrated circuit and photoelectrical coupler etc., the trigger impulse phase shift range is about 0 °～180 °, by manual or automatic regulative mode, it is that 12V, frequency are the pulse train of 12kHz that thyristor gating circuit 4.4 produces voltage magnitude, producing voltage magnitude through pulse transformer 4.5 is that 24V, frequency are the pulse train of 12kHz, triggers thyristor shunting switch group 4.6.Pulse transformer 4.5 is made up of magnetic core and enamelled wire, and thyristor shunting switch group 4.6 is made of 12 bidirectional thyristors and corresponding protection circuit.
Claims (2)
1. all-thyristor non-transient transformer on-load voltage regulating device, the input connection bus (1) of this device, voltage transformer (2) summation current transformer (3), its output connects transformer (5), transformer (5) connected load (6) is characterized in that: described all-thyristor non-transient transformer on-load voltage regulating device (4) is made up of voltage transmitter (4.1), current transducer (4.2), singlechip controller (4.3), thyristor gating circuit (4.4), pulse transformer (4.5), thyristor shunting switch group (4.6); Wherein:
The input of voltage transmitter (4.1) connects the output of voltage transformer (2), the input of current transducer (4.2) connects the output of current transformer (3), the output of voltage transmitter (4.1) and current transducer (4.2) is connected with the input of singlechip controller (4.3) respectively, the output of singlechip controller (4.3) connects the input of thyristor gating circuit (4.4), the output of thyristor gating circuit (4.4) connects the input of pulse transformer (4.5), the output of pulse transformer (4.5) is connected to the input of thyristor shunting switch group (4.6), the output of thyristor shunting switch group (4.6) connects the input of transformer (5), its output connection bus (1).
2. all-thyristor non-transient transformer on-load voltage regulating device according to claim 1, it is characterized in that: described thyristor gating circuit (4.4) produces the current over-zero trigger impulse, singlechip controller (4.3) is made of single-chip microcomputer, also can be made of computer, thyristor shunting switch group (4.6) constitutes by thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02278583 CN2563729Y (en) | 2002-08-01 | 2002-08-01 | Loaded voltage regulator for full thyristor non-transient transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02278583 CN2563729Y (en) | 2002-08-01 | 2002-08-01 | Loaded voltage regulator for full thyristor non-transient transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2563729Y true CN2563729Y (en) | 2003-07-30 |
Family
ID=33741886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02278583 Expired - Lifetime CN2563729Y (en) | 2002-08-01 | 2002-08-01 | Loaded voltage regulator for full thyristor non-transient transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2563729Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114289704A (en) * | 2021-12-31 | 2022-04-08 | 北京钢研高纳科技股份有限公司 | Electroslag remelting ingot blank production device and production system |
-
2002
- 2002-08-01 CN CN 02278583 patent/CN2563729Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114289704A (en) * | 2021-12-31 | 2022-04-08 | 北京钢研高纳科技股份有限公司 | Electroslag remelting ingot blank production device and production system |
| CN114289704B (en) * | 2021-12-31 | 2024-01-26 | 北京钢研高纳科技股份有限公司 | Electroslag remelting ingot blank production device and production system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20081231 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |