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Chunyi Wang - IEEE Xplore Author Profile

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The assessment of the power transformers health status has garnered significant attention. The oil flow velocity serves as a critical parameter for assessing the severity of internal faults in oil-immersed power transformers, and its effective monitoring can accurately reflect the operational state of power transformers. The operational principle of existing transformer heavy gas protection involv...Show More
The randomness of load fluctuations at electric vehicle (EV) charging stations presents a significant challenge for the accurate load forecasting. Considering time-of-use (TOU) price and meteorological factors, EV charging load forecasting method for EV charging station is proposed. First, the factors affecting charging load are analyzed using the Pearson correlation coefficient and the maximum in...Show More
With the rapidly increasing market share of electric vehicles (EV) in recent years, the randomness and uncertainty of EV charging load have posed challenges to the operation of distribution networks. To improve accuracy in load prediction of EV charging station, a short-term load prediction method based on the long short-term memory (LSTM) recursive neural network is proposed in the paper. First, ...Show More
With the deepening reform of the electricity market in China, the study focuses on incentivizing distributed energy storage to provide frequency modulation ancillary services to the power system through market-based mechanisms. The research investigates the transaction decision-making of distributed energy storage in the energy and frequency modulation ancillary services market. An overall trading...Show More
The inter-turn insulation fault is one of the most common faults in large transformers. In order to investigate the variation of characteristic parameters during the development process of inter-turn insulation partial discharge, this study focuses on the pig-tail model and establishes an inter-turn discharge test platform. A multi-parameter signal measurement system is constructed, which includes...Show More
Surface discharge is one of the most severe discharge faults in transformer oil-paper insulation structures. In order to accurately obtain the variation characteristics of characteristic parameters during the development process of surface discharge under AC voltage, this study constructed a simulation experimental platform for the development process of surface discharge and established a measure...Show More
To solve the problem of active power imbalance in distribution network with high penetrations of photovoltaic (PV) under extreme weather, the paper proposes a distributionally robust optimal allocation method of energy storage considering extreme scenarios. Firstly, considering that the effect of energy storage on enhancing the resilience of distribution network is strongly related to its location...Show More
With the rapid development of wind power and photovoltaic power generation, the lack of flexibility in peak regulation further affects the new energy consumption. In order to alleviate the peak regulation pressure of thermal power units, a comprehensive evaluation index of peak regulation adequacy and an energy storage power station planning method of high-voltage distribution system are proposed ...Show More
This paper established an index system of power grid development level, covering six Level 1 dimensions of scale and speed, safety and quality, coordinated development, low-carbon development, service capacity and intelligent level, and incorporating 18 quantifiable indexes belonging to source, network or load side, to comprehensively and quantitatively evaluate the power grid development level. P...Show More
The optimal planning in integrated electricity and natural gas systems (IEGS) generally considers future load growth, but at present most planning is only a single stage. It is a one-time allocation and investment of all equipment at the beginning of the planning period, which is easy to cause problems such as redundant allocation in the early planning period, insufficient capacity and aging of eq...Show More
Under general trend of green energy development, distributed generations, a grid energy provider, are playing an increasingly important role in distribution network. Due to randomness and uncertainty, large scale of distributed generation will impact the stability and reliability of distribution network. In this paper, the research focus on configuration of energy storage system for adapting the i...Show More
With electric vehicle applied generally, it will produce many influences for distribution network, which should be evaluated in planning. According to requirements of distribution network, the evaluation indicators should focus on economy and reliability. Distributed generations are developing on a large scale, making great challenge to distribution network. In this paper, the functions of electri...Show More
With the wide application of distributed generation and advanced power electronic technology, AC / DC hybrid distribution network provides a new idea for the development of distribution network. Therefore, the AC-DC hybrid distribution network planning is of great significance. This paper presents a bi-level programming model of AC / DC distribution network considering the randomness of DC type of...Show More
With economy development and population increasing, it is significant to restruct and expand distribution network to follow electricity demand. In order to reduce investment costs and increase efficiency, it is necessary to scientifically and reasonably evaluate planning schemes and construct distribution network. In this paper, an evaluation system is established to evaluate comprehensively for d...Show More
With the rapid development of distributed generation, energy storage and other devices, and the wide application of new power electronic components, the distribution network has gradually turned into a complex system with two-way flow of power flow. The traditional simulation methods which divided into digital simulation method and dynamic simulation method are no longer applicable. Based on the t...Show More
With the rapid growth of large-scale, long distance high/ultra-high voltage transmission over the past few years, severe faults may cause more serious consequences on power system. A critical clearing time calculation (CCT) method based on enhanced binary search is proposed, in order to ensure the safety and stability of the power grid after the loss of large power supply or load. Based on interpo...Show More
With the increasing penetration of renewable energy in the distribution network, a large number of distributed generation access network, making the traditional passive network into active network, and changing the power flow distribution of radial network. The Soft Open Point Integrated with ESS (ESOP) can regulate the network power flow from two dimensions of time and space, and improve the econ...Show More
With the development of power electronics technology and the requirement of environmental protection, the penetration of renewable energy is ever-increasing in distribution network. However, uncertainties of renewable energy pose great challenges to the operation and management of distribution network, which casue stability and reliability issues. This paper establishs an evaluation system to anal...Show More
Extreme disasters seriously threaten power system security and stable operation. Power system resilience is an important means to evaluate the system response to low probability and high impact events. This paper proposes a resilience enhancement strategy based on cyber physical power system to cope with extreme natural disasters and restore the power system. At first, a defense framework for natu...Show More
In local power grid with high wind power penetration, using wind farm (WF) with energy storage system (ESS) as black-start (BS) source will significantly accelerate the restoration after blackout. For enabling WF to be a reliable BS source, an ESS sizing method based on asymmetric copula function is proposed, aiming mainly at smoothing WF output power during the process of starting up generator un...Show More
With large scale of renewable energy access into distribution network and technologies improved gradually, the structure of distribution network become more complex and diverse, so that the traditional operation methods will be hard to meet the requirements of reliability. Reviewed about interactive coordination and planning of active distribution network, the interactive coordination among source...Show More
A new practical automatic planning method for MV distribution network considering complementation of load characteristic and division of power supply is presented to solve the problems of large network size and low equipment utilization ratio caused by the lack of consideration of complementation of load characteristic in distribution network planning. First, based on the existing research results...Show More
Circulating components of the inner unbalanced current for modular multilevel converter will increase the power loss of the converter and reduce the utilization of the bridge arm capacities inevitably. Even worse, the distortion of the bridge arm current will be intensified, which will endanger the safe operation of the system. Among of the inner unbalanced current, the zero-sequence components ca...Show More
Grid connection of distributed generation would have a certain impact on safe and stable operation of receiving-end network, so systematic analysis on it would be significant. The method for comprehensive assessment on effects caused by grid connection of distributed generation on power grid is presented. The assessment system is divided into steady-state operation assessment, reliability assessme...Show More
Installing the battery energy storage in the interlinking converter of hybrid AD-DC grid can effectively reduce the exchanged energy of hybrid grid and therefore reduce the losses. Being different from the two-level or three-level interlinking converter for low voltage grid application, this paper proposes an interlinking modular multilevel converter (MMC) with integrated battery energy storage fo...Show More