CN102723718A - Capacitive method and device for improving local voltage in power network - Google Patents
Capacitive method and device for improving local voltage in power network Download PDFInfo
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- CN102723718A CN102723718A CN2012101579489A CN201210157948A CN102723718A CN 102723718 A CN102723718 A CN 102723718A CN 2012101579489 A CN2012101579489 A CN 2012101579489A CN 201210157948 A CN201210157948 A CN 201210157948A CN 102723718 A CN102723718 A CN 102723718A
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Abstract
The invention relates to a capacitive method and a capacitive device for improving local voltage in power network. The capacitive device for improving local voltage in power network is accessed into a line whose voltage needs improving, wherein the device is composed of multiple groups of power capacitor switching devices which are in parallel connection, a voltage controller A, a first surge protective device RV1, a second surge protective device RV2, a third surge protective device RV3, a switch Q, a first current transformer TA1, a second current transformer TA2, and a third current transformer TA3. According to a preset expected output voltage, a measured line voltage and load current, the voltage controller A switches certain groups of power capacitors based on a preset switching scheme, so that the line voltage reaches the expected output voltage. The group number of switched power capacitors and capacity of each group are determined by circuit parameters, wherein the circuit parameters comprise a line resistor r, a line inductive reactance Xl, concrete load condition, and improving range and accuracy the expected output voltage.
Description
Technical field
The present invention relates to power technology and Electrical Control Technology field, method and device that particularly a kind of condenser type electrical network local voltage promotes.
Background technology
The adjusting of electrical network voltage is to realize through the shunting switch of conversion transformer traditionally, and what this method was regulated is the transformer output voltage of whole electrical network afterwards, can not regulate the voltage of a certain branch road and a certain part thereof separately.In order to solve the low problem of electrical network local voltage, present common practice is exactly to increase pressure regulation, pressure stabilizing device such as compensation, magnetic saturation type at the power consumption equipment front end.These pressure regulation, pressure stabilizing device can not improve line voltage, and concerning electrical network, they are loads of perception, and this tends to further reduce line voltage, consumes more idlely, causes bigger line loss, need the more reactive power compensation of increase.Especially for the impact load,,, often be difficult to solve the low problem of electrical network local voltage, even make electric motor starting more difficult because this kind equipment itself can produce the loss of voltage like electric motor starting.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art and provide a kind of and utilize voltage on the induction reactance of power circuit and voltage-phase that capacity current produces when flowing through circuit induction reactance and the electric capacity (because electric capacity is parallelly connected with load; Therefore capacitance voltage also is a load voltage) phase place comes to rise to lower line voltage distribution the principle of the circuit output voltage of expectation on the contrary, promotes the method and the device of electrical network local voltage through the electric capacity that it is suitable that detection line voltage is confirmed switching.
Technical scheme of the present invention is: the method that a kind of condenser type electrical network local voltage promotes; Needing to insert a condenser type electrical network local voltage lifting device on the circuit of booster tension; Output voltage needs according to virtual voltage and expectation insert an amount of electric capacitor, and the voltage-phase and the voltage-phase on the electric capacity that utilize the capacity current in the circuit when flowing through circuit induction reactance, to produce to rise to lower line voltage distribution the circuit output voltage of expectation on the contrary.
Condenser type electrical network local voltage method for improving detailed process is following:
Voltage controller A in the condenser type electrical network local voltage lifting device handles the back according to preset desired output voltage and the line voltage distribution that measures and load current and necessarily organizes the electric capacitor of number by predetermined switching scheme switching, makes line voltage distribution reach the voltage of desired output.The group number of institute's switching electric capacitor and every group capacity confirm that according to the circuit parameter of circuit circuit parameter comprises line resistance r, circuit induction reactance X
lWith the concrete condition of load and the output voltage expanded reach and the precision of expection.
The principle of condenser type electrical network local voltage method for improving provided by the invention is following:
Accompanying drawing 1 is not for there be the circuit model of load, i.e. the circuit model of the circuit that needs booster tension of zero load is by line resistance r and circuit induction reactance X
lBe composed in series, the input terminal voltage of circuit is u
0, output end voltage is u
A, when circuit does not have load not promote electric capacity yet, u
A=u
0Accompanying drawing 2 is for having added the circuit model that promotes behind the electric capacity, by line resistance r, circuit induction reactance X
lWith lifting capacitive reactance X
cBe composed in series X successively
cCapacitive reactance for the lifting electric capacity of condenser type electrical network local voltage lifting device.Accompanying drawing 3 is the polar plot of the relevant electric weight of accompanying drawing 2 circuits, u
ABe condenser type electrical network local voltage lifting device output end voltage, i
cBe condenser type electrical network local voltage lifting device electric current, u
xBe i
cCircuit overall presure drop under the electric current, u
XlBe i
cCircuit induction reactance pressure drop under the electric current, u
rBe i
cLine resistance pressure drop under the electric current.Obviously visible from the polar plot of accompanying drawing 3; After inserting a condenser type electrical network local voltage lifting device on the circuit that is needing booster tension, the effect that promotes line voltage distribution is played in the pressure drop on the online road feel of electric capacitor electric current in the condenser type electrical network local voltage lifting device is anti-.Certainly, after needing on the circuit of booster tension to insert a condenser type electrical network local voltage lifting device, the voltage of whole electrical network promoted also has certain influence, only comparatively speaking to circuit, particularly the influence of access point is wanted big.On engineering, inserting the voltage △ uk that promotes behind the electric capacity when unloaded can be approximately
△uk=u
xl=I
CX
l (1)
I in the formula
CBe i
cEffective value.
The booster tension that needs when getting △ uk for zero load, the lifting electric capacity that needs when then unloaded does
C
k=3U
eI
C=3U
e△uk/X
l ?(2)
Accompanying drawing 4 circuit model after for load on the circuit band that needs booster tension.R is a load resistance, and X is a load reactance.Accompanying drawing 5 is the polar plot of the relevant electric weight of accompanying drawing 4 circuits.Visible from the polar plot of accompanying drawing 5, the circuit band have the loss of voltage after the load.On the engineering, the voltage △ uf that load is lost on the line can be approximately
△uf=IRcosφ+IXsinφ (3)
I is the effective value of load phase current in the formula, and φ is the power-factor angle of load.
The loss of voltage when if circuit needs compensating load, according to formula 1 and 2, the lifting electric capacity that needs during load does
C
f=3U
eI
C=3U
e△uf/X
l=3U
e(IRcosφ+IXsinφ)/?X
l (4)
After having confirmed the total voltage △ u that needs to promote, can get by formula 2 and always to promote electric capacity and do
C=3U
eI
C=3U
e△u/X
l （5）
Above operate approximately is slightly more a little bit smaller than actual needs.When practice, consider this point and suitable surplus, can increase by 20% to 50% total capacitance.Divide into groups as for the electric capacitor of institute's switching, divide according to the voltage total amount that will promote and lifting and compensation precision, be divided into 6 to N groups, the voltage that promote is high, and precision is high divides into groups just manyly, otherwise just lacks.
Electric capacitor switching device, voltage controller A, the first Surge Protector RV1, the second Surge Protector RV2, the 3rd Surge Protector RV3, switch Q and the first current transformer TA1, the second current transformer TA2, the 3rd current transformer TA3 that the condenser type electrical network local voltage lifting device that above-mentioned voltage boosting method adopted is connected in parallel by plural groups form.
Described electric capacitor switching device is made up of capacitor group C, thermal relay FR, capacitor switching contactor KM, the first current limiting reactor LC1, the second current limiting reactor LC2, the 3rd current limiting reactor LC3 and the first fuse F U1, the second fuse F U2, the 3rd fuse F U3.
Capacitor group C is composed in series by the first electric capacitor C1, the second electric capacitor C2 and the 3rd electric capacitor C3; The end of the first thermal element FR1 of thermal relay FR is connected with the first electric capacitor C1 of capacitor group C, the 3rd electric capacitor C3; The other end of the first thermal element FR1 of thermal relay FR is connected with capacitor switching contactor KM first utmost point KM1; The other end of capacitor switching contactor KM first utmost point KM1 is connected with the first current limiting reactor LC1, and the other end of the first current limiting reactor LC1 is connected with the first fuse F U1.
The end of the second thermal element FR2 of thermal relay FR is connected with the first electric capacitor C1 of capacitor group C, the second electric capacitor C2; The other end of the second thermal element FR2 of thermal relay FR is connected with capacitor switching contactor KM second utmost point KM2; The other end of capacitor switching contactor KM second utmost point KM2 is connected with the second current limiting reactor LC2, and the other end of the second current limiting reactor LC2 is connected with the first fuse F U2.
The end of the 3rd thermal element FR3 of thermal relay FR is connected with the second electric capacitor C2 of capacitor group C, the 3rd electric capacitor C3; The other end of the 3rd thermal element FR3 of thermal relay FR is connected with the 3rd utmost point KM3 of capacitor switching contactor KM; The other end of the 3rd utmost point KM3 of capacitor switching contactor KM is connected with the 3rd current limiting reactor LC3, and the other end of the 3rd current limiting reactor LC3 is connected with the 3rd fuse F U3.
The major function of described voltage controller A is according to the voltage that records, the switching that electric current is controlled electric capacitor, also has overcurrent protection and electric current and voltage Presentation Function in addition.
Described capacitor switching contactor KM also can adopt noncontacting switch, like controllable silicon, solid-state relay etc.
In condenser type electrical network local voltage lifting device; The other end of the first fuse F U1 in first group of electric capacitor switching device is connected with the first Surge Protector RV1, and the other end ground connection of the first Surge Protector RV1 also is connected with an end of the first current transformer TA1 secondary coil, the second current transformer TA2 secondary coil, the 3rd current transformer TA3 secondary coil.The other end of the second fuse F U2 is connected with the second Surge Protector RV2, and the other end ground connection of the second Surge Protector RV2 also is connected with an end of the first current transformer TA1 secondary coil, the second current transformer TA2 secondary coil, the 3rd current transformer TA3 secondary coil.The other end of the 3rd fuse F U3 is connected with the 3rd Surge Protector RV3, and the other end ground connection of the 3rd Surge Protector RV3 also is connected with an end of the first current transformer TA1 secondary coil, the second current transformer TA2 secondary coil, the 3rd current transformer TA3 secondary coil.By that analogy, the connected mode of second group of electric capacitor switching device～N group electric capacitor switching device is identical with the connected mode of first group of electric capacitor switching device.The end of switch Q first utmost point Q1 is connected with the first Surge Protector RV1, the first fuse F U1; The end of switch Q second utmost point Q2 is connected with the second Surge Protector RV2, the second fuse F U2, and the end of switch Q the 3rd utmost point Q3 is connected with the 3rd Surge Protector RV3, the 3rd fuse F U3.Voltage controller A port A1 is connected with the first Surge Protector RV1; Voltage controller A port A2 is connected with the second Surge Protector RV2; Voltage controller A port A3 is connected with the 3rd Surge Protector RV3; Voltage controller A port A4 is connected with an end of the first current transformer TA1 secondary coil, the second current transformer TA2 secondary coil and the 3rd current transformer TA3 secondary coil; Voltage controller A port A5 is connected with the other end of the 3rd current transformer TA3 secondary coil; Voltage controller A port A6 is connected with the other end of the second current transformer TA2 secondary coil, and voltage controller A port A7 is connected with the other end of the first current transformer TA1 secondary coil.
During use; Switch Q first utmost point Q1 of voltage lifting device, second utmost point Q2, the 3rd utmost point Q3 are connected with the three-phase power circuit L1, L2, the L3 that need booster tension through the primary winding of the first current transformer TA1, the second current transformer TA2, the 3rd current transformer TA3 respectively, and L11, L21, L31 are respectively the three-phase power circuit voltage output end behind the booster tension.
The further technical scheme of condenser type electrical network local voltage lifting device provided by the invention is: in condenser type electrical network local voltage lifting device, increase the 4th current transformer TA4, the 5th current transformer TA5 and the 6th current transformer TA6 that is used for detecting load current; One end of the 4th current transformer TA4 secondary coil, the 5th current transformer TA5 secondary coil and the 6th current transformer TA6 secondary coil is connected with voltage controller A port A4; The other end of the 4th current transformer TA4 secondary coil is connected with voltage controller A port A10; The other end of the 5th current transformer TA5 secondary coil is connected with voltage controller A port A9, and the other end of the 6th Current Transformer Secondary coil TA6 is connected with voltage controller A port A8.
During use; One end of the 4th current transformer TA4 primary winding, the 5th current transformer TA5 primary winding and the 6th current transformer TA6 primary winding is connected with the three-phase power circuit L1, L2, the L3 that need booster tension respectively, and the other end of the 4th current transformer TA4 primary winding, the 5th current transformer TA5 primary winding and the 6th current transformer TA6 primary winding is connected voltage output end L11, L21, L31 respectively.
The present invention compared with prior art has following characteristics:
The present invention compares with existing voltage boosting method, and its beneficial effect is that the voltage lifting device not only can not increase electric network reactive-load, and voltage promotes the effect that electric capacity can doublely play reactive power compensation.Being specially adapted to line end promotes with the voltage that bigger perceptual impact load point is arranged.
Below in conjunction with accompanying drawing and embodiment detailed structure of the present invention is further described.
Description of drawings
Accompanying drawing 1 is not load, i.e. the circuit model of the unloaded circuit that needs booster tension;
Accompanying drawing 2 is for having added the circuit model that promotes behind the electric capacity in the circuit of accompanying drawing 1;
Accompanying drawing 3 is the polar plot of the relevant electric weight of accompanying drawing 2 circuits;
Accompanying drawing 4 circuit model after for load on the circuit band that needs booster tension;
Accompanying drawing 5 is the polar plot of the relevant electric weight of accompanying drawing 4 circuits;
Accompanying drawing 6 is the circuit model behind load on the circuit band that needs booster tension and the voltage lifting electric capacity;
Accompanying drawing 7 is a condenser type electrical network local voltage lifting device line construction sketch map;
Accompanying drawing 8 is for being added with the condenser type electrical network local voltage lifting device line construction sketch map of current transformer group TA4～TA6.
Embodiment
The method that embodiment one, a kind of condenser type electrical network local voltage promote; Needing to insert a condenser type electrical network local voltage lifting device on the circuit of booster tension; Output voltage needs according to virtual voltage and expectation insert an amount of electric capacitor, and the voltage-phase and the voltage-phase on the electric capacity that utilize the capacity current in the circuit when flowing through circuit induction reactance, to produce to rise to lower line voltage distribution the circuit output voltage of expectation on the contrary.
Condenser type electrical network local voltage method for improving detailed process is following:
Voltage controller A in the condenser type electrical network local voltage lifting device handles the back according to preset desired output voltage and the line voltage distribution that measures and load current and necessarily organizes the electric capacitor of number by predetermined switching scheme switching, makes line voltage distribution reach the voltage of desired output.The group number of institute's switching electric capacitor and every group capacity confirm that according to the circuit parameter of circuit circuit parameter comprises line resistance r, circuit induction reactance X
lWith the concrete condition of load and the output voltage expanded reach and the precision of expection.
The condenser type electrical network local voltage lifting device that above-mentioned voltage boosting method adopted is made up of six groups of electric capacitor switching devices that are connected in parallel, voltage controller A, the first Surge Protector RV1, the second Surge Protector RV2, the 3rd Surge Protector RV3, switch Q and the first current transformer TA1, the second current transformer TA2, the 3rd current transformer TA3.
The major function of described voltage controller A is according to the voltage that records, the switching that electric current is controlled electric capacitor, also has overcurrent protection and electric current and voltage Presentation Function in addition.
Described electric capacitor switching device is made up of capacitor group C, thermal relay FR, capacitor switching contactor KM, the first current limiting reactor LC1, the second current limiting reactor LC2, the 3rd current limiting reactor LC3 and the first fuse F U1, the second fuse F U2, the 3rd fuse F U3.
Capacitor group C is composed in series by the first electric capacitor C1, the second electric capacitor C2 and the 3rd electric capacitor C3; The end of the first thermal element FR1 of thermal relay FR is connected with the first electric capacitor C1 of capacitor group C, the 3rd electric capacitor C3; The other end of the first thermal element FR1 of thermal relay FR is connected with capacitor switching contactor KM first utmost point KM1; The other end of capacitor switching contactor KM first utmost point KM1 is connected with the first current limiting reactor LC1, and the other end of the first current limiting reactor LC1 is connected with the first fuse F U1.
The end of the second thermal element FR2 of thermal relay FR is connected with the first electric capacitor C1 of capacitor group C, the second electric capacitor C2; The other end of the second thermal element FR2 of thermal relay FR is connected with capacitor switching contactor KM second utmost point KM2; The other end of capacitor switching contactor KM second utmost point KM2 is connected with the second current limiting reactor LC2, and the other end of the second current limiting reactor LC2 is connected with the first fuse F U2.
The end of the 3rd thermal element FR3 of thermal relay FR is connected with the second electric capacitor C2 of capacitor group C, the 3rd electric capacitor C3; The other end of the 3rd thermal element FR3 of thermal relay FR is connected with the 3rd utmost point KM3 of capacitor switching contactor KM; The other end of the 3rd utmost point KM3 of capacitor switching contactor KM is connected with the 3rd current limiting reactor LC3, and the other end of the 3rd current limiting reactor LC3 is connected with the 3rd fuse F U3.
In condenser type electrical network local voltage lifting device; The other end of the first fuse F U1 in first group of electric capacitor switching device is connected with the first Surge Protector RV1, and the other end ground connection of the first Surge Protector RV1 also is connected with an end of the first current transformer TA1 secondary coil, the second current transformer TA2 secondary coil, the 3rd current transformer TA3 secondary coil.The other end of the second fuse F U2 is connected with the second Surge Protector RV2, and the other end ground connection of the second Surge Protector RV2 also is connected with an end of the first current transformer TA1 secondary coil, the second current transformer TA2 secondary coil, the 3rd current transformer TA3 secondary coil.The other end of the 3rd fuse F U3 is connected with the 3rd Surge Protector RV3, and the other end ground connection of the 3rd Surge Protector RV3 also is connected with an end of the first current transformer TA1 secondary coil, the second current transformer TA2 secondary coil, the 3rd current transformer TA3 secondary coil.By that analogy, the connected mode of second group of electric capacitor switching device～6th group electric capacitor switching device is identical with the connected mode of first group of electric capacitor switching device.The end of switch Q first utmost point Q1 is connected with the first Surge Protector RV1, the first fuse F U1; The end of switch Q second utmost point Q2 is connected with the second Surge Protector RV2, the second fuse F U2, and the end of switch Q the 3rd utmost point Q3 is connected with the 3rd Surge Protector RV3, the 3rd fuse F U3.Voltage controller A port A1 is connected with the first Surge Protector RV1; Voltage controller A port A2 is connected with the second Surge Protector RV2; Voltage controller A port A3 is connected with the 3rd Surge Protector RV3; Voltage controller A port A4 is connected with an end of the first current transformer TA1 secondary coil, the second current transformer TA2 secondary coil and the 3rd current transformer TA3 secondary coil; Voltage controller A port A5 is connected with the other end of the 3rd current transformer TA3 secondary coil; Voltage controller A port A6 is connected with the other end of the second current transformer TA2 secondary coil, and voltage controller A port A7 is connected with the other end of the first current transformer TA1 secondary coil.
During use; Switch Q first utmost point Q1 of voltage lifting device, second utmost point Q2, the 3rd utmost point Q3 are connected with the three-phase power circuit L1, L2, the L3 that need booster tension through the primary winding of the first current transformer TA1, the second current transformer TA2, the 3rd current transformer TA3 respectively, and L11, L21, L31 are respectively the three-phase power circuit voltage output end behind the booster tension.
In the present embodiment, basic load is terminal 20m like circuit
3Air compressor machine, the minimum floating voltage 360V of circuit adds the 40kVar electric capacity 20V that raises approximately, and air compressor machine start-up course voltage can not be lower than 360V.Obviously air compressor machine definitely can't start when minimum when the circuit floating voltage is in.Through test and calculating, add 240kVar electric capacity and can guarantee that air compressor machine starts smoothly.At condenser type electrical network local voltage lifting device 6 groups of electric capacitor switching devices are installed, the electric capacitor of 6 groups of electric capacitor switching devices is 40kVar, and voltage controller A controls the switching of electric capacitor switching device between 390V～420V by voltage control.Actual result is different according to the circuit floating voltage, and start-up course drops into 2 to 6 groups of electric capacitor switching devices, starts the back and uses 1 to 3 group of electric capacitor switching device, power factor-0.9～+ 0.9.
Embodiment two, present embodiment are in the condenser type electrical network local voltage lifting device that embodiment one provides, to increase the 4th current transformer TA4, the 5th current transformer TA5 and the 6th current transformer TA6; One end of the 4th current transformer TA4 secondary coil, the 5th current transformer TA5 secondary coil and the 6th current transformer TA6 secondary coil is connected with voltage controller A port A4; The other end of the 4th current transformer TA4 secondary coil is connected with voltage controller A port A10; The other end of the 5th current transformer TA5 secondary coil is connected with voltage controller A port A9, and the other end of the 6th Current Transformer Secondary coil TA6 is connected with voltage controller A port A8.
During use; One end of the 4th current transformer TA4 primary winding, the 5th current transformer TA5 primary winding and the 6th current transformer TA6 primary winding is connected with the three-phase power circuit L1, L2, the L3 that need booster tension respectively, and the other end of the 4th current transformer TA4 primary winding, the 5th current transformer TA5 primary winding and the 6th current transformer TA6 primary winding is connected voltage output end L11, L21, L31 respectively.In condenser type electrical network local voltage lifting device, increase the 4th current transformer TA4, the 5th current transformer TA5 and the 6th current transformer TA6, the intellectuality that can improve condenser type electrical network local voltage lifting device.
Claims (3)
1. the method that promotes of a condenser type electrical network local voltage; It is characterized in that: needing to insert a condenser type electrical network local voltage lifting device on the circuit of booster tension; Output voltage needs according to virtual voltage and expectation insert an amount of electric capacitor, and the voltage-phase and the voltage-phase on the electric capacity that utilize the capacity current in the circuit when flowing through circuit induction reactance, to produce to rise to lower line voltage distribution the circuit output voltage of expectation on the contrary;
Condenser type electrical network local voltage method for improving detailed process is following:
Voltage controller A in the condenser type electrical network local voltage lifting device handles number is necessarily organized in the back by predetermined switching scheme switching electric capacitor according to preset desired output voltage and line voltage distribution that measures and load current; Make line voltage distribution reach the voltage of desired output; The group number of institute's switching electric capacitor and every group capacity confirm that according to the circuit parameter of circuit circuit parameter comprises line resistance r, circuit induction reactance X
lWith the concrete condition of load and the output voltage expanded reach and the precision of expection.
2. a kind of condenser type electrical network local voltage lifting device according to claim 1 is characterized in that: electric capacitor switching device, voltage controller A, the first Surge Protector RV1, the second Surge Protector RV2, the 3rd Surge Protector RV3, switch Q and the first current transformer TA1, the second current transformer TA2, the 3rd current transformer TA3 that are connected in parallel by plural groups form;
Described electric capacitor switching device is made up of capacitor group C, thermal relay FR, capacitor switching contactor KM, the first current limiting reactor LC1, the second current limiting reactor LC2, the 3rd current limiting reactor LC3 and the first fuse F U1, the second fuse F U2, the 3rd fuse F U3;
Capacitor group C is composed in series by the first electric capacitor C1, the second electric capacitor C2 and the 3rd electric capacitor C3; The end of the first thermal element FR1 of thermal relay FR is connected with the first electric capacitor C1 of capacitor group C, the 3rd electric capacitor C3; The other end of the first thermal element FR1 of thermal relay FR is connected with capacitor switching contactor KM first utmost point KM1; The other end of capacitor switching contactor KM first utmost point KM1 is connected with the first current limiting reactor LC1, and the other end of the first current limiting reactor LC1 is connected with the first fuse F U1;
The end of the second thermal element FR2 of thermal relay FR is connected with the first electric capacitor C1 of capacitor group C, the second electric capacitor C2; The other end of the second thermal element FR2 of thermal relay FR is connected with capacitor switching contactor KM second utmost point KM2; The other end of capacitor switching contactor KM second utmost point KM2 is connected with the second current limiting reactor LC2, and the other end of the second current limiting reactor LC2 is connected with the first fuse F U2;
The end of the 3rd thermal element FR3 of thermal relay FR is connected with the second electric capacitor C2 of capacitor group C, the 3rd electric capacitor C3; The other end of the 3rd thermal element FR3 of thermal relay FR is connected with the 3rd utmost point KM3 of capacitor switching contactor KM; The other end of the 3rd utmost point KM3 of capacitor switching contactor KM is connected with the 3rd current limiting reactor LC3, and the other end of the 3rd current limiting reactor LC3 is connected with the 3rd fuse F U3;
In condenser type electrical network local voltage lifting device; The other end of the first fuse F U1 in first group of electric capacitor switching device is connected with the first Surge Protector RV1, and the other end ground connection of the first Surge Protector RV1 also is connected with an end of the first current transformer TA1 secondary coil, the second current transformer TA2 secondary coil, the 3rd current transformer TA3 secondary coil; The other end of the second fuse F U2 is connected with the second Surge Protector RV2, and the other end ground connection of the second Surge Protector RV2 also is connected with an end of the first current transformer TA1 secondary coil, the second current transformer TA2 secondary coil, the 3rd current transformer TA3 secondary coil; The other end of the 3rd fuse F U3 is connected with the 3rd Surge Protector RV3, and the other end ground connection of the 3rd Surge Protector RV3 also is connected with an end of the first current transformer TA1 secondary coil, the second current transformer TA2 secondary coil, the 3rd current transformer TA3 secondary coil; The connected mode of second group of electric capacitor switching device～N group electric capacitor switching device is identical with the connected mode of first group of electric capacitor switching device; The end of switch Q first utmost point Q1 is connected with the first Surge Protector RV1, the first fuse F U1; The end of second utmost point Q2 is connected with the second Surge Protector RV2, the second fuse F U2, and the end of the 3rd utmost point Q3 is connected with the 3rd Surge Protector RV3, the 3rd fuse F U3; Voltage controller A port A1 is connected with the first Surge Protector RV1; Voltage controller A port A2 is connected with the second Surge Protector RV2; Voltage controller A port A3 is connected with the 3rd Surge Protector RV3; Voltage controller A port A4 is connected with an end of the first current transformer TA1 secondary coil, the second current transformer TA2 secondary coil and the 3rd current transformer TA3 secondary coil; Voltage controller A port A5 is connected with the other end of the 3rd current transformer TA3 secondary coil; Voltage controller A port A6 is connected with the other end of the second current transformer TA2 secondary coil, and voltage controller A port A7 is connected with the other end of the first current transformer TA1 secondary coil.
3. a kind of condenser type electrical network local voltage lifting device according to claim 2; It is characterized in that: in condenser type electrical network local voltage lifting device, increase the 4th current transformer TA4, the 5th current transformer TA5 and the 6th current transformer TA6; One end of the 4th current transformer TA4 secondary coil, the 5th current transformer TA5 secondary coil and the 6th current transformer TA6 secondary coil is connected with voltage controller A port A4; The other end of the 4th current transformer TA4 secondary coil is connected with voltage controller A port A10; The other end of the 5th current transformer TA5 secondary coil is connected with voltage controller A port A9, and the other end of the 6th Current Transformer Secondary coil TA6 is connected with voltage controller A port A8.
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| CN2012101579489A CN102723718A (en) | 2012-05-21 | 2012-05-21 | Capacitive method and device for improving local voltage in power network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358920A (en) * | 2021-05-17 | 2021-09-07 | 优利德科技(中国)股份有限公司 | Voltage drop measuring device and voltage drop measuring method |
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| EP1953891A1 (en) * | 2005-09-26 | 2008-08-06 | Ruitian Su | A customer intelligent reactive power automatic compensation energy-saved device |
| US20090115257A1 (en) * | 2007-11-02 | 2009-05-07 | William Robert Letourneau | Switchboard apparatus and method |
| CN101981526A (en) * | 2008-02-25 | 2011-02-23 | 伊尔斯派克技术有限公司 | Reactive power compensation circuit |
| CN202068197U (en) * | 2011-06-22 | 2011-12-07 | 大庆深博电气设备有限公司 | Reactive compensation power-saving filter device |
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2012
- 2012-05-21 CN CN2012101579489A patent/CN102723718A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1953891A1 (en) * | 2005-09-26 | 2008-08-06 | Ruitian Su | A customer intelligent reactive power automatic compensation energy-saved device |
| US20090115257A1 (en) * | 2007-11-02 | 2009-05-07 | William Robert Letourneau | Switchboard apparatus and method |
| CN101981526A (en) * | 2008-02-25 | 2011-02-23 | 伊尔斯派克技术有限公司 | Reactive power compensation circuit |
| CN202068197U (en) * | 2011-06-22 | 2011-12-07 | 大庆深博电气设备有限公司 | Reactive compensation power-saving filter device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113358920A (en) * | 2021-05-17 | 2021-09-07 | 优利德科技(中国)股份有限公司 | Voltage drop measuring device and voltage drop measuring method |
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