CAJ | 학술논문

提出一种三相四线制台区电网的状态估计模型。综合考虑电源和负荷端点三相节点的注入电流量测方程、中性点的虚拟量测方程、三相电压幅值量测方程以及T端点三相和中性点的零注入等式约束方程，以端点a、b、c三相及中性点电压的实部和虚部为状态变量，建立台区电网带等式约束的加权最小二乘状态估计模型。该模型采用牛顿法进行求解，并以IEEE13节点修正系统为例进行仿真分析。仿真结果表明，所提模型可有效解决台区电网的状态估计问题，且方法收敛可靠，速度快，满足工程要求。
제출일충삼상사선제태구전망적상태고계모형。종합고필전원화부하단점삼상절점적주입전류량측방정、중성점적허의량측방정、삼상전압폭치량측방정이급T단점삼상화중성점적령주입등식약속방정，이단점a、b、c삼상급중성점전압적실부화허부위상태변량，건립태구전망대등식약속적가권최소이승상태고계모형。해모형채용우돈법진행구해，병이IEEE13절점수정계통위례진행방진분석。방진결과표명，소제모형가유효해결태구전망적상태고계문제，차방법수렴가고，속도쾌，만족공정요구。
A state estimation model is proposed for three-phase four-wire area load. Considering the three-phase node injection current, neutral virtual and voltage amplitude measurement equations of power source and load endpoints, and three-phase zero injection equality constraint equations of T endpoints, a weighted least squares theory state estimation model with equality constraints is developed, which takes the real and imaginary parts of three-phase a, b, c and neutral voltages as state variables. Newton method is used to solve the presented model, and the modified IEEE-13 bus system is used for simulation. The results show that it is effective to solve state estimation problems for area load, and the method shows reliable convergence, fast speed, thus can meet engineering requirements.