CN104538929A - Intertrip circuit avoiding self-excitation overvoltage of small hydro-generator - Google Patents
Intertrip circuit avoiding self-excitation overvoltage of small hydro-generator Download PDFInfo
- Publication number
- CN104538929A CN104538929A CN201510021621.2A CN201510021621A CN104538929A CN 104538929 A CN104538929 A CN 104538929A CN 201510021621 A CN201510021621 A CN 201510021621A CN 104538929 A CN104538929 A CN 104538929A
- Authority
- CN
- China
- Prior art keywords
- generator
- normally
- generator outlet
- circuit breaker
- trip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention relates to generators and provides an intertrip circuit avoiding self-excitation overvoltage of a small hydro-generator. The intertrip circuit comprises a long circuit input end, a main transformer, a generator outlet circuit breaker, a generator outlet disconnecting switch, a generator, a high voltage station transformer, a generator protecting module, an input end of the small hydro-generator, a first intertrip switch and a power input end. The long circuit input end is connected with the main transformer through a normally-closed contact of the first intertrip switch. One end is connected with the power input end and the other end is connected with one end of an outage coil of the first intertrip switch after the two ends of a normally-closed contact of the generator outlet circuit breaker and the two ends of a normally-closed contact of the generator outlet disconnecting switch are in parallel connection with the two ends of a normally-closed contact of the generator protecting module, the other end of the outage coil of the first intertrip switch is connected with the ground, and the disconnection duration of the first intertrip switch is smaller than that of the normally-closed contact of the generator outlet circuit breaker. The intertrip circuit is used for avoiding self-excitation overvoltage of the small hydro-generator.
Description
Technical field
The present invention relates to generator, particularly prevent small hydro turbine from excitatory superpotential jumping scheme.
Background technology
Due to the needs of environmental protection, part hydroelectric station has ecological small hydropower station, and these ecological small hydropower stations are often by its main electrical power plant online, in addition, some small hydropower stations are had also to be by neighbouring relatively large hydroelectric station online, so just there is a kind of situation: small hydropower station is by online with regard to the relative small plant of large hydropower station, because small hydropower station generator capacity is little, and large power station line voltage grade is high, circuit is long, charge power is relatively large, when large power station unit is all out of service and trip in outlet opposite end, small hydropower station unit band high voltage can be caused, long transmission line no-load running, thus cause small hydropower station unit from excitatory overvoltage, cause the damage of small hydropower station set generator.
Summary of the invention
Technical problem to be solved by this invention, just being to provide one prevents small hydro turbine from excitatory superpotential jumping circuit, small hydropower station unit band high voltage, long transmission line no-load running is prevented to reach, thus cause small hydropower station unit from excitatory overvoltage, cause the effect that small hydropower station set generator damages.
The present invention solve the technical problem, the technical scheme adopted is, prevent small hydro turbine from excitatory superpotential jumping circuit, comprise long transmission line input, main transformer, generator outlet circuit breaker, generator outlet isolating switch, generator, HV Auxiliary Transformer, Generator Protection Module and small hydro turbine input, described long transmission line input is connected with main transformer, main transformer is connected with generator outlet isolating switch and HV Auxiliary Transformer respectively, generator outlet isolating switch is connected with generator outlet circuit breaker, generator outlet circuit breaker is connected with generator, HV Auxiliary Transformer is connected with small hydro turbine input, generator outlet isolating switch, generator outlet circuit breaker, Generator Protection Module and generator one_to_one corresponding, normally opened contact is provided with in Generator Protection Module, described Generator Protection Module is used for, when generator failure, generator outlet circuit breaker normally-closed contact and/or the normally-closed contact of generator outlet isolating switch when opening, the normally opened contact of Generator Protection Module closes, also comprise connection TRIP one and power input, described long transmission line input is connected with main transformer by the normally-closed contact of connection TRIP one, generator outlet circuit breaker the two ends of normally-closed contact, the two ends of the two ends of the normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module are in parallel, one end after parallel connection is connected with power input, the other end after parallel connection is connected with one end of the power-off coil of connection TRIP one, the other end ground connection of the power-off coil of connection TRIP one, the disconnection duration of described TRIP one be less than generator outlet circuit breaker the disconnection duration of normally-closed contact.
Concrete, described generator outlet isolating switch, generator outlet circuit breaker, Generator Protection Module and generator are at least one respectively, and one_to_one corresponding.
Further; also comprise exclusive circuit and operation circuit; described generator outlet circuit breaker the two ends of normally-closed contact, the two ends of normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module is connected by operation circuit one end with the power-off coil of connection TRIP one after being connected in parallel, the other end of the power-off coil of connection TRIP one passes through locked loop ground connection.
Further, also comprise connection TRIP two, the power-off coil of described TRIP two and the power-off coils from parallel connection of coils of connection TRIP one, main transformer is connected with HV Auxiliary Transformer by the normally-closed contact of connection TRIP two.
Further, the disconnection duration of described TRIP two be less than generator outlet circuit breaker the disconnection duration of normally-closed contact.
Concrete, also comprise connection TRIP three, the power-off coil of described TRIP three and the power-off coils from parallel connection of coils of connection TRIP one, HV Auxiliary Transformer is connected with small hydro turbine input by the normally-closed contact of connection TRIP three.
Further, the disconnection duration of described TRIP three be less than generator outlet circuit breaker the disconnection duration of normally-closed contact.
