<正>在国家电网公司2006年安全生产工作的专题讲座中,杜邦公司的安全顾问提出:“在多数情况下,人员伤亡和生产事故都是由不安全的行为造

The paper introduces status quo of Langfang 110 kV grid,analyzes many factors currently influencing and restricting grid development,and presents seven problems of the grid such as network frame weakness,inflexible operating modes and the scarcity of 220 kV power sources and so on.Some measures to solve these problems are presented in this paper,which are good for the development of regional economy.

通过对近几年廊坊电网发生的设备事故和一类障碍的统计分析,发现了设备事故和一类障碍的发生呈现一定的季节特点和专业差异;找出了引发设备事故和一类障碍的四大原因.建议通过改变思想认识,查找规律,加大工作力度等措施,努力减少设备事故和一类障碍的发生.

Based on the introduction of reactive power compensation measures taken in Shenfang distribution system of Langfang grid,this paper analyzes the weaknesses of the system operation and the causes of reactive power scarcity such as user's substation and private line substation lack of investigation,capacitor banks damage can't be repaired.Finally the suggestions to resolve the compensation problems are proposed.

A practical ride-through schemebased on super capacitor energy storage system for ASD(Adjustable Speed Drive) equipment is presentedin this paper.The topology of ASD adoptsAC-DC-AC structureand 12 pulses diode rectifier as input interface.Super capacitor(SC) module connects inverter DC bus to support DC voltage while power quality problems such as voltage drop or short-term outage take place in power source.A SC energy storage system based 15kVA ASD prototype was developed.Digital simulation and physical experiments were carried out to verify the correctness and validity of proposed ASD ride-through topology and control strategies.