bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fire and blast resistance analysis of the firestop system of valve hall in UHVDC converter station
Authors: Zhong Bo , Zhao Chang-Zheng , Zhang Ze-Jiang , Jiang Ya-Qiang , Zhang Jia-Qing , Liu Xiao-Sheng , Huang Hao 
Published: March 2020

Abstract
The ultra-high voltage direct current (UHVDC) converter station is the core of the UHVDC project to realize the mutual conversion of alternating current (AC) and direct current (DC). Its operational reliability directly affects the safety of personnel and equipment and the stable operation of the grid. The firestop system is key part of the protective system in converter station, and it faces the threat of fire and explosion of converter transformer. In this paper, in order to analyze the shortcomings of the existing firestop system of valve halls, numerical models for fire and blast resistance analysis of typical firestop system are established. For a typical UHVDC converter station, the temperature distribution under hydrocarbon heating curve and dynamic response under different blast loads are analyzed by using the established numerical model. And the results show that the existing firestop system has good heat insulation performance, while the blast resistance cannot meet the demand.
Credit Risk Evaluation and Analysis of Power Generation Enterprises under the Spot Trading
Authors: Wei Zhong-Kang , Ning Bo , Zhu Tian-Bo , Niu Jia-Qiang , Liu Jun 
Published: March 2020

Abstract
China’s economic development has entered into a stage of “new normal”, with the market-oriented reform of electricity is deepening, the market risks faced by power generation enterprises are becoming increasingly severe. To reduce the loss caused by market risks and promote the efficiency of market operation, this paper established and evaluated the credit evaluation system for power generation enterprises. Specifically, based on spot power trading market, this paper firstly established a credit risk evaluation index system by assessing the credit risk of market trading members from four main aspects; then, the credit risk of typical enterprises has been analysed by fuzzy synthetic evaluation method. The result showed that power generation enterprises should focus on improving their financial ability such as profit and debt repayment in the operation process, attention should also be paid to integrity due to improving the performance rate of spot trading in the transaction process.
Economic Dispatch of Micro-grid Based on SQP—Validation and Results
Authors: Xu Bo , Zhang Yumin , Zhu Zhengyi , Zhang Xinyi , Miao Xiaofeng , Liu Jingyu , Wang Zhen 
Published: March 2020

Abstract
An economic dispatch strategy of micro grid based on sequential quadratic programming is introduced and formulated in the authors’ former paper in the context of mathematical model and formulations. In this paper, a small micro grid system in Yantai City, established by Shandong Electric Power Company, is used to investigate the performance of the proposed model in more detail. The results show that: in the independent micro grid operating mode, when the load is small, the operating costs of micro grid have a large difference before and after the control. In the grid-connected operation mode, the micro grid generates as recommended is more economical than full-power generation. Therefore, this paper can achieve the optimal output of each micro source and the economic operation with satisfying the load requirements.
Study on the deflection control of suspended tubular bus in 750kV transformer substation
Authors: Ai Xiancang , Feng Yugong , Zhang Xiaowen , Lu Xinwei , Chen Kai , Yang Junfen , Liu Chuanjiang 
Published: March 2020

Abstract
Because of the large span between bus bars and the big diameter and heavy weight of tubular buses, it has been a difficult issue to control the deflection of buses for the 750kV power distribution unit. Based on the hanging test on suspended tubular buses and the actual conditions in spot, finite models were established with different support types and rigidities to simplify the true hanging points and provide an effective reference for the optimization design of suspended tubular buses.
Classification of GIS Based on Adaptive Neural-Fuzzy Reasoning System
Authors: Lu Yufeng , Su Yi , Liang Zhaoting , Lu Yifan , Huang Jinjian 
Published: March 2020

Abstract
Partial discharge (PD) measurement is one of the most important diagnostic methods for the insulation system of high voltage equipment, which is convenient to evaluate the insulation state. Partial discharge activity may originate from various defects and exhibit different behaviors accordingly. Here, three PD patterns generated by different laboratory models representing GIS defects are recorded and analyzed. The purpose of this study was to conduct PD test with three GIS devices including prefabrication defects. statistical features are extracted from PD pattern data and reduced by linear discriminant analysis (LDA). the adaptive neural fuzzy inference system (ANFIS) was used to train the fuzzy inference system (fis). the proportion of trained fis used for ANFIS classification was as high as 95.83%.
Research on ammonia injection optimized adjustment test of selective catalytic reduction denitration device for 600MW coal-fired unit
Authors: Guo Liqiang , Liu Fengchun , Yan Hanbing , Chen Xiufang , Xu Liquan 
Published: March 2020

Abstract
After the ultra-low emission reform of the coal-fired power plant, the ammonia slip at the outlet of the Selective Catalytic Reduction(SCR) denitrification device increases, resulting in abnormal air preheater resistance, which affects the economic and safety of the unit. The optimized adjustment test was carried out on the ammonia injection system of the SCR denitration device for 600 MW coal-fired unit. Under the premise of meeting the ultra-low emission of the unit, the NOx and ammonia escape at the outlet of the denitration device are controlled by adjusting the ammonia injection manual door to reduce the NOx distribution deviation of the outlet. The test shows that the standard deviation of the NO concentration distribution at the outlet of the reactor A reduced from 27.72% before adjustment to 12.53% after adjustment. The standard deviation of the NO concentration distribution at the outlet side B decreased from 55.78% before adjustment to 14.52% after adjustment. The uniformity of the NOx distribution in the outlet zone of the reactor is significantly improved, thereby effectively controlling the escape of ammonia.
Shaking Table Test on Seismic Performance of Combined High Voltage Circuit Breaker
Authors: Li Hongbo 
Published: March 2020

Abstract
This paper focused on the experimental characteristics of seismic performance on a typical combined high voltage (HV) circuit breaker. Through the shaking table test of the scale model of a “T”-type circuit breaker, the results indicated that the test model could better reflect the main force characteristics of the prototype structures. Meanwhile, the dynamic characteristics of the model structure were reflected by white noise sweep frequency, and the seismic response of the model structure under the excitation of different seismic waves with different intensities were studied. It is concluded that the vulnerable parts of the model structure appeared at the root of the structural insulation porcelain column, the top and the bottom of the structure. Generally, the magnification coefficient of acceleration is about 1.1-2.7.
Optimum Design Operation Principles and Simulation Results of DC Breakers in High Voltage DC System
Authors: Meng Dedong 
Published: March 2020

Abstract
The feasibility DC power applied in distribution system is discussed. The efficiency and topologies of applying DC distribution for different purposes are investigated as well. For applying DC distribution, there are two key components, AC/DC converters and DC breakers. This thesis investigates the specification of converters suitable for applying in DC distribution system. In those converters, power losses are calculated as an index to compare their overall efficiency. Voltage control on the DC side and power factor correction on the AC side are also the primary requirements. Due to the absence of natural zero crossing current, the design of DC breakers is different from AC ones, therefore, in this thesis, the design rules of different DC breakers are investigated and their performance are also compared as a reference when selecting suitable DC breakers.
Research on the relevance of the cost of power cable and macroeconomic indicators based on comprehensive cost index calculation
Authors: Wang Hanze , Ma Xin , Huang Kai , Liu Jinpeng 
Published: March 2020

Abstract
With the rapid development of productivity, the demand for power supply is increasing dramatically. As a safe and reliable way of power transmission, the investment scale of power cable engineering is increasing. This paper innovatively puts forward a calculation method of cable line engineering’s comprehensive cost index, which accurately reflects the variations in cable line engineering’s comprehensive costs with different voltage levels and various construction technologies within a certain period of time. Furthermore, it explores cable line engineering’s comprehensive cost index and the correlation between macroeconomic indicators. The correlation coefficients between research objects are calculated. The research shows that there is a strong correlation between the law of power cable engineering cost hole and macroeconomic index, and the fluctuation of raw material price index also has a profound impact on the cost.
Research on Three-phase Variable Frequency Power Supply Based on DSP and SVPWM Technology
Authors: Fan Shiyong , Wang Shudong 
Published: March 2020

Abstract
Starting from the defects of analog power supply. Based on the analysis of space vector pulse width modulation algorithm, a three-phase variable frequency variable amplitude inverter power supply based on SVPWM technology is studied. On this basis, the PI control algorithm for closed-loop control of inverter power supply is also proposed. In order to improve the system response speed, the DSP with powerful digital signal processing capability was designed as the hardware platform, and various related verification experiments were completed. The results show that the system realizes a voltage-regulated output with a step of 1 V and a range of 40 V and an FM output with a step of 2Hz and a range of 50Hz to 1kHz. The system has small load regulation rate, excellent performance and good application prospects.
Study on Regional Comprehensive Energy Efficiency Evaluation Method
Authors: Cheng Liang , Wang Linyu , Sun Yaling , Wang Yongli , Zhang Danyang , Wang Jingyan 
Published: March 2020

Abstract
Integrated energy service is a new type of energy service to meet the diversified energy production and consumption of end customers, covering energy planning and design, engineering investment construction, multi-energy operation services and investment and financing services. This paper considers the energy input-output ratio, energy thermal efficiency and pollution gas emissions of the park, and comprehensively constructs an indicator system for the comprehensive energy park, which can provide guidance for the evaluation of comprehensive energy parks in the future.
DC Distribution Power Grid Voltage Level Sequence for Urban Power System in Integrated Energy System
Authors: Sang Zi-Xia , Zheng Xu , Yan Jiong , Wang Si-Cong , Du Zhi , Huang Jia-Qi , Chen Zhu , Huang Da-Wei 
Published: March 2020

Abstract
The development of HVDC technology makes it possible to build a multistage HVDC distribution power system. Firstly, the basic principles and main constraints of voltage level sequence for DC distribution are analyzed in detail. Based on the analysis of the DC distribution capacity of each voltage level, a series of voltage levels of DC distribution network with high voltage, medium voltage, low voltage and ultra-low voltage are proposed, taking the load demand as the basic foundation, considering the manufacturing level of relevant equipment and the need of power grid structure optimization. Finally, the specific voltage level sequence of DC distribution network is proposed.
Analysis about Power Supply Capability, Economy and Reliability on Voltage Level Sequence of Urban DC Distribution Power System in Integrated Energy System
Authors: Sang Zi-Xia , Zheng Xu , Yan Jiong , Wang Si-Cong , Du Zhi , Huang Jia-Qi , Chen Zhu , Wang Qi-Xin 
Published: March 2020

Abstract
With the development of DC power transmission technology, it is possible to develop a multilevel urban DC distribution system in integrated energy system. With the basic principle and main constraints of designing for DC distribution voltage level sequence, a sequence of voltage levels of DC distribution power system in different voltage levels is proposed, and the power supply capability, economy evaluation and reliability on voltage level sequence of multilevel DC distribution is discussed in detail through a specific example.
The Interruptible Load Control Strategy of Distribution Network in Integrated Energy Service System
Authors: Sang Zi-Xia , Zheng Xu , Yan Jiong , Wang Si-Cong , Du Zhi , Huang Jia-Qi , Chen Zhu , Wang Qi-Xin 
Published: March 2020

Abstract
In the integrated energy service system, distribution network shall manage to settle its own power balance issue. The market competition that grid corporations open the sale services of electricity to the society and interruptible load is encouraged to participate in ancillary services becomes a development tendency. At this time, a corresponding control strategy was required to instruct interruptible loads scheduling. In this paper, a control strategy using discrete Fourier transform is proposed in combination with the requirements of the electricity market. Under the constraint of the new evaluation criteria, different types of resident interruptible loads were on-demand dispatched in different periods. The root mean square error (RMSE) of the feeder daily forecast could improves the power load control capability of distribution network as well as the quality of power supply.
The Redundancy Scheme Optimization of DC Distribution Transformer for Electric Vehicle Charging Facility
Authors: Yan Jiong , Sang Zi-Xia , Zheng Yun-Fei , Wang Si-Cong , Du Zhi , Huang Jia-Qi , Chen Zhu , Wang Qi-Xin 
Published: March 2020

Abstract
The DC distribution transformer for electric vehicle charging facility is the key equipment in future active distribution power system, whose reliability relates to robust and reliable operation of distribution power system. With redundancy modules, reliability of the DC distribution transformer is increased as well as the cost. The reliability with different control methods for general DC distribution transformer is analyzed and compared, and an objective function is presented for optimized design. Solutions for minimum value of the function under different circumstances are discussed, and the best scheme for balance between reliability and economy is obtained. Finally, an engineering application is analyzed. Suggested model and number of sub-modules is given, and validity and feasibility of the proposed method is verified.
Long-term mechanism and key issues of trans-provincial and trans-regional power transmission
Authors: Tang Chenghui , Zhang Fan 
Published: March 2020

Abstract
In recent years, the trans-provincial and trans-regional power transmission have been an important manner in the power industry development in China. However, some annual capacity factors of power transmission lines are at a low level. This could reduce the power resource allocation efficiency and increase the social electricity cost. In this paper, the long-term mechanism and key issues of trans-provincial and trans-regional power transmission are studied, which aim to eliminate unnecessary transmission restrictions of the transmission lines based on long-term multilateral agreements.
Broken Rotor Bar Fault Diagnosis of Squirrel Cage Asynchronous Motor Based on Vibration Spectrum and Current Spectrum
Authors: Zhang Shuai 
Published: March 2020

Abstract
In this paper, the vibration spectrum and current spectrum analysis technology are used to accurately diagnose the broken rotor bar fault of the slurry circulating pump motor. This paper elaborates on the mechanism of broken rotor bar fault, deduces the common motor pole pass frequency calculation formula, introduces the specific diagnosis process and disintegration of the broken slurry circulating pump motor’s rotor bar breakage fault. The cause of the fault is analyzed, and this type of the fault diagnosis method is also summarized.
Economic dispatch of WT-PV-ES with cogeneration in abnormal regulatory domain
Authors: Ge Weichun , Yu Fengjiao , Liu Qianwei , Wang Shunjiang , Su Anlong , Pan Chao 
Published: March 2020

Abstract
The combined operation of cogeneration, distributed generation and energy storage can effectively meet the electrical and heat load requirements in the northern region, but its economic dispatching problem needs to be solved urgently. An economic dispatch model of WT-PV-ES with heat and power in abnormal regulatory domain is built considering economic cost and environmental cost. Meanwhile, an improved black hole algorithm is proposed, which applied the global search mechanism to improve the search efficiency and ability of optimization. The IEEE30 power distribution system and 6 node heat system are used for simulation. It is verified that the correctness of the proposed model and method.
Comprehensive Evaluation Method and Case Study on the Promotion and Application Effectiveness of Shore Power Supply Systems
Authors: Mao Ning , Cheng Jinxiang , Li Yue , Zhi Xiahui , Xu Honglei 
Published: March 2020

Abstract
The use of shore power supply system for ships at ports is one of the key promotion technologies for ship emission control according China’s 13th Five-Year Plan.However, there currently lacks established evaluation methods both in Chinaand abroad for the assessment ofshore power effectiveness. This study focuses on the most prevalent issues faced by various local regions in their promotion and application of shore power, proposes a set of evaluation methods tailoredfor local governments in the evaluation of promotion and application from five perspectives: construction and utilization of shore power facilities, institutional mechanisms, incentive policies and regulatory framework as well as a comprehensive evaluation of shore power effectivenessin Shenzhen as a case study. Results demonstrate that theevaluation method can fully reflect the effectiveness of local governments in their promotion of shore power, identify existing issues and opportunities for improvement, and may provide a baseline for the next-phase promotion of regional shore power facilities.
Optimization of vector control torque ripple of permanent magnet synchronous motor based on internal model principle
Authors: Ma Xihe , Lv Yingjun , Lv Changzhi , Zhang Yatong 
Published: March 2020

Abstract
Due to the dead zone effect caused by the non-ideal device of inverter, the currents of the quadrature and straight axis in the synchronous rotation coordinate of permanent magnet synchronous motor (PMSM) contain a large number of harmonic components, resulting in violent torque harmonics. Based on the field weakening control in single current regulator of interior permanent magnet synchronous motor (IPMSM), this paper gives an analysis of the reason for speed fluctuation, and a novel current compensation control strategy based on internal model control is proposed. By this means, the influence of harmonic currents on electromagnetic torque can be reduced meanwhile the advantage of single current regulator in filed weakening control is fully exploited. The feasibility and effectiveness of the proposed scheme are evaluated by Simulation analyses and experimental results.
Study on prediction model of construction period of power transmission and transformation project based on support vector machine
Authors: Yan Qingmeng 
Published: March 2020

Abstract
With the improvement of people’s living standard, the demand for electric energy is increasingly strong. In order to meet the increasing load, the construction scale of power transmission and transformation project of power grid company is increasing, and the difficulty of progress control of power transmission and transformation project is increasing. In order to control the progress of power transmission and transformation projects, it is necessary to make an accurate and reasonable time prediction to make a realistic and feasible schedule. Firstly, this paper analyses the influencing factors of the construction period of power transmission and transformation projects, and determines the key decision factors. Based on the support vector machine method, a prediction model of the construction period of power transmission and transformation projects is established. The prediction accuracy reaches 95.50%, with high accuracy.
Development of a new special combination tool for substation secondary service
Authors: Zheng Liwei , Guo Jianling , Liu Mingjun , Tian Haoye , Li Honglei , Jiang Chuan 
Published: March 2020

Abstract
In order to ensure the safety of power production, enhance substation secondary professional capability, especially improve the efficiency of the secondary professional in stripping cables. For conventional wallpaper knives, wire strippers, etc. used in traditional work. We carried out an overall improvement and upgrade, and combined the improved tools into a special combination tool for substation secondary inspection. It has been proved by practice that after using the special combination tool for substation secondary service, the work safety factor can be effectively enhanced, and the working efficiency of the secondary professional stripping cable is greatly improved. The special combination tool for substation secondary inspection proposed in this paper is of great significance for standardizing secondary professional operation standards, ensuring work safety and improving work quality.
A portable cable head insulating rubber cap
Authors: Zheng Liwei , Li Honglei , Liu Mingjun , Guo Jianling , Tian Haoye , Sun Dianlong 
Published: March 2020

Abstract
The importance of safety, efficiency and economy in the production of power systems is increasing. However, in the daily work, the traditional insulating tape which is used to insulate the bare wires has the problems of low safety, poor efficiency and serious waste. To this end, a portable cable head insulating rubber cap is proposed. The advantages of the new insulating rubber cap are remarkable. It is easy to install and disassemble and can be reused. It effectively solves the problems of safety, efficiency and economy in the past working methods. It is of great significance to ensure safe production and improve the quality of work.
Development of special tools for maintenance and testing of substation primary and secondary equipment
Authors: Zheng Liwei , Wang Wei , Liu Mingjun , Li Long , Li Honglei , Tian Haoye 
Published: March 2020

Abstract
In order to improve the work efficiency of the first and second overhaul of the substation, and to ensure the personal safety of the staff, this paper proposes a retractable test line box for secondary maintenance and a V-type porcelain column break insulation protection frame for isolation control of primary equipment. The wire box can effectively shorten the time of test wiring and make the on-site debugging work more convenient. The insulation frame guarantees personal safety. The retractable test line box and the isolating switch V-type porcelain column broken insulation protection frame can be used to improve the efficiency of the first and second on-site inspection and debugging, and effectively protect the personal safety of the staff.