Electrical power systems for distributing electrical power in arrangements including one or more gas turbine engines; one such system includes: one or more rotary electric machines, coupled to a gas turbine engine spool; converter circuits connected to the rotary electric machines converting between alternating current (ac) and direct current (dc), wherein the rotary electric machines and the converter circuits output a number R≥2 of dc power channels, each channel having an index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein each dc load channel has an index n=(1, . . . , N) and R<N≤2R. The switching arrangement operates to connect the r-th power channel to the n-th load channel according to the relationship: $r\left(n\right)=\{\begin{array}{cc}1,& n=1\\ \frac{n}{2}\mathrm{and}\frac{n}{2}+1,& 1<n<N\mathrm{and}n=\end{array}$

Electrical power system includes: one or more rotary electric machines, each mechanically coupled to a gas turbine engine spool; a set of converter circuits connected to the one or more rotary electric machines for conversion between alternating (ac) and direct current (dc), wherein one or more rotary electric machines and the set of converter circuits are arranged to output a number R≥2 of dc power channels, each dc power channel having a respective index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein N>R and each dc load channel has a respective index n=(1, . . . , N). The switching arrangement is operable to connect a number Q≥1 of the N load channels to at least two different power channels of the R power channels.

Electrical power systems for distributing electrical power in arrangements including one or more gas turbine engines; one such system includes: one or more rotary electric machines coupled to a gas turbine engine spool; a set of converter circuits connected to the rotary electric machines converting between alternating current (ac) and direct current (dc), wherein the rotary electric machines and the converter circuits output a number R≥2 of dc power channels, each channel having an index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein N>R and each dc load channel has an index n=(1, . . . , N). For each respective N load channels, a current limiting device (CLD) limits the current flowing from power channels to a load connectable to the electrical power system via the respective load channel.

Electrical power systems for distributing electrical power in aircraft are described. One such electrical power system comprises: an electrical power source configured to output a number R≥2 of dc power channels, each dc power channel having a respective index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein N>R and each dc load channel has a respective index n=(1, . . . , N). The system further comprises, for each respective one of a plurality of the N load channels, a current limiting device (CLD) operable to limit an amount of current flowing from the power channels to a load connectable to the electrical power system via the respective load channel. The electrical power source may comprise one or more batteries.

Electrical power systems for distributing electrical power in aircraft are described. One such electrical power system comprises: an electrical power source configured to output a number R≥2 of dc power channels, each dc power channel having a respective index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein each dc load channel has a respective index n=(1, . . . , N) and R<N≤2R. The switching arrangement is operable to connect the r-th power channel to the n-th load channel according to the relationship:

[00001]$\begin{array}{cc}r\left(n\right)=\{\begin{array}{cc}1,& n=1\\ \frac{n}{2}\mathrm{and}\frac{n}{2}+1,& 1<n<N\mathrm{and}n=0\left(\mathrm{mod}2\right)\\ \frac{n-1}{2}\mathrm{and}\frac{n+1}{2},& 1<n<N\mathrm{and}n=1\left(\mathrm{mod}2\right)\\ R,& n=N\end{array}.& \mathrm{FIG}.4\mathrm{for}\mathrm{publication}\end{array}$

Electrical power systems for distributing electrical power in arrangements including one or more gas turbine engines; one such system includes: one or more rotary electric machines, coupled to a gas turbine engine spool; converter circuits connected to the rotary electric machines converting between alternating current (ac) and direct current (dc), wherein the rotary electric machines and the converter circuits output a number R≥2 of dc power channels, each channel having an index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein each dc load channel has an index n=(1, . . . , N) and R<N≤2R. The switching arrangement operates to connect the r-th power channel to the n-th load channel according to the relationship:

