CN101335455B - Dynamic reactive compensator - Google Patents
Dynamic reactive compensator Download PDFInfo
- Publication number
- CN101335455B CN101335455B CN2008101310601A CN200810131060A CN101335455B CN 101335455 B CN101335455 B CN 101335455B CN 2008101310601 A CN2008101310601 A CN 2008101310601A CN 200810131060 A CN200810131060 A CN 200810131060A CN 101335455 B CN101335455 B CN 101335455B
- Authority
- CN
- China
- Prior art keywords
- circuit
- signal
- high voltage
- phase
- compensation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The invention discloses a dynamic reactive power compensation device which is applied to the field of electric power systems, in particular to the traction substation of the electrified railway. The dynamic reactive power compensation device of the invention comprises a control device, a high-voltage switch device, a signal detection device and a compensation device, wherein, one end of the high-voltage switch device is connected with the secondary winding of a corresponding phase of a transformer while the other end is connected with the compensation device; the signal detection device is connected with the secondary winding of the corresponding phase of the transformer so as to detect the voltage signals and the current signals of an M phase and a T phase in a real-time way; the control device is connected with a main circuit and calculates the reactive values of the M phase and the T phase in a real-time manner according to the voltage signals and the current signals detected by the signal detection device and also determines the reactive values which need to be compensated to realize the dynamic switching to each compensation branch circuit of the compensation device by triggering a high-voltage large power switch of each compensation branch circuit. By applying the invention, the dynamic reactive power compensation device can be switched in a real-time way with the fast change of the load power factor, thus effectively filtering harmonic waves in a power grid and further improving the quality of electric energy.
Description
Technical field
The present invention relates to a kind of reactive power compensator that is applied to field of power, especially a kind of dynamic reactive compensation device that is applied to electric railway traction transformer station.
Background technology
In China, railway transportation is flourish, and the construction of electric railway enlarges rapidly.Therefore,, solve net and press and fall, improve traction net power supply capacity, suppress mains by harmonics, improve the quality of power supply and become railway territory technical problem anxious to be solved in recent years for the needs of the sustainable development of satisfying freight volume and running speed better.At present, the reactive power compensator that generally uses at the China railways electric field mainly is traditional reactive power compensator of two kinds of forms.A kind of is the static passive compensation device that adopts the mechanical switch switching, i.e. the form of FC (fixed compensation capacitor device), and its electrical schematic diagram is as shown in Figure 1.Wherein reactive power compensator be connected on transformer M mutually with T mutually on the secondary winding, for fixed compensation capacitor device group, comprise isolating switch QS, QS ', circuit breaker Q F, QF ', high-voltage parallel capacitor CF, CF ', series reactor LF, LF '.Because this static passive compensation device adopts the mode of mechanical switch switching, so the one, can not be along with the quick variation of the power-factor of load real-time switching, the 2nd, the combination of multiple compensation capacity can not be set, can not make the ascending quick variation of load can both reach optimum power factor, the 3rd, when dropping into, compensation arrangement can in electrical network, produce very big shoving, when excising, compensation arrangement produces overvoltage.So, just had a strong impact on the useful life of mechanical switch and compensation arrangement.
The another kind of reactive power compensator of using at present is follow-on static passive compensation device, it is SVC (static var compensator) form, also be called TCR (triac controller reactor)+FC form, its electrical schematic diagram as shown in Figure 2, high-pressure installation and reactive power compensation branch road be connected on transformer M mutually with T mutually on the secondary winding, wherein high-pressure installation comprises: isolating switch QS1, QS1 ', circuit breaker comprises QF1, QF1 ', reactive power compensator comprises FC (FC ') and two branch roads of TCR (TCR '), FC wherein, FC ' branch road comprises: isolating switch QS1, QS1 ', current transformer TA1, TA1 ', high-voltage parallel capacitor CF, CF ', series reactor LF, LF '.TCR, TCR ' branch road comprise: isolating switch QS2, QS2 ', current transformer TA2, TA2 ', shunt reactor L11, L12, L11 ', L12 ', high-pressure thyristor valve group SCR1, SCR1 '.Therefore this follow-on reactive power compensator has had the better dynamic compensation performance owing to adopted triac controller reactor (TCR).But this reactive power compensator response speed is slower, fluctuation to line voltage shows the constant-impedance characteristic, when voltage ripple of power network, not only can not give full play to its effect, and self can produce more harmonic current injection electrical network, need huge energy storage device (as: electric capacity and reactance) to realize the purpose of reactive power compensation simultaneously.In addition, it is idle that this reactive power compensator can only produce hysteresis (perception) for idle adjusting, and adjustable range is very limited, and the cost height, takes up an area of big.
Summary of the invention
Technical problem to be solved by this invention provides a kind of dynamic reactive compensation device that adopts high voltage switch device switched capacitor.By implementing the present invention, can make reactive power compensator along with the quick variation of the power-factor of load switching in real time, simultaneously by introducing the dynamic reactive compensation device of a plurality of branch combinations, the harmonic wave in the filtering electrical network effectively further improves the quality of electric energy.
According to the present invention, above-mentioned technical problem is achieved through the following technical solutions:
A kind of dynamic reactive compensation device; this dynamic reactive compensation device comprises main circuit and control device; main circuit comprises high voltage switchgear; signal supervisory instrument; the high voltage switch device switching capacitance type compensation arrangement that n branch road arranged, n 〉=1 wherein, high voltage switchgear one end is connected on the secondary winding of the corresponding phase of transformer; one end links to each other with high voltage switch device switching capacitance type compensation arrangement, and described high voltage switchgear is used to carry out error protection.Signal supervisory instrument is connected on the secondary winding of the corresponding phase of transformer, is used for detecting in real time M phase and T voltage signal and current signal mutually; Control device links to each other with main circuit, the voltage and current signal that is used for recording according to signal supervisory instrument calculates M phase and T idle amount mutually in real time, determine the idle amount of needs compensation according to the real-time idle amount that calculates, by triggering the high voltage switch device that respectively compensates branch road, realize high voltage switch device switching capacitance type compensation arrangement is respectively compensated the dynamic switching of branch road.
