CN205160034U

CN205160034U - Take high voltage direct current circuit breaker of coupling reactance ware

Info

Publication number: CN205160034U
Application number: CN201520907855.2U
Authority: CN
Inventors: 袁召; 何俊佳; 潘垣; 徐惠; 赵文婷; 尹小根
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2015-11-14
Filing date: 2015-11-14
Publication date: 2016-04-13
Anticipated expiration: 2025-11-14

Abstract

The utility model discloses a take high voltage direct current circuit breaker of coupling reactance ware, including the breaker module of a n series connection, with a n breaker module parallel connection's energy -absorbing voltage limiting module and trigger module, the breaker module include mechanical switch and with mechanical switch parallel connection's change of current branch road, change of current branch road includes the charge change of current module and the change of current electric capacity of series connection in proper order, the change of current module of charging is used for charging and producing high frequency reverse current for change of current electric capacity making mechanical switch realize cut -offfing, energy -absorbing voltage limiting module is arranged in absorbing fault current and is realized the voltage limiting protection to mechanical switch by the energy of the perceptual component of electric power system storage after being cut off, trigger module and the individual change of current module parallel connection that charges of n to it makes it switch on after the trouble to be used for controlling the individual change of current module of charging of n. The utility model provides a force zero passage type high voltage direct current circuit breaker, can realize the two -way of fault current and cut -off, simple structure, control is convenient, fast, the reliability is high.

Description

A kind of high voltage DC breaker with mutual reactor

Technical field

The utility model belongs to high voltage DC breaker field, more specifically, relates to a kind of high voltage DC breaker with mutual reactor.

Background technology

Direct current transportation mode is the power transmission mode occurred in history the earliest, but owing to failing to solve the key technology such as change in voltage, thus very soon replace by UHV AC transmission technique.But in recent years along with the progress of the development of electric power system and the needs of special technology of transmission of electricity and high-power electric and electronic technology, high voltage direct current transmission have been got back attention and application development with the advantage of its uniqueness.Compared with ac transmission, high voltage direct current transmission has track cost economy, two end systems without the need to the advantage such as stable operation, power adjustments be simple, is particularly suitable for superhigh pressure, Large Copacity, long distance power transmission.

At present, the HVDC engineering put into operation in the world has more than 90, and total capacity is more than 70000MW.But the HVDC (High Voltage Direct Current) transmission system run in the world is branchiess two-port, reason is do not have operational high voltage DC breaker.This defect not only limit the performance of high voltage direct current transmission superiority, also governs foundation and the development of multiterminal element electrical network.

When be short-circuited fault time, the Low ESR of direct current system causes short circuit current to rise rapidly, therefore must ensure that DC circuit breaker reliably excises short trouble within the time short as far as possible.Meanwhile, because DC circuit breaker needs to bear higher transient recovery voltage during drop-out current, must ensure that main switch branch road meets higher requirement of withstand voltage.

Current DC circuit breaker is mainly divided into three types: mechanical type DC circuit breaker, all solid state formula DC circuit breaker, hybrid DC circuit breaker in conjunction with mechanical switch and solid-state switch.But the DC circuit breaker being applicable to high pressure field only has two schemes at present: first, force zero-based machinery DC circuit breaker, the reverse high frequency oscillating current produced by recharged capacitance and inductance superposes to produce " artificial current zero " with direct fault current in mechanical switch, thus extinguish arcs, breaking direct current; The second, the use mechanical isolation fracture proposed primarily of companies such as ABB and the mixed type DC circuit breaker of solid-state switch.For the first scheme, reverse zero passage loop structure is complicated, if need two-way cut-offfing and the function such as reclosing, drop into too high, volume is large, controls complexity and significantly improves.Hybrid high voltage DC breaker, adopts IGBT and lightning arrester to compose in parallel another bypass, needs series-parallel IGBT quantity too many, structure, control, poor reliability, expensive and bulky.

Utility model content

For above defect or the Improvement requirement of prior art, the purpose of this utility model is to provide a kind of high voltage DC breaker with mutual reactor, high voltage DC breaker itself is swift in motion, cut-offs big current and bears on high-tension basis meeting direct current system, solve existing high voltage DC breaker and cannot carry out two-way problem of cut-offfing, when cut-offfing high-voltage large current, reduce trigger module quantity, circuit breaker cost is significantly reduced, reduces the requirement to charge power supply simultaneously.

The utility model provides a kind of high voltage DC breaker with mutual reactor, comprises n the breaker module be connected in series, the energy-absorbing pressure limiting module be connected in parallel with n breaker module and trigger module; The change of current branch road that described breaker module comprises mechanical switch and is connected in parallel with described mechanical switch; Described change of current branch road comprises the charging change of current module and commutation capacitor that are sequentially connected in series; Described charging change of current module is used for charging to described commutation capacitor and produces high frequency reverse current and makes described mechanical switch realize cut-offfing; Described energy-absorbing pressure limiting module is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch; Described trigger module is connected with n described charging change of current wired in parallel, and makes its conducting after a failure for control n described charging change of current module; N be more than or equal to 1 positive integer.

The utility model additionally provides a kind of high voltage DC breaker with mutual reactor, comprise n the mechanical switch be connected in series, the energy-absorbing pressure limiting module be connected in parallel with n mechanical switch, trigger module and the change of current branch road be connected in parallel with n mechanical switch; Described change of current branch road comprises the charging change of current module and commutation capacitor that are sequentially connected in series; Described charging change of current module is used for charging to described commutation capacitor and produces high frequency reverse current and makes described mechanical switch realize cut-offfing; Described energy-absorbing pressure limiting module is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch; Described trigger module is connected with described charging change of current wired in parallel, and makes its conducting after a failure for controlling described charging change of current module; N be more than or equal to 1 positive integer.

The utility model additionally provides a kind of high voltage DC breaker with mutual reactor, comprises n the breaker module be connected in series, n the energy-absorbing pressure limiting module and trigger module be connected in parallel with n breaker module respectively; The change of current branch road that described breaker module comprises mechanical switch and is connected in parallel with described mechanical switch; Described change of current branch road comprises the charging change of current module and commutation capacitor that are sequentially connected in series; Described charging change of current module is used for charging to described commutation capacitor and produces high frequency reverse current and makes described mechanical switch realize cut-offfing; Described energy-absorbing pressure limiting module is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch; Described trigger module is connected with n described charging change of current wired in parallel, and makes its conducting after a failure for control n described charging change of current module; N be more than or equal to 1 positive integer.

The utility model additionally provides a kind of high voltage DC breaker with mutual reactor, comprise n the mechanical switch be connected in series, the energy-absorbing pressure limiting module that n is connected in parallel with n mechanical switch respectively, trigger module, and the change of current branch road be connected in parallel with n mechanical switch; Described change of current branch road comprises the charging change of current module and commutation capacitor that are sequentially connected in series; Described charging change of current module is used for charging to described commutation capacitor and produces high frequency reverse current and makes described mechanical switch realize cut-offfing; Described energy-absorbing pressure limiting module is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch; Described trigger module is connected with described charging change of current wired in parallel, and makes its conducting after a failure for controlling described charging change of current module; N be more than or equal to 1 positive integer.

Further, described charging change of current module comprises mutual reactor, the coupling capacitance C2 be connected in series with one end of described mutual reactor primary side and the freewheeling circuit be connected in parallel with described coupling capacitance C2; Described mutual reactor secondary side is used for being connected in series with described commutation capacitor; The other end of described mutual reactor primary side is used for being connected in parallel with described trigger module.

