CN101126786A - Thyristor switched capacitor high voltage valve test device and method - Google Patents
Thyristor switched capacitor high voltage valve test device and method Download PDFInfo
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Abstract
The utility model discloses a testing device of the high-pressure valve of a quartz brake tube slinging capacitor (TSC) as well as a method using the device to conduct TSC valve current test and operation test, which comprises two direct current voltage sources, six auxiliary valves and two relatively independent oscillating circuits composed of two capacitors and two reactors. The testing device realizes different working sequence and test methods by use of the triggering of a series of auxiliary valves, the tested valves are made to operate current and steady-state intensity for a long time under operation test mode and undergo transient state excess current, transient excess voltage and transient heat intensity under excess current test mode, which can both meet the requirements of TSC high voltage valve operation test and excess current test. The utility model adopts the cooperation of resonant circuit and the method of superimposing oscillating current to realize relatively large test current and the test intensity is distributed to two power supplies, which reduces the work intensity of the test device and enhances the safety and reliability.
Description
Technical field
The invention belongs to the measurement technical field of measurement and test, relate to a kind of thyristor switchable capacitor (TSC) high voltage valve test device, also relate to and utilize this device to carry out the method for TSC valve overcurrent test and running test.
Background technology
Along with the progressively popularization that flexible ac transmission technology is used in electric system, the reliability of its core component---high-power high voltage series thyristor valve becomes the key of security of system.Because flexibly AC transmission equipment generally has voltage height, big, the capacious characteristics of electric current, in experimental enviroment, make up with the identical full live road of actual operating mode test have more highly difficult.Thyristor switchable capacitor (TSC) device is a kind of important flexible ac transmission equipment, be mainly used in the reactive-load compensation of electric system, its core component is called the TSC valve, also claim the TSC high-pressure valve, be a kind of thyristor valve, this TSC valve is made up of an antiparallel forward valve and a reversing valve.In normal operating condition, owing to be the switching operation, thyristor valve triggers at current zero-crossing point, and thyristor valve does not bear voltage stress; But under the fault blocking state, because the disappearance of valve electric current, valve will bear the acting in conjunction of system voltage and condenser voltage, its maximum voltage can reach 2 times system works voltage, its representative value that influences of considering overshoot is 2.13 times a system peak voltage, As time goes on, this voltage stress will reduce gradually owing to the discharge of capacitor.The design of maximum current, voltage and temperature stress effect when the purpose of TSC valve operating test and overcurrent test is verified it for length under operating condition and the fault condition is correct.Providing of test capacity is provided, generally adopt at present the method for synthetic test to carry out the running test and the overcurrent test of TSC valve, its basic thought is to adopt many cover power-supply systems to be respectively TSC valve running current, fault overcurrent and high-voltage strength when providing long, promptly existing thyristor switched capacitor high voltage valve test device can not be taken into account the running test and the overcurrent test of TSC high-pressure valve, but adopts two to overlap the test objective that test unit is independently realized running test and overcurrent test respectively.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of test unit of taking into account thyristor switchable capacitor (TSC) high-pressure valve running test and overcurrent test requirement; The present invention simultaneously also provides a kind of method of utilizing this device to carry out TSC valve overcurrent test and running test.
For solving the problems of the technologies described above, thyristor switched capacitor high voltage valve test device of the present invention comprises two direct voltage sources, is respectively heavy DC voltage source and high-voltage direct-current voltage source, and its major function is a complementary testing institute energy requirement; Six auxiliary valves are respectively high-current supply operation valve, high-voltage power supply operation valve, the big current oscillation auxiliary valve of antiparallel forward and oppositely big current oscillation auxiliary valve, antiparallel forward high voltage vibration auxiliary valve and reverse high voltage vibration auxiliary valve; Two capacitors are respectively big current oscillation capacitor and high voltage oscillating capacitor; Two reactors are respectively big current oscillation reactor and high voltage vibration reactor.Wherein big current oscillation capacitor has constituted two relatively independent oscillatory circuits with big current oscillation reactor, high voltage oscillating capacitor and high voltage vibration reactor.
