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11 results on '"Zhuang, Shenglun"'

2. The Equivalent Relationship Between Space Vector Modulation and Carrier Modulation of Parallel NPC-3L Inverters

Author

Sun, Gaohongyi, He, Yingjie, Du, Haoting, Zhuang, Shenglun, and Liu, Jinjun

Abstract

To improve the power capacity of power system, several inverters are usually used in parallel. At present, global space vector modulation (SVPWM) of parallel inverters has been studied. However, when more inverters are in parallel, the implementation of SVPWM is very complicated and its calculation amount is greatly increased. Carrier-based pulsewidth modulation (CBPWM) is simple to operate and implement. The traditional study on the equivalent relationship between CBPWM and SVPWM in multilevel inverters is only applicable to monotonically increasing or decreasing sequences in the half cycle. The SVPWM sequence of parallel NPC-3L inverter exists the condition of increasing and decreasing or two-level jump in the half cycle, which has not been solved at present. Therefore, a new method is proposed to analyze the equivalent relationship between SVPWM and CBPWM modulation in parallel inverters. In the new method of modulation wave decomposition, the choice of carrier is determined by switching states of the vector sequence, and the number of submodulated waves is determined by the number of switching tubes and vector sequence of the inverter. Through strict theoretical derivation and experiment, the equivalence of the SVPWM sequence and CBPWM sequence of multiple arbitrary segments in parallel inverter is achieved successfully, and N parallel inverters are derived.

Published
2024
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3. Study on Requirement of Control and Stability with Renewable Energy Generation Grid Integration

Author

Zhuang Shenglun, Li Yan, Chi Yongning, Shi Lei, Qin Xiaohui, Tian Xinshou, Kong Xiangmei, and Sun Sujuan

Subjects
Engineering, business.industry, 020209 energy, 020208 electrical & electronic engineering, 02 engineering and technology, AC power, Grid, Automotive engineering, Power (physics), Renewable energy, Electric power system, Electricity generation, Electronic stability control, 0202 electrical engineering, electronic engineering, information engineering, Transient (oscillation), business
Abstract

Renewable energy generation has different static and transient characteristics than traditional synchronous power plants. The connection of renewable energy to the grid will have varying degrees of impact on the voltage stability of the local power grid. In a power grid with large renewable energy penetration, in addition to the voltage stability problem, renewable energy integration changes the original power flow distribution, line transmission power and inertia of the entire system, the power system transient stability has undergone tremendous changes. Renewable energy power generation technology and grid-connected scale are developing rapidly. The technical requirements for renewable energy and the research on grid-connected technology need to be continuously deepened and improved. However, some large-scale renewable energy off-grid accidents in recent years have brought serious threats to the security and stability of power systems, and have also raised higher research requirements for the stability of large-scale renewable energy grid-connected. This paper provides an introduction about the control and stability of renewable energy grid integration on both technologies and standardization aspects, and tries to explore potential the trend in active power and frequency control, reactive power and voltage control, security and stability control respectively caused by the integration of RE generation into power systems.

Published
2019

11. Parameter Design and Static Performance of Dual Stator-Winding Induction Generator Variable Frequency AC Generating System With Inductive and Capacitive Loads.

Author

Bu, Feifei, Hu, Yuwen, Huang, and Zhuang, Shenglun

Subjects
CAPACITORS, ELECTRIC filters, INDUCTION generators, EXCITATION systems of electric generators, REACTIVE power, ELECTRIC inductance
Abstract

In this paper, the design methods of the auxiliary excitation capacitors and the filter inductances are investigated for the dual stator-winding induction generator (DWIG) variable frequency ac (VFAC) generating system with inductive and capacitive loads, and the system static performance is presented as well. For this generating system, the proper selection of the auxiliary excitation capacitors and the filter inductances can minimize the reactive power capacity of the control winding, reduce the capacity of the static excitation converter (SEC) and improve the system static performance of the output voltage. The corresponding design principles and methods are proposed based on the change law of the control-winding reactive power and the requirements of the control-winding current. The experimental results show that the proposed design methods are correct and valid, and the DWIG VFAC generating system has a good static performance with the minimum-capacity control-winding reactive power and a compact-size SEC. [ABSTRACT FROM PUBLISHER]

Published
2014
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