电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2015年
2期
126-132
,共7页
无功补偿%不平衡负载%线路调整法%三相不平衡度%负荷电流
無功補償%不平衡負載%線路調整法%三相不平衡度%負荷電流
무공보상%불평형부재%선로조정법%삼상불평형도%부하전류
reactive power compensation%unbalanced load%Line Adjustment Act%three phase unbalance%load current
针对低压配电网不平衡负载降损的问题,会联想到电容补偿器,其在供电系统中起到提高电网的功率因数与降低供电变压器及输送线路的损耗,提高供电效率以及改善供电环境的作用。传统方法只需计算出负载所需要补偿的导纳值,然后配置相应的电容器,比较新的一种导纳值计算方法如平衡分量法。提出一种“线路调整法”的降损补偿方法,进行负荷三相平衡线路调整,仅需对用户集表箱的接入相做调整。提出一种基于优化算法的智能换相策略,不需要增加额外投资,通过算例分析验证了此方法的正确性和有效性。因此,“线路调整法”是一种更简单、更经济的降损方法。
針對低壓配電網不平衡負載降損的問題,會聯想到電容補償器,其在供電繫統中起到提高電網的功率因數與降低供電變壓器及輸送線路的損耗,提高供電效率以及改善供電環境的作用。傳統方法隻需計算齣負載所需要補償的導納值,然後配置相應的電容器,比較新的一種導納值計算方法如平衡分量法。提齣一種“線路調整法”的降損補償方法,進行負荷三相平衡線路調整,僅需對用戶集錶箱的接入相做調整。提齣一種基于優化算法的智能換相策略,不需要增加額外投資,通過算例分析驗證瞭此方法的正確性和有效性。因此,“線路調整法”是一種更簡單、更經濟的降損方法。
침대저압배전망불평형부재강손적문제,회련상도전용보상기,기재공전계통중기도제고전망적공솔인수여강저공전변압기급수송선로적손모,제고공전효솔이급개선공전배경적작용。전통방법지수계산출부재소수요보상적도납치,연후배치상응적전용기,비교신적일충도납치계산방법여평형분량법。제출일충“선로조정법”적강손보상방법,진행부하삼상평형선로조정,부수대용호집표상적접입상주조정。제출일충기우우화산법적지능환상책략,불수요증가액외투자,통과산례분석험증료차방법적정학성화유효성。인차,“선로조정법”시일충경간단、경경제적강손방법。
For low-voltage distribution network unbalanced load loss reduction, we think of the capacitance compensation, which can improve the power factor of power grid and reduce the loss of power transformers and transmission lines, as well as improve the efficiency of power supply improvement and environment in the power supply system. Traditional methods simply calculate the admittance compensation value required by the load, then configure the appropriate capacitor;a relatively new kind of admittance calculation method is the balance component method. This paper puts forward a "Line Adjustment Act" drop loss compensation method to perform three phase load line regulation, which only adjusts the access phase of users’ meter box. A commutation strategy based on intelligent optimization algorithm is proposed, which does not require additional investment, and through a numerical example, the validity and effectiveness of this method are verified. Therefore, the"Line Adjustment Act"is a more simple and more economical method of reducing loss.