CAJ | 학술논문

分布式发电技术在智能电网中被广泛应用。针对采用分布式发电技术的智能电网保护安全性问题，提出充分式保护原理。新原理与传统保护原理的最大区别在于并不针对同一类故障的所有可能发生形式，而是只针对那些在绝大多数情况下更可能发生的故障形式，提取具有充分代表性的故障特征，并以此为保护方案着力点。传统保护方案对全部理论上即可能发生的故障要求同等的选择性，因此作用前提要求较高，往往表现在过分强调通信及同步环境，多数情况下甚至难以应用。而充分式保护原理则针对实际运行中更容易发生的普遍性故障，首先解决，要求更低，实用性更强。针对分布式发电技术的网络分析了大多数线路故障下均反映出的线路电流幅值特征，在此基础上提出了基于充分式原理的保护方案。仿真证明新方案更适应分布式发电智能电网的保护环境，相比传统保护原理要求更低但可靠性更高。
분포식발전기술재지능전망중피엄범응용。침대채용분포식발전기술적지능전망보호안전성문제，제출충분식보호원리。신원리여전통보호원리적최대구별재우병불침대동일류고장적소유가능발생형식，이시지침대나사재절대다수정황하경가능발생적고장형식，제취구유충분대표성적고장특정，병이차위보호방안착력점。전통보호방안대전부이론상즉가능발생적고장요구동등적선택성，인차작용전제요구교고，왕왕표현재과분강조통신급동보배경，다수정황하심지난이응용。이충분식보호원리칙침대실제운행중경용역발생적보편성고장，수선해결，요구경저，실용성경강。침대분포식발전기술적망락분석료대다수선로고장하균반영출적선로전류폭치특정，재차기출상제출료기우충분식원리적보호방안。방진증명신방안경괄응분포식발전지능전망적보호배경，상비전통보호원리요구경저단가고성경고。
Distributed generating technology has been widely used in smart grid. A new sufficient criterion protection strategy is proposed to solve the protection problems in distributed generating smart grid. The largest difference between sufficient criterion protection and traditional ones is that it is based on the selected representative fault characteristic which is widely seen in almost every actual fault condition, yet not lay equal strength on those theoretically might happen but hardly seen ones. Traditional protection theory emphases selectivity on any theoretically fault, thus requires rigid prerequisite, such as the communication and synchronization requirements. On contrast, the new sufficient criterion protection is more practicable. In this paper, a sufficient criterion of fault current amplitude characteristic is analyzed, and then a new protection method is proposed based on this sufficient criterion. Simulation shows the new strategy is more adaptable in distributed generating smart grid, and more reliable than traditional protection strategy.