Prevent small hydro turbine from excitatory superpotential jumping circuit, comprise long transmission line input, main transformer, generator outlet circuit breaker, generator outlet isolating switch, generator, HV Auxiliary Transformer, Generator Protection Module and small hydro turbine input, described long transmission line input is connected with main transformer, main transformer is connected with generator outlet isolating switch and HV Auxiliary Transformer respectively, generator outlet isolating switch is connected with generator outlet circuit breaker, generator outlet circuit breaker is connected with generator, HV Auxiliary Transformer is connected with small hydro turbine input, generator outlet isolating switch, generator outlet circuit breaker, Generator Protection Module and generator one_to_one corresponding, normally opened contact is provided with in Generator Protection Module, described Generator Protection Module is used for, when generator failure, generator outlet circuit breaker normally-closed contact and/or the normally-closed contact of generator outlet isolating switch when opening, the normally opened contact of Generator Protection Module closes, also comprise connection TRIP two and power input, described main transformer is connected with HV Auxiliary Transformer by connection TRIP two, generator outlet circuit breaker the two ends of normally-closed contact, the two ends of the two ends of the normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module are in parallel, one end after parallel connection is connected with power input, the other end after parallel connection is connected with one end of the power-off coil of connection TRIP two, the other end ground connection of the power-off coil of connection TRIP two, the disconnection duration of described TRIP two be less than generator outlet circuit breaker the disconnection duration of normally-closed contact.
Prevent small hydro turbine from excitatory superpotential jumping circuit, comprise long transmission line input, main transformer, generator outlet circuit breaker, generator outlet isolating switch, generator, HV Auxiliary Transformer, Generator Protection Module and small hydro turbine input, described long transmission line input is connected with main transformer, main transformer is connected with generator outlet isolating switch and HV Auxiliary Transformer respectively, generator outlet isolating switch is connected with generator outlet circuit breaker, generator outlet circuit breaker is connected with generator, HV Auxiliary Transformer is connected with small hydro turbine input, generator outlet isolating switch, generator outlet circuit breaker, Generator Protection Module and generator one_to_one corresponding, normally opened contact is provided with in Generator Protection Module, described Generator Protection Module is used for, when generator failure, generator outlet circuit breaker normally-closed contact and/or the normally-closed contact of generator outlet isolating switch when opening, the normally opened contact of Generator Protection Module closes, also comprise connection TRIP three and power input, described HV Auxiliary Transformer is connected with small hydro turbine input by connection TRIP three, generator outlet circuit breaker the two ends of normally-closed contact, the two ends of the two ends of the normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module are in parallel, one end after parallel connection is connected with power input, and one end that the other end after putting on record joins the power-off coil of TRIP three connects, the other end ground connection of the power-off coil of connection TRIP three, the disconnection duration of described TRIP three be less than generator outlet circuit breaker the disconnection duration of normally-closed contact.
Concrete, described generator outlet isolating switch, generator outlet circuit breaker, Generator Protection Module and generator are at least one respectively, and one_to_one corresponding.
The invention has the beneficial effects as follows, by being connected connection TRIP between long transmission line with main transformer, simultaneously by generator outlet circuit breaker the two ends of normally-closed contact, the two ends of normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module be connected in parallel into combination tripping operation contact circuit, then by this circuit with join TRIP one/join TRIP two/join TRIP three to be connected, when generator failure generator outlet circuit breaker normally-closed contact will disconnect, when generator maintenance, the normally-closed contact of generator outlet isolating switch will disconnect, above-mentioned arbitrary middle situation, the normally opened contact of Generator Protection Module will close, join TRIP one/connection TRIP two/connection TRIP three simultaneously and also can carry out connection jumping disconnection simultaneously, due to connection TRIP one/connection TRIP two/connection TRIP three disconnect generator outlet circuit breaker when duration is all shorter than generator failure the disconnection duration of normally-closed contact and/or the normally-closed contact of generator outlet isolating switch disconnection duration, therefore small hydro turbine can disconnect prior to generator and long transmission line input, thus protection small hydro turbine, prevent small hydro turbine from excitatory overvoltage,
Meanwhile, connection TRIP one, connection TRIP two and/or connection TRIP three are arranged on different tie points, and install is can ensure further to join the accuracy of jumping simultaneously, makes protected effect best.
Accompanying drawing explanation
Fig. 1 is the structure chart that the present invention prevents small hydro turbine prior art in excitatory superpotential jumping circuit embodiment;
Fig. 2 is that the present invention prevents small hydro turbine from excitatory superpotential jumping circuit embodiment, combining the structure chart of tripping operation contact;
Fig. 3 is that the present invention prevents small hydro turbine from excitatory superpotential jumping circuit embodiment, joining the structure chart of jumping circuit;
Fig. 4 is that the present invention prevents small hydro turbine from excitatory superpotential jumping circuit embodiment, joining TRIP johning knot composition;
Wherein, main transformer TM, generator outlet circuit breaker GCB, generator outlet isolating switch QS, generator G, HV Auxiliary Transformer THA, connection TRIP 1, connection TRIP 2 902, connection TRIP 3 302.
Embodiment
Technical scheme of the present invention is described in detail below in conjunction with drawings and Examples:
The present invention is directed in prior art because small hydropower station generator capacity is little, and large power station line voltage grade is high, circuit is long, charge power is relatively large, when large power station unit is all out of service and trip in outlet opposite end, small hydropower station unit band high voltage can be caused, long transmission line no-load running, thus cause small hydropower station unit from excitatory overvoltage, cause the problem that small hydropower station set generator damages, one is provided to prevent small hydro turbine from excitatory superpotential jumping circuit, comprise long transmission line input, main transformer, generator outlet circuit breaker, generator outlet isolating switch, generator, HV Auxiliary Transformer, Generator Protection Module and small hydro turbine input, described long transmission line input is connected with main transformer, main transformer is connected with generator outlet isolating switch and HV Auxiliary Transformer respectively, generator outlet isolating switch is connected with generator outlet circuit breaker, generator outlet circuit breaker is connected with generator, HV Auxiliary Transformer is connected with small hydro turbine input, generator outlet isolating switch, generator outlet circuit breaker, Generator Protection Module and generator one_to_one corresponding, normally opened contact is provided with in Generator Protection Module, described Generator Protection Module is used for, when generator failure, generator outlet circuit breaker normally-closed contact and/or the normally-closed contact of generator outlet isolating switch when opening, the normally opened contact of Generator Protection Module closes, also comprise connection TRIP one and power input, described long transmission line input is connected with main transformer by the normally-closed contact of connection TRIP one, generator outlet circuit breaker the two ends of normally-closed contact, the two ends of the two ends of the normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module are in parallel, one end after parallel connection is connected with power input, the other end after parallel connection is connected with one end of the power-off coil of connection TRIP one, the other end ground connection of the power-off coil of connection TRIP one, the disconnection duration of described TRIP one be less than generator outlet circuit breaker the disconnection duration of normally-closed contact.Prevent small hydro turbine from excitatory superpotential jumping circuit, comprise long transmission line input, main transformer, generator outlet circuit breaker, generator outlet isolating switch, generator, HV Auxiliary Transformer, Generator Protection Module and small hydro turbine input, described long transmission line input is connected with main transformer, main transformer is connected with generator outlet isolating switch and HV Auxiliary Transformer respectively, generator outlet isolating switch is connected with generator outlet circuit breaker, generator outlet circuit breaker is connected with generator, HV Auxiliary Transformer is connected with small hydro turbine input, generator outlet isolating switch, generator outlet circuit breaker, Generator Protection Module and generator one_to_one corresponding, normally opened contact is provided with in Generator Protection Module, described Generator Protection Module is used for, when generator failure, generator outlet circuit breaker normally-closed contact and/or the normally-closed contact of generator outlet isolating switch when opening, the normally opened contact of Generator Protection Module closes, also comprise connection TRIP two and power input, described main transformer is connected with HV Auxiliary Transformer by connection TRIP two, generator outlet circuit breaker the two ends of normally-closed contact, the two ends of the two ends of the normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module are in parallel, one end after parallel connection is connected with power input, the other end after parallel connection is connected with one end of the power-off coil of connection TRIP two, the other end ground connection of the power-off coil of connection TRIP two, the disconnection duration of described TRIP two be less than generator outlet circuit breaker the disconnection duration of normally-closed contact.Prevent small hydro turbine from excitatory superpotential jumping circuit, comprise long transmission line input, main transformer, generator outlet circuit breaker, generator outlet isolating switch, generator, HV Auxiliary Transformer, Generator Protection Module and small hydro turbine input, described long transmission line input is connected with main transformer, main transformer is connected with generator outlet isolating switch and HV Auxiliary Transformer respectively, generator outlet isolating switch is connected with generator outlet circuit breaker, generator outlet circuit breaker is connected with generator, HV Auxiliary Transformer is connected with small hydro turbine input, generator outlet isolating switch, generator outlet circuit breaker, Generator Protection Module and generator one_to_one corresponding, normally opened contact is provided with in Generator Protection Module, described Generator Protection Module is used for, when generator failure, generator outlet circuit breaker normally-closed contact and/or the normally-closed contact of generator outlet isolating switch when opening, the normally opened contact of Generator Protection Module closes, also comprise connection TRIP three and power input, described HV Auxiliary Transformer is connected with small hydro turbine input by connection TRIP three, generator outlet circuit breaker the two ends of normally-closed contact, the two ends of the two ends of the normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module are in parallel, one end after parallel connection is connected with power input, and one end that the other end after putting on record joins the power-off coil of TRIP three connects, the other end ground connection of the power-off coil of connection TRIP three, the disconnection duration of described TRIP three be less than generator outlet circuit breaker the disconnection duration of normally-closed contact.By being connected connection TRIP between long transmission line with main transformer, simultaneously by generator outlet circuit breaker the two ends of normally-closed contact, the two ends of normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module be connected in parallel into combination tripping operation contact circuit, then by this circuit with join TRIP one/join TRIP two/join TRIP three to be connected, when generator failure generator outlet circuit breaker normally-closed contact will disconnect, when generator maintenance, the normally-closed contact of generator outlet isolating switch will disconnect, above-mentioned arbitrary middle situation, the normally opened contact of Generator Protection Module will close, join TRIP one/connection TRIP two/connection TRIP three simultaneously and also can carry out connection jumping disconnection simultaneously, due to connection TRIP one/connection TRIP two/connection TRIP three disconnect generator outlet circuit breaker when duration is all shorter than generator failure the disconnection duration of normally-closed contact and/or the normally-closed contact of generator outlet isolating switch disconnection duration, therefore small hydro turbine can disconnect prior to generator and long transmission line input, thus protection small hydro turbine, prevent small hydro turbine from excitatory overvoltage, meanwhile, connection TRIP one, connection TRIP two and/or connection TRIP three are arranged on different tie points, and install is can ensure further to join the accuracy of jumping simultaneously, makes protected effect best.
