九图

在多数变电站中，使用九区图作为控制策略。

In most substations , nine-section algorithm is used as control theory .

基于九区图的变电站电压无功控制策略的改进

Improvement of control strategy for wattless voltage in substation based on nine-zone diagram

根据传统九区图法的特点，设计了相应的控制规则。

According to the characteristic of nine-area diagram . the corresponding control ordination is designed .

九方图是在江恩分析中最特别的部分。

The Square of Nine can be considered as an exotic section in relation to Gann analysis .

同时在设计控制规则时，针对九区图特殊的几个区域之间的振荡现象，制定了相应的规则来避免振荡。

And the fuzzy system also have the special regular to eliminate the domain-swing between some special phenomenon .

基于模糊边界和双九区图的变电站电压无功控制策略研究

Study of voltage and reactive power integrative control strategy based on fuzzy boundary and double nine-area control method

现有变电站电压无功控制装置的控制策略主要是依据九区域图法。

The control strategy of existing voltage and reactive power controller in substation is mainly based on the nine-zone diagram method .

对九区图法进行了重点讨论，分析其控制原理，并指出存在的具体问题和改进方法。

Nine-Area focused on the analysis of the control principle , and pointed out that the specific problems and improved methods .

在此基础上，再采用九区图方法调整配电网的无功电压，进行迭代，逐层进行无功优化直到问题收敛。

This strategy adopts the hierarchical balance optimization of reactive power and improves the traditional " nine-zone diagram " control method .

在高压侧电压越限时采用双九区图控制策略，它能提高系统电压稳定性，保证变电站安全稳定运行。

When high voltage is abnormal , the strategy of double nine-area control can enhance stability of system voltage and safety of substation .

本文中，两个六点九边图的最大填充设计与最小覆盖设计被研究。

In this paper , the maximum packing design and minimun covering design of two graphs with six vertices and nine edges are researched .

该控制算法基于改进的九区图法实现，并在量测数据较差区域级无功电压控制策略无法实施时启动。

Based on an algorithm to alternately execute a recursive equivalence and an optimal matching injection flow searching , the regional-level control strategy is realized .

论文对电压无功控制技术及其发展和应用进行了研究，针对九区图控制法的缺陷，并结合变电站电压无功控制的实践经验，设计了电压无功综合控制的模糊推理系统。

In this thesis a fuzzy control system used in Voltage and Reactive Power auto regulatory device is designed based on the nine-zone controlling principle .

对基于九区图变电站电压无功控制策略进行分析，指出其控制策略存在的问题，并提出了相应的改进措施。

Analyzes the control strategy for wattless voltage in substation based on nine-zone diagram , points out the problems existing in control strategy and corresponding improvement measures .

该系统控制策略以九区图为基础，并且在容易引起频繁动作的边界上采用人工神经网络预测变压器分接头调节和电容器投切后的电压无功，以决定采用何种控制方式。

The control strategy is based on nine-zone diagram and combined with artificial neural network , which makes a decision about the change of transformer taps and capacitor switching .

与传统的九区图控制相比较，这种综合控制策略能提高变压器分接头使用寿命而不降低电压无功的控制效果。

Compared with the result of traditional nine-area control , this integrative control strategy can increase the service life of tap changer , without reducing the efficiency of voltage and reactive power control .

采用模糊控制技术，给出了变电站电压无功综合控制九区图中输入输出变量的模糊子集的定义，设计了一种变电站电压无功模糊控制系统。

Based on fuzzy control technology , the definition of fuzzy subset on input variable and output variable is presented , and a fuzzy control system is designed to realize substation Vol / Var Coordinated Control .

目前广泛使用的基于九区图电压无功控制策略，因为电压无功控制装置和控制策略的矛盾，在实际运行中暴露出严重的问题。

Now widely used based on the " nine-zone " reactive power control strategy , because the voltage and reactive power control devices and control strategies of the contradictions in the actual operation has revealed a serious problem .

该系统根据变电站电压无功综合控制九区图的特点给出了各输入输出变量的模糊子集和隶属度函数的定义，并设计了相应的控制规则。

According to the characteristic of nine-area diagram of substation vol / var coordinated control , this system gives the defination of fuzzy sets and the degree of membership of input / output variables , and designs corresponding control rules .

该控制系统以调控单元为最小控制单元，针对变电站实际运行情况形成不同的调控单元，通过改进的九区图算法，及时准确地给出调控策略进行控制。

The regulating unit is the smallest unit of this control system . Basing of the actual operation in a substation , there forms a lot of different control units . Through the improvement of the nine-zones algorithm , this system control the strategy timely and accurately .

采用九区图控制策略的电压无功综合控制，实际运行时存在着频繁调节变压器分接头和投切电容器组的缺陷，甚至可能会出现震荡现象。

At present , the existing voltage and reactive power controls adopt the control strategy of nine-area plot method widely . However , in the practice , the method has the defect of too frequent adjustment of the transformer taps and the switching of the capacitor bank .

敦煌写本宅经P.3594九方色图试释

An Interpretation of the Nine-square Color Diagram in " Dun Huang Xie Ben Zhai Jing " P.3594

在对以往的控制策略进行论述的基础上，针对现行控制策略的不足进行了综合分析，提出了一种新的控制策略：将原有九区状态图的九个区增加为十三个区。

Based on the discussion of the control strategy formerly used , the disadvantage of actual control strategy is analyzed , and a new kind of control strategy is proposed , which increases diagram of nine zones to thirteen zones .

你从哪里看出永和九年那张图“第三波是最小的一个”呢？

Third wave is the minimum one , it is never allowed .