CN213027453U - 10kv line voltage compensation device - Google Patents
10kv line voltage compensation device Download PDFInfo
- Publication number
- CN213027453U CN213027453U CN202021869139.7U CN202021869139U CN213027453U CN 213027453 U CN213027453 U CN 213027453U CN 202021869139 U CN202021869139 U CN 202021869139U CN 213027453 U CN213027453 U CN 213027453U
- Authority
- CN
- China
- Prior art keywords
- phase
- power supply
- compensation
- supply line
- voltage
- 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
- 238000004804 winding Methods 0.000 claims abstract description 126
- 238000005070 sampling Methods 0.000 claims abstract description 37
- 238000013500 data storage Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 238000010276 construction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The application relates to a 10kv line voltage compensation device, which comprises: the three-phase three-winding power taking transformer comprises a three-phase three-winding power taking transformer, a sampling module, a control module and a compensating transformer module; the three-phase three-winding electricity-taking transformer is connected in parallel to a power supply line, and the input end of the three-phase three-winding electricity-taking transformer is connected with the input end of the power supply line; the output end of the three-phase three-winding power-taking transformer is respectively connected with the compensating transformer module and the sampling module; the control module is respectively connected with the sampling module and the compensation transformer module; the compensation transformer module is connected in series with a power supply line. According to the technical scheme provided by the application, the independent adjustment of the three-phase voltage can be realized, the adjustment has bidirectionality, the voltage condition of a 10kV power supply line can be improved under the condition that the line current is not greatly influenced, and the problem that the voltage of the 10kV power supply line is too high or too low is solved; meanwhile, the device has small volume, low cost and high reliability.
Description
Technical Field
The utility model belongs to the circuit arrangement or the system of power supply or distribution, concretely relates to 10kv line voltage compensation arrangement.
Background
Although western power grids are continuously transformed and upgraded under the background that national power grids are comprehensively dedicated to promoting the construction of 'strong smart power grids and ubiquitous power internet of things' and constructing 'pivot type, platform type and shared type' energy internet, the power utilization quality of users in part of western high-altitude sparse load areas is still not comprehensively guaranteed. In inland high-altitude areas like Qinghai province, due to the fact that the altitude of the areas is high, the climate conditions are severe, the construction and maintenance processes of a power grid are extremely hard, and the investment and operation and maintenance costs are far higher than those of developed areas in the east. In addition, the load is dispersed, the power supply radius of the power transformation and distribution station is limited, and long medium-voltage lines and the dispersed power transformation and distribution station are often needed to realize the power supply of the whole area. The point-to-point electric energy transmission is characterized in that the distance from a power supply end to a power distribution end is long, under the condition of heavy end load, the influence of parameters such as inductance and resistance of a transmission line is caused, the end voltage drop phenomenon is serious, the voltage quality is seriously unqualified, and the capacitance rise effect is caused by the earth capacitance of a line due to the over-light end load in a low-peak period. The utilization ratio of the main transformer at the power supply end is low, most of power loss is generated in the line transmission process, and the terminal voltage characteristic cannot be improved by simply connecting reactive compensation equipment in parallel mainly due to the loss caused by the fact that active current flows through a longer power transmission line.
In order to ensure the electricity quality of the end users and reduce the line loss, the traditional scheme is to newly build a substation close to the load point. Although the scheme ensures that the voltage of the user side is qualified, the high investment and construction cost, the low resource utilization rate of the transformer substation, the high failure rate and the high operation and maintenance amount of equipment in high-altitude areas are high, the economic, reliable, safe and efficient operation requirements of the smart grid are seriously violated, and the construction and development of the western smart grid are not facilitated. Therefore, a compensation device with low cost and high reliability is needed, which can effectively eliminate the influence of the line distribution parameters in the long-distance transmission process under the condition of load fluctuation, and ensure the power utilization quality of the end user.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at overcoming the not enough of prior art, provide a 10kv line voltage compensation arrangement, can still eliminate the influence that circuit distributed parameter caused in remote transmission process effectively under the undulant condition of load, ensure end user's power consumption quality.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a 10kv line voltage compensation apparatus, the apparatus comprising: the three-phase three-winding power taking transformer comprises a three-phase three-winding power taking transformer, a sampling module, a control module and a compensating transformer module;
the three-phase three-winding electricity-taking transformer is connected in parallel to a power supply line, and the input end of the three-phase three-winding electricity-taking transformer is connected with the input end of the power supply line;
the output end of the three-phase three-winding power-taking transformer is respectively connected with the compensating transformer module and the sampling module;
the control module is respectively connected with the sampling module and the compensating transformer module;
and the compensation transformer module is connected in series with a power supply line.
Further, the three-phase three-winding power-taking transformer is used for providing voltage for the compensation transformer module and providing voltage data of each phase of a power supply line for the sampling module;
the sampling module is used for collecting voltage data of each phase of the power supply line and transmitting the voltage data of each phase of the power supply line to the control module;
the control module is used for determining compensation signals of all phases of the power supply line according to voltage data of all phases of the power supply line and transmitting the compensation signals of all phases of the power supply line to the compensation transformer module;
and the compensation transformer module is used for carrying out forward or reverse compensation on the voltage of each phase of the power supply line according to the compensation signal of each phase of the power supply line.
