Chengshan Wang

Chengshan Wang
Tianjin University | tju

About

448
Publications
42,117
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8,592
Citations
Citations since 2016
156 Research Items
6899 Citations
201620172018201920202021202202004006008001,0001,200
201620172018201920202021202202004006008001,0001,200
201620172018201920202021202202004006008001,0001,200
201620172018201920202021202202004006008001,0001,200

Publications

Publications (448)
Article
With the integration of power electronic devices represented by soft open points (SOPs), distribution networks have gradually evolved into interconnected flexible distribution networks (FDNs). Considering the deregulation of electricity market and user privacy, multiple stakeholders have participated in the operation of FDNs. Peer-to-peer (P2P) ele...
Article
The microgrid is one of the fundamental ways to consume renewable energy, and the safety and economy of its frequency regulation are widely concerned and studied. For the microgrid with shared energy storage, a new frequency regulation method based on deep reinforcement learning (DRL) is proposed to cope with the uncertainty of source load, which c...
Article
The increasing penetration of photovoltaics and electric vehicles exacerbates uncertainties of distribution networks, resulting in serious challenges to secure operation. To tackle the volatility caused by renewable generators and charging loads, a critical uncertain factors identification method is proposed to guide the allocation of flexible reso...
Article
With the deep coupling of electricity, heat, and gas systems, the uncertainties in renewable energy sources and loads significantly impact the energy flow distribution of integrated energy systems. Probabilistic multi-energy flow calculations considering these uncertain factors have become essential for risk analysis, optimal management, and operat...
Article
Full-text available
With the rapid development of flexible interconnection technology in active distribution networks (ADNs), many power electronic devices have been employed to improve system operational performance. As a novel fully-controlled power electronic device, energy storage integrated soft open point (ESOP) is gradually replacing traditional switches. This...
Article
With high penetration of flexible resources, operational flexibility of flexible distribution networks (FDNs) is important to ensure high-quality electricity services. This paper proposes a value quantification and analysis method for operational flexibility in FDNs based on distribution locational marginal pricing (DLMP). First, flexibility constr...
Article
Full-text available
Large offshore wind farms (OWFs), when connected to the onshore grids through the voltage source converter based HVDC (VSC-HVDC) transmission systems, do not provide inertia support for the onshore grid under the traditional control mode. Therefore, this paper proposes a supercapacitor-based coordinated inertia support (SCIS) strategy for the VSC-H...
Article
Full-text available
To improve the equivalent inertia of DC microgrids (DCMGs), a unified control is proposed for the first time for a bi-directional DC-DC converter based super-capacitor (SC) system, whereby power disturbance smoothing and SC terminal voltage regulation can be achieved in a DCMG simultaneously. The proposed control displays good plug-and-play feature...
Article
Full-text available
The real‐time simulation of active distribution networks (ADNs) can provide an accurate insight into transient behaviours, but faces challenges in simulation efficiency and flexibility brought by larger system scales and wider time‐scale ranges. This paper presents an asynchronous multi‐rate (AMR) method and design for the real‐time simulation of l...
Article
Economic and environmental benefits are the most important in the operation of community integrated energy systems (CIES), modeled as a bi-objective optimization problem. In the case of the uncertainties from loads and renewable energy generators, the effectiveness of the operation strategies may be degraded in the practical applications of CIES. I...
Article
Effective simulation methods are becoming critically essential for the analysis of integrated energy systems (IESs) to reveal the interactions of multiple energy carriers. The incorporation of various energy technologies and numerous controllers make the IES a heterogeneous system, which poses new challenges to simulation methods. This paper focuse...
Article
Reliability evaluation is essential for the planning, operation, and analysis of community integrated energy systems (CIESs). However, it is still challenging to quantify the reliability of CIESs accurately and efficiently because of the diverse energy characteristics and energy conversion relationships. In this paper, a reliability evaluation meth...
Article
The rapid development of digital economy has led to a dramatic increasement of internet data centers (IDCs), which consume a large amount of electricity. The diverse data-processing demands, high power consumption and workload uncertainty put forward a high requirement for the economical and secure operation of IDCs. As information technology (IT)...
Article
The highly penetrated distributed generators (DGs) aggravate the voltage violations in active distribution networks (ADNs). The coordination of various regulation devices such as on-load tap changers (OLTCs) and DG inverters can effectively address the voltage issues. Considering the problems of inaccurate network parameters and rapid DG fluctuatio...
Article
The increased DGs have exacerbated voltage violations in ADNs. Local reactive power control of DG inverters can realize a fast response to frequent voltage fluctuations. In this paper, a cloud-edge collaboration based local voltage control strategy for DGs is proposed with privacy preservation. First, a local voltage control framework is establishe...
Article
With large-scale distributed photovoltaics (PVs) being integrated into distribution networks (DNs), coordinated optimal power flow (OPF) of high voltage (HV) and medium voltage (MV) DNs should be investigated. This paper presents a hierarchical distributed OPF method for HV and MV DNs with on-load tap changers, reactive power compensators, feeder s...
Article
With the emerging digitalization technologies represented by edge computing, distribution networks are gradually transforming into digital distribution networks (DDNs). The realization of edge computing drives the distributed operation of DDNs, where multiple areas exchange boundary information through edge computing devices. Benefitting from the d...
Article
A rapidly growing amount of small-scale distributed energy resources (DERs) integrated into distribution systems call for an effective distribution electricity market to manage the uncertainty of DERs and remove barriers to the participation of DERs in wholesale electricity markets. To this end, this paper proposes an uncertainty-aware distribution...
Article
This paper proposes a novel bilateral inertia and damping emulation (BIDE) control scheme for VSC-HVDC transmission systems that can autonomously provide inertial and damping responses to two VSC-HVDC interconnected asynchronous AC grids in a similar fashion of synchronous generators. For each VSC station, the energy for inertia emulation comes fro...
Article
This paper proposes a novel imbalance-status (IS)-enabled autonomous global power-sharing scheme for a solid-state transformer (SST) interconnected hybrid AC / DC microgrid system. Firstly, the proposed scheme globally estimates instantaneous active power imbalances according to the existing droop regulation characteristics of each sub-microgrid, a...
Article
This paper systematically focuses on the transient stability problem of droop-based multi-converters DC (MCDC) system caused by large power disturbances. Therefore, a new and effective transient stability analysis method is proposed. In the present method, it starts with reduced-order nonlinear mathematical modeling, followed by Lyapunov energy fun...
Article
Full-text available
This paper proposes a novel inertia emulation and fast frequency-droop (IEFF) control strategy for a point-to point voltage source converter based high voltage direct current (VSC-HVDC) transmission system. It allows asynchronous AC grid synchronization in forms of inertial and damping responses provided to “both” sides of the VSC-HVDC interconnect...
Article
The condition of power imbalance in flexible distribution networks (FDNs) is deteriorated due to the high penetration of distributed generators (DGs). Through peer-to-peer (P2P) electricity trading, multiple regions interconnected by soft open points (SOPs) can flexibly exchange power to alleviate power imbalance. As the physical foundation of P2P...
Article
Full-text available
Featuring low communication requirements and high reliability, the voltage droop control method (VDM) is widely adopted in the voltage source converter based multi-terminal high voltage direct current (VSC-MTDC) system for autonomous DC voltage regulation and power sharing. However, the traditional VDM with fixed droop gain is criticized for over-l...
Article
Supply restoration from outages is essential for improving the reliability of active distribution networks (ADNs) after fault isolation. Soft open point (SOP) can adjust the power flow among feeders and provide voltage support for power outage areas. Considering the sequential coordination of switching operation and SOP control mode selection, a mu...
Preprint
Full-text available
An effective distribution electricity market (DEM) is required to manage the rapidly growing small-scale distributed energy resources (DERs) in distribution systems (DSs). This paper proposes a day-ahead DEM clearing and pricing mechanism to account for the uncertainty of DERs and the coordination with the wholesale electricity market (WEM) through...
Article
The high-precision parameters in distribution networks are dif-ficult to obtain, which brings difficulties to the model-based methods and analysis. With the widespread deployment of high-precision measurement units, data-driven methods have greater advantages in practice. In addition, with massive integra-tion of distributed renewable generation an...
Article
Full-text available
Abstract Harmonic resonance in a system with multiple inverters connecting to a single AC bus has been well studied in previous literature. However, in reality, a large number of distributed inverters are often classified into several groups using a few matching transformers. Due to the impact of matching transformers’ leakage impedance, the entire...
Article
With the rapid growth of wind power penetration in power grid, the system operators need to implement the grid specification of wind farm participating in primary frequency regulation (PFR). In this paper, a double-layer control framework based on permanent magnet synchronous generator (PMSG) is proposed, which can simulate the inertia and droop ch...
Article
The integration of phasor measurement units (PMUs) greatly improves the operation monitoring level of distribution networks. However, high sampling rates in PMUs generate huge volumes of measurement data, which creates heavy transmission and storage burdens in information and communication systems. In this paper, an improved singular value decompos...
Article
With the development of information technology, the scale and quantity of internet data centers (IDCs) are expanding rapidly. IDCs have emerged as the major electricity consumers in active distribution networks (ADNs), which dramatically increase the electricity load and have a significant impact on the operational flexibility of ADNs. Geographical...
Article
Full-text available
Abstract Frequency stability is important for microgrid with renewable energy. However, the deterioration of frequency and the increased energy storage equipment are caused by source‐load uncertainty. Therefore, a frequency coordinated control strategy based on sliding mode method for a microgrid with hybrid energy storage system (HESS) is proposed...
Chapter
The interconnected microgrid system (IMS) is a promising solution for the problem of growing penetration of renewable-based microgrids into the power system. To optimally coordinate the operation of microgrids owned by different owners while considering uncertainties in market environment, a bi-level distributed optimized operation method for IMS w...
Chapter
The penetration of distributed energy resources (DER) is growing worldwide, and microgrid (MG) is an approprate way to realize intergration of these DERs. The new reform of power system promotes the market-oriented operation of microgrids. This chapter takes the park microgrid with multi-stakeholder as the object, and to promote the interaction bet...
Article
Full-text available
This paper proposes a novel variable-inertia emulation control (VIEC) scheme that enables voltage-source-converter based high-voltage DC (VSC-HVDC) transmission systems to flexibly support AC grid frequency stability like synchronous generator. The VIEC scheme allows us to extract the energy from the augmented DC capacitance for inertia emulation b...
Article
Full-text available
Droop control has been well adopted for multi-source multi-load DC microgrids (MGs) due to its inherent modularity and reliability by only using local measurements, especially with the most commonly-used voltage-current droop ( V-I ) mode. While another implementation named current-voltage droop ( I-V ) mode also can be adopted. With the same val...
Article
The integration of soft open point (SOP) effectively improves the flexibility of active distribution networks (ADNs). However, in practical operation, accurate network parameters are difficult to obtain and the operation state changes rapidly with distributed generators (DGs). With the development of information technologies, massive operation data...
Article
With a high penetration of power electronic equipment, transient simulation for power electronic circuit has been a main challenge for performance improvement of the electromagnetic transient simulation tools. In this paper, two new solvers for the matrix exponential-based simulation method are proposed based on the dense output formula and Padé ap...
Article
In recent years, with the rapid development of the energy Internet and the deepening of the complementary coupling of various energy sources, the concept of multi-energy virtual power plant comes into being. At the same time, insufficient research on optimal scheduling of multi-energy virtual power plants under multiple uncertainties. Here we propo...
Article
In this paper, the sequence impedance of a single converter is separated into a fixed impedance term and an output power dependent term. Then an aggregated impedance model of identical parallel converters is established to evaluate the stability performance. It is found that the internal power allocation among parallel converters has no impact to t...
Article
Full-text available
The rapid growth in penetration levels of powerelectronics-interfaced renewable power generation into grids have been reducing system kinetic inertia, which results in degraded frequency stability and oscillation damping. In an attempt to address this challenge, this paper proposes a control scheme which realizes coordinated flexible damping mechan...
Article
To ensure reliability and flexibility of direct current (DC) system, direct current circuit breakers (DCCBs) are in urgent demand. Compared with solid-state and hybrid DCCBs, mechanical DCCBs have features of low operating losses and investment, showing bright application prospects. Until now, without concern about transient operating voltages (TOV...
Article
Full-text available
For the dynamic stability analysis of PI-controller-based dc voltage control of generic source-load two-terminal dc systems, a simpler RLC parallel impedance model has been proposed. First, by ignoring fast inner current control, the output impedance model of the dc voltage control system can be represented as a parallel RLC circuit, which give...
Article
Solar power generation is exhibiting a distributed development trend, and has changed conventional characteristics of power supply and consumption. The integration of large-scale distributed photovoltaic (PV) generation forms high-penetration PV clusters in distribution networks, which aims to organize and control geographically scattered resources...
Article
Full-text available
Hybrid HVDC system, which comprises a line commutated converter (LCC) at rectifier side and a voltage source converter (VSC) at inverter side, is drawing wide attention due to its high reliability and economic benefit. For such a new transmission technology, the system characteristics are not comprehensively studied, and inappropriate control param...
