the central cooperative banks occupy a crucial position in the pyramidal structure of agricultural cooperative banking system. they from the backbone of the agricultural credit structure and provide the vital line between the primary agricultural societies and the state apex cooperative bank functioning at the state level. the study is based on secondary data obtained from annual reports of edc...

The central cooperative banks occupy a crucial position in the pyramidal structure of agricultural cooperative banking system. They from the backbone of the agricultural credit structure and provide the vital line between the primary agricultural societies and the state apex cooperative bank functioning at the state level. The study is based on secondary data obtained from annual reports of EDC...

OBJECTIVE To evaluate the impact of olmesartan alone or combined with one to three antihypertensive drugs on 24-h blood pressure variability (BPV) and on distribution of BP reduction in a pooled individual data analysis of 10 double-blind, randomized, ambulatory BP monitoring (ABPM) studies. METHODS ABPMs were performed before and after 6-12 weeks of treatment with placebo (n = 119), active c...

In this paper, direct current (DC) fault limiting and interrupting operation of hybrid DC circuit breaker (DCCB) using double quench, which consists DCCB, a series resonance circuit, power electronic switch, surge arrestor, two separated reactor/resistor, superconducting elements, were suggested. The suggested DCCB can perform the after twice or once according to amplitude. To verify effective ...

DC faults are critical events in a flexible high-voltage dc (HVDC) grid. Thus, ensuring that the power system returns to normal operation rapidly and reliably after fault isolation is very important. This requires HVDC breaker. In overhead line systems under temporary faults, reclosing often required. However, once circuit breaker (DCCB) reclosed directly, large second overcurrent may occur whi...

The development of DC grids faces challenges from fault protection. conventional circuit breaker (DCCB) employs metal-oxide varistor (MOV) to isolate the faulted line, in which isolation process is coupled with energy dissipation process. In this study, a clamping type DCCB (CTCB) uses internal capacitors clamp converter voltage proposed. Thanks proposed configuration, and are decoupled, result...

DC fault clearance is one of the critical issues for modular-multilevel-converter-based high voltage direct current (MMC-HVDC) systems. Employing a hybrid circuit breaker (H-DCCB) to isolate faulty line typical method achieve fast clearance. However, H-DCCB has interrupt and absorb energy up tens megawatts in several milliseconds. Through theoretical analysis interruption process using H-DCCB, ...

Selection of the interruption capabilities HVDC circuit breakers (DCCB) requires an estimation maximum DC-side fault current and absorbed energy. However, estimating these iterating over a large range scenarios. At present, this task is performed for specific grid using extensive time domain simulations in Electromagnetic Transient (EMT)-type software. These require computational effort, especi...

The state of the energy-absorption branch MOV in hybrid DC circuit breaker (DCCB) has a very important impact on short fault breaking operation breaker. Therefore, it is necessary to evaluate MOV, which also called “sleep component”. Due DCCB being placed indoors, aging mainly caused by short-circuit impulse current. this paper focuses study characteristics MOV. dynamic simulation system was bu...

When the direct current circuit breaker (DCCB) fails to operate, fault range will further expand, endangering safe operation of power gird. Therefore, this study proposes a DCCB failure protection method and secondary accelerated isolation scheme voltage source converter-based high-voltage (VSC-HVDC) grids. On basis considering influence disconnection, characteristics after are analyzed, based ...