CN110137902A - One kind prevents flexible direct current power module by-pass switch from refusing combined floodgate circuit and method - Google Patents
One kind prevents flexible direct current power module by-pass switch from refusing combined floodgate circuit and method Download PDFInfo
- Publication number
- CN110137902A CN110137902A CN201910513831.1A CN201910513831A CN110137902A CN 110137902 A CN110137902 A CN 110137902A CN 201910513831 A CN201910513831 A CN 201910513831A CN 110137902 A CN110137902 A CN 110137902A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/063—Details concerning the co-operation of many similar arrangements, e.g. in a network
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to one kind to prevent flexible direct current power module by-pass switch from refusing combined floodgate circuit and method.The present invention can in real time be monitored a plurality of circuit, after circuit is interrupted, voltage sampling apparatus monitors that resistance both ends current potential is reduced to 0, judge that circuit is interrupted, signal is sent to power module control system, power module control system issues combined floodgate order by an other closing circuit, this power module is bypassed, avoid bypassing it is unsuccessful cause whole circuit to open a way, in turn result in direct current tripping.
Description
Technical field
It is more specifically to be related to one kind that present patent application, which belongs to flexible direct current power module by-pass switch technical field,
Prevent flexible direct current power module by-pass switch from refusing combined floodgate circuit and method.
Background technique
In flexible DC transmission technology, flexible direct current converter valve is made of flexible direct current power module, flexible direct current function
Rate module is made of IGBT/ energy-storage capacitor/by-pass switch/anti-paralleled diode/control plate etc., is when power module controls
When system or IGBT break down, this power module is bypassed by issuing bypass combined floodgate order after Control card detection failure, still,
To by-pass switch, only switching signal, not monitoring order issue situation to current Control card all the way, and it is disconnected that there are signal circuits
Line/poor contact causes bypass order of closing a floodgate to issue unsuccessful, and by-pass switch is caused not close a floodgate, may cause IGBT or it is anti-simultaneously
Connection diode breakdown or circuit open circuit cause direct current to stop transport.
Closing circuit originally only all the way, and without the monitoring circuit of circuit conducting, can not directly monitoring circuit be connected
Situation.
Summary of the invention
The technical problem to be solved by the invention is to provide one kind to prevent flexible direct current power module by-pass switch from refusing to close a floodgate
Circuit and method can lead to extremely the unsuccessful problem of by-pass switch combined floodgate because of signal circuit to avoid by-passing signal.
To solve the above-mentioned problems, the technical scheme adopted by the invention is that:
One kind prevents flexible direct current power module by-pass switch from refusing combined floodgate circuit, closes a floodgate locating for order just including being connected in parallel on bypass
The by-passing signal closing circuit of several redundancies between the corresponding negative potential of current potential, in which:
The by-passing signal closing circuit of each redundancy include with bypass close a floodgate resistance that order locating positive potential connect and
The closing circuit of resistance other end connection, the order connecting with the closing circuit other end issue monitoring device, are connected in parallel on resistance two
The voltage sampling apparatus at end, the other end connection bypass that order issues monitoring device, which is closed a floodgate, orders corresponding negative potential, voltage
Sampling apparatus and order issue monitoring device and are all connected with power module control system, and the bypass of power module control system, which is closed a floodgate, orders
It enables signal wire also be connected in parallel on resistance both ends, bypasses combined floodgate command signal line by by-pass switch and connect closing circuit.
Technical solution of the present invention further improvement lies in that: power module control system be Control card, order issue prison
Survey device is relay, and resistance is 15k Ω -25k Ω.
Technical solution of the present invention further improvement lies in that: voltage sampling apparatus be voltage sample chip or voltage sample electricity
Road.
Technical solution of the present invention further improvement lies in that: by-pass switch includes the locating positive potential of order that closes a floodgate with bypass
The diode D1 of connection, the other end of diode 1 are separately connected capacitor C1 and switch SA1-1, the capacitor C1 other end and switch
The SA1-1 other end is all connected with resistance R1, and the resistance R1 other end is separately connected diode D2, relay KM, capacitor C2, diode
D2, the relay KM other end draw outer contact, negative potential corresponding to capacitor C2 other end connection bypass combined floodgate order positive potential.
One kind prevents flexible direct current power module by-pass switch from refusing closing switch method, is realized by above-mentioned circuit, process are as follows:
The bypass of power module control system closes a floodgate order for lasting positive potential, when power module control system detects flexible direct current
Power module failure, it is each using the by-passing signal closing circuit of several redundancies when needing to bypass flexible direct current power module
It all installs redundant loop conducting monitoring circuit on the by-passing signal closing circuit of redundancy additional and order issues monitoring device, to say
The bright circuit normally and transmitting order to lower levels, for it is subsequent carry out circuit and monitor criterion is provided.
Technical solution of the present invention further improvement lies in that: it is characterized by: the number of the by-passing signal closing circuit of redundancy
Amount is at least two (such as closing circuit 1 and closing circuits 2), when a by-passing signal closing circuit breaks, this circuit
Voltage sampling apparatus will fall to 0 from positive negative potential, judge that circuit is interrupted, signal is sent to power module control system, power
Module control system issues combined floodgate order by an other closing circuit, then goes next to close a floodgate back if unsuccessful
Road, until order of closing a floodgate issues success, the order of the by-passing signal closing circuit at this time issues monitoring device and will act, by this time
Road Continuity signal is uploaded to power module control system, illustrates the circuit normally and transmitting order to lower levels, carries out circuit to be subsequent
Monitoring provides criterion.
By adopting the above-described technical solution, the beneficial effect that the present invention obtains is: the present apparatus can be in real time to a plurality of time
Road is monitored, and after circuit is interrupted, voltage sampling apparatus monitors that resistance both ends current potential is reduced to 0, is judged that circuit is interrupted, will be believed
It number is sent to power module control system, power module control system issues combined floodgate order by an other closing circuit, incite somebody to action this
Power module bypass, avoid bypassing it is unsuccessful cause whole circuit to open a way, in turn result in direct current trip accident.
Detailed description of the invention
Fig. 1 is the schematic diagram of the embodiment of the present invention；
Fig. 2 is by-pass switch secondary lead wires figure of the invention；
Fig. 3 is the composition schematic diagram of single flexible dc power module of the invention.
Specific embodiment
The present invention is described in further details below with reference to embodiment.
The invention discloses one kind to prevent flexible direct current power module by-pass switch from refusing combined floodgate circuit, referring to Fig. 1, including simultaneously
The by-passing signal for being associated in several redundancies between the corresponding negative potential of the locating positive potential of bypass combined floodgate order closes a floodgate back
Road, in which:
The by-passing signal closing circuit of each redundancy include with bypass close a floodgate resistance that order locating positive potential connect and
The closing circuit of resistance other end connection, the order connecting with the closing circuit other end issue monitoring device, are connected in parallel on resistance two
The voltage sampling apparatus at end, the other end connection bypass that order issues monitoring device, which is closed a floodgate, orders corresponding negative potential, voltage
Sampling apparatus and order issue monitoring device and are all connected with power module control system, and the bypass of power module control system, which is closed a floodgate, orders
It enables signal wire also be connected in parallel on resistance both ends, bypasses combined floodgate command signal line by by-pass switch and connect closing circuit.
Power module control system is Control card, and it is relay that order, which issues monitoring device, and resistance is 15k Ω-
25k Ω, such as 20k Ω.
Voltage sampling apparatus is voltage sample chip or voltage sampling circuit.
One kind prevents flexible direct current power module by-pass switch from refusing closing switch method, is realized by above-mentioned circuit, process are as follows:
The bypass of power module control system closes a floodgate order for lasting positive potential, when power module control system detects flexible direct current
Power module failure, it is each using the by-passing signal closing circuit of several redundancies when needing to bypass flexible direct current power module
It all installs redundant loop conducting monitoring circuit on the by-passing signal closing circuit of redundancy additional and order issues monitoring device, to say
The bright circuit normally and transmitting order to lower levels, for it is subsequent carry out circuit and monitor criterion is provided.
