CN103078306B - Fault current limiter on basis of combined rapid switch-on switch - Google Patents
Fault current limiter on basis of combined rapid switch-on switch Download PDFInfo
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- CN103078306B CN103078306B CN201310007027.9A CN201310007027A CN103078306B CN 103078306 B CN103078306 B CN 103078306B CN 201310007027 A CN201310007027 A CN 201310007027A CN 103078306 B CN103078306 B CN 103078306B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
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Abstract
The invention relates to a fault current limiter on the basis of a combined rapid switch-on switch. The combined rapid switch-on switch is firstly connected in parallel with a capacitor C and then is connected in series with a conventional reactor L; the combined rapid switch-on switch is formed by combining a tight coupling double-winding reactor and a rapid switch-on switch, of which dotted terminals are opposite; a first winding L1 of the tight coupling double-winding reactor is firstly connected in series with the rapid switch-on switch and then is connected in parallel with a second winding L2; the rapid switch-on switch is formed by connecting one group or a plurality of groups of mechanical switches K, transistors T, controllable trigger gaps G and lightning arresters MOV in parallel; and in the case of a short circuit fault, switch-on on the first winding L1 of the tight coupling double-winding reactor can be implemented by selecting the rapid switch-on switch with tolerance to a low short circuit current. After the first winding L is conducted, reactances generated by the first winding L1 and the second winding L2 of the tight coupling double-winding reactor are balanced out mutually, so that the reactances are reduced.
Description
Technical field
The present invention relates to a kind of fault current limiter.
Background technology
Along with the fast development of national economy, society constantly increases the demand of electric power, drive the development of electric power system, unit and station capacity, substation capacity, city and center of industry load constantly increase, just make between electric power system interconnected, short circuit current level in electrical network at different levels improves constantly, and the destructiveness of short trouble to electric power system and connected electric equipment thereof is also increasing.And while growing to the demand of electric energy, people it is also proposed higher requirement to the quality of power supply, power supply reliability and fail safe etc.But the transient stability sex chromosome mosaicism of bulk power grid is more outstanding, wherein one of most important reason is because conventional electric power technology lacks effective short-circuit current restriction technologies.At present, circuit breaker is extensively adopted fully to cut-off short circuit current in the world, because short circuit current level is directly related with the capacity of system, when the specified drop-out current level of circuit breaker is certain, adopt and fully cut-off the growth that short circuit current will limit the capacity of electric power system, and expensive and its price of circuit breaker rises rapidly with the increase of its specified drop-out current.Along with the expansion of net capacity and scale, the connecting-disconnecting function of circuit breaker has more and more been difficult to the needs adapting to operation of power networks.
Short-circuit fault current limiter is that the solution of this problem provides new approaches.The fault current limiter technology of current comparative maturity mainly contains series connection current limiting reactor, series resonant-type fault current limiter, controlled series compensation fault current limiter etc., and the fault current limiter technology being in conceptual phase mainly applies the current limiting technique that new material realizes, comprise superconductive current limiter, PTC thermistor flow restricter and solid-state current limiter.In current flow restricter technology, the most ripe with the technology of connect current limiting reactor and series resonance-type flow restricter, reliability is also the highest.Series resonance-type flow restricter does not have reactive power loss, has great application prospect.For series resonance-type flow restricter, capacitor bypass resistance is a key technology, mainly contain following several bypass resistance: (operating characteristic of two kinds of economical fault current limiters compares based on the bypass resistance of saturable reactor, Power System and its Automation journal, 2005, 17(4): 71-75), based on the bypass resistance (impact of MOA-based FCL on power system transient stability of lightning arrester, Electric Power Automation Equipment, 2007, 27(8): 51-54) and based on the bypass resistance of power electronics and high-speed switch (based on the emulation of the series resonance-type fault current limiter of high-speed switch, high voltage technique, 2006, 32(5): 80-83).But above-mentioned all capacitor bypass resistances all need by close to whole short circuit currents, therefore, capacitor bypass resistance parts need to design according to the whole short circuit current of tolerance, and cost is very high.
Summary of the invention
The object of the invention is to the shortcoming overcoming classical tandem mode of resonance fault current limiter, propose a kind of fault current limiter based on composite type rapid closing switch.The mode that this composite type rapid closing switch adopts a branch road of the contrary close coupling double winding reactor of Same Name of Ends to connect with rapid closing switch, can reduce the short-circuit impact electric current of rapid closing switch; The mode that a branch road of secondary double winding reactor in two-level concatenation structure close coupling double winding reactor also can be adopted to connect with rapid closing switch, can be down to lower by the short-circuit impact electric current of rapid closing switch; Also can adopt the mode of a branch road and the one group of rapid closing switch series connection often organizing reactor in two groups of cascaded structure Same Name of Ends contrary close coupling double winding reactors, the short-circuit impact electric current of rapid closing switch and overvoltage all can be reduced.The fault current limiter based on composite type rapid closing switch that the present invention proposes, implements flexibly, easily, can be applicable in the network system of various different electric pressure, different capabilities.
To achieve these goals, the technical solution used in the present invention is as follows:
The fault current limiter that the present invention is based on composite type rapid closing switch is made up of conventional reactor or the identical close coupling reactor of Same Name of Ends, capacitor and composite type rapid closing switch.Described composite type rapid closing switch is connected with conventional reactor with the first parallel connection of capacitor again, or a branch road of Same Name of Ends identical close coupling double winding reactor is connected with composite type rapid closing switch, another branch road of Same Name of Ends identical close coupling double winding reactor is connected with capacitor.
Described composite type rapid closing switch is made up of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch.
Described Same Name of Ends identical close coupling double winding reactor is made up of the hollow of the first winding, the second winding and rectangle, closed or semi-closed iron core, and the first described winding is identical with the number of turn of the second winding, is wound on stem stem with parallel way.
