CN117578486A - Multi-feeder voltage regulating circuit and method for power distribution network - Google Patents
Multi-feeder voltage regulating circuit and method for power distribution network Download PDFInfo
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- CN117578486A CN117578486A CN202311628868.1A CN202311628868A CN117578486A CN 117578486 A CN117578486 A CN 117578486A CN 202311628868 A CN202311628868 A CN 202311628868A CN 117578486 A CN117578486 A CN 117578486A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/002—Flicker reduction, e.g. compensation of flicker introduced by non-linear load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/008—Circuit arrangements for ac mains or ac distribution networks involving trading of energy or energy transmission rights
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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Abstract
The invention relates to the power system technology, and discloses a multi-feeder voltage regulating circuit of a power distribution network, which comprises the following components: the multi-port power converter has a bidirectional flow function of tide among ports; the primary side of the first parallel transformer is connected with a first alternating current bus, and the secondary side of the first parallel transformer is connected with a first end of a first alternating current input port; the second end of the first alternating current input port is connected with the first end of the direct current port, and the second end of the direct current port is connected with the first end of the alternating current output port; the head end of each feeder is connected with a first alternating current bus, and the tail end of each feeder extends to a lower power grid or load; the primary side of a series transformer is connected in series with a feeder, and the secondary side of each series transformer is connected with the second end of an alternating current output port; the alternating current output port injects voltage compensation quantity through the series transformer, so that the feeder line provides a stable power supply environment for a lower power grid or a load, or the flow of power flow between the feeder line and the feeder line is realized.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a power distribution network multi-feeder voltage regulating circuit and method.
Background
The problems of frequent voltage fluctuation, voltage oscillation, voltage harmonic amplification and the like are brought to the power distribution network by large-scale distributed new energy access, emerging loads and other resources. The main reasons of the method are that the bidirectional fluctuation of the power flow is greatly caused and the impedance of the power distribution network is dynamically changed after the power distribution network is activated, so that the operation reliability of the power distribution network is reduced, and the friendly interaction of each link of source-network-load-storage is affected.
In order to cope with the above problems, there is a need to improve the flexible regulation capability of the power distribution network, and one of the core technologies is how to implement automatic voltage control of the power distribution network. However, in the prior art, only the busbar voltage of the transformer substation is subjected to centralized adjustment, the voltage of each line fed out from the busbar cannot be independently adjusted, and particularly, when the characteristic difference of each feeder line is considered, if the feeder line enriched with new energy presents the power generation characteristic, the voltage is easily increased, the power flow flows randomly and the like; the load-enriched feeder line presents electrical characteristics, which easily lead to voltage reduction, even power quality degradation, and the like. In addition, the prior art cannot take the time sequence operation characteristics of each feeder line into consideration for classification and accurate adjustment, and is difficult to meet the development requirement of an active power distribution network, and even prevents the construction of a novel power system.
Therefore, new voltage regulation means should be explored as soon as possible, the extension connotation of the voltage regulation technology of the power distribution network is enriched, and besides voltage regulation, some new regulation demands, such as fundamental wave/harmonic wave impedance, tide, demand response regulation, and even the demands of impedance scanning of an active power distribution network, should be met.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the power distribution network in the prior art only carries out centralized adjustment on the bus voltage of the transformer substation, and the voltages of all lines fed out from the bus cannot be independently adjusted, so that the power distribution network multi-feeder voltage adjusting circuit and method are provided.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in a first aspect, the present invention provides a multi-feeder voltage regulation circuit for a power distribution network, comprising: the power supply system comprises a first alternating current bus, a multi-port power converter, a first parallel transformer, a plurality of series transformers and a plurality of feeder lines, wherein the multi-port power converter comprises a first alternating current input port, a direct current port and a plurality of alternating current output ports, and a power flow bidirectional flow function is provided between the ports; the primary side of the first parallel transformer is connected with a first alternating current bus, and the secondary side of the first parallel transformer is connected with a first end of a first alternating current input port; the second end of the first alternating current input port is connected with the first end of the direct current port, and the second end of the direct current port is connected with the first end of the alternating current output port; the head end of each feeder is connected with a first alternating current bus, and the tail end of each feeder extends to a lower power grid or load; the primary side of a series transformer is connected in series with a feeder, and the secondary side of each series transformer is connected with the second end of an alternating current output port; the alternating current output port injects voltage compensation quantity through the series transformer, so that the feeder line provides a stable power supply environment for a lower power grid or a load, or the flow of power flow between the feeder line and the feeder line is realized.
According to the invention, each series transformer can be independently regulated through the multi-port power converter, and the regulation of one feeder line can not be applied to other feeder lines, so that the decoupling regulation of each feeder line or alternating current bus is realized.
In an alternative embodiment, the power distribution network multi-feeder voltage regulation circuit further comprises: the second alternating current bus and the circuit breaker are connected in series with the first alternating current bus through the circuit breaker; the second alternating current bus is connected with a lower-level power grid or a load through a plurality of feeder lines.
In an alternative embodiment, the power distribution network multi-feeder voltage regulation circuit further comprises: the primary side of the first transformer is connected with one of the first alternating current bus and the second alternating current bus, and the secondary side of the first transformer is connected with one of the alternating current output ports; the alternating current output port is used for realizing the adjustment of the power flow between the first alternating current bus and the second alternating current bus by applying adjustable voltage to the secondary side of the first transformer, so that the power supply of the first alternating current bus and the second alternating current bus is balanced or mutually balanced.
In an alternative embodiment, the power distribution network multi-feeder voltage regulation circuit further comprises: the primary side of the second parallel transformer is connected with a second alternating current bus, and the secondary side of the second parallel transformer is connected with the first end of the second alternating current input port; the second end of the second alternating current input port is connected with the first end of the direct current port; a primary side of a series transformer is connected in series in a feeder line connected with the second alternating current bus, and a secondary side of the series transformer is connected with a second end of an alternating current output port; the first alternating current bus and the second alternating current bus perform power interaction through the first alternating current port, the second alternating current port, the direct current port and the alternating current output port.
In an alternative embodiment, the second end of the dc port is also connected to a dc load, a power source and an energy storage.
In an alternative embodiment, the power distribution network multi-feeder voltage regulation circuit further comprises: and the second transformer, wherein the first alternating current bus and the second alternating current bus are connected into alternating current through a second transformer.
In a second aspect, the present invention provides a method of a multi-feeder voltage regulation circuit for a power distribution network, the method comprising, based on the circuit of the first aspect and any optional embodiment thereof: the power and electric energy quality regulation function required by the multi-port power converter is provided by controlling the first alternating current input port and the second alternating current input port to regulate current on a wide frequency band; and respectively carrying out voltage and impedance compensation according to the operation working conditions of each feeder line or the first alternating current bus and the second alternating current bus, and realizing the dynamic control of the target regulation requirement.
According to the invention, according to different feeder operation characteristics output by the transformer substation, independent dynamic voltage, impedance and power flow adjustment can be respectively carried out on each feeder, the adjustment between the decoupling alternating current bus and the multiple feeders is not influenced by the voltage adjustment of the traditional AVC, and a stable voltage reference environment is provided for the active power distribution network.
In an alternative embodiment, a process for implementing dynamic control of a target regulatory requirement includes: the control alternating current output port is independently regulated through each series transformer, so that compensation quantity is injected into the feeder line, and a stable power supply environment is provided for a lower-level power grid or load, or flow of power flow between the feeder line and the feeder line is realized.
In an alternative embodiment, a process for implementing dynamic control of a target regulatory requirement includes: the control alternating current output port realizes the adjustment of the power flow between the first alternating current bus and the second alternating current bus by applying adjustable voltage to the secondary side of the first transformer, so that the power supply powers of the two buses are balanced or mutually balanced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of a specific example of a multi-feeder adjusting circuit of a power distribution network provided in the present embodiment;
fig. 2 is a block diagram of another specific example of the multi-feeder adjusting circuit of the power distribution network provided in the present embodiment;
fig. 3 is a block diagram of another specific example of the multi-feeder adjusting circuit of the power distribution network provided in the present embodiment;
fig. 4 is a block diagram of another specific example of the multi-feeder adjusting circuit of the power distribution network provided in the present embodiment;
fig. 5 is a block diagram of another specific example of the multi-feeder adjusting circuit of the power distribution network provided in the present embodiment.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The invention provides a multi-feeder voltage regulating circuit of a power distribution network, as shown in figure 1, comprising: first ac bus, multiport power converter, first parallel transformer (i.e. T 01 ) Multiple series transformers (i.e. T s1 、T s2 、…、T sn ) A plurality of feeder lines. The multi-port power converter comprises a first alternating current input port (namely AC), a direct current port (namely DC) and a plurality of alternating current output ports (namely AC-1, AC-2 and … AC-n), wherein the ports have a power flow bidirectional flow function, namely, the power between any ports can realize bidirectional flow through a certain method, and the electrical parameters presented by the ports can be flexibly adjusted through a preset method.
Specifically, the multi-port power converter has an ac input port, a dc port, and an ac output port, wherein the ac input port to the dc port can be constructed using a converter having an ac-dc conversion function, the dc port to the ac output port can be constructed using a converter having a dc-ac conversion function, the ac input port to the ac output port can also be constructed using a converter having an ac-ac conversion function, and a bidirectional flow function of power flow is provided between any of the ports.
Specifically, the multiport power converter can realize power quality compensation, such as reactive compensation, harmonic compensation and the like, so that the power distribution network provides stable voltage for a load and can be automatically adjusted. The multi-port power converter is provided with power required by the multi-port power converter or with power quality regulation functions such as bus voltage support, parallel impedance regulation, reactive power/harmonic wave and the like by controlling the alternating current input port of the multi-port power converter to carry out current regulation on a wide frequency band.
Further, as shown in fig. 1, the primary side of the first parallel transformer is connected to a first ac bus, and the secondary side of the first parallel transformer is connected to a first end of the first ac input port; the second end of the first alternating current input port is connected with the first end of the direct current port, and the second end of the direct current port is connected with the first end of the alternating current output port; the head end of each feeder is connected with a first alternating current bus, and the tail end of each feeder extends to a lower power grid or load; the primary side of a series transformer is connected in series with a feeder, and the secondary side of each series transformer is connected with the second end of an alternating current output port.
Specifically, as shown in fig. 1, the first parallel transformers are installed in parallel on an ac bus or a single or multiple feeder lines with relatively stable voltage, that is, the primary side of each parallel transformer is connected to the ac bus or the feeder line, and the secondary side is correspondingly connected to an ac input port of the multi-port power converter.
Specifically, as shown in fig. 1, the series transformers are installed in series between each feeder line or two ac buses to be regulated, i.e., the primary side of each series transformer is connected in series between the feeder line or two buses, and the secondary side is correspondingly connected to an ac output port of the multi-port power converter.
Further, the alternating current output port injects voltage compensation quantity through the series transformer, so that the feeder line provides a stable power supply environment for a lower-level power grid or load, or the flow of power flow between the feeder line and the feeder line is realized.
Specifically, the embodiment controls the ac output port of the multiport power converter to regulate voltage, impedance and the like on a wide frequency band, and couples the multiport power converter to the feeder line through each series transformer, and respectively compensates the voltage and the impedance according to the operation working conditions of each feeder line or ac bus, so as to realize the dynamic control of multi-target regulation requirements of voltage, impedance, tide and the like.
In some alternative embodiments, as shown in fig. 2, the power distribution network multi-feeder voltage regulation circuit further includes: the second alternating current bus and the circuit breaker are connected in series with the first alternating current bus through the circuit breaker; the second alternating current bus is connected with a lower-level power grid or a load through a plurality of feeder lines.
In some alternative embodiments, as shown in fig. 3, the power distribution network multi-feeder voltage regulation circuit further includes: a first transformer (i.e. Tsn), wherein two ends of a primary side of the first transformer are respectively connected with a first alternating current bus and a second alternating current bus, and a secondary side of the first transformer is connected with any one alternating current output port; the alternating current output port is used for realizing the adjustment of the power flow between the first alternating current bus and the second alternating current bus by applying adjustable voltage to the secondary side of the first transformer, so that the power supply of the first alternating current bus and the second alternating current bus is balanced or mutually balanced.
Specifically, a first transformer is connected in series at a tie switch of a first alternating current bus and a second alternating current bus, two ends of a primary side of the transformer are respectively connected into two buses correspondingly, and a secondary side of the transformer is connected into an alternating current output port AC-n of the multi-port power converter correspondingly. By applying an adjustable voltage, such as a virtual voltage equivalent to the voltage at two ends of a reactance (inductive reactance, capacitive reactance and impedance), to the secondary side of the transformer, the power flow of two sections of buses of the transformer substation can be adjusted, so that the power supply of the two sections of buses is balanced or mutually balanced, and the utilization rate of the transformer substation equipment is improved.
In some alternative embodiments, as shown in the figures4, the multi-feeder voltage regulating circuit of the power distribution network further comprises: a second AC input port (AC 2), a second parallel transformer (T) 02 ) The primary side of the second parallel transformer is connected with a second alternating current bus, and the secondary side of the second parallel transformer is connected with the first end of the second alternating current input port; the second end of the second alternating current input port is connected with the first end of the direct current port; a primary side of a series transformer is connected in series in a feeder line connected with the second alternating current bus, and a secondary side of the series transformer is connected with a second end of an alternating current output port; the first alternating current bus and the second alternating current bus perform power interaction through the first alternating current port, the second alternating current port, the direct current port and the alternating current output port.
Specifically, the embodiment uses the multiport power converter to output variable voltage, impedance and the like, and injects the variable voltage, the impedance and the like into each feeder line through the series transformer, namely, an equivalent voltage is overlapped on the basis of the bus voltage of the transformer substation, so that the feeder line provides a stable power supply environment for a lower-level power grid or load, and the flow and mutual balance of the power flow between the feeder line and the feeder line can be realized. The two-section bus can perform power interaction through the first alternating current input port and the second alternating current input port, so that the power flow of the two-section bus of the transformer substation can be regulated, the power supply powers of the two-section bus are balanced or mutually balanced, the utilization rate of transformer substation equipment is improved, and the power quality of the bus, such as reactive power, harmonic waves and the like, can be regulated through the alternating current input port. The multi-port power converter can perform energy bidirectional interaction among all ports. The multi-port power converter is used for outputting variable voltage, impedance and the like, and the series transformer is used for injecting adjustable voltage, impedance and the like into each feeder line, namely, an equivalent voltage is superposed on the basis of the bus voltage of the transformer substation, so that the feeder lines provide stable power supply environment for a lower-level power grid or load, and the flow and mutual aid of the power flow between the feeder lines can be realized.
In some alternative embodiments, as shown in fig. 5, the second end of the dc port is further connected to a dc load, a power supply and an energy storage, so as to flexibly regulate and control power generation of new energy on the feeder line, realize reasonable distribution and utilization of electric energy, and also be used for constructing an ac input port voltage source of the multi-port power converter, thereby supporting voltage, inertia and the like of the power grid.
In some alternative embodiments, the power distribution network multi-feeder voltage regulation circuit further comprises: and the second transformer, wherein the first alternating current bus and the second alternating current bus are connected into alternating current through a second transformer.
The embodiment provides a method for adjusting a voltage of multiple feeder lines of a power distribution network, which is based on the above embodiment and any circuit of the optional implementation manner, and includes:
the power and electric energy quality regulation function required by the multi-port power converter is provided by controlling the first alternating current input port and the second alternating current input port to regulate current on a wide frequency band;
and respectively carrying out voltage and impedance compensation according to the operation working conditions of each feeder line or the first alternating current bus and the second alternating current bus, and realizing the dynamic control of the target regulation requirement.
In some alternative embodiments, a process for implementing dynamic control of a target regulatory requirement includes:
the control alternating current output port is independently regulated through each series transformer, so that compensation quantity is injected into the feeder line, and a stable power supply environment is provided for a lower-level power grid or load, or flow of power flow between the feeder line and the feeder line is realized.
In some alternative embodiments, a process for implementing dynamic control of a target regulatory requirement includes:
the control alternating current output port realizes the adjustment of the power flow between the first alternating current bus and the second alternating current bus by applying adjustable voltage to the secondary side of the first transformer, so that the power supply powers of the two buses are balanced or mutually balanced.
Specifically, according to the embodiment, according to different feeder operation characteristics output by a transformer substation, independent dynamic voltage, impedance and power flow adjustment can be respectively carried out on each feeder, adjustment between an alternating current bus and multiple feeders is decoupled, the voltage adjustment is not affected by the voltage adjustment of the traditional AVC, and a stable voltage reference environment is provided for an active power distribution network; the suppression of background harmonic voltage can be realized, the electric energy quality problem caused by load or new energy is blocked from being introduced into an upper power grid, damping adjustment can be performed, and the broadband voltage problem caused by the occurrence of an oscillation event is avoided; the temporary rising and dropping voltage is restrained, so that the problem that the dispatching is difficult due to the fact that a distributed power supply without fault ride through capability is off-line is avoided; the flexible connection of the sectional buses can be realized, the bus power flow is balanced, the power flow transfer between feeder lines can also be realized, the dynamic capacity increase of the lines is realized, and the reliable operation capability and the flexible allocation capability of the power distribution network are further improved; the impedance of the active power distribution network can be actively scanned through the wide-frequency adjustment capability of the multi-port power converter, so that reverse modeling of the active power distribution network is realized, a non-stationary operating point is actively found and early warning is carried out in advance; the disturbance to the load power can be realized by actively adjusting the line voltage in a certain range through the embodiment, and the aim of demand response adjustment is fulfilled. Therefore, the embodiment has higher engineering application value and better social and economic benefits.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (9)
1. A power distribution network multi-feeder voltage regulation circuit, comprising: a first alternating current bus, a multi-port power converter, a first parallel transformer, a plurality of series transformers, a plurality of feeders, wherein,
the multi-port power converter comprises a first alternating current input port, a direct current port and a plurality of alternating current output ports, and a power flow bidirectional flow function is provided between the ports;
the primary side of the first parallel transformer is connected with the first alternating current bus, and the secondary side of the first parallel transformer is connected with the first end of the first alternating current input port;
the second end of the first alternating current input port is connected with the first end of the direct current port, and the second end of the direct current port is connected with the first end of the alternating current output port;
the head end of each feeder line is connected to the first alternating current bus, and the tail end of each feeder line extends to a lower-level power grid or load;
the primary side of one series transformer is connected in series into a feeder line, and the secondary side of each series transformer is connected with the second end of one alternating current output port;
and the alternating current output port injects voltage compensation quantity through the series transformer, so that the feeder line provides a stable power supply environment for a lower-level power grid or load, or the flow of power flow between the feeder line and the feeder line is realized.
2. The power distribution network multi-feeder voltage regulation circuit of claim 1, further comprising: a second alternating current bus and a circuit breaker, wherein,
the second alternating current bus is connected with the first alternating current bus in series through the circuit breaker;
the second alternating current bus is connected with a lower-level power grid or a load through a plurality of feeder lines.
3. The power distribution network multi-feeder voltage regulation circuit of claim 2, further comprising: a first transformer, wherein,
two ends of a primary side of the first transformer are respectively connected with the first alternating current bus and the second alternating current bus, and a secondary side of the first transformer is connected with any one of the alternating current output ports;
the alternating current output port is used for realizing the adjustment of the power flow between the first alternating current bus and the second alternating current bus by applying an adjustable voltage to the secondary side of the first transformer, so that the power supply power of the first alternating current bus and the power supply power of the second alternating current bus are balanced or mutually balanced.
4. The power distribution network multi-feeder voltage regulation circuit of claim 2, further comprising: a second ac input port, a second shunt transformer, wherein,
the primary side of the second parallel transformer is connected with the second alternating current bus, and the secondary side of the second parallel transformer is connected with the first end of the second alternating current input port;
the second end of the second alternating current input port is connected with the first end of the direct current port;
a primary side of the series transformer is connected in series in a feeder line connected with the second alternating current bus, and a secondary side of the series transformer is connected with a second end of the alternating current output port;
and the first alternating current bus and the second alternating current bus perform power interaction through the first alternating current port, the second alternating current port, the direct current port and the alternating current output port.
5. The power distribution network multi-feeder voltage regulation circuit of any one of claims 1-4, wherein the second end of the dc port is further connected to a dc load, a power source, and an energy storage.
6. The power distribution network multi-feeder voltage regulation circuit of any of claims 2-4, further comprising: a second transformer, wherein,
the first alternating current bus and the second alternating current bus are connected into alternating current through a second transformer.
7. A method of a multi-feeder voltage regulation circuit for a power distribution network, based on the circuit of any one of claims 1-6, the method comprising:
the power and electric energy quality regulation function required by the multi-port power converter is provided by controlling the first alternating current input port and the second alternating current input port to regulate current on a wide frequency band;
and respectively carrying out voltage and impedance compensation according to the operation working conditions of each feeder line or the first alternating current bus and the second alternating current bus, and realizing the dynamic control of the target regulation requirement.
8. The method of power distribution network multi-feeder voltage regulation circuit of claim 7, wherein the process of implementing dynamic control of target regulation demand comprises:
and controlling an alternating current output port to be independently regulated through each series transformer, so that compensation quantity is injected into the feeder line to provide a stable power supply environment for a lower-level power grid or load or realize flow of power flow between the feeder line and the feeder line.
9. The method of power distribution network multi-feeder voltage regulation circuit of claim 7, wherein the process of implementing dynamic control of target regulation demand comprises:
and controlling the alternating current output port to realize the adjustment of the power flow between the first alternating current bus and the second alternating current bus by applying adjustable voltage to the secondary side of the first transformer, so that the power supply power of the two buses is balanced or mutually balanced.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311628868.1A CN117578486A (en) | 2023-11-30 | 2023-11-30 | Multi-feeder voltage regulating circuit and method for power distribution network |
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| CN202311628868.1A CN117578486A (en) | 2023-11-30 | 2023-11-30 | Multi-feeder voltage regulating circuit and method for power distribution network |
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