CAJ | 학술논문

为了实现基于响应的电力系统暂态稳定实时紧急控制，提出了一种基于相对动能概念的紧急控制方案。该方案通过转速差相对功角差变化趋势实时辨识电网暂态稳定性，当判断出系统将会失去功角稳定时，基于两机系统中相对动能的概念计算剩余加速面积，进而同步得到切机措施量。考虑了控制动作延迟时间的影响，使得计算结果更加可靠。该方案脱离了电力系统的元件模型和运行方式的计算，只需利用系统的动态响应曲线，适应任意复杂的运行方式和故障形式。计算仅使用实测的发电机功角和转速量，计算量小，使用方便灵活。通过新英格兰10机39节点算例验证了该方案的有效性。仿真结果表明，该方案可以防止系统进一步恶化甚至造成大停电事故，加强了电网安全稳定防御体系，具有很好的工程实用价值。
위료실현기우향응적전력계통잠태은정실시긴급공제，제출료일충기우상대동능개념적긴급공제방안。해방안통과전속차상대공각차변화추세실시변식전망잠태은정성，당판단출계통장회실거공각은정시，기우량궤계통중상대동능적개념계산잉여가속면적，진이동보득도절궤조시량。고필료공제동작연지시간적영향，사득계산결과경가가고。해방안탈리료전력계통적원건모형화운행방식적계산，지수이용계통적동태향응곡선，괄응임의복잡적운행방식화고장형식。계산부사용실측적발전궤공각화전속량，계산량소，사용방편령활。통과신영격란10궤39절점산례험증료해방안적유효성。방진결과표명，해방안가이방지계통진일보악화심지조성대정전사고，가강료전망안전은정방어체계，구유흔호적공정실용개치。
To realize the response-based power system transient stability control of power systems, a real-time emergency control scheme was proposed in this paper, which is based on the relative kinetic energy. This method identified the transient stability according to the trend of rotor speed difference varying with rotor angle difference. When the system was judged to be unstable, the amount of generation tripping was obtained with the remaining accelerating area which was calculated based on the relative kinetic energy in the double-machine system. This method taked into account the impact of the control action delay to enhance the reliability of the calculation result. In addition, this method depends on system dynamic response curves rather than power system component models and operation conditions, thus it is suited to different operation conditions and different types of contingencies in power systems. It only needs the data about the generator rotor angle and the rotor speed, so it has low computational complexity, and is convenient and flexible. Simulation on the New England 10-generator 39-bus system verified the effectiveness of the proposed scheme. The simulation results show the proposed scheme can prevent the system from further deteriorating and even widespread blackout. The scheme can strengthen the power system security defense framework and has a certain practical engineering value.