Further, a primary side winding of the three-phase three-winding power-taking transformer is a single winding, is connected with an input end of a power supply line and is used for acquiring voltage from the power supply line;
the secondary side winding of the three-phase three-winding power-taking transformer is a double winding, is connected with the compensation transformer module and is used for providing voltage for the compensation transformer module;
each phase of a secondary side winding of the three-phase three-winding power-taking transformer comprises three output terminals, wherein the three output terminals are a fifth wiring terminal, a sixth wiring terminal and a seventh wiring terminal;
a first group of secondary side winding coils are arranged between the fifth connecting terminal and the sixth connecting terminal;
a second group of secondary side winding coils are arranged between the sixth connecting terminal and the seventh connecting terminal;
the power supply line single-phase input end, the fifth wiring terminal and the sixth wiring terminal are homonymous ends.
Furthermore, the sampling module comprises a voltage detection unit, a data storage unit and a data calling and transmitting unit;
the voltage monitoring unit is used for collecting the voltage data of each phase of the power supply line provided by the three-phase three-winding power-taking transformer and transmitting the collected voltage data of each phase of the power supply line to the data storage unit;
the data storage unit is used for storing voltage data of each phase of the power supply line;
and the data calling and transmitting unit is used for transmitting the voltage data of each phase of the power supply line to the control module respectively.
Further, the control module includes: a controller unit and a drive circuit;
the controller unit is used for determining a voltage compensation value of each phase of the power supply line according to voltage data of each phase of the power supply line, determining a compensation signal of each phase of the power supply line according to the voltage compensation value of each phase of the power supply line and transmitting the compensation signal of each phase of the power supply line to the driving circuit;
the driving circuit amplifies the compensation signals of each phase of the power supply line and transmits the amplified compensation signals of each phase of the power supply line to the compensation transformer module.
Further, the controller unit includes: three data receiving subunits, three comparison and judgment subunits and three instruction output subunits;
each data receiving subunit is used for receiving the voltage data of each phase of the power supply line transmitted by the corresponding sampling module and transmitting the single-phase voltage data in the voltage data of each phase of the power supply line to the corresponding comparison and judgment subunit;
each comparison judgment subunit is used for determining a voltage compensation value of a single-phase power supply line according to the voltage data of the single-phase power supply line corresponding to the comparison judgment subunit and transmitting the voltage compensation value of the single-phase power supply line to the corresponding instruction output subunit according to the voltage compensation value of the single-phase power supply line;
each instruction output subunit is used for generating a compensation signal of the corresponding single-phase power supply line according to the voltage compensation value of the corresponding single-phase power supply line, and transmitting the compensation signal of the corresponding single-phase power supply line to the driving circuit.
Further, the compensation transformer module includes: three single-phase compensation transformer modules;
each of the single-phase compensation transformer modules includes: the first compensation transformer, the second compensation transformer, the first switch circuit and the second switch circuit;
the primary side winding of the first compensation transformer is connected with a first switch circuit, and the primary side winding of the second compensation transformer is connected with a second switch circuit;
the input end of the power supply line, the secondary side winding of the first compensation transformer, the secondary side winding of the second compensation transformer and the output end of the power supply line are sequentially connected in series;
a first connecting terminal and a second connecting terminal are arranged on the primary side winding of the first compensation transformer;
a primary side winding of the second compensation transformer is provided with a third connecting terminal and a fourth connecting terminal;
the first switching circuit comprises a first switching device K1, a second switching device K2, a third switching device K3 and a fourth switching device K4;
the second switching circuit includes a fifth switching device K5, a sixth switching device K6, a seventh switching device K7, and an eighth switching device K8;
the first switch circuit and the second switch circuit are respectively connected with the driving circuit and used for conducting and switching off of each switch device according to the amplified compensation signals of each phase of the power supply line transmitted by the driving circuit.
Further, the first connection terminal is connected with a seventh connection terminal through a first switching device K1;
the first connection terminal is connected with a fifth connection terminal through a second switching device K2;
the second connection terminal is connected with a seventh connection terminal through a third switching device K3;
the second connecting terminal is connected with the fifth connecting terminal through a fourth switching device K4;
the third connecting terminal is connected with a seventh connecting terminal through a fifth switching device K5;
the third connecting terminal is connected with a sixth connecting terminal through a sixth switching device K6;
the fourth connection terminal is connected with a seventh connection terminal through a seventh switching device K7;
the fourth connection terminal is connected to the sixth connection terminal via an eighth switching device K8.
Further, the switching devices in the first switching circuit and the second switching circuit are power electronic switching devices;
the power electronic switch device is IGBT, silicon controlled rectifier or MOSFET.
Further, the controller unit is an embedded ARM PLC controller, a DSP controller or a single chip microcomputer.
