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Digital-analog hybrid simulation method combines the advantages of both real-time digital simulation and physical simulation, and will be an effective means for the simulation and analysis of future power system. However, the ideal transformer model (ITM), as the most widely used interface algorithm, is easy to encounter instability issues. A novel impedance compensation algorithm based on ITM is...
How to design an effective and efficient load-frequency controller (LFC) for a multi-area interconnected power system to improve its power quality is a challenging issue. In order to deal with this issue, this paper presents a novel distributed fractional-order PID (DFOPID) control method for the load-frequency control of each area by using an adaptive population-based extremal optimization (APEO)...
Paper analyzes harmonics during transient period of fault in a distribution grid and addresses the possibilities of using low order harmonics for detection of voltage dips during its transient stage. Detail and a comprehensive review of the literature is presented, as well as a major breakthrough in recent years for algorithms that using some form of harmonic transform for detection. The paper also...
Classical differential evolution (DE) is a good optimization algorithm with simple structure, easy operation and strong global search ability. Yet it is also inadequate. In this paper, a novel improved differential evolution called mean guiding differential evolution (MGDE) has been presented. By using difference information between amean individual and the best individual of previous generation to...
The penetration of electric vehicles (EVs) has attracted growing research interests in its impact on both power and traffic networks. With the expansion of EVs' range as well as the development of fast charging technology and related infrastructure, large-scale EVs are involved in intercity transportation systems and power transmission systems. We propose a traffic-power integrated network model and...
The purpose of the research is to develop and study Hybrid PWM for three level back-to-back neutral-point clamped converter (3L-BtB-NPC) based on active front-end rectifier and voltage source inverter. Hybrid PWM must provide smooth switching between the algorithms of space vector PWM and selective harmonic elimination PWM of VSI. This allows to decrease the losses in VSI, which arise when commutating...
The well-known maximum torque per ampere (MTPA) strategy is usually integrated the field oriented control (FOC) to improve the efficiency of interior permanent-magnet (IPM) synchronous motor drives. As an alternative to the FOC, direct torque control (DTC) has attracted extensive attention from both academia and industry in the last few decades, due to its distinctive advantages, e.g., fast dynamic...
Iterative learning control (ILC) is a simple technique devised for repetitive systems. In this work, an inter-sample ILC algorithm is proposed for the speed control problem of an induction motor. The proposed algorithm is mathematically analyzed and validated using a real-time experiment. Its performance is observed to be better than that of PI based Field Oriented Control (FOC) regarding convergence...
To manage the microgrid effectively, it is important to get the power information among multiple distributed generation (DG) units. However, when the droop control method is adopted, as the corresponding DG units cannot be simply modeled as VF or PQ buses, the conventional power flow algorithm may become inapplicable. To solve this issue, a time domain iteration (TDI) based power flow algorithm is...
This study presents a robust estimation control technique of single stage grid connected solar PV (Photovoltaic) energy conversion system with distribution static synchronous compensator (DSTATCOM) capabilities. The estimated perturb and observe (EPO) based maximum power point tracking (MPPT) algorithm is used to obtain crest power from solar PV array under varying atmospheric conditions. The proposed...
Structural Health Monitoring (SHM) is one of the most interesting research topics into civil engineering field. SHM consists of the processing and interpretation of the acquired data of a structure in order to evaluate its condition. An accurate early damage detection is an important task in SHM, as a reduction of both required time and repairing costs can be achieved. One of the most common damage...
In this paper, a new type of TSP, i.e. PTSP (Polymorphic Traveling Salesman Problem) is proposed. The problem is discovered from the research of scan field route optimization. As for PTSP, every node is polymorphic, which means each node can have several states, but obtains only a determined state in a determined loop, moreover a path which connects a pair of nodes can be different and have different...
Negative sequential patterns (NSP) become increasingly important and most of the existing methods introduce so strict constraints that many meaningful patterns would be lost. In this paper, we loosen these constraints and solve a series of consequent problems. Firstly, negative containment is defined to determine whether a data sequence contains a negative sequence. Secondly, an efficient method to...
To establish data connection in industrial wireless networks, the engineer has to enter the address of the target machine or manually select it from a list. Since the machines are densely deployed in the plant, the manual data connection becomes a non-trivial issue which may lead to connection error and waste of time. The existing technologies, such as QR code scanning and proximity estimation, simplify...
Smart meters based on Non-intrusive load monitoring (NILM) will be an essential part of our homes and buildings in the near future. In this paper, a novel algorithm for signal analysis in the context of NILM is proposed. The total electrical consumption is decomposed adaptively into narrow banded modes, which can be analyzed to extract useful information about the individual consumption of each device,...
The odometer measurement model is introduced in this paper and a measurement model considering the lever arm error is established. The influence of the misalignment angle and the lever arm effect on the navigation accuracy in SINS/OD (Strapdown Inertial Navigation System/Odometer) integrated navigation is analyzed, and a high precision dead reckoning algorithm considering lever arm effect is proposed...
Industrial Cyber-physical systems (ICPSs) are expected to provide effective solutions for improving the operation of many existing industrial manufacturing systems. Wireless sensor networks in the industrial field is classified as low-power and lossy network due to energy constrained devices, the dynamic environment and a high packet loss rate. Energy efficiency and delivery reliability need to be...
This paper describes the sliding discrete Fourier transform algorithm (SDFT) for parallel admittance estimation. The SDFT is a popular algorithm for continual single-point or several-point spectral analyzes of discrete time signals. The main drawback of the SDFT is a numerical stability issue. The paper describes the algorithm of SDFT with guaranteed numerical stability by parallel spectra computation...
This paper aims to develop a novel fault detection and diagnosis (FDD) method based on Bayesian network (BN). Firstly, the structure of BN is constructed according to the fault feature, which can be obtained from K2 algorithm and expertise. Then, corresponding parameters of BN are derived from dataset and expertise. Secondly, junction tree algorithm reasoning is provided. Finally, a framework of BN...
Power consumption is a key issue for wireless network design. Cooperative routing, an efficient scheme for saving transmission power in wireless networks, combines the advantage of the cooperative communication in the physical layer and the routing technology in the network layer. In this paper, we propose a distributed minimum power cooperative routing algorithm based on optimal power allocation,...
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