CAJ | 학술논문

为了保证电网的运行安全,在西北、新疆电网联网的条件下,对河西走廊远距离大容量输电问题进行了数字仿真研究,着重分析了河西走廊在风电大规模接人情况下的输电能力及相关敏感因素的影响;同时,为保证电能的顺利送出,还从系统正常运行和故障状态两个层面,就其中矛盾较为突出的风电波动带来的电压无功控制以及严重故障下的安全控制措施配置等问题进行了探讨.研究结果表明:线路串补、线路类型、河西通道开机方式以及电力系统稳定器(PSS)等都对河西750 kV线路的输电能力有一定的影响;同时在风电投运后,风电带来的系统电压大幅波动以及系统安全控制措施配置方面的困难都将对系统的安全稳定运行带来新的挑战.针对上述问题,给出了提高通道输电能力和保证系统正常运行的初步措施和建议.
위료보증전망적운행안전,재서북、신강전망련망적조건하,대하서주랑원거리대용량수전문제진행료수자방진연구,착중분석료하서주랑재풍전대규모접인정황하적수전능력급상관민감인소적영향;동시,위보증전능적순리송출,환종계통정상운행화고장상태량개층면,취기중모순교위돌출적풍전파동대래적전압무공공제이급엄중고장하적안전공제조시배치등문제진행료탐토.연구결과표명:선로천보、선로류형、하서통도개궤방식이급전력계통은정기(PSS)등도대하서750 kV선로적수전능력유일정적영향;동시재풍전투운후,풍전대래적계통전압대폭파동이급계통안전공제조시배치방면적곤난도장대계통적안전은정운행대래신적도전.침대상술문제,급출료제고통도수전능력화보증계통정상운행적초보조시화건의.
In order to enhance the system operational security,the long distance and huge capacity transmission of Gansu corridor under the Northwest Power Grid and the Xinjiang Power Grid interconnection condition is studied by digital simulation method,in which the transmission capacity and the influence of related sensitive factors are discussed with the large-scale wind power integration considered.In order to ensure the transmission of power energy,the voltage and reactive power control against the fluctuation of the wind power and the security control measure against the serious fault are discussed.The research results show that the sensitive factors such as the series compensation,line types,operation model of generation units and the layout of the power system stabilizers(PSS)all have considerable impact to the transmission capacity of Gansu corridor transmission lines.The suggestions of necessary series compensation installation and the reasonable operation model of generation units and the layout of the PSSs are offered.Without corresponding measures,the voltage fluctuation caused by wind power variation will be unbearable to the system operation and due to the increase of wind power penetration,the security control measures will be unpractical under related serious faults circumstance in 2015.The proposal of dynamic var compensation against the voltage fluctuation and the modification suggestion of grid of 2015 are presented.