Regulating mode selector scheme for an electric power converter
阅读：355发布：2022-02-11
专利汇可以提供Regulating mode selector scheme for an electric power converter专利检索，专利查询，专利分析的服务。并且In an electric power delivery system, means is provided for controlling the operation of a static power converter as a function of the magnitude and the polarity of a variable bipolar control signal. The control signal in turn is a function of a selected one of a plurality of variable bipolar input signals which respectively depend on the differences between actual and desired magnitudes of a plurality of different quantities dervied from the system. To select the proper input signal, first means is provided for deriving an output signal whose value depends on the most positive ranking signal in a first set of at least two of said input signals, second means is provided for deriving a resultant error signal which is representative of the most negative signal in a group consisting of the aforesaid most positive one signal and any signal in a second set of at least another of said input signals, and means is connected to the second means for producing the control signal which responds to variations of said resultant error signal.，下面是Regulating mode selector scheme for an electric power converter专利的具体信息内容。
1. In an electric power delivery system comprising a plurality of controllable electric valves connected between a-c and d-c electric power conductors and means for cyclically firing said valves in a predetermined sequence and at firing angles that can be varied to control the flow of power between said a-c and d-c conductors, said firing means being operative to vary said firing angles as a function of the magnitude and the polarity of a variable bipolar control signal, improved means for supplying said control signal comprising: a. a source of at least three variable bipolar input signals which respectively depend on the differences between actual and desired magnitudes of a plurality of different quantities of said system, the relative polarity of each of said input signals being positive if the actual magnitude of the relevant quantity is less than desired and being negative if the actual magnitude is more than desired; b. first value ranking means responsive to a first set of two or more of said input signals for providing an output signal whose magnitude depends on that signal in said first set having the most positive value; c. second value ranking means responsive to both said output signal and a second set of at least another one of said input signals for deriving a resultant error signal which is representative of the more negative one of a group of signals consisting of a selected signal in said second set and said most positive signal in said first set; and d. means connected to said second value ranking means for producing the control signal which responds to variations of said error signal by causing said firing means to advance or to retard the firing angle as necessary to minimize said error signal.
2. The improved control signal supplying means of claim 1 wherein said source includes bias means for increasing in a negative sense the magnitude of one of the input signals in said first set whenever the actual magnitude of a system quantity on which an input signal in said second set depends exceeds a predetermined magnitude.
3. The improved control signal supplying means of claim 1 wherein the system quantity on which an input signal in said second set depends is the valve firing angle, and said source includes bias means for increasing in a negative sense the magnitude of one of the input signals in said first set whenever the actual firing angle is more advanced than a predetermined angle.
4. The improved control signal supplying means of claim 1 wherein said second value ranking means includes a high-gain amplifier, said resultant error signal being taken from the output of said amplifier, and wherein there is connected between said amplifier output and said source at least three separate feedback circuit means for respectively in fluencing the values of said input signals as different functions of the value of said error signal.
5. The improved control signal supplying means of claim 1 wherein said source comprises at least first, second, and third means for respectively deriving said input signals from said different quantities of said system, wherein said second value ranking means includes a high-gain amplifier from whose output said resultant error signal is taken, and wherein feedback means are connected between said amplifier output and said source for influencing the value of the input signal derived by said first means as a first function of the value of said error signal, for influencing the value of the input signal derived by said second means as a second function of the value of said error signal, and for influencing the value of the input signal derived by said third means as a third function of the value of said error signal.
6. The improved control signal supplying means of claim 1 wherein said first value ranking means comprises a first differential amplifier whose output current varies inversely with said most positive signal in said first set, wherein said second value ranking means comprises (i) a second differential amplifier whose output current varies inversely with said selected signal in said second set and (ii) a high-gain amplifier supplied with the sum of said output currents, and resultant error signal being taken from the output of said amplifier, and wherein feedback means is connected between said amplifier output and said source for varying said input signals so as to maintain the sum of said output currents substantially constant.
7. The improved control signal supplying means of claim 1 wherein said selected signal in said second set is the most negative one signal in that set.
8. In an HVDC electric power delivery system comprising a plurality of controllable electric valves connected in a bridge configuration between a-c and d-c electric power conductors and means for cyclically firing said valves in a predetermined sequence and at firing angles that can be varied to conTrol the flow of power between said a-c and d-c conductors, improved regulating means comprising: a. a source of at least first, second, and third varaible bipolar input signals which respectively depend on the differences between actual and desired magnitudes of a plurality of different quantities of said system, the relative polarity of each of said input signals being positive if the actual magnitude of the relevant quantity is less than desired and being negative if the actual magnitude is more than desired; b. bias means for increasing in a negative sense the magnitude of said first input signal whenever the actual valve firing angle is more advanced than a predetermined angle; c. selector means connected to said source for deriving a resultant error signal which is representative of the more negative of either said third input signal or the more positive one of said first and second input signals; and d. means responsive to said error signal for controlling said firing means in a manner which varies said firing angle so as to reduce the value of said more negative signal toward zero.
9. The improved regulating means of claim 8 in which said first input signal depends on the minimum margin angle of the respective valves, said second input signal depends on the current in said d-c conductors, and said third input signal depends on the valve firing angle.
10. The improved regulating means of claim 8 wherein said selector means comprises first value ranking means supplied with at least said first and second input signals for providing an output signal whose magnitude is determined by whichever one of the input signals supplied thereto has the most positive value, and second value ranking means responsive to said output signal and to said third input signal for selecting the more negative of either said one signal which has the most positive value or said third signal and for deriving said resultant error signal from the selected signal.
11. In a method of regulating a converter in an HVDC electric power delivery system, said converter comprising a plurality of controllable electric valves connected in a bridge configuration between a-c and d-c electric power conductors and means for cyclically firing said valves in a predetermined sequence and at firing angles that can be varied, the steps of: a. deriving from several different quantities of the system and of the converter a plurality of error signals which reflect the differences between actual and desired values of the respective quantities; b. first selecting from among at least two different ones of said error signals the one signal that reflects the lowest actual value of the relevant quantity compared to the desired value thereof; c. further selecting from a group of signals consisting of said first selected error signal and at least a third one of said error signals the one signal that reflects the highest actual value of the relevant quantity compared to the desired value thereof; d. using said further selected error signal for controlling said firing means in a manner which varies said firing angle so as to reduce the value of said further selected signal toward zero; and e. rejecting all of the error signals other than said further selected one.
12. In a method of regulating a converter in an HVDC electric power delivery system, said converter comprising a plurality of controllable electric valves connected in a bridge configuration between a-c and d-c electric power conductors and means for cyclically firing said valves in a predetermined sequence and at firing angles that can be varied, the steps of: a. deriving a plurality of error signals whose values are respective representative of any differences between actual and desired values of various quantities of the system and of the converter; b. comparing the values of at least first and second ones of said error signals to determine which of them ranks most positive; c. comparing the vaLues of at least a third one of said error signals and the most positive one of said first and second error signals to determine which one of these values ranks most negative; and d. deriving a resultant error signal indicative of that error signal whose value is the most negative ranking one for controlling said firing means in a manner that varies said firing angle so as to reduce said most negative value toward zero.
13. The method according to claim 12 including an additional step of modifying the respective values of said plurality of error signals as different functions of the value of said resultant error signal.
14. The method according to claim 12 including an additional step of modifying said first error signal by increasing its negative value whenever the actual magnitude of the quantity from which said third error signal is derived exceeds a predetermined magnitude.
| 标题 | 发布/更新时间 | 阅读量 |
|---|---|---|
| 一种级联变换器自适应不对称死区时间的控制系统 | 2020-05-08 | 450 |
| 直流-直流转换器 | 2020-05-12 | 513 |
| 零差相干探测中宽范围快调谐三级复合轴锁相方法及结构 | 2020-05-08 | 374 |
| 用于巨型光转换的全硅光电转换器的生产工艺 | 2020-05-11 | 400 |
| 霍尔传感器电路、电机控制系统和霍尔元件感测方法 | 2020-05-12 | 194 |
| 电感型开关电源转换器的负载电流检测方法及电路 | 2020-05-11 | 232 |
| 电流监测信号的热梯度校正 | 2020-05-11 | 110 |
| 无电阻器预充电 | 2020-05-11 | 747 |
| 一种多向功率流隔离式多端口变流器 | 2020-05-11 | 310 |
| 一种用于接地网缺陷诊断的探测设备 | 2020-05-12 | 743 |
高效检索全球专利专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台，是提供专利分析，专利查询，专利检索等数据服务功能的知识产权数据服务商。
我们的产品包含105个国家的1.26亿组数据，免费查、免费专利分析。
分析报告
专利汇分析报告产品可以对行业情报数据进行梳理分析，涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度，系统通过AI智能系统对图表进行解读，只需1分钟，一键生成行业专利分析报告。
两级功率转换器热门专利
QQ群二维码
意见反馈
意见反馈