电网

In order to improve the power quality of distribution network system, one of the most effective methods is reactive power compensation. In this paper, the Distribution Static Synchronous Compensator for reactive power compensation was studied, and then the digital controller based on One-cycle control was designed. The waveforms of experimental device based on DSTATCOM of one-cycle control were given in this paper. It can be seen from the results that the fluctuation of DC capacitor voltage is lower, the dynamic response speed of DSTATCOM providing or absorbing reactive power is fast, and the accuracy of steady-state compensation can achieve the requirements of reactive power compensation in engineering basically

为了提高配电网系统的电能质量，对无功功率进行精确补偿是非常有效的方法之一；本文研究了配电网静止同步补偿器用于无功补偿，并设计了单周控制的数字控制器；文中给出了基于单周控制的DSTATCOM无功补偿试验装置工作过程中的波形曲线，从试验结果可见，本文设计的单周控制DSTATCOM无功补偿装置的直流侧电容电压在工作过程中波动较小，装置发出或者吸收无功功率的动态响应速度较快，稳态补偿精度基本能够达到工程中无功补偿的要求。

It developed a kind of portable over-voltage self-recording equipment,this equipment not only can memorize and manage power signal automatically but also can work agelong.

研制了一种便携式电网过电压记录系统，满足在信号记录、存储和数据处理上的自动化，并能在电网中长时间连续稳定的工作。

Usually, distribution networks operate in arborescence mode, so in the simulation of fault analysis the impact of faulty switch element on system reliability is apportioned to failure consequences of adjacent sections that connect to switch, and then an equivalent analytical model considering switch fault is proposed. Thus, not having to conduct the reliability analysis of switch element singly, the impact of switch element fault on system reliability can be calculated. Applying the proposed algorithm in RBTS-BDS6 system, RBTS-BUS4 system and actual medium-voltage distribution network to conduct reliability assessment, the results show that the proposed algorithm is superior in speed and possesses efficiency and engineering practicality.

配电网常具有树状运行特点，在故障解析模拟时，将开关元件故障对系统可靠性的影响分摊到连接开关的相邻分块的故障后果中，进而提出计及开关故障的可靠性等值解析模型，不需单独进行开关元件故障的可靠性分析即可计算其对系统可靠性的影响，应用该算法对RBTS-BUS6和RBTS-BUS4系统及实际中压配电网进行了可靠性评估，结果表明该算法有较明显的速度优势，具有高效性和工程实用性。

The fault arc characteritie of EHV transmission lines is investigated, the fault arc EMTDC model is set up, and the result of simulation confirms to the result of experiment.

考虑到EHV电网故障带有电弧的特点，利用电力暂态信号小波分析方法的研究结果，首次提出基于小波分析的EHV输电线路单端量暂态保护机理和实现方案，该保护原理能够实时检测EHV电网线路故障，区分区内外故障。

The optimization of power network planning and the selectees of the power transmission lines in all of the possible load conditions obtained from this method. Then according to the probability of the condition, the distribution network planning conclusion with good adaptability and reliability requirement is put forward.

采用多情景方法求得未来多种可能负荷情景下的电网最优规划方案，得到各待选线路在各情景下的被选情况，并根据各种情景可能出现的概率，提出依据电网可靠性要求和线路被选概率的大小选择各条待选线路，形成具有较好适应性的电网灵活规划方案。

The principle of the novel single-phase hybrid active power filter is described in detail. Based on the above analysis, Kalman filtering approach for estimation of harmonics is presented to improve the speed and precision of harmonic detection, and it also can avoid the influence made by voltage distortion on harmonic detection. A new current control strategy based on energy balance is presented to regulate the active part absorbing or releasing active power and control the inverter to produce current opposite to the harmonic current reflowing in injection branch, the above method combined with harmonic current tracking control that keeps the stabilization of dc-side voltage and improve the reliability of the system.

并详细分析了系统的滤波原理，提出了基于卡尔曼增益自调整的改进型动态谐波含量估计方法，能够快速准确的跟踪检测电网谐波电流，并且克服了电力机车等冲击性负荷引起的电网电压畸变对谐波检测精度的影响；提出了基于逆变器两侧能量平衡的电流控制方法使有源部分吸收或释放一定有功或无功功率及产生与注入支路回灌谐波电流相反的抑制电流，然后联合电网谐波电流跟踪控制以获得系统参考信号，保证了直流侧电压的稳定，提高了装置可靠性，增强了系统滤波性能。

The power generated by the project will be connected into 35KV bus side of booster substation with 22KV via 35KV box substation, and connected into 220KV bus of Chahar Right Middle Banner Desheng 220KV Substation in west Inner Mongolia via one 220KV trolley line that is set up by power grid company See

这项工程所产生的电能将与带有35KV的强力电网总线相连，此强力电网带有可以将22KV转换为35KV的箱式变压所。同时，产生的电能还将通过一条由电网公司建立的220KV高压电线，与内蒙古西部的察哈尔右翼中旗得胜乡220KV变电站的总线相连。

By means of analyzing the variation of operation parameters of Shanxi power grid such as voltage and frequency, the possible affects of fault trip of 1000kV transmission line on Shanxi power grid are summarized; and according to concrete situation of 1000kV transmission line, some corresponding control measures are put forward.

研究了1 000 kV线路故障跳闸后山西电网的运行情况，通过对山西电网的电压、频率等电气量变化情况的分析，总结出1 000 kV线路故障跳闸对山西电网可能造成的影响，并结合1 000 kV线路的具体情况，提出了有针对性的控制措施。

Writer also recommends the two partial distribution tariff could be the solution for the Beijing area and explains the theories and methodologies of the accounting cost and marginal cost based tariff making and introduces the tariff mechanism and method applied in other countries' electric market. The two partial price, i.e. capacity price and electricity price, is also simulated and performed mathematical calculation based on the figures from the Beijing power grid.

并在分析了基于会计成本和边际成本的输配电服务定价方法及国外电力市场中实际运行的输电价格机制和定价方法的基础上，结合北京地区电网特点，对其配电价格制定进行研究，确定采用两部制形式，明确容量电价和电量电价的理论依据和计算方法，并根据北京电网的数据，对于北京配电网的服务价格进行测算和敏感性与可行性分析。

This paper introduces the typical structure,especially the method of loop and the principle of subsection of Hangzhou distribution system,analyses the configuration of low voltage net.

介绍了杭州市电力局现行配电网的网架结构，着重就环网方式、分段原则以及低压配电网的布置进行了分析，提出了配电网设计的基本原

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。