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1. 发明授权

US11355961B2 Method and system for fast reconfiguration of power supply network in tens of milliseconos after power grid failure 有权
公开(公告)号：US11355961B2
公开(公告)日：2022-06-07
申请号：US16945611
申请日：2020-07-31
申请人： BEIJING SIFANG AUTOMATION CO., LTD. , BEIJING SIFANG ENGINEERING CO., LTD.
发明人： Gang Duan , Xiaonan Lou , Qi Zhang , Yuhan Zhang , Nian Liu , Liangliang Zheng
IPC分类号： H02J13/00
摘要： The disclosure provides a method for fast reconfiguration of power supply grid in tens of milliseconds after power grid failure. The master station of fast reconfiguration of power grid concentrates the network status information from the client stations at transformer substations or power plants, and compares it with the built-in control strategy table which deals with possible faults. When an expected power gird disconnection fault is detected, the pre-start switch-on instruction is sent to the client stations with multiple breakers which can reconnect the grid. When the fault is cleared, the client stations shall identify the fault clearing time according to the local information, and send the instruction of synchronous switch-on to the corresponding local breakers which can reconnect the separated grids. At the same time, the master station independently monitors the removal of the fault, and sends the backup switch-on signal with synchronism check to the corresponding breakers which can reconnect the separated grids. Based on the above mechanism, the disconnected grid can be reconnected within 150 ms after disconnecting. After the interconnection of the grid is restored, the breakers that form the electromagnetic ring network switch off.

2. 发明授权

US11303128B2 Suppression method of high-frequency resonance for VSC-HVDC system based on nonlinear filter in voltage feed-forward control 有权
公开(公告)号：US11303128B2
公开(公告)日：2022-04-12
申请号：US16484526
申请日：2019-02-22
申请人： BEIJING SIFANG AUTOMATION CO., LTD. , BEIJING SIFANG ENGINEERING CO., LTD.
发明人： Bin Liu , Fengmei Cao , Shu Liu , Hongming Mei , Zhichao Liu , Hongxia Qin , Xiaoyu Zhang , Hualong Yu , Xianchao Guo , Jing Wen
IPC分类号： H02J3/24 , H02J3/36
摘要： A suppression method of high-frequency resonance for VSC-HVDC (Voltage Source Converter-High Voltage Direct Current Transmission) system based on nonlinear filter in voltage feed-forward control. It includes that the nonlinear filter is used for the voltage feed-forward link in the current inner loop control. The specific method is to extract each sequence component of the AC (Alternating Current) voltage, calculate the average value of the sequence component at N sample points, compare the current average value with the output result of nonlinear filter in the previous period, and output the result of nonlinear filter in the current period. After corrected, the result is a fixed value varying according to gradient which acts on the voltage feed-forward link of the inner loop. The invention can effectively suppress the high frequency resonance caused by impedance matching between VSC-HVDC system and grid system without losing the rapidity, and at the same time, it can adjust with AC voltage when voltage disturbance such as AC fault occurs, so as to reduce the risk of over-current of the converter valve. At present, the invention only needs to be realized in the secondary control software link without adding a new equipment, which is also low cost, no occupancy of land and convenient for engineering practice.

3. 发明授权

US09178386B2 State-matrix-independent dynamic process estimation method in real-time for weakly observable measurement nodes without PMU 有权
标题翻译：对于弱PMI测量节点，实时状态矩无关动态过程估计方法
公开(公告)号：US09178386B2
公开(公告)日：2015-11-03
申请号：US13497512
申请日：2009-12-09
申请人： Gang Duan , Jingtao Wu , Xiaoyan Sun , Dong Yang
发明人： Gang Duan , Jingtao Wu , Xiaoyan Sun , Dong Yang
IPC分类号： H02J13/00 , G01R19/25
CPC分类号： H02J13/0006 , G01R19/2513 , Y02E60/728 , Y02E60/74 , Y04S10/265 , Y04S10/30
摘要： A state-matrix-independent dynamic process estimation method in real-time for weakly observable measurement nodes without Phasor Measurement Unit(PMU) is only dependent on real-time measurement dynamic data of measurement nodes with PMU and measurement data of Supervisory Control And Data Acquisition (SCADA) system in electric power system or state estimation data. According to the SCADA measurement data or state estimation data at some continuous moments, the method utilizes recursive least squares solution to find a linear combination relationship between variation of measurement parameter to be estimated of nodes without PMU and variation of corresponding measurement parameter of nodes with PMU. Using the linear combination of relationship, the dynamic process of measurement nodes without PMU is estimated in real-time. The method provides high estimation precision and meets error requirements of engineering application.
摘要翻译：弱相关测量单元（PMU）的弱观测测量节点的状态矩无关动态过程估计方法仅取决于PMU测量节点与监控和数据采集测量数据的实时测量动态数据（SCADA）系统或状态估计数据。根据SCADA测量数据或某些连续时刻的状态估计数据，该方法利用递归最小二乘解求解PMU节点测量参数变化与PMU节点对应测量参数变化之间的线性组合关系。使用线性关系的组合，实时估计无PMU的测量节点的动态过程。该方法提供高估计精度，满足工程应用的误差要求。

