2009年6月5日,华北电网公司与山东电力公司签订了《双边电能交易协议》。根据协议,华北电网与山东电网将通过500千伏辛安至聊城双回线和建成后的500千伏黄骅至滨州双回线进行电能交易,充分发挥华北电网电力资源优化配置能力,保障电力供应。根据《协议》,高峰时段,华北电网将向 June 5, 2009, North China Power Grid Company and Shandong Electric Power Company signed a “bilateral power trading agreement.” According to the agreement, North China Power Grid and Shandong Power Grid will conduct electricity trading through the 500 kV Xin’an-Liaocheng double circuit line and the completed 500 kV Huanghua-Binzhou double circuit line so as to give full play to the optimal allocation of power resources in North China Power Grid to ensure the supply of electricity . Under the “agreement”, during peak hours, North China Power Grid will be