Modularized bypass on-load voltage regulation device for middle and rear sections of long line
The modular design of the on-load tap changer for the middle and later sections of long lines solves the problem of voltage fluctuation in long lines, realizes bidirectional adjustment of voltage amplitude, reduces costs and improves the reliability and safety of the equipment.
Patent Information
- Application Number
- CN202423117708.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-17
AI Technical Summary
Long power lines suffer from overvoltage during low-load periods and undervoltage during high-load periods. Existing solutions are costly, have high losses, and cannot effectively address voltage fluctuations. Building new substations is also costly.
The modular on-load tap changer for the middle and lower sections of long lines adopts a modular design, including an incoming module, an outgoing module, and a series tap changer module. It achieves bidirectional voltage adjustment through the tap changer and windings, and the inclusion of bypass and incoming units improves the availability and safety of the device.
It effectively achieves bidirectional adjustment of voltage amplitude, reduces costs, improves the reliability and safety of the device, avoids fire risks, and is suitable for scenarios such as long lines exceeding 15km and reverse transmission of small hydropower green electricity.
Smart Images
Figure CN223680754U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of distribution network, in particular to a long line middle and later section modularization bypass load voltage regulating device. BACKGROUND
[0002] At present, the 15km above 10kV long line remote area distribution line user has been the problem of distribution network application. Among them, the low load period power supply is serious overvoltage, and the high load period power supply is serious low voltage, the highest difference is more than 100V, and there are also small hydropower and other green electricity on-line full-load high voltage, low voltage and other conditions. In view of the above situation, a 110kV or 35kV substation needs to be specially constructed, and the investment is at least 30 million yuan, but the investment and the load ratio are seriously wasted; or the end load voltage regulating or reactive power compensation method is used, or the distribution transformer is simply replaced, but the number of required equipment is large; increasing the wire section exists the problem of not being able to be radically solved, and the voltage fluctuation of the long line end is not effectively solved.
[0003] The existing 380V low-voltage reactive power compensation (comprehensive treatment of power quality, LVR), rectifier voltage (flexible DC comprehensive voltage regulation, FVR), energy storage voltage, green electricity, etc., single-variable reactive power compensation, load voltage regulating distribution transformer, etc. Single-variable voltage regulation, series connection line voltage regulating device adjusts the middle and rear end voltage, and newly builds a substation voltage regulating section bus, but the low-voltage cost is too high, the loss is too large, and the overall improvement is small; while the cost of newly built substation is the highest, the cost performance is low, and the reliability is high. INVENTION CONTENTS
[0004] The technical problem to be solved by the utility model is that a long line middle and later section modularization bypass load voltage regulating device can effectively realize bidirectional adjustment of voltage amplitude.
[0005] In order to solve the above technical problem, the utility model adopts the technical scheme that:
[0006] A long line middle and later section modularization bypass load voltage regulating device, comprising an incoming line module, an outgoing line module and a series connection voltage regulating module; the series connection voltage regulating module comprises a voltage regulator and a winding; the outgoing line end of the voltage regulator is connected with the middle position of the winding; the two sides of the middle position of the winding are respectively used as the input end and the output end of the series connection voltage regulating module; the incoming line end of the incoming line module is used for being connected with an incoming line voltage bus; the gear output end of the incoming line module is connected with the input end of the series connection voltage regulating module, and the output end of the series connection voltage regulating module is connected with the gear input end of the outgoing line module; the detection end of the series connection voltage regulating module is connected with the voltage detection end of the incoming line module and the voltage detection end of the outgoing line module respectively; and the outgoing line end of the outgoing line module is used for being connected with an outgoing line voltage bus.
[0007] Further, the incoming line module comprises a bypass unit and an incoming line unit; the incoming line end of the bypass unit and the incoming line end of the incoming line unit are respectively used for connecting with an incoming line voltage bus; the gear output end of the incoming line unit is connected with the input end of the series voltage regulating module; the voltage regulating end of the incoming line unit is connected with the voltage regulating output end of the series voltage regulating module; the outgoing line end of the bypass unit is used for connecting with an outgoing line voltage bus.
[0008] Further, an electrical and mechanical interlock is arranged between the bypass unit and the incoming line unit.