[00001]$ r ⁡ ( n ) = { 1 , n = 1 n 2 ⁢ ⁢ and ⁢ ⁢ n 2 + 1 , 1 < n < N ⁢ ⁢ and ⁢ ⁢ n = 0 ⁢ ⁢ ( mod ⁢ 2 ) n - 1 2 ⁢ ⁢ and ⁢ ⁢ n + 1 2 , 1 < n < N ⁢ ⁢ and ⁢ ⁢ n =< Intelligent current limiting for solid-state switching 11394199 · 2022-07-19 · Abb Schweiz Ag · Li Qi, Taosha Jiang, Antonello Antoniazzi Systems, methods, techniques and apparatuses of high current protection are disclosed. One exemplary embodiment is a power system comprising a solid-state circuit breaker including a solid-state switching device, an energy dissipation branch, an assistive branch, and a controller. The energy dissipation branch is coupled in parallel with the solid-state switching device and includes an energy dissipation device. The assistive branch is coupled in parallel with the solid-state switching device and includes a resistor, an inductor, and a galvanic isolation switching device coupled together in series. The controller is configured to determine the solid-state circuit breaker is conducting a high magnitude current, select a continuous current limiting mode or an intermittent current limiting mode, and operate the solid-state switching device based on the selected current limiting mode. ELECTRICAL POWER SYSTEMS 20220281609 · 2022-09-08 · ROLLS-ROYCE plc · Graham P. BRUCE Electrical power systems for distributing electrical power in arrangements including one or more gas turbine engines; one such system includes: one or more rotary electric machines coupled to a gas turbine engine spool; a set of converter circuits connected to the rotary electric machines converting between alternating current (ac) and direct current (dc), wherein the rotary electric machines and the converter circuits output a number R≥2 of dc power channels, each channel having an index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein N>R and each dc load channel has an index n=(1, . . . , N). For each respective N load channels, a current limiting device (CLD) limits the current flowing from power channels to a load connectable to the electrical power system via the respective load channel. INTELLIGENT CURRENT LIMITING FOR SOLID-STATE SWITCHING 20220085600 · 2022-03-17 · Li Qi, Taosha Jiang, Antonello Antoniazzi Systems, methods, techniques and apparatuses of high current protection are disclosed. One exemplary embodiment is a power system comprising a solid-state circuit breaker including a solid-state switching device, an energy dissipation branch, an assistive branch, and a controller. The energy dissipation branch is coupled in parallel with the solid-state switching device and includes an energy dissipation device. The assistive branch is coupled in parallel with the solid-state switching device and includes a resistor, an inductor, and a galvanic isolation switching device coupled together in series. The controller is configured to determine the solid-state circuit breaker is conducting a high magnitude current, select a continuous current limiting mode or an intermittent current limiting mode, and operate the solid-state switching device based on the selected current limiting mode. ANNULAR BEARER NETWORK AND SERVICE BEARING IMPLEMENTATION METHOD THEREFOR 20210273446 · 2021-09-02 · Lianhong Zhong, Xinhui Duan, Meng Song, Chao Sheng, Bing Zhao, Li Li, Yunsong Luo, Yajun Xia, Wenfeng Cheng, Zhengjun Shi, Xiaoqing Xiao, Youxin Lin Provided are a method and apparatus for calculating fault resistance and a current-limiting current of a superconducting fault current limiter. The method includes: calculating a first short-circuit fault current I.sub.n(t) of a power grid short-circuit fault transient circuit calling an external characteristic model U(I, t), and calculating resistance R.sub.n(t) of a superconducting fault current limiter under the first short-circuit fault current I.sub.n(t); adding the resistance R.sub.n(t) of the superconducting fault current limiter into the power grid short-circuit fault transient circuit, and calculating a second short-circuit fault current I.sub.m(t), where m=n+1; and determining whether an error between the second short-circuit fault current I.sub.m(t) and the first short-circuit fault current I.sub.n(t) is smaller than a preset threshold value, if yes, determining the fault resistance and the current-limiting current of the superconducting fault current limiter to be R.sub.n(t) and I.sub.m(t) respectively; otherwise I.sub.n(t)=I.sub.m(t), returning for iteration. $