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2022 4th International Conference on Power and Energy Technology (ICPET)最新文献

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Research on Power Modulation to Suppress Low Frequency Oscillation by Asynchronous Interconnection HVDC System 异步互联高压直流系统功率调制抑制低频振荡的研究
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918418
Xingkui Li, Guoan Dai, Weifeng Sun, Chen Cui, Zhuofan Li, Chenghao Li
when the Generator run in parallel through the transmission line, the relative swing between the motor rotors will occur under the disturbance. If there is insufficient damping, it will cause the occurrence of low frequency oscillation (LFO). HVDC transmission system has the advantages of fast regulation speed and high control accuracy and it can be used to suppress the LFO. In this paper, the mechanism of asynchronous interconnected HVDC transmission to suppress inter regional LFO is studied. Then the strategy of power modulation to suppress LFO is proposed. In the end, the suppression strategy is verified by simulation based on an actual power grid simulation model. The simulation results show that when LFO occurs, the proposed strategy can effectively increase the system damping, suppress the generation of LFO and improve the dynamic stability of AC/DC interconnected system.
当发电机通过传输线并联运行时,在扰动作用下电机转子之间会产生相对摆动。如果阻尼不足,则会导致低频振荡(LFO)的发生。高压直流输电系统具有调节速度快、控制精度高的优点,可用于抑制低电压负载。本文研究了异步互联高压直流输电抑制区域间LFO的机理。然后提出了功率调制抑制LFO的策略。最后,基于实际电网仿真模型,对该抑制策略进行了仿真验证。仿真结果表明,当LFO发生时,该策略可以有效地增加系统阻尼,抑制LFO的产生,提高交/直流互联系统的动态稳定性。
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引用次数: 1
A Novel High Step-up Switched Capacitor DC-DC Converter Based on Coupled Inductors 一种基于耦合电感的新型高升压开关电容DC-DC变换器
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918391
Xuechen Bai, Hao Liu, Jingyun Gu, Hongye Cai, Yueshi Guan, Dianguo Xu
A novel high step-up switched capacitor DC-DC converter based on coupled inductors is proposed in this paper. The proposed topology solves the problem of insufficient voltage on the switched capacitor, thus improves the traditional energy storage structure. Combined with the coupled inductor, which further improve the voltage gain characteristics and reduce the stress of the switching device. The operating principle and steady state analysis of the converter are introduced in details, and a 200W experimental prototype with an input voltage of 25-45V and an output voltage of 380V is established in the laboratory to verify the feasibility of the converter.
提出了一种基于耦合电感的新型高升压开关电容DC-DC变换器。该拓扑解决了开关电容电压不足的问题,从而改进了传统的储能结构。结合耦合电感,进一步提高了电压增益特性,减小了开关器件的应力。详细介绍了变换器的工作原理和稳态分析,并在实验室建立了输入电压为25-45V、输出电压为380V的200W实验样机,验证了变换器的可行性。
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引用次数: 0
High-Precision Distributed Lithium-ion Battery Charging/Discharging Monitoring System 高精度分布式锂离子电池充放电监测系统
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918245
Yangjiajia Liu, Xiangwu Yan, Jiaoxin Jia
With the increasing number of fires caused by the failure of lithium-ion battery systems under extreme working conditions, the safety of lithium-ion battery systems is becoming more of a concern. Although the complicated electrochemical reactions inside the battery cannot be measured directly by various meters, electrical parameters such as voltage and current can be used to estimate the battery’s safety condition. In this paper, the Renesas microcontrollers are used to design a distributed series-battery-pack-based charging/discharging monitoring system with a master control unit and slave control unit. First, the functional framework of the system, the hardware circuit, and the scheme for information interaction are all devised. Battery cell voltages are recorded by the slave control unit, and the master control unit collects the data acquired by all the slave control units through internal communication while collecting total battery pack voltage and current. Second, the software programs of each module are written, and the working principles for programs including the master program, data acquisition program, and communication program are provided. Finally, the experimental platform is built to conduct joint software and hardware debugging experiments. The experimental results show that the calibrated monitoring system could perform functions such as high-precision measurement of electrical parameters of a cell and transmission of communication information, ensuring that there is no blind spot during the operation monitoring of the battery pack.