The quantity of the by-passing signal closing circuit of redundancy is at least two, when a by-passing signal closing circuit breaks,
The voltage sampling apparatus in this circuit will fall to 0 from positive negative potential, judge that circuit is interrupted, and signal is sent to power module control system
System, power module control system issue combined floodgate order by an other closing circuit, next are then gone if unsuccessful
Closing circuit, until order of closing a floodgate issues success, the order of the by-passing signal closing circuit at this time issues monitoring device and will act,
By this circuit, Continuity signal is uploaded to power module control system, illustrates the circuit normally and transmitting order to lower levels, does to be subsequent
Good circuit monitoring provides criterion
Such as the quantity of the by-passing signal closing circuit of redundancy is 2, respectively closing circuit 1 and closing circuit 2), work as combined floodgate
When circuit 1 is broken, the voltage sampling apparatus of this closing circuit 1 takes the voltage value of resistance 1 that will fall to 0 from positive negative potential, judgement
Closing circuit 1 interrupts, and signal is sent to power module control system, power module control system issues conjunction by closing circuit 2
Lock order then goes next closing circuit (being suitable for having three or more closing circuits at this time), until closing if unsuccessful
Lock order issues success, it is assumed that closing circuit 2 issues combined floodgate and orders successfully, and the order of the closing circuit 2 at this time issues monitoring dress
Setting 2 will act, and 2 Continuity signal of circuit is uploaded to power module control system, illustrates 2 normally of closing circuit and issues
Order, for it is subsequent carry out circuit monitor criterion is provided
Flexible direct current power module is referring to Fig. 3.
Referring to fig. 2, by-pass switch includes the diode D1 that the positive potential locating with bypass combined floodgate order is connect, diode 1
The other end be separately connected capacitor C1 and switch SA1-1, the capacitor C1 other end and the switch SA1-1 other end are all connected with resistance R1,
The resistance R1 other end is separately connected diode D2, relay KM, capacitor C2, and diode D2, the relay KM other end draw outer contact,
Negative potential corresponding to capacitor C2 other end connection bypass combined floodgate order positive potential.
It is to refer to close, carry and cut-off normal current and defined overload that the bypass that the present invention is applied to, which connects switch,
The switching device of electric current.Main function, by controlling its closure, is reached in module itself fail in power module
Malfunctioning module is cut off in system, while the purpose of a new current flow paths being provided.Technical parameter such as following table 2.4.1.
Table: 2.4.1 by-pass switch technical parameter
| Parameter | Numerical value | Parameter | Numerical value |
| Rated operational voltage Ue | 2500V | Rated operational current Ie | 1250A |
| Maximum closing time | ≤5ms | State feedback time | ≤20ms |
| Separating brake mode | Manual mode | Hold mode | Self-sustaining (permanent magnetism) |
By-pass switch receive close a floodgate order after, can by auxiliary contact feed back "on" position, informing system be closing success or
It closes a floodgate and fails.When some failures have occurred in unit, unit issues bypass request to host computer, if host computer decision executes side
Road then issues by-passing signal to unit master control borad, if unit master control borad can change delay in 20ms() interior do not receive bypass
Contactor auxiliary contact feedback signal, then be considered as bypass failure.When occurring to bypass failure, unit does not report bypass to request, only
It uploads malfunction and gives valve control.
Claims (6)
1. one kind prevents flexible direct current power module by-pass switch from refusing combined floodgate circuit, it is characterised in that: closed including being connected in parallel on bypass
The by-passing signal closing circuit of several redundancies between the corresponding negative potential of positive potential locating for lock order, in which:
The by-passing signal closing circuit of each redundancy include with bypass close a floodgate resistance that order locating positive potential connect and
The closing circuit of resistance other end connection, the order connecting with the closing circuit other end issue monitoring device, are connected in parallel on resistance two
The voltage sampling apparatus at end, the other end connection bypass that order issues monitoring device, which is closed a floodgate, orders corresponding negative potential, voltage
Sampling apparatus and order issue monitoring device and are all connected with power module control system, and the bypass of power module control system, which is closed a floodgate, orders
Signal wire is enabled also to be connected in parallel on resistance both ends.
2. one kind according to claim 1 prevents flexible direct current power module by-pass switch from refusing combined floodgate circuit, feature exists
In: power module control system is Control card, and it is relay that order, which issues monitoring device, and resistance is 15k Ω -25k Ω.
3. one kind according to claim 2 prevents flexible direct current power module by-pass switch from refusing combined floodgate circuit, feature exists
In: voltage sampling apparatus is voltage sample chip or voltage sampling circuit.