Further, freewheeling circuit comprises the resistance R1 and diode D1 that are sequentially connected in series.

The utility model additionally provides a kind of high voltage DC breaker with mutual reactor, the energy-absorbing pressure limiting module, a forward trigger module and the reverse trigger module that comprise breaker module that n is connected in series, be connected in parallel with n breaker module; The change of current branch road that each breaker module comprises mechanical switch and is connected in parallel with described mechanical switch; Described change of current branch road comprises the positive charge change of current module, commutation capacitor and the reverse charging change of current module that are sequentially connected in series; Described positive charge change of current module is used for producing reverse current by mutual reactor at change of current branch road after forward fault occurs makes mechanical switch cross zero breaking, and described reverse charging change of current module is used for producing reverse current by mutual reactor at change of current branch road after reverse fault occurs makes mechanical switch cross zero breaking; Described energy-absorbing pressure limiting module is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch; Described forward trigger module is connected with the described positive charge change of current wired in parallel in n breaker module respectively, for positive charge change of current module described in conducting during forward fault; Described reverse trigger module is connected with the described reverse charging change of current wired in parallel in n breaker module respectively, for reverse charging change of current module described in conducting during reverse fault; N be more than or equal to 1 positive integer.

The utility model additionally provides a kind of high voltage DC breaker with mutual reactor, comprise n the mechanical switch be connected in series, the energy-absorbing pressure limiting module be connected in parallel with n mechanical switch, the change of current branch road be connected in parallel with n mechanical switch, a forward trigger module and a reverse trigger module; Described change of current branch road comprises the positive charge change of current module, commutation capacitor and the reverse charging change of current module that are sequentially connected in series; Described positive charge change of current module is used for producing reverse current by mutual reactor at change of current branch road after forward fault occurs makes mechanical switch cross zero breaking, and described reverse charging change of current module is used for producing reverse current by mutual reactor at change of current branch road after reverse fault occurs makes mechanical switch cross zero breaking; Described energy-absorbing pressure limiting module is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch; Described forward trigger module is connected with described positive charge change of current wired in parallel, for positive charge change of current module described in conducting during forward fault; Described reverse trigger module is connected with described reverse charging change of current wired in parallel, for conducting reverse charging change of current module during reverse fault; N be more than or equal to 1 positive integer.

The utility model additionally provides a kind of high voltage DC breaker with mutual reactor, comprises n the breaker module be connected in series, individual energy-absorbing pressure limiting module, a forward trigger module and the reverse trigger module be connected in parallel with n breaker module respectively of n; The change of current branch road that each breaker module comprises mechanical switch and is connected in parallel with described mechanical switch; Described change of current branch road comprises the positive charge change of current module, commutation capacitor and the reverse charging change of current module that are sequentially connected in series; Described positive charge change of current module is used for producing reverse current by mutual reactor at change of current branch road after forward fault occurs makes mechanical switch cross zero breaking, and described reverse charging change of current module is used for producing reverse current by mutual reactor at change of current branch road after reverse fault occurs makes mechanical switch cross zero breaking; Described energy-absorbing pressure limiting module is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch; Described forward trigger module is connected with the described positive charge change of current wired in parallel in n breaker module respectively, for positive charge change of current module described in conducting during forward fault; Described reverse trigger module is connected with the described reverse charging change of current wired in parallel in n breaker module respectively, for reverse charging change of current module described in conducting during reverse fault; N be more than or equal to 1 positive integer.

The utility model additionally provides a kind of high voltage DC breaker with mutual reactor, comprise n the mechanical switch be connected in series, n the energy-absorbing pressure limiting module be connected in parallel with n mechanical switch respectively, the change of current branch road be connected in parallel with n mechanical switch, a forward trigger module and a reverse trigger module; Described change of current branch road comprises the positive charge change of current module, commutation capacitor and the reverse charging change of current module that are sequentially connected in series; Described positive charge change of current module is used for producing reverse current by mutual reactor at change of current branch road after forward fault occurs makes mechanical switch cross zero breaking, and described reverse charging change of current module is used for producing reverse current by mutual reactor at change of current branch road after reverse fault occurs makes mechanical switch cross zero breaking; Described energy-absorbing pressure limiting module is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch; Described forward trigger module is connected with described positive charge change of current wired in parallel, for positive charge change of current module described in conducting during forward fault; Described reverse trigger module is connected with described reverse charging change of current wired in parallel, for conducting reverse charging change of current module during reverse fault; N be more than or equal to 1 positive integer.

The utility model additionally provides a kind of high voltage DC breaker with mutual reactor, it is characterized in that, the energy-absorbing pressure limiting module, a forward trigger module and the reverse trigger module that comprise breaker module that n is connected in series, be connected in parallel with n breaker module; The change of current branch road that described breaker module comprises mechanical switch and is connected in parallel with described mechanical switch; The reverse charging change of current module that described change of current branch road comprises the positive charge change of current module that is sequentially connected in series and commutation capacitor and is connected with described positive charge change of current wired in parallel; Described positive charge change of current module is used for producing reverse current by mutual reactor at change of current branch road after forward fault occurs makes mechanical switch cross zero breaking, and described reverse charging change of current module is used for producing reverse current by mutual reactor at change of current branch road after reverse fault occurs makes mechanical switch cross zero breaking; Described energy-absorbing pressure limiting module is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch; Described forward trigger module is for positive charge change of current module described in conducting during forward fault; Described reverse trigger module is for reverse charging change of current module described in conducting during reverse fault; N be more than or equal to 1 positive integer.

The utility model additionally provides a kind of high voltage DC breaker with mutual reactor, comprise n the mechanical switch be connected in series, the energy-absorbing pressure limiting module be connected in parallel with n mechanical switch, the change of current branch road be connected in parallel with n mechanical switch, a forward trigger module and a reverse trigger module; The reverse charging change of current module that described change of current branch road comprises the positive charge change of current module that is connected in series and commutation capacitor and is connected with described positive charge change of current wired in parallel; Described positive charge change of current module is used for producing reverse current by mutual reactor at change of current branch road after forward fault occurs makes mechanical switch cross zero breaking, and described reverse charging change of current module is used for producing reverse current by mutual reactor at change of current branch road after reverse fault occurs makes mechanical switch cross zero breaking; Described energy-absorbing pressure limiting module is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch; Described forward trigger module is for positive charge change of current module described in conducting during forward fault; Described reverse trigger module is for reverse charging change of current module described in conducting during reverse fault; N be more than or equal to 1 positive integer.

The utility model additionally provides a kind of high voltage DC breaker with mutual reactor, comprises n the breaker module be connected in series, individual energy-absorbing pressure limiting module, a forward trigger module and the reverse trigger module be connected in parallel with n breaker module respectively of n; The change of current branch road that described breaker module comprises mechanical switch and is connected in parallel with described mechanical switch; The reverse charging change of current module that described change of current branch road comprises the positive charge change of current module that is sequentially connected in series and commutation capacitor and is connected with described positive charge change of current wired in parallel; Described positive charge change of current module is used for producing reverse current by mutual reactor at change of current branch road after forward fault occurs makes mechanical switch cross zero breaking, and described reverse charging change of current module is used for producing reverse current by mutual reactor at change of current branch road after reverse fault occurs makes mechanical switch cross zero breaking; Described energy-absorbing pressure limiting module is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch; Described forward trigger module is for positive charge change of current module described in conducting during forward fault; Described reverse trigger module is for reverse charging change of current module described in conducting during reverse fault; N be more than or equal to 1 positive integer.

