System and control method with harmonic voltage generation and zip dummy load
A virtual load and harmonic voltage technology, applied to harmonic reduction devices, AC networks to reduce harmonics/ripples, electrical components, etc., can solve the problem of not taking into account the fundamental wave foundation of the load model system that includes harmonic voltages Issues such as comprehensiveness and the inability to realize load on-site consumption can achieve the effect of improving completeness and reliability
Active Publication Date: 2019-09-10
HEFEI UNIV OF TECH
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Problems solved by technology
[0007] 1. The establishment of the load model cannot simulate the local load in the power system, let alone realize the function of local load consumption;
[0008] 2. Most of the load model systems are not comprehensive enough based on the fundamental wave, and the situation including harmonic voltage is not considered. However, the existence of harmonic voltage in the power system is extensive and needs to be included in the scope of research.
Method used
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Embodiment Construction
[0052] Use Matlab / Simulink simulation platform to build the system model.
[0053] refer to figure 1 , the system with harmonic voltage generation and ZIP virtual load of the present invention includes power grid, three-phase STS static switch, harmonic generation module 20, three-phase series coupled transformer group 30 and ZIP virtual load module 40; The harmonic generation module 20 includes a DC source 21, a three-phase three-level PWM inverter 22, a three-phase LC filter, and a three-phase STS 1 Static switching switch; the ZIP dummy load module 40 includes a capacitor C, a three-phase three-level PWM converter 41, and a three-phase L-shaped filter.
[0054] The three-phase output terminals of the power grid are connected to the input terminals of the three-phase STS static transfer switch in one-to-one correspondence, and the output terminals of the three-phase STS static transfer switch are connected to the secondary side input terminals of the three-phase series coup...
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The invention discloses a system with harmonic voltage generation and ZIP virtual load and a control method, comprising a power grid, a three-phase STS static change-over switch, a harmonic voltage generation module, a three-phase series-coupled transformer and a ZIP virtual load module, wherein the ZIP virtual load outputs voltage and current through an acquisition system and the given external active power and reactive power. Based on the ZIP virtual load algorithm, the establishment of a ZIP virtual load model is realized. The system with harmonic voltage generation and ZIP virtual load and the control method proposed by the invention can simulate the local load of an electric system and realize the function of load consuming on spot. The system and the method can be applied to water pumping and energy storing, photovoltaic self-cleaning, electric vehicles and other various occasions. In addition, the system has a harmonic wave generation function, which makes the system more complete and more reliable.
Description
technical field [0001] The invention belongs to the field of power quality analysis and control, and relates to a system and control method with harmonic voltage generation and ZIP virtual load, which can not only simulate the local load in the power system, but also realize the function of local load consumption. It can be applied to various occasions such as pumped water storage, photovoltaic self-cleaning and electric vehicles. At the same time, the system also has the function of harmonic generation, which improves the completeness and novelty of the system. Background technique [0002] In power systems, characteristics such as voltage amplitude and frequency changes caused by load changes are common phenomena in power systems. For this reason, off-grid operation control needs to start with these basic problems in order to propose reliable and effective solutions. [0003] At present, research on load models in power systems has become a hot topic, such as Chinese inven...
Claims
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IPC IPC(8): H02J3/01H02J3/00
CPCH02J3/00H02J3/01H02J2203/20Y02E40/40
Inventor 张兴朱虹李飞李明吴凡
Owner HEFEI UNIV OF TECH