CN112039101A - Voltage quality regulator - Google Patents

Voltage quality regulator Download PDF

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Publication number
CN112039101A
CN112039101A CN202010896224.0A CN202010896224A CN112039101A CN 112039101 A CN112039101 A CN 112039101A CN 202010896224 A CN202010896224 A CN 202010896224A CN 112039101 A CN112039101 A CN 112039101A
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China
Prior art keywords
triode
port
energy storage
storage unit
arm switch
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Granted
Application number
CN202010896224.0A
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Chinese (zh)
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CN112039101B (en
Inventor
王勇
周凯
莫文雄
许中
马智远
郭倩雯
饶毅
栾乐
马捷然
罗林欢
孙奇珍
唐宗顺
杨帆
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Guangzhou Power Supply Bureau of Guangdong Power Grid Co Ltd
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Guangzhou Power Supply Bureau of Guangdong Power Grid Co Ltd
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Priority to CN202010896224.0A priority Critical patent/CN112039101B/en
Publication of CN112039101A publication Critical patent/CN112039101A/en
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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
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • 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
    • 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
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • 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

Abstract

The invention discloses a voltage quality regulator, comprising: a first inductive energy storage unit; the first capacitive energy storage unit is used for storing energy according to input alternating current and outputting direct current; a first port of the inverter bridge module is connected with a first port of the first capacitive energy storage unit, a second port of the inverter bridge module is connected with a first port of the first inductive energy storage unit, a third port of the inverter bridge module is connected with a second port of the first inductive energy storage unit, and a fourth port of the inverter bridge module is connected with a second port of the first capacitive energy storage unit; and the inverter bridge module outputs preset compensation voltage by controlling the switching time and/or switching frequency of each switching unit in the inverter bridge module so as to adjust the voltage quality of the alternating current. The regulator circuit has simple wiring, does not need to use a large-capacity bus capacitor, saves the equipment cost and reduces the volume of the equipment.

Description

Voltage quality regulator
Technical Field
The invention relates to the technical field of electric power, in particular to a voltage quality regulator.
Background
With the increase of the number of electric equipment, nonlinear loads and sensitive loads in the development of industry, the quality problem of the power grid voltage is increasingly highlighted and also increasingly paid more attention by users. Common voltage quality problems mainly include undervoltage, overvoltage and harmonic waves of voltage, and the problems affect normal use of equipment and reduce the service life of the equipment.
At present, the traditional adjusting equipment for solving the quality problems of over-low voltage, over-high voltage and the like in practical application mainly comprises a transformer, a voltage control device with a coupling transformer and a power supply type adjuster of a bus parallel connection large-capacity electrolytic capacitor. The transformer has the problems of large volume and heavy weight, and cannot realize voltage stabilization; the voltage regulating equipment with the coupling transformer has the problems that the magnetic saturation of the transformer can be caused due to the nonlinear characteristic of the equipment, the loss of the equipment is increased, and the cost is high; the bus of the voltage source type series active voltage control device is often connected with a large number of electrolytic capacitors in parallel, so that the realization of further reducing the volume of the equipment is limited to a great extent, and the cost is increased.
Disclosure of Invention
In view of the above, there is a need to provide a voltage quality regulator, which greatly reduces the circuit complexity and the device volume and reduces the device cost compared to the conventional regulating device.
In order to solve the above technical problem, the present application provides a voltage quality regulator, including:
a first inductive energy storage unit;
the first capacitive energy storage unit is used for storing energy according to input alternating current and outputting direct current;
a first port of the inverter bridge module is connected with a first port of the first capacitive energy storage unit, a second port of the inverter bridge module is connected with a first port of the first inductive energy storage unit, a third port of the inverter bridge module is connected with a second port of the first inductive energy storage unit, and a fourth port of the inverter bridge module is connected with a second port of the first capacitive energy storage unit;
and the inverter bridge module outputs preset compensation voltage by controlling the switching time and/or switching frequency of each switching unit in the inverter bridge module so as to adjust the voltage quality of the alternating current.
In the voltage quality regulator in the above embodiment, by providing the inverter bridge module connected to both the first capacitive energy storage unit and the first inductive energy storage unit, the first capacitive energy storage unit stores energy according to the input ac power and outputs dc power, and the switching time and/or switching frequency of each switching unit in the inverter bridge module is controlled so that the inverter bridge module outputs a preset compensation voltage to regulate the voltage quality of the ac power. The voltage quality regulator compensates the output voltage in real time according to the amplitude change of the alternating current so as to maintain the stability of the alternating voltage and solve the problems of undervoltage, overvoltage and harmonic wave which often occur. The voltage quality regulator consists of a plurality of switch units, is simple in circuit wiring, does not need to use a large-capacity bus capacitor, greatly saves equipment cost and reduces the volume of regulating equipment.
In one embodiment, the inverter bridge module includes:
a first upper bridge arm switch unit, a first port of which is connected with a first port of the first capacitive energy storage unit, and a second port of which is connected with a first port of the first inductive energy storage unit;
a first lower bridge arm switch unit, a first port of which is connected with a second port of the first inductive energy storage unit, and a second port of which is connected with both the first port of the first upper bridge arm switch unit and the first port of the first capacitive energy storage unit;
a second port of the second upper bridge arm switch unit is connected with the first port of the first inductive energy storage unit;
a first port of the second lower bridge arm switch unit is connected with a second port of the first inductive energy storage unit, and a second port of the second lower bridge arm switch unit is connected with a first port of the second upper bridge arm switch unit and a second port of the first capacitive energy storage unit;
a second port of the third upper bridge arm switch unit is connected with the second port of the first upper bridge arm switch unit, the second port of the second upper bridge arm switch unit and the first port of the first inductive energy storage unit;
and a first port of the third lower bridge arm switch unit is connected with a first port of the first lower bridge arm switch unit, a first port of the second lower bridge arm switch unit and a second port of the first inductive energy storage unit, and a second port of the third lower bridge arm switch unit is connected with a first port of the third upper bridge arm switch unit and a second port of the first capacitive energy storage unit.
In one embodiment, the first upper bridge arm switch unit includes a first triode, a collector of the first triode is connected with the first port of the first capacitive energy storage unit, and an emitter of the first triode is connected with the first port of the first inductive energy storage unit;
the first lower bridge arm switch unit comprises a second triode, a collector of the second triode is connected with the second port of the first inductive energy storage unit, and an emitter of the second triode is connected with the collector of the first triode and the first port of the first capacitive energy storage unit;
the second upper bridge arm switch unit comprises a third triode, and an emitting electrode of the third triode is connected with the first port of the first inductive energy storage unit;
the second lower bridge arm switch unit comprises a fourth triode, a collector of the fourth triode is connected with the second port of the first inductive energy storage unit, and an emitter of the fourth triode is connected with a collector of the third triode and the second port of the first capacitive energy storage unit;
the third upper bridge arm switch unit comprises a fifth triode, and an emitting electrode of the fifth triode is connected with an emitting electrode of the first triode, an emitting electrode of the third triode and a first port of the first inductive energy storage unit;
the third lower bridge arm switch unit comprises a sixth triode, a collector of the sixth triode is connected with a collector of the second triode, a collector of the fourth triode and the second port of the first inductive energy storage unit, and an emitter of the sixth triode is connected with a collector of the fifth triode and the second port of the first capacitive energy storage unit.
In one embodiment, the inverter bridge module further comprises:
and a first port of the second capacitive energy storage unit is connected with a first port of the second upper bridge arm switch unit and a second port of the second lower bridge arm switch unit, and a second port of the second capacitive energy storage unit is connected with a first port of the third upper bridge arm switch unit and a second port of the third lower bridge arm switch unit.
In the voltage quality regulator in the above embodiment, the first upper bridge arm switch unit, the first lower bridge arm switch unit, the second upper bridge arm switch unit, the second lower bridge arm switch unit, the third upper bridge arm switch unit and the third lower bridge arm switch unit are provided; and a second capacitive energy storage unit is arranged, wherein a first port of the second capacitive energy storage unit is connected with a first port of the second upper bridge arm switch unit and a second port of the second lower bridge arm switch unit, and a second port of the second capacitive energy storage unit is connected with a first port of the third upper bridge arm switch unit and a second port of the third lower bridge arm switch unit. According to the amplitude change of the alternating current, the on-off state of each switch unit is controlled, the direct current trend is guided, and finally the second capacitive energy storage unit outputs the preset compensation voltage to maintain the stability of the alternating current voltage.
In one embodiment, when the amplitude of the alternating current is in a positive half cycle, the first triode, the fourth triode and the fifth triode are controlled to be on and the second triode, the third triode and the sixth triode are controlled to be off in a preset first time period, so that the second capacitive energy storage unit outputs a preset first under-voltage compensation voltage;
and when the amplitude of the alternating current is in the positive half cycle, controlling the fourth triode and the fifth triode to be conducted in a preset second time period, and controlling the first triode, the second triode, the third triode and the sixth triode to be turned off so that the second capacitive energy storage unit outputs a preset second undervoltage compensation voltage.
In one embodiment, when the amplitude of the alternating current is in a negative half cycle, the second triode, the third triode and the sixth triode are controlled to be on and the first triode, the fourth triode and the fifth triode are controlled to be off in the preset first time period, so that the second capacitive energy storage unit outputs a preset third under-voltage compensation voltage;
and when the amplitude of the alternating current is in the negative half cycle, controlling the third triode and the sixth triode to be conducted and controlling the first triode, the second triode, the fourth triode and the fifth triode to be switched off in the preset second time period so that the second capacitive energy storage unit outputs a preset fourth under-voltage compensation voltage.
In one embodiment, when the amplitude of the alternating current is in a positive half cycle, the second triode and the third triode are controlled to be on during a preset first time period, and the first triode, the fourth triode, the fifth triode and the sixth triode are all turned off, so that the second capacitive energy storage unit outputs a preset first overvoltage compensation voltage;
and when the amplitude of the alternating current is in the positive half cycle, controlling the second triode, the third triode, the fourth triode and the fifth triode to be conducted in a preset second time period, and controlling the first triode and the sixth triode to be turned off so that the second capacitive energy storage unit outputs a preset second overvoltage compensation voltage.
In one embodiment, when the amplitude of the alternating current is in a negative half cycle, the first triode and the fourth triode are controlled to be on, and the second triode, the third triode, the fifth triode and the sixth triode are controlled to be off during the preset first time period, so that the second capacitive energy storage unit outputs a preset third overvoltage compensation voltage;
and when the amplitude of the alternating current is in the negative half cycle, controlling the first triode, the third triode, the fourth triode and the sixth triode to be conducted in the preset second time period, and controlling the second triode and the fifth triode to be turned off so that the second capacitive energy storage unit outputs a preset fourth overvoltage compensation voltage.
In one embodiment, the inverter bridge module further comprises:
and the first switch unit is connected with the second capacitive energy storage unit in parallel.
In one embodiment, the energy storage device further includes a second inductive energy storage unit, a first port of the second inductive energy storage unit is connected to the positive input terminal of the alternating current, and a second port of the second inductive energy storage unit is connected to the first port of the first capacitive energy storage unit.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain drawings of other embodiments based on these drawings without any creative effort.
Fig. 1 is a schematic circuit diagram of a voltage quality regulator provided in a first embodiment of the present application;
fig. 2 is a schematic circuit diagram of a voltage quality regulator provided in a second embodiment of the present application;
fig. 3 is a schematic circuit diagram of a voltage quality regulator provided in a third embodiment of the present application;
fig. 4 is a schematic circuit diagram of a voltage quality regulator provided in a fourth embodiment of the present application;
fig. 5 is an equivalent circuit diagram of a voltage quality regulator in a first operating state according to an embodiment of the present application;
fig. 6 is an equivalent circuit diagram of a voltage quality regulator in a second operating state according to an embodiment of the present application;
fig. 7 is an equivalent circuit diagram of a voltage quality regulator in a third operating state according to an embodiment of the present application;
fig. 8 is an equivalent circuit diagram of a voltage quality regulator in a fourth operating state according to an embodiment of the present application;
fig. 9 is an equivalent circuit diagram of a voltage quality regulator in a fifth operating state according to an embodiment of the present application;
fig. 10 is an equivalent circuit diagram of a voltage quality regulator in a sixth operating state according to an embodiment of the present application;
fig. 11 is an equivalent circuit diagram of a voltage quality regulator in a seventh operating state according to an embodiment of the present application;
fig. 12 is an equivalent circuit diagram of a voltage quality regulator in an eighth operating state according to an embodiment of the present application;
fig. 13 is a schematic circuit diagram of a voltage quality regulator provided in a fifth embodiment of the present application;
fig. 14 is a schematic circuit diagram of a voltage quality regulator according to a sixth embodiment of the present application.
Description of reference numerals: 10-a first inductive energy storage unit, 20-a first capacitive energy storage unit, 30-an inverter bridge module, 31-a first upper bridge arm switch unit, 32-a first lower bridge arm switch unit, 33-a second upper bridge arm switch unit, 34-a second lower bridge arm switch unit, 35-a third upper bridge arm switch unit, 36-a third lower bridge arm switch unit, 37-a second capacitive energy storage unit, 38-a first switch unit and 40-a second inductive energy storage unit.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present application.
In this application, unless otherwise expressly stated or limited, the terms "connected" and "connecting" are used broadly and encompass, for example, direct connection, indirect connection via an intermediary, communication between two elements, or interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In order to explain the technical solution of the present application, the following description will be given by way of specific examples.
In a voltage quality regulator provided in an embodiment of the present application, as shown in fig. 1, the voltage quality regulator includes: a first inductive energy storage unit 10, a first capacitive energy storage unit 20 and an inverter bridge module 30. The first capacitive energy storage unit 20 is configured to store energy according to the input alternating current and output direct current; a first port of the inverter bridge module 30 is connected to a first port of the first capacitive energy storage unit 20, a second port of the inverter bridge module 30 is connected to a first port of the first inductive energy storage unit 10, a third port of the inverter bridge module 30 is connected to a second port of the first inductive energy storage unit 10, and a fourth port of the inverter bridge module 30 is connected to a second port of the first capacitive energy storage unit 20. The inverter bridge module 30 outputs a preset compensation voltage by controlling the switching time and/or the switching frequency of each switching unit in the inverter bridge module 30, so as to adjust the voltage quality of the alternating current.
In the voltage quality regulator in the above embodiment, the inverter bridge module is arranged and connected to the first capacitive energy storage unit and the first inductive energy storage unit, the first capacitive energy storage unit stores energy according to the input ac power and outputs dc power, and the switching time and/or the switching frequency of each switching unit in the inverter bridge module are controlled so that the inverter bridge module outputs a preset compensation voltage to regulate the voltage quality of the ac power. The voltage quality regulator compensates the output voltage in real time according to the amplitude change of the alternating current so as to maintain the stability of the alternating voltage and solve the problems of undervoltage, overvoltage and harmonic wave which often occur. The voltage quality regulator consists of a plurality of switch units, is simple in circuit wiring, does not need to use a large-capacity bus capacitor, greatly saves equipment cost and reduces the volume of regulating equipment.
Further, in a voltage quality regulator provided in an embodiment of the present application, as shown in fig. 2, the inverter bridge module 30 includes: first upper arm switch unit 31, first lower arm switch unit 32, second upper arm switch unit 33, second lower arm switch unit 34, third upper arm switch unit 35, and third lower arm switch unit 36. A first port of the first upper bridge arm switch unit 31 is connected with a first port of the first capacitive energy storage unit 20, and a second port of the first upper bridge arm switch unit 31 is connected with a first port of the first inductive energy storage unit 10; a first port of the first lower bridge arm switch unit 32 is connected with a second port of the first inductive energy storage unit 10, and a second port of the first lower bridge arm switch unit 32 is connected with a first port of the first upper bridge arm switch unit 31 and a first port of the first capacitive energy storage unit 20; the second port of the second upper bridge arm switch unit 33 is connected with the first port of the first inductive energy storage unit 10; a first port of the second lower bridge arm switch unit 33 is connected with a second port of the first inductive energy storage unit 10, and a second port of the second lower bridge arm switch unit 34 is connected with a first port of the second upper bridge arm switch unit 33 and a second port of the first capacitive energy storage unit 20; the second port of the third upper bridge arm switch unit 35 is connected to the second port of the first upper bridge arm switch unit 31, the second port of the second upper bridge arm switch unit 33 and the first port of the first inductive energy storage unit 10; the first port of the third lower bridge arm switch unit 36 is connected to the first port of the first lower bridge arm switch unit 32, the first port of the second lower bridge arm switch unit 34, and the second port of the first inductive energy storage unit 10, and the second port of the third lower bridge arm switch unit 36 is connected to the first port of the third upper bridge arm switch unit 35 and the second port of the first capacitive energy storage unit 20.
Further, in the voltage quality regulator provided in an embodiment of the present application, as shown in fig. 3, the inverter bridge module 30 further includes a second capacitive energy storage unit 37, a first port of the second capacitive energy storage unit 37 is connected to a first port of the second upper bridge arm switch unit 33 and a second port of the second lower bridge arm switch unit 34, and a second port of the second capacitive energy storage unit 37 is connected to a first port of the third upper bridge arm switch unit 35 and a second port of the third lower bridge arm switch unit 36. According to the amplitude change of the alternating current, the on-off state of each switch unit is controlled, the direct current trend is guided, and finally the second capacitive energy storage unit outputs the preset compensation voltage to maintain the stability of the alternating current voltage.
Further, in a voltage quality regulator provided in an embodiment of the present application, as shown in fig. 4, the first upper bridge arm switch unit 31 includes a first transistor S1, a collector of the first transistor S1 is connected to the first port of the first capacitive energy storage unit 20, and an emitter of the first transistor S1 is connected to the first port of the first inductive energy storage unit 10; the first lower bridge arm switch unit 32 comprises a second triode S2, a collector of the second triode S2 is connected with the second port of the first inductive energy storage unit 10, and an emitter of the second triode S2 is connected with a collector of the first triode S1 and the first port of the first capacitive energy storage unit 20; the second upper bridge arm switch unit 33 comprises a third triode S3, and an emitter of the third triode S3 is connected with the first port of the first inductive energy storage unit 10; the second lower bridge arm switch unit 34 includes a fourth triode S4, a collector of the fourth triode S4 is connected to the second port of the first inductive energy storage unit 10, and an emitter of the fourth triode S4 is connected to a collector of the third triode S3 and the second port of the first capacitive energy storage unit 20; the third upper bridge arm switch unit 35 includes a fifth triode S5, an emitter of the fifth triode S5 is connected to an emitter of the first triode S1, an emitter of the third triode S3, and the first port of the first inductive energy storage unit 10; the third lower bridge arm switch unit 36 includes a sixth triode S6, a collector of the sixth triode S6 is connected to a collector of the second triode S2, a collector of the fourth triode S4, and the second port of the first inductive energy storage unit 10, and an emitter of the sixth triode S6 is connected to a collector of the fifth triode S5 and the second port of the first capacitive energy storage unit 20. In one embodiment of the present application, the first inductive energy storage unit 10 may be an energy storage inductor L1. The first capacitive energy storage unit 20 may be a capacitor C1, and the second capacitive energy storage unit 37 may be a capacitor C2, which is used for storing energy and outputting ac energy to dc power, where the types of the capacitors are not limited herein.
In one embodiment of the present application, the operation of the voltage quality regulator mainly includes eight different operation states based on the amplitude change of the ac power during one complete cycle T of the ac power, as shown in fig. 5 to 12. The following description will be made in detail with respect to different operating states, in conjunction with the current trend of the circuit and the switching states of the transistors. The preset first period of time mentioned below may be (0 to DTs), the preset second period of time may be (DTs to Ts), and the sum of the preset first period of time and the preset second period of time may be half of one full cycle of the alternating current. Where D is the Duty Ratio (Duty Ratio).
Specifically, as shown in fig. 5, when the voltage quality regulator is in the first operating state, the voltage phase at both ends of the capacitor C2 is the same as the phase of the alternating current, and the amplitude of the alternating current is in the positive half cycle, the first transistor S1, the fourth transistor S4, and the fifth transistor S5 are controlled to be turned on, and the second transistor S2, the third transistor S3, and the sixth transistor S6 are controlled to be turned off in a preset first time period. The dc power output from the capacitor C1 flows through the first transistor S1, passes through the inductor L1, the inductor L1 stores energy, and flows out through the fourth transistor S4, so that the capacitor C2 outputs a preset first under-voltage compensation voltage.
Specifically, as shown in fig. 6, when the voltage quality regulator is in the second operating state, the voltage phase at both ends of the capacitor C2 is the same as the phase of the alternating current, and when the amplitude of the alternating current is in the positive half cycle, the fourth transistor S4 and the fifth transistor S5 are both controlled to be on, and the first transistor S1, the second transistor S2, the third transistor S3, and the sixth transistor S6 are all controlled to be off in the preset second time period. The direct current output by the capacitor C1 flows through the fifth switching tube and enters the fourth triode S4 through the inductor L1, and the energy stored in the inductor L1 is released to the capacitor C2, so that the capacitor C2 outputs a preset second under-voltage compensation voltage.
Specifically, as shown in fig. 7, when the voltage quality regulator is in the third operating state, the voltage phase at both ends of the capacitor C2 is the same as the phase of the alternating current, and when the amplitude of the alternating current is in the negative half cycle, the second transistor S2, the third transistor S3, and the sixth transistor S6 are controlled to be turned on, and the first transistor S1, the fourth transistor S4, and the fifth transistor S5 are controlled to be turned off in a preset first time period. The dc power output from the capacitor C1 flows through the third transistor S3, passes through the inductor L1, the inductor L1 stores energy, and flows out through the second transistor S2, so that the capacitor C2 outputs a predetermined third under-voltage compensation voltage.
Specifically, as shown in fig. 8, when the voltage quality regulator is in the fourth operating state, the voltage phase across the capacitor C2 is the same as the phase of the alternating current, and when the amplitude of the alternating current is in the negative half cycle, the third transistor S3 and the sixth transistor S6 are controlled to be turned on, and the first transistor S1, the second transistor S2, the fourth transistor S4, and the fifth transistor S5 are controlled to be turned off in the preset second time period. The direct current output by the capacitor C1 flows through the third triode S3 and enters the sixth switching tube S6 through the inductor L1, and the energy stored in the inductor L1 is released to the capacitor C2, so that the capacitor C2 outputs a preset fourth under-voltage compensation voltage.
Specifically, as shown in fig. 9, when the voltage quality regulator is in the fifth operating state, the phase of the voltage across the capacitor C2 is opposite to the phase of the alternating current, and when the amplitude of the alternating current is in the positive half cycle, the second transistor S2 and the third transistor S3 are both controlled to be on, and the first transistor S1, the fourth transistor S4, the fifth transistor S5, and the sixth transistor S6 are all controlled to be off during the preset first time period. The dc power output from the capacitor C1 flows through the third transistor S3, and passes through the inductor L1, the inductor L1 stores energy, and the energy flows out through the second transistor S2, so that the capacitor C2 outputs a predetermined first overvoltage compensation voltage.
Specifically, as shown in fig. 10, when the voltage quality regulator is in the sixth operating state, the phase of the voltage across the capacitor C2 is opposite to the phase of the alternating current, and when the amplitude of the alternating current is in the positive half cycle, the second transistor S2, the third transistor S3, the fourth transistor S4, and the fifth transistor S5 are all controlled to be on, and the first transistor S1 and the sixth transistor S6 are all controlled to be off during the preset second time period. The direct current output by the capacitor C1 flows through the fifth transistor S5 and enters the fourth transistor S4 through the inductor L1, and the energy stored in the inductor L1 is released to the capacitor C2, so that the capacitor C2 outputs a preset second overvoltage compensation voltage.
Specifically, as shown in fig. 11, when the voltage quality regulator is in the seventh operating state, the phase of the voltage across the capacitor C2 is opposite to the phase of the alternating current, and when the amplitude of the alternating current is in the negative half cycle, the first transistor S1 and the fourth transistor S4 are both controlled to be on, and the second transistor S2, the third transistor S3, the fifth transistor S5, and the sixth transistor S6 are all controlled to be off in the preset first time period. The dc power output from the capacitor C1 flows through the first transistor S1, and passes through the inductor L1, the inductor L1 stores energy, and the energy flows out through the fourth transistor S4, so that the capacitor C2 outputs a predetermined third overvoltage compensation voltage.
Specifically, as shown in fig. 12, when the voltage quality regulator is in the eighth operating state, the phase of the voltage across the capacitor C2 is opposite to the phase of the alternating current, and when the amplitude of the alternating current is in the negative half cycle, the first transistor S1, the third transistor S3, the fourth transistor S4, and the sixth transistor S6 are all controlled to be on, and the second transistor S2 and the fifth transistor S5 are all controlled to be off in the preset second time period. The direct current output by the capacitor C1 flows through the third transistor S3 and enters the sixth transistor S6 through the inductor L1, and the energy stored in the inductor L1 is released to the capacitor C2, so that the capacitor C2 outputs a preset fourth overvoltage compensation voltage.
In a voltage quality regulator provided in an embodiment of the present application, as shown in fig. 13, the inverter bridge module further includes a first switching unit 38. The first switching unit 38 is connected in parallel 37 with the second capacitive energy storage unit.
In one embodiment, with continued reference to fig. 13, the voltage quality regulator further comprises a second inductive energy storage unit 40. The first port of the second inductive energy storage unit 40 is connected to the positive input end of the alternating current, and the second port of the second inductive energy storage unit 40 is connected to the first port of the first capacitive energy storage unit.
In an embodiment of the present application, as shown in fig. 14, the first switching unit 38 may be a switch K1, and the second inductive energy storage unit 40 may be an inductor L2. One end of the load R1 is connected to the inductor L2, and the other end of the load R1 is connected to the capacitor C2.
It should be noted that the above-mentioned embodiments are only for illustrative purposes and are not meant to limit the present invention.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A voltage quality regulator, comprising:
a first inductive energy storage unit;
the first capacitive energy storage unit is used for storing energy according to input alternating current and outputting direct current;
a first port of the inverter bridge module is connected with a first port of the first capacitive energy storage unit, a second port of the inverter bridge module is connected with a first port of the first inductive energy storage unit, a third port of the inverter bridge module is connected with a second port of the first inductive energy storage unit, and a fourth port of the inverter bridge module is connected with a second port of the first capacitive energy storage unit;
and the inverter bridge module outputs preset compensation voltage by controlling the switching time and/or switching frequency of each switching unit in the inverter bridge module so as to adjust the voltage quality of the alternating current.
2. The voltage quality regulator of claim 1, wherein the inverter bridge module comprises:
a first upper bridge arm switch unit, a first port of which is connected with a first port of the first capacitive energy storage unit, and a second port of which is connected with a first port of the first inductive energy storage unit;
a first lower bridge arm switch unit, a first port of which is connected with a second port of the first inductive energy storage unit, and a second port of which is connected with both the first port of the first upper bridge arm switch unit and the first port of the first capacitive energy storage unit;
a second port of the second upper bridge arm switch unit is connected with the first port of the first inductive energy storage unit;
a first port of the second lower bridge arm switch unit is connected with a second port of the first inductive energy storage unit, and a second port of the second lower bridge arm switch unit is connected with a first port of the second upper bridge arm switch unit and a second port of the first capacitive energy storage unit;
a second port of the third upper bridge arm switch unit is connected with the second port of the first upper bridge arm switch unit, the second port of the second upper bridge arm switch unit and the first port of the first inductive energy storage unit;
and a first port of the third lower bridge arm switch unit is connected with a first port of the first lower bridge arm switch unit, a first port of the second lower bridge arm switch unit and a second port of the first inductive energy storage unit, and a second port of the third lower bridge arm switch unit is connected with a first port of the third upper bridge arm switch unit and a second port of the first capacitive energy storage unit.
3. The voltage quality regulator of claim 2,
the first upper bridge arm switch unit comprises a first triode, a collector of the first triode is connected with a first port of the first capacitive energy storage unit, and an emitter of the first triode is connected with a first port of the first inductive energy storage unit;
the first lower bridge arm switch unit comprises a second triode, a collector of the second triode is connected with the second port of the first inductive energy storage unit, and an emitter of the second triode is connected with the collector of the first triode and the first port of the first capacitive energy storage unit;
the second upper bridge arm switch unit comprises a third triode, and an emitting electrode of the third triode is connected with the first port of the first inductive energy storage unit;
the second lower bridge arm switch unit comprises a fourth triode, a collector of the fourth triode is connected with the second port of the first inductive energy storage unit, and an emitter of the fourth triode is connected with a collector of the third triode and the second port of the first capacitive energy storage unit;
the third upper bridge arm switch unit comprises a fifth triode, and an emitting electrode of the fifth triode is connected with an emitting electrode of the first triode, an emitting electrode of the third triode and a first port of the first inductive energy storage unit;
the third lower bridge arm switch unit comprises a sixth triode, a collector of the sixth triode is connected with a collector of the second triode, a collector of the fourth triode and the second port of the first inductive energy storage unit, and an emitter of the sixth triode is connected with a collector of the fifth triode and the second port of the first capacitive energy storage unit.
4. The voltage quality regulator of claim 3, wherein the inverter bridge module further comprises:
and a first port of the second capacitive energy storage unit is connected with a first port of the second upper bridge arm switch unit and a second port of the second lower bridge arm switch unit, and a second port of the second capacitive energy storage unit is connected with a first port of the third upper bridge arm switch unit and a second port of the third lower bridge arm switch unit.
5. The voltage quality regulator of claim 4,
when the amplitude of the alternating current is in a positive half cycle, controlling the first triode, the fourth triode and the fifth triode to be conducted and controlling the second triode, the third triode and the sixth triode to be turned off in a preset first time period so that the second capacitive energy storage unit outputs a preset first under-voltage compensation voltage;
and when the amplitude of the alternating current is in the positive half cycle, controlling the fourth triode and the fifth triode to be conducted in a preset second time period, and controlling the first triode, the second triode, the third triode and the sixth triode to be turned off so that the second capacitive energy storage unit outputs a preset second undervoltage compensation voltage.
6. The voltage quality regulator of claim 5,
when the amplitude of the alternating current is in a negative half cycle, controlling the second triode, the third triode and the sixth triode to be conducted and controlling the first triode, the fourth triode and the fifth triode to be turned off in the preset first time period, so that the second capacitive energy storage unit outputs a preset third under-voltage compensation voltage;
and when the amplitude of the alternating current is in the negative half cycle, controlling the third triode and the sixth triode to be conducted and controlling the first triode, the second triode, the fourth triode and the fifth triode to be switched off in the preset second time period so that the second capacitive energy storage unit outputs a preset fourth under-voltage compensation voltage.
7. The voltage quality regulator of claim 4,
when the amplitude of the alternating current is in a positive half cycle, controlling the second triode and the third triode to be conducted in a preset first time period, and controlling the first triode, the fourth triode, the fifth triode and the sixth triode to be turned off so that the second capacitive energy storage unit outputs a preset first overvoltage compensation voltage;
and when the amplitude of the alternating current is in the positive half cycle, controlling the second triode, the third triode, the fourth triode and the fifth triode to be conducted in a preset second time period, and controlling the first triode and the sixth triode to be turned off so that the second capacitive energy storage unit outputs a preset second overvoltage compensation voltage.
8. The voltage quality regulator of claim 7,
when the amplitude of the alternating current is in a negative half cycle, controlling the first triode and the fourth triode to be conducted and the second triode, the third triode, the fifth triode and the sixth triode to be turned off in the preset first time period, so that the second capacitive energy storage unit outputs a preset third overvoltage compensation voltage;
and when the amplitude of the alternating current is in the negative half cycle, controlling the first triode, the third triode, the fourth triode and the sixth triode to be conducted in the preset second time period, and controlling the second triode and the fifth triode to be turned off so that the second capacitive energy storage unit outputs a preset fourth overvoltage compensation voltage.
9. The voltage quality regulator of any one of claims 4-8, wherein the inverter bridge module further comprises:
and the first switch unit is connected with the second capacitive energy storage unit in parallel.
10. The voltage quality regulator of any one of claims 1-8, further comprising:
and a first port of the second inductive energy storage unit is connected with the positive input end of the alternating current, and a second port of the second inductive energy storage unit is connected with the first port of the first capacitive energy storage unit.
CN202010896224.0A 2020-08-31 2020-08-31 Voltage quality regulator Active CN112039101B (en)

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CN1588743A (en) * 2004-07-02 2005-03-02 清华大学 Three bridge arm uniform power quality regulator
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CN102064555A (en) * 2010-12-31 2011-05-18 中电普瑞科技有限公司 Chain type STATCOM (Static Synchronous Compensator) chain unit bypass structure with mechanical switch
CN103475225A (en) * 2012-06-06 2013-12-25 比亚迪股份有限公司 Switching power supply system and lineal pressure compensation device for switching power supply
CN104852642A (en) * 2015-05-22 2015-08-19 哈尔滨工程大学 Compensating circuit for restraining torque ripple of brushless DC motor
CN109217647A (en) * 2018-11-16 2019-01-15 中国电子科技集团公司第四十三研究所 A kind of driving circuit and its driving method of positive-negative power power supply half-bridge circuit
CN110137975A (en) * 2019-05-24 2019-08-16 河北德瑞特电器有限公司 New electric energy quality controller and its control method based on current source inverter

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1588743A (en) * 2004-07-02 2005-03-02 清华大学 Three bridge arm uniform power quality regulator
CN1841904A (en) * 2005-04-01 2006-10-04 吴炎喜 Method for shutting thyratron transistor and its thyratron transistor high-pressure frequency converter
CN101345419A (en) * 2008-05-14 2009-01-14 西安交通大学 Series voltage quality regulator and fast investment and cutting method
CN101872965A (en) * 2010-06-18 2010-10-27 中国科学院电工研究所 Current-limiting energy storage circuit and control method thereof
CN102064555A (en) * 2010-12-31 2011-05-18 中电普瑞科技有限公司 Chain type STATCOM (Static Synchronous Compensator) chain unit bypass structure with mechanical switch
CN103475225A (en) * 2012-06-06 2013-12-25 比亚迪股份有限公司 Switching power supply system and lineal pressure compensation device for switching power supply
CN104852642A (en) * 2015-05-22 2015-08-19 哈尔滨工程大学 Compensating circuit for restraining torque ripple of brushless DC motor
CN109217647A (en) * 2018-11-16 2019-01-15 中国电子科技集团公司第四十三研究所 A kind of driving circuit and its driving method of positive-negative power power supply half-bridge circuit
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