The utility model additionally provides a kind of high voltage DC breaker with mutual reactor, comprise n the mechanical switch be connected in series, n the energy-absorbing pressure limiting module be connected in parallel with n mechanical switch respectively, the change of current branch road be connected in parallel with n mechanical switch, a forward trigger module and a reverse trigger module; The reverse charging change of current module that described change of current branch road comprises the positive charge change of current module that is connected in series and commutation capacitor and is connected with described positive charge change of current wired in parallel; Described positive charge change of current module is used for producing reverse current by mutual reactor at change of current branch road after forward fault occurs makes mechanical switch cross zero breaking, and described reverse charging change of current module is used for producing reverse current by mutual reactor at change of current branch road after reverse fault occurs makes mechanical switch cross zero breaking; Described energy-absorbing pressure limiting module is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch; Described forward trigger module is for positive charge change of current module described in conducting during forward fault; Described reverse trigger module is for reverse charging change of current module described in conducting during reverse fault; N be more than or equal to 1 positive integer.

Further, described positive charge change of current module comprises mutual reactor, coupling capacitance C2 and the freewheeling circuit be connected in parallel with described coupling capacitance C2; The secondary side of described mutual reactor is used for being connected in series with described commutation capacitor; One end of the primary side of described mutual reactor is by described coupling capacitance C2 ground connection, and the other end of the primary side of described mutual reactor is used for described forward trigger module in parallel; Described freewheeling circuit comprises the diode and resistance that are sequentially connected in series; The positive pole of described diode is connected with described coupling capacitance C2, and the negative pole of described diode is connected with described resistance R1.

Further, described reverse charging change of current module comprises mutual reactor, coupling capacitance C2 and the freewheeling circuit be connected in parallel with described coupling capacitance C2; The secondary side of described mutual reactor is used for being connected in series with described commutation capacitor; One end of the primary side of described mutual reactor is by described coupling capacitance C2 ground connection, and the other end of the primary side of described mutual reactor is used for being connected in parallel described reverse trigger module; Described freewheeling circuit comprises the diode and resistance that are sequentially connected in series; The negative pole of described diode is connected with described coupling capacitance C2, and the positive pole of described diode is connected with described resistance R1.

A kind of high voltage DC breaker with mutual reactor that the utility model provides, comprises the breaker module of n series connection, energy-absorbing pressure limiting module in parallel with it and trigger switch; N be not less than 1 integer; Described breaker module comprises the mechanical switch, the change of current branch road that are connected in parallel; Described change of current branch road comprises the charging change of current module and commutation capacitor that are connected in series; Described charging change of current module comprises the mutual reactor that secondary side is connected with described change of current branch road, coupling capacitance, the freewheeling circuit in parallel with described coupling capacitance of connecting with described mutual reactor primary side; Described charging change of current module provides reverse current to superpose on circuit breaker branch road and forms current zero when in forward fault; Produce reverse high frequency oscillating current for mechanical switch when reverse fault together with commutation capacitor for the charging of described commutation capacitor current zero is provided; Described trigger switch triggers the conducting of charging change of current module after being used for detection failure.

For ensureing the better modularization of high voltage DC breaker, the utility model provides the second band mutual reactor high voltage DC breaker type of attachment, comprises the breaker module of n series connection, energy-absorbing pressure limiting module in parallel with it and trigger switch; N be not less than 1 integer; Described breaker module comprises the mechanical switch and change of current branch road that are connected in parallel; Described change of current branch road comprises the positive charge change of current module, reverse charging change of current module and the commutation capacitor that are connected in series; Described positive charge change of current module comprises the mutual reactor that secondary side is connected with described change of current branch road, coupling capacitance, the freewheeling circuit in parallel with described coupling capacitance of connecting with described mutual reactor primary side; Described reverse charging change of current module comprises the mutual reactor that secondary side is connected with change of current branch road, with coupling capacitance, the freewheeling circuit in parallel with described coupling capacitance of the forward precharge that described mutual reactor is connected; Described freewheeling circuit comprises diode and the resistance of series connection; Described positive charge change of current module produces reverse current by described mutual reactor at the described change of current branch road when being used for forward current fault makes circuit breaker cross zero breaking; Described reverse charging change of current module produces reverse current by described mutual reactor at the described change of current branch road when being used for reverse current fault makes circuit breaker cross zero breaking; Described trigger switch triggers the conducting of charging change of current module after being used for detection failure.

For ensureing the better modularization of high voltage DC breaker, the utility model provides the high voltage DC breaker type of attachment of the third band mutual reactor, comprises the breaker module of n series connection, energy-absorbing pressure limiting module in parallel with it and trigger switch; N be not less than 1 integer; Described breaker module comprises the mechanical switch and change of current branch road that are connected in parallel; Described change of current branch road comprises the two-way charging change of current module and commutation capacitor that are connected in series; Described two-way charging change of current module comprises the positive charge change of current module and reverse charging change of current module that are connected in parallel; Described positive charge change of current module comprises the forward mutual reactor that secondary side is connected with described change of current branch road, coupling capacitance, the freewheeling circuit in parallel with described coupling capacitance of connecting with described forward mutual reactor primary side; Described reverse charging change of current module comprises the reverse coupled reactor that secondary side is connected with change of current branch road, the trigger switch of connecting with described reverse coupled reactor and the coupling capacitance of forward precharge, the freewheeling circuit in parallel with described coupling capacitance; Described freewheeling circuit comprises diode and the resistance of series connection; Described positive charge change of current module produces reverse current when being used for forward current fault makes the current over-zero of breaker module cut-off; Described reverse charging change of current module produces reverse current by described mutual reactor at the described change of current branch road when being used for reverse current fault makes circuit breaker cross zero breaking; Described trigger switch triggers the conducting of charging change of current module after being used for detection failure.

Wherein, operation principle when short trouble appears in system is as follows:

When failures are detected, line current rises, through certain time-delay, described mechanical switch separating brake, when separating brake is to when effectively opening distance, described trigger switch conducting, described coupling capacitance is made to start electric discharge, when being forward fault, described coupling capacitance produces a reverse current by mutual reactor at described change of current branch road, and breaker module current over-zero is cut-off; When being reverse fault, described coupling capacitance is charged to described commutation capacitor by described mutual reactor, described commutation capacitor and described mutual reactor secondary side produce the higher-order of oscillation, make described mechanical switch both end voltage zero passage, and described mechanical switch blow-out realizes cut-offfing.Along with electric current constantly injects described change of current branch road, described mechanical switch end fracture voltage constantly rises, and when voltage reaches described energy-absorbing pressure limiting module action voltage, current transfer, to energy-absorbing pressure limiting branch road, consumes the energy stored in system.Realize cut-offfing completely of fault.