Its switching order is according to the calculating of following formula is sent:
Q
LM＝U
MI
M?sinα (1)
Q
LT＝U
TI
T?sinβ (2)
Wherein, Q
LMBe the idle amount that M calculates mutually in real time, Q
LTBe the idle amount that T calculates mutually in real time, U
MBe M phase voltage effective value, U
TBe T phase voltage effective value, I
MBe M phase current effective value, I
TFor T phase current effective value, α are the angle between M phase current and the voltage, β is the angle between T phase current and the voltage, Q
TiBe the compensation capacity of M phase i bar compensation branch road, Q
Ti' be the T compensation capacity of i bar compensation branch road mutually, the way of k for dropping into.
Signal supervisory instrument comprises M phase and T phase current voltage check device, is used for finishing M phase and T phase voltage U
T, U
M, electric current I
T, I
MDetection, control device is finished the calculating of M phase, the mutually real-time idle amount of T and is needed determining of compensating reactive power amount, its computational methods are provided by above-mentioned formula (1) and formula (2).Dynamic reactive compensation device detect in real time with calculate M mutually with T idle amount mutually, draw the idle amount that needs compensation, by high voltage switch device switching capacitance type compensation arrangement respectively being compensated the real-time switching of high voltage switch device of branch road, idle amount in the dynamic compensation electric power system in real time, thus make system reach optimum power factor.Drop into k branch road and make compensating reactive power amount the best, drop into k+1 and pass by benefit.No matter how load changes,, and have the effect of filtering harmonic wave concurrently like this always system keeps optimum power factor.So that being compensated mutually, M is example, if
(being that M needs the idle amount that the compensates total amount greater than the compensation of dynamic reactive compensation device k bar branch road mutually) illustrate M phase undercompensation, and control device calculates also judges the next branch road of input; If
(being that M needs the idle amount that the compensates total amount less than the compensation of dynamic reactive compensation device k bar branch road mutually) illustrate the overcompensation of M phase, and control device calculates also to be judged and excise a branch road.If
Illustrate that then M reaches desirable The optimal compensation state mutually.Dynamic reactive compensation device is identical to the switching control principle of T phase with M mutually.
As further execution mode, the real-time idle amount that dynamic reactive compensation device root a tree name calculates with set in advance given idle amount and compare, need to determine the idle amount of compensation, and send the switching order, these set in advance given idle amount and are best reactive power compensation amount.Wherein, set in advance given reactive power compensation amount and be equal to or slightly less than actual idle amount, all do not occur the overcompensation phenomenon mutually with T mutually to guarantee M by calculating in real time.In addition, the compensation capacity of each compensation branch road of high voltage switch device switching capacitance type compensation arrangement all is specified, and the basis of calculation of its compensation capacity is to detect the idle amount of load obtain or type, driving number, the rate of traffic flow of locomotive obtains according to long-term load.
In a kind of exemplary embodiment of the present invention, checkout gear is current transformer and voltage transformer, and current transformer is used to detect phase current, and voltage transformer is used to detect phase voltage.High voltage switchgear comprises: isolating switch and circuit breaker.High voltage switch device switching capacitance type compensation arrangement comprises the compensating element, combinational circuit, and the high voltage switch assembly circuit.The compensating element, combinational circuit further comprises isolating switch, high-voltage parallel capacitor and series reactor; The high voltage switch assembly circuit further comprises the high voltage switch device.
As further execution mode, in order to reach optimum power factor (The optimal compensation just), the total capacity of high voltage switch device switching capacitance type compensation arrangement reaches when being respectively maximum load mutually by M phase or T needs the maximum reactive capability of compensation to choose.According to the load variations situation, high voltage switch device switching capacitance type compensation arrangement reasonably is divided into the combination of a plurality of branch roads, can select to be divided into 2 branch roads, 3 branch roads, and 4 branch roads, perhaps the individual more multiple branch circuit of 5 branch roads and n can certainly be single branch road.Each branch road is according to the harmonic content characteristics of load, and high voltage switch device switching capacitance type compensation arrangement is configured to filter 3 times, 5 times, 7 times, 11 times, 13 times, and common 3 subharmonic are the most serious in general electric power system.Control device then respectively compensates branch road according to the real-time switching of idle amount (with load variations) of system's needs compensation.
As a kind of better embodiment, leave tap on the secondary winding mutually with T mutually at the M of substation transformer, high voltage switchgear and high voltage switch device switching capacitance type compensation arrangement series arm are connected in its tap.Do like this and can further reduce high voltage switchgear and high voltage switch device switching capacitance type compensation arrangement, comprise the requirement of withstand voltage of high-voltage parallel capacitor, series reactor, high voltage switch apparatus assembly etc.Load is idle because dynamic reactive compensation device is local compensation, and load absorbs idle from high voltage switch device switching capacitance type compensation arrangement, and need not absorb from electric power system idle, so need not increase traction transformer capacity.
As another kind of better embodiment, sending throwing, cutting signal and go to trigger the formation of finishing voltage zero-cross lock-out pulse row when the high voltage switch device is finished dynamic switching, when voltage zero-cross, finish synchronous triggering, non-impact current when guaranteeing high voltage switch device switching capacitance type compensation arrangement input; When current over-zero, turn-off, do not have impulse overvoltage when making the excision of high voltage switch device switching capacitance type compensation arrangement.Dynamic reactive compensation device just can not produce in electric power system and shove the useful life of greatly having improved high voltage switchgear and high voltage switch device switching capacitance type compensation arrangement simultaneously like this.
Dynamic reactive compensation device described in the invention solved the conventional dynamic reactive power compensator can not be along with the quick variation of the power-factor of load technical problem of switching in real time, and when voltage zero-cross, drop into, do not produce to drop into and shove, when current over-zero, turn-off, do not produce overvoltage, greatly prolonged the useful life of dynamic reactive compensation device.Utilize turning on and off of thyristor just to realize the input and the excision of high voltage switch device switching capacitance type compensation arrangement,, improved the life-span of switchgear so do not need the action of switchgear.Simultaneously, the present invention does not need big capacity energy-storage reactor, and equipment itself does not produce harmonic wave, simultaneously can the filtering appts harmonic wave.Utilize control device to detect in real time, calculate in real time, according to the quick variation of the power-factor of load and carry out switching in real time, so just suppressed the harmonic wave in the electrical network well, improved the power supply capacity of electrical network, greatly improved the quality of electric energy, the problem that prior art exists has obtained effective solution.
Description of drawings
Fig. 1 is the electrical schematic diagram of prior art mechanical switch switching type static passive compensation device,
Fig. 2 is the electrical schematic diagram of prior art SVC type reactive power compensator,
Fig. 3 is the electrical schematic diagram of a kind of exemplary embodiment of dynamic reactive compensation device of the present invention,
Fig. 4 is the electrical schematic diagram of another exemplary embodiment of dynamic reactive compensation device of the present invention,
Fig. 5 overall structure block diagram of the present invention,
Fig. 6 is first control circuit part of the present invention and peripheral circuit block diagram,
Fig. 7 is second control circuit part of the present invention and peripheral circuit block diagram,
Fig. 8 is the performed flow chart of CPU1 of the present invention,
Fig. 9 is the performed flow chart of CPU2 of the present invention.
Wherein:
1-transformer 201-control device 301-M phase compensation arrangement 301 '-T phase compensation arrangement 401-M phase signals checkout gear 401 '-T phase signals checkout gear 2-M phase high-tension switch gear 2 '-T phase high-tension switch gear 3-M phase compensating element, combinational circuit 3 '-T phase compensating element, combinational circuit 4-M phase high voltage switch assembly circuit 4 '-T phase high voltage switch assembly 5-M phase signals transtation mission circuit 5 '-T phase signals transtation mission circuit 6-M phase signals receiving circuit 6 '-T phase signals receiving circuit 7-the first control module 8-the second control module 9-fault secure circuit 10-signal enters out circuit 11-dc source 12-485 communication interface 701-CPU1 702-CPLD 703-A/D converter 704-protection logical link 101-numeral I/O 102-signal conditioning circuit 801-CPU2 802-zero cross fired signal and produces link 803-spike train and form link 804-and block fast link
CF, CF ': high-voltage parallel capacitor
LF, LF ': series reactor
L11, L11 ', L12, L12 ': shunt reactor
SCR1-SCR1 ': high-pressure thyristor valve group
FC, FC ': fixed compensation capacitor device group
TCR, TCR ': thyristor-controlled reactor
TM: transformer
TV, TV ': voltage transformer
TA, TA ', TA1-TAn, TA1 '-TAn ': current transformer
QS, QS ', QS1-QSn, QS1 '-QSn ': isolating switch
QF, QF ': circuit breaker
C1-Cn, C1 '-Cn ': high-voltage parallel capacitor
L1-Ln, L1 '-Ln ': series reactor
R1-Rn: resistor
SCR1-SCRn, SCR1 '-SCRn ': high-pressure thyristor valve group
TSC1-TSCn, TSC1 '-TSCn ': thyristor switchable capacitor
Embodiment
Having provided a kind of concrete application of the present invention in the electric locomotive field in embodiment, is the application of dynamic reactive compensation device in electric railway traction transformer station described in the invention particularly.Certainly, the present invention also can be applied to other power transmission and distribution such as wind power generation, civilian power system and use electrical domain.
The present invention is described further below in conjunction with the drawings and specific embodiments.
A kind of exemplary embodiment as dynamic reactive compensating method of the present invention, dynamic reactive compensation device comprises main circuit and control device, main circuit comprises high voltage switchgear 2,2 ', signal supervisory instrument 401,401 ', the high voltage switch device switching capacitance type compensation arrangement 301 of n branch road is arranged, 301 ', n 〉=1 wherein.High voltage switchgear 2,2 ' one end is connected on the secondary winding of the corresponding phase of transformer, and an end connects and high voltage switch device switching capacitance type compensation arrangement 301,301 ' link to each other, high voltage switchgear 2,2 ' can be used for carrying out error protection.Signal supervisory instrument 401,401 ' be connected on the secondary winding of the corresponding phase of transformer is used for detecting in real time M phase and T voltage signal and current signal mutually; Control device 201 links to each other with main circuit, be used for according to signal supervisory instrument 401,401 ' voltage and current the signal that records calculates M mutually and T idle amount mutually in real time, determine the idle amount of needs compensation according to the real-time idle amount that calculates, by triggering the high voltage switch device that respectively compensates branch road, realization compensates the dynamic switching of branch road to high voltage switch device switching capacitance type compensation arrangement 301,301 ' respectively.In the present embodiment, high voltage switchgear comprises: isolating switch QS, QS ' and circuit breaker Q F, QF '.High voltage switch device switching capacitance type compensation arrangement comprise compensating element, combinational circuit 3,3 ', and high voltage switch assembly circuit 4,4 '.The compensating element, combinational circuit comprise M phase compensating element, combinational circuit 3 and T mutually compensating element, combinational circuit 3 ', circuit breaker Q F one end links to each other with isolating switch QS, compensating element, combinational circuit 3 is continuous mutually with M for the other end, a circuit breaker Q F ' end links to each other with isolating switch QS ', and the other end and T be compensating element, combinational circuit 3 ' link to each other mutually.The compensating element, combinational circuit further comprises isolating switch QS1-QSn, QS1 '-QSn ', high-voltage parallel capacitor C1-Cn, C1 '-Cn ' and series reactor L1-Ln, L1 '-Ln ', can further include in the compensating element, combinational circuit resistance R 1-Rn and resistance R 1 '-Rn ' (not shown in the drawings R1 and R1 '); The high voltage switch assembly circuit further comprises the high voltage switch device, the high voltage switch device uses high-pressure thyristor valve group (SCR), certainly this high voltage switch device can also use devices such as GTO, IGBT and IGCT, and high voltage switch device switching capacitance type dynamic compensating device then is specially TSC (thyristor switchable capacitor) type dynamic reactive compensation device.