随着锂离子电池系统在极端工况下发生故障引发的火灾越来越多,锂离子电池系统的安全性越来越受到人们的关注。虽然各种仪表无法直接测量电池内部复杂的电化学反应,但可以利用电压、电流等电学参数来估计电池的安全状况。本文采用瑞萨电子微控制器设计了一种基于分布式串联电池组的充放电监控系统,该系统具有主控制单元和从控制单元。首先,设计了系统的功能框架、硬件电路和信息交互方案。电池单体电压由从控单元记录,主控单元在采集电池组总电压和电流的同时,通过内部通信将各从控单元采集到的数据进行汇总。其次,编写了各模块的软件程序,给出了主程序、数据采集程序和通信程序的工作原理。最后搭建实验平台,进行软硬件联合调试实验。实验结果表明,标定后的监测系统能够实现对电池电学参数的高精度测量和通信信息的传输,保证了电池组运行监测无盲区。
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引用次数: 0
Distributionally Robust Dynamic Economic Dispatch With Energy Storage and Renewables 基于储能和可再生能源的分布式鲁棒动态经济调度
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918217
Zhongjie Guo, Wei Wei, Jungang Yu, Haiji Zhao, S. Mei
The integration of renewable generation which is uncertain and fluctuates over time challenges the economic dispatch of power systems. This paper proposes a distributionally robust dynamic programming framework to make economic dispatch decisions in a sequential manner. Compared to the stochastic DP that assumes the stage-wise independence of uncertainty and applies the sample average approximation, the proposed framework is improved from two main aspects: first, the temporal dependence of uncertain variable is exploited and the value functions in Bellman’s equation are taken conditional expectation; second, the inexactness of estimated conditional distribution is compensated by considering the worst distribution within an ambiguity set. A sampling-based algorithm with efficient samples is proposed to calculate the value functions. Case studies conducted on the modified IEEE 118-bus system verify the effectiveness of the proposed method.
可再生能源发电的不确定性和时段性对电力系统的经济调度提出了挑战。本文提出了一种分布式鲁棒动态规划框架,用于按顺序进行经济调度决策。与假设不确定性阶段独立、采用样本平均近似的随机DP相比,本文提出的框架主要从两个方面进行改进:一是利用不确定变量的时间依赖性,将Bellman方程中的值函数取条件期望;其次,通过考虑模糊集内的最差分布来补偿估计条件分布的不精确性。提出了一种基于有效样本的采样算法来计算值函数。对改进后的IEEE 118总线系统进行了实例研究,验证了所提方法的有效性。
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引用次数: 0
Research on Photovoltaic Consumption Based on Occurrence Probability of Typical Scenarios 基于典型场景发生概率的光伏消纳研究
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918260
Guodong Zheng, Yanhu Ma, Donghui Chen, Zhixiang Sun, Pu Zhang, Yanbo Chen
With the continuous increase in the access of new energy sources such as photovoltaics in the power system, in order to reasonably evaluate the photovoltaic consumption of the power system, this paper proposes a photovoltaic consumption evaluation method that considers the probability of typical scenarios. The method firstly performs cluster analysis on the historical data of photovoltaic output to obtain multiple typical scenarios of photovoltaic output and their occurrence probability, and then takes the maximum photovoltaic power consumption as the objective function to solve the maximum photovoltaic power consumption under each typical scenario. Finally, the final photovoltaic consumption is obtained by multiplying the maximum photovoltaic consumption in each scenario by the occurrence probability of the corresponding scene and summing up. The example analysis shows that, compared with the solution method of a single typical scenario, the photovoltaic consumption based on the occurrence probability of the typical scene is more reasonable, and can effectively reflect the annual photovoltaic consumption of the power grid.
随着光伏等新能源在电力系统中的接入不断增加,为了合理评估电力系统的光伏消纳,本文提出了一种考虑典型场景概率的光伏消纳评估方法。该方法首先对光伏发电量的历史数据进行聚类分析,得到光伏发电量的多个典型场景及其发生概率,然后以最大光伏耗电量为目标函数,求解每个典型场景下的最大光伏耗电量。最后,将各场景下最大光伏用电量乘以对应场景的发生概率,求和得到最终光伏用电量。算例分析表明,与单一典型场景的求解方法相比,基于典型场景发生概率的光伏消纳更合理,能有效反映电网年光伏消纳情况。
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引用次数: 0
A Robust Distributed Secondary Control of Microgrids Considering Communication Failures 考虑通信故障的微电网鲁棒分布式二次控制
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918252
Xiaoyan Wu, Sicheng Deng, Wenkai Yuan, S. Mei
Consensus-based algorithm is widely used in secondary frequency and voltage control in islanded microgrids. However, most existing control strategies require communication network to be connected. The control performance considering communication failures has not been adequately studied owing to the lack of a robust secondary control strategy for communication failures This article proposed a robust secondary frequency and voltage control strategy, which is suitable for the emergency that communication links are disrupted. Simulation based on MATLAB/Simulink verifies its effectiveness. The communication performance of the proposed algorithm under typical communication topologies is further studied and analyzed, and several characteristics of typical communication failures are presented, as well as communication network design suggestions.
共识算法广泛应用于孤岛微电网的二次频率和电压控制。然而,大多数现有的控制策略都需要连接通信网络。由于缺乏针对通信故障的鲁棒二次控制策略,对考虑通信故障的控制性能研究不足。本文提出了一种适用于通信链路中断紧急情况的鲁棒频率和电压二次控制策略。基于MATLAB/Simulink的仿真验证了该方法的有效性。进一步研究和分析了该算法在典型通信拓扑下的通信性能,给出了典型通信故障的几种特征,并给出了通信网络设计建议。
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引用次数: 0
A New Method to Detect the Inter-Turn Short Circuit Fault of Dry-Type Air-Core Shunt Reactor 干式空芯并联电抗器匝间短路故障检测新方法
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918464
Jie Wu, Rongsen Luo, Man Zhang, Yumin Peng, Shi Jing, Qixing Huang
Due to the insulation fails caused by complex factors, such as the manufacture factors, transportation and complicated working environment, inter-turn short circuit fault is one of the frequent failures of shunt reactor, at the early stage of whom, its current is not high enough to trigger the protection equipment. However, the current in the shorted turn is very high, which causes serious copper loss, resulting in high temperature rise. In severe case, it will cause fire accident and explosion. Thus, it’s important to design a sensitive and reliable method to detect the inter-turn short circuit fault at its early stage. In this paper, a method based on the power loss factor (PLF) considering both the activate power and equivalent resistance of reactor, is proposed to detect the inter-turn short circuit fault of an air-core shunt reactor considering the effect of insulation resistance. Taking a BKDCL−20000/35 dry-type air-core shunt reactor as an example, the inter-turn short circuit faults occur at different axial heights and coil layers are investigated. The electrical parameters, including equivalent resistance, equivalent inductance, active power, reactive power etc. are presented and comparison is implemented between the normal condition and failure conditions. The current and active power of the shorted turn is calculated and analyzed, which are used to explain the parameters variation of the reactor when inter-turn short circuit fault occurs. Finally, PLF under various working conditions is computed and presented, which provide an alternative to monitor the inter-turn short circuit fault.
由于制造因素、运输和复杂的工作环境等复杂因素引起的绝缘失效,匝间短路故障是并联电抗器的常见故障之一,在并联电抗器的早期,匝间短路电流不足以触发保护设备。但短匝电流很大,造成铜损严重,导致温升过高。严重时,会引起火灾和爆炸事故。因此,设计一种灵敏、可靠的匝间短路故障早期检测方法显得尤为重要。提出了一种同时考虑电抗器有功功率和等效电阻的基于功率损耗因子(PLF)的方法,在考虑绝缘电阻影响的情况下检测空芯并联电抗器匝间短路故障。以BKDCL−20000/35型干式空芯并联电抗器为例,研究了不同轴向高度和线圈层数下匝间短路故障。给出了等效电阻、等效电感、有功功率、无功功率等电气参数,并对正常工况和故障工况进行了比较。对短路匝电流和有功功率进行了计算和分析,用以解释发生匝间短路故障时电抗器参数的变化。最后,计算并给出了各种工况下的PLF,为匝间短路故障的监测提供了一种替代方法。
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引用次数: 0
Optimal Dispatch of Regional Integrated Energy System Considering the Integrations of Electric Vehicles under the Dual Carbon Goal 双碳目标下考虑电动汽车集成度的区域综合能源系统优化调度
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918405
LinGang Li, Dechang Yang, H. Pandžić, N. Tomin
In order to further reduce the rate of abandonment of wind and light and improve the operation economy of the Regional Integrated Energy System (RIES), this paper proposes a bi-level optimization scheduling model of RIES with consideration of electric vehicle (EV) charging. Firstly, according to the analysis of the EV charging characteristics, the disordered charging model based on Monte Carlo and the orderly charging model based on Time-of-Use (TOU) electricity price are established. Then, considering the uncertainty of wind and photovoltaic power, as well as the flexibility of EV charging, the bi-level optimization scheduling model is adopted to reduce the carbon transaction cost and to improve the utilization rate of renewable energy. Finally, verified by the wind-solar hydrogen storage regional integrated energy system, the simulation results indicate that: the proposed bi-level optimization scheduling model has the characteristics of high wind and solar utilization, low carbon transaction costs, and good economic effects.
为了进一步降低风电弃光率,提高区域综合能源系统的运行经济性,本文提出了考虑电动汽车充电的区域综合能源系统双层优化调度模型。首先,在分析电动汽车充电特性的基础上,建立了基于蒙特卡罗的无序充电模型和基于分时电价的有序充电模型;然后,考虑风电和光伏发电的不确定性,以及电动汽车充电的灵活性,采用双层优化调度模型,降低碳交易成本,提高可再生能源利用率。最后,通过风能-太阳能储氢区域综合能源系统进行仿真验证,仿真结果表明:所提出的双层优化调度模型具有风能和太阳能利用率高、碳交易成本低、经济效果好的特点。
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引用次数: 0
Sensitivity Analysis of Influencing Factors for Renewable Energy Accommodation 可再生能源住房影响因素敏感性分析
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918199
Juan Chen, Bo Cheng, Zheng Zeng, Hongkun Chen, Yingxin Shen, Zilun Cheng
Renewable energy has been growing rapidly inspired by the goal of "emission peak and carbon neutrality" in China. However, the phenomena of wind and solar power curtailment still exist, so the issue of renewable energy accommodation has attracted extensive attention. In this context, this paper proposes a sensitivity analysis method for the parameters of renewable energy accommodation, which comprehensively considers the load rate, the reserve rate, the conventional unit peak shaving rate, and the renewable energy penetration rate. Firstly, the mechanism of renewable energy accommodation is analyzed. Moreover, the mathematical model of the sensitivity of the accommodation capacity to each parameter is established, revealing the influence of each parameter on the sensitivity. Finally, the validity of the proposed method is verified by a case study using field data. The result shows that the proposed method can efficiently improve the capacity of renewable energy accommodation.
在中国“峰值排放和碳中和”目标的激励下,可再生能源发展迅速。然而,风能和太阳能弃电现象依然存在,因此可再生能源住宿问题引起了广泛关注。在此背景下,本文提出了综合考虑负荷率、备用率、常规机组调峰率、可再生能源渗透率等因素的可再生能源调节参数敏感性分析方法。首先,分析了可再生能源调节的机理。建立了容纳能力对各参数敏感性的数学模型,揭示了各参数对其敏感性的影响。最后,通过现场数据算例验证了所提方法的有效性。结果表明,该方法能有效提高可再生能源住宅容量。
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引用次数: 0
Optimization Model for CO2 Emission Tax of Power Plants Considering Tax Rebates under the Target of Carbon Emission Reduction 碳减排目标下考虑退税的电厂CO2排放税优化模型
Pub Date : 2022-07-28 DOI: 10.1109/ICPET55165.2022.9918315
Rui Wang, Xiaoxia Li
Levied CO2 emission tax on power plants is an effective way to realize China’s emission reduction targets, but it also will push up the price level and cause negative feedback on real economy. Introducing tax rebate mechanism is a good way to solve the problem above. Based on the concept aboved, and considering the oligopoly market structure at generation side, an optimization model for emission tax of power plants considering tax rebates and it’s embedded equilibrium model for power market was established in this paper. An example showed that the optimization model for emission tax of power plants proposed in this paper can conducive to the realization of energy-saving emission reduction targets and hold down power price level. The optimization model for emission tax proposed in this paper has practical significance.
对电厂征收二氧化碳排放税是实现中国减排目标的有效途径,但也会推高价格水平,对实体经济产生负反馈。引入退税机制是解决上述问题的一个很好的途径。基于上述概念,考虑发电侧寡头垄断的市场结构,本文建立了考虑退税的电厂排放税优化模型及其电力市场嵌入均衡模型。算例表明,本文提出的电厂排放税优化模型有利于实现节能减排目标,降低电价水平。本文提出的排放税优化模型具有现实意义。
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引用次数: 0
期刊
2022 4th International Conference on Power and Energy Technology (ICPET)
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