The utility model, by the series connection of many group modules, can meet the requirement of different electric pressure flexibly.A kind of high voltage DC breaker with mutual reactor that the utility model provides, high voltage DC breaker itself is swift in motion, cut-offs big current and bears on high-tension basis meeting direct current system, by coupling branch road to change of current capacitor charging, cut-offfing of big current can be realized and cut-off with the two-way of electric current; Change of current branch road adopts buffer capacitor to replace the power electronic device of a large amount of series connection, and device is single and without the need to all pressing strategy, solve the problem of poor reliability; Simultaneously when line voltage distribution grade raises, when needing multiple charging change of current module, due to the topological property of charging change of current module, multiple charging change of current module shares a triggered gap, decreases the quantity of triggered gap during multimode, greatly reduces the cost of circuit breaker.

Accompanying drawing explanation

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Fig. 1 provides for the utility model first embodiment;

The mixed high-voltage DC circuit breaker of the band mutual reactor that Fig. 2 provides for the utility model second embodiment theory diagram;

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Fig. 3 provides for the utility model the 3rd embodiment;

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Fig. 4 provides for the utility model the 4th embodiment;

The change of current branch road of the mixed high-voltage DC circuit breaker of the band mutual reactor that Fig. 5 provides for the utility model embodiment and trigger switch topological structure schematic diagram;

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Fig. 6 provides for the utility model the 5th embodiment;

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Fig. 7 provides for the utility model the 6th embodiment;

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Fig. 8 provides for the utility model the 7th embodiment;

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Fig. 9 provides for the utility model the 8th embodiment;

The change of current branch road of the mixed high-voltage DC circuit breaker of the band mutual reactor that Figure 10 provides for the utility model embodiment and trigger switch topological structure schematic diagram;

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Figure 11 provides for the utility model the 9th embodiment;

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Figure 12 provides for the utility model the tenth embodiment;

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Figure 13 provides for the utility model the 11 embodiment;

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Figure 14 provides for the utility model the 12 embodiment;

Change of current branch road in the mixed high-voltage DC circuit breaker of the band mutual reactor that Figure 15 provides for the utility model embodiment and trigger switch topological structure schematic diagram;

Trigger switch topological structure schematic diagram in the mixed high-voltage DC circuit breaker of the band mutual reactor that Figure 16 provides for the utility model embodiment.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.In addition, if below in described each execution mode of the utility model involved technical characteristic do not form conflict each other and just can mutually combine.

Fig. 1 shows the theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model first embodiment provides, and for convenience of explanation, illustrate only the part relevant to the utility model first embodiment, details are as follows:

Mixed high-voltage DC circuit breaker with mutual reactor comprises n the circuit breaker 1 be connected in series, the energy-absorbing pressure limiting module 2 in parallel with each circuit breaker and the trigger module 3 with charging change of current wired in parallel; N be not less than 1 integer; Breaker module 1 comprises the mechanical switch 11 and change of current branch road 12 that are connected in parallel; Change of current branch road 12 comprises the charging change of current module 120 and commutation capacitor 122 that are sequentially connected in series; Charging change of current module 120 in change of current branch road 12 for making circuit breaker 1 blow-out cut-off with commutation capacitor 122 acting in conjunction after fault occurs; Commutation capacitor 122 is used for and the mutual reactor secondary side charged in change of current module 120 together produces high frequency oscillating current and makes mechanical switch blow-out.Trigger module 3 can be trigger switch, for triggering the conducting of charging change of current module 12 when an error occurs.Energy-absorbing pressure limiting module 2 can be zinc oxide arrester, is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch 11.

The mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model first embodiment provides is connected by multimode can cut-off larger electric current.Simultaneously, realize multiple charging change of current module primary side by mutual reactor and share a trigger switch, trigger multiple charging change of current module by single trigger switch simultaneously, greatly reduce the number of trigger switch in multimode circuit breaker, save cost, also made control more simple.In addition, the circuit breaker that is applied as of change of current module of charging provides two-way function of cut-offfing.

Fig. 2 shows the theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model second embodiment provides, and for convenience of explanation, illustrate only the part relevant to the utility model first embodiment, details are as follows:

Mixed high-voltage DC circuit breaker with mutual reactor comprises n the mechanical switch 11 be connected in series and energy-absorbing pressure limiting module 2 in parallel with it, the change of current branch road 12 be connected in parallel with n mechanical switch 11, and trigger module 3; N be not less than 1 integer; Wherein change of current branch road 12 comprises the charging change of current module 120 and commutation capacitor 122 that are sequentially connected in series; Charging change of current module 120 in change of current branch road 12 for making circuit breaker 11 blow-out cut-off with commutation capacitor 122 acting in conjunction after fault occurs; Commutation capacitor 122 is used for and the mutual reactor secondary side charged in change of current module 121 together produces high frequency oscillating current and makes mechanical switch blow-out.Trigger module 3 is connected with the trigger control end of charging change of current module 120, and trigger module 3 can be trigger switch, for triggering the conducting of charging change of current module 12 when an error occurs.Energy-absorbing pressure limiting module 2 can be zinc oxide arrester, is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch 11.

The multiple mechanical switch of mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model second embodiment provides shares a change of current branch road, the quantity of change of current branch road can be reduced when voltage is not very high by this mode, make circuit structure more simple.In addition, the circuit breaker that is applied as of change of current module of charging provides two-way function of cut-offfing.

Fig. 3 shows the theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 3rd embodiment provides, and for convenience of explanation, illustrate only the part relevant to the utility model the 3rd embodiment, details are as follows:

Mixed high-voltage DC circuit breaker with mutual reactor comprises circuit breaker 1 that n is connected in series, a n energy-absorbing pressure limiting module 2 in parallel with circuit breaker and to charge the trigger module 3 of change of current wired in parallel with n circuit breaker; N be not less than 1 integer; Breaker module 1 comprises the mechanical switch 11 and change of current branch road 12 that are connected in parallel; Change of current branch road 12 comprises the charging change of current module 120 and commutation capacitor 122 that are sequentially connected in series; Charging change of current module 120 in change of current branch road 12 for making circuit breaker 11 blow-out cut-off with commutation capacitor 122 acting in conjunction after fault occurs; Commutation capacitor 122 is used for and the mutual reactor secondary side charged in change of current module 120 together produces high frequency oscillating current and makes mechanical switch blow-out.Trigger module 3 can be trigger switch, for triggering the conducting of charging change of current module 12 when an error occurs.Energy-absorbing pressure limiting module 2 can be zinc oxide arrester, is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch 11.

The mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 3rd embodiment provides is connected by multimode can cut-off larger electric current.Simultaneously, realize multiple charging change of current module primary side by mutual reactor and share a trigger switch, trigger multiple charging change of current module by single trigger switch simultaneously, greatly reduce the number of trigger switch in multimode circuit breaker, save cost, also made control more simple.In addition, the circuit breaker that is applied as of change of current module of charging provides two-way function of cut-offfing.

Fig. 4 shows the theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 4th embodiment provides, and for convenience of explanation, illustrate only the part relevant to the utility model the 4th embodiment, details are as follows:

Mixed high-voltage DC circuit breaker with mutual reactor comprises n the mechanical switch 11 be connected in series, the energy-absorbing pressure limiting module 2 in parallel with each mechanical switch, the change of current branch road 12 be connected in parallel with n mechanical switch 11, and trigger module 3; N be not less than 1 integer; Wherein change of current branch road 12 comprises the charging change of current module 120 and commutation capacitor 122 that are sequentially connected in series; Charging change of current module 120 in change of current branch road 12 for making circuit breaker 11 blow-out cut-off with commutation capacitor 122 acting in conjunction after fault occurs; Commutation capacitor 122 is used for and the mutual reactor secondary side charged in change of current module 121 together produces high frequency oscillating current and makes mechanical switch blow-out.Trigger module 3 is connected in parallel with charging change of current module 120, and trigger module 3 can be trigger switch, for triggering the conducting of charging change of current module 12 when an error occurs.Energy-absorbing pressure limiting module 2 can be zinc oxide arrester, is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch 11.

