CAJ | 학술논문

针对国际学界提出的电网智能运行中风险限制调度的框架,新建考虑线路阻塞的风险限制调度多步整合模型,包括日前三步整合调度模型、时前两步整合调度模型和紧急调度模型.日前三步整合调度是在日前调度中计入预估的时前、紧急调度的随机信息;时前两步整合调度计入了预估的紧急调度随机信息.随机信息主要考虑风电出力,并作为模型中的随机变量.通过定义线路阻塞条件风险(conditional value at risk,CVaR)值,将线路安全约束转化为线路阻塞风险限制约束,实现线路阻塞的风险限制调度.仿真结果表明:线路阻塞CVaR值的限值与置信水平两个值取值合理时,多步整合调度与传统的日前、时前、紧急三步调度相比运行成本较低;当前值限定在一定水平时,后值越大,多步整合调度的成本越高;后值一定时,前值越大,多步整合调度的成本越低.线路阻塞风险限制的多步整合调度模型是解决电力系统智能运行中风险限制调度的有效途径.
침대국제학계제출적전망지능운행중풍험한제조도적광가,신건고필선로조새적풍험한제조도다보정합모형,포괄일전삼보정합조도모형、시전량보정합조도모형화긴급조도모형.일전삼보정합조도시재일전조도중계입예고적시전、긴급조도적수궤신식;시전량보정합조도계입료예고적긴급조도수궤신식.수궤신식주요고필풍전출력,병작위모형중적수궤변량.통과정의선로조새조건풍험(conditional value at risk,CVaR)치,장선로안전약속전화위선로조새풍험한제약속,실현선로조새적풍험한제조도.방진결과표명:선로조새CVaR치적한치여치신수평량개치취치합리시,다보정합조도여전통적일전、시전、긴급삼보조도상비운행성본교저;당전치한정재일정수평시,후치월대,다보정합조도적성본월고;후치일정시,전치월대,다보정합조도적성본월저.선로조새풍험한제적다보정합조도모형시해결전력계통지능운행중풍험한제조도적유효도경.
Multi-step integration models for risk-limiting dispatch of line congestion in power system were firstly built in the paper based on the risk-limiting dispatch frame of grid smart operation proposed by international academic. The multi-step integration dispatch models consist of three steps integration day ahead dispatch model, two steps integration hour ahead dispatch model and emergency dispatch model. Estimated random information of the hour ahead and emergency state is included in the day ahead dispatch model, which forms the three steps integration day ahead dispatch one, etc. Wind power is treated as main random information in the paper and as random variable in the model. The line security constraints are transformed into line congestion risk-limiting constraints by means of the conditional value at risk (CVaR). Then it is named the line congestion risk-limiting dispatch. The simulation results show that the operating total cost of multi-step integration dispatch models is lower than traditional three steps dispatch's under both of advisable limit value for line congestion CVaR and the confidence level. The higher the confidence level, or the tighter the limit for line congestion CVaR is, the higher the operating cost. The novel multi-step integration dispatch model for line congestion risk-limiting is effective to solve the risk-limiting dispatch in the smart operation of power system.