bluuebunny/crossref_metadata_2025_split huggingface dataset:
Interoperability Analysis of Resonance Compensation Network for Wireless Charging System of Electric Vehicles
Authors: Wang Songcen , Wei Bin , Zhang Hongyuan , Zhang Yanan , Jiao Chaoqun , Tong Qingbin 
Published: March 2020

Abstract
The compensation network of wireless charging system has many combinations, and the magnetic coupling mechanism of different network compensation combinations is usually inconsistent. How to realize matching control between power transmission and receiving devices is a key problem to the wireless charging. This paper studies the interoperability of different topologies of wireless charging system compensation network, and deduces the transmission characteristics of typical and complex topologies. A simulation model of resonant topology is established, which can simulate the switching of primary and secondary topologies in practical application scenarios. The changes of transmission and load characteristics of the system are analyzed, the interoperability of different topologies is evaluated, and suggestions for the production of wireless charging equipment are put forward.
Joint planning of distribution network and substation considering the effect of electric heating load
Authors: Zhang Zhi , Liu Jingxiong , Duan Xi , Zhang Yanhui , Zhao Haibo , Sun Chongbo , Yi Yinsi , Li Qi 
Published: March 2020

Abstract
A joint planning method for distribution network and substation considering the influence of electric heating load is proposed based on LCC in this paper. A multi-state model of electric heating load level is obtained by state sampling combination of ordinary load and electric heating load according to Monte Carlo method (MCS). Taking line investment cost, operation and maintenance cost, adjustable capacity transformer investment cost, operation cost, network loss cost and user outage loss cost as objective functions, a joint planning model of distribution network and substation considering the influence of electric heating load is established. The multi-objective optimization problem is transformed into a single-objective optimization problem by weighting, and solved by genetic algorithm with mixed chromosome coding. The simulation results show the effectiveness of the proposed method.
Performance analysis of 600 MW high sulfur coal unit desulfurization unit reform under ultra-low situation
Authors: Liu Xiaomeng , Wang Renlei , Zhang Ran , Liu Bo , Yao Jie 
Published: March 2020

Abstract
The 600MW high-sulfur coal desulfurizers in a power plant in southwest China adopt the single-tower 5-layer spray limestone wet desulfurization process. However, the change in the quality of coals initiated the need for capacity expansion. A renovation by adding two layers of sprays brought significant improvement to the performances, with the SO2 concentration at the outlet remaining below 400mg/m3. In response to the government’s call for ultra-low emission, the plant set up another renovation by constructing a new absorb tower, turning the 7-layer spray to an arrangement of 4+5 dual tower spray so as to lower the concentration of inlet SO2 from 12000mg/m3 to below 35mg/m3 through dual-tower desulfurization. The performance indexes of the two renovations were compared comprehensively, revealing that the gypsum is of poor quality and the content of fog drops at the outlet of desulfurizer is high. The paper also offers suggestions for optimized operation of desulfurizers.
Optimal Configuration of Power Supply of Microgrid based on Bilevel Layer Programming with Renewable Energy Preferred
Authors: Li Zhuonan , Wang Xiaochen , Zhao Zhiqiang , Li Haifeng , Song Xinfu , Zhang Zengqiang , Peng Sujiang 
Published: March 2020

Abstract
For the region where the renewable energy sources are more abundant and the requirement of load on power supply reliability is lower, a bilevel programming model giving priority to renewable energy is proposed, which takes environmental friendliness and economy into account. The lower level giving priority to renewable energy, which aims at maximizing the renewable energy power generation capacity, determines the size of renewable energy; The upper level ensuring the reliability of the system, which aims at minimizing the cost of the whole life cycle including the system initial investment, operation maintenance cost, fuel costs, environmental penalty cost and government subsidies, ultimately determines the optimal capacity configuration of different power sources in the system. Then a hybrid algorithm that combines the genetic algorithm with linear programming to solve this model is constructed. At last, by comparing the bilevel programming model with single layer and single target programming one, the validity and rationality of the model are fully verified, and the influence of the renewable energy penetration power limit, the cost of renewable energy units and the local climate factors on the optimization results are evaluated too.
Penetration level Permission for DG Considering Transmission-Distribution-Coordination
Authors: Ren Zhichao , Wang Xi , Ye Qiang , Wang Xiao , Hou Lan 
Published: March 2020

Abstract
With the rapid development of distributed power supply such as photovoltaic and fan, the coupling relationship between transmission network and distribution network is greatly enhanced, which also puts forward higher requirements for collaborative management and scheduling of transmission and distribution network. For this reason, this paper proposes a method to calculate the maximum access capacity of distributed generation considering the cooperation of transmission and distribution. First of all, based on the global optimization model of transmission and distribution, considering the characteristics and similarities and differences of the transmission and distribution network, this paper defines the model variables, builds the calculation model of the maximum access capacity of the distributed power supply considering the transmission and distribution coordination, uses the heterogeneous decomposition algorithm to solve the optimization model, and obtains the maximum access capacity of the distributed power supply. The results show that the proposed model has high accuracy and good convergence performance, and it has engineering application value.
Research on the Mechanism of Slagging and Fire-off for different capacity boilers
Authors: Wang Shuai , Wang Kai , Lu Kun , Zhang Qingguo 
Published: March 2020

Abstract
For slag extinguishing process of different capacities boilers (1000MW, 670MW, 300MW, 150MW), the slag extinguishing mechanism is analysed in terms of equipment, slagging characteristics, coal quality, furnace heat load, and operation mode. Prevention measures for slag extinguishing are put forward in terms of fire coal controlling, operation optimization, and technical transformation. Analyses results show that there are mainly three types of furnace pressure change during the slag extinguishing process. The common feature is that the furnace pressure goes up first, which is because of combustible gas explosion in the lower part of the furnace (primary reason) and the entry of a large amount of water vapor into the furnace (secondary reason). The degree of slagging for these four boilers is aggravated by the factors such as high ash content and sulfur content, the low input frequency of soot blower, and the large fineness of the pulverized coal.
Blockchain Auditing Technology for Inter-provincial Generation Right Trading
Authors: Lv Jianhu , Zhou Lin , Liu Shuo , Zhang Shuo , Si Liangqi , Li Guodong , Chen Ailin 
Published: March 2020

Abstract
This paper proposed an auditing method for medium and long-term inter-provincial generation right trading based on blockchain technology, ensuring that market participants’ private data and trade secrets cannot be tampered, and the transaction process can be traced back. In this way, trading institutions and regulatory authorities can obtain credible data. The method can provide a two-way book to trace the flow of energy and financial assets, provide data verification services to confirm the integrity and validity of the data, and it can provide data auditing service to identify contents that have been tampered. This paper took the generation right trading between the East and the West of China as an example, a blockchain testing environment was established to verify the feasibility of the auditing method for generation right trading. This paper offered an auditing solution for registration, declarations, clearing, and settlement of data involved in inter-provincial generation right trading.
Research on the development trend of virtual power plant in the spot market
Authors: Mu Yicheng 
Published: March 2020

Abstract
With the continuous promotion of power market reform, the spot market of electric power is gradually opened, and more and more flexible renewable energy can participate in market transactions. In order to ensure the safe and stable operation of power grid, virtual power plant has been developed. In the spot market, virtual power plants gather different resources and take part in market transactions as a whole. This not only benefits the virtual power plant itself, but also the whole power system. In order to study the impact of the spot market on the virtual power plant, this paper starts with the basic theory of the virtual power plant, then combined with the development of the spot market, studies the basic process of the virtual power plant participating in the market transaction, and explores the future development trend of the virtual power plant.
The preventive measure of power system blackout considering the thermal stability and voltage stability
Authors: Wang Jialin , Yu Qun 
Published: March 2020

Abstract
In order to ensure the reliable transmission of electric energy, some preventive measures are adopted to improve the stability of the power system. The thermal stability of the system can be improved by increasing the transmission capacity. And the voltage stability of the system can be improved by installing reactive power compensation device. In this paper, the above two methods are integrated. Firstly, the objective functions of thermal stability, voltage stability and economy of the system are established. Then the multi-objective particle swarm optimization (MOPSO) algorithm is used to solve the optimal configuration scheme of the thyristor controlled series capacitor (TCSC) and the static var compensator (SVC). Finally, according to the simulation results of the classical power failure model, the effectiveness of the proposed method is verified.
Prediction technology and application of primary frequency regulation capability of thermal power unit
Authors: Gao Song , Wang Jin , Wang Ming , Yan Qing , Yu Qingbin , Liu Enren , Li Yuanyuan , Meng Xiangrong 
Published: March 2020

Abstract
As one of the important functions of grid connected thermal power generation units, the primary frequency regulation function aims to increase and decrease load rapidly when the grid frequency changes, so as to achieve the stability of grid frequency. The primary frequency regulation capability of the unit is easy to be affected by the current main parameters of the unit operation and the operation mode of the equipment, which will lead to the phenomenon that the primary frequency regulation capability of the unit is insufficient. This paper introduces the basic principle of primary frequency regulation of thermal power units, and puts forward the main technical methods for prediction of primary frequency regulation capacity of units. Through the real-time prediction of the primary frequency regulation capability of the thermal power generation unit, the operation parameters and equipment operation mode of the thermal power generation unit can be changed in time, so as to avoid the lack of primary frequency regulation capability when the grid frequency changes. Finally, a typical industrial case is used to verify the effectiveness of this technology.
Research on new blast and fire stopping system of valve hall for UHVDC converter stations
Authors: Zhong Bo , Zhang Jia-Qing , Zhao Chang-Zheng , Zhang Ze-Jiang , Jiang Ya-Qiang , Fan Ming-Hao , Liu Xiao-Sheng 
Published: March 2020

Abstract
In this paper, a new blast and fire stopping system of valve hall for UHVDC converter station is proposed. With the hydrocarbon temperature rise curve, the fire resistance test of a 1.4m×1.8m sample was carried out, a numerical model for blast resistant analysis of the firestop structure was established, and the blast resistant performances of the original firestop structure and the new structure were calculated. The results show that the new fire and blast stopping system proposed in this paper has a fire endurance time limit of more than 4 hours with the hydrocarbon heating curve. At the same time, compared with the original system, the blast resistant capability of the new firestop structure is greatly improved.
A Novel Design Method for Resonance Network Parameters of Bi-directional CLLLC Resonance Converter
Authors: Hu Fangzhou , Qi Chengchao , Yu Xiaohang , Zhao Hongtao , Liu Anbo 
Published: March 2020

Abstract
In order to solve the problem that there are many resonant elements and it is difficult to design the full bridge CLLLC resonant converter, an improved resonant network parameter design method combined with simulation analysis is proposed in this paper. Accurate DC voltage gain curves are obtained under different resonant parameters. A 3.5 kW simulation circuit is constructed based on the parameters of the proposed method. The simulation results confirm the correctness and feasibility of the proposed improved design method.
Automatic logic optimization of denitrifying ammonia system for supercritical unit
Authors: Du Zhizheng , Song Ruifu 
Published: March 2020

Abstract
Based on the optimization of the automatic logic of the supercritical unit denitrifying ammonia system in a power plant, a cascade control system with the output NOx concentration as the main control loop and the supply ammonia flow as the secondary control loop is proposed, and on the basis of the cascade control system, the control strategy for eliminating system interference is added. Increase the response rate of the system. In particular, when the NOx concentration at the entrance fluctuates considerably, the optimized ammonia injection system quickly issues instructions to the ammonia flow regulator to adjust the NOx concentration at the flue gas outlet so that it tends to set values in a short period of time.
The Design of Controller for BLDC Based on STM32
Authors: Zhang Fengcan , Kong Xiangyu , Li Fang , Zhang Yulin 
Published: March 2020

Abstract
According to the characteristics and operation principle of brushless DC motor (BLDC), a drive controller of brushless DC motor is designed from the aspects of hardware and software. The control system uses STM32F103RBT6 as the control chip, including power supply circuit, drive circuit and detection circuit. According to the structure and characteristics of the brushless DC motor, the control system adopts the FOC vector control strategy and the double closed loop control strategy of the PI speed loop and the current loop. The experimental results show that the control system can control the motor to run stably and fast, and the control effect is good and the response speed is fast.
Fault and safety protection of ship power station
Authors: Yang Yuxin , Jin Zhemin 
Published: March 2020

Abstract
With the continuous development of the shipbuilding industry, there are more and more ship types, and the tonnage of ships is getting bigger and bigger. Traditional low-voltage ship power systems are no longer sufficient for navigation, and 6600 V high-voltage power supply systems are increasingly being used on large ships. High-voltage equipment is different from traditional low-voltage equipment, and incorrect operation can easily lead to safety accidents. In the process of building a ship, the shipyard has a complex environment. How to do safe operation and protection is especially important. This paper focuses on the safe operation characteristics of equipment, analyzes common faults, analyzes the requirements of on-site personnel for high-voltage safety protection, and ensures that the mooring test is carried out smoothly, and the test personnel and high-voltage power equipment are not damaged.
Research on application scheme of UPFC in UHV power grid based on multi-objective evaluation
Authors: Shen Xuhui , Luo Hongmei , Gao Wenman , Feng Yuyao , Feng Nan 
Published: March 2020

Abstract
UPFC can distribute the line transmission power rationally and improve the stability of power grid operation, which is not only the focus of the current attention of the engineering community, but also the hot spot in the academic field. Aiming at the application of UPFC in UHV power grid, this paper first introduces UPFC’s principle and function. Based on the analysis of the problems in UHV power grid planning, this paper proposes the UPFC application scenarios in UPFC power grid. Then using BPA simulation platform, this paper calculates and analyzes the feasibility of each UPFC alternative location in different scenarios. Finally, based on the fuzzy evaluation, the comprehensive evaluation of each scheme in technical level is carried out. The results show that UPFC has strong capability in improving the transmission capability and improving the system voltage, which can solve the problems that UHV Power Grid will face effectively.
Analysis and Treatment of Generator Vibration Faults in a Power Plant
Authors: Chai Baotong , Zeng Qing Meng , Wu Zhengfeng 
Published: March 2020

Abstract
This paper presents a detail research on a vibration high fault after overhaul occurred on a generator. During the overhaul, the generator rotor is returned to factory for processing and replaces section across the line of the generator excitation end. The gas turbine unit vibrates high in the idle 3000 r·min−1 and full load. The large vibration of the generator is mainly caused by the following two factors:the imbalance in the overhanging end of the generator rotor and the electrical fault in the generator itself. The unbalanced amount of generator overhang was successfully eliminated by dynamic balance test. The electrical fault of generator itself needs to be returned to the factory to handle.
Construction and Application of Data Mining Model of Unit Scale Cost of Electric Grid Project
Authors: Rong Peng , Liu Guoming , An Peng , Qi Xiang , Wang Qing , Yue Caiyang , Zhang Wei , Zhang Han , Dai Yong 
Published: March 2020

Abstract
With the further promotion of the power system reform, the transmission and distribution price reform is in-depth, from “building mechanism” to “strong supervision”, and the effectiveness of investment has become the focus of supervision, so that grid enterprises must pay more attention to the efficiency and efficiency of investment. This paper mainly studies how to build a project cost analysis and data mining model based on the massive feasibility study estimate, preliminary design estimate and final account data of power grid infrastructure projects, mining the value laws and characteristics of power grid infrastructure projects from multiple scenes and perspectives, supporting the investment amount estimate in the planning stage, the investment estimate review in the feasibility study stage, and the investment control target prediction in the planning stage, so as to improve the investment efficiency of electric grid project.
Distributed Energy Storage Optimization Location Method Based on Improved Voltage Distribution
Authors: Zhu Haifeng , Tian Fangyuan , Li Yan , Deng Kai , Feng Yulong , Tang Xiaobo 
Published: March 2020

Abstract
Aiming at the problem of voltage overrun caused by large-scale distributed generation (DG) access to distribution network, a distributed energy storage optimization location method based on improved power quality is proposed. Firstly, the voltage governance mechanism of distributed energy storage access to distribution network with large-scale distributed generation is analyzed. Secondly, a distributed energy storage optimization site selection model is proposed, which can be solved in two stages: In the first stage, the power flow calculation is performed based on the typical time section, and the set of energy storage grid-connected nodes is determined by using the weighted voltage sensitivity. In the second stage, the distribution network voltage offset and active power loss optimization are taken as the objective functions. Each node in the set is selected as a parallel node for power flow calculation to determine the final grid-connected node by using the enumeration method. Finally, the improved IEEE33 node distribution network system is taken as an example to verify the correctness of the proposed model. The results of the example show that the distributed energy storage access can effectively support the voltage, and the proposed location model has good practicability.
Improved Droop Control Strategy of Energy Storage in Islanded Microgrid
Authors: Zhu Haifeng , Tian Fangyuan , Li Yan , Chen Xiao , Feng Yulong , Tang Xiaobo 
Published: March 2020

Abstract
In islanded AC microgrid, droop control strategy is usually adopted for independent distributed generators (DG) which can realize coordinated operation of each unit under the conditions of less data communication. For different capacity of energy storages (ES) system, due to the difference of SOC value, capacity and other state parameters, some units may reach the threshold quickly, thus affecting the system stability. Therefore, on the basis of traditional droop control, combined with the SOC value of energy storage unit, the droop curve which is automatically adjusted with the change of SOC value is constructed. At the same time, the bus voltage is corrected to run at a predetermined point through the voltage feedback link to eliminate the voltage fluctuation. Finally, a microgrid model with dual energy storage system is built inMatlab/Simulink simulation environment. Theresults show that the improved droop control method can make the SOC values of the two energy storages consistent.
Research on Releasing Plans of Power Generation and Power Utilization in China
Authors: Wu Zechen , Zhang Fan , Tang Chenghui , Xue Song 
Published: March 2020

Abstract
Chinese government intends to fully liberalize the power generation and utilization plans for operating power users. This paper analyzes the problems faced when power generation and utilization plans fully liberalized, that is priority electricity unbalance problem and power grid enterprises’ income problem. Then three schemes for priority generation and purchase matching as well as two schemes for price adjustment are proposed. After comparing the advantages and disadvantages of each schemes, we recommend the partly decoupling mode for priority generation and purchase matching, that is allocating priority purchase power to clean energy first, and sharing the shortfall to conventional units in proportion. We also recommend cost sharing mode for price adjustment, that is determining priority generation plans in advance, and calculating related costs in transmission and distribution prices for market-oriented users.