The Same Name of Ends contrary close coupling double winding reactor of composition composite type rapid closing switch is made up of the hollow of the first winding, the second winding and rectangle, closed or semi-closed iron core, the first described winding is identical with the number of turn of the second winding, is wound on stem stem in inverse parallel mode.
Described fault current limiter is connected in network system.
The present invention can adopt following two kinds of technical schemes:
The first fault current limiter adopt composite type rapid closing switch in parallel with capacitor elder generation after, then to connect with conventional reactor.When normally working, composite type rapid closing switch is large impedance state, and electric current mainly flows through from the circuit that conventional reactor and capacitor are composed in series, and conventional reactor becomes series resonant circuit with Capacitor banks, in low impedance state, very little on network system impact.When network system breaks down short circuit, the fast reaction of composite type rapid closing switch is little impedance state, and short circuit current transfers to rapid closing switch branch road from capacitor branches, and the impedance of whole network system increases, and short circuit current declines.
The second fault current limiter adopts a branch road of Same Name of Ends identical close coupling double winding reactor to connect with composite type rapid closing switch, and another branch road of Same Name of Ends identical close coupling double winding reactor is connected with capacitor; When normally working, composite type rapid closing switch is large impedance state, electric current mainly flows through from the circuit that Same Name of Ends identical close coupling double winding reactor and capacitor are composed in series, Same Name of Ends identical close coupling double winding reactor becomes series resonant circuit to be low impedance state with Capacitor banks, very little on network system impact.When network system breaks down short circuit, the fast reaction of composite type rapid closing switch is little impedance state, and short circuit current transfers to rapid closing switch branch road from capacitor branches, and the impedance of whole network system increases, and short circuit current declines;
Described composite type rapid closing switch also can adopt following three kinds of technical schemes:
The first composite type rapid closing switch is combined by Same Name of Ends contrary close coupling double winding reactor and rapid closing switch.First winding elder generation of described Same Name of Ends contrary close coupling double winding reactor and rapid closing switch series connection, then the second winding parallel of close coupling double winding reactor contrary to described Same Name of Ends.Described rapid closing switch is composed in parallel by one or more groups in mechanical switch, thyristor, controlled triggered gap and several switchgear of lightning arrester; When short trouble, the combined floodgate of rapid closing switch realization to described Same Name of Ends contrary close coupling double winding reactor first winding that tolerance short circuit current can be selected lower.After the first winding of described Same Name of Ends contrary close coupling double winding reactor is connected, the reactance that the first winding of described Same Name of Ends contrary close coupling double winding reactor and the second winding produce cancels each other, and total reactance reduces.
The second composite type rapid closing switch adopts the Same Name of Ends contrary close coupling double winding reactor of two-level concatenation and rapid closing switch to combine.Described Same Name of Ends contrary close coupling double winding reactor adopts two-level concatenation mode to connect, first winding and the rapid closing switch of second level Same Name of Ends contrary close coupling double winding reactor are first connected, the second winding parallel of the first winding close coupling double winding contrary to second level Same Name of Ends reactor of then described second level Same Name of Ends contrary close coupling double winding reactor; First windings in series of described second level Same Name of Ends contrary close coupling double winding reactor close coupling double winding contrary to first order Same Name of Ends reactor, then the second winding parallel of close coupling double winding reactor contrary to first order Same Name of Ends.Described rapid closing switch is composed in parallel by one or more groups in mechanical switch, thyristor, controlled triggered gap and lightning arrester; When short trouble, the combined floodgate of rapid closing switch realization to secondary close coupling double winding reactor first winding that tolerance short circuit current can be selected lower.After the first winding conducting of secondary close coupling double winding reactor, the reactance that one-level close coupling double winding reactor and each branch road winding of secondary close coupling double winding reactor produce can cancel each other, and total reactance reduces.
The third composite type rapid closing switch adopts the two groups of Same Name of Ends contrary close coupling double winding reactors and rapid closing switch combination formation that are connected in series.Two groups of Same Name of Ends contrary close coupling double winding reactors are connected in series, first winding and first group of rapid closing switch of first group of Same Name of Ends contrary close coupling double winding reactor are first connected, the second winding parallel of then with the first group of Same Name of Ends contrary close coupling double winding reactor; First winding and second group of rapid closing switch of second group of Same Name of Ends contrary close coupling double winding reactor are first connected, the second winding parallel of then with the second group of Same Name of Ends contrary close coupling double winding reactor; First group of Same Name of Ends contrary close coupling double winding reactor and second group of Same Name of Ends contrary close coupling double winding reactor are finally connected.Described rapid closing switch is composed in parallel by one or more groups in mechanical switch, thyristor, controlled triggered gap and several switchgear of lightning arrester; When short trouble, the combined floodgate that tolerance short circuit current and all lower rapid closing switch of voltage realize two groups of Same Name of Ends contrary close coupling double winding reactor first windings can be selected.At the first winding of two groups of Same Name of Ends contrary close coupling double winding reactors all after conducting, the reactance that two groups of each branch road windings of Same Name of Ends contrary close coupling double winding reactor produce can cancel each other, and total reactance reduces.
Fault current limiter of the present invention shows as Low ESR when normal operation, and shows as large impedance when short trouble.Close coupling double winding reactor in fault current limiter of the present invention can adopt hollow, iron core or half core structure; Close coupling double winding reactor and rapid closing switch all can adopt three-phase absolute construction or three-phase combining structure.
The present invention has following major advantage:
1) the stable state impact of fault current limiter of the present invention on electrical network is little.When normally running, the steady state impedance of fault current device is very little, and can not increase electric power System Reactive Power.
