Analysis on Power Flow Calculation by Considering the Excitation Adjustment Coefficient of Generator
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摘要: 研究了发电机励磁调差系数与无功功率的关系,以及计及发电机励磁调差系数的潮流计算模型。该模型摒弃了传统潮流中将发电机节点设为PV节点的假设,而将发电机节点的电压看成随无功功率而变化的变量。以IEEE14、IEEE30、IEEE118节点和某省实际电网等不同规模的电力系统为算例,并与传统潮流对比,结果表明该算法不仅对小规模电力系统具有很好的收敛性,对大规模电力系统也具有良好的收敛性。本文方法可使潮流计算结果更加准确,无功功率在发电机之间的分配更加合理,并且在维持电压稳定、降低系统网损方面具有优越性。Abstract: On the basis of studying the relationship between the excitation adjustment coefficient and reactive power of generator, a new power flow calculation model by considering the adjustment coefficient of generator is presented in this paper. The assumption of PV node in traditional power flow calculation is abandoned in the model, and the nodal voltages for generators are seen as variables that vary with reactive power. The power system with IEEE14, 30 and 118 nodes and one province power grid are taken as test cases, the results show that the new model has better convergence for both small-scale power system and large scale power system than that of traditional calculation algorithm. In addition, the results of power flow calculation are more accurate, the distribution of the reactive power between generators is more reasonable, and it has advantage on maintaining the voltage stability and lowering system loss.
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Keywords:
- power system /
- power flow calculation /
- adjustment coefficient /
- comparison
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Brown H E.Power flow solution by impedance matrix iterative method[J].IEEE transactions on power apparatus and systems,1963,82(65):1-10. Tinny W F, Hart C E. Power flow solution by newton's method[J].IEEE transactions on power apparatus and systems,1978,6(11):1449-1460. Iwamoto S,Tamura Y.A fast load flow method retaining nonlinearity[J].IEEE transactions on power apparatus and systems,1978,97(5):1586-1599. Iwamoto S,Tamura Y. Improved Newton's Load flow through a minimization technique[J]. IEEE transaction on power apparatus and systems,1971,90(5):1974-1981. 包黎昕,段献忠,何仰赞等.考虑发电机约束条件的潮流计算方法[J].中国电机工程学报,1998,18(17):413-415. 朱凌志,周双喜.电压稳定分析的潮流算法研究[J].电力系统自动化,2000,24(5):1-4. 孙艳,杭乃善.计及机组静态调节特性的电力系统潮流模型[J].中国电机工程学报,2010,30(10):43-49. 孙春顺,王耀南,李欣然等.计及发电机励磁调节器静态特性的电力系统潮流计算方法[J].长沙理工大学学报,2006,3(2):47-52.
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