4. 发明申请

US20150137620A1 ANTI-INTERFERENCE SWITCH SIGNAL TRANSMISSION CIRCUIT 有权
标题翻译：抗干扰开关信号传输电路
公开(公告)号：US20150137620A1
公开(公告)日：2015-05-21
申请号：US14405449
申请日：2013-08-23
申请人： Beijing Sifang Automation Co., Ltd.
发明人： Gang Xu , Tao Zhang , An Liu , Qiurong Chen , Wenhao Shi
IPC分类号： H01H47/00
CPC分类号： H01H47/00 , H01H47/001 , H01H47/002 , H01H71/04 , Y10T307/937
摘要： An anti-interference switch signal transmission circuit, in which a changeover contact is used at a signal terminal, wherein a normally closed contact is connected to DC−, a normally open contact is connected to DC+, and a common terminal is connected to a switch signal acquisition circuit. When no signal exists, DC− is connected to a positive input terminal of the switch signal acquisition circuit via the normally closed contact. Since a negative input terminal of the switch signal acquisition circuit is also connected to DC−, even if interference is caused, no false signal is generated. When a signal exists, the position of the changeover contact changes and DC+ is connected to DC− via the closed normally open contact through the switch signal acquisition circuit thus a loop is formed, so that the signal can be reflected. The interference problem is solved by connecting both the two terminals of the acquisition circuit to DC− when no signal exists.
摘要翻译：一种抗干扰开关信号传输电路，其中在信号端子处使用转换触点，其中常闭触点连接到DC-，常开触点连接到DC +，并且公共端子连接到开关信号采集电路。当没有信号时，DC-通过常闭触点连接到开关信号采集电路的正输入端。由于开关信号采集电路的负输入端子也连接到DC-，即使产生干扰，也不会产生假信号。当存在信号时，转换触点的位置变化，并且DC +通过开关信号采集电路通过闭合常开触点连接到DC-，从而形成环路，从而可以反射信号。当没有信号存在时，通过将采集电路的两个端子连接到DC-来解决干扰问题。

5. 发明授权

US10784389B2 Full-laser scribing method for flexible stainless steel substrate solar cell module 有权
公开(公告)号：US10784389B2
公开(公告)日：2020-09-22
申请号：US16313215
申请日：2016-12-28
申请人： Beijing Sifang Crenergey Optoelectronics Technology Co., Ltd. , Beijing Sifang Automation Co., Ltd
发明人： Ning Zhang , Xinping Yu , Wanlei Dai , Yuandong Liu , Wei Zhang , Zhe Sun
IPC分类号： H01L31/0392 , H01L31/18 , H01L31/0463 , B23K26/402 , B23K26/361
摘要： The invention relates a full-laser scribing method for a flexible stainless steel substrate solar cell module, comprising: preparing an insulating layer and a molybdenum layer on a stainless steel substrate in sequence; using a laser I to scribe the prepared insulating layer and molybdenum layer to form a first scribed line (P1); preparing the following film layers in sequence on the molybdenum layer in which P1 has been scribed: a CIGS layer, a cadmium sulfide layer and an intrinsic zinc oxide layer; using a laser II to make scribe and thus form a second scribed line (P2), wherein the second scribed line P2 is parallel with the first scribed line P1; and preparing an aluminum-doped zinc oxide layer on the intrinsic zinc oxide layer in which P2 has been scribed, and using a laser III to make scribe and thus form a third scribed line (P3), wherein the third scribed line P3 is parallel with the first scribed line P1. The invention may avoid disadvantages caused by the screen printing, such as large dead zone, expensive screen printing paste and frequent replacement of screens for screen printing, thereby improve efficiency and stability of the module and save cost and increase production efficiency.

6. 发明申请

US20190237600A1 FULL-LASER SCRIBING METHOD FOR FLEXIBLE STAINLESS STEEL SUBSTRATE SOLAR CELL MODULE 审中-公开
公开(公告)号：US20190237600A1
公开(公告)日：2019-08-01
申请号：US16313215
申请日：2016-12-28
申请人： Beijing Sifang Crenergey Optoelectronics Technology Co., Ltd. , Beijing Sifang Automation Co., Ltd
发明人： Ning Zhang , Xinping Yu , Wanlei Dai , Yuandong Liu , Wei Zhang , Zhe Sun
IPC分类号： H01L31/0392 , H01L31/18 , H01L31/0463
CPC分类号： H01L31/03928 , B23K26/361 , B23K26/402 , H01L31/03923 , H01L31/0463 , H01L31/186 , H01L31/1876 , Y02P70/521
摘要： The invention relates a full-laser scribing method for a flexible stainless steel substrate solar cell module, comprising: preparing an insulating layer and a molybdenum layer on a stainless steel substrate in sequence; using a laser I to scribe the prepared insulating layer and molybdenum layer to form a first scribed line (P1); preparing the following film layers in sequence on the molybdenum layer in which P1 has been scribed: a CIGS layer, a cadmium sulfide layer and an intrinsic zinc oxide layer; using a laser II to make scribe and thus form a second scribed line (P2), wherein the second scribed line P2 is parallel with the first scribed line P1; and preparing an aluminum-doped zinc oxide layer on the intrinsic zinc oxide layer in which P2 has been scribed, and using a laser III to make scribe and thus form a third scribed line (P3), wherein the third scribed line P3 is parallel with the first scribed line P1. The invention may avoid disadvantages caused by the screen printing, such as large dead zone, expensive screen printing paste and frequent replacement of screens for screen printing, thereby improve efficiency and stability of the module and save cost and increase production efficiency.

7. 发明授权

US09679726B2 Anti-interference switch signal transmission circuit 有权
公开(公告)号：US09679726B2
公开(公告)日：2017-06-13
申请号：US14405449
申请日：2013-08-23
申请人： Beijing Sifang Automation Co., Ltd.
发明人： Gang Xu , Tao Zhang , An Liu , Qiurong Chen , Wenhao Shi
IPC分类号： H01H47/00 , H01H71/04
CPC分类号： H01H47/00 , H01H47/001 , H01H47/002 , H01H71/04 , Y10T307/937
摘要： An anti-interference switch signal transmission circuit, in which a changeover switch is used at a signal terminal, is disclosed. A normally closed contact is connected to DC−, a normally open contact is connected to DC+, and a common contact is connected to a switch signal acquisition circuit. When no signal exists, DC− is provided to a positive input terminal of the switch signal acquisition circuit via the normally closed contact. Since a negative input terminal of the switch signal acquisition circuit is also connected to DC−, even if interference is caused, no false signal is generated. When a signal exists, the position of the changeover switch changes and DC+ is connected to DC− via the closed normally open contact through the switch signal acquisition circuit thus a loop is formed, so that the signal can be detected.

8. 发明授权

US08150556B2 Method of coordinated operation for turbine-generator shafts torsional vibration protection 有权
标题翻译：涡轮发电机轴扭转振动保护协调运行方法
公开(公告)号：US08150556B2
公开(公告)日：2012-04-03
申请号：US12529645
申请日：2008-04-30
申请人： Shaohua Jiao , Tao Zhang , Quan Liu , Xinyan Liang , Yuansheng Li
发明人： Shaohua Jiao , Tao Zhang , Quan Liu , Xinyan Liang , Yuansheng Li
IPC分类号： G05D3/12 , F03D11/00 , H02P9/00 , H02P9/14 , H02P9/04
CPC分类号： F02C9/00 , F01D21/003 , F05D2260/80 , F05D2260/96
摘要： The present invention relates to the coordinated control method of torsional stress relay in large thermal power plants' generators (300 MW and above), which will be adopted when shaft torsional oscillations occur. This invention also publishes a method of realizing selective trip the generators and the trip criterions which are implemented by the torsional stress relay and coordinated control master station (Tmaster). Tmaster will real-time monitor the operating status of the generators and TSR, TMaster will also real-time generate a trip priority level sequencing by analyzing the unit output.When generators occur subsynchronous resonance and shaft torsional oscillation, this method can ensure that TSR will trip some generators of the power plant according to the real-time generated trip strategy to inhibit the shaft torsional oscillation and safeguard the units. This method can also avoid the tremendous economic loss caused by tripping all the generators, and that will reduce the hazard to the transmission grid.
摘要翻译：本发明涉及大型火力发电机（300MW以上）中的扭转应力继电器的协调控制方法，这将在轴扭转振荡发生时采用。本发明还公开了一种实现选择性跳闸发电机的方法和由扭转应力继电器和协调控制主站（Tmaster）实现的跳闸准则。泰玛特将实时监控发电机和TSR的运行状态，TMaster还将通过分析单位输出实时生成跳闸优先级排序。当发电机发生次同步谐振和轴扭转振荡时，该方法可以确保TSR根据实时产生的跳闸策略跳闸发电机的一些发电机，以抑制轴扭转振荡并保护机组。这种方法也可以避免所有发电机跳闸造成的巨大经济损失，从而减少对输电网的危害。

9. 发明授权

US09871893B2 Method for making 32-bit addressing of SV data by utilizing FPGA 有权
公开(公告)号：US09871893B2
公开(公告)日：2018-01-16
申请号：US14652516
申请日：2013-10-28
申请人： Beijing Sifang Automation Co., Ltd
发明人： Zhengqiang Xiao , Zhiguang Hou , Haitao Yuan , Jiong Hu , Tao Zhou , Qiurong Chen , Wanfang Xu , Kun Xiao , Tongzhong Fang
IPC分类号： H04L29/06 , H04L12/741
CPC分类号： H04L69/08 , H04L45/74 , H04L69/22
摘要： This invention relates to a method for making 32-bit addressing of SV data by utilizing FPGA, which may be applied to processing digital sampling data in an equipment of an intelligent substation. Specifically, the method includes the following steps: FPGA receiving naked SV data packages generated based on IEEE802.3 standard; analyzing data structure of Ethernet frame; based on characteristics of the Ethernet frame of the SV data, the SV data of the network byte sequence being reorganized by utilizing ASN.1 coding rules, so that the SV data being converted into a data that can be directly accessed by 32-bit addressing processors. As a result, SV data decoding efficiency is improved greatly. This invention may make the decoding efficiency of 32-bit addressing processor improved by 5-10 times, thus solve problem of declined efficiency due to processing network byte order by splitting and reorganization.

10. 发明授权

US09748676B2 Electrical connector 有权
公开(公告)号：US09748676B2
公开(公告)日：2017-08-29
申请号：US14917998
申请日：2014-11-05
申请人： Beijing Sifang Automation Co., Ltd
发明人： Zaolin Han , Guanwen Hu , Hui Meng , Lixiang Guo
IPC分类号： H01R9/22 , H01R9/24 , H01R9/18 , H01R13/74
CPC分类号： H01R9/2416 , H01R9/18 , H01R9/2491 , H01R13/748
摘要： The present invention relates to an electrical connector, comprising a connector main body (1) and screws (2, 3). The connector main body (1) includes a housing (4), a multi-socket wire connection structure (5), a multi-socket plug-in connection structure (8), and a multi-socket wire disconnection structure (6). The screws (2, 3) are preferably set screws, which comprise a guide structure (9), a thread structure (10), a fall-off prevention structure (11), and a wrenching structure (12). The present invention has advantages of high connection density, ease of wiring connection, high efficiency, being shock-resistant, loosening-proof and reliable, while meeting the IEC 60603-2 standard.

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