2) the present invention suppresses the peak value of fault current by the impedance variation of close coupling double winding reactor self in composite type rapid closing switch, then by the closed steady-state value suppressing fault current of rapid closing switch, therefore, this fault current limiter is fast to fault current response, and structure is simple, reliability is high.
3) the present invention can be used for constructing jumbo fault current limiter.The mode adopting the single branch road of close coupling double winding reactor to connect with rapid closing switch reduces the capacity of short circuit of rapid closing switch, reduces technical difficulty and the cost of the making of large-scale rapid closing switch, more has the market competitiveness.
Accompanying drawing explanation
Fig. 1 is the circuit of composite type rapid closing switch when steady operation and magnetic circuit schematic diagram;
Fig. 2 is the circuit of composite type rapid closing switch when short circuit and magnetic circuit schematic diagram;
Fig. 3 is the equivalent circuit diagram of composite type rapid closing switch;
Fig. 4 is the equivalent circuit diagram of two-level concatenation textural association formula rapid closing switch;
Fig. 5 is the equivalent circuit diagram of two groups of cascaded structure composite type rapid closing switchs;
Fig. 6 is the fault current limiter equivalent circuit diagram of the specific embodiment of the invention 1 based on composite type rapid closing switch;
Fig. 7 is the fault current limiter equivalent circuit diagram of the specific embodiment of the invention 2 another kind based on composite type rapid closing switch;
Fig. 8 is the fault current limiter equivalent circuit diagram of the specific embodiment of the invention 3 based on two-level concatenation textural association formula rapid closing switch;
Fig. 9 is the fault current limiter equivalent circuit diagram of the specific embodiment of the invention 4 another kind based on two-level concatenation textural association formula rapid closing switch.
Figure 10 is the fault current limiter equivalent circuit diagram of the specific embodiment of the invention 5 one kinds based on two groups of cascaded structure composite type rapid closing switchs.
Figure 11 is the fault current limiter equivalent circuit diagram of the specific embodiment of the invention 6 another kind based on two groups of cascaded structure composite type rapid closing switchs.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
The fault current limiter that the present invention is based on composite type rapid closing switch is made up of conventional reactor or Same Name of Ends identical close coupling double winding reactor, capacitor and composite type rapid closing switch.Described composite type rapid closing switch is made up of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch K.
Figure 1 shows that the circuit of composite type rapid closing switch when steady operation and magnetic circuit schematic diagram.As shown in Figure 1, described composite type rapid closing switch is by Same Name of Ends contrary close coupling double winding reactor, and rapid closing switch K combines, Same Name of Ends contrary close coupling double winding reactor is made up of the first winding L 1, second winding L 2 and the hollow of rectangle, iron core that is closed or semi-closed.In described Same Name of Ends contrary close coupling double winding reactor, the first described winding L 1 is identical with the number of turn of the second winding L 2, is wound on stem stem in inverse parallel mode.First winding L 1 elder generation of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch K connect, and then in parallel with the second described winding L 2.When steady operation, rapid closing switch K is in the state of cut-offfing, and the resistance value of rapid closing switch is L
2, in large impedance.
Figure 2 shows that the circuit of composite type rapid closing switch when network system is short-circuited fault and magnetic circuit schematic diagram.When breaking down short circuit, rapid closing switch K closes, and Same Name of Ends contrary close coupling double winding reactor first winding L 1 is identical with the electric current that the second winding L 2 is passed through, and the magnetic flux equal and opposite in direction of generation, direction is contrary.The magnetic flux produced due to this Same Name of Ends contrary close coupling double winding reactor is mainly leakage flux, and leakage inductance is relatively very little, therefore in little impedance state.In addition, the first described winding L 1 and the short circuit current of the second winding L 2 are the half of the total short circuit current of system, and therefore, rapid closing switch K can select to tolerate the lower rapid closing switch of short circuit current, and the reliability of rapid closing switch improves, and cost reduces.
Figure 3 shows that the equivalent circuit diagram of composite type rapid closing switch.Composite type rapid closing switch is combined by Same Name of Ends contrary close coupling double winding reactor and rapid closing switch K.The self-induction of Same Name of Ends contrary close coupling double winding reactor two winding L 1 and L2 is respectively L
1and L
2, mutual inductance is M.Because the double winding number of turn is identical, Same Name of Ends is contrary, therefore L
1=L
2, mutual inductance M and L
1and L
2closely.First winding L 1 elder generation of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch K connect, and then the second winding L 2 of close coupling double winding reactor contrary to Same Name of Ends is in parallel.
Figure 4 shows that the equivalent circuit diagram of the composite type rapid closing switch of two-level concatenation structure.Two-level concatenation textural association formula rapid closing switch is combined by first order Same Name of Ends contrary close coupling double winding reactor, second level Same Name of Ends contrary close coupling double winding reactor and rapid closing switch.The self-induction of first order Same Name of Ends contrary close coupling double winding reactor two winding L 1 and L2 is respectively L
1and L
2, mutual inductance is M, L
1=L
2; Structure close coupling double winding contrary to the first order Same Name of Ends reactor of second level Same Name of Ends contrary close coupling double winding reactor is similar, and the first winding L 11 of second level Same Name of Ends contrary close coupling double winding reactor and the mutual inductance of the second winding L 12 are M
1, self-induction L
11=L
12; First winding L 11 elder generation of second level Same Name of Ends contrary close coupling double winding reactor and rapid closing switch K connect, and then the second winding L 12 of close coupling double winding reactor contrary to second level Same Name of Ends is in parallel; First winding L 1 of second level Same Name of Ends contrary close coupling double winding reactor and first order close coupling double winding reactor is connected, and then the second winding L 2 of close coupling double winding reactor contrary to first order Same Name of Ends is in parallel.
