本文以农村配电网低电压现象作为研究目标,以广东地区某10 k V农村配电网支路电压过低的情况为例,提出一种基于MSVC和线路调压器的综合治理方法,既能在不影响别的支路电压的情况下改善待治理支路的电压和功率因数,又可进行理论分析和仿...本文以农村配电网低电压现象作为研究目标,以广东地区某10 k V农村配电网支路电压过低的情况为例,提出一种基于MSVC和线路调压器的综合治理方法,既能在不影响别的支路电压的情况下改善待治理支路的电压和功率因数,又可进行理论分析和仿真验证,结合相关的规程要求,证明该方法有效并且可行。展开更多
To achieve economical compensation for the huge-capacity negative sequence currents generated by high-speed railway load, an electromagnetic hybrid compensation system(EHCS) and control strategy is proposed.The EHCS i...To achieve economical compensation for the huge-capacity negative sequence currents generated by high-speed railway load, an electromagnetic hybrid compensation system(EHCS) and control strategy is proposed.The EHCS is made up of a small-capacity railway static power conditioner(RPC) and a large-capacity magnetic static var compensator(MSVC). Compared with traditional compensation methods, the EHCS makes full use of the SVC’s advantages of economy and reliability and of RPC’s advantages of technical capability and flexibility. Based on the idea of injecting a negative sequence, the compensation principle of the EHCS is analyzed in detail. Then the minimum installation capacity of an EHCS is theoretically deduced. Furthermore, a constraint optimization compensation strategy that meets national standards, which reduces compensation capacity further, is proposed. An experimental platform based on a digital signal processor(DSP) and a programmable logic controller(PLC) is built to verify the analysis. Simulated and experimental results are given to demonstrate the effectiveness and feasibility of the proposed method.展开更多
基金supported by National Key Technology Support Program(No.2013BAA02B00)National Natural Science Foundation of China(No.50807041)+3 种基金Asia Pacific Economic Cooperation FundHubei province science and technology support program(No.2014BAA013)the Fundamental Research Funds for the Central Universities(No.2042014kf0233)the Fundamental Research Funds for the Central Universities(No.2014207020202)
文摘To achieve economical compensation for the huge-capacity negative sequence currents generated by high-speed railway load, an electromagnetic hybrid compensation system(EHCS) and control strategy is proposed.The EHCS is made up of a small-capacity railway static power conditioner(RPC) and a large-capacity magnetic static var compensator(MSVC). Compared with traditional compensation methods, the EHCS makes full use of the SVC’s advantages of economy and reliability and of RPC’s advantages of technical capability and flexibility. Based on the idea of injecting a negative sequence, the compensation principle of the EHCS is analyzed in detail. Then the minimum installation capacity of an EHCS is theoretically deduced. Furthermore, a constraint optimization compensation strategy that meets national standards, which reduces compensation capacity further, is proposed. An experimental platform based on a digital signal processor(DSP) and a programmable logic controller(PLC) is built to verify the analysis. Simulated and experimental results are given to demonstrate the effectiveness and feasibility of the proposed method.