Embodiment 1
At present, due to the needs of environmental protection, part hydroelectric station has ecological small hydropower station, and these ecological small hydropower stations are often by its main electrical power plant online, in addition, some small hydropower stations are had also to be by neighbouring relatively large hydroelectric station online, so just there is a kind of situation: small hydropower station is by online with regard to the relative small plant of large hydropower station, because small hydropower station generator capacity is little, and large power station line voltage grade is high, circuit is long, charge power is relatively large, when large power station unit is all out of service and trip in outlet opposite end, small hydropower station unit band high voltage can be caused, long transmission line no-load running, thus cause small hydropower station unit from excitatory overvoltage, cause the damage of small hydropower station set generator.In prior art, for the technical scheme preventing this situation from adopting, as shown in Figure 1, main line configures reactor, although and configuration reactor can solve from excitatory overvoltage problem from mechanism, bring investment increase, as shown in Figure 1 shown in solid box, need to increase a set of anti-electrical equipment and a set of switchgear, and also there will be the longer supply of material and installation period problem, the operation on schedule of unit can be affected to a certain extent.
And this example provides a kind of connection of innovation to jump scheme, namely at the whole unit of the main electrical power plant front instantaneous major loop switch of jumping little unit access long transmission line and running out of service, prevent little unit band high voltage long transmission line from running.This scheme does not have other to invest except a small amount of cable and wiring substantially, thus saves investment, and realizes easily.And fundamentally can stop small hydropower station unit because causing situation about damaging from excitatory overvoltage.Concrete scheme is as follows:
Step 1, according to main line situation, Chu Xuan major loop switch:
Main line circuit comprises long transmission line input, main transformer TM, generator outlet circuit breaker GCB, generator outlet isolating switch QS, generator G, HV Auxiliary Transformer THA, Generator Protection Module and small hydro turbine input, described long transmission line input is connected with main transformer TM, main transformer TM is connected with generator outlet isolating switch QS and HV Auxiliary Transformer THA respectively, generator outlet isolating switch QS is connected with generator outlet circuit breaker GCB, generator outlet circuit breaker GCB is connected with generator G, HV Auxiliary Transformer THA is connected with small hydro turbine input, generator outlet isolating switch QS, generator outlet circuit breaker GCB, Generator Protection Module and generator G one_to_one corresponding, normally opened contact is provided with in Generator Protection Module, described Generator Protection Module is used for, when generator G breaks down or overhauls, the normally-closed contact of the GCB of generator outlet circuit breaker and/or the normally-closed contact of generator outlet isolating switch QS are opened, the normally opened contact of Generator Protection Module closes.Main line connects and working method is all technological means common in prior art, repeats no more herein.
According to main line connected mode, can be selected in install between long transmission line input and main transformer TM and join TRIP 1, thus long transmission line input is connected with main transformer TM by the normally-closed contact of connection TRIP 1.
Step 2, calculating connection TRIP 1, the normally-closed contact of GCB of generator outlet circuit breaker and the disconnection duration of the normally-closed contact of generator outlet isolating switch QS:
It is required to determine that it connection TRIP 1 is circuit breaker, and the disconnection duration of the normally-closed contact of this circuit breaker is less than the disconnection duration of the normally-closed contact of the GCB of generator outlet circuit breaker and the normally-closed contact of generator outlet isolating switch QS.Only in this way, during last generator failure tripping operation of the large power station of guarantee, the major loop switch that small hydro turbine access high voltage long transmission line runs disconnects prior to last generator circuit breaker, and the operating mode preventing small hydro turbine free band high voltage long transmission line from running occurs.
Step 3, composite design tripping operation contact:
Concrete, as shown in Figure 2, this example employing two generators are all supporting has generator outlet circuit breaker, generator outlet isolating switch and Generator Protection Module to be example.The two ends of the normally-closed contact of the GCB1 of generator outlet circuit breaker one, the two ends of the normally-closed contact of generator outlet isolating switch one QS1 and the normally opened contact of Generator Protection Module one F1 are connected in parallel composition one group combination tripping operation contact.The two ends of the normally-closed contact of the GCB2 of generator outlet circuit breaker two, the two ends of the normally-closed contact of generator outlet isolating switch two QS2 and the normally opened contact of Generator Protection Module two F2 are connected in parallel another group combination tripping operation contact of composition.The series connection of two groups of combination tripping operation contacts, specifically as shown in Figure 2.Wherein, when generator one G1 breaks down or overhauls, the normally-closed contact of generator outlet circuit breaker one GCB1 and/or the normally-closed contact of generator outlet isolating switch one QS1 are opened, and the normally opened contact of Generator Protection Module one F1 closes.When generator two G2 breaks down or overhauls, the normally-closed contact of the GCB2 of generator outlet circuit breaker two and/or the normally-closed contact of generator outlet isolating switch two QS2 are opened, and the normally opened contact of Generator Protection Module two F2 closes.
Step 4, design connection jumper:
Concrete; as shown in Figure 3; that the combination tripping operation contact in step 3 is linked in the trip(ping) circuit of connection TRIP respectively; operation circuit and exclusive circuit is also comprised in trip(ping) circuit; be connected with operation circuit after the two ends of the normally-closed contact of the GCB of described generator outlet circuit breaker, the two ends of normally-closed contact of generator outlet isolating switch QS and the normally opened contact of Generator Protection Module are connected in parallel; operation circuit is connected with one end of the power-off coil of connection TRIP 1, and the other end of the power-off coil of connection TRIP 1 is connected with locked loop.Wherein, operation circuit and exclusive circuit are all the common circuit modules of prior art connection jumping circuit, repeat no more herein.