Article
With the extensive application of power electronic equipment in power systems, electromagnetic transient (EMT) simulation involving power converters becomes more challenging. Due to its multithreads and high throughput architecture, the graphics processing unit (GPU) can be used to accelerate those EMT simulations. A GPU-based matrix exponential me...
Article
Full-text available
Along with the increasing demand of large power transfer and integration of renewable energy sources, voltage source converter based multi‐terminal high‐voltage DC (VSC‐MTDC) technology has represented both challenges and opportunities. However, the DC voltage of the droop‐controlled VSC station may exceed the DC voltage limits when facing large di...
Article
The increasing penetration of distributed generators (DGs) exacerbates the voltage violations in active distribution networks (ADNs). The commonly used centralized voltage control may aggravate the burden of computation and communication. Local voltage control can realize fast response to frequent voltage fluctuations. However, effective local cont...
Article
Supply restoration from outages is essential for improving the self-healing ability of active distribution networks (ADNs). Soft open point (SOP) refers to a novel power electronic device installed to replace the traditional tie switch. Under fault situation, the coordination of multiple SOPs can provide voltage support and effectively expand the r...
Article
Full-text available
An analytical calculation method for the reliability sensitivity indexes of distribution systems is proposed to explicitly quantify the impact of various influence factors on system reliability. Firstly, the analytical calculation formulas for the reliability indexes of distribution systems are derived based on the fault incidence matrix (FIM). Sec...
Article
Full-text available
This study presents a novel family of dual‐transformer multi‐resonant DC–DC converters (DTMRCs) with a resonant zero point (RZP). The limitations of the conventional LLC resonant converter and its fundamental harmonic approximation (FHA) method are firstly discussed. On this basis, a unique RZP is combined with the dual‐transformer architecture. As...
Article
Aiming at the power supply capability evaluation under the background of controllable source-network-load in power system, a multi-objective power supply capability evaluation method for active distribution network considering the active control cost is proposed. Firstly, uncertain factors such as renewable distributed generations’ output and deman...
Article
Series connection of low-voltage power cells has been considered as an alternative microgrid configuration to supply rated voltage power to point of common coupling (PCC) loads. However, in the previous studies, the major focus was on the power regulation of system. Similar to the conventional shunt-distributed generation (DG)-unit-based islanded m...
Article
With a high penetration of intermittent distributed generators (DGs), the uncertainties in active distribution networks (ADNs) are exacerbated and further coupled in the networks. It brings enormous challenges on system operation and puts forward a higher requirement for the operational flexibility of ADNs. However, due to the secure constraints an...
Article
A simple decentralized interleaving PWM approach is proposed for parallel grid-tied converters, in order to achieve significant reduction of switching current ripples at the point of common couplings (PCC). Firstly, the remote PCC voltage phase angle information is calculated through only the local measurement of a DG unit converter and the estimat...
Article
Full-text available
With the access of renewable distributed generations and the uncertainty of demand‐side response, the operation states of the active distribution network (ADN) are uncertain. This study proposes a novel optimal strategy taking active management costs of the source–network–load as the goal and considering the site selection and the incentive price f...
Article
Wind power plays an important role for the development of renewable energy. Due to the variable wind power, parameter uncertainties and system disturbances, the voltage deviation of wind-diesel power system may become larger, which can lead to the unstable operation of power system. Therefore, the novel control strategy is proposed for the load sid...
Article
With the expansion in scale and complexity of distribution networks, distributed state estimation (DSE), a real-time database for other on-line applications, is becoming popular for large-scale active distribution networks (ADN). Measurements from phasor measurement units (PMUs) with the same time stamp can assist DSE to obtain faster and more accu...
Article
In the DC microgrid, renewable energy sources are increasingly applied as distributed generations to replace the traditional energy at remote locations. Meanwhile, energy storage system needs to be employed to maintain the balance between fluctuated power generation and load consumption. In this paper, the coordinated control strategy is proposed f...
Article
IEDS(Integrated Energy Distribution System) is a feasible development form of distribution power system in the future. Multi-energy coupling not only improves economy and comprehensive energy efficiency,but also brings challenges to the safe and stable operation of IEDS. To study the maximum operation boundaries of IEDS,based on the morphology anal...
Article
Facing the increasingly complex power system transient characteristics, the electromagnetic transient simulation tools are gaining popularity, thanks to their detailed modeling of power system equipment and high fidelity simulation results. Consequently, the Electro-Magnetic Transient Programs are increasingly used in simulation studies of higher d...