新型并联混合型有源电力滤波器关键技术的研究
发布时间：2018-09-07 11:07
【摘要】：电能是国民经济和人民生活的命脉,而我国企业电能损失逐年增加。我国高耗能企业众多,随着钢铁、有色、石化等行业飞速发展,能源消耗总量大。随着电力电子技术的飞速发展,各种大功率开关器件得到了广泛应用,非线性负载大量增加。它们造成电网的谐波污染和电能损失；同时冲击性负载及无功补偿不足常引起电网电压跌落和闪变,并导致线路损耗增加。这些问题影响了企业的正常生产和人民的日常生活,给我国电力系统带来了繁重的无功控制和谐波治理问题。使我国的可持续发展面临巨大压力。 本文深入研究了新型并联混合型有源电力滤波器的相关理论和方法。研究内容涵盖了新型并联混合型有源电力滤波器的工作机理分析、控制策略、补偿性能,及提出了新的控制算法；提出了对应的容错结构,形成了较为完善的容错并联混合型有源电力滤波器的基本研究方法和技术方案,研究重点及取得的成果主要体现在以下几个方面： (1)提出了一种新型并联混合型有源电力滤波器的结构,该补偿装置不但可以补偿电网谐波,还能根据现场具体情况补偿无功功率而不发生大量无功过补的情况。分析了该补偿装置的补偿原理；研究了新型并联混合型有源电力滤波器的控制策略,确定了将有源部分控制为谐波电流源；设计了新型并联混合型有源电力滤波器的注入支路,分析了本章所选注入支路的原因；给出了新型并联混合型有源电力滤波器在电网参数发生变化的情况下,该补偿装置的补偿性能。 (2)提出了并联混合型有源电力滤波器的基于隶属云理论的复合-递推积分PI控制方法。复合控制包括前馈控制、反馈控制和直流侧电压控制。5次无源滤波器滤除最严重的谐波分量,前馈控制负责滤除负载产生的7次谐波分量,反馈控制负责滤除剩余的少量谐波分量,公共点谐波电压控制负责稳定直流侧电压。采用隶属云模型对递推积分PI的比例系数和积分系数进行在线调整。基于隶属云理论的递推积分PI控制算法使系统在电流跟踪偏差较大时比例控制占主导,偏差减小速度较快,在偏差减小到一定范围内时积分控制占主导,实现稳态无差,使得系统的响应速度、鲁棒性和抗干扰能力得到提高。 (3)提出了新型并联混合型有源电力滤波器的容错结构。首先分析了容错结构原理,给出了故障情况下的几种运行模式和运行原理。研究了基于误差电压的故障诊断方法。基于误差电压的故障诊断方法直接利用逆变器的电压模型,通过逆变器中电压测量值与估计值之间的误差来诊断故障。 (4)针对新型并联混合型有源电力滤波器的容错结构,提出了基于维隶属云模型的增量式PID控制算法,利用二维隶属云模型对增量式PID控制的比例系数、积分系数和微分系数进行在线调整。对二维隶属云模型的参数调整算法中各个变量的隶属云生成进行了改进,并改进了规则推理器。 (5)为了进一步提高控制器的性能,提出了直接控制的三维隶属云智能控制。该控制算法参照PID控制算法的思想,但和PID控制算法有本质的不同。三维隶属云智能控制器控制效果良好、鲁棒性强,并且不依赖被控对象的数学模型,而是根据操作经验或专家知识直接进行三维云模型控制器设计。三维隶属云智能控制策略简明,无需冗繁的推理计算,通用性强。能够直接实现定量输入、并行定性推理、定量输出的控制过程,计算量较小,实时性强。 本文以配电网电能质量控制、提高并联混合型有源电力滤波器运行安全性能为背景,研究了新型并联混合型有源电力滤波器及其关键技术,为推进电力电子系统的实用化进程提供有益的参考和借鉴。图59幅,表10个,参考文献100篇
[Abstract]:Electric energy is the lifeblood of the national economy and people's life, and the loss of electric energy in our country's enterprises is increasing year by year. There are many high-energy-consuming enterprises in our country. With the rapid development of steel, non-ferrous, petrochemical and other industries, the total energy consumption is large. With the rapid development of power electronics technology, various high-power switching devices have been widely used, and the nonlinear load has increased greatly. These problems affect the normal production of enterprises and people's daily life, and bring heavy problems of reactive power control and harmonic control to our power system. The sustainable development of our country is facing enormous pressure.
In this paper, the theory and method of the new shunt hybrid active power filter are deeply studied. The research contents include the analysis of the working mechanism, control strategy, compensation performance and new control algorithm of the new shunt hybrid active power filter. The corresponding fault-tolerant structure is proposed, and a more perfect fault-tolerant shunt is formed. The basic research methods and technical schemes of hybrid active power filter, the research emphasis and achievements are mainly reflected in the following aspects:
(1) A new structure of shunt hybrid active power filter is proposed, which can not only compensate the harmonics of power grid, but also compensate reactive power according to the actual situation without a large number of reactive power overcompensation. The compensation principle of the compensation device is analyzed, and a new shunt hybrid active power filter is studied. The control strategy determines that the active part is controlled as the harmonic current source; the injection branch of the new shunt hybrid active power filter is designed, and the reasons of the injection branch are analyzed; the compensating ability of the new shunt hybrid active power filter is given when the network parameters change. Yes.
(2) A compound-recursive integral PI control method based on membership cloud theory for shunt hybrid active power filter is proposed. The compound control includes feed-forward control, feedback control and DC-side voltage control. The 5th order passive filter filters out the most serious harmonic component, the feedforward control filters out the 7th harmonic component generated by the load and the feedback control negative. The membership cloud model is used to adjust the proportional and integral coefficients of the recursive integral PI. The recursive integral PI control algorithm based on the membership cloud theory makes the proportional control dominate and the bias decrease when the current tracking deviation is large. Integral control is dominant when the deviation is reduced to a certain range and steady-state error-free is achieved, which improves the response speed, robustness and anti-jamming ability of the system.
(3) A novel fault-tolerant structure of shunt hybrid active power filter is proposed. Firstly, the principle of fault-tolerant structure is analyzed, several operation modes and operation principles under fault conditions are given. The fault diagnosis method based on error voltage is studied. The fault diagnosis method based on error voltage directly utilizes the voltage model of inverter and inverts it. The error between the voltage measurement value and the estimated value in the converter is used to diagnose the fault.
(4) Aiming at the fault-tolerant structure of the novel shunt hybrid active power filter, an incremental PID control algorithm based on the dimension membership cloud model is proposed. The proportional coefficient, integral coefficient and differential coefficient of the incremental PID control are adjusted online by using the two-dimensional membership cloud model. The membership cloud generation is improved and the rule inference device is improved.
(5) In order to further improve the performance of the controller, a direct control of the three-dimensional membership cloud intelligent control is proposed. The control algorithm refers to the idea of PID control algorithm, but is essentially different from PID control algorithm. Three-dimensional membership cloud intelligent control strategy is concise, does not need tedious reasoning calculation, and has strong versatility. It can directly achieve quantitative input, parallel qualitative reasoning, quantitative output control process, less computation, real-time.
Based on the power quality control of distribution network and the improvement of operation safety performance of shunt hybrid active power filter, this paper studies the new shunt hybrid active power filter and its key technologies, which can provide useful reference for promoting the practical process of power electronic system.
【学位授予单位】：中南大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TM761
本文编号：2228087
[Abstract]:Electric energy is the lifeblood of the national economy and people's life, and the loss of electric energy in our country's enterprises is increasing year by year. There are many high-energy-consuming enterprises in our country. With the rapid development of steel, non-ferrous, petrochemical and other industries, the total energy consumption is large. With the rapid development of power electronics technology, various high-power switching devices have been widely used, and the nonlinear load has increased greatly. These problems affect the normal production of enterprises and people's daily life, and bring heavy problems of reactive power control and harmonic control to our power system. The sustainable development of our country is facing enormous pressure.
In this paper, the theory and method of the new shunt hybrid active power filter are deeply studied. The research contents include the analysis of the working mechanism, control strategy, compensation performance and new control algorithm of the new shunt hybrid active power filter. The corresponding fault-tolerant structure is proposed, and a more perfect fault-tolerant shunt is formed. The basic research methods and technical schemes of hybrid active power filter, the research emphasis and achievements are mainly reflected in the following aspects:
(1) A new structure of shunt hybrid active power filter is proposed, which can not only compensate the harmonics of power grid, but also compensate reactive power according to the actual situation without a large number of reactive power overcompensation. The compensation principle of the compensation device is analyzed, and a new shunt hybrid active power filter is studied. The control strategy determines that the active part is controlled as the harmonic current source; the injection branch of the new shunt hybrid active power filter is designed, and the reasons of the injection branch are analyzed; the compensating ability of the new shunt hybrid active power filter is given when the network parameters change. Yes.
(2) A compound-recursive integral PI control method based on membership cloud theory for shunt hybrid active power filter is proposed. The compound control includes feed-forward control, feedback control and DC-side voltage control. The 5th order passive filter filters out the most serious harmonic component, the feedforward control filters out the 7th harmonic component generated by the load and the feedback control negative. The membership cloud model is used to adjust the proportional and integral coefficients of the recursive integral PI. The recursive integral PI control algorithm based on the membership cloud theory makes the proportional control dominate and the bias decrease when the current tracking deviation is large. Integral control is dominant when the deviation is reduced to a certain range and steady-state error-free is achieved, which improves the response speed, robustness and anti-jamming ability of the system.
(3) A novel fault-tolerant structure of shunt hybrid active power filter is proposed. Firstly, the principle of fault-tolerant structure is analyzed, several operation modes and operation principles under fault conditions are given. The fault diagnosis method based on error voltage is studied. The fault diagnosis method based on error voltage directly utilizes the voltage model of inverter and inverts it. The error between the voltage measurement value and the estimated value in the converter is used to diagnose the fault.
(4) Aiming at the fault-tolerant structure of the novel shunt hybrid active power filter, an incremental PID control algorithm based on the dimension membership cloud model is proposed. The proportional coefficient, integral coefficient and differential coefficient of the incremental PID control are adjusted online by using the two-dimensional membership cloud model. The membership cloud generation is improved and the rule inference device is improved.
(5) In order to further improve the performance of the controller, a direct control of the three-dimensional membership cloud intelligent control is proposed. The control algorithm refers to the idea of PID control algorithm, but is essentially different from PID control algorithm. Three-dimensional membership cloud intelligent control strategy is concise, does not need tedious reasoning calculation, and has strong versatility. It can directly achieve quantitative input, parallel qualitative reasoning, quantitative output control process, less computation, real-time.
Based on the power quality control of distribution network and the improvement of operation safety performance of shunt hybrid active power filter, this paper studies the new shunt hybrid active power filter and its key technologies, which can provide useful reference for promoting the practical process of power electronic system.
【学位授予单位】：中南大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TM761
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