Heavy DC voltage source, high-current supply operation valve, big current oscillation capacitor, big current oscillation reactor, the big current oscillation auxiliary valve of antiparallel forward and oppositely big current oscillation auxiliary valve constitute the relatively independent intensity supply system of tested valve.Wherein, the positive pole output of heavy DC voltage source connects the anode of high-current supply operation valve, the negative electrode of high-current supply operation valve divides two-way, one the tunnel is connected in series the negative pole that connects the heavy DC voltage source behind the big current oscillation capacitor, another road links to each other with oppositely big current oscillation auxiliary valve with the big current oscillation auxiliary valve of antiparallel forward after being connected in series big current oscillation reactor, and the big current oscillation auxiliary valve of antiparallel forward links to each other with the negative pole of heavy DC voltage source after being connected in series test product valve with reverse current oscillation auxiliary valve greatly; High-voltage direct-current voltage source, high-voltage power supply operation valve, high-voltage power supply operation valve, high voltage vibration reactor, antiparallel forward high voltage vibration auxiliary valve and reverse high voltage vibration auxiliary valve constitute another relatively independent intensity supply system of test product valve.Wherein, the positive pole output of high-voltage direct-current voltage source connects the anode of high-voltage power supply operation valve, the negative electrode of high-voltage power supply operation valve divides two-way, connect the negative pole of high-voltage direct-current voltage source behind one tunnel serial connection high voltage oscillating capacitor, behind another road serial connection high voltage vibration reactor with antiparallel forward high voltage vibration auxiliary valve and oppositely high voltage vibration auxiliary valve link to each other, antiparallel forward high voltage vibration auxiliary valve and reverse high voltage vibrate and link to each other with the negative pole of high-voltage direct-current voltage source after auxiliary valve is connected in series test product valve.
Thyristor switched capacitor high voltage valve test device of the present invention also comprises an automatic control system, and this automatic control system is controlled the work schedule and the state of test unit hardware circuit.This automatic control system comprises that a signal gathering unit, a test lock unit, regulon, one trigger a logical block and a personal-machine interface unit.Signal gathering unit is gathered the coherent signal of a hardware circuit of this test unit, and is digital signal with the analog signal conversion that collects; The test lock unit is used for producing the test synchronizing pulse, and the effect of test synchronizing pulse is that the triggering for each valve provides time reference constantly; The instruction that regulon response man-machine interface unit is assigned by fieldbus, finish the manual block/release work of each valve trigger command, this regulon determines that the triggering of each valve in hardware circuit sends trigger command constantly and according to the test synchronizing pulse, this regulon also calculates effective value, the peak value of each important physical amount, and the result is reported the man-machine interface unit by fieldbus; Trigger trigger command that logical block assigns according to regulon and send trigger pulse, make valve, simultaneously, also the abnormal conditions of valve are monitored and handle in specific moment conducting to each valve in hardware circuit; The man-machine interface unit is used for issuing manual command, the parameter that the operations staff sets by fieldbus to each unit, and the interface form of the information that each unit is reported and submitted through fieldbus by the close friend shown.This automatic control system also comprises a direct voltage source control module, this direct voltage source control module be used to control heavy DC voltage source and high-voltage direct-current voltage source input, withdraw from.
The method that the present invention carries out TSC valve overcurrent test comprises the steps: before test to select to make the vibrate oscillation frequency of oscillation circuit of reactor of the oscillation circuit of big current oscillation capacitor and big current oscillation reactor and high voltage oscillating capacitor and high voltage identical by parameter, forward voltage intensity is provided by big current oscillation capacitor, reverse voltage intensity is provided by the high voltage oscillating capacitor, tested valve bears forward voltage intensity during initial time～first constantly, forward valve at big current oscillation auxiliary valve of the first time trigger forward and tested valve, produce first oscillating current, at second time trigger forward high voltage vibration auxiliary valve, produce second oscillating current, first oscillating current ends at the 3rd moment natural zero-crossing, second oscillating current ends at the 4th moment natural zero-crossing, after second oscillating current ends, voltage reversal on the high voltage oscillating capacitor triggers reverse high voltage vibration auxiliary valve this moment again reverse voltage intensity is added on tested valve.This reverse voltage intensity is 2.1 times of forward voltage intensity.