The utility model adopts the above technical scheme, possess following beneficial effect at least:
the 10kV line voltage compensation device is constructed by the three-phase three-winding power-taking transformer, the sampling module, the control module and the compensation transformer module, on one hand, the independent adjustment of three-phase voltage can be realized, the adjustment has bidirectionality, the voltage condition of a 10kV power supply line can be improved under the condition of not greatly influencing the line current, and the problem that the voltage of the 10kV power supply line is too high or too low is solved; on the other hand, the volume is small, the cost is low, and the reliability is high.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a 10kv line voltage compensation device of the present invention;
fig. 2 is a schematic structural diagram of another 10kv line voltage compensation device of the present invention;
fig. 3 is a schematic structural diagram of a primary side winding of a three-phase three-winding power-taking transformer in another 10kv line voltage compensation device of the present invention;
fig. 4 is a schematic structural diagram of a secondary side winding of a three-phase three-winding power-taking transformer in another 10kv line voltage compensation device of the present invention;
fig. 5 is a schematic structural diagram of a sampling module in another 10kv line voltage compensation device of the present invention;
fig. 6 is a schematic structural diagram of a control module in another 10kv line voltage compensation device according to the present invention;
in the figure, 1-three-phase three-winding power-taking transformer, 2-sampling module, 3-control module, 4-compensation transformer module, 5-power supply line, 301-drive circuit, 302-controller unit, 401-first compensation transformer, 402-second compensation transformer, W1-primary winding of first compensation transformer, W2-secondary winding of first compensation transformer, W3-primary winding of second compensation transformer, W4-secondary winding of second compensation transformer, W5-primary winding of three-phase three-winding power-taking transformer, W6-secondary winding of three-phase three-winding power-taking transformer, D1-first connection terminal, D2-second connection terminal, D3-third connection terminal, D4-fourth connection terminal, d5 a fifth connection terminal, D6 a sixth connection terminal, D7 a seventh connection terminal, K1 a first switching device, K2 a first switching device, K3 a first switching device, K4 a first switching device, K5 a first switching device, K6 a first switching device, K7 a first switching device, K8 a first switching device, N-common neutral point.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Fig. 1 is a schematic diagram illustrating a 10kv line voltage compensation apparatus according to an exemplary embodiment. Referring to fig. 1, the apparatus includes: the three-phase three-winding power taking transformer comprises a three-phase three-winding power taking transformer, a sampling module, a control module and a compensating transformer module;
the three-phase three-winding electricity-taking transformer is connected in parallel to a power supply line, and the input end of the three-phase three-winding electricity-taking transformer is connected with the input end of the power supply line;
the output end of the three-phase three-winding power-taking transformer is respectively connected with the compensating transformer module and the sampling module;
the control module is respectively connected with the sampling module and the compensation transformer module;
the compensation transformer module is connected in series with a power supply line.
The embodiment of the utility model provides a 10kV line voltage compensation device constructs 10kV line voltage compensation device through three-phase three-winding power-taking transformer, sampling module, control module and compensating transformer module, on one hand, not only can realize independent adjustment of three-phase voltage, but also adjustment has bidirectionality, can improve the voltage condition of 10kV power supply line under the condition of not causing large-amplitude influence to line current, and solve the problem of too high or too low voltage of 10kV power supply line; on the other hand, the volume is small, the cost is low, and the reliability is high.
As an improvement to the above embodiment, the present invention provides another 10kv line voltage compensation apparatus, as shown in fig. 2, including: the three-phase three-winding power-taking transformer comprises a three-phase three-winding power-taking transformer 1, a sampling module 2, a control module 3 and a compensation transformer module 4;
the three-phase three-winding electricity-taking transformer 1 is connected in parallel to the power supply line 5, and the input end of the three-phase three-winding electricity-taking transformer 1 is connected with the input end of the power supply line 5;
the output end of the three-phase three-winding power-taking transformer 1 is respectively connected with the compensating transformer module 4 and the sampling module 2;
the control module 3 is respectively connected with the sampling module 2 and the compensation transformer module 4;
the compensation transformer module 4 is connected in series with a power supply line 5.
Note that the input terminal of the power supply line 5 includes a three-phase input terminal of the power supply line 5. In some embodiments, the three-phase input terminals of the power supply line 5 are: an a-phase input of the power supply line 5, a b-phase input of the power supply line 5, and a c-phase input of the power supply line 5.
It is easy to understand that the schematic structural diagram of the 10kv line voltage compensation device shown in fig. 2 is a schematic structural diagram of a single-phase line of the 10kv line voltage compensation device connected to the power supply line 5, that is, a schematic structural diagram of an a-phase line, a b-phase line and a c-phase line of the 10kv line voltage compensation device connected to the power supply line 5 respectively is shown in fig. 2.
Further optionally, the three-phase three-winding power-taking transformer 1 is used for providing voltage for the compensation transformer module 4 and providing voltage data of each phase of the power supply line 5 for the sampling module 2;
the sampling module 2 is used for collecting voltage data of each phase of the power supply line 5 and transmitting the voltage data of each phase of the power supply line 5 to the control module 3;
the control module 3 is used for determining compensation signals of each phase of the power supply line 5 according to voltage data of each phase of the power supply line 5 and transmitting the compensation signals of each phase of the power supply line 5 to the compensation transformer module 4;
and the compensation transformer module 4 is used for carrying out forward or reverse compensation on the voltage of each phase of the power supply line 5 according to the compensation signal of each phase of the power supply line 5.
It should be noted that, when performing voltage compensation on the voltage of each phase of the power supply line 5, it is necessary to adjust the voltage directions of the primary side and the secondary side of the compensation transformer, and when the voltage direction output by the compensation transformer is in the same phase as the voltage direction of the power supply line, it is forward compensation, and when the voltage direction output by the compensation transformer is opposite to the voltage direction of the power supply line, it is forward or reverse compensation on the voltage of each phase of the power supply line is achieved.
It is easy to understand that the device provided by the application comprises two compensation transformers, so that the device is in forward compensation when the voltage directions output by all the compensation transformers are in the same phase with the voltage direction of a power supply line; when the voltage directions output by all the compensation transformers are opposite to the voltage direction of the power supply line, reverse compensation is performed; when the voltage direction output by one compensation transformer is in phase with the voltage direction of the power supply line, and the voltage direction output by the other compensation transformer is in phase opposite to the voltage direction of the power supply line, the voltages output by the two compensation transformers can be mutually offset.
It is easily understood that three phases in the three-phase three-winding power-taking transformer 1 correspond to three-phase lines in the power supply line 5.
Further optionally, as shown in fig. 3, the primary winding W5 of the three-phase three-winding power-taking transformer 1 is a single winding, and is connected to the input end of the power supply line 5, and is configured to obtain a voltage from the power supply line 5;
as shown in fig. 4, the secondary winding W6 of the three-phase three-winding power-taking transformer 1 is a double winding, and is connected to the compensation transformer module 4 for providing voltage to the compensation transformer module 4;
each phase of a secondary side winding W6 of the three-phase three-winding power-taking transformer 1 comprises three output terminals, namely a fifth connecting terminal D5, a sixth connecting terminal D6 and a seventh connecting terminal D7;
a first group of secondary side winding coils are arranged between the fifth connecting terminal D5 and the sixth connecting terminal D6;
a second group of secondary side winding coils are arranged between the sixth connecting terminal D6 and the seventh connecting terminal D7;
the single-phase input end of the power supply line is the same as the fifth wiring terminal D5 and the sixth wiring terminal D6.
It is easily understood that a, b, and c in fig. 3 and 4 are a-phase, b-phase, and c-phase of the power feeding course 5, respectively.
In some embodiments, the single-phase input of the power supply line 5 is a same-name terminal as the fifth and sixth terminals D5 and D6.
It is easy to understand that the primary winding W5 of the three-phase three-winding power-taking transformer 1 is the input terminal of the three-phase three-winding power-taking transformer 1; the secondary side winding W6 of the three-phase three-winding power-taking transformer 1 is the output end of the three-phase three-winding power-taking transformer 1.
In some alternative embodiments, the turn ratio of the first set of winding coils to the second set of winding coils in the secondary winding W6 of the three-phase three-winding power-taking transformer 1 may be, but is not limited to, 1: 1.
further optionally, as shown in fig. 5, the sampling module 2 includes a voltage detection unit, a data storage unit, and a data invoking and transmitting unit;
the voltage monitoring unit is used for collecting the voltage data of each phase of the power supply line 5 provided by the three-phase three-winding power-taking transformer 1 and transmitting the collected voltage data of each phase of the power supply line 5 to the data storage unit;
the data storage unit is used for storing data of each phase voltage of the conversion power supply line 5;
and the data calling and transmitting unit is used for transmitting the voltage data of each phase of the power supply line 5 to the control module 3 respectively.
It should be noted that the embodiment of the present invention relates to a voltage data of each phase of a power supply line can be converted into a digital signal by a voltage monitoring unit, it is easy to understand that the digital signal is converted into a digital signal, and then the voltage value of each phase of the power supply line can be obtained, and the controller module can further determine the voltage compensation value according to the voltage value.
In some alternative embodiments, the model number of the sampling module 2 may be, but is not limited to, JSY-MK-141.
Further optionally, as shown in fig. 6, the control module 3 includes: a controller unit 302 and a control drive circuit 301;
a controller unit, which is used for determining the voltage compensation value of each phase of the power supply line 5 according to the voltage data of each phase of the power supply line 5, determining the compensation signal of each phase of the power supply line 5 according to the voltage compensation value of each phase of the power supply line 5 and transmitting the compensation signal of each phase of the power supply line 5 to the driving circuit 301;
the driving circuit 301 amplifies the compensation signal of each phase of the power supply line 5, and transmits the amplified compensation signal of each phase of the power supply line 5 to the compensation transformer module 4.
In some optional embodiments, after the controller unit receives the voltage data (or referred to as a voltage value) of the power supply line 5, the voltage data of the power supply line 5 is made to be a voltage sampling value, and the voltage reference value is subtracted from the voltage sampling value to obtain a voltage compensation value; if the voltage compensation value is a positive value, the reverse compensation voltage is required; if the voltage compensation value is a negative value, it indicates that a forward compensation voltage is required; and determining how many voltage values need to be compensated positively or negatively according to the positive and negative conditions of the voltage compensation value, and sending the voltage values to the driving circuit in the form of a compensation signal.
It should be noted that the size of the reference value and whether the reference value is a value or a range can be determined by one skilled in the art according to engineering requirements, expert experience or experimental data.
Further optionally, the controller unit comprises: three data receiving subunits, three comparison and judgment subunits and three instruction output subunits;
each data receiving subunit is used for receiving voltage data of each phase of the power supply line 5 transmitted by the corresponding sampling module 2, and transmitting single-phase voltage data in the voltage data of each phase of the power supply line 5 to the corresponding comparison judging subunit;
each comparison judgment subunit is used for determining a voltage compensation value of the single-phase power supply line according to the voltage data of the single-phase power supply line 5 corresponding to the comparison judgment subunit, and transmitting the voltage compensation value of the single-phase power supply line 5 to the instruction output subunit corresponding to the comparison judgment subunit;
each command output subunit is configured to generate a compensation signal for the power supply line 5 of the single phase corresponding thereto according to the voltage compensation value for the power supply line 5 of the single phase corresponding thereto, and transmit the compensation signal for the power supply line 5 of the single phase corresponding thereto to the drive circuit 301.
For example, assuming that the power supply line 5 includes an a-phase line, a b-phase line, and a c-phase line, the three data receiving subunits are an a-phase data receiving subunit, a b-phase data receiving subunit, and a c-phase data receiving subunit, respectively; the three comparison judgment subunits are respectively a comparison judgment subunit a, a comparison judgment subunit b and a comparison judgment subunit c; the three instruction output subunits are an a-phase instruction output subunit, a b-phase instruction output subunit and a c-phase instruction output subunit respectively.
In some optional embodiments, after the comparing and determining subunit receives the voltage data (or referred to as a voltage value) of the single-phase power supply line 5 corresponding to the comparing and determining subunit, the voltage data of the single-phase power supply line 5 corresponding to the comparing and determining subunit is made to be a voltage sampling value, the voltage reference value is subtracted from the voltage sampling value to obtain a voltage compensation value, and the voltage compensation value is transmitted to the instruction output subunit; if the voltage compensation value is a positive value, the reverse compensation voltage is required; if the voltage compensation value is a negative value, it indicates that a forward compensation voltage is required; the command output subunit determines how many voltage values need to be compensated positively or negatively according to the positive and negative conditions of the voltage compensation value, and sends the voltage values to the driving circuit in the form of compensation signals.
It should be noted that the size of the reference value and whether the reference value is a value or a range can be determined by one skilled in the art according to engineering requirements, expert experience or experimental data.
Further optionally, the compensation transformer module 4 includes: three single-phase compensation transformer modules 4;
each single-phase compensation transformer module 4 includes: a first compensation transformer 401, a second compensation transformer 402, a first switching circuit, and a second switching circuit;
the primary winding W1 of the first compensation transformer 401 is connected to a first switch circuit, and the primary winding W3 of the second compensation transformer 402 is connected to a second switch circuit;
the input end of the power supply line 5, the secondary winding W2 of the first compensating transformer 401, the secondary winding W4 of the second compensating transformer 402 and the output end of the power supply line 5 are sequentially connected in series;
a first connection terminal D1 and a second connection terminal D2 are provided on the primary winding W1 of the first compensation transformer 401;
a third connection terminal D3 and a fourth connection terminal D4 are provided on the primary winding W3 of the second compensation transformer 402;
the first switching circuit includes a first switching device K1, a second switching device K2, a third switching device K3, and a fourth switching device K4;
the second switching circuit includes a fifth switching device K5, a sixth switching device K6, a seventh switching device K7, and an eighth switching device K8;
the first switch circuit and the second switch circuit are respectively connected with the driving circuit 301, and are used for conducting on and off of each switch device according to the amplified compensation signal of each phase of the power supply line 5 transmitted by the driving circuit 301.
In some embodiments, the driving circuit 301, after receiving the compensation signal, turns on and off the switching devices in the first switching circuit and the second switching circuit according to the information in the compensation signal (how many voltage values need to be compensated in the positive direction or how many voltage values need to be compensated in the negative direction).
For example, assuming that a forward compensation voltage 100V is required, the compensation voltage 100V needs to control K1, K4, K5 and K8 to be turned on, and K2, K3, K6 and K7 to be turned off, the driving circuit may require the forward compensation voltage 100V to turn on K1, K4, K5 and K8 and turn off K2, K3, K6 and K7 according to the information in the compensation signal.
In some embodiments, when the switching device is a thyristor, the driving circuit generates a plurality of thyristor combinations to be switched on or switched off according to the voltage compensation signal through the thyristor in the thyristor group, so that the compensation transformer module can generate a voltage compensation value required by the power supply line, and the voltage is compensated into the power supply line, thereby increasing or reducing the terminal voltage of the 10kV line, and solving the problem that the voltage of the 10kV line is too high or too low.
It is easy to understand that the topology of the three single-phase compensation transformer modules 4 is completely symmetrical.
In some optional embodiments, the turn ratio of the primary winding, the first set of secondary winding coils, and the second set of secondary windings of the three-phase three-winding power-taking transformer 1 is 10: 0.4: 0.4, the turn ratio of the primary winding to the secondary winding of the first compensation transformer 401 is 25: 8, the turn ratio of the primary winding to the secondary winding of the second compensation transformer 402 is 25: when the number of turns is above, the voltage regulation has four gears, and the specific compensation principle is as follows:
when the switching devices K1, K4, K5, and K8 of the switching circuit are closed, the voltage compensation amplitude is: + 37.5%;
when the switching devices K2, K3, K6, and K7 of the switching circuit are closed, the voltage compensation amplitude is: -37.5%;
when the switching devices K2, K3, K5, and K8 of the switching circuit are closed, the voltage compensation amplitude is: + 12.5%;
when the switching devices K1, K4, K6, and K7 of the switching circuit are closed, the voltage compensation amplitude is: -12.5%.
It should be noted that the gear of the voltage regulation is determined by the winding turns ratio of the three-phase three-winding power transformer 1, the primary winding turns ratio of the first compensation transformer 401, and the secondary winding turns ratio of the second compensation transformer 402, and therefore the gear of the voltage regulation is only one of the specific embodiments.
It should be noted that in this embodiment, each single-phase voltage compensation module connects the secondary windings of two compensation transformers connected in series to the power supply line 5, and the control module 3 determines, according to the voltage data of each phase of the power supply line 5 collected by the sampling module 2, a range in which each phase voltage is located to generate a corresponding compensation signal, so as to reasonably switch the primary windings of the first compensation transformer 401 and the second compensation transformer 402, thereby implementing voltage compensation of the power line. The device that this embodiment provided not only can realize the independent regulation of three-phase voltage, and adjust and have the bidirectionality, can solve 10kV power supply line 5 electric energy quality problems such as too high or low excessively of voltage simultaneously.
Further alternatively, the first connection terminal D1 is connected to the seventh connection terminal D7 via a first switching device K1;
the first connection terminal D1 is connected to the fifth connection terminal D5 via a second switching device K2;
the second connection terminal D2 is connected to a seventh connection terminal D7 via a third switching device K3;
the second connection terminal D2 is connected to the fifth connection terminal D5 via a fourth switching device K4;
the third connection terminal D3 is connected to the seventh connection terminal D7 via a fifth switching device K5;
the third connection terminal D3 is connected to the sixth connection terminal D6 via a sixth switching device K6;
the fourth connection terminal D4 is connected to the seventh connection terminal D7 via a seventh switching device K7;
the fourth connection terminal D4 is connected to the sixth connection terminal D6 via an eighth switching device K8.
Further optionally, the switching devices in the first switching circuit and the second switching circuit are power electronic switching devices;
the power electronic switch device is IGBT, silicon controlled rectifier or MOSFET.
Further optionally, the controller unit is an embedded ARM PLC controller, a DSP controller, or a single chip microcomputer.
The embodiment of the utility model provides another kind of 10kV circuit voltage compensation arrangement, in the secondary side winding series connection access power supply line 5 of two compensating transformers that will establish ties, voltage regulation part is at compensating transformer's primary side winding, through the primary side winding of the first compensating transformer 401 of switching and second compensating transformer 402 during voltage regulation, realizes exchanging the voltage regulation compensation. During adjustment, the secondary side windings of the two compensation transformers have no breakpoints or power failure, can be continuously jump-adjusted, and are safe and reliable, and compared with the existing step-by-step compensation technology, the step-by-step compensation method is more flexible and wider in application range.
The embodiment of the utility model provides a switching circuit of another kind of 10kV circuit voltage compensation arrangement's switching compensating transformer primary winding adopts relay or power electronic switch device switching, does not have mechanical contact and adjusts, and full-automatic, non-maintaining design adopt the zero passage switching, and no inrush current, reaction time is short, can unmanned on duty, remote monitoring, degree of automation height.
The embodiment of the utility model provides another kind of 10kV circuit voltage compensation arrangement's compensating transformer module 4 adopts two compensating transformers to compensate in coordination, does not change transmission line's impedance at voltage regulation's overall process, and transmission of electricity quality is high. Different from the above, in the prior art, when the compensation transformer is in an uncompensated state and exists in the power transmission line without adjusting the voltage, it is equivalent to that one end winding is connected in series in the power transmission line, so that a certain impedance exists, and the voltage in a normal range can have a certain voltage drop through the power transmission line winding, which affects the power transmission quality.
The embodiment of the utility model provides another 10kV circuit voltage compensation arrangement, connect the equipment series into the circuit operation, can improve the voltage condition of 10kV power supply line 5 under the condition that does not cause the circuit current to influence by a wide margin; the cost is low and the reliability is high; under the condition of load fluctuation, the influence of line distributed parameters in the long-distance transmission process can be effectively eliminated, the line loss is reduced, and the power utilization quality of end users is guaranteed.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A 10kv line voltage compensation apparatus, characterized in that the apparatus comprises: the three-phase three-winding power taking transformer comprises a three-phase three-winding power taking transformer, a sampling module, a control module and a compensating transformer module;
the three-phase three-winding electricity-taking transformer is connected in parallel to a power supply line, and the input end of the three-phase three-winding electricity-taking transformer is connected with the input end of the power supply line;
the output end of the three-phase three-winding power-taking transformer is respectively connected with the compensating transformer module and the sampling module;
the control module is respectively connected with the sampling module and the compensating transformer module;
and the compensation transformer module is connected in series with a power supply line.
2. The 10kv line voltage compensation device according to claim 1, wherein the three-phase three-winding power-taking transformer is used for providing voltage for the compensation transformer module and providing voltage data of each phase of a power supply line for the sampling module;
the sampling module is used for collecting voltage data of each phase of the power supply line and transmitting the voltage data of each phase of the power supply line to the control module;
the control module is used for determining compensation signals of all phases of the power supply line according to voltage data of all phases of the power supply line and transmitting the compensation signals of all phases of the power supply line to the compensation transformer module;
and the compensation transformer module is used for carrying out forward or reverse compensation on the voltage of each phase of the power supply line according to the compensation signal of each phase of the power supply line.
3. A10 kv line voltage compensation device according to claim 2,
the primary side winding of the three-phase three-winding power-taking transformer is a single winding, is connected with the input end of a power supply line and is used for acquiring voltage from the power supply line;
the secondary side winding of the three-phase three-winding power-taking transformer is a double winding, is connected with the compensation transformer module and is used for providing voltage for the compensation transformer module;
each phase of a secondary side winding of the three-phase three-winding power-taking transformer comprises three output terminals, wherein the three output terminals are a fifth wiring terminal, a sixth wiring terminal and a seventh wiring terminal;
a first group of secondary side winding coils are arranged between the fifth connecting terminal and the sixth connecting terminal;
and a second group of secondary side winding coils are arranged between the sixth connecting terminal and the seventh connecting terminal.
4. The 10kv line voltage compensation device of claim 3, wherein the sampling module comprises a voltage detection unit, a data storage unit, a data calling and transmitting unit;
the voltage monitoring unit is used for collecting the voltage data of each phase of the power supply line provided by the three-phase three-winding power-taking transformer and transmitting the collected voltage data of each phase of the power supply line to the data storage unit;
the data storage unit is used for storing voltage data of each phase of the power supply line;
and the data calling and transmitting unit is used for transmitting the voltage data of each phase of the power supply line to the control module respectively.
5. The 10kv line voltage compensation device of claim 4, wherein the control module comprises: a controller unit and a drive circuit;
the controller unit is used for determining a voltage compensation value of each phase of the power supply line according to voltage data of each phase of the power supply line, determining a compensation signal of each phase of the power supply line according to the voltage compensation value of each phase of the power supply line and transmitting the compensation signal of each phase of the power supply line to the driving circuit;
the driving circuit amplifies the compensation signals of each phase of the power supply line and transmits the amplified compensation signals of each phase of the power supply line to the compensation transformer module.
6. The 10kv line voltage compensation device of claim 5, wherein the controller unit comprises: three data receiving subunits, three comparison and judgment subunits and three instruction output subunits;
each data receiving subunit is used for receiving the voltage data of each phase of the power supply line transmitted by the corresponding sampling module and transmitting the single-phase voltage data in the voltage data of each phase of the power supply line to the corresponding comparison and judgment subunit;
each comparison judgment subunit is used for determining a voltage compensation value of a single-phase power supply line according to the voltage data of the single-phase power supply line corresponding to the comparison judgment subunit and transmitting the voltage compensation value of the single-phase power supply line to the corresponding instruction output subunit according to the voltage compensation value of the single-phase power supply line;
each instruction output subunit is used for generating a compensation signal of the corresponding single-phase power supply line according to the voltage compensation value of the corresponding single-phase power supply line, and transmitting the compensation signal of the corresponding single-phase power supply line to the driving circuit.
7. The 10kv line voltage compensation device of claim 5, wherein the compensation transformer module comprises: three single-phase compensation transformer modules;
each of the single-phase compensation transformer modules includes: the first compensation transformer, the second compensation transformer, the first switch circuit and the second switch circuit;
the primary side winding of the first compensation transformer is connected with a first switch circuit, and the primary side winding of the second compensation transformer is connected with a second switch circuit;
the input end of the power supply line, the secondary side winding of the first compensation transformer, the secondary side winding of the second compensation transformer and the output end of the power supply line are sequentially connected in series;
a first connecting terminal and a second connecting terminal are arranged on the primary side winding of the first compensation transformer;
a primary side winding of the second compensation transformer is provided with a third connecting terminal and a fourth connecting terminal;
the first switching circuit comprises a first switching device K1, a second switching device K2, a third switching device K3 and a fourth switching device K4;
the second switching circuit includes a fifth switching device K5, a sixth switching device K6, a seventh switching device K7, and an eighth switching device K8;
the first switch circuit and the second switch circuit are respectively connected with the driving circuit and used for conducting and switching off of each switch device according to the amplified compensation signals of each phase of the power supply line transmitted by the driving circuit.
8. A10 kv line voltage compensation device according to claim 7,
the first connecting terminal is connected with a seventh connecting terminal through a first switching device K1;
the first connection terminal is connected with a fifth connection terminal through a second switching device K2;
the second connection terminal is connected with a seventh connection terminal through a third switching device K3;
the second connecting terminal is connected with the fifth connecting terminal through a fourth switching device K4;
the third connecting terminal is connected with a seventh connecting terminal through a fifth switching device K5;
the third connecting terminal is connected with a sixth connecting terminal through a sixth switching device K6;
the fourth connection terminal is connected with a seventh connection terminal through a seventh switching device K7;
the fourth connection terminal is connected to the sixth connection terminal via an eighth switching device K8.
9. A10 kv line voltage compensation device according to claim 7,
the switching devices in the first switching circuit and the second switching circuit are power electronic switching devices;
the power electronic switch device is IGBT, silicon controlled rectifier or MOSFET.
10. The 10kv line voltage compensation device of claim 5, wherein the controller unit is an embedded ARM PLC controller, a DSP controller or a single chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021869139.7U CN213027453U (en) | 2020-08-31 | 2020-08-31 | 10kv line voltage compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021869139.7U CN213027453U (en) | 2020-08-31 | 2020-08-31 | 10kv line voltage compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213027453U true CN213027453U (en) | 2021-04-20 |
Family
ID=75473809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021869139.7U Active CN213027453U (en) | 2020-08-31 | 2020-08-31 | 10kv line voltage compensation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213027453U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11492887B2 (en) | 2019-06-13 | 2022-11-08 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Power supply semi-trailer for electric drive fracturing equipment |
| US11677238B2 (en) | 2021-04-26 | 2023-06-13 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Electric power supply method and electric power supply system |
| US11680474B2 (en) | 2019-06-13 | 2023-06-20 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and control method thereof, fracturing system |
| US11746636B2 (en) | 2019-10-30 | 2023-09-05 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and control method thereof, fracturing system |
| US12021389B2 (en) | 2021-10-12 | 2024-06-25 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Power supply system for electrically driven wellsite facility |
-
2020
- 2020-08-31 CN CN202021869139.7U patent/CN213027453U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11492887B2 (en) | 2019-06-13 | 2022-11-08 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Power supply semi-trailer for electric drive fracturing equipment |
| US11680474B2 (en) | 2019-06-13 | 2023-06-20 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and control method thereof, fracturing system |
| US11746636B2 (en) | 2019-10-30 | 2023-09-05 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and control method thereof, fracturing system |
| US11677238B2 (en) | 2021-04-26 | 2023-06-13 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Electric power supply method and electric power supply system |
| US12021389B2 (en) | 2021-10-12 | 2024-06-25 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Power supply system for electrically driven wellsite facility |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213027453U (en) | 10kv line voltage compensation device | |
| CN204391761U (en) | Flexible medium-voltage direct-current power distribution system | |
| CN102739080B (en) | Direct current de-icing device based on full-bridge modular multilevel converter | |
| CN107181413A (en) | Mixed type direct current power electronic transformer | |
| CN110277788B (en) | Composite compensation device for long-distance sparse power supply | |
| CN102820672B (en) | Flexible direct current transmission system connected with alternating current power grids of different voltage classes | |
| CN101621254A (en) | Power electronic transformer applied to distribution network | |
| WO2021115019A1 (en) | Sea island power transmission system and control method therefor | |
| CN107645178B (en) | Virtual synchronous machine control system and method based on power electronic transformer | |
| CN103269083A (en) | Multi-terminal high-voltage direct-current power transmission system | |
| CN102983584A (en) | Unified power flow controller used for unbalanced system | |
| WO2022213525A1 (en) | Ac-ac converter | |
| CN104578132A (en) | Electric power collector system for alternating-current and direct-current microgrid | |
| CN112653149A (en) | High-power electric energy router suitable for low-voltage distribution network | |
| CN101615847B (en) | Automatic voltage regulator based on electric power electronic transformer | |
| CN110350797A (en) | A kind of very bipolar mesolow transformer topology and its control strategy based on TAB | |
| CN116488224A (en) | Multiport alternating current-direct current hybrid converter device and multiport alternating current-direct current hybrid system | |
| CN105391079A (en) | Power transfer type balanced power supply system and method based on new energy interconnection | |
| CN204392098U (en) | A kind of Monophase electric power electronic transformer and application system thereof | |
| CN111934324B (en) | Multifunctional power flow controller suitable for multi-channel double-loop | |
| CN103236693B (en) | Unified electric energy quality controller | |
| CN210062722U (en) | Electrified railway cophase traction power supply system | |
| CN111756045A (en) | Three-in-one power electronic compensation transformer substation | |
| CN106533221A (en) | High-power universal PWM rectifier and control method thereof | |
| CN208433914U (en) | A kind of more level isolation type bidirectional DC/DC translation circuits |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |