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1.发明公开
公开(公告)号：EP4290721A1
公开(公告)日：2023-12-13
申请号：EP22749146.1
申请日：2022-01-29
发明人： LU, Jiang , DONG, Yunlong , YU, Xiang , YANG, Jianming , WANG, Yangzheng , LU, Yu , TIAN, Jie , LI, Haiying , QIU, Defeng , HUANG, Ruhai
摘要： The invention provide a method and device for handling a DC-side line fault of a voltage source converter, wherein the voltage source converter is arranged at a rectifier end or an inverter end of any DC pole of a DC transmission system, and the rectifier end and the inverter end are connected through a DC line. The fault handling method comprises: acquiring a normal value of a DC voltage reference value of the voltage source converter; setting a DC current limiting target value of the voltage source converter; acquiring a DC current limiting control output value based on a DC current measured value and the DC current limiting target value; setting a DC voltage reference value of the voltage source converter based on the normal value of the DC voltage reference value and the DC current limiting control output value; setting the DC current limiting target value to be zero when a DC side line fault is detected; and rising the DC voltage reference value of the voltage source converter in response to end of de-ionization, and changing the DC current limit target value of the voltage source converter.
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2.发明公开
公开(公告)号：EP3618212A1
公开(公告)日：2020-03-04
申请号：EP18806444.8
申请日：2018-05-22
发明人： PAN, Lei , TIAN, Jie , DONG, Yunlong , LU, Yu , HUANG, Ruhai , JIANG, Chongxue , LU, Jiang , ZHANG, Baoshun , QIU, Defeng , XIE, Hua
IPC分类号： H02H7/26
摘要： A method and apparatus for suppressing the impact of a compensator on line distance protection is provided, wherein the method comprises: obtaining a first current of a line connected to a compensator or series converters in the compensator, and a first voltage of a bus connected to the compensator or the line connected to the compensator; exiting the series converters and series transformers if the first current is greater than a preset current threshold and a duration is greater than a first preset time threshold; exiting the series converters and the series transformers if the first voltage is less than or equal to a preset voltage threshold and duration is greater than a second preset time threshold set the output voltage of the series converters to zero, and if a second current of an element corresponding to the first current meets conditions which the first current needs to meet; and otherwise, canceling the setting of the output voltage of the series converters to zero and obtaining a first current if a second voltage of the line corresponding to the first voltage is greater than the preset voltage threshold and the duration is greater than a third preset time threshold.
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公开(公告)号：EP3480913A1
公开(公告)日：2019-05-08
申请号：EP17841031.2
申请日：2017-08-15
发明人： HUANG, Ruhai , LU, Yu , DONG, Yunlong , PAN, Lei , QIU, Defeng , JIANG, Chongxue , LU, Jiang , LI, Gang , HU, Zhaoqing , WANG, Nannan , DING, Jiudong , WANG, Ke , HU, Xianlai , WANG, Hui , SUI, Shunke
IPC分类号： H02J3/00
摘要： A series compensation device suitable to double-circuit lines is disclosed. The device includes one series transformer and one converter. One converter and dual-circuit transmission lines are respectively connected to three windings of one series transformer. In the solution provided in the present application, the device can be independently installed in a power transmission system to be used as a static synchronous series compensator, and can also be used as a component of a unified power flow controller, a convertible static compensator, an interline power flow controller and a unified power quality conditioner to be connected to a power transmission system device in series. The device can save the capacity of a converter, improve the application efficiency of the series compensation device, and reduce the cost and area occupation.
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公开(公告)号：EP3787142A1
公开(公告)日：2021-03-03
申请号：EP19811344.1
申请日：2019-03-21
发明人： DONG, Yunlong , ZHANG, Baoshun , PAN, Lei , HUANG, Ruhai
IPC分类号： H02J3/18
摘要： Provided in the present application are a compensator, a control method and device therefor. The compensator comprises: a first inverter, comprising six branch circuits, the branch circuits comprising combined power units and reactors connected in series; the combined power units comprising: first power units and second power units connected in series or second power units connected in series; a first transformer, at least comprising a first side winding and a second side winding, the first side winding being connected to an alternating current-side interface of the first inverter, the second side winding being connected in series to a circuit of an alternating current system; the second side winding being connected in parallel on either end to a switch; and the switch, connected in parallel to the first transformer and then connected to the circuit of the alternating current system.
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公开(公告)号：EP3672008A1
公开(公告)日：2020-06-24
申请号：EP18891849.4
申请日：2018-09-11
发明人： PAN, Lei , TIAN, Jie , CAO, Dongming , DONG, Yunlong , ZHOU, Qiwen , HUANG, Ruhai , DING, Fengfeng
IPC分类号： H02H9/02
摘要： The present invention provides a series compensator and a control method. The series compensator includes a series transformer, a series transformer bypass device, a voltage source converter, a high-speed converter bypass device, a high-speed switch, and a reactor. The reactor and the high-speed switch are connected in parallel to form a current limiting module; one winding of the series transformer has two ends connected in series to a line, and the other winding thereof is sequentially connected to the current limiting module and the high-speed converter bypass device; the voltage source converter and the high-speed converter bypass device are connected in parallel; and at least one winding of the series transformer are connected in parallel to at least one series transformer bypass device. The series compensator of the present invention indirectly provides the current limiting module, so as to effectively limit the short-circuit current of a system, reduce the fault current to which the compensator is subjected, and improve the reliability of an alternating current system and the series compensator. Moreover, the current limiting module has a low voltage level, and the high-speed switch has a small breaking current, thereby providing good industrial applicability.
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