When generator failure generator outlet circuit breaker normally-closed contact will disconnect; when people one by one platform generator maintenance time; the normally-closed contact of generator outlet isolating switch will disconnect; above-mentioned arbitrary middle situation; the normally opened contact of Generator Protection Module will close; when all generators are all in fault or service mode, when the normally opened contact of Generator Protection Module one F1 and the normally opened contact of Generator Protection Module two F2 all close, form loop.Connection TRIP carries out connection for a moment simultaneously and jumps disconnection; due to connection TRIP one disconnect generator outlet circuit breaker when duration is all shorter than generator failure the disconnection duration of normally-closed contact and/or the normally-closed contact of generator outlet isolating switch disconnection duration; therefore small hydro turbine can disconnect prior to generator and long transmission line input; thus protection small hydro turbine, prevent small hydro turbine from excitatory overvoltage.
Embodiment 2
The other technologies scheme of this example and embodiment 1 basic simlarity, its difference is, in this example, according to main line connected mode, connection TRIP 2 902 can be selected between main transformer TM and HV Auxiliary Transformer THA, and main transformer TM is connected with HV Auxiliary Transformer THA by the normally-closed contact of connection TRIP 2 902.It is required to determine that it connection TRIP 2 902 is circuit breaker, and the disconnection duration of the normally-closed contact of this circuit breaker is less than the disconnection duration of the normally-closed contact of the GCB of generator outlet circuit breaker and the normally-closed contact of generator outlet isolating switch QS.
Concrete; be connected with operation circuit after the two ends of the normally-closed contact of the GCB of generator outlet circuit breaker, the two ends of normally-closed contact of generator outlet isolating switch QS and the normally opened contact of Generator Protection Module are connected in parallel; operation circuit is connected with one end of the power-off coil of connection TRIP 2 902, and the other end of the power-off coil of connection TRIP 2 902 is connected with locked loop.Wherein, operation circuit and exclusive circuit are all the common circuit modules of prior art connection jumping circuit, repeat no more herein.
When generator failure generator outlet circuit breaker normally-closed contact will disconnect; when people one by one platform generator maintenance time; the normally-closed contact of generator outlet isolating switch will disconnect; above-mentioned arbitrary middle situation; the normally opened contact of Generator Protection Module will close; when all generators are all in fault or service mode, when the normally opened contact of Generator Protection Module one F1 and the normally opened contact of Generator Protection Module two F2 all close, form loop.Connection TRIP 2 902 coil obtains electric; normally-closed contact is opened; carry out connection and jump disconnection; due to connection TRIP two disconnect generator outlet circuit breaker when duration is all shorter than generator failure the disconnection duration of normally-closed contact and/or the normally-closed contact of generator outlet isolating switch disconnection duration; therefore small hydro turbine can disconnect prior to generator and long transmission line input; thus protection small hydro turbine, prevent small hydro turbine from excitatory overvoltage.
Embodiment 3
The other technologies scheme of this example and embodiment 1 or embodiment 2 basic simlarity, its difference is, in this example, according to main line connected mode, connection TRIP 3 302 can be selected between HV Auxiliary Transformer THA and small hydro turbine input, and HV Auxiliary Transformer THA is connected with small hydro turbine input by the normally-closed contact of connection TRIP 3 302.It is required to determine that it connection TRIP 3 302 is circuit breaker, and the disconnection duration of the normally-closed contact of this circuit breaker is less than the disconnection duration of the normally-closed contact of the GCB of generator outlet circuit breaker and the normally-closed contact of generator outlet isolating switch QS.
Concrete; be connected with operation circuit after the two ends of the normally-closed contact of the GCB of generator outlet circuit breaker, the two ends of normally-closed contact of generator outlet isolating switch QS and the normally opened contact of Generator Protection Module are connected in parallel; operation circuit is connected with one end of the power-off coil of connection TRIP 3 302, and the other end of the power-off coil of connection TRIP 3 302 is connected with locked loop.Wherein, operation circuit and exclusive circuit are all the common circuit modules of prior art connection jumping circuit, repeat no more herein.
When generator failure generator outlet circuit breaker normally-closed contact will disconnect; when people one by one platform generator maintenance time; the normally-closed contact of generator outlet isolating switch will disconnect; above-mentioned arbitrary middle situation; the normally opened contact of Generator Protection Module will close; when all generators are all in fault or service mode, when the normally opened contact of Generator Protection Module one F1 and the normally opened contact of Generator Protection Module two F2 all close, form loop.Connection TRIP 3 302 coil obtains electric; normally-closed contact is opened; carry out connection and jump disconnection; due to connection TRIP 3 302 disconnect generator outlet circuit breaker when duration is all shorter than generator failure the disconnection duration of normally-closed contact and/or the normally-closed contact of generator outlet isolating switch disconnection duration; therefore small hydro turbine can disconnect prior to generator and long transmission line input; thus protection small hydro turbine, prevent small hydro turbine from excitatory overvoltage.
Embodiment 4
This example in conjunction with the embodiments 1 and embodiment 2, according to main line connected mode, selected connection TRIP 1 and connection TRIP 2 902 simultaneously, main transformer TM is connected with HV Auxiliary Transformer THA by the normally-closed contact of connection TRIP 2 902.Long transmission line input is connected with main transformer TM by the normally-closed contact of connection TRIP 1.The power-off coil of connection TRIP 1 and the power-off coils from parallel connection of coils of connection TRIP 2 902 connect, and concrete connected mode is identical with the connected mode in embodiment 1-2.