[0009] Further, the incoming line unit comprises an incoming line component, an outgoing line component and a voltage bus; the input end of the incoming line component is used for connecting with an incoming line voltage bus; the voltage regulating end of the incoming line component is connected with the voltage regulating output end of the series voltage regulating module; the output end of the incoming line component is connected with the voltage bus; the input end of the outgoing line component is connected with the voltage bus; the gear output end of the outgoing line component is connected with the input end of the series voltage regulating module.
[0010] Further, the incoming line component comprises a current transformer and a switch; the input end of the current transformer is used for connecting with an incoming line voltage bus; the output end of the current transformer is connected with one end of the switch; the other end of the switch is connected with the voltage bus gating.
[0011] Further, the incoming line component further comprises a protection device, a live display and an ammeter; the protection device, the live display and the ammeter are respectively arranged on the main circuit of the current transformer as independent branches.
[0012] Further, the incoming line module further comprises a voltage mutual component; the main circuit of the voltage mutual component is provided with a voltmeter; the input end of the voltage mutual component is connected with the voltage bus; the output end of the voltage mutual component is connected with the detection end of the series voltage regulating module.
[0013] Further, the voltage mutual component comprises a voltage transformer and a fuse; the input end of the fuse is connected with the voltage bus; the output end of the fuse is connected with the input end of the current transformer; the output end of the voltage transformer is connected with the detection end of the series voltage regulating module.
[0014] Further, the outgoing line module comprises an outgoing line unit, a reserved access unit and a voltage bus; the input end of the outgoing line unit is connected with the gear output end of the series voltage regulating module; the output end of the outgoing line unit is connected with the voltage bus and is used for being connected with an outgoing line voltage bus; the voltage regulating end of the outgoing line unit is connected with the voltage regulating output end of the series voltage regulating module; the input end of the reserved access unit is connected with the voltage bus; and the output end of the reserved access unit serves as a reserved output interface.
[0015] Further, the reserved access unit comprises at least two outgoing line components; the input end of all the outgoing line components is connected with the voltage bus; and the output end of each outgoing line component serves as a reserved output interface.
[0016] The device has the advantages that: the device is modularly designed and comprises an incoming line module, an outgoing line module and a series voltage regulating module; after the incoming line voltage is input through the incoming line module, the voltage of the incoming line module and the outgoing line module is detected through the series voltage regulating module, and the voltage input by the incoming line module is converted according to the actual output voltage by the series voltage regulating module serving as a transformer and then is output to the outgoing line module; meanwhile, the outgoing end of the voltage regulator is connected with the middle position of the winding, and the two sides of the middle position of the winding are respectively taken as the input end and the output end of the series voltage regulating module, so that the voltage is adjusted by adjusting the connection position of the incoming line module, the outgoing line module and the winding, and the voltage amplitude can be effectively adjusted bidirectionally. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 FIG. 1 is a module schematic view of a long line middle and rear section modular bypass on-load voltage regulating device in the embodiment;
[0018] Figure 2 FIG. 2 is a long line series voltage regulating main wiring schematic view of the long line middle and rear section modular bypass on-load voltage regulating device in the embodiment;
[0019] Figure 3 FIG. 3 is an incoming line module structure schematic view of the long line middle and rear section modular bypass on-load voltage regulating device in the embodiment;
[0020] Figure 4 FIG. 4 is an outgoing line module structure schematic view of the long line middle and rear section modular bypass on-load voltage regulating device in the embodiment;
[0021] Label explanation:
[0022] 1, incoming line module; 11, bypass unit; 12, incoming line unit; 121, incoming line component; 122, outgoing line component; 123, voltage bus; 124, voltage mutual inductor component; 2, outgoing line module; outgoing line unit 21, reserved access unit 22; 3, series voltage regulating module; 31, voltage regulator; 32, winding;
[0023] TA, current transformer; S, switch; FB, arrester; QS, circuit breaker; XS, live display; DLB, ammeter; DVB, voltmeter; TF, voltage transformer; R, fuse; M, motor. DETAILED DESCRIPTION
[0024] To illustrate the technical content of the utility model, the purposes and effects achieved, the following will be described in conjunction with the embodiments and the accompanying drawings.
[0025] For the 15km above 10kV long line remote area distribution line setting, from the cost performance, different schemes are suitable for different ranges: individual low-voltage users use 380V low-voltage small point voltage regulation, more than 10 households use district large point or village area voltage regulation below 3 centralized districts, more than 3 centralized districts use 10kV line middle and rear end line village area voltage regulation, and conditions allow can use 35kV or 110kV substation area, regional, county bus voltage regulation.
[0026] For the total capacity not reaching the distribution point substation, single long line more than 15km, total load not more than 10MVA, a series of line voltage regulating device is proposed to adjust the middle and rear end voltage regulation, realize the overall intermediate voltage support method, and the voltage bus of the substation is translated by 5~15km to support the two-way regulation again, so as to eliminate the end low / high voltage problem. The intermediate voltage support is the most economical and optimal solution, realizes the wide voltage regulation voltage support method and load guarantee measure, and proposes a primary and secondary scheme implementation scheme, which completely solves the voltage fluctuation problem in remote areas, pastoral areas and E, F type load area, and the problem of high voltage grade substation with no income in power grid investment, which can greatly improve the user's power perception and propose a practical and economic solution.
[0027] The present series of line voltage regulating device adjustment middle and rear end voltage regulation scheme has: oil-immersed series on-load voltage regulating station scheme, power electronic voltage regulating scheme.
[0028] However, the above scheme has the following problems:
[0029] 1) Fire performance: oil-immersed series on-load voltage regulating station scheme, once the oil-immersed voltage regulator fails in remote areas, A class is easy to produce deflagration, causing forest fire, and will continue to burn.
[0030] 2) Protection: the voltage regulating transformer relies on overload protection, which causes the turn-to-turn short circuit to expand greatly before tripping, and the oil-immersed voltage regulator mainly passes through the current, cannot adopt inverse time limit or differential protection, and must set deflagration in case of fire.
[0031] 3) Reliability: once the power electronic voltage regulating scheme has any problem in primary / secondary control equipment, the whole set must be taken out of operation.
[0032] 4) Cost: The cost of the power electronic voltage regulation scheme is twice that of the oil-immersed series on-load voltage regulation scheme.
[0033] 5) Maintenance: The power electronic voltage regulation scheme cannot be maintained on one side with power off.
[0034] 6) No reserved interface: In remote areas with light load and wide range, multiple loops / branches are needed; the incoming and outgoing lines are clear, the management cost is low, and it is not easy to go wrong.
[0035] A long line middle and late section modular bypass on-load voltage regulation device, comprising an incoming line module, an outgoing line module and a series voltage regulation module; the series voltage regulation module comprises a voltage regulator and a winding; the outgoing line end of the voltage regulator is connected to the middle position of the winding; the two sides of the middle position of the winding are respectively used as the input end and the output end of the series voltage regulation module; the incoming line end of the incoming line module is used for connecting with an incoming line voltage bus; the gear output end of the incoming line module is connected with the input end of the series voltage regulation module, and the output end of the series voltage regulation module is connected with the gear input end of the outgoing line module; the detection end of the series voltage regulation module is connected with the voltage detection end of the incoming line module and the voltage detection end of the outgoing line module respectively; the outgoing line end of the outgoing line module is used for connecting with an outgoing line voltage bus.
[0036] As can be known from the above description, the device is designed in a modular manner, comprising an incoming line module, an outgoing line module and a series voltage regulation module; after the incoming line voltage is input through the incoming line module, the voltage of the incoming line module and the outgoing line module is detected through the series voltage regulation module, and the voltage input by the incoming line module is converted according to the actual output voltage by the series voltage regulation module as a transformer, and then output to the outgoing line module; at the same time, the outgoing line end of the voltage regulator is connected to the middle position of the winding, and the two sides of the middle position of the winding are respectively used as the input end and the output end of the series voltage regulation module, so that the connection position of the incoming line module, the outgoing line module and the winding is adjusted to realize voltage rise and fall adjustment, and the voltage amplitude can be effectively adjusted in both directions.
[0037] Further, the incoming line module comprises a bypass unit and an incoming line unit; the incoming line end of the bypass unit and the incoming line end of the incoming line unit are respectively used for connecting with an incoming line voltage bus; the gear output end of the incoming line unit is connected with the input end of the series voltage regulation module; the voltage regulation end of the incoming line unit is connected with the voltage regulation output end of the series voltage regulation module; and the outgoing line end of the bypass unit is used for connecting with an outgoing line voltage bus.
[0038] As can be known from the above description, by arranging the bypass unit and the incoming line unit, when the incoming line unit cannot output due to abnormality, the bypass unit can output, thereby improving the availability of the device.
[0039] Further, an electrical and mechanical interlock is arranged between the bypass unit and the incoming line unit.
[0040] As described above, by arranging an electrical and mechanical interlock between the bypass unit and the incoming line unit, when the electrical parameters of the bypass unit circuit and the incoming line unit circuit are different, the closing is ensured, and the self-coupling voltage regulating device is not burned due to the short circuit of the regulating winding.
[0041] Further, the incoming line unit comprises an incoming line assembly, an outgoing line assembly and a voltage bus; the input end of the incoming line assembly is used to be connected with the incoming line voltage bus; the regulating end of the incoming line assembly is connected with the regulating output end of the series regulating module; the output end of the incoming line assembly is connected with the voltage bus; the input end of the outgoing line assembly is connected with the voltage bus; and the output end of the outgoing line assembly is connected with the gear input end of the series regulating module.
[0042] As described above, by arranging the incoming line assembly to access the incoming line voltage bus, and then passing through the voltage bus and outputting by the outgoing line assembly, compared with directly outputting by the incoming line assembly, the safety of the device is improved.
[0043] Further, the incoming line assembly comprises a current transformer and a switch; the input end of the current transformer is used to be connected with the incoming line voltage bus; the output end of the current transformer is connected with one end of the switch; and the other end of the switch is connected with the voltage bus gating.
[0044] As described above, by arranging the current transformer and the switch to form the access main circuit, the electrical energy transmission can be effectively performed, and the circuit safety is improved by controlling the circuit through the switch.
[0045] Further, the incoming line assembly further comprises a protection device, a live display and an ammeter; the protection device, the live display and the ammeter are respectively arranged on the main circuit of the current transformer as independent branches.
[0046] As described above, by arranging the protection device, the protection effect on the main circuit can be achieved, and the ammeter is arranged to monitor the current on the circuit, and the live display is used to warn the device live during the operation of the device.
[0047] Further, the incoming line module further comprises a voltage mutual inductor assembly; the main circuit of the voltage mutual inductor assembly is provided with a voltmeter; the input end of the voltage mutual inductor assembly is connected with the voltage bus; and the output end of the voltage mutual inductor assembly is connected with the detection end of the series regulating module.
[0048] From the above description, by setting the voltage mutual inductor assembly, the voltage of the incoming line module can be monitored and transmitted to the series voltage regulating module, so that the series voltage regulating module can effectively control the voltage range according to the monitoring value.
[0049] Further, the voltage mutual inductor assembly comprises a voltage mutual inductor and a fuse; the input end of the fuse is connected with the voltage bus; the output end of the fuse is connected with the input end of the current mutual inductor; the output end of the voltage mutual inductor is connected with the detection end of the series voltage regulating module.
[0050] From the above description, by setting the current mutual inductor, the bus voltage can be effectively obtained, and the corresponding value is monitored by the voltmeter, and the fuse plays a protective role on the voltage mutual inductor assembly.
[0051] Further, the outgoing line module comprises an outgoing line unit, a reserved access unit and a voltage bus; the input end of the outgoing line unit is connected with the range output end of the series voltage regulating module; the output end of the outgoing line unit is connected with the voltage bus and is used for being connected with the outgoing line voltage bus; the voltage regulating end of the outgoing line unit is connected with the voltage regulating output end of the series voltage regulating module; the input end of the reserved access unit is connected with the voltage bus; and the output end of the reserved access unit serves as a reserved output interface.
[0052] From the above description, by setting the outgoing line unit, the output is realized, and the voltage bus and the reserved access unit are connected, so that the output end of the reserved access unit can serve as a reserved output interface, and multi-port output is realized.
[0053] Further, the reserved access unit comprises at least two outgoing line assemblies; the input end of all the outgoing line assemblies is connected with the voltage bus; and the output end of each outgoing line assembly serves as a reserved output interface.
[0054] From the above description, by setting multiple groups of outgoing line assemblies, multi-end current sampling can be realized through different outgoing line assemblies.
[0055] The long-line middle and rear section modular bypass on-load voltage regulating device can be applied to the scenario of a power distribution network exceeding 15 km and above long lines or exceeding 10 km dumbbell type load lines or scenarios of short-term concentrated load caused by small hydropower, photovoltaic and other green electricity reverse transmission or obvious seasonality, holidays, irrigation, breeding and the like, which will be described below through specific embodiments.
[0056] Embodiment one
[0057] Please refer to Figure 1 and Figure 2The application discloses a long-line middle and rear section modular bypass on-load voltage regulating device, which comprises an incoming line module 1, an outgoing line module 2 and a series voltage regulating module 3; the series voltage regulating module 3 comprises a voltage regulator 31 and a winding 32; the outgoing line of the voltage regulator 31 is connected with the middle position of the winding 32; the middle position of the winding 32 is respectively used as the input end and the output end of the series voltage regulating module 3; that is, the outgoing line of the voltage regulator 31 is connected with the middle position of the winding 32, and the voltage can be raised or lowered by the voltage tap distribution on both sides of the voltage; meanwhile, the series voltage regulating module 3 is connected in series with the self-coupled on-load voltage regulating device in the line, and the voltage step tap is used for gear adjustment under the condition of no power-off load, so that the purpose of regulating and controlling the voltage of the primary coil and the secondary coil on both sides is achieved, and the device is ensured to operate in a relatively fixed range. The voltage regulator 31 is used for sampling voltage, and the delay is 0-300s (the setting range), the on-load switch S motor M is controlled to adjust the gear, and the purpose of controlling the voltage is achieved. The incoming line end of the incoming line module 1 is used for being connected with the incoming line voltage bus; the gear output end of the incoming line module 1 is connected with the input end of the series voltage regulating module 3, the output end of the series voltage regulating module 3 is connected with the gear input end of the outgoing line module 2, the detection end of the series voltage regulating module 3 is connected with the voltage detection end of the incoming line module 1 and the voltage detection end of the outgoing line module 2 respectively, and the outgoing line end of the outgoing line module 2 is used for being connected with the outgoing line voltage bus. For example, when the voltage is adjusted: the rear end is controlled at 10.5kV, the voltage is adjusted by 2% per phase, the step is 2.5% (the voltage regulating margin is 0.5%), the delay is 0-300s and is adjustable (the recommended setting is 60s), and when the voltage difference between the incoming line end and the outgoing line end is greater than 17%, the gear adjustment is prohibited, the voltage difference between the incoming line end and the outgoing line end is greater than 17%, the gear adjustment is prohibited, the gear adjustment is locked for 300s after three times of continuous gear adjustment, and the other feeders are used with respective protections without linkage. The device is a standard part upgrade application, realizes the standard access mode of the long-line series voltage regulating device, has a capacity of 1000kVA-10MVA and is connected in full capacity. The series voltage regulating module 3 adopts a H-grade full-insulation dry type edge-pouring voltage regulating transformer, the box body has a protection grade of IP55 and above, is provided with one main and one standby air conditioning device, ensures the operation environment, avoids condensation and dust accumulation and greatly increases the maintenance period; realizes oil-free equipment, high-sensitivity differential protection and flame-retardant equipment, and completely eliminates the electrical fire. Meanwhile, the series voltage regulating module 3 is different from the electronic voltage regulating device, that is, even in the case that all the secondary controls are completely disabled, the voltage regulator 31 can still realize manual handle mechanical voltage regulation; and the overall cost of the series voltage regulating module 3 is 2 / 3 of the electronic voltage regulating device and is 1.5 times of the oil-immersed type, but the fire and explosion possibility is eliminated.
[0058] Please refer to Figure 3The difference between the incoming line module 1 and the traditional two-in and two-out standard ring network cabinet lies in that the voltage bus 123 port is divided into a bypass unit 11 and an incoming line unit 12; the incoming line end of the bypass unit 11 and the incoming line end of the incoming line unit 12 are respectively used for being connected with the incoming line voltage bus; the gear output end of the incoming line unit 12 is connected with the input end of the series voltage regulating module 3; the voltage regulating end of the incoming line unit 12 is connected with the voltage regulating output end of the series voltage regulating module 3; the outgoing line end of the bypass unit 11 is used for being connected with the outgoing line voltage bus; meanwhile, the electrical and mechanical interlockers are arranged between the bypass unit 11 and the incoming line unit 12, so as to ensure that the bypass circuit and the voltage regulating circuit are not closed at the same time, and to ensure that the self-coupling voltage regulating device is not burned due to the short circuit of the voltage regulating winding 32; and when the voltage regulator 31 fails, the bypass can be automatically switched by the series voltage regulating module 3, and the output is realized through the bypass module.
[0059] The incoming line unit 12 comprises an incoming line assembly 121, an outgoing line assembly 122 and a voltage bus 123; the input end of the incoming line assembly 121 is used for being connected with the incoming line voltage bus; the voltage regulating end of the incoming line assembly 121 is connected with the voltage regulating output end of the series voltage regulating module 3; the output end of the incoming line assembly 121 is connected with the voltage bus 123; the input end of the outgoing line assembly 122 is connected with the voltage bus 123; and the gear output end of the outgoing line assembly 122 is connected with the input end of the series voltage regulating module 3.
[0060] As shown in FIG. 1, the incoming line module 1 comprises the bypass unit 11 and the incoming line unit 12. Figure 3 The incoming line assembly 121 comprises a current transformer TA and a switch S; the input end of the current transformer TA is used for being connected with the incoming line voltage bus; the output end of the current transformer TA is connected with one end of the switch S; the other end of the switch S is connected with the voltage bus 123; meanwhile, in order to ensure the safe operation of the incoming line assembly 121, the protection device, the live display XS and the ammeter DLB are arranged; the protection device, the live display XS and the ammeter DLB are respectively arranged on the main circuit of the current transformer TA as independent branches; the protection device comprises the lightning arrester FB and the circuit breaker QS; and the switch S comprises the three-position disconnector / grounding switch.
[0061] The incoming line module 1 further comprises a voltage mutual inductor assembly 124; the main circuit of the voltage mutual inductor assembly 124 is provided with the voltmeter DVB; the input end of the voltage mutual inductor assembly 124 is connected with the voltage bus 123; the output end of the voltage mutual inductor assembly 124 is connected with the detection end of the series voltage regulating module 3; wherein the voltage mutual inductor assembly 124 comprises a voltage mutual inductor TF and a fuse R; the input end of the fuse R is connected with the voltage bus 123; the output end of the fuse R is connected with the input end of the current transformer TA; and the output end of the voltage mutual inductor TF is connected with the detection end of the series voltage regulating module 3. The voltage mutual inductor assembly 124 and the incoming line assembly 12 are connected with the voltage regulator 31, so as to realize the secondary voltage, current or control circuit and other purposes.
[0062] Please refer to Figure 4 , the outgoing line module 2 includes outgoing line unit 21, reserved access unit 22 and voltage bus; the input end of outgoing line unit 21 is connected with the gear output end of series voltage regulating module 3; the output end of outgoing line unit 21 is connected with voltage bus and is used for connecting with outgoing line voltage bus; the voltage regulating end of outgoing line unit 21 is connected with the voltage regulating output end of series voltage regulating module 3; the input end of reserved access unit 22 is connected with voltage bus; the output end of reserved access unit 22 is used as a reserved output interface. Wherein, the reserved access unit 22 includes at least two outgoing line components 122; the input end of all outgoing line components 122 is connected with voltage bus; the output end of each outgoing line component 122 is used as a reserved output interface. That is, outgoing line module 2 realizes multi-terminal current sampling of incoming and outgoing, station power, green electricity interface, etc., and can realize differential protection by comparing the current difference, frequency and transformation ratio between the protection winding 32 of the current transformer TA between the incoming and outgoing lines, solving the problem that there is no suitable protection device for turn-to-turn short circuit of voltage regulator 31, effectively avoiding the influence of through current on voltage regulator 31.
[0063] Wherein, the incoming line component 121 and the outgoing line component 122 have similar structures, the outgoing line module 2 and the incoming line module 1 have similar structures, and are divided into incoming line module 1 or outgoing line module 2 according to their functions on the main circuit, and are divided into incoming line component 121 or outgoing line component 122. When detecting the circuit parameters, the secondary current vector sum of the current transformer TA of incoming line component 121 and the current transformer TA of outgoing line component 122 should be zero, so as to judge whether there is turn-to-turn short circuit, pie-to-pie short circuit, winding 32 or other conductor grounding and other abnormalities in the voltage regulator 31.
[0064] At the same time, the above-mentioned device in the embodiment adopts container modularization, as shown in Figure 1 Different modules are arranged in the corresponding ring network cabinet, and the modules adopt wall bushing or container bottom cable butt joint, and the secondary and power plug butt joint can be put into production. The plug-in type installation and debugging is adopted: after the foundation pouring is completed or the pre-installed concrete block is in place, direct stacking is carried out.
[0065] The above-mentioned is only the embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation made by using the contents of the utility model specification and drawings, or direct or indirect application in related technical field, is also included in the patent protection range of the utility model.
Claims
1. A long line mid-tail modular bypass on-load tap changer characterized by, The input line module, the output line module and the series voltage regulating module are included; The series voltage regulating module includes a voltage regulator and a winding; the output end of the voltage regulator is connected with the middle position of the winding; the two sides of the middle position of the winding are respectively used as the input end and the output end of the series voltage regulating module; The input end of the input line module is used for connecting with the input line voltage bus; The gear output end of the input line module is connected with the input end of the series voltage regulating module; the output end of the series voltage regulating module is connected with the gear input end of the output line module; The detection end of the series voltage regulating module is connected with the voltage detection end of the input line module and the voltage detection end of the output line module respectively; The output end of the output line module is used for connecting with the output line voltage bus.
2. A long line middle and rear section modular on-load tap changer according to claim 1, characterized in that, The input line module includes a bypass unit and an input line unit; The input end of the bypass unit and the input end of the input line unit are respectively used for connecting with the input line voltage bus; The gear output end of the input line unit is connected with the input end of the series voltage regulating module; The voltage regulating end of the input line unit is connected with the voltage regulating output end of the series voltage regulating module; The output end of the bypass unit is used for connecting with the output line voltage bus.
3. The long line middle and back section modular on-load tap changer bypass of claim 2, wherein, An electrical and mechanical interlock is arranged between the bypass unit and the input line unit.
4. The long line middle and back section modular on-load tap changer of claim 2, wherein, The input line unit includes an input line assembly, an output line assembly and a voltage bus; The input end of the input line assembly is used for connecting with the input line voltage bus; The voltage regulating end of the input line assembly is connected with the voltage regulating output end of the series voltage regulating module; The output end of the input line assembly is connected with the voltage bus; The input end of the output line assembly is connected with the voltage bus; The gear output end of the output line assembly is connected with the input end of the series voltage regulating module.
5. The long line middle and back section modular on-load tap changer according to claim 4, wherein, The input line assembly includes a current transformer and a switch; The input end of the current transformer is used for connecting with the input line voltage bus; The output end of the current transformer is connected with one end of the switch; The other end of the switch is connected with the voltage bus gating.
6. The long line middle and back section modular on-load tap changer bypass of claim 5, wherein, The input line assembly further includes a protection device, a live display and an ammeter; The protection device, the live display and the ammeter are respectively arranged on the main circuit of the current transformer as independent branches.
7. The long line middle and back section modular on-load tap changer bypass of claim 5, wherein, The input line module further includes a voltage mutual inductor assembly; The main circuit of the voltage mutual inductor assembly is provided with a voltmeter; The input end of the voltage mutual inductor assembly is connected with the voltage bus; The output end of the voltage mutual inductor assembly is connected with the detection end of the series voltage regulating module.
8. The long line middle and back section modular on-load tap changer bypass device of claim 7, wherein, The voltage mutual inductor assembly includes a voltage mutual inductor and a fuse; The input end of the fuse is connected with the voltage bus; The output end of the fuse is connected with the input end of the current transformer; The output end of the voltage mutual inductor is connected with the detection end of the series voltage regulating module.
9. A long line middle and back section modular on-load tap changer bypass device according to claim 1, characterized in that, The output line module includes an output line unit, a reserved access unit and a voltage bus; The input end of the output line unit is connected with the gear output end of the series voltage regulating module; The output end of the output line unit is connected with the voltage bus and used for connecting with the output line voltage bus; The voltage regulating end of the output line unit is connected with the voltage regulating output end of the series voltage regulating module; An input end of the reserved access unit is connected with the voltage bus; An output end of the reserved access unit serves as a reserved output interface.
10. A long line middle and back section modular on-load tap changer bypass device according to claim 9, characterized in that, The reserved access unit comprises at least two outgoing line assemblies; An input end of each of the outgoing line assemblies is connected with the voltage bus; An output end of each of the outgoing line assemblies serves as a reserved output interface.