4. one kind according to claim 3 prevents flexible direct current power module by-pass switch from refusing combined floodgate circuit, feature exists
In: by-pass switch includes the diode D1 that the positive potential locating with bypass combined floodgate order is connect, and the other end of diode 1 connects respectively
Capacitor C1 and switch SA1-1 are met, the capacitor C1 other end and the switch SA1-1 other end are all connected with resistance R1, the resistance R1 other end point
Not Lian Jie diode D2, relay KM, capacitor C2, diode D2, the relay KM other end draw outer contact, and the capacitor C2 other end connects
Connect negative potential corresponding to bypass combined floodgate order positive potential.
5. one kind prevents flexible direct current power module by-pass switch from refusing closing switch method, which is characterized in that by described in claim 1
Circuit realize, process are as follows: the bypass of power module control system order of closing a floodgate is lasting positive potential, when power module control
System detection is to flexible direct current power module failure, when needing to bypass flexible direct current power module, using the side of several redundancies
Road signal closing circuit all installs redundant loop conducting monitoring circuit and life on the by-passing signal closing circuit of each redundancy additional
Order issues monitoring device, to illustrate the circuit normally and transmitting order to lower levels, for it is subsequent carry out circuit and monitor criterion is provided.
6. one kind according to claim 5 prevents flexible direct current power module by-pass switch from refusing closing switch method, feature exists
In: the quantity of the by-passing signal closing circuit of redundancy is at least two, when a by-passing signal closing circuit breaks, this circuit
Voltage sampling apparatus will fall to 0 from positive negative potential, judge circuit interrupt, signal is sent to power module control system, function
Rate module control system issues combined floodgate order by an other closing circuit, then goes next to close a floodgate back if unsuccessful
Road, until order of closing a floodgate issues success, the order of the by-passing signal closing circuit at this time issues monitoring device and will act, by this time
Road Continuity signal is uploaded to power module control system, illustrates the circuit normally and transmitting order to lower levels, carries out circuit to be subsequent
Monitoring provides criterion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910513831.1A CN110137902B (en) | 2019-06-14 | 2019-06-14 | Circuit and method for preventing bypass switch of flexible direct current power module from closing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910513831.1A CN110137902B (en) | 2019-06-14 | 2019-06-14 | Circuit and method for preventing bypass switch of flexible direct current power module from closing |
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| Publication Number | Publication Date |
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| CN110137902A true CN110137902A (en) | 2019-08-16 |
| CN110137902B CN110137902B (en) | 2020-06-23 |
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| CN201910513831.1A Active CN110137902B (en) | 2019-06-14 | 2019-06-14 | Circuit and method for preventing bypass switch of flexible direct current power module from closing |
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Cited By (4)
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| CN110783893A (en) * | 2019-11-14 | 2020-02-11 | 中国南方电网有限责任公司超高压输电公司天生桥局 | Overvoltage protection method for flexible direct current power module |
| CN111313371A (en) * | 2020-03-04 | 2020-06-19 | 南京南瑞继保工程技术有限公司 | Bypass protection method for cascade power module |
| CN112858896A (en) * | 2021-01-06 | 2021-05-28 | 南方电网科学研究院有限责任公司 | Flexible direct current converter valve power module bypass switch error-closing test method and device |
| CN112858897A (en) * | 2021-01-06 | 2021-05-28 | 南方电网科学研究院有限责任公司 | Flexible direct current converter valve power module bypass switch through-flow test method and device |
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| CN110783893B (en) * | 2019-11-14 | 2021-10-19 | 中国南方电网有限责任公司超高压输电公司天生桥局 | Overvoltage protection method for flexible direct current power module |
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| CN112858896A (en) * | 2021-01-06 | 2021-05-28 | 南方电网科学研究院有限责任公司 | Flexible direct current converter valve power module bypass switch error-closing test method and device |
| CN112858897A (en) * | 2021-01-06 | 2021-05-28 | 南方电网科学研究院有限责任公司 | Flexible direct current converter valve power module bypass switch through-flow test method and device |
| CN112858897B (en) * | 2021-01-06 | 2022-02-22 | 南方电网科学研究院有限责任公司 | Flexible direct current converter valve power module bypass switch through-flow test method and device |
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