The purpose of this study is to solve the main problems in distribution networks, including increased line loss and reduced power supply quality caused by insufficient capacitive reactive power. To reduce the capacity, voltage, and current stress of an active module of a compensation device and improve the cost performance of the device, an improved hybrid reactive power compensation system based on a fixed capacitor (FC) and a static synchronous compensator (STATCOM) is proposed. The topological structure and basic operating principle of the proposed reactive power compensation system are introduced. In addition, from the perspectives of output voltage, current, power, loss of the active part, and system compensation cost, the performances of the proposed reactive compensator and the inductively coupled STATCOM (L-STATCOM) are compared and analyzed. Furthermore, the key parameters of the proposed system are designed, and the joint optimization control strategy of the FC and STATCOM is studied.The correctness and effectiveness of the proposed topology structure and control method are verified by simulations.
Abstract. Through analyses of the current situation of investment control in international and domestic engineering supervision companies, this paper has expounded on deficiencies in project investment control of engineering supervision companies in China and analyzed the specific tasks of investment control in engineering supervision companies at home and abroad. Furthermore, it has proposed the direction for further development of investment control tasks in engineering supervision companies in China and thus has paved way for the integration between engineering supervision companies and international engineering consulting companies, the globalization of engineering supervision companies and their development as engineering management companies with international competitiveness.
Aiming at practical situations, multiple tasks may be because the location is relatively concentrated, leading users will choose, is a consideration of these tasks jointly issued together package. In such case, the pricing model of how to modify the front, to the final completion of the mission and what's the effect? In two under the premise of the model taken together, the task Crowd-sourcing issued to members of the APP program, combined with the Crowd-sourcing mode of operation of the process, the use of reverse guide price method, get a new pricing method, Shenzhen Baoan District City, Shenzhen Luohu District City, Nanhai District of Foshan city in the more populous intensive article using the above Crowd sourcing pricing at In the less expensive areas, the pricing game between members and task providers is adopted.
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