The method that the present invention carries out the TSC valve operating test comprises the steps: at first the forward valve at big current oscillation auxiliary valve of the 5th time trigger forward and tested valve, produce the 3rd oscillating current, then at the 6th time trigger forward high voltage vibration auxiliary valve, produce the 4th oscillating current, the 3rd oscillating current ends at the 7th moment natural zero-crossing, and the 4th oscillating current ends at the 8th moment natural zero-crossing; After the 4th oscillating current ends, reversing valve at oppositely big current oscillation auxiliary valve of the 8th time trigger and tested valve, produce the negative sense oscillating current half-wave of the 3rd oscillating current, at the reverse high voltage vibration of the 9th time trigger auxiliary valve, produce the negative sense oscillating current half-wave of the 4th oscillating current, the negative sense half-wave of the 3rd oscillating current ends at the tenth moment natural zero-crossing, and the negative sense half-wave of the 4th oscillating current ends at the 11 moment natural zero-crossing; Trigger the forward valve of big current oscillation auxiliary valve of forward and tested valve simultaneously in the 11 moment, begin next test period.
The 7th constantly constantly～the 8th, the tenth constantly～the 11 constantly the big current oscillation auxiliary valve of antiparallel forward with oppositely greatly between the off period of current oscillation auxiliary valve the heavy DC voltage source can carry out complementary energy to big current oscillation capacitor by the high-current supply operation valve; The 5th constantly constantly～the 6th, the 8th constantly antiparallel constantly～the 9th forward high voltage vibration auxiliary valve and reverse high voltage vibrate, and the high-voltage direct-current voltage source can carry out complementary energy to the high voltage oscillating capacitor by the high-voltage power supply operation valve between off period of auxiliary valve.
Thyristor switched capacitor high voltage valve test device of the present invention cooperates realization different work schedule and test method by the triggering of a series of auxiliary valves, running current and steady state thermal intensity when under thyristor switched capacitor high voltage valve test device running test mode, making the tolerance of tested valve with suitable long of actual condition, under thyristor switched capacitor high voltage valve test device overcurrent test mode, make tested valve tolerance with the suitable transient state excess current of actual condition, transient overvoltage and Transient Thermal intensity, thereby realize test examination, take into account the requirement of thyristor switched capacitor high voltage valve test device running test and overcurrent test normal operating condition of tested valve and fault condition characteristic.Thyristor switched capacitor high voltage valve test device of the present invention adopts resonant circuit to cooperate, the method of oscillating current stack realizes bigger test current, proof strength is assigned to two power supplys cooperates realization, reduce self working strength of test unit, improved the safe reliability of test unit; Forward and reverse trial voltage is provided by two group capacitors respectively, can distinguish independent control, control mode, regulative mode are flexible, and this test unit structure is flexible, the parameter regulation mode is easy, only needs adjusting inductance, capacitor resonance parameter just can realize the reproduction of actual operating mode.Thyristor switched capacitor high voltage valve test device bulk loop of the present invention is simple in structure, can reduce the experiment power supply capacity greatly, reduces investment outlay.
Description of drawings
Fig. 1 is a thyristor switched capacitor high voltage valve test device topology diagram of the present invention;
Fig. 2 is the schematic diagram of the automatic control system of thyristor switched capacitor high voltage valve test device of the present invention;
Fig. 3 is a thyristor switched capacitor high voltage valve overcurrent test voltage and current waveform of the present invention;
Fig. 4 is a thyristor switched capacitor high voltage valve running test current waveform figure of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail.
Thyristor switched capacitor high voltage valve test device topological structure principle of the present invention such as Fig. 1 show, wherein E1 is that heavy DC voltage source, E2 are the high-voltage direct-current voltage source, Vt is tested TSC valve, tested valve Vt is made up of an antiparallel forward valve Vt1 and a reversing valve Vt2, C1 is that big current oscillation capacitor, L1 are big current oscillation reactors, C2 is the high voltage oscillating capacitor, and L2 is a high voltage vibration reactor; Big current oscillation capacitor C1 and big current oscillation reactor L1, high voltage oscillating capacitor C2 and high voltage vibration reactor L2 have constituted two relatively independent oscillatory circuits.Vs1 is the high-current supply operation valve, and Vs2 is the high-voltage power supply operation valve, and V11 is the big current oscillation auxiliary valve of forward, and V12 is oppositely big current oscillation auxiliary valve, and V21 is a forward high voltage vibration auxiliary valve, and V22 is reverse high voltage vibration auxiliary valve.
The positive pole output of heavy DC voltage source E1 connects the anode of high-current supply operation valve Vs1, the negative electrode of high-current supply operation valve Vs1 divides two-way, one the tunnel is connected in series the negative pole that meets heavy DC voltage source E1 behind the big current oscillation capacitor C1, another road links to each other with oppositely big current oscillation auxiliary valve V12 with the big current oscillation auxiliary valve of antiparallel forward V11 after being connected in series big current oscillation reactor L1, and the big current oscillation auxiliary valve of antiparallel forward V11 links to each other with the negative pole of heavy DC voltage source E1 after being connected in series test product valve Vt with reverse current oscillation auxiliary valve V12 greatly; Heavy DC voltage source E1, high-current supply operation valve Vs1, big current oscillation capacitor C1, big current oscillation reactor L1, antiparallel forward big current oscillation auxiliary valve V11 and oppositely big current oscillation auxiliary valve V12 constitute the relatively independent intensity supply system of test product valve Vt.Symmetrical with it, high-voltage direct-current voltage source E2, high-voltage power supply operation valve Vs2, high voltage oscillating capacitor C2, high voltage vibration reactor L2, antiparallel forward high voltage vibration auxiliary valve V21 and reverse high voltage vibration auxiliary valve V22 constitute another relatively independent intensity supply system of test product valve Vt, wherein the output of the positive pole of high-voltage direct-current voltage source E2 connects the anode of high-voltage power supply operation valve Vs2, the negative electrode of high-voltage power supply operation valve Vs2 divides two-way, connect the negative pole of high-voltage direct-current voltage source E2 behind one tunnel serial connection high voltage oscillating capacitor C2, behind another road serial connection high voltage vibration reactor L2 with antiparallel forward high voltage vibration auxiliary valve V21 and oppositely high voltage vibration auxiliary valve V22 link to each other, antiparallel forward high voltage vibration auxiliary valve V21 and reverse high voltage vibrate and link to each other with the negative pole of high-voltage direct-current voltage source E2 after auxiliary valve V22 is connected in series test product valve Vt.
It more than is explanation to a hardware circuit of thyristor switched capacitor high voltage valve test device of the present invention, test unit of the present invention also comprises a secondary control system, it is automatic control system, as shown in Figure 2, this automatic control system comprises that a signal gathering unit, a test lock unit, regulon, one trigger a logical block and a personal-machine interface unit.
Signal gathering unit is gathered the coherent signal of a hardware circuit of this test unit, and is digital signal with the analog signal conversion that collects.These coherent signals comprise the electric current of the voltage of tested valve Vt, tested valve Vt, the voltage of high voltage oscillating capacitor C2, the electric current of high voltage vibration reactor L2, the voltage of big current oscillation capacitor C1, the electric current of big current oscillation reactor L1 etc.
The test lock unit is used for producing the test synchronizing pulse, and the effect of test synchronizing pulse is that the triggering for each valve provides time reference constantly.The 50Hz ac voltage signal that the input signal of this unit uses when being heavy DC voltage source E1 formation DC voltage, this voltage signal is filtered in the test lock unit, integer, forming frequency is the square wave synchronizing pulse of 50Hz.
Manual block/release the work of each valve trigger command is finished in the instruction that regulon response man-machine interface unit is assigned by fieldbus; And, parameters such as the pilot project that this unit is set according to the man-machine interface unit, mode of operation, adjusting definite value, and signal gathering unit is to the collection result of a hardware circuit coherent signal, determines that the triggering of each valve in hardware circuit is sent trigger command constantly and according to the test synchronizing pulse.In addition, results such as the effective value of also responsible each the important physical amount of calculating of regulon, peak value report the man-machine interface unit with the result by fieldbus.Regulon has self-checking function, and self-detection result reports to the man-machine interface unit by fieldbus.
Trigger trigger command that logical block assigns according to regulon and send trigger pulse, make valve in specific moment conducting to each valve in hardware circuit.Simultaneously, this unit also monitors valve and protects; Whenever valve occurs unusually, trigger logical block and will take the corresponding protection measure, and report this incident to the man-machine interface unit by fieldbus.Trigger logical block and have self-checking function, self-detection result reports to the man-machine interface unit by fieldbus.
The man-machine interface unit is used for issuing manual command, the parameter that the operations staff sets by fieldbus to each unit of automatic control system, and the interface form of the information that each unit is reported and submitted through fieldbus by the close friend shown.
This automatic control system also comprises a direct voltage source control module, the order that this direct voltage source control module is assigned through fieldbus according to the man-machine interface unit control heavy DC voltage source E1 and high-voltage direct-current voltage source E2 input, withdraw from.
Because a hardware circuit needs automatic control system just can finish the work, therefore, automatic control system need power on prior to a hardware circuit.After powering on, regulon, triggering logical block and man-machine interface unit all carry out self check, if each unit is normal, and regulon correctly the received signal collecting unit data, can correctly receive synchronizing pulse, then the man-machine interface unit is normal with reports control system.
In this case, the operations staff can begin test operation.The operations staff is by interface setting pilot project mode of operation and regulate definite value.Wherein, pilot project comprises overcurrent test and running test; Mode of operation comprises automatically and is manual; Under automatic mode, the operations staff can set tested valve current peak, definite values such as effective value, regulon is regulated trigger interval between big current oscillation auxiliary valve (comprising antiparallel forward big current oscillation auxiliary valve V11 and oppositely big current oscillation auxiliary valve V12) and the high voltage vibration auxiliary valve (comprise antiparallel forward high voltage vibration auxiliary valve V21 and reverse high voltage vibrate auxiliary valve V22) to reach the definite value of appointment, under manual mode, the operations staff needs manually to set the trigger interval between big current oscillation auxiliary valve and the high voltage vibration auxiliary valve, to meet the requirements of definite value; Above-mentioned three kinds of data will be sent to regulon by fieldbus.
After setting up parameters, the operations staff can begin to test.The operations staff assigns the instruction of direct voltage source input, valve deblocking instruction, test enabled instruction etc. according to operating standard by the man-machine interface unit.Wherein, first instruction delivered to the direct voltage source control module by fieldbus, carried out by this unit; Second instruction delivered to regulon by fieldbus, carried out by regulon; The 3rd instruction is broadcast to all by fieldbus and is connected unit on this bus.
After the test startup command of man-machine interface unit by fieldbus broadcasting received in each unit, with the test mission that begins to carry out separately.Regulon is finished assigning of each valve trigger command according to the triggering sequential of each valve of a hardware circuit in TSC high-pressure valve running test or overcurrent test respectively, triggers logical block and will send the trigger pulse coding to each valve according to trigger command; In the cycle that equals synchronizing pulse cycling time of each trigger process, under the situation that pilot project, mode of operation, adjusting definite value are determined, each triggers fixes with respect to the time location of synchronizing pulse constantly.Trigger logical block and also valve is carried out real time monitoring, when finding that valve occurs will taking corresponding measure that valve is carried out protection when unusual.
After test was finished, the operations staff will be according to specific order, assigned valve blocking, direct voltage source by the man-machine interface unit and instruction such as withdrawed from, and made a hardware circuit safety withdraw from test.Wherein, article one instruction is delivered to regulon through fieldbus, is carried out by regulon; The second instruction is delivered to the direct voltage source control module through fieldbus, is withdrawed from by this unit controls direct voltage source safety.
Utilize principle waveform that apparatus of the present invention carry out TSC valve overcurrent test as shown in Figure 3, select to make the vibrate oscillation frequency of oscillation circuit of reactor L2 of the oscillation circuit of big current oscillation capacitor C1 and big current oscillation reactor L1 and high voltage oscillating capacitor C2 and high voltage identical by parameter, forward voltage intensity U1 is provided by big current oscillation capacitor C1, and reverse voltage intensity U2 is provided by high voltage oscillating capacitor C2.The t of initial time shown in the figure
0～the first moment t
1Tested during this time valve bears forward voltage intensity U1, to first moment t
1Trigger the forward valve Vt1 of forward big current oscillation auxiliary valve V11 and tested valve Vt, produce the first oscillating current i1; Second moment t
2Trigger forward high voltage vibration auxiliary valve V21, produce the second oscillating current i2; The first oscillating current i1 is at the 3rd moment t
3Natural zero-crossing and ending, the second oscillating current i2 is at the 4th t constantly
4Natural zero-crossing and ending, after the second oscillating current i2 ended, high voltage oscillating capacitor C2 went up voltage reversal, triggers reverse high voltage vibration auxiliary valve V22 this moment again reverse voltage intensity U2 is added on tested valve Vt.By the voltage ratio of control heavy DC voltage source E1 and high-voltage direct-current voltage source E2, making this reverse voltage intensity is 2.1 times of forward voltage intensity.The advantage of this test method is that the stack of the first oscillating current i1 and the second oscillating current i2 promptly is the excess current it of tested valve Vt tolerance, can reduce the required strength of current of device greatly; And the forward voltage of tested valve comes from different sources with reverse voltage, can independently control, and has realized the withstand voltage requirement bigger 2 times than system voltage under the TSC valve fault condition.
Utilize principle waveform that apparatus of the present invention carry out the TSC valve operating test as shown in Figure 4, the TSC valve operating test no longer needs to apply voltage strength.Initial time t
0 'Trigger the forward valve Vt1 of forward big current oscillation auxiliary valve V11 and tested valve Vt, produce the first oscillating current i1 '; First moment t
1 'Trigger forward high voltage vibration auxiliary valve V21, produce the second oscillating current i2 '; The first oscillating current il ' is at second moment t
2 'Natural zero-crossing and ending, the second oscillating current i2 ' is at the 3rd t constantly
3 'Natural zero-crossing and ending; After the second oscillating current i2 ' ends, at the 3rd moment t
3 'Trigger the reversing valve Vt2 of oppositely big current oscillation auxiliary valve V12 and tested valve Vt, produce the negative sense oscillating current half-wave of the first oscillating current i1 '; The 4th moment t
4 'Trigger reverse high voltage vibration auxiliary valve V22, produce the negative sense oscillating current half-wave of the second oscillating current i2 '; The negative sense half-wave of the first oscillating current i1 ' is at the 5th moment t
5 'Natural zero-crossing and ending, the negative sense half-wave of the second oscillating current i2 ' is at the 6th t constantly
6 'Natural zero-crossing and ending.Simultaneously at the 6th moment t
6 'Trigger the forward valve Vt1 of forward big current oscillation auxiliary valve V11 and tested valve Vt, begin next test period.At second moment t
2 '～the three moment t
3 ', the 5th t constantly
5 '～the six moment t
6 'Heavy DC voltage source E1 can carry out complementary energy to big current oscillation capacitor C1 by high-current supply operation valve Vs1 between the off period of antiparallel forward big current oscillation auxiliary valve V11 and oppositely big current oscillation auxiliary valve V12; At initial time t
0 '～the first moment t
1 ', the 3rd t constantly
3 '～the four moment t
4 'High-voltage direct-current voltage source E2 can carry out complementary energy to high voltage oscillating capacitor C2 by high-voltage power supply operation valve Vs2 between the off period of antiparallel forward high voltage vibration auxiliary valve V21 and reverse high voltage vibration auxiliary valve V22.This test method has the advantage of electric current stack, greatly reduces the required strength of current of device.
Thyristor switched capacitor high voltage valve test device of the present invention cooperates realization different work schedule and test method by the triggering of a series of auxiliary valves, running current and steady state thermal intensity when under TSC valve operating test mode, making the tolerance of tested valve with suitable long of actual condition, under TSC valve overcurrent test mode, make tested valve tolerance with the suitable transient state excess current of actual condition, transient overvoltage and Transient Thermal intensity, thereby realize test examination, satisfy the requirement of TSC valve operating test and overcurrent test normal operating condition of tested valve and fault condition characteristic.TSC valve action test set of the present invention adopts resonant circuit to cooperate, the method of oscillating current stack realizes bigger test current, proof strength is assigned to two power supplys cooperates and realize, reduced self working strength of test unit, improved the safe reliability of test unit; Forward and reverse trial voltage is provided by two group capacitors respectively, can distinguish independent control, control mode, regulative mode are flexible, and this test unit structure is flexible, the parameter regulation mode is easy, only needs adjusting inductance, capacitor resonance parameter just can realize the reproduction of actual operating mode.Thyristor switched capacitor high voltage valve test device bulk loop of the present invention is simple in structure, can reduce the experiment power supply capacity greatly, reduces investment outlay.The method that adopts thyristor switched capacitor high voltage valve test device of the present invention to carry out TSC valve overcurrent test and running test can be simulated actual operating mode and fault condition well, design with maximum current, voltage and the temperature stress effect under operating condition and the fault condition when long of checking TSC valve is correct, and it is safe and reliable, easy to operate to adopt thyristor switched capacitor high voltage valve test device of the present invention to carry out the method for TSC valve overcurrent test and running test.
Claims (7)
1. thyristor switched capacitor high voltage valve test device, it is characterized in that comprising: two direct voltage sources are respectively heavy DC voltage source E1 and high-voltage direct-current voltage source E2; Six auxiliary valves are respectively high-current supply operation valve Vs1, high-voltage power supply operation valve Vs2, antiparallel forward big current oscillation auxiliary valve V21 and oppositely big current oscillation auxiliary valve V22, antiparallel forward high voltage vibration auxiliary valve V21 and reverse high voltage vibration auxiliary valve V22; Two capacitors are respectively big current oscillation capacitor C1 and high voltage oscillating capacitor C2; Two reactors are respectively big current oscillation reactor L1 and high voltage vibration reactor L2; Big current oscillation capacitor C1 and big current oscillation reactor L1, high voltage oscillating capacitor C1 and high voltage vibration reactor L2 have constituted two relatively independent oscillatory circuits;
Wherein the output of the positive pole of heavy DC voltage source E1 connects the anode of high-current supply operation valve Vs1, the negative electrode of high-current supply operation valve Vs1 divides two-way, one the tunnel is connected in series the negative pole that meets heavy DC voltage source E1 behind the big current oscillation capacitor C1, another road links to each other with oppositely big current oscillation auxiliary valve V12 with the big current oscillation auxiliary valve of antiparallel forward V11 after being connected in series big current oscillation reactor L1, and the big current oscillation auxiliary valve of antiparallel forward V11 links to each other with the negative pole of heavy DC voltage source E1 after being connected in series test product valve Vt with reverse current oscillation auxiliary valve V12 greatly; The positive pole output of high-voltage direct-current voltage source E2 connects the anode of high-voltage power supply operation valve Vs2, the negative electrode of high-voltage power supply operation valve Vs2 divides two-way, connect the negative pole of high-voltage direct-current voltage source E2 behind one tunnel serial connection high voltage oscillating capacitor C2, behind another road serial connection high voltage vibration reactor L2 with antiparallel forward high voltage vibration auxiliary valve V21 and oppositely high voltage vibration auxiliary valve V22 link to each other, antiparallel forward high voltage vibration auxiliary valve V21 and reverse high voltage vibrate and link to each other with the negative pole of high-voltage direct-current voltage source E2 after auxiliary valve V22 is connected in series test product valve Vt.
2. thyristor switched capacitor high voltage valve test device according to claim 1, it is characterized in that: this test unit also comprises an automatic control system, and this automatic control system comprises that a signal gathering unit, a test lock unit, regulon, one trigger a logical block and a personal-machine interface unit;
Signal gathering unit is gathered the coherent signal of a hardware circuit of this test unit, and is digital signal with the analog signal conversion that collects; The test lock unit is used for producing the test synchronizing pulse, and this test synchronizing pulse provides time reference constantly for the triggering of each valve; Manual block/release the work of each valve trigger command is finished in the instruction that regulon response man-machine interface unit is assigned by fieldbus, and the triggering of each valve is sent trigger command constantly and according to the test synchronizing pulse in the also definite hardware circuit of regulon; Trigger trigger command that logical block assigns according to regulon and send trigger pulse, make valve in specific moment conducting to each valve in hardware circuit; The man-machine interface unit issues manual command, the parameter that the operations staff sets by fieldbus to each unit, and the interface form of the information that each unit is reported and submitted through fieldbus by the close friend shown.
3. thyristor switched capacitor high voltage valve test device according to claim 2, it is characterized in that: this automatic control system also comprises a direct voltage source control module, the order that this direct voltage source control module is assigned through fieldbus according to the man-machine interface unit control heavy DC voltage source and high-voltage direct-current voltage source input, withdraw from.
4. method of utilizing claim 1,2 or 3 described thyristor switched capacitor high voltage valve test devices to carry out TSC valve overcurrent test, it is characterized in that comprising the steps: before test by parameter select to make oscillation circuit that big current oscillation capacitor C1 and big current oscillation reactor L1 form and high voltage oscillating capacitor C2 and high voltage vibrate reactor L2 composition the oscillation frequency of oscillation circuit identical, forward voltage intensity U1 is provided by big current oscillation capacitor C1, and reverse voltage intensity U2 is provided by high voltage oscillating capacitor C2; The TSC valve bears forward voltage intensity U1 during initial time t0～first moment t1, trigger the forward valve Vt1 of forward big current oscillation auxiliary valve V11 and tested valve Vt to first moment t1, produce the first oscillating current i1, second forward of the t2 triggering constantly high voltage vibration auxiliary valve V21, produce the second oscillating current i2, the first oscillating current i1 ends at the 3rd moment t3 natural zero-crossing, the second oscillating current i2 ends at the 4th moment t4 natural zero-crossing, after the second oscillating current i2 ends, high voltage oscillating capacitor C2 goes up voltage reversal, triggers reverse high voltage vibration auxiliary valve V22 this moment again reverse voltage intensity U2 is added on tested valve Vt.
5. method of carrying out TSC valve overcurrent test according to claim 4 is characterized in that: described reverse voltage intensity U2 is 2.1 times of forward voltage intensity U1.
6. a method of utilizing claim 1,2 or 3 described thyristor switched capacitor high voltage valve test devices to carry out the TSC valve operating test is characterized in that comprising the steps: at initial time t
0 'Trigger the forward valve Vt1 of forward big current oscillation auxiliary valve V11 and tested valve Vt, produce the first oscillating current i1 '; First moment t
1 'Trigger forward high voltage vibration auxiliary valve V21, produce the second oscillating current i2 '; The first oscillating current i1 ' is at second moment t
2 'Natural zero-crossing and ending, the second oscillating current i2 ' is at the 3rd t constantly
3' natural zero-crossing and ending; After the second oscillating current i2 ' ends, at the 3rd moment t
3 'Trigger the reversing valve Vt2 of oppositely big current oscillation auxiliary valve V12 and tested valve Vt, produce the negative sense oscillating current half-wave of the first oscillating current i1 '; The 4th moment t
4 'Trigger reverse high voltage vibration auxiliary valve V22, produce the negative sense oscillating current half-wave of the second oscillating current i2 '; The negative sense half-wave of the first oscillating current i1 ' is at the 5th moment t
5 'Natural zero-crossing and ending, the negative sense half-wave of the second oscillating current i2 ' is at the 6th t constantly
6 'Natural zero-crossing and ending; Simultaneously at the 6th moment t
6 'Trigger the forward valve Vt1 of forward big current oscillation auxiliary valve V11 and tested valve Vt, begin next test period.
7. method of carrying out the TSC valve operating test according to claim 6 is characterized in that: heavy DC voltage source E1 can carry out complementary energy to big current oscillation capacitor C1 by high-current supply operation valve Vs1 between the off period of the 7th moment t7～8th moment t8, the tenth moment t10～11 moment t11 antiparallel forward big current oscillation auxiliary valve V11 and reverse current oscillation auxiliary valve V12 greatly; Vibrating at the 5th auxiliary valve V21 of t5～6th t6, the 8th t8～9th antiparallel forward high voltage vibration of t9 constantly constantly constantly constantly and reverse high voltage, high-voltage direct-current voltage source E2 can carry out complementary energy to high voltage oscillating capacitor C2 by high-voltage power supply operation valve Vs2 between off period of auxiliary valve V22.
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| CNB2007101221730A CN100568004C (en) | 2007-09-21 | 2007-09-21 | Thyristor switched capacitor high voltage valve test device and method |
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