What is power system dispatch?

Abstract: Power system dispatch is a general concept with a wide range of applications. It is a special category of optimization problems that determine the operation pattern of the power system, resulting in a huge influence on the power system security, efficiency, and economics.

How can power grid operators balance the dispatch economy and frequency security?

In the intra-day stage, the adjustment reserve of generation and AA-CAES can also decrease. In this way, the total dispatch cost decreases. Therefore, by adjusting the confidence level and the quantity of sampling data, the power grid operators can balance the dispatch economy and frequency security. Table 5.

Do energy storage systems (ESS) work well?

Results show that ESS function well on the basis of the proposed model and control scheme, and also demonstrate the superiority of the novel algorithm. Energy storage systems (ESS) are indispensable building blocks of power systems with a high share of variable renewable energy.

What affects the efficiencies and capacities of dis-charging power?

In this proposed model, the efficiencies and capacities of dis-/charging power are affected by operating power and the air storage of the air reservoir. According to the working process on compression and expansion sides, the constant-pressure mode, sliding-pressure mode, throttling control, and hybrid strategy are introduced.

Can a battery model be used to optimize ESS dispatch?

However, the traditional dispatch methods ignore the battery's dynamic power limit and degradation characteristics, which leads to the mismatched power between ESS dispatch commands and the actual optimal responses, and shortened battery lifetime. This paper proposes a novel battery model to achieve an optimized dispatch of ESS.

What is a dispatch strategy?

The detailed set of the strategies is as follows: 1) Dispatch strategy with the frequency security constraints, 2) Dispatch strategy without frequency security constraints: the strategy is obtained from the proposed dispatch strategy by omitting its frequency inertia limits (42) and frequency deviation limits (52).