The multiple mechanical switch of mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 4th embodiment provides shares a change of current branch road, the quantity of change of current branch road can be reduced when voltage is not very high by this mode, make circuit structure more simple.In addition, the circuit breaker that is applied as of change of current module of charging provides two-way function of cut-offfing.

Fig. 5 shows change of current branch road and the trigger switch topological structure of the mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model embodiment provides, and for convenience of explanation, illustrate only the part relevant to the utility model first embodiment, details are as follows:

Charging change of current module 120 is connected with commutation capacitor 122; Charging change of current module 120 comprises mutual reactor, the coupling capacitance C2 connected with mutual reactor primary side, the freewheeling circuit in parallel with coupling capacitance C2 that secondary side is connected with commutation capacitor; Freewheeling circuit is resistance R1 and the diode D1 of series connection, for limiting the voltage direction at coupling capacitance two ends, prevents coupling capacitance reverse charging; Trigger module 3 is connected with mutual reactor primary side.

When an error occurs, line current rises, through certain time-delay, mechanical switch separating brake, when separating brake is to when effectively opening distance, trigger switch conducting, coupling capacitance starts electric discharge, if forward fault, coupling capacitance produces reverse current by mutual reactor in change of current branch road, and this reverse current is superimposed upon on mechanical switch and makes switch OFF; If reverse fault, coupling capacitance is charged to commutation capacitor by mutual reactor, and commutation capacitor and mutual reactor secondary side produce the higher-order of oscillation, makes mechanical switch both end voltage zero passage, and mechanical switch blow-out realizes cut-offfing.Along with electric current constantly injects change of current branch road, mechanical switch end fracture voltage constantly rises, and when voltage reaches energy-absorbing pressure limiting module action voltage, current transfer, to energy-absorbing pressure limiting branch road, consumes the energy stored in system.Realize cut-offfing completely of fault.

Fig. 6 shows the theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 5th embodiment provides; For convenience of explanation, illustrate only the part relevant to the utility model embodiment, details are as follows:

Mixed high-voltage DC circuit breaker with mutual reactor comprises n the breaker module 1 be connected in series, 1 the energy-absorbing pressure limiting module 2 in parallel with each breaker module 1, forward trigger module 31 and reverse trigger module 32; N be not less than 1 integer; Wherein, each breaker module 1 change of current branch road 12 of comprising mechanical switch 11 and being connected in parallel with mechanical switch 11; Change of current branch road 12 comprises the positive charge change of current module 121, commutation capacitor 122 and the reverse charging change of current module 123 that are sequentially connected in series; Producing reverse current by mutual reactor at change of current branch road after positive charge change of current module 121 occurs for forward fault makes mechanical switch cross zero breaking, produces reverse current make mechanical switch cross zero breaking after reverse charging change of current module 123 occurs for reverse fault by mutual reactor at change of current branch road.Forward trigger module 31 is connected in parallel with the positive charge change of current module 121 in n breaker module 1 respectively; Forward trigger module 31 is for conduct positive charging change of current module 121 during forward fault; Reverse trigger module 32 is connected in parallel with the reverse charging change of current module 123 in n breaker module 1 respectively; Reverse trigger module 32 is for conducting reverse charging change of current module during reverse fault.Energy-absorbing pressure limiting module 2 is zinc oxide arrester, is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes mechanical switch 11.

The mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 5th embodiment provides is connected by multimode can cut-off larger electric current.Simultaneously, realize multiple change of current module primary side that charges in the same way by mutual reactor and share a trigger switch, trigger multiple charging change of current module by two trigger switches simultaneously, greatly reduce the number of trigger switch in multimode circuit breaker, save cost, also made control more simple.In addition, the circuit breaker that is applied as of change of current module of charging provides two-way function of cut-offfing.

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Fig. 7 provides for the utility model the 6th embodiment; For convenience of explanation, illustrate only the part relevant to the utility model embodiment, details are as follows:

Mixed high-voltage DC circuit breaker with mutual reactor comprises: n the mechanical switch 11 be connected in series and energy-absorbing pressure limiting module 2 in parallel with it, the change of current branch road 12 in parallel with any one mechanical switch in n mechanical switch 11, forward trigger module 31 and reverse trigger module 32; N be not less than 1 integer; Wherein, change of current branch road 12 comprises the positive charge change of current module 121, commutation capacitor 122 and the reverse charging change of current module 123 that are sequentially connected in series; Producing reverse current by mutual reactor at change of current branch road after positive charge change of current module 121 occurs for forward fault makes mechanical switch cross zero breaking, produces reverse current make mechanical switch cross zero breaking after reverse charging change of current module 123 occurs for reverse fault by mutual reactor at change of current branch road.Forward trigger module 31 is connected in parallel with positive charge change of current module 121 respectively; Forward trigger module 31 is for conduct positive charging change of current module 121 during forward fault; Reverse trigger module 32 is connected in parallel with reverse charging change of current module 123 respectively; Reverse trigger module 32 is for conducting reverse charging change of current module during reverse fault.Energy-absorbing pressure limiting module 2 is zinc oxide arrester, is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes mechanical switch 11.

The multiple mechanical switch of mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 6th embodiment provides shares a change of current branch road, the quantity of change of current branch road can be reduced when voltage is not very high by this mode, make circuit structure more simple.In addition, the circuit breaker that is applied as of change of current module of charging provides two-way function of cut-offfing.

Fig. 8 shows the theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 7th embodiment provides; For convenience of explanation, illustrate only the part relevant to the utility model embodiment, details are as follows:

Mixed high-voltage DC circuit breaker with mutual reactor comprises n the breaker module 1 be connected in series, the energy-absorbing pressure limiting module 2 in parallel with each breaker module 1, forward trigger module 31 and reverse trigger module 32; N be not less than 1 integer; Wherein, each breaker module 1 change of current branch road 12 of comprising mechanical switch 11 and being connected in parallel with mechanical switch 11; Change of current branch road 12 comprises the positive charge change of current module 121, commutation capacitor 122 and the reverse charging change of current module 123 that are sequentially connected in series; Producing reverse current by mutual reactor at change of current branch road after positive charge change of current module 121 occurs for forward fault makes mechanical switch cross zero breaking, produces reverse current make mechanical switch cross zero breaking after reverse charging change of current module 123 occurs for reverse fault by mutual reactor at change of current branch road.Forward trigger module 31 is connected in parallel with the positive charge change of current module 121 in n breaker module 1 respectively; Forward trigger module 31 is for conduct positive charging change of current module 121 during forward fault; Reverse trigger module 32 connects with the trigger control end of the reverse charging change of current module 123 in n breaker module 1 and connects respectively; Reverse trigger module 32 is for conducting reverse charging change of current module during reverse fault.Energy-absorbing pressure limiting module 2 is zinc oxide arrester, is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes mechanical switch 11.

The mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 7th embodiment provides is connected by multimode can cut-off larger electric current.Simultaneously, realize multiple change of current module primary side that charges in the same way by mutual reactor and share a trigger switch, trigger multiple charging change of current module by two trigger switches simultaneously, greatly reduce the number of trigger switch in multimode circuit breaker, save cost, also made control more simple.In addition, the circuit breaker that is applied as of change of current module of charging provides two-way function of cut-offfing.

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Fig. 9 provides for the utility model the 8th embodiment; For convenience of explanation, illustrate only the part relevant to the utility model embodiment, details are as follows:

Mixed high-voltage DC circuit breaker with mutual reactor comprises: the energy-absorbing pressure limiting module of n the mechanical switch 11 be connected in series and the individual parallel connection with it of n, change of current branch road 12, forward trigger module 31 and the reverse trigger module 32 in parallel with n mechanical switch 11; N be not less than 1 integer; Wherein, change of current branch road 12 comprises the positive charge change of current module 121, commutation capacitor 122 and the reverse charging change of current module 123 that are sequentially connected in series; Producing reverse current by mutual reactor at change of current branch road after positive charge change of current module 121 occurs for forward fault makes mechanical switch cross zero breaking, produces reverse current make mechanical switch cross zero breaking after reverse charging change of current module 123 occurs for reverse fault by mutual reactor at change of current branch road.Forward trigger module 31 is connected in parallel with the trigger control end of positive charge change of current module 121 respectively; Forward trigger module 31 is for conduct positive charging change of current module 121 during forward fault; Reverse trigger module 32 is connected in parallel with reverse charging change of current module 123 respectively; Reverse trigger module 32 is for conducting reverse charging change of current module during reverse fault.Energy-absorbing pressure limiting module 2 is zinc oxide arrester, is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes mechanical switch 11.

The multiple mechanical switch of mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 8th embodiment provides shares a change of current branch road, the quantity of change of current branch road can be reduced when voltage is not very high by this mode, make circuit structure more simple.In addition, the circuit breaker that is applied as of change of current module of charging provides two-way function of cut-offfing.

Figure 10 shows change of current branch road and the trigger switch topological structure of the mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model embodiment provides; For convenience of explanation, illustrate only the part relevant to the utility model embodiment, details are as follows:

Positive charge change of current module 121, commutation capacitor 122 and reverse charging change of current module 123 are connected; Positive charge change of current module 121 comprises coupling capacitance, the freewheeling circuit in parallel with coupling capacitance of the mutual reactor that secondary side connects with commutation capacitor 122, the trigger switch of connecting with mutual reactor secondary side and oppositely precharge, and forward trigger module 31 is in parallel with the mutual reactor primary side of positive charge change of current module 121; Reverse charging change of current module 123 comprises the mutual reactor that secondary side connects with commutation capacitor, the trigger switch of connecting with mutual reactor secondary side and the coupling capacitance of forward precharge, the freewheeling circuit in parallel with coupling capacitance, and reverse trigger module 32 is in parallel with the mutual reactor primary side of reverse charging module; Freewheeling circuit is resistance and the diode of series connection, for limiting the voltage direction at coupling capacitance two ends.

When forward fault occurs, line current rises, through certain time-delay, mechanical switch separating brake, when separating brake is to when effectively opening distance, the conducting of forward trigger switch, in positive charge change of current module, coupling capacitance starts electric discharge, produce reverse current by mutual reactor at change of current branch road, this reverse current is superimposed upon on mechanical switch branch road and makes mechanical switch both end voltage zero passage, and mechanical switch blow-out realizes cut-offfing.Along with electric current constantly injects change of current branch road, mechanical switch end fracture voltage constantly rises, and when voltage reaches energy-absorbing pressure limiting module action voltage, current transfer, to energy-absorbing pressure limiting branch road, consumes the energy stored in system.Realize cut-offfing completely of fault.

When reverse fault occurs, line current rises, through certain time-delay, mechanical switch separating brake, when separating brake is to when effectively opening distance, reverse trigger switch conducting, coupling capacitance in reverse charging change of current module starts electric discharge, produce reverse current by mutual reactor at change of current branch road, this reverse current is superimposed upon on mechanical switch branch road and makes mechanical switch both end voltage zero passage, and mechanical switch blow-out realizes cut-offfing.Along with electric current constantly injects change of current branch road, mechanical switch end fracture voltage constantly rises, and when voltage reaches energy-absorbing pressure limiting module action voltage, current transfer, to energy-absorbing pressure limiting branch road, consumes the energy stored in system.Realize cut-offfing completely of fault.

Figure 11 shows the theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 9th embodiment provides; For convenience of explanation, illustrate only the part relevant to the utility model embodiment, details are as follows:

The energy-absorbing pressure limiting module 2 that mixed high-voltage DC circuit breaker with mutual reactor comprises breaker module 1 that n is connected in series, be connected in parallel with all breaker modules 1, forward trigger module 31 and reverse trigger module 32; N be not less than 1 integer; The change of current branch road 12 that breaker module 1 comprises mechanical switch 11 and is connected in parallel with mechanical switch 11; Change of current branch road 12 comprises the positive charge change of current module 121 and commutation capacitor 122 that are sequentially connected in series and the reverse charging change of current module 123 be connected in parallel with positive charge change of current module 121; Producing reverse current by mutual reactor at change of current branch road after positive charge change of current module 121 occurs for forward fault makes mechanical switch cross zero breaking, produces reverse current make mechanical switch cross zero breaking after reverse charging change of current module 123 occurs for reverse fault by mutual reactor at change of current branch road.Forward trigger module 31 is for conduct positive charging change of current module during forward fault; Reverse trigger module 32 is for conducting reverse charging change of current module during reverse fault.Energy-absorbing pressure limiting module 2 is zinc oxide arrester, is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch 11.

The mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 9th embodiment provides is connected by multimode can cut-off larger electric current.Simultaneously, realize multiple change of current module primary side that charges in the same way by mutual reactor and share a trigger switch, trigger multiple charging change of current module by two trigger switches simultaneously, greatly reduce the number of trigger switch in multimode circuit breaker, save cost, also made control more simple.In addition, the circuit breaker that is applied as of change of current module of charging provides two-way function of cut-offfing.

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Figure 12 provides for the utility model the tenth embodiment; For convenience of explanation, illustrate only the part relevant to the utility model embodiment, details are as follows:

Change of current branch road 12, forward trigger module 31 and reverse trigger module 32 that mixed high-voltage DC circuit breaker with mutual reactor comprises n mechanical switch 11 and energy-absorbing pressure limiting module 2 in parallel with it, is connected in parallel with n mechanical switch; N be not less than 1 integer; Change of current branch road 12 comprises the positive charge change of current module 121 and commutation capacitor 122 that are connected in series and the reverse charging change of current module 123 be connected in parallel with positive charge change of current module 121; Producing reverse current by mutual reactor at change of current branch road after positive charge change of current module 121 occurs for forward fault makes mechanical switch cross zero breaking, produces reverse current make mechanical switch cross zero breaking after reverse charging change of current module 123 occurs for reverse fault by mutual reactor at change of current branch road.Forward trigger module 31 is for conduct positive charging change of current module during forward fault; Reverse trigger module 32 is for conducting reverse charging change of current module during reverse fault.Energy-absorbing pressure limiting module 2 is zinc oxide arrester, is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes mechanical switch 11.

