公开(公告)号：EP3232217A1

公开(公告)日：2017-10-18

申请号：EP16165491.8

申请日：2016-04-15

Applicant: ABB Technology Oy

Inventor： Salmi, Esa ,  Tervo, Hermanni ,  Viitanen, Tero

IPC: G01R31/42 ,  G01R31/02

CPC classification number: G01R31/028 ,  G01R31/42 ,  H02M1/126

Abstract: A method of determining condition of filter capacitance of a filter connected to the phases of a converter and adapted to be connected to an alternating voltage source (12) and a converter. The converter comprising parallel converter legs having upper (T1, T2, T3) and lower semiconductor switches (T4, T5, T6) with antiparallel connected diodes (D1, D2, D3, D4, D5, D6) connected in series between positive and negative buses (DC+, DC-), wherein the points between the upper and lower semiconductor switches form the phases (a, b, c) of the converter. The filter comprising inductive components (L c,a , L c,b , L c,c ) and capacitors (C ab , C bc , C ca ), the inductive components being connected to the phases of the converter and the capacitors connecting the other ends of the inductive components. The method comprises charging the capacitors of the filter, controlling the semiconductor switches of the converter for short circuiting the capacitors through the inductive components while the filter is disconnected from the alternating voltage source, measuring a current or a voltage in the circuit, determining from the oscillation of the measured current or voltage the condition of the capacitors of the filter.

Abstract translation: 一种确定连接到转换器的相并且适于连接到交流电压源（12）和转换器的滤波器的滤波器电容的条件的方法。 该转换器包括具有上（T1，T2，T3）和具有反并联连接的二极管（D1，D2，D3，D4，D5，D6）的下半导体开关（T4，T5，T6）的并联转换器支路， 总线（DC +，DC-），其中上部和下部半导体开关之间的点形成转换器的相位（a，b，c）。 所述滤波器包括电感性组件（Lc，a，Lc，b，Lc，c）和电容器（Cab，Cbc，Cca），所述电感性组件连接到所述转换器的相和连接所述电感性组件的另一端的电容器 。 该方法包括对滤波器的电容器进行充电，控制变换器的半导体开关，以在滤波器从交流电压源断开的同时使电容器短路通过电感部件，测量电路中的电流或电压，根据 测量的电流或电压的振荡是滤波器电容器的状况。