Figure 5 shows that the equivalent circuit diagram of the composite type rapid closing switch of two groups of cascaded structures.The composite type rapid closing switch of two groups of cascaded structures is combined by first group of Same Name of Ends contrary close coupling double winding reactor, first group of rapid closing switch, second group of Same Name of Ends contrary close coupling double winding reactor and second group of rapid closing switch.The self-induction of first group of Same Name of Ends contrary close coupling double winding reactor two winding L 1 and L2 is respectively L
1and L
2, mutual inductance is M, L
1=L
2; The structure of second group of Same Name of Ends contrary close coupling double winding reactor is similar with first group of Same Name of Ends contrary close coupling double winding reactor, and the first winding L 11 of second group of Same Name of Ends contrary close coupling double winding reactor and the mutual inductance of the second winding L 12 are M
1, self-induction L
11=L
12; First winding L 1 elder generation of first group of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch K1 connect, and then in parallel with the second winding L 2 of first group of described Same Name of Ends contrary close coupling double winding reactor; First winding L 11 elder generation of second group of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch K2 connect, and then in parallel with the second winding L 12 of second group of Same Name of Ends contrary close coupling double winding reactor; Two groups of Same Name of Ends contrary close coupling double winding reactors are finally connected.
Figure 6 shows that the fault current limiter topological circuit figure of embodiment 1 based on composite type rapid closing switch.The embodiment of the present invention 1 is made up of conventional reactor L, capacitor C and composite type rapid closing switch, and described composite type rapid closing switch is made up of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch.The self-induction of the contrary close coupling double winding of the Same Name of Ends in composite type rapid closing switch reactor two winding L 1 and L2 is respectively L
1and L
2, mutual inductance is M.Because the double winding number of turn is identical, Same Name of Ends is contrary, therefore L
1=L
2, mutual inductance M and L
1and L
2closely.First winding L 1 elder generation of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch series connection, and then the second winding L 2 of close coupling double winding reactor contrary to Same Name of Ends is in parallel; Connect with conventional reactor L again after capacitor C and the parallel connection of composite type rapid closing switch.When network system is normally run, the reactance value L '=L of rapid closing switch
2, L ' can be made to be a very large value by appropriate design, such electric current mainly flows through from the series resonant circuit of L and C composition, very little on network system impact; When network system breaks down short circuit, the reactance of composite type rapid closing switch becomes
it is a very little reactance value; Fault current transfers to composite type rapid closing switch branch road from capacitor C branch road, the impedance of fault current limiter increases and suppresses short circuit current, the short circuit current that rapid closing switch passes through is lower, like this can with the lower rapid closing switch of short circuit current, cost is lower, and reliability can improve.Same Name of Ends contrary close coupling double winding reactor can adopt hollow, iron core or half core structure, composite type rapid closing switch can adopt in mechanical switch K, thyristor T, controlled triggered gap G and several switchgear of lightning arrester MOV one or more groups compose in parallel.
Figure 7 shows that the fault current limiter topological circuit figure of embodiment 2 based on composite type rapid closing switch.The embodiment of the present invention 2 is made up of Same Name of Ends identical close coupling double winding reactor, capacitor C and composite type rapid closing switch, described composite type rapid closing switch is made up of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch, and two groups of Same Name of Ends contrary close coupling double winding reactors are connected in series.Identical with embodiment 1, the self-induction of the contrary close coupling double winding of the Same Name of Ends in composite type rapid closing switch reactor two winding L 1 and L2 is respectively L
1and L
2, mutual inductance is M.Because the double winding number of turn is identical, Same Name of Ends is contrary, therefore L
1=L
2, mutual inductance M and L
1and L
2closely.First winding L 1 elder generation of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch series connection, and then the second winding L 2 of close coupling double winding reactor contrary to Same Name of Ends is in parallel; As different from Example 1: the first branch road L21 of described Same Name of Ends identical close coupling double winding reactor and the series connection of composite type rapid closing switch, the second branch road L22 and capacitor C in series of Same Name of Ends identical close coupling double winding reactor.When network system is normally run, the reactance value L '=L of composite type rapid closing switch
2, L ' can be made to be a very large value by appropriate design, such electric current is mainly from the second branch road L of Same Name of Ends identical close coupling double winding reactor
22flow through with in the series resonance branch road of C composition, very little on network system impact; When network system breaks down short circuit, the reactance of composite type rapid closing switch becomes
it is a very little reactance value; Fault current transfers to composite type rapid closing switch branch road from capacitor C branch road, the impedance of flow restricter increases and suppresses short circuit current, and the short circuit current that rapid closing switch passes through is lower, like this can with the lower rapid closing switch of short circuit current, cost reduces, and reliability can improve.Same Name of Ends identical close coupling double winding reactor close coupling double winding contrary to Same Name of Ends reactor all can adopt hollow, iron core or half core structure, composite type rapid closing switch can adopt in mechanical switch K, thyristor T, controlled triggered gap G and several switchgear of lightning arrester MOV one or more groups compose in parallel.
As shown in Figure 8, the embodiment of the present invention 3 is the fault current limiter based on two-level concatenation textural association formula rapid closing switch.The embodiment of the present invention 3 is made up of conventional reactor L, capacitor C and composite type rapid closing switch, described composite type rapid closing switch is made up of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch, and two groups of Same Name of Ends contrary close coupling double winding reactors adopt two-level concatenation structure.In composite type rapid closing switch, the self-induction of first order Same Name of Ends contrary close coupling double winding reactor two winding L 1 and L2 is respectively L
1and L
2, mutual inductance is M, L
1=L
2; Structure close coupling double winding contrary to the first order Same Name of Ends reactor of second level Same Name of Ends contrary close coupling double winding reactor is similar, and the first winding L 11 of second level Same Name of Ends contrary close coupling double winding reactor and the mutual inductance of the second winding L 12 are M
1, self-induction L
11=L
12; First winding L 11 elder generation of second level Same Name of Ends contrary close coupling double winding reactor and rapid closing switch series connection, and then the second winding L 12 of close coupling double winding reactor contrary to second level Same Name of Ends is in parallel; First winding L 1 of second level Same Name of Ends contrary close coupling double winding reactor close coupling double winding contrary to first order Same Name of Ends reactor is connected, and then the second winding L 2 of close coupling double winding reactor contrary to first order Same Name of Ends is in parallel.Connect with conventional reactor L again after the composite type rapid closing switch parallel connection of capacitor C and two-level concatenation structure.The reactance value of composite type rapid closing switch when normal work
by appropriate design L
1and L
2, L
12and L
22numerical value, L ' can be made to be a very large value, such electric current mainly from L and C composition series resonant circuit flow through, on network system impact very little; When network system breaks down short circuit, the reactance of composite type rapid closing switch becomes
it is a very little reactance value; Fault current transfers to composite type rapid closing switch branch road from capacitor C branch road, the impedance of flow restricter increases and suppresses short circuit current, the short circuit current that rapid closing switch passes through can more reduce, like this can with the lower rapid closing switch of short circuit current, cost reduces, and reliability can improve.First order Same Name of Ends contrary close coupling double winding reactor close coupling double winding contrary to second level Same Name of Ends reactor all can adopt hollow, iron core or half core structure, composite type rapid closing switch can adopt in mechanical switch K, thyristor T, controlled triggered gap G and several switchgear of lightning arrester MOV one or more groups compose in parallel.It should be noted that, the present embodiment may extend to the form of two-stage above composite type rapid closing switch cascade, and the electric current that such rapid closing switch bears is lower.
As shown in Figure 9, the embodiment of the present invention 4 is the another kind of fault current limiter based on two-level concatenation textural association formula rapid closing switch.The embodiment of the present invention 4 is made up of Same Name of Ends identical close coupling double winding reactor, capacitor C and composite type rapid closing switch, described composite type rapid closing switch is made up of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch, and two groups of Same Name of Ends contrary close coupling double winding reactors adopt two-level concatenation structure.In composite type rapid closing switch, identical with embodiment 3: the self-induction of first order Same Name of Ends contrary close coupling double winding reactor two winding L 1 and L2 is respectively L
1and L
2, mutual inductance is M, L
1=L
2; Structure close coupling double winding contrary to the first order Same Name of Ends reactor of second level Same Name of Ends contrary close coupling double winding reactor is similar; First winding L 11 of second level Same Name of Ends contrary close coupling double winding reactor and the mutual inductance of the second winding L 12 are M
1, self-induction L
11=L
12; First winding L 11 elder generation of second level Same Name of Ends contrary close coupling double winding reactor and rapid closing switch series connection, and then the second winding L 12 of close coupling double winding reactor contrary to second level Same Name of Ends is in parallel; First winding L 1 of second level Same Name of Ends contrary close coupling double winding reactor close coupling double winding contrary to first order Same Name of Ends reactor is connected, and then the second winding L 2 of close coupling double winding reactor contrary to first order Same Name of Ends is in parallel.As different from Example 3: a branch road L21 of described Same Name of Ends identical close coupling double winding reactor and the composite type rapid closing switch series connection of two-level concatenation structure, another branch road L22 of Same Name of Ends identical close coupling double winding reactor and capacitor C in series.The reactance value of composite type rapid closing switch when normal work
by appropriate design L
1and L
2, L
12and L
22numerical value, L ' can be made to be a very large value, and such electric current is mainly from the second branch road L of Same Name of Ends identical close coupling double winding reactor
22flow through with in the series resonant circuit of C composition, very little on network system impact; When network system breaks down short circuit, the reactance of composite type rapid closing switch becomes
it is a very little reactance value; Fault current transfers to composite type rapid closing switch branch road from capacitor C branch road, the impedance of flow restricter increases and suppresses short circuit current, and the short circuit current that rapid closing switch passes through is lower, like this can with the lower rapid closing switch of short circuit current, cost reduces, and reliability can improve.The one-level close coupling double winding reactor that Same Name of Ends is contrary and secondary close coupling double winding reactor, and the identical close coupling double winding reactor of Same Name of Ends all can adopt hollow, iron core or half core structure, composite type rapid closing switch can adopt in mechanical switch K, thyristor T, controlled triggered gap G and several switchgear of lightning arrester MOV one or more groups compose in parallel.
