【作者】 赵义亮；

【导师】 张粒子；

【作者基本信息】 华北电力大学 ， 电力系统及其自动化， 2001， 硕士

【摘要】 电压/无功优化控制是保证电力系统安全、经济运行的一项有效手段，是提高电压质量的重要措施，因此研究地区电网的电压/无功控制策略，既具有理论意义，又具有实际应用价值。 本文根据地区电网的特点，提出了电压校正算法和无功优化算法来获得电压/无功控制策略。主要工作如下： 在电压校正方面，结合调度员处理电压越限的经验，提出基于变电站的电压校正算法，其计算速度快，但仅适用于变电站低压侧母线电压越限的情况。利用P-Q的解藕特性以及将变压器、电容器处理成节点无功注入电流的形式，计算各控制设备的有效系数（变压器或电容器组的最大校正量），在各控制设备之间按比例分摊电压偏移量，提出基于灵敏度分析的电压校正算法，适用于电网中任何母线越限的情况，计算速度较快。 在无功优化方面，作者以网损增量最小为目标函数，考虑负荷的静态特性，将变压器等值成节点无功注入的形式，编制了基于改进直接法的无功优化软件。 将电压校正和无功优化相结合，提出电压/无功实时控制的新思路。 将上述算法应用于IEEE30节点的电压/无功控制，计算结果达到了预期的效果。并应用于某地区电网的电压/无功控制，取得了令人满意的效果。更多还原

【Abstract】 ABSTRACTVoltage and reactive power control is a effective measure to keep power system safety and economic, and a important method to improve voltage profile. It is valuable to study the problem of voltage and reactive power control.According to the characteristic of local networks, the algorithm of voltage correcting and reactive power operating optimization are presented in this paper. The corresponding software is also developed. The main research work can be descried as follows:The algorithm of voltage correcting based substation is presented with Expert experience. It is suitable to the voltage violation of substation low bus and calculates fast. A new modal base sensitivity analysis is put forward. It calculates faster and is suitable to the voltage violation of any bus. It applies P-Q decoupling and disposes transformer and capacity to node reactive current inject to compute efficiency coefficients(ECs) . And control variables are coordinated in proportion to their respective ECs.An improved direct method of reactive power optimization is presented in this paper. Its mathematical modal is formed with minimum loss increment as objective function. Transformer is equivalent to node reactive power inject.On base of voltage correcting and reactive power optimization, a new scheme of real-time voltage and reactive power control is presented.The proposed algorithms are applied to the IEEE 30-bus system and an actual electric network. The validaty and efficiency are confirmed by the numerical results.更多还原