The multiple mechanical switch of mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the tenth embodiment provides shares a change of current branch road, the quantity of change of current branch road can be reduced when voltage is not very high by this mode, make circuit structure more simple.In addition, the circuit breaker that is applied as of change of current module of charging provides two-way function of cut-offfing.

Figure 13 shows the theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 11 embodiment provides; For convenience of explanation, illustrate only the part relevant to the utility model embodiment, details are as follows:

The energy-absorbing pressure limiting module 2 that mixed high-voltage DC circuit breaker with mutual reactor comprises breaker module 1 that n is connected in series, be connected in parallel with each breaker module 1, forward trigger module 31 and reverse trigger module 32; N be not less than 1 integer; The change of current branch road 12 that breaker module 1 comprises mechanical switch 11 and is connected in parallel with mechanical switch 11; Change of current branch road 12 comprises the positive charge change of current module 121 and commutation capacitor 122 that are sequentially connected in series and the reverse charging change of current module 123 be connected in parallel with positive charge change of current module 121; Producing reverse current by mutual reactor at change of current branch road after positive charge change of current module 121 occurs for forward fault makes mechanical switch cross zero breaking, produces reverse current make mechanical switch cross zero breaking after reverse charging change of current module 123 occurs for reverse fault by mutual reactor at change of current branch road.Forward trigger module 31 is for conduct positive charging change of current module during forward fault; Reverse trigger module 32 is for conducting reverse charging change of current module during reverse fault.Energy-absorbing pressure limiting module 2 is zinc oxide arrester, is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch 11.

The mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 11 embodiment provides is connected by multimode can cut-off larger electric current.Simultaneously, realize multiple change of current module primary side that charges in the same way by mutual reactor and share a trigger switch, trigger multiple charging change of current module by two trigger switches simultaneously, greatly reduce the number of trigger switch in multimode circuit breaker, save cost, also made control more simple.In addition, the circuit breaker that is applied as of change of current module of charging provides two-way function of cut-offfing.

The theory diagram of the mixed high-voltage DC circuit breaker of the band mutual reactor that Figure 14 provides for the utility model the 12 embodiment; For convenience of explanation, illustrate only the part relevant to the utility model embodiment, details are as follows:

The multiple mechanical switch of mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model the 12 embodiment provides shares a change of current branch road, the quantity of change of current branch road can be reduced when voltage is not very high by this mode, make circuit structure more simple.In addition, the circuit breaker that is applied as of change of current module of charging provides two-way function of cut-offfing.

Figure 15 shows change of current branch road in the mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model embodiment provides and trigger switch topological structure; For convenience of explanation, illustrate only the part relevant to the utility model embodiment, details are as follows:

Positive charge change of current module 121 is connected with commutation capacitor 122 with after the parallel connection of reverse charging change of current module 123 again; Positive charge change of current module comprises coupling capacitance, the freewheeling circuit in parallel with coupling capacitance of the mutual reactor that secondary side connects with commutation capacitor, the trigger switch of connecting with mutual reactor secondary side and oppositely precharge, and forward trigger module 31 is in parallel with the mutual reactor primary side of positive charge change of current module; Reverse charging change of current module comprises the mutual reactor that secondary side connects with commutation capacitor, the trigger switch of connecting with mutual reactor secondary side and the coupling capacitance of forward precharge, the freewheeling circuit in parallel with coupling capacitance, and reverse trigger module 32 is in parallel with the mutual reactor primary side of reverse charging module; Freewheeling circuit is resistance and the diode of series connection, for limiting the voltage direction at coupling capacitance two ends.

When forward fault occurs, line current rises, through certain time-delay, mechanical switch separating brake, when separating brake is to when effectively opening distance, the conducting of forward trigger switch, coupling capacitance in positive charge change of current module starts electric discharge, produce reverse current by mutual reactor at change of current branch road, this reverse current is superimposed upon on mechanical switch branch road and makes mechanical switch both end voltage zero passage, and mechanical switch blow-out realizes cut-offfing.Along with electric current constantly injects change of current branch road, mechanical switch end fracture voltage constantly rises, and when voltage reaches energy-absorbing pressure limiting module action voltage, current transfer, to energy-absorbing pressure limiting branch road, consumes the energy stored in system.Realize cut-offfing completely of fault.

Figure 16 shows change of current branch road in the mixed high-voltage DC circuit breaker of the band mutual reactor that the utility model embodiment provides and trigger switch topological structure; For convenience of explanation, illustrate only the part relevant to the utility model embodiment, details are as follows:

The charging change of current module primary side when mixed high-voltage DC circuit breaker multimode of the band mutual reactor that the utility model embodiment provides connects and trigger switch topology.When circuit breaker is multiple mechanical switch module-cascade, change of current module of charging in the same way primary side is connected in parallel, then connects with trigger switch.By a trigger switch multiple change of current module of charging in the same way simultaneously, greatly reduce the number of trigger switch in multimode circuit breaker.

This direct-current breaker topology isolates charge circuit by mutual reactor, decreases the number of trigger switch, greatly reduces cost, and make it control more convenient, circuit structure is simpler simultaneously; In addition this circuit breaker charging change of current module provides the two-way function of cut-offfing of fault.

Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.

Claims

1. the high voltage DC breaker with mutual reactor, it is characterized in that, comprise n the breaker module (1) be connected in series, the energy-absorbing pressure limiting module (2) be connected in parallel with n breaker module (1) and trigger module (3);

The change of current branch road (12) that described breaker module (1) comprises mechanical switch (11) and is connected in parallel with described mechanical switch (11); Described change of current branch road (12) comprises the charging change of current module (120) and commutation capacitor (122) that are sequentially connected in series; Described charging change of current module (120) makes described mechanical switch (11) realize cut-offfing for charging to described commutation capacitor (122) and producing high frequency reverse current;

Described energy-absorbing pressure limiting module (2) is cut off for absorbing fault current the voltage-limiting protection that energy that inductive element in rear electric power system stores realizes described mechanical switch (11);

Described trigger module (3) is connected in parallel with n described charging change of current module (120), and makes its conducting after a failure for control n described charging change of current module (120); N be more than or equal to 1 positive integer.

2. the high voltage DC breaker with mutual reactor, it is characterized in that, comprise n the mechanical switch (11) be connected in series, the energy-absorbing pressure limiting module (2) be connected in parallel with n mechanical switch, trigger module (3) and the change of current branch road (12) be connected in parallel with n mechanical switch;

Described change of current branch road (12) comprises the charging change of current module (120) and commutation capacitor (122) that are sequentially connected in series; Described charging change of current module (120) makes described mechanical switch (11) realize cut-offfing for charging to described commutation capacitor (122) and producing high frequency reverse current;

Described trigger module (3) and described charging change of current module (120) are connected in parallel, and make its conducting after a failure for controlling described charging change of current module (120); N be more than or equal to 1 positive integer.

3. the high voltage DC breaker with mutual reactor, it is characterized in that, comprise n the breaker module (1) be connected in series, n the energy-absorbing pressure limiting module (2) and trigger module (3) be connected in parallel with n breaker module (1) respectively;

4. the high voltage DC breaker with mutual reactor, it is characterized in that, comprise n the mechanical switch (11) be connected in series, n the energy-absorbing pressure limiting module (2) be connected in parallel with n mechanical switch (11) respectively, trigger module (3), and the change of current branch road (12) be connected in parallel with n mechanical switch;

5. the high voltage DC breaker as described in any one of claim 1-4, it is characterized in that, described charging change of current module (120) comprises mutual reactor, the coupling capacitance C2 be connected in series with one end of described mutual reactor primary side and the freewheeling circuit be connected in parallel with described coupling capacitance C2;

Described mutual reactor secondary side is used for being connected in series with described commutation capacitor (122); Described mutual reactor primary side and described trigger module (3) are connected in parallel.

