Harmonic wave dynamic managing and reactive-load dynamic compensation compound control method and implementing device thereof

A composite control and dynamic compensation technology, applied in reactive power adjustment/elimination/compensation, AC network to reduce harmonics/ripple, active power filtering, etc. problems, to achieve the effect of avoiding slow speed, reducing capacity, and reducing costs

Inactive Publication Date: 2008-08-20
HUNAN UNIV
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  • Application Information

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Problems solved by technology

However, the filtering performance of passive power filters is greatly affected by the grid frequency and impedance. Passive filters are composed of large-capacity reactors and capacitors. The whole machine is bulky and expensive.
The existing literature discloses the use of APF to control harmonics, and the use of thyristor switched capacitors (TSC) to compensate capacitive reactive power. The disadvantages are: the capa

Method used

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  • Harmonic wave dynamic managing and reactive-load dynamic compensation compound control method and implementing device thereof
  • Harmonic wave dynamic managing and reactive-load dynamic compensation compound control method and implementing device thereof
  • Harmonic wave dynamic managing and reactive-load dynamic compensation compound control method and implementing device thereof

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Embodiment Construction

[0027] As shown in Figure 1, the bus three-phase voltage u a , u b , u c , the static var compensator output voltage u svc ;Three-phase current i a i b i c ;Static var compensator output current i svc ;Load current i L ;active power filter HAPF output current i HAPF The corresponding small signals are obtained after the detection of the voltage and current transformers respectively. After being sampled by the sampling module, that is, 2 pieces of MAX125 chips with 16 channels in total, they are input to the DSP controller, and the effective value of the fundamental wave of the three-phase voltage V is calculated. 1 , Grid side harmonic current i Sh , load side harmonic current i Lh , TCR harmonic current i tcr . All the collected signals are transmitted to the industrial computer through the RS485 communication module, and displayed in the form of various graphics and curves. The expected grid harmonic current i is given by the input module keyboard in the host com...

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Abstract

The present invention discloses a harmonic dynamic treating and reactive dynamic compensation composite control method and the realizing device, wherein, the realizing device comprises a main device and a control device. The main device comprises a HAPF, a SVC which is composed of a mechanical switching capacitor set that is Y-shape connected and a thyristor control reactor that is delta connected. The control device comprises a voltage and current mutual inductor which are accessed into the sampling module, and a DSP controller, an industrial controlling device, a communication module, a MSC logic control circuit, a RCR admittance-angle calculating module, a PWM signal generating module, and light end transmitter, a light end receiver, and MSC, TCR and HAPF which are lastly accessed into the main device with the insulating and power amplifying circuit. The invention executes dynamic coordination control to the hybrid active electric power wave filter and static reactive compensator, has excellent dynamic and static properties and robustness, and better adaptability.

Description

technical field [0001] The invention belongs to the technical field of control of flexible AC power transmission and distribution systems, and in particular relates to a compound control method of harmonic dynamic control and reactive power dynamic compensation and an implementation device thereof. Background technique [0002] There are a large number of inductive loads in the power transmission and distribution system. These loads will consume a large amount of reactive power in the power distribution system, reduce the power factor of the system, cause increased line voltage loss and power loss, and directly affect the economy of power companies. benefit. In addition, for impact reactive loads such as electric arc furnaces and rolling mills, there will be severe fluctuations in voltage, which will deteriorate the power supply quality of the grid. An effective way to solve these problems is to perform reactive power compensation. Static var compensator (SVC) has been wid...

Claims

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Application Information

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IPC IPC(8): H02J3/01H02J3/18
CPCY02E40/20
Inventor 罗安徐先勇帅智康刘定国罗卓伟杨晓程莹方璐
Owner HUNAN UNIV
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