As shown in Figure 10, the embodiment of the present invention 5 is a kind of fault current limiter based on two groups of cascaded structure composite type rapid closing switchs.The embodiment of the present invention 5 is made up of conventional reactor L, capacitor C and composite type rapid closing switch, described composite type rapid closing switch is made up of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch, and two groups of composite type rapid closing switchs adopt cascaded structure.Identical with embodiment 3: two winding L 1 of first group of Same Name of Ends contrary close coupling double winding reactor 1 and the self-induction of L2 are respectively L
1and L
2, mutual inductance is M, L
1=L
2; The structure of second group of Same Name of Ends contrary close coupling double winding reactor 2 is similar with first group of Same Name of Ends contrary close coupling double winding reactor 1; First winding L 11 of second group of Same Name of Ends contrary close coupling double winding reactor 2 and the mutual inductance of the second winding L 12 are M
1, self-induction L
11=L
12; First winding L 1 elder generation of first group of Same Name of Ends contrary close coupling double winding reactor 1 and the first rapid closing switch 1 are connected, and then in parallel with the second winding L 2 of first group of Same Name of Ends contrary close coupling double winding reactor 1; First winding L 11 elder generation of second group of Same Name of Ends contrary close coupling double winding reactor 2 and the second rapid closing switch 2 are connected, and then in parallel with the second winding L 12 of second group of Same Name of Ends contrary close coupling double winding reactor.As different from Example 3: two groups of composite type rapid closing switchs do not adopt cascade system and adopt series system, two groups of composite type rapid closing switchs are connected afterwards and capacitor C parallel connection.The reactance value L '=L of composite type rapid closing switch when normal work
1+ L
11, by appropriate design L
1and L
2, L
12and L
22numerical value, L ' can be made to be a very large value, such electric current mainly from L and C composition series resonance branch road flow through, on network system impact very little; When network system breaks down short circuit, the reactance of composite type rapid closing switch becomes
it is a very little reactance value; Fault current transfers to composite type rapid closing switch branch road from capacitor C branch road, the impedance of flow restricter increases and suppresses short circuit current, and the short circuit current that rapid closing switch passes through is lower, like this can with the lower rapid closing switch of short circuit current, cost reduces, and reliability can improve.In addition, owing to adopting two groups of composite type rapid closing switch cascaded structures, the voltage often organizing Quick-action type closing switch also can reduce.First group of Same Name of Ends contrary close coupling double winding reactor 1 and second group of Same Name of Ends contrary close coupling double winding reactor 2 all adopt hollow, iron core or half core structure, first rapid closing switch 1 can adopt in mechanical switch K1, thyristor T1, controlled triggered gap G1 and several switchgear of lightning arrester MOV1 one or more groups compose in parallel, the second rapid closing switch 2 also can adopt mechanical switch K2, thyristor T2, controlled triggered gap G2 and several switchgear of lightning arrester MOV2 one or more groups compose in parallel.It should be noted that, the present embodiment may extend to the form of composite type rapid closing switch more than two series connection, and the voltage that bears of each group composite type rapid closing switch is lower like this.
As shown in figure 11, the embodiment of the present invention 6 is the another kind of fault current limiter based on two groups of cascaded structure composite type rapid closing switchs.Example 6 of the present invention is made up of Same Name of Ends identical close coupling double winding reactor, capacitor C and composite type rapid closing switch, described composite type rapid closing switch is made up of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch, and two groups of composite type rapid closing switchs adopt cascaded structure.In composite type rapid closing switch, identical with embodiment 5: two winding L 1 of first group of Same Name of Ends contrary close coupling double winding reactor 1 and the self-induction of L2 are respectively L
1and L
2, mutual inductance is M, L
1=L
2; The structure of second group of Same Name of Ends contrary close coupling double winding reactor 2 is similar with first group of Same Name of Ends contrary close coupling double winding reactor 1; First winding L 11 of second group of Same Name of Ends contrary close coupling double winding reactor 2 and the mutual inductance of the second winding L 12 are M
1, self-induction L
11=L
12; First winding L 1 elder generation of first group of Same Name of Ends contrary close coupling double winding reactor 1 and the first rapid closing switch 1 are connected, and then in parallel with the second winding L 2 of first group of Same Name of Ends contrary close coupling double winding reactor 1; First winding L 11 of second group of Same Name of Ends contrary close coupling double winding reactor 2 first and with the second rapid closing switch 2 is connected, and then in parallel with the second winding L 12 of second group of Same Name of Ends contrary close coupling double winding reactor 2.As different from Example 5: a branch road L21 of described Same Name of Ends identical close coupling double winding reactor and two groups of composite type rapid closing switch series connection of cascaded structure, another branch road L22 of Same Name of Ends identical close coupling double winding reactor and capacitor C in series.The reactance value L '=L of two groups of composite type rapid closing switchs when normal work
1+ L
11, by appropriate design L
1and L
2, L
12and L
22numerical value, L ' can be made to be a very large value, and such electric current is mainly from the second branch road L of Same Name of Ends identical close coupling double winding reactor
22flow through with in the series resonant circuit of C composition, very little on network system impact; When network system breaks down short circuit, the reactance of two groups of composite type rapid closing switchs becomes
it is a very little reactance value; Fault current transfers to composite type rapid closing switch branch road from capacitor C branch road, the impedance of flow restricter increases and suppresses short circuit current, and the short circuit current that rapid closing switch passes through is lower, like this can with the lower rapid closing switch of short circuit current, cost reduces, and reliability can improve.In addition, owing to adopting two groups of composite type rapid closing switch cascaded structures, the withstand voltage often organizing Quick-action type closing switch also can reduce.First group of Same Name of Ends contrary close coupling double winding reactor 1 and second group of Same Name of Ends contrary close coupling double winding reactor 2 all adopt hollow, iron core or half core structure, first rapid closing switch 1 can adopt in mechanical switch K1, thyristor T1, controlled triggered gap G1 and several switchgear of lightning arrester MOV1 one or more groups compose in parallel, the second rapid closing switch 2 also can adopt mechanical switch K2, thyristor T2, controlled triggered gap G2 and several switchgear of lightning arrester MOV2 one or more groups compose in parallel.It should be noted that, the present embodiment also may extend to the pattern of composite type rapid closing switch more than two series connection, and the voltage that bears of each group composite type rapid closing switch is lower like this.
