CAJ | 학술논문

甘南电网通过处于高海拔的330 kV枢纽变电站与甘肃主网进行功率交换，但当枢纽变电站受雷击或其他电气故障时会使甘南电网形成合作和洛大孤网。考虑甘南电网容量小，系统惯性较小且频率易波动的特点，针对甘南外送型电网实际，基于PSASP6．282软件仿真分析了合作孤网运行时频率的动态过程；通过分析小容量电网孤网运行时的高、低频特性，以及调研甘南电网在孤网运行方式下的薄弱点和危险点，提出了甘南孤网运行的频率稳定控制策略，并通过仿真验证了控制策略能够保证网内重要变电所和重载联络线安全稳定运行，从而为甘南电网安全稳定，经济优质运行提供可靠地理论指导。
감남전망통과처우고해발적330 kV추뉴변전참여감숙주망진행공솔교환，단당추뉴변전참수뢰격혹기타전기고장시회사감남전망형성합작화락대고망。고필감남전망용량소，계통관성교소차빈솔역파동적특점，침대감남외송형전망실제，기우PSASP6．282연건방진분석료합작고망운행시빈솔적동태과정；통과분석소용량전망고망운행시적고、저빈특성，이급조연감남전망재고망운행방식하적박약점화위험점，제출료감남고망운행적빈솔은정공제책략，병통과방진험증료공제책략능구보증망내중요변전소화중재련락선안전은정운행，종이위감남전망안전은정，경제우질운행제공가고지이론지도。
Gannan grid exchanges power with Gansu main grid via a 330 kV hub substation at a high altitude, however, when the hub substation is struck by lightning or affected by other electrical fault, He-zuo and Luoda isolated grids will be formed in Gannan grid.Given that the Gannan grid is of small capac-ity, the system is of small inertia and high frequency fluctuations, aiming at the actual outgoing type of Gannan grid, simulations based on software PSASP6.282 are made to analyze the dynamic frequency process of Hezuo grid in isolated network operation.By analyzing the high and low frequency characteris-tics of small-capacity grid in isolated network operation and researching the vulnerabilities and danger-ous points of Gannan grid in isolated network operation, a frequency stability control strategy is proposed to deal with isolated Gannan grid operation, meanwhile simulations are made to verify that the strategy can guarantee some important substations and overloading contact wires in the grid operating in safe and stable state.Consequently, it provides reliable theoretical guidance for the security, stability and high-quality economic operation of Gannan grid.