P Available + P Limited Sample Clauses

P Available + P Limited. In this test the plant must limit the delivered power to the grid. As explained in section 2.6.1.8 the operating mode P limited shall not operate alone, but shall limit another mode which, in this case, shall be P available. Within the test, three tests with different P limitation were carried out. These tests will show the priority in power reduction according to generation cost and the capacity of the battery to be charged according to the available power and energy price. These 3 tests are the following: • P limited to 70% • P limited to 50% • P limited to 25% The set point value for P Limited is calculated in relation to the maximum permitted plant output, 850 kW. P LIMITED 70 % CASE 1. The first of the three tests has the active power limited to 70%. Figure 36 shows how the active power limitation occurs in the wind turbine, while the photovoltaic produces the maximum it can at any given time. In fact, if the graph is analyzed in more detail, it can be seen how, when the production of the photovoltaic increases, the controller limits even more the production of the active power from the wind turbine. Likewise, there are times when 595 kW (70% of 850 kW) is not reached, due to insufficient renewable resources. However, this is a situation that can occur, above all, if the P limited requirement is very demanding and the variability of the resource is high, as is in this situation. P Limited mode is activated by the operator in t = 170 s and deactivated in t = 800 s. Setpoint Values P-Grid P-WTG P-PV P-BAT Figure 36. P Limited to 70 % Case 1. In this case the production of active power will be limited to 50%, which is 425 kW. P Limited mode is activated by the operator after 170 s and deactivated after 800 s. In Figure 37 it can be seen how, as in the previous case, the limitation of P occurs in the wind turbine, while photovoltaic produces the maximum it can at any given time. P Limited mode is activated by the operator in t = 170 s and deactivated in t = 800 s. Setpoint Values P-Grid P-WTG P-PV P-BAT Figure 37. P Limited to 50 % Case 2. In this case the active power production limitation is set at 25%, 212.5 kW. P Limited mode is activated by the operator after 80 s and deactivated after 750 s. What will be observed is that the reduction of the wind turbine will be the maximum possible, but it will not be enough. Therefore, the photovoltaic plant must also limit its power production. On the other hand, a second variable is added to this test, which is ...
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