Claims (3)
1. based on a fault current limiter for composite type rapid closing switch, it is characterized in that, described fault current limiter is made up of conventional reactor or the identical close coupling reactor of Same Name of Ends, capacitor C and composite type rapid closing switch; Described composite type rapid closing switch is connected with conventional reactor L with the first parallel connection of capacitor C again, or a branch road L21 of Same Name of Ends identical close coupling double winding reactor connects with composite type rapid closing switch, another branch road L22 of Same Name of Ends identical close coupling double winding reactor and capacitor C in series; Described composite type rapid closing switch is made up of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch; Described Same Name of Ends identical close coupling double winding reactor is made up of the hollow of the first winding, the second winding and rectangle, closed or semi-closed iron core, first winding of described Same Name of Ends identical close coupling double winding reactor is identical with the number of turn of the second winding, is wound on stem stem with parallel way; The Same Name of Ends contrary close coupling double winding reactor of the composite type rapid closing switch described in composition is made up of the hollow of the first winding, the second winding and rectangle, closed or semi-closed iron core, first winding of described Same Name of Ends contrary close coupling double winding reactor is identical with the number of turn of the second winding, is wound on stem stem in inverse parallel mode; Described fault current limiter is connected in network system; Described composite type rapid closing switch is combined by the contrary close coupling double winding reactor of Same Name of Ends and rapid closing switch, first winding L 1 elder generation of the close coupling double winding reactor that described Same Name of Ends is contrary and rapid closing switch series connection, then with the second winding L 2 is in parallel; Described rapid closing switch is composed in parallel by one or more groups in mechanical switch K, thyristor T, controlled triggered gap G and lightning arrester MOV; When short trouble, described rapid closing switch realizes the combined floodgate to contrary close coupling double winding reactor first winding L 1 of described Same Name of Ends; After close coupling double winding reactor first winding L 1 that Same Name of Ends is contrary is connected, the reactance that the first winding L 1 of the close coupling double winding reactor that Same Name of Ends is contrary and the second winding L 2 produce cancels each other, and total reactance reduces.
2. based on a fault current limiter for composite type rapid closing switch, it is characterized in that, described fault current limiter is made up of conventional reactor or the identical close coupling reactor of Same Name of Ends, capacitor C and composite type rapid closing switch; Described composite type rapid closing switch is connected with conventional reactor L with the first parallel connection of capacitor C again, or a branch road L21 of Same Name of Ends identical close coupling double winding reactor connects with composite type rapid closing switch, another branch road L22 of Same Name of Ends identical close coupling double winding reactor and capacitor C in series; Described composite type rapid closing switch is made up of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch; Described Same Name of Ends identical close coupling double winding reactor is made up of the hollow of the first winding, the second winding and rectangle, closed or semi-closed iron core, first winding of described Same Name of Ends identical close coupling double winding reactor is identical with the number of turn of the second winding, is wound on stem stem with parallel way; The Same Name of Ends contrary close coupling double winding reactor of the composite type rapid closing switch described in composition is made up of the hollow of the first winding, the second winding and rectangle, closed or semi-closed iron core, first winding of described Same Name of Ends contrary close coupling double winding reactor is identical with the number of turn of the second winding, is wound on stem stem in inverse parallel mode; Described fault current limiter is connected in network system; In described composite type rapid closing switch, the close coupling double winding reactor that Same Name of Ends is contrary adopts two-level concatenation mode to connect, first winding L 11 and the rapid closing switch of secondary close coupling double winding reactor are first connected, then the first winding L 11 of described secondary close coupling double winding reactor and the second winding L 12 in parallel; Described secondary close coupling double winding reactor is connected with the first winding L 1 of one-level close coupling double winding reactor, then carries out parallel connection with the second winding L 2 of one-level close coupling double winding reactor; Described rapid closing switch is composed in parallel by one or more groups in mechanical switch K, thyristor T, controlled triggered gap G and lightning arrester MOV; When short trouble, rapid closing switch realizes the combined floodgate to secondary close coupling double winding reactor first winding L 11; After the first winding L 11 conducting of secondary close coupling double winding reactor, the reactance that one-level close coupling double winding and each branch road winding of secondary close coupling double winding reactor produce cancels each other, and total reactance reduces.
3. based on a fault current limiter for composite type rapid closing switch, it is characterized in that, described fault current limiter is made up of conventional reactor or the identical close coupling reactor of Same Name of Ends, capacitor C and composite type rapid closing switch; Described composite type rapid closing switch is connected with conventional reactor L with the first parallel connection of capacitor C again, or a branch road L21 of Same Name of Ends identical close coupling double winding reactor connects with composite type rapid closing switch, another branch road L22 of Same Name of Ends identical close coupling double winding reactor and capacitor C in series; Described composite type rapid closing switch is made up of Same Name of Ends contrary close coupling double winding reactor and rapid closing switch; Described Same Name of Ends identical close coupling double winding reactor is made up of the hollow of the first winding, the second winding and rectangle, closed or semi-closed iron core, first winding of described Same Name of Ends identical close coupling double winding reactor is identical with the number of turn of the second winding, is wound on stem stem with parallel way; The Same Name of Ends contrary close coupling double winding reactor of the composite type rapid closing switch described in composition is made up of the hollow of the first winding, the second winding and rectangle, closed or semi-closed iron core, first winding of described Same Name of Ends contrary close coupling double winding reactor is identical with the number of turn of the second winding, is wound on stem stem in inverse parallel mode; Described fault current limiter is connected in network system; In described composite type rapid closing switch, the close coupling double winding reactor that Same Name of Ends is contrary adopts two groups of cascaded structures; First winding L 1 elder generation of first group of close coupling double winding reactor and the series connection of the first rapid closing switch, and then in parallel with the second winding L 2 of first group of close coupling double winding reactor; First winding L 11 elder generation of second group of close coupling double winding reactor and the series connection of the second rapid closing switch, and then in parallel with the second winding L 12 of second group of close coupling double winding reactor; The first described rapid closing switch is composed in parallel by one or more groups in mechanical switch K1, thyristor T1, controlled triggered gap G1 and lightning arrester MOV1, and the second rapid closing switch is composed in parallel by one or more groups in mechanical switch K2, thyristor T2, controlled triggered gap G2 and lightning arrester MOV2; When short trouble, rapid closing switch realizes the combined floodgate to first group of close coupling double winding reactor first winding L 1 and second group of close coupling double winding reactor first winding L 11; After first group of close coupling double winding reactor first winding L 1 and second group of equal conducting of close coupling double winding reactor first winding L 11, the reactance of two groups of each branch road winding generations of reactor cancels each other, and total reactance reduces.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310007027.9A CN103078306B (en) | 2013-01-09 | 2013-01-09 | Fault current limiter on basis of combined rapid switch-on switch |
| PCT/CN2013/089000 WO2014108010A1 (en) | 2013-01-09 | 2013-12-10 | Fault current limiter based on combined quick switching switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310007027.9A CN103078306B (en) | 2013-01-09 | 2013-01-09 | Fault current limiter on basis of combined rapid switch-on switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103078306A CN103078306A (en) | 2013-05-01 |
| CN103078306B true CN103078306B (en) | 2015-01-21 |
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ID=48154755
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310007027.9A Expired - Fee Related CN103078306B (en) | 2013-01-09 | 2013-01-09 | Fault current limiter on basis of combined rapid switch-on switch |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103078306B (en) |
| WO (1) | WO2014108010A1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103078306B (en) * | 2013-01-09 | 2015-01-21 | 中国科学院电工研究所 | Fault current limiter on basis of combined rapid switch-on switch |
| CN103956719B (en) * | 2014-03-26 | 2017-04-05 | 中国科学院电工研究所 | A kind of column combined type superconduction resistance sense type current limiter |
| CN103887782B (en) * | 2014-04-11 | 2017-09-22 | 武汉大学 | A kind of mixed type magnetic flux Coupled Superconducting fault current limiter and current-limiting method |
| CN104134979B (en) * | 2014-07-18 | 2017-02-15 | 中国科学院电工研究所 | Resonant superconducting short-circuit fault current limiter |
| CN104377695B (en) * | 2014-11-20 | 2017-11-14 | 清华大学 | A kind of compensator with series capaci tance, power delivery circuit and the method for suppressing TRV |
| US10177557B2 (en) * | 2015-06-12 | 2019-01-08 | Abb Schweiz Ag | Passive electronic fuse for protecting a DC application |
| US10447031B2 (en) * | 2016-10-31 | 2019-10-15 | Varian Semiconductor Equipment Associates, Inc. | Fault current limiter with modular mutual reactor |
| CN107248730B (en) * | 2017-08-14 | 2020-04-03 | 广东电网有限责任公司电力科学研究院 | Short-circuit protection circuit of flexible direct current transmission system |
| CN107863765B (en) * | 2017-11-06 | 2019-07-09 | 山东大学 | Improve arc current transfevent AC fault current limiter and current-limiting method |
| CN108092250B (en) * | 2017-12-20 | 2023-05-12 | 南京南瑞继保电气有限公司 | Fault current limiting equipment and control method |
| CN108767833A (en) * | 2018-07-27 | 2018-11-06 | 国电南瑞科技股份有限公司 | Single-phase magneto-restrictive fault current limiter |
| CN111541230B (en) * | 2020-04-20 | 2022-04-19 | 国网新疆电力有限公司塔城供电公司 | Inrush current overvoltage treatment device and method |
| CN111525501B (en) * | 2020-05-28 | 2022-05-27 | 中国科学院电工研究所 | Modularized high-capacity current-limiting circuit breaker |
| CN112366668B (en) * | 2020-11-16 | 2022-08-09 | 中国科学院电工研究所 | Low-loss split reactance type current-limiting circuit breaker |
| CN112952783B (en) * | 2021-02-04 | 2022-08-09 | 中国科学院电工研究所 | Alternating current short circuit fault current limiter |
| CN113224739B (en) * | 2021-04-19 | 2024-02-09 | 国网江苏省电力有限公司检修分公司 | Current limiting device for grounding time of grounding wire of synchronous camera |
| CN117240183A (en) * | 2023-08-11 | 2023-12-15 | 安徽合凯电气科技股份有限公司 | Voltage sag prevention device for large motor |
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| US4158864A (en) * | 1977-07-05 | 1979-06-19 | Electric Power Research Institute, Inc. | Fault current limiter |
| JPS5957524A (en) * | 1982-09-25 | 1984-04-03 | Mitsubishi Electric Corp | Ac current limiting type semiconductor circuit breaker |
| CN2674738Y (en) * | 2004-02-19 | 2005-01-26 | 山东大学 | Fault current limiter |
| CN101982916A (en) * | 2010-11-29 | 2011-03-02 | 山东电力研究院 | Fault current limiter |
| CN201887453U (en) * | 2010-11-29 | 2011-06-29 | 山东电力研究院 | Fault current limiter |
| CN102231515B (en) * | 2011-07-11 | 2013-11-13 | 中电普瑞科技有限公司 | Control protection method, device and system for series capacitor device |
| CN102646968B (en) * | 2012-05-04 | 2015-03-18 | 中国科学院电工研究所 | Reactor type short-circuit fault current limiter |
| CN102790382B (en) * | 2012-07-19 | 2014-12-24 | 中国科学院电工研究所 | Current limited soft connecting/disconnecting device |
| CN103078306B (en) * | 2013-01-09 | 2015-01-21 | 中国科学院电工研究所 | Fault current limiter on basis of combined rapid switch-on switch |
-
2013
- 2013-01-09 CN CN201310007027.9A patent/CN103078306B/en not_active Expired - Fee Related
- 2013-12-10 WO PCT/CN2013/089000 patent/WO2014108010A1/en active Application Filing
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| Publication number | Publication date |
|---|---|
| WO2014108010A1 (en) | 2014-07-17 |
| CN103078306A (en) | 2013-05-01 |
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