CN111431447B - Generator output voltage wiring device and control protection method thereof - Google Patents

Abstract

The invention relates to the technical field of generators, in particular to a generator output voltage wiring device and a control protection method thereof. The wiring device comprises three circuit breakers with built-in electric switching-on and switching-off mechanisms, a plurality of relays, a generator set controller and a total output circuit breaker. The generator set controller controls the electric switching-on and switching-off mechanisms inside the three circuit breakers by outputting control signals, and achieves automatic coordination and unified control of switching-on and switching-off of the three circuit breakers by means of an electric interlocking control relay, so that the internal windings of the generator set can be automatically switched between a parallel star type and a series star type to realize different voltage outputs. The invention can fully and automatically realize the automatic switching between the parallel star type and the serial star type of the output voltage of the generator, and safely and comprehensively avoid the accidents and the potential safety hazards of the generator, such as burning down and the like.

Description

Generator output voltage wiring device and control protection method thereof

Technical Field

The invention relates to the technical field of generators, in particular to a generator output voltage wiring device and a control protection method thereof.

Background

The diesel generator set is used as a standby power generation source and a main power generation source, and is extremely widely applied in the international society at present. In the international engineering machine and electric power equipment leasing market, especially in the field of industrial electricity, since industrial equipment electricity requires power sources of different voltages (for example, three phases 230V and 460V in the philippines country, three phases 220V and 440V-480V in the americans country and region), it is often necessary to modify the output voltage of the generator in order to be able to provide the equipment with a power source of a suitable stable voltage.

In order to change the output voltage of a generator, in the early stage of the generator unit industry, a mode of opening a generator junction box and manually changing a generator winding wiring method is adopted to change star-shaped parallel connection into switching serial star-shaped wiring. However, because the generator junction box has limited space and requires a professional to manually change the junction mode, the requirements of simple and quick operation of general users cannot be met. The later stage upgrade adopts a mode of changing a connection mode by a change-over switch and a contactor switch instead of manual, and the output voltage of the generator is automatically switched, but because the change-over switch, the contactor and other switches do not have the functions of overload current and short-circuit protection of the generator winding load and overvoltage protection, and meanwhile, the types of switches are easy to burn or block a switch knife edge due to the electric arc generated during the long-term use and the frequent switching, so that accidents and potential safety hazards such as the burning of the internal winding of the generator occur, and no effective solution and control protection method exist in the market at present.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a generator output voltage wiring device and a control protection method thereof. The device can fully and automatically realize automatic switching between parallel star type and serial star type of the output voltage of the generator, and safely and comprehensively avoid accidents such as burning of the generator and potential safety hazards.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the generator output voltage wiring device comprises a circuit breaker MCCB1, a circuit breaker MCCB2, a circuit breaker MCCB3, a relay KM2, a relay KM4, a relay QF1, a relay QF2, a relay QF3, a generator set controller and a generator set load output circuit breaker MCCB; the circuit breaker MCCB1, the circuit breaker MCCB2 and the circuit breaker MCCB3 are respectively internally provided with an electric execution switching-on and switching-off mechanism M-and a circuit breaker switching-on coil YC and a circuit breaker switching-off coil YO, and simultaneously are correspondingly internally provided with a relay QF1, a relay QF2, a relay QF3, a switching-on feedback signal auxiliary contact Q/1, a switching-on feedback signal auxiliary contact Q/2 and a switching-on feedback signal auxiliary contact Q/3 respectively; the circuit breaker MCCB1, the circuit breaker MCCB2 and the circuit breaker MCCB3 can respectively correspond to feedback auxiliary contact closing signals of the circuit breaker;

the generator winding T10, the generator winding T11 and the generator winding T12 are short-circuited and connected to a first phase, a second phase and a third phase of an outlet end of the circuit breaker MCCB2, and finally led out to an output neutral point of the generator N; the generator winding T4 is simultaneously connected to a first phase of the inlet of the circuit breaker MCCB2 and the inlet of the circuit breaker MCCB3, the generator winding T5 is simultaneously connected to a second phase of the inlet of the circuit breaker MCCB2 and the inlet of the circuit breaker MCCB3, and the generator winding T6 is simultaneously connected to a third phase of the inlet of the circuit breaker MCCB2 and the inlet of the circuit breaker MCCB 3;

the generator winding T7 is simultaneously connected to a first phase of the outlet terminal of the circuit breaker MCCB3 and the inlet terminal of the circuit breaker MCCB1, the generator winding T8 is simultaneously connected to a second phase of the outlet terminal of the circuit breaker MCCB3 and the inlet terminal of the circuit breaker MCCB1, and the generator winding T9 is simultaneously connected to a third phase of the outlet terminal of the circuit breaker MCCB3 and the inlet terminal of the circuit breaker MCCB 1;

the generator winding T1 is simultaneously connected to a first phase of the outlet terminal of the circuit breaker MCCB1 and the inlet terminal of the generator set load output circuit breaker MCCB, the generator winding T2 is simultaneously connected to a second phase of the outlet terminal of the circuit breaker MCCB1 and the inlet terminal of the generator set load output circuit breaker MCCB, and the generator winding T3 is simultaneously connected to a third phase of the outlet terminal of the circuit breaker MCCB1 and the inlet terminal of the generator set load output circuit breaker MCCB;

the power generating set controller is provided with a PLC control function, and is used for controlling the electric executing switching-on and switching-off mechanisms M to M of the circuit breaker MCCB1, the circuit breaker MCCB2 and the circuit breaker MCCB3 by outputting control signals to the relay KM2 or not, and coordinating and uniformly controlling the switching-on and switching-off of the electric executing switching-on and switching-off mechanisms M to M of the circuit breaker MCCB1, the circuit breaker MCCB2 and the circuit breaker MCCB3 by means of electric interlocking control relay KM2, so that the internal winding of the power generating set is automatically switched from a parallel star type to a serial star type.

Further, the generator set controller monitors states of the breaker MCCB1, the breaker MCCB2 and the corresponding closing feedback signal auxiliary contacts of the breaker MCCB3 through an interlocking signal device consisting of a relay QF1, a relay QF2 and a relay QF 3; when the breaker MCCB1, the breaker MCCB2 and/or the breaker MCCB3 are/is in the error of the on-off position, the generator set controller immediately outputs a protection signal to the relay KM4 to realize the forced off of the breaker MCCB1, the breaker MCCB2 and the breaker MCCB3, protect the internal winding of the generator and output an alarm and stop running the generator set.

Further, when the switching-on/off position error is that the breaker MCCB3 is switched on, the breaker MCCB1 or the breaker MCCB2 is switched on.

Further, the relay KM2 and the relay KM4 are both DC24V relays; the relay QF1, the relay QF2 and the relay QF3 are all DC24V relays; the circuit breaker MCCB1, the circuit breaker MCCB2 and the circuit breaker MCCB3 are all molded case circuit breakers; the genset controller is a DSE7320 controller.

The invention also provides a control protection method of the generator output voltage wiring device, which comprises the following steps:

s1: in the operation and use process, the generator set controller judges whether to output a molded case circuit breaker MCCB1, a molded case circuit breaker MCCB2 and/or a molded case circuit breaker MCCB3 on-off control signal through the built-in alternative protection parameters and the PLC operation protection parameters;

s2: when a default operation mode parallel star-type generator is executed to output AC230V voltage, the generator set controller outputs no positive signal to the relay KM2, so that control signals are respectively sent to closing coils YC of the plastic case circuit breaker MCCB1 and the plastic case circuit breaker MCCB2 through the relay KM2, and the plastic case circuit breaker MCCB1 and the plastic case circuit breaker MCCB2 are positioned at closing positions; simultaneously, a control signal is sent to a breaking coil YO of the molded case circuit breaker MCCB3 through a relay KM2, so that the MCCB3 is positioned at a breaking position; therefore, a star-shaped parallel connection mode of the internal windings of the generator is realized, and low-voltage AC230V output is realized; meanwhile, whether the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3 are at the correct on-off positions or not is detected through the electric interlocking combination of the closing feedback signal auxiliary contact Q/1, the closing feedback signal auxiliary contact Q/2 and the closing feedback signal auxiliary contact Q/3 of the molded case circuit breaker MCCB1, the molded case circuit breaker QF2 and the molded case circuit breaker QF3, so that the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3 can correctly execute the switching instruction of the generator set controller is ensured; the generator set controller automatically operates and controls the generator set through built-in low-voltage operation protection parameters, once the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3 have wrong switching-on and switching-off positions, the generator set controller receives feedback signals of relay QF1, relay QF2 and/or relay QF3 combined by the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3, and sends forced breaking signals to the relay KM4, and the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3 are forced to break through controlling the switching-off coils YO of the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3, so that shutdown protection of the generator set is protected, and the generator set is controlled, and fault reasons are checked by workers;

when the alternative parameter operation serial star-type generator outputs AC460V voltage, a control switch SW2 is switched on manually, a signal is input to a No. 52 input terminal of a generator set controller, and a No. 8 output terminal positive signal of the generator set controller is output to a relay KM2, so that a control signal is respectively sent to a molded case circuit breaker MCCB1 and a breaking coil YO of the molded case circuit breaker MCCB2 through the relay KM2, and the molded case circuit breaker MCCB1 and the molded case circuit breaker MCCB2 are positioned at a breaking position; meanwhile, a control signal is sent to a closing coil YC of the molded case circuit breaker MCCB3 through a relay KM2, so that the molded case circuit breaker MCCB3 is positioned at a closing position; therefore, a series star connection mode of the internal windings of the generator is realized, and high-voltage AC460V output is realized; meanwhile, whether the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3 are at the correct switching-on and switching-off positions or not is detected through the electric interlocking combination of the switching-on feedback signal auxiliary contact Q/1, the switching-on feedback signal auxiliary contact Q/2 and the switching-on feedback signal auxiliary contact Q/3 of the molded case circuit breaker MCCB1, the molded case circuit breaker QF2 and/or the molded case circuit breaker MCCB3, so that the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3 can accurately execute the switching instruction of the generator set controller is ensured; the generator set controller automatically operates and controls the generator set through built-in high-voltage AC460V operation protection parameters, once the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3 have wrong switching-on and switching-off positions, the generator set controller receives feedback signals of relay QF1, relay QF2 and/or relay QF3 combined by the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3 switching-on signals and sends forced breaking signals to the relay KM4, and through controlling the switching-off coils YO of the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3, forced breaking of the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3 is realized, so that the internal windings of the generator are protected and the generator set is controlled to stop and the fault causes are checked by workers.

Further, the incorrect on-off position is triggered by overload and/or human misoperation.

Advantageous effects

Compared with the prior art, the invention has the following beneficial effects:

1. the invention provides a generator output voltage wiring device and a control protection method thereof, which fully automatically realize automatic switching between parallel star and serial star of the generator output voltage, so that the output voltage of a generator set can meet the requirements of electric equipment in different countries and regions, and accidents and potential safety hazards such as internal winding burnout of the generator caused by manual misoperation of non-professional staff are avoided.

2. Because the circuit breaker combination, the control mode of the on-off electric linkage and the auxiliary contact on-off signal feedback are adopted, the generator controller can monitor the wiring state of the internal winding of the generator in real time, and accidents and potential safety hazards such as generator burnout and the like are avoided more safely and comprehensively.

3. Because the arc-extinguishing chamber of the switching-on and switching-off of the breaker combination is adopted, other automatic change-over switches or contactor devices are avoided, and because the switch is used for a long time and is used for generating an arc (without an arc-extinguishing device) during frequent switching, the switch knife edge is easy to burn or block, so that accidents such as burning of the internal winding of the generator and potential safety hazards occur.

4. The invention can effectively protect the generator set and avoid accidents and potential safety hazards such as burning of the internal windings of the generator caused by overvoltage, overload and short-circuit faults and the like of the generator due to the adoption of overvoltage/undervoltage protection, overload and short-circuit protection of the breaker combination.

Drawings

FIG. 1 is a wiring device of the present invention when operating a generator output voltage parallel star winding;

fig. 1a is an enlarged view of a wiring manner at the MCCB1 of the molded case relay of fig. 1;

fig. 1b is an enlarged view of a wiring manner at the MCCB2 of the molded case relay of fig. 1;

fig. 1c is an enlarged view of a wiring mode at the MCCB2 of the molded case relay of fig. 1;

FIG. 2 is a wiring device of the present invention when operating a generator output voltage series star winding;

fig. 2a is an enlarged view of a wiring manner at the MCCB1 of the molded case relay of fig. 2;

fig. 2b is an enlarged view of a wiring manner at the MCCB2 of the molded case relay of fig. 2;

fig. 2c is an enlarged view of the wiring pattern at MCCB3 of the molded case relay of fig. 2;

FIG. 3 is a partial wiring diagram of a genset controller DSE 7320;

fig. 3a is a wiring diagram of the relay KM 2;

fig. 3b is a wiring diagram of the relay KM 4;

FIG. 3c is a wiring diagram of the DC24V relay QF 1;

FIG. 3d is a wiring diagram of the DC24V relay QF 2;

FIG. 3e is a wiring diagram of a DC24V relay QF 3;

fig. 4 shows the parallel star connection method of the internal windings of the generator.

FIG. 5 shows a series star connection method for internal windings of the generator according to the present invention.

Symbol and reference numerals in the drawings illustrate:

t1. T12: 12 outgoing cables and serial numbers of generator winding

L1, L2, L3 generator AC output

MCCB: plastic case breaker for protecting alternating current output of generator set

MCCB1, MCCB2, MCCB3: plastic case breakers (built-in electric executing switch-on and switch-off mechanism)

YC: plastic case breaker MCCB1/2/3 internal closing coil

YO: plastic case breaker MCCB1/2/3 inner part gate coil

M is equal to or less than: plastic case breaker MCCB1/2/3 internal electric execution switching-on and switching-off mechanism

KM2: DC24V relay for controlling plastic case breaker MCCB1/2/3 on-off gate

KM4: DC24V relay for controlling plastic case breaker MCCB1/2/3 forced opening

QF1, QF2, QF3: DC24V relay for feeding back MCCB1/2/3 switching-on signal of molded case circuit breaker

FU11, FU12, FU21, FU22, FU31, FU32, FU1: fuse

Q/1, Q/2, Q/3: auxiliary contact for switching-on signal in plastic-case circuit breaker MCCB1/2/3

TB is 1/2/3/4/5/6: binding post row

SW1: storage battery switch

SW2: change-over control switch (series star type 460V)

Detailed Description

The present invention will be described in detail with reference to specific embodiments and drawings.

Referring to fig. 1, 2, 3,4 and 5, the present embodiment provides a generator output voltage wiring device, including a molded case circuit breaker MCCB1, a molded case circuit breaker MCCB2, a molded case circuit breaker MCCB3, a DC24V relay KM2, a DC24V relay KM4, a DC24V relay QF1, a DC24V relay QF2, a DC24V relay QF3, a generator set controller DSE7320 and a generator set load output circuit breaker MCCB; the plastic shell circuit breaker MCCB1, the plastic shell circuit breaker MCCB2 and the plastic shell circuit breaker MCCB3 are respectively internally provided with an electric execution switching-on and switching-off mechanism M-and a circuit breaker switching-on coil YC and a circuit breaker switching-off coil YO, and simultaneously are correspondingly internally provided with a DC24V relay QF1, a DC24V relay QF2 and a DC24V relay QF3, a switching-on feedback signal auxiliary contact Q/1, a switching-on feedback signal auxiliary contact Q/2 and a switching-on feedback signal auxiliary contact Q/3 respectively; the plastic case circuit breaker MCCB1, the plastic case circuit breaker MCCB2 and the plastic case circuit breaker MCCB3 can respectively correspond to feedback circuit breaker auxiliary contact closing signals.

The generator winding T10, the generator winding T11 and the generator winding T12 are short-circuited and connected to a first phase, a second phase and a third phase of an outlet end of the molded case circuit breaker MCCB2, and finally led out to an output neutral point of the generator N; the generator winding T4 is simultaneously connected to a first phase of the lead-in terminal of the molded case circuit breaker MCCB2 and the lead-in terminal of the molded case circuit breaker MCCB3, the generator winding T5 is simultaneously connected to a second phase of the lead-in terminal of the molded case circuit breaker MCCB2 and the lead-in terminal of the molded case circuit breaker MCCB3, and the generator winding T6 is simultaneously connected to a third phase of the lead-in terminal of the molded case circuit breaker MCCB2 and the lead-in terminal of the molded case circuit breaker MCCB 3;

the generator winding T7 is simultaneously connected to a first phase of the lead-out terminal of the molded case circuit breaker MCCB3 and the lead-in terminal of the molded case circuit breaker MCCB1, the generator winding T8 is simultaneously connected to a second phase of the lead-out terminal of the molded case circuit breaker MCCB3 and the lead-in terminal of the molded case circuit breaker MCCB1, and the generator winding T9 is simultaneously connected to a third phase of the lead-out terminal of the molded case circuit breaker MCCB3 and the lead-in terminal of the molded case circuit breaker MCCB 1;

the generator winding T1 is simultaneously connected to a first phase of the lead-out terminal of the molded case circuit breaker MCCB1 and the lead-in terminal of the generator set load output circuit breaker MCCB, the generator winding T2 is simultaneously connected to a second phase of the lead-out terminal of the molded case circuit breaker MCCB1 and the lead-in terminal of the generator set load output circuit breaker MCCB, and the generator winding T3 is simultaneously connected to a third phase of the lead-out terminal of the molded case circuit breaker MCCB1 and the lead-in terminal of the generator set load output circuit breaker MCCB.

For a clearer representation of some of the details in fig. 1 and 2, an enlarged illustration of fig. 1a, 1b and 1c is given for the wiring at MCCB1/2/3 of the moulded case relay in fig. 1; the mode of connection at the moulded case relay MCCB1/2/3 in figure 2 is given by the enlarged figures 2a, 2b and 2c.

With continued reference to fig. 3a, terminals No. 6, no. 71A, no. 71B, no. 71C, no. 5, no. 75A, no. 70A, no. 75B, no. 70C, no. 75C to No. 8,5,6, 13,7,3,1,4,2, 11,9 of DC24V relay KM2 are connected, respectively. Referring to fig. 3B, terminals No. 8,5,6, 13,7,3,4, 11 of the wire No. 8, wire No. 75A, wire No. 75B, wire No. 75C, wire No. 7, wire No. 73A, wire No. 73B, wire No. 73C to DC24V relay KM4 are connected, respectively. Referring to fig. 3c, terminals No. 76A, no. 20D, no. 32A, no. 20B to 8,5,7,1 of the DC24V relay QF1 are connected, respectively. Referring to fig. 3d, terminals No. 8,5,7,1 of the wire No. 76B, wire No. 20C, wire No. 32B, wire No. 20E to DC24V relay QF2 are connected, respectively. Referring to fig. 3e, terminals No. 8,5,7,3 of the wire No. 76C, wire No. 20, wire No. 32C, wire No. 20A to DC24V relay QF3 are connected, respectively.

The generator set controller DSE7320 is provided with a PLC control function, and is used for controlling the electric execution switching-on and switching-off mechanisms M to M of the plastic shell circuit breaker MCCB1, the plastic shell circuit breaker MCCB2 and the plastic shell circuit breaker MCCB3 by outputting a control signal to the DC24V relay KM2 or not, and is used for coordinating and uniformly controlling the respective electric execution switching-on and switching-off mechanisms M to M of the plastic shell circuit breaker MCCB1, the plastic shell circuit breaker MCCB2 and the plastic shell circuit breaker MCCB3 by electrically interlocking the control of the DC24V relay KM2, so that the internal windings of the generator set are automatically switched from a parallel star type to a series star type.

The generator set controller DSE7320 monitors states of the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and a closing feedback signal auxiliary contact corresponding to the molded case circuit breaker MCCB3 through an interlocking signal device consisting of a DC24V relay QF1, a DC24V relay QF2 and a DC24V relay QF 3; when the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3 is/are in error in the closing and opening positions (for example, when the molded case circuit breaker MCCB3 is closed, the molded case circuit breaker MCCB1 or the molded case circuit breaker MCCB2 is closed), the generator set controller DSE7320 immediately outputs a protection signal to the relay KM4 to realize forced opening of the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3, protects the internal windings of the generator, and outputs an alarm and stops operating the generator set.

The embodiment also provides a control protection method of the generator output voltage wiring device, which comprises the following steps:

s1: in the operation and use process, the generator set controller judges whether to output a molded case circuit breaker MCCB1, a molded case circuit breaker MCCB2 and/or a molded case circuit breaker MCCB3 on-off control signal through the built-in alternative protection parameters and the PLC operation protection parameters;

s2: when the parallel star-type generator in the default operation mode is executed to output AC230V voltage, the generator set controller DSE7320 outputs no positive signal to the DC24V relay KM2, so that control signals are respectively sent to the closing coils YC of the plastic case circuit breaker MCCB1 and the plastic case circuit breaker MCCB2 through the DC24V relay KM2, and the plastic case circuit breaker MCCB1 and the plastic case circuit breaker MCCB2 are positioned at closing positions; simultaneously, a control signal is sent to a breaking coil YO of the molded case circuit breaker MCCB3 through a DC24V relay KM2, so that the molded case circuit breaker MCCB3 is positioned at a breaking position; therefore, a star-shaped parallel connection mode of the internal windings of the generator is realized, and low-voltage AC230V output is realized; meanwhile, whether the plastic case circuit breaker MCCB1, the DC24V relay QF2 and the DC24V relay QF3 are at the correct switching-on and switching-off positions or not is detected through an electric interlocking combination of the switching-on feedback signal auxiliary contact Q/1, the switching-on feedback signal auxiliary contact Q/2 and the switching-on feedback signal auxiliary contact Q/3 of the plastic case circuit breaker MCCB1, the DC24V relay QF2 and the DC24V relay QF3, so that the plastic case circuit breaker MCCB1, the plastic case circuit breaker MCCB2 and the plastic case circuit breaker MCCB3 can accurately execute switching instructions of a generator set controller is ensured; the generator set controller automatically operates and controls the generator set through built-in low-voltage operation protection parameters, once the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3 have wrong switching-on and switching-off positions, the generator set controller DSE7320 receives feedback signals of a combination of a DC24V relay QF1, a DC24V relay QF2 and/or a DC24V relay QF3 of a molded case circuit breaker MCCB1, a molded case circuit breaker MCCB2 and/or a molded case circuit breaker MCCB3, and sends forced breaking signals to the DC24V relay KM4, and the generator set is protected by checking fault reasons through controlling a switching-off coil YO of the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB 3.

When the alternative parameter operation serial star-type generator outputs AC460V voltage, a control switch SW2 is switched on manually, a signal is input to a No. 52 input terminal of a generator set controller, a positive (+) signal of a No. 8 output terminal of a generator set controller DSE7320 is output to a DC24V relay KM2, and accordingly, a control signal is respectively sent to a breaking coil YO of a plastic case breaker MCCB1 and a plastic case breaker MCCB2 through the DC24V relay KM2, so that the plastic case breaker MCCB1 and the plastic case breaker MCCB2 are in breaking positions; simultaneously, a control signal is sent to a closing coil YC of the molded case circuit breaker MCCB3 through a DC24V relay KM2, so that the molded case circuit breaker MCCB3 is positioned at a closing position; therefore, a series star connection mode of the internal windings of the generator is realized, and high-voltage AC460V output is realized; meanwhile, whether the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3 are at the correct switching-on and switching-off positions or not is detected through the electric interlocking combination of the switching-on feedback signal auxiliary contact Q/1, the switching-on feedback signal auxiliary contact Q/2 and the switching-on feedback signal auxiliary contact Q/3 positions of the molded case circuit breaker MCCB1, the DC24V relay QF2 and the DC24V relay QF3, so that the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3 can accurately execute the switching instruction of the generator set controller DSE 7320; the generator set controller automatically operates and controls the generator set through built-in high-voltage AC460V operation protection parameters, once the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3 are overloaded or the false opening and closing positions triggered by manual misoperation and the like are generated, the generator set controller receives feedback signals of combination of the DC24V relay QF1, the DC24V relay QF2 and/or the DC24V relay QF3 of the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3, and sends forced breaking signals to the DC24V relay KM4, and forcedly breaks the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3 through controlling opening coils YO of the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3, so that the internal protection of the generator set is realized and the generator set is controlled to stop and the generator set is protected by the reasons of work personnel.

Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.

Claims (6)

1. The utility model provides a generator output voltage termination which characterized in that: the circuit breaker comprises a circuit breaker MCCB1, a circuit breaker MCCB2, a circuit breaker MCCB3, a relay KM2, a relay KM4, a relay QF1, a relay QF2, a relay QF3, a generator set controller and a generator set load output circuit breaker MCCB; the circuit breaker MCCB1, the circuit breaker MCCB2 and the circuit breaker MCCB3 are respectively internally provided with an electric execution switching-on and switching-off mechanism M-and a circuit breaker switching-on coil YC and a circuit breaker switching-off coil YO, and simultaneously are correspondingly internally provided with a relay QF1, a relay QF2, a relay QF3, a switching-on feedback signal auxiliary contact Q/1, a switching-on feedback signal auxiliary contact Q/2 and a switching-on feedback signal auxiliary contact Q/3 respectively; the circuit breaker MCCB1, the circuit breaker MCCB2 and the circuit breaker MCCB3 can respectively correspond to feedback auxiliary contact closing signals of the circuit breaker;

the generator winding T10, the generator winding T11 and the generator winding T12 are short-circuited and connected to a first phase, a second phase and a third phase of an outlet end of the circuit breaker MCCB2, and finally led out to an output neutral point of the generator N; the generator winding T4 is simultaneously connected to a first phase of the inlet of the circuit breaker MCCB2 and the inlet of the circuit breaker MCCB3, the generator winding T5 is simultaneously connected to a second phase of the inlet of the circuit breaker MCCB2 and the inlet of the circuit breaker MCCB3, and the generator winding T6 is simultaneously connected to a third phase of the inlet of the circuit breaker MCCB2 and the inlet of the circuit breaker MCCB 3;

the generator winding T7 is simultaneously connected to a first phase of the outlet terminal of the circuit breaker MCCB3 and the inlet terminal of the circuit breaker MCCB1, the generator winding T8 is simultaneously connected to a second phase of the outlet terminal of the circuit breaker MCCB3 and the inlet terminal of the circuit breaker MCCB1, and the generator winding T9 is simultaneously connected to a third phase of the outlet terminal of the circuit breaker MCCB3 and the inlet terminal of the circuit breaker MCCB 1;

the generator winding T1 is simultaneously connected to a first phase of the outlet terminal of the circuit breaker MCCB1 and the inlet terminal of the generator set load output circuit breaker MCCB, the generator winding T2 is simultaneously connected to a second phase of the outlet terminal of the circuit breaker MCCB1 and the inlet terminal of the generator set load output circuit breaker MCCB, and the generator winding T3 is simultaneously connected to a third phase of the outlet terminal of the circuit breaker MCCB1 and the inlet terminal of the generator set load output circuit breaker MCCB;

the power generating set controller is provided with a PLC control function, and is used for controlling the electric executing switching-on and switching-off mechanisms M to M of the circuit breaker MCCB1, the circuit breaker MCCB2 and the circuit breaker MCCB3 by outputting control signals to the relay KM2 or not, and coordinating and uniformly controlling the switching-on and switching-off of the electric executing switching-on and switching-off mechanisms M to M of the circuit breaker MCCB1, the circuit breaker MCCB2 and the circuit breaker MCCB3 by means of electric interlocking control relay KM2, so that the internal winding of the power generating set is automatically switched from a parallel star type to a serial star type.

2. The generator output voltage wiring device of claim 1, wherein: the generator set controller monitors states of the breaker MCCB1, the breaker MCCB2 and the closing feedback signal auxiliary contacts corresponding to the breaker MCCB3 through an interlocking signal device consisting of a relay QF1, a relay QF2 and a relay QF 3; when the breaker MCCB1, the breaker MCCB2 and/or the breaker MCCB3 are/is in the error of the on-off position, the generator set controller immediately outputs a protection signal to the relay KM4 to realize the forced off of the breaker MCCB1, the breaker MCCB2 and the breaker MCCB3, protect the internal winding of the generator and output an alarm and stop running the generator set.

3. The generator output voltage wiring device of claim 2, wherein: when the switching-on and switching-off position error is that the breaker MCCB3 is switched on, the breaker MCCB1 or the breaker MCCB2 is switched on.

4. A generator output voltage wiring device as claimed in any one of claims 1 to 3, wherein: the relays KM2 and KM4 are DC24V relays; the relay QF1, the relay QF2 and the relay QF3 are all DC24V relays; the circuit breaker MCCB1, the circuit breaker MCCB2 and the circuit breaker MCCB3 are all molded case circuit breakers; the genset controller is a DSE7320 controller.

