电力建设
電力建設
전력건설
ELECTRIC POWER CONSTRUCTION
2014年
11期
7-12
,共6页
公共耦合点(PCC)%谐波阻抗%谐波贡献量%谐波源定位
公共耦閤點(PCC)%諧波阻抗%諧波貢獻量%諧波源定位
공공우합점(PCC)%해파조항%해파공헌량%해파원정위
point of common coupling (PCC)%harmonic impedance%harmonic contribution%harmonic source location
正确估计电网和用户在公共连接点产生的谐波贡献量，是检测和治理谐波污染的关键。现有的一些方法忽略了由于系统谐波阻抗的变化而引起的用户谐波注入的变化。分析了谐波阻抗变化对公共耦合点（point of common coupling，PCC）处谐波含量的影响；分X/R恒定和X/R变动2种情况，建立了MATLAB/Simulink仿真模型，研究谐波阻抗波动对PCC处谐波电流、谐波电压及谐波功率的影响；利用仿真数据和计算结果绘制曲线，得到谐波阻抗对PCC处供电侧和用户侧谐波贡献量的影响规律。结果有助于当谐波阻抗变化引起系统振荡时用户和供电双方责任的划分。
正確估計電網和用戶在公共連接點產生的諧波貢獻量，是檢測和治理諧波汙染的關鍵。現有的一些方法忽略瞭由于繫統諧波阻抗的變化而引起的用戶諧波註入的變化。分析瞭諧波阻抗變化對公共耦閤點（point of common coupling，PCC）處諧波含量的影響；分X/R恆定和X/R變動2種情況，建立瞭MATLAB/Simulink倣真模型，研究諧波阻抗波動對PCC處諧波電流、諧波電壓及諧波功率的影響；利用倣真數據和計算結果繪製麯線，得到諧波阻抗對PCC處供電側和用戶側諧波貢獻量的影響規律。結果有助于噹諧波阻抗變化引起繫統振盪時用戶和供電雙方責任的劃分。
정학고계전망화용호재공공련접점산생적해파공헌량，시검측화치리해파오염적관건。현유적일사방법홀략료유우계통해파조항적변화이인기적용호해파주입적변화。분석료해파조항변화대공공우합점（point of common coupling，PCC）처해파함량적영향；분X/R항정화X/R변동2충정황，건립료MATLAB/Simulink방진모형，연구해파조항파동대PCC처해파전류、해파전압급해파공솔적영향；이용방진수거화계산결과회제곡선，득도해파조항대PCC처공전측화용호측해파공헌량적영향규률。결과유조우당해파조항변화인기계통진탕시용호화공전쌍방책임적화분。
The proper estimation for the harmonic contributions of power system and customers on PCC (point of common coupling)is the key of the supervision and management of harmonic pollution.Some of the existing methods ignore the user harmonic injection changes caused by system harmonic impedance change.Therefore,this paper focused on the analysis of the influence of impedance changes on PCC harmonic content.Based on two cases:constant X/R and X/R changing,MATLAB/Simulink simulation model was built to study the effect of impedance fluctuations on the PCC harmonic current,harmonic voltage and harmonic power.The curve was drawn with using the simulation data and calculated result,and the influence law of harmonic impedance on power supply side and user side harmonic contribution at PCC was obtained.The result is helpful to divide responsibilities of users and power supply when harmonic impedance changing causes system oscillation.