Its switching order is according to the calculating of following formula is sent:
Q
LM＝U
MI
M?sinα (1)
Q
LT＝U
TI
T?sinβ (2)
Wherein, Q
LMBe the idle amount that M calculates mutually in real time, Q
LTBe the idle amount that T calculates mutually in real time, U
MBe M phase voltage effective value, U
TBe T phase voltage effective value, I
MBe M phase current effective value, I
TFor T phase current effective value, α are the angle between M phase current and the voltage, β is the angle between T phase current and the voltage, Q
TiBe the compensation capacity of M phase i bar compensation branch road, Q
Ti' be the T compensation capacity of i bar compensation branch road mutually, the way of k for dropping into.
Signal supervisory instrument comprises M phase and T phase current detector TA and TA ', and voltage check device TV and TV ' are used for finishing M phase and T phase voltage U
T, U
M, electric current I
T, I
MDetection.In a kind of exemplary embodiment of the present invention, checkout gear is current transformer and voltage transformer, and current transformer is used to detect phase current, and voltage transformer is used to detect phase voltage.Control device is finished the calculating of M phase, the mutually real-time idle amount of T and is needed the definite of compensating reactive power amount, and its computational methods are provided by above-mentioned formula (1) and formula (2).Dynamic reactive compensation device detect in real time with calculate M mutually with T idle amount mutually, draw the idle amount that needs compensation, by high voltage switch device switching capacitance type compensation arrangement respectively being compensated the real-time switching of high voltage switch device of branch road, idle amount in the dynamic compensation electric power system in real time, thus make system reach optimum power factor.Drop into k branch road and make compensating reactive power amount the best, drop into k+1 and pass by benefit.No matter how load changes,, and have the effect of filtering harmonic wave concurrently like this always system keeps optimum power factor.So that being compensated mutually, M is example, if
(being that M needs the idle amount that the compensates total amount greater than the compensation of reactive power compensator k bar branch road mutually) illustrate M phase undercompensation, and control device calculates also judges the next branch road of input; If
(being that M needs the idle amount that the compensates total amount less than the compensation of reactive power compensator k bar branch road mutually) illustrate the overcompensation of M phase, and control device calculates also to be judged and excise a branch road.If
Illustrate that then M reaches desirable The optimal compensation state mutually.Dynamic reactive compensation device is identical to the switching control principle of T phase with M mutually.
As further execution mode, the real-time idle amount that dynamic reactive compensation device root a tree name calculates with set in advance given idle amount and compare, need to determine the idle amount of compensation, and send the switching order, these set in advance given idle amount and are best reactive power compensation amount.Wherein, set in advance given reactive power compensation amount and be equal to or slightly less than actual idle amount, all do not occur the overcompensation phenomenon mutually with T mutually to guarantee M by calculating in real time.In addition, the compensation capacity of each compensation branch road of high voltage switch device switching capacitance type compensation arrangement all is specified, and the basis of calculation of its compensation capacity is to detect the idle amount of load obtain or type, driving number, the rate of traffic flow of locomotive obtains according to long-term load.Here, the compensation capacity of each TSC dynamic compensation branch road all is specified, and the basis of calculation of its compensation capacity Q is to detect the idle amount of load obtain or type, driving number, the rate of traffic flow of locomotive obtains according to long-term load.Usually, compensation capacity is given by the following formula on circuit calculates, that is:
Wherein, Q is a compensation capacity, and U is the voltage of compensation branch road, X
CBe the capacitive reactance of compensation branch road, X
LInduction reactance for the compensation branch road.Respectively compensate the X of branch road by design
CAnd X
L, just can be met specific compensation capacity requirement each the compensation branch road.
As further execution mode, in order to reach optimum power factor (The optimal compensation just), high voltage switch device switching capacitance type compensation arrangement 301,301 ' total capacity by M mutually or T reach when being respectively maximum load mutually and need the maximum reactive capability of compensation to choose.According to the load variations situation, high voltage switch device switching capacitance type compensation arrangement 301,301 ' reasonably is divided into the combination of a plurality of branch roads, can select to be divided into 2 branch roads, 3 branch roads, 4 branch roads, perhaps the individual more multiple branch circuit of 5 branch roads and n can certainly be single branch road.Each branch road is according to the harmonic content characteristics of load, and compensation arrangement is configured to 3 times, 5 times, 7 times and high order (as 11,13 times) filter more, and common 3 subharmonic are the most serious in general electric power system.Control device then respectively compensates branch road according to the real-time switching of idle amount (with load variations) of system's needs compensation.Wherein, the number of times of filtering harmonic wave can change according to adjusting corresponding electric capacity of each branch road and inductance, just changes the resonance frequency of circuit.General the most serious in electric power system be 3 subharmonic.Do like this, make dynamic reactive compensation device also have the function of filtering harmonic wave, further improved the quality of power supply of electric power system.