5. A control protection method using the generator output voltage wiring device according to any one of claims 1 to 4, comprising the steps of:

s1: in the operation and use process, the generator set controller judges whether to output a molded case circuit breaker MCCB1, a molded case circuit breaker MCCB2 and/or a molded case circuit breaker MCCB3 on-off control signal through the built-in alternative protection parameters and the PLC operation protection parameters;

s2: when a default operation mode parallel star-type generator is executed to output AC230V voltage, the generator set controller outputs no positive signal to the relay KM2, so that control signals are respectively sent to closing coils YC of the plastic case circuit breaker MCCB1 and the plastic case circuit breaker MCCB2 through the relay KM2, and the plastic case circuit breaker MCCB1 and the plastic case circuit breaker MCCB2 are positioned at closing positions; simultaneously, a control signal is sent to a breaking coil YO of the molded case circuit breaker MCCB3 through a relay KM2, so that the MCCB3 is positioned at a breaking position; therefore, a star-shaped parallel connection mode of the internal windings of the generator is realized, and low-voltage AC230V output is realized; meanwhile, whether the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3 are at the correct on-off positions or not is detected through the electric interlocking combination of the closing feedback signal auxiliary contact Q/1, the closing feedback signal auxiliary contact Q/2 and the closing feedback signal auxiliary contact Q/3 of the molded case circuit breaker MCCB1, the molded case circuit breaker QF2 and the molded case circuit breaker QF3, so that the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3 can correctly execute the switching instruction of the generator set controller is ensured; the generator set controller automatically operates and controls the generator set through built-in low-voltage operation protection parameters, once the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3 have wrong switching-on and switching-off positions, the generator set controller receives feedback signals of relay QF1, relay QF2 and/or relay QF3 combined by the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3, and sends forced breaking signals to the relay KM4, and the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3 are forced to break through controlling the switching-off coils YO of the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3, so that shutdown protection of the generator set is protected, and the generator set is controlled, and fault reasons are checked by workers;

when the alternative parameter operation serial star-type generator outputs AC460V voltage, a control switch SW2 is switched on manually, a signal is input to a No. 52 input terminal of a generator set controller, and a No. 8 output terminal positive signal of the generator set controller is output to a relay KM2, so that a control signal is respectively sent to a molded case circuit breaker MCCB1 and a breaking coil YO of the molded case circuit breaker MCCB2 through the relay KM2, and the molded case circuit breaker MCCB1 and the molded case circuit breaker MCCB2 are positioned at a breaking position; meanwhile, a control signal is sent to a closing coil YC of the molded case circuit breaker MCCB3 through a relay KM2, so that the molded case circuit breaker MCCB3 is positioned at a closing position; therefore, a series star connection mode of the internal windings of the generator is realized, and high-voltage AC460V output is realized; meanwhile, whether the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3 are at the correct switching-on and switching-off positions or not is detected through the electric interlocking combination of the switching-on feedback signal auxiliary contact Q/1, the switching-on feedback signal auxiliary contact Q/2 and the switching-on feedback signal auxiliary contact Q/3 of the molded case circuit breaker MCCB1, the molded case circuit breaker QF2 and/or the molded case circuit breaker MCCB3, so that the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3 can accurately execute the switching instruction of the generator set controller is ensured; the generator set controller automatically operates and controls the generator set through built-in high-voltage AC460V operation protection parameters, once the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3 have wrong switching-on and switching-off positions, the generator set controller receives feedback signals of relay QF1, relay QF2 and/or relay QF3 combined by the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and/or the molded case circuit breaker MCCB3 switching-on signals and sends forced breaking signals to the relay KM4, and through controlling the switching-off coils YO of the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3, forced breaking of the molded case circuit breaker MCCB1, the molded case circuit breaker MCCB2 and the molded case circuit breaker MCCB3 is realized, so that the internal windings of the generator are protected and the generator set is controlled to stop and the fault causes are checked by workers.

6. The control and protection method according to claim 5, wherein: the incorrect switching-on and switching-off position is triggered by overload and/or human misoperation.