Trading regulatory risk arises prominently in the preliminary formulation of a unified and interconnected electricity market in China. Risk indices, evaluation models and methods as well as index weights are three important aspects of a comprehensive trading regulatory risk evaluation. In this paper, firstly, on the basis of the current electricity market environment in China, systematic trading regulatory risk indices used to quantify the risk level of the unified and interconnected electricity market are established. Secondly, evaluation models and a evaluation method of the trading regulatory risk are developed on the basis of synthesis of fuzzy inference and analytic hierarchy process (AHP). The fuzzy set approach is employed to identify the membership degree of each index to various risk levels, while the AHP is used to acquire the weights of the proposed trading regulatory risk indices. Finally, a simulation based case study on the trading regulatory risk evaluation is presented to illustrate the effectiveness of the proposed indices and the evaluation method.

Road diet measures are widely used abroad, but they have not been implemented in China. One of the important reasons is that we usually think that the reduction of the number of lanes will cause traffic congestion. In order to evaluate the impact of lane reduction “road diet”measures, we implemented road diet reform measures in Shoushan Road to Longxing Road section of Xinghai North Street, Xingcheng City. After nearly one year of adaptation, we evaluate the implementation plan from three aspects in this study: safety, operation, and subjective feeling. Then design a questionnaire to investigate the subjective feelings of drivers, bicyclists and pedestrians on road diet measures. The questionnaire data shows that 56% of drivers has been illegally occupying the non-motorized road or central yellow line area, the main reason is that the speed of the vehicle ahead is too slow and there is no illegal capture equipment. More than 70% of bicyclists believe that their number of rides has increased. More than 90% of pedestrians think it is easier to cross the street, and they used to stay in the central yellow line area. Using VISSIM and SSAM to evaluate the traffic operation and safety aspects before and after the road reform, the results show that after the reform, the average speed decreases by about 5km/h, the travel time for left turn on the road segment generally increases, and the number of conflict points decreases by about 33%.

With the advancement of electricity deregulation in China, the market entities’ demands for getting high quality information service from power exchange center are growing. Power exchange center needs to establish a comprehensive, efficient and interactive information service platform. In view of the current situation, this paper classifies the large amount of information in electricity market, and analyses the information demands and acquisition channels of market entities. This paper puts forward the architecture of multi-layer collaboration information service system for electricity trading in China. The architecture has a clearly hierarchy and reflects the crucial junctures of information processing. It has the important guiding significance to the power exchange center to provide quality information services for the market entities.

After the establishment of the unified and interconnected electricity market in China, electricity trading range will cover the entire State Grid operating region, and headquarters market and provincial market will become interconnected, unified and coordinated operation. Aiming at the surveillance risk under the unified and interconnected electricity market, a relatively complete surveillance risk index system is proposed. The proposed risk index system includes six first grade indices, i.e., market state, transaction plan, contract and settlement, market coordination, energy efficiency and power grid operation. The risk index system can reasonably and overall reflect the risk level of the electric power transaction under the unified and interconnected electricity market circumstances. It is useful for State Grid to achieve risk management and control of electricity trading surveillance, rectify the irregularities, and maintain a fair and impartial market order.

Concerning the uneven distribution of energy in Chinas regional power grid, power of big energy base should be transmitted through long distance. Therefore, calculating available transfer capability (ATC) of large interconnected grid is necessary. However, it is difficult to collect the needed data, so ATC of the large interconnected grid cannot be calculated directly. To solve these problems, this paper presents a decomposition calculation method to calculate ATC of the large interconnected grid. The basic principles are: According to the executive partition, the large interconnected grid is divided into several subsystems, of which ATC can be calculated directly and easily. Then, according to series or parallel combination between the subsystems, ATC of the large interconnected grid can be calculated indirectly by the obtained ATC of subsystems. The series and parallel ATC probabilistic calculation models are established, used for synthetizing ATC of the subsystems. Illustrations verify the correctness and feasibility of the calculation method.