CN1359183A - Mixing type reactive power generator - Google Patents

Mixing type reactive power generator Download PDF

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Publication number
CN1359183A
CN1359183A CN 02109022 CN02109022A CN1359183A CN 1359183 A CN1359183 A CN 1359183A CN 02109022 CN02109022 CN 02109022 CN 02109022 A CN02109022 A CN 02109022A CN 1359183 A CN1359183 A CN 1359183A
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reactive power
voltage
system
generator
phase
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CN 02109022
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韩英铎
童路园
张玉良
马振库
刘宝珩
夏金娟
耿俊成
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张玉良
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30Reactive power compensation

Abstract

The mixed reactive power generator is formed from starting rectifier, GTO inverter, D.C. capactor group, inverter output transformer, connecting transformer, high voltage switch cabinet, control unit, detection unit, protection unit and cooling system. Said invention features small volume, low cost and small output voltage harmonic content, and as compared with static type reactive powre compensator valume the reactive support for providing stable load is less than 15-30%. Said invention can be used in the power system, can ensure electric net safety operation, improve user's electric energy qualit, solve the voltage pulsation, flicker and dissymmetric operation produced in arc furnace and electric railway system and prevent their resulted harm, etc.

Description

混合型无功功率发生器 Hybrid generator reactive power

技术领域 FIELD

本发明涉及一种应用于电力系统中,起到无功功率及电压的强有力支撑作用的混合型无功功率发生器。 The present invention relates to a system used in power, plays a strong supporting role in the reactive power and the voltage of the hybrid type reactive power generator.

背景技术 Background technique

目前,国内冶金企业轧钢及电弧炉炼钢生产过程中产生的无功功率冲击、电压波动、电压闪变及高次谐波的补偿与治理,均采用传统的静止型无功功率补偿器。 At present, the impact of the reactive power and domestic metallurgical EAF steelmaking rolling production process, voltage fluctuations, voltage flicker and higher harmonics compensation and control, are used in the conventional static type reactive power compensator. 此种装置由于其控制速度所致,对于电压闪变的治理效果不理想。 Because of such a device for controlling the speed caused by the voltage control flicker effect is not ideal. 同时存在其功率损耗较大,电流—电压特性不好等不足。 While the presence of a large power loss, the current - voltage characteristics is not good enough. 国内电网的控制手段缺乏且水平较低,安装在电网中的绝大部分是提供静态电压调节和补偿无功的电容和变压器分接头调节,它是限制电力传输的重要因素,也是可能发生电力系统崩溃的潜在隐患,如:传统可控装置的固有时间常数都在百毫秒级,不能对时间极短的暂态过程做出有效反映及连续调节;传统控制系统设计的目标是局部或短期的,随着系统的扩大,不能对变化和复杂的控制对象做出全局的正确判断,由于电力系统的扩大,增加了发生事故及误操作、误处理的可能性,造成故障的后果就更加严重了。 The lack of means of control and low levels of domestic grid, installed in the vast majority of the grid is to provide static voltage regulation and reactive power compensation capacitors and transformer tap adjustment, it is an important factor limiting the power transmission, power system also may occur the collapse of the potential risk, such as: the inherent time constant of the conventional apparatus are controllable hundred milliseconds, can not make a very short time to effectively reflect the transient process and a continuous adjustment; conventional control system design objective is local or short-term, with the expansion of the system, can not make changes and complex control objects in the global right to judge, due to the expansion of the power system, increased accidents and misuse, mishandling of the possibility, consequences of failure is even more serious. 另一方面,由于现代电力电子技术日新月异的发展,新型大功率高耐压、快速关断电力电子器件的出现,随之产生了柔性交流输电技术,这是国际电工界90年代以来竞相发展的前沿高技术,是用现代化大功率电力电子技术和控制技术改造传统的交流输电系统,使其运行更加安庆可靠经济,使传统的交流输电系统具有更高的柔性和灵活性、使输电线路得到充分利用,以满足电力系统安全、可靠和经济运行的目标。 On the other hand, due to the power of modern electronic technology the rapid development of new high-power high-voltage, fast turn-off of power electronic devices, will produce flexible AC transmission technology, which is the forefront of the International Electrotechnical industry since the 1990s race to develop high-tech, with modern high-power power electronics and control technology to transform traditional AC transmission system to run more reliable economic Anqing, the traditional AC transmission systems with higher flexibility and agility, making full use of transmission lines to meet the power system security, reliable and economic operation of the target. 自从美国电力科学研究院(EPRI)NGHingorani博士于1986年提出柔性交流输电技术概念以来,柔性交流输电技术就得到了极大的发展,并出现了多种柔性交流输电技术设备,可控串联补偿、静态补偿器(STATCOM/ASVG)是最具代表性的一种,但美、日、德等几个国家开发出的无功功率发生器装置均不是混合型的。 Since Dr. US Electric Power Research Institute (EPRI) NGHingorani proposed the concept of flexible AC transmission technology in 1986, FACTS get a great development, and the emergence of multiple FACTS devices, thyristor controlled series compensation, static compensator (STATCOM / ASVG) is the most representative one, but the reactive power generator device United States, Japan, Germany and other developed countries are not hybrid.

发明内容 SUMMARY

本发明混合型无功功率发生器应用于电力系统中,可使无功功率及电压具有的强有力支撑,保证电网的安全与经济合理运行,用于用户端改善电能质量、解决电弧炉及电气化铁路系统产生的电压波动、闪变及不对称运行所产生的危害,解决轧钢机、卷扬机冲击负荷所引起的电网电压畸变,以及高次谐波电流对电网的污染,以改善电能质量,提高产品质量。 Hybrid generator according to the present invention, reactive power is applied to the power system, can support a strong voltage and the reactive power has to ensure the safe and economic operation of the grid and reasonable for the client to improve the power quality, and to solve the electric arc furnace railway system voltage fluctuation generated flicker and the generated running asymmetric hazards solve rolling mill, due to the impact load hoist grid voltage distortion, and the higher harmonic current pollution on the grid, to improve the power quality, improve product quality.

本发明混合型无功功率发生器内容简述:本发明混合型无功功率发生器,是由无功功率发生器和滤波器两部分组成,根据所需补偿容量确定,其特征在于:无功功率发生器由启动整流器、GTO逆变桥、直流电容器组、逆变器输出变压器、连接变压器、高压开关柜、控制单元、检测单元、保护单元及冷却系统等组成。 Hybrid generator reactive power Description of the present invention: The present invention is a mixed type reactive power generator, is composed of two parts of reactive power generator and a filter which is determined according to the desired compensation capacity, wherein: Reactive starting the power generator by the rectifier, the GTO inverter bridge, a DC capacitor bank, an inverter output transformer connected to the transformer, high voltage switchgear, the control unit, detecting unit, the protection unit and cooling system components.

逆变器输出变压器和连接变压器的漏抗使混合型无功功率发生器与系统连接电抗;电压逆变器输出相位与幅值均可以调节对称基频三相正弦交流电压;可以与系统交换有功功率或无功功率;没有功率消耗的无功功率发生器通过改变其输出电压的幅值实现与交流系统交换无功功率;当输出电压的幅值大于系统电压幅值时,输出滞后的无功功率;当输出电压的幅值小于系统电压幅值时,吸收滞后的无功功率起电抗器的作用;当输出电压的幅值与系统电压幅值相等时,与交流系统之间将没有无功功率的交换。 Leakage reactance of the inverter output transformer connected to the transformer and mixing type reactive power generator connected to the reactor system; inverter output voltage amplitude and phase can be adjusted symmetrical three-phase sinusoidal AC voltage fundamental frequency; Active exchange system power or reactive power; no power is consumed reactive power generator and AC system to achieve the reactive power exchanged by changing the magnitude of the output voltage; when the system is greater than the magnitude of the output voltage of the voltage amplitude, the output lagging reactive power; when the magnitude of the output voltage is less than the amplitude of the system voltage, the reactive power absorbed hysteresis acts reactor; when the output voltage is equal to the magnitude of the amplitude of the system voltage, there will be no reactive power exchange between the system and exchange power.

控制器输入电源母线电压及干扰性负荷的三相电流为被补偿对象,经过矢量变换将干扰性负荷的三相电流iLa、iLb、iLc变换成id、iq,将id分解为id=ld+id~,经过数字滤波器滤除的直流分量ld,保留id的交流分量id~,将和id~和iq作为被补偿的无功电流变量;电流控制电路实时跟踪补偿电流的指令值,并对逆变器的输出电流iFa、iFb、iFc加以反馈控制,经由PWM控制电路控制逆变器IGCT的通断。 Input power source voltage and the bus controller of the interference load is compensated for the three-phase current through the load vector transformation of phase currents interfering iLa, iLb, iLc converted to id, IQ, will be decomposed into id id = ld + id ~, after the digital filter to filter out the DC component ld, retaining the AC component id ~ id, and the id - iq and reactive current as a variable to be compensated; real-time tracking control circuit current command compensation current value, and an inverse 's output current becomes iFa, IFB, IFC be feedback controlled via a PWM control circuit for controlling the inverter IGCT-off.

系统为三相基波正序系统,有效值为Vs,逆变器输出电压为正序系统,有效值为V1,当Vs领先V1相角δ,则输出无功功率为Qs=(Vs/2r)*sim2δ,式中r为损耗的等值电阻,采用脉冲幅值调制时,控制器输出控制量为δ,且直流电压随输出无功功率的大小变化。 Positive-phase-sequence system fundamental system, the effective value Vs, the inverter output voltage is positive sequence system, the effective value V1, when the phase angle [delta] V1 leading Vs, the output reactive power Qs = (Vs / 2r ) * sim2δ, where r is the equivalent resistance losses, when using pulse amplitude modulation, the controller outputs a control amount [delta], and the DC output voltage with the change in the magnitude of reactive power.

脉冲发生器采用系统电压的基波正序分量作为同步信号,并经过同步增长信号处理电路得到同步电压过零信号,在各相的过零信号出现时刻,开始发出相应的PWM波形;同步信号的产生采用过零同步,即对系统三相电压信号进行处理后取出一相基波正序电压作为同步信号,当该同步信号过零时作为脉冲发生器脉冲的同步点,同时通过测量2个正向或负向过零点之间的时间作为周期计算出同步信号的频率。 The pulse generator system employing voltage fundamental positive sequence component as a synchronization signal, and the signal processing circuit through the simultaneous increase in the voltage zero crossing signal are synchronized, the timing of each phase of the zero crossing signal occurred, began to issue a corresponding PWM waveform; synchronization signal after generating synchronization zero-crossing, i.e. the three-phase system voltage phase signal is processed out a fundamental positive sequence voltage as a synchronization signal, the synchronization signal when the zero crossing point as a synchronization pulse generator pulse, by measuring simultaneously two n to negative or zero over the time between the calculated frequency synchronization signal of period.

本发明混合型无功功率发生器使用直流电容维持稳定的直流电源,具有容量小、成本低、输出电压谐波含量小的特点。 Hybrid generator according to the present invention, reactive power using the DC capacitor maintain a stable DC power source, having a small capacity, low cost, small harmonic content of the output voltage characteristics. 可以从额定滞后工况到额定超前工况连续调节输出无功,在系统电压很低的情况下,仍能输出额定无功电流,对提供稳态负载的无功支持可比静止型无功功率补偿器容量小15~30%。 May be continuously adjusted from the nominal lag reactive power output conditions leading up to the rated operating conditions, the system at low voltage, the reactive current can still rated output, for providing a steady state load reactive support than the static reactive power compensation small capacity of 15 to 30%. 混合型无功功率发生器有更快的动态响应速冻度响应时间小于30ms在抑制系统的功率震荡和提高系统稳定性方面有最好的效果,每kvar的输出约能提高0.5~0.7kv的暂态稳定极限值。 Mixed reactive power generator has a faster dynamic response of frozen Temporarily response time of less than 30ms the best results in terms of power and improve system stability oscillation suppression system, the output of each kvar about 0.5 ~ 0.7kv to improve the steady-state limit. 具有动态的维持输电线路端电压,提高输电线路稳态传输功率极限、提高电力系统暂态稳定水平、阻尼电力系统震荡、抑制系统过电压、改善系统电压稳定性、滤掉系统中的谐波含量的作用。 Dynamic sustain voltage transmission line, transmission line steady increase transmit power limit, improve power system transient stability, oscillation damping power system, the overvoltage suppression system to improve voltage stability, filtered harmonic content system role. 可应用于电力系统中,起到无功功率及电压的强有力支撑的作用,保证电网的安全与经济合理运行,又可用于用户端改善电能质量、解决电弧炉及电气化铁路系统产生的电压波动、闪变及不对称运行所产生的危害,解决轧钢机、卷扬机冲击负荷所引起的电网电压畸变,以及高次谐波电流对电网的污染,以改善电能质量和提高产品质量。 May be applied to the power system, reactive power play a strong supporting role and voltage, to ensure reasonable safety and economic operation of the grid, but also improve the power quality for the UE, to solve voltage fluctuation and electric arc generated by the electrified railway systems , and the flicker generated by operation of asymmetry hazards solve rolling mill, due to the impact load hoist grid voltage distortion, and the higher harmonic current grid contamination, to improve power quality and improve product quality.

附图说明 BRIEF DESCRIPTION

图1为混合型无功功率发生器构成框图图2为混合型无功功率发生器的工作原理图图3为混合型无功功率发生器的主电路图图4为控制器结构框图图5为脉冲发生器原理框图具体实施方式 本发明混合型无功功率发生器是这样实现的,见图1,混合型无功功率发生是由无功功率发生器及无源滤波器两部分组成,根据所需补偿容量确定,无功功率发生器由启动整流器、GTO逆变柜、直流电容器组、逆变器输出变压器、连接变压器、10KV高压开关柜、控制单元、检测单元、保护单元及冷却装置等组成。 Figure 1 is a hybrid type reactive power generator 2 is a block diagram view of the working principle of hybrid type reactive power generator 3 is a circuit diagram of a main mixing type reactive power generator 4 is a block diagram of the controller of FIG. 5 is a pulse DETAILED DESCRIPTION generator block diagram of the present invention is a mixed type reactive power generator is achieved, in Figure 1, the mixing type reactive power occurs in two parts of reactive power generator and the passive filter which, according to the desired determining the compensation capacity, the reactive power from the generator, the rectifier starts, the GTO inverter cabinet, the DC capacitor bank, an inverter output transformer connected to the transformer, 10KV high voltage switchgear, the control unit, detecting unit, the protection unit and cooling devices and other components. 根据用户所需的补偿容量大小确定两部分的容量。 Determine the capacity of the two parts according to the required compensation capacity size.

1、逆变器输出变压器和连接变压器的漏抗起到混合型无功功率发生器与系统的连接电抗的作用。 1, a drain connected to the inverter output transformer and the transformer functions as an anti-hybrid reactance connected reactive power generator and system.

2、电压逆变器输出相位与幅值均可以调节对称基频三相正弦交流电压,从而可以与系统交换有功功率或无功功率。 2, the inverter output voltage amplitude and phase can be adjusted symmetrical three-phase sinusoidal AC voltage fundamental frequency, can be active or reactive power exchange with the system.

3、对于理想的混合型无功功率发生器(即没有功率消耗)可以改变其输出电压的幅值实现与交流系统交换无功功率。 3, for an ideal mixing type reactive power generator (i.e., no power consumption) may change its output voltage amplitude of the AC system to achieve reactive power exchange.

4、当混合型无功功率发生器输出电压的幅值大于系统电压幅值时,混合型无功功率发生器输出滞后的无功功率,起着电容器的作用。 4, when the amplitude of the mixed reactive power generator output voltage is greater than the system voltage magnitude hybrid generator output reactive power lagging reactive power plays capacitor.

5、当混合型无功功率发生器输出电压的幅值小于系统电压幅值时,混合型无功功率发生器吸收滞后的无功功率,起电抗器的作用。 5 reactive power, when the amplitude of the mixed reactive power generator output voltage is less than the amplitude of the system voltage, the generator reactive power hybrid absorption lag, since the effect of the reactor.

6、当混合型无功功率发生器输出电压的幅值与系统电压幅值相等时,混合型无功功率发生器与交流系统之间将没有无功功率的交换。 6, when the hybrid is equal to the reactive power generator output voltage amplitude and voltage amplitude system, there will be no reactive power exchange between the mixing type reactive power generator and AC system.

见图2,控制器输入电源母线电压及干扰性负荷的三相电流为被补偿对象,经过矢量变换将干扰性负荷的三相电流iLa、iLb、iLc变换成id、iq,将id分解为id=1d+id~,经过数字滤波器滤除的直流分量ld,保留id的交流分量id~,将和id~和iq作为被补偿的无功电流变量;电流控制电路实时跟踪补偿电流的指令值,并对逆变器的输出电流iFa、iFb、iFc加以反馈控制,经由PWM控制电路控制逆变器IGCT的通断。 See FIG. 2, the bus controller input voltage and three-phase current supply as being interfering compensated load, after the load vector transformation of phase currents interfering iLa, iLb, iLc converted to id, IQ, will be decomposed into id id = 1d + id ~, after the digital filter to filter out the DC component ld, retaining the AC component id id ~, the ~ id and iq and reactive current as a variable to be compensated; real-time tracking control current command value of compensation current circuit , and to be an output current of the inverter iFa, IFB, IFC feedback control, the control circuit via the PWM control of the inverter IGCT-off.

系统为三相基波正序系统,有效值为Vs,逆变器输出电压为正序系统,有效值为V1,当Vs领先V1相角δ,则输出无功功率为Qs=(Vs/2r)*sim2δ,式中r为损耗的等值电阻,采用脉冲幅值调制时,控制器输出控制量为δ,且直流电压随输出无功功率的大小变化。 Positive-phase-sequence system fundamental system, the effective value Vs, the inverter output voltage is positive sequence system, the effective value V1, when the phase angle [delta] V1 leading Vs, the output reactive power Qs = (Vs / 2r ) * sim2δ, where r is the equivalent resistance losses, when using pulse amplitude modulation, the controller outputs a control amount [delta], and the DC output voltage with the change in the magnitude of reactive power.

见图3,混合型无功功率发生器是以多重化变压器为例,4个三相逆变桥连接1个三相铁心柱式变压器,变压器系统则采用4重化yd接线,采用他励或半自励方式启动。 Shown in Figure 3, the hybrid type reactive power generator is multiplexed transformer, for example, four-phase inverter bridge connected to a three-phase transformer core column, the system uses the transformer 4 yd weight of wiring, using the separately-excited or start self-excited half way. 他励启动时,先由一台整流变压器为系统提供空载励磁,当输出电压的幅值及相位与系统电压相同时,合并网主开关,同时切断整流器输出;当半自励方式启动时,先封锁所有GTO驱动脉冲。 He started excited, first by providing a no-load excitation rectifier transformer as a system, when the amplitude and phase of the system voltage and the output voltage are the same, merging the primary network switch and cut off the output of the rectifier; self-excited when the half way to start, first block all GTO drive pulse. 将直流电压由整流器升高至零无功工作电压然后并网,此时冲击电流很小,并网后即可解除脉冲封锁,混合型无功功率发生器投入运行,半自励方式启动只需很小容量的整流器。 DC rectifier voltage is increased to zero by the operating voltage and reactive power grid, then the inrush current is very small, and can be discharged after the pulse suppression networks, hybrid type reactive power generator into operation, only half way to start the self-excited rectifier small capacity.

见图4,控制器产生一定规律的触发脉冲,经门极驱动电路放大后去控制GTO的导通和关断,使混合型无功功率发生器产生正确的阶梯波电压,根据从电网取回的同步脉冲,产生出与电网电压同步的脉冲信号,使混合型无功功率发生器产生的阶梯波电压与电网电压保持同步,从而使混合型无功功率发生器能正确并网运行。 Figure 4, the controller generates a trigger pulse of a certain law, after the gate drive circuit to control the amplification of the GTO is turned off and the reactive power of the hybrid step wave generator generates the correct voltage, based on the retrieved from the grid sync pulse, produces a pulse signal synchronized with the grid voltage of the hybrid type reactive power generator staircase wave voltage synchronized with the grid voltage, so that the hybrid type reactive power generator can be correctly and network operation.

控制器采用双机热备用结构,当1台故障时,切换电路自动切换至备用机运行,从而提高系统的连续运行能力;2台控制器均可运行于恒无功方式和恒电压放肆,其采样、控制计算及脉冲发生器均采用基于32位数字信号处理器(DSP)TMS320C31的高速数字控制方式,脉冲发生器的相位精度高达0.025°,使无功功率的控制精度及稳定性得到保证。 The controller configuration with hot standby, when a station fails, the switching circuit is automatically switched to the standby machine is running, thus improving its ability to operate continuously; 2 controllers can run at constant voltage and constant reactive unbridled way that sampling pulse generator and control calculations are based 32-bit digital signal processor (DSP) TMS320C31 digital control of high-speed, high phase accuracy pulser 0.025 °, accuracy and stability of the control of reactive power is ensured.

见图5,脉冲发生器是混合型无功功率发生器的关键技术,对控制精度及稳定性的影响非常大。 Figure 5, the pulse generator is a hybrid generator reactive power key techniques, influence on the control accuracy and stability is very large. 采用系统电压的基波正序分量作为同步信号,并经过同步增长信号处理电路得到同步电压过零信号,在各相的过零信号出现时刻,开始发出相应的PWM波形;同步信号的产生采用过零同步,即对系统三相电压信号进行处理后取出一相基波正序电压作为同步信号,当该同步信号过零时作为脉冲发生器脉冲的同步点,同时通过测量2个正向或负向过零点之间的时间作为周期计算出同步信号的频率。 System employing voltage fundamental positive sequence component as a synchronization signal, and after a simultaneous increase in the signal processing circuit to obtain zero-voltage synchronization signal occurs at the moment the zero crossing signal of the respective phases, PWM waveform corresponding start to issue; generating a synchronization signal through the use of null sync, the three-phase voltage system that is extracted signal is processed with a fundamental positive sequence voltage as a synchronization signal, the synchronization signal when the zero crossing point as a synchronization pulse generator pulse, by measuring simultaneously two positive or negative calculate the frequency synchronization signal as the time period between zero crossings.

Claims (3)

1.一种混合型无功功率发生器,是由无功功率发生器和滤波器两部分组成,根据所需补偿容量确定,其特征在于:无功功率发生器由启动整流器、GTO逆变桥、直流电容器组、逆变器输出变压器、连接变压器、高压开关柜、控制单元、检测单元、保护单元及冷却系统等组成;逆变器输出变压器和连接变压器的漏抗使混合型无功功率发生器与系统连接电抗;电压逆变器输出相位与幅值均可以调节对称基频三相正弦交流电压;可以与系统交换有功功率或无功功率;没有功率消耗的无功功率发生器通过改变其输出电压的幅值实现与交流系统交换无功功率;当输出电压的幅值大于系统电压幅值时,输出滞后的无功功率;当输出电压的幅值小于系统电压幅值时,吸收滞后的无功功率起电抗器的作用;当输出电压的幅值与系统电压幅值相等时,与交流系统之间将 1. A hybrid generator reactive power, the reactive power by the generator and a filter composed of two parts, is determined according to the desired compensation capacity, wherein: the reactive power generator by the startup of the rectifier, the GTO inverter bridge DC capacitor bank, an inverter output transformer connected to the transformer, high voltage switchgear, the control unit, detecting unit, the protection unit and cooling system components; leakage reactance of the inverter output transformer connected to the transformer and mixing type reactive power generation is connected to the system reactance; inverter output voltage amplitude and phase can be adjusted symmetrical three-phase sinusoidal AC voltage fundamental frequency; may be active or reactive power exchange with the system; no power consumption of reactive power by changing the generator the magnitude of the output voltage of the AC system to achieve reactive power exchange; when the system is greater than the magnitude of the output voltage of the voltage amplitude, the output lagging reactive power; when the magnitude of the output voltage is less than the amplitude of the system voltage, the absorption lag when the values ​​of the output voltage between the magnitude of the amplitude of the system voltage, and the AC system; reactive power from the reactor effect 有无功功率的交换;控制器输入电源母线电压及干扰性负荷的三相电流为被补偿对象,经过矢量变换将干扰性负荷的三相电流iLa、iLb、iLc变换成id、iq,将id分解为id=ld+id~,经过数字滤波器滤除的直流分量1d,保留id的交流分量id~,将和id~和iq作为被补偿的无功电流变量;电流控制电路实时跟踪补偿电流的指令值,并对逆变器的输出电流iFa、iFb、iFc加以反馈控制,经由PWM控制电路控制逆变器IGCT的通断;系统为三相基波正序系统,有效值为Vs,逆变器输出电压为正序系统,有效值为V1,当Vs领先V1相角6,则输出无功功率为Qs=(Vs/2r)*sim2δ,式中r为损耗的等值电阻,采用脉冲幅值调制时,控制器输出控制量为δ,且直流电压随输出无功功率的大小变化;脉冲发生器采用系统电压的基波正序分量作为同步信号,并经过同步增长信号处理电路得到同步电压过零 Active and reactive power exchange; controller input supply voltage bus and the load three-phase current of interference to be compensated, through vector transformation of the three-phase current load interfering iLa, iLb, iLc converted to id, IQ, the id decomposition id = ld + id ~, through the digital filter to filter out the DC component of 1d, the AC component remains id id ~, a ~ id and iq and reactive current as a variable to be compensated; real-time tracking compensation current control circuit current command value, and feedback controlling the output current to be iFa inverter, IFB, IFC, IGCT controlling the inverter on and off via the PWM control circuit; fundamental positive sequence system is a three-phase system, the effective value Vs of the, reverse varying the output voltage of the positive sequence system, the effective value of V1, V1-phase lead angle when Vs 6, the output of the reactive power Qs = (Vs / 2r) * sim2δ, where r is the equivalent resistance loss, pulse when amplitude modulation, the controller outputs a control amount [delta], and the DC voltage with the output magnitude of the change of reactive power; voltage pulse generator system employing fundamental positive sequence component as a synchronization signal, and the synchronized signal processing circuit is synchronized growth voltage zero 号,在各相的过零信号出现时刻,开始发出相应的PWM波形;同步信号的产生采用过零同步,即对系统三相电压信号进行处理后取出一相基波正序电压作为同步信号,当该同步信号过零时作为脉冲发生器脉冲的同步点,同时通过测量2个正向或负向过零点之间的时间作为周期计算出同步信号的频率。 Number, time of each zero crossing of the phase signal occurs, starts to issue the corresponding PWM waveform; generating a synchronization of the zero-crossing synchronization signal, i.e., the three-phase system with a voltage signal is taken as the fundamental positive sequence voltage after the synchronous signal processing, when the synchronization signal as a synchronization point zero crossing pulse generator pulse, by measuring simultaneously two positive or negative over the time between zero period is calculated as a frequency synchronization signal.
2.根据权利要求1所述的混合型无功功率发生器,其特征在于所说的混合型无功功率发生器是以多重化变压器为例,4个三相逆变桥连接1个三相铁心柱式变压器,变压器系统则采用4重化yd接线,采用他励或半自励方式启动;他励启动时,先由一台整流变压器为系统提供空载励磁,当输出电压的幅值及相位与系统电压相同时,合并网主开关,同时切断整流器输出;当半自励方式启动时,先封锁所有GTO驱动脉冲;将直流电压由整流器升高至零无功工作电压然后并网,此时冲击电流很小,并网后即可解除脉冲封锁,混合型无功功率发生器投入运行,半自励方式启动只需很小容量的整流器。 According to claim hybrid type reactive power generator of claim 1, wherein said hybrid type reactive power generator is multiplexed transformer, for example, four-phase inverter bridge connected to a three-phase column core transformer, the transformer system is used a weight of 4 yd wiring, using semi-self-excited or separately-excited mode starts; he excited start, first by a rectifier transformer to provide excitation to the system load, and when the magnitude of the output voltage phase of the system voltage is the same, the main switch merge network, while cutting off the output of the rectifier; self-excited half-way when starting, a driving pulse to block all GTO; DC rectifier voltage is increased to zero by the operating voltage and reactive power grid, this when the inrush current is very small, and can be discharged after the pulse suppression networks, hybrid type reactive power generator is put into operation, only half way to start the self-excited converter of a small capacity.
3.根据权利要求1所述的混合型无功功率发生器,其特征在于所说的混合型无功功率发生器的控制器产生一定规律的触发脉冲,经门极驱动电路放大后去控制GTO的导通和关断,使混合型无功功率发生器产生正确的阶梯波电压,根据从电网取回的同步脉冲,产生出与电网电压同步的脉冲信号,使混合型无功功率发生器产生的阶梯波电压与电网电压保持同步,从而使混合型无功功率发生器能正确并网运行。 According to claim hybrid type reactive power generator of claim 1, wherein said hybrid controller reactive power generator generates a trigger pulse of a certain law, after the gate drive circuit to control the amplification GTO turn-on and turn-off, so that the reactive power hybrid step wave generator generates the correct voltage, the synchronization pulses retrieved from the grid, generating a pulse signal synchronized with the grid voltage, mixing type reactive power generator staircase wave voltage synchronized with the grid voltage, so that the hybrid type reactive power generator can be correctly and network operation.
CN 02109022 2002-01-11 2002-01-11 Mixing type reactive power generator CN1359183A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101142731B (en) 2005-02-23 2011-12-07 歌美飒创新技术公司 Method and apparatus for injecting reactive current during a mains supply voltage sag
CN102891494A (en) * 2011-07-19 2013-01-23 Zbb能源公司 Method and apparatus for controlling a hybrid power system
CN102308452B (en) 2009-01-16 2013-06-12 Zbb能源公司 Method and apparatus for controlling a hybrid power system
CN104052067A (en) * 2014-05-30 2014-09-17 安徽三和电力技术有限公司 Hybrid reactive power generating device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101142731B (en) 2005-02-23 2011-12-07 歌美飒创新技术公司 Method and apparatus for injecting reactive current during a mains supply voltage sag
CN102308452B (en) 2009-01-16 2013-06-12 Zbb能源公司 Method and apparatus for controlling a hybrid power system
CN102891494A (en) * 2011-07-19 2013-01-23 Zbb能源公司 Method and apparatus for controlling a hybrid power system
CN102891494B (en) * 2011-07-19 2016-08-17 安辛可公司 For the method and apparatus controlling hybrid power system
CN104052067A (en) * 2014-05-30 2014-09-17 安徽三和电力技术有限公司 Hybrid reactive power generating device

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