Two place's connection TRIPs are installed simultaneously, and ensure the disconnection duration of two place's connection normally-closed contacts being all shorter than the GCB of generator outlet circuit breaker opening time of TRIP and the normally-closed contact of generator outlet isolating switch QS.Can ensure further to join the accuracy of jumping, thus guarantee that small hydro turbine disconnects prior to generator and long transmission line input, thus protection small hydro turbine, prevent small hydro turbine from excitatory overvoltage.
Embodiment 5
This example in conjunction with the embodiments 1 and embodiment 3, according to main line connected mode, selected connection TRIP 1 and connection TRIP 3 302 simultaneously, HV Auxiliary Transformer THA is connected with small hydro turbine input by the normally-closed contact of connection TRIP 3 302, and long transmission line input is connected with main transformer TM by the normally-closed contact of connection TRIP 1.The power-off coil of connection TRIP 1 and the power-off coils from parallel connection of coils of connection TRIP 3 302 connect, and concrete connected mode is identical with the connected mode in embodiment 1 and embodiment 3.
Two place's connection TRIPs are installed simultaneously, and ensure the disconnection duration of two place's connection normally-closed contacts being all shorter than the GCB of generator outlet circuit breaker opening time of TRIP and the normally-closed contact of generator outlet isolating switch QS.Can ensure further to join the accuracy of jumping, thus guarantee that small hydro turbine disconnects prior to generator and long transmission line input, thus protection small hydro turbine, prevent small hydro turbine from excitatory overvoltage.
Embodiment 6
This example in conjunction with the embodiments 2 and embodiment 3, according to main line connected mode, selected connection TRIP 2 902 and connection TRIP 3 302 simultaneously, HV Auxiliary Transformer THA is connected with small hydro turbine input by the normally-closed contact of connection TRIP 3 302, and main transformer TM is connected with HV Auxiliary Transformer THA by the normally-closed contact of connection TRIP 2 902.The power-off coil of connection TRIP 3 302 and the power-off coils from parallel connection of coils of connection TRIP 2 902 connect, and concrete connected mode is identical with the connected mode in embodiment 2-3.
Two place's connection TRIPs are installed simultaneously, and ensure the disconnection duration of two place's connection normally-closed contacts being all shorter than the GCB of generator outlet circuit breaker opening time of TRIP and the normally-closed contact of generator outlet isolating switch QS.Can ensure further to join the accuracy of jumping, thus guarantee that small hydro turbine disconnects prior to generator and long transmission line input, thus protection small hydro turbine, prevent small hydro turbine from excitatory overvoltage.
Embodiment 7
This example in conjunction with the embodiments 1, embodiment 2 and embodiment 3, as shown in Figure 4, according to main line connected mode, selected connection TRIP 1, connection TRIP 2 902 and connection TRIP 3 302 simultaneously, long transmission line input is connected with main transformer TM by the normally-closed contact of connection TRIP 1, HV Auxiliary Transformer THA is connected with small hydro turbine input by the normally-closed contact joining TRIP 3 302, and main transformer TM is connected with HV Auxiliary Transformer THA by the normally-closed contact of connection TRIP 2 902.The power-off coil of connection TRIP 3 302 and the power-off coils from parallel connection of coils of connection TRIP 2 902 connect, and concrete connected mode is identical with the connected mode in embodiment 1-3.
Three place's connection TRIPs are installed simultaneously, and ensure the disconnection duration of three place's connection normally-closed contacts being all shorter than the GCB of generator outlet circuit breaker opening time of TRIP and the normally-closed contact of generator outlet isolating switch QS.More a step can ensure the accuracy that connection is jumped, thus guarantee that small hydro turbine disconnects prior to generator and long transmission line input, thus protection small hydro turbine, prevent small hydro turbine from excitatory overvoltage.
In sum, the present invention by being connected connection TRIP between long transmission line with main transformer, simultaneously by generator outlet circuit breaker the two ends of normally-closed contact, the two ends of normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module be connected in parallel into combination tripping operation contact circuit, then by this circuit with join TRIP one/join TRIP two/join TRIP three to be connected, when generator failure generator outlet circuit breaker normally-closed contact will disconnect, when generator maintenance, the normally-closed contact of generator outlet isolating switch will disconnect, above-mentioned arbitrary middle situation, the normally opened contact of Generator Protection Module will close, join TRIP one/connection TRIP two/connection TRIP three simultaneously and also can carry out connection jumping disconnection simultaneously, due to connection TRIP one/connection TRIP two/connection TRIP three disconnect generator outlet circuit breaker when duration is all shorter than generator failure the disconnection duration of normally-closed contact and/or the normally-closed contact of generator outlet isolating switch disconnection duration, therefore small hydro turbine can disconnect prior to generator and long transmission line input, thus protection small hydro turbine, prevent small hydro turbine from excitatory overvoltage, meanwhile, connection TRIP one, connection TRIP two and/or connection TRIP three are arranged on different tie points, and install is can ensure further to join the accuracy of jumping simultaneously, makes protected effect best.
Claims (10)
1. prevent small hydro turbine from excitatory superpotential jumping circuit, comprise long transmission line input, main transformer, generator outlet circuit breaker, generator outlet isolating switch, generator, HV Auxiliary Transformer, Generator Protection Module and small hydro turbine input, described long transmission line input is connected with main transformer, main transformer is connected with generator outlet isolating switch and HV Auxiliary Transformer respectively, generator outlet isolating switch is connected with generator outlet circuit breaker, generator outlet circuit breaker is connected with generator, HV Auxiliary Transformer is connected with small hydro turbine input, generator outlet isolating switch, generator outlet circuit breaker, Generator Protection Module and generator one_to_one corresponding, normally opened contact is provided with in Generator Protection Module, described Generator Protection Module is used for, when generator failure, generator outlet circuit breaker normally-closed contact and/or the normally-closed contact of generator outlet isolating switch when opening, the normally opened contact of Generator Protection Module closes, it is characterized in that, also comprise connection TRIP one and power input, described long transmission line input is connected with main transformer by the normally-closed contact of connection TRIP one, generator outlet circuit breaker the two ends of normally-closed contact, the two ends of the two ends of the normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module are in parallel, one end after parallel connection is connected with power input, the other end after parallel connection is connected with one end of the power-off coil of connection TRIP one, the other end ground connection of the power-off coil of connection TRIP one, the disconnection duration of described TRIP one be less than generator outlet circuit breaker the disconnection duration of normally-closed contact.
2. the small hydro turbine that prevents according to claim 1 is from excitatory superpotential jumping circuit; it is characterized in that; described generator outlet isolating switch, generator outlet circuit breaker, Generator Protection Module and generator are at least one respectively, and one_to_one corresponding.
3. the small hydro turbine that prevents according to claim 2 is from excitatory superpotential jumping circuit; it is characterized in that; also comprise exclusive circuit and operation circuit; described generator outlet circuit breaker the two ends of normally-closed contact, the two ends of normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module is connected by operation circuit one end with the power-off coil of connection TRIP one after being connected in parallel, the other end of the power-off coil of connection TRIP one passes through locked loop ground connection.
4. the small hydro turbine that prevents according to claim 3 is from excitatory superpotential jumping circuit, it is characterized in that, also comprise connection TRIP two, the power-off coil of described TRIP two and the power-off coils from parallel connection of coils of connection TRIP one, main transformer is connected with HV Auxiliary Transformer by the normally-closed contact of connection TRIP two.
5. the small hydro turbine that prevents according to claim 4 is from excitatory superpotential jumping circuit, it is characterized in that, the disconnection duration of described TRIP two be less than generator outlet circuit breaker the disconnection duration of normally-closed contact.
6. according to claim 1 or 4, prevent small hydro turbine from excitatory superpotential jumping circuit, it is characterized in that, also comprise connection TRIP three, the power-off coil of described TRIP three and the power-off coils from parallel connection of coils of connection TRIP one, HV Auxiliary Transformer is connected with small hydro turbine input by the normally-closed contact of connection TRIP three.
7. the small hydro turbine that prevents according to claim 6 is from excitatory superpotential jumping circuit, it is characterized in that, the disconnection duration of described TRIP three be less than generator outlet circuit breaker the disconnection duration of normally-closed contact.
8. prevent small hydro turbine from excitatory superpotential jumping circuit, comprise long transmission line input, main transformer, generator outlet circuit breaker, generator outlet isolating switch, generator, HV Auxiliary Transformer, Generator Protection Module and small hydro turbine input, described long transmission line input is connected with main transformer, main transformer is connected with generator outlet isolating switch and HV Auxiliary Transformer respectively, generator outlet isolating switch is connected with generator outlet circuit breaker, generator outlet circuit breaker is connected with generator, HV Auxiliary Transformer is connected with small hydro turbine input, generator outlet isolating switch, generator outlet circuit breaker, Generator Protection Module and generator one_to_one corresponding, normally opened contact is provided with in Generator Protection Module, described Generator Protection Module is used for, when generator failure, generator outlet circuit breaker normally-closed contact and/or the normally-closed contact of generator outlet isolating switch when opening, the normally opened contact of Generator Protection Module closes, it is characterized in that, also comprise connection TRIP two and power input, described main transformer is connected with HV Auxiliary Transformer by connection TRIP two, generator outlet circuit breaker the two ends of normally-closed contact, the two ends of the two ends of the normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module are in parallel, one end after parallel connection is connected with power input, the other end after parallel connection is connected with one end of the power-off coil of connection TRIP two, the other end ground connection of the power-off coil of connection TRIP two, the disconnection duration of described TRIP two be less than generator outlet circuit breaker the disconnection duration of normally-closed contact.
9. prevent small hydro turbine from excitatory superpotential jumping circuit, comprise long transmission line input, main transformer, generator outlet circuit breaker, generator outlet isolating switch, generator, HV Auxiliary Transformer, Generator Protection Module and small hydro turbine input, described long transmission line input is connected with main transformer, main transformer is connected with generator outlet isolating switch and HV Auxiliary Transformer respectively, generator outlet isolating switch is connected with generator outlet circuit breaker, generator outlet circuit breaker is connected with generator, HV Auxiliary Transformer is connected with small hydro turbine input, generator outlet isolating switch, generator outlet circuit breaker, Generator Protection Module and generator one_to_one corresponding, normally opened contact is provided with in Generator Protection Module, described Generator Protection Module is used for, when generator failure, generator outlet circuit breaker normally-closed contact and/or the normally-closed contact of generator outlet isolating switch when opening, the normally opened contact of Generator Protection Module closes, it is characterized in that, also comprise connection TRIP three and power input, described HV Auxiliary Transformer is connected with small hydro turbine input by connection TRIP three, generator outlet circuit breaker the two ends of normally-closed contact, the two ends of the two ends of the normally-closed contact of generator outlet isolating switch and the normally opened contact of Generator Protection Module are in parallel, one end after parallel connection is connected with power input, and one end that the other end after putting on record joins the power-off coil of TRIP three connects, the other end ground connection of the power-off coil of connection TRIP three, the disconnection duration of described TRIP three be less than generator outlet circuit breaker the disconnection duration of normally-closed contact.
