Considering the running performance of 500kVar/10KV SSSC,the author has introduced one full digital control system.The control circuit of high potential and design scheme of valve base electronics are both presented,in addition,the working principle and component of unit controller are analyzed in detail,the structure and function of valve base electronics are also given in this paper.

Residential fan loads such as electric fan, oil-smoke absorbing fan and so on, which are rotating devices though, and the transient process of which is very short, can be treated as static loads in conventional stability analysis of electric power system. This paper describes the static load models of fan loads by test results.

A mathematical model of single-phase capacitor run asynchronous motor, considering saturation characteristics of the motor, is presented in this paper. The experimental method and algorithm for testing and measuring the parameters of this kind of loads are systematically proposed. Model parameters of clothes washer type motors could be gained by experiments. The model and its parameters provide the foundation for the analysis and study of power system stability.

The article has done some research related to residential heating and wetting devices, which has built static load model. This article addressed second-step approaching arithmetic based on dispersing Fourier transform first time that established corresponding static load model, especially for external characteristic load of devices such as induction cooker, PTC warming fan andmicro-wave oven.

This paper presents the basic working principle and electrical circuit structure of switch power supply firstly.Based on that,static load model,which is related to electronic devices such as computers and TVs and so on,has been established through the experimental research.The conclusion drawn from the paper provides the proof for analysis and calculation of power system stability.

介绍了一种用于有源电力滤波器(Active Power Filter,APF)实时监控与保护的计算机监控系统.该系统运用VC++的多线程编程技术,实现了高速不间断采样和实时数据处理的多任务并行机制,从而能对APF系统进行高采样率的谐波分析和更完整可靠的故障实时报警、滤波.此外,软件设计中引入DAQBench工控ActiveX组件,加强了监控软件界面与功能的专业性.

本文针对常用的照明用电设备包括白炽灯和气体放电灯,进行了试验研究。在此基础上,采用最小二乘法建立了照明负荷随电压变化的静态负荷模型。该类负荷模型为电力系统负荷集结及等值,进而为电力系统的稳定分析和研究奠定了基础。

介绍了一种用于有源电力滤波器(Active Puwer Filter-APF)的计算机实时监控系统.该系统运用VC++的多线程编程技术,实现了不间断采样和实时数据处理的高速并行操作,从而能对APF系统进行高采样率的谐波分析和更完整可靠地故障实时录波,具有较高的实时性.此外,软件设计中引入DAQBench工控ActiveX组件,加强了监控软件界面与功能的专业性.实验表明,此监控系统能对APF进行有效的监控和保护,提高了APF系统的可靠性与自动化水平.

本文介绍了采用多重化主电路设计、基于离散傅立叶变换(DFT)谐波检测方法的100kVA并联型有源电力滤波器的研制情况.文章对并联型有源电力滤波器补偿谐波与无功电流的工作原理进行了分析,论述了选择DFT作为电流检测算法的优点,并对采用二重化方法设计的主电路结构以及相应控制策略的实现方法进行了介绍,最后给出了实验结果.实验证明,该系统满足设计要求,补偿效果良好.

随着我国电力系统的不断发展,电力系统的无功问题及动态电压稳定问题日益凸显,高压大容量新型静止无功发生器(static synchronous compensater,STATCOM)是解决上述问题的强有力手段.文中详细地介绍了我国首台±20 Mvar STATCOM工业样机的基本原理、主电路结构、纯水冷却系统、保护控制系统及监测系统.最后介绍了±20 Mvar STATCOM装置的现场运行情况,根据现场记录的数据给出了装置的运行率、计划停运率及强迫停运率,并对装置运行中出现的问题给出了分析.±20 Mvar STATCOM工业样机的开发经验及现场运行经验对高压大容量STATCOM装置的产业化有重要的价值.

Due to the separate phase control capability, low output current harmonics and fast response characteristics, cascade inverters based STATCOM is suitable for balancing compensation of 3-Ph unbalanced load. Main circuit configuration and integrated voltage-reactive power control scheme for balancing compensation with cascade inverters based STATCOM is proposed. The 3-Ph compensation current is obtained through vector transform with symmetrical weight method. The single phase reactive power is calculated with single phase instantaneous reactive power concept. Selective harmonics eliminated PWM (SHE-PWM) is employed to ensure that the THD of output current is less than 5% and the DC voltage is controlled. Simulation results verify the effects of the fast response of output reactive power for balancing the unbalanced load.

指出了在STATCOM(Static Synchronous Compensator,静止同步补偿器)控制器设计过程中面临的多控制目标协调问题.除了快速的电压支撑功能以外,STATCOM在电力系统中还应该起到提高暂态稳定极限,阻尼功率振荡等作用.本文从理论分析和数字仿真两方面分析了这些控制目标的矛盾并指出了在各种状态下STATCOM控制器设计的原则,即根据当前时刻系统的状态确定主要的控制目标.在不严重损害其它目标的实现的前提下尽可能提高该控制目标要求的性能.本文根据这些原则设计了STATCOM的协调控制器.数字仿真表明该方法可取得满意的控制效果.

文章针对静止同步补偿器面临的非线性、多目标控制问题，应用直接反馈线性化、内模控制和最优控制理论，并利用合成电势矢量法，设计了可以同时提高系统阻尼与电压控制精度的ＳＴＡＴＣＯＭ非线性控制器。利用ＰＳＡＳＰ软件包对单机－无穷大系统进行的数字仿真表明，该控制器优于常规ＰＩ控制器。

提出了一种控制ＡＳＶＧ（ａｄｖａｎｃｅｄｓｔａｔｉｃｖａｒｇｅｎｅｒａｔｏｒ）驱动脉冲的方法使ＡＳＶＧ装置发出正序电压的同时也产生负序电压，以抵消系统负序电压分量，抑制流过ＡＳＶＧ的负序电流。并用“开关函数”建模法给出了具体的控制算法。用该控制算法可使ＡＳＶＧ在系统出现１５％的负序电压时仍能正常地工作而不过流，仿真结果表明了理论分析和控制算法的正确性

ＡＳＶＧ（ＡｄｖａｎｃｅｄＳｔａｔｉｃＶａｒＧｅｎｅｒａｔｏｒ）装置是利用可关断开关器件ＧＴＯ构成的新型无功发生装置。作者应用“开关函数法”，给出了ＡＳＶＧ的暂态模型。并用新模型得出了直流侧以电容为电压支撑元件的ＡＳＶＧ输出的稳态无功功率只与δ角有关而与θ角无关的结论。还研究了ＡＳＶＧ的响应速度与参数的关系，给出了ＡＳＶＧ变压器漏抗对其电容电压变化的影响。仿真与３００ｋｖａｒ工业样机实验结果的一致证明了模型的正确。这种建模方法也适用其它开关电路的建模。根据ＡＳＶＧ稳态模型，还提出了一种新型的逆系统非线性ＰＩ控制方法，该方法能使ＡＳＶＧ具有很快的响应速度