6. high voltage DC breaker as claimed in claim 5, it is characterized in that, described freewheeling circuit comprises the resistance R1 and diode D1 that are sequentially connected in series.

7. the high voltage DC breaker with mutual reactor, it is characterized in that, comprise breaker module (1) that n is connected in series, the energy-absorbing pressure limiting module (2) be connected in parallel with n breaker module (1), a forward trigger module (31) and a reverse trigger module (32);

The change of current branch road (12) that each breaker module (1) comprises mechanical switch (11) and is connected in parallel with described mechanical switch (11); Described change of current branch road (12) comprises the positive charge change of current module (121), commutation capacitor (122) and the reverse charging change of current module (123) that are sequentially connected in series;

Producing reverse current by mutual reactor at change of current branch road after described positive charge change of current module (121) occurs for forward fault makes mechanical switch cross zero breaking, produces reverse current make mechanical switch cross zero breaking after described reverse charging change of current module (123) occurs for reverse fault by mutual reactor at change of current branch road;

Described forward trigger module (31) is connected in parallel, for positive charge change of current module (121) described in conducting during forward fault with the described positive charge change of current module (121) in n breaker module (1) respectively; Described reverse trigger module (32) is connected in parallel, for reverse charging change of current module (123) described in conducting during reverse fault with the described reverse charging change of current module (123) in n breaker module (1) respectively; N be more than or equal to 1 positive integer.

8. the high voltage DC breaker with mutual reactor, it is characterized in that, comprise n the mechanical switch (11) be connected in series, the energy-absorbing pressure limiting module (2) be connected in parallel with n mechanical switch (11), the change of current branch road (12) be connected in parallel with n mechanical switch (11), a forward trigger module (31) and a reverse trigger module (32);

Described change of current branch road (12) comprises the positive charge change of current module (121), commutation capacitor (122) and the reverse charging change of current module (123) that are sequentially connected in series; Producing reverse current by mutual reactor at change of current branch road after described positive charge change of current module (121) occurs for forward fault makes mechanical switch cross zero breaking, produces reverse current make mechanical switch cross zero breaking after described reverse charging change of current module (123) occurs for reverse fault by mutual reactor at change of current branch road;

Described forward trigger module (31) and described positive charge change of current module (121) are connected in parallel, for positive charge change of current module (121) described in conducting during forward fault;

Described reverse trigger module (32) and described reverse charging change of current module (123) are connected in parallel, for conducting reverse charging change of current module during reverse fault; N be more than or equal to 1 positive integer.

9. the high voltage DC breaker with mutual reactor, it is characterized in that, comprise breaker module (1) that n is connected in series, the energy-absorbing pressure limiting module (2) that n is connected in parallel with n breaker module (1) respectively, a forward trigger module (31) and a reverse trigger module (32);

10. the high voltage DC breaker with mutual reactor, it is characterized in that, comprise n the mechanical switch (11) be connected in series, n the energy-absorbing pressure limiting module (2) be connected in parallel with n mechanical switch (11) respectively, the change of current branch road (12) be connected in parallel with n mechanical switch (11), a forward trigger module (31) and a reverse trigger module (32);

11. 1 kinds of high voltage DC breakers with mutual reactor, it is characterized in that, comprise breaker module (1) that n is connected in series, the energy-absorbing pressure limiting module (2) be connected in parallel with n breaker module (1), a forward trigger module (31) and a reverse trigger module (32);

The change of current branch road (12) that described breaker module (1) comprises mechanical switch (11) and is connected in parallel with described mechanical switch (11); Described change of current branch road (12) comprises the positive charge change of current module (121) and commutation capacitor (122) that are sequentially connected in series and the reverse charging change of current module (123) be connected in parallel with described positive charge change of current module (121); Producing reverse current by mutual reactor at change of current branch road after described positive charge change of current module (121) occurs for forward fault makes mechanical switch cross zero breaking, produces reverse current make mechanical switch cross zero breaking after described reverse charging change of current module (123) occurs for reverse fault by mutual reactor at change of current branch road;

Described forward trigger module (31) is for positive charge change of current module (121) described in conducting during forward fault; Described reverse trigger module (32) is for reverse charging change of current module (123) described in conducting during reverse fault; N be more than or equal to 1 positive integer.

12. 1 kinds of high voltage DC breakers with mutual reactor, it is characterized in that, comprise n the mechanical switch (11) be connected in series, the energy-absorbing pressure limiting module (2) be connected in parallel with n mechanical switch, the change of current branch road (12) be connected in parallel with n mechanical switch, a forward trigger module (31) and a reverse trigger module (32);

Described change of current branch road (12) comprises the positive charge change of current module (121) and commutation capacitor (122) that are connected in series and the reverse charging change of current module (123) be connected in parallel with described positive charge change of current module (121); Producing reverse current by mutual reactor at change of current branch road after described positive charge change of current module (121) occurs for forward fault makes mechanical switch cross zero breaking, produces reverse current make mechanical switch cross zero breaking after described reverse charging change of current module (123) occurs for reverse fault by mutual reactor at change of current branch road;

13. 1 kinds of high voltage DC breakers with mutual reactor, it is characterized in that, comprise breaker module (1) that n is connected in series, the energy-absorbing pressure limiting module (2) that n is connected in parallel with n breaker module (1) respectively, a forward trigger module (31) and a reverse trigger module (32);

14. 1 kinds of high voltage DC breakers with mutual reactor, it is characterized in that, comprise n the mechanical switch (11) be connected in series, n the energy-absorbing pressure limiting module (2) be connected in parallel with n mechanical switch respectively, the change of current branch road (12) be connected in parallel with n mechanical switch, a forward trigger module (31) and a reverse trigger module (32);

15. high voltage DC breakers as described in any one of claim 7-14, it is characterized in that, described positive charge change of current module (121) comprises mutual reactor, coupling capacitance C2 and the freewheeling circuit be connected in parallel with described coupling capacitance C2;

The secondary side of described mutual reactor is used for being connected in series with described commutation capacitor (122); One end of the primary side of described mutual reactor is by described coupling capacitance C2 ground connection, and the other end of the primary side of described mutual reactor is for connecting described forward trigger module (31);

Described freewheeling circuit comprises the diode and resistance that are sequentially connected in series; The positive pole of described diode is connected with described coupling capacitance C2, and the negative pole of described diode is connected with described resistance R1.

16. high voltage DC breakers as described in any one of claim 7-14, it is characterized in that, described reverse charging change of current module (123) comprises mutual reactor, coupling capacitance C2 and the freewheeling circuit be connected in parallel with described coupling capacitance C2;

The secondary side of described mutual reactor is used for being connected in series with described commutation capacitor (122); One end of the primary side of described mutual reactor is by described coupling capacitance C2 ground connection, and the other end of the primary side of described mutual reactor is for connecting described reverse trigger module (32);

Described freewheeling circuit comprises the diode and resistance that are sequentially connected in series; The negative pole of described diode is connected with described coupling capacitance C2, and the positive pole of described diode is connected with described resistance R1.