10. the small hydro turbine that prevents according to claim 9 is from excitatory superpotential jumping circuit; it is characterized in that; described generator outlet isolating switch, generator outlet circuit breaker, Generator Protection Module and generator are at least one respectively, and one_to_one corresponding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510021621.2A CN104538929B (en) | 2015-01-16 | 2015-01-16 | Prevent shunt tripping circuit of the small hydro turbine from excitatory overvoltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510021621.2A CN104538929B (en) | 2015-01-16 | 2015-01-16 | Prevent shunt tripping circuit of the small hydro turbine from excitatory overvoltage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104538929A true CN104538929A (en) | 2015-04-22 |
| CN104538929B CN104538929B (en) | 2018-01-26 |
Family
ID=52854421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510021621.2A Active CN104538929B (en) | 2015-01-16 | 2015-01-16 | Prevent shunt tripping circuit of the small hydro turbine from excitatory overvoltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104538929B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109150039A (en) * | 2018-10-19 | 2019-01-04 | 嘉陵江亭子口水利水电开发有限公司 | excitation system and control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201202584Y (en) * | 2008-05-26 | 2009-03-04 | 刘志平 | Splashing-proof and signal apparatus of small-sized hydroelectric generating set |
| CN201351572Y (en) * | 2008-02-29 | 2009-11-25 | 丰孝治 | Automatic protection and shutdown device for grid-dropout of small hydraulic generator |
| CN201615023U (en) * | 2009-09-16 | 2010-10-27 | 姜宏伟 | Automatic power-off device after tripping operation of small-sized water wheel generator |
| CN204391686U (en) * | 2015-01-16 | 2015-06-10 | 中国电建集团成都勘测设计研究院有限公司 | Prevent small hydro turbine from excitatory superpotential circuit |
-
2015
- 2015-01-16 CN CN201510021621.2A patent/CN104538929B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201351572Y (en) * | 2008-02-29 | 2009-11-25 | 丰孝治 | Automatic protection and shutdown device for grid-dropout of small hydraulic generator |
| CN201202584Y (en) * | 2008-05-26 | 2009-03-04 | 刘志平 | Splashing-proof and signal apparatus of small-sized hydroelectric generating set |
| CN201615023U (en) * | 2009-09-16 | 2010-10-27 | 姜宏伟 | Automatic power-off device after tripping operation of small-sized water wheel generator |
| CN204391686U (en) * | 2015-01-16 | 2015-06-10 | 中国电建集团成都勘测设计研究院有限公司 | Prevent small hydro turbine from excitatory superpotential circuit |
Non-Patent Citations (1)
| Title |
|---|
| 龚迈明: "桃花江水电站保护系统的改进措施", 《湖南水利水电》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109150039A (en) * | 2018-10-19 | 2019-01-04 | 嘉陵江亭子口水利水电开发有限公司 | excitation system and control method |
| CN109150039B (en) * | 2018-10-19 | 2024-03-08 | 嘉陵江亭子口水利水电开发有限公司 | Excitation system and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104538929B (en) | 2018-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102570496A (en) | Fault-ride-through method, converter and power generating unit for a wind turbine | |
| CN104362579A (en) | Method for increasing reclosing success rates of tie lines of clustered wind power plants | |
| Jiang-Hafner et al. | Stability enhancement and blackout prevention by VSC based HVDC | |
| Lee et al. | Lessons learned from the blackout accident at a nuclear power plant in Taiwan | |
| CN204391686U (en) | Prevent small hydro turbine from excitatory superpotential circuit | |
| CN203722250U (en) | Photovoltaic device | |
| CN104538929A (en) | Intertrip circuit avoiding self-excitation overvoltage of small hydro-generator | |
| Emhemed et al. | Protection analysis for plant rating and power quality issues in LVDC distribution power systems | |
| Franken et al. | Collection grid topologies for off-shore wind parks | |
| Nilsson et al. | Application examples of the thyristor controlled series capacitor | |
| Kilani et al. | North Africa grid interconnection weakness: Impact on the Tunisian PES emergencies | |
| Benasla et al. | Benefits of HVDC for reducing the risk of cascading outages and large blackouts in AC/DC hybrid grid | |
| Yinger | Self-healing circuits at southern California Edison | |
| CN107482613A (en) | A kind of transformer station direct current system based on DC/DC isolation modules | |
| CN104124749B (en) | The dual-ring network distribution line failure processing method that prepared auto restart coordinates with power distribution automation | |
| CN102594114B (en) | Cophase supply current transformer system | |
| Westerweller et al. | Crossing the divide [Basslink HVDC interconnector] | |
| CN109802431A (en) | A kind of new-energy grid-connected progress control method and system | |
| Kirby et al. | Extending their lifetimes: Keeping HVdc and FACTS installations in service longer | |
| Hamida et al. | Review of PES Failures and Lessons Learned from the Tunisian Blackout of August 2014. | |
| CN216851313U (en) | Wind-powered electricity generation field current collection circuit of circuit breaker converges system on area post | |
| CN220475213U (en) | A trouble rush-repair device and block terminal for subway illumination block terminal | |
| Zare et al. | Mitigation of power system blackout by blocking zone3 of minimum distance relays | |
| WO2017097308A1 (en) | A wind power plant | |
| Goh et al. | 1500 V DC traction system for the North East Line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |