CN112290567A - A three-phase power quality compensation device and method based on half-bridge converter - Google Patents

A three-phase power quality compensation device and method based on half-bridge converter Download PDF

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CN112290567A
CN112290567A CN202011544707.0A CN202011544707A CN112290567A CN 112290567 A CN112290567 A CN 112290567A CN 202011544707 A CN202011544707 A CN 202011544707A CN 112290567 A CN112290567 A CN 112290567A
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current
reference value
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CN112290567B (en
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舒泽亮
杨江朋
张帅
冯润波
孟令辉
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Southwest Jiaotong University
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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
    • H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
    • 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
    • H02J3/01—Arrangements for reducing harmonics or ripples
    • 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
    • H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
    • H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
    • H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
    • 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
    • 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
    • Y02E40/40—Arrangements for reducing harmonics
    • 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
    • Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

本发明公开了一种基于半桥变换器的三相电能质量补偿装置及方法，其装置包括电网

Figure 353311DEST_PATH_IMAGE001
、电网
Figure 863052DEST_PATH_IMAGE002
、电网
Figure 336759DEST_PATH_IMAGE003
、负载
Figure DEST_PATH_IMAGE005A
、负载
Figure DEST_PATH_IMAGE007A
、负载
Figure DEST_PATH_IMAGE009A
、滤波电感
Figure 248128DEST_PATH_IMAGE010
、滤波电感
Figure 199903DEST_PATH_IMAGE011
、电流传感器
Figure DEST_PATH_IMAGE013AA
、支撑电容
Figure DEST_PATH_IMAGE015A
、开关管
Figure DEST_PATH_IMAGE017A
和反并联二极管
Figure 100004_DEST_PATH_IMAGE019A
；支撑电容
Figure 100004_DEST_PATH_IMAGE015AA
、开关管
Figure 100004_DEST_PATH_IMAGE017AA
和反并联二极管
Figure 100004_DEST_PATH_IMAGE019AA
组成半桥变换器。本发明采用单相半桥背靠背的拓扑，减少开关管和电流传感器的数量，实时检测三相负载电流。本发明的三相电能质量补偿方法采用
Figure DEST_PATH_IMAGE020
变换和交叉变换得到补偿电流在线电压参考系下的有功分量和无功分量参考值，在旋转坐标系下对补偿电流进行dq解耦控制，能够实现电流跟踪无静差。

Figure 202011544707

The invention discloses a three-phase power quality compensation device and method based on a half-bridge converter. The device includes a power grid.

Figure 353311DEST_PATH_IMAGE001
, power grid
Figure 863052DEST_PATH_IMAGE002
, power grid
Figure 336759DEST_PATH_IMAGE003
,load
Figure DEST_PATH_IMAGE005A
,load
Figure DEST_PATH_IMAGE007A
,load
Figure DEST_PATH_IMAGE009A
, filter inductor
Figure 248128DEST_PATH_IMAGE010
, filter inductor
Figure 199903DEST_PATH_IMAGE011
,current sensor
Figure DEST_PATH_IMAGE013AA
, support capacitor
Figure DEST_PATH_IMAGE015A
,turning tube
Figure DEST_PATH_IMAGE017A
and anti-parallel diodes
Figure 100004_DEST_PATH_IMAGE019A
; support capacitor
Figure 100004_DEST_PATH_IMAGE015AA
,turning tube
Figure 100004_DEST_PATH_IMAGE017AA
and anti-parallel diodes
Figure 100004_DEST_PATH_IMAGE019AA
form a half-bridge converter. The invention adopts the back-to-back topology of the single-phase half-bridge, reduces the number of switching tubes and current sensors, and detects the three-phase load current in real time. The three-phase power quality compensation method of the present invention adopts
Figure DEST_PATH_IMAGE020
Transform and cross-transform to obtain the reference values of active and reactive components of the compensation current in the on-line voltage reference system, and perform dq decoupling control of the compensation current in the rotating coordinate system, which can realize current tracking without static error.

Figure 202011544707

Description

一种基于半桥变换器的三相电能质量补偿装置及方法A three-phase power quality compensation device and method based on half-bridge converter

技术领域technical field

本发明属于电能补偿装置技术领域，具体涉及一种基于半桥变换器的三相电能质量补偿装置及方法。The invention belongs to the technical field of electric energy compensation devices, and in particular relates to a three-phase electric energy quality compensation device and method based on a half-bridge converter.

背景技术Background technique

目前，我国低压配电网中绝大部分民用负荷以单相负荷为主，由于用户用电的随机性与波动性，导致配电网常出现三相不平衡和功率因素降低的问题。三相系统不平衡会导致电压和电流中含有大量的负序和零序分量，影响电气设备的正常运行。功率因数降低会导致设备容量利用少，线路电流增大，损耗增加。目前三相电能质量补偿的方案主要是投切并联电容器和使用三相有源电力滤波器。投切电容器的方案价格便宜，原理简单，但是无法精确补偿无功，且不能实现动态补偿，在系统有谐波时，还可能发生并联谐振。三相有源电力滤波器通过内部逆变器产生特定的补偿电流，馈入电网，抵消网侧不平衡电流和无功电流。但是三相有源电力滤波器需要使用较多的开关器件和电流传感器，成本较高，并且由于目标补偿电流是交流信号，采用瞬态电流控制会有稳态误差，难以实现良好的电流跟踪性能。At present, most of the civil loads in my country's low-voltage distribution network are dominated by single-phase loads. Due to the randomness and volatility of users' electricity consumption, the distribution network often has problems of three-phase unbalance and power factor reduction. The unbalanced three-phase system will cause a large number of negative sequence and zero sequence components in the voltage and current, which will affect the normal operation of electrical equipment. Reduced power factor results in less capacity utilization of equipment, increased line current, and increased losses. At present, the three-phase power quality compensation schemes mainly include switching capacitors in parallel and using three-phase active power filters. The scheme of switching capacitors is cheap and the principle is simple, but it cannot accurately compensate reactive power, and cannot achieve dynamic compensation. When there are harmonics in the system, parallel resonance may also occur. The three-phase active power filter generates a specific compensation current through the internal inverter, which is fed into the grid to offset the unbalanced current and reactive current on the grid side. However, the three-phase active power filter needs to use more switching devices and current sensors, and the cost is high, and because the target compensation current is an AC signal, the use of transient current control will have steady-state errors, and it is difficult to achieve good current tracking performance. .

发明内容SUMMARY OF THE INVENTION

本发明的目的是为了解决三相电能质量补偿的问题，提出了一种基于半桥变换器的三相电能质量补偿装置及方法。The purpose of the present invention is to solve the problem of three-phase power quality compensation, and proposes a three-phase power quality compensation device and method based on a half-bridge converter.

本发明的技术方案是：一种基于半桥变换器的三相电能质量补偿装置包括电网

Figure 100002_DEST_PATH_IMAGE002AAA
、电网
Figure 100002_DEST_PATH_IMAGE004AAAA
、电网
Figure 100002_DEST_PATH_IMAGE006AAAA
、负载
Figure 697943DEST_PATH_IMAGE007
、负载
Figure 673989DEST_PATH_IMAGE008
、负载
Figure 542588DEST_PATH_IMAGE009
、滤波电感
Figure DEST_PATH_IMAGE011AAA
、滤波电感
Figure DEST_PATH_IMAGE013AAAAAAAAA
、电流传感器
Figure DEST_PATH_IMAGE015AAAAA
、支撑电容
Figure DEST_PATH_IMAGE017AAAAAAA
、开关管
Figure DEST_PATH_IMAGE019AAAAAA
和反并联二极管
Figure DEST_PATH_IMAGE021AAAAAA
；The technical scheme of the present invention is as follows: a three-phase power quality compensation device based on a half-bridge converter comprises a power grid
Figure 100002_DEST_PATH_IMAGE002AAA
, power grid
Figure 100002_DEST_PATH_IMAGE004AAAA
, power grid
Figure 100002_DEST_PATH_IMAGE006AAAA
,load
Figure 697943DEST_PATH_IMAGE007
,load
Figure 673989DEST_PATH_IMAGE008
,load
Figure 542588DEST_PATH_IMAGE009
, filter inductor
Figure DEST_PATH_IMAGE011AAA
, filter inductor
Figure DEST_PATH_IMAGE013AAAAAAAAA
,current sensor
Figure DEST_PATH_IMAGE015AAAAA
, support capacitor
Figure DEST_PATH_IMAGE017AAAAAAA
,turning tube
Figure DEST_PATH_IMAGE019AAAAAA
and anti-parallel diodes
Figure DEST_PATH_IMAGE021AAAAAA
;

电网

Figure DEST_PATH_IMAGE023AAAAAA
的正极分别与滤波电感
Figure DEST_PATH_IMAGE025AAA
的一端和电流传感器
Figure DEST_PATH_IMAGE027AAAAAAAA
的一端连接，其负极分别与电网
Figure DEST_PATH_IMAGE029AAAAAA
的负极和电网
Figure DEST_PATH_IMAGE031AAA
的负极连接；电网
Figure 100002_DEST_PATH_IMAGE004AAAAA
的正极分别与滤波电感
Figure DEST_PATH_IMAGE013AAAAAAAAAA
的一端和电流传感器
Figure 100002_DEST_PATH_IMAGE033AAAAA
的一端连接；电网
Figure 100002_DEST_PATH_IMAGE006AAAAA
的正极和电流传感器
Figure DEST_PATH_IMAGE035AAAAAAAA
的一端连接，其连接点还与支撑电容
Figure 200708DEST_PATH_IMAGE036
的一端和支撑电容
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的一端连接的连接点连接；电流传感器
Figure DEST_PATH_IMAGE027AAAAAAAAA
的另一端和负载
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的一端连接；电流传感器
Figure DEST_PATH_IMAGE033AAAAAA
的另一端和负载
Figure 32026DEST_PATH_IMAGE008
的一端连接；电流传感器
Figure DEST_PATH_IMAGE035AAAAAAAAA
的另一端和负载
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的一端连接；负载
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的另一端分别与负载
Figure 347229DEST_PATH_IMAGE008
的另一端和负载
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的另一端连接；滤波电感
Figure DEST_PATH_IMAGE039AAAAAAAAAAAAAAAA
的另一端和电流传感器
Figure DEST_PATH_IMAGE041AAAAAAAA
的一端连接；滤波电感
Figure DEST_PATH_IMAGE043AAAAAAAAAAAAAAA
的另一端和电流传感器
Figure DEST_PATH_IMAGE045AAAAA
的一端连接；电流传感器
Figure DEST_PATH_IMAGE041AAAAAAAAA
的另一端分别与开关管
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的发射极、反并联二极管
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的正极、开关管
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的集电极和反并联二极管
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的负极连接；开关管
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的集电极分别与反并联二极管
Figure DEST_PATH_IMAGE050AAAAAA
的负极、支撑电容
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的另一端、开关管
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的集电极和反并联二极管
Figure DEST_PATH_IMAGE053AAA
的负极连接；电流传感器
Figure DEST_PATH_IMAGE045AAAAAA
的另一端分别与开关管
Figure 740240DEST_PATH_IMAGE051
的发射极、反并联二极管
Figure 100002_DEST_PATH_IMAGE055AAA
的正极、开关管
Figure 495707DEST_PATH_IMAGE056
的集电极和反并联二极管
Figure DEST_PATH_IMAGE058AAAAAAA
的负极连接；开关管
Figure 619520DEST_PATH_IMAGE056
的发射极分别与反并联二极管
Figure DEST_PATH_IMAGE060AAA
的正极、支撑电容
Figure 61128DEST_PATH_IMAGE037
的另一端、开关管
Figure 676917DEST_PATH_IMAGE048
的发射极和反并联二极管
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的正极连接；grid
Figure DEST_PATH_IMAGE023AAAAAA
The positive poles are respectively connected with the filter inductor
Figure DEST_PATH_IMAGE025AAA
one end and the current sensor
Figure DEST_PATH_IMAGE027AAAAAAAA
One end is connected to the grid, and its negative poles are respectively connected to the grid
Figure DEST_PATH_IMAGE029AAAAAA
negative pole and grid
Figure DEST_PATH_IMAGE031AAA
negative connection; grid
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The positive poles are respectively connected with the filter inductor
Figure DEST_PATH_IMAGE013AAAAAAAAAA
one end and the current sensor
Figure 100002_DEST_PATH_IMAGE033AAAAA
one end of the connection; grid
Figure 100002_DEST_PATH_IMAGE006AAAAA
positive and current sensors
Figure DEST_PATH_IMAGE035AAAAAAAA
one end of , and its connection point is also connected to the supporting capacitor
Figure 200708DEST_PATH_IMAGE036
one end and support capacitor
Figure 270295DEST_PATH_IMAGE037
one end of the connection point connection; current sensor
Figure DEST_PATH_IMAGE027AAAAAAAAA
the other end and the load
Figure 890894DEST_PATH_IMAGE007
one end of the connection; current sensor
Figure DEST_PATH_IMAGE033AAAAAA
the other end and the load
Figure 32026DEST_PATH_IMAGE008
one end of the connection; current sensor
Figure DEST_PATH_IMAGE035AAAAAAAAA
the other end and the load
Figure 61161DEST_PATH_IMAGE009
one end of the connection; load
Figure 662169DEST_PATH_IMAGE007
the other end of the respectively and the load
Figure 347229DEST_PATH_IMAGE008
the other end and the load
Figure 88789DEST_PATH_IMAGE009
The other end of the connection; filter inductor
Figure DEST_PATH_IMAGE039AAAAAAAAAAAAAAAA
the other end and the current sensor
Figure DEST_PATH_IMAGE041AAAAAAAA
one end of the connection; filter inductor
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the other end and the current sensor
Figure DEST_PATH_IMAGE045AAAAA
one end of the connection; current sensor
Figure DEST_PATH_IMAGE041AAAAAAAAA
The other end of , respectively, is connected with the switch tube
Figure 723163DEST_PATH_IMAGE046
emitter, anti-parallel diode
Figure 993608DEST_PATH_IMAGE047
positive pole, switch tube
Figure 900384DEST_PATH_IMAGE048
The collector and anti-parallel diodes
Figure DEST_PATH_IMAGE050AAAAA
negative connection; switch tube
Figure 884783DEST_PATH_IMAGE046
The collectors are respectively connected with anti-parallel diodes
Figure DEST_PATH_IMAGE050AAAAAA
negative electrode, supporting capacitor
Figure 747565DEST_PATH_IMAGE036
the other end of the switch tube
Figure 329856DEST_PATH_IMAGE051
The collector and anti-parallel diodes
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negative connection of ; current sensor
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The other end of , respectively, is connected with the switch tube
Figure 740240DEST_PATH_IMAGE051
emitter, anti-parallel diode
Figure 100002_DEST_PATH_IMAGE055AAA
positive pole, switch tube
Figure 495707DEST_PATH_IMAGE056
The collector and anti-parallel diodes
Figure DEST_PATH_IMAGE058AAAAAAA
negative connection; switch tube
Figure 619520DEST_PATH_IMAGE056
The emitters are respectively connected with anti-parallel diodes
Figure DEST_PATH_IMAGE060AAA
positive electrode, support capacitor
Figure 61128DEST_PATH_IMAGE037
the other end of the switch tube
Figure 676917DEST_PATH_IMAGE048
The emitter and anti-parallel diode
Figure DEST_PATH_IMAGE062AAA
positive connection of ;

支撑电容

Figure DEST_PATH_IMAGE017AAAAAAAA
、开关管
Figure DEST_PATH_IMAGE019AAAAAAA
和反并联二极管
Figure DEST_PATH_IMAGE021AAAAAAA
组成半桥变换器；负载
Figure 455649DEST_PATH_IMAGE007
、负载
Figure 230707DEST_PATH_IMAGE008
和负载
Figure 154800DEST_PATH_IMAGE009
组成不平衡负载；Support capacitor
Figure DEST_PATH_IMAGE017AAAAAAAA
,turning tube
Figure DEST_PATH_IMAGE019AAAAAAA
and anti-parallel diodes
Figure DEST_PATH_IMAGE021AAAAAAA
Form a half-bridge converter; load
Figure 455649DEST_PATH_IMAGE007
,load
Figure 230707DEST_PATH_IMAGE008
and load
Figure 154800DEST_PATH_IMAGE009
form an unbalanced load;

电流传感器

Figure DEST_PATH_IMAGE064AAAA
均用于测量负载电流，电流传感器
Figure DEST_PATH_IMAGE066AAA
和
Figure DEST_PATH_IMAGE068AAA
分别用于测量A相和B相的补偿电流。current sensor
Figure DEST_PATH_IMAGE064AAAA
are used to measure load current, current sensor
Figure DEST_PATH_IMAGE066AAA
and
Figure DEST_PATH_IMAGE068AAA
It is used to measure the compensation current of A-phase and B-phase, respectively.

基于以上系统，本发明还提出一种基于半桥变换器的三相电能质量补偿方法，包括以下步骤：Based on the above system, the present invention also proposes a three-phase power quality compensation method based on a half-bridge converter, comprising the following steps:

S1：利用锁相环对网侧电压的相位进行锁定，并获取三相网侧电压的相位；S1: Use the phase-locked loop to lock the phase of the grid-side voltage, and obtain the phase of the three-phase grid-side voltage;

S2：根据三相网侧电压的相位，对A相网侧电压、三相负载电流和补偿电流进行旋转坐标转换，得到A相网侧电压的有功分量和无功分量、三相负载电流的有功分量和无功分量与补偿电流的有功分量和无功分量；S2: According to the phase of the three-phase grid-side voltage, perform rotational coordinate transformation on the A-phase grid-side voltage, three-phase load current and compensation current to obtain the active and reactive components of the A-phase grid-side voltage, and the active power of the three-phase load current. Component and reactive component and active component and reactive component of compensation current;

S3：将三相负载电流的有功分量和无功分量、补偿电流的有功分量和无功分量与维持直流电压稳定的有功电流进行

Figure DEST_PATH_IMAGE070AAA
变换，得到补偿电流在相电压参考系下的有功分量参考值和无功分量参考值；S3: Compare the active and reactive components of the three-phase load current, the active and reactive components of the compensation current, and the active current that maintains DC voltage stability.
Figure DEST_PATH_IMAGE070AAA
Transform to obtain the reference value of active component and reference value of reactive component of the compensation current in the phase voltage reference frame;

S4：将补偿电流在相电压参考系下的有功分量参考值和无功分量参考值进行交叉变换，得到补偿电流在线电压参考系下的有功分量参考值和无功分量参考值；S4: Cross-transform the active component reference value and reactive component reference value of the compensation current in the phase voltage reference system to obtain the active component reference value and reactive component reference value of the compensation current in the on-line voltage reference system;

S5：根据A相网侧电压的有功分量和无功分量，将补偿电流的有功分量和无功分量与补偿电流在线电压参考系下的有功分量参考值和无功分量参考值进行dq解耦控制，得到半桥变换器调制信号的有功分量和无功分量；S5: According to the active and reactive components of the A-phase grid-side voltage, perform dq decoupling control on the active and reactive components of the compensation current and the reference values of the active components and reactive components of the compensation current in the on-line voltage reference system , obtain the active and reactive components of the half-bridge converter modulation signal;

S6：将半桥变换器调制信号的有功分量和无功分量进行旋转坐标逆变换，得到半桥变换器的调制信号；S6: Inversely transform the rotation coordinates of the active component and the reactive component of the modulation signal of the half-bridge converter to obtain the modulation signal of the half-bridge converter;

S7：将半桥变换器的调制信号进行PWM调制，得到半桥变换器开关管的驱动信号，完成基于半桥变换器的三相电能质量补偿。S7: PWM modulation is performed on the modulation signal of the half-bridge converter to obtain the driving signal of the switching tube of the half-bridge converter, and the three-phase power quality compensation based on the half-bridge converter is completed.

本发明的有益效果是：三相有功平衡和无功为零时，网侧电流有功分量和无功分量满足步骤S2的表达式；为了维持直流侧电容电压的稳定，需要将直流侧电容电压的闭环输出作为动态调整的有功电流，注入到补偿电流中，得到电压环的表达式；根据基尔霍夫电流定律和三相平衡及无功为零的条件进行

Figure 652691DEST_PATH_IMAGE071
变换。三相三线制电路中，C相补偿电流为A相补偿电流与B相补偿电流之和的相反数，因此仅需控制A相和B相补偿电流，当A相和B相补偿电流满足步骤S32中的公式时，三相网侧电流将处于平衡状态，功率因数为1；由于变换器接入的是网侧线电压，而补偿电流是注入到网侧相电流中，相线之间存在30度相角差，因此需要进行角度转换；补偿电流在线电压参考系下的有功分量参考值和无功分量参考值也是控制系统中实际的补偿电流参考值。The beneficial effects of the invention are: when the three-phase active power is balanced and the reactive power is zero, the active and reactive components of the grid-side current satisfy the expression of step S2; in order to maintain the stability of the DC-side capacitor voltage, it is necessary to adjust the DC-side capacitor voltage to The closed-loop output, as a dynamically adjusted active current, is injected into the compensation current to obtain the expression of the voltage loop; according to Kirchhoff's current law and the conditions of three-phase balance and zero reactive power
Figure 652691DEST_PATH_IMAGE071
transform. In the three-phase three-wire circuit, the C-phase compensation current is the inverse of the sum of the A-phase compensation current and the B-phase compensation current, so it is only necessary to control the A-phase and B-phase compensation currents. When the A-phase and B-phase compensation currents satisfy step S32 When the formula in , the three-phase grid-side current will be in a balanced state, and the power factor is 1; since the converter is connected to the grid-side line voltage, and the compensation current is injected into the grid-side phase current, there is a 30-degree angle between the phase lines. The phase angle difference, so angle conversion is required; the reference value of the active component and the reference value of the reactive component of the compensation current under the on-line voltage reference system are also the actual reference value of the compensation current in the control system.

本发明提出一种基于半桥变换器的三相电能质量补偿装置，采用单相半桥背靠背的拓扑，减少开关管和电流传感器的数量，实时检测三相负载电流，相对于传统的并联电容器，本发明既可以动态补偿无功，也可以动态补偿有功不平衡，不易发生谐振。相对于传统的三相有源电力滤波器，本发明可以减少两个开关管和一个电流传感器，降低成本，经济性强。本发明的三相电能质量补偿方法采用

Figure 100002_DEST_PATH_IMAGE073AA
变换和交叉变换得到补偿电流在线电压参考系下的有功分量和无功分量参考值，在旋转坐标系下对补偿电流进行dq解耦控制，能够实现电流跟踪无静差，具有良好的电流跟踪性能，实现三相不平衡和无功的动态补偿，可应用到二极管钳位多电平拓扑和模块化多电平（MMC）拓扑，具有较强的适用性与延展性。The invention proposes a three-phase power quality compensation device based on a half-bridge converter, which adopts a single-phase half-bridge back-to-back topology, reduces the number of switching tubes and current sensors, and detects the three-phase load current in real time. Compared with the traditional parallel capacitor, the The present invention can not only compensate reactive power dynamically, but also dynamically compensate the unbalance of active power, so that resonance is not easy to occur. Compared with the traditional three-phase active power filter, the present invention can reduce two switching tubes and one current sensor, thereby reducing the cost and being highly economical. The three-phase power quality compensation method of the present invention adopts
Figure 100002_DEST_PATH_IMAGE073AA
Transform and cross-transform to obtain the reference values of active and reactive components of the compensation current in the on-line voltage reference system, and perform dq decoupling control of the compensation current in the rotating coordinate system, which can realize current tracking without static error and has good current tracking performance. , to achieve dynamic compensation of three-phase unbalance and reactive power, and can be applied to diode-clamped multi-level topology and modular multi-level (MMC) topology, with strong applicability and ductility.

进一步地，步骤S2中，对A相网侧电压进行旋转坐标转换的公式为：Further, in step S2, the formula for the rotation coordinate transformation of the voltage on the A-phase grid side is:

Figure DEST_PATH_IMAGE075AAA
Figure DEST_PATH_IMAGE075AAA

对A相负载电流和补偿电流进行旋转坐标转换的公式分别为：The formulas for the rotation coordinate transformation of the A-phase load current and compensation current are:

Figure DEST_PATH_IMAGE077AAA
Figure DEST_PATH_IMAGE077AAA

其中，

Figure DEST_PATH_IMAGE079AAA
表示A相网侧电压的有功分量，
Figure DEST_PATH_IMAGE081AAA
表示A相网侧电压的无功分量，对A相网侧电压进行旋转坐标转换的二阶变换矩阵为P矩阵，
Figure DEST_PATH_IMAGE023AAAAAAA
表示A相网侧电压，
Figure DEST_PATH_IMAGE083AAA
表示相位滞后于A相网侧电压的虚拟电压，
Figure DEST_PATH_IMAGE085AAA
表示A相负载电流的有功分量，
Figure DEST_PATH_IMAGE087AAA
表示A相负载电流的无功分量，
Figure DEST_PATH_IMAGE089AAA
表示A相补偿电流的有功分量，
Figure DEST_PATH_IMAGE091AAA
表示A相补偿电流的无功分量，
Figure DEST_PATH_IMAGE093AAA
表示A相负载电流，
Figure DEST_PATH_IMAGE095AAA
表示相位滞后于A相负载交流的虚拟电流，
Figure DEST_PATH_IMAGE097AAA
表示A相补偿电流，
Figure DEST_PATH_IMAGE099AAAAA
表示相位滞后于A相补偿电流的虚拟电流，
Figure DEST_PATH_IMAGE101AAA
表示电网角频率，t表示时间；in,
Figure DEST_PATH_IMAGE079AAA
Represents the active component of the A-phase grid-side voltage,
Figure DEST_PATH_IMAGE081AAA
Represents the reactive component of the voltage on the A-phase grid side, and the second-order transformation matrix for the rotational coordinate transformation of the A-phase grid side voltage is the P matrix,
Figure DEST_PATH_IMAGE023AAAAAAA
Indicates the A-phase grid side voltage,
Figure DEST_PATH_IMAGE083AAA
represents the virtual voltage whose phase lags behind the A-phase grid-side voltage,
Figure DEST_PATH_IMAGE085AAA
represents the active component of the A-phase load current,
Figure DEST_PATH_IMAGE087AAA
Represents the reactive component of the A-phase load current,
Figure DEST_PATH_IMAGE089AAA
Represents the active component of the A-phase compensation current,
Figure DEST_PATH_IMAGE091AAA
Represents the reactive component of the A-phase compensation current,
Figure DEST_PATH_IMAGE093AAA
represents the phase A load current,
Figure DEST_PATH_IMAGE095AAA
Represents the virtual current that the phase lags behind the A-phase load AC,
Figure DEST_PATH_IMAGE097AAA
Indicates the A-phase compensation current,
Figure DEST_PATH_IMAGE099AAAAA
represents the virtual current whose phase lags behind the A-phase compensation current,
Figure DEST_PATH_IMAGE101AAA
represents the grid angular frequency, and t represents the time;

对B相负载电流和补偿电流进行旋转坐标转换的公式分别为：The formulas for the rotation coordinate transformation of the B-phase load current and compensation current are:

Figure DEST_PATH_IMAGE103AAA
Figure DEST_PATH_IMAGE103AAA

其中，

Figure DEST_PATH_IMAGE105AAAAAA
表示B相负载电流的有功分量，
Figure DEST_PATH_IMAGE107AAA
表示B相负载电流的无功分量，
Figure 100002_DEST_PATH_IMAGE109AAA
表示B相补偿电流的有功分量，
Figure DEST_PATH_IMAGE111AAA
表示B相补偿电流的无功分量，
Figure DEST_PATH_IMAGE113AAA
表示B相负载电流，
Figure DEST_PATH_IMAGE115AAA
表示相位滞后于B相负载交流的虚拟电流，
Figure DEST_PATH_IMAGE117AAA
表示B相补偿电流，
Figure 100002_DEST_PATH_IMAGE119AAA
表示相位滞后于B相补偿电流的虚拟电流；in,
Figure DEST_PATH_IMAGE105AAAAAA
represents the active component of the B-phase load current,
Figure DEST_PATH_IMAGE107AAA
Represents the reactive component of the B-phase load current,
Figure 100002_DEST_PATH_IMAGE109AAA
represents the active component of the B-phase compensation current,
Figure DEST_PATH_IMAGE111AAA
Represents the reactive component of the B-phase compensation current,
Figure DEST_PATH_IMAGE113AAA
represents the B-phase load current,
Figure DEST_PATH_IMAGE115AAA
represents the virtual current that the phase lags behind the B-phase load AC,
Figure DEST_PATH_IMAGE117AAA
represents the B-phase compensation current,
Figure 100002_DEST_PATH_IMAGE119AAA
Indicates the virtual current whose phase lags behind the B-phase compensation current;

对C相负载电流和补偿电流进行旋转坐标转换的公式分别为：The formulas for the rotation coordinate transformation of the C-phase load current and compensation current are:

Figure DEST_PATH_IMAGE121AAA
Figure DEST_PATH_IMAGE121AAA

其中，

Figure DEST_PATH_IMAGE123AAAAA
表示C相负载电流的有功分量，
Figure DEST_PATH_IMAGE125AAA
表示C相负载电流的无功分量，
Figure DEST_PATH_IMAGE127AAA
表示C相补偿电流的有功分量，
Figure DEST_PATH_IMAGE129AAA
表示C相补偿电流的无功分量，
Figure DEST_PATH_IMAGE131AAA
表示C相负载电流，
Figure DEST_PATH_IMAGE123AAAAAA
表示相位滞后于C相负载交流的虚拟电流，
Figure DEST_PATH_IMAGE133AAA
表示C相补偿电流，
Figure DEST_PATH_IMAGE135AAA
表示相位滞后于C相补偿电流的虚拟电流。in,
Figure DEST_PATH_IMAGE123AAAAA
represents the active component of the C-phase load current,
Figure DEST_PATH_IMAGE125AAA
represents the reactive component of the C-phase load current,
Figure DEST_PATH_IMAGE127AAA
represents the active component of the C-phase compensation current,
Figure DEST_PATH_IMAGE129AAA
Represents the reactive component of the C-phase compensation current,
Figure DEST_PATH_IMAGE131AAA
represents the C-phase load current,
Figure DEST_PATH_IMAGE123AAAAAA
represents the virtual current whose phase lags behind the C-phase load AC,
Figure DEST_PATH_IMAGE133AAA
represents the C-phase compensation current,
Figure DEST_PATH_IMAGE135AAA
Indicates a virtual current whose phase lags behind the C-phase compensation current.

进一步地，步骤S2中，三相网侧电流的有功分量和无功分量满足的表达式为：Further, in step S2, the expressions satisfied by the active and reactive components of the three-phase grid-side current are:

Figure 659216DEST_PATH_IMAGE136
Figure 659216DEST_PATH_IMAGE136

其中，

Figure 429726DEST_PATH_IMAGE137
表示A相网侧电流有功分量的参考值，
Figure 649355DEST_PATH_IMAGE138
表示B相网侧电流有功分量的参考值，
Figure 239736DEST_PATH_IMAGE139
表示C相网侧电流有功分量的参考值，
Figure 343959DEST_PATH_IMAGE140
表示A相网侧电流无功分量的参考值，
Figure 595074DEST_PATH_IMAGE141
表示B相网侧电流无功分量的参考值，
Figure 860970DEST_PATH_IMAGE142
表示C相网侧电流无功分量的参考值，
Figure DEST_PATH_IMAGE144AAAAA
表示A相负载电流的有功分量，
Figure DEST_PATH_IMAGE146AAAAA
表示B相负载电流的有功分量，
Figure DEST_PATH_IMAGE148AAAAA
表示C相负载电流的有功分量。in,
Figure 429726DEST_PATH_IMAGE137
Indicates the reference value of the active component of the A-phase grid side current,
Figure 649355DEST_PATH_IMAGE138
Indicates the reference value of the active component of the B-phase grid-side current,
Figure 239736DEST_PATH_IMAGE139
Indicates the reference value of the active component of the C-phase grid side current,
Figure 343959DEST_PATH_IMAGE140
Represents the reference value of the reactive component of the A-phase grid side current,
Figure 595074DEST_PATH_IMAGE141
Represents the reference value of the reactive power component of the B-phase grid side current,
Figure 860970DEST_PATH_IMAGE142
Represents the reference value of the reactive component of the C-phase grid side current,
Figure DEST_PATH_IMAGE144AAAAA
represents the active component of the A-phase load current,
Figure DEST_PATH_IMAGE146AAAAA
represents the active component of the B-phase load current,
Figure DEST_PATH_IMAGE148AAAAA
Indicates the active component of the C-phase load current.

进一步地，步骤S3包括以下子步骤：Further, step S3 includes the following sub-steps:

S31：将直流侧电容电压的闭环输出注入至补偿电流中，得到维持直流电压稳定的有功电流

Figure DEST_PATH_IMAGE150AAAAA
；S31: Inject the closed-loop output of the DC side capacitor voltage into the compensation current to obtain an active current that maintains a stable DC voltage
Figure DEST_PATH_IMAGE150AAAAA
;

S32：对三相负载电流的有功分量和无功分量、补偿电流的有功分量和无功分量与维持直流电压稳定的有功电流

Figure DEST_PATH_IMAGE152AAAA
进行
Figure 141910DEST_PATH_IMAGE071
变换，得到补偿电流在相电压参考系下的有功分量参考值和无功分量参考值。S32: For the active and reactive components of the three-phase load current, the active and reactive components of the compensation current, and the active current for maintaining the stability of the DC voltage
Figure DEST_PATH_IMAGE152AAAA
conduct
Figure 141910DEST_PATH_IMAGE071
Transform to obtain the active component reference value and reactive component reference value of the compensation current in the phase voltage reference frame.

进一步地，步骤S31中，维持直流电压稳定的有功电流

Figure DEST_PATH_IMAGE150AAAAAA
的计算公式为：Further, in step S31, maintain a stable active current of the DC voltage
Figure DEST_PATH_IMAGE150AAAAAA
The calculation formula is:

Figure 846560DEST_PATH_IMAGE153
Figure 846560DEST_PATH_IMAGE153

其中，S表示复频率，

Figure DEST_PATH_IMAGE155AA
表示电压环的第一控制参数，
Figure DEST_PATH_IMAGE157AA
表示电压环的第二控制参数，
Figure 217761DEST_PATH_IMAGE158
表示直流侧电压的参考值，
Figure DEST_PATH_IMAGE160AAAA
表示直流侧电压。where S is the complex frequency,
Figure DEST_PATH_IMAGE155AA
represents the first control parameter of the voltage loop,
Figure DEST_PATH_IMAGE157AA
represents the second control parameter of the voltage loop,
Figure 217761DEST_PATH_IMAGE158
Indicates the reference value of the DC side voltage,
Figure DEST_PATH_IMAGE160AAAA
Indicates the DC side voltage.

进一步地，步骤S32中，对A相负载电流的有功分量和无功分量、补偿电流的有功分量和无功分量与维持直流电压稳定的有功电流

Figure DEST_PATH_IMAGE162AAAAA
进行
Figure DEST_PATH_IMAGE164AAAAAA
变换的公式分别为：Further, in step S32, the active and reactive components of the A-phase load current, the active and reactive components of the compensation current and the active current for maintaining the DC voltage stability are compared.
Figure DEST_PATH_IMAGE162AAAAA
conduct
Figure DEST_PATH_IMAGE164AAAAAA
The transformation formulas are:

Figure 608554DEST_PATH_IMAGE165
Figure 608554DEST_PATH_IMAGE165

Figure 298161DEST_PATH_IMAGE166
；
Figure 298161DEST_PATH_IMAGE166
;

对B相负载电流的有功分量和无功分量、补偿电流的有功分量和无功分量与维持直流电压稳定的有功电流

Figure DEST_PATH_IMAGE168AAA
进行
Figure DEST_PATH_IMAGE164AAAAAAA
变换的公式分别为：For the active and reactive components of the B-phase load current, the active and reactive components of the compensation current, and the active current for maintaining the stability of the DC voltage
Figure DEST_PATH_IMAGE168AAA
conduct
Figure DEST_PATH_IMAGE164AAAAAAA
The transformation formulas are:

Figure 868819DEST_PATH_IMAGE169
Figure 868819DEST_PATH_IMAGE169

其中，

Figure 94527DEST_PATH_IMAGE170
表示A相补偿电流在相电压参考系下的有功分量参考值，
Figure 702226DEST_PATH_IMAGE171
表示A相补偿电流在相电压参考系下的无功分量参考值，
Figure 613550DEST_PATH_IMAGE172
表示B相补偿电流在相电压参考系下的有功分量参考值，
Figure 863266DEST_PATH_IMAGE173
表示B相补偿电流在相电压参考系下的无功分量参考值，
Figure DEST_PATH_IMAGE175AAAA
表示A相负载电流的有功分量，
Figure DEST_PATH_IMAGE177AAAAA
表示B相负载电流的有功分量，
Figure DEST_PATH_IMAGE179AAAAAAA
表示C相负载电流的有功分量，
Figure DEST_PATH_IMAGE181AAAAA
表示A相负载电流的无功分量，
Figure DEST_PATH_IMAGE183AAAAA
表示B相负载电流的无功分量；in,
Figure 94527DEST_PATH_IMAGE170
Indicates the reference value of the active component of the A-phase compensation current in the phase voltage reference frame,
Figure 702226DEST_PATH_IMAGE171
Represents the reference value of the reactive component of the A-phase compensation current in the phase voltage reference frame,
Figure 613550DEST_PATH_IMAGE172
Represents the reference value of the active component of the B-phase compensation current in the phase voltage reference frame,
Figure 863266DEST_PATH_IMAGE173
Represents the reference value of the reactive component of the B-phase compensation current in the phase voltage reference frame,
Figure DEST_PATH_IMAGE175AAAA
represents the active component of the A-phase load current,
Figure DEST_PATH_IMAGE177AAAAA
represents the active component of the B-phase load current,
Figure DEST_PATH_IMAGE179AAAAAAA
represents the active component of the C-phase load current,
Figure DEST_PATH_IMAGE181AAAAA
Represents the reactive component of the A-phase load current,
Figure DEST_PATH_IMAGE183AAAAA
Represents the reactive component of the B-phase load current;

所述步骤S32中，根据基尔霍夫电流定律，网侧电流有功分量参考值和无功分量参考值、负载电流的有功分量和无功分量以及补偿电流在相电压参考系下有功分量参考值和无功分量参考值满足的表达式为：In the step S32, according to Kirchhoff's current law, the reference value of the active component and the reference value of the reactive component of the grid-side current, the active component and the reactive component of the load current, and the reference value of the active component of the compensation current in the phase voltage reference frame The expression satisfied by the reference value of the reactive power component is:

Figure 396009DEST_PATH_IMAGE184
Figure 396009DEST_PATH_IMAGE184

其中，

Figure 440189DEST_PATH_IMAGE137
表示A相网侧电流有功分量的参考值，
Figure 838809DEST_PATH_IMAGE138
表示B相网侧电流有功分量的参考值，
Figure 361057DEST_PATH_IMAGE139
表示C相网侧电流有功分量的参考值，
Figure 284059DEST_PATH_IMAGE140
表示A相网侧电流无功分量的参考值，
Figure 233560DEST_PATH_IMAGE141
表示B相网侧电流无功分量的参考值，
Figure 385056DEST_PATH_IMAGE142
表示C相网侧电流无功分量的参考值，
Figure DEST_PATH_IMAGE186AAA
表示A相负载电流的有功分量，
Figure DEST_PATH_IMAGE188AAA
表示B相负载电流的有功分量，
Figure DEST_PATH_IMAGE190AAA
表示C相负载电流的有功分量，
Figure DEST_PATH_IMAGE192AAA
表示A相负载电流的无功分量，
Figure DEST_PATH_IMAGE194AAA
表示B相负载电流的无功分量，
Figure DEST_PATH_IMAGE196AAA
表示C相负载电流的无功分量，
Figure 851940DEST_PATH_IMAGE197
表示C相补偿电流在相电压参考系下的有功分量参考值，
Figure 280647DEST_PATH_IMAGE198
表示C相补偿电流在相电压参考系下的无功分量参考值。in,
Figure 440189DEST_PATH_IMAGE137
Represents the reference value of the active component of the A-phase grid side current,
Figure 838809DEST_PATH_IMAGE138
Indicates the reference value of the active component of the B-phase grid-side current,
Figure 361057DEST_PATH_IMAGE139
Indicates the reference value of the active component of the C-phase grid side current,
Figure 284059DEST_PATH_IMAGE140
Represents the reference value of the reactive component of the A-phase grid side current,
Figure 233560DEST_PATH_IMAGE141
Represents the reference value of the reactive component of the B-phase grid side current,
Figure 385056DEST_PATH_IMAGE142
Represents the reference value of the reactive component of the C-phase grid side current,
Figure DEST_PATH_IMAGE186AAA
represents the active component of the A-phase load current,
Figure DEST_PATH_IMAGE188AAA
represents the active component of the B-phase load current,
Figure DEST_PATH_IMAGE190AAA
represents the active component of the C-phase load current,
Figure DEST_PATH_IMAGE192AAA
Represents the reactive component of the A-phase load current,
Figure DEST_PATH_IMAGE194AAA
Represents the reactive component of the B-phase load current,
Figure DEST_PATH_IMAGE196AAA
represents the reactive component of the C-phase load current,
Figure 851940DEST_PATH_IMAGE197
Represents the reference value of the active component of the C-phase compensation current in the phase voltage reference frame,
Figure 280647DEST_PATH_IMAGE198
Indicates the reference value of the reactive component of the C-phase compensation current in the phase voltage reference frame.

进一步地，对A相补偿电流在相电压参考系下的有功分量参考值和无功分量参考值进行交叉变换的公式分别为：Further, the formulas for cross-transforming the active component reference value and the reactive component reference value of the A-phase compensation current in the phase voltage reference frame are:

Figure 27149DEST_PATH_IMAGE199
Figure 27149DEST_PATH_IMAGE199

对B相补偿电流在相电压参考系下的有功分量参考值和无功分量参考值进行交叉变换的公式分别为：The formulas for the cross-transformation of the active component reference value and the reactive component reference value of the B-phase compensation current in the phase voltage reference frame are:

Figure 275728DEST_PATH_IMAGE200
Figure 275728DEST_PATH_IMAGE200

其中，

Figure 529991DEST_PATH_IMAGE201
表示A相补偿电流在线电压参考系下的有功分量参考值，
Figure 813205DEST_PATH_IMAGE202
表示A相补偿电流在线电压参考系下的无功分量参考值，
Figure 229143DEST_PATH_IMAGE203
表示B相补偿电流在线电压参考系下的有功分量参考值，
Figure 965018DEST_PATH_IMAGE204
表示B相补偿电流在线电压参考系下的无功分量参考值，
Figure 757393DEST_PATH_IMAGE170
表示A相补偿电流在相电压参考系下的有功分量参考值，
Figure 895114DEST_PATH_IMAGE171
表示A相补偿电流在相电压参考系下的无功分量参考值，
Figure 622898DEST_PATH_IMAGE172
表示B相补偿电流在相电压参考系下的有功分量参考值，
Figure 472168DEST_PATH_IMAGE173
表示B相补偿电流在相电压参考系下的无功分量参考值。in,
Figure 529991DEST_PATH_IMAGE201
Indicates the reference value of the active component of the A-phase compensation current in the on-line voltage reference frame,
Figure 813205DEST_PATH_IMAGE202
Represents the reference value of the reactive component of the A-phase compensation current in the on-line voltage reference system,
Figure 229143DEST_PATH_IMAGE203
Indicates the reference value of the active component of the B-phase compensation current in the on-line voltage reference frame,
Figure 965018DEST_PATH_IMAGE204
Represents the reference value of the reactive component of the B-phase compensation current in the on-line voltage reference frame,
Figure 757393DEST_PATH_IMAGE170
Indicates the reference value of the active component of the A-phase compensation current in the phase voltage reference frame,
Figure 895114DEST_PATH_IMAGE171
Represents the reference value of the reactive component of the A-phase compensation current in the phase voltage reference frame,
Figure 622898DEST_PATH_IMAGE172
Indicates the reference value of the active component of the B-phase compensation current in the phase voltage reference frame,
Figure 472168DEST_PATH_IMAGE173
Indicates the reference value of the reactive component of the B-phase compensation current in the phase voltage reference frame.

进一步地，步骤S5中， 对A相进行dq解耦控制的公式为：Further, in step S5, the formula for performing dq decoupling control on phase A is:

Figure 943600DEST_PATH_IMAGE205
Figure 943600DEST_PATH_IMAGE205

对B相进行dq解耦控制的公式为：The formula for dq decoupling control of phase B is:

Figure 326040DEST_PATH_IMAGE206
Figure 326040DEST_PATH_IMAGE206

其中，

Figure DEST_PATH_IMAGE208AAA
表示A相调制信号的有功分量，
Figure DEST_PATH_IMAGE210AAAA
表示B相调制信号的有功分量，
Figure DEST_PATH_IMAGE212AAA
表示A相调制信号的无功分量，
Figure DEST_PATH_IMAGE214AAA
表示B相调制信号的无功分量，
Figure DEST_PATH_IMAGE216AAA
表示电流环的第三控制参数，
Figure DEST_PATH_IMAGE218AAA
表示电流环的第四控制参数，
Figure DEST_PATH_IMAGE220AAA
表示A相网侧电压的有功分量，
Figure DEST_PATH_IMAGE222AAA
表示A相网侧电压的无功分量，S表示复频率，
Figure 991770DEST_PATH_IMAGE201
表示A相补偿电流在线电压参考系下的有功分量参考值，
Figure 702237DEST_PATH_IMAGE203
表示B相补偿电流在线电压参考系下的有功分量参考值，
Figure 836415DEST_PATH_IMAGE202
表示A相补偿电流在线电压参考系下的无功分量参考值，
Figure 948728DEST_PATH_IMAGE204
表示B相补偿电流在线电压参考系下的无功分量参考值，
Figure DEST_PATH_IMAGE224AAA
表示A相补偿电流的有功分量，
Figure DEST_PATH_IMAGE226AAA
表示B相补偿电流的有功分量，
Figure DEST_PATH_IMAGE228AAA
表示A相补偿电流的无功分量，
Figure DEST_PATH_IMAGE230AAA
表示B相补偿电流的无功分量，
Figure DEST_PATH_IMAGE232AAA
表示电网角频率，
Figure DEST_PATH_IMAGE234AAA
表示A相滤波电感，
Figure DEST_PATH_IMAGE236AAA
表示B相滤波电感。in,
Figure DEST_PATH_IMAGE208AAA
represents the active component of the A-phase modulated signal,
Figure DEST_PATH_IMAGE210AAAA
represents the active component of the B-phase modulated signal,
Figure DEST_PATH_IMAGE212AAA
Represents the reactive component of the A-phase modulated signal,
Figure DEST_PATH_IMAGE214AAA
Represents the reactive component of the B-phase modulated signal,
Figure DEST_PATH_IMAGE216AAA
represents the third control parameter of the current loop,
Figure DEST_PATH_IMAGE218AAA
represents the fourth control parameter of the current loop,
Figure DEST_PATH_IMAGE220AAA
Represents the active component of the A-phase grid-side voltage,
Figure DEST_PATH_IMAGE222AAA
Represents the reactive component of the A-phase grid-side voltage, S represents the complex frequency,
Figure 991770DEST_PATH_IMAGE201
Indicates the reference value of the active component of the A-phase compensation current in the on-line voltage reference frame,
Figure 702237DEST_PATH_IMAGE203
Indicates the reference value of the active component of the B-phase compensation current in the on-line voltage reference frame,
Figure 836415DEST_PATH_IMAGE202
Represents the reference value of the reactive component of the A-phase compensation current in the on-line voltage reference system,
Figure 948728DEST_PATH_IMAGE204
Represents the reference value of the reactive component of the B-phase compensation current in the on-line voltage reference frame,
Figure DEST_PATH_IMAGE224AAA
Represents the active component of the A-phase compensation current,
Figure DEST_PATH_IMAGE226AAA
represents the active component of the B-phase compensation current,
Figure DEST_PATH_IMAGE228AAA
Represents the reactive component of the A-phase compensation current,
Figure DEST_PATH_IMAGE230AAA
Represents the reactive component of the B-phase compensation current,
Figure DEST_PATH_IMAGE232AAA
represents the grid angular frequency,
Figure DEST_PATH_IMAGE234AAA
Indicates the A-phase filter inductance,
Figure DEST_PATH_IMAGE236AAA
Indicates the B-phase filter inductor.

进一步地，对A相调制信号的有功分量和无功分量进行旋转坐标逆变换的公式为：Further, the formula for inversely transforming the active and reactive components of the A-phase modulation signal is:

Figure DEST_PATH_IMAGE238AAA
Figure DEST_PATH_IMAGE238AAA

对B相调制信号的有功分量和无功分量进行旋转坐标逆变换的公式为：The formula for the inverse transformation of the rotation coordinates of the active and reactive components of the B-phase modulation signal is:

Figure DEST_PATH_IMAGE240AAA
Figure DEST_PATH_IMAGE240AAA

其中，

Figure 847676DEST_PATH_IMAGE241
表示A相开关管调制信号，
Figure DEST_PATH_IMAGE243AAAAA
表示B相开关管调制信号，
Figure DEST_PATH_IMAGE245AAAA
表示构造的滞后A相开关管调制信号的虚拟信号，
Figure DEST_PATH_IMAGE247AAAA
表示构造的滞后B相开关管调制信号的虚拟信号，
Figure DEST_PATH_IMAGE249AAAA
表示A相调制信号的有功分量，
Figure DEST_PATH_IMAGE251AAAA
表示B相调制信号的有功分量，
Figure DEST_PATH_IMAGE253AAAA
表示A相调制信号的无功分量，
Figure DEST_PATH_IMAGE255AAAA
表示B相调制信号的无功分量，
Figure DEST_PATH_IMAGE257AAAA
表示电网角频率，t表示时间，对半桥变换器调制信号的有功分量和无功分量进行旋转坐标逆变换的二阶变换矩阵为
Figure DEST_PATH_IMAGE259AAAA
矩阵。in,
Figure 847676DEST_PATH_IMAGE241
Indicates the modulation signal of the A-phase switch tube,
Figure DEST_PATH_IMAGE243AAAAA
Indicates the modulation signal of the B-phase switch tube,
Figure DEST_PATH_IMAGE245AAAA
represents the virtual signal of the constructed lag A-phase switch tube modulation signal,
Figure DEST_PATH_IMAGE247AAAA
represents the virtual signal of the constructed lag B-phase switch tube modulation signal,
Figure DEST_PATH_IMAGE249AAAA
represents the active component of the A-phase modulated signal,
Figure DEST_PATH_IMAGE251AAAA
represents the active component of the B-phase modulated signal,
Figure DEST_PATH_IMAGE253AAAA
Represents the reactive component of the A-phase modulated signal,
Figure DEST_PATH_IMAGE255AAAA
Represents the reactive component of the B-phase modulated signal,
Figure DEST_PATH_IMAGE257AAAA
Represents the grid angular frequency, t represents the time, and the second-order transformation matrix for inversely transforming the active and reactive components of the modulation signal of the half-bridge converter is:
Figure DEST_PATH_IMAGE259AAAA
matrix.

附图说明Description of drawings

图1为三相电能质量补偿装置的结构图；Fig. 1 is a structural diagram of a three-phase power quality compensation device;

图2为三相电能质量补偿方法的流程图；2 is a flowchart of a three-phase power quality compensation method;

图3为网侧电压波形和补偿前后的三相网侧电流波形图。Figure 3 shows the grid-side voltage waveform and the three-phase grid-side current waveform before and after compensation.

具体实施方式Detailed ways

下面结合附图对本发明的实施例作进一步的说明。The embodiments of the present invention will be further described below with reference to the accompanying drawings.

如图1所示，本发明提供了一种基于半桥变换器的三相电能质量补偿，包括电网

Figure DEST_PATH_IMAGE261AAAAA
、电网
Figure DEST_PATH_IMAGE263AAAAAA
、电网
Figure DEST_PATH_IMAGE265AAAAAA
、负载
Figure 106093DEST_PATH_IMAGE007
、负载
Figure 919328DEST_PATH_IMAGE008
、负载
Figure 246666DEST_PATH_IMAGE009
、滤波电感
Figure DEST_PATH_IMAGE267AAAAA
、滤波电感
Figure DEST_PATH_IMAGE269AAAAA
、电流传感器
Figure DEST_PATH_IMAGE015AAAAAA
、支撑电容
Figure DEST_PATH_IMAGE017AAAAAAAAA
、开关管
Figure DEST_PATH_IMAGE019AAAAAAAA
和反并联二极管
Figure DEST_PATH_IMAGE021AAAAAAAA
；As shown in FIG. 1, the present invention provides a three-phase power quality compensation based on a half-bridge converter, including a power grid
Figure DEST_PATH_IMAGE261AAAAA
, power grid
Figure DEST_PATH_IMAGE263AAAAAA
, power grid
Figure DEST_PATH_IMAGE265AAAAAA
,load
Figure 106093DEST_PATH_IMAGE007
,load
Figure 919328DEST_PATH_IMAGE008
,load
Figure 246666DEST_PATH_IMAGE009
, filter inductor
Figure DEST_PATH_IMAGE267AAAAA
, filter inductor
Figure DEST_PATH_IMAGE269AAAAA
,current sensor
Figure DEST_PATH_IMAGE015AAAAAA
, support capacitor
Figure DEST_PATH_IMAGE017AAAAAAAAA
,turning tube
Figure DEST_PATH_IMAGE019AAAAAAAA
and anti-parallel diodes
Figure DEST_PATH_IMAGE021AAAAAAAA
;

电网

Figure DEST_PATH_IMAGE261AAAAAA
的正极分别与滤波电感
Figure DEST_PATH_IMAGE267AAAAAA
的一端和电流传感器
Figure DEST_PATH_IMAGE271AAAA
的一端连接，其负极分别与电网
Figure DEST_PATH_IMAGE263AAAAAAA
的负极和电网
Figure DEST_PATH_IMAGE265AAAAAAA
的负极连接；电网
Figure DEST_PATH_IMAGE263AAAAAAAA
的正极分别与滤波电感
Figure DEST_PATH_IMAGE269AAAAAA
的一端和电流传感器
Figure DEST_PATH_IMAGE273AAAA
的一端连接；电网
Figure DEST_PATH_IMAGE265AAAAAAAA
的正极和电流传感器
Figure DEST_PATH_IMAGE275AAAA
的一端连接，其连接点还与支撑电容
Figure 926303DEST_PATH_IMAGE036
的一端和支撑电容
Figure 611362DEST_PATH_IMAGE037
的一端连接的连接点连接；电流传感器
Figure DEST_PATH_IMAGE277AAA
的另一端和负载
Figure 651124DEST_PATH_IMAGE007
的一端连接；电流传感器
Figure DEST_PATH_IMAGE279AAA
的另一端和负载
Figure 800346DEST_PATH_IMAGE008
的一端连接；电流传感器
Figure DEST_PATH_IMAGE281AAA
的另一端和负载
Figure 888433DEST_PATH_IMAGE009
的一端连接；负载
Figure 795209DEST_PATH_IMAGE007
的另一端分别与负载
Figure 74880DEST_PATH_IMAGE008
的另一端和负载
Figure 16292DEST_PATH_IMAGE009
的另一端连接；滤波电感
Figure DEST_PATH_IMAGE039AAAAAAAAAAAAAAAAA
的另一端和电流传感器
Figure DEST_PATH_IMAGE283AAAA
的一端连接；滤波电感
Figure DEST_PATH_IMAGE043AAAAAAAAAAAAAAAA
的另一端和电流传感器
Figure DEST_PATH_IMAGE285AAAA
的一端连接；电流传感器
Figure DEST_PATH_IMAGE283AAAAA
的另一端分别与开关管
Figure 411632DEST_PATH_IMAGE046
的发射极、反并联二极管
Figure DEST_PATH_IMAGE287AAAAA
的正极、开关管
Figure 494120DEST_PATH_IMAGE048
的集电极和反并联二极管
Figure DEST_PATH_IMAGE287AAAAAA
的负极连接；开关管
Figure 515165DEST_PATH_IMAGE046
的集电极分别与反并联二极管
Figure DEST_PATH_IMAGE287AAAAAAA
的负极、支撑电容
Figure 498034DEST_PATH_IMAGE036
的另一端、开关管
Figure 985647DEST_PATH_IMAGE051
的集电极和反并联二极管
Figure DEST_PATH_IMAGE289AAAA
的负极连接；电流传感器
Figure DEST_PATH_IMAGE285AAAAA
的另一端分别与开关管
Figure 758693DEST_PATH_IMAGE051
的发射极、反并联二极管
Figure DEST_PATH_IMAGE289AAAAA
的正极、开关管
Figure 442484DEST_PATH_IMAGE056
的集电极和反并联二极管
Figure DEST_PATH_IMAGE291AAA
的负极连接；开关管
Figure 922269DEST_PATH_IMAGE056
的发射极分别与反并联二极管
Figure DEST_PATH_IMAGE293AAA
的正极、支撑电容
Figure 174259DEST_PATH_IMAGE037
的另一端、开关管
Figure 401978DEST_PATH_IMAGE048
的发射极和反并联二极管
Figure DEST_PATH_IMAGE295AAA
的正极连接；grid
Figure DEST_PATH_IMAGE261AAAAAA
The positive poles are respectively connected with the filter inductor
Figure DEST_PATH_IMAGE267AAAAAA
one end and the current sensor
Figure DEST_PATH_IMAGE271AAAA
One end is connected to the grid, and its negative poles are respectively connected to the grid
Figure DEST_PATH_IMAGE263AAAAAAA
negative pole and grid
Figure DEST_PATH_IMAGE265AAAAAAA
negative connection; grid
Figure DEST_PATH_IMAGE263AAAAAAAA
The positive poles are respectively connected with the filter inductor
Figure DEST_PATH_IMAGE269AAAAAA
one end and the current sensor
Figure DEST_PATH_IMAGE273AAAA
one end of the connection; grid
Figure DEST_PATH_IMAGE265AAAAAAAA
positive and current sensors
Figure DEST_PATH_IMAGE275AAAA
one end of , and its connection point is also connected to the supporting capacitor
Figure 926303DEST_PATH_IMAGE036
one end and support capacitor
Figure 611362DEST_PATH_IMAGE037
one end of the connection point connection; current sensor
Figure DEST_PATH_IMAGE277AAA
the other end and the load
Figure 651124DEST_PATH_IMAGE007
one end of the connection; current sensor
Figure DEST_PATH_IMAGE279AAA
the other end and the load
Figure 800346DEST_PATH_IMAGE008
one end of the connection; current sensor
Figure DEST_PATH_IMAGE281AAA
the other end and the load
Figure 888433DEST_PATH_IMAGE009
one end of the connection; load
Figure 795209DEST_PATH_IMAGE007
the other end of the respectively and the load
Figure 74880DEST_PATH_IMAGE008
the other end and the load
Figure 16292DEST_PATH_IMAGE009
The other end of the connection; filter inductor
Figure DEST_PATH_IMAGE039AAAAAAAAAAAAAAAAA
the other end and the current sensor
Figure DEST_PATH_IMAGE283AAAA
one end of the connection; filter inductor
Figure DEST_PATH_IMAGE043AAAAAAAAAAAAAAAA
the other end and the current sensor
Figure DEST_PATH_IMAGE285AAAA
one end of the connection; current sensor
Figure DEST_PATH_IMAGE283AAAAA
The other end of , respectively, is connected with the switch tube
Figure 411632DEST_PATH_IMAGE046
emitter, anti-parallel diode
Figure DEST_PATH_IMAGE287AAAAA
positive pole, switch tube
Figure 494120DEST_PATH_IMAGE048
The collector and anti-parallel diodes
Figure DEST_PATH_IMAGE287AAAAAA
negative connection; switch tube
Figure 515165DEST_PATH_IMAGE046
The collectors are respectively connected with anti-parallel diodes
Figure DEST_PATH_IMAGE287AAAAAAA
negative electrode, supporting capacitor
Figure 498034DEST_PATH_IMAGE036
the other end of the switch tube
Figure 985647DEST_PATH_IMAGE051
The collector and anti-parallel diodes
Figure DEST_PATH_IMAGE289AAAA
negative connection of ; current sensor
Figure DEST_PATH_IMAGE285AAAAA
The other end of , respectively, is connected with the switch tube
Figure 758693DEST_PATH_IMAGE051
emitter, anti-parallel diode
Figure DEST_PATH_IMAGE289AAAAA
positive pole, switch tube
Figure 442484DEST_PATH_IMAGE056
The collector and anti-parallel diodes
Figure DEST_PATH_IMAGE291AAA
negative connection; switch tube
Figure 922269DEST_PATH_IMAGE056
The emitters are respectively connected with anti-parallel diodes
Figure DEST_PATH_IMAGE293AAA
positive electrode, support capacitor
Figure 174259DEST_PATH_IMAGE037
the other end of the switch tube
Figure 401978DEST_PATH_IMAGE048
The emitter and anti-parallel diode
Figure DEST_PATH_IMAGE295AAA
positive connection of ;

支撑电容

Figure DEST_PATH_IMAGE017AAAAAAAAAA
、开关管
Figure DEST_PATH_IMAGE019AAAAAAAAA
和反并联二极管
Figure DEST_PATH_IMAGE021AAAAAAAAA
组成半桥变换器；负载
Figure 453242DEST_PATH_IMAGE007
、负载
Figure 489331DEST_PATH_IMAGE008
和负载
Figure 708960DEST_PATH_IMAGE009
组成不平衡负载；Support capacitor
Figure DEST_PATH_IMAGE017AAAAAAAAAA
,turning tube
Figure DEST_PATH_IMAGE019AAAAAAAAA
and anti-parallel diodes
Figure DEST_PATH_IMAGE021AAAAAAAAA
Form a half-bridge converter; load
Figure 453242DEST_PATH_IMAGE007
,load
Figure 489331DEST_PATH_IMAGE008
and load
Figure 708960DEST_PATH_IMAGE009
form an unbalanced load;

电流传感器

Figure DEST_PATH_IMAGE064AAAAA
均用于测量负载电流，电流传感器
Figure DEST_PATH_IMAGE297AAA
和
Figure DEST_PATH_IMAGE299AAA
分别用于测量A相和B相的补偿电流。current sensor
Figure DEST_PATH_IMAGE064AAAAA
are used to measure load current, current sensor
Figure DEST_PATH_IMAGE297AAA
and
Figure DEST_PATH_IMAGE299AAA
It is used to measure the compensation current of A-phase and B-phase, respectively.

在本发明实施例中，如图1所示，

Figure 253336DEST_PATH_IMAGE300
点为电网
Figure DEST_PATH_IMAGE261AAAAAAA
的正极和电流传感器
Figure DEST_PATH_IMAGE271AAAAA
的连接点，且A相滤波电感
Figure DEST_PATH_IMAGE267AAAAAAA
输出端连接
Figure 45974DEST_PATH_IMAGE300
点；
Figure 795624DEST_PATH_IMAGE301
点为电网
Figure DEST_PATH_IMAGE263AAAAAAAAA
的正极和电流传感器
Figure DEST_PATH_IMAGE273AAAAA
的连接点，且B相滤波电感
Figure DEST_PATH_IMAGE269AAAAAAA
输出端连接
Figure 27233DEST_PATH_IMAGE301
点；
Figure 370490DEST_PATH_IMAGE302
点为电网
Figure DEST_PATH_IMAGE265AAAAAAAAA
的正极和电流传感器
Figure DEST_PATH_IMAGE275AAAAA
的连接点，且直流侧上下支撑电容
Figure DEST_PATH_IMAGE017AAAAAAAAAAA
的中点连接
Figure 825873DEST_PATH_IMAGE302
点。In the embodiment of the present invention, as shown in FIG. 1 ,
Figure 253336DEST_PATH_IMAGE300
point for grid
Figure DEST_PATH_IMAGE261AAAAAAA
positive and current sensors
Figure DEST_PATH_IMAGE271AAAAA
connection point, and the A-phase filter inductor
Figure DEST_PATH_IMAGE267AAAAAAA
output connection
Figure 45974DEST_PATH_IMAGE300
point;
Figure 795624DEST_PATH_IMAGE301
point for grid
Figure DEST_PATH_IMAGE263AAAAAAAAA
positive and current sensors
Figure DEST_PATH_IMAGE273AAAAA
connection point, and the B-phase filter inductor
Figure DEST_PATH_IMAGE269AAAAAAA
output connection
Figure 27233DEST_PATH_IMAGE301
point;
Figure 370490DEST_PATH_IMAGE302
point for grid
Figure DEST_PATH_IMAGE265AAAAAAAAA
positive and current sensors
Figure DEST_PATH_IMAGE275AAAAA
connection point, and the DC side supports capacitors up and down
Figure DEST_PATH_IMAGE017AAAAAAAAAAA
the midpoint connection of
Figure 825873DEST_PATH_IMAGE302
point.

基于以上系统，本发明还提出一种基于半桥变换器的三相电能质量补偿方法，如图2所示，包括以下步骤：Based on the above system, the present invention also proposes a three-phase power quality compensation method based on a half-bridge converter, as shown in FIG. 2 , including the following steps:

S1：利用锁相环对网侧电压的相位进行锁定，并获取三相网侧电压的相位；S1: Use the phase-locked loop to lock the phase of the grid-side voltage, and obtain the phase of the three-phase grid-side voltage;

S2：根据三相网侧电压的相位，对A相网侧电压、三相负载电流和补偿电流进行旋转坐标转换，得到A相网侧电压的有功分量和无功分量、三相负载电流的有功分量和无功分量与补偿电流的有功分量和无功分量；S2: According to the phase of the three-phase grid-side voltage, perform rotational coordinate transformation on the A-phase grid-side voltage, three-phase load current and compensation current to obtain the active and reactive components of the A-phase grid-side voltage, and the active power of the three-phase load current. Component and reactive component and active component and reactive component of compensation current;

S3：将三相负载电流的有功分量和无功分量、补偿电流的有功分量和无功分量与维持直流电压稳定的有功电流进行

Figure DEST_PATH_IMAGE304AAA
变换，得到补偿电流在相电压参考系下的有功分量参考值和无功分量参考值；S3: Compare the active and reactive components of the three-phase load current, the active and reactive components of the compensation current, and the active current that maintains DC voltage stability.
Figure DEST_PATH_IMAGE304AAA
Transform to obtain the reference value of active component and reference value of reactive component of the compensation current in the phase voltage reference frame;

S4：将补偿电流在相电压参考系下的有功分量参考值和无功分量参考值进行交叉变换，得到补偿电流在线电压参考系下的有功分量参考值和无功分量参考值；S4: Cross-transform the active component reference value and reactive component reference value of the compensation current in the phase voltage reference system to obtain the active component reference value and reactive component reference value of the compensation current in the on-line voltage reference system;

S5：根据A相网侧电压的有功分量和无功分量，将补偿电流的有功分量和无功分量与补偿电流在线电压参考系下的有功分量参考值和无功分量参考值进行dq解耦控制，得到半桥变换器调制信号的有功分量和无功分量；S5: According to the active and reactive components of the A-phase grid-side voltage, perform dq decoupling control on the active and reactive components of the compensation current and the reference values of the active components and reactive components of the compensation current in the on-line voltage reference system , obtain the active and reactive components of the half-bridge converter modulation signal;

S6：将半桥变换器调制信号的有功分量和无功分量进行旋转坐标逆变换，得到半桥变换器的调制信号；S6: Inversely transform the rotation coordinates of the active component and the reactive component of the modulation signal of the half-bridge converter to obtain the modulation signal of the half-bridge converter;

S7：将半桥变换器的调制信号进行PWM调制，得到半桥变换器开关管的驱动信号，完成基于半桥变换器的三相电能质量补偿。S7: PWM modulation is performed on the modulation signal of the half-bridge converter to obtain the driving signal of the switching tube of the half-bridge converter, and the three-phase power quality compensation based on the half-bridge converter is completed.

在本发明实施例中，如图2所示，步骤S2中，对A相网侧电压进行旋转坐标转换的公式为：In the embodiment of the present invention, as shown in FIG. 2 , in step S2, the formula for performing the rotational coordinate conversion on the voltage on the A-phase grid side is:

Figure DEST_PATH_IMAGE075AAAA
Figure DEST_PATH_IMAGE075AAAA

对A相负载电流和补偿电流进行旋转坐标转换的公式分别为：The formulas for the rotation coordinate transformation of the A-phase load current and compensation current are:

Figure DEST_PATH_IMAGE077AAAA
Figure DEST_PATH_IMAGE077AAAA

其中，

Figure DEST_PATH_IMAGE079AAAA
表示A相网侧电压的有功分量，
Figure DEST_PATH_IMAGE081AAAA
表示A相网侧电压的无功分量，对A相网侧电压进行旋转坐标转换的二阶变换矩阵为P矩阵，
Figure DEST_PATH_IMAGE023AAAAAAAA
表示A相网侧电压，
Figure DEST_PATH_IMAGE083AAAA
表示相位滞后于A相网侧电压的虚拟电压，
Figure DEST_PATH_IMAGE085AAAA
表示A相负载电流的有功分量，
Figure DEST_PATH_IMAGE087AAAA
表示A相负载电流的无功分量，
Figure DEST_PATH_IMAGE089AAAA
表示A相补偿电流的有功分量，
Figure DEST_PATH_IMAGE091AAAA
表示A相补偿电流的无功分量，
Figure DEST_PATH_IMAGE093AAAA
表示A相负载电流，
Figure DEST_PATH_IMAGE095AAAA
表示相位滞后于A相负载交流的虚拟电流，
Figure DEST_PATH_IMAGE097AAAA
表示A相补偿电流，
Figure DEST_PATH_IMAGE099AAAAAA
表示相位滞后于A相补偿电流的虚拟电流，
Figure DEST_PATH_IMAGE101AAAA
表示电网角频率，t表示时间；in,
Figure DEST_PATH_IMAGE079AAAA
Represents the active component of the A-phase grid-side voltage,
Figure DEST_PATH_IMAGE081AAAA
Represents the reactive component of the A-phase grid-side voltage, and the second-order transformation matrix for the rotational coordinate transformation of the A-phase grid-side voltage is the P matrix,
Figure DEST_PATH_IMAGE023AAAAAAAA
Indicates the A-phase grid side voltage,
Figure DEST_PATH_IMAGE083AAAA
represents the virtual voltage whose phase lags behind the A-phase grid-side voltage,
Figure DEST_PATH_IMAGE085AAAA
represents the active component of the A-phase load current,
Figure DEST_PATH_IMAGE087AAAA
Represents the reactive component of the A-phase load current,
Figure DEST_PATH_IMAGE089AAAA
Represents the active component of the A-phase compensation current,
Figure DEST_PATH_IMAGE091AAAA
Represents the reactive component of the A-phase compensation current,
Figure DEST_PATH_IMAGE093AAAA
represents the phase A load current,
Figure DEST_PATH_IMAGE095AAAA
represents the virtual current whose phase lags behind the A-phase load AC,
Figure DEST_PATH_IMAGE097AAAA
Indicates the A-phase compensation current,
Figure DEST_PATH_IMAGE099AAAAAA
represents the virtual current whose phase lags behind the A-phase compensation current,
Figure DEST_PATH_IMAGE101AAAA
represents the grid angular frequency, and t represents the time;

对B相负载电流和补偿电流进行旋转坐标转换的公式分别为：The formulas for the rotation coordinate transformation of the B-phase load current and compensation current are:

Figure DEST_PATH_IMAGE103AAAA
Figure DEST_PATH_IMAGE103AAAA

其中，

Figure DEST_PATH_IMAGE105AAAAAAA
表示B相负载电流的有功分量，
Figure DEST_PATH_IMAGE107AAAA
表示B相负载电流的无功分量，
Figure DEST_PATH_IMAGE109AAAA
表示B相补偿电流的有功分量，
Figure DEST_PATH_IMAGE111AAAA
表示B相补偿电流的无功分量，
Figure DEST_PATH_IMAGE113AAAA
表示B相负载电流，
Figure DEST_PATH_IMAGE115AAAA
表示相位滞后于B相负载交流的虚拟电流，
Figure DEST_PATH_IMAGE117AAAA
表示B相补偿电流，
Figure DEST_PATH_IMAGE119AAAA
表示相位滞后于B相补偿电流的虚拟电流；in,
Figure DEST_PATH_IMAGE105AAAAAAA
represents the active component of the B-phase load current,
Figure DEST_PATH_IMAGE107AAAA
represents the reactive component of the B-phase load current,
Figure DEST_PATH_IMAGE109AAAA
represents the active component of the B-phase compensation current,
Figure DEST_PATH_IMAGE111AAAA
Represents the reactive component of the B-phase compensation current,
Figure DEST_PATH_IMAGE113AAAA
represents the B-phase load current,
Figure DEST_PATH_IMAGE115AAAA
represents the virtual current that the phase lags behind the B-phase load AC,
Figure DEST_PATH_IMAGE117AAAA
represents the B-phase compensation current,
Figure DEST_PATH_IMAGE119AAAA
Indicates the virtual current whose phase lags behind the B-phase compensation current;

对C相负载电流和补偿电流进行旋转坐标转换的公式分别为：The formulas for the rotation coordinate transformation of the C-phase load current and compensation current are:

Figure DEST_PATH_IMAGE121AAAA
Figure DEST_PATH_IMAGE121AAAA

其中，

Figure DEST_PATH_IMAGE123AAAAAAA
表示C相负载电流的有功分量，
Figure DEST_PATH_IMAGE125AAAA
表示C相负载电流的无功分量，
Figure DEST_PATH_IMAGE127AAAA
表示C相补偿电流的有功分量，
Figure DEST_PATH_IMAGE129AAAA
表示C相补偿电流的无功分量，
Figure DEST_PATH_IMAGE131AAAA
表示C相负载电流，
Figure DEST_PATH_IMAGE123AAAAAAAA
表示相位滞后于C相负载交流的虚拟电流，
Figure DEST_PATH_IMAGE133AAAA
表示C相补偿电流，
Figure DEST_PATH_IMAGE135AAAA
表示相位滞后于C相补偿电流的虚拟电流。in,
Figure DEST_PATH_IMAGE123AAAAAAA
represents the active component of the C-phase load current,
Figure DEST_PATH_IMAGE125AAAA
represents the reactive component of the C-phase load current,
Figure DEST_PATH_IMAGE127AAAA
represents the active component of the C-phase compensation current,
Figure DEST_PATH_IMAGE129AAAA
Represents the reactive component of the C-phase compensation current,
Figure DEST_PATH_IMAGE131AAAA
represents the C-phase load current,
Figure DEST_PATH_IMAGE123AAAAAAAA
represents the virtual current whose phase lags behind the C-phase load AC,
Figure DEST_PATH_IMAGE133AAAA
Indicates the C-phase compensation current,
Figure DEST_PATH_IMAGE135AAAA
Indicates a virtual current whose phase lags behind the C-phase compensation current.

在本发明实施例中，如图2所示，步骤S2中，三相网侧电流的有功分量和无功分量满足的表达式为：In the embodiment of the present invention, as shown in FIG. 2 , in step S2, the expressions satisfied by the active and reactive components of the three-phase grid-side current are:

Figure 581428DEST_PATH_IMAGE136
Figure 581428DEST_PATH_IMAGE136

其中，

Figure 283805DEST_PATH_IMAGE137
表示A相网侧电流有功分量的参考值，
Figure 848778DEST_PATH_IMAGE138
表示B相网侧电流有功分量的参考值，
Figure 153857DEST_PATH_IMAGE139
表示C相网侧电流有功分量的参考值，
Figure 753466DEST_PATH_IMAGE140
表示A相网侧电流无功分量的参考值，
Figure 220219DEST_PATH_IMAGE141
表示B相网侧电流无功分量的参考值，
Figure 538068DEST_PATH_IMAGE142
表示C相网侧电流无功分量的参考值，
Figure DEST_PATH_IMAGE144AAAAAA
表示A相负载电流的有功分量，
Figure DEST_PATH_IMAGE146AAAAAA
表示B相负载电流的有功分量，
Figure DEST_PATH_IMAGE148AAAAAA
表示C相负载电流的有功分量。in,
Figure 283805DEST_PATH_IMAGE137
Represents the reference value of the active component of the A-phase grid side current,
Figure 848778DEST_PATH_IMAGE138
Indicates the reference value of the active component of the B-phase grid-side current,
Figure 153857DEST_PATH_IMAGE139
Indicates the reference value of the active component of the C-phase grid side current,
Figure 753466DEST_PATH_IMAGE140
Represents the reference value of the reactive component of the A-phase grid side current,
Figure 220219DEST_PATH_IMAGE141
Represents the reference value of the reactive component of the B-phase grid side current,
Figure 538068DEST_PATH_IMAGE142
Represents the reference value of the reactive component of the C-phase grid side current,
Figure DEST_PATH_IMAGE144AAAAAA
represents the active component of the A-phase load current,
Figure DEST_PATH_IMAGE146AAAAAA
represents the active component of the B-phase load current,
Figure DEST_PATH_IMAGE148AAAAAA
Indicates the active component of the C-phase load current.

在本发明中，三相有功平衡和无功为零时，网侧电流有功分量和无功分量满足上述表达式。In the present invention, when the three-phase active power is balanced and the reactive power is zero, the active and reactive power components of the grid-side current satisfy the above expressions.

在本发明实施例中，如图2所示，步骤S3包括以下子步骤：In this embodiment of the present invention, as shown in FIG. 2 , step S3 includes the following sub-steps:

S31：将直流侧电容电压的闭环输出注入至补偿电流中，得到维持直流电压稳定的有功电流

Figure 476200DEST_PATH_IMAGE305
；S31: Inject the closed-loop output of the DC side capacitor voltage into the compensation current to obtain an active current that maintains a stable DC voltage
Figure 476200DEST_PATH_IMAGE305
;

S32：对三相负载电流的有功分量和无功分量、补偿电流的有功分量和无功分量与维持直流电压稳定的有功电流

Figure DEST_PATH_IMAGE307A
进行
Figure DEST_PATH_IMAGE309A
变换，得到补偿电流在相电压参考系下的有功分量参考值和无功分量参考值。S32: For the active and reactive components of the three-phase load current, the active and reactive components of the compensation current, and the active current for maintaining the stability of the DC voltage
Figure DEST_PATH_IMAGE307A
conduct
Figure DEST_PATH_IMAGE309A
Transform to obtain the reference value of the active component and the reference value of the reactive component of the compensation current in the phase voltage reference frame.

在本发明实施例中，如图2所示，步骤S31中，维持直流电压稳定的有功电流

Figure DEST_PATH_IMAGE311A
的计算公式为：In the embodiment of the present invention, as shown in FIG. 2 , in step S31, the active current of the stable DC voltage is maintained
Figure DEST_PATH_IMAGE311A
The calculation formula is:

Figure 743364DEST_PATH_IMAGE153
Figure 743364DEST_PATH_IMAGE153

其中，S表示复频率，

Figure DEST_PATH_IMAGE313A
表示电压环的第一控制参数，
Figure DEST_PATH_IMAGE315A
表示电压环的第二控制参数，
Figure 413642DEST_PATH_IMAGE158
表示直流侧电压的参考值，
Figure DEST_PATH_IMAGE317A
表示直流侧电压。where S is the complex frequency,
Figure DEST_PATH_IMAGE313A
represents the first control parameter of the voltage loop,
Figure DEST_PATH_IMAGE315A
represents the second control parameter of the voltage loop,
Figure 413642DEST_PATH_IMAGE158
Indicates the reference value of the DC side voltage,
Figure DEST_PATH_IMAGE317A
Indicates the DC side voltage.

在本发明中，为了维持直流侧电容电压的稳定，需要将直流侧电容电压的闭环输出作为动态调整的有功电流，注入到补偿电流中，得到电压环的表达式。In the present invention, in order to maintain the stability of the DC side capacitor voltage, the closed-loop output of the DC side capacitor voltage needs to be injected into the compensation current as a dynamically adjusted active current to obtain the expression of the voltage loop.

在本发明实施例中，如图2所示，步骤S32中，对A相负载电流的有功分量和无功分量、补偿电流的有功分量和无功分量与维持直流电压稳定的有功电流

Figure DEST_PATH_IMAGE162AAAAAA
进行
Figure DEST_PATH_IMAGE164AAAAAAAA
变换的公式分别为：In the embodiment of the present invention, as shown in FIG. 2 , in step S32, the active and reactive components of the A-phase load current, the active and reactive components of the compensation current, and the active current for maintaining the DC voltage stability are compared.
Figure DEST_PATH_IMAGE162AAAAAA
conduct
Figure DEST_PATH_IMAGE164AAAAAAAA
The transformation formulas are:

Figure 140158DEST_PATH_IMAGE165
Figure 140158DEST_PATH_IMAGE165

Figure 554085DEST_PATH_IMAGE166
；
Figure 554085DEST_PATH_IMAGE166
;

对B相负载电流的有功分量和无功分量、补偿电流的有功分量和无功分量与维持直流电压稳定的有功电流

Figure DEST_PATH_IMAGE168AAAA
进行
Figure DEST_PATH_IMAGE164AAAAAAAAA
变换的公式分别为：For the active and reactive components of the B-phase load current, the active and reactive components of the compensation current, and the active current for maintaining the stability of the DC voltage
Figure DEST_PATH_IMAGE168AAAA
conduct
Figure DEST_PATH_IMAGE164AAAAAAAAA
The transformation formulas are:

Figure 252919DEST_PATH_IMAGE169
Figure 252919DEST_PATH_IMAGE169

其中，

Figure 202421DEST_PATH_IMAGE170
表示A相补偿电流在相电压参考系下的有功分量参考值，
Figure 353916DEST_PATH_IMAGE171
表示A相补偿电流在相电压参考系下的无功分量参考值，
Figure 414276DEST_PATH_IMAGE172
表示B相补偿电流在相电压参考系下的有功分量参考值，
Figure 203503DEST_PATH_IMAGE173
表示B相补偿电流在相电压参考系下的无功分量参考值，
Figure DEST_PATH_IMAGE175AAAAA
表示A相负载电流的有功分量，
Figure DEST_PATH_IMAGE177AAAAAA
表示B相负载电流的有功分量，
Figure DEST_PATH_IMAGE179AAAAAAAA
表示C相负载电流的有功分量，
Figure DEST_PATH_IMAGE181AAAAAA
表示A相负载电流的无功分量，
Figure DEST_PATH_IMAGE183AAAAAA
表示B相负载电流的无功分量；in,
Figure 202421DEST_PATH_IMAGE170
Indicates the reference value of the active component of the A-phase compensation current in the phase voltage reference frame,
Figure 353916DEST_PATH_IMAGE171
Represents the reference value of the reactive component of the A-phase compensation current in the phase voltage reference frame,
Figure 414276DEST_PATH_IMAGE172
Indicates the reference value of the active component of the B-phase compensation current in the phase voltage reference frame,
Figure 203503DEST_PATH_IMAGE173
Represents the reference value of the reactive component of the B-phase compensation current in the phase voltage reference frame,
Figure DEST_PATH_IMAGE175AAAAA
represents the active component of the A-phase load current,
Figure DEST_PATH_IMAGE177AAAAAA
represents the active component of the B-phase load current,
Figure DEST_PATH_IMAGE179AAAAAAAA
represents the active component of the C-phase load current,
Figure DEST_PATH_IMAGE181AAAAAA
Represents the reactive component of the A-phase load current,
Figure DEST_PATH_IMAGE183AAAAAA
Represents the reactive component of the B-phase load current;

步骤S32中，根据基尔霍夫电流定律，网侧电流有功分量参考值和无功分量参考值、负载电流的有功分量和无功分量以及补偿电流在相电压参考系下有功分量参考值和无功分量参考值满足的表达式为：In step S32, according to Kirchhoff's current law, the reference value of the active component and the reference value of the reactive component of the grid-side current, the active component and the reactive component of the load current, and the reference value of the active component of the compensation current in the phase voltage reference frame and no The expression satisfied by the reference value of the work component is:

Figure 273307DEST_PATH_IMAGE184
Figure 273307DEST_PATH_IMAGE184

其中，

Figure 787465DEST_PATH_IMAGE137
表示A相网侧电流有功分量的参考值，
Figure 510571DEST_PATH_IMAGE138
表示B相网侧电流有功分量的参考值，
Figure 59364DEST_PATH_IMAGE139
表示C相网侧电流有功分量的参考值，
Figure 350668DEST_PATH_IMAGE140
表示A相网侧电流无功分量的参考值，
Figure 712641DEST_PATH_IMAGE141
表示B相网侧电流无功分量的参考值，
Figure 380383DEST_PATH_IMAGE142
表示C相网侧电流无功分量的参考值，
Figure DEST_PATH_IMAGE186AAAA
表示A相负载电流的有功分量，
Figure DEST_PATH_IMAGE188AAAA
表示B相负载电流的有功分量，
Figure DEST_PATH_IMAGE190AAAA
表示C相负载电流的有功分量，
Figure DEST_PATH_IMAGE192AAAA
表示A相负载电流的无功分量，
Figure DEST_PATH_IMAGE194AAAA
表示B相负载电流的无功分量，
Figure DEST_PATH_IMAGE196AAAA
表示C相负载电流的无功分量，
Figure 924628DEST_PATH_IMAGE197
表示C相补偿电流在相电压参考系下的有功分量参考值，
Figure 511467DEST_PATH_IMAGE198
表示C相补偿电流在相电压参考系下的无功分量参考值。in,
Figure 787465DEST_PATH_IMAGE137
Represents the reference value of the active component of the A-phase grid side current,
Figure 510571DEST_PATH_IMAGE138
Indicates the reference value of the active component of the B-phase grid-side current,
Figure 59364DEST_PATH_IMAGE139
Indicates the reference value of the active component of the C-phase grid side current,
Figure 350668DEST_PATH_IMAGE140
Represents the reference value of the reactive component of the A-phase grid side current,
Figure 712641DEST_PATH_IMAGE141
Represents the reference value of the reactive power component of the B-phase grid side current,
Figure 380383DEST_PATH_IMAGE142
Represents the reference value of the reactive component of the C-phase grid side current,
Figure DEST_PATH_IMAGE186AAAA
represents the active component of the A-phase load current,
Figure DEST_PATH_IMAGE188AAAA
represents the active component of the B-phase load current,
Figure DEST_PATH_IMAGE190AAAA
represents the active component of the C-phase load current,
Figure DEST_PATH_IMAGE192AAAA
Represents the reactive component of the A-phase load current,
Figure DEST_PATH_IMAGE194AAAA
represents the reactive component of the B-phase load current,
Figure DEST_PATH_IMAGE196AAAA
represents the reactive component of the C-phase load current,
Figure 924628DEST_PATH_IMAGE197
Represents the reference value of the active component of the C-phase compensation current in the phase voltage reference frame,
Figure 511467DEST_PATH_IMAGE198
Indicates the reference value of the reactive component of the C-phase compensation current in the phase voltage reference frame.

在本发明中，根据基尔霍夫电流定律和三相平衡及无功为零的条件进行

Figure DEST_PATH_IMAGE319AA
变换。三相三线制电路中，C相补偿电流为A相补偿电流与B相补偿电流之和的相反数，因此仅需控制A相和B相补偿电流。当A相和B相补偿电流满足步骤S32中的公式时，三相网侧电流将处于平衡状态，功率因数为1。将补偿电流在相电压参考系下有功和无功分量的参考值与负载电流的有功和无功分量以及维持直流电压稳定的有功电流之间的关系表示成一个四行六列的矩阵乘法运算，将该运算称为
Figure DEST_PATH_IMAGE319AAA
变换，其表达式为：In the present invention, according to Kirchhoff's current law and three-phase balance and the conditions of zero reactive power
Figure DEST_PATH_IMAGE319AA
transform. In the three-phase three-wire circuit, the C-phase compensation current is the inverse of the sum of the A-phase compensation current and the B-phase compensation current, so it is only necessary to control the A-phase and B-phase compensation currents. When the A-phase and B-phase compensation currents satisfy the formula in step S32, the three-phase grid-side currents will be in a balanced state, and the power factor will be 1. The relationship between the reference value of the active and reactive components of the compensation current in the phase voltage reference frame, the active and reactive components of the load current, and the active current for maintaining the stability of the DC voltage is expressed as a matrix multiplication operation with four rows and six columns, call the operation
Figure DEST_PATH_IMAGE319AAA
transformation, its expression is:

Figure 360737DEST_PATH_IMAGE320
。
Figure 360737DEST_PATH_IMAGE320
.

在本发明实施例中，如图2所示，步骤S4中，对A相补偿电流在相电压参考系下的有功分量参考值和无功分量参考值进行交叉变换的公式分别为：In the embodiment of the present invention, as shown in FIG. 2, in step S4, the formulas for cross-transforming the reference value of the active component and the reference value of the reactive component of the A-phase compensation current in the phase voltage reference frame are respectively:

Figure 956803DEST_PATH_IMAGE199
Figure 956803DEST_PATH_IMAGE199

对B相补偿电流在相电压参考系下的有功分量参考值和无功分量参考值进行交叉变换的公式分别为：The formulas for the cross-transformation of the active component reference value and the reactive component reference value of the B-phase compensation current in the phase voltage reference frame are:

Figure 949030DEST_PATH_IMAGE200
Figure 949030DEST_PATH_IMAGE200

其中，

Figure 972350DEST_PATH_IMAGE201
表示A相补偿电流在线电压参考系下的有功分量参考值，
Figure 682817DEST_PATH_IMAGE202
表示A相补偿电流在线电压参考系下的无功分量参考值，
Figure 692361DEST_PATH_IMAGE203
表示B相补偿电流在线电压参考系下的有功分量参考值，
Figure 430772DEST_PATH_IMAGE204
表示B相补偿电流在线电压参考系下的无功分量参考值，
Figure 234780DEST_PATH_IMAGE170
表示A相补偿电流在相电压参考系下的有功分量参考值，
Figure 557177DEST_PATH_IMAGE171
表示A相补偿电流在相电压参考系下的无功分量参考值，
Figure 370412DEST_PATH_IMAGE172
表示B相补偿电流在相电压参考系下的有功分量参考值，
Figure 461865DEST_PATH_IMAGE173
表示B相补偿电流在相电压参考系下的无功分量参考值。in,
Figure 972350DEST_PATH_IMAGE201
Indicates the reference value of the active component of the A-phase compensation current in the on-line voltage reference frame,
Figure 682817DEST_PATH_IMAGE202
Represents the reference value of the reactive component of the A-phase compensation current in the on-line voltage reference system,
Figure 692361DEST_PATH_IMAGE203
Indicates the reference value of the active component of the B-phase compensation current in the on-line voltage reference frame,
Figure 430772DEST_PATH_IMAGE204
Represents the reference value of the reactive component of the B-phase compensation current in the on-line voltage reference frame,
Figure 234780DEST_PATH_IMAGE170
Indicates the reference value of the active component of the A-phase compensation current in the phase voltage reference frame,
Figure 557177DEST_PATH_IMAGE171
Represents the reference value of the reactive component of the A-phase compensation current in the phase voltage reference frame,
Figure 370412DEST_PATH_IMAGE172
Indicates the reference value of the active component of the B-phase compensation current in the phase voltage reference frame,
Figure 461865DEST_PATH_IMAGE173
Indicates the reference value of the reactive component of the B-phase compensation current in the phase voltage reference frame.

在本发明中，由于变换器接入的是网侧线电压，而补偿电流是注入到网侧相电流中，相线之间存在30度相角差，因此需要进行角度转换。补偿电流在线电压参考系下的有功分量参考值和无功分量参考值也是控制系统中实际的补偿电流参考值。In the present invention, since the converter is connected to the grid-side line voltage, and the compensation current is injected into the grid-side phase current, there is a 30-degree phase angle difference between the phase lines, so angle conversion is required. The active component reference value and reactive component reference value of the compensation current in the on-line voltage reference system are also the actual compensation current reference value in the control system.

在本发明实施例中，如图2所示，步骤S5中， 对A相进行dq解耦控制的公式为：In the embodiment of the present invention, as shown in FIG. 2, in step S5, the formula for performing dq decoupling control on phase A is:

Figure 702353DEST_PATH_IMAGE205
Figure 702353DEST_PATH_IMAGE205

对B相进行dq解耦控制的公式为：The formula for dq decoupling control of phase B is:

Figure DEST_PATH_IMAGE321
Figure DEST_PATH_IMAGE321

其中，

Figure DEST_PATH_IMAGE208AAAA
表示A相调制信号的有功分量，
Figure DEST_PATH_IMAGE210AAAAA
表示B相调制信号的有功分量，
Figure DEST_PATH_IMAGE212AAAA
表示A相调制信号的无功分量，
Figure DEST_PATH_IMAGE214AAAA
表示B相调制信号的无功分量，
Figure DEST_PATH_IMAGE216AAAA
表示电流环的第三控制参数，
Figure DEST_PATH_IMAGE218AAAA
表示电流环的第四控制参数，
Figure DEST_PATH_IMAGE220AAAA
表示A相网侧电压的有功分量，
Figure DEST_PATH_IMAGE222AAAA
表示A相网侧电压的无功分量，S表示复频率，
Figure 888877DEST_PATH_IMAGE201
表示A相补偿电流在线电压参考系下的有功分量参考值，
Figure 364858DEST_PATH_IMAGE203
表示B相补偿电流在线电压参考系下的有功分量参考值，
Figure 186184DEST_PATH_IMAGE202
表示A相补偿电流在线电压参考系下的无功分量参考值，
Figure 223672DEST_PATH_IMAGE204
表示B相补偿电流在线电压参考系下的无功分量参考值，
Figure DEST_PATH_IMAGE224AAAA
表示A相补偿电流的有功分量，
Figure DEST_PATH_IMAGE226AAAA
表示B相补偿电流的有功分量，
Figure DEST_PATH_IMAGE228AAAA
表示A相补偿电流的无功分量，
Figure DEST_PATH_IMAGE230AAAA
表示B相补偿电流的无功分量，
Figure DEST_PATH_IMAGE232AAAA
表示电网角频率，
Figure DEST_PATH_IMAGE234AAAA
表示A相滤波电感，
Figure DEST_PATH_IMAGE236AAAA
表示B相滤波电感。in,
Figure DEST_PATH_IMAGE208AAAA
represents the active component of the A-phase modulated signal,
Figure DEST_PATH_IMAGE210AAAAA
represents the active component of the B-phase modulated signal,
Figure DEST_PATH_IMAGE212AAAA
Represents the reactive component of the A-phase modulated signal,
Figure DEST_PATH_IMAGE214AAAA
Represents the reactive component of the B-phase modulated signal,
Figure DEST_PATH_IMAGE216AAAA
represents the third control parameter of the current loop,
Figure DEST_PATH_IMAGE218AAAA
represents the fourth control parameter of the current loop,
Figure DEST_PATH_IMAGE220AAAA
Represents the active component of the A-phase grid-side voltage,
Figure DEST_PATH_IMAGE222AAAA
Represents the reactive component of the A-phase grid-side voltage, S represents the complex frequency,
Figure 888877DEST_PATH_IMAGE201
Indicates the reference value of the active component of the A-phase compensation current in the on-line voltage reference frame,
Figure 364858DEST_PATH_IMAGE203
Indicates the reference value of the active component of the B-phase compensation current in the on-line voltage reference frame,
Figure 186184DEST_PATH_IMAGE202
Represents the reference value of the reactive component of the A-phase compensation current in the on-line voltage reference frame,
Figure 223672DEST_PATH_IMAGE204
Represents the reference value of the reactive component of the B-phase compensation current in the on-line voltage reference frame,
Figure DEST_PATH_IMAGE224AAAA
Represents the active component of the A-phase compensation current,
Figure DEST_PATH_IMAGE226AAAA
represents the active component of the B-phase compensation current,
Figure DEST_PATH_IMAGE228AAAA
Represents the reactive component of the A-phase compensation current,
Figure DEST_PATH_IMAGE230AAAA
Represents the reactive component of the B-phase compensation current,
Figure DEST_PATH_IMAGE232AAAA
represents the grid angular frequency,
Figure DEST_PATH_IMAGE234AAAA
Indicates the A-phase filter inductance,
Figure DEST_PATH_IMAGE236AAAA
Indicates the B-phase filter inductor.

在本发明实施例中，如图2所示，步骤S6中，对A相调制信号的有功分量和无功分量进行旋转坐标逆变换的公式为：In the embodiment of the present invention, as shown in FIG. 2 , in step S6, the formula for performing the inverse rotation coordinate transformation on the active component and the reactive component of the A-phase modulation signal is:

Figure DEST_PATH_IMAGE238AAAA
Figure DEST_PATH_IMAGE238AAAA

对B相调制信号的有功分量和无功分量进行旋转坐标逆变换的公式为：The formula for the inverse transformation of the rotation coordinates of the active and reactive components of the B-phase modulation signal is:

Figure DEST_PATH_IMAGE240AAAA
Figure DEST_PATH_IMAGE240AAAA

其中，

Figure 948090DEST_PATH_IMAGE241
表示A相开关管调制信号，
Figure DEST_PATH_IMAGE243AAAAAA
表示B相开关管调制信号，
Figure DEST_PATH_IMAGE245AAAAA
表示构造的滞后A相开关管调制信号的虚拟信号，
Figure DEST_PATH_IMAGE247AAAAA
表示构造的滞后B相开关管调制信号的虚拟信号，
Figure DEST_PATH_IMAGE249AAAAA
表示A相调制信号的有功分量，
Figure DEST_PATH_IMAGE251AAAAA
表示B相调制信号的有功分量，
Figure DEST_PATH_IMAGE253AAAAA
表示A相调制信号的无功分量，
Figure DEST_PATH_IMAGE255AAAAA
表示B相调制信号的无功分量，
Figure DEST_PATH_IMAGE257AAAAA
表示电网角频率，t表示时间，对半桥变换器调制信号的有功分量和无功分量进行旋转坐标逆变换的二阶变换矩阵为
Figure DEST_PATH_IMAGE259AAAAA
矩阵。in,
Figure 948090DEST_PATH_IMAGE241
Indicates the modulation signal of the A-phase switch tube,
Figure DEST_PATH_IMAGE243AAAAAA
Indicates the modulation signal of the B-phase switch tube,
Figure DEST_PATH_IMAGE245AAAAA
represents the virtual signal of the constructed lag A-phase switch tube modulation signal,
Figure DEST_PATH_IMAGE247AAAAA
represents the virtual signal of the constructed lag B-phase switch tube modulation signal,
Figure DEST_PATH_IMAGE249AAAAA
represents the active component of the A-phase modulated signal,
Figure DEST_PATH_IMAGE251AAAAA
represents the active component of the B-phase modulated signal,
Figure DEST_PATH_IMAGE253AAAAA
Represents the reactive component of the A-phase modulated signal,
Figure DEST_PATH_IMAGE255AAAAA
Represents the reactive component of the B-phase modulated signal,
Figure DEST_PATH_IMAGE257AAAAA
represents the grid angular frequency, t represents the time, and the second-order transformation matrix for inversely transforming the active and reactive components of the modulation signal of the half-bridge converter is:
Figure DEST_PATH_IMAGE259AAAAA
matrix.

在本发明实施例中，如图3所示，是网侧电压波形和补偿前后的三相网侧电流波形，补偿前不平衡度为67.50%，功率因数为0.8090，补偿后不平衡度为2.63%，功率因数为0.9999，结果表明，本发明的三相电能质量补偿装置能有效改善三相不平衡和提高功率因数。In the embodiment of the present invention, as shown in Figure 3, it is the grid-side voltage waveform and the three-phase grid-side current waveform before and after compensation, the unbalance degree before compensation is 67.50%, the power factor is 0.8090, and the unbalance degree after compensation is 2.63 %, and the power factor is 0.9999. The results show that the three-phase power quality compensation device of the present invention can effectively improve the three-phase unbalance and improve the power factor.

本发明的工作原理及过程为：在本发明中，半桥变换器产生的电流和不平衡负载的电流之和是平衡的，使三相电网的电流是平衡的，所以半桥变换器是补偿装置，来补偿不平衡负载带来的不平衡电流。基于半桥变换器的三相电能质量补偿装置所需的开关管为四个，所需的电流传感器为五个，相较于三相有源电力滤波器，可减少两个开关管，一个电流传感器。使用锁相环对三相网侧电压进行锁相，得到三相网侧电压的相位，采集A相网侧电压、三相负载电流和两相补偿电流，进行旋转坐标变换，得到A相网侧电压、三相负载电流和两相补偿电流的有功分量和无功分量。根据三相网侧平衡和无功为零以及维持直流电压稳定的条件，将负载电流的有功分量和无功分量以及维持直流电压稳定的有功电流进行

Figure DEST_PATH_IMAGE323
变换，得到补偿电流在相电压参考系下的有功分量和无功分量，由于变换器输出端连接的是三相网侧线电压，而旋转坐标变换的参考相位是相电压的相位，两者存在角度差，将会在线电压参考系下引入无功，因此需要对补偿电流的参考值进行交叉变换，在补偿电流有功分量参考值中注入一定的无功分量，在补偿电流无功分量参考值中注入一定的有功分量，得到补偿电流在线电压参考系下的有功分量和无功分量，将补偿电流在线电压参考系下的有功分量和无功分量进行dq解耦控制，得到调制信号的有功分量和无功分量，通过旋转坐标反变换，得到变换器的调制信号，将调制信号进行PWM调制，得到开关管的驱动信号。The working principle and process of the present invention are as follows: in the present invention, the sum of the current generated by the half-bridge converter and the current of the unbalanced load is balanced, so that the current of the three-phase power grid is balanced, so the half-bridge converter is a compensation device to compensate for the unbalanced current caused by the unbalanced load. The three-phase power quality compensation device based on the half-bridge converter requires four switches and five current sensors. Compared with the three-phase active power filter, it can reduce two switches and one current. sensor. Use the phase-locked loop to phase-lock the three-phase grid-side voltage, obtain the phase of the three-phase grid-side voltage, collect the A-phase grid-side voltage, three-phase load current and two-phase compensation current, and perform rotational coordinate transformation to obtain the A-phase grid side. Active and reactive components of voltage, three-phase load current and two-phase compensation current. According to the condition of three-phase grid-side balance and zero reactive power and maintaining stable DC voltage, the active and reactive components of the load current and the active current that maintains stable DC voltage are calculated.
Figure DEST_PATH_IMAGE323
Transform to obtain the active and reactive components of the compensation current in the phase voltage reference frame. Since the output terminal of the converter is connected to the three-phase grid side line voltage, and the reference phase of the rotation coordinate transformation is the phase of the phase voltage, there is an angle between the two. Poor, reactive power will be introduced in the line voltage reference system, so it is necessary to cross-transform the reference value of the compensation current, inject a certain reactive power component into the reference value of the active component of the compensation current, and inject a certain amount of reactive power into the reference value of the reactive component of the compensation current. With a certain active component, the active and reactive components of the compensation current under the online voltage reference frame are obtained, and the active and reactive components of the compensation current under the online voltage reference frame are controlled by dq decoupling to obtain the active and reactive components of the modulated signal. The power component is inversely transformed by the rotating coordinate to obtain the modulation signal of the converter, and the modulation signal is PWM modulated to obtain the driving signal of the switch tube.

本发明的有益效果为：The beneficial effects of the present invention are:

本发明提出一种基于半桥变换器的三相电能质量补偿装置，采用单相半桥背靠背的拓扑，减少开关管和电流传感器的数量，实时检测三相负载电流，相对于传统的并联电容器，本发明既可以动态补偿无功，也可以动态补偿有功不平衡，不易发生谐振。相对于传统的三相有源电力滤波器，本发明可以减少两个开关管和一个电流传感器，降低成本，经济性强。The invention proposes a three-phase power quality compensation device based on a half-bridge converter, which adopts a single-phase half-bridge back-to-back topology, reduces the number of switching tubes and current sensors, and detects the three-phase load current in real time. Compared with the traditional parallel capacitor, the The invention can not only compensate reactive power dynamically, but also can compensate the imbalance of active power dynamically, so that resonance is not easy to occur. Compared with the traditional three-phase active power filter, the present invention can reduce two switching tubes and one current sensor, thereby reducing the cost and being highly economical.

本发明的三相电能质量补偿方法采用

Figure DEST_PATH_IMAGE325
变换和交叉变换得到补偿电流在线电压参考系下的有功分量和无功分量参考值，在旋转坐标系下对补偿电流进行dq解耦控制，能够实现电流跟踪无静差，具有良好的电流跟踪性能，实现三相不平衡和无功的动态补偿，可应用到二极管钳位多电平拓扑和模块化多电平（MMC）拓扑，具有较强的适用性与延展性。The three-phase power quality compensation method of the present invention adopts
Figure DEST_PATH_IMAGE325
Transform and cross-transform to obtain the reference values of active and reactive components of the compensation current in the on-line voltage reference frame, and perform dq decoupling control of the compensation current in the rotating coordinate system, which can realize current tracking without static error and has good current tracking performance. , to achieve dynamic compensation of three-phase unbalance and reactive power, and can be applied to diode-clamped multi-level topology and modular multi-level (MMC) topology, with strong applicability and ductility.

本领域的普通技术人员将会意识到，这里所述的实施例是为了帮助读者理解本发明的原理，应被理解为本发明的保护范围并不局限于这样的特别陈述和实施例。本领域的普通技术人员可以根据本发明公开的这些技术启示做出各种不脱离本发明实质的其它各种具体变形和组合，这些变形和组合仍然在本发明的保护范围内。Those of ordinary skill in the art will appreciate that the embodiments described herein are intended to assist readers in understanding the principles of the present invention, and it should be understood that the scope of protection of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations without departing from the essence of the present invention according to the technical teaching disclosed in the present invention, and these modifications and combinations still fall within the protection scope of the present invention.

Claims (10)

1.一种基于半桥变换器的三相电能质量补偿装置，其特征在于，包括电网
Figure DEST_PATH_IMAGE002AAA
、电网
Figure DEST_PATH_IMAGE004AAA
、电网
Figure DEST_PATH_IMAGE006AAA
、负载
Figure 476129DEST_PATH_IMAGE007
、负载
Figure 479857DEST_PATH_IMAGE008
、负载
Figure 999832DEST_PATH_IMAGE009
、滤波电感
Figure DEST_PATH_IMAGE011AAAA
、滤波电感
Figure DEST_PATH_IMAGE013AAAA
、电流传感器
Figure DEST_PATH_IMAGE015AA
、支撑电容
Figure DEST_PATH_IMAGE017AA
、开关管
Figure DEST_PATH_IMAGE019A
和反并联二极管
Figure DEST_PATH_IMAGE021A
；1. a three-phase power quality compensation device based on a half-bridge converter is characterized in that, comprising a power grid
Figure DEST_PATH_IMAGE002AAA
, power grid
Figure DEST_PATH_IMAGE004AAA
, power grid
Figure DEST_PATH_IMAGE006AAA
,load
Figure 476129DEST_PATH_IMAGE007
,load
Figure 479857DEST_PATH_IMAGE008
,load
Figure 999832DEST_PATH_IMAGE009
, filter inductor
Figure DEST_PATH_IMAGE011AAAA
, filter inductor
Figure DEST_PATH_IMAGE013AAAA
,current sensor
Figure DEST_PATH_IMAGE015AA
, support capacitor
Figure DEST_PATH_IMAGE017AA
,turning tube
Figure DEST_PATH_IMAGE019A
and anti-parallel diodes
Figure DEST_PATH_IMAGE021A
; 所述电网
Figure DEST_PATH_IMAGE002AAAA
的正极分别与滤波电感
Figure DEST_PATH_IMAGE011AAAAA
的一端和电流传感器
Figure DEST_PATH_IMAGE023AA
的一端连接，其负极分别与电网
Figure DEST_PATH_IMAGE004AAAA
的负极和电网
Figure DEST_PATH_IMAGE006AAAA
的负极连接；所述电网
Figure DEST_PATH_IMAGE004AAAAA
的正极分别与滤波电感
Figure DEST_PATH_IMAGE013AAAAA
的一端和电流传感器
Figure DEST_PATH_IMAGE025AA
的一端连接；所述电网
Figure DEST_PATH_IMAGE006AAAAA
的正极和电流传感器
Figure DEST_PATH_IMAGE027AA
的一端连接，其连接点还与支撑电容
Figure 459150DEST_PATH_IMAGE028
的一端和支撑电容
Figure 339251DEST_PATH_IMAGE029
的一端连接的连接点连接；所述电流传感器
Figure DEST_PATH_IMAGE031AAAAA
的另一端和负载
Figure 869589DEST_PATH_IMAGE007
的一端连接；所述电流传感器
Figure DEST_PATH_IMAGE033AAAAA
的另一端和负载
Figure 248880DEST_PATH_IMAGE008
的一端连接；所述电流传感器
Figure DEST_PATH_IMAGE027AAA
的另一端和负载
Figure 582778DEST_PATH_IMAGE009
的一端连接；所述负载
Figure 141936DEST_PATH_IMAGE007
的另一端分别与负载
Figure 730043DEST_PATH_IMAGE008
的另一端和负载
Figure 450874DEST_PATH_IMAGE009
的另一端连接；所述滤波电感
Figure DEST_PATH_IMAGE011AAAAAA
的另一端和电流传感器
Figure DEST_PATH_IMAGE035AA
的一端连接；所述滤波电感
Figure DEST_PATH_IMAGE013AAAAAA
的另一端和电流传感器
Figure DEST_PATH_IMAGE037AAA
的一端连接；所述电流传感器
Figure DEST_PATH_IMAGE035AAA
的另一端分别与开关管
Figure 450230DEST_PATH_IMAGE038
的发射极、反并联二极管
Figure DEST_PATH_IMAGE040AAAA
的正极、开关管
Figure 734450DEST_PATH_IMAGE041
的集电极和反并联二极管
Figure DEST_PATH_IMAGE040AAAAA
的负极连接；所述开关管
Figure 131058DEST_PATH_IMAGE038
的集电极分别与反并联二极管
Figure DEST_PATH_IMAGE040AAAAAA
的负极、支撑电容
Figure 960474DEST_PATH_IMAGE028
的另一端、开关管
Figure 3385DEST_PATH_IMAGE042
的集电极和反并联二极管
Figure DEST_PATH_IMAGE044AAA
的负极连接；所述电流传感器
Figure DEST_PATH_IMAGE037AAAA
的另一端分别与开关管
Figure 530444DEST_PATH_IMAGE042
的发射极、反并联二极管
Figure DEST_PATH_IMAGE044AAAA
的正极、开关管
Figure 93143DEST_PATH_IMAGE045
的集电极和反并联二极管
Figure DEST_PATH_IMAGE047AAA
的负极连接；所述开关管
Figure 483673DEST_PATH_IMAGE045
的发射极分别与反并联二极管
Figure DEST_PATH_IMAGE047AAAA
的正极、支撑电容
Figure 312083DEST_PATH_IMAGE029
的另一端、开关管
Figure 157680DEST_PATH_IMAGE041
的发射极和反并联二极管
Figure DEST_PATH_IMAGE049AA
的正极连接；the grid
Figure DEST_PATH_IMAGE002AAAA
The positive poles are respectively connected with the filter inductor
Figure DEST_PATH_IMAGE011AAAAA
one end and the current sensor
Figure DEST_PATH_IMAGE023AA
One end is connected to the grid, and its negative poles are respectively connected to the grid
Figure DEST_PATH_IMAGE004AAAA
negative and grid
Figure DEST_PATH_IMAGE006AAAA
negative connection of the grid; the grid
Figure DEST_PATH_IMAGE004AAAAA
The positive poles are respectively connected with the filter inductor
Figure DEST_PATH_IMAGE013AAAAA
one end and the current sensor
Figure DEST_PATH_IMAGE025AA
one end of the connection; the grid
Figure DEST_PATH_IMAGE006AAAAA
positive and current sensors
Figure DEST_PATH_IMAGE027AA
one end is connected, and its connection point is also connected to the supporting capacitor
Figure 459150DEST_PATH_IMAGE028
one end of the and support capacitors
Figure 339251DEST_PATH_IMAGE029
one end is connected to the connection point connection; the current sensor
Figure DEST_PATH_IMAGE031AAAAA
the other end and the load
Figure 869589DEST_PATH_IMAGE007
one end of the connection; the current sensor
Figure DEST_PATH_IMAGE033AAAAA
the other end and the load
Figure 248880DEST_PATH_IMAGE008
one end of the connection; the current sensor
Figure DEST_PATH_IMAGE027AAA
the other end and the load
Figure 582778DEST_PATH_IMAGE009
one end of the connection; the load
Figure 141936DEST_PATH_IMAGE007
the other end of the respectively and the load
Figure 730043DEST_PATH_IMAGE008
the other end and the load
Figure 450874DEST_PATH_IMAGE009
the other end of the connection; the filter inductor
Figure DEST_PATH_IMAGE011AAAAAA
the other end and the current sensor
Figure DEST_PATH_IMAGE035AA
one end of the connection; the filter inductor
Figure DEST_PATH_IMAGE013AAAAAA
the other end and the current sensor
Figure DEST_PATH_IMAGE037AAA
one end of the connection; the current sensor
Figure DEST_PATH_IMAGE035AAA
The other end of , respectively, is connected with the switch tube
Figure 450230DEST_PATH_IMAGE038
emitter, anti-parallel diode
Figure DEST_PATH_IMAGE040AAAA
positive pole, switch tube
Figure 734450DEST_PATH_IMAGE041
The collector and anti-parallel diodes
Figure DEST_PATH_IMAGE040AAAAA
The negative pole of the connection; the switch tube
Figure 131058DEST_PATH_IMAGE038
The collectors are respectively connected with anti-parallel diodes
Figure DEST_PATH_IMAGE040AAAAAA
negative pole, support capacitor
Figure 960474DEST_PATH_IMAGE028
the other end of the switch tube
Figure 3385DEST_PATH_IMAGE042
The collector and anti-parallel diodes
Figure DEST_PATH_IMAGE044AAA
negative connection; the current sensor
Figure DEST_PATH_IMAGE037AAAA
The other end of , respectively, is connected with the switch tube
Figure 530444DEST_PATH_IMAGE042
emitter, anti-parallel diode
Figure DEST_PATH_IMAGE044AAAA
positive pole, switch tube
Figure 93143DEST_PATH_IMAGE045
The collector and anti-parallel diodes
Figure DEST_PATH_IMAGE047AAA
The negative pole of the connection; the switch tube
Figure 483673DEST_PATH_IMAGE045
The emitters are respectively connected with anti-parallel diodes
Figure DEST_PATH_IMAGE047AAAA
positive electrode, support capacitor
Figure 312083DEST_PATH_IMAGE029
the other end of the switch tube
Figure 157680DEST_PATH_IMAGE041
The emitter and anti-parallel diode
Figure DEST_PATH_IMAGE049AA
positive connection; 所述支撑电容
Figure DEST_PATH_IMAGE017AAA
、开关管
Figure DEST_PATH_IMAGE019AA
和反并联二极管
Figure DEST_PATH_IMAGE021AA
组成半桥变换器；所述负载
Figure 450252DEST_PATH_IMAGE007
、负载
Figure 152629DEST_PATH_IMAGE008
和负载
Figure 904553DEST_PATH_IMAGE009
组成不平衡负载；The support capacitor
Figure DEST_PATH_IMAGE017AAA
,turning tube
Figure DEST_PATH_IMAGE019AA
and anti-parallel diodes
Figure DEST_PATH_IMAGE021AA
form a half-bridge converter; the load
Figure 450252DEST_PATH_IMAGE007
,load
Figure 152629DEST_PATH_IMAGE008
and load
Figure 904553DEST_PATH_IMAGE009
form an unbalanced load; 所述电流传感器
Figure DEST_PATH_IMAGE051AA
均用于测量负载电流，所述电流传感器
Figure DEST_PATH_IMAGE053AA
和
Figure DEST_PATH_IMAGE055AAA
分别用于测量A相和B相的补偿电流。the current sensor
Figure DEST_PATH_IMAGE051AA
are used to measure load current, the current sensor
Figure DEST_PATH_IMAGE053AA
and
Figure DEST_PATH_IMAGE055AAA
It is used to measure the compensation current of A-phase and B-phase, respectively. 2.一种基于半桥变换器的三相电能质量补偿方法，其特征在于，包括以下步骤：2. A three-phase power quality compensation method based on a half-bridge converter, characterized in that, comprising the following steps: S1：利用锁相环对网侧电压的相位进行锁定，并获取三相网侧电压的相位；S1: Use the phase-locked loop to lock the phase of the grid-side voltage, and obtain the phase of the three-phase grid-side voltage; S2：根据三相网侧电压的相位，对A相网侧电压、三相负载电流和补偿电流进行旋转坐标转换，得到A相网侧电压的有功分量和无功分量、三相负载电流的有功分量和无功分量与补偿电流的有功分量和无功分量；S2: According to the phase of the three-phase grid-side voltage, perform rotational coordinate transformation on the A-phase grid-side voltage, three-phase load current and compensation current to obtain the active and reactive components of the A-phase grid-side voltage, and the active power of the three-phase load current. Component and reactive component and active component and reactive component of compensation current; S3：将三相负载电流的有功分量和无功分量、补偿电流的有功分量和无功分量与维持直流电压稳定的有功电流进行
Figure DEST_PATH_IMAGE057AA
变换，得到补偿电流在相电压参考系下的有功分量参考值和无功分量参考值；S3: Compare the active and reactive components of the three-phase load current, the active and reactive components of the compensation current, and the active current that maintains DC voltage stability.
Figure DEST_PATH_IMAGE057AA
Transform to obtain the active component reference value and reactive component reference value of the compensation current in the phase voltage reference frame; S4：将补偿电流在相电压参考系下的有功分量参考值和无功分量参考值进行交叉变换，得到补偿电流在线电压参考系下的有功分量参考值和无功分量参考值；S4: Cross-transform the active component reference value and reactive component reference value of the compensation current in the phase voltage reference system to obtain the active component reference value and reactive component reference value of the compensation current in the on-line voltage reference system; S5：根据A相网侧电压的有功分量和无功分量，将补偿电流的有功分量和无功分量与补偿电流在线电压参考系下的有功分量参考值和无功分量参考值进行dq解耦控制，得到半桥变换器调制信号的有功分量和无功分量；S5: According to the active and reactive components of the A-phase grid-side voltage, perform dq decoupling control on the active and reactive components of the compensation current and the reference values of the active components and reactive components of the compensation current in the on-line voltage reference system , obtain the active and reactive components of the half-bridge converter modulation signal; S6：将半桥变换器调制信号的有功分量和无功分量进行旋转坐标逆变换，得到半桥变换器的调制信号；S6: Inversely transform the rotation coordinates of the active component and the reactive component of the modulation signal of the half-bridge converter to obtain the modulation signal of the half-bridge converter; S7：将半桥变换器的调制信号进行PWM调制，得到半桥变换器开关管的驱动信号，完成基于半桥变换器的三相电能质量补偿。S7: PWM modulation is performed on the modulation signal of the half-bridge converter to obtain the driving signal of the switching tube of the half-bridge converter, and the three-phase power quality compensation based on the half-bridge converter is completed. 3.根据权利要求2所述的基于半桥变换器的三相电能质量补偿方法，其特征在于，所述步骤S2中，对A相网侧电压进行旋转坐标转换的公式为：3. The three-phase power quality compensation method based on a half-bridge converter according to claim 2, characterized in that, in the step S2, the formula for performing rotational coordinate conversion on the A-phase grid side voltage is:
Figure DEST_PATH_IMAGE059AA
Figure DEST_PATH_IMAGE059AA
 对A相负载电流和补偿电流进行旋转坐标转换的公式分别为：The formulas for the rotation coordinate transformation of the A-phase load current and compensation current are:
Figure DEST_PATH_IMAGE061AA
Figure DEST_PATH_IMAGE061AA
 其中，
Figure DEST_PATH_IMAGE063AA
表示A相网侧电压的有功分量，
Figure DEST_PATH_IMAGE065AA
表示A相网侧电压的无功分量，对A相网侧电压进行旋转坐标转换的二阶变换矩阵为P矩阵，
Figure DEST_PATH_IMAGE067AA
表示A相网侧电压，
Figure DEST_PATH_IMAGE069AA
表示相位滞后于A相网侧电压的虚拟电压，
Figure DEST_PATH_IMAGE071AA
表示A相负载电流的有功分量，
Figure DEST_PATH_IMAGE073AA
表示A相负载电流的无功分量，
Figure DEST_PATH_IMAGE075AA
表示A相补偿电流的有功分量，
Figure DEST_PATH_IMAGE077AA
表示A相补偿电流的无功分量，
Figure DEST_PATH_IMAGE079AA
表示A相负载电流，
Figure DEST_PATH_IMAGE081AA
表示相位滞后于A相负载交流的虚拟电流，
Figure DEST_PATH_IMAGE083AA
表示A相补偿电流，
Figure DEST_PATH_IMAGE085AA
表示相位滞后于A相补偿电流的虚拟电流，
Figure DEST_PATH_IMAGE087AA
表示电网角频率，t表示时间；in,
Figure DEST_PATH_IMAGE063AA
Represents the active component of the A-phase grid-side voltage,
Figure DEST_PATH_IMAGE065AA
Represents the reactive component of the A-phase grid-side voltage, and the second-order transformation matrix for the rotational coordinate transformation of the A-phase grid-side voltage is the P matrix,
Figure DEST_PATH_IMAGE067AA
Indicates the A-phase grid side voltage,
Figure DEST_PATH_IMAGE069AA
represents the virtual voltage whose phase lags behind the A-phase grid-side voltage,
Figure DEST_PATH_IMAGE071AA
represents the active component of the A-phase load current,
Figure DEST_PATH_IMAGE073AA
Represents the reactive component of the A-phase load current,
Figure DEST_PATH_IMAGE075AA
Represents the active component of the A-phase compensation current,
Figure DEST_PATH_IMAGE077AA
Represents the reactive component of the A-phase compensation current,
Figure DEST_PATH_IMAGE079AA
represents the phase A load current,
Figure DEST_PATH_IMAGE081AA
represents the virtual current whose phase lags behind the A-phase load AC,
Figure DEST_PATH_IMAGE083AA
Indicates the A-phase compensation current,
Figure DEST_PATH_IMAGE085AA
represents the virtual current whose phase lags behind the A-phase compensation current,
Figure DEST_PATH_IMAGE087AA
represents the grid angular frequency, and t represents the time; 对B相负载电流和补偿电流进行旋转坐标转换的公式分别为：The formulas for the rotation coordinate transformation of the B-phase load current and compensation current are:
Figure DEST_PATH_IMAGE089AA
Figure DEST_PATH_IMAGE089AA
 其中，
Figure DEST_PATH_IMAGE091AA
表示B相负载电流的有功分量，
Figure DEST_PATH_IMAGE093AA
表示B相负载电流的无功分量，
Figure DEST_PATH_IMAGE095AA
表示B相补偿电流的有功分量，
Figure DEST_PATH_IMAGE097AA
表示B相补偿电流的无功分量，
Figure DEST_PATH_IMAGE099AA
表示B相负载电流，
Figure DEST_PATH_IMAGE101AA
表示相位滞后于B相负载交流的虚拟电流，
Figure DEST_PATH_IMAGE103AA
表示B相补偿电流，
Figure DEST_PATH_IMAGE105AA
表示相位滞后于B相补偿电流的虚拟电流；in,
Figure DEST_PATH_IMAGE091AA
represents the active component of the B-phase load current,
Figure DEST_PATH_IMAGE093AA
Represents the reactive component of the B-phase load current,
Figure DEST_PATH_IMAGE095AA
represents the active component of the B-phase compensation current,
Figure DEST_PATH_IMAGE097AA
Represents the reactive component of the B-phase compensation current,
Figure DEST_PATH_IMAGE099AA
represents the B-phase load current,
Figure DEST_PATH_IMAGE101AA
represents the virtual current that the phase lags behind the B-phase load AC,
Figure DEST_PATH_IMAGE103AA
represents the B-phase compensation current,
Figure DEST_PATH_IMAGE105AA
Indicates the virtual current whose phase lags behind the B-phase compensation current; 对C相负载电流和补偿电流进行旋转坐标转换的公式分别为：The formulas for the rotation coordinate transformation of the C-phase load current and compensation current are:
Figure DEST_PATH_IMAGE107AA
Figure DEST_PATH_IMAGE107AA
 其中，
Figure DEST_PATH_IMAGE109AA
表示C相负载电流的有功分量，
Figure DEST_PATH_IMAGE111AA
表示C相负载电流的无功分量，
Figure DEST_PATH_IMAGE113AA
表示C相补偿电流的有功分量，
Figure DEST_PATH_IMAGE115AA
表示C相补偿电流的无功分量，
Figure DEST_PATH_IMAGE117AA
表示C相负载电流，
Figure DEST_PATH_IMAGE109AAA
表示相位滞后于C相负载交流的虚拟电流，
Figure DEST_PATH_IMAGE119AAA
表示C相补偿电流，
Figure DEST_PATH_IMAGE121AA
表示相位滞后于C相补偿电流的虚拟电流。in,
Figure DEST_PATH_IMAGE109AA
represents the active component of the C-phase load current,
Figure DEST_PATH_IMAGE111AA
represents the reactive component of the C-phase load current,
Figure DEST_PATH_IMAGE113AA
represents the active component of the C-phase compensation current,
Figure DEST_PATH_IMAGE115AA
Represents the reactive component of the C-phase compensation current,
Figure DEST_PATH_IMAGE117AA
represents the C-phase load current,
Figure DEST_PATH_IMAGE109AAA
represents the virtual current whose phase lags behind the C-phase load AC,
Figure DEST_PATH_IMAGE119AAA
Indicates the C-phase compensation current,
Figure DEST_PATH_IMAGE121AA
Indicates a virtual current whose phase lags behind the C-phase compensation current. 4.根据权利要求3所述的基于半桥变换器的三相电能质量补偿方法，其特征在于，所述步骤S2中，三相网侧电流的有功分量和无功分量满足的表达式为：4. The three-phase power quality compensation method based on a half-bridge converter according to claim 3, wherein in the step S2, the expressions satisfied by the active component and the reactive component of the three-phase grid-side current are:
Figure 479408DEST_PATH_IMAGE122
Figure 479408DEST_PATH_IMAGE122
 其中，
Figure 265967DEST_PATH_IMAGE123
表示A相网侧电流有功分量的参考值，
Figure 935983DEST_PATH_IMAGE124
表示B相网侧电流有功分量的参考值，
Figure 925935DEST_PATH_IMAGE125
表示C相网侧电流有功分量的参考值，
Figure 706810DEST_PATH_IMAGE126
表示A相网侧电流无功分量的参考值，
Figure 849340DEST_PATH_IMAGE127
表示B相网侧电流无功分量的参考值，
Figure 893520DEST_PATH_IMAGE128
表示C相网侧电流无功分量的参考值，
Figure DEST_PATH_IMAGE130A
表示A相负载电流的有功分量，
Figure DEST_PATH_IMAGE132A
表示B相负载电流的有功分量，
Figure DEST_PATH_IMAGE134A
表示C相负载电流的有功分量。in,
Figure 265967DEST_PATH_IMAGE123
Indicates the reference value of the active component of the A-phase grid side current,
Figure 935983DEST_PATH_IMAGE124
Indicates the reference value of the active component of the B-phase grid-side current,
Figure 925935DEST_PATH_IMAGE125
Indicates the reference value of the active component of the C-phase grid side current,
Figure 706810DEST_PATH_IMAGE126
Represents the reference value of the reactive component of the A-phase grid side current,
Figure 849340DEST_PATH_IMAGE127
Represents the reference value of the reactive power component of the B-phase grid side current,
Figure 893520DEST_PATH_IMAGE128
Represents the reference value of the reactive component of the C-phase grid side current,
Figure DEST_PATH_IMAGE130A
represents the active component of the A-phase load current,
Figure DEST_PATH_IMAGE132A
represents the active component of the B-phase load current,
Figure DEST_PATH_IMAGE134A
Indicates the active component of the C-phase load current. 5.根据权利要求2所述的基于半桥变换器的三相电能质量补偿方法，其特征在于，所述步骤S3包括以下子步骤：5. The three-phase power quality compensation method based on a half-bridge converter according to claim 2, wherein the step S3 comprises the following sub-steps: S31：将直流侧电容电压的闭环输出注入至补偿电流中，得到维持直流电压稳定的有功电流
Figure DEST_PATH_IMAGE136A
；S31: Inject the closed-loop output of the DC side capacitor voltage into the compensation current to obtain an active current that maintains a stable DC voltage
Figure DEST_PATH_IMAGE136A
; S32：对三相负载电流的有功分量和无功分量、补偿电流的有功分量和无功分量与维持直流电压稳定的有功电流
Figure DEST_PATH_IMAGE138A
进行
Figure DEST_PATH_IMAGE140A
变换，得到补偿电流在相电压参考系下的有功分量参考值和无功分量参考值。S32: For the active and reactive components of the three-phase load current, the active and reactive components of the compensation current, and the active current for maintaining the stability of the DC voltage
Figure DEST_PATH_IMAGE138A
conduct
Figure DEST_PATH_IMAGE140A
Transform to obtain the active component reference value and reactive component reference value of the compensation current in the phase voltage reference frame. 6.根据权利要求5所述的基于半桥变换器的三相电能质量补偿方法，其特征在于，所述步骤S31中，维持直流电压稳定的有功电流
Figure DEST_PATH_IMAGE142A
的计算公式为：6 . The three-phase power quality compensation method based on a half-bridge converter according to claim 5 , wherein, in the step S31 , the active current with a stable DC voltage is maintained. 7 .
Figure DEST_PATH_IMAGE142A
The calculation formula is:
Figure 562312DEST_PATH_IMAGE143
Figure 562312DEST_PATH_IMAGE143
 其中，S表示复频率，
Figure DEST_PATH_IMAGE145AA
表示电压环的第一控制参数，
Figure DEST_PATH_IMAGE147AA
表示电压环的第二控制参数，
Figure 976238DEST_PATH_IMAGE148
表示直流侧电压的参考值，
Figure DEST_PATH_IMAGE150A
表示直流侧电压。where S is the complex frequency,
Figure DEST_PATH_IMAGE145AA
represents the first control parameter of the voltage loop,
Figure DEST_PATH_IMAGE147AA
represents the second control parameter of the voltage loop,
Figure 976238DEST_PATH_IMAGE148
Indicates the reference value of the DC side voltage,
Figure DEST_PATH_IMAGE150A
Indicates the DC side voltage. 7.根据权利要求5所述的基于半桥变换器的三相电能质量补偿方法，其特征在于，所述步骤S32中，对A相负载电流的有功分量和无功分量、补偿电流的有功分量和无功分量与维持直流电压稳定的有功电流
Figure DEST_PATH_IMAGE152A
进行
Figure DEST_PATH_IMAGE154A
变换的公式分别为：7 . The three-phase power quality compensation method based on a half-bridge converter according to claim 5 , wherein, in the step S32 , the active and reactive components of the A-phase load current and the active component of the compensation current are calculated. 8 . and reactive components and active current to maintain the stability of the DC voltage
Figure DEST_PATH_IMAGE152A
conduct
Figure DEST_PATH_IMAGE154A
The transformation formulas are:
Figure 35592DEST_PATH_IMAGE155
Figure 35592DEST_PATH_IMAGE155
Figure 47410DEST_PATH_IMAGE156
；
Figure 47410DEST_PATH_IMAGE156
; 对B相负载电流的有功分量和无功分量、补偿电流的有功分量和无功分量与维持直流电压稳定的有功电流
Figure DEST_PATH_IMAGE152AA
进行
Figure DEST_PATH_IMAGE154AA
变换的公式分别为：For the active and reactive components of the B-phase load current, the active and reactive components of the compensation current, and the active current for maintaining the stability of the DC voltage
Figure DEST_PATH_IMAGE152AA
conduct
Figure DEST_PATH_IMAGE154AA
The transformation formulas are:
Figure 887322DEST_PATH_IMAGE157
Figure 887322DEST_PATH_IMAGE157
 其中，
Figure 275578DEST_PATH_IMAGE158
表示A相补偿电流在相电压参考系下的有功分量参考值，
Figure 704285DEST_PATH_IMAGE159
表示A相补偿电流在相电压参考系下的无功分量参考值，
Figure 559108DEST_PATH_IMAGE160
表示B相补偿电流在相电压参考系下的有功分量参考值，
Figure 338846DEST_PATH_IMAGE161
表示B相补偿电流在相电压参考系下的无功分量参考值，
Figure DEST_PATH_IMAGE163AA
表示A相负载电流的有功分量，
Figure DEST_PATH_IMAGE165AA
表示B相负载电流的有功分量，
Figure DEST_PATH_IMAGE167AA
表示C相负载电流的有功分量，
Figure DEST_PATH_IMAGE169AA
表示A相负载电流的无功分量，
Figure DEST_PATH_IMAGE171AA
表示B相负载电流的无功分量；in,
Figure 275578DEST_PATH_IMAGE158
Indicates the reference value of the active component of the A-phase compensation current in the phase voltage reference frame,
Figure 704285DEST_PATH_IMAGE159
Represents the reference value of the reactive component of the A-phase compensation current in the phase voltage reference frame,
Figure 559108DEST_PATH_IMAGE160
Indicates the reference value of the active component of the B-phase compensation current in the phase voltage reference frame,
Figure 338846DEST_PATH_IMAGE161
Represents the reference value of the reactive component of the B-phase compensation current in the phase voltage reference frame,
Figure DEST_PATH_IMAGE163AA
represents the active component of the A-phase load current,
Figure DEST_PATH_IMAGE165AA
represents the active component of the B-phase load current,
Figure DEST_PATH_IMAGE167AA
represents the active component of the C-phase load current,
Figure DEST_PATH_IMAGE169AA
Represents the reactive component of the A-phase load current,
Figure DEST_PATH_IMAGE171AA
Represents the reactive component of the B-phase load current; 所述步骤S32中，根据基尔霍夫电流定律，网侧电流有功分量参考值和无功分量参考值、负载电流的有功分量和无功分量以及补偿电流在相电压参考系下有功分量参考值和无功分量参考值满足的表达式为：In the step S32, according to Kirchhoff's current law, the reference value of the active component and the reference value of the reactive component of the grid-side current, the active component and the reactive component of the load current, and the reference value of the active component of the compensation current in the phase voltage reference frame The expression satisfied by the reference value of the reactive power component is:
Figure DEST_PATH_IMAGE172
Figure DEST_PATH_IMAGE172
 其中，
Figure 875000DEST_PATH_IMAGE123
表示A相网侧电流有功分量的参考值，
Figure 158214DEST_PATH_IMAGE124
表示B相网侧电流有功分量的参考值，
Figure 403513DEST_PATH_IMAGE125
表示C相网侧电流有功分量的参考值，
Figure 201705DEST_PATH_IMAGE126
表示A相网侧电流无功分量的参考值，
Figure 807129DEST_PATH_IMAGE127
表示B相网侧电流无功分量的参考值，
Figure 741587DEST_PATH_IMAGE128
表示C相网侧电流无功分量的参考值，
Figure DEST_PATH_IMAGE174
表示A相负载电流的有功分量，
Figure DEST_PATH_IMAGE176
表示B相负载电流的有功分量，
Figure DEST_PATH_IMAGE178
表示C相负载电流的有功分量，
Figure DEST_PATH_IMAGE180
表示A相负载电流的无功分量，
Figure DEST_PATH_IMAGE182
表示B相负载电流的无功分量，
Figure DEST_PATH_IMAGE184
表示C相负载电流的无功分量，
Figure 875897DEST_PATH_IMAGE185
表示C相补偿电流在相电压参考系下的有功分量参考值，
Figure DEST_PATH_IMAGE186
表示C相补偿电流在相电压参考系下的无功分量参考值。in,
Figure 875000DEST_PATH_IMAGE123
Indicates the reference value of the active component of the A-phase grid side current,
Figure 158214DEST_PATH_IMAGE124
Indicates the reference value of the active component of the B-phase grid-side current,
Figure 403513DEST_PATH_IMAGE125
Indicates the reference value of the active component of the C-phase grid side current,
Figure 201705DEST_PATH_IMAGE126
Represents the reference value of the reactive component of the A-phase grid side current,
Figure 807129DEST_PATH_IMAGE127
Represents the reference value of the reactive power component of the B-phase grid side current,
Figure 741587DEST_PATH_IMAGE128
Represents the reference value of the reactive component of the C-phase grid side current,
Figure DEST_PATH_IMAGE174
represents the active component of the A-phase load current,
Figure DEST_PATH_IMAGE176
represents the active component of the B-phase load current,
Figure DEST_PATH_IMAGE178
represents the active component of the C-phase load current,
Figure DEST_PATH_IMAGE180
Represents the reactive component of the A-phase load current,
Figure DEST_PATH_IMAGE182
Represents the reactive component of the B-phase load current,
Figure DEST_PATH_IMAGE184
represents the reactive component of the C-phase load current,
Figure 875897DEST_PATH_IMAGE185
Indicates the reference value of the active component of the C-phase compensation current in the phase voltage reference frame,
Figure DEST_PATH_IMAGE186
Indicates the reference value of the reactive component of the C-phase compensation current in the phase voltage reference frame. 8.根据权利要求2所述的基于半桥变换器的三相电能质量补偿方法，其特征在于，所述步骤S4中，对A相补偿电流在相电压参考系下的有功分量参考值和无功分量参考值进行交叉变换的公式分别为：8 . The three-phase power quality compensation method based on the half-bridge converter according to claim 2 , wherein in the step S4 , the reference value of the active component of the A-phase compensation current in the phase voltage reference frame and the non-neutral value are compared. The formulas for the cross-transformation of the reference value of the power component are:
Figure 318641DEST_PATH_IMAGE187
Figure 318641DEST_PATH_IMAGE187
 对B相补偿电流在相电压参考系下的有功分量参考值和无功分量参考值进行交叉变换的公式分别为：The formulas for the cross-transformation of the active component reference value and the reactive component reference value of the B-phase compensation current in the phase voltage reference frame are:
Figure DEST_PATH_IMAGE188
Figure DEST_PATH_IMAGE188
 其中，
Figure 258916DEST_PATH_IMAGE189
表示A相补偿电流在线电压参考系下的有功分量参考值，
Figure DEST_PATH_IMAGE190
表示A相补偿电流在线电压参考系下的无功分量参考值，
Figure 969252DEST_PATH_IMAGE191
表示B相补偿电流在线电压参考系下的有功分量参考值，
Figure DEST_PATH_IMAGE192
表示B相补偿电流在线电压参考系下的无功分量参考值，
Figure 540041DEST_PATH_IMAGE158
表示A相补偿电流在相电压参考系下的有功分量参考值，
Figure 47246DEST_PATH_IMAGE159
表示A相补偿电流在相电压参考系下的无功分量参考值，
Figure 756925DEST_PATH_IMAGE160
表示B相补偿电流在相电压参考系下的有功分量参考值，
Figure 931554DEST_PATH_IMAGE161
表示B相补偿电流在相电压参考系下的无功分量参考值。in,
Figure 258916DEST_PATH_IMAGE189
Indicates the reference value of the active component of the A-phase compensation current in the on-line voltage reference frame,
Figure DEST_PATH_IMAGE190
Represents the reference value of the reactive component of the A-phase compensation current in the on-line voltage reference frame,
Figure 969252DEST_PATH_IMAGE191
Indicates the reference value of the active component of the B-phase compensation current in the on-line voltage reference frame,
Figure DEST_PATH_IMAGE192
Represents the reference value of the reactive component of the B-phase compensation current in the on-line voltage reference frame,
Figure 540041DEST_PATH_IMAGE158
Indicates the reference value of the active component of the A-phase compensation current in the phase voltage reference frame,
Figure 47246DEST_PATH_IMAGE159
Represents the reference value of the reactive component of the A-phase compensation current in the phase voltage reference frame,
Figure 756925DEST_PATH_IMAGE160
Represents the reference value of the active component of the B-phase compensation current in the phase voltage reference frame,
Figure 931554DEST_PATH_IMAGE161
Indicates the reference value of the reactive component of the B-phase compensation current in the phase voltage reference frame. 9.根据权利要求2所述的基于半桥变换器的三相电能质量补偿方法，其特征在于，所述步骤S5中， 对A相进行dq解耦控制的公式为：9 . The three-phase power quality compensation method based on a half-bridge converter according to claim 2 , wherein, in the step S5 , the formula for performing dq decoupling control on the A-phase is: 9 .
Figure 673245DEST_PATH_IMAGE193
Figure 673245DEST_PATH_IMAGE193
 对B相进行dq解耦控制的公式为：The formula for dq decoupling control of phase B is:
Figure DEST_PATH_IMAGE194
Figure DEST_PATH_IMAGE194
 其中，
Figure DEST_PATH_IMAGE196
表示A相调制信号的有功分量，
Figure DEST_PATH_IMAGE198
表示B相调制信号的有功分量，
Figure DEST_PATH_IMAGE200
表示A相调制信号的无功分量，
Figure DEST_PATH_IMAGE202
表示B相调制信号的无功分量，
Figure DEST_PATH_IMAGE204
表示电流环的第三控制参数，
Figure DEST_PATH_IMAGE206
表示电流环的第四控制参数，
Figure DEST_PATH_IMAGE208
表示A相网侧电压的有功分量，
Figure DEST_PATH_IMAGE210
表示A相网侧电压的无功分量，S表示复频率，
Figure 434790DEST_PATH_IMAGE189
表示A相补偿电流在线电压参考系下的有功分量参考值，
Figure 169397DEST_PATH_IMAGE191
表示B相补偿电流在线电压参考系下的有功分量参考值，
Figure 464112DEST_PATH_IMAGE190
表示A相补偿电流在线电压参考系下的无功分量参考值，
Figure 376704DEST_PATH_IMAGE192
表示B相补偿电流在线电压参考系下的无功分量参考值，
Figure DEST_PATH_IMAGE212
表示A相补偿电流的有功分量，
Figure DEST_PATH_IMAGE214
表示B相补偿电流的有功分量，
Figure DEST_PATH_IMAGE216
表示A相补偿电流的无功分量，
Figure DEST_PATH_IMAGE218
表示B相补偿电流的无功分量，
Figure DEST_PATH_IMAGE220
表示电网角频率，
Figure DEST_PATH_IMAGE222
表示A相滤波电感，
Figure DEST_PATH_IMAGE224
表示B相滤波电感。in,
Figure DEST_PATH_IMAGE196
represents the active component of the A-phase modulated signal,
Figure DEST_PATH_IMAGE198
represents the active component of the B-phase modulated signal,
Figure DEST_PATH_IMAGE200
Represents the reactive component of the A-phase modulated signal,
Figure DEST_PATH_IMAGE202
Represents the reactive component of the B-phase modulated signal,
Figure DEST_PATH_IMAGE204
represents the third control parameter of the current loop,
Figure DEST_PATH_IMAGE206
represents the fourth control parameter of the current loop,
Figure DEST_PATH_IMAGE208
Represents the active component of the A-phase grid-side voltage,
Figure DEST_PATH_IMAGE210
Represents the reactive component of the A-phase grid-side voltage, S represents the complex frequency,
Figure 434790DEST_PATH_IMAGE189
Indicates the reference value of the active component of the A-phase compensation current in the on-line voltage reference frame,
Figure 169397DEST_PATH_IMAGE191
Indicates the reference value of the active component of the B-phase compensation current in the on-line voltage reference frame,
Figure 464112DEST_PATH_IMAGE190
Represents the reference value of the reactive component of the A-phase compensation current in the on-line voltage reference frame,
Figure 376704DEST_PATH_IMAGE192
Represents the reference value of the reactive component of the B-phase compensation current in the on-line voltage reference frame,
Figure DEST_PATH_IMAGE212
represents the active component of the A-phase compensation current,
Figure DEST_PATH_IMAGE214
represents the active component of the B-phase compensation current,
Figure DEST_PATH_IMAGE216
Represents the reactive component of the A-phase compensation current,
Figure DEST_PATH_IMAGE218
Represents the reactive component of the B-phase compensation current,
Figure DEST_PATH_IMAGE220
represents the grid angular frequency,
Figure DEST_PATH_IMAGE222
Indicates the A-phase filter inductance,
Figure DEST_PATH_IMAGE224
Indicates the B-phase filter inductor. 10.根据权利要求2所述的基于半桥变换器的三相电能质量补偿方法，其特征在于，所述步骤S6中，对A相调制信号的有功分量和无功分量进行旋转坐标逆变换的公式为：10 . The three-phase power quality compensation method based on the half-bridge converter according to claim 2 , wherein, in the step S6 , the active component and the reactive component of the A-phase modulation signal are subjected to inverse transformation of the rotation coordinates. 11 . The formula is:
Figure DEST_PATH_IMAGE226
Figure DEST_PATH_IMAGE226
 对B相调制信号的有功分量和无功分量进行旋转坐标逆变换的公式为：The formula for the inverse transformation of the rotation coordinates of the active and reactive components of the B-phase modulation signal is:
Figure DEST_PATH_IMAGE228
Figure DEST_PATH_IMAGE228
 其中，
Figure 313961DEST_PATH_IMAGE229
表示A相开关管调制信号，
Figure DEST_PATH_IMAGE231A
表示B相开关管调制信号，
Figure DEST_PATH_IMAGE233A
表示构造的滞后A相开关管调制信号的虚拟信号，
Figure DEST_PATH_IMAGE235A
表示构造的滞后B相开关管调制信号的虚拟信号，
Figure DEST_PATH_IMAGE237A
表示A相调制信号的有功分量，
Figure DEST_PATH_IMAGE239A
表示B相调制信号的有功分量，
Figure DEST_PATH_IMAGE241A
表示A相调制信号的无功分量，
Figure DEST_PATH_IMAGE243A
表示B相调制信号的无功分量，
Figure DEST_PATH_IMAGE245A
表示电网角频率，t表示时间，对半桥变换器调制信号的有功分量和无功分量进行旋转坐标逆变换的二阶变换矩阵为
Figure DEST_PATH_IMAGE247A
矩阵。in,
Figure 313961DEST_PATH_IMAGE229
Indicates the modulation signal of the A-phase switch tube,
Figure DEST_PATH_IMAGE231A
Indicates the modulation signal of the B-phase switch tube,
Figure DEST_PATH_IMAGE233A
represents the virtual signal of the constructed lag A-phase switch tube modulation signal,
Figure DEST_PATH_IMAGE235A
represents the virtual signal of the constructed lag B-phase switch tube modulation signal,
Figure DEST_PATH_IMAGE237A
represents the active component of the A-phase modulated signal,
Figure DEST_PATH_IMAGE239A
represents the active component of the B-phase modulated signal,
Figure DEST_PATH_IMAGE241A
Represents the reactive component of the A-phase modulated signal,
Figure DEST_PATH_IMAGE243A
Represents the reactive component of the B-phase modulated signal,
Figure DEST_PATH_IMAGE245A
Represents the grid angular frequency, t represents the time, and the second-order transformation matrix for inversely transforming the active and reactive components of the modulation signal of the half-bridge converter is:
Figure DEST_PATH_IMAGE247A
matrix.
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