In another embodiment of the invention as shown in Figure 4, M at substation transformer 1 leaves tap on the secondary winding mutually with T mutually, make the voltage of tapping point be reduced to a suitable voltage by original specified 27.5kV, as drop to 7kV, high voltage switchgear 2,2 ' and subsequently high voltage switch device switching capacitance type compensation arrangement 301,301 ' series arm be connected in its tap.Do like this and can further reduce switchgear and dynamic reactive compensation device, comprise the requirement of withstand voltage of high-voltage parallel capacitor, series reactor, high-pressure thyristor valve group SCR etc.Load is idle because dynamic reactive compensation device is local compensation, and load absorbs idle from dynamic reactive compensation device, and need not absorb idlely from electric power system, so need not increase transformer capacity, can reduce the volume of device therefor and reduces cost.Simultaneously, because the system voltage of tap has reduced, so can conveniently implement the combination of multiple branch circuit dynamic passive compensation.
As shown in Figure 5; provide a kind of embodiment of control device below; control device comprises: signal go into out circuit 10, first control unit 7, second control unit 8, fault secure circuit 9,485 communication circuit 12, signal sending circuit, signal receiving circuit,, and DC power supply 11.Wherein, signal sending circuit comprise M phase signals transtation mission circuit 5 and T phase signals transtation mission circuit 5 ', signal receiving circuit comprise M phase signals receiving circuit 6 and T phase signals receiving circuit 6 '.Signal is gone into out circuit 10 and signal supervisory instrument 401,401 ' link to each other, signal is gone into out circuit 10 and is comprised digital I/O101 and signal conditioning circuit 102 two parts, and the digital I/O 101 that signal is gone into out circuit 10 is used for the state input of external switch, switching order and the output of control logic; Signal conditioning circuit 102 is used for to M mutually and T voltage and current signal mutually, and the current signal that high voltage switch device switching capacitance type compensation arrangement 301,301 ' respectively compensates branch road amplifies, shaping and filtering.M mutually and T phase signals transtation mission circuit 5,5 ' with signal receiving circuit 6,6 ' between second control unit 8 and high voltage switch device switching capacitance type compensation arrangement 301,301 ' between, be used for transmitting control and state information.Control section specifically comprises first control unit 7 and second control unit 8 and the peripheral circuit thereof, and these two control units also can integrate certainly, and here should not be construed as is a kind of restriction to embodiment of the present invention.In the middle of present embodiment, control section is made up of the Digital Analog Hybrid Circuits that with two CPU is core.A slice CPU1 and peripheral circuit thereof are finished the signal (U that A/D converter 703 is sent here
M, U
T, I
M, I
T) sample and the calculating of real-time idle amount, idle amount that the root a tree name calculates and given idle amount compare, and send the switching order; Signal supervisory instrument 401; 401 ' further comprise M phase high voltage switch device switching capacitance type compensation arrangement 301 respectively compensate branch current instrument transformer TA1-TAn and T mutually high voltage switch device switching capacitance type compensation arrangement 301 ' respectively compensate branch current instrument transformer TA1 '-TAn '; be used for detecting the compensation branch current; the root a tree name detect obtain respectively compensate the branch current signal and given electric current compares, send guarded command protection.First control unit 7 may further include protection logical link 704, and protection logical link 704 is gone into out between the digital I/O 101 of circuit 10 at CPU1 701 and signal, is used for producing the protection logical signal.Another sheet CPU2 and peripheral circuit thereof are used for accepting throwing that first control unit 7 sends, cut signal, finish the formation of voltage zero-cross lock-out pulse row, and with spike train by M phase signals transtation mission circuit 5 and T phase signals transtation mission circuit 5 ' transmission, carry out pulse and amplify, and then remove to trigger high-pressure thyristor valve group SCR and finish dynamic switching.Non-impact current when the voltage zero-cross synchronous triggering can guarantee high voltage switch device switching capacitance type compensation arrangement input; Locking pulse, current over-zero turn-off does not have impulse overvoltage in the time of can realizing the excision of high voltage switch device switching capacitance type compensation arrangement.Simultaneously with detected high-pressure thyristor valve group SCR status signal by M phase signals receiving circuit 6 and T phase signals receiving circuit 6 ' feed back to control device 201, through logic determines, send guard signal, SCR protects to the high-pressure thyristor valve group.Also detected signal of jumping QF (QF ') is blocked trigger impulse fast simultaneously, guarantee that circuit breaker Q F (QF ') no-load disconnects.
At control section, for convenience of description, total control task has been divided into by first control unit and second control unit finished jointly, as shown in Figure 5.It is a kind of restriction to embodiment of the present invention that but this describing method should not be construed as.Wherein a kind of typical control process is specifically realized by following method, at first by TA, TA ', TV, TV ' detection M phase and T electric current and voltage signal mutually, deliver to signal and go into out circuit 10, through signal conditioning circuit 102, become digital signal to transfer to first control unit 7 analog signal conversion through A/D converter 703 again, through the CPU1 of first control unit 7 701 computings, obtain M phase and T real-time idle amount mutually, with set in advance given idle amount and compare, obtain high voltage switch device switching capacitance type compensation arrangement 301,301 ' respectively compensate the throwing of branch road, cut signal, the throwing that this obtains, cut signal and deliver to second control unit 8, as shown in Figure 6 by digital I/O 101.As shown in Figure 7, switching order that second control unit, 8 acceptance, first control unit 7 is sent and the synchronizing signal of sending by signal deteching circuit 10, at first produce link 802 through the zero cross fired signal, form the formation that link 803 is finished voltage zero-cross lock-out pulse row through spike train again, spike train is by M phase signals transtation mission circuit 5 and T phase signals transtation mission circuit 5 ' transmission, carrying out pulse then amplifies, remove to trigger the high-pressure thyristor valve group SCR1-SCRn of M phase high voltage switch assembly circuit 4, and T phase high voltage switch assembly 4 ' high-pressure thyristor valve group SCR1 '-SCRn ', sending throwing, cut signal and go to trigger the formation of finishing voltage zero-cross lock-out pulse row when the high voltage switch device is finished dynamic switching, when voltage zero-cross, finish synchronous triggering, non-impact current when guaranteeing high voltage switch device switching capacitance type compensation arrangement input; When current over-zero, turn-off, do not have impulse overvoltage when making the excision of high voltage switch device switching capacitance type compensation arrangement, realize dynamic switching.Dynamic reactive compensation device just can not produce in electric power system and shove the useful life of greatly having improved high voltage switchgear and high voltage switch device switching capacitance type compensation arrangement simultaneously like this.Simultaneously M mutually with T mutually high voltage switch device switching capacitance type compensation arrangement respectively compensate current transformer TA1-TAn in the branch road; TA1 '-TAn ' with detected high-pressure thyristor valve group SCR status signal (including but not limited to compensate branch current I1-In and I1 '-In ') by M phase signals receiving circuit 6 and T phase signals receiving circuit 6 ' feed back to control device 201; through logic determines; discovery has component wear; send guard signal immediately; block trigger impulse by quick blockade link 804, SCR protects to the high-pressure thyristor valve group.Otherwise, can cause the damage of whole string valve group because remaining valve group is born higher voltage.In a kind of embodiment, can also add fault secure circuit 9; this guard signal is also delivered to fault secure circuit 9 simultaneously; fault secure circuit sends trip signal and warning signal, makes circuit breaker Q F and/or circuit breaker Q F ' disjunction, the safety of protection bucking-out system.Signal supervisory instrument device 401,401 ' comprise that further high voltage switch device switching capacitance type compensation arrangement 301,301 ' respectively compensates the current sensing means of branch road, is used for each dynamic compensation branch current signal I
i, I
i' detection.respectively compensate branch road and the M of system by signal supervisory instrument 401,401 ' detection (comprise I with signals such as mutually voltage of T, electric current, unbalance voltages mutually
1-I
n, I
1'-I
n', U
T, U
M, I
T, I
MDeng) after conditioning, deliver to fault secure circuit 9, fault secure circuit sends trip signal and warning signal with measured value and the protection set-point signal that relatively is protected, and makes circuit breaker Q F and/or circuit breaker Q F ' disjunction, the safety of protection bucking-out system.Fault secure circuit 9 is except providing above-mentioned protection, and also for the compensation branch road provides perfect safeguard measure, its protection is mainly: overcurrent protection, unbalance voltage protection, overvoltage protection, o-volt protection, capacitor error protection.These protections realize that by general protective device parameters such as overcurrent and overvoltage protection value can field change.Simultaneously on the panel manual emergency stop botton is set also, when abnormal conditions take place, can manual shut-down, with protection equipment.In the middle of a kind of exemplary embodiments, M phase signals transtation mission circuit 5, signal receiving circuit 6 and T phase signals transtation mission circuit 5 ', signal receiving circuit 6 ' all adopt optical signal transmission mode, antijamming capability with further intensifier, certainly signal transmission form also can adopt and well known to a person skilled in the art additive method, and here not shoulding be understood to is a kind of restriction to embodiment of the present invention.
Because apart from each other between control cubicle and the high-pressure thyristor valve group SCR cabinet is so adopted optical receiving circuit and optical fiber radiating circuit in an embodiment.Adopt optical fiber transmission signal, not only solved the isolating problem between the high-low pressure, and, because of " light signal " is not subjected to electromagnetic interference, also preferably resolve electromagnetic interference problem.Certainly adopting the optical transmission mode is in order to solve effective isolation and anti-interference, in order to reach this purpose, also can adopt other known manner, and should not be construed as at this is a kind of restriction to embodiment of the present invention.In addition, used DC power supply is that the voltage signal of high pressure main circuit is obtained after conversion in the embodiment of the present invention, is obtained after conversion from main circuit current by current transformer after high-pressure thyristor valve group (SCR) conducting.Cooperate and use optical fiber transmission signal, so just solved isolating problem and electromagnetic interference problem between the high-low voltage power source.485 communicating circuits 12 are responsible for state information and the data with the host computer transmitting device, accept the host computer order.
At software section, its task is mainly finished by the program of two CPU is relatively independent.CPU1 is responsible for sampling and the calculating to analog signal, compares according to sampling result calculated and preset parameters then, and then sends switching order (as shown in Figure 6).CPU2 is responsible for forming trigger impulse and guard signal, if receive the switching signal, then forms trigger impulse (as shown in Figure 7).Be to improve the real-time of software, the main task of two CPU softwares is handled and all to be based on interruption.Certainly for simplifying circuit, improve the consideration of integrated level, also can only use a CPU to finish the task of CPU1 and CPU2, should not be construed as at this is a kind of restriction to embodiment of the present invention.
Though described embodiments of the present invention in conjunction with the accompanying drawings, those of ordinary skill in the art can make various distortion or modification within the scope of the appended claims.The present invention also can be applied to other power domains.
Claims (9)
1. dynamic reactive compensation device, this dynamic reactive compensation device comprises main circuit and control device, it is characterized in that: main circuit comprises high voltage switchgear (2,2 '), signal supervisory instrument (401,401 '), the high voltage switch device switching capacitance type compensation arrangement (301 that n branch road arranged, 301 '), n 〉=1 wherein
Leave tap mutually with on the T secondary winding mutually at transformer (1) M, high voltage switchgear (2,2 ') end is connected in the secondary winding tap of the corresponding phase of transformer, one end and high voltage switch device switching capacitance type compensation arrangement (301,301 ') link to each other, described high voltage switchgear (2,2 ') is used to carry out error protection;
Signal supervisory instrument (401,401 ') is connected on the secondary winding of the corresponding phase of transformer, is used for detecting in real time M phase and T voltage signal and current signal mutually;
Control device (201) links to each other with main circuit, be used for according to signal supervisory instrument (401,401 ') the voltage and current signal that records calculates M mutually and T idle amount mutually in real time, determine the idle amount of needs compensation according to the real-time idle amount that calculates, by triggering the high voltage switch device that respectively compensates branch road, realization respectively compensates the dynamic switching of branch road to high voltage switch device switching capacitance type compensation arrangement (301,301 ').
2. a kind of dynamic reactive compensation device according to claim 1, it is characterized in that: described high voltage switch device switching capacitance type compensation arrangement (301,301 ') comprises compensating element, combinational circuit (3,3 '), and high voltage switch assembly circuit (4,4 ').
3. a kind of dynamic reactive compensation device according to claim 2 is characterized in that: described compensating element, combinational circuit (3,3 ') comprises isolating switch, high-voltage parallel capacitor and series reactor; High voltage switch device in the described high voltage switch assembly circuit (4,4 ') is the high-pressure thyristor valve group.
4. a kind of dynamic reactive compensation device according to claim 3, it is characterized in that: described high voltage switchgear (2,2 ') comprise isolating switch QS and isolating switch QS ', and circuit breaker Q F and circuit breaker Q F ', described signal supervisory instrument (401,401 ') comprise current transformer (TA, TA ') and voltage transformer (TV, TV ').
5. a kind of dynamic reactive compensation device according to claim 4, it is characterized in that: described high voltage switch device switching capacitance type compensation arrangement (301,301 ') total capacity by M mutually or reach during T phase maximum load and need the maximum reactive capability of compensation to choose, according to the load variations situation, reasonably be divided into the multiple branch circuit combination; The branch road that respectively compensates of described high voltage switch device switching capacitance type compensation arrangement (301,301 ') is configured to filter 3 times, 5 times, 7 times, 11 times, 13 times according to the harmonic content characteristics of load.
6. according to claim 4 or 5 described a kind of dynamic reactive compensation devices, it is characterized in that: described control device (201) comprises that signal goes into out circuit (10), first control unit (7), second control unit (8), signal sending circuit and signal receiving circuit, described signal is gone into out circuit (10) and signal supervisory instrument (401,401 ') link to each other, described signal is gone into out circuit (10) and is comprised digital I/O (101) and signal conditioning circuit (102), and the digital I/O (101) that described signal is gone into out circuit (10) is used for external switch, the state input of switching order and the output of control logic; Signal conditioning circuit (102) is used for to M mutually and T phase voltage and current signal, and the current signal that high voltage switch device switching capacitance type compensation arrangement (301,301 ') respectively compensates branch road amplifies, shaping and filtering; First control unit (7) is gone into out circuit (10) by signal digital I/O (101) links to each other with second control unit (8); Signal sending circuit and signal receiving circuit are used for transmitting control and state information between second control unit (8) and high voltage switch device switching capacitance type compensation arrangement (301,301 ').
7. a kind of dynamic reactive compensation device according to claim 6, it is characterized in that: first control unit (7) of described control device (201) comprises CPU1 (701), A/D converter (703), A/D converter (703) will change into digital signal with T voltage and current analog signal mutually mutually through the M of signal conditioning circuit (102) conditioning, and transfer to CPU1 (701) and handle, CPU1 (701) is through calculating and handling, obtain M phase and T real-time idle amount mutually, with set in advance given idle amount and compare, obtain high voltage switch device switching capacitance type compensation arrangement (301,301 ') compensation branch road throwing, cut signal, the throwing that this obtains, cut the digital I/O (101) that signal goes into out circuit (10) by described signal and be sent to second control unit (8).
8. a kind of dynamic reactive compensation device according to claim 7, it is characterized in that: switching order that second control unit (8) acceptance first control unit (7) of described control device (201) is sent and the synchronizing signal of sending by signal deteching circuit (10), at first produce link (802) through the zero cross fired signal, form the formation that link (803) is finished voltage zero-cross lock-out pulse row through spike train again, finishing the high voltage switch device when voltage zero-cross throws, cut the synchronous triggering of signal, non-impact current when guaranteeing high voltage switch device switching capacitance type compensation arrangement (301,301 ') input; When current over-zero, turn-off the high voltage switch device, do not have impulse overvoltage when making high voltage switch device switching capacitance type compensation arrangement (301,301 ') excision; Signal sending circuit comprises M phase signals transtation mission circuit (5) and T phase signals transtation mission circuit (5 '), spike train is by M phase signals transtation mission circuit (5) and T phase signals transtation mission circuit (5 ') transmission, carrying out pulse then amplifies, go to trigger the high-pressure thyristor valve group (SCR1-SCRn) of M phase compensation arrangement (4), and the high-pressure thyristor valve group of T phase compensation arrangement (4 ') (SCR1 '-SCRn '), realize dynamic switching.
9. a kind of dynamic reactive compensation device according to claim 8; it is characterized in that: described signal supervisory instrument (401; 401 ') comprise high voltage switch device switching capacitance type compensation arrangement (301; 301 ') respectively compensate the current transformer (TA1-TAn in the branch road; TA1 '-TAn '); signal receiving circuit comprises M phase signals receiving circuit (6) and T phase signals receiving circuit (6 '); the compensating element, combinational circuit comprises M phase compensating element, combinational circuit and T compensating element, combinational circuit mutually; circuit breaker Q F one end links to each other with isolating switch QS; the compensating element, combinational circuit is continuous mutually with M for the other end; a circuit breaker Q F ' end links to each other with isolating switch QS '; the compensating element, combinational circuit is continuous mutually with T for the other end; the described current transformer that respectively compensates branch road feeds back to control device (201) with detected high-pressure thyristor valve group status signal by M phase signals receiving circuit (6) and T phase signals receiving circuit (6 '); through logic determines; discovery has component wear; send guard signal immediately; block trigger impulse by quick blockade link (804); the high-pressure thyristor valve group is protected; same timed unit (201) comprises fault secure circuit (9); this guard signal is also delivered to fault secure circuit (9); fault secure circuit (9) sends trip signal and warning signal; make circuit breaker Q F and/or circuit breaker Q F ' disjunction; the safety of protection high voltage switch device switching capacitance type compensation arrangement (301,301 ').
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101310601A CN101335455B (en) | 2008-01-03 | 2008-08-14 | Dynamic reactive compensator |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810030415 | 2008-01-03 | ||
| CN200810030415.8 | 2008-01-03 | ||
| CN2008101310601A CN101335455B (en) | 2008-01-03 | 2008-08-14 | Dynamic reactive compensator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101335455A CN101335455A (en) | 2008-12-31 |
| CN101335455B true CN101335455B (en) | 2011-11-23 |
Family
ID=40197838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101310601A Active CN101335455B (en) | 2008-01-03 | 2008-08-14 | Dynamic reactive compensator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101335455B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121957B (en) * | 2010-12-25 | 2012-11-07 | 山东新风光电子科技发展有限公司 | Performance testing system of large-capacity reactive power dynamic compensating device |
| CN105128703A (en) * | 2015-09-28 | 2015-12-09 | 西南交通大学 | Method for determining traction network resonance frequency of AT (auto-transformer) complex-line power supply system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4234843A (en) * | 1978-09-15 | 1980-11-18 | Westinghouse Electric Corp. | Static VAR generator with discrete capacitive current levels |
| CN2788434Y (en) * | 2005-03-11 | 2006-06-14 | 武汉港迪电气有限公司 | Harmonious restrain and non-power on-spot compensating device |
| CN1996700A (en) * | 2006-12-01 | 2007-07-11 | 华中科技大学 | Reactive power compensation and power filtering device |
| CN101020425A (en) * | 2007-03-28 | 2007-08-22 | 中国南车集团株洲电力机车研究所 | Mixed static synchronous reactive compensator |
| CN101068082A (en) * | 2007-03-28 | 2007-11-07 | 中国南车集团株洲电力机车研究所 | Comprehensive compensating device and method |
-
2008
- 2008-08-14 CN CN2008101310601A patent/CN101335455B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4234843A (en) * | 1978-09-15 | 1980-11-18 | Westinghouse Electric Corp. | Static VAR generator with discrete capacitive current levels |
| CN2788434Y (en) * | 2005-03-11 | 2006-06-14 | 武汉港迪电气有限公司 | Harmonious restrain and non-power on-spot compensating device |
| CN1996700A (en) * | 2006-12-01 | 2007-07-11 | 华中科技大学 | Reactive power compensation and power filtering device |
| CN101020425A (en) * | 2007-03-28 | 2007-08-22 | 中国南车集团株洲电力机车研究所 | Mixed static synchronous reactive compensator |
| CN101068082A (en) * | 2007-03-28 | 2007-11-07 | 中国南车集团株洲电力机车研究所 | Comprehensive compensating device and method |
Non-Patent Citations (1)
| Title |
|---|
| JP昭58-215932A 1983.12.15 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101335455A (en) | 2008-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103928928B (en) | A kind of high-speed railway quality of power supply and supply conductor voltage comprehensive compensation system | |
| CN102126438B (en) | Electric split-phase non-interruption flexible connection-compensation device and method for traction electric network | |
| CN103050976B (en) | Subsynchronous resonance TCSC (Thyristor Controlled Series Compensation) device of transmission line inhibition system | |
| CN103457261A (en) | Power quality integrated management device of electrified railway traction supply network | |
| CN1942842A (en) | Dynamic reactive compensation system and method | |
| CN103915857B (en) | A kind of high-voltage alternating motor train unit regenerative braking energy feedback absorbs device | |
| CN102195288B (en) | Active tuning type hybrid filter and control method of active tuning | |
| CN101938130A (en) | High voltage filter and dynamic reactive power compensation control system combining PPF with TSC and control method thereof | |
| CN102904264B (en) | A kind of High Voltage and Passive Automatic Compensation Device | |
| CN104184166B (en) | The micro-grid system that a kind of operation, control and protection performance improve | |
| CN102832612B (en) | Hybrid power quality conditioner for direct current power system | |
| CN101299541B (en) | Supervoltage magnetic-controlled shunt reactor excitation equipment | |
| CN103840473A (en) | Double SVC coordination control device | |
| CN106058868A (en) | Distribution transformer harmonic wave equalizing device | |
| CN203761046U (en) | Controllable series compensation system | |
| Song et al. | A novel bidirectional T-source DC circuit breaker for DC microgrids | |
| CN102130460A (en) | Capacitor commutated converter (CCC)-based high voltage DC transmission reactive power harmonic control realization method | |
| CN103560514B (en) | A kind of reactive power compensation and harmonic treatment system | |
| CN101335455B (en) | Dynamic reactive compensator | |
| CN203014389U (en) | High-voltage reactive power automatic compensation device | |
| CN2424559Y (en) | Device for fast regulating arc-extinguishing coil | |
| CN101340098B (en) | Dynamic reactive compensating method | |
| CN106936136B (en) | A kind of all-pass wave filtering harmonic elimination structure and control method for medium voltage network system | |
| CN107370152A (en) | Railway electric car intelligence active filter | |
| CN100334787C (en) | Transformer type adjustable reactor and static reactive compensator compose of it |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CSR ZHUZOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE Free format text: FORMER NAME: ZHUZHOU INST. OF POWER LOCOMOTIVE, CHINA NANCHE GROUP |
|
| CP03 | Change of name, title or address |
Address after: 412000 Hunan Province, Zhuzhou Shifeng District Tian Xin North Gate Patentee after: CSR Zhuzou Electric Locomotive Research Institute Co., Ltd. Address before: 412000 Hunan Province, Zhuzhou Shifeng District Tian Xin era Road Patentee before: Zhuzhou Inst. of Power Locomotive, China Nanche Group |