分布式电源的接入对配电网的影响 .doc

摘 要 分布式发电作为一种新兴的发电技术，以其高效、环保的特点在近几年获得了飞速的发展。研究分布式电源的引入对配电网保护所带来的影响及提出相应的对策是十分必要的，对于分布式电源的发展和推广有着重要的意义。 分布式电源接入配电网后，对继电保护虽有可能提高原有保护的灵敏度，但也有可能影响原有保护的定值，造成原有保护误动或拒动，降低原有保护的灵敏度。对电能质量的电压波动既有抑制作用也能使其波动更严重，还能使谐波电压电流和电压分布产生影响。本论文重点分析了分布式电源接入对配电网继电保护和电压质量的影响。 本次论文是从分布式电源对继电保护的电流保护、保护的灵敏度降低、对重合器与分段器配合馈线的影响等方面进行分析的，得出分布式电源对继电保护的助增电流加大；在继电保护的上游时，有助增作用，是保护范围加大；分布式电源在继电保护下游时，有分流作用，使保护范围减小等结论，对电能质量的电压波动与闪变、电力谐波、电压稳定性等分析也得出了分布式电源的接入对配电网电能质量有影响。 关键词：分布式电源 配电网 继电保护 电能质量 Abstract  Distributed generation as a new power generation technology, with its efficient, environmentally friendly features in recent years gained rapid development. The introduction of distributed power distribution network to protect against the impact and put forward countermeasures is necessary for the distributed power of the development and promotion of great significance.  Distributed power distribution network access after the relay, which is likely to improve on the sensitivity of the existing protection, but also may affect the original value of protection, resulting in the original protection malfunction or rejecting action to reduce the sensitivity of the original protection . The voltage fluctuation of power quality can both inhibit its volatility is more serious, but also the harmonic voltage and current and voltage distribution of an impact. This paper analyzed the distributed power access to the Distribution Network and voltage quality.  The paper is distributed power to the relays current protection, protection of the sensitivity reduction of recloser device with sub-areas with feeders of the analysis, obtained the aid distributed by the power of the relay protection current increase; in protection of the upper reaches, will help increase the role is to increase the scope of protection; distributed power downstream at the relay, there were diverted, reducing the scope of protection such conclusions, the voltage on the power quality fluctuation and flicker, power harmonics, voltage stab