摘要
微机自动准同期装置在电力系统中已得到广泛应用 ,但其在电压差和频率差控制、并列条件判断等方面仍采用模拟式自动准同期装置的方法 ,没有充分发挥微处理器的数值运算和逻辑判断能力。文中提出并实现了一种新型微机自动准同期装置 ,该装置采用了频率差和电压差的自适应控制方法 ,以及单向频率差和单向相角差并列原则。它不仅能够按照待并发电机调速器和励磁调节器的特性 ,在并列操作时根据频率差和电压差的实际值 ,确定合适的调节量 ,而且使发电机的频率略大于系统频率 ,并列后发电机电压相量不滞后于系统电压相量。所实现的自动准同期装置具有可快速准确同期、对系统冲击小的特点 ,表明所提出的思想方法对事故情况下的大机组快速并网具有较大的实用价值。
In order to overcom e the limitations of the current widely used microprocessor- based autom atic quasi- synchronization device,a new high perform ance device is proposed and developed.During the sychronization process,a self- adjusting algorithm is used to provide proper control law according to the practical operating conditions,i.e.the frequency- difference and voltage- difference. As the frequency of the generator is set a little faster than that of the power system ,it guarantees the voltage vector of the generator is not lag behind that of the system during the instant of the synchronization. The m ain advantages of the developed device have fast speed of synchronization and small im pact to the power system . Details of the control principle,the system hardware configuration and the software implementation of the developed device are all described. Test result shows the effectiveness of the proposed device.
出处
《电力系统自动化》
EI
CSCD
北大核心
2002年第9期75-77,共3页
Automation of Electric Power Systems
