Xiangyu Kong's research while affiliated with Tianjin University and other places

Publications (82)

Article
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The distribution-level phasor measurement unit(D-PMU), as a new type of measurement equipment, can support the fast and high-precision observations of active distribution networks. This paper presents a new D-PMU optimal placement method that can be used to reconcile investments with the reliability of high-precision observation systems. The multi-...
Article
Demand-side management (DSM) could realize “peak cutting and valley filling” of power load and improve the stability and efficiency of power system. With the development of information systems, more smart devices are being deployed on the demand side. It has become a challenge for DSM service providers to take full use of the edge computing capacit...
Article
Multiple energy storage devices in multi-energy microgrid are beneficial to smooth the fluctuation of renewable energy, improve the reliability of energy supply and energy economy. Taking the multi-energy microgrid with wind-solar power generation and electricity/heat/gas load as the research object, an energy storage optimization method of microgr...
Article
With the large-scale access of all kinds of distributed generations (DGs), the operation mode of the distribution network is increasingly diverse and changeable. To monitor the operation of an active distribution network, an adaptive dynamic estimation method is proposed to address the new generation of power system. Considering the features of dif...
Article
This paper presents an online smart meter measurement error estimation algorithm. Extended Kalman filter (EKF) and limit memory recursive least square (LMRLS) methods are used for remote calibration of a large amount of user-side smart meters. Then, a modified joint estimation model is obtained by selecting the estimation step that conforms to the...
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
To solve large-scale smart meter verification and periodic replacement problems, a remote estimation method based on neural network filter (NNF) and generalized damping recursive least square (GDRLS) is proposed. In this paper, a smart meter error estimation model with a loss noise filter is built. A typical loss noise filter is designed with a neu...
Article
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The power system’s stability is judged through the processing and analysis of wide-area information, and matching and executing the corresponding control measures based on data can be used as an effective backup and supplement to the security and stability control devices. This paper proposes an online additional emergency control strategy based on...
Article
The theft of electricity affects power supply quality and safety of grid operation, and non-technical losses (NTL) have become the major reason of unfair power supply and economic losses for power companies. For more effective electricity theft inspection, an electricity theft detection method based on similarity measure and decision tree combined...
Article
The safety and reliability of urban power supply are critical to the sustainability of cities and society. Based on the analysis of big data, a power supply reliability evaluation method for urban distribution networks considering uncertain factors is proposed in this paper. The method has good adaptability and can support the analysis of safety im...
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
Full-text available
The new reform of power system promotes the market‐oriented operation of microgrids. The ubiquitous power internet of things provide support in information, data, and computation to microgrids in market operation, energy management, and coordination interaction. This study takes the park microgrid with multi‐stakeholder as the object, establishes a...
Article
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...
Article
Incentive-based demand response is playing an increasingly important role in ensuring the safe operation of the power grid and reducing system costs, and advances in information and communications technology have made it possible to implement it online. However, in regions where incentive-based demand response has never been implemented, the respon...
Article
To guarantee the heat demand during winter, most combined heat and power (CHP) units in the integrated energy system (IES) usually work under following heat load (FTL) mode, and the renewable energy accommodation is limited. With the development of Power Internet of Things (PIoT), the information exchange in IES become more frequent. Through flexib...
Article
With the popularization of smart power consumption technology, users can optimize the use of electrical equipment through a home energy management system (HEMS), thereby reducing electricity costs while maintaining a degree of comfort. In this study, we established an HEMS with distributed power and an electrical vehicle, describing a multi-objecti...
Article
Full-text available
Thermostatically controlled loads (TCLs) have become a major tool for the demand response (DR) program when air conditioners cause peak loads in a day during the winter or summer. To solve the problem of a direct load control with TCL usually affecting user comfort and hardly considering responsiveness, a power retailer air-conditioning load aggreg...
Article
In this paper, we consider a one-dimensional laminated beam with structural damping and an infinite memory acting on the effective rotation angle. Under appropriate assumptions imposed on the relaxation function, we show that the system is well-posed by using the Hille–Yosida theorem, and then we establish general decay results, from which exponent...
Article
Full-text available
With the development of smart devices and information technology, it is possible for users to optimize their usage of electrical equipment through the home energy management system (HEMS). To solve the problems of daily optimal scheduling and emergency demand response (DR) in an uncertain environment, this paper provides an opportunity constraint p...
Article
Full-text available
Various countries in the world are vigorously developing energy-saving industries and attaching importance to the improvement of household energy efficiency, but it is difficult to evaluate user power consumption characteristics due to insufficient information and large data granularity. It is, however, possible to evaluate the energy efficiency of...
Article
Remote estimation of smart meter errors based on measurement data analysis from the user smart meter comes into focus because field calibration has high maintenance cost and difficult to analyze in time. In this paper, a remote estimation method of smart meter errors based on Dimension Reduction Estimation Model (DREM) and Damped Recursion Least Sq...
Article
Accurate short-term load forecasting (STLF) is an important basis for daily dispatching of the power grid, but the non-stationary characteristics of the load series add to the challenge of this task. Many researchers have been working to improve the accuracy and speed of forecasting models, but stability is equally important. This paper develops a...
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
In order to improve the reliability and continuity of power distribution system, power Internet of Things (IoT) analysis monitoring system was constructed in this study, and the system was used for comprehensive applications such as data acquisition and fault analysis. Fault location methods considering distribution phasor measurement unit (D-PMU)...
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
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
Demand-side management (DSM) increases the complexity of the forecasting environment, which makes traditional forecasting methods difficult to meet the firm's need for predictive accuracy. Since deep learning can comprehensively consider various factors to improve the prediction results, this paper improves the deep belief network from three aspect...
Article
With the development of energy internet and power market, the operation regulation and pricing mechanism of traditional virtual power plants are improved to adapt to the new environment. In this paper, a bi-level multi-time scale scheduling method based on bidding for multi-operator virtual power plant is proposed to provide a framework for solving...
Article
The utilization of distributed energy resources (DERs) is growing worldwide, and the commercial prospects of microgrids (MGs) are clear. To optimally coordinate the power outputs of DERs owned by different owners while considering uncertainties in the commercial MG, a multi-agent optimal bidding strategy based on the artificial immune system (AIS)...
Article
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In generation expansion planning, sustainable generation expansion planning is gaining more and more attention. Based on the comprehensive consideration of generation expansion planning economics, technology, environment, and other fields, this paper analyzes the sustainable development of power supply planning evaluation indicators and builds a mu...
Article
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A phasor measurement unit (PMU) can provide phasor measurements to the distribution network to improve observability. Based on pre-configuration and existing measurements, a network compression method is proposed to reduce PMU candidate locations. Taking the minimum number of PMUs and the lowest state estimation error as the objective functions and...
Article
In order to deal with the problem of robustness and computing speed of distribution system state estimation with the development of phasor technology, a stepwise distribution system state estimation with robust performance and considering real-time phasor measurement unit (PMU) measurements is proposed. The proposed method utilizes the absolute val...
Article
Full-text available
In view of the existing verification methods of electric meters, there are problems such as high maintenance cost, poor accuracy, and difficulty in full coverage, etc. Starting from the perspective of analyzing the large-scale measured data collected by user-side electric meters, an online estimation method for the operating error of electric meter...
Article
Full-text available
As the distribution network structure becomes increasingly complex, this paper proposes a distributed state estimation for distribution network with phasor measurement units (PMUs) information to improve the performance of state estimation. This proposed method takes the PMU installation locations as alternative points of the partition, and takes t...
Article
Full-text available
With the access of the renewable DGs such as wind turbines and photovoltaic generations, network operation state is uncertain due to the randomness of these renewable DGs. This paper proposes a novel optimal method of the active distribution network (ADN) considering the uncertain conditions and the coordination control of source-network-load. By o...
Article
Full-text available
Residential load has been considered as demand side resources with a huge potential. It has been a hot issue that how to reduce the cost of electricity consumption for the users considering user’s comfort. A new method based on the combination of the characteristics of the family load modeling was proposed in the paper. The working characteristics...
Article
Full-text available
With the development of active distribution networks, the means of controlling such networks are becoming more abundant, and simultaneously, due to the intermittency of renewable energy and the randomness of the demand-side load, the operating uncertainty is becoming serious. To solve the problem of source–network–load coordination scheduling, a mu...
Article
Full-text available
With the reform of power marketization, the price of electricity will be deregulated. Under the independent pricing mechanism and the emergence of multiple operating subjects within virtual power plant (VPP), the traditional operation control methods of VPP and their price mechanisms are difficult to adapt to the new environment. A demand-response...
Article
Full-text available
Wind farms are included in the grid Automatic Generation Control (AGC) will help for power system control. In order to minimize the imbalance between the active output of wind farm and the reference value, a power automatic control strategy for wind farm was proposed in the paper, which is considered the dispatching of safe operation of grid and th...
Article
Full-text available
With the increasing importance of renewable energy and flexible loads, the operation of the distribution system is becoming more stochastic and complex, and it is necessary to monitor the power system in real-time. Considering the gradual applications of intelligent electronic devices in the distribution systems, a hybrid state estimator based on s...
Article
In previous work [12], Lo and Tatar studied the exponential decay for a laminated beam with viscoelastic damping acting on the effective rotation angle in the case of equal-speed wave propagations. In this paper, we continue consideration of the same problem in the case of non-equal wave speeds. In this case, the main difficulty is how to estimate...
Article
Full-text available
Renewable new energy power generation prediction error like wind and light, brings difficulties to dispatch the power system. In this paper, a multi-time scale robust scheduling method is set to solve this problem. It reduces the impact of clean energy prediction bias to the power grid by using multi-time scale (day-ahead, intraday, real time) and...
Preprint
In previous work (Z. Angew. Math. Phys. 68(2), 2017), Apalara considered a one dimensional thermoelastic laminated beam under Cattaneo’s law of heat conduction and proved the exponential and polynomial decay results depend on the stability number χT . In this paper, we continue to study the same system and show that the solution of the concerned sy...